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| Technology for Control of Deformation of High Stress Soft Rock Tunnel with Release － constraint Balancing Method |
| ZHANG Min － qing1,HUANG Hong － jian1,HE Zhi － jun1,REN Cheng － min1 ,ZHANG Wen － qiang2 |
| 1． Engineering Management Centre，Ministry of Railways，Beijing 100844，China; 2． China Railway Tunnel Group Co． Ltd，Luoyang，Henan 471009，China |
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Abstract Research purposes: It is difficult to control the large deformation of the high stress soft rock tunnel in the tunnel construction． The Lanzhou － Chongqing Railway has 29 high stress soft rock tunnels，and in spite of using a lot of technologies to control the deformation，but the large deformations still happened to the primary supports in the 4 kilometers long area and the rigid frames had to be replaced． The big deformations produced the big impact on the construction． So． It was necessary and important to do the research on the technology for control of the deformation of the high stress soft rock tunnel in order to guarantee the engineering quality，speed up the construction process and guarantee the construction security．
Research conclusions: ( 1 ) To evaluate the danger of the large deformation is the important to prevent the large deformation of the high stress soft rock tunnel，and the evaluation content should include the three areas of the grading of the high stress soft rock tunnel，the deformation calculation and formulation of the responsibility for the failure of the primary support． ( 2 ) The release － constraint balancing method is used for releasing the ground stress by allowing deformation volume according to the features of the high stress soft rock tunnel and constraining the deformation by strengthening the primary support and lock pin，closing timely and dynamically reinforcing． The engineering application in the Lanzhou － Chongqing Railway shows this method is available for controlling the big deformation of the high stress soft rock tunnel．
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Received: 27 April 2012
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［1］ 张祉道． 关于挤压性围岩隧道大变形的探讨和研究［J］．现代隧道技术，2003( 2) : 6 －12．
Zhang Zhidao． Discussion and Study on Large Deformation of Tunnel in Squeezing Ground ［J］． Modern Tunnelling Technology，2003( 2) : 6 － 12．
［2］ 铁道第二勘察设计院． 铁路隧道设计规范［M］． 北京: 中国铁道出版社，2005．
Railway Secord Survey and Design Group． Cord for Design of Railway Tunnel［M］． Beijing: China Railway Press，2005．
［3］ 张向东，张树光，贾宝新． 隧道力学［M］． 徐州: 中国矿业大学出版社，2010．
Zhang Xiangdong，Zhang Shuguang，Jia Baoxin． Tunnel Mechanics ［M］． XuZhou: China Mining University Press，2010．
［4］ 王梦恕． 中国隧道及地下工程修建技术［M］． 北京: 人民交通出版社，2010．
Wang Mengshu． Construction Technology of the Tunnel and Ground Engineering in China［M］． Beijing: China Communicatoions Press，2010．
［5］ 关宝树． 软弱围岩隧道施工技术［M］． 北京: 人民交通出版社，2011．
Guan Baoshu． Construction Technology of the Soft Rock Tunnel ［M］． Beijing: China Communicatoions Press，2011．
［6］ 孙元春，高波，许再良，等． 隧道围岩挤压变形预测方法研究［J］． 铁道工程学报，2012( 2) : 50 －54．
Sun Yuanchun，Gao Bo，Xu Zailiang，etc． Research on Prediction Method for Squeezing Deformation of Surrounding Rock of Tunnel［J］． Journal of Railway Engineering Society，2012( 2) : 50 － 54．
［7］ 杜世回． 秦岭岭翠华山特长隧道高地应力问题研究［J］．铁道工程学报，2012( 2) : 55 －63．
Du Shihui． Study on High Stress of Cuihuashan Super Long Tunnel in Qinling Mountain Area［J］． Journal of Railway Engineering Society，2012( 2) : 55 － 63．
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2013, Vol. 30 
