水利水电技术（中英文）

针对隧道衬砌外水压力折减系数选取、衬砌结构选型等问题,在阐述外水压力折减系数含义的基础上,通过对衬砌类型进行系统分类,对不同衬砌型式外水作用规律与外水压力折减系数进行了分析与讨论。其中,全封堵型衬砌折减系数为1,全排型衬砌折减系数为0,而排堵结合型衬砌折减系数则与整个衬砌系统的设计参数有关。同时,指出相应衬砌结构设计中存在的错误认识,并由此引申出隧道工程在外水压力应对处理方面应该关注的主要影响因素。研究成果可为应对外水压力问题的地下隧道衬砌设计提供参考。

Aiming at the selection of the reduction coefficient of the external water pressure for tunnel lining,type-selection of lining structure,etc.,the impacting laws of the external water and the reduction coefficients of the external water pressure on different lining types are analyzed and discussed herein through systematically classifying the types of lining on the basis of the description made on the meaning of the reduction coefficient of the external water pressure,in which the reduction coefficient is 1for the fully sealed lining and 0 for the fully draining lining,while the reduction coefficient of the sealing and draining combined lining is related to the design parameters of the whole lining system. Meanwhile,some misconceptions in the relevant lining structure design are pointed out,from which the main impacting factors to be paid attention to in the aspect of dealing with the external water pressure in tunneling project are derived out as well. The study can provide a reference for the design of the lining for underground tunnel in the aspect of dealing with the problem from the external water pressure.