铁道标准设计Issue(12)：82-86,5.
兰渝铁路两水隧道软岩大变形控制技术
Control Technology for Large Deformation of Liangshui Tunnel with Soft Rock on Lanzhou-Chongqing Railway
摘要
Abstract
The Liangshui Tunnel on Lanzhou-Chongqin Railway is a single-tube double-track tunnel with the total length of 5945. 35 meters, passing through the stratum of silurian carbonaceous phyllite, accompanied by high ground stresses. In the process of construction for it, the large deformation once occurred, and the initial supporting had to be replaced over and over again due to intruding into the clearance limitation. So the safety risk of the project was relatively high and it was difficult to construct this project. In this thesis, the characteristics of the soft rock tunnel with high ground stress as well as the features of large deformation were researched, and then the bench length of three-bench seven-step excavation method which has influence on the deformation was analyzed contrastively. The results of contrastive analysis showed that the micro bench method was more conductive to control the deformation. Simultaneously, a series of auxiliary technical measures were also adopted for controlling the deformation,and eventually the large deformation of the tunnel was controlled effectively. This case can serve as a helpful reference for the construction of soft rock tunnel with high ground stress.关键词
铁路隧道/高地应力/软岩隧道/大变形/控制技术Key words
railway tunnel/high ground stress/soft rock tunnel/large deformation/control technology分类
交通工程引用本文复制引用
吴广明,刘志春,吴晓辉..兰渝铁路两水隧道软岩大变形控制技术[J].铁道标准设计,2013,(12):82-86,5.基金项目
铁道部科技研究开发计划项目(2009G009-B-3) （2009G009-B-3）
