›› 2013, Vol. 34 ›› Issue (3): 827-832.

• Geotechnical Engineering • Previous Articles     Next Articles

Method for determining supporting load of deep tunnel on high-speed railway in gypsum breccia stratum

HE Ben-guo1, 2，ZHU Yong-quan1, 2，SUN Ming-lei2，ZHANG Zhi-qiang1，SUN Yuan-guo3   

  1. 1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China; 2. School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China; 3. China Railway Fifth Survey and Design Institute Group Co., Ltd., Beijing 102600, China
  • Received:2012-02-21 Online:2013-03-11 Published:2013-03-20

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Abstract: Reasonable method for determining supporting load of deep tunnel is a critical scientific problem during design and construction at present. Taihang mountain tunnel goes through gypsum breccia region of about 4 410 meters on Shijiazhang-Taiyuan high-speed passenger railway. In situ experiments on supporting load were carried out to investigate statistical surrounding rock pressure of primary support and contact pressure of lining. According to Terzaghi theory, Bierbaumer theory, Xie Jia-xiu theory, Code of Design on Tunnel of Railway and M. M. Promojiyfakonov theory, surrounding rock pressure is calculated; and comparison between the theoretical values and the monitoring data is made. The results show that surrounding rock pressure is dominated by vertical mainly. Calculation result by Terzaghi theory is mostly close to monitoring value. Obviously, vertical and horizontal distribution patterns are different from traditional calculation methods. Vertical pressure is recommended as double peak type or uniform distribution. Horizontal pattern is recommended as folded line type. Furthermore, primary support and lining bear load compatibly. The ratio of lining is about 50.1%. The results can provide references for construction of deep tunnel on high-speed railway in gypsum breccia stratum and similar geological tunnel.

Key words: gypsum breccia, railway tunnel, surrounding rock pressure, load distribution

CLC Number: 

  • U 25
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