衬砌背后不压浆只塡干砌片石以利排水的措施,在稳固岩层中个别集中漏水地段可以采用。但为了保証衬砌与地层起共同作用,干砌地段不宜过长。铁路隧道渗水与漏水,对运营的危害性很大若在修建过程中,不予彻底解决就給以后的使用带来无法克服的困难,隧道漏水的主要危害是: 第一、养护維修困难。第二、增加了机车牵引阻力。第三、无法安全地使用电力牵引。第四、在寒冷地区漏水結成冰柱或冰锥,危及行車安全。第五、由于水的冲刷或循环冻胀的影响,衬砌结构易被损坏。因此,隧道渗水与漏水,是急待解决的重要问题之一。过去修建 Lining behind the non-pressure grouting only dry stone to facilitate the drainage measures, in the stability of the individual concentrated water leakage can be used. However, in order to ensure the lining and strata play a common role, dry-laid lots should not be too long. Seepage and leakage of railway tunnels are very harmful to the operation. If not completely solved during the construction process, this will bring insurmountable difficulties for future use. The main hazards of tunnel leakage are as follows: First, maintenance and repair are difficult. Second, an increase of locomotive traction resistance. Third, the use of electric traction can not be safely used. Fourthly, leakage of water into ice columns or ice cones in cold areas jeopardizes traffic safety. Fifth, the lining structure is easily damaged due to the impact of water erosion or cyclic frost heaving. Therefore, tunnel seepage and water leakage is one of the important issues to be solved urgently. Built in the past