A deep foundation pit supporting structure displacement monitoring device

Abstract

The application relates to a deep foundation pit supporting structure displacement monitoring device, which comprises a first monitoring box, a first guide pipe is fixedly installed on one side of the first monitoring box, an installation plate is fixedly installed at the end of the first guide pipe away from the first monitoring box, a pressure sensor is fixedly installed on the side of the installation plate close to the first monitoring box, a shaft rod is rotatably installed in the first monitoring box, a pressing rod is fixedly installed on the shaft rod, a pressing block is fixedly installed at one end of the pressing rod, an elastic mechanism is arranged between the pressing block and the pressure sensor, the shaft rod is used for driving the pressing block to extrude the pressure sensor through the elastic mechanism, a traction rope is installed at the end of the pressing rod away from the pressing block, the end of the traction rope away from the pressing rod is used for being connected with the supporting structure, the pressure sensor is electrically connected with a wireless analysis mechanism, and the wireless analysis mechanism is used for calculating the horizontal displacement of the supporting structure according to the pressure received by the pressure sensor. The application has the effect of conveniently monitoring the horizontal displacement of the foundation pit supporting structure.

Description

Technical Field

[0001] This application relates to the field of monitoring devices, and in particular to a displacement monitoring device for deep foundation pit support structures. Background Technology

[0002] As the size and depth of foundation pits continue to increase, the number of foundation pit monitoring projects is also gradually increasing. Generally, foundation pit monitoring involves various observations and analyses of changes in the soil and rock properties, displacement of the support structure, and changes in the surrounding environmental conditions.

[0003] The inner wall of the excavation pit is supported by a retaining structure. As the retaining structure supports the inner wall, the inner wall also compresses the retaining structure, causing it to move horizontally. To reduce the risk of damage due to horizontal displacement exceeding a safe distance, professional monitoring personnel regularly measure the horizontal displacement of the retaining structure at the construction site. If the horizontal displacement exceeds the safe distance, construction workers are promptly arranged to reinforce both the inner wall of the excavation pit and the retaining structure.

[0004] Deep foundation pits generally refer to those exceeding five meters in depth. The deeper the pit, the greater the pressure exerted by the pit's inner walls on the supporting structure, thus accelerating the horizontal displacement of the supporting structure. This rapid horizontal displacement necessitates frequent on-site measurements by monitoring personnel, further increasing the difficulty of monitoring the horizontal displacement of the foundation pit's supporting structure. Summary of the Invention

[0005] To facilitate the monitoring of horizontal displacement of foundation pit support structures, this application provides a displacement monitoring device for deep foundation pit support structures.

[0006] This application provides a displacement monitoring device for deep foundation pit support structures, which adopts the following technical solution:

[0007] A displacement monitoring device for deep foundation pit support structures includes a first monitoring box. A first guide tube is fixedly installed on one side of the first monitoring box, and the first guide tube is connected to the first monitoring box. An installation plate is fixedly installed at the end of the first guide tube away from the first monitoring box. A pressure sensor is fixedly installed on the side of the installation plate near the first monitoring box. A shaft is provided inside the first monitoring box. The end of the shaft is rotatably inserted into the inner wall of the first monitoring box. A pressure rod is fixedly installed on the shaft. A pressure block is fixedly installed at one end of the pressure rod. An elastic mechanism is provided between the pressure block and the pressure sensor. The rotation of the shaft is used to drive the pressure block to squeeze the pressure sensor through the elastic mechanism. A traction rope is installed at the end of the pressure rod away from the pressure block. The end of the traction rope away from the pressure rod slides through the side of the first monitoring box away from the first guide tube. The end of the traction rope away from the pressure rod is used to connect to the support structure. The pressure sensor is electrically connected to a wireless analysis mechanism. The wireless analysis mechanism is used to calculate the horizontal displacement of the support structure based on the pressure received by the pressure sensor and then send the calculation to a mobile terminal of the monitoring personnel.

[0008] By employing the above technical solution, when the support structure undergoes horizontal displacement due to compression from the inner wall of the foundation pit, the support structure pulls the pressure rod, causing the pressure rod to rotate. The pressure rod drives the pressure block to compress the pressure sensor through an elastic mechanism. Then, the wireless analysis unit calculates the horizontal displacement of the support structure based on the pressure received by the pressure sensor. Subsequently, the wireless analysis unit transmits the horizontal displacement of the support structure to the mobile terminal of the monitoring personnel, thereby reducing the need for frequent on-site inspections and facilitating the monitoring of the horizontal displacement of the foundation pit support structure.

[0009] Optionally, the elastic mechanism includes a first guide rod, a pressure plate, and a spring. The pressure plate abuts against the side of the pressure sensor away from the mounting plate. The first guide rod slides through the first guide tube. The spring is fixedly installed between the pressure plate and the first guide rod. The end of the first guide rod away from the pressure plate is used for compression by the pressure block.

[0010] By adopting the above technical solution, when the pressure rod drives the pressure block to squeeze the first guide rod, the first guide rod squeezes the spring, reducing the length of the spring and thus increasing the pressure of the pressure plate on the pressure sensor. The spring acts as a buffer, thereby reducing the possibility of the first pressure rod driving the pressure block to damage the pressure sensor.

[0011] Optionally, a second guide rod is hinged to the end of the pressure rod away from the pressure block. The second guide rod is slidably fitted with a second guide tube. The second guide tube is vertically arranged. The outer wall of the second guide tube is fixedly connected to the end of the traction rope located inside the first monitoring box. A slider is fixedly installed on the outer wall of the second guide tube. The inner wall of the first monitoring box, where the shaft is rotatably inserted, is provided with a groove for the slider to slide.

[0012] By adopting the above technical solution, when the traction rope is pulled horizontally in the support structure, the second guide tube cooperates with the slider through the groove, thereby allowing the second guide tube to move horizontally with the traction rope. During the horizontal movement of the second guide tube, the end of the pressure rod away from the pressure block rotates around the bottom end of the second guide rod, and the second guide rod also slides up and down within the second guide tube. This reduces the likelihood of the pressure rod rotating and causing the traction rope to tilt, thus improving monitoring accuracy.

[0013] Optionally, a protective tube is fixedly installed on the side of the first monitoring box away from the first guide tube. The protective tube is connected to the inside of the first monitoring box. The traction rope passes through the protective tube. A limit block is fixedly installed on the end of the traction rope away from the pressure rod. The limit block is located at the end of the protective tube away from the first monitoring box. The limit block is used to connect with the support structure. When the limit block abuts against the end of the protective tube away from the first monitoring box, the pressure rod is in a vertical state.

[0014] By adopting the above technical solution, after the limiting block is connected to the support structure, the first monitoring box is moved so that the protective tube and the limiting block abut against each other. The pressure rod naturally remains vertical under the gravity of the pressure block, which facilitates the monitoring of the horizontal displacement of the support structure.

[0015] Optionally, a connecting plate is fixedly installed on the side of the limiting block near the protective tube. The connecting plate is provided with a limiting rod, and both the side wall of the protective tube and the connecting plate are provided with limiting holes for the limiting rod to pass through in a damping manner.

[0016] By adopting the above technical solution, before installing the limiting block on the support structure, the limiting rod is inserted into the limiting hole, thereby keeping the limiting block in contact with the protective pipe and reducing the possibility of the limiting block being pulled away during installation on the support structure. After the limiting block is installed on the support structure, the limiting rod is pulled out of the limiting hole, thus facilitating the movement of the limiting block with the support structure.

[0017] Optionally, the limiting block is provided with a third guide tube, which is vertically arranged. The tube body of the third guide tube is used for fixed connection with the support structure. The limiting block is slidably arranged inside the third guide tube. The third guide tube has a sliding opening on the side near the first monitoring box for the traction rope to slide.

[0018] By adopting the above technical solution, the support structure will move vertically under the influence of gravity. By sliding the limiting block in the third guide tube, the occurrence of the traction rope tilting due to the vertical movement of the support structure is reduced, thereby improving the accuracy of monitoring the horizontal displacement of the support structure.

[0019] Optionally, a second monitoring box is fixedly installed at the bottom end of the third guide tube, and a lifting rod is fixedly installed on the bottom side of the limiting block. The lifting rod slides through the top side of the second monitoring box. A distance sensor is fixedly installed at the end of the lifting rod away from the limiting block. The distance sensor is used to detect the distance between the bottom end of the lifting rod and the inner bottom wall of the second monitoring box. The distance sensor is electrically connected to a wireless analysis mechanism. The wireless analysis mechanism is used to calculate the vertical displacement of the support structure based on the distance monitored by the distance sensor and send it to the mobile terminal of the monitoring personnel.

[0020] By adopting the above technical solution, when the support structure moves downwards in the vertical direction, it drives the third guide tube and the second monitoring box to move downwards, thereby increasing the distance detected by the distance sensor. The wireless analysis unit then calculates the vertical displacement of the support structure based on the distance detected by the distance sensor, thus facilitating the simultaneous monitoring of both the vertical and horizontal displacements of the support structure.

[0021] Optionally, the outer bottom wall of the second monitoring box gradually rises from the center to the periphery in a conical shape.

[0022] By adopting the above technical solution, the impact on the second monitoring box as it moves downward with the support structure is reduced.

[0023] Optionally, the wireless analysis mechanism includes a wireless module and a processing module. The processing module, pressure sensor, and distance sensor are all electrically connected to the processing module. The pressure sensor generates a pressure signal based on the received pressure and sends it to the processing module. The distance sensor generates a distance signal based on the distance between the bottom of the lifting rod and the bottom wall of the second monitoring box and sends it to the processing module. The processing module calculates the horizontal displacement of the support structure based on the pressure signal and the vertical displacement of the support structure based on the distance signal. The processing module also transmits the horizontal and vertical displacements of the support structure to the wireless module, which in turn transmits them to a mobile terminal.

[0024] By adopting the above technical solution, the processing module calculates the horizontal displacement of the support structure based on the pressure signal, and also calculates the vertical displacement of the support structure based on the distance signal. Then, the wireless module sends the horizontal and vertical displacements of the support structure to the mobile terminal of the monitoring personnel, thereby reducing the frequency of the monitoring personnel going to the construction site and facilitating the monitoring of the horizontal displacement of the foundation pit support structure.

[0025] Optionally, the distance from one end of the pressure rod near the pressure block to the shaft is greater than the distance from the other end of the pressure rod to the shaft.

[0026] By adopting the above technical solution, when the end of the pull rod away from the pressure block is rotated, the distance from the end of the pressure rod closer to the pressure block to the shaft is larger, thereby increasing the distance the pressure rod drives the pressure block to move. The increased movement distance of the pressure block increases the pressure applied to the pressure sensor by the pressure block through the elastic mechanism, thus improving the accuracy of monitoring the horizontal displacement of the support structure.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. When the support structure is horizontally displaced, the support structure pulls the traction rope to move together. The traction rope pulls and rotates, so that the pressure block squeezes the pressure sensor through the elastic mechanism. Then, the wireless analysis mechanism calculates the horizontal displacement of the support structure based on the pressure sensor and sends it to the mobile terminal of the monitoring personnel. This reduces the frequency of the monitoring personnel going to the construction site to detect the horizontal displacement of the support structure, and makes it easier to monitor the horizontal displacement of the foundation pit support structure.

[0029] 2. When the support structure undergoes vertical displacement, the support structure moves downward together with the third guide tube and the second monitoring box, thereby changing the distance between the bottom end of the lifting rod detected by the distance sensor and the inner bottom wall of the second monitoring box. Then, the wireless analysis unit calculates the vertical displacement of the support structure based on the distance monitored by the distance sensor and sends it to the mobile terminal of the monitoring personnel, thereby reducing the frequency of monitoring personnel going to the construction site to detect the vertical displacement of the support structure, and thus facilitating the monitoring of the vertical displacement of the foundation pit support structure. Attached Figure Description

[0030] Figure 1 This is a side view of the monitoring device of this application embodiment buried underground around the support structure;

[0031] Figure 2 This is a top view of an embodiment of this application;

[0032] Figure 3 yes Figure 2 Sectional view at AA;

[0033] Figure 4 This is a schematic diagram of the structure of the second guide tube and slider according to an embodiment of this application;

[0034] Figure 5 This is a schematic diagram of the structure of the limiting block moving away from the protective tube after the limiting rod is pulled out of the limiting hole according to an embodiment of this application;

[0035] Figure 6 This is a top view of the third guide tube and the second monitoring box according to an embodiment of this application;

[0036] Figure 7 This is a schematic diagram of an embodiment of this application.

[0037] Explanation of reference numerals in the attached drawings: 1. First monitoring box; 2. Second monitoring box; 3. First guide tube; 4. Mounting plate; 5. Pressure sensor; 6. Shaft; 7. Pressure rod; 8. Pressure block; 9. Elastic mechanism; 91. First guide rod; 92. Pressure plate; 93. Spring; 10. Second guide tube; 11. Second guide rod; 12. Slider; 13. Slide groove; 14. Traction rope; 15. Protective tube; 16. Limiting block; 17. Connecting plate; 18. Limiting rod; 19. Limiting hole; 20. Third guide tube; 21. Slide opening; 22. Lifting rod; 23. Distance sensor; 24. Wireless analysis mechanism; 241. Wireless module; 242. Processing module. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0039] This application discloses a displacement monitoring device for deep foundation pit support structures.

[0040] Reference Figure 1 , Figure 2 A displacement monitoring device for deep foundation pit support structures includes a first monitoring box 1, which is buried underground around the perimeter of the support structure. A first guide pipe 3 is fixedly installed on one side of the first monitoring box 1, and the first guide pipe 3 is located on the side of the first monitoring box 1 away from the support structure.

[0041] Reference Figure 3 An mounting plate 4 is fixedly installed at the end of the first guide tube 3 away from the first monitoring box 1. The mounting plate 4 is used to seal the end of the first guide tube 3 away from the first monitoring box 1, thereby reducing the occurrence of soil entering the first guide tube 3. The end of the first guide tube 3 near the first monitoring box 1 is connected to the interior of the first monitoring box 1.

[0042] Reference Figure 3 A pressure sensor 5 is fixedly installed on the side of the mounting plate 4 near the first monitoring box 1. A shaft 6 is installed inside the first monitoring box 1, with its ends rotatably inserted into the two opposing inner side walls of the first monitoring box 1. A pressure rod 7 is fixedly installed on the shaft 6, and a pressure block 8 is fixedly installed on one end of the pressure rod 7. Under the influence of the weight of the pressure block 8, when no external force is applied to the end of the pressure rod 7 away from the pressure block 8, the pressure block 8 drives the pressure rod 7 to rotate, and then the pressure rod 7 is vertically positioned, with the pressure block 8 located below the pressure rod 7.

[0043] Reference Figure 3An elastic mechanism 9 is provided between the pressure block 8 and the pressure sensor 5. The elastic mechanism 9 includes a first guide rod 91, a pressure plate 92, and a spring 93. The pressure plate 92 abuts against the side of the pressure sensor 5 away from the mounting plate 4. The first guide rod 91 slides through the first guide tube 3, and the spring 93 is fixedly installed between the pressure plate 92 and the first guide rod 91. When the pressure rod 7 is rotated, the pressure rod 7 drives the pressure block 8 to squeeze the first guide rod 91. Then, the first guide rod 91 squeezes the pressure sensor 5 through the spring 93 and the pressure plate 92. The spring 93 acts as a buffer, thereby reducing the possibility of the pressure block 8 damaging the pressure sensor 5.

[0044] Reference Figure 3 , Figure 4 A second guide rod 11 is hinged to the end of the pressure rod 7 away from the pressure block 8, and a second guide tube 10 is slidably sleeved on the second guide rod 11. The second guide tube 10 is vertically arranged, and a slider 12 is fixedly installed on the outer wall of the second guide tube 10. In this embodiment of the application, there are two sliders 12: one slider 12 faces the inner wall of the first monitoring box 1 where one end of the shaft rod 6 is rotatably inserted; the other slider 12 faces the inner wall of the first monitoring box 1 where the other end of the shaft rod 6 is rotatably inserted. A groove 13 is opened on the inner wall of the first monitoring box 1 for the slider 12 to slide, and the slider 12 slides horizontally inside the groove 13. A traction rope 14 is fixedly installed on the outer wall of the second guide tube 10. The end of the traction rope 14 away from the second guide tube 10 slides through the side wall of the first monitoring box 1 away from the first guide tube 3, and the end of the traction rope 14 away from the second guide tube 10 is used to connect with the support structure.

[0045] When the support structure undergoes horizontal displacement, it pulls the traction rope 14. The traction rope 14 drives the second guide tube 10 to move along the length of the slide groove 13, causing the end of the pressure rod 7 away from the pressure block 8 to rotate around the bottom end of the second guide rod 11. The second guide rod 11 slides up and down inside the second guide tube 10. By sliding up and down the second guide rod 11, the occurrence of the traction rope 14 tilting due to the rotation of the pressure rod 7 is reduced. When the pressure rod 7 rotates, it drives the pressure block 8 to press the first guide rod 91, which in turn drives the pressure plate 92 to press the pressure sensor 5 through the spring 93. The horizontal displacement of the support structure is then calculated based on the pressure received by the pressure sensor 5. The traction rope 14 keeps pulling the second guide tube 10 horizontally, which helps to improve the accuracy of monitoring the horizontal displacement of the support structure.

[0046] The distance from the end of the pressure rod 7 near the pressure block 8 to the shaft 6 is greater than the distance from the other end of the pressure rod 7 to the shaft 6. When the second guide tube 10 is moved by the traction rope 14 and the pressure rod 7 is rotated, the distance the end of the pressure rod 7 near the pressure block 8 swings is greater than the distance the end of the pressure rod 7 away from the pressure block 8, thereby increasing the pressure on the pressure sensor 5 and thus improving the accuracy of monitoring the horizontal displacement of the support structure.

[0047] Reference Figure 3 , Figure 5 A protective tube 15 is fixedly installed on the side of the first monitoring box 1 away from the first guide tube 3, and the protective tube 15 is connected to the interior of the first monitoring box 1. A traction rope 14 passes through the protective tube 15, and a limit block 16 is fixedly installed on the end of the traction rope 14 away from the pressure rod 7. The limit block 16 is located at the end of the protective tube 15 away from the first monitoring box 1. A connecting plate 17 is fixedly installed on the side of the limit block 16 near the protective tube 15, and the connecting plate 17 is provided with a limit rod 18. Limiting holes 19 are opened on the side wall of the protective tube 15 and the connecting plate 17 for the damping passage of the limit rod 18.

[0048] The limiting block 16 is placed against the end of the protective tube 15 furthest from the first monitoring box 1. Then, the limiting rod 18 is inserted into the limiting hole 19 on the protective tube 15 and the connecting plate 17, thereby temporarily fixing the limiting block 16 to the end of the protective tube 15 furthest from the first monitoring box 1. When the limiting block 16 is against the end of the protective tube 15 furthest from the first monitoring box 1, the pressure rod 7 remains vertical.

[0049] Reference Figure 3 , Figure 6 The limiting block 16 is equipped with a third guide tube 20, which is vertically arranged. The body of the third guide tube 20 is used for fixed connection with the support structure. The limiting block 16 is located inside the third guide tube 20, and the periphery of the limiting block 16 abuts against the inner wall of the third guide tube 20. The limiting block 16 slides inside the third guide tube 20. A sliding opening 21 for the traction rope 14 to slide is opened on the side of the third guide tube 20 near the first monitoring box 1.

[0050] The support structure also displaces vertically under the influence of gravity. When the support structure displaces vertically, it moves the third guide tube 20 downwards. The limiting block 16 slides inside the third guide tube 20 and does not move with it, thus reducing the likelihood of the traction rope 14 being pulled during vertical displacement and improving the accuracy of detecting the horizontal displacement of the support structure. During horizontal displacement, the support structure pulls the limiting block 16 through the third guide tube 20, and then the limiting block 16 moves the traction rope 14. This ensures that the distance the traction rope 14 pulls is equal to the distance of the horizontal displacement of the support structure, further improving the accuracy of detecting the horizontal displacement of the support structure.

[0051] Reference Figure 3 , Figure 6 The bottom end of the third guide tube 20 is fixedly installed with a second monitoring box 2. The second monitoring box 2 does not completely seal the bottom end of the third guide tube 20, so that soil can easily enter the interior of the third guide tube 20 when it descends, thereby reducing the possibility of the limit block 16 driving the traction rope 14 to descend.

[0052] Reference Figure 3 The outer bottom wall of the second monitoring box 2 gradually rises from the center to the periphery, forming a cone shape. When the support structure drives the third guide pipe 20 to descend, the third guide pipe 20 drives the second monitoring box 2 to descend together. The bottom side of the second monitoring box 2 is cone-shaped, which facilitates the second monitoring box 2 to push away the soil and descend with the third guide pipe 20.

[0053] Reference Figure 3 A lifting rod 22 is fixedly installed on the bottom side of the limiting block 16, and the lifting rod 22 is vertically arranged. The lifting rod 22 slides through the top side of the second monitoring box 2, and a distance sensor 23 is fixedly installed at the end of the lifting rod 22 away from the limiting block 16. The distance sensor 23 shines vertically downward, allowing the distance sensor 23 to detect the distance between the bottom end of the lifting rod 22 and the inner bottom wall of the second monitoring box 2.

[0054] Reference Figure 3 , Figure 7 It also includes a wireless analysis unit 24, which includes a wireless module 241 and a processing module 242. The processing module 242, pressure sensor 5, and distance sensor 23 are all electrically connected to the processing module 242. The pressure sensor 5 is used to generate a pressure signal based on the applied pressure and send it to the processing module 242. The distance sensor 23 is used to generate a distance signal based on the distance between the bottom end of the lifting rod 22 and the bottom wall of the second monitoring box 2 and send it to the processing module 242.

[0055] The processing module 242 calculates the pressure on the pressure sensor 5 based on the pressure signal. Then, based on the pressure on the pressure sensor 5, which is equal to the spring force of the spring 93, the processing module 242 calculates the compression length of the spring 93 according to the spring force calculation formula and the spring force coefficient. The compression length of the spring 93 is then equal to the horizontal displacement distance of the pressure block 8. The processing module 242 then obtains the rotation angle of the pressure rod 7 based on the distance from the pressure block 8 to the shaft 6. Using the rotation angle of the pressure rod 7 and the distance from the end of the pressure rod 7 away from the shaft 6 to the shaft 6, the horizontal movement distance of the end of the pressure rod 7 away from the shaft 6 is calculated, and thus the horizontal displacement of the support structure is calculated.

[0056] When the support structure is displaced vertically, the processing module 242 generates first distance information based on the distance from the bottom of the lifting rod 22 to the inner wall of the second monitoring box 2 detected by the distance sensor 23. After the support structure has displaced vertically, the processing module 242 generates second distance information based on the distance from the bottom of the lifting rod 22 to the inner wall of the second monitoring box 2 detected by the distance sensor 23. The vertical displacement of the support structure is calculated by the difference between the first and second distance information.

[0057] The processing module 242 then sends the horizontal and vertical displacements of the support structure to the monitoring personnel's mobile terminal. The monitoring personnel can then access the horizontal and vertical displacements of the support structure via their mobile terminal, thereby reducing the frequency of on-site inspections and facilitating the monitoring of the horizontal displacement of the foundation pit support structure.

[0058] The implementation principle of the displacement monitoring device for deep foundation pit support structure according to this application embodiment is as follows: A pit is dug on the bottom surface around the foundation pit, and then the monitoring device of this application is placed inside. Then, the limiting rod 18 is inserted into the limiting hole 19 of the connecting plate 17 and the protective pipe 15, thereby temporarily fixing the limiting block 16 to the protective pipe 15, with the limiting block 16 abutting against the end of the protective pipe 15 away from the first monitoring box 1. Then, the limiting block 16 is placed inside the third guide pipe 20, and soil is backfilled into the third guide pipe 20 to reduce the possibility of the limiting block 16 sliding downwards due to gravity. Then, the third guide pipe 20 is fixedly connected to the support structure. With the third guide pipe 20 fixedly connected to the support structure, the limiting block 16 remains connected to the protective pipe 15, thereby reducing the possibility of the third protective pipe 15 pulling the limiting block 16 when installed on the support structure. After the third protective pipe 15 is installed on the support structure, the limiting rod 18 is pulled out, and soil is backfilled, burying the monitoring device of this application underground.

[0059] When the support structure undergoes horizontal displacement, it moves together with the traction rope 14 via the third guide tube 20 and the limiting block 16. The traction rope 14 moves the second guide tube 10, causing the pressure rod 7 to rotate. The rotation of the pressure rod 7 causes the pressure block 8 to press against the second guide rod 11, which in turn compresses the pressure sensor 5 via the spring 93 and the pressure plate 92. The pressure sensor 5 generates a pressure signal based on the received pressure and sends it to the wireless analysis unit 24. The wireless analysis unit 24 calculates the horizontal displacement of the support structure based on the pressure signal and then sends the horizontal displacement of the support structure to the monitoring personnel's mobile terminal. The monitoring personnel can then learn about the horizontal displacement of the support structure through the mobile terminal, thereby reducing the frequency of on-site inspections and facilitating the monitoring of the horizontal displacement of the foundation pit support structure.

[0060] When the support structure moves vertically, the distance sensor 23 detects the distance change. The wireless analysis module calculates the vertical displacement of the support structure based on the distance change detected by the distance sensor 23. Then, the wireless analysis module sends the vertical displacement to the mobile terminal of the monitoring personnel, so as to facilitate the simultaneous monitoring of the horizontal and vertical displacements of the support structure.

[0061] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A deep foundation pit support structure displacement monitoring device, characterized in that: The system includes a first monitoring box (1), on one side of which a first guide tube (3) is fixedly installed. The first guide tube (3) is connected to the first monitoring box (1). An installation plate (4) is fixedly installed at the end of the first guide tube (3) away from the first monitoring box (1). A pressure sensor (5) is fixedly installed on the side of the installation plate (4) near the first monitoring box (1). A shaft (6) is provided inside the first monitoring box (1). The end of the shaft (6) is rotatably inserted into the inner wall of the first monitoring box (1). A pressure rod (7) is fixedly installed on the shaft (6). A pressure block (8) is fixedly installed at one end of the pressure rod (7). The pressure block (8) is connected to the pressure sensor (5). An elastic mechanism (9) is provided between the two parts. The shaft (6) rotates to drive the pressure block (8) to squeeze the pressure sensor (5) through the elastic mechanism (9). A traction rope (14) is installed at the end of the pressure rod (7) away from the pressure block (8). The end of the traction rope (14) away from the pressure rod (7) slides through the side of the first monitoring box (1) away from the first guide tube (3). The end of the traction rope (14) away from the pressure rod (7) is used to connect to the support structure. The pressure sensor (5) is electrically connected to a wireless analysis mechanism (24). The wireless analysis mechanism (24) is used to calculate the horizontal displacement of the support structure based on the pressure received by the pressure sensor (5) and then send it to the mobile terminal of the monitoring personnel. A protective tube (15) is fixedly installed on the side of the first monitoring box (1) away from the first guide tube (3). The protective tube (15) is connected to the inside of the first monitoring box (1). The traction rope (14) is passed through the protective tube (15). A limit block (16) is fixedly installed at the end of the traction rope (14) away from the pressure rod (7). The limit block (16) is located at the end of the protective tube (15) away from the first monitoring box (1). The limit block (16) is used to connect with the support structure. When the limit block (16) abuts against the end of the protective tube (15) away from the first monitoring box (1), the pressure rod (7) is in a vertical state. The limiting block (16) is provided with a third guide tube (20), the third guide tube (20) is vertically arranged, the tube body of the third guide tube (20) is used to be fixedly connected with the support structure, the limiting block (16) is slidably arranged inside the third guide tube (20), and the third guide tube (20) has a sliding opening (21) for the traction rope (14) to slide on the side near the first monitoring box (1). The bottom end of the third guide tube (20) is fixedly installed with a second monitoring box (2), and the bottom side of the limiting block (16) is fixedly installed with a lifting rod (22). The lifting rod (22) slides through the top side of the second monitoring box (2). The end of the lifting rod (22) away from the limiting block (16) is fixedly installed with a distance sensor (23). The distance sensor (23) is used to detect the distance between the bottom end of the lifting rod (22) and the inner bottom wall of the second monitoring box (2). The distance sensor (23) is electrically connected to a wireless analysis mechanism (24). The wireless analysis mechanism (24) is used to calculate the vertical displacement of the support structure based on the distance monitored by the distance sensor (23) and send it to the mobile terminal of the monitoring personnel.

2. The deep foundation pit support structure displacement monitoring device according to claim 1, characterized in that: The elastic mechanism (9) includes a first guide rod (91), a pressure plate (92) and a spring (93). The pressure plate (92) abuts against the side of the pressure sensor (5) away from the mounting plate (4). The first guide rod (91) slides through the first guide tube (3). The spring (93) is fixedly installed between the pressure plate (92) and the first guide rod (91). The end of the first guide rod (91) away from the pressure plate (92) is used for compression by the pressure block (8).

3. The deep foundation pit support structure displacement monitoring device according to claim 1, characterized in that: The pressure rod (7) is hinged to a second guide rod (11) at the end away from the pressure block (8). The second guide rod (11) is slidably fitted with a second guide tube (10). The second guide tube (10) is vertically arranged. The outer wall of the second guide tube (10) is fixedly connected to one end of the traction rope (14) located inside the first monitoring box (1). A slider (12) is fixedly installed on the outer wall of the second guide tube (10). The inner wall of the first monitoring box (1) where the shaft rod (6) is rotatably inserted is provided with a groove (13) for the slider (12) to slide.

4. The deep foundation pit support structure displacement monitoring device according to claim 1, characterized in that: The limiting block (16) is fixedly installed with a connecting plate (17) on the side near the protective tube (15). The connecting plate (17) is provided with a limiting rod (18). The side wall of the protective tube (15) and the connecting plate (17) are both provided with limiting holes (19) for the limiting rod (18) to pass through in a damping manner.

5. The deep foundation pit support structure displacement monitoring device according to claim 1, characterized in that: The outer bottom wall of the second monitoring box (2) gradually rises from the middle to the periphery in a cone shape.

6. The deep foundation pit support structure displacement monitoring device according to claim 1, characterized in that: The wireless analysis unit (24) includes a wireless module (241) and a processing module (242). The processing module (242), pressure sensor (5), and distance sensor (23) are all electrically connected to the processing module (242). The pressure sensor (5) is used to generate a pressure signal based on the pressure received and send it to the processing module (242). The distance sensor (23) is used to generate a distance signal based on the distance between the bottom end of the lifting rod (22) and the inner bottom wall of the second monitoring box (2) and send it to the processing module (242). The processing module (242) is used to calculate the horizontal displacement of the support structure based on the pressure signal. The processing module (242) is used to calculate the vertical displacement of the support structure based on the distance signal. The processing module (242) is also used to send the horizontal and vertical displacements of the support structure to the wireless module (241). The wireless module (241) is used to send the horizontal and vertical displacements of the support structure to the mobile terminal.

7. The deep foundation pit support structure displacement monitoring device according to claim 1, characterized in that: The distance from one end of the pressure rod (7) near the pressure block (8) to the shaft (6) is greater than the distance from the other end of the pressure rod (7) to the shaft (6).

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