矿山法地铁隧道结构耐久性分析及二次衬砌结构计算

通过对地铁矿山法隧道结构耐久性分析，提出不同于以往二次衬砌结构计算的新方法，即是建立在隧道初期支护与二次衬砌结构共同受力的基础上，并考虑初期支护本身耐久性等因素，释放隧道初支端弯矩进行二次衬砌结构计算的一种计算方法。该方法简单方便，且更符合矿山法隧道二次衬砌结构的计算模型。

Discussion on Structural Durability and Secondary Lining Structural Calculation of Metro Tunnels Constructed by Mining Method

A new calculation method, which is different from the traditional structural calculation method for the secondary lining of the Metro tunnels constructed by the mining method, is proposed on basis of the analysis on the structural durability of the Metro tunnels constructed by the mining method. The proposed calculation method is based on the assumption that the primary reinforcement and the secondary lining bear the loads together and on the fact that such factors as the durability of the primary reinforcement are taken into account. According to the proposed calculation method, the structural calculation of the secondary lining is executed on basis of releasing the bending moment on the end of the primary reinforcement. The proposed calculation method is simple and convenient and can coincide well with the calculation model for the secondary lining of the tunnels constructed by the mining method.