The slot elements are set up to simulate slot between lining and rock mass and the 3 D elastoplastic FEM is adopted with multi stage load and changible stiffness iteration.

在压力隧洞充水运行时，对衬砌与围岩之间的接缝采用接缝空腔单元模拟。

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In this paper, a 3-d visco-elastoplastic FEM and a 3-d elastoplastic FEM are used to analyze the stability of the excavation structure of one hydropower station diversion tunnel system.

同时对某水电站引水隧道系统进行了三维粘弹塑性有限元数值模拟和三维弹塑性有限元数值模拟。

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