Abstract:

The existing information collecting method for tunnel surrounding rock discontinuity can not meet the rapid construction requirements of tunnel. As a result, CAE Sirovision system based on digital photogrammetry is studied; and the basic working principle of the system and the identification method of surrounding rock discontinuity attitude are introduced. In a case study, the total station is adopted for control measuring; Nikon D7000 is used and the model of relationship between images and objects is established based on CAE Sirovision system. The identification and interpretation of digital information of surrounding rock discontinuity can be realized by interactive operation. The rock quality designation (RQD) evaluation system is established. The RQD roseshaped diagram of surrounding rock discontinuity surface is proposed according to spatial difference of rock structure. The results can provide references for digitalized construction of tunnel.

Key words: tunnel surrounding rock, CAE Sirovision, closerange photogrammetry, surrounding rock discontinuity, RQD, roseshaped diagram