长江科学院院报2011，Vol.28Issue(6)：55-58,86,5.
宝塔山特长隧道岩体应力场特征分析
Characteristics of In-situ Stress Field in Baotashan Extra-long Tunnel
摘要
Abstract
Baotashan tunnel is the longest highway tunnel in Shanxi province with a full length of 10 480 m and a maximum burial depth of 600 m. The complex topography and geomorphology and geological structures give rise to a complicated in-situ stress distribution in the tunnel area. To study the characteristics of rock in-situ stress field in the tunnel area, this paper firstly present the measured results of geostress by hydro-fracturing method, based on which the stress profile along the tunnel is obtained by FEM analysis, and finally the regional tectonic stress field is comprehensively analyzed from perspectives of topography and geomorphology, geologic structure, and geomechanics. The research manifested that in-situ stress in the test area can be defined as middle level stress, and the maximum horizontal principal stress in the tunnel design elevation is mainly concentrated in N42°E ～ N56°E, and regional tectonic stress field is consistent with in-situ stress field achieved by site test and numerical simulation.关键词
隧道工程/地应力测试/有限元分析/应力场特征Key words
tunnel engineering/ stress measurement/ finite element analysis/ stress field characteristic分类
交通工程引用本文复制引用
郭喜峰,张明欣,尹健民,刘元坤..宝塔山特长隧道岩体应力场特征分析[J].长江科学院院报,2011,28(6):55-58,86,5.基金项目
"十一五"国家科技支撑计划项目(2008BAB29B01) （2008BAB29B01）
水利部公益性行业科研专项项目(201001009) （201001009）
国家重点基础研究发展计划(973)项目(2011CB710603) （973）
中央级公益性科研院所基金项目(CKSF2010020) （CKSF2010020）
