A pile deformation monitoring device and its usage method

Abstract

The present application relates to a pile body deformation monitoring device and a using method, and relates to the technical field of pile body detection. In order to solve the problem that the measurable data of pile body deformation detection is relatively one-sided, it includes a plurality of measurement rings sequentially arranged along the length direction of the pile body. The plurality of measurement rings are used for fixedly connecting to the outer side wall of the pile body, and the inner side wall of the measurement ring is connected with a plurality of inner rods for inserting into the pile body; a plurality of measurement rods arranged along the length direction of the pile body are connected between the adjacent measurement rings. The two ends of the measurement rod are respectively rotatably connected to the corresponding measurement rings. The measurement rod includes a sleeve and an insertion rod. The insertion rod is inserted into the sleeve, and the sleeve and the insertion rod are respectively rotatably connected to the corresponding measurement rings. Scale lines are arranged on the outer side wall of the insertion rod. The present application has the effect of improving the measurable data of pile body deformation detection.

Description

Technical Field

[0001] This application relates to the technical field of pile foundation detection, and particularly to a pile body deformation monitoring device and a using method thereof. Background Technique

[0002] The pile foundation settlement monitoring device is a device used for pressure testing of pile bodies in construction projects, and can specifically be used for the single-pile vertical static load test, that is, the vertical load is evenly transmitted to the building foundation piles, and the pile top settlement under different loads of a single pile is measured. The pile top settlement refers to the elastic compression amount of the pile itself when it is compressed, the settlement of the soil at the pile bottom caused by the side friction of the pile, and the settlement of the soil at the pile bottom caused by the pile end load.

[0003] In the related technology, the pile foundation settlement monitoring device includes several test rods with different lengths. The ends of several test rods are fixedly connected with buried plates. The upper ends of several test rods are arranged at the same height, and telescopic rods are connected to the upper ends of several test rods. The telescopic rods are connected to a base. When in use, several test rods drive the buried plates to be inserted into the soil layer at different depths. When different settlements occur at the test positions, the soil layer drives the buried plates to move, driving the test rods to pull the telescopic rods to extend. Construction workers can quickly judge which depth position of the soil layer has settlement through the rotation angle of the telescopic rods, and thus the detection of pile foundation settlement can be realized.

[0004] The above-mentioned related technology can be used to detect the change amount of the settlement of the soil at the pile bottom. In addition to the change in the settlement of the soil at the pile bottom when the pile body is compressed, the pile body itself will also generate deformation, and it is difficult to measure the compression amount of the pile body itself when the pile body is compressed, resulting in relatively one-sided measurable data for pile foundation settlement detection. Summary of the Invention

[0005] In order to improve the measurable data of pile body deformation detection, this application provides a pile body deformation monitoring device and a using method thereof.

[0006] The pile body deformation monitoring device and the using method provided by this application adopt the following technical solutions:

[0007] A pile body deformation monitoring device includes several measuring rings arranged in sequence along the length direction of the pile body. Several of the measuring rings are used for fixedly connecting to the outer side wall of the pile body. The inner side wall of the measuring ring is connected with several inner rods for inserting into the pile body. Several measuring rods are connected between the adjacent measuring rings along the length direction of the pile body. The two ends of the measuring rod are respectively rotatably connected to the corresponding measuring rings. The measuring rod includes a sleeve and an insertion rod. The insertion rod is inserted into the sleeve. The sleeve and the insertion rod are respectively rotatably connected to the corresponding measuring rings. Scale lines are arranged on the outer side wall of the insertion rod.

[0008] By adopting the above technical solution, when testing the pile body, the measuring ring is put on the outer wall of the pile body, and the inner rod is nailed into the pile body. The several measuring rods are rotated and connected between the corresponding two measuring rings to complete the installation of the monitoring device. When a load is applied to the upper end of the pile body, when the pile body is deformed, the corresponding inner rod will be driven to drive the measuring ring to drive the plug rod to be inserted into the corresponding sleeve. According to the insertion amount of different plug rods in the corresponding sleeve, the axial compression deformation of the pile body when it is loaded can be determined. The pile body deformation monitoring device can measure the compression deformation of the pile body itself at multiple locations on the pile body, supplement the data on the basis of the existing technology, and improve the measurable data of pile body deformation detection.

[0009] Preferably, the measuring ring comprises a plurality of arc plates, which are circumferentially arranged, a measuring rod is connected between two adjacent arc plates in the vertical direction, and a plurality of inner rods are respectively connected to the corresponding arc plates; a measuring rope is connected between two adjacent arc plates in the horizontal direction, and mounting holes are provided on the end walls of the arc plates, two ends of the measuring rope are respectively inserted into the corresponding mounting holes, and a first spring is connected between the end of the measuring rope and the bottom wall of the corresponding mounting hole.

[0010] By adopting the above technical solution, when the pile body is loaded, radial compression deformation will also occur. When the pile body is radially deformed, the corresponding inner rod will be driven to move the adjacent arc plates away from each other, so that the measuring rope will apply tension to the first spring. The construction personnel can judge the radial compression deformation of the pile body at different locations at the same height according to the degree of deformation of the first spring. At the same time, the setting of several arc plates can make the depth of different insertion rods into the corresponding casings different with the different axial deformation amounts of the pile body, so that the construction personnel can observe the uneven deformation of the pile body.

[0011] Preferably, the inner side wall of one of the arc-shaped plates is connected to at least two inner rods, a slide groove is provided on the side wall of the arc-shaped plate, a ball is connected in the slide groove, a groove opening of the slide groove is larger than a diameter of the ball, and the arc-shaped plate is horizontally arranged.

[0012] By adopting the above technical solution, the arc plate is in a horizontal state when installed on the pile body. When the pile body is subjected to load, the pile body will undergo axial deformation. When the axial deformation at different locations of the same height of the pile body is uneven, the arc plate will tilt. As the arc plate tilts, the balls will roll in the slide groove. When the construction workers observe the rolling of the balls, they can know that the arc plate at that location has tilted, and that the pile body at that location has undergone axial deformation.

[0013] Preferably, a stabilizing groove is provided on the inner side wall of the slide groove, the ball portion is located in the stabilizing groove, and the groove depth of the stabilizing groove is smaller than the ball radius.

[0014] By adopting the above technical solution, when the axial deformation of the pile body is small, the inclination degree of the arc-shaped plate is small at this time, and the axial deformation of the pile body is within the safe range. The inner side wall of the stabilizing groove can support the ball bearings, preventing the ball bearings from rolling within the safe range of the pile body deformation. When the construction workers observe, they can reduce the observation of the non-rolling ball bearings, shorten the observation time, and improve the detection efficiency.

[0015] Preferably, two second springs are arranged on the inner side wall of the chute. The two second springs are located on both sides of the ball bearing, and are respectively connected to the inner walls at both ends of the chute. The end of the second spring is in contact with the ball bearing, and the maximum elastic force of the second spring is greater than the gravity of the ball bearing.

[0016] By adopting the above technical solution, when the ball bearing rolls in the chute, the component force of the gravity of the ball bearing in the inclined direction of the arc-shaped plate will push and compress the corresponding second spring. The construction workers can judge the inclination degree of the arc-shaped plate according to the compression amount of the second spring, and further know the axial deformation degree of the pile body at this place.

[0017] Preferably, one end of the second spring close to the ball bearing is connected with a mounting plate. A roller is connected to the side wall of the mounting plate close to the ball bearing. The roller is embedded in the mounting plate, and a part of the side wall of the roller protrudes along the side wall of the mounting plate. The protruding side wall of the roller is in contact with the ball bearing.

[0018] Generally, the end of the second spring is directly in contact with the side wall of the ball bearing. When the ball bearing rolls, it will slide relative to the second spring. As the pressure acting on the side wall of the ball bearing increases due to the compression of the second spring, the friction force between the ball bearing and the second spring increases, and the ball bearing is likely to stop rolling and change to sliding. When the ball bearing slides, a sliding friction force is generated between it and the inner wall of the chute, resulting in an increase in the resistance when the ball bearing rolls, causing a large deformation error of the second spring and affecting the observation result. By adopting the above technical solution, when the ball bearing rolls, it contacts the roller and rolls relative to the roller. The mounting plate provides a mounting place for the roller. The relative rolling between the ball bearing and the roller avoids the direct contact between the ball bearing and the second spring, reduces the resistance of the ball bearing rolling in the chute, and reduces the influence on the observation structure due to the large deformation error of the second spring.

[0019] Preferably, a through groove is penetrated through the pipe wall of the sleeve, and a support groove body is connected to the outer side wall of the sleeve; a pressing plate is connected to the side wall of the inserting rod, and the pressing plate passes through the through groove and is inserted into the support groove body. The support groove body is open on the side away from the inserting rod, and an elastic water bag filled with liquid is placed in the support groove body.

[0020] By adopting the above technical solution,

[0021] Preferably, a protective layer is connected to the outer side wall of the elastic water bag on the side away from the inserting rod.

[0022] By adopting the above technical solution, when one side of the elastic water bag is deformed and expanded, the water bag on that side tends to become thinner. At this time, the protective layer can reduce the situation where the elastic water bag is punctured by sharp objects and causes leakage of liquid in the elastic water bag; at the same time, the protective layer can also reduce the sudden bursting of the elastic water bag caused by excessive deformation.

[0023] A method for using a pile deformation monitoring device:

[0024] Place several arc plates in several groups on the pile body, and nail the inner rod into the pile body, so that each group of arc plates is arranged along the circumference of the pile body; at the same time, weld the first spring into the corresponding installation hole, and finally rotate the measuring rod to connect it between the corresponding two arc plates to complete the installation of the monitoring device;

[0025] Apply a load to the upper end of the pile body. After a period of time, observe the insertion degree of different rods in the casing, and judge the specific deformation degree through the scale lines on the rods, and compare the data of each rod; then observe the degree of deformation caused by the pulling of the first spring by different measuring ropes, and observe the radial compression deformation of the pile body;

[0026] Check the rolling condition of each ball in the slide groove, determine the inclination of each arc plate, and observe the compression degree of each ball on the second spring to determine whether the pile body is uniform in the axial direction when deformed.

[0027] By adopting the above technical solution, after the construction personnel apply load on the pile body, they can obtain the axial and radial deformation degree of the pile body and the uniformity of the pile body deformation according to the rolling condition of the ball, the insertion condition of the rod into the sleeve and the deformation degree of the first spring.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. The pile deformation monitoring device can measure the compression deformation of the pile at multiple locations on the pile, supplement the data on the basis of the existing technology, and improve the measurable data of pile deformation detection.

[0030] 2. The arrangement of several arc-shaped plates allows different insertion depths of the rods into the corresponding casings to vary with the axial deformation amounts at different locations of the pile body, allowing construction personnel to observe the uneven deformation of the pile body.

[0031] 3. The setting of the ball and the second spring allows construction workers to observe the uniformity of axial deformation at various locations at the same height of the pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram used to reflect the positional relationship between the pile body and the pile body deformation monitoring device in the embodiment of the present application.

[0033] Figure 2 This is a schematic structural diagram of a pile body deformation monitoring device in an embodiment of the present application.

[0034] Figure 3 This is a schematic structural diagram for showing the positional relationship between the arc-shaped plate, the ball, and the sliding groove in an embodiment of the present application.

[0035] Figure 4 This is a schematic structural diagram for showing the positional relationship between the stable groove and the sliding groove in an embodiment of the present application.

[0036] Figure 5 It is Figure 2 an enlarged schematic diagram of part A in

[0037] Explanation of reference numerals: 1, pile body; 2, measuring ring; 21, arc-shaped plate; 211, mounting hole; 212, first spring; 213, measuring rope; 214, sliding groove; 215, ball; 216, second spring; 217, mounting plate; 218, roller; 219, stable groove; 22, inner rod; 3, measuring rod; 31, inserting rod; 311, pressing plate; 32, sleeve; 321, through groove; 322, support groove body; 33, elastic water bag; 331, protective layer. Specific embodiments

[0038] The following will Figures 1-5 further elaborate on the present application in detail with reference to the attached drawings.

[0039] An embodiment of the present application discloses a pile body deformation monitoring device. Referring to Figure 1 and Figure 2 , the pile body deformation monitoring device includes a plurality of measuring rings 2, the measuring rings 2 are sleeved on the side wall of the pile body 1 along the length direction of the pile body 1, the measuring ring 2 includes a plurality of arc-shaped plates 21, the plurality of arc-shaped plates 21 are divided into three groups, and the arc-shaped plates 21 in each group are arranged in sequence along the circumferential direction of the pile body 1 to form a measuring ring 2, and an inner rod 22 is welded and connected to the inner wall of the arc-shaped plate 21.

[0040] Referring to Figure 2 , mounting holes 211 are provided in the end walls at both ends of the arc-shaped plate 21, a first spring 212 is fixedly connected in the mounting holes 211, a measuring rope 213 is connected between two horizontally adjacent arc-shaped plates 21, and both ends of the measuring rope 213 are respectively inserted into the mounting holes 211 of the corresponding arc-shaped plates 21 and fixedly connected to the corresponding first springs 212.

[0041] Referring to Figure 1 , a measuring rod 3 is connected between two vertically adjacent arc-shaped plates 21, the measuring rod 3 includes a sleeve 32 and an inserting rod 31, the inserting rod 31 is located at the upper end of the sleeve 32 and inserted into the sleeve 32, and scale lines are coated on the side wall of the inserting rod 31; the upper end of the inserting rod 31 is rotatably connected to the corresponding arc-shaped plate 21, and the lower end of the sleeve 32 is rotatably connected to the corresponding arc-shaped plate 21.

[0042] When detecting the pile body 1, a number of arc-shaped plates 21 are placed at the pile body 1 in three groups, and the inner rod 22 is nailed into the pile body 1, so that the three groups of arc-shaped plates 21 are arranged along the circumferential direction of the pile body 1; at the same time, the first spring 212 is welded into the corresponding mounting hole 211, and finally the measuring rod 3 is rotatably connected between two corresponding arc-shaped plates 21 to complete the installation of the monitoring device. When a load is applied to the upper end of the pile body 1, when the pile body 1 deforms axially, it will drive the corresponding inner rod 22 to make the arc-shaped plate 21 drive the insertion rod 31 to insert into the corresponding sleeve 32. When the pile body 1 deforms radially, it will drive the corresponding inner rod 22 to make the adjacent arc-shaped plates 21 move away from each other, so that the measuring rope 213 applies a tensile force to the first spring 212; according to the insertion amount of different insertion rods 31 in the corresponding sleeves 32 and the degree of deformation of different measuring ropes 213 pulling the corresponding first springs 212, the compression deformation amount of the pile body 1 when subjected to the load can be judged. The construction personnel can judge the axial compression deformation amount of the pile body 1 at different positions according to the scale lines on the insertion rod 31, and the construction personnel can also judge the radial compression deformation amount of the pile body 1 at different positions according to the degree of deformation of the first spring 212.

[0043] Refer to Figure 3 , a chute 214 is formed in the side wall of the arc-shaped plate 21, and a ball 215 is rotatably connected in the chute 214. The notch of the chute 214 is larger than the diameter of the ball 215; two second springs 216 are arranged on the inner side wall of the chute 214. The two second springs 216 are located on both sides of the ball 215. The second springs 216 are fixedly connected to the inner walls at both ends of the chute 214. The end of the second spring 216 close to the ball 215 is fixedly connected with a mounting plate 217. A roller 218 is embedded in the mounting plate 217. Part of the side wall of the roller 218 protrudes along the side wall of the mounting plate 217. The side wall of the roller 218 protruding from the mounting plate 217 is in contact with the ball 215; the mounting plate 217 is a light plate, and the maximum elastic force of the second spring 216 is greater than the total gravity of the ball 215 and the mounting plate 217.

[0044] When the arc-shaped plate 21 is installed on the pile body 1, it is in a horizontal state. After the pile body 1 is subjected to a load, the pile body 1 will undergo axial deformation. When the axial deformations at various parts of the same height of the pile body 1 are uneven, the arc-shaped plate 21 will tilt. As the arc-shaped plate 21 tilts, the ball 215 will roll in the chute 214. When the ball 215 rolls in the chute 214, the component force of the gravity of the ball 215 in the tilting direction of the arc-shaped plate 21 will push the mounting plate 217 on one side to compress the second spring 216. The construction worker can judge whether the arc-shaped plate 21 is tilted according to whether the ball 215 rolls, so as to judge whether the axial deformation at this part of the pile body 1 is uniform. At the same time, the construction worker can judge the degree of axial deformation at this part of the pile body 1 according to the compression amount of the second spring 216. When the ball 215 rolls, it contacts the roller 218 and rolls relative to the roller 218. The mounting plate 217 provides an installation place for the roller 218. The relative rolling of the ball 215 and the roller 218 avoids the direct contact between the ball 215 and the second spring 216, reduces the resistance of the ball 215 rolling in the chute 214, and reduces the influence of the large deformation error of the second spring 216 on the observation structure.

[0045] Refer to Figure 3 and Figure 4 , a stabilizing groove 219 is formed in the inner side wall of the chute 214 close to the ground direction. Part of the ball 215 is located in the stabilizing groove 219, and the groove depth of the stabilizing groove 219 is less than the radius of the ball 215; when the axial deformation of the pile body 1 is small, at this time the tilting degree of the arc-shaped plate 21 is small, and the axial deformation of the pile body 1 is within the safe range. The inner side wall of the stabilizing groove 219 can support the ball 215 to avoid the ball 215 from rolling within the safe range of the deformation of the pile body 1. Can the construction worker reduce the observation of the non-rolling ball 215 when observing, shorten the observation time, and improve the detection efficiency.

[0046] Refer to Figure 2 and Figure 5 , a through groove 321 is formed through the pipe wall of the sleeve 32. The through groove 321 is formed along the length direction of the sleeve 32. A support groove body 322 is connected to the outer side wall of the sleeve 32; a pressing plate 311 is fixedly connected to the side wall of the insertion rod 31. The pressing plate 311 passes through the through groove 321 and is inserted into the support groove body 322 from above the support groove body 322. The support groove body 322 is open on the side away from the sleeve rod. An elastic water bag 33 is placed in the support groove body 322. The elastic water bag 33 can be made of elastic rubber material. The elastic water bag 33 is filled with liquid, and the elastic water bag 33 is adhesively connected to the bottom wall of the support groove body 322.

[0047] When the deformation of the pile body 1 drives the insertion rod 31 to insert into the sleeve 32, the pressing plate 311 moves downward simultaneously and further inserts into the support groove 322. When the pressing plate 311 moves downward, it applies pressure to the elastic water bag 33 at the same time. The elastic water bag 33 is deformed under pressure. Since one side of the support groove 322 away from the sleeve rod is open, the elastic water bag 33 will deform in the direction away from the sleeve rod. When observing the axial deformation of the pile body 1, the construction personnel can preferably select the part where the deformation amount of the elastic water bag 33 is larger and judge that the deformation amount of the pile body 1 at this place is larger.

[0048] Refer to Figure 2 and Figure 5 A protective layer 331 is connected to the outer wall of the elastic water bag 33 on the side away from the sleeve rod. The protective layer 331 is made of a rubber material with certain toughness and elasticity. The protective layer 331 can reduce the situation that the elastic water bag 33 is punctured by sharp objects and the liquid in the elastic water bag 33 leaks.

[0049] The implementation principle of the pile body deformation monitoring device in the embodiment of the present application is as follows:

[0050] When detecting the pile body 1, several arc-shaped plates 21 are placed at the pile body 1 in three groups, and the inner rod 22 is nailed into the pile body 1 to make the three groups of arc-shaped plates 21 arranged along the circumferential direction of the pile body 1; at the same time, the first spring 212 is welded into the corresponding mounting hole 211, and finally the measuring rod 3 is rotatably connected between the corresponding two arc-shaped plates 21 to complete the installation of the monitoring device. A load is applied to the upper end of the pile body 1. According to the insertion amount of different insertion rods 31 in the corresponding sleeves 32 and the degree of deformation of different measuring ropes 213 pulling the corresponding first springs 212, the compression deformation amount of the pile body 1 when subjected to the load can be judged. The construction personnel can judge the axial compression deformation amount of the pile body 1 at different places according to the scale lines on the insertion rod 31, and the construction personnel can also judge the radial compression deformation amount of the pile body 1 at different places according to the degree of deformation of the first spring 212. This pile body deformation monitoring device can measure the self-compression deformation amount of the pile body 1 at multiple places of the pile body 1, supplement data on the basis of the existing technology, and improve the measurable data of pile body deformation detection.

[0051] The embodiment of the present application also discloses a use method for the pile body deformation monitoring device:

[0052] Place several arc-shaped plates 21 in several groups at the pile body 1, and nail the inner rod 22 into the pile body 1 to make each group of arc-shaped plates 21 arranged along the circumferential direction of the pile body 1; at the same time, weld the first spring 212 into the corresponding mounting hole 211, and finally rotatably connect the measuring rod 3 between the corresponding two arc-shaped plates 21 to complete the installation of the monitoring device;

[0053] Apply a load to the upper end of the pile body 1. After a period of time, observe the insertion degree of different insertion rods 31 in the sleeve 32, judge the specific deformation degree through the scale lines on the insertion rods 31, and compare the data of each insertion rod 31; then check the degree of deformation of the corresponding first spring 212 pulled by different measuring ropes 213, and observe the radial compression deformation amount of the pile body 1.

[0054] Check the rolling condition of each ball 215 in the chute 214, judge the inclination condition of each arc plate 21, and observe the compression degree of each ball 215 on the second spring 216 to judge whether the pile body 1 has uniformity in the axial direction during deformation.

[0055] The above are all the preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A pile deformation monitoring device, characterized in that, It includes a number of measuring rings (2) arranged in sequence along the length direction of the pile body (1). A number of the measuring rings (2) are used for fixedly connecting to the outer side wall of the pile body (1). A number of inner rods (22) for inserting into the pile body (1) are connected to the inner side wall of the measuring ring (2); A number of measuring rods (3) arranged along the length direction of the pile body (1) are connected between the adjacent measuring rings (2). Two ends of the measuring rod (3) are respectively rotatably connected to the corresponding measuring rings (2). The measuring rod (3) includes a sleeve (32) and an inserting rod (31). The inserting rod (31) is inserted into the sleeve (32). The sleeve (32) and the inserting rod (31) are respectively rotatably connected to the corresponding measuring rings (2). Scale lines are arranged on the outer side wall of the inserting rod (31). The measuring ring (2) includes a number of arc-shaped plates (21). A number of the arc-shaped plates (21) are arranged circumferentially. A measuring rod (3) is connected between two adjacent arc-shaped plates (21) in the vertical direction. A number of the inner rods (22) are respectively connected to the corresponding arc-shaped plates (21); A measuring rope (213) is connected between two adjacent arc-shaped plates (21) in the horizontal direction. An installation hole (211) is formed in the end wall of the arc-shaped plate (21). Two ends of the measuring rope (213) are respectively inserted into the corresponding installation holes (211). A first spring (212) is connected between the end of the measuring rope (213) and the bottom wall of the corresponding installation hole (211). At least two inner rods (22) are connected to the inner side wall of one arc-shaped plate (21). A sliding groove (214) is formed in the side wall of the arc-shaped plate (21). A ball (215) is connected in the sliding groove (214). The opening of the sliding groove (214) is larger than the diameter of the ball (215). The arc-shaped plate (21) is horizontally arranged. A stable groove (219) is formed in the inner side wall of the sliding groove (214). Part of the ball (215) is located in the stable groove (219). The depth of the stable groove (219) is less than the radius of the ball (215). Two second springs (216) are arranged on the inner side wall of the sliding groove (214). The two second springs (216) are located on both sides of the ball (215). The two second springs (216) are respectively connected to the inner walls at both ends of the sliding groove (214). The end of the second spring (216) is in contact with the ball (215). The maximum elastic force of the second spring (216) is greater than the gravity of the ball (215).

2. The pile deformation monitoring device according to claim 1, characterized in that One end of the second spring (216) close to the ball (215) is connected with a mounting plate (217). A roller (218) is connected to the side wall of the mounting plate (217) close to the ball (215). The roller (218) is embedded in the mounting plate (217). Part of the side wall of the roller (218) protrudes along the side wall of the mounting plate (217). The side wall of the roller (218) protruding from the mounting plate (217) is in contact with the ball (215).

3. The pile deformation monitoring device according to claim 1, wherein, A through groove (321) is formed through the pipe wall of the sleeve (32), and a support groove body (322) is connected to the outer side wall of the sleeve (32); a pressing plate (311) is connected to the side wall of the insertion rod (31), the pressing plate (311) passes through the through groove (321) and is inserted into the support groove body (322), the support groove body (322) is open on the side away from the insertion rod (31), and an elastic water bag (33) filled with liquid is placed in the support groove body (322).

4. The pile body deformation monitoring device according to claim 3, characterized in that, A protective layer (331) is connected to the outer side wall of the elastic water bag (33) on the side away from the insertion rod (31).

5. A method for using the pile deformation monitoring device according to claim 2, characterized in that: A plurality of arc-shaped plates (21) are placed in groups at the pile body (1), and the inner rod (22) is nailed into the pile body (1) so that each group of arc-shaped plates (21) is arranged circumferentially along the pile body (1); at the same time, the first spring (212) is welded into the corresponding mounting hole (211), and finally the measuring rod (3) is rotatably connected between the corresponding two arc-shaped plates (21) to complete the installation of the monitoring device; A load is applied to the upper end of the pile body (1). After a period of time, observe the insertion degree of different insertion rods (31) in the sleeve (32), and judge the specific deformation degree through the scale lines on the insertion rods (31), and compare the data of each insertion rod (31); then look at the degree of deformation of the corresponding first spring (212) pulled by different measuring ropes (213) to observe the radial compression deformation amount of the pile body (1); Check the rolling condition of each ball (215) in the sliding groove (214) to judge the inclination condition of each arc-shaped plate (21), and observe the compression degree of each ball (215) on the second spring (216) to judge whether the pile body (1) has uniformity in the axial direction during deformation.

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