Foundation pit safety state real-time monitoring and early warning device

Abstract

The utility model relates to the technical field of foundation pit monitoring, in particular to a real-time monitoring and early warning device for the safety state of a foundation pit. The real-time monitoring and early warning device for the safety state of the foundation pit comprises a foot stool capable of being installed on the ground of the foundation pit, a fixed shaft barrel is arranged at the lower end of the center of the foot stool and installed in a drill hole formed in the foundation pit, and the lower end of the fixed shaft barrel is connected with an inner shaft barrel through a connecting spring; the lower end of the inner shaft barrel is provided with the fixed shaft barrel in a threaded connection mode, and displacement sensors are fixedly arranged at the positions, located at the connecting positions of the fixed shaft barrel and the upper end of the inner shaft barrel, of the fixed shaft barrel. According to the utility model, local or integral settlement in the foundation pit and on the surface of the foundation pit can be monitored at the same time, so that settlement changes of different positions of the foundation pit can be captured in real time, the settlement condition of each area in the foundation pit can be evaluated more accurately, and the overall monitoring precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit monitoring, in particular to a real-time monitoring and early warning device for the safety status of a foundation pit. Background Art

[0002] In civil engineering, foundation pit is an important part of urban construction and underground space development and utilization. It involves the preliminary construction of various construction projects such as building foundations and underground garages. The safety status of the foundation pit is directly related to the quality, construction period and life safety of the construction workers. Therefore, it is very important to monitor the safety status of the foundation pit in real time and issue early warning in time.

[0003] Existing foundation pit monitoring technology is mainly concentrated on the periphery of the foundation pit, but there is a lack of effective monitoring methods for the settlement inside the foundation pit. The settlement inside the foundation pit will not only affect the stability of the foundation pit itself, but also pose a threat to the construction activities in the foundation pit and the safety of surrounding buildings.

[0004] Therefore, it is necessary to provide a real-time monitoring and early warning device for the safety status of a foundation pit to solve the problems in the above-mentioned background technology. Utility Model Content

[0005] In response to the above problems, the present application provides a real-time monitoring and early warning device for the safety status of a foundation pit, which can simultaneously detect the surface and internal settlement of the foundation pit, so that it can instantly capture the local or overall settlement changes of the foundation pit and quickly issue an early warning. It is conducive to multiple displacement sensors distributed at different positions inside the foundation pit for multi-point monitoring, and can provide more comprehensive and detailed settlement data, which helps to more accurately evaluate the settlement conditions of various areas inside the foundation pit, thereby improving the overall accuracy of monitoring.

[0006] To achieve the purpose of this application, this application provides the following technical solutions:

[0007] The present application provides a real-time monitoring and early warning device for the safety status of a foundation pit, comprising: a tripod, a fixed shaft cylinder and an inner shaft cylinder, wherein the tripod can be installed on the ground of the foundation pit, a fixed shaft cylinder is arranged at the central lower end of the tripod, the fixed shaft cylinder is installed in a drilled hole opened in the foundation pit, and the lower end of the fixed shaft cylinder is connected with the inner shaft cylinder through a connecting spring, the lower end of the inner shaft cylinder can be provided with the fixed shaft cylinder through a threaded connection, an early warning device is fixedly arranged at the upper end of the tripod, a through hole 1 is opened at the center of the early warning device, a central rotating shaft is movably arranged in the through hole 1, the fixed shaft cylinder and the inner shaft cylinder, and a displacement sensor is fixedly arranged on the fixed shaft cylinder located at the connection between the fixed shaft cylinder and the upper end of the inner shaft cylinder, the fixed shaft cylinder comprises an outer shaft cylinder which can be fixed to the tripod, fixed to the lower end of the inner shaft cylinder through threads, and connected to the upper end of the inner shaft cylinder through the connecting spring, and a plug-in positioning component which can be engaged with the drilled hole is arranged on the outer shaft cylinder.

[0008] In a possible implementation, a handle is fixedly provided on the upper end of the central rotating shaft.

[0009] In a possible implementation, the tripod includes: a positioning plate, a through hole two is opened at the axis center of the positioning plate, and a plurality of positioning feet are hingedly arranged on the positioning plate, the lower end of the positioning plate is threadedly fixed with the fixed shaft cylinder through a threaded sleeve, and a plurality of adjustment rods are hingedly arranged on the outer side of the threaded sleeve, the plurality of adjustment rods are hingedly arranged with the plurality of positioning feet, and an angular displacement sensor is installed on each of the positioning feet.

[0010] In a possible implementation, a plurality of preset holes are uniformly arrayed on the circumference of the outer shaft cylinder.

[0011] In a possible implementation, the plug-in positioning assembly includes a fixed disk fixed in the outer shaft cylinder, the upper end surface of the fixed disk is evenly provided with a plurality of guide grooves, and a guide wire is rotatably arranged in the fixed disk, a through hole three is arranged in the guide wire, an internal threaded hole is arranged in the through hole three, a diffuser cylinder is movably arranged in the guide groove through the guide wire, guide holes are arranged in the circumferential direction of the diffuser cylinder, and positioning threaded holes are arranged in the radial direction of the diffuser cylinder, a diffuser knife is detachably connected in the guide hole, and the diffuser knife can be fixed in the guide hole through bolts and the positioning threaded hole.

[0012] In a possible implementation, the diffuser blade is telescopically disposed in the preset hole.

[0013] In a possible implementation, the central rotating shaft is movably disposed in the through hole one, the through hole two, the through hole three and the inner shaft cylinder.

[0014] In a possible implementation, an external threaded shaft is fixedly provided on the central rotating shaft located at the internal threaded hole.

[0015] The beneficial effects of the utility model are:

[0016] The utility model monitors the relative displacement between the fixed shaft cylinder and the inner shaft cylinder respectively arranged inside the foundation pit borehole through multiple displacement sensors, so that it can capture the settlement changes inside the foundation pit in real time and can quickly warn, which is conducive to the distribution of multiple displacement sensors at different positions inside the foundation pit for multi-point monitoring, and can also monitor the deflection of the positioning foot through the angular displacement sensor on the tripod, so as to monitor the settlement and overall settlement of various parts of the foundation pit ground. The angular displacement sensor can capture the local and overall settlement changes of the foundation pit structure, so that the surface and internal settlement changes of the foundation pit can be monitored at the same time, and further, more comprehensive and detailed settlement data can be provided, which is helpful to more accurately evaluate the settlement conditions of various parts and areas of the foundation pit, thereby improving the overall monitoring accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation to the present application.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the tripod in the utility model;

[0020] Figure 3 It is a structural schematic diagram of the fixed shaft disc and the inner shaft cylinder in the utility model;

[0021] Figure 4 It is a structural schematic diagram of the plug-in positioning component in the utility model;

[0022] Figure 5 It is a structural schematic diagram of the central rotating shaft in the utility model;

[0023] Figure numerals: 1. drilling hole; 2. tripod; 3. fixed shaft cylinder; 4. inner shaft cylinder; 5. early warning device; 6. central shaft; 7. handle; 8. connecting spring; 9. displacement sensor; 21. positioning plate; 22. adjusting rod; 23. positioning foot; 31. outer shaft cylinder; 32. plug-in positioning assembly; 61. external threaded shaft; 321. fixed plate; 322. guide groove; 323. guide wire; 324. internal threaded hole; 325. diffuser cylinder; 326. guide hole; 327. positioning threaded hole; 328. diffuser knife. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of this application clearer, the technical solution in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of this application, unless otherwise specified, "plurality" means three or more.

[0026] Figure 1-Figure 5 The real-time monitoring and early warning device for the safety status of a foundation pit provided in the embodiment of the present application comprises: a tripod 2, a fixed shaft cylinder 3 and an inner shaft cylinder 4, wherein the tripod 2 can be installed on the ground of the foundation pit, a fixed shaft cylinder 3 is arranged at the central lower end of the tripod 2, the fixed shaft cylinder 3 is installed in a borehole 1 opened in the foundation pit, and the lower end of the fixed shaft cylinder 3 is connected to the inner shaft cylinder 4 through a connecting spring 8, the lower end of the inner shaft cylinder 4 can be provided with the fixed shaft cylinder 3 through a threaded connection, and an early warning device 5 is fixedly arranged at the upper end of the tripod 2, and the early warning device 5 is provided with a plurality of springs. A through hole 1 is opened at the center, and a central rotating shaft 6 is movably provided in the through hole 1, the fixed shaft cylinder 3 and the inner shaft cylinder 4, and a displacement sensor 9 is fixedly provided on the fixed shaft cylinder 3 located at the connection between the fixed shaft cylinder 3 and the upper end of the inner shaft cylinder 4. The fixed shaft cylinder 3 includes an outer shaft cylinder 31 which can be fixed to the tripod 2, fixed to the lower end of the inner shaft cylinder 4 by threads, and connected to the upper end of the inner shaft cylinder 4 by the connecting spring 8. The outer shaft cylinder 31 is provided with a plug-in positioning component 32 which can be engaged with the drill hole 1.

[0027] Optionally, the early warning device 5 can feedback different early warning signals according to different settlement data of the foundation pit.

[0028] Based on the above technical solution, a borehole 1 is first opened in the foundation pit, and a suitable number of fixed shaft cylinders 3 and inner shaft cylinders 4 are selected according to the length of the borehole 1, and the fixed shaft cylinder 3 and the inner shaft cylinder 4 are assembled, and then the fixed shaft cylinder 3 and the inner shaft cylinder 4 are placed in the borehole 1, and then the tripod 2 is adjusted and positioned on the surface of the foundation pit so that the plug-in positioning component 32 is engaged with each soil layer in the borehole 1. When the displacement sensor 9 detects that the fixed shaft cylinder 3 has shifted, it is determined as a single-layer or multi-layer settlement in the foundation pit according to the position of the displacement sensor 9, and an early warning is issued by matching the early warning device 5, and the local or overall settlement changes on the surface of the foundation pit can also be monitored through the tripod 2.

[0029] On the basis of the above technical scheme, a plurality of displacement sensors 9 are used to monitor the relative displacement between the fixed shaft cylinder 3 and the inner shaft cylinder 4 respectively arranged inside the foundation pit borehole 1, so that the settlement changes inside the foundation pit can be captured in real time, and a warning can be quickly issued through the early warning device 5, which is conducive to the distribution of a plurality of displacement sensors 9 at different positions inside the foundation pit for multi-point monitoring, and can provide more comprehensive and detailed settlement data, which is helpful to more accurately evaluate the settlement conditions of various areas inside the foundation pit, and can also monitor the settlement data inside the foundation pit and on the surface of the foundation pit together, thereby improving the overall monitoring accuracy.

[0030] In a possible implementation, a handle 7 is fixedly provided on the upper end of the central rotating shaft 6 , and the rotation direction of the central rotating shaft 6 is adjusted by the handle 7 .

[0031] In one possible implementation, the tripod 2 includes: a positioning plate 21, a through hole 2 is opened at the axis center of the positioning plate 21, and a plurality of positioning feet 23 are hingedly arranged on the positioning plate 21, the lower end of the positioning plate 21 is threadedly fixed with the fixed shaft cylinder 3 through a threaded sleeve, and a plurality of adjustment rods 22 are hingedly arranged on the outer side of the threaded sleeve, the plurality of adjustment rods 22 are hingedly arranged with the plurality of positioning feet 23, and an angular displacement sensor is installed on each of the positioning feet 23.

[0032] By adopting the above technical solution, the angular displacement sensors installed on the positioning foot 23 are labeled a, b, c... in sequence. When the angular displacement sensor a monitors the settlement data, it is the local settlement of one side of the foundation pit surface; when the angular displacement sensors a and b both monitor the settlement data, it is the local settlement of a large range of the foundation pit surface; and so on; until all the angular displacement sensors monitor the settlement data, it is the overall settlement of the foundation pit surface, so that the early warning device 5 can perform early warnings in different ways.

[0033] On the basis of the above technical scheme, the deflection of the positioning foot 23 is monitored by the angular displacement sensor on the tripod 2, thereby monitoring the settlement of various parts of the foundation pit ground and the overall settlement, which can capture the local and overall settlement changes of the foundation pit structure, help to discover local and overall settlement data at an early stage, and improve the settlement detection accuracy of the foundation pit surface, thereby combining the monitoring methods of the foundation pit surface and its internal settlement, which can more effectively feedback the settlement data of the foundation pit, monitor the settlement data more comprehensively and meticulously, and improve the safety monitoring factor of the foundation pit.

[0034] In a possible implementation, the outer shaft cylinder 31 is provided with a plurality of preset holes in a uniform array in the circumferential direction.

[0035] In one possible implementation, the plug-in positioning assembly 32 includes a fixed disk 321 fixed in the outer shaft cylinder 31, the upper end surface of the fixed disk 321 is evenly provided with a plurality of guide grooves 322, and a guide wire 323 is rotatably arranged in the fixed disk 321, a through hole three is arranged in the guide wire 323, an internal threaded hole 324 is arranged in the through hole three, a diffuser cylinder 325 is movably arranged in the guide groove 322 through the guide wire 323, a guide hole 326 is arranged in the circumferential direction of the diffuser cylinder 325, and a positioning threaded hole 327 is arranged in the radial direction of the diffuser cylinder 325, a diffuser knife 328 is detachably connected in the guide hole 326, and the diffuser knife 328 can be fixed in the guide hole 326 through bolts and the positioning threaded hole 327.

[0036] Through the above technical solution, the diffuser knife 328 is first fixed in the guide hole 326 by the cooperation of the bolt and the positioning threaded hole 327, and then the diffuser knife 328 can be moved along the guide groove 322 by rotating the guide wire 323.

[0037] In one possible implementation, the diffuser knife 328 is retractably arranged in the preset hole. When the diffuser knife 328 is retracted into the outer shaft cylinder 31, it is convenient to assemble the fixed shaft cylinder 3 and the inner shaft cylinder 4 and install them in the borehole 1; when the diffuser knife 328 extends out of the outer shaft cylinder 31, it is convenient to fix the fixed shaft cylinder 3 in the borehole 1.

[0038] In a possible implementation, the central rotating shaft 6 is movably disposed in the through hole 1, the through hole 2, the through hole 3 and the inner shaft cylinder 4 .

[0039] In a possible implementation, an external threaded shaft 61 is fixedly provided on the central rotating shaft 6 located at the internal threaded hole 324 .

[0040] By adopting the above technical scheme, the rotation of the guide wire 323 can be adjusted by rotating the center shaft 6, that is, by rotating the external threaded shaft 61. Before the fixed shaft cylinder 3 and the inner shaft cylinder 4 are assembled and installed in the borehole 1, the rotation of the center shaft 6 is adjusted so that the diffuser cylinder 325 and the diffuser knife 328 are retracted into the outer shaft cylinder 31; after the fixed shaft cylinder 3 and the inner shaft cylinder 4 are assembled and installed in the borehole 1, the rotation of the center shaft 6 is adjusted so that the diffuser cylinder 325 moves away from the axis, and the diffuser knife 328 is stuck with each soil layer in the borehole 1. The displacement sensor 9 reflects the settlement conditions and data inside the foundation pit by monitoring the joint movement of the fixed shaft cylinder 3 and the soil.

[0041] On the basis of the above technical solution, the displacement sensors 9 are numbered I, II, III... from top to bottom in the borehole 1. When displacement sensor No. I 9 detects settlement data, it is a single-layer settlement inside the foundation pit; when displacement sensors No. I and No. II 9 both detect settlement data, it is a multi-layer settlement inside the foundation pit; and so on; until all displacement sensors 9 detect settlement data, it is an overall settlement inside the foundation pit, so that the early warning device 5 can perform early warnings in different ways.

[0042] Working principle:

[0043] First, a borehole 1 is opened in the foundation pit. According to the length of the borehole 1, a suitable number of fixed shaft cylinders 3 and inner shaft cylinders 4 are selected, and the fixed shaft cylinders 3 and the inner shaft cylinders 4 are assembled. The central rotating shaft 6 is rotated by the handle 7 to rotate the guide wire 323, driving the diffuser cylinder 325 and the diffuser knife 328 to shrink into the outer shaft cylinder 31, and then the fixed shaft cylinder 3 and the inner shaft cylinder 4 are placed into the borehole 1. Then, the positioning feet 23 of the tripod 2 are adjusted to position the tripod 2 on the surface of the foundation pit, and then the central rotating shaft 6 is rotated by the handle 7 to rotate the guide wire 323. The wire 323 rotates, driving the diffuser cylinder 325 to move away from the axis, so that the diffuser knife 328 is engaged with each soil layer in the borehole 1. When the angular displacement sensor detects the deflection of the positioning foot 23, it is determined based on the data that it is local settlement or overall settlement of the foundation pit surface, and an early warning is issued by matching the early warning device 5; when the displacement sensor 9 detects that the fixed shaft cylinder 3 is shifted, it is determined based on the position of the displacement sensor 9 that it is single-layer or multi-layer settlement in the foundation pit, and an early warning is issued by matching the early warning device 5.

[0044] The above embodiments are only used to illustrate the technical solution of the present application, but not to limit it. The present application is not limited to the exact structure described above and illustrated in the accompanying drawings, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, various changes and modifications made without departing from the concept of the present application should be deemed to belong to the protection scope of the present application.

Claims

1. Real-time monitoring and early warning device for foundation pit safety status, characterized in that: include: A tripod (2), a fixed shaft cylinder (3) and an inner shaft cylinder (4), wherein the tripod (2) can be installed on the ground of a foundation pit, a fixed shaft cylinder (3) is arranged at the central lower end of the tripod (2), the fixed shaft cylinder (3) is installed in a borehole (1) opened in the foundation pit, and the lower end of the fixed shaft cylinder (3) is connected to the inner shaft cylinder (4) via a connecting spring (8), and the lower end of the inner shaft cylinder (4) can be connected to the fixed shaft cylinder (3) via a threaded connection, and an early warning device (5) is fixedly arranged at the upper end of the tripod (2), and a through hole 1 is opened at the center of the early warning device (5), and the through hole 1, A central rotating shaft (6) is movably arranged in the fixed shaft cylinder (3) and the inner shaft cylinder (4), and a displacement sensor (9) is fixedly arranged on the fixed shaft cylinder (3) at the connection between the upper ends of the fixed shaft cylinder (3) and the inner shaft cylinder (4). The fixed shaft cylinder (3) comprises an outer shaft cylinder (31) which can be fixed to the tripod (2), fixed to the lower end of the inner shaft cylinder (4) by threads, and connected to the upper end of the inner shaft cylinder (4) by the connecting spring (8). The outer shaft cylinder (31) is provided with a plug-in positioning component (32) which can be engaged with the drill hole (1).

2. The real-time monitoring and early warning device for foundation pit safety status according to claim 1 is characterized in that: A handle (7) is fixedly provided on the upper end of the central rotating shaft (6).

3. The real-time monitoring and early warning device for foundation pit safety status according to claim 1 is characterized in that: The tripod (2) comprises: a positioning plate (21), wherein two through holes are provided at the axis of the positioning plate (21), and a plurality of positioning feet (23) are hingedly provided on the positioning plate (21), the lower end of the positioning plate (21) is threadedly fixedly provided with the fixed shaft cylinder (3) via a threaded sleeve, and a plurality of adjustment rods (22) are hingedly provided on the outer side of the threaded sleeve, the plurality of adjustment rods (22) are hingedly provided with the plurality of positioning feet (23), and an angular displacement sensor is installed on each of the positioning feet (23).

4. The real-time monitoring and early warning device for foundation pit safety status according to claim 3 is characterized in that: The outer shaft cylinder (31) is provided with a plurality of preset holes in a uniform array in the circumferential direction.

5. The real-time monitoring and early warning device for foundation pit safety status according to claim 4 is characterized in that: The plug-in positioning assembly (32) includes a fixed disk (321) fixed in the outer shaft cylinder (31), the upper end surface of the fixed disk (321) is evenly provided with a plurality of guide grooves (322), and a guide wire (323) is rotatably arranged in the fixed disk (321), a through hole three is arranged in the guide wire (323), an internal threaded hole (324) is arranged in the through hole three, a diffuser cylinder (325) is movably arranged in the guide groove (322) through the guide wire (323), a guide hole (326) is arranged in the circumferential direction of the diffuser cylinder (325), and a positioning threaded hole (327) is arranged in the radial direction of the diffuser cylinder (325), a diffuser knife (328) is detachably connected and arranged in the guide hole (326), and the diffuser knife (328) can be fixed in the guide hole (326) through a bolt and the positioning threaded hole (327).

6. The real-time monitoring and early warning device for foundation pit safety status according to claim 5 is characterized in that: The pressure diffuser blade (328) is telescopically arranged in the preset hole.

7. The real-time monitoring and early warning device for foundation pit safety status according to claim 5 is characterized in that: The central rotating shaft (6) is movably arranged in the through hole one, the through hole two, the through hole three and the inner shaft cylinder (4).

8. The real-time monitoring and early warning device for foundation pit safety status according to claim 5 is characterized in that: An external threaded shaft (61) is fixedly arranged on the central rotating shaft (6) located at the internal threaded hole (324).

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