EP2677085B1 - Trench sheet and shoring unit of trench panels - Google Patents

Description

The present invention relates to a channel dado according to the preamble of claim 1.
Steel channel boards are known for use in the so-called. Steel chamber panel shoring. This technique is used in trenching (eg in pipe laying work) in non-short-term stable soils. In this case, there is first a preliminary lift of only limited depth, are set in the channel struts against each other supported steel chamber plates. In the top and bottom open chambers of the chamber plates are then introduced from the top channel boards and pressed in alternation with the further deeper trenching due to their heavy handling with an excavator spoon to depth. Depending on the extent of the channel boards in their plank longitudinal direction so deeper trenches can be supported or installed on their side walls, being supported in the upper trench cut the channel boards against the also forming a guide chamber plates and depending on the depth of the trench below the chamber plates, the channel boards bspw . be supported by an earth abutment or otherwise. After the example. Laying of pipes, the trench is filled back and pulled out of steel and therefore heavy channel boards pulled out of the chamber plates by means of an excavator, crane or the like, whereupon the chamber plates removed from the remaining trench and the rest filling is made , This known application is referred to as steel chamber plate trenching. Opposite the EP 0 238 783 B1 known trench shoring unit, whose application is usually on A maximum depth of 3 m is limited so that deeper ditches can be created with a larger one free height (pipe installation height) between grave sole and lowest strut position are installed. Another advantage is the possible use in not short-term stable soils, because the channel dowels is always pressed at least so deep that the grave depth runs after the shoring. Even with obstacles in the ground, such as intersecting lines, just a channel dikes can be cut out or just advanced to the obstacle and below the gap, for example. Be installed with planks and screed ends. However, in the conventional chamber plate shoring for the known application described and their requirements, the channel boards and the chamber plates are each made of steel to achieve the highest possible stability. For detachable connection of channel struts, stabilizing straps and the like, openings and connections are only selectively present on the chamber plates and channel boards in order to avoid weakening. Due to this design and the resulting heavy weight must be taken into account that an excavator is necessary as a hoist for working with the steel chamber plate shoring and steel channel boards, because even the individual weights of people can not be handled.

In the prior art is a generic Kanaldiele WO 90/05810 A1 known. GB 1116382 A describes aluminum drive battens that are used so that adjoining drive ribs adjoin one another at their edges. Out DE 4432306 A1 are known as welded construction executed channel planks.

Against this background, the object of the invention is first of all to further develop a channel dowel of the type mentioned initially, so that in particular the described disadvantages can be avoided.

The object is achieved according to the invention in conjunction with the features that at least one cross-sectional segment at least one undercut, preferably T-profile undercut groove, which extends parallel to the plank longitudinal direction of the channel dellas and preferably continuously along the entire length of the channel dellas that for a geometric reference axis which extends in or parallel to the cross-sectional longitudinal direction through the cross-sectional center of gravity, the two resistive moments, which are the quotient of the cross-sectional area moment of inertia associated with the reference axis and each of the associated cross-sectional edge distances, are equal or substantially equal to one another and that the ratio of the cross-sectional width measured in cross-section transverse direction to the cross-sectional length measured in perpendicularly oriented cross-sectional longitudinal direction is in the value range of 0.2-0.3. The combination of these features makes it advantageous that the channel boards according to the invention, due to their versatility also simply as planks (or as aluminum planks) are to be called, even without excavator or comparable lifting means are used. On the one hand, a significantly lower weight is achieved compared to conventional steel channel boards by the use of light metal according to the invention. Thus, a channel dowel according to the invention which, for example (ie not necessary) in the plank longitudinal direction has a length of 2.5 m and in its perpendicular cross-section in the longitudinal direction 215 mm and cross-sectional transverse direction 50 mm, have a weight of only about 14 kg, the Even after the very strict health and safety regulations, for example, in Sweden may still be constantly moved by a worker. In this regard, the individual weight must be less than 16 kg. Such an aluminum plank can be adjusted and pushed by hand in the chamber plates in one of the invention preferred use for aluminum chamber lightweight construction in the chamber plates and allows, for example, build pits to 2 m depth depending on the ground without additional reinforcements. In combination with the low weight, the preferred manual handling of the channel boards according to the invention by their undercut, extending in the longitudinal direction groove (preferably T-slot) favors, which forms a ribbon. It can be used for example by means of a socket screw for clamping a sling or a handle for pressing in and pulling the aluminum plank by hand. Also, by means of the T-groove, for example, a stopper can be clamped to the channel dumbbells. The stopper can be dimensioned so large in terms of its dimensions that it protrudes beyond the edge of the chamber formed in a chamber plate and therefore can not be pushed into the chamber. In this way, the plank according to the invention can be positioned during insertion into the chamber and prevented in the chamber plate, preferably in a chamber plate according to the invention described below, from further slipping. Also, the groove according to the invention can be used as a terminal block to support the individual aluminum planks with an additional harness, which compared to known steel channel boards, which have only one hole for striking, allows greater versatility. In order to make the channel dowels according to the invention as durable as possible, they should be made of high-strength aluminum or aluminum alloy, preferably AlZn 4.5 Mg 1 according to DIN 1725 with a yield strength above 290 N / mm ² and a breaking strength above 350 N / mm ² . The channel boards according to the invention is preferably made of high strength aluminum / aluminum alloy with the strength of steel or unbreakable aluminum alloy for a long life. According to this invention according to the invention by means of the multi-function groove needs to be attached to the channel dallas / solvent aids for manual use of Verbau can be done by physical force and in this way not only on expensive hoist (eg. On an excavator with pliers), but depending on Application can be dispensed with further aids such as hydraulic vibrators.

As already mentioned, the cross-section of the channel dumbbells in the cross-sectional plane oriented transversely to its plank longitudinal direction has a plurality of cross-sectional segments oriented in different directions in this cross-sectional plane. These are preferably comparatively thin-walled cross-sectional segments in comparison to the cross-sectional dimensions in the cross-sectional longitudinal and width directions. Within the cross-sectional plane, one or more of these segments can have an almost arbitrary course, for example straight or curved, for example also rounded. In this case, the segments integrally connected to one another preferably preferably form a generally wave-like course of the channel edge profile in a broad sense of the word, wherein an essentially at least substantially rectangular waveform or trapezoidal waveform is preferably intended as the basic shape. Preferably, the wall thickness of the channel dumbbells may be on the order of a few millimeters, for example, be about 4 or 6 mm in different cross-sectional segments, but other wall thicknesses would be possible. According to the described, in cross-section wave-like profile of the channel planks, the wall extends not only in a so-called. Cross-sectional longitudinal direction, but also directed to crosswise wave or stepwise between the two profile pages repeatedly back and forth. For expedient embodiment, it is preferred that the undercut groove is provided on a cross-sectional segment extending at least substantially in or parallel to a cross-sectional longitudinal direction, which as a U-web with two cross-sectional segments forming U-legs has a first, preferably with respect to the cross-sectional longitudinal direction forms a central, substantially U-profile-like cross-sectional area, wherein the groove and the U-profile-like cross-sectional area are open to opposite profile sides. If the cross-sectional segment associated with the groove has a flat wall surface, this can serve as a guide surface when inserted into the chamber of a chamber plate. There is the possibility that the wall thickness of this cross-sectional segment is smaller than the depth of the groove provided thereon, wherein the groove depth may even be in the range of a multiple of the wall thickness. This means that the cross-sectional segment can have the said groove in the region of a projection or bulge which extends as a border of the groove from the U-web or from the corresponding cross-sectional segment into the hollow interior of the U-profile-like cross-sectional region , There is also the possibility that the cross-section in its cross-sectional longitudinal direction in the region of its two longitudinal ends each include an end-side U-profile-like cross-sectional area, wherein these two cross-sectional areas depending on a at least substantially in or parallel to the cross-sectional longitudinal direction extending U-web and two each have subsequent U-legs and the same profile or cross-sectional side are open to each other, wherein their respective, in the cross-sectional longitudinal direction of the cross-section center facing U-legs in a at least substantially in or parallel to the profile longitudinal direction extending cross-sectional segment, preferably in the U Bridge of the middle U-profile-like cross-sectional area, passes, with the free End of the respective, in the cross-sectional longitudinal direction of the cross-sectional center facing away (ie end) U-legs in a transversely to the cross-sectional longitudinal direction (ie in cross-sectional transverse direction) measured distance from the side facing away from the cross-sectional center outside of the extending substantially in or parallel to the profile longitudinal profile segment which is equal to or slightly larger than the wall thickness of the U-webs of the end-side U-profile-like cross-sectional areas. If a plurality of such rotationally symmetrical trained channel boards with alternately twisted by half a revolution cross section in a chamber of a chamber plate can be achieved by means of the end U-legs mutual positive engagement between adjacent channel boards at the same time high overlap of the end U-legs, causing the trickling For example, sand or the like can be prevented. In this way, it is possible to dispense with a filigree connection or latch formation which would be too sensitive for the preferred application to chamber plates. If the U-webs or in this respect average cross-sectional segments of the end U-profile-like cross-sectional areas profile outside have a flat wall surface, they can also serve as, the aforementioned middle leading wall surface, guide surfaces when inserted into the chamber plate. In particular, can be achieved in cross-sectional direction by suitable choice of the dimensions of a vote to the chamber width to achieve a low-play recording. The channel boards are then quasi self-centering and self-guiding in cross-sectional transverse direction or chamber width direction. In particular, such channel boards can also be used in the chamber or in the receiving gap of chamber plates, which have no separate guides for the channel boards. The aluminum planks can be set at any point in meshing with each other and are previously aligned alternately rotated by 180 ° in cross-section, thereby automatically forming an overlapping and dense Verbauwand. A compact design of the channel dowels is achieved if ever a U-leg of the aforementioned mean, substantially U-profile-like cross-sectional area at the same time forms a U-leg of one of the two end-side U-profile-like cross-sectional areas, that is identical to this. Such a configuration also advantageously allows the two moments of resistance against bending to be determined with respect to a geometric reference axis that extends in or parallel to the cross-sectional longitudinal direction through the cross-sectional center of gravity, which is the quotient of the cross-sectional area moment of inertia assigned to the reference axis and one of the assigned cross-sectional edge distances result, are equal to each other or substantially the same size. With regard to this reference axis, therefore, the so-called upper resistance moment and the so-called lower resistance moment can be practically compensated, which in turn offers advantages for the above-described alternately twisted installation of 180 °.

According to a further aspect, a chamber plate is described, preferably for a chamber plate shoring unit, comprising two parallel spaced chamber walls, for example. Planks, which bound with their facing wall surfaces a parallel surface bounded space, preferably for receiving one or more channel boards, and having on a plate side in the region of both longitudinal ends connecting means, preferably for connecting each an adjustable support strut (eg., so-called channel strut).

Such chamber plates are known in the art, as described above, as steel chamber plates, with the limitations also explained.

For advantageous development, it is proposed that the chamber plate is made of aluminum and / or aluminum alloy. This results in a lower weight, so that the chamber plate is easier to handle. An expedient development provides that the chamber walls are made of light metal (in particular aluminum or aluminum alloy) produced inside hollow box sections, as shown in more detail in the description of the figures. In this way, high stability can be achieved while maintaining low weight.

Another proposal for advantageous development of said chamber plate is that the first, the connection means facing chamber wall in the region of its two longitudinal ends each positively enters into a recess of each post and is attached thereto, that the second, the connection means facing away from the chamber wall in the area both longitudinal ends each positive fit into a recess of each support profile and is attached thereto, and that in the assembled state of the chamber plate, the two support profiles in pairs surround the two posts in sections, with holes in the support profiles and in the posts to the releasable connector, preferably by means of socket pins, overlap each other appropriately. Such a chamber plate thus has a substantially two-part structure, ie can be disassembled, so that the components can be easily transported due to their respective relatively lower individual weight. An advantage is also that such a chamber plate can be disassembled to clean the interior walls of the chamber (which may serve to receive channel boards) or to replace, for example, a damaged single wall. Preference can also here the two chamber walls, the posts and the support profiles are at least substantially made of aluminum and / or aluminum alloy, so that the chamber plate as a whole due to their low weight of people without heavy lifting means (eg. Excavator) can be handled. Especially It is preferred that in the said first, the connecting means facing chamber wall with its two posts to the EP 0 238 783 B1 known walls for digging graves. The corresponding walls of the trench shoring unit described there are spaced apart in the trench opposite one another, hollow and have inner supporting webs. Each two walls are supported by length-adjustable struts against each other and are positively inserted in the region of their transverse edges in side shoe lasts. The shoe strips, which in the sense of the present invention are the so-called posts, are composed of a U-profile and a T-shaped outgoing foot of this, whose one grabenwandseitiger T-leg in conjunction with the T-web and extending parallel to the T-leg U-web forms the recess for the entry of the partial wall transverse edge and the other T-legs extending freely in the direction away from the partial wall trench wall side, said a partial wall surface overlapping U-legs of U-profile projecting flanges or connections to attack the struts. The revelation of EP 0 238 783 B1 is hereby incorporated in full in the present application. From EP 0 238 783 B1 known chamber wall can be used either in the manner described there or as part of a chamber plate, whereby the versatility of these chamber walls increases and less storage is possible. An expedient embodiment of the chamber plate provides that the two facing each other, the space for the channel boards bordering wall surfaces have no protruding from the wall level guides for channel planks. A refinement which is advantageous with regard to the initiation and distribution of the support forces suggests that the post should have a longitudinally extending, the first chamber wall has overlapping U-profile-like connection, the U-legs of which have mutually aligned holes in pairs, and that the support profile extending in its longitudinal direction L-profile-like Having connection in the assembled state of the chamber plate with both L-limbs inside positively against the U-profile-like connection of the associated post occurs, wherein each one L-leg to the holes of the post aligned holes for releasable plug connection, in particular by means of socket pins, having. For example, one inner and one outer chamber wall can be connected and secured with four locking bolts. Alternatively or in combination, there is the possibility that the other L-leg of the L-profile-like connection of the support profile forms a U-profile-like connection for the releasable attachment of support struts by means of plug-in pins, with legs projecting at right angles or at right angles to the trench center. in that the legs projecting on the outside from the L-profile-like connection, in a projection direction transverse to the chamber plate plane, overlap in pairs with the U-legs of the post. This also has an advantageous effect on the transmission of the acting support forces and also makes it possible to work uniformly by means of a plug connection.

According to a further aspect, the invention relates to a chamber plate shoring unit comprising at least one chamber plate and one or more channel boards, wherein the chamber plate has two mutually parallel spaced chamber walls (eg planks), with their mutually facing wall surfaces a parallel surface bounded space for receiving the limit one or more channel targets.

Such chamber plate Verbaueinheiten are known from the prior art described above made of steel and have the described limitations. Against this background, the object of the invention is to further develop such a chamber-plate mounting unit, so that in particular these described disadvantages can be avoided as far as possible.

The object is achieved according to the invention in conjunction with the features that the chamber plate and the one or more channel boards are each made of aluminum and / or aluminum alloy, wherein the chamber plate Verbaueinheit has at least one channel boards according to one or more of claims 1-7. The possible effects and advantages resulting therefrom are also referred to the preceding description. Such a chamber slab shoring unit can be used, for example, for installation in building pits for house connections in sidewalks with crossing lines or, for example, in gardening and landscaping. Further exemplary applications are excavation pits for rainwater tanks or, for example, geothermal plants in loosely stored cultivated soils. In all applications, the low weight of the components makes it possible to handle these without motorized, hydraulic or the like driven lifting means, so that a Verbau example. Even in confined spaces is possible.

Preference is given to a use of the previously described chamber plates and channel boards or chamber plate Verbaueinheiten as so-called. Grabenverbau unit to support the opposing trench walls. In this case, the mutually opposite chamber plates by means of length-adjustable support struts, for example. So-called. Channel struts, connected to each other and supported against each other.

Fig. 1

perspektivisch eine erfindungsgemäße Kanaldiele gemäß einem bevorzugten Ausführungsbeispiel, bei in Dielenlängsrichtung verkürzter Darstellung;

Fig. 2

eine Draufsicht auf den Querschnitt der Kanaldiele quer zu ihrer Dielenlängsrichtung in Blickrichtung II aus Fig. 1, demgegenüber in Vergrößerung;

Fig. 3

perspektivisch eine Grabenverbau-Einheit gemäß einem ersten bevorzugten Ausführungsbeispiel;

Fig. 4

eine Draufsicht in Blickrichtung IV gemäß Fig. 3 mit zusätzlich angedeuteten Grabenwänden;

Fig. 5

einen Teilschnitt entlang Schnittlinie V - V gemäß Fig. 4, demgegenüber in Vergrößerung;

Fig. 6

perspektivisch eine Kammerplatte gemäß einem bevorzugten Ausführungsbeispiel entsprechend den Figuren 3 bis 5, jedoch demgegenüber vergrößert und verkürzt dargestellt;

Fig. 7

eine Draufsicht in Blickrichtung VII gemäß Fig. 6;

Fig. 8

perspektivisch die den Stützstreben-Anschlussmitteln zugewandte Kammerwand mit Pfosten gemäß Fig. 6;

Fig. 9

perspektivisch einen Pfosten gemäß Fig. 8, demgegenüber in Vergrößerung;

Fig. 10

eine Draufsicht auf den Querschnitt des Pfostens in Blickrichtung X gemäß Fig. 9;

Fig. 11

perspektivisch die den Stützstreben-Anschlussmitteln bzw. der Grabenmitte abgewandte Kammerwand mit ihren Stützprofilen der Kammerplatte gemäß Fig. 6 und 7, demgegenüber vergrößert und verkürzt dargestellt;

Fig. 12

perspektivisch das eine der in Fig. 11 gezeigten Stützprofile, demgegenüber vergrößert;

Fig. 13

eine Draufsicht auf den Querschnitt des Stützprofils in Blickrichtung XIII auf Fig. 12;

Fig. 14

eine Ausschnittsvergrößerung von Detail XIV aus Fig. 3, betreffend einen lösbar an der Kanaldiele befestigbaren Handgriff gemäß einem bevorzugten Ausführungsbeispiel;

Fig. 15

den lösbar befestigbaren Handgriff, aus der Nut der Kanaldiele entnommen;

Fig. 16

perspektivisch eine Grabenverbau-Einheit gemäß einem weiteren bevorzugten Ausführungsbeispiel;

Fig. 17

eine Ausschnittsvergrößerung von Detail XVII in Fig. 16;

Fig. 18

eine ausschnittsweise Draufsicht in Blickrichtung XVIII gemäß Fig. 17;

Fig. 19

eine Ausschnittsvergrößerung von Detail XIX in Fig. 16;

Fig. 20

einen Teilschnitt entlang der Schnittebene XX - XX in Fig. 19;

Fig. 21

perspektivisch ein Kopfstück, das bei der Grabenverbau-Einheit gemäß Fig. 16 als Stopper der Kanaldielen verwendet wird;

Fig. 22

eine Stirnansicht davon in Blickrichtung XXII gemäß Fig. 21, mit schematisch überlagerter Nut, in einer ersten Drehstellung und

Fig. 23

eine Stirnansicht davon in Blickrichtung XXII gemäß Fig. 21, mit schematisch überlagerter Nut, in einer zweiten Drehstellung.

The invention will be further described below with reference to the accompanying figures, which is a preferred embodiment. It shows:

Fig. 1

perspective view of a channel dowel according to the invention according to a preferred embodiment, with shortened in plank length direction representation;

Fig. 2

a plan view of the cross section of the channel dumbbings transversely to their plank longitudinal direction in the direction of II Fig. 1 in contrast, in magnification;

Fig. 3

perspective view of a trench shoring unit according to a first preferred embodiment;

Fig. 4

a plan view in the direction of IV according to Fig. 3 with additionally indicated trench walls;

Fig. 5

a partial section along section line V - V according to Fig. 4 in contrast, in magnification;

Fig. 6

perspective view of a chamber plate according to a preferred embodiment according to the FIGS. 3 to 5 , but in contrast enlarged and shortened;

Fig. 7

a plan view in the direction VII according to Fig. 6 ;

Fig. 8

in perspective, the support wall connecting means facing chamber wall with posts according to Fig. 6 ;

Fig. 9

in perspective a post according to Fig. 8 in contrast, in magnification;

Fig. 10

a plan view of the cross section of the post in the direction X according to Fig. 9 ;

Fig. 11

in perspective, the chamber wall facing away from the support strut connecting means or the trench center with their support profiles of the chamber plate according to Fig. 6 and 7 on the other hand, enlarged and shortened;

Fig. 12

in perspective, one of the in Fig. 11 shown support profiles, in contrast, increased;

Fig. 13

a plan view of the cross section of the support profile in the direction XIII Fig. 12 ;

Fig. 14

an enlarged detail of detail XIV Fig. 3 relating to a releasably attachable to the channel dumbbell handle according to a preferred embodiment;

Fig. 15

the releasably attachable handle, removed from the groove of the channel planks;

Fig. 16

in perspective, a trench shoring unit according to another preferred embodiment;

Fig. 17

a detail enlargement of detail XVII in Fig. 16 ;

Fig. 18

a partial plan view in the direction XVIII according to Fig. 17 ;

Fig. 19

a detail enlargement of detail XIX in Fig. 16 ;

Fig. 20

a partial section along the section plane XX - XX in Fig. 19 ;

Fig. 21

in perspective, a head piece, which in the trench shoring unit according to Fig. 16 is used as a stopper of the channel boards;

Fig. 22

an end view thereof in the direction of XXII according to Fig. 21 , with schematically superimposed groove, in a first rotational position and

Fig. 23

an end view thereof in the direction of XXII according to Fig. 21 , with schematically superimposed groove, in a second rotational position.

In the FIGS. 1 and 2 an inventive channel boards 1 according to a preferred embodiment is shown. In the example chosen, its length in plank lengthwise direction D is 2.5 m, but could also be longer or shorter (for example, 1 m or 2 m in length). The example chosen is an extruded profile. FIG. 2 shows the view of a perpendicular to the plank longitudinal direction D cross-sectional plane. Therein, the cross section of the channel planks 1 comprises a plurality of cross-sectional segments, which are initially provided uniformly with the reference numeral 2. As can be seen, these extend as rectilinear wall sections in mutually different directions of the cross-sectional plane and merge into one another at their ends, that as a whole results in the profile wave-like, in the example trapezoidal, cross-section of the channel boards 1. In the example, the cross-sectional length a in the longitudinal direction of the cross-section L is 215 mm and the cross-sectional width b measured perpendicular thereto, ie in cross-sectional transverse direction Q, is 50 mm. Thus, in the example, the ratio of cross-sectional width b to cross-sectional length a of 0.23 is about 1/4. This ratio is significantly greater than the ratio of cross-sectional width to cross-sectional length typically encountered with steel channel boards (in practice the dimension referred to herein as the cross-sectional length is also referred to as the so-called profile width and the dimension referred to herein as the cross-sectional width is referred to as the so-called profile height). For steel sheet piles, this ratio is typically in the range of 0.11 to 0.14. Consequently, the channel boards according to the invention also go with respect to this dimension ratio deviates from steel channel boards, thus new way. Practice shows that in particular a preferred ratio of cross-sectional width b to cross-sectional length a of about 0.25 (or as indicated slightly smaller or larger) advantageous in terms of a very easy to handle and at the same time well extrudable channel boards made of aluminum or aluminum alloy with high Bending resistance is. It is understood that, however, deviating dimensions and dimensions ratios are possible. In the example, the aluminum alloy AlZn4.5Mg1 was chosen as the material for the channel boards 1, so that the channel boards only have a low weight of 5.6 kg per m. In relation to the cross-sectional longitudinal direction L middle layer of Kanaldielenquerschnitt comprises a cross-sectional segment 3, which in turn has an undercut in the middle of an undercut T-profile-like groove 4. According to FIG. 1 The groove 4 extends parallel to the plank longitudinal direction D along the entire length of the channel planks 1. The groove 4 divides the cross-sectional segment 3 into two segment sections of equal length to both groove sides. The undercut, ie wider in width relative to the groove opening enlarged groove cross-section is bounded by a wall 5, which forms a protrusion 6 projecting from the cross-sectional segment 3.

How the particular FIGS. 14 and 15 By way of example, the groove 4 can serve as a multifunctional connection for the detachable fastening of various desired aids by means of a plug screw 7, the screw head 8 of which can be inserted into the groove 4 in a rotationally positive manner from the end faces, ie, can not be rotated therein. The screw shaft 9 passes through a hole in a leg 10 of an L-profile-like holding part 11 and through the groove opening out of the groove 4 to the outside. On the screw shaft 9 connected to a handwheel 12 bolt 13 is screwed with endseitigem support ring 14. For attachment, the screw head 8 according Fig. 14 inserted from above into the groove 4, wherein the leg 10 is seated on the cross-sectional segment 3. If the handwheel 12 is rotated, the push-in screw 7 can not follow the rotation, so that finally the support ring 14 presses the holding part 11 against the channel planks 1 and thus connects. With the handle 15 attached to the holding member 11, the channel boards 1 can be easily raised or lowered by a person. If, not deviating from the example, no angular, but provided, for example, a flat holding part, an aid can be attached to practically any position of the groove 4 and then released again. For example. could also be completely dispensed with the holding part 11 and by means of the plug screw 7 only the aid formed from handwheel 12, pin 13 and support ring 14 are clamped in any groove position, for example. To form a so-called. Stopper when inserting into a chamber plate ( see below) forms a stop and prevents slippage of the channel boards 1. In the reverse insertion position in a chamber plate, ie not pointing to Grabenmitte slot opening, it can, for example, an additional strapping be clamped.

The adjacent to the groove 4 cross-sectional segment 3 forms in the in FIG. 2 profile cross-section shown as a U-web 3 'with two end-connected, also provided with the reference numeral 16 cross-sectional segments, the U-legs 16' form, a first, with respect to the cross-sectional longitudinal direction L middle, substantially U-profile-like cross-sectional area 17. In In the example, ie not necessary, is the wall thickness c of the cross-sectional segments extending substantially in the profile transverse direction Q 4mm and the wall thickness d of the cross-sectional longitudinal direction L extending cross-sectional segments 6mm and the depth t of the undercut groove cross section 11mm. The FIGS. 1 . 2 also show that the cross section of the channel boards 1 in its cross-sectional longitudinal direction L in each case comprises an end-side U-profile-like cross-sectional area 18 in the region of its two longitudinal ends. Both cross-sectional areas 18 each have an at least substantially parallel to the cross-sectional longitudinal direction L extending U-web 19 'and two adjoining U-legs 20' and are open to the same profile side as the groove 4. It is clear from the above that the respective U-limb 20 'of the end-side cross-sectional regions 18 facing the middle of the profile is identical, ie identical, to one of the U-legs 16' of the middle cross-sectional region 17. The respective free end 21 of the end U-legs 20 'is located in a cross-sectional transverse direction Q measured distance e from the outside of the profile segment 3. In the example, ie not necessary, the distance e is 6mm, ie corresponds to the wall thickness d of the U- Webs 19 'of the end U-profile-like cross-sectional areas 18. this allows an overlapping engagement of adjacent channel boards in a chamber plate in which the U-webs of the various channel boards are aligned longitudinally. Also is in Fig. 2 a geometric reference axis 22 is shown, which is parallel to the cross-sectional longitudinal direction L through the cross-sectional center of gravity S extends. The profile cross-section of the channel boards is designed or dimensioned such that the two resistance moments against bending, as a quotient of the reference axis 22 associated area moment of inertia and each one of the associated cross-sectional edge distances 23, 24 result, are approximately equal to each other by these example. Value wise have a relative deviation of, for example. Only 5% to 10%.

With reference to the FIGS. 3 to 5 a trench shoring unit 25 according to a preferred embodiment is presented. This comprises two mutually parallel spaced chamber plates 26, which are identical to each other and supported by means releasably attachable thereto support struts 27 against each other. Each chamber plate 26 comprises two mutually parallel spaced chamber walls 28 and 29. The respective first chamber wall 28 is inside, ie facing the connection means 31 for the support struts 27, and the respective second chamber wall 29 is outside, ie facing away from the trench center. The more detailed construction of the chamber plates 26 is for the selected embodiment in the FIGS. 6 and 7 shown. The facing each other in the chamber wall surfaces 28 ', 29' define a parallel surface a gap 30 which is suitable for receiving a plurality of channel boards 2. In the FIGS. 6 and 7 is the chamber plate 26, characterized by the imaginary departure, shown shortened. In the region of both longitudinal ends are connecting means 31 for height-selectable, detachable connection of the support struts 27th

How special the FIGS. 8 to 10 illustrate the chamber wall 28 in the region of its two longitudinal ends each form-fitting manner in a recess 32 each of a post 33. In the example, the chamber wall 28 is composed of a respective upper and lower partial wall 34, which in each case with extruded box sections made of aluminum that shown by means of the departure inside hollow cross-section is. In this case, the parallel profile walls on box inside extending support ribs 35 in conjunction. The longitudinal edges of the partial walls 34 form on one side a groove 36 and on the other Side of a spring 37, which are each designed to be roof-shaped, so that at the butt joint 38 a stabilizing engagement is formed. The two partial walls 34 are fixedly attached to the posts 33 by means of welds 39, respectively. In the example chosen, the walls 28 and 29 are made of the aluminum alloy AlMgSi1. The posts 33 are made in the example of the aluminum alloy AlZn4.5Mg1.

According to the FIGS. 11 to 13 In the region of its two longitudinal ends of the chamber wall 29 is in each case positively inserted into a recess 42 each have a support profile 43, both partial walls 40 each by means of welds 39 at the support profile 43 are firmly attached. The chamber wall 29 has a slightly greater length compared to the chamber wall 28.

In the in the FIGS. 6 . 7 shown assembled state of the chamber plate 26 engage around the two support sections 43 in pairs the two posts 33 sections. The orientation in the vertical direction is chosen so that holes 44 in the support profiles 43 and holes 41 in the posts 33 match each other in aligned overlap, so that can let the support profiles and posts by means of locking pins 45 releasably connect to each other (see. FIGS. 6 and 7 ). In the example chosen, the support profile is made of the aluminum alloy AlMgSi1F28. Especially the FIGS. 8 to 10 illustrate that each post 33 has a extending in its longitudinal direction, the chamber wall 28 overlapping U-profile-like connection 46 also U-profilartigem cross-section, both U-legs 47 have the pairs aligned holes 41. The FIGS. 11 to 13 illustrate that each support profile 43 has an extending in its longitudinal direction L-profile-like connection 48, which in the assembled state of the chamber plate (see. FIGS. 6 and 7 ) with his two L-thighs 49, 50 inside positively against the U-shaped connection 46 of the post 33 occurs. The extending transversely to the chamber wall plane L-leg 50 has spaced apart in the vertical direction of holes 44 which are in the mounting position to the vertically spaced apart holes 41 of the post 33 in alignment with the releasable connector by means of in FIG. 6 . 7 shown locking pin 45th

At the in FIG. 7 shown mounting situation is still another support between post 33 and support profile 43 recognizable. This takes place on the part of the support profile 43 in the region of a throat 51, which is formed between a wall 52 extending from the recess 42 and extending transversely to the chamber wall plane and a wall 53 oriented diagonally inwards in cross section. On the part of the post 33, this system takes place at the free end 54 of a beyond the longitudinal end of the chamber wall 28 also flying freely in the longitudinal direction extending wall 55. Furthermore show the FIGS. 6 and 7 in that the other L-leg 49 of the connection 48 forms the U-profile-like connection 57 for the detachable fastening of the support struts 27, with legs 56 projecting at right angles from the outside. In the in FIG. 7 shown mounting position, the U-legs 56 occur in a direction transverse to the chamber wall plane projection in pairs in overlap with the U-legs 47 at the terminal 46 of the post 33rd FIG. 7 Figure 4 also shows that the two facing wall surfaces 28 'and 29' overlie the gap 30 in parallel, with no guides for channel boards 1 projecting beyond these wall surfaces 28 'and 29', but the wall surfaces 28 ', 29' are smooth. The support struts 27 each have at their two longitudinal ends a U-profile 58. In each of its two legs 59, a bore 60 is provided, which are aligned in pairs. The inner cross section of the U-profile 58 is adapted in terms of dimensions to a low-play encompassing of the terminal 31 on the support section 43. Both legs 56 of the terminal 57 and the connecting means 31 have vertically spaced holes 61st on, which are aligned in pairs between the two legs 56 to each other. To attach a support strut 27 to the terminal 57 of a chamber plate 26, the two holes in the U-profile 27 in the desired mounting height with two holes 61 are brought into alignment overlap and plugged through a pin 62 to secure this position, as for example. In FIG. 4 is shown.

Will the in FIG. 6 illustrated chamber plate 26 supplemented by one or more channel boards 1, this forms a so-called. Chamber panel installation unit. From two such chamber plate shoring units and two support struts 27 is in FIG. 3 shown trench assembly unit 25 formed. FIG. 5 schematically shows that the channel boards 1 can extend with its lower edge to below the lower edge of the chamber plate 26 to accompany the trenching step by step. In the top view of FIG. 4 is indicated schematically that the width of the formed in the chamber plates 26 spaces 30 is only slightly larger than the width of the channel boards 1 is selected. For example, the channel boards 1 have a width of 50mm and the gaps 30 have a width of 55mm. In the components described above is in terms of their choice of material and their low weight also speak of a chamber plate lightweight construction.

Fig. 16 shows a second preferred embodiment of a turn designated by the reference numeral 25 trench assembly unit, in which also the respective to previous figures the same or corresponding components have been given the same reference numerals. In Fig. 16 the trench shoring unit serves for the lateral support of a trench extending in the longitudinal direction of a first pipe 63, wherein the earth adjoining the chamber plates 26 and the channel boards 1 to the outside is not shown. Transverse to the longitudinal axis of the first tube 63, a second tube 64 extends, which thus also at right angles through the trench. To the support To adapt the trench thereto, on both trench sides or on both chamber plates in each case a limited number of located in a vertical projection above the pipe 64 channel boards 1 only to a correspondingly lower depth than the adjacent to both sides pipe channel boards in the chamber plates 26. In this case, both the completely and the partially used channel boards 1 correspond in terms of construction and nested arrangement of the embodiment described with reference to the preceding figures. It can be seen that in each chamber plate three mutually engaged channel boards 1 are only used up to the shown comparatively smaller depth in the chamber plates 26. In order to prevent further lowering down, a so-called. Head piece 65 is clamped in the groove 4 of the channel dumbbings at correspondingly suitable longitudinal position, so that it is due to its lateral projection on the top of each associated chamber plate 26 at each of these channel boards supported. Fig. 16 shows that, according to the nested interlocking in the viewing direction front chamber plate 26, the two edge side of the affected three channel boards 1 with its groove 4 and consequently with the head piece 65 to the trench outer side, while the groove 4 of the central channel boards 1 with its head 65th to the ditch center points. In the direction of the rear chamber plate this is reversed.

From the FIGS. 20 to 23 the construction and the function of the head piece 65 becomes clear. This has a (except for extending in the longitudinal direction profile ribs 66) about the longitudinal center axis rotationally symmetrical housing 67. In the ribs 66 this (apart from the ribs itself) is cylindrical and in an adjoining longitudinal section 68 to its longitudinal end (69) conically tapered. From the end face of the longitudinal end 69 extends in the longitudinal direction a cross-sectionally hexagonal bore 70 up to about half the depth into the housing 65 and there goes over into a reduced circular cross-section through hole 71. Into the hole 70 is a cross-section adapted, ie in the circumferential direction positively engaging hex nut 72 pushed up against the stop formed by the bore taper. From the opposite end face a plug screw 7 is screwed into the hex nut 72. The head 8 of the screw 7 has the in the FIGS. 21 to 23 shown cross-sectional shape, with each other two comparatively longer longitudinal sides in a comparatively smaller distance and two perpendicular, relatively shorter longitudinal sides 74 with respect to each other at a relatively greater distance with respect to the longitudinal center. The two shorter longitudinal sides are rounded against each other diagonally opposite edge regions 75. In the in Fig. 21 The arrangement shown, the head piece 65 with the screwed therein screw 7 with the head position according to Fig. 22 starting from a front side inserted into the groove 4 of a channel boards 1. In this case, the channel dumbbells 1 is held in the desired height for fixing in the chamber plate 26 and pushed the head piece 65 until it rests against the top of the chamber plate. At this position, the housing 67 is gripped and rotated, so that the plug screw is screwed deeper until the end face 75 is clamped against the channel boards 1 and the head piece 65 is thereby fixed in this position. In the course of tightening the head is 8 of the in Fig. 22 shown position in which the screw 7 can be easily moved in the groove 4, automatically in the in Fig. 23 shown rotated rotational position, in which a particularly high clamping force results.

Another difference of in Fig. 16 shown trench assembly unit 25 compared to Fig. 3 lies in the fact that the channel boards 1 below the chamber plates 26 facing the trench center with each one perpendicular to them, ie, parallel to the trench direction, running formwork beams 76 are connected. The relevant attachment is particularly of the Figures 17 and 18 illustrated. As an aid to serve clamping pieces 77, which consists essentially of a bent sheet metal piece 78 with a central bore and a therein inserted from the concave side plug screw 7, which the in Fig. 21 shown or may have a comparable head shape, are formed. For assembly, the plug screw 7 is inserted with its head into the groove 4 until a narrow side of the sheet metal piece 28, which extends transversely to the curvature of the sheet, a protruding edge edge 79 of the formwork support 76 engages over. On the free end of the plug screw 7, a wing nut 80 (or the like) is screwed until the desired clamping action is created. In the narrow edge surfaces of the formwork support 76 extends in the longitudinal direction of a T-profile-like groove 81, whose cross section corresponds to the grooves 4. In it also clamping pieces 77 are inserted, so that the sheet metal pieces 78 engage over an L-profile-like mounting flange of another, adjustable by means of threaded engagement in their length channel strut 83. By means of this arrangement described or Gurtung the wall formed from the channel boards 1 can be supported below the chamber plates 26 against the opposite channel wall panel. The formwork support 26 may be made of light metal, preferably made of aluminum or aluminum alloy.

Claims (14)

1. Trench sheet (1), in particular for a chamber plate trench shoring unit, the cross section of the trench sheet having, in a cross-sectional plane that is oriented transversely to the longitudinal direction of said sheet, a plurality of cross-sectional segments that are oriented in different directions in the cross-sectional plane, the trench sheet (1) being made at least substantially of aluminium and/or an aluminium alloy, characterised in that at least one cross-sectional segment (3) comprises at least one groove (4) that is undercut, in particular undercut in the shape of a T, and extends in parallel with the longitudinal direction (L) of the trench sheet (1) and in particular continuously along the entire length of the trench sheet (1),
   in that, for a geometric reference axis (22) that extends through the cross-sectional centre of gravity (S) in or in parallel with the longitudinal cross-sectional direction (L), the two section modulus values that result as a quotient from the cross-sectional geometrical moment of inertia that is associated with the reference axis (22) and in each case from one of the associated cross-sectional edge distances (23, 24) are equal or substantially equal,
   and in that the ratio of the cross-section width (b), measured in the transverse cross-sectional direction (Q), to the cross-section length (a), measured in the longitudinal cross-sectional direction, which is oriented transversely to the cross-section width, is in the range of values of 0.2-0.3.
2. Trench sheet (1) according to claim 1, characterised in that the ratio of the cross-section width (b), measured in the transverse cross-sectional direction (Q), to the cross-section length (a), measured in the longitudinal cross-sectional direction (L), which is oriented transversely to the cross-section width, is approximately 0.25, in particular 0.23 or 0.24.
3. Trench sheet according to one or more of the preceding claims, characterised in that one or more aids, such as slings, handles (15), stoppers or binding means, are provided to be detachably fastened to the groove (4) by means of a bolt (7).
4. Trench sheet according to one or more of the preceding claims, characterised in that the groove (4) is provided on a cross-sectional segment (3) that extends at least substantially in or in parallel with a longitudinal cross-sectional direction (L) and forms a first substantially U-shaped cross-sectional region (17), which is in particular central with regard to the longitudinal cross-sectional direction, as a U-web (3') having two cross-sectional segments (16) that are connected thereto and that form U-legs (16'), the groove (4) and the U-shaped cross-sectional region (17) being open towards opposing profile faces.
5. Trench sheet according to one or more of the preceding claims, characterised in that the wall thickness (d) of the cross-sectional segment (3) is less than the depth (t) of the groove (4) that is provided thereon, and a wall (5) of the groove (4) extends into the interior of the U-shaped cross-sectional region (17) as a projection (6) from the U-web (3').
6. Trench sheet according to one or more of the preceding claims, characterised in that the cross section has, in the longitudinal cross-sectional direction (L) thereof, a U-shaped cross-sectional region (18) at the end in the region of the two longitudinal ends thereof in each case, said two cross-sectional regions (18) each comprising a U-web (19') that extends at least substantially in or in parallel with the longitudinal cross-sectional direction and each comprising two U-legs (20') that connect to the web in each case and are open towards the same profile face, each U-leg (20') thereof that faces the cross-sectional centre in the longitudinal cross-sectional direction (L) transitioning into a cross-sectional segment (3) that extends at least substantially in or in parallel with the longitudinal cross-sectional direction (L), in particular into the U-web (3') of the central, U-shaped cross-sectional region (17), the free end of each U-leg (20') that faces away from the cross-sectional centre in the longitudinal cross-sectional direction (L) being located at a distance (e), measured transversely to the longitudinal cross-sectional direction, from the outer side, facing away from the cross-sectional centre, of the cross-sectional segment (3) that extends substantially in or in parallel with the longitudinal cross-sectional direction (L), which distance is equal to or somewhat greater than the wall thickness (d) of the U-webs (19') of the U-shaped cross-sectional regions (18) at the ends.
7. Trench sheet according to one or more of the preceding claims, characterised in that each U-leg (16') of the central, substantially U-shaped cross-sectional region (17) simultaneously forms a U-leg (19') of one of the two end U-shaped cross-sectional regions (18).
8. Chamber plate trench shoring unit, comprising at least one chamber plate and one or more trench sheets, the chamber plate (26) comprising two chamber walls (28, 29) that are mutually spaced and in parallel with one another, the mutually facing wall surfaces (28', 29') of which define a space (30) bordered in a plane-parallel manner for receiving the one or more trench sheets (1), characterised in that the chamber plate (26) and the one or more trench sheets (1) are in each case made of aluminium and/or an aluminium alloy, the chamber plate trench shoring unit comprising at least one trench sheet (1) according to one or more of claims 1-7.
9. Chamber plate trench shoring unit according to claim 8, characterised in that the chamber plate (26) comprises connecting means (31) on a plate face in the region of the two longitudinal ends for connecting a longitudinally adjustable supporting strut (27) in each case.
10. Chamber plate trench shoring unit according to claim 9, characterised in that the chamber plate (26) comprises two chamber walls (28, 29) that are mutually spaced and in parallel with one another, the mutually facing wall surfaces (28', 29') of which define a space (30) bordered in a plane-parallel manner, in particular for receiving one or more trench sheets (2), the first chamber wall (28), which faces the connecting means (31), form-fittingly entering, in the region of the two longitudinal ends thereof, a recess (32) in a post (33) in each case and being fastened thereto, in that, in the region of the two longitudinal ends thereof, the second chamber wall (29), which faces away from the connecting means, form-fittingly enters a recess (42) in a support profile (43) in each case and is fastened thereto, and in that, when the chamber plate (26) is assembled, the two support profiles (43) encompass the two posts (33) in portions in pairs, bore holes (44, 41) in the support profiles (43) and in the posts (33) overlapping so as to line up for the purpose of detachable insertion connection, in particular by means of locking pins (45).
11. Chamber plate trench shoring unit according to claim 10, characterised in that the two chamber walls (28, 29), the posts (33) and the support profiles are made of aluminium and/or an aluminium alloy.
12. Chamber plate trench shoring unit according to one or more of claims 8 to 11, characterised in that the two mutually facing wall surfaces (28', 29') that border the space (30) for the trench sheets (1) do not comprise any guides, projecting from the wall plane, for trench sheets (1).
13. Chamber plate trench shoring unit according to either claim 10 or claim 11, characterised in that the post (33) comprises a U-shaped connector (46) that extends in the longitudinal direction of the post and overlaps the first chamber wall (28), the U-legs (47) of which connector comprise bore holes (41) that are in alignment with one another in pairs, and in that the support profile (43) comprises an L-shaped connector (48) that extends in the longitudinal direction of the profile, and the two L-legs (49, 50) of said connector form-fittingly come to rest against the U-shaped connector (46) of the post (33) on the inside when the chamber plate is assembled, one L-leg (50) comprising bore holes (44) that are in alignment with the bore holes (41) in the post (33) for the purpose of detachable insertion connection, in particular by means of locking pins.
14. Chamber plate trench shoring unit according to claim 13, characterised in that legs (56) that project at right angles from the outside of the other L-leg (49) of the L-shaped connector (48) form a U-shaped connector (57) for detachably fastening supporting struts (27), in particular the legs (56) that project from the outside of the L-shaped connector (48) overlapping the U-legs (47) of the post (33) in pairs in a direction of projection in parallel with the plane of the chamber plate.

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