An automatic deformation monitoring device for subway foundation pit

Abstract

The present invention relates to the field of foundation pit construction monitoring, and in particular to an automated deformation monitoring device for a subway foundation pit, comprising a main body, a crawler drive unit is arranged at the bottom of the main body, a top bracket is fixedly arranged at the upper end of the main body, a monitoring box is fixedly arranged at the center of the main body, a motor is fixedly arranged at the center of the upper end of the top bracket, a first slide is arranged on the inner walls on both sides of the main body, a moving component is slidably installed in the first slide, a second slide is arranged on the inner walls on both sides of the top bracket, and a feedback component is slidably installed in the second slide. The present invention can automatically monitor the deformation process of the subway foundation pit, and the subtle deformation process of the foundation pit in the horizontal or vertical direction can be accurately fed back by using the front and rear point changes of the laser, which effectively improves the monitoring accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit construction monitoring, and in particular to an automatic deformation monitoring device for a subway foundation pit. Background Art

[0002] Urban subways have been a hot spot for infrastructure investment in my country in recent years, and the vigorous development of urban subways has become the focus of municipal construction in large and medium-sized cities. Subway foundation pit monitoring is a crucial part of subway construction. It involves multiple aspects of monitoring content and methods, aiming to ensure the safety and stability of the foundation pit during construction, prevent the occurrence of adverse phenomena such as foundation pit collapse, ground subsidence, and ground cracking, and ensure the safety of subway construction and the surrounding environment.

[0003] Since subway foundation pits are relatively long and narrow, and their deformation process is subtle and slow, existing monitoring equipment can often only perform simple observations using instruments such as inclinometers or crack meters. However, foundation pit monitoring requires high accuracy of monitoring data, and the accuracy of current monitoring equipment needs to be further improved. Summary of the invention

[0004] The purpose of the present invention is to provide an automated deformation monitoring device for a subway foundation pit, aiming to solve the above-mentioned technical problems.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] An automated deformation monitoring device for a subway foundation pit comprises a main body, a crawler drive unit is provided at the bottom of the main body, a top bracket is fixedly provided at the upper end of the main body, a monitoring box is fixedly provided at the center of the main body, a motor is fixedly provided at the center of the upper end of the top bracket, first slide grooves are provided on the inner walls on both sides of the main body, a moving component is slidably installed in the first slide grooves, second slide grooves are provided on the inner walls on both sides of the top bracket, and a feedback component is slidably installed in the second slide grooves.

[0007] The feedback component includes a supporting plate, a pressing plate and a measuring rod, slide seats are provided at both ends of the pressing plate, and the slide seats are adapted to be slidably installed in the second sliding groove, the pressing plates are symmetrically arranged at both ends of the main body, the supporting plate is movably arranged on the side of the pressing plate away from the monitoring box, and the end of the supporting plate away from the pressing plate is arranged with earth-breaking teeth, and a measuring rod is fixedly arranged on the end of the supporting plate close to the pressing plate, and a yielding groove is penetrated by the pressing plate, and accommodating cavities are provided at both ends of the monitoring box, and the measuring rods at both ends pass through the yielding grooves and extend into the corresponding accommodating cavities, and a mounting frame is provided at the end of the measuring rod, and a laser emitter and a paintbrush are fixedly arranged on both sides of the mounting frame, and a photosensitive test board and a recording drawing board are fixedly arranged on the inner walls on both sides of the accommodating cavity, respectively, and the laser emitter is arranged vertically toward the photosensitive test board, and the paintbrush is abutted against the surface of the recording drawing board.

[0008] As a further solution of the present invention: sliding rods are provided at the four corners of one end of the support plate close to the pressure plate, and extension brackets are provided at the four corners of one end of the pressure plate close to the support plate. A movable slider is installed in the extension bracket for sliding up and down, and the upper and lower ends of the movable slider are connected to the extension bracket through a longitudinal spring, the sliding rod slides through the corresponding movable slider, and a transverse spring is provided between the movable slider and the support plate.

[0009] As a further solution of the present invention: the moving component includes a group of mounting frames arranged relatively to each other, a row of moving auxiliary wheels are rotatably installed inside the mounting frames, slide rails are arranged on the outer walls on both sides of the mounting frames, the slide rails are adapted to be slidably installed in the first slide groove, and toothed straight plates are fixedly arranged on the inner walls of the mounting frames at both ends, and the two groups of toothed straight plates are arranged in a centrally symmetrical manner.

[0010] As a further solution of the present invention: the output end of the motor is fixedly connected to a driving shaft, and a driving gear is fixedly sleeved on the driving shaft. The driving gear is simultaneously gear-engaged with two sets of toothed straight plates, and the bottom end of the driving shaft is fixedly connected to a rotating plate, both ends of the rotating plate are rotationally engaged with one end of a connecting rod, and the other end of the connecting rod is rotationally engaged with a corresponding pressure plate.

[0011] As a further solution of the present invention: the driving shaft drives the mounting frames at both ends and the pressing plates at both ends to move synchronously, and the moving directions of the mounting frames and the pressing plates are opposite.

[0012] As a further solution of the present invention: a display screen is arranged on the front end surface of the monitoring box, the photosensitive test board is electrically connected to the display screen, and the photosensitive test board receives the laser signal and processes it for display on the display screen.

[0013] As a further solution of the present invention: a socket for maintenance and replacement is provided at the top of the monitoring box corresponding to the position of the photosensitive test board and the recording drawing board.

[0014] Beneficial effects of the present invention:

[0015] (1) By setting up a feedback component, during the monitoring process, the main body moves to the position to be monitored in the foundation pit through the crawler drive unit, and the motor drives the pressure plates at both ends to slide outward in a straight line until the outer support plate gradually approaches the foundation pit and finally rests on the inner wall of the foundation pit. The soil-breaking teeth on the end face of the support plate will drill into the soil layer of the pit wall, so that the support plate and the pit wall are completely in contact. When the inner wall of the foundation pit gradually deforms, the force exerted by the pit wall on the support plate will be transmitted to the measuring rod, so that the measuring rod changes its position synchronously in the accommodating cavity of the monitoring box. The specific deformation process of the pit wall can be recorded intuitively and vividly through the traces of the brush on the recording board. At the same time, the laser transmitter will periodically emit laser. The point position changes of the laser signal received by the photosensitive test board before and after the period can be used to analyze and calculate the specific values ​​of the lateral and longitudinal displacements of the pit wall, thereby realizing the automatic monitoring process of the deformation process of the subway foundation pit. The subtle lateral or longitudinal deformation process of the foundation pit can be accurately fed back by the point position changes of the laser before and after, which effectively improves the monitoring accuracy.

[0016] (2) By setting up a moving component, the motor drives the driving gear to rotate through the driving shaft, and the driving gear drives the mounting frames at both ends to move toward each other through the tooth groove straight plate. At the same time, the driving shaft will synchronously drive the pressure plates at both ends to slide in the opposite direction through the rotating plate and the connecting rod. During monitoring, the pressure plate extends outward until the support plate rests on the pit wall. At this time, the mounting frame retracts into the top bracket. During movement, the mounting frame extends outward until the moving auxiliary wheel rests on the pit wall. At this time, the support plate retracts into the inner cavity of the main body, so that the monitoring equipment can be flexibly switched between the monitoring process and the moving process, so as to facilitate the monitoring equipment to effectively monitor different positions of the foundation pit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic structural diagram of the main body in the present invention.

[0020] Figure 3 It is a structural schematic diagram of the mobile component in the present invention.

[0021] Figure 4 It is a structural schematic diagram of the feedback component in the present invention.

[0022] Figure 5 yes Figure 4 A schematic diagram of the enlarged structure at point A in the middle.

[0023] Figure 6 It is a schematic diagram of the internal structure of the monitoring box in the present invention.

[0024] Figure 7 It is a schematic diagram of two working states of the present invention.

[0025] Figure 8 It is a working schematic diagram of foundation pit deformation monitoring of the present invention.

[0026] In the figure: 1. main body; 101. first slide; 2. crawler drive unit; 3. top bracket; 301. second slide; 4. monitoring box; 401. accommodating chamber; 402. photosensitive test board; 403. recording board; 5. motor; 501. drive shaft; 502. drive gear; 503. rotating plate; 504. connecting rod; 6. moving assembly; 601. mounting bracket; 602. moving auxiliary wheel; 603. slide rail; 604. toothed straight plate; 7. feedback assembly; 71. support plate; 711. earth-breaking tooth blade; 712. slide bar; 713. transverse spring; 721. slide seat; 722. give way notch; 723. extension bracket; 724. movable slider; 725. longitudinal spring; 72. pressing plate; 73. measuring rod; 731. mounting seat; 732. laser transmitter; 733. paintbrush. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1 and Figure 2 As shown, the present invention is an automated deformation monitoring device for a subway foundation pit, comprising a main body 1, a crawler drive unit 2 is arranged at the bottom of the main body 1, a top bracket 3 is fixedly arranged at the upper end of the main body 1, a monitoring box 4 is fixedly arranged at the center of the main body 1, a motor 5 is fixedly arranged at the center of the upper end of the top bracket 3, first slide grooves 101 are arranged on the inner walls on both sides of the main body 1, a moving component 6 is slidably installed in the first slide groove 101, second slide grooves 301 are arranged on the inner walls on both sides of the top bracket 3, and a feedback component 7 is slidably installed in the second slide groove 301.

[0029] Specifically, the crawler drive unit 2 can drive the main body 1 to move in the narrow and long subway pit. At the same time, a cavity for accommodating the feedback component 7 is provided inside the main body 1. When the main body 1 is moving, the moving component 6 extends from both ends of the top bracket 3 to assist the movement, and the feedback component 7 is retracted inside the main body 1. When monitoring is performed, the moving component 6 retreats into the top bracket 3, and the feedback component 7 slides out from the internal cavity of the main body 1.

[0030] like Figure 4 and Figure 6 As shown, the feedback assembly 7 includes a supporting plate 71, a pressing plate 72 and a measuring rod 73. Slide seats 721 are arranged at both ends of the pressing plate 72. The slide seats 721 are adapted to be slidably installed in the second slide groove 301. The pressing plates 72 are symmetrically arranged at both ends of the main body 1. The supporting plate 71 is movably arranged on the side of the pressing plate 72 away from the monitoring box 4. The end of the supporting plate 71 away from the pressing plate 72 is arranged with earth-breaking teeth 711. The end of the supporting plate 71 close to the pressing plate 72 is fixedly provided with a measuring rod 73. The pressing plate 72 is penetrated with a clearance slot 722. , accommodating cavities 401 are provided at both ends of the interior of the monitoring box 4, and the measuring rods 73 at both ends pass through the making way slots 722 and extend into the corresponding accommodating cavities 401, and mounting brackets 601 are provided at the ends of the measuring rods 73, and laser emitters 732 and paintbrushes 733 are fixedly provided on both sides of the mounting bracket 601, and photosensitive test boards 402 and recording drawing boards 403 are fixedly provided on the inner walls on both sides of the accommodating cavity 401, respectively, the laser emitter 732 is arranged vertically toward the photosensitive test board 402, and the paintbrushes 733 are arranged against the surface of the recording drawing board 403.

[0031] Specifically, by setting the feedback component 7, during the monitoring process, the main body 1 moves to the position to be monitored in the foundation pit through the crawler drive unit 2, and at the same time, the motor 5 drives the pressing plates 72 at both ends to slide linearly outward until the outer support plate 71 gradually approaches the foundation pit and finally rests on the inner wall of the foundation pit, and the soil-breaking tooth edge 711 on the end face of the support plate 71 will drill into the soil layer of the pit wall, so that the support plate 71 and the pit wall are completely in contact, and when the inner wall of the foundation pit gradually deforms, the force exerted by the pit wall on the support plate 71 will be transmitted to the measuring rod 73, so that the measuring rod 73 is generated in the accommodating cavity 401 of the monitoring box 4 The synchronous position changes of the pit wall can be recorded visually and vividly through the traces of the brush 733 on the recording board 403, and the specific deformation process of the pit wall can be recorded. At the same time, the laser emitter 732 will emit laser periodically, and the point changes of the laser signal received by the photosensitive test board 402 before and after the period can be used to analyze and calculate the specific values ​​of the lateral and longitudinal displacements of the pit wall, thereby realizing the automatic monitoring process of the subway foundation pit deformation process. The subtle lateral or longitudinal deformation process of the foundation pit can be accurately fed back by the changes in the laser's position before and after, which effectively improves the monitoring accuracy.

[0032] like Figure 8 As shown, it is worth mentioning that a rectangular coordinate system is established on the photosensitive test board 402. Before and after the foundation pit is deformed, the laser points received on the photosensitive test board 402 will have different coordinates. The displacement difference ΔX between the two coordinates in the horizontal direction can be expressed as the lateral deformation displacement distance of the foundation pit, and the displacement difference ΔY between the two coordinates in the vertical direction can be expressed as the longitudinal deformation displacement distance of the foundation pit, so that the specific deformation process of the foundation pit within a monitoring period can be analyzed.

[0033] In actual operation, the laser emitter 732 emits laser once every 3-5 days. The intensity of the monitoring process can be adjusted by controlling the emission frequency of the laser emitter 732.

[0034] like Figure 5 As shown, sliding rods 712 are provided at the four corners of one end of the support plate 71 close to the pressing plate 72, and extension brackets 723 are provided at the four corners of one end of the pressing plate 72 close to the support plate 71. A movable slider 724 is installed in the extension bracket 723 for sliding up and down. The upper and lower ends of the movable slider 724 are connected to the extension bracket 723 by longitudinal springs 725. The sliding rod 712 slides through the corresponding movable slider 724, and a transverse spring 713 is provided between the movable slider 724 and the support plate 71.

[0035] Specifically, the support plate 71 can be displaced laterally relative to the pressure plate 72 through the horizontal sliding process of the sliding rod 712 in the movable slider 724. At the same time, the support plate 71 can be moved longitudinally relative to the pressure plate 72 through the up and down sliding process of the movable slider 724 in the extension bracket 723. This allows the support plate 71 to have displacement freedom in both the lateral and longitudinal directions relative to the pressure plate 72. When the inner wall of the foundation pit is deformed and a force is applied to the support plate 71, the support plate 71 can make corresponding displacement changes according to the deformation process, thereby timely and effectively feeding back the deformation information of the foundation pit.

[0036] like Figure 3 and Figure 4 As shown, the moving component 6 includes a group of mounting frames 601 arranged relatively to each other, a row of moving auxiliary wheels 602 are rotatably installed inside the mounting frames 601, and slide rails 603 are arranged on the outer walls on both sides of the mounting frames 601. The slide rails 603 are adapted to be slidably installed in the first slide groove 101. Toothed straight plates 604 are fixedly arranged on the inner walls of the mounting frames 601 at both ends, and the two groups of toothed straight plates 604 are arranged symmetrically with respect to the center.

[0037] Furthermore, the output end of the motor 5 is fixedly connected to a driving shaft 501, and a driving gear 502 is fixedly sleeved on the driving shaft 501. The driving gear 502 is simultaneously gear-engaged with two sets of toothed straight plates 604. The bottom end of the driving shaft 501 is fixedly connected to a rotating plate 503, and both ends of the rotating plate 503 are rotationally engaged with one end of the connecting rod 504, and the other end of the connecting rod 504 is rotationally engaged with the corresponding pressure plate 72.

[0038] Furthermore, the driving shaft 501 drives the mounting frames 601 at both ends and the pressing plates 72 at both ends to move synchronously, and the moving directions of the mounting frames 601 and the pressing plates 72 are opposite.

[0039] Specifically, by setting the moving assembly 6, the motor 5 drives the driving gear 502 to rotate through the driving shaft 501, and the driving gear 502 drives the mounting frames 601 at both ends to move toward each other through the tooth groove straight plate 604. At the same time, the driving shaft 501 will synchronously drive the pressing plates 72 at both ends to slide linearly in the opposite direction through the rotating plate 503 and the connecting rod 504. During monitoring, Figure 7 -a, the pressing plate 72 extends outward until the supporting plate 71 abuts against the pit wall, at which time the mounting frame 601 retreats into the top bracket 3. Figure 7 -b, the mounting frame 601 extends outward until the movable auxiliary wheel 602 is against the pit wall, at which time the support plate 71 retracts into the inner cavity of the main body 1, so that the monitoring equipment can be flexibly switched during the monitoring process and the moving process, so as to facilitate the monitoring equipment to effectively monitor different positions of the foundation pit.

[0040] In this embodiment, a display screen is provided on the front end surface of the monitoring box 4, and the photosensitive test board 402 is electrically connected to the display screen. After the photosensitive test board 402 receives the laser signal, it is processed and displayed on the display screen.

[0041] In this embodiment, a socket for maintenance and replacement is provided at the top of the monitoring box 4 corresponding to the position of the photosensitive test board 402 and the recording drawing board 403.

[0042] The working principle of the present invention is as follows: Figure 1-Figure 7As shown, when in use, the main body 1 moves to the position to be monitored in the subway foundation pit through the crawler drive unit 2, the motor 5 drives the driving gear 502 to rotate through the driving shaft 501, and the driving gear 502 drives the mounting frames 601 at both ends to move toward each other through the tooth groove straight plate 604, so that the mounting frames 601 retreat into the top bracket 3, and at the same time, the driving shaft 501 will synchronously drive the pressing plates 72 at both ends to slide in the opposite direction through the rotating plate 503 and the connecting rod 504, until the outer supporting plate 71 gradually approaches the foundation pit and finally rests on the inner wall of the foundation pit, and the earth-breaking tooth edge 711 on the end face of the supporting plate 71 will drill into the soil layer of the pit wall, so that the supporting plate 71 and the pit wall are in contact with each other. Completely fit in contact, when the inner wall of the foundation pit gradually deforms, the force exerted by the pit wall on the support plate 71 will be transmitted to the measuring rod 73, so that the measuring rod 73 will change its position synchronously in the accommodating cavity 401 of the monitoring box 4, and the traces of painting on the recording drawing board 403 by the brush 733 will be able to intuitively and vividly record the specific deformation process of the pit wall. At the same time, the laser emitter 732 will periodically emit lasers, and the point position changes of the laser signal received by the photosensitive test board 402 before and after the cycle can be used to analyze and calculate the specific values ​​of the lateral displacement and longitudinal displacement of the pit wall, thereby realizing the automatic monitoring process of the subway foundation pit deformation process. When it is necessary to change the monitoring position, the mounting frame 601 extends outward until the mobile auxiliary wheel 602 is against the pit wall, and the support plate 71 retreats into the inner cavity of the main body 1, so that the monitoring equipment can move smoothly along the narrow and long foundation pit, so as to facilitate the effective monitoring of different positions of the foundation pit.

[0043] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An automated deformation monitoring device for a subway foundation pit, comprising a main body (1), a crawler drive unit (2) being arranged at the bottom of the main body (1), and a top bracket (3) being fixedly arranged at the upper end of the main body (1), characterized in that: A monitoring box (4) is fixedly arranged at the center of the main body (1), a motor (5) is fixedly arranged at the center of the upper end of the top bracket (3), first slide grooves (101) are arranged on the inner walls on both sides of the main body (1), and a moving component (6) is slidably installed in the first slide grooves (101), and second slide grooves (301) are arranged on the inner walls on both sides of the top bracket (3), and a feedback component (7) is slidably installed in the second slide grooves (301); The feedback assembly (7) comprises a support plate (71), a pressing plate (72) and a measuring rod (73), wherein two ends of the pressing plate (72) are provided with slide seats (721), wherein the slide seats (721) are adapted to be slidably installed in the second slide groove (301), and the pressing plate (72) is symmetrically arranged at two ends of the main body (1), and the support plate (71) is movably arranged on a side of the pressing plate (72) away from the monitoring box (4), and a soil-breaking tooth blade (711) is arranged at one end of the support plate (71) away from the pressing plate (72), and a measuring rod (73) is fixedly arranged at one end of the support plate (71) close to the pressing plate (72), and a clearance slot (711) is provided through the pressing plate (72). 22), the monitoring box (4) is provided with accommodating cavities (401) at both ends, the measuring rods (73) at both ends pass through the clearance slots (722) and extend into the corresponding accommodating cavities (401), the end of the measuring rod (73) is provided with a mounting seat (731), the two sides of the mounting seat (731) are respectively fixedly provided with a laser emitter (732) and a paintbrush (733), the inner walls on both sides of the accommodating cavity (401) are respectively fixedly provided with a photosensitive test board (402) and a recording drawing board (403), the laser emitter (732) is arranged vertically toward the photosensitive test board (402), and the paintbrush (733) is arranged close to the surface of the recording drawing board (403); The moving assembly (6) comprises a group of mounting frames (601) arranged opposite to each other, a row of moving auxiliary wheels (602) being rotatably mounted inside the mounting frames (601), slide rails (603) being arranged on the outer walls on both sides of the mounting frames (601), the slide rails (603) being adapted to be slidably mounted in the first slide groove (101), toothed straight plates (604) being fixedly arranged on the inner walls of the mounting frames (601) at both ends, and the two groups of toothed straight plates (604) being arranged symmetrically with respect to the center; The output end of the motor (5) is fixedly connected to a drive shaft (501), a drive gear (502) is fixedly sleeved on the drive shaft (501), the drive gear (502) is simultaneously gear-engaged with two sets of toothed straight plates (604), the bottom end of the drive shaft (501) is fixedly connected to a rotating plate (503), both ends of the rotating plate (503) are rotationally engaged with one end of a connecting rod (504), and the other end of the connecting rod (504) is rotationally engaged with a corresponding pressing plate (72); The driving shaft (501) drives the mounting frames (601) at both ends and the pressing plates (72) at both ends to move synchronously, and the moving directions of the mounting frames (601) and the pressing plates (72) are opposite.

2. The automatic deformation monitoring device for subway foundation pit according to claim 1 is characterized in that: Sliding rods (712) are provided at four corners of one end of the support plate (71) close to the pressing plate (72); extension brackets (723) are provided at four corners of one end of the pressing plate (72) close to the support plate (71); a movable slider (724) is installed in the extension bracket (723) so as to slide up and down; both upper and lower ends of the movable slider (724) are connected to the extension bracket (723) via longitudinal springs (725); the sliding rod (712) slides through the corresponding movable slider (724); and a transverse spring (713) is provided between the movable slider (724) and the support plate (71).

3. The automatic deformation monitoring device for subway foundation pit according to claim 1 is characterized in that: A display screen is provided on the front end surface of the monitoring box (4), the photosensitive test board (402) is electrically connected to the display screen, and the photosensitive test board (402) receives a laser signal and processes it for display on the display screen.

4. The subway foundation pit automatic deformation monitoring device according to claim 1 is characterized in that: A socket for maintenance and replacement is provided at the top of the monitoring box (4) at a position corresponding to the photosensitive test board (402) and the recording drawing board (403).

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