A segmented rock mass loosening zone detection device

Abstract

This invention belongs to the field of rock loosening zone detection technology, and provides a segmented rock loosening zone detection device, including several steel pipes connected in sequence. Two adjacent steel pipes are detachably connected by a connecting mechanism. A tail-end wooden plug is fixedly fitted on the outermost steel pipe of the borehole, and intermediate wooden plugs are fixedly fitted on the remaining steel pipes. A grouting assembly includes grout flow channels installed inside the steel pipes. Two grout flow channels in two adjacent steel pipes are connected. A grouting component is installed at the tail end of the outermost steel pipe of the borehole. Overflow components connected to the grout flow channels are installed on several intermediate wooden plugs, and the overflow components are used to overflow grout between the intermediate wooden plugs and the borehole wall. A detection assembly includes a pile acoustic wave detector and several acoustic wave detection modules respectively installed in the several steel pipes. The acoustic wave detection modules are electrically connected to the pile acoustic wave detector. This invention utilizes the wooden plug structure to improve water-blocking efficiency, reduce detection costs, and can adapt to detection at different borehole depths.

Description

Technical Field

[0001] This invention belongs to the field of rock mass loosening zone detection technology, and particularly relates to a segmented rock mass loosening zone detection device. Background Technology

[0002] In recent years, with the vigorous development of infrastructure and transportation engineering, more and more underground engineering projects are moving towards complex geological environments such as deep burial and high ground stress. Therefore, the deformation mechanism of underground rock masses is becoming increasingly complex, rock mass deformation is intensifying, and initial support failure is becoming more severe, leading to frequent geological disasters in underground engineering projects and seriously affecting the rapid development of underground engineering construction. However, testing the loosened zone of underground rock masses is an important way to understand the deformation law of rock masses and the design of support structures, and it is of great significance for the safety evaluation, construction methods, and selection of support measures for underground engineering projects.

[0003] Sonic wave detection of loosened rock mass is a technique that assesses the extent of rock mass damage after blasting or excavation by analyzing the propagation characteristics of sound waves within the rock mass. It is widely used in engineering fields such as mining, tunneling, and hydroelectric power stations. An acoustic wave detector, as a device that uses the characteristics of sound waves to acquire information, typically consists of a transmitter, a receiver, a control unit, and a display unit. The transmitter generates sound waves, which propagate within the rock mass. The wave velocity decreases due to the presence of fractures, reduced density, and increased acoustic impedance within the rock medium. If the rock mass is relatively intact, it experiences greater stress from the original rock and has a higher density, resulting in a higher sound wave propagation speed. The receiver captures these signals and analyzes the medium's characteristics using parameters such as time difference, waveform changes, and the propagation speeds of longitudinal and transverse waves.

[0004] Because acoustic methods typically use water as a coupling agent, they have high requirements for water quality, especially in acoustic testing of overhead boreholes where it is often difficult to prevent the outflow of coupling water, resulting in larger testing errors in overhead boreholes. Traditional testing devices often use rubber plugs, grouting, or airbags to seal the borehole, which has problems such as high cost, complex operation, and poor environmental performance, and is prone to failure under deep hole or complex borehole wall conditions. At the same time, existing equipment is mostly a one-piece design, which cannot flexibly adapt to boreholes of different diameters or depths, resulting in low testing efficiency and wasted resources. Summary of the Invention

[0005] The purpose of this invention is to provide a segmented rock mass loosening zone detection device to solve the above-mentioned problems, improve water blocking efficiency, reduce detection costs, and allow for the free setting of multiple detection units to adapt to detection at different hole depths.

[0006] To achieve the above objectives, the present invention provides the following solution: a segmented rock mass loosening zone detection device, comprising:

[0007] A steel pipe, several of the steel pipes are connected in sequence, and two adjacent steel pipes are detachably connected by a connecting mechanism. A wooden plug is fixedly fitted on the outermost steel pipe of the borehole, and a middle wooden plug is fixedly fitted on the other steel pipes.

[0008] The grouting assembly includes a grout flow channel component disposed within the steel pipe, two grout flow channels components in two adjacent steel pipes being connected, and a grouting component disposed at the tail end of the steel pipe located on the outermost side of the borehole. The grouting component is used to connect the grout flow channel component and the grouting equipment. An overflow component is disposed on a plurality of intermediate wooden plugs and is connected to the grout flow channel component. The overflow component is used to overflow the grout between the intermediate wooden plug and the borehole wall.

[0009] The detection assembly includes a pile acoustic wave detector and several acoustic wave detection modules respectively disposed in several of the steel pipes, and the several acoustic wave detection modules are electrically connected to the pile acoustic wave detector.

[0010] Preferably, the tail end plug and the middle plug are in the shape of a frustum, and the end of the tail end plug and the middle plug near the bottom of the borehole is the smaller diameter end;

[0011] The diameter of the large-diameter end of the intermediate wooden plug is the same as the inner diameter of the drill hole, and the diameter of the large-diameter end of the tail wooden plug is larger than the inner diameter of the drill hole.

[0012] Preferably, the connection mechanism between two adjacent steel pipes includes two sets of first plugs and two sets of second slots. The two first plugs are fixedly connected to one end sidewall of one steel pipe and are symmetrically arranged about the axis of the steel pipe. The two second slots are opened on one end sidewall of the other steel pipe. The two first plugs are adapted to the two second slots. A locking component is provided between the first plugs and the second slots.

[0013] Preferably, the locking assembly includes an arc-shaped seat, a plug plate is fixedly connected to the side wall of the arc-shaped seat along the radial direction of the arc-shaped seat, a baffle is fixedly connected to the outer side of the arc-shaped seat, and the plug plate passes through the second slot and the first plug along the radial direction of the steel pipe;

[0014] A limiting ring is slidably fitted on the steel pipe, one end of which abuts against the middle wooden plug, and the other end of which abuts against the baffle.

[0015] Preferably, the steel pipe has a threaded section on its side wall and a locking ring is fitted on the steel pipe. The locking ring is adapted to the threaded section. The two ends of the intermediate wooden plug are respectively abutted by the locking ring and the limiting ring. The locking ring and the limiting ring are used to fix the position of the intermediate wooden plug.

[0016] Preferably, the slurry flow channel component includes two sets of grouting pipes, the two grouting pipes are respectively fixedly connected to the inner wall of the steel pipe, and the two grouting pipes between two adjacent steel pipes are connected.

[0017] Preferably, the overflow assembly includes two sets of overflow channels opened along the radial direction of the intermediate wooden plug. One end of each of the two overflow channels is connected to the two grouting pipes, and the other end of each of the two overflow channels is respectively provided with two sets of overflow ports opened on the sidewall of the intermediate wooden plug and corresponding to the sidewall of the borehole.

[0018] Preferably, the tail end wooden plug and the middle wooden plug are provided with water injection channels along the axial direction of the steel pipe, and a water injection pipe is inserted into the water injection channel. One end of the water injection pipe is fixedly connected to a retaining ring, and the other end of the water injection pipe is detachably fitted with a locking ring. The retaining ring and the locking ring abut against the two ends of the tail end wooden plug or the middle wooden plug, respectively.

[0019] Preferably, a sealing assembly is provided at the front end of the steel pipe located at the bottom of the borehole. The sealing assembly includes a front end cap, one end of which is fixedly connected to two sets of second plugs. The two second plugs are respectively adapted to two second slots on the steel pipe located at the bottom of the borehole. The second plugs and the second slots are fixedly connected by a locking assembly.

[0020] It also includes a fastening cap, which is threaded onto the end of the front end cap away from the steel pipe, and the inner wall of the fastening cap is in contact with the locking assembly.

[0021] Preferably, the injection component includes a tail end cap, one end of which is provided with two sets of first slots. The two first slots are respectively adapted to two first plugs on the steel pipe away from the bottom of the borehole. The first slots and the first plugs are fixedly connected by a locking component.

[0022] It also includes a fastening ring, which is threaded onto the tail end cap, and the inner wall of the fastening ring is in contact with the locking assembly;

[0023] The tail end cap has a slurry flow channel, and the end of the slurry flow channel away from the steel pipe is connected to a grouting port. The other end of the slurry flow channel is connected to the two grouting pipes.

[0024] Compared with the prior art, the present invention has the following advantages and technical effects: The main function of the connecting mechanism is to facilitate the connection of two steel pipes, thereby allowing for the free connection of any number of steel pipes and the free combination of the number of acoustic detection modules according to different drilling depths; the main function of the tail end plug is to seal the borehole opening to prevent water from flowing out; the main function of the middle plug is to fix the steel pipe in the borehole and to form an independent detection unit among the acoustic detection modules; the main function of the slurry flow channel component is to allow the slurry in the grouting equipment to flow into each overflow component; the main function of the overflow component is to use the slurry to seal the gap between the middle plug and the inner wall of the borehole, preventing water from flowing between the two middle plugs and ensuring that each acoustic detection module can form an independent detection unit.

[0025] Overall, this invention utilizes wooden plugs for sealing within the borehole. The stable fixation of the wooden plugs reduces interference from probe vibration or external mechanical disturbances on the acoustic signal. Furthermore, the anti-corrosion treated wooden plugs prevent expansion and deformation in humid environments, ensuring long-term testing stability. Moreover, wood is readily available and easy to process, with costs far lower than airbag solutions and no risk of leakage, making it suitable for ecologically sensitive areas. Additionally, by incorporating several acoustic detection modules and intermediate wooden plugs, this invention can adapt to the needs of drilling at different depths. The independent detection units formed by each acoustic detection module can collect wave velocity data for each segment, accurately calculating the loosening zone range. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments 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.

[0027] Figure 1 This is a schematic diagram of the installation of the detection device of the present invention;

[0028] Figure 2 This is a cross-sectional schematic diagram of the detection device of the present invention;

[0029] Figure 3 for Figure 2 Enlarged view of part A in the image;

[0030] Figure 4 for Figure 2 Enlarged view of part B in the image;

[0031] Figure 5 This is a schematic diagram showing the connection between the front end cap and the steel pipe of the present invention;

[0032] Figure 6 This is a schematic diagram of the locking component of the present invention;

[0033] Figure 7 This is a schematic diagram of the overflow channel of the present invention;

[0034] Figure 8 This is a schematic diagram of the detection component of the present invention;

[0035] The components include: 1. Steel pipe; 2. Tail-end wooden plug; 3. Grouting pipe; 4. Tail-end cap; 5. Grouting port; 6. Grout flow channel; 7. Fastening ring; 8. Locking assembly; 81. Arc-shaped seat; 82. Insert plate; 83. Baffle; 9. First plug; 10. Middle wooden plug; 11. Water injection channel; 12. Water injection pipe; 13. Retaining ring; 14. Locking ring; 15. Overflow grout flow channel; 16. Overflow port; 17. Locking ring; 18. Limiting ring; 19. First slot; 20. Second slot; 21. Front end cap; 22. Fastening cap; 23. Second plug; 24. Acoustic wave generator; 25. First acoustic wave receiver; 26. Second acoustic wave receiver; 27. Pile acoustic wave detector. Detailed Implementation

[0036] 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.

[0037] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Reference Figures 1-8 This invention provides a segmented rock mass loosening zone detection device, comprising:

[0039] Steel pipe 1, several steel pipes 1 are connected in sequence, and two adjacent steel pipes 1 are detachably connected by a connecting mechanism. The outermost steel pipe 1 is fixedly fitted with a tail end wooden plug 2, and the other steel pipes 1 are fixedly fitted with a middle wooden plug 10.

[0040] The grouting assembly includes a grout flow channel component installed inside a steel pipe 1. Two grout flow channels components inside two adjacent steel pipes 1 are connected. A grouting component is installed at the tail end of the outermost steel pipe 1 in the borehole. The grouting component is used to connect the grout flow channel component and the grouting equipment. Several intermediate wooden plugs 10 are provided with overflow components that are connected to the grout flow channel component. The overflow components are used to spread the grout between the intermediate wooden plugs 10 and the borehole wall.

[0041] The detection assembly includes a pile acoustic wave detector 27 and several acoustic wave detection modules respectively installed in several steel pipes 1. The several acoustic wave detection modules are electrically connected to the pile acoustic wave detector 27.

[0042] The main function of steel pipe 1 is to facilitate the placement of the acoustic detection module into the borehole; the main function of the connecting mechanism is to facilitate the connection of two steel pipes 1, thereby allowing for the free connection of any number of steel pipes 1, and the number of acoustic detection modules can be freely combined according to different borehole depths; the main function of the tail end wooden plug 2 is to seal the borehole opening to prevent water from flowing out; the main function of the middle wooden plug 10 is to fix the steel pipe 1 in the borehole and to form an independent detection unit among the acoustic detection modules; the main function of the slurry flow channel component is to allow the slurry in the grouting equipment to flow into each overflow component; the main function of the overflow component is to use the slurry to seal the gap between the middle wooden plug 10 and the inner wall of the borehole, preventing water from flowing between the two middle wooden plugs 10, and ensuring that each acoustic detection module can form an independent detection unit. Overall, this invention utilizes wooden plugs for sealing within the borehole. The stable fixation of the wooden plugs reduces interference from probe vibration or external mechanical disturbances on the acoustic signal. Furthermore, the anti-corrosion treated wooden plugs prevent expansion and deformation in humid environments, ensuring long-term testing stability. Moreover, wood is readily available and easy to process, with costs far lower than airbag solutions and no risk of leakage, making it suitable for ecologically sensitive areas. Additionally, by incorporating several acoustic detection modules and intermediate wooden plugs, this invention can adapt to the needs of drilling at different depths. The independent detection units formed by each acoustic detection module can collect wave velocity data for each segment, accurately calculating the loosening zone range.

[0043] Further optimization of the design: the tail end plug 2 and the middle plug 10 are in the form of a frustum, and the end of the tail end plug 2 and the middle plug 10 near the bottom of the borehole is the small diameter end;

[0044] The diameter of the large-diameter end of the middle wooden plug 10 is the same as the inner diameter of the drill hole, while the diameter of the large-diameter end of the tail wooden plug 2 is larger than the inner diameter of the drill hole.

[0045] like Figure 1 and Figure 2 As shown, the large-diameter end of the intermediate wooden plug 10 is the same as the inner diameter of the drill hole, ensuring that the intermediate wooden plug 10 can smoothly enter the drill hole and be smoothly pulled out of the rotary hole. The large-diameter end of the tail wooden plug 2 is larger than the inner diameter of the drill hole, ensuring that after the tail wooden plug 2 is inserted into the rotary hole, it is pressed into the drill hole by friction with the inner wall of the drill hole, and then self-locked by friction between the inclined surface and the hole wall, fixing the steel pipe 1 and the acoustic detection module on the inner wall in the predetermined position, preventing the probe from sliding or displacing during the detection process.

[0046] The middle cork 10 and the tail cork 2 can be either frustum-shaped or wedge-shaped.

[0047] In a further optimized design, the connection mechanism between two adjacent steel pipes 1 includes two sets of first plugs 9 and two sets of second slots 20. The two first plugs 9 are fixedly connected to one end side wall of one steel pipe 1 and are symmetrically arranged about the axis of the steel pipe 1. The two second slots 20 are opened on one end side wall of the other steel pipe 1. The two first plugs 9 are adapted to the two second slots 20. A locking component 8 is provided between the first plugs 9 and the second slots 20.

[0048] like Figure 2 and Figure 4 As shown, when connecting two steel pipes 1, the end of one steel pipe 1 with the first plug 9 is fixedly connected to the end of the other steel pipe 1 with the second slot 20, and the first plug 9 is inserted into the second slot 20, so that the two steel pipes 1 are accurately connected, and at the same time, relative rotation between the two steel pipes 1 can be ensured.

[0049] Further optimization of the scheme: the locking component 8 includes an arc-shaped seat 81, a plug plate 82 is fixedly connected to the side wall of the arc-shaped seat 81 along the radial direction of the arc-shaped seat 81, a baffle 83 is fixedly connected to the outer side of the arc-shaped seat 81, and the plug plate 82 passes through the second slot 20 and the first plug 9 along the radial direction of the steel pipe 1.

[0050] A limiting ring 18 is slidably fitted on the steel pipe 1. One end of the limiting ring 18 abuts against the middle wooden plug 10, and the other end of the limiting ring 18 abuts against the baffle 83.

[0051] like Figure 4 and Figure 6 As shown, the outer wall of the second slot 20 on the steel pipe 1 has an arc-shaped groove for accommodating the arc-shaped seat 81. Simultaneously, the arc-shaped groove and the first plug 9 each have through holes along the radial direction of the steel pipe 1 for the insertion plate 82 to pass through. After the two steel pipes 1 are inserted, the insertion plate 82 is inserted into the through hole, and the arc-shaped seat 81 is inserted into the arc-shaped groove, thereby limiting the axial movement between the two steel pipes 1 and achieving the effect of connecting the two steel pipes 1.

[0052] In a further optimized design, a threaded section is provided on the side wall of the steel pipe 1, and a locking ring 17 is also fitted on the steel pipe 1. The locking ring 17 is adapted to the threaded section, and the two ends of the intermediate wooden plug 10 are respectively abutted by the locking ring 17 and the limiting ring 18. The locking ring 17 and the limiting ring 18 are used to fix the position of the intermediate wooden plug 10.

[0053] like Figure 2 and Figure 4As shown, before the test, the intermediate wooden plug 10 is fitted onto the steel pipe 1, and an upper limit ring 18 and a locking ring 17 are respectively fitted on both sides of the intermediate wooden plug 10. After the arc-shaped seat 81 is inserted into the arc-shaped groove, the locking ring 17 is rotated, causing the locking ring 17 to push the intermediate wooden plug 10 towards the upper limit ring 18. The inner wall of the upper limit ring 18 near the arc-shaped seat 81 has an annular groove. When the annular groove of the upper limit ring 18 moves to abut against the baffle 83, the position of the upper limit ring 18 cannot be moved. Continue to tighten the locking ring 17 to lock the intermediate wooden plug 10 at the end of the steel pipe 1. This ensures the smooth insertion and removal of the intermediate wooden plug 10 when the steel pipe 1 is inserted into the drill hole at the beginning of the test and when the steel pipe 1 is pulled out of the drill hole at the end of the test.

[0054] Further optimization of the scheme: the grout flow channel component includes two sets of grouting pipes 3, which are fixedly connected to the inner wall of the steel pipe 1, and the two grouting pipes 3 between two adjacent steel pipes 1 are connected.

[0055] The two grouting pipes 3 are symmetrically arranged about the axis of the steel pipe 1. To ensure the sealing of the connection between the grouting pipes 3 after the steel pipe 1 is connected, sealing sleeves (not shown in the figure) are snapped into both ends of the grouting pipe 3. The sealing effect is ensured by the fit between the sealing sleeves.

[0056] The scheme is further optimized. The overflow component includes two sets of overflow channels 15 opened in the radial direction along the middle wooden plug 10. One end of the two overflow channels 15 is connected to two grouting pipes 3 respectively, and the other end of the two overflow channels 15 is respectively set with two sets of overflow ports 16 opened on the side wall of the middle wooden plug 10 and corresponding to the borehole side wall.

[0057] like Figure 6 As shown, the side wall of the grouting pipe 3 is provided with an opening that communicates with the overflow channel 15. After the steel pipe 1 is placed in place, since the large end diameter of the intermediate wooden plug 10 is the same as the inner diameter of the borehole, in order to ensure the sealing between the intermediate wooden plug 10 and the inner wall of the borehole, grout is injected into the grouting pipe 3 through the grouting equipment. The grout in each grouting pipe 3 flows into the overflow channel 15 through the opening and finally flows out from the overflow port 16. The grout fills the gap between the intermediate wooden plug 10 and the inner wall of the borehole, thereby achieving the sealing between the intermediate wooden plug 10 and the inner wall of the borehole.

[0058] In a further optimized design, water injection channels 11 are provided along the axial direction of the steel pipe 1 on the end plug 2 and the middle plug 10. A water injection pipe 12 is inserted into the water injection channel 11. A retaining ring 13 is fixedly connected to one end of the water injection pipe 12, and a locking ring 14 is detachably fitted to the other end of the water injection pipe 12. The retaining ring 13 and the locking ring 14 abut against the two ends of the end plug 2 or the middle plug 10, respectively.

[0059] like Figure 2As shown, the water injection pipe 12 is inserted into the water injection channel 11, and then tightened onto the threaded section of the water injection pipe 12 by the locking ring 14. The locking ring 14 and the retaining ring 13 clamp the water injection pipe 12, fixing it in the intermediate wooden plug 10 or the tail wooden plug 2. By using the water injection pipe 12, the strength of the intermediate wooden plug 10 and the tail wooden plug 2 can be improved, and direct contact between the inside of the wooden plug and water can be avoided, thus increasing the durability of the intermediate wooden plug 10 and the tail wooden plug 2.

[0060] The scheme is further optimized by setting a sealing component at the front end of the steel pipe 1 located at the bottom of the borehole. The sealing component includes a front end cap 21. One end of the front end cap 21 is fixedly connected to two sets of second plugs 23. The two second plugs 23 are respectively adapted to two second slots 20 on the steel pipe 1 located at the bottom of the borehole. The second plugs 23 and the second slots 20 are fixedly connected by a locking component 8.

[0061] It also includes a fastening cap 22, which is threaded onto the end of the front end cap 21 away from the steel pipe 1, and the inner wall of the fastening cap 22 is in contact with the locking component 8.

[0062] like Figure 5 As shown, to prevent water from entering the steel pipe 1, a front plug 21 needs to be connected to the front end of the steel pipe 1 at the very front. To ensure the connection between the second plug 23 and the insert plate 82, a through hole with the same structure as the first plug 9 is provided on the second plug 23. Specifically, the two sets of second plugs 23 on the front plug 21 are inserted into the second slot 20. Then, the arc-shaped seat 81 is inserted into the arc-shaped groove and the insert plate 82 is inserted into the through hole, connecting the front plug 21 to the steel pipe 1. Then, a fastening cap 22 is screwed into the front plug 21. The inner wall of the fastening cap 22 near the steel pipe 1 has an arc-shaped groove. When the fastening cap 22 is tightened until the arc-shaped groove abuts against the baffle 83, the front plug 21 is secured.

[0063] The solution is further optimized. The injection component includes a tail end cap 4. One end of the tail end cap 4 is provided with two sets of first slots 19. The two first slots 19 are respectively adapted to two first plugs 9 on the steel pipe 1 away from the bottom of the borehole. The first slots 19 and the first plugs 9 are fixedly connected by a locking component 8.

[0064] It also includes a fastening ring 7, which is threaded onto the tail end cap 4, and the inner wall of the fastening ring 7 is in contact with the locking assembly 8.

[0065] like Figure 3As shown, to ensure the connection between the first slot 19 and the insert plate 82, an arc-shaped groove with the same structure as the side wall of the steel pipe 1 is provided on the side wall of the tail end cap 4. Specifically, the two sets of first plugs 9 on the steel pipe 1 are inserted into the two sets of first slots 19 on the tail end cap 4. Then, the arc-shaped seat 81 is inserted into the arc-shaped groove and the insert plate 82 is inserted into the through hole. The tail end cap 4 is then connected to the steel pipe 1. After that, the fastening ring 7 is screwed into the tail end cap 4. The inner wall of the fastening ring 7 near the steel pipe 1 has an arc-shaped groove. When the fastening ring 7 is tightened until the arc-shaped groove abuts against the baffle 83, the tail end cap 4 can be fastened.

[0066] A grout channel 6 is provided inside the end cap 4. The end of the grout channel 6 away from the steel pipe 1 is connected to the grouting port 5, and the other end of the grout channel 6 is connected to the two grouting pipes 3.

[0067] like Figure 3 As shown, since the tail end cap 4 and the steel pipe 1 are connected by a plug and slot structure, when the tail end cap 4 is installed on the steel pipe 1, the two sets of slurry outlets of the slurry flow channel 6 in the tail end cap 4 are connected to the inlets of the two sets of grouting pipes 3. In subsequent use, it can be ensured that both are in a connected state to ensure the smooth progress of the test.

[0068] The scheme is further optimized. The acoustic detection module includes a first acoustic receiver 25, a second acoustic receiver 26, and an acoustic generator 24. The acoustic generator 24, the first acoustic receiver 25, and the second acoustic receiver 26 are fixedly connected to the steel pipe 1 from front to back along the axis of the steel pipe 1. The first acoustic receiver 25, the second acoustic receiver 26, and the acoustic generator 24 are electrically connected to the pile acoustic detector 27. The pile acoustic detector 27 is used to control the operation of the first acoustic receiver 25, the second acoustic receiver 26, and the acoustic generator 24 and to display the detection results.

[0069] like Figure 8 As shown, in any group of steel pipes 1, the first sound wave receiver 25, the second sound wave receiver 26 and the sound wave generator 24 are all located on the side of the steel pipe 1 away from the end plug 2, and the sound wave generator 24 is located at the front end of the steel pipe 1.

[0070] Further optimize the plan, such as Figure 8 As shown, the first acoustic receiver 25, the second acoustic receiver 26, and the acoustic generator 24 are fixedly connected between the two sets of grouting pipes 3. The gaps between the first acoustic receiver 25, the second acoustic receiver 26, and the acoustic generator 24 and the inner wall of the steel pipe 1 are used to arrange the connecting lines between the first acoustic receiver 25, the second acoustic receiver 26, and the acoustic generator 24 in each steel pipe 1 and the pile acoustic detector 27.

[0071] To further optimize the design, in order to ensure the sealing between the steel pipes 1, sealing gaskets are provided at both ends of the steel pipes 1. At the same time, a sealing gasket is fixedly connected to the inner side of the arc-shaped seat 81 to ensure the sealing between the arc-shaped seat 81 and the steel pipe 1 or the tail end plug 4.

[0072] The working process of this embodiment is as follows:

[0073] Take an appropriate number of steel pipes 1 and intermediate wooden plugs 10, and connect the steel pipes 1 section by section. At the same time, during the connection process, put the locking ring 17, intermediate wooden plugs 10 and limiting rings 18 on the tail end of the steel pipes 1. Then, insert the locking assembly 8, tighten the locking ring 17, fix the intermediate wooden plugs 10, and connect the front end cap 21 to the front end of the foremost steel pipe 1. Pass the connecting wires of the first sound wave receiver 25, the second sound wave receiver 26 and the sound wave generator 24 in each steel pipe 1 through the inside of the steel pipe 1 and connect them to the pile sound wave detector.

[0074] A wooden plug 2 is fitted onto the tail end of the steel pipe 1. Several steel pipes 1 are inserted into the borehole to the target depth. The wooden plug 2 is then tapped to secure it at the borehole opening, providing a seal. Next, a tail end cap 4 is connected to the tail end of the steel pipe 1. Grout is first injected through the grouting port 5, flowing through the overflow port 16 into the space between the borehole inner wall and the intermediate wooden plug 10, filling the gap. Water is then injected into the borehole through the water injection pipe 12 on the tail end wooden plug 2, and through the water injection pipe 12 on the intermediate wooden plug 10, filling the entire borehole and forming an independent detection unit between two adjacent wooden plugs. Then, the acoustic generator 24 is activated to collect wave velocity data for each segment. By comparing the signal differences between adjacent acoustic detection modules, the loosening zone range is accurately calculated. After the detection is complete, the steel pipe 1 is pulled out.

[0075] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to 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 of this invention.

[0076] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A segmented rock mass loosening zone detection device, characterized in that, include: A steel pipe (1) is connected in sequence, and two adjacent steel pipes (1) are detachably connected by a connecting mechanism. A wooden plug (2) is fixedly fitted on the outermost steel pipe (1) of the borehole, and a middle wooden plug (10) is fixedly fitted on the other steel pipes (1). The grouting assembly includes a grout flow channel component disposed within the steel pipe (1), two grout flow channels components in two adjacent steel pipes (1) are connected, and a grouting component is disposed at the tail end of the steel pipe (1) located on the outermost side of the borehole. The grouting component is used to connect the grout flow channel component and the grouting equipment. An overflow component is disposed on several intermediate wooden plugs (10) that communicates with the grout flow channel component. The overflow component is used to overflow the grout between the intermediate wooden plug (10) and the borehole wall. The detection assembly includes a pile acoustic wave detector (27) and several acoustic wave detection modules respectively disposed in several of the steel pipes (1), and the several acoustic wave detection modules are electrically connected to the pile acoustic wave detector (27); The tail end plug (2) and the middle plug (10) are in the form of a frustum, and the end of the tail end plug (2) and the middle plug (10) near the bottom of the borehole is the small diameter end; The diameter of the large-diameter end of the intermediate wooden plug (10) is the same as the inner diameter of the drill hole, and the diameter of the large-diameter end of the tail wooden plug (2) is greater than the inner diameter of the drill hole. The steel pipe (1) has a threaded section on its side wall and a locking ring (17) is also fitted on the steel pipe (1). The locking ring (17) is adapted to the threaded section. The two ends of the intermediate wooden plug (10) are respectively abutted by the locking ring (17) and the limiting ring (18). The locking ring (17) and the limiting ring (18) are used to fix the position of the intermediate wooden plug (10).

2. The segmented rock mass loosening zone detection device according to claim 1, characterized in that: The connection mechanism between two adjacent steel pipes (1) includes two sets of first plugs (9) and two sets of second slots (20). The two first plugs (9) are fixedly connected to one end sidewall of one steel pipe (1) and the two first plugs (9) are symmetrically arranged about the axis of the steel pipe (1). The two second slots (20) are opened on one end sidewall of the other steel pipe (1). The two first plugs (9) are adapted to the two second slots (20). A locking component (8) is provided between the first plugs (9) and the second slots (20).

3. The segmented rock mass loosening zone detection device according to claim 2, characterized in that: The locking assembly (8) includes an arc-shaped seat (81), a plug plate (82) is fixedly connected to the side wall of the arc-shaped seat (81) in the radial direction of the arc-shaped seat (81), a baffle (83) is fixedly connected to the outer side of the arc-shaped seat (81), and the plug plate (82) passes through the second slot (20) and the first plug (9) in the radial direction of the steel pipe (1). A limiting ring (18) is slidably sleeved on the steel pipe (1). One end of the limiting ring (18) abuts against the intermediate wooden plug (10), and the other end of the limiting ring (18) abuts against the baffle (83).

4. The segmented rock mass loosening zone detection device according to claim 2, characterized in that: The grout flow channel includes two sets of grouting pipes (3), the two grouting pipes (3) are respectively fixedly connected to the inner wall of the steel pipe (1), and the two grouting pipes (3) between two adjacent steel pipes (1) are connected.

5. The segmented rock mass loosening zone detection device according to claim 4, characterized in that: The overflow assembly includes two sets of overflow channels (15) opened in the radial direction along the intermediate wooden plug (10). One end of the two overflow channels (15) is connected to the two grouting pipes (3) respectively, and the other end of the two overflow channels (15) is respectively set with the borehole sidewall through two sets of overflow ports (16) opened on the sidewall of the intermediate wooden plug (10).

6. The segmented rock mass loosening zone detection device according to claim 1, characterized in that: Water injection channels (11) are also provided on the end plug (2) and the middle plug (10) along the axial direction of the steel pipe (1). A water injection pipe (12) is inserted in the water injection channel (11). A retaining ring (13) is fixedly connected to one end of the water injection pipe (12). A locking ring (14) is detachably fitted on the other end of the water injection pipe (12). The retaining ring (13) and the locking ring (14) abut against the two ends of the end plug (2) or the middle plug (10), respectively.

7. The segmented rock mass loosening zone detection device according to claim 2, characterized in that: A sealing assembly is provided at the front end of the steel pipe (1) located at the bottom of the borehole. The sealing assembly includes a front end cap (21). One end of the front end cap (21) is fixedly connected to two sets of second plugs (23). The two second plugs (23) are respectively adapted to the two second slots (20) on the steel pipe (1) located at the bottom of the borehole. The second plugs (23) and the second slots (20) are fixedly connected by a locking assembly (8). It also includes a fastening cap (22), which is threaded onto the end of the front end cap (21) away from the steel pipe (1), and the inner wall of the fastening cap (22) is in contact with the locking assembly (8).

8. The segmented rock mass loosening zone detection device according to claim 4, characterized in that: The injection component includes a tail end cap (4), one end of which is provided with two sets of first slots (19). The two first slots (19) are respectively adapted to the two first plugs (9) on the steel pipe (1) away from the bottom of the borehole. The first slots (19) and the first plugs (9) are fixedly connected by a locking component (8). It also includes a fastening ring (7), which is threaded onto the tail end cap (4), and the inner wall of the fastening ring (7) is in contact with the locking assembly (8); The end cap (4) has a slurry channel (6) inside. The end of the slurry channel (6) away from the steel pipe (1) is connected to a grouting port (5), and the other end of the slurry channel (6) is connected to the two grouting pipes (3).

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