Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Tunnel Construction》 2009-02
Add to Favorite Get Latest Update

Key Technology to Control Serious Deformations of Soft Rock Stratum with High Ground Stress:Case Study on Baozhen Tunnel

WANG Shuishan1,2(1.China Railway Tunnel Group Co.,Ltd.,Luoyang 471009,Henan,China;2.Yichang-Wanzhou Railway Construction Headquarters of Ministry of Railways,Enshi 445000,Hubei,China)  
During the construction of Baozhen tunnel on Yichang-Wanzhou railway,serious deformation of soft rocks with high ground stress,unconformity between excavation-revealed geological conditions and the designed geological conditions and severe support distortions happen.In order to ensure the successful tunneling through this section,countermeasures including installing flexible support before the installation of the rigid support,stress releasing before stress resisting,installing multi-layer supports,improving the rigidness of the secondary lining and adopting super-short benches are taken,which brings the serious deformation of the surrounding rock mass under control.In order to better control the deformation,deformation predicting program is adopted.The comparison between the predicted values and the measured values shows that the software has a good reliability.By means of timely adjusting the support parameters according to the monitoring data,the tunneling successfully passes through the section.
【CateGory Index】: U455.4
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved