Building foundation pit supporting structure

Abstract

The invention provides a building foundation pit supporting structure. The building foundation pit supporting structure comprises a clamping mechanism and a telescopic connecting rod. The telescopic connecting rod is adjusted to change length; the clamping mechanism is mounted at the joint of the tops of the two row piles which are tightly arranged; at least two first supporting columns are fixedly arranged at the top of each clamping mechanism, and the first supporting columns of the two clamping mechanisms can be connected through a telescopic connecting rod with the proper length. Detachable hanging frames are arranged on the clamping mechanisms and extend downwards, the sides, close to the row piles, of the hanging frames are tightly attached to the row piles, at least two second supporting columns are fixedly arranged on the sides, away from the row piles, of the bottoms of the hanging frames, and the second supporting rods of the two hanging frames are connected through telescopic connecting rods with the proper length; connecting structural components are additionally arranged on the tops of the row piles, connection between the tops of the row piles is enhanced, and therefore building and installing conditions are provided for auxiliary supporting of other parts, and the overall supporting effect is enhanced. And the whole structure is simple, disassembly and assembly are convenient, and working efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the field of foundation pit support, and more particularly to a building foundation pit support structure. Background Art

[0002] Foundation pit support is a measure used to support, reinforce, and protect the side walls of the foundation pit and its surroundings to ensure the safety of underground structure construction and the surrounding environment. Currently, most support structures are formed by closely arranging piles in rows to form block-shaped support areas. Some structures require the installation of transverse frame beams between the rows of piles. For the corners of the foundation pit or the positions of piles on opposite sides, top support beams are also required to enhance the overall support effect.

[0003] The installation of the above-mentioned frame beams and frame beams is mostly fixed by bolts, and some even need to be fixed by welding. The installation and disassembly are relatively troublesome, affecting the overall construction progress; moreover, most of the added auxiliary support structures are for the middle or bottom position of the pile row, and lack of connection reinforcement at the top position, which also needs to be improved. Summary of the Invention

[0004] In order to overcome the defects of the prior art, the technical problem to be solved by the present invention is to propose a building foundation pit support structure, which adds connecting structural components to the top of the pile rows, strengthens the connection between the tops of the pile rows, and provides conditions for the construction and installation of auxiliary supports for other parts, so as to enhance the overall support effect; and the overall structure is simple, easy to disassemble and assemble, and can improve work efficiency.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] The present invention provides a building foundation pit support structure, comprising a row of piles that are closely arranged and inserted into the wall of the foundation pit; comprising a clamping mechanism and a telescopic connecting rod; the telescopic connecting rod can be adjusted to change its length; the clamping mechanism is installed at the junction of the tops of two closely arranged rows of piles; at least two first support columns are fixedly provided on the top of the clamping mechanism, and the first support columns of the two clamping mechanisms can be connected by a telescopic connecting rod of appropriate length; a detachable hanging bracket is provided on the clamping mechanism, and the hanging bracket extends downward, and the side of the hanging bracket close to the row of piles is tightly attached to the row of piles, and at least two second support columns are fixedly provided on the side of the bottom of the hanging bracket away from the row of piles, and the second support rods of the two hanging brackets are connected by a telescopic connecting rod of appropriate length.

[0007] In a preferred technical solution of the present invention, the clamping mechanism includes a support frame and a locking assembly; the first support column is fixedly arranged on the top surface of the support frame; one side of the support frame is open, and a block is installed at the open mouth; the other side of the support frame is fixedly provided with a clamping groove, the notch of the clamping groove is set downward, and is T-shaped, and is adapted to the shape of the junction of the tops of the two rows of piles; a first through-hole is penetrated through the side of the support frame away from the open mouth, and a second through-hole is provided on the top surface of the support frame, and the locking assembly is installed inside the support frame, the lock tongue of the locking assembly extends out through the first through-hole, and the handle for unlocking the locking assembly extends out of the top of the support frame through the second through-hole, and the lock tongue of the locking assembly is retracted and unlocked by dragging the handle; a socket corresponding to the position of the first through-hole is provided on the top of the row of piles.

[0008] In a preferred technical solution of the present invention, the locking assembly includes a pushing member, a spring, and a handle; the pushing member includes a first pushing block, the first pushing block is close to the bottom of the wall of the clamping groove and is inclined toward the side away from the clamping groove; push plates are fixed at both ends of the first pushing block, and a lock tongue is fixed on the wall of the push plate close to the clamping groove, and the lock tongue is passed through the first through-hole; a second pushing block is installed at the bottom of the side of the handle away from the clamping groove, the second push block is away from the bottom of the wall of the clamping groove and is inclined toward the side away from the clamping groove, and the second push block is adapted to slide with the inclined surface of the first push block; the spring clamp is arranged between the push plate and the stop block to provide elastic force for the pushing member to push outward.

[0009] In a preferred technical solution of the present invention, a first clamping block is fixedly provided on the wall of the push plate away from the lock tongue, and a second clamping block is correspondingly fixed on the wall of the stop block. The second clamping block and the first clamping block are both columnar structures, and the diameters are adapted to the inner diameter of the spring; the two ends of the spring are respectively sleeved on the outside of the first clamping block and the second clamping block; a guide rod is fixedly provided in the middle of the first clamping block, and a guide hole is provided at the second clamping block. The aperture of the guide hole is adapted to the diameter of the guide rod, and the guide rod slides along the guide hole.

[0010] In a preferred technical solution of the present invention, the hanging rack includes an L-shaped bracket, a frame is fixedly provided on the top of the bracket, and the side of the frame close to the support frame is open; a third through-hole is provided on the top surface of the frame corresponding to the first support column, the frame is hung on the first support column through the third through-hole, the frame is covered on the outside of the support frame, and a distance greater than the length of the first support column is left between the bottom of the frame and the bottom surface of the support frame; the bracket is arranged close to the wall surface of the row of piles; the second support column is fixed to the top surface of the outward-turned side of the bottom of the bracket.

[0011] In a preferred technical solution of the present invention, the telescopic connecting rod includes a sleeve and two threaded rods. The ends of the threaded rods are fixed with sleeves, and the inner diameter of the sleeves is adapted to the diameters of the first support column and the second support column; the inner wall of the sleeve is provided with threads, and the two threaded rods are respectively threadedly connected to the two ends of the sleeve.

[0012] In a preferred technical solution of the present invention, the outer wall of the sleeve is a hexagonal column structure, a convex ring is fixedly provided at the center of the outer wall of the sleeve, and the outer wall of the convex ring is a hexagonal structure; a through hole is provided on the convex ring that penetrates two opposite side walls.

[0013] In a preferred technical solution of the present invention, a convex strip is fixed on the inner side of the bottom corner of the hanger, the spacing between the convex strip and the second support column is adapted to the wall thickness of the sleeve, and the convex strip is chamfered near the top edge of the second support column.

[0014] The beneficial effects of the present invention are:

[0015] The present invention provides a construction foundation pit support structure, comprising a clamping mechanism and a telescopic connecting rod. The clamping mechanism is installed at the junction of the tops of two closely arranged rows of piles. At least two first support columns are fixedly provided on the top of the clamping mechanism, and the first support columns of the two clamping mechanisms can be connected by a telescopic connecting rod of appropriate length. The clamping mechanism is a structure installed on the top of the pile row, and the first support columns thereon can be connected by the telescopic connecting rod, thereby strengthening the connection between the tops of the pile rows.

[0016] In addition, a detachable hanging bracket is provided on the clamping mechanism, which extends downward, and the side of the hanging bracket close to the row of piles is close to the row of piles, and at least two second support columns are fixedly provided on the side of the bottom of the hanging bracket away from the row of piles, and the second support rods of the two hanging brackets are connected by a telescopic connecting rod of appropriate length; it can strengthen the connection between the rows of piles in the same row, or push and support the opposite rows of piles or the rows of piles on both sides of the corners, and use the clamping mechanism to provide conditions for the construction and installation of auxiliary supports in other parts, so as to enhance the overall support effect; and the overall structure is simple, and the matching connection method between the clamping mechanism and the telescopic connecting rod is simple, which makes the overall construction and disassembly more convenient, and can improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of a building foundation pit support structure provided in a specific embodiment of the present invention;

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the clamping mechanism and the hanging bracket provided in a specific embodiment of the present invention;

[0019] Figure 3 is a schematic diagram of the three-dimensional structure of the clamping mechanism provided in a specific embodiment of the present invention from a first perspective;

[0020] Figure 4 is a schematic diagram of the three-dimensional structure of the clamping mechanism provided in a specific embodiment of the present invention from a second perspective;

[0021] Figure 5is a schematic diagram of a three-dimensional unfolded structure of a clamping mechanism provided in a specific embodiment of the present invention from a first viewing angle;

[0022] Figure 6 is a schematic diagram of a three-dimensional unfolded structure of a clamping mechanism provided in a specific embodiment of the present invention from a second viewing angle;

[0023] Figure 7 is a cross-sectional view of a clamping mechanism provided in a specific embodiment of the present invention;

[0024] Figure 8 is a schematic diagram of the three-dimensional structure of a push member provided in a specific embodiment of the present invention;

[0025] Figure 9 is a schematic diagram of the three-dimensional structure of a rack provided in a specific embodiment of the present invention;

[0026] Figure 10 It is a schematic diagram of the three-dimensional structure of the telescopic connecting rod provided in a specific embodiment of the present invention.

[0027] In the picture:

[0028] 100, pile row; 110, socket;

[0029] 200, clamping mechanism; 210, support frame; 211, first through-hole; 212, second through-hole; 220, first support column; 230, stopper; 231, second clamping block; 232, guide hole; 240, clamping groove;

[0030] 300, telescopic connecting rod; 310, sleeve; 311, convex ring; 312, through hole; 320, threaded rod; 330, sleeve; 400, hanger; 410, second support rod; 420, bracket; 430, frame; 440, third through hole; 450, convex strip; 500, locking assembly; 510, push member; 511, first push block; 512, push plate; 513, lock tongue; 514, first clamping block; 515, guide rod; 520, spring; 530, handle; 531, second push block. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0032] like Figures 1 to 3As shown, a specific embodiment of the present invention discloses a building foundation pit support structure, including a pile row 100 that is closely arranged and inserted into the foundation pit wall; including a clamping mechanism 200 and a telescopic connecting rod 300; the telescopic connecting rod 300 changes its length by adjustment; the clamping mechanism 200 is installed at the top connection of two closely arranged pile rows 100; at least two first support columns 220 are fixedly provided on the top of the clamping mechanism 200, and the first support columns 220 of the two clamping mechanisms 200 can be connected by a telescopic connecting rod 300 of appropriate length; a detachable hanging bracket 400 is provided on the clamping mechanism 200, and the hanging bracket extends downward, and the side of the hanging bracket close to the pile row is close to the pile row, and at least two second support columns 410 are fixedly provided on the side of the bottom of the hanging bracket 400 away from the pile row, and the second support rods 410 of the two hanging brackets 400 are connected by a telescopic connecting rod 300 of appropriate length.

[0033] In the above-mentioned construction foundation pit support structure, the clamping mechanism is a structure installed on the top of the pile row, and the first support columns thereon can be connected by a telescopic connecting rod, which can strengthen the connection between the tops of the pile rows;

[0034] In addition, the clamping mechanism is provided with a detachable hanging bracket, and the second support rods of the hanging bracket are connected by a telescopic connecting rod of appropriate length; it can strengthen the connection between the rows of piles in the same row, or push and support the rows of piles in the opposite direction or on both sides of the corner, and use the clamping mechanism to provide conditions for the construction and installation of auxiliary supports in other parts, so as to enhance the overall support effect; and the overall structure is simple, and the matching connection method between the clamping mechanism and the telescopic connecting rod is simple, which makes the overall construction and disassembly more convenient and can improve work efficiency.

[0035] Further, if Figures 3 to 8 As shown, the clamping mechanism 200 includes a support frame 210 and a locking assembly 500; a first support column 220 is fixedly mounted on the top surface of the support frame 210; one side of the support frame 210 is open, and a stopper 230 is installed at the open end; a clamping groove 240 is fixedly mounted on the other side of the support frame 210, and the notch of the clamping groove is downwardly arranged and T-shaped, which is adapted to the shape of the junction of the tops of the two rows of piles; the clamping groove is used to clamp the top connection parts of two closely adjacent rows of piles, thereby strengthening the connection between the two rows of piles and at least preventing the two rows of piles from loosening and deviating.

[0036] A first through-hole 211 is provided on the side of the support frame 210 away from the open mouth, and a second through-hole 212 is provided on the top surface of the support frame 210. The locking assembly 500 is installed inside the support frame 210, and the lock tongue 513 of the locking assembly 500 extends through the first through-hole 211. The handle 530 for unlocking the locking assembly 500 extends through the second through-hole 212 from the top of the support frame 210. The lock tongue of the locking assembly is retracted and unlocked by dragging the handle. The top of the pile 100 is provided with a socket 110 corresponding to the position of the first through-hole 211. Through the two locks The tongues are respectively inserted into the sockets of two adjacent rows of piles, and are clamped at the intersection of the two rows of piles based on the clamping groove, so that the clamping mechanism can be firmly clamped and installed at the top connection of the two rows of piles, effectively preventing loosening, and providing a support basis for the subsequent construction of other structural components; and, the unlocking method is dragging the handle, which can conform to the action of lifting the entire clamping mechanism, which means that only when the handle is lifted, the lock tongue will be retracted and the clamping groove will be in a fully open state, which just matches the action of clamping and installing the clamping mechanism on the row of piles, or removing it from the row of piles.

[0037] Furthermore, if Figures 5 to 8 As shown, the locking assembly 500 includes a pushing member 510, a spring 520, and a handle 530; the pushing member 510 includes a first pushing block 511, the bottom of the wall of the first pushing block close to the clip groove is inclined toward the side away from the clip groove; push plates 512 are fixedly provided at both ends of the first pushing block 511, and a locking tongue 513 is fixedly provided on the wall of the pushing plate 512 close to the clip groove 240, and the locking tongue 513 is penetrated at the first through-hole 211; a second pushing block 531 is installed at the bottom of the side of the handle 530 away from the clip groove 240, and the bottom of the wall of the second pushing block away from the clip groove is inclined toward the side away from the clip groove, and the second pushing block 531 is adapted to slide with the inclined surface of the first pushing block 511; the spring The spring 520 is clamped between the push plate 512 and the stop block 230, providing the push piece with elastic force to push outward; the overall structure and working principle are relatively simple, and the direction of the force is changed by sliding two inclined surfaces. When the handle is pulled, the second push block is driven to move upward, which will naturally push the first push block away from the clamping groove, overcoming the elastic force of the spring, causing the lock tongue to retract, and the clamping groove is in a fully open state. Only then can the clamping groove be clamped on the top of the pile row or detached from the top of the pile row, and the operation is simple; and the overall assembly structure is adopted, which can facilitate the processing and production of various structural components, and also facilitate the subsequent disassembly and replacement of parts.

[0038] Furthermore, a first clamping block 514 is fixedly provided on the wall of the push plate 512 away from the lock tongue 513, and a second clamping block 231 is correspondingly fixed on the wall of the stop block 230. The second clamping block and the first clamping block are both column-shaped structures, and their diameters are adapted to the inner diameter of the spring; the two ends of the spring 520 are respectively sleeved on the outside of the first clamping block 514 and the second clamping block 231; a guide rod 515 is fixedly provided in the middle of the first clamping block 514, and a guide hole 232 is provided at the second clamping block 231. The aperture of the guide hole is adapted to the diameter of the guide rod, and the guide rod slides along the guide hole; this structural design can further limit the movement of the push piece, so that the push piece moves smoothly, and can also provide a basis for limiting the deformation of the spring to prevent the spring from being damaged due to irregular deformation; wherein, the edge of the end of the lock tongue is chamfered, which can facilitate the lock tongue to pass through the insertion hole of the pile.

[0039] Furthermore, if Figure 9 As shown, the hanger 400 includes an L-shaped bracket 420, a frame 430 is fixed on the top of the bracket 420, and the side of the frame 430 close to the support frame 210 is open; the top surface of the frame 430 is provided with a third through-hole 440 corresponding to the first support column 220, and the frame is hung on the first support column through the third through-hole, and the frame is covered on the outside of the support frame, and a gap greater than the length of the first support column is left between the bottom of the frame and the bottom surface of the support frame; the bracket 420 is set close to the wall surface of the pile row 100; the second support column 410 is fixed to the top surface of the bottom outward side of the bracket 420; the overall structure is simple, and it is connected to the clamping mechanism by hanging. As a separate structural component, it is convenient for processing and production, and it is also convenient to make corresponding adjustments according to actual needs. ; Among them, the bracket is close to the row of piles, and the force pushing the second support column in the direction of the bracket can be transferred to the row of piles, thereby strengthening the support effect; since the bracket is set close to the row of piles, considering the installation conditions and methods of the bracket, the frame to be set needs to take into account the position occupied by the support frame, so one side of the frame is limited to be open, and there is enough space at the bottom; more specifically, when the bracket is hung and installed, the bracket is first pressed against the row of piles so that the top surface of the frame is higher than the top surface of the first support column, and then the frame is covered on the outside of the support frame by horizontal movement, and the position of the third through-hole corresponds to the position of the first support column, and then the bracket is moved downward so that the first support column passes through the third through-hole, and the top inner wall of the frame presses against the top surface of the support frame to complete the assembly.

[0040] Furthermore, a chamfer is provided at the top edge of the first support column, which can facilitate the first support column to pass through the third through-hole and facilitate the hanging installation of the bracket.

[0041] Furthermore, a plurality of reinforcing ribs are fixed at the connection between the top of the bracket and the bottom of the frame. The plurality of reinforcing ribs are evenly spaced along the width direction of the bracket, effectively strengthening the connection between the bracket and the frame, thereby strengthening the structural strength of the entire hanger and strengthening the overall supporting strength.

[0042] Further, if Figure 10 As shown, the telescopic link 300 includes a sleeve 310 and two threaded rods 320. The ends of the threaded rods 320 are fixed with sleeves 330, and the inner diameter of the sleeve 330 is adapted to the diameters of the first support column 220 and the second support column 410; the inner wall of the sleeve is provided with threads, and the two threaded rods 320 are respectively threadedly connected to the two ends of the sleeve 310; the threaded connection method is simple in structure, easy to operate, and can provide sufficient connection strength; it should be noted that the application stroke of the telescopic link can adjust the length of the sleeve according to actual needs, and can meet the needs of different support ranges.

[0043] Furthermore, the outer wall of the sleeve 330 is a hexagonal column structure, and a convex ring 311 is fixedly provided at the center of the outer wall of the sleeve 330, and the outer wall of the convex ring is a hexagonal structure; the convex ring 311 is provided with a through hole 312 that passes through the two opposite side walls; in the process of adjusting the tightness of the telescopic connecting rod, the sleeve needs to be twisted. The above structural limitations are all designed to facilitate the rotation of the sleeve. The sleeve or the convex ring can be clamped for rotation, or an insert can be inserted into the through hole and the sleeve can be rotated using the insert as a gripping part, which is convenient for disassembly and assembly and convenient for actual construction operations.

[0044] Further, if Figure 9 As shown, a ridge 450 is fixedly provided on the inner side of the bottom corner of the hanger 400. The distance between the ridge 450 and the second support column 410 is adapted to the wall thickness of the sleeve 330. The ridge is chamfered near the top edge of the second support column. The second support column, in addition to the case of some telescopic connecting rods in the same row, is mostly used as a force-bearing part of the top support. The ridge can support the outer wall of the sleeve of the telescopic connecting rod, disperse the force on the second support column, and better transmit the force to the bracket and pile row, thereby providing a more stable support effect.

[0045] More specifically, during the construction and use process, it is necessary to adjust the corresponding structural coordination mode according to different needs; for example, for the corners of the foundation pit, it is necessary to install clamping mechanisms on the piles on both sides of the corners of the foundation pit, and a hanger is hung on the clamping mechanism; the two clamping mechanisms here are provided with telescopic connecting rods between the first support column and the second support column near the corner, and the telescopic connecting rods are adjusted to be in an outward supporting state, thereby providing a pushing and reinforcing support effect for the piles at this position; in addition, for some foundation pit environments where the two opposite side walls are close, the telescopic connecting rods installed between the opposite clamping mechanisms are also adjusted in an outward supporting manner to further enhance the support effect of the foundation pit;

[0046] For piles arranged in the same direction, a telescopic connecting rod can also be installed between the first support column and the second support column of two adjacent clamping mechanisms, and the telescopic connecting rod adopts a connection method of being tightened toward the center of the sleeve, which further strengthens the connection strength between the piles and also strengthens the overall support effect; and for some foundation pits that are not deep or the soil is hard, the demand for secondary support of the piles is not high, and only a clamping mechanism can be set without a hanger, or the number of hangers used can be reduced, or the spacing between the clamping mechanisms can be extended to reduce the use of the above structures. While meeting the required support effect, the number of disassembly and assembly can be reduced, and the work intensity can be reduced.

[0047] The present invention is described through preferred embodiments. Those skilled in the art will appreciate that various modifications or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A building foundation pit support structure comprising closely arranged rows of piles inserted into the foundation pit wall; characterized in that: It includes a clamping mechanism and a telescopic connecting rod; The telescopic connecting rod can be adjusted to change its length; The clamping mechanism is installed at the junction of the tops of two closely arranged rows of piles; At least two first support columns are fixedly provided on the top of the clamping mechanism, and the first support columns of the two clamping mechanisms can be connected by a telescopic connecting rod of appropriate length; The clamping mechanism is provided with a detachable hanger, which extends downward. The side of the hanger close to the row of piles is close to the row of piles. At least two second support columns are fixed on the side of the bottom of the hanger away from the row of piles. The second support rods of the two hangers are connected by a telescopic connecting rod of appropriate length.

2. A construction foundation pit support structure according to claim 1, characterized in that: The clamping mechanism includes a support frame and a locking assembly; The first support column is fixedly arranged on the top surface of the support frame; One side of the support frame is open, and a block is installed at the open end; the other side of the support frame is fixed with a clamping groove, the notch of the clamping groove is set downward and is T-shaped, which is adapted to the shape of the junction of the tops of the two rows of piles; A first through-hole is formed on a side of the support frame away from the open opening, and a second through-hole is formed on the top surface of the support frame. The locking assembly is mounted inside the support frame, a lock tongue of the locking assembly extends through the first through-hole, and a handle for unlocking the locking assembly extends through the second through-hole out of the top of the support frame. The lock tongue of the locking assembly is retracted and unlocked by pulling the handle. The top of the pile row is provided with an insertion hole corresponding to the first perforation position.

3. A construction foundation pit support structure according to claim 2, characterized in that: The locking assembly includes a push piece, a spring, and a handle; The pushing member includes a first pushing block, wherein the bottom of the wall surface of the first pushing block close to the clamping groove is inclined toward the side away from the clamping groove; push plates are fixedly provided at both ends of the first pushing block, and a lock tongue is fixedly provided on the wall surface of the push plate close to the clamping groove, and the lock tongue is inserted into the first through hole; A second push block is installed at the bottom of the side of the handle away from the clamping groove. The bottom of the wall of the second push block away from the clamping groove is inclined toward the side away from the clamping groove. The second push block is adapted to slide with the inclined surface of the first push block. The spring clamp is arranged between the push plate and the stop block to provide elastic force for the push piece to push outward.

4. A construction foundation pit support structure according to claim 3, characterized in that: A first clamping block is fixedly provided on the wall of the push plate away from the lock tongue, and a second clamping block is fixedly provided on the wall of the stop block. Both the second clamping block and the first clamping block are columnar structures, and their diameters are adapted to the inner diameter of the spring; the two ends of the spring are respectively sleeved on the outside of the first clamping block and the second clamping block; A guide rod is fixedly provided at the middle of the first clamping block, and a guide hole is provided at the second clamping block. The diameter of the guide hole is adapted to the diameter of the guide rod, and the guide rod slides along the guide hole.

5. A construction foundation pit support structure according to claim 2, characterized in that: The hanging rack includes an L-shaped bracket, a frame is fixed on the top of the bracket, and the side of the frame close to the support frame is open; A third through-hole is provided on the top surface of the frame corresponding to the first support column. The frame is hung on the first support column through the third through-hole. The frame covers the outside of the support frame. A gap greater than the length of the first support column is left between the bottom of the frame and the bottom surface of the support frame. The bracket is set close to the wall surface of the pile row. The second supporting column is fixedly arranged on the top surface of the outward-turned side of the bottom of the bracket.

6. A construction foundation pit support structure according to claim 5, characterized in that: The telescopic connecting rod includes a sleeve and two threaded rods. The ends of the threaded rods are fixed with sleeves, and the inner diameter of the sleeves is adapted to the diameters of the first support column and the second support column. The inner wall of the sleeve is provided with threads, and the two threaded rods are respectively connected and matched with the threads at both ends of the sleeve.

7. A construction foundation pit support structure according to claim 6, characterized in that: The outer wall of the sleeve is a hexagonal column structure, and a convex ring is fixedly provided at the center of the outer wall of the sleeve, and the outer wall of the convex ring is a hexagonal structure; The convex ring is provided with a through hole penetrating two opposite side walls.

8. The construction foundation pit support structure according to claim 6, characterized in that: A convex strip is fixed on the inner side of the bottom corner of the hanger. The distance between the convex strip and the second support column is adapted to the wall thickness of the sleeve. The top edge of the convex strip near the second support column is chamfered.

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