Foundation pit supporting device with adjustable prestress

Abstract

The invention relates to the technical field of foundation pit supporting devices, in particular to a foundation pit supporting device with adjustable prestress. The foundation pit supporting device comprises two opposite supporting plates and two sets of supporting assemblies arranged between the two supporting plates and located at the front ends and the rear ends of the two supporting plates correspondingly. The supporting assembly comprises two supporting devices arranged at the upper ends and the lower ends of the supporting plates correspondingly, each supporting device comprises a supporting barrel and supporting rods arranged at the two ends of the supporting barrel and connected to the supporting barrel in a threaded mode, and the ends, away from the supporting barrels, of the supporting rods are rotationally connected to the supporting plates. The distance between the two supporting plates can be changed only by rotating the supporting rods to enable the supporting rods in threaded connection with the supporting cylinders to extend or contract along the supporting cylinders, so that the distance between the two supporting plates is adjusted, and the distance between the two supporting plates is adjusted while the distance between the two supporting plates is adjusted. And the stability of the supporting plate for supporting the side wall of the foundation pit is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of foundation pit supporting devices, in particular to a foundation pit supporting device capable of adjusting prestress. BACKGROUND

[0002] The foundation pit supporting device capable of adjusting prestress is a supporting, reinforcing and protecting measure for the side walls of a foundation pit and the surrounding environment, and aims to ensure the safety of underground structure construction and the surrounding environment of the foundation pit. The main structure of the foundation pit supporting device capable of adjusting prestress is composed of two supporting plates and a supporting rod arranged between the two supporting plates and fixedly connected to the supporting plates. The foundation pit supporting device capable of adjusting prestress is provided with a hydraulic system for adjusting the distance between the two supporting plates on the basis of the supporting plates. The specific structure of the foundation pit supporting device capable of adjusting prestress comprises two opposite supporting plates and a plurality of bidirectional hydraulic rods arranged between the two supporting plates. The distance between the two supporting plates is adjusted by starting the bidirectional hydraulic rods, and then the whole supporting device is moved into the foundation pit so that the two supporting plates abut against the side walls on both sides of the foundation pit, and the supporting is completed.

[0003] Although the bidirectional hydraulic rods are arranged in the prior art to facilitate the workers to adjust the distance between the two supporting plates, the bidirectional hydraulic rods may have problems of oil leakage, insufficient pressure and oil pollution. These problems will cause the supporting plates to lose the supporting force, and the supporting plates cannot effectively achieve the reinforcing and protecting effect when the side walls of the foundation pit collapse. Therefore, the application provides a foundation pit supporting device capable of adjusting prestress, which is used to adjust the distance between the two supporting plates and improve the stability of the supporting plates supporting the side walls of the foundation pit. SUMMARY

[0004] In view of the deficiencies in the prior art, the application aims to provide a foundation pit supporting device capable of adjusting prestress, which is used to adjust the distance between the two supporting plates and improve the stability of the supporting plates supporting the side walls of the foundation pit.

[0005] The above-mentioned purpose of the application is achieved by the following technical scheme: a foundation pit supporting device capable of adjusting prestress comprises two opposite supporting plates and two groups of supporting assemblies arranged between the two supporting plates and located at the front and rear ends of the two supporting plates. The supporting assembly comprises two supporting devices arranged at the upper and lower ends of the supporting plate. The supporting device comprises a supporting cylinder and a supporting rod arranged at the two ends of the supporting cylinder and threadedly connected to the supporting cylinder. The end of the supporting rod away from the supporting cylinder is rotationally connected to the supporting plate.

[0006] By adopting the technical scheme, when the staff needs to adjust the distance between the two supporting plates, the staff only needs to rotate the supporting rod, so that the supporting rod which is threadedly connected to the supporting barrel extends or shrinks along the supporting barrel, the distance between the two supporting plates can be changed, and the distance adjustment between the two supporting plates is completed. The distance between the two supporting plates is adjusted by the supporting rod. Since the supporting rod is threadedly connected to the supporting barrel, the service life of the supporting rod is longer than that of the bidirectional hydraulic rod. In addition, the supporting rod which is threadedly connected to the supporting barrel is not prone to deformation or damage during use, so that the purpose of improving the stability of the supporting plate supporting the side wall of the foundation pit while adjusting the distance between the two supporting plates is achieved.

[0007] Further, the connecting portion of the supporting rod and the supporting plate is provided with a connecting structure, the supporting rod is rotatably connected to the supporting plate through the connecting structure, the connecting structure comprises a connecting hole formed on the side of the supporting plate close to the supporting rod, an annular connecting groove formed on the inner wall of the connecting hole, and an annular connecting piece provided on the end of the supporting rod away from the supporting barrel, the end of the supporting rod away from the supporting barrel extends into the connecting hole, and the annular connecting piece extends into the annular connecting groove.

[0008] By adopting the above technical scheme, the annular connecting piece does not affect the rotation of the supporting rod when the supporting rod rotates, and the annular connecting piece pushes the supporting plate to move when the supporting rod extends.

[0009] Further, the supporting barrel is provided with a control device for controlling the rotation of the supporting rod.

[0010] Further, the control device comprises two control motors arranged in the supporting barrel, connecting threaded barrels fixedly arranged on the output ends of the two control motors, and limiting structures arranged on the side of the supporting plate away from the supporting barrel and used for limiting the rotation of the supporting rod, the supporting rod is threadedly connected in the connecting threaded barrel, the connecting threaded barrel is rotatably connected to the supporting barrel, the output ends of the two control motors are respectively directed to the two supporting plates, and the supporting rod is threadedly connected to the supporting barrel through the connecting threaded barrel.

[0011] Further, the limiting structure comprises a limiting threaded hole formed on the side of the supporting plate away from the supporting barrel and communicating with the connecting hole, a fixed threaded hole formed on the end face of the end of the supporting rod away from the supporting barrel and aligned with the limiting threaded hole, a limiting bolt threadedly connected to the supporting rod through the limiting threaded hole and the fixed threaded hole and penetrating the supporting plate, a limiting disc arranged on the circumferential surface of the end of the limiting bolt away from the supporting rod, and limiting screws arranged on the two sides of the limiting disc and threadedly connected to the supporting plate through the limiting disc.

[0012] Although the support rods connected with the support cylinder by threads achieve the purpose of adjusting the distance between the two support plates and improving the stability of the support plate supporting the side wall of the foundation pit, at least eight support rods need to be screwed when the staff adjusts the distance between the two support plates, which is very troublesome. The setting of the control device solves this technical problem. When the staff needs to adjust the distance between the two support plates, only the control motor output end needs to be started to rotate, the rotating control motor output end drives the connecting threaded cylinder to rotate, and the rotating connecting threaded cylinder drives the support rod to rotate. At this time, the support rod cannot rotate because it is limited by the limiting bolt, and the limiting bolt cannot move axially because it is limited by the limiting screw. In addition, the end of the support rod connected with the support plate is also limited in axial movement by the connecting structure. Therefore, the support rod cannot rotate and will be gradually extended out of the connecting threaded cylinder with the rotating connecting threaded cylinder, so that the support rod pushes the support plate to move and adjusts the distance between the two support plates.

[0013] Further, the middle part of the support cylinder is provided with an opening and closing structure.

[0014] Further, the opening and closing structure comprises a mounting port provided on the circumferential surface of the middle part of the support cylinder and penetrating through the support cylinder, and an arc-shaped closing plate provided on the upper end of the mounting port for closing the mounting port. One end of the arc-shaped closing plate is located at the upper end of the mounting port and is rotationally connected with the support cylinder.

[0015] By adopting the above technical scheme, when the staff needs to overhaul the control motor, only the arc-shaped closing plate needs to be rotated to open the mounting port for overhauling the control motor. After the overhaul is completed, only the arc-shaped closing plate needs to be rotated to block the mounting port.

[0016] Further, one end of the arc-shaped closing plate not connected with the support cylinder is provided with a plug-in structure for improving the closing stability of the arc-shaped closing plate. The plug-in structure comprises a plug-in slot provided on the bottom surface of the mounting port and a plug-in piece fixedly provided on the end surface of one end of the arc-shaped closing plate not connected with the support cylinder. The inner wall of the plug-in slot is provided with an extrusion rubber.

[0017] By adopting the above technical scheme, when the staff rotates the arc-shaped closing plate to block the mounting port, the plug-in piece is inserted into the plug-in slot and is extruded by the extrusion rubber, so that the arc-shaped closing plate blocks the mounting port more stably.

[0018] Further, the bottom surface of the control motor is provided with a mounting structure. The mounting structure comprises an arc-shaped mounting block matched with the arc of the inner bottom surface of the support cylinder and a mounting bolt penetrating through the arc-shaped mounting block and threadedly connected with the support cylinder.

[0019] By adopting the technical scheme, the control motor is installed by the mounting structure, so that the control motor is more stable inside the support cylinder and the control motor is more convenient to disassemble and assemble.

[0020] Further, the control motor is internally provided with a signal receiver for starting and stopping the control motor, and the control motor is provided with a controller, and the controller is internally provided with a signal transmitter for sending a starting and stopping signal to the signal receiver.

[0021] By adopting the technical scheme, the controller can simultaneously start and stop all control motors, so that the staff can more conveniently start and stop the control motor.

[0022] To sum up, the present application has at least one of the following beneficial technical effects:

[0023] 1. By providing the support device, when the staff needs to adjust the distance between the two support plates, only the support rod needs to be rotated, so that the support rod threaded to the support cylinder is extended or retracted along the support cylinder, so that the distance between the two support plates can be changed, thereby completing the distance adjustment between the two support plates. The distance between the two support plates is adjusted by the support rod, and because the support rod is threaded to the support cylinder, the service life of the support rod is longer than that of the double-acting hydraulic rod, and the support rod threaded to the support cylinder is not prone to deformation or damage during use, thereby achieving the purpose of improving the stability of the support plate supporting the side wall of the foundation pit while adjusting the distance between the two support plates. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of the embodiment;

[0025] Figure 2 is a sectional view along line A-A in Figure 1

[0026] Figure 3 is an enlarged view of part A in Figure 1

[0027] Figure 4 is an enlarged view of part B in Figure 2

[0028] Figure 5 is an enlarged view of part C in Figure 1

[0029] Figure 6 is a specific structure diagram of the controller.

[0030] ​​​​Fig. 1 is a supporting plate; 2 is a supporting device; 20 is a supporting cylinder; 21 is a supporting rod; 3 is a connecting structure; 30 is a connecting port; 31 is an annular connecting groove; 32 is an annular connecting piece; 4 is a control device; 40 is a control motor; 41 is a connecting threaded cylinder; 5 is a limiting structure; 50 is a limiting bolt; 51 is a limiting disc; 52 is a limiting screw; 6 is an opening and closing structure; 60 is a mounting port; 61 is an arc-shaped closing plate; 7 is a plug-in structure; 70 is a plug-in groove; 71 is a plug-in piece; 8 is a mounting structure; 80 is an arc-shaped mounting block; 81 is a mounting bolt; 9 is a controller. DETAILED DESCRIPTION

[0031] The application will be further described in detail below with reference to the accompanying drawings.

[0032] Embodiment, refer to Figure 1 , Figure 2 , Figure 3 , a pre-stress-adjustable foundation pit supporting device, comprising two opposite supporting plates 1 and two groups of supporting assemblies arranged between the two supporting plates 1 and respectively located at the front and rear ends of the two supporting plates 1, the supporting assembly comprises two supporting devices 2 arranged at the upper and lower ends of the supporting plate 1 respectively, the supporting device 2 comprises a supporting cylinder 20 and a supporting rod 21 arranged at both ends of the supporting cylinder 20 and threadedly connected to the supporting cylinder 20, and the end of the supporting rod 21 away from the supporting cylinder 20 is rotationally connected to the supporting plate 1, when the staff needs to adjust the distance between the two supporting plates 1, only needs to rotate the supporting rod 21, so that the supporting rod 21 threadedly connected to the supporting cylinder 20 extends or shrinks along the supporting cylinder 20, that is, the distance between the two supporting plates 1 can be changed, so as to complete the distance adjustment between the two supporting plates 1, and the distance between the two supporting plates 1 is adjusted by the supporting rod 21, because the supporting rod 21 is threadedly connected to the supporting cylinder 20, the service life of the supporting rod 21 is relatively longer than that of the bidirectional hydraulic rod, and the supporting rod 21 threadedly connected to the supporting cylinder 20 is not easy to deform or damage in the use process, so as to realize the purpose of improving the stability of the supporting plate 1 supporting the side wall of the foundation pit while adjusting the distance between the two supporting plates 1.

[0033] Refer to Figure 4 and Figure 5In this embodiment, the connecting structure 3 is arranged at the connecting position of the support rod 21 and the support plate 1, and the support rod 21 is rotatably connected to the support plate 1 through the connecting structure 3. The connecting structure 3 comprises a connecting hole 30 arranged on the side of the support plate 1 close to the support rod 21, an annular connecting groove 31 arranged on the inner wall of the connecting hole 30, and an annular connecting piece 32 arranged on the end of the support rod 21 away from the support cylinder 20. The end of the support rod 21 away from the support cylinder 20 extends into the connecting hole 30, and the annular connecting piece 32 extends into the annular connecting groove 31. The arrangement of the connecting structure 3 ensures that the annular connecting piece 32 does not affect the rotation of the support rod 21 when the support rod 21 rotates, and the annular connecting piece 32 pushes the support plate 1 to move when the support rod 21 extends.

[0034] Although the support rod 21 threaded to the support cylinder 20 achieves the adjustment of the distance between the two support plates 1 while enhancing the stability of the support plate 1 to the side wall of the foundation pit, at least four support devices 2 are arranged in the two support plates 1, which means that the staff needs to manually rotate at least eight support rods 21 when adjusting the distance between the two support plates 1. This process is not only complicated but also time-consuming. In order to solve this technical problem, the control device 4 for controlling the rotation of the support rod 21 is arranged inside the support cylinder 20. The control device 4 comprises two control motors 40 arranged inside the support cylinder 20, two connecting threaded cylinders 41 respectively arranged on the output ends of the control motors 40, and a limiting structure 5 arranged on the side of the support plate 1 away from the support cylinder 20 for locking the rotation of the support rod 21. The support rod 21 is threaded in the connecting threaded cylinder 41, and the connecting threaded cylinder 41 is connected to the support cylinder 20 by rotation. The output shafts of the two control motors 40 respectively point to the two support plates 1, and the support rod 21 is threaded to the support cylinder 20 through the connecting threaded cylinder 41.

[0035] The limiting structure 5 comprises a limiting threaded hole arranged on the side of the support plate 1 away from the support cylinder 20 and communicated with the connecting hole 30, a fixing threaded hole arranged on the end face of the end of the support rod 21 away from the support cylinder 20 and aligned with the limiting threaded hole, a limiting bolt 50 threaded to the support rod 21 through the limiting threaded hole and the fixing threaded hole and passing through the support plate 1, a limiting disc 51 arranged around the end of the limiting bolt 50 away from the support rod 21, and two limiting screws 52 respectively passing through the limiting disc 51 from both sides and threaded to the support plate 1. These arrangements ensure the stability of the support rod 21 during adjustment.

[0036] When the worker needs to adjust the distance between the two support plates 1, the control motor 40 is simply started to rotate the output shaft. The rotating output shaft of the control motor 40 drives the connecting threaded cylinder 41 to rotate. Since one end of the support rod 21 is locked by the limiting bolt 50 and cannot rotate, the limiting bolt 50 is axially limited by the limiting screw 52, and the end of the support rod 21 connected to the support plate 1 is also limited in axial movement by the connecting structure 3, so the support rod 21 cannot rotate with the connecting threaded cylinder 41. In this case, with the continuous rotation of the connecting threaded cylinder 41, the support rod 21 is gradually pushed out of the connecting threaded cylinder 41, thereby pushing the support plate 1 to move, easily achieving the adjustment of the distance between the two support plates 1. This process greatly simplifies the operation steps and improves the work efficiency.

[0037] In this embodiment, the support cylinder 20 is provided with an opening and closing structure 6 in the middle, which includes a mounting port 60 opened in the circumferential surface of the middle of the support cylinder 20 and penetrating through the support cylinder 20, and an arc-shaped closing plate 61 arranged at the upper end of the mounting port 60 for closing the mounting port 60. One end of the arc-shaped closing plate 61 is located at the upper end of the mounting port 60 and is rotationally connected to the support cylinder 20. Through the arrangement of the opening and closing structure 6, when the worker needs to overhaul the control motor 40, the worker only needs to rotate the arc-shaped closing plate 61 to open the mounting port 60 to overhaul the control motor 40. After the overhaul is completed, the worker only needs to rotate the arc-shaped closing plate 61 to block the mounting port 60.

[0038] In this embodiment, the end of the arc-shaped closing plate 61 not connected to the support cylinder 20 is provided with a plug-in structure 7 for improving the closing stability of the arc-shaped closing plate 61. The plug-in structure 7 includes a plug-in groove 70 opened in the bottom surface of the mounting port 60 and a plug-in piece 71 fixedly arranged on the end surface of the end of the arc-shaped closing plate 61 not connected to the support cylinder 20. The inner wall of the plug-in groove 70 is provided with an extrusion rubber. Through the arrangement of the plug-in structure 7, when the worker rotates the arc-shaped closing plate 61 to block the mounting port 60, the plug-in piece 71 is inserted into the plug-in groove 70 and is extruded by the extrusion rubber, so that the arc-shaped closing plate 61 blocks the mounting port 60 more stably.

[0039] In this embodiment, the bottom surface of the control motor 40 is provided with a mounting structure 8. The mounting structure 8 includes an arc-shaped mounting block 80 matched with the arc of the inner bottom surface of the support cylinder 20 and a mounting screw 81 threadedly connected to the support cylinder 20 through the arc-shaped mounting block 80. The control motor 40 is mounted through the mounting structure 8, so that the control motor 40 is more stable in the support cylinder 20 and the disassembly and assembly of the control motor 40 are more convenient.

[0040] Referring to Figure 6In the embodiment, the control motor 40 is internally provided with a signal receiver for starting and stopping the control motor 40, the control motor 40 is provided with a controller 9, the controller 9 is internally provided with a signal transmitter for sending a starting and stopping signal to the signal receiver, and all the control motors 40 can be simultaneously started and stopped through the controller 9, so that the workers can start and stop the control motor 40 more conveniently.

[0041] Specific implementation process: first, the controller 9 starts the control motor 40 to drive the connecting threaded cylinder 41 to rotate, and the rotating connecting threaded cylinder 41 drives the support rod 21 to rotate. At this time, the support rod 21 cannot rotate because it is limited by the limiting bolt 50, and the limiting bolt 50 cannot move axially because it is limited by the limiting screw 52. In addition, the end of the support rod 21 connected to the support plate 1 is also limited from moving axially by the connecting structure 3. This results in that the support rod 21 cannot rotate, and the non-rotating support rod 21 will be gradually extended out of the connecting threaded cylinder 41 by the rotating connecting threaded cylinder 41, so that the support rod 21 pushes the support plate 1 to move, thereby adjusting the distance between the two support plates 1. Then, the whole support device is moved into the foundation pit so that the two support plates 1 abut against the side walls on both sides of the foundation pit.

[0042] The embodiments of the specific implementation are the preferred embodiments of the application, and are not intended to limit the protection scope of the application. Therefore, any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. An adjustable prestressed foundation pit support device, characterized in that, It includes two opposing support plates (1) and two sets of support components disposed between the two support plates (1) and located at the front and rear ends of the two support plates (1) respectively. The support components include two support devices (2) disposed at the upper and lower ends of the support plates (1) respectively. The support device (2) includes a support cylinder (20) and support rods (21) disposed at both ends of the support cylinder (20) and threadedly connected to the support cylinder (20). The end of the support rod (21) away from the support cylinder (20) is rotatably connected to the support plate (1).

2. The adjustable prestressed foundation pit support device according to claim 1, characterized in that, A connecting structure (3) is provided at the connection between the support rod (21) and the support plate (1). The support rod (21) is rotatably connected to the support plate (1) through the connecting structure (3). The connecting structure (3) includes a connecting port (30) opened on the side of the support plate (1) near the support rod (21), an annular connecting groove (31) opened on the inner wall of the connecting port (30), and an annular connecting piece (32) provided on the end of the support rod (21) away from the support cylinder (20). The end of the support rod (21) away from the support cylinder (20) extends into the connecting port (30), and the annular connecting piece (32) extends into the annular connecting groove (31).

3. The adjustable prestressed foundation pit support device according to claim 2, characterized in that, The support cylinder (20) is equipped with a control device (4) for controlling the rotation of the support rod (21).

4. The adjustable prestressed foundation pit support device according to claim 3, characterized in that, The control device (4) includes two control motors (40) installed in the support cylinder (20), a connecting threaded cylinder (41) fixedly installed on the output ends of the two control motors (40), and a limiting structure (5) installed on the side of the support plate (1) away from the support cylinder (20) to limit the rotation of the support rod (21). The support rod (21) is threadedly connected in the connecting threaded cylinder (41), and the connecting threaded cylinder (41) is rotatably connected to the support cylinder (20). The output ends of the two control motors (40) are respectively facing the two support plates (1), and the support rod (21) is threadedly connected to the support cylinder (20) through the connecting threaded cylinder (41).

5. The adjustable prestressed foundation pit support device according to claim 4, characterized in that, The limiting structure (5) includes a limiting threaded hole on the side of the support plate (1) away from the support cylinder (20) and connected to the connection port (30), a fixing threaded hole on the end face of the support rod (21) away from the support cylinder (20) and aligned with the limiting threaded hole, a limiting bolt (50) that passes through the limiting threaded hole and the fixing threaded hole and is threaded to the support rod (21) through the support plate (1), a limiting disc (51) on the circumferential surface of the limiting bolt (50) away from the support rod (21), and limiting screws (52) on both sides of the limiting disc (51) and threaded to the support plate (1) through the limiting disc (51).

6. The adjustable prestressed foundation pit support device according to claim 1, characterized in that, The support cylinder (20) is provided with an opening and closing structure (6) in the middle.

7. The adjustable prestressed foundation pit support device according to claim 6, characterized in that, The opening and closing structure (6) includes an installation port (60) opened on the circumferential surface of the middle part of the support cylinder (20) and passing through the support cylinder (20), and an arc-shaped sealing plate (61) set at the upper end of the installation port (60) for closing the installation port (60). One end of the arc-shaped sealing plate (61) is located at the upper end of the installation port (60) and is rotatably connected to the support cylinder (20).

8. The adjustable prestressed foundation pit support device according to claim 7, characterized in that, The arc-shaped sealing plate (61) is provided with a plug-in structure (7) at one end not connected to the support cylinder (20) to improve the sealing stability of the arc-shaped sealing plate (61). The plug-in structure (7) includes a plug-in groove (70) opened on the bottom surface of the mounting port (60) and a plug-in piece (71) fixedly set on the end face of the arc-shaped sealing plate (61) not connected to the support cylinder (20). The inner wall of the plug-in groove (70) is provided with extrusion rubber.

9. The adjustable prestressed foundation pit support device according to claim 4, characterized in that, The bottom surface of the control motor (40) is provided with an installation structure (8), which includes an arc-shaped installation block (80) that conforms to the curvature of the inner bottom surface of the support cylinder (20) and an installation bolt (81) that passes through the arc-shaped installation block (80) and is threaded to the support cylinder (20).

10. The adjustable prestressed foundation pit support device according to claim 4, characterized in that, The control motor (40) is equipped with a signal receiver for starting and stopping the control motor (40). The control motor (40) is equipped with a controller (9). The controller (9) is equipped with a signal transmitter that sends start and stop signals to the signal receiver.

Images