A kind of inserting rod and tunnel hole-spanning CT detection device

Abstract

The utility model provides a kind of inserted rod and tunnel hole-spanning CT detection device, belong to tunnel construction technical field, wherein, inserted rod includes inserted rod body, the inserted rod body is by a plurality of detection rods sequentially head-to-tail connected and constitutes, detachable sealing is connected between adjacent two detection rods, every detection rod is fixedly equipped with mounting ring, and mounting ring is equipped with mounting portion. With the quick, stable installation and positioning of probe (such as seismic wave emission probe or receiving probe) in mounting portion, by sending detection rod into deep hole, so as to accurately, stably, efficiently send probe to specified depth, effectively ensure the quality of seismic wave signal and the reliability of detection data, improve the detection efficiency, thereby improve the accuracy of advanced geological prediction and the effect of construction safety.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, specifically to a rod and a tunnel cross-hole CT detection device. Background Technology

[0002] In the field of tunnel engineering construction, advanced geological forecasting and precise exploration are crucial for ensuring construction safety and mitigating geological disaster risks. Cross-hole seismic computed tomography (CT) technology, as an advanced geophysical method, is widely used due to its advantages such as high detection accuracy, good resolution, and intuitive imaging. It is applied to areas requiring focused exploration, such as both sides of the tunnel design axis, below the invert arch, above the arch crown, or other key areas (e.g., faults, water-rich zones), to determine the spatial distribution of adverse geological features such as rock mass integrity, karst caves, and fracture zones.

[0003] The basic implementation process of this technology is as follows: Within the planned tunnel area, two or more boreholes, typically tens of meters deep, are drilled according to the detection plan. During operation, a seismic wave transmitting probe is placed in one borehole, while a receiving probe array is deployed in the remaining boreholes. By exciting and receiving seismic wave signals that pass through the rock mass between the boreholes, the wave velocity field of the rock mass between the boreholes is inverted using tomographic imaging algorithms, thereby achieving a detailed characterization of the internal structure of the detection area.

[0004] However, due to the large drilling depth and complex environment inside the borehole, ensuring the accurate, stable, and efficient delivery of the transmitting and receiving probes to the designated depth is a core prerequisite for guaranteeing data quality. Currently, there is a general lack of dedicated tools for this application scenario in the industry. Utility Model Content

[0005] One objective of this invention is to provide a probe to solve the problem in the prior art of how to accurately, stably, and efficiently deliver the transmitting probe and the receiving probe to the specified depth of the borehole; the second objective is to provide a tunnel cross-hole CT detection device.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An insertion rod includes an insertion rod body, which is composed of a plurality of probe rods connected end to end in sequence. Adjacent probe rods are detachably and sealed together. Each probe rod is fixedly fitted with a mounting ring, and the mounting ring is provided with a mounting part.

[0007] Furthermore, at least one of the probe rods is equipped with a roller.

[0008] Furthermore, each of the aforementioned probes has a central through hole.

[0009] Furthermore, one end of one of the probe rods is provided with a sleeve, and one end of the remaining probe rods is also provided with a sleeve. The other end of each probe rod is fixedly provided with a connecting tube. A connecting ring is fixedly provided at the end of the sleeve near the connecting tube. The connecting ring is fixed to the outer wall of the probe rod. The inner wall of the sleeve, the outer wall of the probe rod, and one side of the connecting ring together form an annular groove for inserting the connecting tube of another probe rod. An annular plate that can abut against one end of the connecting tube is slidably installed in the annular groove. An elastic element is installed between the annular plate and the connecting ring. A locking block is fixedly provided on the outer wall of the connecting tube. A longitudinal sliding groove that matches the locking block is provided on the inner wall of the sleeve. A circumferential locking groove that matches the locking block is provided at the end of the longitudinal sliding groove on the inner wall of the sleeve.

[0010] Furthermore, the longitudinal groove is arranged along the axial direction of the probe rod, the circumferential groove is arranged along the circumferential direction of the probe rod, the end of the longitudinal groove is connected to one end of the circumferential groove, and the locking block can slide within the longitudinal groove and the circumferential groove.

[0011] Furthermore, a longitudinal groove is provided on the inner wall of the sleeve. The longitudinal groove is arranged along the axial direction of the probe rod. One end of the longitudinal groove is connected to the end of the circumferential groove away from the longitudinal slide groove. The locking block can slide in the longitudinal groove.

[0012] Furthermore, the elastic element is a spring, one end of which is fixed to the connecting ring, and the other end of which is fixed to the annular plate.

[0013] Furthermore, an annular buffer pad is fixed to the side of the annular plate away from the spring.

[0014] Furthermore, the inner diameter of the connecting tube is larger than the outer diameter of the probe rod, a rubber layer is provided on the inner wall of the connecting tube, and the connecting tube and one end of the probe rod are interference fit.

[0015] On the other hand, this utility model also proposes a tunnel cross-hole CT detection device, including a seismic wave transmitting unit and a seismic wave receiving unit. The seismic wave transmitting unit includes at least one transmitting probe and the insertion rod as described above, and the seismic wave receiving unit includes at least one receiving probe and the insertion rod as described above. Both the transmitting probe and the receiving probe are fixedly provided with collars, and a locking device is provided between the collars and the mounting part. Both the transmitting probe and the receiving probe can be fixedly installed on the detection rod by the locking device. When there are multiple transmitting probes, the multiple transmitting probes are connected end to end in sequence by wires; When there are multiple receiving probes, the multiple receiving probes are connected end to end in sequence by wires.

[0016] The beneficial effects of this utility model are: 1. The probe rod of this application is fixedly equipped with an installation ring and an installation part, which can quickly and stably install and position the probe (such as a seismic wave transmitting probe or receiving probe). By sending the probe rod into the deep hole, the probe can be accurately, stably and efficiently delivered to the specified depth, effectively ensuring the quality of the seismic wave signal and the reliability of the detection data, improving the detection efficiency, and thus improving the accuracy of advanced geological prediction and construction safety.

[0017] 2. The main body of the probe in this application is composed of several probes. On the one hand, it can be used to carry out operations when facing complex and varied drilling methods. For example, if the transmitting hole / receiving hole is an inclined drilling hole, it is inconvenient or impossible to insert a whole long probe into the hole in the tunnel. The segmented probe can cope with various situations and complete the detection operation. On the other hand, the segmented design of the probe facilitates transportation and storage.

[0018] 3. This application reduces the frictional resistance of the probe rod when it moves in the borehole by setting rollers on the probe rod. The probe rod with rollers is usually inserted into the hole as the front end, which facilitates the deployment and retrieval of the probe rod, improves the work efficiency, and reduces the risk of the probe getting stuck in the hole.

[0019] 4. By creating a central through hole in the probe rod, this application not only reduces the overall weight of the probe rod, making it easier to handle and operate, but also provides space for cable laying or fluid channels, thus enhancing the functionality and practicality of the probe rod. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the installation structure of the insertion rod in the receiving hole in this utility model; Figure 2 This is a schematic diagram of the probe rod in this utility model; Figure 3 This is a schematic cross-sectional view of the probe in this utility model; Figure 4 for Figure 3 Enlarged structural diagram at point A; Figure 5 for Figure 3 Enlarged structural diagram at point B; Figure 6 This is a cross-sectional structural diagram of the sleeve in this utility model; Figure 7 This is a schematic diagram of the mounting ring in this utility model.

[0021] The components include: 1. Detector rod; 2. Mounting ring; 3. Roller; 4. Mounting part; 5. Receiving probe; 6. Wire; 7. Receiving hole; 8. Central through hole; 9. Locking part; 10. Collar ring; 11. Casing; 12. Connecting pipe; 13. Connecting ring; 14. Annular groove; 15. Locking block; 16. Longitudinal sliding groove; 17. Circumferential locking groove; 18. Longitudinal locking groove; 19. Annular plate; 20. Buffer pad; 21. Elastic element; 22. Sealing structure; 23. Well fluid. Detailed Implementation

[0022] The embodiments of this utility model will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be understood that the preferred embodiments are only for illustrating this utility model and not for limiting the scope of protection of this utility model.

[0023] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0024] On the one hand, this embodiment proposes a plug, such as Figures 2 to 7 As shown, the device includes a probe body, which is composed of several probe rods 1 connected end to end. Adjacent probe rods 1 are detachably and sealed together. Each probe rod 1 is fixedly fitted with an installation ring 2, and the installation ring 2 has an installation part 4. In this embodiment, the installation ring 2 and installation part 4 are fixedly installed on the probe rod 1, which allows for the rapid and stable installation and positioning of the probe (such as a seismic wave transmitting probe or receiving probe 5). By inserting the probe rod 1 into the deep hole, the probe can be accurately, stably, and efficiently delivered to the specified depth, effectively ensuring the quality of the seismic wave signal and the reliability of the detection data, improving detection efficiency, and thus enhancing the accuracy of advanced geological prediction and construction safety. Furthermore, the probe is assembled from several probe rods 1. On the one hand, it can operate in complex and varied drilling methods. For example, if the transmitting / receiving hole 7 is an inclined borehole, a single long probe rod is inconvenient or impossible to insert into the hole in the tunnel. The segmented probe rod 1 can handle various situations and complete the detection operation. On the other hand, the segmented design of the probe facilitates transportation and storage.

[0025] At least one probe rod 1 is equipped with a roller 3. In this embodiment, the roller 3 can drive the probe rod 1 to move along its axial direction. The roller 3 is preferably mounted on the mounting ring 2, and the roller 3 and the mounting part 4 are located on opposite sides of the mounting ring 2. The mounting part 4 is integrally formed with the mounting ring 2, and the surface of the mounting part 4 is flat, which facilitates the rapid installation of the probe. By setting the roller 3 on the probe rod 1, the frictional resistance when the probe moves in the borehole is reduced, which facilitates the deployment and retrieval of the probe, improves the work efficiency, and reduces the risk of the probe getting stuck in the hole.

[0026] Each probe rod 1 has a central through hole 8 extending along the axial direction, which not only reduces the overall weight of the probe and facilitates handling and operation, but also provides space for cable laying or fluid channels, enhancing the functionality and practicality of the probe.

[0027] In the above embodiments, as needed, the drilling methods for cross-hole CT detection are becoming increasingly diverse in current tunnel construction. The layout of these boreholes is not limited to the traditional parallel to the tunnel axis, but is flexible and varied. For example, boreholes can be drilled at the tunnel face, radiating outwards along the tunnel axis to achieve a larger detection range. This means that these boreholes may be inclined downwards, inclined upwards, or parallel to the tunnel axis. When the borehole is inclined, due to the limited space within the tunnel and the drilling depth typically reaching tens of meters, a single rod body is inconvenient or impossible to use for detection operations in the confined tunnel space. Therefore, the rod body is designed as a segmented structure for easier transport and operation.

[0028] In the above embodiments, it is preferable that only one probe rod 1 is equipped with a roller 3, which allows the insertion rod body to be smoothly deployed and retrieved while controlling costs. The number of rollers 3 is not limited and can be one or more. When there are multiple rollers 3, they are spaced apart along the axial direction of the probe rod 1. The probe rod 1 equipped with rollers 3 is preferably used as the front end of the entire insertion rod body, that is, when inserted into the drill hole, it is used as the first or second rod. This structural design facilitates the movement of the entire insertion rod body in the hole.

[0029] In the above embodiments, during on-site construction, well fluid 23 (such as water) is often filled into the borehole to increase the transmission effect of seismic wave energy within the rock mass. The probe rod 1 is set as a tube, and the external well fluid 23 can enter the borehole through a pumping system and the probe rod. It should be noted that when the borehole is inclined or parallel to the tunnel axis, after filling with well fluid 23, the borehole opening needs to be sealed to prevent the well fluid 23 from flowing out. There are various sealing methods, such as expansion airbags, grouting sealing, or the use of rapid sealing materials (such as polymer sealant). The sealing structure 22 covers the surface of the probe rod and seals the gap between the probe rod and the borehole.

[0030] One end of one probe rod 1 is provided with a sleeve 11, and the other end is a standard pipe. The remaining probe rods 1 are all provided with sleeves 11 at one end and a connecting pipe 12 fixed at the other end. A connecting ring 13 is fixed at the end of the sleeve 11 near the connecting pipe 12. The connecting ring 13 is fixed on the outer wall of the probe rod 1. The inner wall of the sleeve 11, the outer wall of the probe rod 1, and one side of the connecting ring 13 together form an annular groove 14 for the connecting pipe 12 of another probe rod 1 to be inserted. An annular plate 19 that can abut against one end of the connecting pipe 12 is slidably installed in the annular groove 14. An elastic element 21 is installed between the annular plate 19 and the connecting ring 13. In this embodiment, the elastic element 21 is a spring. One end of the spring is fixed on the connecting ring 13, and the other end of the spring is fixed on the annular plate 19. A locking block 15 is fixedly provided on the outer wall of the connecting pipe 12, and a longitudinal sliding groove 16 adapted to the locking block 15 is provided on the inner wall of the sleeve 11. A circumferential locking groove 17 adapted to the locking block 15 is provided at the end of the longitudinal sliding groove 16 on the inner wall of the sleeve 11. The longitudinal sliding groove 16 is arranged along the axial direction of the probe rod 1, and the circumferential locking groove 17 is arranged along the circumference of the probe rod 1. The end of the longitudinal sliding groove 16 is connected to one end of the circumferential locking groove 17, and the locking block 15 can slide within the longitudinal sliding groove 16 and the circumferential locking groove 17.

[0031] In the above embodiment, when two different probe rods 1 need to be connected, firstly, the connecting tube 12 of one probe rod 1 is inserted into the annular groove 14 of the other probe rod 1, and the locking block 15 is moved into the longitudinal slide groove 16. The locking block 15 moves along the longitudinal slide groove 16, and during this process, the annular plate 19 remains pressed against the connecting tube 12 under the elastic force of the elastic element 21. When the locking block 15 slides to the end of the longitudinal slide groove 16, the connecting tube 12 is rotated, causing the locking block 15 to slide into the circumferential locking groove 17. This restricts the movement of the two connecting tubes 12 in the axial direction, thereby connecting the two probe rods 1 together. This design makes connecting two probe rods 1 very simple and improves work efficiency.

[0032] A longitudinal groove 18 is provided on the inner wall of the sleeve 11. The longitudinal groove 18 is arranged along the axial direction of the probe rod 1. One end of the longitudinal groove 18 is connected to the end of the circumferential groove 17 away from the longitudinal slide groove 16. The locking block 15 can slide within the longitudinal groove 18. In this embodiment, when the locking block 15 slides to the end of the circumferential groove 17 away from the longitudinal slide groove 16, the connecting pipe 12, under the action of the annular plate 19 and the elastic element 21, allows the locking block 15 to slide into the longitudinal groove 18. Under the elastic force of the elastic element 21, the locking block 15 can remain within the longitudinal groove 18, restricting the movement of the locking block 15 along the circumferential and axial directions of the probe rod 1, thereby restricting the relative movement of the two probe rods 1 and enhancing the docking effect. It should be noted that when the spring is not subjected to external force, the position of the connecting ring 13 is between the longitudinal groove 18 and the open end of the annular groove 14.

[0033] An annular buffer pad 20, specifically a rubber washer, is fixed to the side of the annular plate 19 away from the spring. When the connecting pipe 12 is inserted into the annular groove 14, one end of the connecting pipe 12 can abut against the annular buffer pad 20. The annular buffer pad 20 replaces the annular plate 19 in contact with the connecting pipe 12. This reduces wear between components and extends the service life of the pipe. It also provides a certain sealing effect at the connection between the two probe rods 1.

[0034] The inner diameter of the connecting tube 12 is larger than the outer diameter of the probe rod 1. A rubber layer (not shown in the figure) is provided on the inner wall of the connecting tube 12, and one end of the connecting tube 12 is in an interference fit with the probe rod 1. In this embodiment, by providing this rubber layer, when the connecting tube 12 is inserted into the annular groove 14, the connecting tube 12 is fitted onto one end of the probe rod 1 through an interference fit, and the rubber layer directly contacts the outer wall of the probe rod 1, further enhancing the sealing performance of the connection between the two probe rods 1. The end of the connecting tube 12 away from the probe rod 1 is designed with a rounded corner structure, facilitating smoother insertion of the connecting tube 12 into the annular groove 14. Two locking blocks 15 are fixed on the connecting tube 12, and two longitudinal sliding grooves 16, circumferential locking grooves 17, and longitudinal locking grooves 18 are also provided on the inner wall of the sleeve 11. This arrangement enhances the tightness of the connection between the two probe rods 1.

[0035] In the above embodiments, the pumping system is existing technology. In order to facilitate the connection between the insertion rod and the pumping system, one of the probe rods 1 is selected as the tail rod. The tail rod is provided with a sleeve 11, a connecting ring 13 and other structures at one end, and its other end is a standard tube, which is convenient to connect to the water pipe of the pumping system through a water pipe joint. Regardless of the drilling depth, this tail rod is used as the last pipe, and its standard end protrudes outside the drill hole.

[0036] On the other hand, this embodiment also proposes a tunnel cross-hole CT detection device, such as... Figure 1 As shown, the device includes a seismic wave transmitting unit and a seismic wave receiving unit. The seismic wave transmitting unit includes at least one transmitting probe and a rod as described above. The seismic wave receiving unit includes at least one receiving probe 5 and a rod as described above. Both the transmitting probe and the receiving probe 5 are fixedly equipped with a collar 10. A locking member 9 is provided between the collar 10 and the mounting part 4. Both the transmitting probe and the receiving probe 5 can be fixedly mounted on the detection rod 1 by the locking member 9. In this embodiment, the locking member 9 is a bolt, and the collar 10 is Ω-shaped.

[0037] When there are multiple transmitting probes, the multiple transmitting probes are connected end to end in sequence through wire 6.

[0038] When there are multiple receiving probes 5, the multiple receiving probes 5 are connected end to end in sequence through wires 6.

[0039] For example, the specific operation of this embodiment is as follows: Along the tunnel axis, several holes are drilled at the tunnel face. These holes are distributed on both sides, above, and below the tunnel face, and the holes are diverging along the tunnel axis to obtain a larger detection range. One hole is a transmitting hole, and all the remaining holes are receiving holes. The transmitting hole is preferably inclined downward along the tunnel axis.

[0040] The probe rods 1 are assembled one by one to form the insertion rod body and inserted into the hole. Regardless of the hole, the probe rod 1 with roller 3 is used as the first rod to enter the hole, and the probe rod 1 with the standard end is used as the tail rod. In the launching hole, there is preferably one launching probe, which is fixedly installed at the front end of the corresponding insertion rod body. In the receiving hole 7, there are preferably multiple receiving probes 5, such as one receiving probe 5 every 0.5 meters or 1 meter. Adjacent receiving probes 5 are connected by wires 6. After each probe rod 1 is assembled, the receiving probe 5 is fixed to the assembled probe rod 1 until the insertion rod body is assembled and fully inserted into the receiving hole 7. The insertion rod body is then fixed in the receiving hole 7, and each receiving probe 5 forms a receiving node in the receiving hole 7. In the horizontal and upward-sloping receiving holes 7, a sealing structure 22 is required to seal the hole opening. Well fluid 23 is filled into each hole through a pumping system. In the launching hole, the launching probe excites... When seismic waves are emitted, all receiving probes 5 in the receiving holes 7 simultaneously receive the seismic waves to detect the rock mass. Then, the rod body in the transmitting hole is moved outward and the transmitting probe is moved to the next transmitting node (corresponding to the spacing of the receiving nodes) for another detection. When the rod body in the transmitting hole has moved outward for a long time, the detection rod 1 at the outer end of the rod body can be removed. The removal operation is the reverse of the installation operation of the detection rod 1. That is, the locking block 15 of one detection rod 1 slides out of the longitudinal locking groove 18, circumferential locking groove 17, and longitudinal sliding groove 16 of another detection rod 1 in sequence. The details are not elaborated here. Repeat the above operation to generate seismic waves at all transmitting nodes one by one to complete the detection operation. Finally, each structure is removed in sequence.

[0041] The above embodiments are merely preferred embodiments provided to fully illustrate the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present utility model are all within the protection scope of the present utility model.

Claims

1. A type of insertion rod, characterized in that: The device includes a probe body, which is composed of several probes connected end to end in sequence. Adjacent probes are detachably and sealed together. Each probe is fixedly fitted with a mounting ring, and the mounting ring is provided with a mounting part.

2. The insertion rod according to claim 1, characterized in that: At least one of the probe rods is equipped with a roller.

3. The insertion rod according to claim 1, characterized in that: Each of the aforementioned probes has a central through hole.

4. The insertion rod according to claim 1, characterized in that: One end of one of the probe rods is provided with a sleeve, and the remaining probe rods are all provided with sleeves at one end and a connecting tube is fixedly provided at the other end. A connecting ring is fixedly provided at the end of the sleeve near the connecting tube. The connecting ring is fixed to the outer wall of the probe rod. The inner wall of the sleeve, the outer wall of the probe rod, and one side of the connecting ring together form an annular groove for the connecting tube of another probe rod to be inserted. An annular plate that can abut against one end of the connecting tube is slidably installed in the annular groove. An elastic element is installed between the annular plate and the connecting ring. A locking block is fixedly provided on the outer wall of the connecting tube. A longitudinal sliding groove that matches the locking block is provided on the inner wall of the sleeve. A circumferential locking groove that matches the locking block is provided at the end of the longitudinal sliding groove on the inner wall of the sleeve.

5. The insertion rod according to claim 4, characterized in that: The longitudinal groove is arranged along the axial direction of the probe rod, and the circumferential groove is arranged along the circumference of the probe rod. The end of the longitudinal groove is connected to one end of the circumferential groove, and the locking block can slide within the longitudinal groove and the circumferential groove.

6. The insertion rod according to claim 5, characterized in that: A longitudinal groove is provided on the inner wall of the sleeve. The longitudinal groove is arranged along the axis of the probe rod. One end of the longitudinal groove is connected to the end of the circumferential groove away from the longitudinal slide groove. The locking block can slide in the longitudinal groove.

7. The insertion rod according to claim 4, characterized in that: The elastic element is a spring, one end of which is fixed to the connecting ring, and the other end of which is fixed to the annular plate.

8. The insertion rod according to claim 7, characterized in that: An annular buffer pad is fixed to the side of the annular plate away from the spring.

9. The insertion rod according to claim 4, characterized in that: The inner diameter of the connecting tube is larger than the outer diameter of the probe rod. The inner wall of the connecting tube is provided with a rubber layer, and the connecting tube and one end of the probe rod are interference fit.

10. A tunnel cross-hole CT detection device, characterized in that: The device includes a seismic wave transmitting unit and a seismic wave receiving unit. The seismic wave transmitting unit includes at least one transmitting probe and a rod as described in any one of claims 1-9. The seismic wave receiving unit includes at least one receiving probe and a rod as described in any one of claims 1-9. Both the transmitting probe and the receiving probe are fixedly provided with collars, and a locking device is provided between the collars and the mounting part. Both the transmitting probe and the receiving probe can be fixedly installed on the detection rod by the locking device. When there are multiple transmitting probes, the multiple transmitting probes are connected end to end in sequence by wires; When there are multiple receiving probes, the multiple receiving probes are connected end to end in sequence by wires.

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