Based on the elastic theory, an analysis can be made on stress and plastic deformation under tunnel excavation and shotcrete support.FLAC 3D can be used to simulate the mechanical behavior of excavation and support, getting the deformation of surrounding rock stress and plastic without support and shotcrete. The results show that, the prestress applied on the anchor equals to the supporting force when the tunnel plastic zone disappears. This support improves the self bearing capacity of surrounding rock, effectively suppresses the expansion of the plastic zone after the tunnel excavation, and prevents further damage to the tunnel surrounding rock.
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张虎元,孙逊,秦佳.隧洞支护效应的探讨[J].土木与环境工程学报(中英文),2013,35(Z2):121-123. Zhang Fuyuan, Sun Xun, Qin Jia. Study of Tunnel Supporting Effect[J]. JOURNAL OF CIVIL AND ENVIRONMENTAL ENGINEERING,2013,35(Z2):121-123.[doi]