A pile testing auxiliary guidance device based on high strain method

Abstract

This invention relates to the field of pile foundation testing technology, specifically to an auxiliary guiding device for pile foundation testing based on the high-strain method, comprising a support mechanism, a leveling mechanism, and a guiding mechanism. The support mechanism includes a support base, support legs, and moving wheels; the support base is distributed left and right, and has a through hole in the center. The leveling mechanism includes a fixing block, a fastening clamp, a fixing rod, a leveling component, and a foot pad; the foot pad has a disc-shaped structure and is connected to the fixing rod via the leveling component. The guiding mechanism includes a calibration disc, a drive screw, a guide rod, a drive motor, a guide cylinder, and a connecting lug; the calibration disc has a cross mark in the center and is connected to the through hole via a connecting structure; the guide cylinder is coaxially arranged with the calibration disc and has a circular structure adapted to an impact hammer. This invention has a simple manufacturing process, high cost-effectiveness, and is easy to move and level, ensuring the stability of the auxiliary guiding device's foundation. It saves resources and is applicable to pile foundation testing needs in multiple scenarios and for various specifications, making it more practical.

Description

Technical Field

[0001] This invention relates to the field of pile testing technology, and specifically to an auxiliary guiding device for pile testing based on the high strain method. Background Technology

[0002] High-strain testing is a method for evaluating the vertical compressive bearing capacity and integrity of a single pile. During the experiment, a heavy hammer is used to impact the top of the pile, and the velocity and force time-history curves at the pile top are measured and analyzed using wave theory. Specifically, by applying a high-energy impact to the pile top, a large strain is generated, allowing for a more in-depth assessment of the pile's bearing capacity and integrity. This method can detect minute defects in the pile body, such as cracks and voids. High-strain testing is suitable for pile foundations requiring testing of pile integrity and verification of bearing capacity, combining the advantages of low-strain testing and static load testing. In existing pile testing techniques, a suspension rope is typically used to drive a heavy hammer for impact operation. However, the movement of both the cable and the hammer is uncertain, easily leading to a deviation between the hammer and the pile under test, which in turn reduces the effectiveness and quality of the pile testing.

[0003] The present invention relates to a testing device and method for high strain testing of foundation piles, as described in the publicly available patent "CN 113404095 B, Testing Equipment and Method for High Strain Testing of Foundation Pile". The testing equipment includes: a force application component comprising a testing hammer, a frame, and a lifting device; an auxiliary positioning component, fitted onto the outside of the foundation pile to be tested, including a positioning bracket for the foundation pile and a guide cylinder for the testing hammer positioned above the center of the positioning bracket; and a sensor component, mounted on the foundation pile to be tested, which collects force and velocity signals of the foundation pile when it is impacted by the testing hammer. The testing method includes: foundation pile pretreatment, sensor component positioning and installation, self-positioning of the auxiliary positioning component, release of the testing hammer by the lifting device, detection and transmission of signals by the sensor component, and analysis of measured curve fitting using a high strain gauge to ultimately determine whether the design requirements are met. This invention utilizes an auxiliary positioning component to achieve self-positioning of the testing hammer's impact position, ensuring the accuracy of the testing hammer, reducing testing risks, and improving testing accuracy.

[0004] While the existing pile testing equipment mentioned above has solved the auxiliary guiding effect of the falling hammer to some extent, its positioning structure adjustment is relatively complex, its manufacturing cost is high, and the structure and equipment are bulky and inconvenient to move. Since piles are usually located in remote and isolated areas, the pile testing equipment often needs to be moved from one pile to the next on the construction site. The existing pile testing equipment suffers from inconvenience in movement and the inability to perform support and leveling operations, resulting in reduced pile testing efficiency. Furthermore, the existing pile testing equipment uses a structure where the guide tube of the testing hammer extends upwards. Different specifications and models of piles have different vertical compressive bearing capacity standards, meaning different hammer lifting heights, and thus different guide tube heights. The existing pile testing equipment uses a single guide tube structure, which cannot meet the operational needs of multi-scenario and multi-specification pile testing. Setting the guide tube structure too high also leads to resource waste, inconvenience in carrying, and is time-consuming and labor-intensive. Summary of the Invention

[0005] To address the shortcomings and deficiencies of existing pile testing guidance structures, this invention provides a pile testing auxiliary guidance device based on the high strain method. This device features a reasonable structural design, simple manufacturing process, high cost-effectiveness, easy mobility and horizontal adjustment to ensure the stability of the auxiliary guidance device foundation, resource conservation, applicability to pile testing needs in multiple scenarios and for various specifications, and improved auxiliary guidance effect and accuracy of pile testing.

[0006] The present invention achieves the above objectives by adopting the following technical solution:

[0007] A pile foundation testing auxiliary guiding device based on the high strain method includes a support mechanism, a leveling mechanism, and a guiding mechanism. The support mechanism includes a support base, support legs, and movable wheels. The support base is distributed horizontally and has a through hole in the middle. The support legs are vertically distributed and one end is fixed to the support base by bolts. The movable wheels are mounted on the support legs via brackets. The leveling mechanism includes a fixing block, a fastening clamp, a fixing rod, a leveling component, and a pad. The fixing block is located on the support base, and the fastening clamp is located on the support base and inside the fixing block. The cross-section of the fastening clamp is Y-shaped. In the initial state, one side of the fixing rod is rotatably connected to the fixing block, and the other side is locked to the fastening clamp. The pad has a disc-shaped structure and is connected to the fixing rod via the leveling component. The guiding mechanism includes a calibration disc, a drive screw, a guide rod, a drive motor, a guide cylinder, and a connecting lug. The calibration disc has a central... The support has a cross mark and is movably connected to the side wall of the through hole via a connecting structure. The drive screw is vertically distributed on the support base and is rotatable but not movable relative to the support base via a bearing. The drive motor is mounted on the bottom surface of the support base via a bracket, and its output shaft is connected to the drive screw. The guide rod is vertically distributed on the support base and is symmetrically distributed with the drive screw. The guide cylinder is coaxially arranged with the calibration disk and is located above the calibration disk. The guide cylinder is a circular structure adapted to the impact hammer. There are two symmetrically distributed connecting lugs on the left and right sides, both of which are located on the guide cylinder and are integrally formed. The drive screw passes through the left connecting lug, and the guide rod passes through the right connecting lug. The drive screw and the left connecting lug are threadedly connected, and the guide rod and the right connecting lug are slidably connected.

[0008] As a preferred technical solution, the movable wheel is a universal wheel with a braking function.

[0009] A further preferred technical solution is that a limiting plate is also provided on the outside of the fixing block, and the two are fixed together by welding.

[0010] In a further preferred embodiment, the support legs and the leveling mechanism are four sets that are matched, installed together, and symmetrically distributed.

[0011] A further preferred technical solution is that the leveling component includes a first lead screw, a second lead screw, a rotating sleeve, and a bubble level; the top end of the first lead screw is fixedly installed on a fixed rod; the second lead screw is vertically distributed and its bottom end is connected to the pad foot through a connecting rod; the threads of the first lead screw and the second lead screw have opposite directions; the rotating sleeve is disposed between the first lead screw and the second lead screw, and the three are an integral structure, so that when the rotating sleeve rotates clockwise, the first lead screw and the second lead screw move away from each other; the bubble level is disposed on a support base.

[0012] As a preferred technical solution, the calibration disk includes a fixing ring and an indicator disk; the indicator disk can be made of either transparent glass or transparent plastic; the inner wall of the fixing ring is clamped to the indicator disk, and the two form an integral structure.

[0013] In a further preferred embodiment, the connection structure comprises multiple sets evenly distributed in a ring, and each set of the connection structure includes a strong magnet mother block and a strong magnet daughter block; the strong magnet mother block is disposed on the inner sidewall of the through hole, and the strong magnet daughter block is disposed on the outer sidewall of the fixing ring, with the strong magnet mother block and the strong magnet daughter block being matched and installed.

[0014] In a further preferred embodiment, the drive screw and the guide rod are a matched set; the support base is also provided with symmetrically distributed reinforcing ribs, the reinforcing ribs are L-shaped, and the bottom end of the left reinforcing rib is fixed to the support base by welding, and the top end is connected to the drive screw by bearing; the bottom end of the left reinforcing rib is fixed to the support base, and the top end is fixed to the top end of the guide rod by welding.

[0015] A further preferred technical solution is that the guide rod is also provided with scale lines.

[0016] The advantages of this invention compared to existing technologies are as follows: The structure of this pile testing auxiliary guide device is rationally designed. Due to the use of a liftable and pre-set length guide cylinder, the overall structure is relatively short in its retracted state, saving structural space and facilitating storage and transportation. Compared to traditional auxiliary guide structures of the same efficiency, its length can be reduced by more than 40%. Compared to ordinary pile testing auxiliary guide structures of the same efficiency, the number of parts is reduced, and both volume and weight can be reduced by about 30%. Furthermore, this pile testing auxiliary guide device has fewer parts, making assembly simpler, manufacturing processes simplified, and the dynamic balance of the structure improved. Moreover, by using a support base, support legs, moving wheels, and leveling components, this pile testing auxiliary guide device is easy to move and can freely switch between different pile locations to be inspected on the construction site. The structure has been optimized and upgraded, making leveling easier and ensuring the overall horizontality of the support base and calibration plate. This provides a strong benchmark for guiding the subsequent pile testing with the impact hammer and improving the accuracy of pile testing. Furthermore, the design utilizes a combination of the calibration plate, drive screw, guide rod, drive motor, guide cylinder, and connecting lug. The movement of the wheels, along with the transparent and marked calibration plate, aligns the center point of the pile under test. This simple structure facilitates operation, significantly reducing manufacturing costs and saving time and effort. Additionally, the guide cylinder height can be easily and precisely adjusted. While conserving resources, this design is suitable for various scenarios and pile testing requirements, greatly improving the guiding effect of the impact hammer on the pile, further enhancing the efficiency of pile testing, effectively ensuring the accuracy of pile testing, and making it more practical. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a perspective view of the overall structure of the present invention;

[0019] Figure 2 This is a front view of the overall structure of the present invention;

[0020] Figure 3 This is a diagram showing the leveling and fixing state of the support base of the present invention;

[0021] Figure 4 This is a partial structural diagram of the guiding mechanism of the present invention;

[0022] Figure 5 This is a perspective view of the calibration disk of the present invention;

[0023] Figure 6 This is a schematic diagram of the connection structure of the calibration disk of the present invention.

[0024] In the diagram: 1. Support mechanism; 11. Support base; 12. Support leg; 13. Moving wheel; 14. Through hole; 2. Leveling mechanism; 21. Fixing block; 22. Fastening clamp; 23. Fixing rod; 24. Leveling component; 241. First lead screw; 242. Second lead screw; 243. Rotating sleeve; 244. Bubble level; 25. Foot pad; 26. Limiting plate; 3. Guide mechanism; 31. Calibration disc; 311. Cross mark; 312. Fixing ring; 313. Indicator disc; 32. Drive lead screw; 33. Guide rod; 34. Drive motor; 35. Guide cylinder; 36. Connecting lug; 37. Reinforcing rib; 38. Scale line; 4. Connecting structure; 41. Strong magnet mother block; 42. Strong magnet daughter block. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0026] It should be noted that, in specific embodiments of the present invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the use of phrases such as "comprising a..." to define an element does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0027] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "equipped" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] Example 1: As Figures 1 to 6 As shown:

[0029] A pile testing auxiliary guiding device based on the high-strain method includes a support mechanism 1, a leveling mechanism 2, and a guiding mechanism 3. This pile testing auxiliary guiding device has a reasonable structural design. Due to the use of a pre-length, liftable guide cylinder, the overall structure has a relatively short volume in its contracted state, saving structural space and facilitating storage and transportation. Compared with traditional auxiliary guiding structures of the same efficiency, its length can be reduced by more than 40%. Compared with ordinary pile testing auxiliary guiding structures of the same efficiency, the number of parts is reduced, and both volume and weight can be reduced by about 30%. Furthermore, this pile testing auxiliary guiding device has fewer parts, making assembly simpler, the manufacturing process simpler, and the dynamic balance of the structure improved.

[0030] like Figure 1As shown: In this embodiment, the support mechanism 1 includes a support base 11, support legs 12, and movable wheels 13. The support base 11 is distributed left and right, and has a through hole 14 in the middle; the through hole is designed to accommodate the installation of a calibration plate, and its diameter is larger than the outer diameter of the pile to be inspected, so as to facilitate the impact hammer's inspection of the pile. The support legs 12 are vertically distributed, and one end is fixed to the support base 11 by bolts. The movable wheels 13 are mounted on the support legs 12 via brackets; the movable wheels 13 are universal wheels with braking function. The diameter of the movable wheels is large enough to adapt to complex and uneven pile construction sites, ensuring the ease of movement and practicality of the equipment.

[0031] like Figure 2 As shown: In this embodiment, the leveling mechanism 2 includes a fixing block 21, a fastening clamp 22, a fixing rod 23, a leveling component 24, and a pad 25. The fixing block 21 is disposed on the support base 11, and the fixing block can be fixedly connected to the support base by welding. A limiting plate 26 is also provided on the outside of the fixing block 21, and the two are fixedly connected by welding. The purpose of this arrangement is to provide a travel limit during the leveling of the fixed rod to ensure the vertical state of the fixed rod. Preferably, to increase the stability of the fixed rod support, a fastening bolt can be provided between the limiting plate and the fixed rod. The fastening clamp 22 is disposed on the support base 11 and located inside the fixing block 21. Specifically, the fastening clamp and the fixing block are on the same vertical plane. The purpose of this arrangement is to ensure the stability of the fixed rod during folding and unfolding support. The cross-section of the fastening clamp 22 is Y-shaped; preferably, the clamp claws of the fastening clamp adopt an open ring structure to achieve the fastening effect of the fixed rod during folding and unfolding, optimize the structural design, and save space. In a preferred embodiment, the support legs 12 and the leveling mechanism 2 are four sets that are matched and symmetrically distributed. Initially, one side of the fixing rod 23 is rotatably connected to the fixing block 21, and the other side is engaged with the fastening clamp 22. That is, the fixing rod is in a horizontally distributed state at this time. The pad 25 has a disc-shaped structure with a sufficiently large outer diameter; this design aims to provide a sufficiently large supporting area.

[0032] like Figure 3As shown: In this embodiment, the foot 25 is connected to the fixed rod 23 via the leveling component 24. Specifically, the leveling component 24 includes a first lead screw 241, a second lead screw 242, a rotating sleeve 243, and a bubble level 244. The top end of the first lead screw 241 is fixedly installed on the fixed rod 23, which can be achieved by welding. The second lead screw 242 is vertically distributed, and its bottom end is connected to the foot 25 via a connecting rod 27. The connecting rod 27 and the foot 25 can be welded together to maintain an integral structure. The threads of the first lead screw 241 and the second lead screw 242 have opposite directions. The rotating sleeve 243 is disposed between the first lead screw 241 and the second lead screw 242. The three are an integral structure, so that when the rotating sleeve 243 rotates clockwise, the first lead screw 241 and the second lead screw 242 move away from each other; when the rotating sleeve 243 rotates counterclockwise, the first lead screw 241 and the second lead screw 242 move closer to each other. With this configuration, the horizontal adjustment of the support base is achieved by adjusting the distribution lengths of the first and second lead screws as a whole, while the bubble level 244 is horizontally distributed on the support base 11. The accuracy of the bubble level varies depending on the model and manufacturer. For applications requiring high-precision measurement, an FSK high-precision level or an RSK level can be selected; while for applications requiring general accuracy, other general-precision levels can be chosen. In this embodiment, considering the cost-effectiveness of the component structure and usage requirements, a general-precision level is sufficient.

[0033] like Figure 1 and Figure 4 As shown: In this embodiment, the guiding mechanism 3 includes a calibration disk 31, a drive screw 32, a guide rod 33, a drive motor 34, a guide cylinder 35, and a connecting lug 36. Figure 5As shown: The calibration disk 31 has a cross mark 311 at its center, and is movably connected to the side wall of the through hole 14 through the connecting structure 4. The calibration disk 31 includes a fixing ring 312 and an indicator disk 313; the indicator disk 313 can be made of either transparent glass or transparent plastic. The cross mark can be a standard cross indicator structure or a cross light strip structure. The inner side wall of the fixing ring 312 is clamped to the indicator disk 313, forming an integral structure. This arrangement facilitates alignment with the center of the pile to be tested. Initially, the calibration disk is installed at the through hole of the support base. By moving the wheels left, right, forward, and backward, the cross mark at the center of the calibration disk is adjusted to establish a reference and actual alignment with the cross mark or similar markings on the pile to be tested. After the cross mark on the calibration disk is aligned with the center of the pile, the extension of the support legs is initiated. With the coordination of the leveling structure consisting of the first lead screw 241, the second lead screw 242, the rotating sleeve 243, and the bubble level 244, the horizontal adjustment of the support base is completed, ensuring that the cross mark always corresponds to the center of the pile being tested. This pile testing auxiliary guidance device has a reasonable structural design, simple manufacturing process, and significantly reduced cost. It also saves resources and is applicable to pile testing needs in various scenarios and for various specifications, greatly improving the auxiliary guidance effect and accuracy of pile testing.

[0034] like Figure 4 As shown: The drive screw 32 is vertically disposed on the support base 11, and is rotatable but not movable relative to the support base 11 by bearings. The drive motor 34 is mounted on the bottom surface of the support base 11 via a bracket, and its output shaft is connected to the drive screw 32; the drive motor is a servo-controlled motor. The guide rod 33 is vertically disposed on the support base 11 and is symmetrically distributed with the drive screw 32; the guide cylinder 35 is coaxially disposed with the calibration disk 31, and the guide cylinder 35 is located above the calibration disk 31. The cross-section of the guide cylinder 35 is a circular structure adapted to the impact hammer; this facilitates efficient pile testing operations after precise guidance and auxiliary adjustment. The connecting lugs 36 are two in number, symmetrically distributed on the left and right sides, and both are integrally formed on the guide cylinder 35. The drive screw 32 passes through the left connecting lug 36, and the guide rod 33 passes through the right connecting lug 36. The drive screw 32 is threadedly connected to the left connecting lug 36, and the guide rod 33 is slidably connected to the right connecting lug 36. The guide rod 33 is also provided with scale lines 38, which forms a clear scale indication for easy observation of the height adjustment of the guide cylinder.

[0035] During lifting operations: When the drive motor starts rotating forward, it synchronously drives the drive screw to rotate clockwise, forming a "screw-nut structure" between the drive screw and the corresponding connecting lug. With the auxiliary guidance of the guide rod on the other side and the corresponding connecting lug, the connecting lug and guide cylinder are moved upwards to a preset height. When the drive motor starts rotating in reverse, it synchronously drives the drive screw to rotate counterclockwise, causing the connecting lug and guide cylinder to move downwards to a preset height.

[0036] like Figure 1 As shown: In this embodiment, the drive screw 32 and guide rod 33 are a matched set. Symmetrically distributed reinforcing ribs 37 are also provided on the support base 11. The reinforcing ribs 37 have an L-shaped structure, and the bottom end of the left reinforcing rib 37 is fixed to the support base 11 by welding, while the top end is connected to the drive screw 32 by a bearing; the bottom end of the left reinforcing rib 37 is fixed to the support base 11, and the top end is fixed to the top end of the guide rod 33 by welding. This configuration results in a simple structure, low manufacturing cost, and good support effect, while improving the stability of the guide cylinder's movement and lifting while ensuring sufficient stability.

[0037] Example 2: Figure 1 and Figure 6 As shown: Based on Embodiment 1, a pile testing auxiliary guidance device based on the high strain method further includes: the connecting structure 4 is a series of evenly distributed rings, and each group of the connecting structure 4 includes a strong magnet mother block 41 and a strong magnet daughter block 42. The strong magnet mother block 41 is disposed on the inner sidewall of the through hole 14, and the strong magnet daughter block 42 is disposed on the outer sidewall of the fixing ring 312. The strong magnet mother block 41 and the strong magnet daughter block 42 are matched and installed. The purpose of this arrangement is to achieve the connection between the calibration plate and the support base in a cost-effective, stable, and easily detachable manner, simplifying the manufacturing process and making it more practical.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pile testing and guiding device based on high strain method, characterized in that: Including support mechanism (1), leveling mechanism (2) and guide mechanism (3);The support mechanism (1) includes support seat (11), support leg (12), moving wheel (13);The support seat (11) is distributed left and right, and the middle part is provided with through hole (14);The support leg (12) is vertically distributed and one end is fixedly installed on the support seat (11) by bolt, the moving wheel (13) is set on the support leg (12) by support;The leveling mechanism (2) includes fixed block (21), fastening clamp (22), fixed rod (23), leveling piece (24), foot pad (25);The fixed block (21) is arranged on the support seat (11), the fastening clamp (22) is arranged on the support seat (11) and located on the inner side of the fixed block (21), the cross section of the fastening clamp (22) is Y-shaped as a whole;In the initial state, one side of the fixed rod (23) is rotatably connected with the fixed block (21), and the other side is clamped with the fastening clamp (22);The foot pad (25) is disc-shaped structure, and is connected with the fixed rod (23) through the leveling piece (24);The guide mechanism (3) includes calibration disc (31), drive screw (32), guide rod (33), drive motor (34), guide cylinder (35), connecting lug seat (36);The center of the calibration disc (31) is provided with a cross mark (311), and is movably connected with the side wall of the through hole (14) through the connecting structure (4);The drive screw (32) is vertically arranged on the support seat (11), and is rotatable relative to the support seat (11) and not movable relative to the support seat (11) through the bearing;The drive motor (34) is arranged on the bottom end face of the support seat (11) through the support, and the output shaft is connected with the drive screw (32);The guide rod (33) is vertically arranged on the support seat (11), and is symmetrically distributed with the drive screw (32);The guide cylinder (35) is coaxially arranged with the calibration disc (31), and the guide cylinder (35) is located above the calibration disc (31), the guide cylinder (35) is a circular structure suitable for impact weight;The connecting lug seat (36) is symmetrically distributed on the left and right, and is arranged in the guide cylinder (35), and the two are integrally formed;The drive screw (32) penetrates through the left connecting lug seat (36), and the guide rod (33) penetrates through the right connecting lug seat (36), and the drive screw (32) and the left connecting lug seat (36) are threadedly connected, and the guide rod (33) and the right connecting lug seat (36) are slidably connected.

2. A pile testing and guiding device based on high strain method according to claim 1, characterized in that: The moving wheel (13) is a universal wheel with brake function.

3. A pile testing and guiding device based on high strain method according to claim 2, characterized in that: A limiting plate (26) is further arranged on the outer side of the fixed block (21), and the two are fixed by welding connection.

4. A pile testing and guiding device based on high strain method according to claim 3, characterized in that: The support leg (12) and the leveling mechanism (2) are four groups of matching installation and symmetric distribution.

5. A pile testing and guiding device based on high strain method according to claim 4, characterized in that: The leveling member (24) comprises a first screw rod (241), a second screw rod (242), a rotating sleeve (243) and a bubble level (244); the first screw rod (241) is fixedly installed at the top end of the fixed rod (23); the second screw rod (242) is vertically distributed and connected to the foot pad (25) through the connecting rod (27) at the bottom end; the screw threads of the first screw rod (241) and the second screw rod (242) are opposite in rotation direction; the rotating sleeve (243) is arranged between the first screw rod (241) and the second screw rod (242) and is of an integrated structure, so that when the rotating sleeve (243) rotates clockwise, the first screw rod (241) and the second screw rod (242) move away from each other; the bubble level (244) is horizontally arranged on the support base (11).

6. A pile testing and guiding device based on high strain method according to claim 1, characterized in that: The calibration disc (31) comprises a fixed ring (312) and an indicating disc (313); the indicating disc (313) can be made of any one of transparent glass and transparent plastic; the inner side wall of the fixed ring (312) is clamped and installed with the indicating disc (313) and they form an integrated structure.

7. A pile testing and guiding device based on high strain method according to claim 6, characterized in that: The connecting structure (4) is evenly distributed in multiple groups in a ring shape, and each group of the connecting structure (4) comprises a strong magnet mother block (41) and a strong magnet sub-block (42); the strong magnet mother block (41) is arranged on the inner side wall of the through hole (14), the strong magnet sub-block (42) is arranged on the outer side wall of the fixed ring (312), and the strong magnet mother block (41) and the strong magnet sub-block (42) are matched and installed.

8. A pile testing and guiding device based on high strain method according to claim 7, characterized in that: The driving screw rod (32) and the guide rod (33) are a matched group; the support base (11) is further provided with symmetrically distributed reinforcing ribs (37), the reinforcing ribs (37) are of an L-shaped structure, the bottom end of the left reinforcing rib (37) is fixedly connected with the support base (11) by welding, and the top end is connected with the driving screw rod (32) by a bearing; the bottom end of the left reinforcing rib (37) and the top end of the guide rod (33) are fixed by welding.

9. A pile testing and guiding device based on high strain method according to claim 8, characterized in that: The guide rod (33) is further provided with a scale line (38).

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