Deep foundation pit monitoring device

Abstract

The invention provides a deep foundation pit monitoring device which comprises a bottom frame, a vertical frame is vertically and fixedly arranged at the top of one end of the bottom frame, deformation conversion mechanisms are evenly arranged on the vertical frame in the vertical direction, and a deformation quantity collecting mechanism is fixedly arranged on the side, away from the deformation conversion mechanisms, of the vertical frame in the vertical direction; according to the device, the deformation quantity conversion mechanism converts the deformation quantity of the side wall of the foundation pit into the displacement change which can be recognized by the forming variable acquisition mechanism, the deformation conversion mechanisms are uniformly arranged on the vertical frame in the vertical direction, so that displacement monitoring can be carried out on multiple areas with different heights in the vertical direction of the side wall of the foundation pit, and manual intervention can be not needed; all-weather detection of deformation of the side wall of the foundation pit is achieved, monitoring blind areas in the height direction are reduced, and the displacement amount is obtained in time.

Description

Technical Field

[0001] The invention belongs to the technical field of foundation pit construction, and in particular relates to a deep foundation pit monitoring device. Background Art

[0002] During the construction of deep foundation pits, in order to ensure construction quality and safety, it is necessary to monitor the status of the deep foundation pits.

[0003] In order to avoid various problems caused by foundation pit collapse, the deformation and displacement of the side walls of the foundation pit were initially detected using total stations and other equipment at regular intervals to promptly detect the precursors of foundation pit collapse and prompt relevant staff to respond. This monitoring method is highly dependent on manual labor and it is difficult to achieve all-weather monitoring.

[0004] In the prior art, a Chinese invention patent document with authorization announcement number CN113789822B discloses a foundation pit monitoring device, which drives the abutment to move toward the direction close to the support rod when the side wall of the foundation pit displaces inward, and the abutment drives the compression spring to compress, and the pressure detection signal output by the pressure detection component increases. When the pressure detection signal is greater than the reference signal, the warning module alarms, and no human intervention is required, thereby realizing all-weather detection of the side wall of the foundation pit; however, it can only monitor the displacement of the side wall of the foundation pit at a fixed height. For a deep foundation pit, the side wall is relatively high, and the above-mentioned prior art is prone to monitoring blind spots, and it is impossible to monitor the specific displacement. After receiving the alarm signal, it is necessary to go to the site to detect the displacement and determine whether the displacement exceeds the allowable range. The labor cost is high and the displacement cannot be obtained in time.

[0005] Therefore, it is necessary to design a deep foundation pit monitoring device that can realize all-weather detection of foundation pit side wall deformation without human intervention, reduce monitoring blind spots in the height direction, and obtain displacement in time to solve the current technical problems. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a deep foundation pit monitoring device that can realize all-weather detection of foundation pit side wall deformation without human intervention, reduce monitoring blind spots in the height direction, and obtain displacement in a timely manner.

[0007] The technical solution of the present invention is as follows: a deep foundation pit monitoring device comprises a base frame, a vertical frame is fixedly arranged on the top of one end of the base frame, a deformation conversion mechanism is evenly arranged on the vertical frame, and a deformation variable collection mechanism is fixedly arranged on the side of the base frame away from the deformation conversion mechanism in the vertical direction; the deformation conversion mechanism has a support tube, a sliding rod is slidably arranged inside the support tube, an abutment plate is fixedly arranged on one end of the sliding rod, a force measuring assembly is arranged between the end of the sliding rod and the abutment plate, a detection plate is fixedly arranged on the other end of the sliding rod, a fixing flange is fixedly arranged on one end of the support tube, and the fixing flange is fixedly assembled on one side of the base frame; the deformation variable collection mechanism has a lifting seat slidably arranged on one side of the base frame in the vertical direction, and a distance measuring module corresponding to the detection plate is fixedly arranged on one side of the lifting seat.

[0008] A slider is fixedly provided on the lifting seat at one side close to the stand, a track is slidably provided on the slider at the side away from the lifting seat, the track is fixedly provided on one side of the stand, the lifting seat is internally threadedly connected with a lead screw provided on one side of the stand for rotation along a vertical direction, and a servo motor is provided at the top of the lead screw for driving the lead screw to rotate.

[0009] One end of the slide bar close to the abutment plate and one end of the support tube close to the abutment plate are both fixedly provided with spring positioning grooves, and a spring is sleeved on the outer side of the slide bar between the two spring positioning grooves.

[0010] The outer side of the slide rod is provided with at least two slide bars parallel to its axis in a circumferential array, the inner side of the support tube is provided with a guide groove matching the slide bar, and the slide bar is slidably arranged inside the guide groove.

[0011] A limiting ring corresponding to the end of the support tube is fixedly arranged on the outer side of one end of the sliding rod away from the abutment plate.

[0012] Detection point fine-tuning components are evenly arranged on the abutment plate, and the detection point fine-tuning components have fine-tuning studs that are perpendicular to and threadedly connected to the abutment plate, an abutment joint is fixedly arranged on the end of the fine-tuning stud facing away from the sliding rod, an adjusting handwheel is fixedly arranged on the other end of the fine-tuning stud, and a locking nut that abuts against the abutment plate is threadedly connected to the fine-tuning stud.

[0013] The force measuring assembly comprises a rectangular column fixedly arranged at the end of the sliding rod, a force measuring slide is fixedly arranged at the end of the rectangular column away from the sliding rod, a force measuring sleeve is slidingly sleeved on the outer side of the force measuring slide along the axial direction of the sliding rod, and a force sensor is arranged between the force measuring sleeve and the force measuring slide.

[0014] The base frame has a bottom plate vertically fixedly connected to the bottom end of the vertical frame, and horizontal plates are symmetrically arranged on both sides of the bottom plate. The ends of the horizontal plates are vertically threadedly connected with leveling screws. A fixing plate is rotatably arranged at the bottom end of the leveling screw, and a fixing hole is opened on the fixing plate. A handle is fixedly arranged on the top end of the leveling screw.

[0015] Two groups of deformation amount acquisition mechanisms are symmetrically arranged on the stand, and two detection plates respectively matched with the distance measurement modules in the two groups of deformation amount acquisition mechanisms are symmetrically arranged on the end of the slide bar.

[0016] A shield is fixedly arranged on the side of the stand facing away from the deformation conversion mechanism, and an oblique support rod is arranged between the shield and the base frame.

[0017] Beneficial effects of the present invention:

[0018] (1) In the present invention, the deformation conversion mechanism converts the deformation of the foundation pit side wall into a displacement change that can be identified by the deformation acquisition mechanism. The deformation conversion mechanism is evenly arranged on the vertical direction of the stand, which can monitor the displacement of multiple areas at different heights in the vertical direction of the foundation pit side wall. It can realize all-weather detection of the deformation of the foundation pit side wall without manual intervention, reduce the monitoring blind area in the height direction, and obtain the displacement in time;

[0019] (2) The force change detected by the force measuring component is used as a detection signal to control the distance measuring module in the deformation acquisition mechanism to move up and down, and the displacement changes of multiple different deformation conversion mechanisms in the vertical direction are collected, which can reduce the use of distance measuring modules and reduce the cost of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the deep foundation pit monitoring device in the present invention.

[0021] Figure 2 It is a schematic diagram of the partial structure of the deep foundation pit monitoring device in the present invention.

[0022] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0023] Figure 4 This is one of the structural schematic diagrams of the deformation variable collection mechanism in the present invention.

[0024] Figure 5 for Figure 4 A partial enlarged view of point B in the middle.

[0025] Figure 6 This is the second structural schematic diagram of the deformation variable collection mechanism in the present invention.

[0026] Figure 7 for Figure 6 A partial enlarged view of point C in the middle.

[0027] Figure 8 This is the third structural schematic diagram of the deformation variable collection mechanism in the present invention.

[0028] Fig. 9 for Figure 8 Cross-sectional view at DD in the middle.

[0029] Fig.10 for Fig. 9 A partial enlarged view of point E in the middle. DETAILED DESCRIPTION

[0030] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is not intended to be any limitation on the present invention and its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete and to fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limitations.

[0031] The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0032] like Figures 1 to 10 As shown, a deep foundation pit monitoring device comprises a base frame 1, a vertical frame 2 is vertically fixed on the top of one end of the base frame 1, a deformation conversion mechanism 5 is evenly arranged on the vertical frame 2, and a deformation variable acquisition mechanism 6 is fixedly arranged on the side of the base frame away from the deformation conversion mechanism 5 in the vertical direction, wherein the base frame 1 is fixed to the ground, and the vertical frame 2 provides stable support for the deformation conversion mechanism 5 and the deformation variable acquisition mechanism 6, the deformation variable conversion mechanism 5 converts the deformation of the foundation pit side wall into a displacement change that can be identified by the deformation variable acquisition mechanism 6, and the deformation conversion mechanism 5 is evenly arranged on the vertical frame 2 in the vertical direction, which can monitor the displacement of multiple areas at different heights in the vertical direction of the foundation pit side wall, and can realize all-weather detection of the deformation of the foundation pit side wall without human intervention, reduce the monitoring blind area in the height direction, and obtain the displacement in time.

[0033] As a specific implementation of the above-mentioned deformation conversion mechanism 5, Figure 4 and 5 As shown, the deformation conversion mechanism 5 has a support tube 53, a slide rod 54 is slidably provided inside the support tube 53, an abutment plate 51 is fixedly provided at one end of the slide rod 54, a force measuring assembly 57 is provided between the end of the slide rod 54 and the abutment plate 51, a detection plate 55 is fixedly provided at the other end of the slide rod 54, a fixed flange 531 is fixedly provided at one end of the support tube 53, and the fixed flange 531 is fixedly assembled on one side of the stand 2; after the base frame 1 is installed on the ground, the abutment plate 51 abuts against the side wall of the foundation pit, when the side wall of the foundation pit is deformed, the abutment plate 51 and the slide rod 54 are pushed to move, and the movement of the slide rod 54 drives the detection plate 5 to move synchronously, and the displacement change of the detection plate 55 can be identified and collected, and the displacement of the side wall of the foundation pit in the monitoring area can be obtained.

[0034] As a specific implementation of the deformation amount collection mechanism 6, Figure 2 and 3 As shown, the deformation amount acquisition mechanism 6 has a lifting seat 61 slidably arranged on one side of the stand 2 in the vertical direction, and a distance measuring module 63 corresponding to the detection plate 55 is fixedly arranged on one side of the lifting seat 61; after the fixing of the monitoring device is completed, a certain sequence number is installed on the deformation conversion mechanism 5 on one side of the stand 2, each sequence number corresponds to its corresponding position coordinate, and the distance measuring module 63 is controlled to sequentially detect the initial distance of the detection plate 55 in each deformation conversion mechanism 5 and associate the sequence number record; when the side wall of the foundation pit in the monitoring area is deformed and displaced, the abutment plate 51 is pushed to move, and at this time the force measuring component 57 The force change will be monitored, and according to the position coordinates of the deformation conversion mechanism 5 corresponding to the force measuring component 57, the distance measuring module 63 is controlled to move to the coordinate position corresponding to the deformation conversion mechanism 5, and the distance to the detection plate 55 is detected again. By comparing with the initial distance, the foundation pit deformation amount of the secondary monitoring area can be obtained; the force change detected by the force measuring component 57 is used as a detection signal to control the ranging module 63 in the deformation collection mechanism 6 to move up and down, and the displacement changes of multiple different deformation conversion mechanisms 5 in the vertical direction are collected, which can reduce the use of the ranging module 63 and reduce the cost of the device.

[0035] In some embodiments, Figure 2 and 3As shown, a slider 62 is fixedly provided on the side of the lifting seat 61 close to the stand 2, and a track 64 is slidably provided on the side of the slider 62 away from the lifting seat 61, and the track 64 is fixedly provided on one side of the stand 2. The internal thread of the lifting seat 61 is connected with a lead screw 65 which is arranged on one side of the stand 2 and rotates in the vertical direction. A servo motor 66 is provided on the top of the lead screw 65 to drive it to rotate. The servo motor 66 has a high position control accuracy. The servo motor 66 drives the lead screw 65 to rotate, and the lead screw 65 drives the lifting seat 61 to drive the slider 62 to slide along the track 64 through the threaded mechanism. During installation, the distance measuring module 63 and all the detection plates 55 are aligned in turn, and the corresponding position data is recorded. After that, the servo motor 66 can drive the lifting seat 61 to drive the distance measuring module 63 to move to the corresponding position of any detection plate 55 according to the position data.

[0036] In some embodiments, a spring positioning groove 58 is fixedly provided on one end of the slide rod 54 close to the abutment plate 51 and on the other end of the support tube 53 close to the abutment plate 51. A spring 56 is mounted on the outer side of the slide rod 54 between the two spring positioning grooves 58. The spring 56 applies an elastic force to the slide rod 54 to move toward the side wall of the foundation pit, so that the abutment plate 51 remains in close contact with the side wall of the foundation pit. When displacement occurs, the spring 56 is compressed, the elastic force increases, and the detection value of the force measuring component 57 increases.

[0037] In some embodiments, Figure 4 and 5 As shown, the outer side of the slide bar 54 has at least two slide bars 541 parallel to its axis in a circular array, and the inner side of the support tube 53 is provided with a guide groove 532 matching the slide bar 541, and the slide bar 541 is slidably arranged inside the guide groove 532; the slide bar 54 and the support tube 53 are slidably connected through the slide bar 541 and the guide groove 532, so that relative rotation can occur between the slide bar 54 and the support tube 53 to cause the abutment plate 51 to tilt.

[0038] In some embodiments, a limiting ring 542 corresponding to the end of the support tube 53 is fixedly provided on the outer side of the end of the slide rod 54 facing away from the abutment plate 51. The elastic force of the spring 56 is applied to the slide rod 54, and the slide rod 54 has a tendency to move relative to the support tube 53. The limiting ring 542 plays a role in blocking and positioning the slide rod 54.

[0039] In some embodiments, Figure 6 and 7As shown, the abutment plate 51 is evenly provided with detection point fine-tuning components 52, and the detection point fine-tuning components 52 have fine-tuning studs 521 that are perpendicular to and threadedly connected to the abutment plate 51; an abutment joint 522 is fixedly provided on the fine-tuning stud 521 at one end away from the slide rod 54, and an adjusting hand wheel 524 is fixedly provided on the other end of the fine-tuning stud 521; a locking nut 523 that abuts against the abutment plate 51 is threadedly connected on the fine-tuning stud 521; if there are unevenness on the side wall of the foundation pit, the abutment plate 51 may not contact well with the side wall of the foundation pit, and when deformation occurs in the recessed area, the abutment plate 51 may not be pushed to move in time, thereby affecting the accuracy of monitoring; the detection point fine-tuning components 52 can fine-tune the position of the abutment joint 522 by rotating the fine-tuning stud 521 by adjusting the hand wheel 524, and adjust the abutment joint 522 to abut against the side wall of the foundation pit according to the unevenness of the side wall of the foundation pit.

[0040] In some embodiments, Figures 8 to 10 As shown, the force measuring assembly 57 has a rectangular column 571 fixedly arranged at the end of the sliding rod 54, and a force measuring slide 572 is fixedly arranged on the end of the rectangular column 571 away from the sliding rod 54. The outer side of the force measuring slide 572 is provided with a force measuring sleeve 573 along the axial sliding sleeve of the sliding rod 54, and a force sensor 574 is arranged between the force measuring sleeve 573 and the force measuring slide 572. The force generated by the deformation of the foundation pit pushes the abutment plate 51, and the abutment plate 51 drives the force measuring sleeve 573 to slide along the rectangular column 571, and the force measuring slide 572 moves inside the force measuring sleeve 573 to transmit the force generated by the deformation of the foundation pit to the force sensor 574, thereby realizing the recognition of the force.

[0041] In some embodiments, Figure 2 As shown, the base frame 1 has a bottom plate 11 which is vertically fixedly connected to the bottom end of the vertical frame 2, and horizontal plates 12 are symmetrically arranged on both sides of the base plate 11. The ends of the horizontal plates 12 are vertically threadedly connected with leveling screws 14, and the bottom end of the leveling screw 14 is rotatably provided with a fixing plate 13, and a fixing hole 16 is opened on the fixing plate 13. A handle 15 is fixedly arranged on the top of the leveling screw 14. When the ground is uneven, the base frame 1 can be leveled by adjusting the supporting height of the leveling screw 14 to ensure the measurement accuracy; during specific adjustment, the leveling screw 14 is rotated by the handle 15, and the leveling screw 14 drives the horizontal plate 12 to move up and down relative to the fixing plate 13 to achieve adjustment; expansion bolts corresponding to the fixing holes 16 can be arranged on the ground to fix the fixing plate 13 to the ground, thereby ensuring the stability of the base frame 1 and ensuring the monitoring accuracy.

[0042] In some embodiments, two groups of deformation variable collection mechanisms 6 are symmetrically arranged on the stand 2, and two detection plates 55 are symmetrically arranged at the end of the sliding rod 54, which are respectively matched with the ranging modules 63 in the two groups of deformation variable collection mechanisms 6. The two groups of deformation variable collection mechanisms 6 can collect the deformation variables of the two deformation conversion mechanisms 5 at the same time, thereby improving the deformation collection efficiency.

[0043] In some embodiments, a protective cover 3 is fixedly provided on the side of the stand 2 facing away from the deformation conversion mechanism 5. The ranging module 63 can specifically adopt a laser ranging sensor. The protective cover 3 can prevent external factors from affecting the ranging module 63. A diagonal support rod 4 is provided between the protective cover 3 and the base frame 1, and the diagonal support rod 4 is used to improve the stability of the stand 2.

[0044] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0045] The above-mentioned embodiments only express some implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A deep foundation pit monitoring device, characterized in that: It comprises a base frame, a stand frame is vertically fixedly arranged on the top of one end of the base frame, a deformation conversion mechanism is evenly arranged on the stand frame along the vertical direction, and a deformation amount collection mechanism is fixedly arranged on the side of the stand frame away from the deformation conversion mechanism along the vertical direction; The deformation conversion mechanism comprises a support tube, a slide rod is slidably arranged inside the support tube, an abutment plate is fixedly arranged at one end of the slide rod, a force measuring assembly is arranged between the end of the slide rod and the abutment plate, a detection plate is fixedly arranged at the other end of the slide rod, a fixing flange is fixedly arranged at one end of the support tube, and the fixing flange is fixedly assembled on one side of the stand; The deformation amount collecting mechanism comprises a lifting seat which is slidably arranged on one side of the stand in a vertical direction, and a distance measuring module corresponding to the detection plate is fixedly arranged on one side of the lifting seat.

2. The deep foundation pit monitoring device according to claim 1, characterized in that: A slider is fixedly provided on the lifting seat at one side close to the stand, a track is slidably provided on the slider at the side away from the lifting seat, the track is fixedly provided on one side of the stand, the lifting seat is internally threadedly connected with a lead screw provided on one side of the stand for rotation along a vertical direction, and a servo motor is provided at the top of the lead screw for driving the lead screw to rotate.

3. The deep foundation pit monitoring device according to claim 1 is characterized in that: One end of the slide bar close to the abutment plate and one end of the support tube close to the abutment plate are both fixedly provided with spring positioning grooves, and a spring is sleeved on the outer side of the slide bar between the two spring positioning grooves.

4. The deep foundation pit monitoring device according to claim 3 is characterized in that: The outer side of the slide rod is provided with at least two slide bars parallel to its axis in a circumferential array, the inner side of the support tube is provided with a guide groove matching the slide bar, and the slide bar is slidably arranged inside the guide groove.

5. The deep foundation pit monitoring device according to claim 3 is characterized in that: A limiting ring corresponding to the end of the support tube is fixedly arranged on the outer side of one end of the sliding rod away from the abutment plate.

6. The deep foundation pit monitoring device according to claim 1, characterized in that: Detection point fine-tuning components are evenly arranged on the abutment plate, and the detection point fine-tuning components have fine-tuning studs that are perpendicular to and threadedly connected to the abutment plate, an abutment joint is fixedly arranged on the end of the fine-tuning stud facing away from the sliding rod, an adjusting handwheel is fixedly arranged on the other end of the fine-tuning stud, and a locking nut that abuts against the abutment plate is threadedly connected to the fine-tuning stud.

7. The deep foundation pit monitoring device according to claim 1, characterized in that: The force measuring assembly comprises a rectangular column fixedly arranged at the end of the sliding rod, a force measuring slide is fixedly arranged at the end of the rectangular column away from the sliding rod, a force measuring sleeve is slidingly sleeved on the outer side of the force measuring slide along the axial direction of the sliding rod, and a force sensor is arranged between the force measuring sleeve and the force measuring slide.

8. The deep foundation pit monitoring device according to claim 1, characterized in that: The base frame has a bottom plate vertically fixedly connected to the bottom end of the vertical frame, and horizontal plates are symmetrically arranged on both sides of the bottom plate. The ends of the horizontal plates are vertically threadedly connected with leveling screws. A fixing plate is rotatably arranged at the bottom end of the leveling screw, and a fixing hole is opened on the fixing plate. A handle is fixedly arranged on the top end of the leveling screw.

9. The deep foundation pit monitoring device according to claim 1, characterized in that: Two groups of deformation amount acquisition mechanisms are symmetrically arranged on the stand, and two detection plates respectively matched with the distance measurement modules in the two groups of deformation amount acquisition mechanisms are symmetrically arranged on the end of the slide bar.

10. The deep foundation pit monitoring device according to claim 1, characterized in that: A shield is fixedly arranged on the side of the stand facing away from the deformation conversion mechanism, and an oblique support rod is arranged between the shield and the base frame.

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