On the Geomechnical Model Test of Testing Technology of the Fault Fracture of Surrounding Rock

Along with the fast development of transportation infrastructure construction in our country, the highway tunnel construction is increasing and tunnel construction has become an important part of the current construction. Because the tunnel has a wide span and the construction procedures are tedious, the changes of the stress of surrounding rock and supporting relationship are complex, problems easily tend to occur. With the Great Wall Mountain Tunnel as the engineering background, this artical carries out the research on characteristics of deformation and fracture of the overlying rock on the tunnel and the geomechnical model test of testing technology of the fault fracture of surrounding rock. Through comparative tests, the graphite type wire is finally chosen. This material can basically synchronize with the fault fissure of model medium, meet the test requirements and have great significance in engineering application.