CN214272163U

CN214272163U - Foundation pit displacement automatic monitoring device

Info

Publication number: CN214272163U
Application number: CN202023224542.7U
Authority: CN
Inventors: 付瑞祯; 吴新凯; 刘宝建; 何林; 鲁文东
Original assignee: Chemical Industry First Survey And Design Institute Co ltd
Current assignee: Chemical Industry First Survey And Design Institute Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-09-24
Anticipated expiration: 2030-12-28

Abstract

The application relates to an automatic foundation pit displacement monitoring device, which relates to the technical field of foundation pit monitoring and comprises a detection plate fixed on a foundation pit wall body and a fixed plate fixed on the ground of a foundation pit, wherein a conductive probe is fixedly arranged on the side wall of the detection plate far away from the wall body, the top end of the fixed plate is connected with a supporting plate in a sliding manner, the top end of the supporting plate is fixedly provided with a monitoring box, the side wall of the monitoring box near the probe is provided with a avoidance hole for the probe to extend into, the side wall of the monitoring box far away from the probe is made of transparent material, the bottom of the side wall of the monitoring box is provided with an adjusting hole, the adjusting hole is rotationally connected with an adjusting screw rod, the outer wall of the adjusting hole positioned in the monitoring box is connected with a conductive monitoring plate in a threaded manner, the top part between the two side walls of the monitoring box is provided with a sliding rod, the top part of the monitoring plate is provided with an alarm hole for the probe to extend into, the probe and the monitoring plate are both connected with a lead forming a closed loop with an alarm, this application has the effect that improves monitoring devices calibration efficiency.

Description

Foundation pit displacement automatic monitoring device

Technical Field

The application relates to the technical field of foundation pit monitoring, in particular to an automatic foundation pit displacement monitoring device.

Background

The foundation pit is an excavated soil pit at a foundation design position according to the base elevation and the base plane size, the excavated soil pit needs to be reinforced, and the foundation pit needs to be monitored after the foundation pit is reinforced; the foundation pit monitoring is an important link in foundation pit engineering construction, and is mainly used for monitoring parameters such as deformation and bearing capacity and feeding back real-time data so as to ensure the safety of engineering; the foundation pit displacement monitoring belongs to one of deformation monitoring, and is used for monitoring the displacement between the bottom surface of a foundation pit and a foundation pit wall.

The existing Chinese patent with reference to the publication number CN207512713U discloses a foundation pit displacement automatic monitoring device, which comprises a base, be equipped with the bracing piece on the base, be connected with the third telescopic link on the lateral wall of bracing piece, the one end that the bracing piece was kept away from to the third telescopic link is connected with the contact plate, be connected with the backup pad on the lateral wall of bracing piece, and the backup pad is located the top of third telescopic link, the upper end of backup pad is equipped with the control box, be connected with control button on the one end inner wall that the control box is close to the bracing piece, the bottom level of control box is equipped with the spout, be equipped with the slider in the spout, the upper end of slider is connected with the sliding plate, be connected with a plurality of elastic components on the one end lateral wall that control button was kept away from to the sliding plate, the one.

In view of the above-mentioned related technologies, the inventor believes that there is a defect that calibration and adjustment efficiency of a monitoring device is low when the monitoring device is used, and thus a large alarm error exists in the monitoring device.

SUMMERY OF THE UTILITY MODEL

Efficiency is lower in order to improve monitoring devices calibration regulation, and then makes monitoring devices have the defect of great alarm error, this application provides a foundation ditch displacement automatic monitoring device.

The application provides a foundation ditch displacement automatic monitoring device adopts following technical scheme:

an automatic foundation pit displacement monitoring device comprises a detection plate fixed on a foundation pit wall body and a fixed plate fixed on the ground of the foundation pit, wherein a conductive probe is fixedly arranged on the side wall of the detection plate far away from the wall body, the top end of the fixed plate is connected with a supporting plate in a sliding manner along the direction close to the foundation pit wall body, the top end of the supporting plate is fixedly provided with a monitoring box, the side wall of the monitoring box close to the probe is provided with a avoidance hole for the probe to extend into, the side wall of the monitoring box far away from the probe is made of transparent material, the bottom of the side wall of the monitoring box parallel to the length direction of the probe is provided with an adjusting hole, the adjusting hole is rotatably connected with an adjusting screw rod, the outer wall of the adjusting hole positioned in the monitoring box is connected with a conductive monitoring plate through a thread, the top of the monitoring box parallel to the length direction of the probe is provided with a sliding rod, the top of the monitoring plate is connected with the sliding rod in a sliding manner, the middle part of the monitoring plate is provided with an alarm hole for the probe to extend into, the probe and the monitoring board are both connected with a lead which forms a closed loop with the alarm.

Through adopting the above-mentioned technical scheme, carry out foundation ditch displacement monitoring time measuring, earlier with the part at the near foundation ditch ground of wall body of detecting board fixed mounting, fix the monitoring board in the position that foundation ditch ground is close to the detecting board again, remove the backup pad, make the probe loop through dodge hole and warning hole, rotate adjusting screw, make the monitoring board remove, and then make the probe be located the position at warning hole center, when the foundation ditch produced the displacement, the probe carries out and removes for the monitoring board, when probe and warning downthehole wall butt, the alarm forms closed loop, and the suggestion of reporting to the police, the effectual stability that improves foundation ditch displacement monitoring of monitoring shell, adjusting screw has effectually improved the efficiency that monitoring devices calibrated the regulation.

Optionally, a sliding groove is formed in the top of the fixing plate, a sliding plate is fixedly arranged at the bottom end of the supporting plate, the sliding plate slides along the direction close to the wall body of the foundation pit and the sliding groove in a butting mode, a transverse moving plate is fixedly arranged at the position, far away from the detection plate, of the top end of the fixing plate, a transverse moving screw is connected with the transverse moving screw in a threaded mode, the length direction of the transverse moving screw is parallel to the sliding direction of the sliding plate, a rotating groove for the transverse moving screw to extend into is formed in the side wall, close to the transverse moving screw, of the supporting plate, the rotating groove is far away from the side wall with the opening and is provided with an anti-falling groove, one end, close to the anti-falling groove, of the transverse moving screw is fixedly provided with an anti-falling plate in a butting mode with the inner wall of the anti-falling groove, and one end, close to the same side wall of the supporting plate, of the anti-falling groove and the rotating groove is an opening setting.

Through adopting above-mentioned technical scheme, the fixed plate is fixed the back at corresponding position, rotates the sideslip screw rod, and the sideslip screw rod moves the backup pad through putting the stripper plate and removes, and the effectual stability that improves the backup pad and slide of slide plate, backup pad drive monitoring box remove, and then make the probe stretch into in proper order and dodge hole and warning downthehole, the effectual efficiency that improves monitoring devices calibration and regulation.

Optionally, the monitoring plate is kept away from the lateral wall of probe and is set firmly the aiming frame, and the one end that the probe was kept away from to the aiming frame sets firmly transparent collimation board, and collimation board central axis and warning hole central axis collineation are carved with the crossing sight in its central department.

Through adopting above-mentioned technical scheme, the probe stretches into warning downthehole back, observes the position of probe through monitoring case transparent lateral wall, carries out the in-process of adjusting through the position of adjusting screw monitoring board, and when the central point of probe and the staggered point of sight align, the central point that the probe is located warning hole puts, the effectual efficiency that improves monitoring devices position calibration.

Optionally, the lateral wall that the detecting plate is close to the monitoring case has seted up the lift groove, and the lift inslot slides along the direction that is close to ground and is connected with the detecting plate, detecting plate and probe fixed connection, lift inslot internal rotation are connected with the lifting screw, lifting screw and lifter plate threaded connection, and lifting screw circumference lateral wall has set firmly first crown plate and second crown plate, first crown plate and lift inslot roof butt, second crown plate and detecting plate top butt.

Through adopting above-mentioned technical scheme, rotate the lifting screw and adjust the position height of probe, further improved the efficiency of probe position control, still improved the efficiency of monitoring devices calibration.

Optionally, the fixed plate is connected with the locating plate near the lateral wall of wall body rotation, and when the locating plate was located the position on perpendicular to fixed plate top and with probe bottom butt, the probe was in same horizontal plane with warning hole the central axis.

Through adopting above-mentioned technical scheme, rotate the locating plate, when the probe was kept away from self with the locating plate and is rotated the one end butt of junction, probe and warning hole center were in same horizontal plane, the effectual efficiency that improves probe position control, and then provide the efficiency of case monitoring devices calibration.

Optionally, the probe is a telescopic rod capable of stretching.

By adopting the technical scheme, when the alarm sensitivity of the monitoring device is adjusted, the probe is stretched or contracted, so that the parts of the probe with different outer diameters are positioned in the alarm hole, and then different alarm trigger values of the monitoring device are adjusted, and the adjusting efficiency of the monitoring device is improved.

Optionally, the lateral wall that the monitoring case is close to the probe card sets firmly the protection bag of folding placing, and the one end that the monitoring case was kept away from to the protection bag has set firmly and has had elastic receipts restraint rope, and the lateral wall that the probe card is close to the monitoring case has set firmly the guard ring board including surrounding the lifting groove, and guard ring board circumference outer wall is seted up and is supplied to receive the restraint rope and stretch the back and be located the guard ring groove wherein, and the protection bag is waterproof material, and length supplies to receive the restraint rope and is located the guard ring inslot.

Through adopting above-mentioned technical scheme, the position control of monitoring board is accomplished the back, removes to receive and restraints the rope, makes to receive and restraints the rope and be located the protection annular, and the protection bag is stretched out and is opened and surround the protection to the probe, and the effectual influence that external factors such as rainwater caused to the probe that has reduced has improved monitoring devices monitoring accuracy.

Optionally, the lateral wall that the monitoring case is close to the detecting plate sets firmly and places the crown plate including will dodging the hole and surround, places the crown plate circumference outer wall and offers and supplies to receive and restraint the annular of placing including placing after the rope extends.

Through adopting above-mentioned technical scheme, when the monitoring case was idle, place the effectual space of placing for receiving the rope that provides of crown plate, place the annular and improved the stability of receiving the rope and placing in receiving the groove.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the monitoring device is calibrated, the positioning plate is rotated, the lifting screw rod is rotated again to enable the probe to be abutted against the top end of the positioning plate, the transverse moving screw rod is rotated again to enable the supporting plate to drive the monitoring box to move, the probe sequentially passes through the avoiding hole and the alarming hole, and the adjusting screw rod is rotated again to enable the probe to be located in the middle of the alarming hole, so that the calibration and adjustment efficiency of the monitoring device is effectively improved;

2. when the position of the monitoring plate is adjusted through the adjusting screw rod, the inside of the monitoring box is observed through the transparent side wall of the monitoring box, and when an aiming line on the aiming plate is aligned with the central point of the probe, the calibration and adjustment of the monitoring device are completed, so that the calibration and adjustment efficiency and accuracy of the monitoring device are improved;

3. after the monitoring devices are calibrated, the binding ropes are taken out from the ring grooves and placed in the protective ring grooves, the positions of the protective bags after being stretched are fixed through the binding ropes, the probability that the probes are affected by external influences such as rain erosion is effectively reduced for the protective bags, and the monitoring accuracy of the monitoring devices is effectively improved.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present application;

FIG. 2 is an exploded view, partially in section, showing the probe assembly;

FIG. 3 is an enlarged view of portion A of FIG. 2 showing the shield assembly;

fig. 4 is a partial schematic view showing a state where the probe is wrapped by the protective bag.

In the figure, 1, a detection plate; 11. a lifting groove; 12. steel nails; 13. a guard ring plate; 131. a guard ring groove; 2. a fixing plate; 21. a sliding groove; 22. a support plate; 221. a slide plate; 222. a rotating groove; 223. a drop-proof groove; 23. positioning a groove; 24. positioning a plate; 25. a baffle plate; 3. a monitoring box; 31. adjusting the screw rod; 311. abutting against the ring plate; 32. a slide bar; 33. avoiding holes; 34. placing a ring plate; 341. placing a ring groove; 4. a detection component; 41. a probe; 42. a monitoring plate; 421. an alarm hole; 5. a targeting assembly; 51. a collimation plate; 511. a line of sight; 52. a sighting frame; 6. a lifting assembly; 61. a lifting screw; 611. a first ring plate; 612. a second ring plate; 62. a lifting plate; 7. a traversing assembly; 71. transversely moving the plate; 72. traversing the screw rod; 721. an anti-drop plate; 8. a guard assembly; 81. a protective bag; 82. and (5) a rope is collected.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses foundation ditch displacement automatic monitoring device.

Referring to fig. 1, the automatic foundation pit displacement monitoring device comprises a fixing plate 2 arranged horizontally and a detection plate 1 arranged vertically, steel nails 12 penetrate through four corners of the side wall of the detection plate 1, the steel nails 12 fix the detection plate 1 at a position, close to the bottom end of a foundation pit, of a foundation pit wall, the steel nails 12 penetrate through four corners of the upper surface of the fixing plate 2 and fix the fixing plate 2 at the bottom end of the foundation pit, and the side wall, close to the detection plate 1, of the fixing plate 2 is parallel to the adjacent foundation pit wall; and a detection assembly 4 for monitoring the displacement between the side wall of the foundation pit and the bottom of the foundation pit is arranged between the fixing plate 2 and the detection plate 1.

Carry out displacement monitoring time to the foundation ditch, fix fixed plate 2 and detection board 1 on corresponding position through steel nail 12, rethread detection subassembly 4 monitors the foundation ditch displacement, has improved foundation ditch displacement monitoring's stability.

Referring to fig. 1 and 2, a sliding groove 21 is formed in the middle of the upper surface of the fixed plate 2, a sliding plate 221 is abutted and slid in the sliding groove 21 in a direction perpendicular to the side wall of the adjacent foundation pit, a vertically arranged support plate 22 is fixedly arranged at the top end of the sliding plate 221, and a traversing assembly 7 for adjusting the position of the support plate 22 is arranged between the support plate 22 and the fixed plate 2; the detection assembly 4 comprises a probe 41 and a monitoring plate 42, the probe 41 is a conductive metal telescopic rod, the end with the larger outer diameter of the probe 41 is positioned at the middle position of the side wall of the detection plate 1 close to the support plate 22, the telescopic direction is perpendicular to the connection surface, and a lifting assembly 6 for adjusting the height of the probe 41 is arranged between the probe 41 and the detection plate 1.

The top of the supporting plate 22 is fixedly provided with a monitoring box 3, a middle position of a side wall of the monitoring box 3 close to the detection plate 1 is provided with an avoiding hole 33 for the probe 41 to go deep, the bottom of an inner side wall of the monitoring box 3 parallel to the stretching direction of the probe 41 is rotatably connected with an adjusting screw 31, two ends of the adjusting screw 31 extend out of the monitoring box 3 and are fixedly provided with abutting ring plates 311, the abutting ring plates 311 are abutted against the outer side wall of the monitoring box 3, the top of the inner side wall of the monitoring box 3 parallel to the stretching direction of the probe 41 is rotatably connected with a sliding rod 32, the sliding rod 32 is positioned right above the adjusting screw 31, and the rotating axis is perpendicular to the stretching direction of the probe 41; monitoring board 42 bottom and adjusting screw 31 threaded connection, monitoring board 42 top is rotated with slide bar 32 and is connected, and monitoring board 42 has just seted up warning hole 421 to probe 41's lateral wall intermediate position, and monitoring board 42 is the electrically conductive metal sheet material, and monitoring board 42 and probe 41 all constitute closed circuit's wire with the alarm after with the butt and be connected, and monitoring board 42 is equipped with and carries out the subassembly 5 that aims of calibration to probe 41 position.

After the fixing plate 2 and the detection plate 1 are fixed, the position of the probe 41 is adjusted through the lifting assembly 6, the position of the monitoring plate 42 is adjusted through the transverse moving assembly 7, the sliding plate 221 effectively improves the moving stability of the supporting plate 22, after the probe 41 sequentially penetrates into the avoiding hole 33 and the alarm hole 421, the position of the probe 41 is calibrated and observed through the aiming assembly 5, the adjusting screw 31 is rotated to adjust the position of the monitoring plate 42, the probe 41 is located at the center of the alarm hole 421, and the calibration and adjustment efficiency of the monitoring device is improved; when the side wall of the foundation pit and the bottom of the foundation pit generate relative displacement, the probe 41 generates displacement relative to the monitoring plate 42, a closed loop is formed when the probe 41 is in contact with the inner wall of the alarm hole 421, and the alarm gives an alarm indication, so that the monitoring and alarming functions are realized; the flexible design of probe 41 makes probe 41 can adjust the external diameter of the part of stretching into warning hole 421, and then adjusts the monitoring alarm value, has improved monitoring devices alarm adjustment's efficiency.

Referring to fig. 2, aiming assembly 5 includes aiming frame 52 and collimation board 51, aiming frame 52 sets firmly on the monitoring board 42 keeps away from the lateral wall of probe 41, and surround warning hole 421, aiming board 51 sets firmly the one end of keeping away from monitoring board 42 at aiming frame 52, the lateral wall that monitoring board 42 was kept away from to aiming board 51 is carved with two crisscross hairline 511, one of them hairline 511 horizontal setting, another vertical setting, and the intersection is located dodge hole 33 simultaneously, on the central axis of warning hole 421, aiming board 51 is the transparent plastic board material, the lateral wall that monitoring box 3 kept away from probe 41 is the transparent plastic board material.

When the position of the probe 41 is calibrated, the inside of the monitoring box 3 is observed through the transparent side wall of the monitoring box 3, and when the center position of the probe 41 is aligned with the intersection point of the aiming line 511, the probe 41 is positioned at the center position of the alarm hole 421, so that the efficiency of calibrating and adjusting the monitoring device is effectively improved.

Referring to fig. 1 and 2, the traverse assembly 7 includes a traverse plate 71 and a traverse screw 72, the traverse plate 71 is vertically and fixedly disposed at a position far away from the detection plate 1 on the upper surface of the fixing plate 2, the traverse screw 72 is horizontally disposed and screwed on a side wall of the traverse plate 71 perpendicular to the sliding direction of the support plate 22, a rotation groove 222 for the traverse screw 72 to extend into is disposed on a side wall of the support plate 22 close to the traverse plate 71, a separation-preventing groove 223 is disposed on a portion of an inner wall of the rotation groove 222 far away from the traverse plate 71, a separation-preventing plate 721 abutting against and sliding against an inner wall of the separation-preventing groove 223 is fixedly disposed at one end of the traverse screw 72 far away from the traverse plate 71, and one ends of the separation-preventing groove 223 and the rotation groove 222 close to the same side wall of the support plate 22 parallel to the sliding direction of the support plate are both open.

Lifting unit 6 includes lifting screw 61 and lifter plate 62, the lateral wall intermediate position that detecting plate 1 is close to monitoring box 3 has seted up the lift groove 11 that supplies including lifter plate 62 to slide along vertical direction butt, lifting screw 61 is stretched into in lift groove 11 by detecting plate 1 top, and rotate with detecting plate 1 and be connected, lifting screw 61 and lifter plate 62 threaded connection, the one end and the lifter plate 62 fixed connection of monitoring box 3 are kept away from to probe 41, lifting screw 61 circumference lateral wall has set firmly first crown plate 611 and second crown plate 612 respectively, second crown plate 612 top and 11 inner wall butts in lift groove, first crown plate 611 bottom and 1 top butt of detecting plate.

Locating slot 23 has been seted up to the position that the 2 upper surfaces of fixed plate are close to detecting plate 1, the direction of sliding of length direction perpendicular to backup pad 22 of locating slot 23, locating slot 23 is just being connected with locating plate 24 to probe 41's position rotation, locating plate 24's axis of rotation is on a parallel with the direction of sliding of locating

backup pad

22, 2 upper surfaces of fixed plate have set firmly the baffle 25 of vertical setting, when locating

plate

24 and 25 lateral wall butts of baffle, locating plate 24 is in vertical state, the circular arc groove has been seted up to locating plate 24's upper surface, the circular arc groove of this embodiment is the quarter circular arc, and closely laminate with probe 41 bottom when locating plate 24 is in vertical state, when probe 41 laminates with 24 circular arc groove of locating plate, probe 41 central point and warning hole 421 central point are in same horizontal plane.

When the monitoring device is calibrated, the positioning plate 24 is firstly rotated to enable the positioning plate 24 to be abutted against the baffle 25, then the lifting screw 61 is rotated to enable the lifting plate 62 to drive the probe 41 to slide to the position abutted against the arc groove of the positioning plate 24, the position of the probe 41 is effectively adjusted, the central point of the probe 41 and the central point of the alarm hole 421 are in the same horizontal plane, and the stability of the position of the lifting screw 61 is effectively improved by the first annular plate 611 and the second annular plate 612; the traverse screw 72 is rotated, the support plate 22 slides through the traverse screw 72, the monitoring box 3 is moved to the position where the probe 41 is located in the alarm groove, the sliding stability of the support plate 22 is effectively improved through the anti-falling plate 721, the openings on the same side of the rotation groove 222 and the anti-falling groove 223 are arranged, the anti-falling plate 721 and the traverse screw 72 are convenient to install, the position of the monitoring plate 42 is calibrated and adjusted, and the calibration and adjustment efficiency of the monitoring device is effectively improved.

Referring to fig. 2 and 3, monitoring box 3 still is equipped with the protective assembly 8 that protects probe 41, protective assembly 8 includes waterproof protecting bag 81 and has elastic receipts and restraints rope 82, protecting bag 81 is the waterproof bag material of plastics, it is the elastic cord material to receive and restraints rope 82, the one end of protecting bag 81 and monitoring box 3 are close to the marginal position fixed connection of the lateral wall of detecting plate 1, monitoring box 3 has set firmly annular ring board 34 of placing just to the lateral wall of detecting plate 1, place ring board 34 and will dodge including hole 33 surrounds, place ring board 34 circumference outer wall and seted up and place annular 341, when receiving the band and placing annular 341 inner wall butt, protecting bag 81 is fold condition.

With reference to fig. 2 and 4, the side wall of the detection plate 1 close to the monitoring box 3 is fixedly provided with a protection ring plate 13, the circumferential outer wall of the protection ring plate 13 is provided with a protection ring groove 131, the protection ring plate 13 surrounds the lifting groove 11, and when the contraction rope 82 abuts against the inner wall of the protection ring groove 131, the protection bag 81 extends and wraps the probe 41.

After the monitoring device finishes adjusting, the tightening belt is taken out of the placing ring groove 341 and sleeved in the protective ring groove 131, the protective bag 81 is stretched and the probe 41 is protected, so that the influence of external factors such as wind, rain and the like on the probe 41 is effectively reduced, and the accuracy of monitoring and alarming of the monitoring device is further improved.

The implementation principle of the foundation pit displacement automatic monitoring device in the embodiment of the application is as follows: when the monitoring device is installed and the installed monitoring device is calibrated, the detection plate 1 and the fixing plate 2 are fixed to corresponding positions through the steel nails 12, the positioning plate 24 is rotated to enable the positioning plate 24 to be abutted against the baffle 25, the lifting screw 61 is rotated to enable the probe 41 to be abutted against the arc groove of the positioning plate 24, the position adjustment of the probe 41 is completed, after the positioning plate 24 is reset, the transverse moving screw 72 is rotated and the adjusting screw 31 is rotated simultaneously to enable the monitoring box 3 to move, enable the probe 41 to be located in the avoiding hole 33 and the alarm hole 421 simultaneously, the adjusting screw 31 is rotated again to enable the intersection point of the aiming line 511 to be aligned with the central point of the probe 41, the calibration of the monitoring device is completed, the efficiency of the calibration adjustment of the monitoring device is improved, the beam collecting rope 82 is sleeved in the protective ring groove 131, the protective bag 81 surrounds the probe 41, and the accuracy of the monitoring alarm of the probe 41 is improved.

When foundation ditch lateral wall and bottom produced relative displacement, probe 41 produced the displacement for warning hole 421, when probe 41 and warning hole 421 inner wall butt, made the circuit closure that the intercommunication has the alarm, and then reported to the police and indicate, effectual warning suggestion to foundation ditch displacement deformation.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a foundation ditch displacement automatic monitoring device which characterized in that: the device comprises a detection plate (1) fixed on a foundation pit wall and a fixed plate (2) fixed on the ground of the foundation pit, wherein a conductive probe (41) is fixedly arranged on the side wall of the detection plate (1) far away from the wall, a supporting plate (22) is connected to the top end of the fixed plate (2) in a sliding manner along the direction close to the foundation pit wall, a monitoring box (3) is fixedly arranged at the top end of the supporting plate (22), a avoiding hole (33) for the probe (41) to extend into is formed in the side wall of the monitoring box (3) close to the probe (41), the side wall of the monitoring box (3) far away from the probe (41) is made of a transparent material, adjusting holes are formed in the bottom of the side wall of the monitoring box (3) parallel to the length direction of the probe (41), an adjusting screw rod (31) is rotatably connected in the adjusting holes, a conductive monitoring plate (42) is connected to the outer wall of the adjusting holes in the monitoring box (3) in a threaded manner, and a sliding rod (32) is arranged at the top part between the two side walls of the monitoring box (3) parallel to the length direction of the probe (41), the top of the monitoring plate (42) is connected with the sliding rod (32) in a sliding manner, the middle part of the monitoring plate (42) is provided with an alarm hole (421) for the probe (41) to extend into, and the probe (41) and the monitoring plate (42) are both connected with a wire which is connected with the alarm in a closed loop after being abutted.

2. The automatic foundation pit displacement monitoring device according to claim 1, wherein: the anti-slip groove is characterized in that a slip groove (21) is formed in the top of the fixing plate (2), a slip plate (221) is fixedly arranged at the bottom end of the supporting plate (22), the slip plate (221) slides in a butting mode with the slip groove (21) along the direction close to a foundation pit wall body, a traverse plate (71) is fixedly arranged at the position, far away from the detection plate (1), of the top end of the fixing plate (2), a traverse screw (72) is in threaded connection with the traverse screw (71), the length direction of the traverse screw (72) is parallel to the sliding direction of the slip plate (221), a rotating groove (222) for the traverse screw (72) to stretch into is formed in the side wall, close to the traverse screw (72), of the supporting plate (22), an anti-slip groove (223) is formed in the side wall far away from an opening of the rotating groove (222), an anti-slip plate (721) in a butting mode with the inner wall of the anti-slip groove (223) is fixedly arranged at one end, close to the same side wall of the supporting plate (22), of the anti-slip groove (223) and the rotating groove (222), and the opening are formed in the same end.

3. The automatic foundation pit displacement monitoring device according to claim 1, wherein: the side wall of the monitoring plate (42) far away from the probe (41) is fixedly provided with an aiming frame (52), one end of the aiming frame (52) far away from the probe (41) is fixedly provided with a transparent aiming plate (51), the central axis of the aiming plate (51) is collinear with the central axis of the alarm hole (421), and the aiming line (511) intersected at the center of the aiming plate (51) is carved.

4. The automatic foundation pit displacement monitoring device according to claim 1, wherein: detecting plate (1) is close to the lateral wall of monitoring case (3) and has seted up lift groove (11), it is connected with detecting plate (1) to slide along the direction that is close to ground in lift groove (11), detecting plate (1) and probe (41) fixed connection, lift groove (11) internal rotation is connected with lifting screw (61), lifting screw (61) and lifter plate (62) threaded connection, lifting screw (61) circumference lateral wall has set firmly first crown plate (611) and second crown plate (612), roof butt in first crown plate (611) and lift groove (11), second crown plate (612) and detecting plate (1) top butt.

5. The automatic foundation pit displacement monitoring device according to claim 4, wherein: the side wall that fixed plate (2) are close to the wall body rotates and is connected with locating plate (24), and when locating plate (24) were located the position on perpendicular to fixed plate (2) top and with probe (41) bottom butt, probe (41) were in same horizontal plane with warning hole (421) the central axis.

6. The automatic foundation pit displacement monitoring device according to claim 1, wherein: the probe (41) is a telescopic rod capable of stretching.

7. The automatic foundation pit displacement monitoring device according to claim 1, wherein: the lateral wall that monitoring case (3) are close to detecting board (1) sets firmly protection bag (81) of folding placing, the one end that monitoring case (3) were kept away from in protection bag (81) has set firmly elastic receipts and restraints rope (82), lateral wall that detecting board (1) are close to monitoring case (3) sets firmly protection ring board (13) including encircleing lifting groove (11), protection ring board (13) circumference outer wall is seted up and is supplied to receive and restraints rope (82) tensile back and be located protection annular (131) wherein, protection bag (81) are waterproof material, and length supplies to receive and restraints rope (82) and be located protection annular (131).

8. The automatic foundation pit displacement monitoring device according to claim 7, wherein: the lateral wall that monitoring case (3) are close to detecting plate (1) sets firmly and places crown plate (34) including avoiding hole (33) to surround, places crown plate (34) circumference outer wall and offers and supplies to receive and place annular (341) of placing including behind binding rope (82) the extension.