Bearing bracket for cutting and dismantling inner support of foundation pit support

Abstract

The utility model relates to a load-bearing bracket for cutting and dismantling an inner support of a foundation pit support, which comprises a carrying pole beam assembly, lower hanging triangular brackets connected to two ends of the carrying pole beam assembly, a diagonal bridging assembly arranged between the two lower hanging triangular brackets, and a load-bearing force transmission assembly arranged on the lower hanging triangular brackets, the bearing force transmission assembly comprises an adjustable jacking installed on a cross beam of the lower hanging triangular support and a supporting beam installed on the top of the adjustable jacking, and the adjustable jacking is adjusted to enable the supporting beam to abut against the bottom of the inner supporting beam so that the overall vertical load generated after the inner supporting beam is cut can be transmitted to the lower hanging triangular support. And then the signals are respectively transmitted to the side wall and the top beam of the foundation pit supporting structure through the lower hanging triangular bracket and the carrying pole beam assembly. The load-bearing bracket for cutting and removing the inner support of the foundation pit support can be used in combination with a traditional heavy support so as to solve the supporting problem of removing the inner support on the upper portion of a fat groove in the cutting and removing construction of the inner support of the foundation pit support.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology, and specifically relates to a load-bearing bracket for cutting and dismantling internal support of foundation pit. Background Technology

[0002] Reinforced concrete internal supports are widely used in the construction of deep foundation pit basements. These supports are typically replaced and then removed layer by layer as the basement is constructed. The basement's projection area contains beam and slab structures. Before removal, heavy-duty scaffolding is usually erected on the basement's beam and slab structures. The beams and slabs are then cut into sections using a wire saw on the heavy-duty scaffolding before being hoisted and removed. For example, CN106836237A discloses a support structure and its construction method for removing internal support beams in a foundation pit. This support structure includes several support brackets and several square timber strips. The support brackets are arranged side-by-side on a base plate. Each support bracket includes four uprights, horizontal bars fixed between the top and bottom of adjacent uprights, and diagonal bars fixed between opposite corners of adjacent uprights. Each upright has a top adjustment device installed at its top. Two square timber strips are symmetrically placed on each support bracket. The two ends of each square timber strip rest on adjacent top adjustment devices. The top adjustment devices are adjusted until the square timber strips contact the internal support beam to be removed, thus supporting the cut concrete internal support beam blocks. However, in the trench section inside the foundation pit but outside the pit area, the space under the internal support beam is relatively high and small, making the erection of the support frame labor-intensive and costly. The erection and dismantling of the frame is also difficult, and it is hard to ensure the overall stability of the narrow frame. Utility Model Content

[0003] The purpose of this utility model is to provide a structurally stable and easily assembled / disassembled load-bearing bracket for cutting and dismantling internal supports in foundation pits. It can be used in conjunction with traditional heavy-duty supports to solve the support problem of dismantling the upper internal supports of the trench during the cutting and dismantling of internal supports in foundation pits.

[0004] The technical solution of this utility model is a load-bearing bracket for cutting and dismantling internal supports in foundation pits, including:

[0005] A spreader beam assembly includes a spreader beam and anchor beams welded to the inner sides of both ends of the spreader beam. The spreader beam is installed on top of an inner support beam and extends along the width direction of the inner support beam. The anchor beams extend along the length direction of the inner support beam, with one end welded to the side of the spreader beam and the other end fixed to the crown beam by anchor bolts.

[0006] Two lower triangular brackets are installed on both sides of the inner support beam. Each lower triangular bracket is formed by welding a vertical rod, a horizontal beam, and a diagonal brace. The upper end of the vertical rod is connected and fixed to the spreader beam, and its lower end is connected in sequence to the horizontal beam and the diagonal brace located below the inner support beam. The lower end of the vertical rod is provided with a fixed support, which abuts against the side wall of the foundation pit support structure.

[0007] A scissor brace assembly is connected between two lower hanging triangular brackets. The scissor brace assembly includes a vertical scissor brace installed in the vertical direction and a horizontal scissor brace installed in the horizontal direction.

[0008] The load-bearing and force-transmitting component includes adjustable top supports installed on the crossbeams of two lower triangular brackets and a support beam installed on top of the adjustable top supports. The support beam extends along the width direction of the inner support beam. The adjustable top supports are adjusted so that the support beam is pressed tightly against the bottom of the inner support beam, so as to transfer the overall vertical load of the inner support beam after it is cut to the lower triangular brackets, and then to the side wall of the foundation pit support structure and the cap beam through the lower triangular brackets and the spreader beam assembly, respectively.

[0009] Preferably, steel plate connecting plates and first stiffening plates are welded to both ends of the spreader beam, and the steel plate connecting plates and first stiffening plates are connected and fixed to the upper end of the vertical rod by bolts.

[0010] Preferably, the lower end of the vertical rod is provided with an adjustable support, which is arranged parallel to the fixed support. When the side wall of the foundation pit support structure is uneven, the lower triangular bracket abuts against the side wall of the foundation pit support structure through the adjustable support.

[0011] Preferably, the adjustable support consists of a first screw and a cross wrench. The first screw passes through a first limiting plate and a second limiting plate welded to both sides of the vertical rod and is threadedly connected to a nut welded to the outside of the second limiting plate. The cross wrench is adjusted so that the first screw abuts against the side wall of the foundation pit support.

[0012] Preferably, a second stiffening plate is provided at the stress-bearing node where the crossbeam and the vertical rod connect. One side of the second stiffening plate is welded and fixed to the crossbeam, and the other side of the plate is welded and fixed to the vertical rod.

[0013] Preferably, there are two second stiffening plates, which are symmetrically welded to the top and bottom of the crossbeam.

[0014] Preferably, ladder steps are welded to the outside of the vertical rod.

[0015] The foundation pit support internal support cutting and dismantling load-bearing bracket provided by this utility model consists of two lower triangular brackets suspended at both ends of a spreader beam, forming a load-bearing bracket for cutting and dismantling the lower internal support. The outer sides of both ends of the spreader beam are anchored to the cap beam bolts by anchor bolts. The two lower triangular brackets form a stable load-bearing bracket structure through vertical and horizontal scissor bracing. The overall vertical load after the internal support beam is cut is transmitted to the load-bearing bracket through the support beam and adjustable top support, and then transferred to the side wall of the foundation pit support structure and the cap beam by the lower triangular brackets and the upper spreader beam, respectively, to solve the support point problem. At the same time, the load-bearing bracket can be used in conjunction with traditional heavy-duty brackets to solve the support problem of dismantling the upper internal support of the foundation pit. Attached Figure Description

[0016] Figure 1 This is a schematic cross-sectional view of the foundation pit support of this utility model;

[0017] Figure 2 This is a side elevation diagram of the internal support cutting and dismantling load-bearing bracket of the foundation pit support of this utility model;

[0018] Figure 3 This is a side elevation sectional view of the load-bearing bracket for cutting and dismantling the internal support of the foundation pit support according to this utility model.

[0019] Figure 4 This is a plan view of the cutting and dismantling of the load-bearing bracket for the internal support of the foundation pit according to this utility model;

[0020] Figure 5 This is a front elevation view of the load-bearing bracket for cutting and dismantling the internal support of the foundation pit support according to this utility model.

[0021] Figure 6 This is a schematic diagram showing the connection between the spreader beam and the lower triangular bracket of this utility model;

[0022] Figure 7 This is a schematic diagram showing the connection between the adjustable top support, the support beam, and the inner support beam of this utility model;

[0023] Figure 8 This is a schematic diagram of the structure of the spreader beam of this utility model;

[0024] Figure 9 This is a structural schematic diagram of the anchoring beam of this utility model;

[0025] Figure 10 This is a schematic diagram of the structure of the lower hanging triangular bracket of this utility model;

[0026] Figure 11 This is a schematic diagram of the adjustable support structure of this utility model;

[0027] Figure 12 yes Figure 11 A schematic diagram of the structure of the center cross handle;

[0028] Figure 13 This is a schematic diagram of the adjustable top support of this utility model.

[0029] Explanation of key component symbols:

[0030] Carrying beam assembly 1; Carrying beam 11; Anchor beam 12; Steel plate connecting plate 13; First stiffening plate 14; Anchor bolt 15; Lower hanging triangular bracket 2; Vertical rod 21; Bolt hole 211; Steel pipe ladder 212; Horizontal beam 22; Diagonal brace 23; Bolt 24; Fixed support 25; Adjustable support 26; First screw 261; Cross wrench 262; First limiting plate 263; Second limiting plate 264; Nut 265; Second stiffening plate 27; Scissor brace connecting plate 28; Steel sleeve 29; Scissor brace connecting disc 291; Scissor brace assembly 3; Vertical scissor brace 31; Horizontal scissor brace 32; Load-bearing force transmission assembly 4; Adjustable top support 41; Second screw 411; Support 412; Adjusting nut 413; Support beam 42; Inner support beam 5; Inner support beam cutting line 51; Crown beam 6; Heavy-duty bracket 7; Fertilizer trench 8; Foundation pit support structure 9. Detailed Implementation

[0031] This utility model will be further described in detail below with reference to the accompanying drawings:

[0032] Please see Figure 1 As shown, reinforced concrete internal bracing is widely used in the construction of deep foundation pit basements. The reinforced concrete internal bracing for deep foundation pit support is typically replaced and then removed layer by layer as the basement is constructed. The basement's projection area contains beam-slab structures. Before removal, heavy-duty scaffolding 7 is generally erected on the basement beam-slab structure. The structure is then cut section by section using a wire saw on the heavy-duty scaffolding 7 before being hoisted and removed. However, as... Figure 1 As shown, in the section of the trench 8 located within the foundation pit but outside its boundaries, the space below the inner support beam 5 is relatively high and limited, resulting in a large workload and high cost for erecting the support frame. The erection and dismantling of the frame are also difficult, and ensuring the overall stability of the elongated frame is challenging. To address the shortcomings of existing technology, this utility model provides a load-bearing bracket for cutting and dismantling the inner support of the foundation pit support. This load-bearing bracket can be used in conjunction with a traditional heavy-duty support 7 to solve the support problem during the dismantling of the upper inner support of the trench 8.

[0033] Please see Figures 2 to 5 As shown, the foundation pit support internal support cutting and dismantling load-bearing bracket provided by this utility model includes: a spreader beam assembly 1, two lower hanging triangular brackets 2, a scissor brace assembly 3, and a load-bearing force transmission assembly 4.

[0034] Please see Figure 8 , Figure 9As shown, the spreader beam assembly 1 includes a spreader beam 11 and anchor beams 12 welded to the inner sides of both ends of the spreader beam 11. The spreader beam 11 is generally made of I-beams or H-beams; please refer to... Figure 5 , Figure 6 As shown, the spreader beam 11 is installed on top of the inner support beam 5 and extends along the width of the inner support beam 5. Steel plate connecting plates 13 and first stiffening plates 14 are welded to both ends of the spreader beam 11 to connect to the lower triangular bracket 2; please refer to... Figures 2 to 4 As shown, the anchor beam 12 extends along the length of the inner support beam 5. One end of the anchor beam 12 is welded to the side of the spreader beam 11, and the other end of the anchor beam 12 is fixed to the crown beam 6 by the anchor bolt 15. The spreader beam 11 is anchored in the crown beam concrete structure by the cooperation of the anchor beam 12 and the anchor bolt 15, which can effectively prevent the load-bearing bracket from slipping and becoming unstable during the stress process.

[0035] Please see Figures 4 to 6 As shown, two lower triangular brackets 2 are installed on both sides of the inner support beam 5. Each lower triangular bracket 2 is formed by welding a vertical rod 21, a horizontal beam 22 and a diagonal brace 23. The two lower triangular brackets 2 form a load-bearing bracket for cutting and dismantling the lower inner support. The upper end of the vertical rod 21 is provided with bolt holes 211, which are connected and fixed to the steel plate connecting plate 13 and the first stiffening plate 14 welded to the end of the spreader beam 11 by bolts 24. The lower end of the vertical rod 21 is connected to the horizontal beam 22 and the diagonal brace 23 located below the inner support beam 5 in sequence. The lower end of the vertical rod 21 is provided with a fixed support 25, which abuts against the side wall of the foundation pit support structure 9.

[0036] Please see Figures 4 to 5 As shown, the scissor bracing assembly 3 is connected between the two lower triangular brackets 2. The scissor bracing assembly 3 includes a vertical scissor brace 31 installed in the vertical direction and a horizontal scissor brace 32 installed in the horizontal direction. The two lower triangular brackets 2 form a stable load-bearing bracket structure through the vertical scissor brace 31 and the horizontal scissor brace 32.

[0037] Please see Figures 2 to 5 As shown, the load-bearing force transmission component 4 includes four adjustable top supports 41 mounted on two lower triangular bracket crossbeams 22 and two support beams 42 mounted on top of the adjustable top supports 41; as Figure 4 , Figure 5 , Figure 7 As shown, the support beam 42 extends along the width direction of the inner support beam 5. The adjustable top support 41 is adjusted so that the support beam 42 is pressed against the bottom of the inner support beam 5, so as to transfer the overall vertical load after the inner support beam is cut to the lower triangular bracket 2, and then to the side wall of the foundation pit support structure 9 and the cap beam 6 through the lower triangular bracket 2 and the spreader beam assembly 1 respectively.

[0038] The foundation pit support internal support cutting and dismantling load-bearing bracket provided by this utility model consists of two lower triangular brackets 2 suspended at both ends of the spreader beam 11, forming a load-bearing bracket for cutting and dismantling the lower internal support. The outer sides of both ends of the spreader beam 11 are anchored to the crown beam 6 by anchor bolts 15. The two lower triangular brackets 2 form a stable load-bearing bracket structure through vertical scissor bracing 31 and horizontal scissor bracing 32. The overall vertical load after the internal support beam 5 is cut is transmitted to the load-bearing bracket through the support beam 42 and the adjustable top support 41, and then transmitted to the side wall of the foundation pit support structure 9 and the crown beam 6 by the lower triangular brackets 2 and the upper spreader beam 11, respectively, thereby solving the support problem for the dismantling of the upper internal support of the foundation pit.

[0039] It is worth noting that the load-bearing bracket for cutting and dismantling the internal support of the foundation pit can be used in conjunction with traditional heavy-duty supports to solve the support problem during the dismantling of the internal support on the upper part of the trench. For example... Figure 1 As shown, the heavy-duty support 7 is erected on the basement beam and slab structure, and the load-bearing bracket is installed on the inner support beam at the upper end of the trough 8. Before removing the inner support beam, the cutting position is determined according to the lower heavy-duty support or load-bearing bracket to ensure that after the inner support beam concrete structure is cut, it rests on at least two support beams, and the cantilever lengths at both ends remain balanced to ensure the stability of the concrete after cutting. According to... Figure 1 The demolition direction indicated by the arrow is to first cut the mid-span inner support beam, then extend it segment by segment towards the foundation pit support structure, and finally cut the end inner support.

[0040] Please see Figure 2 As shown, the support beam 42 is located inside the inner support beam cutting line 51. The distance between the two support beams 42 is smaller than the distance between the two inner support beam cutting lines 51, so that the cut inner support beam 5 falls on the two support beams 42. While transferring the overall vertical load of the inner support beam after cutting through the support beams 42, the stability of the cut inner support beam 5 is also ensured.

[0041] Please see Figure 2 , Figure 3 , Figure 5 , Figure 6 As shown, an adjustable support 26 is provided at the lower end of the vertical rod 21. The adjustable support 26 is arranged parallel to the fixed support 25. When the side wall of the foundation pit support structure 9 is uneven, the lower triangular bracket 2 abuts against the side wall of the foundation pit support structure 9 through the adjustable support 26. It should be noted that the adjustable support 26 is provided at the lower end of the vertical rod 21 of the lower triangular bracket 2 to adjust for unevenness in the side wall structure of the foundation pit support structure 9.

[0042] Please see Figures 10 to 12As shown, the adjustable support 26 consists of a first screw 261 and a cross wrench 262. The first screw 261 passes through the first limiting plate 263 and the second limiting plate 264 welded on both sides of the vertical rod 21 and is threadedly connected to the nut 265 welded on the outside of the second limiting plate 264. The cross wrench 262 is adjusted so that the first screw 261 abuts against the side wall of the pit support structure 9 to adapt to the uneven surface of the side wall of the pit support structure.

[0043] Please see Figure 4 , Figure 10 As shown, the crossbeam 22 is a double-channel steel formed by combining two channel steels. The diagonal brace 23 and the vertical rod 21 are steel square tubes. The diagonal brace 23 and the vertical rod 21 are welded between the two channel steels of the crossbeam 22. A second stiffening plate 27 is provided at the stress-bearing node connecting the crossbeam 22 and the vertical rod 21. One side of the second stiffening plate 27 is welded and fixed to the crossbeam 22, and its adjacent other side is welded and fixed to the vertical rod 21. Figure 10 As shown, there are two second stiffening plates 27, which are symmetrically welded to the top and bottom of the crossbeam 22. Since the connection between the double-channel steel crossbeam 22 and the vertical bar 21 is a part with greater stress, the load-bearing capacity is enhanced by setting second stiffening plates 27 on both the top and bottom of the crossbeam 22.

[0044] Please see Figure 6 As shown, two scissor brace connecting plates 28 are welded at intervals on the inner side of the vertical rod 21 located below the inner support beam 5 for installing vertical scissor braces 31. The vertical scissor braces 31 are two steel pipes connected by a pivot in the middle. The ends of the steel pipes are opened with pivot pin holes. The vertical scissor braces 31 are connected and fixed to the scissor brace connecting plates 28 by pivot pins, thereby installing and fixing the vertical scissor braces 31 between the two lower hanging triangular brackets 2 to improve the vertical stability of the load-bearing bracket.

[0045] Please see Figure 4 , Figure 7 , Figure 10 As shown, both ends of the crossbeam 22 are fixed with steel sleeves 29 for installing adjustable top supports 41. The steel sleeves 29 are provided with scissor brace connecting plates 291 for connecting the horizontal scissor brace 32. The scissor brace connecting plates 291 are provided with pin holes. The horizontal scissor brace 32 consists of two steel pipes connected by a pivot in the middle. The ends of the steel pipes are provided with pins. The pins are inserted into the pin holes to connect the horizontal scissor brace 32 with the scissor brace connecting plates 291, thereby installing and fixing the horizontal scissor brace 32 between the two lower hanging triangular brackets 2 to improve the horizontal stability of the load-bearing bracket.

[0046] Please see Figure 7 , Figure 13As shown, the adjustable top support 41 includes a second screw 411, a support 412 located on the top of the second screw 411, and an adjusting nut 413 threadedly connected to the second screw 411. The support beam 42 is installed on the support 412. The second screw 411 is inserted into the steel sleeve 29. The support beam 42 is pressed against the bottom of the inner support beam 5 by adjusting the adjusting nut 413.

[0047] Please see Figure 2 , Figure 5 , Figure 6 As shown, ladder steps 212 are welded to the outside of the vertical rod 21; to facilitate the installation and dismantling of the load-bearing bracket, if there is no basement construction scaffolding under the load-bearing bracket, steps for the steel pipe ladder can be welded to the outside of the vertical rod.

[0048] The foundation pit support internal support cutting and dismantling load-bearing bracket provided by this utility model can be used in conjunction with traditional heavy-duty supports. The heavy-duty supports are erected on the basement beam and slab structure, and the load-bearing bracket is installed on the end internal support beam at the upper part of the foundation pit. The specific construction process for installing the load-bearing bracket and dismantling the internal support includes:

[0049] (1) Connect the lower triangular bracket and the spreader beam;

[0050] A spreader beam 11 is installed on the top of the inner support beam at the upper part of the base fertilizer trough 8. Both ends of the spreader beam 11 are suspended by a lower triangular bracket 2. The lower triangular bracket 2 is formed by welding a vertical rod 21, a horizontal beam 22 and a diagonal brace 23. The vertical rod 21 of the lower triangular bracket 2 is connected and fixed to the steel plate connecting plate 13 and the first stiffening plate 14 welded to the end of the spreader beam 11 by bolts 24.

[0051] (2) Install the anchor bolts for the spreader beam;

[0052] Anchor beams 12 are welded to the inner sides of both ends of the spreader beam 11. The anchor beams 12 extend along the length of the inner support beam 5. One end of the anchor beam 12 is welded to the side of the spreader beam 11, and the other end of the anchor beam 12 is fixed to the crown beam 6 by anchor bolts 15.

[0053] (3) Install vertical and horizontal scissor bracing;

[0054] The vertical scissor brace 31 is installed vertically between the two lower triangular brackets 2. The end of the vertical scissor brace 31 is fixed to the scissor brace connecting plate 28 welded to the inner side of the vertical rod 21 by a shaft pin. The horizontal scissor brace 32 is installed horizontally between the two lower triangular brackets 2. The end of the horizontal scissor brace 32 is equipped with a pin. The steel sleeve 29 welded on the crossbeam 22 is equipped with a scissor brace connecting plate 291. The pin is inserted into the pin hole on the scissor brace connecting plate 291 to connect the horizontal scissor brace 32 with the scissor brace connecting plate 291.

[0055] (4) Install adjustable top supports and beams;

[0056] Four adjustable top supports 41 are respectively installed on the steel sleeves 29 located at both ends of the crossbeam 22. Two support beams 42 are installed on top of the adjustable top supports 41. The support beams 42 extend along the width direction of the inner support beam 5. The adjustable top supports 41 are adjusted so that the support beams 42 tighten the concrete structure of the inner support beam.

[0057] (5) Adjust the adjustable support;

[0058] When the side wall structure of the foundation pit support is uneven, the adjustable support 26 installed at the lower end of the vertical rod 21 can be adjusted so that the adjustable support 26 is supported on the side wall of the foundation pit support structure.

[0059] (6) Cut and remove the mid-span inner support beam;

[0060] Before removing the internal support beam, determine the cutting position based on the underlying heavy-duty supports or load-bearing brackets to ensure that after the concrete structure of the internal support beam is cut, it rests on at least two support beams, and the cantilever lengths at both ends remain balanced. Figure 1 The demolition direction indicated by the arrow is to first cut the inner support beam in the middle of the span, and then extend it segment by segment towards the foundation pit support structure.

[0061] (7) Cut and remove the end inner support beam;

[0062] When cutting and removing the end inner support beam, the support beam 42 is located inside the inner support beam cutting line 51 to ensure that the concrete support beam can be stably supported after cutting.

[0063] (8) Remove the load-bearing bracket after cutting.

[0064] The above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the claims of the present utility model should be covered by the claims of the present utility model.

Claims

1. A load-bearing bracket for cutting and dismantling internal supports in foundation pits, characterized in that, include: A spreader beam assembly includes a spreader beam and anchor beams welded to the inner sides of both ends of the spreader beam. The spreader beam is installed on top of an inner support beam and extends along the width direction of the inner support beam. The anchor beams extend along the length direction of the inner support beam, with one end welded to the side of the spreader beam and the other end fixed to the crown beam by anchor bolts. Two lower triangular brackets are installed on both sides of the inner support beam. Each lower triangular bracket is formed by welding a vertical rod, a horizontal beam, and a diagonal brace. The upper end of the vertical rod is connected and fixed to the spreader beam, and its lower end is connected in sequence to the horizontal beam and the diagonal brace located below the inner support beam. The lower end of the vertical rod is provided with a fixed support, which abuts against the side wall of the foundation pit support structure. A scissor brace assembly is connected between two lower hanging triangular brackets. The scissor brace assembly includes a vertical scissor brace installed in the vertical direction and a horizontal scissor brace installed in the horizontal direction. The load-bearing and force-transmitting component includes adjustable top supports installed on the crossbeams of two lower triangular brackets and a support beam installed on top of the adjustable top supports. The support beam extends along the width direction of the inner support beam. The adjustable top supports are adjusted so that the support beam is pressed tightly against the bottom of the inner support beam, so as to transfer the overall vertical load of the inner support beam after it is cut to the lower triangular brackets, and then to the side wall of the foundation pit support structure and the cap beam through the lower triangular brackets and the spreader beam assembly, respectively.

2. The load-bearing bracket for cutting and dismantling internal supports of the foundation pit support according to claim 1, characterized in that, The two ends of the spreader beam are welded with steel plate connecting plates and first stiffening plates, which are connected and fixed to the upper end of the vertical rod by bolts.

3. The load-bearing bracket for cutting and dismantling internal supports of the foundation pit support according to claim 1, characterized in that, An adjustable support is provided at the lower end of the vertical rod. The adjustable support is arranged parallel to the fixed support. When the side wall of the foundation pit support structure is uneven, the lower triangular bracket abuts against the side wall of the foundation pit support structure through the adjustable support.

4. The load-bearing bracket for cutting and dismantling the internal support of the foundation pit as described in claim 3, characterized in that, The adjustable support consists of a first screw and a cross wrench. The first screw passes through the first and second limiting plates welded to both sides of the vertical rod and is threadedly connected to a nut welded to the outside of the second limiting plate. The cross wrench is adjusted so that the first screw abuts against the side wall of the foundation pit support.

5. The load-bearing bracket for cutting and dismantling the internal support of the foundation pit as described in claim 1, characterized in that, A second stiffening plate is provided at the stress-bearing node where the crossbeam and the vertical rod connect. One side of the second stiffening plate is welded and fixed to the crossbeam, and the other side of the plate is welded and fixed to the vertical rod.

6. The load-bearing bracket for cutting and dismantling internal supports of the foundation pit support according to claim 5, characterized in that, The second stiffening plate consists of two pieces, which are symmetrically welded to the top and bottom of the crossbeam.

7. The load-bearing bracket for cutting and dismantling internal supports of the foundation pit support according to claim 1, characterized in that, Ladder steps are welded to the outside of the vertical rod.

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