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WO1997017497A1 - Procede et dispositif pour compacter le sol - Google Patents

Procede et dispositif pour compacter le sol Download PDF

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Publication number
WO1997017497A1
WO1997017497A1 PCT/EP1996/003774 EP9603774W WO9717497A1 WO 1997017497 A1 WO1997017497 A1 WO 1997017497A1 EP 9603774 W EP9603774 W EP 9603774W WO 9717497 A1 WO9717497 A1 WO 9717497A1
Authority
WO
WIPO (PCT)
Prior art keywords
milling
arm
soil
tools
milling arm
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP1996/003774
Other languages
German (de)
English (en)
Inventor
Helmut Schönberger
Edmund Krauter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sidla und Schonberger Erdbaugesellschaft Mbh
Original Assignee
Sidla und Schonberger Erdbaugesellschaft Mbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19542031A external-priority patent/DE19542031B4/de
Application filed by Sidla und Schonberger Erdbaugesellschaft Mbh filed Critical Sidla und Schonberger Erdbaugesellschaft Mbh
Publication of WO1997017497A1 publication Critical patent/WO1997017497A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2/00—General structure of permanent way
    • E01B2/006—Deep foundation of tracks
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/13—Foundation slots or slits; Implements for making these slots or slits
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/18—Bulkheads or similar walls made solely of concrete in situ
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/08—Dredgers; Soil-shifting machines mechanically-driven with digging elements on an endless chain
    • E02F3/10—Dredgers; Soil-shifting machines mechanically-driven with digging elements on an endless chain with tools that only loosen the material, i.e. with cutter-type chains
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/08—Dredgers; Soil-shifting machines mechanically-driven with digging elements on an endless chain
    • E02F3/12—Component parts, e.g. bucket troughs
    • E02F3/14—Buckets; Chains; Guides for buckets or chains; Drives for chains
    • E02F3/143—Buckets; Chains; Guides for buckets or chains; Drives for chains chains; chain links; scraper chains
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/16—Cabins, platforms, or the like, for drivers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
    • E02D3/123—Consolidating by placing solidifying or pore-filling substances in the soil and compacting the soil

Definitions

  • the invention relates to a method and a device according to the preamble of claim 1 or 13.
  • a known measure for soil consolidation consists in introducing a soil consolidation agent under pressure by means of lances introduced into the soil at intervals, which penetrates into the soil and into the layer to be consolidated and solidifies in the course of curing.
  • This injection technique has good success per se, but it is insufficient because the injection substances injected under pressure move into the areas of the soil where the flow resistance is low.
  • certain solidified and coherent parts of the soil are not penetrated by the injection compound.
  • These initially hard and solid parts of the soil can lose their strength and become unstable in the course of time as a result of erosion processes due to the penetration of water or biological effects (humic acids). These areas, which are not penetrated by the injection material, thus prove to be long-term sources of danger.
  • the soil provided for consolidation is torn open, crumbled and mixed on the spot with cement and possibly water by means of a device traveling over it.
  • This known method is very labor intensive and energy-intensive, because when the soil is torn open and crumbled and at the same time mixed with cement, a large soil resistance has to be overcome and thus a high power consumption is achieved.
  • the known method is not suitable for deeper soil areas, because tearing and crumbling and mixing in deeper soil areas is hardly possible.
  • Another known method for ground fastening is the so-called central mixed method (mixed-in-plant).
  • the soil is mixed with the cement and the required water in a stationary mixing plant.
  • it is necessary to lift the soil, to transport it to the mixing plant arranged next to the area of the soil to be consolidated and to transport it back again.
  • a method similar to the central mixing method and an associated device are described in DE 31 27 350 C2 as an exemplary embodiment.
  • the ground is excavated with an excavator and placed next to the ground area that is to be solidified.
  • the excavated material is sprayed with a liquid cement that is brought to the construction site in a tanker truck.
  • the excavation is crushed or crushed with the shovel of the excavator, so that individual solid components of the excavation disintegrate and the cement liquid completely soaks the excavation.
  • the excavated soil material is then filled back into the excavation pit with the excavator to form a solid floor.
  • the central mixing method and the above-described further method are also complex since the excavated soil has to be conveyed, mixed and returned over a considerably long distance. This also requires a large amount of space, which is not always available.
  • the arrangement of the mixing stations creates a large construction site, which adversely affects the environment, because the mixing stations at least deface the vicinity of the area in which the soil is to be solidified, and therefore a renovation of the surrounding area is necessary. As a result, the cost of these known methods is also considerably high.
  • DE-A-731 945 describes a device for soil stabilization, which has a trench cutter with a milling arm protruding into the soil and with an on Has arranged on the milling arm all-round mounted blades with which the ground is excavated and laterally requested.
  • the excavated trench is located behind the milling arm, which is expanded against laterally collapsing soil by means of removal shields which can be moved forwards with the milling arm.
  • the trench is crumbled with concrete, which is supplied by means of a feed device.
  • This known device is expensive, inter alia, because of the arrangement of the removal shields and complex to manufacture and, on the other hand, due to the friction between the removal shields and the base supported thereby, a relatively large propulsive force is required, as a result of which a large amount of energy is also required.
  • Another disadvantage is that, despite the presence of the removal shields, settling of the floor can hardly be completely prevented, because when the removal shields are pulled, the floor can relax in the free space of the pulled removal shields. Since this device is set up to remove the excavated soil and fill the trench with concrete, a considerable amount of soil and filler mass is also prescribed, which is also complex and time-consuming. This known device and the associated procedure are therefore un economical.
  • DE-A-19 02 138 describes a method and a device for the production of underground structures, in particular of waterproof sealing aprons as well as foundations and walls.
  • the soil material loosened during the execution of the narrow trench is mixed with a clay water or cement water suspension and the liquid sealant thus produced is deposited again in the trench, which is done by flushing.
  • These measures are carried out below a level of the clay water-cement suspension, from which the soil components settle down behind the milling arm.
  • the suspension is supplied by means of two feed pipes which, in the exemplary embodiment, open into the movement area of blades in the upper end region of the milling arm, which are supported on the milling arm by a chain.
  • the feed pipe arranged at the front is located in a low trench extending in the plane of advance of the milling arm.
  • the invention is based on the object of developing a method and a device of the types specified at the outset so that settling is largely avoided while ensuring a good mixing of the soil with the solidifying agent and satisfactory performance.
  • the soil stabilization agent is introduced on the one hand in the lower region of the milling arm and on the other hand in the space delimited by the rotating milling tools.
  • the soil stabilizer can be mixed intensively with the soil detached from the milling tools. This is determined by the fact that the circulation of the detached soil takes place in this space and the mixing takes place intensively and in addition in a simple manner.
  • the mixing extends at least with a milling arm of shorter length over the entire immersion depth of the milling arm, so that despite the Introducing the soil stabilizer only in the area of the lower half or in the lower area of the milling arm, the detached soil is thoroughly mixed in the area of the entire immersion depth.
  • the introduced soil stabilizer can namely spread up and down from the associated feed outlet up and down to acceptable lengths, which contributes to the good mixing.
  • the walls of the ground adjacent to the side of the milling arm are supported by the mixed soil, namely in the area of the space delimited by the rotating milling tools by the mixing column located therein and behind the milling arm by the mixing column exiting to the rear during propulsion.
  • the cavity released by the at least one spar of the milling arm during propulsion is filled in by a bagging mixture, so that the bottom side walls are also provided with good support here. Since this aforementioned cavity is located directly behind the milling arm and the range of motion of the milling tools, this sagging of the column of the soil mixture column takes place forcefully.
  • the consistency of the mixture should be aimed at such that the mixture is directly behind the milling arm or after a short time of a few minutes, e.g. five minutes, can be walked on by one person without significant sags.
  • a dry e.g. add a granulated or powdered soil stabilizer.
  • This measure leads to a consistency of the mixture in the space delimited by the rotating milling tools and also behind it, which can be described as earth-moist, since the moisture present in the soil or pore water present in the soil or possibly existing groundwater can be used for the mixture. With this measure, the support of the side walls of the floor is very good.
  • the device according to the invention according to claim 13 enables the method to be carried out and is characterized by a simple, inexpensive to manufacture and safely functioning design, with which the advantages described above can also be achieved. Furthermore, the invention relates to an advantageous method of improving a soil in several rows of jacking arranged side by side. These measures are particularly suitable for ground consolidation of both strip-shaped or block-shaped ground parts and underground subsurface layers, and are therefore particularly suitable for the rehabilitation or foundation of routes for roads and railways. These measures are also suitable for block or strip foundations.
  • the method and the device according to the invention can be used very advantageously for securing an excavation pit slope, namely in that a solid ground strip forms this securing means, the excavation pit being able to be excavated within this solid ground strip.
  • Another advantageous application is the renovation of dykes or dams by attaching a sealing apron in the form of a solidified floor strip, which, depending on the material structure of the dike or dam, can be laid out on the inside, in the middle or on the outside and can also have a considerable depth.
  • a sealing apron in the form of a solidified floor strip, which, depending on the material structure of the dike or dam, can be laid out on the inside, in the middle or on the outside and can also have a considerable depth.
  • the subclaims contain features which improve the method and the construction and in particular enable a small, stable construction with a large depth of immersion in the ground and facilitate propulsion in the ground, which improve the mixing of the ground, and which adjust the working range of the device from the side enable and improve their controllability and direction control.
  • Figure 1 shows a device for ground stabilization according to the invention in side view.
  • Figure 2 shows the device in plan view. 3 shows a milling arm of the device in the working position in a side view and in a somewhat enlarged representation; 4 shows the detail marked X in FIG. 1 in an enlarged representation; 5 shows the detail marked Y in FIG. 1 in an enlarged representation; 6 shows a view corresponding to FIG. 2 of a modified device for lower immersion depths; 7 shows a milling tool attached to a milling chain in a side view; 8 shows a modified milling tool in a vertical longitudinal section of the milling chain; 9 shows the milling tools according to FIGS. 7 and 8 in plan view;
  • FIG. 11 shows the partial section XI-XI in FIG. 8.
  • the main parts of the device for soil improvement are a chassis 2, each with at least two side wheels or two side drive chain arrangements 3 with rotating drive chains 3a, a milling arm 4, which is connected by a joint arrangement 5 at its rear end to the front end region of a structure 6 of the chassis 2 is vertically pivotally connected, a feed device 7 for a soil stabilizer and a control station 8 arranged on the chassis 2, in particular on the body 6, which is arranged at the rear end of the body 6 in the prevailing configuration.
  • the soil stabilizer is supplied to the feed device 7 in a substantially ready-to-use condition, e.g. by means of a preparation or mixing device for the soil stabilizing agent, which can be located on the structure 6 or also next to the device 1 as an aggregate which is arranged and advanced separately from the latter.
  • the length L of the milling arm 4 is dimensioned somewhat larger than the desired depth T up to which the base 9 is to be consolidated.
  • the effective width b of the milling arm 4 is smaller than the width B of the device 1 or the chassis 2, but it is also possible that the width b can approximately correspond to the width B. In the present embodiment, the width b is approximately one third of the width B.
  • the milling arm 4 is mounted on the structure 6 so that it can be pivoted vertically by means of a double joint and an auxiliary arm 11.
  • the auxiliary arm 11 In contrast to the milling arm 4, around which one or two milling chains 12 arranged alongside one another along its approximately entire length, with milling tools 13 attached to it at intervals, can be driven in a circumferential manner, the auxiliary arm 11 merely serves to hold the milling arm 4 in the sense of a toggle lever arm and to bridge it a forward distance a of the body 6 from the rear end of the crawler belt assemblies 3. Therefore, the length L1 of the auxiliary arm 11 is dimensioned somewhat larger than the distance a.
  • the milling arm holder 14 for holding the generally designated 15, formed by the auxiliary arm 11 and the milling arm 4 Fräsa ⁇ nvoriques is releasably and interchangeably attached to the structure 6, so that milling arm devices 15 of different lengths L and / or width b are optionally attachable, one or several milling arm devices 15 can belong to device 1.
  • the milling arm device 15 is horizontally adjustable laterally or transversely by an adjusting device 16 and is arranged in the respective adjustment position on the structure 6.
  • Such a configuration basically makes it possible to stand and position the milling arm device 15 laterally, e.g. in adaptation to a floor strip solidified by a previous work step.
  • the milling arm 4 is dimensioned narrower than the width B of the device 1, it is also possible to state the position of the milling arm device 15 in the region of the width B.
  • the lateral adjustment range for the milling arm device 15 can be dimensioned so large that the milling arm 4 is aligned in the side adjustment end position with the associated side surface of the device 1, projects beyond it, or has an inward distance from its alignment.
  • the adjusting device 16 has a horizontal transverse guide 17, in which the milling arm holder 14 of the milling arm device 15 can be understood horizontally and can be locked in the adjusted adjustment position.
  • the transverse guide 17 has two ones, which are at a vertical distance b from one another Guide cross rods 19, which are overlapped and engaged by a guide shaft 21, which is preferably part of the milling arm holder 14, the guide cross rods 19 being fastened to the front of the structure 6, preferably by means of vertically arranged fastening plates 22, 23.
  • the guide transverse rods 19 have a square, in particular rectangular, cross section.
  • the guide slide 21 is U-shaped with a slide base part 24, from the upper and lower ends of which slide leg parts 25 with guide recesses 26 of a cross-sectional shape adapted to the guide transverse rods 19 protrude rearward and overlap and grip behind the guide transverse rods 19 at the top and bottom.
  • the hydraulic cylinder 18 is hydraulically blocked to establish it in the adjusted position of the milling arm device 15.
  • the base joint 31 of the joint arrangement 5 is arranged between the auxiliary arm 11 and the guide shafts 21, specifically in its lower end region.
  • two auxiliary arms Ila, Ilb which have a horizontal transverse distance from one another, are arranged, which are connected to the guide shafts in a vertically pivotable manner in the lateral end regions of the guide shafts 21 by a base joint 31a, 31b.
  • the vertical pivoting is served by two hydraulic cylinders 32, each of which is connected at its one end by a hinge 33 to the upper end region of the guide shaft 21 and at its other end by a hinge 34 to the other end region of the associated auxiliary arm Ila, Ilb.
  • the auxiliary arm 11 can thus be optionally adjusted and locked between its upper pivot end position shown in FIG. 1 and a lower pivot end position shown in FIG. 3.
  • the knee joint 37 of the toggle-shaped joint arrangement 5 connects the base end of the milling arm 4 to the facing end of the auxiliary arm 11 in a vertically pivotable manner.
  • a hydraulic cylinder 39 which is arranged in the vertical longitudinal center plane 38 or two on both sides of the longitudinal center plane 38, serves to vertically adjust the milling arm 4 are each connected at their rear end by a joint 41, to the rear lower end region of the associated auxiliary arm 11a, Ilb, in a vertically pivotable manner and at their other end by a joint 42, with a lever arm 43, the milling arm, projecting beyond the axis of rotation 37a of the knee joint 37 4 are vertically pivotally connected.
  • Supporting elements of the milling arm 4 are a base part 45, which forms the milling arm-side joint part of the base joint 31 and has two side base legs 46, which are connected to one another by a cap-shaped ceiling wall 47, and one or two, having a horizontal transverse distance c from one another, upright arm strips 48a, 48b, which each extend between a chain drive wheel 49, which is arranged coaxially to the knee joint axis 37a on an associated drive mechanism 51, and a deflecting chain wheel 52 at the free end of the milling arm 4 and at their base ends rigidly with the base legs 46 of the base part 45 are connected and thus form a swivel unit with this.
  • the arm strips 48a, 48b form guides 55 (not shown in detail) for the milling chains 12 equipped with the milling tools 13.
  • milling tools 13 are fastened one behind the other at intervals on both sides of each milling chain, the shape of which may differ from one another, both in comparison of one side with the other and / or in comparison with in the direction of rotation following milling tools 13.
  • the different milling tools are designated by 13a to 13g.
  • Each milling tool 13 consists of a vertical holding leg, with which it is preferably detachably fastened to the milling chain 12, and a working leg projecting laterally inwards or outwards, which can be of a specific shape with respect to certain milling tool groups, such as the foremost milling tools 13 show in Fig. 2.
  • the fastening points on one side of the milling chain 12 are preferably offset from one another in the circumferential direction U with respect to the fastening points on the other side of the milling chain 12, so that there is space for mutually directed milling legs.
  • the direction of rotation U can preferably be directed downwards (FIG. 3) or upwards on the side pointing in the direction of advance V.
  • flexible hose lines are hydraulic lines that extend from a hydraulic pump arranged on the structure 6 to the or preferably hydraulic drive motors 53a, 53b for the drive flute 51.
  • Comparable, hinted flexible hose lines 60 also extend to supply lines 61 arranged on the milling arm 4 for the Soil stabilization means, the flexible hose lines 60 being provided for bridging the joint arrangement 5.
  • the feed lines 61 can be designed as fixed pipelines. 1 and 2 show, the feed lines 61 can be arranged on the inner and / or outer sides of the arm strips 48a, 48b and fastened thereon, and open further on the associated arm strip 48a, 48b, each with an outlet opening 62, which is preferably directed outwards, but can also point in the longitudinal direction of the milling arm 4.
  • line branches can be provided which, for example, penetrate the arm strips 48a, 48b in transverse holes and open out on their inner sides with outlet openings 62.1.
  • the outlet openings 62, 62.1 are thus each in a space which extends between the upper and lower run of the milling tools 13 and which is designated 63a on the outside of the associated arm strip 48a, 48b and 63b on the inside.
  • the outlet openings 62, 62.1 are located in the region of the front half of the milling arm 4, preferably in the free end region of the milling arm 4.
  • two further outlet openings 62a, 62b, 62.1a, 62.1b are in the region of the lower and front halves of the milling arm 4, the outlet opening 62b, 62.1b, which is the most distant from the free end of the milling arm 4, is located in the central region of the length L of the milling arm 4 or in the central region of the maximum immersion depth T, and the two further outlet openings 62, 62a , 62.1, 62.1a are arranged distributed on the remaining area according to the milling arm half.
  • the outlet openings - seen in the side view - can be arranged in the middle position with respect to the milling arm 4 or the arm strips 48a, 48b.
  • the outlet openings, in particular in the lower region with respect to the central axis 64, are arranged offset by the dimension d in the advancing direction V, that is to the front, the dimension d being able to be smaller as the distance from the free end of the milling arm 4 increases.
  • This configuration leads to a better reduction and a lower expenditure of force and energy for the tool drive and thus also for the distribution and it also takes into account the internal pressure of the soil to be mixed with the soil stabilizer, which is in the lower half of the depth, in particular in the lower area of the Milling arm 4 is the largest, and where the greatest working pressure arises.
  • each outlet opening or each pair of outlet openings 62, 62.1; 62a, 62.1a; 62.b, 62.1b is advantageous to cover each outlet opening or each pair of outlet openings 62, 62.1; 62a, 62.1a; 62.b, 62.1b to assign a separate feed line branch 61a, 61b, 61c, which can extend as separate feed lines from a supply or from a preparation device of the soil stabilizing agent or can branch off from a common feed line arranged in the base region of the milling arm 4.
  • a preparation device for the soil stabilization agent is indicated in Fig. 2 and designated 65. This can be, for example, a mixing device for mixing a dry substance consisting, for example, of clay or cement with water to form a liquid soil stabilizer.
  • the delivery rate of the feed or processing device 7, 65 is preferably adjustable so that it is adapted to the speed of the propulsion device 1 or that the detached soil and the suspension form a mixture with the consistency of a slurry, in particular a thick slurry.
  • the adjustability is illustrated by a delivery rate adjusting valve 66 in a feed line 60, which is indicated in FIG. 1.
  • the structure 6 with respect to the undercarriage 2 and the travel chain arrangements 3 is offset to the front, overhanging the latter. This counteracts a tilting moment which emanates from the milling arm 4 in functional operation due to its standing position which is superior to the traveling column 2.
  • control position 8 here in the form of a driver's cab, horizontally and transversely to such an extent and at least in its end positions that the helmsman at the control position 8 can arrange the one and / or other side flight of the
  • Milling arm 4 has good in its viewing direction. This adjustability of the control position 8 is particularly advantageous when the milling arm 4 can be understood laterally, as described above. In the present embodiment, the control place 8 is over the
  • Adjustment device is designated 67. It comprises a horizontal transverse guide 68, on which a base 69 forming the control place 8 or supporting the driver's cab is provided with an adjusting device 71, which is only indicated, with a
  • the Transverse guide 68 preferably comprises two superimposed transverse guide rails 73, 74, which are preferably arranged at the associated end of the structure 6 at its upper and lower edges and on which guide shafts 75, 76 belonging to the control station are guided.
  • a transmission gear for example in the form of a cable pull or rack and pinion drive, can also be assigned to the entry device 67 in the associated drive motor.
  • a seat 77 provided at the control station 8 is rotatable and can be locked in a standing position pointing in the direction of travel V corresponding to the driving direction V or in a position pointing in the opposite direction.
  • the device 1 enables the soil to be solidified by loosening the soil with the milling arm 4 and by simultaneously feeding in the soil stabilizing agent, the soil being mixed in the area of the milling arm 4 and therefore neither having to be conveyed away nor conveyed back.
  • the device 1 works in principle according to the construction mixing method already described at the beginning (mixed-in-place).
  • the device 1 differs in the following features.
  • the soil stabilization agent is introduced under pressure approximately in the region of the lower half of the immersion depth T into the space 63a, 63b delimited by the rotating milling tools 13, where an intensive mixing of the loosened soil with the soil stabilization agent can take place. It is not necessary to transport the detached floor parts to the floor surface. For this reason, the milling tools 13 do not need to carry out any noteworthy conveying capacities in the direction of rotation of the milling tools 13, but preferably a transverse displacement of the detached soil, the mixing with the solidifying agent taking place.
  • the milling arm 4 can be designed with only one arm strip 48, although lower loads act on it.
  • Such a configuration with only one circumferential milling chain 12 on the arm strip 48 is shown in FIG. 6 in a plan view corresponding to FIG. 2.
  • the space 63b existing between two arm strips is omitted.
  • the aggregates improve the ratio of the non-settling material to the settling material.
  • the supply of ballast as an aggregate is particularly suitable for the rehabilitation of railroad tracks, since ballast is present in this area and can be used if necessary, which would otherwise have to be removed.
  • the invention thus also enables the use of solid additives, which can also be waste materials.
  • the milling tools 13 each consist of a vertical holding leg 81 and a working leg 82.
  • the holding leg 81 has two holes 83 with which it passes through one or two chain link pins 84 which pass through the holes 83 are detachably screwed to the associated chain link plate 12a or to one or two adjacent chain links 85 of the chain link 12b.
  • milling tools 13 are arranged offset to one another in the circumferential direction U.
  • the working leg 82 is angled or bent with respect to the holding leg 81 inwards or outwards, the respective angle WI, W2 being able to be 90 ° or deviating from this angle, e.g. an obtuse angle W2 of z. B. may include about 135 ° or an acute angle.
  • the length L3 of the working legs 82 is dimensioned so large with an inward orientation that they end approximately in the existing vertical longitudinal center plane 38. The length L3 can be the same when it is oriented inwards or outwards. There is a distance e between the milling chain 12 and the working legs 82, which can be the same or different from tool 13 to tool 13.
  • the end flanks 86 pointing in the circumferential direction U can enclose a right, an acute or an obtuse angle with the circumferential direction U.
  • the end flanks 86 preferably form an obtuse angle of approximately 95 to 125 °.
  • These angles W3 can be constant or different in the direction of rotation U from milling tool 13 to milling tool 13.
  • milling tools 13 can also be provided on one or both sides of the chain or chains 12, each of which has a working leg 87 which extends - not as in the aforementioned configurations in the projection in the direction of rotation U - but an outward inclination 88, which includes an acute angle W4 of preferably about 5 ° to 45 ° with the direction of rotation U.
  • Such a working leg 87 can form an angle W 5 between the associated articulation axes with respect to the circumferential plane or vertical center plane 38 include about 0 ° to 90 °.
  • FIGS. 9 and 11 show, such a tool 13, with its inclination 88, causes the detached floor to be displaced transversely outwards.
  • the distance el is preferably smaller than e.
  • the parts 81a and 87 of the tools 13 on the other side of the chain are arranged in mirror image.
  • the predominant purpose of the milling tools 13 according to the invention is to detach and mix the soil, with the soil also being ground.
  • the working legs are bent in one piece, rather than tools 13, a special, e.g. there may be an obliquely extending holding leg 81a which extends obliquely from the upper edge of the milling chain 12.
  • the milling tools 13a to 13g are typical wear tools. It is therefore advantageous to make the milling tools 13 entirely of wear-resistant material, e.g. to produce alloy steel or at least to cover the end flanks 86 with a wear-resistant material.
  • An inexpensive and economical measure consists in applying an application 89 made of wear-resistant material to the end flanks 86, e.g. in the form of a weld.
  • the device 1 according to the invention is used to renovate a carriageway or rail track section 91 under which there is a bottom layer 92 of insufficient strength, e.g. Peat layer, at a depth T of up to about 5 m in the present exemplary embodiment.
  • a bottom layer 92 of insufficient strength e.g. Peat layer
  • Such a floor can also be produced using the method according to the invention and the invention Excellent renovation of facility 1.
  • the pending soil 9 is treated and solidified in the sense of the above-described exemplary embodiment over a width A or A + AI which is equal to or greater than the width of the rail route 91.
  • the pending floor 9 is treated after dismantling the track 93 at least to the bottom or somewhat deeper of the labile floor layer 92 in the sense of the invention.
  • These treatment measures can be carried out in several strips so that the device 1 does not have to be built as wide as necessary.
  • a two-track or multi-track rail track section 91 is present, the two tracks of which are designated 93 and 94.
  • the refurbishment is carried out approximately up to the vertical longitudinal center plane 95 of the rail track section 91.
  • the track 93 is reassembled after the application of a conventional track substructure 93a. Then the floor in the other track area AI can be renovated accordingly.
  • the soil improvement can be carried out during the given breaks. It is possible and advantageous, by using a fast-setting hardening agent or by means of appropriate additives, to adjust the soil stabilization to the train traffic in such a way that, at the end of a train break, the treated soil already has sufficient strength, especially in the case of the closest layer S4 to provide sufficient lateral support.
  • the lengths L2 of the work cycle carried out in the advance direction V can be determined as desired.
  • the strength values of the improved floor are comparable to those of a lean concrete.
  • the setting time is particularly in
  • Adaptation to train traffic can be determined.
  • the strengths achieved improved Soil material can subsequently be tested on core samples.
  • the permeability is also verifiable.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Architecture (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Abstract

Un procédé permettant de compacter le sol fait appel à un dispositif (1) pouvant avancer dans le sens du travail (V), qui comporte un bras de fraisage (4) au niveau duquel des outils de fraisage (13) sont fixés sur une chaîne dentée sans fin (12) qui peut être entraînée de façon à tourner dans l'axe longitudinal du bras de fraisage (4). Au niveau de celui-ci, un conduit d'alimentation (61) amène dans la zone des outils de fraisage rotatifs (13) un produit de compactage du sol qui est mélangé avec la terre ameublie, de façon à former un mélange restant derrière le bras de fraisage (4). Le produit de compactage est introduit à la moitié inférieure ou à la partie inférieure du bras de fraisage (4), dans l'espace (63a, 63b) défini par les outils de fraisage rotatifs (13).
PCT/EP1996/003774 1995-11-10 1996-08-27 Procede et dispositif pour compacter le sol Ceased WO1997017497A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19542031.4 1995-11-10
DE19542031A DE19542031B4 (de) 1994-11-11 1995-11-10 Bodenverfestigungsvorrichtung

Publications (1)

Publication Number Publication Date
WO1997017497A1 true WO1997017497A1 (fr) 1997-05-15

Family

ID=7777188

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/003774 Ceased WO1997017497A1 (fr) 1995-11-10 1996-08-27 Procede et dispositif pour compacter le sol

Country Status (1)

Country Link
WO (1) WO1997017497A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2423388A1 (fr) 2010-08-30 2012-02-29 Bauer Spezialtiefbau GmbH Procédé et dispositif de fabrication d'une paroi moulée
EP2985387A1 (fr) 2014-08-15 2016-02-17 GWW-Infra Holding B.V. Fraise et méthode pour fournir un système de protection contre les tubes dans un corps de digue

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1458165A (fr) * 1965-05-06 1966-03-04 Societanche Procédé et machine permettant la construction de voiles étanches dans le sol
FR2006744A1 (fr) * 1968-04-23 1970-01-02 Frisch Geb Kg Eisenwerk
EP0563473A1 (fr) * 1992-04-01 1993-10-06 Kobe Steel, Ltd Excavatrice et procédé d'utilisation
WO1994025191A1 (fr) * 1993-05-03 1994-11-10 Bruso Bruce L Procede et appareil d'assainissement in situ de la terre

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1458165A (fr) * 1965-05-06 1966-03-04 Societanche Procédé et machine permettant la construction de voiles étanches dans le sol
FR2006744A1 (fr) * 1968-04-23 1970-01-02 Frisch Geb Kg Eisenwerk
EP0563473A1 (fr) * 1992-04-01 1993-10-06 Kobe Steel, Ltd Excavatrice et procédé d'utilisation
WO1994025191A1 (fr) * 1993-05-03 1994-11-10 Bruso Bruce L Procede et appareil d'assainissement in situ de la terre

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2423388A1 (fr) 2010-08-30 2012-02-29 Bauer Spezialtiefbau GmbH Procédé et dispositif de fabrication d'une paroi moulée
EP2985387A1 (fr) 2014-08-15 2016-02-17 GWW-Infra Holding B.V. Fraise et méthode pour fournir un système de protection contre les tubes dans un corps de digue
EP2985388A1 (fr) * 2014-08-15 2016-02-17 GWW-Infra Holding B.V. Méthode et outil pour fournir un système de protection contre les tubes dans un corps de digue
NL2013332B1 (nl) * 2014-08-15 2016-09-22 Gww-Infra Holding B V Dijk, een werkwijze om een dijk te verbeteren en een inrichting voor het uitvoeren van de werkwijze.

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