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本文研究的问题与深埋衬砌隧道的设计有关,根据隧道的有限元数值计算结果,采用一种精确而又简单的新隐式法(以下简称NIM法)来研究隧道开挖面推进的三维问题,这种方法有助于正确评估每个参数对隧道稳定性的影响。NIM法在原理上和收敛-约束法(CV—CF法)相同,但在计算刚设置衬砌的隧道收敛值U_0时,本法考虑了衬砌刚度。本文的第二部分对位于巴黎东部深层泥灰岩中的隧道开挖进行了模拟分析。
The problem studied in this paper is related to the design of deep lining tunnel. According to the finite element numerical calculation results of the tunnel, a precise and simple new implicit method (NIM method) is used to study the three-dimensional problem of tunneling surface propulsion , This approach helps to properly assess the impact of each parameter on tunnel stability. The NIM method is the same in principle as the Convergence-Constraint Method (CV-CF method), but the stiffness of the lining is taken into account when calculating the tunnel convergence value U_0 just for the lining. The second part of this paper simulates the tunnel excavation in the deep marl in eastern Paris.