Acoustic emission monitoring performing system suitable for TBM tunnel
A technology of acoustic emission and acoustic emission sensor, which is applied in the direction of material analysis using acoustic wave emission technology, material analysis using sound wave/ultrasonic wave/infrasonic wave, and measuring equipment, which can solve the difficult problem of retrieving the sensor and the difficulty in coupling the sensor to the wall of the borehole , Acoustic emission monitoring is difficult to implement and other problems, to achieve a good ability to locate microseismic crack sources, improve the level of intelligence, and achieve the effect of transmission and reception
Active Publication Date: 2016-05-11
WUHAN UNIV
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[0006] The purpose of the present invention is to provide an acoustic emission monitoring implementation system suitable for TBM tunnels, which can solve the problems of difficult implementation of acoustic emission monitoring on the face of TBM tunnels, difficult coupling between sensors and borehole walls, and difficult recovery of sensors after testing according to local conditions. , so that the micro-fracture acoustic emission information in the process of TBM excavating the face rock mass can be effectively obtained, laying the foundation for improving the level of TBM excavation information intelligence and establishing a rock mass disaster early warning system
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[0037] Such as Figure 5 As shown, an acoustic emission monitoring device for a TBM tunnel acoustic emission monitoring system is characterized in that: it includes a PPR hollow tube 10 that doubles as a push rod and a coupling agent injection channel, and is used to connect two sections of PPR hollow tubes 10 and serve as The tee 12 of the coupling agent overflow channel, the pearl cotton anti-leakage plug I6 and the pearl cotton anti-leakage plug II16 set on the PPR hollow tube 10 for forming the coupling area 15, the straight-through 18 for connecting the PPR hollow tube 10, preventing coupling The bottom end cap 19 and the orifice end cap 20 where the agent flows out. The diameter of the stopper is slightly larger than the diameter of the monitoring borehole 5, and each stopper is provided with a stopper positioning sleeve 7 to prevent it from sliding relative to the PPR hollow pipe 10. The stopper positioning sleeve 7 passes through the bolt 8 is fixed through the bolt h...
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The invention discloses an acoustic emission monitoring performing system suitable for a TBM tunnel. Firstly, five inclined monitoring holes are drilled in the inner rock wall of the TBM tunnel at equal intervals within the 100-degree arch crown range with a vertical line as the center; an acoustic emission monitoring device comprising PPR hollow pipes, a tee joint, leak stopping plugs arranged on the two adjacent PPR hollow pipes in a sleeving mode and an acoustic emission sensor is manufactured; two acoustic emission monitoring devices are arranged in each drilled hole in a connection mode through straight-through joints, and coupling zones formed by the acoustic emission monitoring devices and the hole walls are filled with a coupling agent; when a TBM is started, an acoustic emission instrument connected with the acoustic emission sensors through data lines is switched on to collect data, and after collecting, the straight-through joints for connecting the PPR hollow pipes are screwed off to be recycled. The system can solve the problems that acoustic emission monitoring of face rock of a TBM tunnel is difficult to perform, coupling between sensors and the walls of drilled holes is difficult, and the sensors are difficult to recycle after testing.
Description
technical field [0001] The invention belongs to the technical field of acoustic emission monitoring, and more particularly relates to an acoustic emission monitoring implementation system suitable for TBM tunnels, which can be used for acoustic emission monitoring of tunnel faces when TBMs excavate rocky tunnels such as water conservancy and hydropower and traffic construction. Background technique [0002] Compared with the traditional drilling and blasting excavation method, the TBM (full-face tunnel boring machine) tunnel excavation method has the characteristics of high construction efficiency, good tunnel formation effect, small disturbance to surrounding rock, and excellent safety, and has been more and more widely used. Water conservancy and hydropower, transportation construction and other fields. With the gradual deepening of infrastructure construction, the tunnel project will inevitably encounter the geological environment of high ground stress and large buried de...
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IPC IPC(8): G01N29/14G01N29/28
CPCG01N29/14G01N29/28
Inventor 刘泉声刘琪张晓平刘学伟刘建平赵怡凡
Owner WUHAN UNIV