KR20020088224A - System for assessing safety of tunnel concrete lining based on seismic measurements and method thereof - Google Patents

Abstract

PURPOSE: A system and method is provided to achieve improved accuracy and efficiency of tunnel concrete lining safety diagnosis, while preventing noise and improving reliability of obtained data. CONSTITUTION: A tunnel concrete lining safety diagnosis system, comprises a frame movable along the surface of tunnel concrete lining; a migration length measurement unit mounted to the frame, and which measures migration length of the frame; a first striking unit(30) and a second striking unit(40) installed to the frame, in such a manner that first and second striking units generate seismic wave by striking surface of a tunnel concrete lining(1); a first sensor(60) and a second sensor(61) arranged to the frame, and which sense seismic wave generated from striking action of first and second striking units; a first press unit(70) and a second press unit(80) installed to the frame, and which permit first and second sensors to contact surface of the tunnel concrete lining; and a control unit for controlling first and second striking units and first and second press units.

Description

Tunnel Concrete Lining Local Seismic Safety Diagnosis System Using Seismic Exploration Technique and Its Method {SYSTEM FOR ASSESSING SAFETY OF TUNNEL CONCRETE LINING BASED ON SEISMIC MEASUREMENTS AND METHOD THEREOF}

The present invention relates to a tunnel concrete lining local precision safety diagnosis system and method thereof, and more particularly, to a tunnel concrete lining local precision safety diagnosis system using seismic surveying technique for evaluating the structural safety of tunnel concrete lining. And to a method thereof.

Concrete linings, concrete slabs and walls of tunnels have a reduced load capacity and durability due to prolonged cracking, leakage, peeling, cavitation and neutralization, so safety should be checked and evaluations for maintenance and repair should be carried out periodically. Structural safety, such as the thickness and shear stiffness of tunnel concrete linings, was evaluated using various non-permeability tests such as Rebound Hardness Test, Impact Echo Method, and Ground Penetrating Radar (GPR). Is being evaluated.

In the resilience hardness test, the surface of a good tunnel concrete lining is selected as a test site to remove unevenness, and the strength of the tunnel concrete lining is estimated by hitting 20 times with a Schmidt Hammer and averaging the rebound hardness read from the Schmidt hammer. The impact echo technique evaluates the safety of tunnel concrete lining by the wave form in which the volume wave generated by impacting the surface of the tunnel concrete lining is reflected at the interface between discontinuous surfaces or heterogeneous media layers and returns to the surface. In addition, the underground exploration radar analyzes the reflected waves that are transmitted by reflecting electromagnetic waves through the tunnel concrete lining and investigates the two-dimensional layer structure in the distance-depth dimension of the tunnel concrete lining.

However, the strength of the concrete lining calculated by the repulsion hardness test of the prior art has an inaccurate disadvantage, and the impact echo technique has a problem that data interpretation and analysis are quite difficult and the measurement results are inaccurate. In addition, the thickness of the tunnel concrete lining estimated by the underground survey radar also has a low reliability problem.

The present invention has been made to solve the various disadvantages and problems of the prior art as described above, the object of the present invention is to use the surface destruction method and the crystal impact echo method combined local precision safety diagnosis of tunnel concrete lining accurately and efficiently To provide a local precision safety diagnosis system and tunnel tunnel lining using seismic survey method that can be implemented by the method.

It is still another object of the present invention to provide a tunnel concrete lining local safety diagnosis system using the seismic detection technique which can quickly perform local precision safety diagnosis of tunnel concrete lining while freely moving by a simple structure, and a method thereof.

It is still another object of the present invention to provide a tunnel concrete lining local precision safety diagnosis system and method using an acoustic wave sensing technique that can improve the reliability of data obtained by eliminating noise.

A feature of the present invention for achieving this object is a frame that can move along the surface of the tunnel concrete lining; Moving distance measuring means mounted on the frame to measure the moving distance of the frame; First and second striking means installed on the frame so as to strike the surface of the tunnel concrete lining to generate a seismic wave; A first damping sensor and a second damping sensor provided in the frame so as to sense an elastic wave generated by the striking of the first striking means and the second striking means; First pressing means and second pressing means installed on the frame to allow the first sensing sensor and the second sensing sensor to contact the surface of the tunnel concrete lining; In the tunnel concrete lining local safety diagnosis system using the seismic detection method comprising a first striking means and a second striking means and a control means for controlling the first pressurizing means and the second pressurizing means.

Another aspect of the present invention includes the steps of contacting the first sensing sensor and the second sensing sensor provided in the frame that can move along the surface of the tunnel concrete lining to the exploration point of the tunnel concrete lining; A first seismic wave generating step of generating a seismic wave by striking an exploration point of the tunnel concrete lining by a first striking means arranged in a center between a first sensing sensor and a second sensing sensor; A first seismic wave detection step of detecting the seismic waves by the first and second seismic sensors; A first data processing step of processing data of the first sensing sensor and the second sensing sensor; A second seismic wave generating step of generating an elastic wave by striking an exploration point of the tunnel concrete lining by second striking means arranged in one direction of the first sensing sensor and the second sensing sensor; A second acoustic wave sensing step of sensing the acoustic wave by the first sensing sensor and the second sensing sensor; Tunnel concrete lining local precision safety diagnosis method using the seismic detection method including a second data processing step for processing data of the first and second sensing sensors.

1 is a perspective view showing the configuration of a tunnel concrete lining local precision safety diagnosis system according to the present invention,

2 is a control block diagram of a tunnel concrete lining local precision safety diagnosis system according to the present invention,

3 is a cross-sectional view showing the configuration of a frame, first and second striking devices, first and second sensing sensors and first and second pressing means according to the present invention;

Figure 4 is a cross-sectional view partially showing the configuration of the frame and the first and second striking device according to the present invention,

5 is a cross-sectional view partially showing a configuration of a frame, first and second sensing sensors and first and second pressing means according to the present invention;

Figure 6 is a perspective view showing a partially separated configuration of the transport distance measuring apparatus according to the present invention,

7 is a flowchart illustrating a tunnel concrete lining local precision safety diagnosis method according to the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

10: frame 20: moving distance measuring device

23: rotary encoder 27: moving distance indicator

30, 40: first and second striking devices 32, 42: solenoid

33, 43: Strike 50: Controller

51: voltage regulator 60, 61: first and second damping sensor

70, 80: first and second pressurizers 72, 82: air cylinder

90: air supply unit 92: air conditioning controller

100: dustproof member 110: computer

Hereinafter, a preferred embodiment of the tunnel concrete lining local precision safety diagnosis system and method using the seismic detection method according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 6 are views for explaining a local concrete safety diagnosis system for tunnel concrete lining using the seismic detection method according to the present invention. First, referring to FIGS. 1 and 3, the safety diagnosis system of the present invention includes a frame 10 having a narrow width and a long length. In the frame 10, the first to fourth mounting holes 11a to 11d are formed at a predetermined distance along the longitudinal direction, and the first to fourth mounting holes 11a to 11d are formed on both side surfaces of the frame 10. Screw holes 12 communicating with each other are formed. The first mounting hole 11a is formed at the center between the third mounting hole 11c and the fourth mounting hole 11d, and the distance between the second mounting hole 11b and the third mounting hole 11c is formed. The distance between the third mounting holes 11c and the fourth mounting holes 11d is kept the same. Wheel 13 is mounted to the front of the lower surface of the frame 10 for free movement, and the handle 14 is attached to one side of the upper surface.

1 and 6, the moving distance measuring device 20 for measuring the moving distance of the frame 10 is mounted to the rear of the frame 10. The moving distance measuring device 20 has a pair of wheels 22 fixedly mounted at both ends of the wheel shaft 21, and the wheels 22 of the moving distance measuring device 20 are wheels of the frame 10. In cooperation with 13) keep the movement of the frame 10 stable and smooth. The rotary encoder 23 is mounted on the wheel shaft 21 of the moving distance measuring device 20. The rotary encoder 23 includes a light emitting diode 24 for projecting light to a light source, a pair of photoelectric elements 25 for detecting light projected from the light emitting diodes 24, a light emitting diode 24, and a photoelectric element. The moving distance of the frame 10 is fixed to the wheel shaft 21 so as to be disposed between the rotary disk 26 and the wheel shaft 21 rotated together with the pulse signal input from the photoelectric element 25. Is composed of a moving distance indicator 27 for calculating and displaying. In the rotating disk 26, a plurality of slits 26a are formed at equal intervals along the circumferential direction so that light projected from the light emitting diodes 24 passes, and the photoelectric element 25 and the movement distance indicator 27 are signals It is connected by a cable 28. In this embodiment, a condenser lens may be disposed between the light emitting diode 24 and the rotating disk 26, or a fixed slit plate may be disposed between the photoelectric element 25 and the rotating disk 26. . As shown in FIG. 1, the light emitting diode 24, the photoelectric element 25 and the rotating disk 26 of the rotary encoder 23 are incorporated in the casing 29.

1 to 4, the first striking device 30 that strikes the tunnel concrete lining 1 in the first installation hole 11a and the second installation hole 11b of the frame 10 to generate an elastic wave 30. ) And the second striking device 40 are respectively provided. Each of the first and second striking devices 30 and 40 has a solenoid 32 and 42 having operating rods 31 and 41 and tunnel concrete at the tip of the operating rods 31 and 41 of the solenoid 32 and 42. It consists of striking bodies 33 and 43 which are fixedly attached by fixing means, for example, adhesives 33a and 43a, so as to strike the surface of the lining 1. In the present embodiment, the striking bodies 33 and 43 are made of metal balls so as to generate high frequency acoustic waves. The lower surfaces of the solenoids 32 and 42 are attached with dustproof members 34 and 44 which block vibration and shock caused by contact with the striking bodies 33 and 43. The solenoids 32 and 42 of the first and second striking devices 30 and 40 are electrically connected to the control unit 50 by means of wires 35 and 45 as control means, and the control unit 50 is provided with an acoustic wave. The voltage regulator 51 and the power switch 52 for controlling the power supplied to the solenoids 32 and 42 are configured to control the size of the. As shown in FIG. 2, the control unit 50 applies power required for the operation of the light emitting diode 24 and the photoelectric element 25 of the rotary encoder 23 through the wire 53.

3 and 4, the safety diagnosis system of the present invention to detect the acoustic waves generated from the tunnel concrete lining 1 by the strike of the first striking device 30 and the second striking device 40. First and second sensing sensors 60 and 61 provided in the third and fourth installation spaces 11c and 11d of the frame 10, respectively. A first pressing device 70 and a second pressing device 80 for contacting the surfaces of the tunnel concrete lining 1 with a predetermined force are provided, respectively. In the present embodiment, the first and second sensing sensors 60 and 61 use an accelerometer that can grasp the physical properties of the tunnel concrete lining 1.

In addition, each of the first and second pressurizers 70 and 80 supplies air cylinders 72 and 82 having cylinder rods 71 and 81 and compressed air for operation of the air cylinders 72 and 82. It consists of the air supply unit 90. The air supply unit 90 includes a tank 91 filled with compressed air, an air conditioner controller 92 for supplying compressed air from the tank 91 to the air cylinders 72 and 82 at a prescribed pressure, and a tank. (91), air cylinders (72, 82) and an air line (93) connecting the air conditioner controller (92).

The tank 91 of the air supply unit 90 is equipped with a pressure gauge 91a for measuring the pressure of the compressed air. The compressed air of the tank 91 can be charged by a well-known compressed air charger such as a manual pump or an air compressor, and the tank 91 is made compact so that it can be transported together with the air conditioner controller 92. On the upper surface of the air conditioner controller 92, a direction control valve 92a for controlling the flow of compressed air supplied to the air cylinders 72 and 82 of the first and second pressurizing devices 70 and 80, and the first and The first button 92b and the second button 92c for controlling the operation of each of the air cylinders 72, 82 of the second pressurizing device 70, 80 are mounted. The first hose 93a of the air line 93 supplies compressed air from the tank 91 to the air conditioner 92 or recovers compressed air from the air conditioner 92 to the tank 91. The second hose 93b of the air line 93 is connected to the direction control valve 92a of the air conditioning controller 92, and is connected to the third hose 93c and the fourth hose branched from the second hose 93b. 93d) is connected to each of the air cylinders 72, 82 of the first and second pressurizers 70, 80. In addition, the control unit 50 and the air conditioner controller 92 are connected by an electric wire 94, and the air supply controller 95 is connected to a power supply line 95 for applying power from the outside.

3 to 5, the solenoids 32 and 42 of the first and second striking devices 30 and 40 mounted in the first to fourth mounting holes 11a to 11d of the frame 10 and The air cylinders 72 and 82 of the first and second pressurizers 70 and 80 are supported by the cooperation of the plurality of dustproof members 100 and the screws 101. The tip of the screw 101 which is fastened through the screw hole 12 of the frame 10 is firmly fixed by supporting the dustproof member 100. The dustproof member 100 is interposed in the first to fourth mounting holes 11a to 11d at a predetermined distance 102 from the inner surfaces of the first to fourth mounting holes 11a to 11d. As shown in FIG. 5, the first and second pressurizers 70 and 80 are disposed between the dustproof members 100 interposed between the third and fourth installation holes 11c and 11d of the frame 10. The reinforcement plate 103 is interposed so as to increase the holding force of the air cylinders 72 and 82. The reinforcing plate 103 is composed of a metal plate, and the first and second striking devices 30 and 40 between the dustproof members 100 interposed between the first and second installation holes 11a and 11b of the frame 10. It may be interposed so as to increase the fixing force of the solenoids (32, 42).

Referring again to FIGS. 1 and 2, the distance L1 between the impact point of the first striking device 30, ie, the epicenter and the sensing point of the first sensing sensor 60, is the striking point of the first striking device 30. The distance L2 between the point and the sensing point of the second sensing sensor 61 is arranged to remain the same. As such, when the distances L1 and L2 of the first and second sensing sensors 60 and 61 are kept the same from the impact point of the first striking device 30, the striking force of the first striking device 30 may be reduced. The generated acoustic waves of the tunnel concrete lining 1 are applied to the first and second damping sensors 60 and 61 in the same manner. Therefore, the reliability of the data obtained by the first and second sensing sensors 60 and 61 can be increased. The distances L1 and L2 of the first and second sensing sensors 60 and 61 from the hitting point of the first striking device 30 may be set differently.

Further, the distance L3 between the sensing point of the first sensing sensor 60 and the sensing point of the second sensing sensor 61, the sensing point of the second sensing sensor 61, and the strike of the second striking device 40. The distance L4 between the points is arranged to remain the same. That is, the sensing point of the first sensing sensor 60 is disposed twice as far as the sensing point of the second sensing sensor 61 from the striking point of the second striking device 40. Therefore, also in the case of the second striking device 40, as in the first striking device 30, it is possible to increase the reliability of the data obtained by the first and second sensing sensors (60, 61). The distances L3 and L4 of the first and second sensing sensors 60 and 61 from the hitting point of the second striking device 40 may be set differently.

As shown in FIG. 2, the safety diagnosis system of the present invention includes a data acquisition computer 110 connected by first and second sensing sensors 60 and 61 and signal lines 62 and 63, respectively. In addition, the computer 110 processes data input from the first and second sensing sensors 60 and 61 by a program.

Now, a local concrete safety diagnosis method for tunnel concrete lining using the seismic detection method according to the present invention will be described. Tunnel concrete lining local precision safety diagnosis method of the present invention is a non-destructive experiment using Modified Impact Echo (ModIE) and Spectral Analysis of Surface Waves (SASW) applied the impact echo technique, In the specification, it is called MiSA (Method of Integrated Spectral Analysis).

2 and 7 together, the operator grasps the handle 14 of the frame 10, the wheel 13 of the frame 10 and the moving distance measuring device on the surface of the tunnel concrete lining 1 of the first exploration point After contacting the wheels 22 of 20, the direction control valve 92a of the air conditioner controller 92 is operated to tank the air cylinders 72 and 82 of the first and second pressurizers 70 and 80. Compressed air is supplied from 91. The cylinder rods 71 and 81 are advanced by the operation of the air cylinders 72 and 82, and the first and second sensing sensors 60 and 61 are in contact with the surface of the tunnel concrete lining 1 (S200). Thus, the movement of the frame 10 is stopped, and preparation for exploration of the tunnel concrete lining 1 is completed.

Subsequently, when the power switch 52 of the control unit 50 is turned on and the first button 92b is operated, the solenoid of the first striking device 30 is controlled through the voltage regulator 51 of the control unit 50. Power is supplied to (32). The operation rod 31 is advanced by the operation of the solenoid 32, and the striking body 33 strikes the surface of the tunnel concrete lining 1 (S201). The impact energy is applied to the tunnel concrete lining 1 by the impact of the striking body 33 to generate an elastic wave, and the elastic wave is detected by the first and second damping sensors 60 and 61 (S202). The computer 110 processes data input from the first and second sensing sensors 60 and 61 by a program (S202). As described above, the seismic waves of the tunnel concrete lining 1 generated by the striking of the first striking device 30 are sensed by the first and second sensing sensors 60 and 61 at both sides of the first striking device 30. It is the crystal impact echo technique. In the crystal shock echo method of the present invention, the first and second damping sensors 60 and 61 detect the elastic waves of the tunnel concrete lining 1 by the first striking device 30, thereby reducing the first and second damping. The reliability of the data of the sensors 60 and 61 can be greatly increased.

Next, after the exploration of the tunnel concrete lining 1 by the crystal impact echo method is completed by the cooperation of the first striking device 30 and the first and second sensing sensors 60 and 61, the second button 92c. ), Power is supplied to the solenoid 42 of the second striking device 40. The solenoid 42 and the striking body 43 of the second striking device 40 generates an elastic wave by applying impact energy to the tunnel concrete lining 1 in the same operation as the first striking device 30 (S204), This acoustic wave is detected by the first and second damping sensors 60 and 61 (S205). The computer 110 processes data input from the first and second sensing sensors 60 and 61 by a program (S206). In this way, the first and second damping sensors 60 and 61 are separated from the second striking device 40 in one direction by the elastic waves of the tunnel concrete lining 1 generated by the striking of the second striking device 40. Exploration is surface destruction. The mass method of the present invention uses the resonant frequency identified by calculating the elastic wave speed and checking the resonant frequency in accordance with the data of the surface digging method in order to measure the thickness of the tunnel concrete lining (1) by the data of the crystal impact echo method.

Subsequently, after the exploration of the tunnel concrete lining 1 by the impact of the second striking device 40 is completed, the direction control valve 92a of the air conditioner controller 92 is operated to operate the first and second pressurizing devices. When the compressed air supplied to the air cylinders 72 and 82 of the 70 and 80 is discharged to the tank 91, the cylinder rods 71 and 81 of the air cylinders 72 and 82 are retracted and the first and the first 2 to reduce the sensor (60, 61) (S207).

Meanwhile, the striking bodies 33 and 43 of the first and second striking devices 30 and 40 are returned as the operating rods 31 and 41 of the solenoids 32 and 42 are retracted, and the striking body 33 to be returned. , 43 is in contact with the dustproof members 34 and 44. Therefore, the generation of vibration and shock due to the contact between the solenoids 32 and 42 and the striking bodies 33 and 43 is blocked. The solenoids 32 and 42 of the first and second striking devices 30 and 40 and the first and second pressurizing devices 70 and 80 in each of the first to fourth mounting holes 11a to 11d of the frame 10. The anti-vibration member 100, which supports the air cylinders 72 and 82 of the circumference, mitigates the transmission of vibration and shock, and the gap 102 minimizes the contact area between the frame 10 and the anti-vibration member 100. Therefore, it is possible to increase the accuracy of the operation of the solenoids 32 and 42 and the air cylinders 72 and 82, as well as the interference of noise with the data obtained by the first and second sensing sensors 60 and 61. This can be eliminated to greatly increase the reliability of the data.

Next, when the exploration of the exploration point of the first tunnel concrete lining 1 is completed, the worker grabs the handle 14 of the frame 10 and the tunnel concrete lining 1 to the exploration point of the second tunnel concrete lining 1. The frame 10 is moved by the cooperation of the wheel 13 of the frame 10 and the wheel 22 of the moving distance measuring device 20 along the surface of the frame 10. At this time, the wheel 10 of the frame 10 may steer the frame 10.

The rotating disk 26 of the rotary encoder 23 fixed to the wheel shaft 21 together with the wheel 22 of the moving distance measuring device 20 is rotated. The light projected from the light emitting diodes 24 of the rotary encoder 23 passes through or is reflected by the slit 26a of the rotating disk 26 which is being rotated, and is detected by the photoelectric element 25 at regular intervals. The pulse signal corresponding to the rotation angle of (26) can be obtained. The movement distance indicator 27 calculates and displays the movement distance of the frame 10 according to the pulse signal of the photoelectric element 25. Therefore, the moving distance of the frame 10 from the first detection point to the second detection point can be accurately measured (S208), and the operator can accurately check the moving distance of the frame 10 (S209). After the frame 10 is moved to the second exploration point, the tunnel concrete lining 1 is examined by the crystal impact echo method and the surface breaking method similarly to the exploration operation of the first tunnel concrete lining 1. By repeating the second exploration operation, the exploration of the tunnel concrete lining 1 of the entire tunnel can be performed.

The embodiments described above are merely to describe preferred embodiments of the present invention, the scope of the present invention is not limited to the described embodiments, those skilled in the art within the spirit and claims of the present invention It will be understood that various changes, modifications, or substitutions may be made thereto, and such embodiments are to be understood as being within the scope of the present invention.

As described above, according to the local precision safety diagnosis system and tunnel concrete lining using the seismic detection method according to the present invention, the seismic waves of the tunnel concrete lining generated by the strike of the first striking device is provided on both sides of the first striking device. The first shock absorber, which is one-way away from the second striking device, is a modified shock echo technique that senses the first sensing sensor and the second sensing sensor and processes the data in the tunnel concrete lining caused by the striking of the second striking device. By using the surface digging method detected and processed by the sensor, it is possible to accurately and efficiently carry out local safety diagnosis of the tunnel concrete lining. In addition, the local precision safety diagnosis of the tunnel concrete lining can be quickly performed while freely moving the first and second striking devices and the first and second sensing sensors on the frame. Can improve the reliability.

Claims (9)

A frame capable of moving along the surface of the tunnel concrete lining; Moving distance measuring means mounted to the frame to measure the moving distance of the frame; First and second striking means installed on the frame so as to strike the surface of the tunnel concrete lining to generate elastic waves; A first damping sensor and a second damping sensor provided in the frame so as to sense an elastic wave generated by the strike of the first striking means and the second striking means; First pressing means and second pressing means installed on the frame such that the first sensing sensor and the second sensing sensor are in contact with the surface of the tunnel concrete lining; Tunnel concrete lining local precision safety diagnosis system using the seismic detection method comprising the first striking means and the second striking means and the control means for controlling the first pressing means and the second pressing means. According to claim 1, The moving distance measuring means, Wheels provided on the frame for rolling along the surface of the tunnel concrete lining; Tunnel concrete lining local precision safety diagnosis system using the seismic detection method consisting of a rotary encoder for sensing the angular velocity of the wheel. The method of claim 1, wherein each of the first sensing sensor and the second sensing sensor is arranged on both sides of the first striking means, the measuring point of the first sensing sensor and the second sensing sensor is Localized precision safety diagnosis system for tunnel concrete lining using seismic detection method, characterized in that it is maintained at the same distance as the hitting point. The method of claim 1, wherein the first sensing sensor and the second sensing sensor are arranged in one side of the second striking means, the distance between the measuring point of the first sensing sensor and the measuring point of the second sensing sensor And the distance between the measuring point of the first sensing sensor and the hitting point of the second striking means are kept the same. The method of claim 1 or 3 or 4, wherein each of the first striking means and the second striking means, A solenoid mounted through the frame and having a working rod; Tunnel concrete lining local precision safety diagnosis system using the seismic detection method consisting of a striking body fixedly attached to the operating rod of the solenoid. The method of claim 1, wherein each of the first pressing means and the second pressing means is provided through the frame, and the first sensing sensor and the second sensing sensor are fixedly fixed. Localized precision safety diagnosis system for tunnel concrete lining using seismic detection technique consisting of air cylinders with attached cylinder rods. The localized precision safety diagnosis system for tunnel concrete lining using the seismic detection method of claim 1, wherein each of the first striking means and the second striking means, the first pressurizing means and the second pressurizing means is installed with an anti-vibration member interposed therebetween. Contacting an exploration point of the tunnel concrete lining with a first sensing sensor and a second sensing sensor provided in a frame capable of moving along the surface of the tunnel concrete lining; A first seismic wave generating step of generating an elastic wave by striking an exploration point of the tunnel concrete lining by a first striking means positioned between the first sensing sensor and the second sensing sensor; A first seismic wave detecting step of detecting the seismic wave by the first sensing sensor and the second sensing sensor; A first data processing step of processing data of the first sensing sensor and the second sensing sensor; Generating a seismic wave by striking the exploration point of the tunnel concrete lining by a second striking means arranged in one direction of the first sensing sensor and the second sensing sensor; A second acoustic wave sensing step of sensing the acoustic wave by the first sensing sensor and the second sensing sensor; Tunnel concrete lining local precision safety diagnosis method using the seismic detection method comprising a second data processing step of processing data of the first and second sensing sensors. 9. The method of claim 8, further comprising measuring a moving distance of the frame moved from an exploration point of the tunnel concrete lining.