铁道标准设计2016，Vol.60Issue(8)：108-112,5.
高地应力软岩隧道围岩压力及二衬受力特征研究
Study on Surrounding Rock Pressure and Mechanical Characteristics of Secondary Lining in Weak Rock Tunnel with High Geo-stress
摘要
Abstract
In order to study the soft rock pressure and mechanical characteristics of secondary lining in weak rock tunnel with high geo-stress, the Daliang tunnel on the second double-track line of new Lanzhou~Xinjiang railway is based to monitor the contacting pressure on surrounding rock and the initial lining and the contacting pressure between the initial lining and the secondary lining, and the development law over time and the spatial distribution of contacting pressure are obtained. The internal force of the secondary lining structure is calculated based on measured surrounding rock pressure. The study results show that the two kinds of pressures change differently over time;the contacting pressure is larger on both sides, smaller in vault, which indicates an obvious lateral extrusion;the secondary lining bears the average of 45. 0% ~70. 3% of the surrounding rock pressure; the measured surrounding rock pressure is more practical than the internal force of the secondary lining calculated based on specified surrounding rock pressure.关键词
铁路隧道/高地应力/围岩压力/现场监测/受力特征Key words
Railway tunnel/High geo-stress/Surrounding rock pressure/In-situ monitoring/Mechanical characteristics分类
交通运输引用本文复制引用
田鹏..高地应力软岩隧道围岩压力及二衬受力特征研究[J].铁道标准设计,2016,60(8):108-112,5.基金项目
铁道部科技研究开发计划项目(2009G020-B-1) （2009G020-B-1）
