Analysis On The Laws Of Deep Tunnel’s Asymmetric Deformation And Control Technology Of Surrounding Rock’s Rheological And Disturbed Deformation

The mechanism of asymmetric deformation of deep tunnel which excavated in inclined strata has been analysed. The results showed that the surrounding rock’s layered structure and lithology difference between strata layers are main reasons that caused the asymmetric deformation. The surrounding rock’s structural asymmetry in tunnel’s section caused its deformation aymmetry. The reinforced supporting technology at key deformed parts was proposed. Another main point of this paper is putting rock rheology and distrubace effect theory used into engineering practice successfully. The mechanism of surrounding rock’s destroy and action mechanism of supporting were analysed. The evolution law of stress field was also studied. The rock sample’s long-term strength and neighbourhood of ultimate strength were tested, and then deduced the necessary supporting strength to keep surrounding rock’s long-stability. A multiple supporting technology was proposed which take the concrete-filled steel tubular stent as principal. The carrying capacity of concrete-filled steel tubular short columns was tested, it tested how the steel piple’s different diameter and wall thickness collocated different strength grade of concrete to influence its’ carrying capacity. The result showed that the concrete-filled steel tubular stent can provided IMPa supporting strength and can meet deep tunnel’s controlling demand. At last, a supporting plan about deep tunnel’s long-term stability controlling was designed.