Tunnel hidden disease detection device based on seismic reflection method

Abstract

The invention discloses a tunnel hidden disease detection device based on a seismic reflection method. The tunnel hidden disease detection device comprises a telescopic rocker arm and a T-shaped cross beam connected with the telescopic rocker arm, one end of the cross beam is provided with an air source gun as a seismic wave source, and the other end is provided with a geophone; the air source gun hammers the tunnel wall of the to-be-detected tunnel under the control of a computer to generate seismic waves; a spring pressing type assembly is arranged at the bottom of the geophone, and the geophone is pressed by the spring pressing type assembly to be tightly attached to the tunnel wall of the to-be-detected tunnel; the geophone is connected with a computer through a data line and transmits collected seismic signals to the computer. And the computer performs tunnel detection based on the seismic reflection method according to the parameters for controlling the hammering of the air source gun and the seismic signals collected by the seismic detector. The problems that electromagnetic waves are difficult to penetrate through segments and the detection depth is insufficient due to the fact that a geological radar is used in existing tunnel detection, and an existing seismic reflection method is low in data collection efficiency and insufficient in data volume in a tunnel are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel detection, and particularly to a device for detecting hidden diseases in tunnels based on the seismic reflection method. Background Art

[0002] In current existing tunnel construction, to ensure good service conditions, a tunnel must have sufficient stiffness, strength, and stability.

[0003] Since a tunnel is a hidden project, it is very difficult to detect it through conventional manual inspections. Usually, it can only be discovered when the hidden diseases in the tunnel develop to a certain extent and water leakage or collapse occurs. By this time, the tunnel diseases have developed to a quite serious level, and the best maintenance opportunity has been missed. Therefore, advanced non-destructive testing must be used to detect subgrade diseases.

[0004] For some existing tunnels that are already old, problems such as water leakage, cracks, and peeling occur frequently. Most of the existing tunnel detections use ground-penetrating radar for detection, and the detection depth is limited.

[0005] In an operating subway tunnel, a layer of segment is often laid on the surface of the tunnel rock mass. The segment has a large thickness, and the electromagnetic wave of the ground-penetrating radar will affect the penetration depth, and it is impossible to detect hidden diseases such as cracks and karst in the rock mass behind the segment.

[0006] The seismic reflection method detection technology is an engineering geophysical exploration technology widely used in the field of engineering construction. It uses a hammer strike as the seismic source, generates reflected waves within a certain frequency range during excitation, propagates forward in the form of pulses, and at the same time, these reflected signals are recorded by a seismograph. By processing the reflected signals, the engineering geological conditions below the test point can be obtained.

[0007] During the existing seismic method detection, geophones are inserted into the surface of the object to be detected at a certain trace interval, and it is ensured that the geophones are stable.

[0008] Then, the geophones are connected to the main cable one by one through cables, and the main cable is connected to the main machine. The seismic source is excited manually using a hammer or using a seismic source vehicle. The seismic source device impacts the surface of the object to be detected to obtain strong and high-quality reflected wave signals. After completion, the detection of the next point is carried out to form a rolling cycle detection.

[0009] Since the invert and side waist of the tunnel are relatively high, the detection personnel need to stand on the support. One holds up the geophone and keeps it still waiting to receive the signal; the other holds up the seismic source hammer to excite upward. The work intensity is large and the efficiency is low, resulting in the difficulty of implementing the existing seismic reflection method in the tunnel environment.

[0010] Therefore, how to solve the problems that when using ground penetrating radar for existing tunnel detection, electromagnetic waves are difficult to penetrate the segment, resulting in insufficient detection depth, and that the existing seismic reflection method has low data acquisition efficiency and insufficient data volume in tunnels has become a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0011] In view of the above-mentioned defects of the prior art, the present invention provides a tunnel hidden disease detection device based on the seismic reflection method, and the achieved purpose is to solve the problems that when using ground penetrating radar for existing tunnel detection, electromagnetic waves are difficult to penetrate the segment, resulting in insufficient detection depth, and that the existing seismic reflection method has low data acquisition efficiency and insufficient data volume in tunnels.

[0012] To achieve the above purpose, the present invention discloses a tunnel hidden disease detection device based on the seismic reflection method, including a telescopic swing arm, and a cross beam connected to the telescopic swing arm in a "T" shape;

[0013] One end of the cross beam is provided with an air shock source gun as a seismic wave source, and the other end is provided with a geophone;

[0014] The air shock source gun generates seismic waves by controlling a hammer to strike the tunnel wall of the tunnel to be detected through a computer;

[0015] A spring pressing component is provided at the bottom of the geophone, and the geophone is pressed tightly against the tunnel wall of the tunnel to be detected through the spring pressing component;

[0016] The geophone is connected to the computer through a data cable, and transmits the collected seismic signals to the computer;

[0017] The computer performs tunnel detection based on the seismic reflection method according to the parameters for controlling the hammering of the air shock source gun and the seismic signals collected by the geophone.

[0018] Preferably, on one side of the cross beam facing the tunnel wall of the tunnel to be detected, a trigger is provided at a position close to the end where the seismic wave source is provided;

[0019] The trigger is connected to the computer through the data cable, and is used to send a signal to the computer when the air shock source gun is tightly attached to the tunnel wall of the tunnel to be detected.

[0020] Preferably, the cross beam is a telescopic cross beam, including two beam bodies that can move relative to each other;

[0021] A V-shaped detection bracket is provided between the telescopic swing arm and the cross beam;

[0022] The V-shaped detection bracket includes a V-shaped bracket connecting rod that is bent into a "V" shape or a "U" shape and has an adjustable angle

[0023] One bent end of the V-shaped support link is fixed to the telescopic swing arm, and the two bifurcations at the other bifurcated end are symmetrically arranged according to the length direction of the telescopic swing arm.

[0024] Both of the two bifurcations of the V-shaped support link are respectively connected to the two beam bodies capable of relative movement with the cross beam by revolute pairs, and can rotate relative to the corresponding beam bodies.

[0025] Preferably, on one side of each beam body facing the tunnel wall of the tunnel to be detected, pulleys are provided at positions close to the suspended end.

[0026] Each pulley protrudes more than 20 mm from the surface where it is located.

[0027] More preferably, the distance between each pulley and the end of the corresponding beam body close to the suspended end is 200 mm.

[0028] Preferably, it further includes a detection platform.

[0029] The detection platform includes a plate-like structure at the bottom and a telescopic upright support provided on the plate-like structure.

[0030] The upper end of the telescopic upright support is connected to a rotating wheel by a revolute pair.

[0031] The rotating wheel is connected to the telescopic swing arm by a revolute pair.

[0032] The axis of rotation of the revolute pair between the rotating wheel and the telescopic upright support is parallel to the telescopic direction of the telescopic upright support.

[0033] The axis of rotation of the revolute pair between the rotating wheel and the telescopic swing arm is perpendicular to the telescopic direction of the telescopic upright support.

[0034] Between the rotating wheel and the telescopic upright support, and between the rotating wheel and the telescopic swing arm, releasable fastening devices are provided to lock the relative positions between the rotating wheel and the telescopic upright support, or between the rotating wheel and the telescopic swing arm through the corresponding releasable fastening devices.

[0035] More preferably, the detection platform is provided with multiple pairs of replaceable rolling wheels.

[0036] Each rolling wheel can be replaced with a wheel for use on flat ground or a wheel for use on the wheel rail of a subway tunnel.

[0037] More preferably, handles are provided at the edge positions of the detection platform corresponding to the allowed forward direction and / or backward direction of the rolling wheels.

[0038] More preferably, a simple table is provided on the detection platform;

[0039] The simple table is fixedly connected to the plate-like structure.

[0040] More preferably, the detection platform adopts the plate-like structure made of aluminum alloy material, with a size of 1800mm×2200mm in the horizontal plane and a thickness of 20mm; the height of the simple table is 500mm; the maximum height after the telescopic upright support is extended is 3.8m.

[0041] Advantages of the present invention:

[0042] The present invention solves the problems that when using a ground-penetrating radar for existing tunnel detection, it is difficult for electromagnetic waves to penetrate the segment, resulting in insufficient detection depth, and the problems that the data acquisition efficiency is low and the data volume is insufficient in the existing seismic reflection method in tunnels.

[0043] The present invention is reasonably designed and convenient to operate, realizing the requirements for large-depth detection on the original rock wall of the tunnel and the detection requirements for deep hidden diseases in the rock behind the segment of the subway tunnel, greatly improving the detection depth, stability and efficiency.

[0044] The following will further illustrate the concept, specific structure and technical effects generated by the present invention with reference to the accompanying drawings, so as to fully understand the purpose, features and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A schematic structural diagram showing a V-shaped detection support provided on the cross beam in an embodiment of the present invention.

[0046] Figure 2 A schematic diagram showing the state of the cross beam being arranged on the detection platform through a telescopic swing arm to detect the tunnel wall of the tunnel to be detected in an embodiment of the present invention.

[0047] Wherein, 1, subway tunnel wheel rail; 2, rolling wheel; 3, detection platform; 4, simple table; 5, telescopic upright support; 6, rotating wheel; 7, telescopic swing arm; 8, V-shaped detection support; 9, data line; 10, V-shaped support connecting rod; 11, cross beam; 12, pulley; 13, seismic wave source; 14, geophone; 15, trigger; 16, data line. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0048] Embodiment

[0049] As Figure 1 shown, a tunnel hidden disease detection device based on the seismic reflection method includes a telescopic swing arm 7 and a cross beam 11 connected to the telescopic swing arm 7 in a "T" shape;

[0050] One end of the crossbeam 11 is provided with an air source gun as the seismic wave source 13, and the other end is provided with a geophone 14;

[0051] The air source gun generates seismic waves by controlling a hammer to strike the tunnel wall of the tunnel to be detected through a computer;

[0052] A spring pressing component is provided at the bottom of the geophone 14, and the geophone 14 is pressed tightly against the tunnel wall of the tunnel to be detected through the spring pressing component;

[0053] The geophone 14 is an instrument used to receive seismic waves. In the present invention, the geophone 14 is arranged on the tunnel wall of the tunnel to be detected, which is similar to collecting data in the air. Therefore, the geophone 14 needs to be close to the wall to better receive seismic wave signals. So, a spring pressing component is arranged at the bottom of the geophone, and the sampling end of the geophone 14 is pressed tightly against the tunnel wall of the tunnel to be detected through the spring pressing component.

[0054] The geophone 14 is connected to a computer through a data line 16, and transmits the collected seismic signals to the computer;

[0055] The computer performs tunnel detection based on the seismic reflection method according to the parameters for controlling the hammering of the air source gun and the seismic signals collected by the geophone 14.

[0056] In the present invention, data connection is realized between the computer and the air source gun and the geophone 14 through the data line 16 arranged on the crossbeam 11 and the telescopic swing arm 7, and rapid tunnel detection based on the seismic reflection method is realized.

[0057] In some embodiments, on one side of the crossbeam 11 facing the tunnel wall of the tunnel to be detected, at a position near one end where the seismic wave source 13 is provided, a trigger 16 is provided;

[0058] The trigger 16 is connected to the computer through a data line 16, and is used to send a signal to the computer when the air source gun is close to the tunnel wall of the tunnel to be detected.

[0059] The setting of the trigger 16 can realize automatic excitation of the seismic wave source and automatic reception of seismic waves.

[0060] In some embodiments, the crossbeam 11 is a telescopic crossbeam, including two beam bodies that can move relative to each other;

[0061] A V-shaped detection bracket 8 is provided between the telescopic swing arm 7 and the crossbeam 11;

[0062] The V-shaped detection bracket 8 includes a V-shaped bracket connecting rod 10 that is bent into a "V" shape or a "U" shape, and the angle can be adjusted

[0063] One bent end of the V-shaped support link 10 is fixed to the telescopic swing arm 7, and the two bifurcations at the other bifurcated end are symmetrically arranged according to the length direction of the telescopic swing arm 7;

[0064] Both of the two bifurcations of the V-shaped support link 10 are respectively connected with a revolute pair between the two beam bodies that can move relative to the cross beam 11, and can both rotate relative to the corresponding beam body.

[0065] In practical applications, the structure in which both of the two bifurcations of the V-shaped support link 10 are respectively connected with a revolute pair between the two beam bodies that can move relative to the cross beam 11 enables the user to extend or shorten the cross beam 11 by adjusting the angle between the two bifurcations, realizing the function of adjustable distance between the shot interval vibrator and the geophone.

[0066] In some embodiments, on one side of each beam body facing the tunnel wall to be detected, a pulley 12 is provided near the suspended end position;

[0067] Each pulley 12 protrudes more than 20 mm from the surface where it is located.

[0068] On one side of each beam body of the cross beam 11 facing the tunnel wall to be detected, a pulley 12 is provided near the suspended end position, and each pulley 12 protrudes more than 20 mm from the surface where it is located, which can facilitate the movement of the cross beam 11 and the V-shaped detection support 8 along the length direction of the tunnel during detection.

[0069] In some embodiments, the distance between each pulley 12 and the end of the corresponding beam body near the suspended end is 200 mm.

[0070] As Figure 2 shown, in some embodiments, a detection platform 3 is further included;

[0071] The detection platform 3 includes a plate-like structure at the bottom and a telescopic upright support 5 provided on the plate-like structure;

[0072] The upper end of the telescopic upright support 5 is connected with a rotating wheel 6 by a revolute pair;

[0073] The rotating wheel 6 is connected with the telescopic swing arm 7 by a revolute pair;

[0074] The axis of rotation of the revolute pair between the rotating wheel 6 and the telescopic upright support 5 is parallel to the telescopic direction of the telescopic upright support 5;

[0075] The axis of rotation of the revolute pair between the rotating wheel 6 and the telescopic swing arm 7 is perpendicular to the telescopic direction of the telescopic upright support 5;

[0076] A releasable fastening device is provided between the rotating wheel 6 and the telescopic upright support 5, and also between the rotating wheel 6 and the telescopic swing arm 7. The relative position between the rotating wheel 6 and the telescopic upright support 5, or between the rotating wheel 6 and the telescopic swing arm 7 is locked through the corresponding releasable fastening device.

[0077] In practical applications, the rotating wheel 6 that forms a revolute pair with the telescopic upright support 5 can rotate around the telescopic direction of the telescopic upright support 5, and can adjust the rotation axis of the telescopic swing arm 7 to be consistent with the advancing direction of the tunnel to be detected.

[0078] In some embodiments, the detection platform 3 is provided with multiple pairs of replaceable rolling wheels 2;

[0079] Each rolling wheel 2 can be replaced with a wheel for use on flat ground or a wheel for use on the subway tunnel wheel rail 1.

[0080] In practical applications, the replaceable rolling wheels 2 can travel on the 1435mm subway standard track or on flat ground.

[0081] In some embodiments, the detection platform 3 is provided with a handle at the edge position corresponding to the forward direction and / or the backward direction allowed by the rolling wheels 2.

[0082] In practical applications, the setting of the handle facilitates pulling forward or backward.

[0083] In some embodiments, a simple table 4 is provided on the detection platform 3;

[0084] The simple table 4 is fixedly connected to the plate-like structure.

[0085] In practical applications, the simple table 4 and the detection platform 3 are made of the same material of metal and are fixed to the plate-like structure by welding, so as to facilitate on-site data collection by users.

[0086] In some embodiments, the detection platform 3 is a plate-like structure made of aluminum alloy material, with a size of 1800mm×2200mm in the horizontal plane and a thickness of 20mm; the height of the simple table 4 is 500mm; the maximum height after the telescopic upright support 5 is extended is 3.8m.

[0087] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations according to the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. A tunnel hidden disease detection device based on seismic reflection method; characterized in that: It comprises a telescopic rocker arm (7) and a crossbeam (11) connected to the telescopic rocker arm (7) in a T-shape; One end of the crossbeam (11) is provided with an air source gun as a seismic wave source (13), and the other end is provided with a seismic detector (14); The air seismic source gun generates seismic waves by hammering the tunnel wall of the tunnel to be inspected under computer control; A spring pressing component is provided at the bottom of the seismic detector (14), and the spring pressing component is used to press the seismic detector (14) closely against the tunnel wall of the tunnel to be detected; The seismic detector (14) is connected to the computer via a data line (16) to transmit the collected seismic signals to the computer; The computer performs tunnel detection based on the seismic reflection method according to the parameters controlling the hammering of the air source gun and the seismic signals collected by the seismic detector (14).

2. The tunnel hidden disease detection device based on seismic reflection method according to claim 1 is characterized in that: A trigger (16) is provided on one side of the cross beam (11) facing the tunnel wall of the tunnel to be inspected, near one end where the seismic wave source (13) is provided; The trigger (16) is connected to the computer via the data line (16) and is used to send a signal to the computer when the air seismic source gun is in close contact with the tunnel wall of the tunnel to be detected.

3. The tunnel hidden disease detection device based on seismic reflection method according to claim 1 is characterized in that: The crossbeam (11) is a telescopic crossbeam, comprising two beam bodies that can move relative to each other; A V-shaped detection bracket (8) is provided between the telescopic rocker arm (7) and the crossbeam (11); The V-shaped detection bracket (8) comprises a V-shaped bracket connecting rod (10) which is bent into a "V" shape or a "U" shape and has an adjustable angle. One bent end of the V-shaped bracket connecting rod (10) is fixed to the telescopic rocker arm (7), and two forks at the other forked end are symmetrically arranged according to the length of the telescopic rocker arm (7); The two forks of the V-shaped bracket connecting rod (10) are respectively connected to the two beam bodies of the cross beam (11) that can move relatively to each other in a revolving pair, and can rotate relative to the corresponding beam body.

4. The tunnel hidden disease detection device based on seismic reflection method according to claim 1 is characterized in that: A pulley (12) is provided on one side of each beam body facing the tunnel wall of the tunnel to be inspected, near the end portion which is suspended in the air; Each of the pulleys (12) protrudes from the surface by more than 20 mm.

5. The device for detecting hidden tunnel defects based on seismic reflection method according to claim 4 is characterized in that: The distance between each pulley (12) and the end portion of the corresponding suspended end of the beam body is 200 mm.

6. The tunnel hidden disease detection device based on seismic reflection method according to claim 1 is characterized in that: Also included is a detection platform (3); The detection platform (3) comprises a plate-like structure at the bottom, and a retractable vertical support (5) arranged on the plate-like structure; The upper end of the retractable upright support (5) is connected to the rotating wheel (6) via a swivel pair; The rotating wheel (6) is connected to the telescopic rocker arm (7) via a slewing pair; The rotary axis of the rotary pair between the rotating wheel (6) and the telescopic upright support (5) is parallel to the telescopic direction of the telescopic upright support (5); The rotary axis of the rotary pair between the rotating wheel (6) and the telescopic rocker arm (7) is perpendicular to the telescopic direction of the telescopic upright support (5); A releasable fastening device is provided between the rotating wheel (6) and the telescopic upright support (5), and between the rotating wheel (6) and the telescopic rocker arm (7). The relative position between the rotating wheel (6) and the telescopic upright support (5), or between the rotating wheel (6) and the telescopic rocker arm (7), is locked by the corresponding releasable fastening device.

7. The device for detecting hidden tunnel defects based on seismic reflection method according to claim 6 is characterized in that: The detection platform (3) is provided with a plurality of pairs of replaceable rolling wheels (2); Each of the rolling wheels (2) can be replaced with a wheel used on flat ground or a wheel used in a subway tunnel wheel rail (1).

8. The device for detecting hidden tunnel defects based on seismic reflection method according to claim 7 is characterized in that: The detection platform (3) is provided with a handle at an edge position corresponding to the forward direction and / or backward direction allowed by the rolling wheel (2).

9. The device for detecting hidden tunnel defects based on seismic reflection method according to claim 7, characterized in that: A simple table (4) is provided on the detection platform (3); The simple table (4) is fixedly connected to the plate-like structure.

10. The device for detecting hidden tunnel defects based on seismic reflection method according to claim 9, characterized in that: The detection platform (3) is a plate-like structure made of aluminum alloy material, with a horizontal dimension of 1800 mm×2200 mm and a thickness of 20 mm; the height of the simple table (4) is 500 mm; and the maximum height of the retractable vertical support (5) after extension is 3.8 m.

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