寒区隧道冻胀力的粘弹性解析解  

Analytical Viscoelastic Solution for Frost Force of Cold Regional Tunnels

作　　者：赖远明[1,2] 吴紫汪[1] 朱元林[1] 令锋[1] 朱林楠[1] 

机构地区：[1]中国科学院兰州冰川冻土研究所冻土工程国家重点实验室 [2]兰州铁道学院土木工程系,甘肃兰州730070

出　　处：《铁道学报》1999年第6期70-74,共5页Journal of the China Railway Society

基　　金：国家自然科学基金;中国科学院"九.五"重点资助项目

摘　　要：利用弹性粘弹性相应原理，导出了衬砌－正冻围岩－未冻围岩系统冻胀力在拉氏象空间中的有关算式，然后采用数值逆变换的方法，求得了寒区隧道的冻胀力和衬砌应力。In this paper, the formulae of Laplace transform with respect to time for frost forces of the liner frozen surrounding rock unfrozen surrounding rock system are derived from the elastic viscoelastic correspondence principle. And then, the frost forces and liner stresses of cold regional tunnel are obtained by the numerical inversion of the Laplace transform. Finally, an example is given. This example indicates that the liner stress including the frost factor is much larger than that not including the frost factor.

关 键 词：寒冷地区 隧道 围岩 冻胀力 粘弹性解 冻害 

分 类 号：U451.2[建筑科学—桥梁与隧道工程] U457.5[交通运输工程—道路与铁道工程]