Foundation pit supporting and reinforcing device and supporting method

Abstract

The invention relates to the technical field of foundation pit supporting, in particular to a foundation pit supporting and reinforcing device and a supporting method.The foundation pit supporting and reinforcing device comprises a short column and a transverse partition plate arranged on the short column and further comprises a stress plate which is rotationally arranged on the transverse partition plate and driven to deflect by rotating a hand wheel so as to be attached to foundation pit walls with different gradients, then a rectangular air bag is inflated, and the stress plate is fixed to the short column; according to the device, soil filling is not needed, meanwhile, mounting and dismounting are easy and convenient, meanwhile, if the rectangular air bag is continuously subjected to active soil pressure of the foundation pit wall, after the pressure reaches a certain value, the inclined supporting rod is deflected and released through the releasing assembly so as to assist in supporting the transverse partition plate, and the effect of filling the gap between the stress plate and the foundation pit wall can be achieved. Meanwhile, when the rectangular air bag is continuously subjected to active soil pressure of the foundation pit wall, a deflection rod can be driven to deflect so as to unfold an elastic colored ribbon, so that a worker is reminded that the device is continuously pressed, and meanwhile, the worker is warned that an inclined supporting rod possibly deflects and is released.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit support, and in particular to a foundation pit support reinforcement device and a support method. Background Art

[0002] In the foundation pit project of slope excavation, in the face of the problem of insufficient slope width due to space limitations in some sections, more sophisticated and stable support measures are often required. At this time, the short column diaphragm support system becomes an effective solution. When the system is implemented, the specially made short columns will be accurately inserted into the ground near the lower part of the slope. These short columns, as the basis of the supporting structure, need to have sufficient strength and stability. Then, the diaphragm is carefully placed between the short columns and the slope, playing a key role in retaining soil and bearing weight. In order to further enhance the overall stability, it is also necessary to fill the gap between the diaphragm and the slope, which not only helps to resist lateral pressure and evenly disperse soil pressure, but also improves the overall safety performance. However, it is worth noting that the filling process between the diaphragm and the slope is not an easy task. It requires construction workers to have a high degree of professional skills and patience to ensure the uniformity and density of the filling. This process is often time-consuming and labor-intensive. What is more difficult is that during the subsequent dismantling of the short column diaphragm support system, the slightest carelessness may cause the collapse of the previously carefully filled soil, which will not only destroy the completed engineering structure, but also pose a serious threat to the surrounding construction environment and personnel safety. It has construction hazards that cannot be ignored. For this reason, we propose a foundation pit support reinforcement device and support method. Summary of the invention

[0003] A technical problem to be solved by this application is: how to design a support structure that is easy to install and disassemble.

[0004] In order to solve the above technical problems, the embodiment of the present application provides a foundation pit support reinforcement device, including a short column and a diaphragm arranged on the short column, and also includes: The load-bearing plate is rotatably arranged on the diaphragm, and the diaphragm is provided with a deflection assembly connected to the load-bearing plate, which is used to drive the load-bearing plate to deflect relative to the diaphragm and fit the foundation pit wall; A rectangular airbag is fixedly connected to one side of the stress-bearing plate and is conductively connected to an external inflation device. The external inflation device is used to inflate the rectangular airbag to fill the gap between the stress-bearing plate and the foundation pit wall. A diagonal brace, rotatably connected to the diaphragm; The release component is arranged on the diaphragm and connected with the diagonal support rod and the rectangular airbag. When the active earth pressure of the foundation pit wall on the rectangular airbag increases to a certain value, the release component is triggered to release the diagonal support rod to actively deflect and support the diaphragm.

[0005] In some embodiments, the bottom end of the force-bearing plate is fixedly connected to a shaft 1, and the shaft 1 is rotatably connected to the diaphragm; The deflection assembly includes a second shaft fixedly connected to one side of the force-bearing plate, a first slide groove is provided on the transverse partition, a slider is slidably connected in the first slide groove, one end of the slider is also fixedly connected to the second shaft, a connecting rod is rotatably connected between the two second shafts, and sliding the slider drives the force-bearing plate to deflect; A shaft three is rotatably connected to the transverse partition, a screw rod is fixedly connected to the shaft three, and the screw rod passes through the slider. Rotating the shaft three drives the slider to move.

[0006] In some embodiments, the connecting rod is symmetrically arranged with respect to the diaphragm, and two sliders, screws, and shafts 3 are provided corresponding to the connecting rods. One end of each of the two shafts 3 passes through the diaphragm and is fixedly connected to a beveled toothed disc 1. The diaphragm is rotatably connected with a shaft 4, and both ends of the shaft 4 are fixedly connected to a beveled toothed disc 2. The two beveled toothed discs 2 are meshed with the two beveled toothed discs 1 correspondingly. A hand wheel is fixedly connected to one end of the shaft three.

[0007] In some embodiments, one end of the diagonal support rod is fixedly connected to the shaft five, the shaft five is rotatably connected to the transverse partition, and a torsion spring is sleeved on the shaft five, and the two ends of the torsion spring are respectively fixed to the shaft five and the transverse partition, and when the partition is in the retracted state, the torsion spring is in a torsion state under force; A locking piece is provided on the transverse partition for locking the shaft five.

[0008] In some embodiments, the locking member comprises a rotating disk fixedly connected to the shaft five, the rotating disk is provided with a through hole one, the transverse partition is fixedly connected with a sliding sleeve, a locking pin is slidably connected in the sliding sleeve, and one end of the locking pin is located in the through hole one to lock the shaft five; A spring 1 is sleeved on the locking pin, and two ends of the spring 1 are respectively fixed to the locking pin and the inner wall of the sliding sleeve. The locking pin is pulled to drive it to disengage from the through hole 1 to release the locking of the shaft 5.

[0009] In some embodiments, the release assembly includes a syringe fixedly connected to the diaphragm, the syringe is conductively connected to an air guide tube, the air guide tube is conductively connected to the rectangular airbag, and a piston is slidably connected in the syringe, one end of the piston is fixedly connected to a push rod, one end of the push rod slides through the syringe, and a spring 2 is sleeved on the push rod, and the two ends of the spring 2 are respectively in contact with the piston and the inner wall of the syringe; A strip plate is fixedly connected to one end of the push rod, a guide groove is opened on the strip plate, and a cylindrical protrusion is fixedly connected to one end of the locking pin, one end of which is located in the guide groove. Moving the push rod drives the cylindrical protrusion to slide along the guide groove to drive the locking pin to move and pull out.

[0010] In some embodiments, the guide groove member includes a vertical slide groove formed on a strip plate, one end of the cylindrical protrusion is located in the vertical slide groove, and the strip plate is moved to allow the cylindrical protrusion to slide along the vertical slide groove; The strip plate is provided with an oblique sliding groove which is in communication with the vertical sliding groove. Moving the strip plate drives the cylindrical protrusion to slide relative to the oblique sliding groove, thereby driving the locking pin to move.

[0011] In some embodiments, a deflection rod is provided on one side of the diaphragm, one end of the deflection rod is fixedly connected to a shaft six, the shaft six is ​​rotatably connected to the diaphragm, and a plurality of elastic ribbons are fixedly connected between the deflection rod and the diaphragm, and during the process of moving the push rod, the deflection rod is rotated to lengthen the elastic ribbon; The shaft 6 is fixedly connected with a paddle plate, one end of the strip plate is fixedly connected with an L-shaped plate, one end of the L-shaped plate is provided with a guide groove, one end of the paddle plate is rotatably connected with a shaft 7 with one end located in the guide groove, and the strip plate is moved to drive the deflection rod to deflect; A trapezoidal limit block is fixedly connected to the transverse partition to limit the deflected diagonal bracing rod; A second through hole is provided on the rotating disk, and a transverse sliding groove communicating with the inclined sliding groove is provided on the strip plate.

[0012] In some embodiments, one end of the diagonal support rod is fixedly connected to a rectangular support plate, and a plurality of spikes are installed on one side of the rectangular support plate.

[0013] A foundation pit supporting method comprises the following steps: S1. Carry out short column construction on the foundation pit slope platform, and then install the diaphragm onto the short column; S2. Turn the hand wheel to adjust the deflection angle of the load-bearing plate to fit the foundation pit wall; S3. Use external inflation equipment to inflate the rectangular airbag to fill the gap between the load-bearing plate and the foundation pit wall to complete the support of the foundation pit wall.

[0014] The present invention has at least the following beneficial effects: 1. The force-bearing plate is deflected by turning the hand wheel to fit the foundation pit wall with different inclinations, and then the rectangular airbag is inflated to fill the gap between the force-bearing plate and the foundation pit wall after expansion to replace the role of filling soil. This device does not require filling soil and is simple and convenient to install and disassemble.

[0015] 2. During the operation of this device, if the rectangular airbag is continuously subjected to the active soil pressure of the foundation pit wall, when the pressure reaches a certain value, the release assembly will be used to deflect and release the diagonal support rod to assist in supporting the diaphragm, thereby improving the support capacity of the device body.

[0016] 3. When the rectangular airbag is continuously subjected to active soil pressure from the foundation pit wall, the device will drive the deflection rod to deflect and unfold the elastic ribbon to remind the staff that the device is continuously under pressure, and at the same time warn the staff that the diagonal support rod may be deflected and released. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of the local cross-section structure; Figure 3 For the present invention Figure 2 Schematic diagram of the local cross-section structure; Figure 4 For the present invention Figure 1 Schematic diagram of the local cross-section structure; Figure 5 For the present invention Figure 4 Schematic diagram of the local cross-section structure; Figure 6 This is a structural schematic diagram of Example 2 of the present invention.

[0018] In the figure: 1-short column; 11-cross partition; 2-force plate; 3-deflection assembly; 4-rectangular airbag; 5-diagonal support rod; 6-release assembly; 31-axis 1; 32-axis 2; 33-slideway 1; 34-slider; 35-connecting rod; 36-axis 3; 37-screw; 38-bevel gear plate 1; 39-axis 4; 41-bevel gear plate 2; 42-handwheel; 43-axis 5; 44-torsion spring; 45-locking piece; 46-rotating plate; 47-through hole 1; 48-sliding sleeve; 49-lock Fixed pin; 51-spring one; 52-injection cylinder; 53-air guide tube; 54-piston; 55-push rod; 56-spring two; 57-strip plate; 58-guide groove piece; 59-cylindrical convex; 61-vertical slide groove; 62-oblique slide groove; 63-deflection rod; 64-axis six; 65-elastic ribbon; 66-push plate; 67-L-type plate; 68-guide groove; 69-trapezoidal limit block; 71-through hole two; 72-horizontal slide groove; 73-rectangular support plate; 74-spike; 75-axis seven. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figure 1-Figure 5The present invention provides a technical solution: a foundation pit support reinforcement device, comprising a short column 1 and a diaphragm 11 arranged on the short column 1, and also comprising: The load-bearing plate 2 is rotatably arranged on the diaphragm 11, and the diaphragm 11 is provided with a deflection assembly 3 connected to the load-bearing plate 2, which is used to drive the load-bearing plate 2 to deflect relative to the diaphragm 11 and fit the foundation pit wall; A rectangular airbag 4 is fixedly connected to one side of the stress-bearing plate 2 and is conductively connected to an external inflation device. The rectangular airbag 4 is inflated by the external inflation device to fill the gap between the stress-bearing plate 2 and the foundation pit wall. The diagonal brace 5 is rotatably connected to the diaphragm 11; The release component 6 is arranged on the diaphragm 11 and connected to the diagonal support rod 5 and the rectangular airbag 4. When the active earth pressure of the foundation pit wall on the rectangular airbag 4 continues to increase to a certain value, the release component 6 is triggered to release the diagonal support rod 5 to actively deflect and support the diaphragm 11; Specifically, when the device is in use, the hand wheel 42 is turned to drive the force-bearing plate 2 to deflect so as to fit the foundation pit wall with different inclinations, and then the rectangular airbag 4 is inflated so that it expands and fills the gap between the force-bearing plate 2 and the foundation pit wall to replace the role of filling soil. The device does not require filling soil, and is simple and convenient to install and disassemble. At the same time, during the operation of the device, if the rectangular airbag 4 is continuously subjected to the active soil pressure of the foundation pit wall, when the pressure reaches a certain value, the release component 6 will be used to deflect and release the diagonal support rod 5 to assist in supporting the diaphragm 11, thereby improving the support capacity of the device body. At the same time, when the rectangular airbag 4 is continuously subjected to the active soil pressure of the foundation pit wall, it will drive the deflection rod 63 to deflect to unfold the elastic ribbon 65 to remind the staff that the device is continuously under pressure, and at the same time warn the staff that the diagonal support rod 5 may be deflected and released.

[0021] The bottom end of the load-bearing plate 2 is fixedly connected with a shaft 31, and the shaft 31 is rotatably connected to the diaphragm 11 through a bearing; The deflection assembly 3 includes a second shaft 32 fixedly connected to one side of the force-bearing plate 2, a first slide groove 33 is provided on the diaphragm 11, a slider 34 is slidably connected in the first slide groove 33, one end of the slider 34 is also fixedly connected to the second shaft 32, a connecting rod 35 is rotatably connected between the two second shafts 32 through a bearing, and the sliding slider 34 drives the force-bearing plate 2 to deflect relative to the diaphragm 11 by using the connecting rod 35; A shaft 36 is rotatably connected to the diaphragm 11 via a bearing, a screw 37 is fixedly connected to the shaft 36, the screw 37 passes through the slider 34 and is threadedly connected thereto, and rotating the shaft 36 drives the screw 37 to rotate, thereby driving the slider 34 to move.

[0022] Two connecting rods 35 are symmetrically arranged relative to the diaphragm 11, and two sliders 34, screws 37, and shafts 36 corresponding to the connecting rods 35 are each provided, which are used to improve the stability of the device. One end of the two shafts 36 passes through the diaphragm 11 and is fixedly connected to the beveled toothed disc 1 38. The diaphragm 11 is rotatably connected to the shaft 4 39 through a bearing. Both ends of the shaft 4 39 are fixedly connected to the beveled toothed disc 2 41. The two beveled toothed discs 2 41 are meshed with the two beveled toothed discs 1 38 correspondingly, and the thread directions of the two screws 37 are opposite. A hand wheel 42 is fixedly connected to one end of the shaft 36; During specific work, the construction personnel arbitrarily rotate a hand wheel 42, and drive the two shafts 36 to rotate synchronously through the cooperation of the bevel gear plate 1 38 and the bevel gear plate 2 41, so as to drive the two screw rods 37 to rotate, and then drive the two sliders 34 to slide, so as to use the two connecting rods 35 to promote the deflection adjustment of the force plate 2.

[0023] One end of the diagonal brace 5 is fixedly connected to the shaft 5 43, and the shaft 5 43 is rotatably connected to the transverse partition 11 through a bearing, and a torsion spring 44 is sleeved on the shaft 5 43, and the two ends of the torsion spring 44 are respectively fixedly connected to the shaft 5 43 and the transverse partition 11. When the partition is in the retracted state, the torsion spring 44 is in a torsion state under force; A locking member 45 is provided on the transverse partition 11 for locking the shaft 5 43 to maintain the stowed state of the diagonal brace rod 5 .

[0024] The locking member 45 includes a rotating disk 46 fixedly connected to the shaft 5 43, a through hole 1 47 is formed on the rotating disk 46, a sliding sleeve 48 is fixedly connected to the transverse partition 11, a locking pin 49 is slidably connected in the sliding sleeve 48, and one end of the locking pin 49 is located in the through hole 1 47 to lock the shaft 5 43; A spring 51 is sleeved on the locking pin 49, and the two ends of the spring 51 are fixedly connected to the locking pin 49 and the inner wall of the sliding sleeve 48 respectively. Pulling the locking pin 49 drives it to disengage from the through hole 47 to release the lock of the shaft 5 43. At the same time, the spring 51 is compressed and contracted to provide it with self-restoring elastic force.

[0025] The release assembly 6 includes a syringe 52 fixedly connected to the diaphragm 11, an air guide tube 53 is conductively connected to the syringe 52, the air guide tube 53 is conductively connected to the rectangular airbag 4, and a piston 54 is slidably connected in the syringe 52, one end of the piston 54 is fixedly connected to a push rod 55, one end of the push rod 55 slides through the syringe 52, and a spring 56 is sleeved on the push rod 55, and the two ends of the spring 56 are respectively in contact with the piston 54 and the inner wall of the syringe 52. A strip plate 57 is fixedly connected to one end of the push rod 55, and a guide groove 58 is opened on the strip plate 57. One end of the locking pin 49 is fixedly connected to a cylindrical protrusion 59 with one end located in the guide groove 58. Moving the push rod 55 drives the cylindrical protrusion 59 to slide along the guide groove 58, so as to drive the locking pin 49 to move and be pulled out.

[0026] The guide groove member 58 includes a vertical slide groove 61 formed on the strip plate 57. One end of the cylindrical protrusion 59 is located in the vertical slide groove 61. The strip plate 57 is moved to allow the cylindrical protrusion 59 to slide along the vertical slide groove 61. The strip plate 57 is provided with an oblique slide groove 61 which is in communication with the vertical slide groove 61. The moving strip plate 57 drives the cylindrical protrusion 59 to slide relative to the oblique slide groove 61, thereby driving the locking pin 49 to move. During specific operation, when the active soil pressure of the foundation pit wall on the support device becomes greater and greater, the rectangular airbag 4 will be squeezed and the internal pressure will increase, thereby pushing the piston 54 to move and compressing the spring 2 56 at the same time, and pushing the strip plate 57 to move. In the distance at one end of the initial movement of the strip plate 57, the cylindrical protrusion 59 slides along the vertical slide groove 61. During this process, the locking pin 49 will not be driven to move and unlock. Only when the air pressure in the rectangular airbag 4 reaches a certain value, the inclined slide groove 61 on the strip plate 57 will push the cylindrical protrusion 59 to move, so as to drive the locking pin 49 to move and pull out of the through hole 1 47. Then the torsion spring 44 is reset to drive the diagonal support rod 5 to quickly deflect and flip out to assist in supporting the diaphragm 11.

[0027] A deflection rod 63 is provided on one side of the diaphragm 11, and one end of the deflection rod 63 is fixedly connected to a shaft 64, and the shaft 64 is rotatably connected to the diaphragm 11 through a bearing, and a plurality of elastic ribbons 65 are fixedly connected between the deflection rod 63 and the diaphragm 11. During the process of moving the push rod 55, the deflection rod 63 is rotated to stretch the elastic ribbon 65, thereby reminding the staff that the device is continuously under pressure, and at the same time, warning the staff that the diagonal support rod 5 may be deflected and released; A paddle plate 66 is fixedly connected to the shaft 64, an L-shaped plate 67 is fixedly connected to one end of the strip plate 57, a guide groove 68 is provided at one end of the L-shaped plate 67, one end of the paddle plate 66 is rotatably connected to a shaft 75 having one end located in the guide groove 68, and the shaft 75 is slidably connected to the inner wall of the guide groove 68, and the moving strip plate 57 drives the L-shaped plate 67 to move, thereby driving the paddle plate 66 to deflect, thereby driving the shaft 64 to rotate, so as to drive the deflection rod 63 to deflect; A trapezoidal stopper 69 is fixedly connected to the transverse partition 11, and is used to stop the diagonal support rod 5 after deflection, so as to improve the stability of the device; A second through hole 71 is provided on the rotating disk 46, and a transverse sliding groove 72 connected to the oblique sliding groove 61 is provided on the strip plate 57. Specifically, after the diagonal support rod 5 is deflected and flipped out, the second through hole 71 will be aligned with the locking pin 49. At this time, the locking pin 49 is reset by the spring 1 51 and driven to be inserted into the second through hole 71. At this time, the cylindrical protrusion 59 will slide along the transverse sliding groove 72, and lock the diagonal support rod 5 after the deflection and flipping out, so as to improve the stability of the device.

[0028] Example 2: Please refer to Figure 1-Figure 6 , the present invention provides a technical solution: Example 2 is optimized on the basis of Example 1; One end of the diagonal support rod 5 is fixedly connected to a rectangular support plate 73, and a plurality of spikes 74 are installed on one side of the rectangular support plate 73. When the diagonal support rod 5 is deflected and turned out, the spikes 74 are used to insert into the soil to improve the stability of the device.

[0029] A foundation pit supporting method comprises the following steps: S1, construct the short column 1 on the foundation pit slope platform, and then install the diaphragm 11 on the short column 1; S2, turning the hand wheel 42 to adjust the deflection angle of the load-bearing plate 2 to fit the foundation pit wall; S3, using external inflation equipment to inflate the rectangular airbag 4 to fill the gap between the load-bearing plate 2 and the foundation pit wall, thereby completing the support of the foundation pit wall.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A foundation pit support reinforcement device, comprising a short column (1) and a diaphragm (11) arranged on the short column (1), characterized in that: Also included are: The load-bearing plate (2) is rotatably arranged on the diaphragm (11), and the diaphragm (11) is provided with a deflection assembly (3) connected to the load-bearing plate (2) for driving the load-bearing plate (2) to deflect relative to the diaphragm (11) and to fit the foundation pit wall; A rectangular airbag (4) is fixedly connected to one side of the force-bearing plate (2) and is conductively connected to an external inflation device. The rectangular airbag (4) is inflated by the external inflation device to fill the gap between the force-bearing plate (2) and the foundation pit wall. The diagonal brace (5) is rotatably connected to the diaphragm (11); A release component (6) is arranged on the diaphragm (11) and connected to the diagonal support rod (5) and the rectangular airbag (4). When the active earth pressure of the foundation pit wall on the rectangular airbag (4) increases to a certain value, the release component (6) is triggered to release the diagonal support rod (5) to actively deflect and support the diaphragm (11).

2. The foundation pit support reinforcement device according to claim 1 is characterized in that: A shaft 1 (31) is fixedly connected to the bottom end of the force-bearing plate (2), and the shaft 1 (31) is rotatably connected to the diaphragm (11); The deflection assembly (3) comprises a second shaft (32) fixedly connected to one side of the force-bearing plate (2); a first slide groove (33) is provided on the transverse partition (11); a slider (34) is slidably connected in the first slide groove (33); one end of the slider (34) is also fixedly connected to the second shaft (32); a connecting rod (35) is rotatably connected between the two second shafts (32); sliding the slider (34) drives the force-bearing plate (2) to deflect; A third shaft (36) is rotatably connected to the transverse partition (11), a screw rod (37) is fixedly connected to the third shaft (36), and the screw rod (37) passes through the slider (34). Rotating the third shaft (36) drives the slider (34) to move.

3. The foundation pit support and reinforcement device according to claim 2 is characterized in that: The connecting rod (35) is symmetrically arranged with respect to the transverse partition (11), and two sliders (34), screws (37), and shafts (36) are provided corresponding to the connecting rod (35). One end of each of the two shafts (36) passes through the transverse partition (11) and is fixedly connected to a beveled toothed disc (38). A shaft (39) is rotatably connected to the transverse partition (11). Both ends of the shaft (39) are fixedly connected to a beveled toothed disc (41). The two beveled toothed discs (41) are meshed with the two beveled toothed discs (38) correspondingly. A hand wheel (42) is fixedly connected to one end of the shaft three (36).

4. The foundation pit support and reinforcement device according to claim 3 is characterized in that: One end of the diagonal support rod (5) is fixedly connected to a fifth shaft (43), the fifth shaft (43) is rotatably connected to the transverse partition (11), and a torsion spring (44) is sleeved on the fifth shaft (43), and the two ends of the torsion spring (44) are respectively fixed to the fifth shaft (43) and the transverse partition (11), and when the partition is in a retracted state, the torsion spring (44) is in a torsion state under force; A locking piece (45) is provided on the transverse partition (11) for locking the shaft five (43).

5. The foundation pit support and reinforcement device according to claim 4 is characterized in that: The locking member (45) comprises a rotating disk (46) fixedly connected to the fifth shaft (43), the rotating disk (46) being provided with a through hole (47), a sliding sleeve (48) fixedly connected to the transverse partition (11), a locking pin (49) slidably connected in the sliding sleeve (48), one end of the locking pin (49) being located in the through hole (47) to lock the fifth shaft (43); A spring (51) is sleeved on the locking pin (49), and two ends of the spring (51) are respectively fixed to the locking pin (49) and the inner wall of the sliding sleeve (48). The locking pin (49) is pulled to disengage from the through hole (47), thereby releasing the lock of the shaft (43).

6. The foundation pit support reinforcement device according to claim 5, characterized in that: The release assembly (6) comprises a syringe (52) fixedly connected to the diaphragm (11), an air guide tube (53) being conductively connected to the syringe (52), the air guide tube (53) being conductively connected to the rectangular air bag (4), a piston (54) being slidably connected inside the syringe (52), one end of the piston (54) being fixedly connected to a push rod (55), one end of the push rod (55) slidingly passing through the syringe (52), and a second spring (56) being sleeved on the push rod (55), the two ends of the second spring (56) respectively contacting and abutting against the piston (54) and the inner wall of the syringe (52); A strip plate (57) is fixedly connected to one end of the push rod (55), a guide groove (58) is provided on the strip plate (57), and one end of the locking pin (49) is fixedly connected to a cylindrical protrusion (59) whose end is located in the guide groove (58). Moving the push rod (55) drives the cylindrical protrusion (59) to slide along the guide groove (58), thereby driving the locking pin (49) to move and be pulled out.

7. The foundation pit support and reinforcement device according to claim 6, characterized in that: The guide groove member (58) comprises a vertical slide groove (61) formed on the strip plate (57), one end of the cylindrical protrusion (59) is located in the vertical slide groove (61), and the strip plate (57) is moved to allow the cylindrical protrusion (59) to slide along the vertical slide groove (61); The strip plate (57) is provided with an oblique slide groove (61) which is in communication with the vertical slide groove (61). Moving the strip plate (57) drives the cylindrical protrusion (59) to slide relative to the oblique slide groove (61), thereby driving the locking pin (49) to move.

8. The foundation pit support and reinforcement device according to claim 7, characterized in that: A deflection rod (63) is provided on one side of the transverse diaphragm (11), one end of the deflection rod (63) is fixedly connected to a sixth shaft (64), the sixth shaft (64) is rotatably connected to the transverse diaphragm (11), and a plurality of elastic ribbons (65) are fixedly connected between the deflection rod (63) and the transverse diaphragm (11), and during the process of moving the push rod (55), the deflection rod (63) is rotated to lengthen the elastic ribbons (65); The shaft six (64) is fixedly connected with a shift plate (66), one end of the strip plate (57) is fixedly connected with an L-shaped plate (67), one end of the L-shaped plate (67) is provided with a guide groove (68), one end of the shift plate (66) is rotatably connected with a shaft seven (75) having one end located in the guide groove (68), and the strip plate (57) is moved to drive the deflection rod (63) to deflect; A trapezoidal stopper (69) is fixedly connected to the transverse partition (11) and is used to stop the diagonal brace (5) after deflection; A second through hole (71) is provided on the rotating disk (46), and a transverse sliding groove (72) communicating with the inclined sliding groove (61) is provided on the strip plate (57).

9. The foundation pit support and reinforcement device according to claim 8, characterized in that: One end of the diagonal support rod (5) is fixedly connected to a rectangular support plate (73), and one side of the rectangular support plate (73) is provided with a plurality of spikes (74).

10. A foundation pit supporting method, using the foundation pit supporting processing device according to claim 9, characterized in that: The following steps are involved: S1, constructing a short column (1) on the foundation pit slope platform, and then installing a diaphragm (11) on the short column (1); S2, turning the hand wheel (42) to adjust the deflection angle of the load-bearing plate (2) to fit the foundation pit wall; S3, using external inflation equipment to inflate the rectangular airbag (4) to fill the gap between the load-bearing plate (2) and the foundation pit wall, thereby completing the support of the foundation pit wall.

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