Study on the Influence and Optimization of Support Structure Parameters on Deep Buried Soft Rock Tunnels
In order to control the large deformation of the tunnel and ensure the construction safety,based on the Guixi Tunnel,numerical simulation and nonlinear planning were used to study and opti-mize the support structure parameters that affect the stability of the tunnel,such as shotcrete thick-ness,grouting reinforcement thickness,and anchor length.The results show that increasing the shot-crete thickness,grouting thickness and anchor length can effectively reduce the deformation of the critical point of the surrounding rock and the volume of the plastic zone,but when these parameters are too large,the support effect will be weakened.Therefore,sampling calculation and non-linear programming are used to optimize the cost and performance combination of these three support param-eters,thus obtaining the optimal support parameters as a construction plan with a shotcrete thickness of 24 cm,anchor rod length of 3 m,and grouting reinforcement thickness of 0.5 m.
soft rock tunnelssupport structure effectssupport structure optimizationnumerical simulationnonlinear programming
万方数据
维普
