冻融条件下软岩隧道冻胀力计算分析  

Analysis of soft rock tunnel expansion mechanics by freezing and thawing

作　　者：张全胜[1] 杨更社[1] 王连花[1] 李宝花[1] 

机构地区：[1]西安科技学院建筑与土木工程学院

出　　处：《西安科技学院学报》2003年第1期1-5,26,共6页

基　　金：国家自然科学基金(10072047);冻土工程国家重点实验室基金(200104);教育部优秀青年教师基金项目部分内容

摘　　要：针对软岩体含水率高、孔隙率大、对温度变化敏感等特点,本文首先在一定假设的基础上,分析了温度影响范围内软岩体冻结后,内部水冰相变会导致隧道衬砌承受冻胀力的原因,推导出了其弹性力学解,其次分析了融化过程及融化后冻胀力变化的过程及原因,运用弹性力学复变函数法推导出了冻融后隧道衬砌所承受冻胀力的表达式,最后给出了算例并指出将来的研究方向。As is known to all that the soft rock is of characteristic of high water content, porosity and the sensitivity to the temperature. Firstly, on the basis of certain suppositions, the freezing stress loading on the underskirt is analyzed, and the formula is deduced during the process of freezing. Secondly, with a view to the variation of elasticity modulus during the thawing process, the stress and it's law of variation are studied primarily. Finally, an example is given and the future aspects is pointed out.

关 键 词：隧道 软岩 冻胀力 

分 类 号：TU452[建筑科学—岩土工程]