2021•IOP Conference Series Earth and Environmental ScienceOpen access

Research on Deformation Control Measures of Surrounding Rock in Soft Rock Tunnel

Junsuo Hao

Abstract

Abstract In order to study the control measures of soft rock tunnel surrounding rock deformation, based on the restraint effect of shotcrete anchor support on it, a support model was constructed, and numerical simulation was used to compare and analyze the restraint effects of different bolts controlling the surrounding rock deformation. The results show that: With the reduction of the bolt spacing (d), the resin bolt has a significant supporting effect compared with the mortar bolt support, the maximum displacement of the surrounding rock is reduced by 70.69%, and the maximum stress is reduced by 58.81%. With the increase of bolt length (L), compared with mortar bolt support, resin bolt has a more obvious restraint on surrounding rock deformation. The maximum displacement of surrounding rock is reduced by 57.89% and the maximum stress is reduced by 40.23%. When 4.5m

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Key concepts: Rock bolt, Shotcrete, Mortar, Deformation (meteorology), Geotechnical engineering, Displacement (psychology), Geology, Stress (linguistics)