Tunnel safety monitoring system

Abstract

The invention discloses a tunnel safety monitoring system, and belongs to the technical field of tunnel construction monitoring, the tunnel safety monitoring system comprises an embedded pipe embedded in a duct piece, the outer end of the embedded pipe extends along the normal direction of the duct piece and passes through a grouting layer, the inner side of the embedded pipe is cooperatively provided with a rock-soil drilling cylinder, and the rock-soil drilling cylinder can move along the axial direction of the embedded pipe. A pressure supporting assembly is installed in the rock-soil drilling barrel in the axial direction in a sliding mode, and a soil pressure detector is installed at the outer end of the pressure supporting assembly. The outer end of the rock-soil drilling barrel is connected with a sealing cover, the sealing cover is installed in a step groove formed in the outer end of the rock-soil drilling barrel, one end of the sealing cover is hinged to the rock-soil drilling barrel, and the other end of the sealing cover is limited through the step groove. An elastic pre-tightening device used for providing covering pre-tightening force for the sealing cover is installed between the sealing cover and the rock-soil drilling barrel. The system provided by the invention can test the soil pressure of rock soil with different depths, thereby providing comprehensive monitoring data for the tunnel construction process.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a tunnel safety monitoring system. Background Art

[0002] There are many potential safety hazards in the construction process of tunnels, among which tunnel collapse is one of the most dangerous situations that cause loss of life and property. In the prior art, when constructing a tunnel, it is necessary to reinforce the tunnel during the construction process. However, if the tunnel environment changes, for example, the rock on the tunnel wall is soaked in water, causing the weight of the rock to increase, it is difficult to detect the stress changes in the tunnel wall in time, and it is also difficult to take corresponding reinforcement measures, which may cause safety hazards to the tunnel. Therefore, it is necessary to monitor the soil pressure regularly. In the traditional method of monitoring the soil pressure on the surface of the tunnel segment, the soil pressure gauge is pre-buried on the surface of the segment and fixed by the grouting layer on the back of the segment to monitor the soil pressure. However, this method cannot test the soil pressure of rock and soil at different depths, and is prone to problems such as incomplete monitoring data. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a tunnel safety monitoring system that can test the earth pressure of rock and soil at different depths, thereby providing comprehensive monitoring data for the tunnel construction process.

[0004] In order to achieve the above object, the present invention provides the following technical solutions: A tunnel safety monitoring system disclosed in the present invention comprises a pre-buried pipe pre-buried in a pipe segment, the outer end of the pre-buried pipe extends along the normal direction of the pipe segment and passes through a grouting layer, a geotechnical drill barrel is cooperatively installed on the inner side of the pre-buried pipe, the geotechnical drill barrel can be displaced along the axial direction of the pre-buried pipe, a pressure support assembly is axially slidably installed in the geotechnical drill barrel, an earth pressure detector is installed on the outer end of the pressure support assembly; a cover is connected to the outer end of the geotechnical drill barrel, the cover is installed in a step groove provided at the outer end of the geotechnical drill barrel, one end of the cover is hinged to the geotechnical drill barrel, the other end of the cover is limited by the step groove, and an elastic pre-tightening device for providing a covering pre-tightening force for the cover is installed between the cover and the geotechnical drill barrel.

[0005] Furthermore, an open groove is provided on the surface of the cover, and at least one group of ground-breaking components is installed in the open groove, and the ground-breaking components include a first connecting rod, a second connecting rod and a sliding rod, one end of the first connecting rod is hinged to the inner wall of the open groove, the other end of the first connecting rod is hinged to one end of the second connecting rod, and the other end of the second connecting rod is hinged to the sliding rod, and the sliding rod is slidably arranged in a sliding groove opened on the inner wall of the open groove; the sliding rod is also connected to a pushing assembly, and when the pressure support assembly moves axially outward, the pushing assembly can push the sliding rod to move toward the side where the first connecting rod is located.

[0006] Furthermore, a first piston channel is opened on the inner side of the cover, a second piston channel is opened on the inner side of the geotechnical drill barrel, the pushing assembly includes a first piston, a third connecting rod, a connecting hose, a second piston, a push rod, and a push plate, the first piston channel and the second piston channel are connected through a connecting hose, the first piston is slidably arranged in the first piston channel, the first piston is hinged to the sliding rod through the third connecting rod, the second piston is slidably arranged in the second piston channel, the lower end of the second piston is connected to the push plate through the push rod, and the pressure support assembly is provided with a notch corresponding to the push plate.

[0007] Furthermore, a spring is provided between the push plate and the rock drill tube, and the spring is sleeved on the outside of the push rod.

[0008] Furthermore, a plurality of excavation teeth are provided at the outer end of the geotechnical drill tube, and the excavation teeth are evenly installed on the outer side of the geotechnical drill tube along the circumferential direction.

[0009] Furthermore, the elastic preload device comprises a reset torsion spring, and a mounting groove for mounting the reset torsion spring is provided at the outer end of the geotechnical drill tube, and two ends of the reset torsion spring are respectively connected to the sealing cover and the geotechnical drill tube.

[0010] Furthermore, the pressure support assembly includes a base, a guide rod, a bottom support plate, a hydraulic telescopic device and a support assembly, the base is fixed to one end of the guide rod, the other end of the guide rod is connected to the support assembly, the bottom support plate is fixed to the middle of the guide rod, the bottom support plate is detachably connected to the lower end of the geotechnical drill barrel, the hydraulic telescopic device is installed on the bottom support plate, and the output end of the hydraulic telescopic device is connected to the support assembly.

[0011] Furthermore, the support assembly includes a support rod, an upper piston plate and a lower piston plate fixed at the upper and lower ends of the support rod, the upper piston plate and the lower piston plate are simultaneously slidably and sealedly cooperated with the inner wall of the geotechnical drill tube, a water-containing cavity is formed between the upper piston plate and the lower piston plate, and a plurality of water-permeable holes are opened on the upper piston plate.

[0012] The beneficial effects of the present invention are: The invention discloses a tunnel safety monitoring system. When the depth of soil pressure detection needs to be changed, the rock and soil drill tube can be first drilled to the monitoring position, and then withdrawn to reduce the resistance at the drilling position; and then the pressure support assembly with the soil pressure detector is pushed into the monitoring position to reduce the damage to the soil pressure detector. The rock and soil drill tube plays the role of leading drilling in the whole process, which can not only improve the drilling efficiency, but also effectively protect the soil pressure detector.

[0013] The monitoring system disclosed in the present invention can shield the rock and soil by setting a cover, so that the rock and soil drill tube can be drilled smoothly. When the pressure support component is pushed in, the cover can be opened in time to avoid obstruction to the push-in of the pressure support component and the soil pressure detector, making the whole process smoother and increasing the stability of the device when in use.

[0014] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration: Figure 1 It is a structural schematic diagram of the safety monitoring system of the present invention; Figure 2 for Figure 1 The enlarged view of point A in the middle; Figure 3 for Figure 1 The enlarged view of point B in the middle; Figure 4 Schematic diagram of the structure of the rock drill tube Figure 1 ; Figure 5 Schematic diagram of the structure of the rock drill tube Figure 2 ; Figure 6 for Figure 5 Enlarged view of point C in the middle.

[0016] The markings in the accompanying drawings are as follows: pipe segment 1, embedded pipe 2, grouting layer 3, geotechnical drill tube 4, pressure support assembly 5, soil pressure detector 6, cover 7, step groove 8, opening groove 9, first connecting rod 10, second connecting rod 11, sliding rod 12, sliding groove 13, first piston channel 14, second piston channel 15, first piston 16, third connecting rod 17, connecting hose 18, second piston 19, push rod 20, push plate 21, notch 22, spring 23, excavation tooth 24, reset torsion spring 25, mounting groove 26, base 27, guide rod 28, bottom support plate 29, hydraulic telescopic device 30, support rod 31, upper piston plate 32, lower piston plate 33, water containing chamber 34. DETAILED DESCRIPTION

[0017] like Figures 1 to 6As shown, a tunnel safety monitoring system disclosed in the present invention comprises a pre-buried pipe 2 pre-buried in a pipe segment 1, and the outer end of the pre-buried pipe 2 extends along the normal direction of the pipe segment 1 and passes through a grouting layer 3. The pipe segment 1 is arc-shaped, and a grouting layer 3 is provided between the outer side and the rock and soil. It can be understood that the length of the pre-buried pipe 2 is greater than the thickness of both, which can facilitate the grouting molding of the grouting layer 3. After molding, the pre-buried pipe 2 is fixed in the pipe segment 1 and cannot be moved.

[0018] In the embodiment of the present invention, a geotechnical drill tube 4 is installed on the inner side of the embedded pipe 2. The geotechnical drill tube 4 is coaxial with the embedded pipe 2 and its outer wall is threadedly connected to the inner wall of the embedded pipe 2. By rotating the geotechnical rotary drum, the length of the geotechnical drill tube 4 extending into the embedded pipe 2 can be changed. Continuously spiraling and rotating can make the drilling of the geotechnical drill tube 4 smoother.

[0019] In some other embodiments, the geotechnical drill tube 4 and the embedded pipe 2 may also be slidably matched, but the threaded method is not only convenient for controlling the drilling process of the geotechnical drill tube 4, but also has a sealing effect. Specifically, the geotechnical drill tube 4 of the present invention can be displaced along the axial direction of the embedded pipe 2. Regardless of the matching method between the two, the geotechnical drill tube 4 can be relatively displaced with the embedded pipe 2, thereby realizing the change of the drilling depth, which plays a role in opening up a channel for the subsequent test depth of the earth pressure detector 6.

[0020] Specifically, a pressure support assembly 5 is axially slidably installed in the geotechnical drill tube 4. The pressure support assembly 5 is also in the shape of a long column as a whole, and an earth pressure detector 6 is installed on the outer end of the pressure support assembly 5. When the depth of earth pressure detection needs to be changed, the geotechnical drill tube 4 can be drilled to the monitoring position first, and then it can be retracted to reduce the resistance at the drilling position; then the pressure support assembly 5 with the earth pressure detector 6 is pushed into the monitoring position to reduce damage to the earth pressure detector 6.

[0021] In the embodiment of the present invention, the earth pressure detector 6 is arranged in the groove opened at the upper end of the pressure support assembly 5. By burying it in the groove, it is possible to avoid hard contact with the rock and soil during excavation. After the rock and soil move, it can act normally on the earth pressure detector 6, so as to facilitate monitoring thereof.

[0022] Furthermore, the outer end of the geotechnical drill tube 4 of the present invention is connected with a cover 7, and the cover 7 is installed in a step groove 8 provided at the outer end of the geotechnical drill tube 4. One end of the cover 7 is hinged to the geotechnical drill tube 4, and the other end of the cover 7 is limited by the step groove 8. An elastic pre-tightening device for providing a covering pre-tightening force for the cover 7 is installed between the cover 7 and the geotechnical drill tube 4. By providing a cover 7 that can be covered, the rock and soil can be shielded when the geotechnical drill tube 4 is drilling, so that the geotechnical drill tube 4 can drill smoothly. After drilling, the geotechnical drill tube 4 retreats a distance in time to avoid interference with monitoring, and then the pressure support assembly 5 is pushed in, and the cover 7 can be opened in time to avoid obstruction to the pressure support assembly 5 and the soil pressure detector 6, and the whole process is smoother.

[0023] In this embodiment, an open groove 9 is provided on the surface of the cover 7, and at least one group of ground-breaking components is installed in the open groove 9. The ground-breaking components include a first connecting rod 10, a second connecting rod 11 and a sliding rod 12. One end of the first connecting rod 10 is hinged to the inner wall of the open groove 9, the other end of the first connecting rod 10 is hinged to one end of the second connecting rod 11, and the other end of the second connecting rod 11 is hinged to the sliding rod 12. The sliding rod 12 is slidably arranged in a sliding groove 13 opened on the inner wall of the open groove 9; the sliding rod 12 is also connected to a pushing component. When the pressure support component 5 moves axially outward, the pushing component can push the sliding rod 12 to move toward the side where the first connecting rod 10 is located.

[0024] In this embodiment, a first piston channel 14 is further provided on the inner side of the cover 7, and the first piston channel 14 is arranged horizontally. A second piston channel 15 is provided on the inner side of the geotechnical drill tube 4, and the second piston channel 15 is arranged vertically as a whole. The pushing assembly includes a first piston 16, a third connecting rod 17, a connecting hose 18, a second piston 19, a push rod 20, and a push plate 21. The first piston channel 14 and the second piston channel 15 are connected through the connecting hose 18. The first piston 16 is slidably disposed in the first piston channel 14. The first piston 16 is hinged to the slide bar 12 through the third connecting rod 17, and the second piston 19 is slidably disposed in the second piston channel 15.

[0025] In the present invention, the space between the first piston 16 and the second piston 19 is filled with hydraulic oil, which can play a role in hydraulic transmission. The lower end of the second piston 19 is connected to the push plate 21 through the push rod 20, and the pressure support assembly 5 is provided with a notch 22 corresponding to the push plate 21. When the pressure support assembly 5 is pushed in, the notch 22 at the lower end can drive the push plate 21 to move upward. Under the action of the hydraulic pressure, the second piston 19 pushes the first piston 16, and the first piston 16 acts on the sliding rod 12 through the third connecting rod 17, so that the first connecting rod 10 and the second connecting rod 11 are brought closer to each other. The two connecting rods can play a role in breaking the ground, which is more conducive to opening the cover 7 and reducing the interference of rock and soil.

[0026] In this embodiment, a spring 23 is provided between the push plate 21 and the rock drill tube 4. The spring 23 is sleeved on the outside of the push rod 20. The spring 23 can provide an elastic connecting force for the push plate 21 to facilitate the cooperation between the push plate 21 and the notch 22.

[0027] In this embodiment, a plurality of drilling teeth 24 are provided at the outer end of the rock drill tube 4. The drilling teeth 24 are evenly installed on the outer side of the rock drill tube 4 along the circumferential direction, which facilitates the drilling of the rock drill tube 4 and makes the drilling easier.

[0028] In this embodiment, the elastic preload device includes a reset torsion spring 25. The outer end of the geotechnical drill tube 4 is provided with a mounting groove 26 for mounting the reset torsion spring 25. The two ends of the reset torsion spring 25 are respectively connected to the cover 7 and the geotechnical drill tube 4. By setting the above purely mechanical structure, the stability of the structure can be increased.

[0029] In this embodiment, the pressure support assembly 5 includes a base 27, a guide rod 28, a bottom support plate 29, a hydraulic telescopic device 30 and a support assembly. The base 27 is fixed to one end of the guide rod 28, the other end of the guide rod 28 is connected to the support assembly, the bottom support plate 29 is fixed to the middle of the guide rod 28, the bottom support plate 29 is detachably connected to the lower end of the geotechnical drill tube 4, the hydraulic telescopic device 30 is installed on the bottom support plate 29, and the output end of the hydraulic telescopic device 30 is connected to the support assembly. By providing a detachable bottom support plate 29, it is convenient to disassemble the pressure support assembly 5, and the channel will not be blocked under the action of the cover 7. After the pressure support assembly 5 is disassembled, it is convenient to clean and maintain the soil pressure tester, and it is also convenient to clean and maintain the drilling channel of the geotechnical drill tube 4, which increases the life of the device. In order to facilitate the disassembly of the pressure support assembly 5, the connection between the push plate 21 and the push rod 20 can also adopt a detachable connection method, such as a threaded connection.

[0030] In this embodiment, the support assembly includes a support rod 31, an upper piston plate 32 and a lower piston plate 33 fixed at the upper and lower ends of the support rod 31, the upper piston plate 32 and the lower piston plate 33 are simultaneously slidably sealed with the inner wall of the rock drill tube 4, a water chamber 34 is formed between the upper piston plate 32 and the lower piston plate 33, and a plurality of water holes are provided on the upper piston plate 32. By providing the water holes, a part of the groundwater can be received, reducing the interference of the groundwater on the soil pressure tester.

[0031] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A tunnel safety monitoring system, characterized in that: It comprises an embedded pipe embedded in the pipe segment, the outer end of the embedded pipe extends along the normal direction of the pipe segment and passes through the grouting layer, a geotechnical drill barrel is installed on the inner side of the embedded pipe, the geotechnical drill barrel can be displaced along the axial direction of the embedded pipe, a pressure support assembly is installed in the geotechnical drill barrel along the axial sliding direction, and a soil pressure detector is installed on the outer end of the pressure support assembly; a cover is connected to the outer end of the geotechnical drill barrel, the cover is installed in a step groove provided at the outer end of the geotechnical drill barrel, one end of the cover is hinged to the geotechnical drill barrel, the other end of the cover is limited by the step groove, and an elastic pre-tightening device for providing a covering pre-tightening force for the cover is installed between the cover and the geotechnical drill barrel.

2. A tunnel safety monitoring system according to claim 1, characterized in that: An open groove is provided on the surface of the cover, and at least one group of ground-breaking components is installed in the open groove, and the ground-breaking components include a first connecting rod, a second connecting rod and a sliding rod, one end of the first connecting rod is hinged to the inner wall of the open groove, the other end of the first connecting rod is hinged to one end of the second connecting rod, and the other end of the second connecting rod is hinged to the sliding rod, and the sliding rod is slidably arranged in a sliding groove opened on the inner wall of the open groove; the sliding rod is also connected to a pushing assembly, and when the pressure support assembly moves axially outward, the pushing assembly can push the sliding rod to move toward the side where the first connecting rod is located.

3. A tunnel safety monitoring system according to claim 2, characterized in that: A first piston channel is also provided on the inner side of the cover, a second piston channel is provided on the inner side of the geotechnical drill tube, the pushing assembly comprises a first piston, a third connecting rod, a connecting hose, a second piston, a push rod, and a push plate, the first piston channel and the second piston channel are connected via a connecting hose, the first piston is slidably arranged in the first piston channel, the first piston is hinged to the sliding rod via the third connecting rod, the second piston is slidably arranged in the second piston channel, the lower end of the second piston is connected to the push plate via the push rod, and a notch corresponding to the push plate is provided on the pressure support assembly.

4. A tunnel safety monitoring system according to claim 3, characterized in that: A spring is arranged between the push plate and the rock drill tube, and the spring is sleeved on the outer side of the push rod.

5. A tunnel safety monitoring system according to claim 1, characterized in that: A plurality of excavation teeth are arranged at the outer end of the rock drill tube, and the excavation teeth are evenly installed on the outer side of the rock drill tube along the circumferential direction.

6. A tunnel safety monitoring system according to claim 1, characterized in that: The elastic preload device comprises a reset torsion spring. The outer end of the geotechnical drill tube is provided with an installation groove for installing the reset torsion spring. The two ends of the reset torsion spring are respectively connected to the sealing cover and the geotechnical drill tube.

7. A tunnel safety monitoring system according to any one of claims 1 to 6, characterized in that: The pressure support assembly includes a base, a guide rod, a bottom support plate, a hydraulic telescopic device and a support assembly. The base is fixed to one end of the guide rod, the other end of the guide rod is connected to the support assembly, the bottom support plate is fixed to the middle of the guide rod, the bottom support plate is detachably connected to the lower end of the geotechnical drill tube, the hydraulic telescopic device is installed on the bottom support plate, and the output end of the hydraulic telescopic device is connected to the support assembly.

8. A tunnel safety monitoring system according to claim 7, characterized in that: The support assembly includes a support rod, an upper piston plate and a lower piston plate fixed at the upper and lower ends of the support rod, the upper piston plate and the lower piston plate are simultaneously slidably sealed with the inner wall of the geotechnical drill tube, a water chamber is formed between the upper piston plate and the lower piston plate, and a plurality of water permeable holes are opened on the upper piston plate.

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