CN106812544B - A kind of reinforcement allows pressure U-shaped steel bracket - Google Patents

Abstract

The invention relates to a reinforced U-shaped steel bracket which can be compressed, which includes first supporting steels arranged vertically on both sides of the roadway, and the upper end of the first supporting steel is provided with a second support for supporting the arc-shaped top surrounding rock of the roadway Shaped steel, the second supporting shaped steel is bent into a curved structure, and the two ends of the second supporting shaped steel form a vertically movable fit with the upper end of the first supporting shaped steel respectively. The sliding pressure relief mechanism is used to block the downward movement of the second supporting steel. The U-shaped steel brackets that can be pressed are arranged at intervals along the length of the roadway. The surrounding rock pressure at the top of the roadway is released and transmitted to the second supporting steel, thus providing Sufficient yield of surrounding rock at the top prevents buckling, kicking and collapse of the U-shaped steel bracket when the U-shaped steel bracket reaches its yield strength, thereby ensuring effective support for the surrounding rock at the arc-shaped top of the roadway, and playing a role in supporting the roadway. Surrounding rock pressure release and rigid support at the top of the arc.

Description

A reinforced U-shaped steel bracket that can be pressed

technical field

The invention relates to the technical field of roadway construction, in particular to a reinforced U-shaped steel support that can be compressed.

Background technique

In the process of roadway construction, in order to support the rock wall of the roadway, supporting steel frames are generally arranged in the roadway. The problem of roadway collapse caused by the pressure release of the surrounding rock at the top and waist of the roadway. During the construction of the roadway, the surrounding rock pressure on the arc-shaped top of the roadway is applied to the supporting steel frame, and the surrounding rock pressure on the arc-shaped top of the roadway is released and transmitted. to both sides of the waist of the roadway, thereby exerting compressive stress on the waist of the supporting steel frame; a large number of roadway construction monitoring data show that if the surrounding rock pressure at the arc-shaped top of the roadway is released too quickly, it will lead to rigidity of the supporting steel frame. The buckling, kicking and collapse of the supporting steel frame creates a great safety hazard.

Contents of the invention

The purpose of the present invention is to provide a reinforced U-shaped steel bracket that can be pressured, which can effectively support the surrounding rocks around the roadway, release the pressure of the surrounding rocks around the roadway, and provide rigid support.

For realizing above-mentioned object, the technical scheme that this combination structure invention adopts is:

A reinforced U-shaped steel bracket that can be compressed, including first supporting steel that is arranged on both sides of the roadway and arranged vertically, and the upper end of the first supporting steel is provided with a second supporting steel for supporting the arc-shaped top surrounding rock of the roadway , the second supporting steel is bent into an arc-shaped structure, the two ends of the second supporting steel are vertically movable with the upper end of the first supporting steel respectively, and the two ends of the second supporting steel are connected with the first supporting steel A limited slip pressure relief mechanism is provided at the overlapping joint of a support profile, and the limited slip pressure relief mechanism is used to block the downward movement of the second support profile.

The additional feature that also exists in the present invention is:

The sections of the first and second supporting steels are U-shaped structures, the notches of the first and second supporting steels are respectively provided with first and second flanges, and the second supporting steels are inserted On the inner wall of the notch of the first support section steel, the second flange is built on the first flange.

The limited slip pressure relief mechanism includes pins arranged at both ends of the second supporting steel, the pins are arranged in the pin seat, the pin seat is fixed in the notch of the second supporting steel, the ends of the second supporting steel There is an opening at the bottom of the groove, the pin and the pin seat are connected by a spring, and the pin protrudes into the opening, and the groove bottom at the upper end of the first support section is provided with a pin hole for the pin to pass through. The pin hole is arranged on a moving path of the pin.

The second flange of the second supporting steel is provided with strip holes, and the long direction of the strip holes is arranged along the length direction of the second supporting steel, and guide bolts are arranged in the strip holes, and the guiding bolts Pass through the strip hole and connect with the first flange of the first supporting steel.

The pin is in the shape of a block as a whole, and the connecting end of the pin and the pin seat is provided with a locking elastic piece, and the locking elastic piece is in the shape of a groove plate as a whole, and one end of the pin is fixed at the bottom of the groove of the locking elastic piece, The two sides of the locking shrapnel are overhanging along the length direction of the pin, and a support spring is arranged between the two sides of the locking shrapnel and the pin, and the pin seat is provided with an opening that matches the outline of the pin, and the spring is arranged on At the bottom of the opening, a limiting plate is provided on the opening, and a card interface for locking the elastic piece is formed between the limiting plate and the inner wall of the opening.

A clamping box for clamping the pin is arranged on the first supporting section steel, the opening of the clamping box is located at the pin hole, a limiting groove is arranged in the clamping box, and a limiting groove is arranged on the pin. The groove forms a snap fit nose.

The U-shaped steel supports that can be pressed are arranged at intervals along the length direction of the roadway, and the first supporting steels of the adjacent U-shaped steel supports that can be pressed are connected by pressing bars, and the pressing bars can be moved along the The length direction of the roadway expands and contracts, and the two ends of the let-down bar are respectively connected with the sleeves provided on the first supporting steel bracket of the adjacent let-down steel bracket, and the sleeves form a flexible connection with the first supporting steel. There are also two supporting steel bars intersected between the adjacent U-shaped steel brackets that can be pressed. .

The pressure relief rod includes first and second pressure relief rods, one end of the first pressure relief rod is provided with a plug-in rod, and the connecting section between the first pressure relief rod and the second pressure relief rod is provided with a The insertion slot of the insertion rod is placed, and the pressure relief spring is arranged between the second pressure relief rod and the first pressure relief rod.

An anchor rod is arranged at the intersection of the two supporting steel bars, and the anchor rod is vertical and inserted at the arc-shaped top of the roadway.

Compared with the prior art, the technical effect of the present invention is: the above-mentioned allowable U-shaped steel brackets are arranged at intervals along the length direction of the roadway, and when the surrounding rock pressure at the top of the roadway is released, it is transferred to the second supporting steel, thereby Provide sufficient pressure for the surrounding rock at the top of the roadway, avoid the buckling, kicking and collapse of the steel bracket caused by plastic deformation, thereby ensuring effective support for the surrounding rock around the roadway, and exerting pressure on the surrounding rock around the roadway pressure release and rigid support.

Description of drawings

Fig. 1 is a structural schematic diagram of the connection of two reinforced U-shaped steel brackets that can be pressed;

Fig. 2 and Fig. 3 are two kinds of end face structural schematic diagrams of the cooperation of the first supporting steel and the second supporting steel in the reinforced U-shaped steel support;

Fig. 4 is a schematic diagram of the end face structure of the second supporting section steel;

Fig. 5 is a schematic diagram of the end face structure of the first supporting section steel;

Fig. 6 is the structural representation of pin;

Fig. 7 is the structural representation of pin seat;

Fig. 8 is a partial structural schematic view of the pressing bar.

Detailed ways

In conjunction with Fig. 1 to Fig. 8, the present invention is described further:

A reinforced U-shaped steel support that can be pressed, including first supporting steel 10 arranged vertically on both sides of the roadway, and the upper end of the first supporting steel 10 is provided with a second supporting rock for supporting the arc-shaped top of the roadway. Supporting shaped steel 20, the second supporting shaped steel 10, 20 is bent into a curved structure, the two ends of the second supporting shaped steel 20 respectively form a vertically movable fit with the upper end of the first supporting shaped steel 10, the second supporting shaped steel The two ends of the two supporting shaped steel 20 and the first supporting shaped steel 10 are provided with a limited slip pressure relief mechanism, which is used to block the downward movement of the second support shaped steel 20;

As shown in Figure 1, the U-shaped steel supports of the above structure are applied in the roadway, and are arranged at intervals along the length direction of the roadway. The section steel 10 moves down, so as to provide sufficient reserved distance for the pressure release of the arc-shaped top surrounding rock of the roadway, so as to avoid buckling, kicking and collapse of the steel bracket due to sudden pressure. When the second support section steel 20 descends When it reaches the lowest end, the limited slip pressure relief mechanism is used to prevent the second supporting steel 20 from descending, so as to form a rigid support for the surrounding rock of the roadway and avoid further deformation of the surrounding rock at the top of the roadway;

The U-shaped steel bracket disclosed in the invention can implement elastic support to the surrounding rock at the top of the roadway first and then steel, thereby improving the reliability of supporting the surrounding rock at the top of the roadway.

As a preferred solution of the present invention, the cross sections of the first and second supporting steel 10, 20 are "U"-shaped structures, and the notches of the first and second supporting steel 10, 20 are respectively provided with first, Second flanging 11, 21, the second supporting shaped steel 20 is inserted in the notch inner wall of the first supporting shaped steel 10 and the second flanging 21 is built on the first flanging 11;

As shown in Figure 4 and Figure 5, the above-mentioned first and second supporting steel 10, 20 have a "U"-shaped cross-section, which can withstand the strongest torsion resistance, thereby improving the structure of the steel support itself from the structure itself. strength.

Further, the limited slip pressure relief mechanism includes pins 30 arranged at both ends of the second supporting steel 20, the pins 30 are arranged in the pin seat 40, and the pin seat 40 is fixed on the second supporting steel 20. In the notch, the bottom of the groove at the end of the second support section steel 20 is provided with an opening 22, and the pin 30 and the pin seat 40 are connected by a spring 50, and the pin 30 protrudes into the opening 22, and the first support A pin hole 12 for the pin 30 to pass through is provided at the groove bottom of the upper end of the shaped steel 10, and the pin hole 12 is arranged on the moving path of the pin 30;

When the surrounding rock pressure of the roadway is released, the second supporting steel 20 slides down along the first supporting steel 10. Since the pin seat 40 of the pin 30 is fixed at the notch of the second supporting steel 20, the pin seat 40 It is connected with the pin 30 by a spring 50, so that the pin 30 extends into the opening 22 of the second support profile steel 20 and abuts against the groove bottom of the first support profile steel 10. When the second support profile steel 20 descends to a designated point, the Under the action of the elasticity of the spring 50, the pin 30 springs into the pin hole 12 of the first supporting steel 10, and at this time, the pin 30 is located in the opening 22 or in the pin hole 12, thereby realizing the first supporting steel 10 and the second supporting steel 20. The connection between them is used to prevent the second supporting steel 20 from moving down. At this time, the second supporting steel 20 realizes the rigid support for the roadway positioning surrounding rock.

The second flange 21 of the second supporting steel 20 is provided with a strip hole 211, the long direction of the strip hole 211 is arranged along the length direction of the second supporting steel 20, and the strip hole 211 is provided with a guide Bolt 23, the guide bolt 23 passes through the strip hole 211 and is connected with the first flange 11 of the first supporting steel 10;

The above-mentioned second supporting steel 20 slides on the first supporting steel 10, and the guide bolt 23 is used to guide and limit, on the one hand, avoiding the displacement between the first supporting steel 10 and the second supporting steel 20 due to the elasticity of the spring 50. The dangerous situation of separation of the steel bracket, another convenient realization of the accurate guidance of the vertical sliding of the first supporting steel 10, thereby ensuring that the first supporting steel 10 can accurately slide down along the notch of the second supporting steel 20, when the second The second supporting steel 20 descends until the opening 22 of the second supporting steel 20 is aligned with the pin hole 12 on the first supporting steel 10 , under the elastic support of the spring 50 , so that the pin 30 springs into the pin hole 12 and the opening 22 Inside, the restriction on the downward movement of the second support section steel 20 is realized.

Further, the pin 30 is in the shape of a block as a whole, and the connecting end of the pin 30 and the pin seat 40 is provided with a locking elastic piece 31, and the locking elastic piece 31 is in the shape of a groove plate as a whole, and one end of the pin 30 is fixed At the bottom of the groove of the locking elastic piece 31, the two sides of the locking elastic piece 31 cantilever along the length direction of the pin 30, and a supporting spring 32 is arranged between the two sides of the locking elastic piece 31 and the pin 30, and the pin seat 40 is provided with an opening 41 matching the outline of the pin 30, the spring 50 is arranged at the bottom of the opening 41, and the opening 41 is also provided with a limiting plate 43, which is formed between the limiting plate 43 and the inner wall of the opening 41. It is used to clamp the card interface of the locking shrapnel 31;

The above-mentioned pin 30 is clamped in the opening 41 on the pin seat 40, and the assembly of the pin 30 and the pin seat 40 has been realized. Specifically, when the pin 30 squeezes into the opening 41, under the action of the extrusion force, the card will The fixed elastic piece 31 is deformed so that it can enter the bayonet socket. When the pin 30 squeezes into a deeper position in the opening 41, the fixed elastic piece 31 protrudes into the bayonet interface formed between the limiting plate 43 and the inner wall of the opening 41. Under the elastic supporting force of the supporting spring 32, the locking elastic piece 31 is inserted into the locking interface formed between the limiting plate 43 and the inner wall of the opening 41;

Under the elastic action of the spring 50, the pin 30 is ejected into the pin hole 12 of the first supporting profiled steel 10, and under the limiting action of the limiting plate 43, the pin 30 is prevented from being ejected too much in the pin hole 12 of the first supporting profiled steel 10. The deep position ensures that the middle position of the pin 30 is in the middle position between the pin hole 12 of the first support profile steel 10 and the opening 22 of the second support profile steel 20, so as to ensure the support strength of the pin 30 itself and prevent the pin 30 from being subjected to a large pressure. Stress causes the phenomenon of skimming.

In order to further ensure that the pin 30 is in the middle position between the pin hole 12 of the first support profile 10 and the opening 22 of the second support profile 20, the first support profile 10 is provided with a snap-in box 13 for clamping the pin 30, so The opening of the snap-in box 13 is located at the pin hole 12, and the snap-in box 13 is provided with a limiting groove 51, and the pin 30 is provided with a protrusion 33 that is engaged with the limiting groove 51;

The above-mentioned pin 30 springs into the snap-in box 13, and makes the protrusion 33 on the pin 30 snap into the limit groove 51 in the box 50, thereby realizing further positioning of the pin 30 and avoiding the random movement of the pin 30. move.

In order to avoid the surrounding rock pressure from causing the first supporting steel 10 of the steel bracket to produce stress along the length direction of the roadway, the pressure-capable steel brackets are arranged at intervals along the length direction of the roadway. The first support section steel 10 of the bracket is connected by letting the pressure bar, which can expand and contract along the length direction of the roadway, and the two ends of the letting the pressure bar are respectively connected with the first of the adjacent allowable steel bracket. The sleeve 70 arranged on the support profile steel 10 is connected, and the sleeve 70 forms a flexible connection with the first support profile steel 10, and two support steel bars 80 are also arranged crosswise between adjacent steel supports that can be pressed. The strip 80 is arranged in a curved manner and its two ends are fixed with the sleeve 70 provided on the first supporting steel 10 of the adjacent steel support that can be pressed;

The above-mentioned supporting steel bar 80 bears the pressure release of the surrounding rock and transmits it to both ends and to the sleeve 70. Since the direction of the pressure release of the surrounding rock is changeable, it is transmitted to the adjacent first and second pressure relief bars. The direction of the stress on 61, 62 is also changeable, so that the first supporting steel 10 can move along the let-down bar, so as to provide the first supporting steel 10 with a sufficient yielding deformation distance, and avoid the first supporting steel 10 due to a sudden Bending deformation caused by stress.

As shown in FIG. 8 , the pressure relief rod includes first and second pressure relief rods 61 , 62 , one end of the first pressure relief rod 61 is provided with a plug-in rod, and the first pressure relief rod 61 is connected to the second pressure relief rod 61 . The connecting section of the second pressure bar 62 is provided with an insertion slot for inserting a plug-in rod, and a pressure spring 63 is arranged between the second pressure bar 62 and the first pressure bar 61;

The cooperation between the first and second pressure rods 61 and 62 of the above-mentioned let-down bar can realize the elastic support of the first supporting steel 10 adjacent to the let-down steel bracket, which is soft first and then steel, and then improves the roadway. The firmness of surrounding rock support.

Specifically, an anchor rod 81 is provided at the intersection of the two supporting steel bars 80, and the anchor rod 81 is vertical and inserted at the arc-shaped top of the roadway;

The above-mentioned anchor rod 81 applies the pressure released by the surrounding rock at the top of the roadway to the anchor rod 81 , thereby releasing to the two supporting steel bars 80 .

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it still can The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (6)

1. U-shaped steel bracket is pressed in a kind of allowing for reinforcement, it is characterised in that：Including tunnel two sides are set and vertically arrange first Support fashioned iron（10）, the first support fashioned iron（10）Upper end be provided with and be used to support second of country rock at the top of tunnel arc Support fashioned iron（20）, the second support fashioned iron（20）Bend to curved arcuate structure, the second support fashioned iron（20）Both ends point Fashioned iron is not supported with first（10）Upper end constitute the removable cooperation of vertical direction, the second support fashioned iron（20）Both ends with First support fashioned iron（10）Lap-joint be provided with restriction sliding and allow press mechanism, the restrictions sliding allows press mechanism to be used to stopping the Two support fashioned iron（20）Move down；

The first support fashioned iron（10）, second support fashioned iron（20）Section be "u"-shaped, it is described first support fashioned iron （10）, second support fashioned iron（20）Notch at be respectively arranged with the first flange（11）, the second flange（21）, second support Fashioned iron（20）It is plugged on the first support fashioned iron（10）Notch inner wall and the second flange（21）Ride upon the first flange（11）On；

The restriction sliding allows press mechanism to include setting in the second support fashioned iron（20）Pin at both ends（30）, the pin（30）If It sets in key seat（40）It is interior, the key seat（40）It is fixed on the second support fashioned iron（20）Notch in, second support fashioned iron（20）'s The slot bottom of end is provided with opening（22）, the pin（30）With key seat（40）Between pass through spring（50）Connection, the pin（30） Protrude out to opening（22）It is interior, the first support fashioned iron（10）Upper end slot bottom be provided with for pin（30）The pin hole passed through （12）, the pin hole（12）Positioned at pin（30）Movement routine on arrange；

The second support fashioned iron（20）The second flange（21）On be provided with strip-shaped hole（211）, the strip-shaped hole（211）Hole is long Direction is along the second support fashioned iron（20）Length direction arrangement, strip-shaped hole（211）Inside it is provided with guide blot（23）, described to lead To bolt（23）Across strip-shaped hole（211）And fashioned iron is supported with first（10）The first flange（11）Connection.

2. U-shaped steel bracket is pressed in a kind of allowing for reinforcement according to claim 1, it is characterised in that：The pin（30）It is whole In square, the pin（30）With key seat（40）Connecting pin be provided with locking elastic slice（31）, the locking elastic slice（31）It is whole In frid shape, the pin（30）One end be fixed on locking elastic slice（31）Slot bottom at, locking elastic slice（31）Two sides along Pin（30）Length direction overhang, locking elastic slice（31）Two sides and pin（30）Between be provided with support spring（32）, described Key seat（40）On be provided with and pin（30）The identical opening of profile（41）, the spring（50）Setting is being open（41）Bottom, The opening（41）On be additionally provided with limit plate（43）, the limit plate（43）With opening（41）It is formed between inner wall for being clamped Locking elastic slice（31）Card interface.

3. U-shaped steel bracket is pressed in a kind of allowing for reinforcement according to claim 1, it is characterised in that：First support type Steel（10）On be provided with for be clamped pin（30）Clamping box（13）, the clamping box（13）Opening be located at pin hole（12）Place, It is clamped box（13）Inside it is provided with limiting groove（51）, the pin（30）On be provided with and limiting groove（51）Constitute clamping engagement Plush copper（33）.

4. pressing U-shaped steel bracket to a kind of allowing for reinforcement described in 3 any one according to claim 1, it is characterised in that：It is described Pressure U-shaped steel bracket can be allowed to be arranged at intervals with along the length direction in tunnel multiple, first of U-shaped steel bracket is pressed in adjacent allowing Support fashioned iron（10）Between by allowing compression bar to connect, described make compression bar flexible along the length direction in tunnel, the compression bar that allows Both ends allow the first of compressed steel bracket to support fashioned iron with adjacent respectively（10）The sleeve of upper setting（70）Connection, the sleeve （70）With the first support fashioned iron（10）It constitutes and is flexibly connected, adjacent allow also arranged in a crossed manner between compressed steel bracket has two supporting steels Item（80）, the support steel bar（80）Curved arrangement and both ends and adjacent the first of compressed steel bracket is allowed to support fashioned iron（10）On The sleeve of setting（70）It is fixed.

5. U-shaped steel bracket is pressed in a kind of allowing for reinforcement according to claim 4, it is characterised in that：It is described to allow the compression bar to include First allows compression bar（61）, second allow compression bar（62）, described first allows compression bar（61）One end be provided with shank, described first allows Compression bar（61）Compression bar is allowed with second（62）Linkage section be provided with the inserting groove for planting shank, described second allows compression bar （62）Compression bar is allowed with first（61）Between setting allow pressing spring（63）.

6. U-shaped steel bracket is pressed in a kind of allowing for reinforcement according to claim 4, it is characterised in that：The two supports steel bar （80）Crosspoint on be provided with anchor pole（81）, the anchor pole（81）Arc top that is vertical and being plugged on tunnel.