The Automatic and Real Time Measurement of Tunnel Surrounding Rock Deformation

Abstract

We designed a tunnel surrounding rock(TSR) deformation automatic and real time measurement system .The long distance laser datum line instrument (LDLI) is fixed in stable ceiling rock of the tunnel. The LDLI transmits a bunch of lateral linear benchmark beam with small facula, and projects to the linear array CCD which mounted on instable surrounding rock. The linear array CCD detected the facula centre position real time. The facula displacement within a period is equal to the displacement of instable rock. We used the wireless data transmission module and optical fiber transceiver to transfer the displacement data to the on duty room computer. We compiled the data processing software to display the measure result in graphical and give a judge for the instable surrounding rock. If it is in danger, the alarm module gives audible and visible alarm signal in site and send a message to the manager’s mobile phone. The measurement accuracy is less than 1mm. We used this system to measure the tunnel surrounding rock deformation automatically and real time to realize intelligent management in several tunnel