某湖底隧道主体结构的裂缝分析

摘要

基于非线性有限元分析,对某湖底隧道主体结构关键区段在土水压力、不均匀沉降、温差等因素作用下的裂缝分布规律进行了研究,指出各区段在土水压力作用下均为带裂缝工作,裂缝分布在顶板跨中底面、外侧墙顶部外侧以及顶板正中顶面等位置,较小的不均匀沉降对各区段的裂缝分布影响不大,温度应力对裂缝分布的影响较大,降温会导致底板出现新的微裂缝.其结果可供类似隧道的设计、施工和管养参考.%Based on nonlinear finite element analysis, the key sections of the main structure of a tunnel under lake were studied under the action of such factors as soil and water pressure, differential settlement, and temperature. Distribution of the cracks was studied. The weak link in the tunnel leakage risks was pointed out. The results can be reference to the design, construction and maintenance of similar tunnels.