Deep foundation pit supporting structure

Abstract

The invention relates to a deep foundation pit supporting structure which comprises a stress plate and an inclined supporting rod which abut against the side wall of a foundation pit, the stress plate is provided with a connecting structure, the connecting structure comprises a compaction plate and an inserting rod which are movably connected to the stress plate, the compaction plate can be inserted into a soil layer of the foundation pit and is connected to the stress plate in a lifting mode, and the inserting rod is connected to the stress plate in a lifting mode. The upper portion of the inclined supporting rod is bent, extends and is inserted into the compaction plate, and the lower portion of the inclined supporting rod is inclined and abuts against the ground. And the inserting rod is positioned below the compacting plate and is inserted and positioned in the soil layer of the foundation pit. The compaction plate is inserted into the foundation pit soil layer, the inclined supporting rods are inserted into the upper portion of the compaction plate to enable the compaction plate to descend, the foundation pit soil layer is longitudinally compacted, then the insertion rods are horizontally inserted and positioned in the foundation pit soil layer, and therefore the compactness of the side wall of the foundation pit at the position of the stress plate is improved, and tight connection with the foundation pit soil layer is achieved through the compaction plate and the insertion rods; and the supporting stability of the stress plate to the side wall of the foundation pit is improved.

Description

Technical Field

[0001] The present application relates to the technical field of foundation pit construction, and in particular to a deep foundation pit support structure. Background Art

[0002] Deep foundation pit support refers to the measures of support, reinforcement and protection of the side walls of deep foundation pits and the surrounding environment to ensure the safety of underground structure construction and the surrounding environment of the foundation pit. At present, the commonly used support structures for deep foundation pits mainly include underground continuous walls, channel steel sheet piles, pile rows, anchor support, soil nail walls, etc.

[0003] In the related art, a Chinese patent with announcement number CN207597398U discloses a foundation pit support structure, which includes a load-bearing plate and an inclined support rod. A transverse reinforcement column is fixedly arranged in the middle and upper part of the load-bearing plate, and cast-in-place piles are arranged in the foundation pit. The lower end of the inclined support rod is fixedly connected to the top end of the cast-in-place pile, and the upper end of the inclined support rod is fixedly connected to the transverse reinforcement column.

[0004] With respect to the above-mentioned related technologies, the applicant believes that in some current foundation pit support structures, the load-bearing plates only abut against the side walls of the foundation pit, and the supporting stability of the side walls of the foundation pit is not high, which still needs to be improved. Summary of the invention

[0005] In order to improve the supporting stability of the load-bearing plate on the side wall of the foundation pit, the present application provides a deep foundation pit support structure.

[0006] The deep foundation pit support structure provided in this application adopts the following technical solution: A deep foundation pit support structure comprises a load-bearing plate and an inclined support rod abutting against the side wall of the foundation pit, a connecting structure is provided on the load-bearing plate, the connecting structure comprises a compaction plate and a plug-in rod respectively movably connected to the load-bearing plate, the compaction plate can be inserted into the foundation pit soil layer and the compaction plate is lifted and connected to the load-bearing plate, the upper part of the inclined support rod is bent, extended and plugged into the compaction plate, and the lower part of the inclined support rod is inclined and abutted against the ground; the plug-in rod is located below the compaction plate and is inserted and positioned in the foundation pit soil layer.

[0007] By adopting the above technical scheme, the compaction plate is inserted into the foundation pit soil layer, and the oblique support rod is inserted into the upper part of the compaction plate to make the compaction plate descend, thereby compacting the foundation pit soil layer in the longitudinal direction, making it easy for the plug-in rod located at the lower part of the compaction plate to be horizontally inserted and stably positioned in the foundation pit soil layer, thereby improving the compactness of the foundation pit side wall at the force-bearing plate, and easily improving the fit between the overall force-bearing plate and the foundation pit side wall through horizontal plugging of the plug-in rod, and achieving a close connection with the foundation pit soil layer through the compaction plate and the plug-in rod, thereby improving the support stability of the force-bearing plate on the foundation pit side wall.

[0008] Preferably, the connection structure also includes barbs and a driving rod which are movably connected to the plug-in rod respectively, the barbs are arranged opposite to each other in the plug-in rod, and the relative barbs are connected by a connecting spring; the driving rod is inserted between the relative barbs, and the relative barbs can be penetrated outside the plug-in rod and inserted into the soil layer of the foundation pit; a through hole corresponding to the end of the driving rod is opened on the outside of the plug-in rod.

[0009] By adopting the above technical solution, after the connecting rod is inserted into the foundation pit soil layer, the construction personnel further use a screwdriver or the like to correspondingly drive the rod and hit it from the outside, and then the driving rod drives the relative barbs to overcome the force of the connecting spring and move in opposite directions, thereby the barbs are then obliquely inserted into the foundation pit soil layer, thereby improving the plug-in stability of the connecting rod.

[0010] Preferably, one end of the barb away from the force-bearing plate is rotatably connected to the plug-in rod, and the other end is shaped like a spike and penetrates outside the plug-in rod and is inserted into the foundation pit soil layer.

[0011] By adopting the above technical solution, one end of the barb is rotatably connected to the plug-in rod to realize the rotation of the other end and maintain the connection with the plug-in rod; the other sharp spike-shaped end of the barb is easier to insert into the foundation pit soil layer to realize plug-in.

[0012] Preferably, an extrusion part and a hammer part are formed on the upper part of the oblique support rod, the cross-section of the extrusion part is trapezoidal, and the upper bottom of the trapezoid is close to the compaction plate, the side of the extrusion part abuts against the compaction plate, and the hammer part is fixed to one side of the extrusion part close to the force-bearing plate.

[0013] By adopting the above technical solution, the hammer part is provided to make it easier for construction workers to hit from the outside, so that the extrusion part presses the compaction plate downward. During the descending process of the compaction plate, the foundation pit soil layer is also compacted downward.

[0014] Preferably, a movable groove for the compacting plate to move is provided in the force-bearing plate; the compacting plate is connected to the movable groove via a movable structure.

[0015] Preferably, the movable structure includes a movable block, a translation slot and a lifting slot, the movable block is fixed to the side wall of the compaction plate, the translation slot is laterally extended on the side wall of the movable slot, the lifting slot is longitudinally extended at one end of the translation slot, and the movable block moves along the translation slot and the lifting slot.

[0016] By adopting the above technical solution, the movable block moves along the transverse translation groove to realize the horizontal insertion of the compaction plate, and then the longitudinal compaction path of the compaction plate is guided by the setting of the lifting groove, making the process of compacting the foundation pit soil layer by the compaction plate more controllable.

[0017] Preferably, the compaction plates are respectively arranged at the four corners of the force-bearing plate, and the oblique support rods are respectively located on the outer sides of the two opposite compaction plates on the left and right; the upper part of the oblique support rod extends vertically, and the extrusion part and the hammer part extend horizontally at the upper and lower ends of the vertical extension section of the oblique support rod; the lower part of the oblique support rod extends obliquely and abuts the ground.

[0018] By adopting the above technical solution, the oblique support rod supports the extrusion part and the hammer part while providing oblique support, and can compact the compaction plates at the four corners of the load-bearing plate respectively. The structural setting is more practical and has a better supporting effect on deep foundation pits.

[0019] In summary, the present application includes at least one of the following beneficial technical effects: The compaction plate is inserted into the foundation pit soil layer, and the oblique support rod is inserted into the upper part of the compaction plate to make the compaction plate descend, thereby compacting the foundation pit soil layer in the longitudinal direction, making it easy for the plug-in rod located at the lower part of the compaction plate to be horizontally inserted and stably positioned in the foundation pit soil layer, thereby improving the compactness of the foundation pit side wall at the force-bearing plate, and it is easy to improve the fit between the entire force-bearing plate and the foundation pit side wall through the horizontal plug-in of the plug-in rod, and the compaction plate and the plug-in rod can be used to achieve a close connection with the foundation pit soil layer, thereby improving the support stability of the force-bearing plate on the foundation pit side wall; After the plug-in rod is inserted into the foundation pit soil layer, the construction personnel further use a screwdriver or the like to hit the corresponding driving rod from the outside, and then the driving rod drives the relative barbs to overcome the force of the connecting spring and move in opposite directions, thereby the barbs are obliquely inserted into the foundation pit soil layer, thereby improving the plug-in stability of the plug-in rod; The movable block moves along the transverse translation groove to realize the horizontal insertion of the compaction plate, and the longitudinal compaction path of the compaction plate is guided by the setting of the lifting groove, so that the process of compaction of the foundation pit soil layer by the compaction plate is more controllable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application; Figure 2 It is a schematic diagram of a partial explosion structure of the movable block on the compacting plate in the embodiment of the present application, which cooperates with the translation groove and the lifting groove; Figure 3 It is a schematic diagram of a local structure of the cooperation among the extrusion part, the hammering part and the compaction plate of the embodiment of the present application; Figure 4 It is a schematic cross-sectional structural diagram of the plug-in rod and the barb according to the embodiment of the present application.

[0021] Explanation of the reference numerals in the accompanying drawings: 1. force-bearing plate; 11. movable groove; 2. oblique support rod; 21. extrusion part; 22. hammering part; 3. connecting structure; 31. compaction plate; 32. plug-in rod; 321. through hole; 33. barb; 34. driving rod; 4. movable structure; 41. movable block; 42. translation groove; 43. lifting groove; 5. connecting spring. DETAILED DESCRIPTION

[0022] The present application is further described in detail below in conjunction with the accompanying drawings.

[0023] The present application embodiment discloses a deep foundation pit support structure, referring to Figure 1 , including a load-bearing plate 1 and an inclined support rod 2 abutting against the side wall of the foundation pit. A connecting structure 3 is provided on the load-bearing plate 1. The load-bearing plate 1 is stably installed on the side wall of the foundation pit through the connecting structure 3, and then the load-bearing plate 1 is tiltedly supported by the inclined support rod 2 to achieve stable support for the side wall of the foundation pit.

[0024] Reference Figure 1 The connection structure 3 includes a compaction plate 31 movably connected to the load-bearing plate 1 , the compaction plates 31 are respectively arranged at the four corners of the load-bearing plate 1 , and the oblique support rods 2 are respectively located on the outer sides of the two opposite compaction plates 31 on the left and right.

[0025] Reference Figure 1 , 2 A movable groove 11 for the compaction plate 31 to move is provided in the force-bearing plate 1; the compaction plate 31 is connected to the movable groove 11 through a movable structure 4; the movable structure 4 includes a movable block 41, a translation groove 42 and a lifting groove 43, the movable block 41 is fixed to the side wall of the compaction plate 31, the translation groove 42 is horizontally extended and arranged on the side wall of the movable groove 11, and the lifting groove 43 is longitudinally extended and arranged at one end of the translation groove 42, and the movable block 41 moves along the translation groove 42 and the lifting groove 43; the movable block 41 moves along the horizontal translation groove 42 to realize the horizontal insertion of the compaction plate 31 toward the side wall of the foundation pit, and then the longitudinal compaction path of the compaction plate 31 is guided by the setting of the lifting groove 43, so that the process of the compaction plate 31 compacting the foundation pit soil layer downward is more controllable; the compaction operation of the compaction plate 31 improves the compaction degree of the foundation pit soil layer.

[0026] Reference Figure 1 , 3 The upper part of the oblique support rod 2 extends vertically, and the upper and lower ends of the vertical extension section of the oblique support rod 2 extend horizontally to form an extrusion portion 21 and a hammering portion 22 respectively. The lower part of the oblique support rod extends obliquely and abuts against the ground; the extrusion portion 21 and the hammering portion 22 correspond to the compaction plate 31.

[0027] Reference Figure 1 , 3The cross-section of the extrusion part 21 is trapezoidal, and the upper bottom of the trapezoid is close to the compaction plate 31. The side of the extrusion part 21 abuts against the compaction plate 31. The hammer part 22 is fixed to the side of the extrusion part 21 close to the load-bearing plate 1. The construction personnel can use tools to hammer the hammer part 22 from the outside to make the extrusion part 21 squeeze the compaction plate 31 downward. In the process of the compaction plate 31 descending, the foundation pit soil layer is also compacted downward; the oblique support rod 2 supports the extrusion part 21 and the hammer part 22 while obliquely supporting, and can compact the compaction plates 31 at the four corners of the load-bearing plate 1 respectively. The structural setting is more practical and has a better supporting effect on deep foundation pits.

[0028] Reference Figure 1 , 4 The connection structure 3 also includes a plug-in rod 32 movably connected to the bottom of the compaction plate 31 and a barb 33 movably connected to the plug-in rod 32; the construction personnel can use a tool to hammer the plug-in rod 32 from the outside to insert it into the foundation pit soil layer; the barbs 33 are arranged opposite to each other in the plug-in rod 32, and the opposite barbs 33 are connected by a connecting spring 5; the opposite barb 33 is rotatably connected to the plug-in rod 32 at one end away from the force-bearing plate 1, and the other end is shaped like a spike and penetrates the outside of the plug-in rod 32 to be inserted into the foundation pit soil layer, and the spike-shaped end is easier to insert into the foundation pit soil layer for plugging.

[0029] Reference Figure 4 The connection structure 3 also includes a driving rod 34, which is inserted between the relative barbs 33 and is offset from the connecting spring 5. The driving rod 34 drives the relative barbs 33 to overcome the force of the connecting spring 5 and move in opposite directions. The relative barbs 33 can be inserted outside the plug-in rod 32 and inserted into the foundation pit soil layer to improve the plug-in stability of the plug-in rod 32; a through hole 321 corresponding to the end of the driving rod 34 is provided on the outside of the plug-in rod 32, and a cross groove is provided at the end of the driving rod 34, which can be aligned with the end of the driving rod 34 with a screwdriver or the like from the outside and hit.

[0030] The working process of the embodiment of the present application is: first, the force-bearing plate 1 is set on the side wall of the foundation pit, and the construction personnel use tools to hammer the compaction plate 31 so that it is horizontally inserted into the foundation pit, and then the inclined support rod 2 is placed correspondingly on the outside of the compaction plate 31, so that the extrusion part 21 is inserted above the compaction plate 31, and then the hammering part 22 is hammered so that the extrusion part 21 and the compaction plate 31 jointly compact the foundation pit soil layer. At the same time, the inclined support rod 2 is also more stably fixed on the force-bearing plate 1.

[0031] After compacting the compaction plates 31 at the four corners in turn, hit the plug rod 32 to make it insert horizontally into the foundation pit soil layer, and finally use a screwdriver or the like to align the end of the driving rod 34 from the outside and hit it, so that the driving rod 34 drives the relative barbs 33 to penetrate the outside of the plug rod 32 and insert into the foundation pit soil layer, thereby improving the plug-in stability of the plug rod 32, achieving a close connection between the load-bearing plate 1 and the foundation pit soil layer, and improving the support stability of the load-bearing plate 1 on the side wall of the foundation pit.

[0032] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A deep foundation pit support structure, comprising a load-bearing plate (1) abutting against the side wall of the foundation pit and an inclined support rod (2), characterized in that: The load-bearing plate (1) is provided with a connection structure (3), and the connection structure (3) comprises a compaction plate (31) and a plug-in rod (32) which are respectively movably connected to the load-bearing plate (1); the compaction plate (31) can be inserted into the soil layer of the foundation pit and the compaction plate (31) is connected to the load-bearing plate (1) by lifting and lowering; the upper part of the oblique support rod (2) is bent and extended and plugged into the compaction plate (31); the lower part of the oblique support rod (2) is inclined and abuts against the ground; the plug-in rod (32) is located below the compaction plate (31) and is inserted and positioned in the soil layer of the foundation pit.

2. A deep foundation pit support structure according to claim 1, characterized in that: The connection structure (3) also includes barbs (33) and a driving rod (34) which are respectively movably connected to the plug-in rod (32); the barbs (33) are arranged opposite to each other in the plug-in rod (32); the opposite barbs (33) are connected to each other via a connecting spring (5); the driving rod (34) is inserted between the opposite barbs (33); the opposite barbs (33) can be inserted outside the plug-in rod (32) and into the soil layer of the foundation pit; and a through hole (321) corresponding to the end of the driving rod (34) is opened on the outer side of the plug-in rod (32).

3. A deep foundation pit support structure according to claim 2, characterized in that: The opposite end of the barb (33) away from the force-bearing plate (1) is rotatably connected to the plug-in rod (32), and the other end is arranged in a spike shape outside the plug-in rod (32) and inserted into the foundation pit soil layer.

4. A deep foundation pit support structure according to claim 1, characterized in that: The upper part of the oblique support rod (2) is formed with an extrusion part (21) and a hammer part (22); the cross section of the extrusion part (21) is trapezoidal, and the upper bottom of the trapezoid is close to the compaction plate (31); the side of the extrusion part (21) abuts against the compaction plate (31); and the hammer part (22) is fixed to a side of the extrusion part (21) close to the force-bearing plate (1).

5. A deep foundation pit support structure according to claim 1, characterized in that: A movable groove (11) for the compacting plate (31) to move is provided in the force-bearing plate (1); the compacting plate (31) is connected to the movable groove (11) via a movable structure (4).

6. A deep foundation pit support structure according to claim 5, characterized in that: The movable structure (4) comprises a movable block (41), a translation slot (42) and a lifting slot (43); the movable block (41) is fixed to the side wall of the compacting plate (31); the translation slot (42) is transversely extended to the side wall of the movable slot (11); the lifting slot (43) is longitudinally extended to one end of the translation slot (42); and the movable block (41) moves along the translation slot (42) and the lifting slot (43).

7. A deep foundation pit support structure according to claim 4, characterized in that: The compacting plates (31) are respectively arranged at the four corners of the force-bearing plate (1); the oblique support rods (2) are respectively located on the outsides of two opposite compacting plates (31) on the left and right; the upper part of the oblique support rod (2) extends vertically; the extrusion part (21) and the hammer part (22) extend horizontally at the upper and lower ends of the vertical extension section of the oblique support rod (2); the lower part of the oblique support rod (2) extends obliquely and abuts against the ground.

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