A device for detecting the verticality of a pile

Abstract

This application discloses a pile verticality testing device, including a clamping mechanism and a verticality testing mechanism. The clamping mechanism achieves rapid clamping and adaptation of square, circular, and irregularly shaped piles through an adjustable clamping plate and locking assembly. The verticality testing mechanism includes two verticality testing components: left and right, and front and rear. A measurement benchmark parallel to the pile's central axis is established through continuous contact between rollers and the pile's outer contour. Combined with a gravity benchmark formed by a plumb bob, an angle sensor detects the angle between the two components to obtain the pile's inclination angle in two orthogonal directions, thereby calculating the verticality. This device requires no external equipment such as a total station, enabling rapid, continuous, and high-precision testing, and is suitable for piles with various cross-sectional shapes.

Description

Technical Field

[0001] This application relates to pile testing equipment, and more particularly to a pile verticality testing device. Background Technology

[0002] As a crucial foundation component in bridge, building, municipal, water conservancy, and power engineering projects, the verticality of foundation piles directly affects the structure's load-bearing capacity, stress state, and subsequent construction quality. Therefore, during and after foundation pile construction, it is typically necessary to inspect the verticality of the piles to determine if they meet design requirements.

[0003] Existing methods for detecting the verticality of foundation piles mainly include total station measurement, laser plumb line measurement, and measuring by directly installing an angle detection device on the surface of the foundation pile.

[0004] For example, Chinese patent document CN119555031B discloses a pipe pile verticality testing device and method, including: a strip plate with two connecting ends for surrounding the outside of the pipe pile, the two connecting ends being connected by a fixing part; a positioning part disposed on the inner side of the strip plate, wherein when the strip plate surrounds the outside of the pipe pile, multiple pressure sensors in the positioning part detect whether the axis of the ring-shaped strip plate coincides with the axis of the pipe pile; and a verticality detector movably disposed on the outside of the strip plate. By positioning the strip plate, the position of the verticality detector located on the strip plate can be quickly positioned, thereby accurately measuring the verticality of the pipe pile axis when the verticality detector performs testing.

[0005] However, the above-mentioned technical solution requires first establishing an additional installation benchmark that coincides with the central axis of the pipe pile, and then using a verticality measuring instrument to measure the attitude. The accuracy of this measurement depends on the positioning accuracy between the strip plate and the pipe pile. In actual engineering projects, foundation piles include not only circular piles but also square, elliptical, and polygonal cross-sectional shapes. When the cross-sectional shape of the foundation pile changes, the annular strip plate and positioning part cannot form a stable and uniform positioning fit with different outer contours, thus affecting the alignment accuracy between the strip plate axis and the central axis of the foundation pile, and consequently affecting the verticality measurement results. Furthermore, the positioning part usually includes multiple pressure sensors. When the contact state between some pressure sensors and the outer wall of irregularly shaped foundation piles changes, it can easily lead to deviations in the positioning benchmark, further reducing the accuracy of the measurement results. Therefore, the adaptability of existing technologies to foundation piles with different cross-sectional shapes still needs improvement. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a pile verticality detection device.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A pile verticality testing device, comprising: Clamping mechanism; Left and right verticality detection components and front and back verticality detection components are installed on the clamping mechanism; The left and right verticality detection component includes a first support arm, a second support arm, a first roller, a second roller, and a first angle sensor. The first roller and the second roller respectively maintain rolling contact with the outer contour of the foundation pile at axially spaced positions to establish a first measurement reference. The first measurement reference is parallel to the central axis of the foundation pile. The first angle sensor is used to detect the first tilt angle of the first measurement reference relative to the direction of gravity. The front and rear verticality detection component includes a third support arm, a fourth support arm, a third roller, a fourth roller, and a second angle sensor. The third roller and the fourth roller respectively maintain rolling contact with the outer contour of the foundation pile at axially spaced positions to establish a second measurement reference. The second measurement reference is parallel to the central axis of the foundation pile. The second angle sensor is used to detect the second tilt angle of the second measurement reference relative to the direction of gravity. The verticality of the foundation pile is obtained based on the first tilt angle and the second tilt angle.

[0008] Furthermore, the first roller and the second roller maintain rolling contact with two axially spaced positions on the same continuous generatrix of the foundation pile to establish the first measurement reference; the third roller and the fourth roller maintain rolling contact with two axially spaced positions on another continuous generatrix of the foundation pile to establish the second measurement reference.

[0009] Furthermore, the first measurement reference and the second measurement reference are respectively parallel to the central axis of the pile, so that the first tilt angle and the second tilt angle respectively correspond to the tilt angles of the central axis of the pile in two mutually perpendicular detection directions.

[0010] Furthermore, the first angle sensor is used to detect the first tilt angle of the pile in the first detection direction, and the second angle sensor is used to detect the second tilt angle of the pile in the second detection direction. The first tilt angle and the second tilt angle together characterize the spatial tilt attitude of the pile.

[0011] Furthermore, the first roller and the second roller maintain continuous contact with the outer contour of the pile during rolling to maintain the first measurement reference; the third roller and the fourth roller maintain continuous contact with the outer contour of the pile during rolling to maintain the second measurement reference.

[0012] Furthermore, the foundation pile is a circular foundation pile, a square foundation pile, an elliptical foundation pile, a polygonal foundation pile, or other columnar member with a continuous generatrix and the continuous generatrix being parallel to its central axis.

[0013] Furthermore, the clamping mechanism includes a first clamping plate, a second clamping plate, a fastening plate, a locking assembly, and fasteners. The first clamping plate and the second clamping plate are respectively disposed on opposite sides of the foundation pile. The fastening plate is connected to the first clamping plate and the second clamping plate, and the clamping state of the clamping mechanism is adjusted by the locking assembly.

[0014] Furthermore, a first clamping plane and a first V-shaped clamping portion are formed on both sides of the first clamping plate, and a second clamping plane and a second V-shaped clamping portion are formed on both sides of the second clamping plate; wherein, the first clamping plane and the second clamping plane cooperate to form a square pile clamping position, and the first V-shaped clamping portion and the second V-shaped clamping portion cooperate to form a circular pile clamping position.

[0015] Furthermore, the first clamping plate, the second clamping plate, and the fastening plate are all provided with strip-shaped through holes extending along the length direction. The locking component passes through the strip-shaped through hole and can move along the strip-shaped through hole to adjust the clamping size of the clamping mechanism. After the locking component rotates, it abuts against the hole wall of the strip-shaped through hole to restrict the movement of the locking component along the strip-shaped through hole.

[0016] Furthermore, the fastener is threadedly engaged with the fastening plate. When the fastener is rotated, the fastener drives the second clamping plate to move toward the first clamping plate, so that the first clamping plate and the second clamping plate clamp the foundation pile. At the same time, the fastening plate moves in the opposite direction to the second clamping plate under the action of the thread and presses the locking assembly, so that the locking assembly forms a pre-tight fit with the strip-shaped through hole.

[0017] Compared with the prior art, the beneficial effects of this application are as follows: This application sets up left and right verticality detection components and front and rear verticality detection components on the clamping mechanism, and uses two sets of rollers to establish a first measurement reference and a second measurement reference at axial intervals along the outer contour of the foundation pile, respectively. By using the fixed geometric relationship between the first measurement reference, the second measurement reference and the central axis of the foundation pile, combined with the tilt angle detected by the angle sensor, the verticality of the central axis of the foundation pile is indirectly obtained. There is no need to establish an additional installation reference that coincides with the central axis of the foundation pile, which avoids the problem of decreased detection accuracy caused by the positioning error of the additional installation reference in the prior art, and improves the accuracy and reliability of verticality detection.

[0018] Meanwhile, the measurement benchmark of this application is directly established on the continuous generatrix formed by the outer contour of the pile itself. As long as the pile has a continuous generatrix and the continuous generatrix is ​​parallel to the central axis, the verticality test can be completed. Therefore, it is not only applicable to circular piles, but also to square piles, elliptical piles, polygonal piles and other piles with continuous generatrixes. There is no need to design different positioning benchmarks for different cross-sectional forms, which significantly improves the versatility and adaptability of the testing device.

[0019] Furthermore, this application obtains the tilt angle of the foundation pile in two mutually perpendicular detection directions, and can obtain the overall spatial verticality of the foundation pile based on the tilt angles in the two directions. This not only accurately reflects the tilt state in a single direction, but also comprehensively reflects the overall spatial posture of the foundation pile, providing accurate detection basis for verticality correction and quality control during construction. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of this application.

[0022] Figure 2 This is an assembly diagram of this application.

[0023] Figure 3 for Figure 2 A schematic diagram of the structure from another angle.

[0024] Figure 4 This is a schematic diagram of the structure of the locking component before it is installed on the clamping mechanism.

[0025] Figure 5 This is a schematic diagram of the structure of the locking component after it is installed on the clamping mechanism.

[0026] Figure 6 This is a schematic diagram of the clamping mechanism used for testing the verticality of square foundation piles in this application.

[0027] Figure 7 This is a schematic diagram of the clamping mechanism used for verticality testing of circular foundation piles in this application.

[0028] Figure 8 This is a diagram showing the results of the verticality test of the square foundation piles used in this application.

[0029] Figure 9 This is a diagram showing the results of the verticality test of the circular foundation piles for this application.

[0030] In the diagram: 100, clamping mechanism; 110, first clamping plate; 111, first clamping plane; 112, first V-shaped clamping part; 113, strip-shaped through hole; 120, second clamping plate; 121, second clamping plane; 122, second V-shaped clamping part; 130, fastening plate; 132, first threaded hole; 133, first guide hole; 140, locking assembly; 141, locking block; 142, locking rod; 143, support block; 144, locking cap; 150, fastener; 151, second threaded hole; 200, perpendicularity detection mechanism; 210, left and right perpendicularity detection assembly; 211, first support arm; 212, second support arm; 213, first roller; 214, second roller; 21 5. First fixed shaft; 216. First bearing; 217. First angle sensor; 218. First traction line; 219. First plumb bob; 220. Front and rear perpendicularity detection assembly; 221. Third support arm; 222. Fourth support arm; 223. Third roller; 224. Fourth roller; 225. Second fixed shaft; 226. Second bearing; 227. Second angle sensor; 228. Second traction line; 229. Second plumb bob; 230. First retainer; 231. First guide post; 232. First fixing bolt; 240. Second retainer; 241. Second guide post; 242. Second fixing bolt; 244. Second guide hole; 300. Square foundation pile; 400. Circular foundation pile. Detailed Implementation

[0031] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Reference Figures 1 to 9 This embodiment discloses a pile verticality testing device, which is applicable to the verticality testing of square piles, circular piles, and other piles whose cross-sectional outer contours can form a continuous generatrix. The pile verticality testing device of this embodiment mainly includes a clamping mechanism 100 and a verticality testing mechanism 200 installed on the clamping mechanism 100. The clamping mechanism 100 is used to stably clamp the pile to the outside and provide an installation reference for the verticality testing mechanism 200. The verticality testing mechanism 200 is used to establish a measurement reference parallel to the central axis of the pile and, in conjunction with the direction of gravity, obtain the inclination angle of the pile in different directions, thereby calculating the pile verticality.

[0033] In this embodiment, refer to Figures 4 to 7The clamping mechanism 100 includes a first clamping plate 110, a second clamping plate 120, a fastening plate 130, a locking assembly 140, and a fastener 150. Both the first clamping plate 110 and the second clamping plate 120 are elongated plate structures. A first clamping plane 111 and a second clamping plane 121 are formed on one side of each plate, and a first V-shaped clamping portion 112 and a second V-shaped clamping portion 122 are formed on the other side. The first clamping plane 111 and the second clamping plane 121 are mainly used to clamp the planar sidewalls of the square foundation pile, allowing the clamping plate to form a larger contact area with the square foundation pile and improving clamping stability. The first V-shaped clamping part 112 and the second V-shaped clamping part 122 are suitable for contacting circular foundation piles or other arc-shaped outer walls. The two inclined surfaces of the V-shaped groove abut against the outer wall of the cylinder to form two-point positioning, ensuring stable clamping of circular foundation piles of different diameters. Therefore, through the cooperative arrangement of the first clamping plane 111, the second clamping plane 121, the first V-shaped clamping part 112, and the second V-shaped clamping part 122, the same clamping mechanism 100 can be applied to foundation piles with different cross-sectional shapes without changing any parts, improving the versatility of the testing device.

[0034] The first clamping plate 110, the second clamping plate 120, and the fastening plate 130 all have strip-shaped through holes 113 at both ends. Each strip-shaped through hole extends along the length of the clamping plate, allowing the locking assembly 140 to be assembled along the position of the strip-shaped through holes. The relative distance between the first clamping plate 110, the second clamping plate 120, and the fastening plate 130 can be adjusted according to the outer contour of different sized foundation piles to meet the installation requirements of foundation piles of different specifications. Preferably, each strip-shaped through hole has the same width, so that the locking assembly 140 can pass through the first clamping plate 110, the second clamping plate 120, and the fastening plate 130 respectively, achieving overall connection.

[0035] In this embodiment, we continue to refer to... Figure 4Two locking components 140 are provided, located at the left and right ends of the clamping mechanism 100 respectively. Each locking component 140 includes an integrally formed locking block 141, locking rod 142, support block 143, and locking cap 144. The locking rod 142 passes through the corresponding slotted through holes of the first clamping plate 110, the second clamping plate 120, and the fastening plate 130, and fixes the locking block 141, support block 143, and locking cap 144 to form a whole. Among them, the locking block 141 is located outside the fastening plate 130, the support block 143 is located between the first clamping plate 110 and the second clamping plate 120, and the locking cap 144 is located outside the first clamping plate 110. The locking block 141 and the support block 143 are both elongated, and their outlines match the slotted through holes, and their width is slightly smaller than the width of the slotted through holes, so that the locking block 141 and the support block 143 can pass smoothly through the slotted through holes to complete the assembly. After the locking assembly 140 passes through the corresponding through hole, the entire locking assembly 140 is rotated approximately 90 degrees around the locking rod 142, so that the length direction of the locking block 141 and the support block 143 is perpendicular to the extension direction of the strip-shaped through hole. At this point, neither the locking block 141 nor the support block 143 can pass through the corresponding through hole again, thus forming axial limits with the fastening plate 130 and the first clamping plate 110 respectively, achieving rapid assembly of the overall frame of the clamping mechanism 100. This structure can complete the frame assembly without the need for welding or complex connectors, which not only has high assembly efficiency but also facilitates on-site disassembly and reuse.

[0036] The fastening plate 130 is located on one side of the second clamping plate 120 and has a first threaded hole 132. The fastener 150 is threadedly connected to the first threaded hole 132. The fastener 150 preferably adopts a screw structure, and its head can gradually press against the second V-shaped clamping part 122 on the outer side of the second clamping plate 120 along the axial direction. When the fastener 150 is rotated, the fastener 150 gradually moves towards the second clamping plate 120, and its head continuously presses against the second V-shaped clamping part 122, causing the second clamping plate 120 to move towards the first clamping plate 110, thereby causing the first clamping plate 110 and the second clamping plate 120 to jointly clamp the outer wall of the foundation pile. Meanwhile, since the fastener 150 is threadedly connected to the fastening plate 130, as the fastener 150 is continuously screwed in, the fastening plate 130 is subjected to a reverse thrust and moves away from the second clamping plate 120, causing the fastening plate 130 to gradually press the locking block 141, further eliminating the assembly gap between the locking assembly 140 and the strip-shaped through hole, so that the entire clamping mechanism 100 forms a stable spatial frame structure. Through the combined action of clamping force and locking force, the clamping mechanism 100 can be firmly fixed to the surface of the foundation pile, providing a stable and reliable installation foundation for subsequent verticality testing.

[0037] Furthermore, the first clamping plate 110, the second clamping plate 120, and the fastening plate 130 together form an integral frame structure. This frame structure maintains a stable posture along the axial direction of the pile after clamping and can support the subsequently installed verticality detection mechanism 200. Since the position of the locking assembly 140 can be adjusted along the strip-shaped through hole, the clamping mechanism 100 is suitable not only for square piles of different cross-sectional sizes but also for circular piles of different diameters. While ensuring clamping stability, it reduces the need to change clamps or configure different specifications of detection devices, improving the adaptability and efficiency of on-site testing. In addition, the entire clamping mechanism 100 is mainly composed of mechanical connecting parts. Each component has a simple structure, is easy to process, and is reliably assembled. This not only reduces manufacturing costs but also facilitates later maintenance and replacement, making it suitable for long-term repeated use in building construction, bridge engineering, port engineering, and various pile foundation construction sites.

[0038] After assembling the clamping mechanism 100, the verticality detection mechanism 200 is installed on the clamping mechanism 100 to detect the inclination state of the foundation pile. Specifically, the verticality detection mechanism 200 includes left and right verticality detection components 210 and front and rear verticality detection components 220. The two sets of verticality detection components are respectively installed on two mutually perpendicular sides of the clamping mechanism 100, and two mutually perpendicular measurement benchmarks are established to obtain the inclination angle of the foundation pile in two orthogonal directions, and finally, the overall verticality of the foundation pile is obtained by combining them. Since the overall structure of the left and right verticality detection components 210 and the front and rear verticality detection components 220 is basically the same, only the installation position and detection direction are different, the left and right verticality detection components 210 will be described in detail first. The front and rear verticality detection components 220 and their corresponding parts adopt the same or similar structure and working principle.

[0039] Specifically, refer to Figures 1 to 3The left-right verticality detection component 210 includes a first support arm 211, a second support arm 212, a first roller 213, a second roller 214, a first fixed shaft 215, a first bearing 216, a first angle sensor 217, a first traction line 218, a first plumb bob 219, and a first retainer 230. The first support arm 211 and the second support arm 212 are rigidly connected to form a whole, forming a preset angle between them, preferably a V-shaped arrangement, so that the first roller 213 and the second roller 214 can be located at different heights on the same side of the pile. When the detection device is installed on the outside of the pile, the first roller 213 and the second roller 214 abut against the corresponding sidewall of the pile and maintain rolling contact at all times. Since the two rollers are located at different positions in the same detection direction, the contact points of the two rollers can jointly determine a measurement baseline extending along the axial direction of the pile. As the detection device moves up and down along the pile, the two rollers always maintain continuous rolling contact with the outer surface of the pile, thereby ensuring that the established measurement baseline is always consistent with the corresponding sidewall of the pile and will not cause significant jumping due to local surface roughness, welds or concrete defects, thus improving the stability and repeatability of the detection process.

[0040] Furthermore, both the first roller 213 and the second roller 214 are mounted on the ends of the first support arm 211 and the second support arm 212 via rolling bearings, allowing the rollers to rotate freely around their respective axes. When the detection device moves along the axial direction of the pile, the first roller 213 and the second roller 214 roll on the outer wall of the pile without generating significant sliding friction, thereby reducing movement resistance and preventing changes in the posture of the detection device due to sliding friction. Simultaneously, after the first roller 213 and the second roller 214 form rolling contact with the pile, they can continuously conform to the outer contour of the pile, allowing the measurement reference to move synchronously with the pile axis, thus enabling continuous detection at different heights without the need to reinstall the detection device.

[0041] Furthermore, a first fixed shaft 215 is fixedly installed at the connection position between the first support arm 211 and the second support arm 212. The first fixed shaft 215 is fixedly installed between the first support arm 211 and the second support arm 212. A first bearing 216 is sleeved on the outside of the first fixed shaft 215 and can rotate around the first fixed shaft 215. A first angle sensor 217 is installed on the rotating part of the first bearing 216. A first traction line 218 is connected to the first angle sensor 217. A first plumb bob 219 is connected to the lower end of the first traction line 218. Since the first plumb bob 219 always remains vertical under the action of gravity, when the clamping mechanism 100 tilts synchronously with the foundation pile, the first support arm 211, the second support arm 212, and the first fixed shaft 215 tilt synchronously, while the first plumb bob 219 remains vertical. This causes the first bearing 216 to rotate relative to the first fixed shaft 215, and drives the first angle sensor 217 installed on the rotating part of the first bearing 216 to rotate relative to it. The first angle sensor 217 detects the relative rotation angle and outputs the tilt angle of the foundation pile in that direction (the first detection direction). Using the first bearing 216 as a rotational support not only ensures that the first angle sensor 217 always has high rotational sensitivity, but also reduces measurement errors caused by mechanical friction, making the angle detection results more stable and reliable.

[0042] To establish a stable gravity reference direction, the lower part of the first angle sensor 217 is fixedly connected to the first traction line 218, and the other end of the first traction line 218 is connected to the first plumb bob 219. The first plumb bob 219 has a preset weight, and its center of gravity is located below the first fixed shaft 215. Under the action of gravity, the first plumb bob 219 always maintains a natural downward state, so the first traction line 218 always points in the direction of gravity. Since the first angle sensor 217 is fixedly connected to the first traction line 218, the first angle sensor 217 can sense the relative angle between itself and the direction of gravity in real time. When the first support arm 211 and the second support arm 212 tilt with the foundation pile, the first fixed shaft 215 and the first bearing 216 simultaneously change their posture with the detection device, while the first plumb bob 219 remains vertical, so that a corresponding angle change is formed between the first angle sensor 217 and the first plumb bob 219. Based on this, the first angle sensor 217 outputs the tilt angle data in the left and right directions. Since the direction of gravity is not affected by the inclination of the foundation pile, the first plumb bob 219 always serves as a stable gravity reference, while the measurement reference established by the first roller 213 and the second roller 214 changes synchronously with the foundation pile. The angle formed between the two can truly reflect the degree of inclination of the foundation pile in the left and right directions.

[0043] To ensure the rapid installation and disassembly of the left-right perpendicularity detection component 210, and to guarantee consistent positional accuracy during each installation, this embodiment further includes a first retainer 230. The first retainer 230 is fixedly connected to the first support arm 211 and forms a whole with the entire left-right perpendicularity detection component 210. A first guide post 231 is fixedly provided on one side of the first retainer 230, and a first guide hole 133 is provided at a corresponding position on the fastening plate 130. When the left-right perpendicularity detection component 210 is installed into the clamping mechanism 100, the first guide post 231 is first inserted into the first guide hole 133, achieving rapid guiding and positioning between the left-right perpendicularity detection component 210 and the clamping mechanism 100. Subsequently, the first fixing bolt 232 on the first retainer 230 is threadedly connected to the second threaded hole 151 at the tail end of the fastener 150. After tightening the first fixing bolt 232, the left-right perpendicularity detection component 210 is reliably fixed to the outside of the fastening plate 130. The installation method using guide posts and bolt locking not only avoids positional shifts during installation, but also ensures that the testing components can be restored to the same installation position after each disassembly and assembly, thus improving the consistency of repeated testing.

[0044] Corresponding to the left-right perpendicularity detection component 210, the front-back perpendicularity detection component 220 includes a third support arm 221, a fourth support arm 222, a third roller 223, a fourth roller 224, a second fixed shaft 225, a second bearing 226, a second angle sensor 227, a second traction line 228, a second plumb bob 229, and a second retainer 240. The third support arm 221 and the fourth support arm 222 are fixedly connected to form a whole. The third roller 223 and the fourth roller 224 are respectively installed at the ends of their respective support arms, and their structure, installation method, and working principle are the same as those of the first roller 213 and the second roller 214. The second fixed shaft 225, the second bearing 226, the second angle sensor 227, the second traction line 228, and the second plumb bob 229 together establish a gravity measurement benchmark in the front-back direction (second detection direction), and their working principle is consistent with that of the left-right perpendicularity detection component 210. The second retainer 240 is fixedly installed on the third support arm 221 and inserted into the second guide hole 244 corresponding to the support block 143 through the second guide post 241. Then, it is fixedly connected to the threaded hole on the support block 143 by the second fixing bolt 242, so that the front and rear perpendicularity detection component 220 is reliably installed on the other side of the clamping mechanism 100.

[0045] At this point, the clamping mechanism 100 and the verticality detection mechanism 200 are fully assembled. The two sets of verticality detection components are located in two mutually perpendicular detection directions, and measurement and gravity references are established in corresponding directions, providing a stable and reliable structural foundation for subsequent installation and testing on square and circular piles. Subsequently, the installation and testing process of square piles will be used as an example to explain in detail how this embodiment uses rollers to establish a measurement reference parallel to the central axis of the pile, and how the pile verticality is obtained through an angle sensor.

[0046] After the clamping mechanism 100 and the verticality detection mechanism 200 are assembled, the corresponding installation method can be selected according to the cross-sectional shape of the pile to be tested.

[0047] Reference Figure 8 This embodiment first takes a square foundation pile 300 as an example to explain in detail the installation process and detection principle of the foundation pile verticality detection device of this application.

[0048] During installation, firstly, adjust the relative positions of the first clamping plate 110, the second clamping plate 120, and the fastening plate 130 according to the cross-sectional dimensions of the square foundation pile 300, so that the clamping mechanism 100 forms an installation space that can accommodate the square foundation pile 300. Since the locking assembly 140 can move along the strip-shaped through holes 113 on the first clamping plate 110, the second clamping plate 120, and the fastening plate 130, the opening size of the entire clamping mechanism 100 can be adjusted according to the side length of square foundation piles 300 of different specifications, making the device applicable to square foundation piles of different sizes and improving the adaptability of on-site testing. After the clamping mechanism 100 is adjusted, slide the entire testing device downwards along the axial direction of the square foundation pile 300 from the top, so that the square foundation pile 300 is located within the frame space formed by the first clamping plate 110, the second clamping plate 120, and the fastening plate 130.

[0049] During the installation process, since the fasteners 150 are not yet tightened, a suitable gap is maintained between the first clamping plate 110, the second clamping plate 120, and the square foundation pile 300, allowing the entire clamping mechanism 100 to slide freely along the square foundation pile 300. Simultaneously, the left and right verticality detection components 210 and the front and rear verticality detection components 220 are located in two mutually perpendicular detection directions of the square foundation pile 300. Specifically, the first roller 213 and the second roller 214 respectively roll in contact with the outer surface of one side of the square foundation pile 300, while the third roller 223 and the fourth roller 224 respectively roll in contact with the outer surface of the other adjacent side. Because all four rollers use rolling contact, the entire detection device can move continuously up and down along the axial direction of the square foundation pile 300 without significant changes in its posture due to sliding friction. This also avoids scratches on the surface of the square foundation pile 300, improving the stability and efficiency of the detection process.

[0050] After adjusting the detection device to the predetermined detection height, rotate the fastener 150 so that it gradually moves along the threaded hole on the fastening plate 130 toward the second clamping plate 120. As the fastener 150 is continuously screwed in, its end gradually presses against the second V-shaped clamping part 122 on the second clamping plate 120, and pushes the second clamping plate 120 toward the first clamping plate 110, so that the first clamping plate 110 and the second clamping plate 120 respectively abut against the two opposite sides of the square foundation pile 300, and gradually form a stable clamping force. At the same time, since a threaded pair is formed between the fastener 150 and the fastening plate 130, when the fastener 150 continues to tighten, it will also apply a reverse force to the fastening plate 130, causing the fastening plate 130 to move slightly away from the second clamping plate 120, and further press the locking block 141 in the locking assembly 140, so that the locking block 141 and the fastening plate 130 form a reliable abutment, eliminating the possible assembly gap between the locking assembly 140 and the strip through hole 113, thereby further improving the overall rigidity of the entire clamping mechanism 100, and ensuring that each perpendicularity detection component maintains a stable installation posture during the detection process.

[0051] After clamping, the left and right verticality detection components 210 and the front and rear verticality detection components 220 are fixed to the outside of the square pile 300 along with the clamping mechanism 100. Since the first roller 213 and the second roller 214 always simultaneously abut against different positions on the same side of the square pile 300, the line connecting the centers of the two rollers always remains parallel to that side. For a square pile, each side extends continuously along the pile's axial direction, and each side is parallel to the central axis of the square pile 300. Therefore, the measurement reference jointly established by the first roller 213 and the second roller 214 also always remains parallel to the central axis of the square pile 300. In other words, this embodiment does not directly use the central axis of the square pile 300 as the detection object, but indirectly establishes a measurement reference parallel to the central axis using the geometric reference formed by the continuous rolling contact between the first roller 213 and the second roller 214 and the side of the square pile 300. This avoids the positioning difficulties caused by finding the center position of the pile in traditional detection methods and improves on-site detection efficiency.

[0052] Meanwhile, the third roller 223 and the fourth roller 224 also abut against different positions on another adjacent side of the square pile 300. The measurement reference established by the third roller 223 and the fourth roller 224 is always parallel to the central axis of the square pile 300, but it corresponds to another orthogonal detection direction. Therefore, the two sets of rollers establish two mutually perpendicular measurement references in the left-right direction and the front-back direction, both of which are parallel to the central axis of the pile, providing a reliable geometric basis for subsequently obtaining the spatial attitude of the pile.

[0053] Since the clamping mechanism 100, the left and right verticality detection components 210, and the front and rear verticality detection components 220 are all firmly installed on the same frame structure, when the square pile 300 tilts, the entire detection device will change its posture synchronously with the square pile 300. That is, the measurement reference established by the two sets of rollers will also tilt synchronously with the pile. However, during the overall tilting process of the detection device, the first plumb bob 219 and the second plumb bob 229 always remain in a natural vertical state under the action of gravity, and their directions do not change with the square pile 300. Therefore, the first angle sensor 217 detects the change in the angle between the measurement reference established by the rollers and the direction of gravity, and the second angle sensor 227 detects the change in the angle between the measurement reference in another orthogonal direction and the direction of gravity. Since the direction of gravity always remains constant, and the measurement reference established by the rollers always remains parallel to the central axis of the square pile 300, the two angle sensors actually detect the tilt angles of the square pile 300 in the left and right and front and rear directions, respectively.

[0054] Furthermore, when the square pile 300 is in an ideal vertical state, the measurement references established by the two sets of rollers maintain a preset correspondence with the direction of gravity. At this time, the first angle sensor 217 and the second angle sensor 227 output the corresponding reference angle values ​​respectively. When the square pile 300 tilts due to construction deviation, the measurement references established by the rollers will deflect synchronously with the pile, while the first plumb bob 219 and the second plumb bob 229 remain vertical. Therefore, the two sets of angle sensors detect the angle changes in the corresponding directions respectively. Based on these angle changes, the tilt data of the square pile 300 in the left-right and front-back directions can be obtained respectively, and the overall verticality of the pile can be further calculated, realizing rapid detection of the spatial attitude of the square pile 300.

[0055] Therefore, this embodiment does not directly measure the central axis of the pile. Instead, it establishes a measurement benchmark parallel to the pile's central axis through continuous rolling contact between a roller and the pile's outer surface. A stable gravity benchmark is then established using a plumb bob, and the relative angle between the two benchmarks is measured in real time using an angle sensor, thereby indirectly obtaining the pile's verticality. This detection method eliminates the need to find a center point on the pile or rely on external measuring equipment such as a total station. The verticality detection in two orthogonal directions can be completed simply by installing the detection device on the pile surface. This not only improves on-site detection efficiency but also ensures good stability and repeatability of the measurement results.

[0056] Furthermore, in this application, the left-right perpendicularity detection component 210 and the front-back perpendicularity detection component 220 correspond to two mutually perpendicular detection directions of the foundation pile, thus enabling the acquisition of the pile's tilt state in two orthogonal directions. When the foundation pile tilts only along the left-right direction, the first angle sensor 217 outputs the corresponding first tilt angle, while the second angle sensor 227 maintains the corresponding reference value; when the foundation pile tilts only along the front-back direction, the second angle sensor 227 outputs the corresponding second tilt angle, while the first angle sensor 217 maintains the corresponding reference value; when the foundation pile tilts along any spatial direction, since any spatial tilt can be decomposed into tilt components in two mutually perpendicular directions, the first angle sensor 217 and the second angle sensor 227 respectively output the first tilt angle and the second tilt angle in the corresponding direction, and the two sets of detection data jointly characterize the spatial attitude of the foundation pile.

[0057] Specifically, the first angle sensor 217 detects the first tilt angle α formed between the first measuring reference and the direction of gravity. This first tilt angle α is the tilt angle of the pile in the first detection direction. The second angle sensor 227 detects the second tilt angle β formed between the second measuring reference and the direction of gravity. This second tilt angle β is the tilt angle of the pile in the second detection direction. Since the first and second measuring references are parallel to the central axis of the pile and correspond to two mutually perpendicular detection directions, the verticality of the pile in the left-right and front-back directions can be obtained based on the first tilt angle α and the second tilt angle β, respectively. When it is necessary to obtain the overall spatial verticality of the pile, a comprehensive calculation can be performed based on the first tilt angle α and the second tilt angle β to obtain the overall spatial tilt angle of the pile relative to the direction of gravity. For example, trigonometric functions can be used to calculate the overall spatial tilt angle.

[0058] The above embodiments mainly use square piles 300 as the testing object. In fact, the clamping mechanism 100 of this application can be applied not only to square piles 300, but also to circular piles 400 and other piles with continuous outer contours.

[0059] Therefore, refer to Figure 9 The following section, using the circular foundation pile 400 as an example, further explains the installation method and detection principle of the detection device in this application.

[0060] When the object to be tested is a circular pile 400, the relative positions of the first clamping plate 110, the second clamping plate 120, and the fastening plate 130 are first adjusted according to the outer diameter of the circular pile 400, so that the clamping mechanism 100 forms an installation space that can accommodate the circular pile 400. Then, the entire testing device is axially fitted from the top of the circular pile 400, allowing the circular pile 400 to enter the frame formed by the clamping mechanism 100. Since the fasteners 150 are not yet locked at this time, the entire testing device can still move freely up and down along the axial direction of the circular pile 400 to select the location to be tested.

[0061] Unlike when testing square foundation piles 300, during the testing of circular foundation piles 400, the first V-shaped clamping portion 112 and the second V-shaped clamping portion 122 on the first clamping plate 110 and the second clamping plate 120 respectively form contact with the outer circumference of the circular foundation pile 400. Since the V-shaped clamping portion has two intersecting inclined surfaces, it can form two-point contact with the outer wall of the circular foundation pile 400 respectively, thereby automatically restricting the circular foundation pile 400 to the central area of ​​the clamping mechanism 100. When the fastener 150 is rotated, the second clamping plate 120 gradually moves towards the first clamping plate 110, so that the first clamping plate 110 and the second clamping plate 120 together clamp the outer wall of the circular foundation pile 400, while the fastening plate 130 presses the locking block 141, finally making the entire clamping mechanism 100 stably fixed to the outside of the circular foundation pile 400. Since the first V-shaped clamping part 112 and the second V-shaped clamping part 122 can automatically adapt to the outer contour of cylinders of different diameters, it is not necessary to configure different types of clamps for different specifications of circular foundation piles 400 to complete reliable clamping, thereby improving the versatility of the testing device.

[0062] After clamping, the left and right perpendicularity detection components 210 and the front and rear perpendicularity detection components 220 are fixed together with the clamping mechanism 100 to the outside of the circular base pile 400. Specifically, the first roller 213 and the second roller 214 continuously roll in contact with the outer circumference of the circular base pile 400, while the third roller 223 and the fourth roller 224 similarly maintain rolling contact with the outer circumference of the circular base pile 400 at another corresponding position. Since each roller can rotate freely around its own axis, the detection device maintains a rolling state throughout its up-and-down movement along the axial direction of the circular base pile 400 without significant slippage, thus ensuring smooth movement of the detection device and maintaining a stable fit with the outer contour of the circular base pile 400.

[0063] For the circular pile 400, its outer surface does not have a planar sidewall similar to that of the square pile 300. Therefore, this application does not use a plane as a measurement reference, but rather establishes a measurement reference by utilizing the continuous contact relationship between the rollers and the outer surface of the circular pile 400. Specifically, the first roller 213 and the second roller 214 are located at different axial positions on the same side of the circular pile 400. When the two rollers simultaneously abut against the outer surface of the cylinder, the contact points of the two rollers are continuously distributed along the axial direction of the cylinder, thereby forming a continuous contact trajectory. Since any generatrix of the circular pile 400 extends axially, and all generatrixes are parallel to the central axis of the circular pile 400, the contact trajectory formed by the first roller 213 and the second roller 214 during rolling actually corresponds to a generatrix on the outer surface of the circular pile 400. As the detection device moves up and down along the circular pile 400, the two rollers always roll along the same generatrix, thus ensuring that the established measurement benchmark remains parallel to the central axis of the circular pile 400, and that the direction of the measurement benchmark is not affected by the curvature change of the outer contour of the circular pile 400.

[0064] Similarly, when the third roller 223 and the fourth roller 224 roll at another corresponding position on the circular pile 400, another generatrix measurement reference parallel to the central axis of the circular pile 400 is established. Since the two sets of perpendicularity detection components are installed in two mutually perpendicular detection directions, measurement references in corresponding directions can be established respectively, and the tilt state of the circular pile 400 in two orthogonal directions can be detected respectively. It should be understood that, for the circular pile 400, although the generatrixes at different positions are distributed at different circumferential positions, each generatrix is ​​parallel to each other and parallel to the central axis of the circular pile 400. Therefore, regardless of where the rollers actually contact the outer surface of the circular pile 400, as long as the two rollers maintain continuous contact and roll axially, a measurement reference parallel to the central axis of the circular pile 400 can be stably established.

[0065] During the testing process, when the circular pile 400 remains vertical, the two sets of generatrix measurement references established by the rollers maintain their preset postures. The first plumb bob 219 and the second plumb bob 229 remain naturally vertical under gravity. Therefore, the first angle sensor 217 and the second angle sensor 227 output their corresponding initial reference angles. When the circular pile 400 tilts, the generatrix measurement references established by the rollers tilt synchronously with the circular pile 400. The first plumb bob 219 and the second plumb bob 229 remain vertical due to gravity. Therefore, the first angle sensor 217 and the second angle sensor 227 detect the angle changes in their respective directions and convert the angle changes into electrical signals. Since the generatrix established by the rollers is always parallel to the central axis of the circular pile 400, the angle changes detected by the angle sensors accurately reflect the degree of tilt of the central axis of the circular pile 400 relative to the direction of gravity. Based on this, the verticality data of the circular pile 400 in the left-right and front-back directions can be obtained.

[0066] Therefore, regardless of whether the object of inspection is a square pile 300 or a circular pile 400, this application does not directly measure the central axis of the pile. Instead, it uses a roller and the outer contour of the pile to establish a geometric measurement benchmark parallel to the central axis of the pile, and then uses a plumb bob to form a stable gravity benchmark. An angle sensor measures the change in the angle between the two in real time, thereby indirectly obtaining the verticality of the pile. Specifically, for the square pile 300, the measurement benchmark is formed by the roller conforming to the sidewall of the plane; for the circular pile 400, the measurement benchmark is formed by the roller rolling along the generatrix of the pile.

[0067] As can be seen from the above embodiments, the clamping mechanism 100 in this application is mainly used to establish a stable and reliable connection between the entire testing device and the foundation pile, while the verticality testing mechanism 200 is responsible for establishing the measurement benchmark and completing the angle detection. The two cooperate with each other to complete the detection of the verticality of the foundation pile.

[0068] Meanwhile, the left and right verticality detection components 210 and the front and rear verticality detection components 220 are respectively installed in two mutually perpendicular detection directions of the clamping mechanism 100. The two sets of verticality detection components independently establish measurement benchmarks in their respective directions and output tilt angle data in their respective directions. Among them, the first roller 213, the second roller 214, the third roller 223, and the fourth roller 224 all adopt a rolling contact method to maintain continuous contact with the outer surface of the pile, so that the entire detection device can move continuously along the axial direction of the pile without repeatedly disassembling and assembling the detection device at different detection heights. Since the rollers are always in contact with the outer contour of the pile, no matter where the detection device moves to on the pile, the measurement benchmark established by the rollers always remains parallel to the central axis of the pile, thereby ensuring the consistency and repeatability of the measurement data obtained at different detection heights, which is conducive to quickly completing continuous detection at multiple height positions on the construction site.

[0069] Furthermore, this application does not employ the traditional method of directly locating the centerline of the pile, but instead fully utilizes the geometric characteristics of the pile's outer contour to establish a measurement benchmark. For the square pile 300, its side surface is already parallel to the pile's centerline. Therefore, by having the first roller 213 and the second roller 214, and the third roller 223 and the fourth roller 224 respectively contact the corresponding side surfaces, a measurement benchmark parallel to the pile's centerline can be established. For the circular pile 400, all generatrices on its cylindrical outer surface are parallel to the centerline. Therefore, when the two rollers roll continuously along the same generatrice direction, a measurement benchmark parallel to the centerline can also be established. Thus, this application establishes the measurement benchmark based on the geometric characteristics of the pile's outer contour, rather than relying on additionally finding the pile's center position or setting a dedicated positioning benchmark. This effectively reduces the difficulty of on-site positioning, improves testing efficiency, and avoids the cumulative errors caused by manually searching for the center position.

[0070] On the other hand, a gravity detection unit in the left-right direction is formed by the first fixed shaft 215, the first bearing 216, the first angle sensor 217, the first traction line 218, and the first plumb bob 219, while a gravity detection unit in the front-back direction is formed by the second fixed shaft 225, the second bearing 226, the second angle sensor 227, the second traction line 228, and the second plumb bob 229. The first bearing 216 and the second bearing 226 provide low-friction rotational support for their respective angle sensors, enabling them to sensitively respond to changes in the measurement reference posture. The first plumb bob 219 and the second plumb bob 229 remain naturally vertical, continuously providing a stable gravity reference direction. When the foundation pile tilts, the measurement reference established by the rollers deflects synchronously with the foundation pile, while the two sets of plumb bobs remain vertical. Therefore, the angle sensor actually detects the change in the angle between the measurement reference and the gravity reference in real time. Since the measurement benchmark is always parallel to the central axis of the pile, the obtained angle change can truly reflect the inclination of the central axis of the pile relative to the direction of gravity, thus achieving accurate measurement of the verticality of the pile.

[0071] Furthermore, since the left-right verticality detection component 210 and the front-back verticality detection component 220 correspond to two mutually perpendicular detection directions, the two sets of angle sensors can output the tilt angles in the left-right and front-back directions, respectively. When the pile tilts only in one direction, the angle sensor in that direction outputs an angle change, while the angle sensor in the other direction maintains its corresponding reference value. When the pile tilts in both directions simultaneously, the two sets of angle sensors output tilt data in their respective directions. By combining the two sets of detection results, the overall spatial attitude of the pile can be accurately reflected, thus avoiding the problem that traditional single-direction detection devices cannot fully reflect the actual vertical state of the pile, and improving the completeness and reliability of the pile verticality detection results.

[0072] Furthermore, it should be understood that the measurement benchmark established in this application is not based on the specific cross-sectional shape of the pile, but rather on the continuous axial geometric characteristics of the pile's outer contour. In this application, the first roller 213 and the second roller 214 are installed at the ends of the first support arm 211 and the second support arm 212, and maintain continuous rolling contact with the outer contour of the pile to be measured; the third roller 223 and the fourth roller 224 are installed at the ends of the third support arm 221 and the fourth support arm 222, and maintain continuous rolling contact with the outer contour of the pile in another detection direction. When the clamping mechanism 100 stably installs the entire detection device on the outside of the pile, the first roller 213, the second roller 214, the third roller 223, and the fourth roller 224 can all roll continuously along the pile's axial direction, thereby establishing two mutually perpendicular measurement benchmarks.

[0073] It should be noted that the continuous generatrix referred to in this application is not limited to the generatrix in the geometric sense of a cylinder, but rather refers to the outer contour geometric reference that can extend continuously along the axial direction of the pile and allow for continuous rolling contact by rollers. For a square pile 300, its continuous generatrix can be formed by the corresponding planar sidewall; for a circular pile 400, its continuous generatrix can be formed by any generatrix on the outer surface of the circular pile 400; for piles with elliptical, polygonal, or other irregular cross-sections, as long as their outer contour can form a rolling contact trajectory that extends continuously along the axial direction, and this trajectory maintains a definite geometric relationship with the central axis of the pile, preferably a parallel relationship, it can all be used as the measurement reference of this application.

[0074] Therefore, regardless of whether the object of inspection is a square pile 300, a circular pile 400, or other piles with a continuous axial outer contour, as long as the roller can continuously roll along its outer contour and establish a measurement benchmark with a definite geometric relationship to the central axis, the same verticality inspection mechanism 200, the same inspection steps, and the same inspection principle as in this application can be used to complete the verticality inspection. This application realizes the transformation from directly measuring the central axis to measuring the geometric benchmark of the outer contour, enabling different piles with continuous axial outer contours to share the same inspection principle, significantly improving the versatility and adaptability of the inspection device.

[0075] In summary, this embodiment utilizes the coordinated operation of the clamping mechanism 100, the left and right verticality detection components 210, and the front and rear verticality detection components 220 to establish a measurement benchmark parallel to the central axis of the pile using rollers, a stable gravity benchmark using a plumb bob, and real-time detection of the relative angle between the two using an angle sensor. This enables the verticality detection of square piles 300, circular piles 400, and other piles with continuous outer contours. Throughout the entire detection process, no external measuring equipment such as total stations or theodolites is required, nor is it necessary to find a center point on the pile surface or establish additional measurement benchmarks. Simply installing the detection device on the outside of the pile allows for rapid verticality detection in two orthogonal directions, improving on-site detection efficiency and ensuring the accuracy and repeatability of the detection results.

[0076] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0077] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pile verticality testing device, characterized in that, include: Clamping mechanism (100); The left and right verticality detection component (210) and the front and rear verticality detection component (220) are installed on the clamping mechanism (100). The left and right verticality detection component (210) includes a first support arm (211), a second support arm (212), a first roller (213), a second roller (214), and a first angle sensor (217). The first roller (213) and the second roller (214) respectively maintain rolling contact with the outer contour of the foundation pile at axial intervals to establish a first measurement reference. The first measurement reference is parallel to the central axis of the foundation pile. The first angle sensor (217) is used to detect the first tilt angle of the first measurement reference relative to the direction of gravity. The front and rear verticality detection component (220) includes a third support arm (221), a fourth support arm (222), a third roller (223), a fourth roller (224), and a second angle sensor (227). The third roller (223) and the fourth roller (224) respectively maintain rolling contact with the outer contour of the foundation pile at axial intervals to establish a second measurement reference. The second measurement reference is parallel to the central axis of the foundation pile. The second angle sensor (227) is used to detect the second tilt angle of the second measurement reference relative to the direction of gravity. The verticality of the foundation pile is obtained based on the first tilt angle and the second tilt angle.

2. The pile verticality testing device according to claim 1, characterized in that, The first roller (213) and the second roller (214) respectively maintain rolling contact with two axially spaced positions on the same continuous generatrix of the foundation pile to establish the first measurement reference; the third roller (223) and the fourth roller (224) respectively maintain rolling contact with two axially spaced positions on another continuous generatrix of the foundation pile to establish the second measurement reference.

3. The pile verticality detection device according to claim 2, characterized in that, The first measurement reference and the second measurement reference are respectively parallel to the central axis of the pile, so that the first tilt angle and the second tilt angle respectively correspond to the tilt angle of the central axis of the pile in two mutually perpendicular detection directions.

4. The pile verticality testing device according to claim 1, characterized in that, The first angle sensor (217) is used to detect the first tilt angle of the pile in the first detection direction, and the second angle sensor (227) is used to detect the second tilt angle of the pile in the second detection direction. The first tilt angle and the second tilt angle together characterize the spatial tilt posture of the pile.

5. The pile verticality testing device according to claim 1, characterized in that, The first roller (213) and the second roller (214) maintain contact with the outer contour of the pile during rolling to maintain the first measurement reference; the third roller (223) and the fourth roller (224) maintain contact with the outer contour of the pile during rolling to maintain the second measurement reference.

6. The pile verticality testing device according to claim 2, characterized in that, The foundation pile is a circular foundation pile, a square foundation pile, an elliptical foundation pile, a polygonal foundation pile, or other columnar member with a continuous generatrix and the continuous generatrix being parallel to its central axis.

7. The pile verticality testing device according to claim 1, characterized in that, The clamping mechanism (100) includes a first clamping plate (110), a second clamping plate (120), a fastening plate (130), a locking assembly (140), and a fastener (150). The first clamping plate (110) and the second clamping plate (120) are respectively disposed on opposite sides of the foundation pile. The fastening plate (130) is connected to the first clamping plate (110) and the second clamping plate (120), and the clamping state of the clamping mechanism (100) is adjusted by the locking assembly (140).

8. The pile verticality testing device according to claim 7, characterized in that, The first clamping plate (110) has a first clamping plane (111) and a first V-shaped clamping part (112) formed on both sides, and the second clamping plate (120) has a second clamping plane (121) and a second V-shaped clamping part (122) formed on both sides; wherein, the first clamping plane (111) and the second clamping plane (121) cooperate to form a square foundation pile clamping position, and the first V-shaped clamping part (112) and the second V-shaped clamping part (122) cooperate to form a circular foundation pile clamping position.

9. The pile verticality testing device according to claim 7, characterized in that, The first clamping plate (110), the second clamping plate (120) and the fastening plate (130) are all provided with a strip-shaped through hole (113) extending along the length direction. The locking component (140) passes through the strip-shaped through hole (113) and can move along the strip-shaped through hole (113) to adjust the clamping size of the clamping mechanism (100). After the locking component (140) rotates, it abuts against the hole wall of the strip-shaped through hole (113) to restrict the movement of the locking component (140) along the strip-shaped through hole (113).

10. The pile verticality testing device according to claim 9, characterized in that, The fastener (150) is threadedly engaged with the fastening plate (130). When the fastener (150) is rotated, the fastener (150) drives the second clamping plate (120) to move toward the first clamping plate (110), so that the first clamping plate (110) and the second clamping plate (120) clamp the foundation pile. At the same time, the fastening plate (130) moves in the opposite direction to the second clamping plate (120) under the action of the thread and presses the locking assembly (140), so that the locking assembly (140) and the strip through hole (113) form a pre-tight fit.

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