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考虑厦门海底隧道F4风化囊区段岩体的流变作用,采用有限元软件ANSYS对围岩-支护系统相互作用的时效特征作了数值分析。分析中主要计及支护时间和支护厚度这两个因素,分别得到不同支护时间和不同支护厚度下围岩与衬砌的应力、变形及其时间效应。为厦门海底隧道合理选择支护厚度和支护设置时间提供参考。
Considering the rheological function of the rock mass in the section of F4 weathering capsule in Xiamen Subsea Tunnel, the finite element software ANSYS was used to analyze the aging characteristics of the surrounding rock-support system interaction. In the analysis, the main factors of supporting time and supporting thickness are taken into account, and the stress, deformation and time-effect of surrounding rock and lining with different supporting time and different supporting thickness are obtained respectively. It provides a reference for choosing reasonable support thickness and supporting setting time for Xiamen subsea tunnel.