Deformation monitoring device for underwater steel cofferdam wall surface

Abstract

The invention provides an underwater steel cofferdam wall surface deformation monitoring device, and relates to the technical field of monitoring devices.The underwater steel cofferdam wall surface deformation monitoring device comprises two sets of fixing frames, fixing plates are installed on the side faces of the two sets of fixing frames, a transverse plate assembly is arranged between the two sets of fixing plates, and the transverse plate assembly comprises multiple sets of splicing plates; connecting rods are installed at the bottoms of the adjacent splicing plates, moving grooves are formed in the back faces of the splicing plates, middle plates are fixed to the middles of the moving grooves, pull ropes are fixed to the top of one side and the bottom of the other side of each middle plate, and corresponding detection long plates are installed according to the length of the wall face through the splicing plates and the fixing frame and make contact with the wall face. When the wall surface deforms, the splicing plate at the corresponding position is extruded to move, so that the splicing plate and the splicing plates on the two sides are staggered, the transverse distance of the dislocation is detected through the detection assembly, the thickness is measured through the pull ropes in the splicing plates, and therefore the deformation position and the variable quantity can be found more accurately.

Description

Technical Field

[0001] The invention relates to the technical field of monitoring devices, in particular to a deformation monitoring device for an underwater steel cofferdam wall. Background Art

[0002] Steel cofferdam is a temporary structure used in bridge construction, mainly used to protect and support the construction area of ​​the bridge foundation. The main function of the steel cofferdam is to prevent water from entering, surround water, and support the pit wall of the foundation pit to ensure the safety and stability of the construction area.

[0003] During the construction of various buildings, the condition of the buildings often needs to be measured and monitored. Steel cofferdams are auxiliary measures widely used in underwater construction, and their structural safety is an important part of construction management and control. The key and difficulty of monitoring steel cofferdams is the measurement of stress and deformation. These two important indicators directly reflect the parameters of the stress state of the steel cofferdam and play a decisive role in the structural safety of the steel cofferdam. In the prior art, stress gauges are usually installed on the wall of the above-water part of the steel cofferdam to measure the stress and strain of the wall of the steel cofferdam. However, the monitoring range of this method is limited, and it is impossible to locate the deformation position of the wall and measure the deformation size. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a deformation monitoring device for the wall of an underwater steel cofferdam to solve the problems raised in the above-mentioned background technology. The present invention has a novel structure. The corresponding detection long plates are installed according to the length of the wall through the splicing plates and the fixed frame to contact the wall. When the wall is deformed, the splicing plates at the corresponding positions will be squeezed to move, causing them to be misaligned with the splicing plates on both sides. The lateral distance of the misalignment is detected by the detection component, and the thickness is measured by the pull rope inside the splicing plate, so as to find the deformation position and change amount more accurately.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a deformation monitoring device for the wall surface of an underwater steel cofferdam, comprising a fixed frame, wherein the fixed frame is provided with two groups, and the sides of the two groups of the fixed frames are both installed with fixed plates, and a cross plate assembly is provided between the two groups of the fixed plates, and the cross plate assembly includes a splicing plate, and the splicing plates are provided with multiple groups, and connecting rods are installed at the bottoms of adjacent splicing plates, and a movable groove is opened on the back of the splicing plate, and an intermediate plate is fixed in the middle position of the movable groove, and pull ropes are fixed to the top of one side and the bottom of the other side of the intermediate plate, and the movable groove is provided with a plurality of connecting rods. An upper winding seat is fixed at one end, and a lower winding seat is fixed at the other end of the movable groove, the pull ropes are respectively wound inside the winding seats of another group of splicing plates, a detection assembly is provided on the top of the cross plate assembly, the detection assembly includes a cross frame, fixing parts are fixed at both ends of the cross frame, and a movable frame is slidably connected inside the cross frame, the movable frame is symmetrically provided with two groups of telescopic columns at the position of the top of the splicing plate, and a contact block is fixed at the extended end of the telescopic column, a movable block is slidably installed inside the fixed frame, and a monitor is fixedly installed inside the movable block, and a probe is installed on the top of the monitor.

[0006] Furthermore, an outer transmission belt is installed on the outer surface of the fixed frame, and two pulleys of the outer transmission belt are rotatably installed on the top and bottom of the fixed frame respectively, an inner transmission belt is installed on the inner wall of the fixed frame at the same position as the outer transmission belt, and the pulleys of the inner transmission belt and the outer transmission belt are coaxially connected, and a motor for driving the inner transmission belt and the outer transmission belt to rotate is installed inside the fixed frame.

[0007] Furthermore, the moving block is fixed on the belt surface of the inner transmission belt, a connecting block is fixed on the fixed plate at a position corresponding to the outer transmission belt, and the connecting block is fixed on the belt of the outer transmission belt.

[0008] Furthermore, the cross plate assembly also includes a slide groove, a slide groove is opened at the bottom of both ends of the splicing plate, and a slider is slidably connected inside the slide groove, an insertion rod is fixed to one end of the slider, and the insertion rod is slidably inserted into the splicing plate, and the end of the insertion rod that penetrates into the splicing plate is sleeved with a first spring, and a sealing ring is provided on the surface of the slide groove at the end where the insertion rod passes through.

[0009] Furthermore, a stud is rotatably mounted on the bottom of the slider, both ends of the connecting rod are sleeved on the stud, and the stud of the slider is located on the outside of the connecting rod and is meshed with a nut.

[0010] Furthermore, one end of the lower winding seat and the upper winding seat are both equipped with angle sensors, and the angle sensors are fixedly connected to the winding shafts of the lower winding seat and the upper winding seat.

[0011] Furthermore, a contact plate is fixed to one end of the pull rope close to the lower winding seat and the upper winding seat, and contact modules are fixed to the inner walls at both ends of the slide groove corresponding to the positions where the pull rope passes through.

[0012] Furthermore, the detection component also includes a screw, which is rotatably installed inside the horizontal frame through a bearing, and the top of the movable frame is threadedly sleeved on the screw. A small motor is fixed to one end of the horizontal frame, and the output end of the small motor is fixedly connected to the screw.

[0013] Furthermore, the movable frame is provided with a movable opening at the position of the two telescopic columns, and the extended end of the telescopic column slides along the movable opening, the top of the fixed plate and the splicing plate are provided with a top groove, and the contact block slides along the top groove, and the storage end and the extended end of the telescopic column are fixed with a second spring.

[0014] Furthermore, two electric push rods are fixed on the upper and lower surfaces of the movable frame, and mounting plates are fixed on both sides of the extended ends of the electric push rods, the mounting plates are fixedly connected to the corresponding telescopic columns, and rangefinders are installed on the inner surfaces of the two telescopic columns.

[0015] Beneficial effects of the present invention:

[0016] 1. When the splicing plate moves outward due to the deformation of the wall, the pull ropes on both sides will be pulled to move, so that the lower winding seat and the upper winding seat inside the splicing plates on both sides will unwind. During this process, the contact plate will move with the pull rope and contact the contact module, sending a signal to indicate that there is deformation at this position, and the unwinding amount of the pull rope is calculated through the angle sensor on the outside of the lower winding seat and the upper winding seat, thereby obtaining the displacement distance of the splicing plate and the thickness of the wall deformation.

[0017] 2. Both ends of the connecting rod of the present invention are sleeved on the studs and locked by nuts. When the splicing plate is squeezed by the wall and moves outward, the connecting rod will drive the slider to slide along the slide groove and pull out the plug rod, thereby maintaining the connectivity of the two sets of splicing plates and giving the splicing plates a movable range.

[0018] 3. The present invention can drive the cross plate assembly to slide along the wall through the inner transmission belt and the outer transmission belt to detect the wall. The detection assembly moves synchronously, and the moving block inside the fixed frame drives the monitor and the probe to move. The probe contacts the wall, thereby monitoring the strain force inside the wall.

[0019] 4. In the present invention, when a splicing plate is displaced and a position signal is received, a small motor drives the screw to rotate, and the moving frame cooperates with the screw thread to slide along the horizontal frame, and the contact block at the bottom of the telescopic column on the moving frame slides along the top groove. When it moves to the deformation position, because the splicing plate is ejected, the contact block is not restricted, and the telescopic column will be extended by the second spring to move the position of the telescopic column to the two ends of the deformation position. The two groups of telescopic columns are controlled by two groups of electric push rods to slide along the moving opening, and stop immediately when resistance is felt. The distance between the two telescopic columns is measured by a rangefinder to obtain the width of the deformation position.

[0020] 5. In the process of pushing out the second electric push rod of the present invention, the third motor drives the two winding seats to synchronously unwind the pull rope, so as to facilitate the deployment of the second electric push rod to enclose the defective part. In the subsequent retraction process, the second electric push rod can be stored on the back of the robot body by winding the pull rope by the winding seat, so as to facilitate the overall movement of the device.

[0021] 6. Compared with the prior art, the present invention installs corresponding detection long plates according to the length of the wall through the splicing plates and the fixed frame to contact the wall. When the wall is deformed, the splicing plates at the corresponding positions will be squeezed to move, causing them to be misaligned with the splicing plates on both sides. The lateral distance of the misalignment is detected by the detection component, and the thickness is measured by the pull rope inside the splicing plate, so as to find the deformation position and change amount more accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of a deformation monitoring device for the wall surface of an underwater steel cofferdam according to the present invention;

[0023] Figure 2 It is a schematic diagram of the internal structure of a fixed frame of a deformation monitoring device for the wall surface of an underwater steel cofferdam according to the present invention;

[0024] Figure 3 It is a schematic diagram of the back structure of a transverse plate assembly of a deformation monitoring device for an underwater steel cofferdam wall according to the present invention;

[0025] Figure 4 It is a schematic diagram of the connection between the detection component and the fixing plate of a deformation monitoring device for the wall surface of an underwater steel cofferdam according to the present invention;

[0026] Figure 5 It is a schematic structural diagram of a transverse plate assembly of a deformation monitoring device for an underwater steel cofferdam wall according to the present invention;

[0027] Figure 6 It is a schematic diagram of the installation structure of the lower end winding seat and the upper end winding seat of a deformation monitoring device for the wall surface of an underwater steel cofferdam according to the present invention;

[0028] Figure 7It is a schematic diagram of the connection between the transverse plate assembly and the detection assembly of a deformation monitoring device for the wall surface of an underwater steel cofferdam according to the present invention;

[0029] Figure 8 The present invention is a schematic diagram of the internal structure of a splicing plate of a deformation monitoring device for an underwater steel cofferdam wall.

[0030] In the figure: 1, fixed frame; 11, inner transmission belt; 12, outer transmission belt; 13, moving block; 14, monitor; 15, probe; 2, fixed plate; 21, connecting block; 3, cross plate assembly; 31, splicing plate; 32, moving groove; 33, middle plate; 34, connecting rod; 35, upper winding seat; 36, pull rope; 37, slide groove; 38, lower winding seat; 39, angle sensor; 310, contact plate; 311, Contact module; 312, top groove; 313, plug rod; 314, first spring; 315, slider; 316, sealing ring; 317, nut; 4, detection component; 41, cross frame; 42, screw; 43, small motor; 44, moving frame; 45, fixing part; 46, telescopic column; 47, moving port; 48, second spring; 49, contact block; 410, electric push rod; 411, mounting plate; 412, distance meter. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0032] See also Figures 1 to 8The present invention provides a technical solution: a deformation monitoring device for the wall of an underwater steel cofferdam, comprising a fixed frame 1, wherein the fixed frame 1 is provided with two groups, and the sides of the two groups of the fixed frames 1 are both installed with fixed plates 2, and a cross plate assembly 3 is provided between the two groups of the fixed plates 2, and the cross plate assembly 3 includes a splicing plate 31, and the splicing plates 31 are provided with multiple groups, and connecting rods 34 are installed at the bottoms of adjacent splicing plates 31, and a moving groove 32 is opened on the back of the splicing plate 31, and an intermediate plate 33 is fixed at the middle position of the moving groove 32, and a pull rope 36 is fixed to the top of one side and the bottom of the other side of the intermediate plate 33, an upper winding seat 35 is fixed to one end of the moving groove 32, and a lower winding seat 38 is fixed to the other end of the moving groove 32, and the pull rope 36 is respectively wound inside the winding seat of the other group of splicing plates 31, and a detection assembly 4 is provided on the top of the cross plate assembly 3, and the detection assembly Component 4 includes a transverse frame 41, at both ends of which are fixed fixing components 45, and a movable frame 44 is slidably connected inside the transverse frame 41, and the movable frame 44 is symmetrically provided with two sets of telescopic columns 46 at the position of the top of the splicing plate 31, and a contact block 49 is fixed to the extended end of the telescopic column 46, and a movable block 13 is slidably installed inside the fixed frame 1, and a monitor 14 is fixedly installed inside the movable block 13, and a probe 15 is installed on the top of the monitor 14. In this scheme, electrical equipment is all protected by waterproof packaging. When using the device, the fixed frame 1 is fixed on both sides of the wall, and the corresponding splicing plate 31 is selected according to the horizontal length of the wall to form a transverse plate assembly 3. At the same time, the detection assembly 4 is also selected with the same length for matching use. The deformation position of the wall is detected by moving the transverse plate assembly 3 along the wall, and the width and thickness of the deformation position are measured in cooperation with the detection assembly 4.

[0033] In this embodiment, an outer transmission belt 12 is installed on the outer surface of the fixed frame 1, and two pulleys of the outer transmission belt 12 are rotatably installed on the top and bottom of the fixed frame 1 respectively. An inner transmission belt 11 is installed on the inner wall of the fixed frame 1 at the same position as the outer transmission belt 12, and the pulleys of the inner transmission belt 11 and the outer transmission belt 12 are coaxially connected. A motor for driving the inner transmission belt 11 and the outer transmission belt 12 to rotate is installed inside the fixed frame 1. The moving block 13 is fixed on the belt surface of the inner transmission belt 11. A connecting block 21 is fixed to the position of the plate 2 corresponding to the outer transmission belt 12, and the connecting block 21 is fixed on the belt of the outer transmission belt 12. The inner transmission belt 11 and the outer transmission belt 12 can drive the cross plate assembly 3 to slide along the wall to detect the wall. The detection assembly 4 moves synchronously, and the moving block 13 inside the fixed frame 1 drives the monitor 14 and the probe 15 to move. The probe 15 contacts the wall to monitor the strain force inside the wall. This technical means is the existing intelligent string strain gauge 310JMZX-212HAT.

[0034] In this embodiment, the cross plate assembly 3 also includes a slide groove 37. The bottom of both ends of the splicing plate 31 is provided with a slide groove 37, and a slider 315 is slidably connected inside the slide groove 37. A plug rod 313 is fixed to one end of the slider 315, and the plug rod 313 is slidably inserted into the splicing plate 31. The end of the plug rod 313 that penetrates into the splicing plate 31 is sleeved with a first spring 314. The slide groove 37 is located on the surface of the end where the plug rod 313 passes through. A sealing ring 316 is provided on the surface of the slide groove 37 at the end where the plug rod 313 passes through. The bottom of the slider 315 is rotatably mounted. There are studs, both ends of the connecting rod 34 are sleeved on the studs, and the stud of the slider 315 is located on the outside of the connecting rod 34 and is meshed with a nut 317. The adjacent splicing plates 31 are connected by the connecting rod 34, and both ends of the connecting rod 34 are sleeved on the studs and locked by the nuts 317. When the splicing plates 31 are squeezed outward by the wall, the connecting rod 34 will drive the slider 315 to slide along the slide groove 37 and pull out the plug 313, thereby maintaining the connectivity of the two groups of splicing plates 31 and giving the splicing plates 31 a movable range.

[0035] In this embodiment, one end of the lower winding seat 38 and the upper winding seat 35 are both installed with an angle sensor 39, and the angle sensor 39 is fixedly connected to the winding shaft of the lower winding seat 38 and the upper winding seat 35. One end of the pull rope 36 close to the lower winding seat 38 and the upper winding seat 35 is fixed with a contact plate 310, and the inner wall at both ends of the slide groove 37 is fixed with a contact module 311 at the position where the pull rope 36 passes through. When the pull rope 36 moves, it will pull the pull ropes 36 on both sides to move, so that the lower winding seat 38 and the upper winding seat 35 inside the splicing plates 31 on both sides will unwind. In this process, the contact plate 310 will move with the pull rope 36 and contact with the contact module 311, sending a signal to indicate that there is deformation at this position, and the unwinding amount of the pull rope 36 is calculated through the angle sensor 39 on the outside of the lower winding seat 38 and the upper winding seat 35, thereby obtaining the displacement distance of the splicing plate 31 and the thickness of the wall deformation.

[0036] In this embodiment, the detection component 4 also includes a screw 42, the screw 42 is rotatably installed inside the transverse frame 41 through a bearing, and the top of the movable frame 44 is threadedly sleeved on the screw 42, one end of the transverse frame 41 is fixed with a small motor 43, and the output end of the small motor 43 is fixedly connected to the screw 42, the movable frame 44 is located at the position of the two telescopic columns 46 and a moving opening 47 is opened, and the extended end of the telescopic column 46 slides along the moving opening 47, the top of the fixed plate 2 and the splicing plate 31 are both provided with a top groove 312, and the contact block 49 slides along the top groove 312, the storage end and the extended end of the telescopic column 46 are fixed with a second spring 48, two electric push rods 410 are fixed on the surface of the movable frame 44 in an upper and lower stack, and the extended ends of the electric push rods 410 are fixed with mounting plates 411 on both sides, and the mounting plates 41 1 is fixedly connected with the corresponding telescopic column 46, and a rangefinder 412 is installed on the inner surface of the two telescopic columns 46. When the splicing plate 31 is displaced and the position signal is received, the small motor 43 drives the screw 42 to rotate, and the moving frame 44 and the screw 42 are threadedly matched to slide along the horizontal frame 41, and the contact block 49 at the bottom of the telescopic column 46 on the moving frame 44 slides along the top groove 312. When it moves to the deformation position, because the splicing plate 31 is pushed out, the contact block 49 is not restricted, and the telescopic column 46 will be extended by the second spring 48, and the position of the telescopic column 46 is moved to the two ends of the deformation position. The two groups of electric push rods 410 control the two groups of telescopic columns 46 to slide along the moving opening 47, and stop immediately when resistance is felt. The distance between the two telescopic columns 46 is measured by the rangefinder 412, so as to obtain the width of the deformation position.

[0037] When using the device, fix the fixed frame 1 on both sides of the wall, select the corresponding splicing plate 31 according to the horizontal length of the wall to install the cross-plate assembly 3, and at the same time select the same length for matching use of the detection assembly 4. The inner transmission belt 11 and the outer transmission belt 12 can drive the cross-plate assembly 3 to slide along the wall to detect the wall. The detection assembly 4 moves synchronously, and the moving block 13 inside the fixed frame 1 drives the monitor 14 and the probe 15 to move. The probe 15 contacts the wall to monitor the strain force inside the wall. When the splicing plate 31 moves outward due to the deformation of the wall, the pull ropes 36 on both sides will be pulled to move, so that the lower winding seat 38 and the upper winding seat 35 inside the splicing plates 31 on both sides are unwound. In this process, the contact plate 310 will move with the pull rope 36 and contact with the contact module 311, sending a signal to indicate that there is deformation at this position, and through the lower winding The angle sensor 39 on the outside of the seat 38 and the upper winding seat 35 calculates the unwinding amount of the pull rope 36, thereby obtaining the displacement distance of the splicing plate 31 and the thickness of the wall deformation. When the splicing plate 31 is displaced and the position signal is received, the small motor 43 drives the screw 42 to rotate, and the movable frame 44 and the screw 42 threadedly cooperate to slide along the horizontal frame 41, and the contact block 49 at the bottom of the telescopic column 46 on the movable frame 44 slides along the top groove 312. When it moves to the deformation position, because the splicing plate 31 is ejected, the contact block 49 is not restricted, and the telescopic column 46 will be extended by the second spring 48 to move the position of the telescopic column 46 to the two ends of the deformation position. The two groups of electric push rods 410 are used to control the two groups of telescopic columns 46 to slide along the moving opening 47. When resistance is felt, it stops immediately, and the distance between the two telescopic columns 46 is measured by the rangefinder 412 to obtain the width of the deformation position.

[0038] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A deformation monitoring device for an underwater steel cofferdam wall, comprising a fixing frame (1), characterized in that: The fixing frame (1) is provided with two groups, and the sides of the two groups of fixing frames (1) are both installed with fixing plates (2). A transverse plate assembly (3) is provided between the two groups of fixing plates (2). The transverse plate assembly (3) includes a splicing plate (31). The splicing plates (31) are provided with a plurality of groups. Connecting rods (34) are installed at the bottoms of adjacent splicing plates (31). A movable groove (32) is provided on the back of the splicing plate (31), and an intermediate plate (33) is fixed at the middle position of the movable groove (32). A pull rope (36) is fixed at the top of one side and the bottom of the other side of the intermediate plate (33). An upper winding seat (35) is fixed at one end of the movable groove (32), and a lower winding seat (38) is fixed at the other end of the movable groove (32). The pull ropes (36) are respectively rolled up inside the winding seats of another group of splicing plates (31); a detection assembly (4) is provided on the top of the cross plate assembly (3); the detection assembly (4) comprises a cross frame (41); fixing members (45) are fixed at both ends of the cross frame (41); and a movable frame (44) is slidably connected inside the cross frame (41); the movable frame (44) is symmetrically provided with two groups of telescopic columns (46) at the position of the top of the splicing plate (31); and a contact block (49) is fixed at the extended end of the telescopic column (46); a movable block (13) is slidably installed inside the fixed frame (1); and a monitoring instrument (14) is fixedly installed inside the movable block (13); and a probe (15) is installed on the top of the monitoring instrument (14).

2. The deformation monitoring device for underwater steel cofferdam wall according to claim 1, characterized in that: An outer transmission belt (12) is installed on the outer surface of the fixed frame (1), and two pulleys of the outer transmission belt (12) are rotatably installed on the top and bottom of the fixed frame (1), respectively; an inner transmission belt (11) is installed on the inner wall of the fixed frame (1) at the same position as the outer transmission belt (12), and the pulleys of the inner transmission belt (11) and the outer transmission belt (12) are coaxially connected; a motor for driving the inner transmission belt (11) and the outer transmission belt (12) to rotate is installed inside the fixed frame (1).

3. The deformation monitoring device for underwater steel cofferdam wall according to claim 2, characterized in that: The moving block (13) is fixed on the belt surface of the inner transmission belt (11), and a connecting block (21) is fixed on the fixed plate (2) at a position corresponding to the outer transmission belt (12), and the connecting block (21) is fixed on the belt of the outer transmission belt (12).

4. The deformation monitoring device for underwater steel cofferdam wall according to claim 1, characterized in that: The cross plate assembly (3) also includes a slide groove (37), the bottom of both ends of the splicing plate (31) is provided with a slide groove (37), and a slider (315) is slidably connected inside the slide groove (37), one end of the slider (315) is fixed with an insertion rod (313), and the insertion rod (313) is slidably inserted into the splicing plate (31), and the end of the insertion rod (313) that penetrates into the splicing plate (31) is sleeved with a first spring (314), and a sealing ring (316) is provided on the surface of the slide groove (37) located at the end where the insertion rod (313) passes through.

5. The deformation monitoring device for underwater steel cofferdam wall according to claim 4, characterized in that: A stud is rotatably mounted on the bottom of the slider (315), and both ends of the connecting rod (34) are sleeved on the stud. The stud of the slider (315) is located on the outside of the connecting rod (34) and is meshed with a nut (317).

6. The deformation monitoring device for underwater steel cofferdam wall according to claim 5, characterized in that: An angle sensor (39) is installed at one end of the lower winding seat (38) and the upper winding seat (35), and the angle sensor (39) is fixedly connected to the winding shafts of the lower winding seat (38) and the upper winding seat (35).

7. The deformation monitoring device for underwater steel cofferdam wall according to claim 6, characterized in that: A contact plate (310) is fixed to one end of the pull rope (36) close to the lower winding seat (38) and the upper winding seat (35), and a contact module (311) is fixed to the inner walls at both ends of the slide groove (37) at positions corresponding to where the pull rope (36) passes through.

8. The deformation monitoring device for underwater steel cofferdam wall according to claim 1, characterized in that: The detection assembly (4) further comprises a screw rod (42), the screw rod (42) is rotatably mounted inside the transverse frame (41) via a bearing, and the top of the movable frame (44) is threadedly sleeved on the screw rod (42), a small motor (43) is fixed to one end of the transverse frame (41), and the output end of the small motor (43) is fixedly connected to the screw rod (42).

9. The deformation monitoring device for underwater steel cofferdam wall according to claim 8, characterized in that: The movable frame (44) is provided with a movable opening (47) at the position of the two telescopic columns (46), and the extended end of the telescopic column (46) slides along the movable opening (47); the top of the fixed plate (2) and the splicing plate (31) are both provided with a top groove (312), and the contact block (49) slides along the top groove (312); the storage end and the extended end of the telescopic column (46) are fixed with a second spring (48).

10. The underwater steel cofferdam wall deformation monitoring device according to claim 9, characterized in that: Two electric push rods (410) are fixed on the upper and lower surfaces of the movable frame (44), and mounting plates (411) are fixed on both sides of the extended ends of the electric push rods (410), and the mounting plates (411) are fixedly connected to the corresponding telescopic columns (46), and distance meters (412) are installed on the inner surfaces of the two telescopic columns (46).

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