Drilling hole wall reinforcing device for model test

Abstract

The invention provides a drill hole wall reinforcing device for a model test, the drill hole wall reinforcing device comprises a lifting device, an expansion device and an electrical box, the lifting device is connected with the expansion device, the lifting device controls the expansion device to lift in a drill hole, and the electrical box is electrically connected with the expansion device to control the expansion device; wherein the expansion device comprises an expansion part and a fixing part, the expansion part comprises an expansion plate, the expansion plate is telescopically arranged in the radial direction of a drill hole so as to be used for compacting the hole wall of the drill hole, the fixing part comprises a telescopic rod, the telescopic rod is telescopically arranged in the radial direction of the drill hole, and the telescopic rod can be inserted into the hole wall of the drill hole. The position of the expansion device in the drilling depth direction is fixed. According to the scheme, the position of the expansion device in the depth direction of the drill hole is fixed through the fixing part, and then the side wall of the drill hole is compacted through stretching and retracting of the expansion plate in the expansion part, so that reinforcement of the hole wall of the drill hole in the depth direction is achieved, the deformation coupling error of the drill hole is reduced, and the stability of the drill hole is improved.

Description

Technical Field

[0001] The invention relates to the technical field of geological engineering, and in particular to a borehole wall reinforcement device for model testing. Background Art

[0002] Physical model tests are an important means of verifying technologies in many fields, such as landslide monitoring technology, evolution mechanism analysis, and prevention and control technology. Drilling is a common step in physical model tests, and is mainly used for artificially excavated anti-slide pile simulation, deep deformation monitoring technology verification, and in-situ monitoring sensor deployment verification inside the sliding body. Due to the size limitations of the model body itself, there are limitations to drilling and excavation in indoor model tests: 1. After artificial excavation, the layered model soil has different rebound amounts along the radial direction of the borehole, resulting in deformation coupling between the inclinometer tube and the model body during later deformation monitoring, and the inclinometer technology verification is disturbed. 2. Insufficient compaction, the hole wall collapses during the drilling process, resulting in drilling failure, which makes subsequent work such as artificially excavated anti-slide pile simulation and in-situ monitoring sensor deployment verification inside the sliding body unsuccessful, often resulting in a huge waste of manpower and material resources.

[0003] The reinforcement methods of in-situ underground bored structures mainly include static pressure grouting and mechanical methods. Static pressure grouting mainly sprays cement slurry into the borehole to improve the strength of the soil on the side wall of the borehole, thereby achieving borehole reinforcement. This method requires changing the strength of the soil around the borehole, and its size is large, so it is not suitable for small-sized model tests. Mechanical methods include targeted protection devices, drill mouth reinforcement, annular protection structures, inflation and pressurization methods, etc., to achieve partial or overall reinforcement or protection of the borehole, but it is also difficult to apply to model tests due to size reasons. Summary of the invention

[0004] The invention provides a drilling hole wall reinforcement device for model test, so as to realize the reinforcement of the drilling hole wall in the model test, reduce the deformation coupling error of the drilling hole, and improve the stability.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a borehole wall reinforcement device for model testing, comprising a lifting device, an expansion device and an electrical box, the lifting device and the expansion device are connected, the lifting device controls the expansion device to rise and fall in the borehole, and the electrical box and the expansion device are electrically connected to control the expansion device; wherein, the expansion device comprises an expansion part and a fixing part, the expansion part comprises an expansion plate, the expansion plate is telescopically arranged in the radial direction of the borehole for compacting the borehole wall, the fixing part comprises a telescopic rod, the telescopic rod is telescopically arranged in the radial direction of the borehole, the telescopic rod can be inserted into the borehole wall to fix the position of the expansion device in the depth direction of the borehole.

[0006] Furthermore, the expansion part also includes a matching column, a movable column and a connecting rod. The movable column is installed on the matching column. The movable column is movably arranged up and down along the matching column. The two ends of the connecting rod are respectively hinged to the movable column and the expansion plate. When the movable column moves, the angle between the connecting rod and the matching column changes, and the connecting rod drives the expansion plate to move radially in the drilled hole.

[0007] Furthermore, the movable column is sleeved on the matching column, and the expansion part also includes a motor and a rotating nut. The rotating nut and the matching column are threadedly matched. The motor drives the coupling to rotate, and the coupling drives the rotating nut to move up and down, thereby driving the movable column to move; or the movable column and the matching column are threadedly matched, and the expansion part also includes a motor, which drives the movable column and the matching column to rotate relative to each other, so that the movable column moves up and down along the matching column.

[0008] Furthermore, there are multiple expansion plates, and the multiple expansion plates are distributed in the circumferential direction of the drilled hole.

[0009] Furthermore, the expansion part also includes a matching disk and a guide rail, the guide rail and the expansion plate are fixedly connected, the guide rail and the groove of the matching disk are slidably matched, and the guide rail guides the expansion plate to enable the expansion plate to move radially along the drilled hole.

[0010] Furthermore, the matching disk is rotatably arranged to adjust the position of the expansion plate in the circumferential direction of the borehole, thereby compacting different circumferential positions of the borehole.

[0011] Furthermore, the expansion part also includes a pressure sensor, which is installed on the expansion plate. The pressure sensor is used to detect the pressure between the expansion plate and the hole wall of the drilled hole to determine whether the hole wall is compacted.

[0012] Furthermore, the fixing part also includes a spring, which abuts against the movable column. When the movable column is driven to move downward, the expansion plate extends and the spring is compressed by the movable column. After the force driving the movable column downward is eliminated, the spring pushes the movable column upward and the expansion plate retracts.

[0013] Furthermore, the telescopic rod is a rack, and the fixing part further comprises a second spur gear, which drives the rack to move back and forth so that the rack can be inserted into the hole wall of the drilled hole or pulled out from the hole wall.

[0014] Furthermore, the lifting device is a cable drum, which is connected to the lifting ring of the expansion part through a cable, and the cable drum drives the fixing part to rise and fall by retracting and releasing the cable.

[0015] The technical solution of the present invention is applied to provide a drilling hole wall reinforcement device for model testing, including a lifting device, an expansion device and an electrical box, the lifting device is connected to the expansion device, the lifting device controls the expansion device to rise and fall in the drilling hole, and the electrical box and the expansion device are electrically connected to control the expansion device; wherein the expansion device includes an expansion part and a fixing part, the expansion part includes an expansion plate, the expansion plate is telescopically arranged in the radial direction of the drilling hole to compact the hole wall of the drilling hole, and the fixing part includes a telescopic rod, the telescopic rod is telescopically arranged in the radial direction of the drilling hole, and the telescopic rod can be inserted into the hole wall of the drilling hole to fix the position of the expansion device in the depth direction of the drilling hole. In this solution, the position of the expansion device in the depth direction of the drilling hole is first fixed by the fixing part, so that there will be no position deviation, and then the side wall of the drilling hole is compacted by the expansion plate in the expansion part, and then the expansion device is moved to different positions by the lifting device for sequential reinforcement, thereby realizing the reinforcement of the drilling hole wall in the depth direction, reducing the deformation coupling error of the drilling hole, and improving the stability of the drilling hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic diagram showing the overall working principle of a borehole wall reinforcement device for model testing provided by an embodiment of the present invention;

[0018] Figure 2 An exploded view of a borehole wall reinforcement device for model testing provided by an embodiment of the present invention is shown;

[0019] Figure 3 A schematic diagram showing the extension of an expansion plate in a borehole wall reinforcement device for model testing provided by an embodiment of the present invention;

[0020] Figure 4 A schematic diagram showing the extension of a telescopic rod in a borehole wall reinforcement device for model testing provided by an embodiment of the present invention.

[0021] The above drawings include the following reference numerals:

[0022] 1. Test bracket;

[0023] 2. Cable reel;

[0024] 3. Electrical box;

[0025] 4. Rock and soil for testing;

[0026] 5. Expansion device;

[0027] 6. Cable;

[0028] 7. Cables;

[0029] 501, rings;

[0030] 502. Motor;

[0031] 503, coupling;

[0032] 504, top seat;

[0033] 505, connecting rod;

[0034] 506, expansion plate;

[0035] 507. Pressure sensor;

[0036] 508, first straight gear;

[0037] 509, fixed seat;

[0038] 510, rack;

[0039] 511, end cap;

[0040] 512, second spur gear;

[0041] 513, matching plate;

[0042] 514, spring;

[0043] 515, movable column;

[0044] 516. Rotate the nut. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] like Figures 1 to 4As shown, an embodiment of the present invention provides a borehole wall reinforcement device for model testing, including a lifting device, an expansion device 5 and an electrical box 3, the lifting device and the expansion device 5 are connected, the lifting device controls the expansion device 5 to rise and fall in the borehole, the electrical box 3 and the expansion device 5 are electrically connected to control the expansion device 5; the expansion device 5 includes an expansion part and a fixing part, the expansion part includes an expansion plate 506, the expansion plate 506 is telescopically arranged in the radial direction of the borehole, and is used to compact the borehole wall, the fixing part includes a telescopic rod, the telescopic rod is telescopically arranged in the radial direction of the borehole, and can be inserted into the borehole wall to fix the position of the expansion device 5 in the depth direction of the borehole.

[0047] In this solution, the position of the expansion device 5 in the depth direction of the borehole is first fixed by the fixing part so that no position deviation occurs. Then, the side wall of the borehole is compacted by the expansion plate 506 in the expansion part, and then the expansion device is moved to different positions and reinforced in sequence by the lifting device, thereby achieving reinforcement of the borehole wall in the depth direction, reducing the deformation coupling error of the borehole, and improving the stability of the borehole.

[0048] Through this design, the reinforcement device can accurately control the reinforcement degree of the borehole wall in the model test, effectively prevent the hole wall from being deformed due to pressure and other reasons during the test, and ensure the accuracy of the test data. It is suitable for a variety of scenarios such as geological model tests, architectural model tests, and material mechanics model tests, especially in tests that require precise control of the hole wall, and the effect is particularly significant.

[0049] like Figure 2 As shown, the expansion part also includes a matching column, a movable column 515 and a connecting rod 505. The movable column 515 is installed on the matching column and can be moved up and down along the matching column. The two ends of the connecting rod 505 are respectively hinged to the movable column 515 and the expansion plate 506. When the movable column 515 moves, the angle between the connecting rod 505 and the matching column changes, and the connecting rod 505 drives the expansion plate 506 to move radially in the borehole. This mechanical structure design makes the expansion plate more stable and can adapt to boreholes of different diameters, thereby improving the versatility and flexibility of the reinforcement device. In geological model tests, this design can better adapt to the complex changes in the strata and ensure the consistency of the borehole wall reinforcement.

[0050] In this embodiment, the movable column 515 is sleeved on the matching column, and the expansion part also includes a motor 502 and a rotating nut 516. The rotating nut 516 and the matching column are threaded together. The motor 502 drives the coupling 503 to rotate, and the coupling 503 drives the rotating nut 516 to move up and down, thereby driving the movable column 515 to move.

[0051] Further, the expansion device 5 includes a top seat 504, a motor 502 is fixed to the top seat 504, a motor shaft of the motor 502 is connected to one end of the circular hole of the coupling 503, a rotating nut 516 is installed in the hexagonal countersunk hole of the coupling 503, and the rotating nut 516 is connected to the thread on the matching column, and the matching column is fixed to the fixed seat 509. The upper end of the matching column penetrates into the hole in the top seat 504, and the coupling 503 has a space for the matching column to penetrate to avoid interference. The motor 502 drives the coupling 503 to rotate, thereby driving the rotating nut 516 to move up and down, and then driving the top seat 504 to squeeze the movable column 515 to achieve up and down movement on the fixed seat 509.

[0052] Or in another embodiment, the movable column 515 and the matching column are threadedly matched, and the fixing part further includes a motor 502, and the motor 502 drives the movable column 515 and the matching column to rotate relative to each other, so that the movable column 515 moves up and down along the matching column. Through the motor drive, the movable column is precisely controlled, and then the expansion plate is precisely controlled, which improves the automation of the reinforcement process and reduces the error of manual operation. In the geological model test, this design can quickly respond to the test requirements and improve the test efficiency.

[0053] There are multiple expansion plates 506, and the multiple expansion plates 506 are distributed around the borehole. The multi-point distributed expansion plate design can evenly compact the hole wall, avoid hole wall damage caused by local uneven force, and improve the uniformity and stability of hole wall reinforcement.

[0054] like Figure 2 and Figure 3 As shown, the expansion portion also includes a matching disk 513 and a guide rail, the guide rail and the expansion plate 506 are fixedly connected, the guide rail and the groove of the matching disk 513 are slidably matched, and the guide rail guides the expansion plate 506 to move the expansion plate 506 along the radial direction of the drill hole. This guiding structure ensures the linear movement of the expansion plate during the expansion and contraction process, avoids the deviation of the expansion plate during the movement process, and improves the reliability and stability of the reinforcement device. In tests that require multi-point reinforcement of the hole wall, this design can ensure that the reinforcement strength of each point is consistent, thereby improving the comparability of the test data.

[0055] Furthermore, the matching disk 513 is rotatably arranged to adjust the position of the expansion plate 506 around the borehole, thereby compacting different positions around the borehole. This adjustable design enables the reinforcement device to adapt to the non-uniform characteristics of the hole wall. By adjusting the position of the expansion plate 506, accurate reinforcement of different areas of the hole wall is achieved, thereby improving the targetedness and effect of the reinforcement. Specifically, the matching disk 513 is rotatably arranged on the fixed seat 509, and a driving motor is arranged on the fixed seat 509. The driving motor drives the gear fixed to the matching disk 513 to rotate through the first spur gear 508, thereby realizing the rotation of the matching disk 513. When the matching disk 513 rotates, the expansion plate 506 and the movable column 515 are driven to rotate through the guide rail to adjust the circumferential position of the expansion plate 506.

[0056] In this solution, the expansion part also includes a pressure sensor 507, which is installed on the expansion plate 506 and is used to detect the pressure between the expansion plate 506 and the hole wall of the drill hole to determine whether the hole wall is compacted. By monitoring the pressure in real time, the reinforcement device can automatically adjust the expansion and contraction strength of the expansion plate to ensure that the strength of the hole wall reinforcement is moderate, avoiding the problem of over-reinforcement or under-reinforcement, and improving the accuracy and safety of reinforcement.

[0057] like Figure 2 As shown, the fixing part also includes a spring 514, and the spring 514 abuts against the movable column 515. When the movable column 515 is driven to move downward, the expansion plate 506 extends, and the spring 514 is compressed by the movable column 515. After the force driving the movable column 515 downward is eliminated, the spring 514 pushes the movable column 515 upward, and the expansion plate 506 retracts. This spring reset design allows the expansion plate 506 to automatically retract after reinforcement is completed, which simplifies the operation process and improves the operation efficiency.

[0058] Specifically, the spring 514 is installed on the matching column of the fixed seat 509, and is located between the movable column 515 and the matching disk 513. When the motor 502 rotates forward, the movable column 515 moves downward, thereby driving the expansion plate 506 to extend, so that the spring 514 is in a compressed state; when the motor 502 rotates reversely, the pressure of the spring 514 is released, and the spring 514 pushes the movable column 515 to move upward, thereby retracting the expansion plate 506.

[0059] like Figure 4 As shown, the telescopic rod is a rack 510, and the fixing part further includes a second spur gear 512. The second spur gear 512 drives the rack 510 to move back and forth, so that the rack 510 is inserted into the hole wall of the drilled hole or pulled out from the hole wall. The movement of the rack driven by the gear can achieve precise control of the telescopic rod, thereby reliably limiting the position of the expansion device 5.

[0060] like Figure 1As shown, the lifting device is a cable drum 2, which is connected to the lifting ring 501 of the expansion part through the cable 7, and the cable drum 2 drives the fixing part to rise and fall by retracting and releasing the cable 7. This cable lifting design enables the expansion device 5 to be freely lifted and lowered in the borehole, adapting to the reinforcement requirements of different depths, and improving the flexibility and application range of the reinforcement device.

[0061] In order to understand this solution more clearly, further explanation is given below.

[0062] The present invention provides a borehole wall reinforcement device for model testing, comprising a test support 1, a cable drum 2, an electrical box 3, and an expansion device 5. The test support 1 is used to accommodate a test rock and soil body 4 that is proportioned to simulate various working conditions in the experiment. The electrical box 3 is connected to the expansion device 5 through the cable drum 2, and the bottom end of the cable 6 is connected to the expansion device 5, and the upper end is connected to the cable drum 2. The electrical box 3 is electrically connected to the expansion device 5, and the electrical box 3 supplies power to the expansion device 5 and controls its movement state. The cable drum 2 and the expansion device 5 are connected through three steel wire cables 7, and the electrical box 3 controls the forward or reverse rotation of the cable drum 2 to realize the rise and fall of the expansion device 5, so as to control the depth position of the expansion device 5 in the borehole. The cable drum 2 is rigidly fixed to the top side of the test support 1 by welding or other means. When the expansion device 5 is in the borehole, the electrical box 3 sends a cyclic extension and retraction signal to the expansion device 5, so that it repeatedly extends the hole wall until the side wall is compacted.

[0063] The expansion device 5 is mainly composed of a lifting ring 501, a motor 502, a coupling 503, a top seat 504, a connecting rod 505, an expansion plate 506, a pressure sensor 507, a spur gear, a fixing seat 509, a rack 510, an end cover 511, a spur gear, a matching disk 513, a spring 514, a movable column 515, a rotating nut 516 and the like.

[0064] The lifting ring 501 is fixed to the upper end of the top seat 504 for fixing the cable 7. There are three lifting rings 501 to ensure the stability of the device when it is raised and lowered. The lifting ring 501 is fixed to the top seat 504 through a threaded hole.

[0065] The power device of the expansion device 5 is a motor 502, which is fixed to the inner side of the top seat 504 and is the power source of the expansion device 5. The motor shaft is connected to one end of the circular hole of the coupling 503, and the rotating nut 516 is installed in the hexagonal countersunk hole of the coupling 503. The rotating nut 516 is connected to the fixed seat 509 through the threads on the matching column.

[0066] The pressure sensor 507 is fixed on the expansion plate to measure the soil pressure value at the current position in real time to determine whether the rock and soil in front is compacted.

[0067] The movable column 515 is installed on the matching column and can move up and down on the matching column. The movable column 515 is connected to the top seat 504 through bolts. The expansion plate 506 is connected to the movable column 515 through the connecting rod 505.

[0068] In one embodiment, when the motor 502 rotates, the top seat 504 drives the movable column 515 to move up and down along the thread of the matching column, and then drives the expansion plate to expand outward through the connecting rod 505, thereby hitting the loose section of the side wall of the drill hole. At the same time, a pre-tightening force is generated for the spring 514. When the expansion is completed, the tension of the spring 514 and the rotational pulling force of the motor 502 can be relied on to achieve rapid contraction.

[0069] Alternatively, in other embodiments, the motor drives the mating column to rotate, the movable column 515 is circumferentially limited and cannot rotate, and the thread on the mating column drives the movable column 515 to move up and down, thereby realizing the movement of the expansion plate 506.

[0070] The guide device of the expansion plate 506 is placed in the groove of the matching disk 513 to realize the linear movement of the expansion plate 506.

[0071] The matching disk 513 is connected to the first spur gear 508 through an internal gear. When the first spur gear 508 works, it drives the matching disk 513 to rotate, and then drives the expansion plate 506 to rotate, changing the relative position of the matching disk 513 and the borehole, thereby achieving compaction of the entire borehole.

[0072] The rack 510 is placed in the linear groove of the fixing seat 509, and is driven by the second spur gear 512 to move left and right, and then inserted into the rock and soil body, so that the expansion device 5 is fixed at a certain position of the rock and soil body.

[0073] An embodiment of the present invention also provides a method for using the device, based on the above-mentioned drilling hole wall reinforcement device for model testing, comprising the following steps:

[0074] S1. After determining the experimental simulation conditions, mix the test rock and soil and fill it into the model test frame according to the plan.

[0075] S2. A preliminary borehole is formed by manual digging, and the expansion device 5 is lowered into the drill by controlling the electrical box 3 to drive the cable drum 2.

[0076] S3. After the expansion device 5 is placed in the designated position, the motor in the end cover 511 is started to drive the second spur gear 512 to rotate, thereby driving the rack 510 to move left and right and penetrate into the rock and soil, and then the motor is turned off.

[0077] S4, start the motor 502 of the top seat 504 to rotate forward, drive the expansion device 5 to work, and make the expansion plate 506 enter the rock and soil. Since the initial soil pressure is relatively loose, the pressure value sensed by the pressure sensor 507 is relatively small. When the side wall is gradually compacted, the pressure value detected by the pressure sensor 507 will increase. When this pressure value no longer changes significantly, it is assumed that the side wall of the borehole has been compacted. At this time, the motor rotates in the opposite direction and reads the pressure sensor value on the expansion plate 506 in real time. When the pressure value reaches a certain value, the motor 502 is reversed, and the expansion plate 506 is retracted through the cooperation of the spring 514.

[0078] S5, by rotating the matching disk 513, the expansion plate 506 is driven to rotate a certain angle, and S4 is repeated until the hole wall is reinforced in every direction. The motor is reversed to retract the rack 510.

[0079] S6, control the electrical box 3 to drive the cable drum 2 to lower the expansion device 5 a unit distance (the height of the expansion plate 506), repeat the S3 action, when the expansion device 5 moves to the bottom, it is considered that one reinforcement work of a drill hole is completed.

[0080] The present invention can be used to compact the prefabricated borehole wall during the inclination monitoring of indoor model test drilling, and reduce the deformation coupling error. The present invention is a borehole wall reinforcement device for model test, which has a compact structure and can be used to reinforce small boreholes of indoor physical models. At the same time, the device of the present invention can adopt an automatic control system, the process is controllable, time-saving and labor-saving, and the structure is simple, the design is reasonable, the cost-effectiveness is high, and it is easy to promote.

[0081] The borehole wall reinforcement device for model testing provided in this scheme realizes the precise reinforcement of the borehole wall in the model test through the synergistic effect of the lifting device and the expansion device, which not only improves the accuracy and safety of the test, but also simplifies the operation process and reduces the test cost. The telescopic design of the expansion plate and the insertion of the telescopic rod of the fixed part into the hole wall ensure the stability and reliability of the reinforcement process. At the same time, the setting of the pressure sensor enables the reinforcement force to be monitored in real time, further improving the precise control of the reinforcement effect. In addition, the adjustability and automatic control of the device make it have a wide range of application prospects in various model tests, effectively improving the test efficiency and data quality. By adopting this reinforcement device, the reinforcement process of the borehole wall in the model test becomes more efficient and accurate, avoiding the problems of hole wall damage and uneven reinforcement that may be caused by traditional reinforcement methods, and significantly improving the reliability of the test data and the safety of the test process. The automatic control and adjustability of the device enable it to adapt to boreholes of different depths and diameters, providing great convenience for model tests.

[0082] The above is only an optional embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0083] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0084] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of this solution. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being only exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0085] In the description of this scheme, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing this scheme and simplifying the description. Unless otherwise stated, these directional words 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. Therefore, they cannot be understood as limiting the scope of protection of this scheme; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0086] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0087] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only to facilitate the distinction between corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this scheme.

Claims

1. A drilling hole wall reinforcement device for model testing, characterized in that: The invention comprises a lifting device, an expansion device (5) and an electrical box (3), wherein the lifting device is connected to the expansion device (5), the lifting device controls the expansion device (5) to rise and fall in the borehole, and the electrical box (3) and the expansion device (5) are electrically connected to control the expansion device (5); wherein the expansion device (5) comprises an expansion portion and a fixing portion, wherein the expansion portion comprises an expansion plate (506), wherein the expansion plate (506) is telescopically arranged in the radial direction of the borehole for compacting the borehole wall, and wherein the fixing portion comprises a telescopic rod, wherein the telescopic rod is telescopically arranged in the radial direction of the borehole, and wherein the telescopic rod can be inserted into the borehole wall for fixing the position of the expansion device (5) in the borehole depth direction.

2. The borehole wall reinforcement device for model testing according to claim 1, characterized in that: The expansion part also includes a matching column, a movable column (515) and a connecting rod (505). The movable column (515) is installed on the matching column. The movable column (515) is movably arranged up and down along the matching column. The two ends of the connecting rod (505) are respectively hinged to the movable column (515) and the expansion plate (506). When the movable column (515) moves, the angle between the connecting rod (505) and the matching column changes, and the connecting rod (505) drives the expansion plate (506) to move in the radial direction of the drilled hole.

3. The drilling hole wall reinforcement device for model testing according to claim 2 is characterized in that: The movable column (515) is sleeved on the matching column, and the expansion part further includes a motor (502) and a rotating nut (516). The rotating nut (516) and the matching column are threadedly matched. The motor (502) drives the coupling (503) to rotate, and the coupling (503) drives the rotating nut (516) to move up and down, thereby driving the movable column (515) to move; Or the movable column (515) and the matching column are threadedly matched, and the expansion part also includes a motor (502), and the motor (502) drives the movable column (515) and the matching column to rotate relative to each other, so that the movable column (515) moves up and down along the matching column.

4. The drilling hole wall reinforcement device for model testing according to claim 1, characterized in that: There are a plurality of expansion plates (506), and the plurality of expansion plates (506) are distributed in the circumferential direction of the drilled hole.

5. The drilling hole wall reinforcement device for model testing according to claim 1, characterized in that: The expansion portion also includes a matching disk (513) and a guide rail, wherein the guide rail and the expansion plate (506) are fixedly connected, and the guide rail and the groove of the matching disk (513) are slidably matched, and the guide rail guides the expansion plate (506) so that the expansion plate (506) moves radially along the drilled hole.

6. The drilling hole wall reinforcement device for model testing according to claim 5, characterized in that: The matching disk (513) is rotatably arranged to adjust the position of the expansion plate (506) around the borehole, thereby compacting different positions around the borehole.

7. The drilling hole wall reinforcement device for model testing according to claim 1, characterized in that: The expansion part further comprises a pressure sensor (507), wherein the pressure sensor (507) is mounted on the expansion plate (506), and the pressure sensor (507) is used to detect the pressure between the expansion plate (506) and the wall of the drilled hole to determine whether the wall of the hole is compacted.

8. The drilling hole wall reinforcement device for model testing according to claim 2, characterized in that: The fixing portion further comprises a spring (514), wherein the spring (514) abuts against the movable column (515), and when the movable column (515) is driven to move downward, the expansion plate (506) extends out, and the spring (514) is compressed by the movable column (515). After the force driving the movable column (515) downward is eliminated, the spring (514) pushes the movable column (515) upward, and the expansion plate (506) retracts.

9. The drilling hole wall reinforcement device for model testing according to claim 1, characterized in that: The telescopic rod is a rack (510), and the fixing portion further comprises a second spur gear (512), and the second spur gear (512) drives the rack (510) to move back and forth so that the rack (510) is inserted into the hole wall of the drill hole or pulled out from the hole wall.

10. The drilling hole wall reinforcement device for model testing according to claim 1, characterized in that: The lifting device is a cable drum (2), the cable drum (2) is connected to the lifting ring (501) of the expansion part via a cable (7), and the cable drum (2) drives the fixing part to rise and fall by retracting and releasing the cable (7).

Images