Pile hole impact deviation rectifying device under complex geological conditions
By using a pile hole impact correction device under complex geological conditions, and by combining a limiting and inclination measuring mechanism, real-time measurement and correction of borehole deviation were achieved, solving the problems of low construction efficiency and difficulty in ensuring trenching quality, and improving construction efficiency and borehole quality.
Patent Information
- Application Number
- CN202520296149.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-02-24
AI Technical Summary
Under complex geological conditions, during the construction of wire rope impact drilling, it is difficult to measure the borehole deviation in real time, resulting in low construction efficiency and difficulty in ensuring the quality of trenching.
Design a pile hole impact correction device under complex geological conditions. Through the cooperation of a limiting mechanism and a tilt measuring mechanism, the device can realize the real-time measurement and correction of the deviation of the drilling rig steel rope. The device includes a support frame, a limiting mechanism and a tilt measuring mechanism. The gap between the grooved wheel and the tilt measuring component is used to ensure the stability of the drilling rig steel rope, and the rotation of the tilt measuring component is used to realize the continuous measurement of the degree of deviation.
It enables continuous measurement and timely correction of borehole deviation, improves construction efficiency, ensures borehole quality, and avoids the impact of segmented drilling on project progress.
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Figure CN223839072U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of building construction technology, specifically to a pile hole impact correction device under complex geological conditions. Background Technology
[0002] Leakage in cofferdams, dam bodies, and dam foundations is a persistent problem in hydropower projects. Cutoff walls are a commonly used and effective seepage prevention measure, but construction quality control and technical assurance are crucial. Especially in complex geological conditions and strata such as sandy gravel or boulders, wire rope percussion drilling is often used to create boreholes. These boreholes are connected to form continuous wall sections, which are then filled with concrete to form the continuous wall seepage barrier. During this process, borehole creation and trenching are significant factors affecting the construction schedule. Borehole and trench deviations frequently occur due to the variable lithology and uneven hardness of complex strata. Because wire rope percussion drilling is used, it is difficult to detect trench deviation during construction. Measurements are required after each drilling depth, leading to discontinuous measurements and drilling stoppages, significantly impacting project progress. Furthermore, the segmented drilling process makes it difficult to guarantee the quality of the trenched boreholes. Utility Model Content
[0003] This application provides a pile hole impact correction device under complex geological conditions, which enables the inclinometer to rotate in response to the deflection of the wire rope, thereby realizing real-time measurement of the trench hole deviation. It can continuously measure throughout the construction process without stopping drilling or drilling in sections, thus solving the problems of low construction efficiency and difficulty in ensuring trench quality caused by existing correction methods.
[0004] This application is achieved through the following technical solution:
[0005] A pile hole impact correction device under complex geological conditions, comprising:
[0006] Supporting framework;
[0007] A limiting mechanism is connected to the support frame, and the limiting mechanism has a grooved wheel suitable for cooperating with the drilling rig steel rope;
[0008] Inclination measuring mechanism, wherein the inclination measuring mechanism is detachably connected to the support frame, and wherein the inclination measuring mechanism further comprises a rotatable inclination measuring component;
[0009] The inclination measuring component and the grooved wheel form a rope passage gap so that when the drilling rig steel rope deviates, the inclination measuring component will rotate on the inclination measuring mechanism.
[0010] The pile hole impact correction device provided in this application for complex geological conditions has a rope-passing gap formed between the grooved wheel in the limiting mechanism and the inclination measuring component in the inclination measuring mechanism, which allows the drilling rig steel rope to pass through the rope-passing gap. After the grooved wheel and the drilling rig steel rope cooperate, during the drilling process, the drilling rig steel rope can interact with the grooved wheel through rolling friction, thereby making the grooved wheel and the drilling rig steel rope in stable contact, thus ensuring the stability of the drilling rig steel rope during the drilling process. When the drilling steel rope deviates, the drilling steel rope can contact the inclination measuring component, causing the inclination measuring component to rotate on the inclination measuring mechanism. Thus, the inclination measuring component can measure the degree of deviation of the drilling rig steel rope according to its own rotation amplitude.
[0011] The pile hole impact correction device provided in this application under complex geological conditions can achieve continuous measurement compared with existing correction methods, eliminating the need for segmented drilling, improving drilling efficiency, and ensuring that the project progress is not affected. At the same time, based on continuous measurement, it can promptly and accurately determine the location of the deviation in the slot and correct it in the drilling direction, thereby ensuring that the slot has a better hole quality.
[0012] In some alternative embodiments, the support frame includes:
[0013] The four support legs are arranged in a rectangular configuration.
[0014] The first crossbar connects the two legs in the width direction;
[0015] The second crossbar is slidably connected to two legs in the length direction;
[0016] A limiting member is connected to the support leg and is used to cooperate with the second crossbar to restrict the support leg from sliding on the second crossbar.
[0017] The limiting mechanism is connected to the second crossbar.
[0018] In some alternative embodiments, the limiting member is configured as a locking pin.
[0019] In some optional embodiments, the limiting mechanism includes:
[0020] The limiting grid frame is connected to two second support rods respectively;
[0021] A wheel axle, with its two ends respectively passing through two limiting grid frames, wherein the grooved wheel is coaxially passed through the wheel axle and can rotate freely on the wheel axle;
[0022] Two limiting pins are detachably connected to both ends of the axle to restrict the axial sliding of the axle.
[0023] In some alternative embodiments, the limiting grid includes:
[0024] A limiting vertical bar, with multiple limiting vertical bars arranged in parallel at intervals, one end of which is connected to the second horizontal bar;
[0025] The limiting horizontal bar is arranged in the same direction as the limiting vertical bars. One end of the limiting horizontal bar is rotatably connected to the first limiting vertical bar, and the other end is detachably connected to the last limiting vertical bar.
[0026] In some optional embodiments, the inclinometer mechanism includes:
[0027] A base, wherein the base is detachably connected to the first crossbar;
[0028] A diagonal brace, one end of which is hinged to the base and the other end of which is hinged to the inclinometer assembly.
[0029] In some alternative embodiments, the base is configured as a magnetic base, wherein the second crossbar is configured as a magnetically adsorbable bar.
[0030] In some optional embodiments, the inclinometer component includes:
[0031] A slant measuring frame is rotatably connected to the inclined strut, wherein the slant measuring frame has an arc-shaped contact surface facing the grooved wheel to form a rope passage gap with the grooved wheel;
[0032] Inclinometer, which is connected to the inclinometer frame.
[0033] In some alternative embodiments, the inclinometer frame includes:
[0034] A first contact block, wherein the first contact block has a first arc-shaped contact surface;
[0035] The second contact block has a second arc-shaped contact surface, wherein the first contact block and the second contact block are arranged at intervals, and the first arc-shaped contact surface and the second arc-shaped contact surface are coplanar;
[0036] A connecting rod, the two ends of which are respectively connected to the first contact block and the second contact block.
[0037] In some alternative embodiments, a level is configured on the support frame.
[0038] Compared with the prior art, this application has the following advantages and beneficial effects:
[0039] 1. The pile hole impact correction device provided in this application under complex geological conditions has a rope-passing gap formed between the grooved wheel in the limiting mechanism and the inclination measuring component in the inclination measuring mechanism, which allows the drilling rig steel rope to pass through the rope-passing gap. After the grooved wheel and the drilling rig steel rope cooperate, during the drilling process, the drilling rig steel rope can interact with the grooved wheel through rolling friction, thereby making the grooved wheel and the drilling rig steel rope in stable contact, thus ensuring the stability of the drilling rig steel rope during the drilling process. When the drilling steel rope deviates, the drilling steel rope can contact the inclination measuring component to make the inclination measuring component rotate on the inclination measuring mechanism, so that the inclination measuring component can measure the degree of deviation of the drilling rig steel rope according to its own rotation amplitude.
[0040] 2. The pile hole impact correction device provided in this application under complex geological conditions can achieve continuous measurement compared with the existing correction methods, eliminating the need for segmented drilling, improving drilling efficiency, and ensuring that the project progress is not affected. At the same time, based on continuous measurement, it can promptly and accurately determine the location of the deviation of the slot hole and correct it in the drilling direction, thereby ensuring that the slot hole has a better hole formation quality. Attached Figure Description
[0041] The accompanying drawings, which are included to provide a further understanding of the embodiments of this application and form part of this application, do not constitute a limitation on the embodiments of this application. In the drawings:
[0042] Figure 1 A schematic diagram of the pile hole impact correction device under complex geological conditions provided in the embodiments of this application;
[0043] Figure 2 A top view of the pile hole impact correction device under complex geological conditions provided in this application embodiment;
[0044] Figure 3 A front view structural diagram of the pile hole impact correction device under complex geological conditions provided in the embodiments of this application.
[0045] The attached diagram shows the markings and corresponding component names:
[0046] 1-Outrigger, 2-First crossbar, 3-Second crossbar, 4-Limiting component, 5-Axle, 6-Limiting pin, 7-Groove wheel, 8-Limiting vertical bar, 9-Limiting horizontal bar, 10-Base, 11-Diagonal brace, 12-Inclinometer, 13-First contact block, 14-Second contact block, 15-Connecting rod, 16-Level, 17-Drilling rig steel rope. Detailed Implementation
[0047] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this application are only for explaining this application and are not intended to limit this application.
[0048] like Figures 1-3 As shown in the embodiment of this application, a pile hole impact correction device under complex geological conditions is provided. The pile hole impact correction device under complex geological conditions includes a support frame, a limiting mechanism, and a tilting mechanism. The limiting mechanism is connected to the support frame and has a grooved wheel 7 suitable for cooperating with the drilling rig steel cable 17. The tilting mechanism is detachably connected to the support frame and has a rotatable tilting component. A rope clearance is formed between the tilting component and the grooved wheel 7 so as to drive the tilting component to rotate on the tilting mechanism when the drilling rig steel cable 17 deviates.
[0049] The pile hole impact correction device provided in this embodiment of the application, under complex geological conditions, has a rope-passing gap formed between the grooved wheel 7 in the limiting mechanism and the inclination measuring component in the inclination measuring mechanism, thereby allowing the drilling rig steel rope 17 to pass through the rope-passing gap. In actual implementation, after the drilling rig steel rope 17 passes through the rope-passing gap, the distance between the drilling rig steel rope 17 and the inclination measuring component is configured to be 1-2 mm. When the grooved wheel 7 and the drilling rig steel rope 17 cooperate, during the drilling process, the drilling rig steel rope 17 can interact with the grooved wheel 7 through rolling friction, thereby making the grooved wheel 7 and the drilling rig steel rope 17 in stable contact, thus ensuring the stability of the drilling rig steel rope 17 during the drilling process. When the drilling steel rope deviates, the drilling steel rope can contact the inclination measuring component to make the inclination measuring component rotate on the inclination measuring mechanism, so that the inclination measuring component can measure the degree of deviation of the drilling rig steel rope 17 according to its own rotation amplitude.
[0050] The pile hole impact correction device provided in this application embodiment under complex geological conditions, compared with the existing correction method, can achieve continuous measurement, eliminating the need for segmented drilling, improving drilling efficiency, and ensuring that the project progress is not affected. At the same time, based on continuous measurement, it can promptly and accurately determine the position of the slot hole deviation and correct it in the drilling direction, thereby ensuring that the slot hole has a better hole formation quality.
[0051] In this embodiment, the support frame is used to build on the top of the guide wall, that is, at the opening of the slot, to support the limiting mechanism and the inclination measuring mechanism. To accommodate slots of different widths, the support frame can be set as an adjustable frame. For example, in some optional embodiments, the support frame may include support legs 1, a first crossbar 2, a second crossbar 3, and a limiting member 4. There are four support legs 1, arranged in a rectangle. For ease of description, the four support legs 1 are named the first support leg, the second support leg, the third support leg, and the fourth support leg, respectively. The first and second support legs are located at the two ends of the wide side of the rectangle, and the first and fourth support legs are located at the two ends of the long side of the rectangle. The first and third support legs are located at two opposite corner points of the rectangle. In use, the first and second support legs are attached to one side of the guide wall, and the third and fourth support legs are attached to the other side of the guide wall to achieve the positioning of the support frame between the guide walls. In actual implementation, each support leg 1 can be configured as a rectangular column, and the rectangular column has a regular shape. The planar surface can form a stable fit with the guide wall; there are two first crossbars 2, which are respectively connected between the first and second legs, and between the third and fourth legs; there are also two second crossbars 3, one of which is slidably connected to the first and fourth legs, and the other is slidably connected to the second and third legs. That is, the two first crossbars 2 and the two second crossbars 3 form a rectangular area, in which the second crossbar 3 serves as the long side of the rectangular area. The length of the long side of the rectangular area can be adjusted by sliding the first and second legs on the second crossbar 3, so that the four legs 1 can be used in drilling projects with different slot widths; the limiting member 4 is connected to the legs 1 and is used to cooperate with the second crossbar 3 to restrict the sliding of the legs 1 on the second crossbar 3. In actual implementation, the limiting member 4 can be a commonly used locking pin for easy operation; the limiting mechanism is connected to the second crossbar 3.
[0052] In some optional embodiments, the limiting mechanism may specifically include a limiting grid frame, a wheel axle 5, and a limiting pin 6; the two limiting grid frames are respectively connected to two second support rods; the two ends of the wheel axle 5 are respectively passed through the two limiting grid frames, wherein the grooved wheel 7 is coaxially passed through the wheel axle 5 and can rotate freely on the wheel axle 5; the two limiting pins 6 are respectively detachably connected to the two ends of the wheel axle 5 to limit the axial sliding of the wheel axle 5. After removing the limiting pin 6 at one end of the wheel axle 5, the wheel axle 5 can be separated from the limiting grid frame.
[0053] In this embodiment, the limiting grid frame can provide different installation positions for the wheel axle 5, thereby facilitating the adjustment of the position of the grooved wheel 7. The grooved wheel 7 not only ensures the stability of the drilling rig steel cable 17 during drilling, but also plays a guiding and limiting role during the drilling process, providing convenience for the drilling process. In this process, the grooved wheel 7 can rotate with the lifting of the drilling rig steel cable 17, thereby preventing wear on the drilling rig steel cable 17.
[0054] In some optional embodiments, the limiting grid frame may specifically include limiting vertical bars 8 and limiting horizontal bars 9; multiple limiting vertical bars 8 are arranged in parallel at intervals, and one end of the limiting vertical bar 8 is connected to the second horizontal bar 3; in the arrangement direction of the limiting vertical bars 8, one end of the limiting horizontal bar 9 is rotatably connected to the first limiting vertical bar 8, and the other end is detachably connected to the last limiting vertical bar 8. In actual implementation, the other end can be detachably connected to the limiting vertical bar 8 using a common door lock for easy operation.
[0055] In this embodiment, after the connection between the limiting horizontal bar 9 and the limiting vertical bar 8 is released and the limiting horizontal bar 9 is rotated, the wheel axle 5 can be placed between the two limiting vertical bars 8 along the length direction of the limiting vertical bar 8, which is convenient for installation and easy to adjust the position of the wheel axle 5 along the length direction of the second horizontal bar 3.
[0056] In some optional embodiments, the inclinometer mechanism may specifically include a base 10 and a diagonal brace 11; the base 10 is detachably connected to the first crossbar 2, thereby making the position of the inclinometer mechanism on the first crossbar 2 adjustable; one end of the diagonal brace 11 is hinged to the base 10, and the other end is hinged to the inclinometer assembly. With this configuration, after the position of the grooved wheel 7 in the length direction of the second crossbar 3 changes, the diagonal brace 11 can be rotated by applying an external force to maintain a preset rope clearance between the inclinometer assembly and the grooved wheel 7.
[0057] It should be noted that the hinge in this embodiment refers to the fact that the inclined support rod 11 and the base 10 can only rotate relative to each other by applying an external force. Without the action of an external force, the inclined support rod 11 and the base 10 can maintain their state on their own. Similarly, the inclination measuring component and the inclined support rod 11 can also maintain their state on their own without the action of an external force. When the drilling rig steel cable 17 deviates and contacts the inclination measuring component, causing the inclination measuring component to bear the contact pressure, the inclination measuring component can rotate on the inclined support rod 11. Thus, the inclination measuring component realizes the degree of deviation of the drilling rig steel cable 17 according to the degree of deviation.
[0058] To facilitate adjustment of the position of the base 10 on the second crossbar 3, in some alternative embodiments, the base 10 is configured as a magnetic base, wherein the second crossbar 3 is configured as a magnetically adsorbable rod.
[0059] In some optional embodiments, the inclinometer assembly includes an inclinometer frame and an inclinometer 12; the inclinometer frame is rotatably connected to the diagonal brace 11, wherein the inclinometer frame has an arc-shaped contact surface facing the grooved wheel 7 to form a rope passage gap with the grooved wheel 7. After the drilling rig steel cable 17 passes through this rope passage gap, the distance between the drilling rig steel cable 17 and the arc-shaped contact surface is 1-2 mm to ensure inclinometer accuracy. For example, when the inclination of the drilling rig steel cable 17 exceeds 1‰, the drilling rig steel cable 17 will come into contact with the inclinometer assembly. This allows the inclinometer assembly to rotate on the inclined support rod 11, with the arc-shaped contact surface adapting to the surface shape of the drilling rig steel cable 17. When the drilling rig steel cable 17 deviates, the inclinometer frame can respond promptly and accurately by rotating on the inclined support rod 11, ensuring measurement accuracy and response sensitivity. The inclinometer 12 is connected to the inclinometer frame, so that when the drilling rig steel cable 17 comes into contact with the inclinometer frame, the inclinometer 12 on the inclinometer frame will deviate as the inclinometer frame rotates, thereby realizing the monitoring of the deviation of the drilling rig steel cable 17.
[0060] In some optional embodiments, the inclinometer frame includes a first contact block 13, a second contact block 14, and a connecting rod 15; the first contact block 13 has a first arcuate contact surface; the second contact block 14 has a second arcuate contact surface, wherein the first contact block 13 and the second contact block 14 are arranged at intervals, and the first arcuate contact surface and the second arcuate contact surface are coplanar; the two ends of the connecting rod 15 are respectively connected to the first contact block 13 and the second contact block 14.
[0061] In this embodiment, the connecting rod 15 increases the distance between the first arc-shaped contact surface and the second arc-shaped contact surface. With this arrangement, if the arrangement direction of the first contact block 13 and the second contact block 14 is deviated during installation, the large distance between the first contact block 13 and the second contact block 14 will result in a larger difference in the distance between the first arc-shaped contact surface, the second arc-shaped contact surface and the drilling rig steel cable 17. This will facilitate measurement and inspection by the staff, thereby making it easier to accurately adjust the position of the first contact block 13 and the second contact block 14, so that the distance between the first arc-shaped contact surface, the second arc-shaped contact surface and the drilling rig steel cable 17 remains consistent.
[0062] In some alternative embodiments, a level 16 is configured on the support frame, which facilitates rapid leveling of the entire device during installation.
[0063] The specific embodiments described above illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Although the description of this application is presented in conjunction with some embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of this application. To provide a thorough understanding of this application, many specific details are included in the above description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.
[0064] It should be noted that in this specification, similar reference numerals and letters in the above figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this application, it should be noted that unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" 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; and they can refer to the internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0065] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.
Claims
1. A pile hole impact correction device under complex geological conditions, characterized in that, include: Supporting framework; A limiting mechanism is connected to the support frame and has a grooved wheel (7) suitable for cooperating with the drilling rig steel rope (17). Inclination measuring mechanism, wherein the inclination measuring mechanism is detachably connected to the support frame, and wherein the inclination measuring mechanism further comprises a rotatable inclination measuring component; The inclination measuring component forms a rope clearance with the grooved wheel (7) so that when the drilling rig steel rope (17) deviates, the inclination measuring component will rotate on the inclination measuring mechanism.
2. The pile hole impact correction device under complex geological conditions according to claim 1, characterized in that, The supporting framework includes: Support legs (1), the four support legs (1) are arranged in a rectangular shape; The first crossbar (2) is connected between two legs (1) in the width direction; The second crossbar (3) is slidably connected to two legs (1) in the length direction; A limiting member (4) is connected to the support leg (1). The limiting member (4) is used to cooperate with the second crossbar (3) to restrict the support leg (1) from sliding on the second crossbar (3). The limiting mechanism is connected to the second crossbar (3).
3. The pile hole impact correction device under complex geological conditions according to claim 2, characterized in that, The limiting member (4) is configured as a locking pin.
4. The pile hole impact correction device under complex geological conditions according to claim 2, characterized in that, The limiting mechanism includes: The limiting grid frame is connected to two second support rods respectively; A wheel axle (5) is provided at both ends on two limiting grid frames, wherein the grooved wheel (7) is coaxially provided on the wheel axle (5) and can rotate freely on the wheel axle (5); Limiting pins (6), the two limiting pins (6) are detachably connected to both ends of the axle (5) to limit the axial sliding of the axle (5).
5. The pile hole impact correction device under complex geological conditions according to claim 4, characterized in that, The limiting grid frame includes: Limiting vertical rods (8), multiple limiting vertical rods (8) are arranged in parallel at intervals, and one end of the limiting vertical rod (8) is connected to the second horizontal rod (3); The limiting horizontal bar (9) is arranged in the same direction as the limiting vertical bar (8). One end of the limiting horizontal bar (9) is rotatably connected to the first limiting vertical bar (8), and the other end is detachably connected to the last limiting vertical bar (8).
6. The pile hole impact correction device under complex geological conditions according to claim 2, characterized in that, The inclinometer mechanism includes: The base (10) is detachably connected to the first crossbar (2); The diagonal brace (11) is hinged at one end to the base (10) and at the other end to the inclinometer assembly.
7. The pile hole impact correction device under complex geological conditions according to claim 6, characterized in that, The base (10) is configured as a magnetic base, wherein the second crossbar (3) is configured as a magnetically adsorbable bar.
8. The pile hole impact correction device under complex geological conditions according to claim 6, characterized in that, The inclinometer component includes: Inclinometer frame, the inclinometer frame is rotatably connected to the inclined support rod (11), wherein the inclinometer frame has an arc-shaped contact surface, the arc-shaped contact surface faces the grooved wheel (7) to form a rope clearance with the grooved wheel (7); Inclinometer (12), which is connected to the inclinometer frame.
9. The pile hole impact correction device under complex geological conditions according to claim 8, characterized in that, The inclinometer frame includes: The first contact block (13) has a first arc-shaped contact surface; The second contact block (14) has a second arc-shaped contact surface, wherein the first contact block (13) and the second contact block (14) are arranged at intervals, and the first arc-shaped contact surface and the second arc-shaped contact surface are coplanar; A connecting rod (15) is provided, with its two ends connected to the first contact block (13) and the second contact block (14), respectively.
10. The pile hole impact correction device under complex geological conditions according to claim 1, characterized in that, A level (16) is mounted on the support frame.