Analysis of Surrounding Rock Deformation Law Based on PLAXIS 3D
In order to study the image of surrounding rock deformation caused by different construction parameters during tunnel con-struction,a finite element model was established based on the engineering background of Liupu Tunnel,and the influence laws of differ-ent support strength and excavation footage on surrounding rock deformation during tunnel construction were analyzed.The results show that during tunnel excavation,the arch settlement and surrounding convergence of surrounding rock are negatively correlated with the support strength of tunnel,but positively correlated with the tunneling footage.At the same time,a polynomial fitting is carried out on the settlement of the tunnel vault and the maximum convergence of the surrounding rock.According to the fitting curve,within the study range,with the increase of the lining strength,the influence strength on the settlement of the tunnel vault and the maximum convergence of the surrounding convergence gradually increases,and with the increase of the excavation progress,the influence strength on the maxi-mum settlement of the tunnel vault gradually increases.
surrounding rock deformationnumerical simulationtunnel safety
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