Construction site foundation pit displacement monitoring device

Abstract

The utility model discloses a construction site foundation pit displacement monitoring device, which relates to the technical field of foundation pit displacement monitoring and comprises a cross-shaped fixing plate, and a foundation pit bottom monitoring component is fixedly mounted in the middle of the lower end of the cross-shaped fixing plate. According to the construction site foundation pit displacement monitoring device, the displacement of the bottom of the foundation pit can be monitored in real time through the foundation pit bottom monitoring assembly according to the displacement of the conical fixing block, high-precision displacement measurement can be achieved, and the monitoring accuracy is improved. The displacement of the outer wall of the foundation pit can be monitored in real time through the foundation pit side wall monitoring assembly according to the displacement of three contact rollers, the foundation pit side wall monitoring device can flexibly adapt to foundation pits of different sizes and shapes, and three second displacement sensors can directly measure the displacement change of the side wall of the foundation pit. The adjusting plate can be adjusted according to the size of the inner wall of the foundation pit, so that the sensor can be always kept at the optimal measurement position, and the monitoring accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit displacement monitoring, in particular to a construction site foundation pit displacement monitoring device. Background Art

[0002] With the development of urban construction, major cities around the world have developed and utilized underground space for various purposes, such as multi-story basements in high-rise buildings, subways, underground shopping malls, and a variety of underground civil and industrial facilities. On the one hand, the increase in plan size and excavation depth has led to many new problems that are difficult to address based on existing theories and experience. On the other hand, as the density of various types of buildings in cities increases, the adjacent environment, underground pipelines, and surface transportation have placed stricter restrictions on foundation pit excavation and the resulting displacement and adverse effects after construction. Therefore, effective foundation pit monitoring, especially monitoring of deep foundation pits during construction, is extremely important.

[0003] Chinese patent document CN218622347U discloses a construction site foundation pit displacement monitoring device. A telescopic connecting rod is fixedly connected to the center of the upper surface of a lower fixed plate. An indicator ball is fixedly connected to the end of the telescopic connecting rod away from the lower fixed plate. The upper indicator box is an acrylic box. A cross-fixing plate is fixedly connected to the upper surface of the upper indicator box. Both cross-fixing plates have second ground nail holes defined at their ends away from the upper indicator box. By configuring the lower fixed plate, upper indicator box, first ground nail holes, telescopic connecting rod, indicator ball, cross-fixing plate, and second ground nail holes, the device can monitor the full range of foundation pit displacement, improving monitoring accuracy.

[0004] The existing technology has the following problems:

[0005] The above-mentioned device estimates the displacement distance of the foundation pit by measuring the change in the position of the indicator ball relative to the indicator box. This design relies on ground-based displacement monitoring and cannot directly monitor the foundation pit bottom. This leads to low accuracy when the foundation pit bottom sinks significantly or undergoes complex displacement. Secondly, the above-mentioned device uses an infrared transmitter to monitor the change in the position of the indicator ball relative to the concentric indicator rings. However, infrared transmitters are easily affected by obstructions on the foundation pit sidewalls, making accurate monitoring inaccurate and of limited practicality. Utility Model Content

[0006] The utility model provides a construction site foundation pit displacement monitoring device to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A construction site foundation pit displacement monitoring device comprises a cross fixing plate, a foundation pit bottom monitoring assembly is fixedly mounted on the middle portion of the lower end of the cross fixing plate, and a foundation pit sidewall monitoring assembly is fixedly mounted on the bottom of the foundation pit bottom monitoring assembly;

[0009] The left and right sides of the movable frame are fixedly provided with an L-shaped movable plate, and the rear end of the movable plate is fixedly provided with an L-shaped movable plate. The right front end of the movable plate is rotatably connected to a rotating rod passing through the right part of the movable plate, the left outer wall of the rotating rod is fixedly sleeved with a gear second, the outer surface of the gear second is meshed with the outer surface of the gear first, and the right bottom end of the movable plate is slidably connected to a rack, and the outer surface of the gear third is meshed with the upper end of the rack, and the rear end of the rack is fixedly provided with a bottom monitoring mechanism;

[0010] The foundation pit side wall monitoring assembly includes two circular plates and a moving ring, and a cylindrical cylinder is fixedly installed on the opposite sides of the two circular plates. The upper end of the circular plate at the top is fixedly installed with the middle part of the lower end of the installation box, and the left position of the rear part of the two circular plates is movably connected with a spiral moving mechanism. The rear part of the moving ring is threadedly connected to the outer wall of the spiral moving mechanism. Three limiting sleeves arranged in a ring form are fixedly installed on the outer wall of the circular plate at the top, and the inner walls of the three limiting sleeves are slidably connected with an adjustment plate. The outer wall of the moving ring is rotatably connected with three rotating rods arranged in a ring form, and the three rotating rods are rotatably connected to the lower ends of the three adjusting plates at one end away from the moving ring, and the side wall monitoring mechanism is fixedly installed at one end of the three adjusting plates away from the axis of the cylindrical cylinder.

[0011] Preferably, the bottom monitoring mechanism includes a protective box, a displacement sensor is fixedly installed on the rear part of the inner wall of the protective box, a monitoring rod that passes through the front part of the protective box is slidably connected to the middle part of the front side of the protective box, and the front end of the monitoring rod is fixedly installed on the rear end of the rack.

[0012] Preferably, the moving mechanism includes an electric push rod, the outer wall of the electric push rod is fixedly installed on the upper right side of the installation box, the output end of the electric push rod is fixedly connected to the right position of the rear front side of the moving plate, the upper left end of the installation box is slidingly connected to a limiting rod, and the rear end of the limiting rod is fixedly connected to the left position of the rear front side of the moving plate.

[0013] Preferably, through holes for matching steel ropes are provided on the opposite sides of the two circular plates and in the middle of the lower end of the installation box.

[0014] Preferably, the inner wall of the movable ring is slidably connected to the outer wall of the cylindrical barrel.

[0015] Preferably, the side wall monitoring mechanism includes three displacement sensors 2, and the ends of the three adjustment plates away from the axis of the cylindrical cylinder are rotatably connected to contact rollers, and the lower ends of the three displacement sensors 2 are fixedly installed to the ends of the upper ends of the three adjustment plates away from the axis of the cylindrical cylinder.

[0016] Preferably, a signal controller is fixedly installed on the middle part of the upper end of the cross fixing plate, and the output ends of the displacement sensor 1 and the three displacement sensors 2 are communicatively connected to the input end of the signal controller.

[0017] Due to the adoption of the above technical solution, the present invention has achieved the following technical advancements compared to the prior art:

[0018] 1. The utility model provides a construction site foundation pit displacement monitoring device, which can monitor the displacement of the bottom of the foundation pit in real time according to the displacement of the conical fixed block through the coordination among the installation box, rotating shaft, rope drum, steel rope, conical fixed block, gear 1, moving mechanism, moving plate, gear 2, gear 3, rack, monitoring rod, protective box and displacement sensor 1. The conical fixed block can drive the rotating shaft to rotate through the steel rope, and gear 2 drives the rotating rod to rotate by meshing with gear 1. Gear 3 rotates accordingly and drives the rack to move. Displacement sensor 1 can monitor the displacement of the rack and monitoring rod in real time, and can directly understand the situation at the bottom of the foundation pit. The above combination of mechanical transmission and displacement sensor can achieve high-precision displacement measurement and improve the accuracy of monitoring.

[0019] 2. The present invention provides a construction site foundation pit displacement monitoring device. Through the coordination of a circular plate, a cylindrical tube, a spiral movement mechanism, a movable ring, a limit sleeve, an adjustment plate, a rotating rod, and a sidewall monitoring mechanism, the device can monitor the displacement of the outer wall of the foundation pit in real time based on the displacement of three contact rollers. When faced with foundation pits of varying diameters, the spiral movement mechanism drives the movable ring up and down, causing one end of the three rotating rods to rotate around the movable ring while the other end pushes or pulls the three adjustment plates to extend or retract into the corresponding limit sleeves. This allows the monitoring system to flexibly adapt to foundation pits of varying sizes and shapes. The three displacement sensors can directly measure displacement changes in the foundation pit sidewalls. Furthermore, because the adjustment plates can be adjusted according to the size of the inner pit wall, the sensors can always remain in the optimal measurement position, thereby improving monitoring accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall front structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the overall structure of the utility model when viewed from above;

[0022] Figure 3 This is a schematic diagram of the overall cross-sectional structure of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the foundation pit bottom monitoring component of the utility model (I);

[0024] Figure 5 This is a schematic diagram of the structure of the foundation pit bottom monitoring component of the utility model (II);

[0025] Figure 6 This is a schematic structural diagram of the foundation pit side wall monitoring component of the present utility model.

[0026] In the figure: 1. Cross fixing plate; 2. Foundation pit bottom monitoring assembly; 3. Foundation pit side wall monitoring assembly; 21. Mounting box; 22. Rotating shaft; 23. Rope reel; 24. Steel rope; 25. Conical fixing block; 26. Gear 1; 27. Moving mechanism; 28. Moving plate; 29. ​​Gear 2; 210. Gear 3; 211. Rack; 212. Monitoring rod; 213. Protective box; 214. Displacement sensor 1; 271. Electric push rod; 272. Limit rod; 273. Moving plate; 31. Circular plate; 32. Cylindrical tube; 33. Spiral moving mechanism; 34. Moving ring; 35. Limit sleeve; 36. Adjustment plate; 37. Rotating rod; 38. Side wall monitoring mechanism; 381. Contact roller; 382. Displacement sensor 2. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0028] like Figures 1-6 As shown, a construction site foundation pit displacement monitoring device includes a cross fixing plate 1, a foundation pit bottom monitoring component 2 is fixedly installed at the middle of the lower end of the cross fixing plate 1, and a foundation pit side wall monitoring component 3 is fixedly installed at the bottom of the foundation pit bottom monitoring component 2;

[0029] The foundation pit bottom monitoring assembly 2 includes a mounting box 21. The left and right parts of the inner wall of the mounting box 21 are rotatably connected to a rotating shaft 22 that passes through the left and right parts of the mounting box 21. A rope drum 23 is fixedly sleeved in the middle of the outer wall of the rotating shaft 22. A steel rope 24 is wound around the middle of the outer wall of the rope drum 23. A conical fixing block 25 is fixedly installed at one end of the steel rope 24 away from the rope drum 23. A gear 26 is fixedly sleeved on the right part of the outer wall of the rotating shaft 22. A moving mechanism 27 is fixedly installed on the left and right parts of the upper end of the mounting box 21. The rear of the moving mechanism 27 An L-shaped moving plate 28 is fixedly installed on the bottom, and the front right side of the moving plate 28 is rotatably connected to a rotating rod that passes through the right side of the moving plate 28. A gear 29 is fixedly sleeved on the left part of the outer wall of the rotating rod. The outer surface of the gear 29 is meshed with the outer surface of the gear 1 26. A gear 3 210 is fixedly sleeved on the right part of the outer wall of the rotating rod. A rack 211 is slidably connected to the bottom right side of the moving plate 28. The outer surface of the gear 3 210 is meshed with the upper end of the rack 211. The rear end of the rack 211 is fixedly installed with a bottom monitoring mechanism;

[0030] The foundation pit side wall monitoring assembly 3 includes two circular plates 31 and a moving ring 34. A cylindrical tube 32 is fixedly installed on the opposite sides of the two circular plates 31. The upper end of the top circular plate 31 is fixedly installed with the middle part of the lower end of the installation box 21. The left position of the rear part of the two circular plates 31 is movably connected with a spiral moving mechanism 33. The rear part of the moving ring 34 is threadedly connected to the outer wall of the spiral moving mechanism 33. Three limiting sleeves 35 arranged in a ring form are fixedly installed on the outer wall of the top circular plate 31. The inner walls of the three limiting sleeves 35 are slidably connected with an adjustment plate 36. The outer wall of the moving ring 34 is rotatably connected with three rotating rods 37 arranged in a ring form. The three rotating rods 37 are rotatably connected to the lower ends of the three adjustment plates 36 away from the moving ring 34. The side wall monitoring mechanism 38 is fixedly installed on the end of the three adjustment plates 36 away from the axis of the cylindrical tube 32.

[0031] The pit bottom monitoring assembly 2 monitors the displacement of the pit bottom in real time based on the displacement of the conical fixed block 25. The conical fixed block 25 drives the rotating shaft 22 via a steel rope 24. Gear 2 29 meshes with gear 1 26, driving the rotating rod. Gear 3 210 rotates accordingly, driving the rack 211. Displacement sensor 1 214 monitors the displacement of rack 211 and monitoring rod 212 in real time, providing direct insight into the pit bottom's conditions. The combination of mechanical transmission and displacement sensors enables high-precision displacement measurement, improving monitoring accuracy. The pit sidewall monitoring assembly 3 monitors the displacement of the pit's outer wall in real time based on the displacement of the three contact rollers 381. When dealing with pits of varying diameters, the spiral movement mechanism 33 drives the movable ring 34 up and down, causing one end of the three rotating rods 37 to rotate around the movable ring 34 while the other end pushes or pulls the three adjustment plates 36 to extend or retract into their corresponding limit sleeves 35. This allows the monitoring system to flexibly adapt to pits of varying sizes and shapes. The three displacement sensors 382 can directly measure changes in the displacement of the pit's sidewalls. Because the adjustment plates 36 can be adjusted based on the size of the pit's inner wall, the sensors can always remain in the optimal measurement position, improving monitoring accuracy.

[0032] like Figure 4 As shown, the bottom monitoring mechanism includes a protective box 213, a displacement sensor 214 is fixedly installed on the rear part of the inner wall of the protective box 213, a monitoring rod 212 that passes through the front part of the protective box 213 is slidably connected to the middle part of the front side of the protective box 213, and the front end of the monitoring rod 212 is fixedly installed on the rear end of the rack 211.

[0033] The displacement sensor 1 214 can monitor the displacement of the rack 211 and the monitoring rod 212 in real time.

[0034] like Figure 4 As shown, the moving mechanism 27 includes an electric push rod 271, the outer wall of the electric push rod 271 is fixedly installed on the upper right side of the installation box 21, the output end of the electric push rod 271 is fixedly connected to the right position of the rear front side of the moving plate 28, and the upper left end of the installation box 21 is slidingly connected to the limiting rod 272, and the rear end of the limiting rod 272 is fixedly connected to the left position of the rear front side of the moving plate 28.

[0035] The output end of the electric push rod 271 can drive the movable plate 28 to move. When the rope needs to be released, the movable plate 28 can be moved away to avoid affecting the data of the displacement sensor 214. Among them, the limit rod 272 has a limiting effect on the movement of the movable plate 28.

[0036] like Figure 2 and Figure 3 As shown, through holes for matching steel ropes 24 are provided on the opposite sides of the two circular plates 31 and the middle of the lower end of the installation box 21 .

[0037] It is convenient to retract and release the steel rope 24.

[0038] like Figure 1 As shown, the inner wall of the moving ring 34 is slidably connected to the outer wall of the cylindrical barrel 32.

[0039] The spiral moving mechanism 33 is mainly composed of a motor and a screw. The output end of the motor drives the screw to rotate. The moving ring 34 moves by being threadedly connected to the screw. The cylindrical tube 32 has a limiting effect on the movement of the moving ring 34.

[0040] like Figure 3 and Figure 6 As shown, the side wall monitoring mechanism 38 includes three displacement sensors 2 382, ​​and the ends of the three adjustment plates 36 away from the axis of the cylindrical tube 32 are rotatably connected to the contact roller 381, and the lower ends of the three displacement sensors 2 382 are fixedly installed to the ends of the upper ends of the three adjustment plates 36 away from the axis of the cylindrical tube 32.

[0041] Displacement sensor 2 382 can monitor the displacement of the inner wall of the foundation pit in real time.

[0042] like Figure 1 As shown, a signal controller is fixedly installed at the middle of the upper end of the cross fixing plate 1, and the output ends of the displacement sensor 1 214 and the three displacement sensors 2 382 are communicatively connected to the input end of the signal controller.

[0043] Displacement sensor 1 214 and displacement sensor 2 382 can transmit the received displacement signals to the signal controller, which processes the signals. The processed signals are then output to a display device or control system through an output port of the signal controller for display or control.

[0044] The working principle of the present utility model is as follows: the device as a whole is fixed to the top of the foundation pit through the cross fixing plate 1, the rotating shaft 22 is rotated, and the rotating shaft 22 drives the rope reel 23 to release the steel rope 24 at a uniform speed, ensuring that the conical fixing block 25 can be firmly inserted into the bottom of the foundation pit. At this time, the steel rope 24 is in a straight state, and the rack 211 is pushed back. The rack 211 moves backward and contacts the front side of the protective box 213, so that the monitoring rod 212 reaches the optimal position, and the moving mechanism 27 is started, which drives the moving plate 28 to move forward as a whole, so that the gear 2 29 is just engaged with the gear 1 26. Then the spiral moving mechanism 33 is started, which drives the moving ring 34 to slide on the outer wall of the cylindrical tube 32. The three rotating rods 37 drive the three adjusting plates 36 to extend or retract the limit sleeves 35, so that the three adjusting plates 36 can be adjusted according to the size of the inner wall of the foundation pit. Therefore, the displacement sensor 2 382 can always be kept in the optimal measurement position, thereby improving the accuracy of monitoring.

[0045] When the pit bottom shifts, conical fixed block 25 sinks, which, via steel rope 24, drives shaft 22 to rotate. Gear 2 29, meshing with gear 1 26, rotates the rotating rod. Gear 3 210 then rotates, driving rack 211. Displacement sensor 1 214 monitors the displacement of rack 211 and monitoring rod 212 in real time, providing direct insight into the pit bottom's conditions. This structure, through the combination of mechanical transmission and displacement sensors, enables high-precision displacement measurement, improving monitoring accuracy.

[0046] The displacement of the side wall of the foundation pit is directly monitored by three displacement sensors 2382, which is not affected by obstacles on the pit wall and is highly practical.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A construction site foundation pit displacement monitoring device, comprising a cross fixing plate (1), characterized in that: A foundation pit bottom monitoring component (2) is fixedly mounted on the middle portion of the lower end of the cross fixing plate (1), and a foundation pit sidewall monitoring component (3) is fixedly mounted on the bottom of the foundation pit bottom monitoring component (2); The foundation pit bottom monitoring assembly (2) includes a mounting box (21), the left and right parts of the inner wall of the mounting box (21) are rotatably connected to a rotating shaft (22) that penetrates the left and right parts of the mounting box (21), the middle part of the outer wall of the rotating shaft (22) is fixedly sleeved with a rope reel (23), the middle part of the outer wall of the rope reel (23) is wound with a steel rope (24), one end of the steel rope (24) away from the rope reel (23) is fixedly mounted with a conical fixing block (25), the right part of the outer wall of the rotating shaft (22) is fixedly sleeved with a gear 1 (26), and the upper left and right parts of the mounting box (21) are fixedly mounted with a moving mechanism (27), the moving mechanism An L-shaped moving plate (28) is fixedly installed at the rear of (27), and the front right side of the moving plate (28) is rotatably connected to a rotating rod that passes through the right side of the moving plate (28), and the left side of the outer wall of the rotating rod is fixedly sleeved with a gear 2 (29), and the outer surface of the gear 2 (29) is meshed with the outer surface of the gear 1 (26), and the right side of the outer wall of the rotating rod is fixedly sleeved with a gear 3 (210), and the bottom right side of the moving plate (28) is slidably connected to a rack (211), and the outer surface of the gear 3 (210) is meshed with the upper end of the rack (211), and the rear end of the rack (211) is fixedly installed with a bottom monitoring mechanism; The foundation pit side wall monitoring assembly (3) includes two circular plates (31) and a moving ring (34). A cylindrical cylinder (32) is fixedly installed on opposite sides of the two circular plates (31). The upper end of the circular plate (31) located at the top is fixedly installed with the middle part of the lower end of the installation box (21). The left part of the rear part of the two circular plates (31) is movably connected with a spiral moving mechanism (33). The rear part of the moving ring (34) is threadedly connected to the outer wall of the spiral moving mechanism (33). The circular plate (31) located at the top The outer wall of the movable ring (34) is fixedly mounted with three limiting sleeves (35) arranged in a ring form, and the inner walls of the three limiting sleeves (35) are slidably connected to the adjustment plates (36). The outer wall of the movable ring (34) is rotatably connected to three rotating rods (37) arranged in a ring form, and one end of the three rotating rods (37) away from the movable ring (34) is rotatably connected to the lower ends of the three adjustment plates (36). The end of the three adjustment plates (36) away from the axis of the cylindrical tube (32) is fixedly mounted with a side wall monitoring mechanism (38).

2. A construction site foundation pit displacement monitoring device according to claim 1, characterized in that: The bottom monitoring mechanism comprises a protective box (213), a displacement sensor 1 (214) is fixedly mounted on the rear portion of the inner wall of the protective box (213), a monitoring rod (212) penetrating the front portion of the protective box (213) is slidably connected to the middle portion of the front side of the protective box (213), and the front end of the monitoring rod (212) is fixedly mounted to the rear end of the rack (211).

3. The construction site foundation pit displacement monitoring device according to claim 1, characterized in that: The moving mechanism (27) includes an electric push rod (271), the outer wall of the electric push rod (271) is fixedly mounted on the upper right side of the mounting box (21), the output end of the electric push rod (271) is fixedly connected to the right position of the front side of the rear portion of the moving plate (28), the upper left portion of the mounting box (21) is slidably connected to a limiting rod (272), and the rear end of the limiting rod (272) is fixedly connected to the left position of the front side of the rear portion of the moving plate (28).

4. The construction site foundation pit displacement monitoring device according to claim 1, characterized in that: Through holes for matching steel ropes (24) are provided on the opposite sides of the two circular plates (31) and in the middle of the lower end of the installation box (21).

5. The construction site foundation pit displacement monitoring device according to claim 1, characterized in that: The inner wall of the movable ring (34) is slidably connected to the outer wall of the cylindrical barrel (32).

6. The construction site foundation pit displacement monitoring device according to claim 1, characterized in that: The side wall monitoring mechanism (38) includes three displacement sensors (382), and one end of each of the three adjustment plates (36) away from the axis of the cylindrical tube (32) is rotatably connected to a contact roller (381), and the lower ends of the three displacement sensors (382) and the upper ends of the three adjustment plates (36) away from the axis of the cylindrical tube (32) are fixedly installed.

7. The construction site foundation pit displacement monitoring device according to claim 2, characterized in that: A signal controller is fixedly mounted on the middle portion of the upper end of the cross fixing plate (1), and the output ends of the displacement sensor 1 (214) and the three displacement sensors 2 (382) are communicatively connected to the input end of the signal controller.

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