A foundation pit monitoring device

Abstract

This application relates to a foundation pit monitoring device, belonging to the field of foundation pit monitoring equipment. It includes a support component, monitoring equipment, adjusting components, electrical connectors, an extension component, a measuring rod, and a settlement probe. The monitoring equipment is vertically fixed to the top of the support component, and a threaded socket is fixed to the outer wall of the monitoring equipment. The electrical connector includes a cable, with a threaded sleeve electrically connected and fixed to the top of the cable, and the threaded sleeve is threadedly assembled into the threaded socket of the monitoring equipment. An extension component is electrically assembled to the bottom of the cable, the extension component including a helical tube and a helical tube. The top of the helical tube is electrically connected to the bottom of the cable, and a helical tube is assembled to the external thread of the helical tube. A measuring rod is vertically assembled to the bottom of the helical tube. This application can dynamically adjust the monitoring depth according to the foundation pit excavation progress, effectively eliminating monitoring blind spots for deep soil and rock deformation and settlement data, and avoiding the risk of support structure instability due to missed detection of deep hidden dangers.

Description

Technical Field

[0001] This application relates to the technical field of foundation pit monitoring equipment, and in particular to a foundation pit monitoring device. Background Technology

[0002] In the field of foundation pit engineering and underground engineering construction, foundation pit monitoring is the lifeline for ensuring construction safety and the stability of the surrounding environment. Its core value lies in achieving early warning and precise control of construction risks through dynamic tracking of the soil and rock properties of the foundation pit, displacement of the support structure, and changes in the surrounding environment. Specifically, the monitoring process requires the use of devices such as settlement gauges, displacement gauges, and strain gauges to collect key data in real time, such as the deformation of the foundation pit walls, the settlement of the foundation base, and the stress of the support structure. After analysis, the data is fed back to the design and construction teams to predict the deformation trends and changes in stability that may be caused by subsequent construction, thereby determining the degree of impact of construction on surrounding buildings, underground pipelines, and roads, and guiding the optimization and adjustment of construction plans.

[0003] As foundation pit engineering develops towards deeper, larger, and more complex directions, the performance shortcomings of traditional foundation pit monitoring devices are becoming increasingly prominent, making it difficult to meet the precise monitoring needs under complex construction scenarios. Traditional foundation pit monitoring devices have limited monitoring depth, and most foundation pit monitoring devices are integrated fixed structures, such as benchmark sensors for settlement monitoring and wall-mounted detectors for deformation monitoring, all of which need to be installed in one go at the beginning of foundation pit excavation.

[0004] Regarding the aforementioned technologies, the inventors discovered that the aforementioned foundation pit monitoring device lacks a standardized modular connection structure. When the excavation depth of the foundation pit exceeds the preset range of the detection equipment, it is impossible to extend the monitoring journey through secondary splicing. If it is forcibly disassembled and reassembled, it will not only interrupt the continuity of monitoring data, but may also cause subsequent data to be unable to connect with previous data due to installation errors. For ultra-deep foundation pits or foundation pits excavated in stages, this limitation of one-time installation will lead to the loss of data on deep soil deformation and settlement, forming a monitoring blind spot. The failure to detect deep hidden dangers may cause the support structure to become unstable, threatening the overall safety of the foundation pit. Utility Model Content

[0005] To overcome the lack of standardized modular connection structure in existing foundation pit monitoring devices, when the excavation depth of the foundation pit exceeds the preset range of the detection equipment, it is impossible to extend the monitoring range through secondary splicing. If forcibly disassembled and reassembled, it will not only interrupt the continuity of monitoring data, but may also cause subsequent data to be unable to connect with previous data due to installation errors. For ultra-deep foundation pits or foundation pits excavated in stages, this limitation of one-time installation will lead to the loss of data on deep soil deformation and settlement, forming a monitoring blind spot. The failure to detect deep hidden dangers may lead to the instability of the support structure and threaten the overall safety of the foundation pit. This application provides a foundation pit monitoring device.

[0006] The foundation pit monitoring device provided in this application adopts the following technical solution: A foundation pit monitoring device includes a support, a monitoring device, an adjusting component, an electrical connector, an extension, a measuring rod, and a settlement probe. The monitoring device is vertically fixedly assembled on the top of the support, and a threaded socket is fixed to the outer wall of the monitoring device. The electrical connector includes a cable, and a threaded sleeve is electrically connected and fixed to the top of the cable, with the threaded sleeve threadedly assembled into the threaded socket of the monitoring device. An extension is electrically assembled to the bottom of the cable, and the extension includes a helical tube and a helical cylinder. The top of the helical tube is electrically connected and assembled to the bottom of the cable, and a helical cylinder is assembled to the external thread of the helical tube. A measuring rod is vertically assembled to the bottom of the helical cylinder, and a settlement probe is assembled to the bottom of the measuring rod. An adjusting component is vertically arranged on one side of the top of the support, and the adjusting component is used to clamp the cable.

[0007] By adopting the above technical solution, in the foundation pit monitoring device, the support component is used to fix and support the entire device, ensuring its stability and safety. The monitoring equipment is used to monitor the settlement and deformation of the foundation pit in real time, and its threaded socket on the outer wall facilitates the installation and disassembly of the electrical connector. The electrical connector is connected to the monitoring equipment through a cable and a threaded sleeve, ensuring the transmission of power and signals. The extension component includes a helical tube and a helical sleeve, which are connected by threads, allowing the length of the measuring rod to be adjusted as needed, thus enabling the settlement probe to penetrate to different depths for accurate measurement. The settlement probe is directly installed at the end of the measuring rod to sense the settlement at different depths in the foundation pit. The adjusting component is used to fix and adjust the cable, ensuring that the cable is not damaged by external forces. The overall working principle is as follows: the monitoring equipment is fixedly installed through the support component, the monitoring equipment is connected to the extension component through the electrical connector, and the extension component can adjust the length of the measuring rod as needed, thus enabling the settlement probe to penetrate to different depths in the foundation pit for monitoring. At the same time, the adjusting component is used to ensure the stability and safety of the cable and guarantee the accuracy of the monitoring data.

[0008] Optionally, the support includes a support cylinder and a socket strip. The support cylinder is vertically fixed, and the socket strip is vertically slidably inserted into the support cylinder. A monitoring device is fixedly assembled on the top surface of the socket strip.

[0009] By adopting the above technical solution, the support cylinder serves as a fixing element, allowing the support component to be installed in the required position and providing stable vertical guidance. The socket strip slides up and down within the support cylinder, allowing the monitoring equipment to adjust its height as needed.

[0010] Optionally, a locking bolt is installed on the upper side of the outer wall of the support cylinder with a horizontal thread, and the locking bolt is inserted into the socket on the socket strip.

[0011] By adopting the above technical solution, the locking bolt is fastened to the upper side of the support cylinder. Through its engagement with the insertion holes on the insertion strip, the position of the insertion strip can be precisely fixed, ensuring the monitoring equipment is securely installed. The monitoring equipment is installed on the top surface of the insertion strip and is used for tasks such as environmental monitoring.

[0012] Optionally, the adjusting component includes a sliding frame and a screw hole slide. The sliding frame is vertically fixed to the top of the socket strip, and a screw hole slide is horizontally provided on one side of the sliding frame. The screw hole slide is vertically slidably assembled in the sliding frame, and a clamping frame is fixed to one end of the screw hole slide. The clamping frame at the end of the screw hole slide is fixedly clamped to the outer wall of the cable by bolts.

[0013] By adopting the above technical solution, the sliding frame is used to fix the position of the adjusting component, vertically fixed to the top of the socket strip, ensuring that the adjusting component is stably installed on the electrical socket. The screw hole slides up and down within the sliding frame, thereby adapting to the cable height under monitoring of different depth pits. The clamping frame is fixed to the end of the screw hole slide with bolts and fits tightly against the cable, ensuring that the cable is firmly clamped.

[0014] Optionally, an adjusting screw is vertically rotatably connected to the bottom surface of the slide frame, and the adjusting screw is threaded through the slide frame in the screw hole assembly.

[0015] By adopting the above technical solution, the adjusting screw is connected to the screw hole slide through the thread. Rotating the adjusting screw can change the position of the screw hole slide, thereby adjusting the pressure of the clamping frame and ensuring that the cable can be stably fixed under different installation conditions.

[0016] Optionally, the outer wall of the cable is fitted with a protective sleeve, and a magnetic ring is embedded and fixed at the top of the protective sleeve, and the magnetic ring is magnetically attracted to the threaded sleeve.

[0017] By adopting the above technical solution, the cable, as a major component for information or power transmission, is fitted with a protective sleeve made of high-density polyethylene to protect the cable from corrosion and extend its service life underground. A magnetic ring is embedded and fixed at the top of the protective sleeve. This magnetic ring has adsorption properties, ensuring the stability of the protective sleeve on the cable and facilitating installation and fixation.

[0018] Optionally, a first electrical connector female plug is electrically fixed to the bottom end of the cable, a first electrical connector plug is fixedly assembled to the top end of the solenoid, and the first electrical connector plug is electrically assembled and connected to the first electrical connector female plug. A spiral extension cable is vertically arranged inside the solenoid, and the top end of the extension cable is electrically connected to the first electrical connector plug. A second electrical connector plug is fixed to the bottom end of the solenoid, and the second electrical connector plug is electrically connected to the bottom end of the extension cable.

[0019] By adopting the above technical solution, the bottom of the cable receives electrical energy through a first electrical connector, and the top of the solenoid receives the electrical energy transmitted by the cable through a first electrical connector. A spiral extension cable is provided inside the solenoid, the top of which is connected to the first electrical connector to ensure that electrical energy is transmitted downwards. A second electrical connector is fixed to the bottom of the solenoid, which is connected to the bottom end of the extension cable to enable continued transmission of electrical energy.

[0020] Optionally, a second electrical connection female plug is electrically assembled at the top of the measuring rod, and the second electrical connection female plug is electrically assembled with the second electrical connection plug. A first flange ring is horizontally fixed at the bottom of the measuring rod, and a second flange ring is horizontally fixed at the top of the settlement probe. The settlement probe and the measuring rod are electrically connected by the first flange ring and the second flange ring.

[0021] By adopting the above technical solution, the top of the measuring rod is electrically connected to the second electrical connector of the screw barrel via the second electrical connector female plug to ensure stable power transmission. The flange ring at the bottom of the measuring rod is fixed to the flange ring at the top of the settlement probe by a snap-fit ​​method and is also electrically connected to ensure that the settlement probe can obtain the power required by the probe and operate efficiently and stably.

[0022] In summary, this application includes at least one of the following beneficial technical effects: A tiered electrical connection design for cables, extension components, measuring rods, and settlement probes forms a flexibly expandable monitoring depth adjustment system. The bottom end of the cable of the electrical connector connects quickly to the first electrical connector at the top of the extension component's helical tube via a first electrical connector female plug. The second electrical connector at the bottom of the extension component's helical tube precisely mates with the second electrical connector female plug at the top of the measuring rod. The bottom end of the measuring rod is bolted to the second flange ring of the settlement probe via a first flange ring, ensuring electrical continuity. The entire connection structure uses a standardized interface design, requiring no special tools and allowing a single person to complete the assembly, avoiding the cumbersome disassembly and reassembly required by traditional devices. Depending on the actual excavation depth requirements of the foundation pit, the monitoring stroke can be extended in segments by increasing the number of extension components or replacing them with longer measuring rods. Each extension segment can achieve depth extension, and multiple segments can be connected in series, with the maximum monitoring depth covering the monitoring needs of ultra-deep foundation pits. Compared to the limitations of traditional integrated devices that require one-time installation, this technology completely breaks the limitation of fixed monitoring depth. It can dynamically adjust the monitoring depth according to the progress of foundation pit excavation, effectively eliminating blind spots in the monitoring of deep soil and rock deformation and settlement data, and avoiding the risk of support structure instability caused by missed detection of deep hidden dangers. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a schematic diagram of the overall structure of the embodiment of this application in an exploded state; Figure 3 This is a schematic diagram of the structure of the adjusting component in the disassembled state according to an embodiment of this application; Figure 4 This is a schematic diagram of the electrical connector in an exploded state according to an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the extension of the embodiment of this application in an exploded state.

[0024] Explanation of reference numerals in the attached drawings: 1. Support component; 11. Support sleeve; 111. Locking bolt; 12. Insertion strip; 2. Monitoring equipment; 21. Threaded socket; 3. Adjusting component; 31. Sliding frame; 32. Screw hole slide; 33. Adjusting screw; 34. Clamping frame; 4. Electrical connector; 41. Cable; 42. Threaded sleeve; 43. Protective sleeve; 44. Magnetic ring; 45. First electrical connection female plug; 5. Extension component; 51. Screw tube; 52. Extension cable; 53. First electrical connection plug; 54. Screw tube; 6. Measuring rod; 61. Second electrical connection female plug; 62. First flange ring; 7. Settlement probe; 71. Second flange ring. Detailed Implementation

[0025] The present application will be further described in detail below with reference to the accompanying drawings.

[0026] This application discloses a foundation pit monitoring device. (Refer to...) Figure 1 , Figure 2 , Figure 4 and Figure 5 A foundation pit monitoring device includes a support 1, a monitoring device 2, an adjusting component 3, an electrical connector 4, an extension 5, a measuring rod 6, and a settlement probe 7. The monitoring device 2 is vertically fixedly assembled on the top of the support 1, and a threaded socket 21 is fixed on the outer wall of the monitoring device 2. The electrical connector 4 includes a cable 41, and a threaded sleeve 42 is electrically connected and fixed to the top of the cable 41. The threaded sleeve 42 is threadedly assembled in the threaded socket 21 of the monitoring device 2. An extension 5 is electrically assembled to the bottom of the cable 41. The extension 5 includes a helical tube 51 and a helical tube 54. The top of the helical tube 51 is electrically connected and assembled to the bottom of the cable 41, and the helical tube 51 is threadedly assembled with the helical tube 51. A measuring rod 6 is vertically assembled to the bottom of the helical tube 54, and a settlement probe 7 is assembled to the bottom of the measuring rod 6. An adjusting component 3 is vertically arranged on one side of the top of the support 1, and the adjusting component 3 is used to clamp the cable 41.

[0027] By adopting the above technical solution, in the foundation pit monitoring device, the support component 1 is used to fix and support the entire device, ensuring its stability and safety. The monitoring device 2 is used to monitor the settlement and deformation of the foundation pit in real time, and its threaded socket 21 on the outer wall facilitates the installation and disassembly of the electrical connector 4. The electrical connector 4 is connected to the monitoring device 2 through the cable 41 and the threaded socket 42, ensuring the transmission of power and signals. The extension component 5 includes a screw tube 51 and a screw barrel 54, which are connected by threads, allowing the length of the measuring rod 6 to be adjusted as needed, so that the settlement probe 7 can penetrate to different depths for accurate measurement. The settlement probe 7 is directly installed at the end of the measuring rod 6 to sense the settlement at different depths of the foundation pit. The adjusting component 3 is used to fix and adjust the cable 41, ensuring that the cable is not damaged by external forces. The overall working principle is as follows: the monitoring device 2 is fixedly installed through the support component 1, the monitoring device 2 is connected to the extension component 5 through the electrical connector 4, and the extension component 5 can adjust the length of the measuring rod 6 as needed, so that the settlement probe 7 can penetrate to different depths of the foundation pit for monitoring. Meanwhile, the adjusting component 3 is used to ensure the stability and safety of the cable 41 and to guarantee the accuracy of the monitoring data.

[0028] Reference Figure 3 The support component 1 includes a support cylinder 11 and a socket strip 12. The support cylinder 11 is vertically fixed, and the socket strip 12 is vertically slidably inserted into the support cylinder 11. A monitoring device 2 is fixedly assembled on the top surface of the socket strip 12. The support cylinder 11 serves as a fixing element, installing the support component 1 in the required position and providing stable vertical guidance. The socket strip 12 slides up and down within the support cylinder 11, allowing the monitoring device 2 to adjust its height as needed. A locking bolt 111 is horizontally threaded onto the upper side of the outer wall of the support cylinder 11, and the locking bolt 111 engages with the socket on the socket strip 12. The locking bolt 111 is fastened to the upper side of the support cylinder 11, and by engaging with the socket on the socket strip 12, the position of the socket strip 12 can be precisely fixed, ensuring the monitoring device 2 is securely installed. The monitoring device 2 is mounted on the top surface of the socket strip 12 and is used for tasks such as environmental monitoring.

[0029] Reference Figure 3The adjusting component 3 includes a sliding frame 31 and a screw-hole slide 32. The sliding frame 31 is vertically fixed to the top of the socket strip 12, and a screw-hole slide 32 is horizontally arranged on one side of the sliding frame 31. The screw-hole slide 32 is vertically slidably assembled in the sliding frame 31, and a clamping frame 34 is fixed to one end of the screw-hole slide 32. The clamping frame 34 at the end of the screw-hole slide 32 is fixedly clamped to the outer wall of the cable 41 by bolts. The sliding frame 31 is used to fix the position of the adjusting component 3, and is vertically fixed to the top of the socket strip 12 to ensure that the adjusting component 3 is stably installed on the electrical socket. The screw-hole slide 32 slides up and down in the sliding frame 31 to adapt to the height of the cable 41 under different depth pit monitoring. The clamping frame 34 is fixed to the end of the screw-hole slide 32 by bolts and is close to the cable 41 to ensure that the cable 41 is firmly clamped. An adjusting screw 33 is vertically rotatably connected to the bottom surface of the sliding frame 31, and the adjusting screw 33 is threaded through the screw-hole slide 32. The adjusting screw 33 is connected to the screw hole slide via a thread. Rotating the adjusting screw 33 can change the position of the screw hole slide 32, thereby adjusting the pressure of the clamping frame 34 and ensuring that the cable 41 can be stably fixed under different installation conditions.

[0030] Reference Figure 4 The cable 41 is fitted with a protective sleeve 43 on its outer wall, and a magnetic ring 44 is embedded and fixed at the top of the protective sleeve 43. The magnetic ring 44 is magnetically attracted to the threaded insert 42. As a main component for information or power transmission, the cable 41 is fitted with a protective sleeve 43, which is made of high-density polyethylene to protect the cable 41 from corrosion and extend its service life underground. The magnetic ring 44, which has adsorption properties, can be assembled to ensure the stability of the protective sleeve 43 on the cable 41 and facilitates installation and fixation.

[0031] Reference Figure 4 and Figure 5The bottom end of cable 41 is electrically fixed with a first electrical connector 45, and the top end of screw tube 51 is fixedly assembled with a first electrical connector 53, which is electrically connected to the first electrical connector 45. A spiral extension cable 52 is vertically arranged inside screw tube 51, and the top end of the extension cable 52 is electrically connected to the first electrical connector 53. The bottom end of screw tube 54 is fixed with a second electrical connector, which is electrically connected to the bottom end of the extension cable 52. The bottom of cable 41 receives power through the first electrical connector 45, and the top of screw tube 51 receives power from cable 41 through the first electrical connector 53. The spiral extension cable 52 inside screw tube 51 connects to the first electrical connector 53 at its top end, ensuring power transmission downwards. The bottom of screw tube 54 is fixed with a second electrical connector, which connects to the bottom end of the extension cable 52, enabling continued power transmission. The top of the measuring rod 6 is electrically equipped with a second electrical connection female plug 61, and the second electrical connection female plug 61 is electrically assembled with the second electrical connection plug. The bottom of the measuring rod 6 is horizontally fixed with a first flange ring 62, and the top of the settlement probe 7 is horizontally fixed with a second flange ring 71. The settlement probe 7 and the measuring rod 6 are electrically connected and fixedly assembled through the first flange ring 62 and the second flange ring 71. The top of the measuring rod 6 is electrically connected to the second electrical connection plug of the screw cylinder 54 through the second electrical connection female plug 61 to ensure stable power transmission. The flange ring 62 at the bottom of the measuring rod 6 and the flange ring 71 at the top of the settlement probe 7 are fixed by a snap-fit ​​method and electrically connected to ensure that the settlement probe 7 can obtain the power required by the probe and operate efficiently and stably.

[0032] The implementation principle of a foundation pit monitoring device according to an embodiment of this application is as follows: First, a protective sleeve 43 is fitted over the cable 41 used to transmit detection electrical signals in the electrical connector 4. The protective sleeve 43 is made of high-density polyethylene and is used to protect the cable 41 from corrosion and extend its service life underground. Then, the threaded plug 42 at the top of the cable 41 is threaded into the threaded socket 21 of the monitoring device 2. Next, the first electrical connector 53 at the top of the helical tube 51 in the extension 5 is electrically connected to the first electrical connector female connector 45 at the bottom of the cable 41. Then, the second electrical connector female connector 61 at the top of the measuring rod 6 is electrically connected to the second electrical connector at the bottom of the helical tube 54. Finally, the top of the settlement probe 7 is electrically connected to the bottom of the measuring rod 6 by bolts through the first flange ring 62 and the second flange ring 71. Then, during monitoring, according to the actual monitoring depth requirements, the insertion strip 12 is pulled and slid vertically in the insertion cylinder 11 to vertically adjust the height of the supporting monitoring device 2 and the height of the supporting cable 41. First, the detection depth is changed and adjusted. At the same time, the adjusting screw 33 on the bottom surface of the sliding frame 31 is rotated, and the threaded drive screw hole slide 32 slides vertically on the sliding frame 31 to clamp the cable 41 and adjust the support depth. The height requirement of the cable 41 for monitoring the pit depth is further adjusted. Finally, manually rotate the screw cylinder 54 on the solenoid 51 to extend it vertically, and pull the extension cable 52 to extend it, thereby controlling the depth adjustment of the detection pit of the settlement probe 7.

[0033] 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 foundation pit monitoring device, characterized in that, The system includes a support (1), a monitoring device (2), an adjusting component (3), an electrical connector (4), an extension component (5), a measuring rod (6), and a settlement probe (7). The monitoring device (2) is vertically fixed to the top of the support (1), and a threaded socket (21) is fixed to the outer wall of the monitoring device (2). The electrical connector (4) includes a cable (41), and a threaded insert (42) is electrically connected and fixed to the top of the cable (41). The threaded insert (42) is threadedly assembled into the threaded socket (21) of the monitoring device (2). An extension member (5) is electrically assembled at the bottom end of the cable (41). The extension member (5) includes a helical tube (51) and a screw barrel (54). The top end of the helical tube (51) is electrically connected to the bottom end of the cable (41). The screw barrel (54) is assembled on the external thread of the helical tube (51). The measuring rod (6) is vertically assembled at the bottom end of the screw barrel (54). The settlement probe (7) is assembled at the bottom end of the measuring rod (6). The adjusting member (3) is vertically arranged on one side of the top of the support member (1). The adjusting member (3) is used to clamp the cable (41).

2. The foundation pit monitoring device according to claim 1, characterized in that: The support member (1) includes a support tube (11) and a socket strip (12). The support tube (11) is vertically fixed, and the socket strip (12) is vertically slidably inserted into the support tube (11). The monitoring device (2) is fixedly assembled on the top surface of the socket strip (12).

3. The foundation pit monitoring device according to claim 2, characterized in that: The upper side of the outer wall of the support tube (11) is fitted with a locking bolt (111) by a horizontal thread, and the locking bolt (111) is inserted into the socket on the insertion strip (12).

4. The foundation pit monitoring device according to claim 1, characterized in that: The adjusting component (3) includes a sliding frame (31) and a screw hole slide (32). The sliding frame (31) is vertically fixed to the top of the insertion strip (12), and the screw hole slide (32) is horizontally arranged on one side of the sliding frame (31). The screw hole slide (32) is vertically slidably assembled in the sliding frame (31), and a clamping frame (34) is fixed at one end of the screw hole slide (32). The clamping frame (34) at the end of the screw hole slide (32) is clamped and assembled on the outer wall of the cable (41) by bolts.

5. The foundation pit monitoring device according to claim 4, characterized in that: An adjusting screw (33) is vertically rotatably connected to the bottom surface of the sliding frame (31), and the adjusting screw (33) is threaded through the sliding frame (32).

6. The foundation pit monitoring device according to claim 1, characterized in that: The outer wall of the cable (41) is fitted with a protective sleeve (43), and a magnetic ring (44) is embedded and fixed at the top of the protective sleeve (43), and the magnetic ring (44) is magnetically attracted to the threaded insert (42).

7. The foundation pit monitoring device according to claim 1, characterized in that: The bottom end of the cable (41) is electrically fixed with a first electrical connection female plug (45), the top end of the solenoid (51) is fixedly assembled with a first electrical connection plug (53), and the first electrical connection plug (53) is electrically assembled and connected with the first electrical connection female plug (45). The inside of the solenoid (51) is vertically arranged with a spiral extension cable (52), and the top end of the extension cable (52) is electrically connected with the first electrical connection plug (53). The bottom end of the screw cylinder (54) is fixed with a second electrical connection plug, and the second electrical connection plug is electrically connected with the bottom end of the extension cable (52).

8. The foundation pit monitoring device according to claim 7, characterized in that: The top end of the measuring rod (6) is electrically assembled with a second electrical connection female plug (61), and the second electrical connection female plug (61) is electrically assembled with the second electrical connection plug. The bottom end of the measuring rod (6) is horizontally fixed with a first flange ring (62), and the top end of the settlement probe (7) is horizontally fixed with a second flange ring (71). The settlement probe (7) and the measuring rod (6) are electrically connected by the first flange ring (62) and the second flange ring (71).

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