当金山隧道区域地应力特征分析与应用
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摘要
研究目的:敦格铁路当金山隧道位于兴蒙褶皱系与祁连山褶皱系之间的阿尔金断隆,隧道埋深大,地质条件复杂,高地应力是隧道施工中的主要地质问题。通过对隧道区域地应力特征分析,分析预测隧道施工中与高地应力有关的地质问题。研究结论:(1)当金山隧道区地应力高,以水平应力为主,属高地应力区;(2)根据切向应力准则判断,隧道施工中埋深较大地段较完整的云母石英片岩、花岗岩有发生轻微岩爆的可能,绿泥石英片岩发生岩爆的可能性小;(3)根据隧道区的地应力特征及岩性特征分析,断层破碎带(尤其是F5断层)岩质软弱,在施工中有发生较大变形的可能,其他地段发生变形的可能性较小;(4)本文采用的隧道地应力分析与评价方法及与高地应力有关主要地质问题的分析,对类似工程具有参考和借鉴意义。
Research purposes: The Dangjinshan Tunnel of Dunhuang-Golmud Railway,is located in the Altyn fault system which is between Xing-Meng fold system and Qilian Mountain fold system. The tunnel with high buried depth will encounter a series geological problems such as high geostress,complex geological condition,etc. Through studying the geostress characteristics in this region,the geological problems related to the high geostress can be analyzed and predicted in the tunnel construction.Research conclusions:( 1) The tunnel is located in the region with high geostress and the horizontal stress is the maximum principal stress.( 2) According to tangent stress principle,the slight rock burst would happen along the deeply-buried sections with integrate mica-quartzose schist or granite and scarcely happen along the sections with chlorite-schist.( 3) Based on analysis of the geostress and lithology characters,the large deformation may happen in the fault fracture zone( especially F5) with soft rock and in other regions the deformation may not happen.( 4) The geostress analysis,evaluation method and analysis of engineering geological problems introduced by high geostress in the paper have reference significance for other tunnel construction.
Research purposes: The Dangjinshan Tunnel of Dunhuang-Golmud Railway,is located in the Altyn fault system which is between Xing-Meng fold system and Qilian Mountain fold system. The tunnel with high buried depth will encounter a series geological problems such as high geostress,complex geological condition,etc. Through studying the geostress characteristics in this region,the geological problems related to the high geostress can be analyzed and predicted in the tunnel construction.Research conclusions:( 1) The tunnel is located in the region with high geostress and the horizontal stress is the maximum principal stress.( 2) According to tangent stress principle,the slight rock burst would happen along the deeply-buried sections with integrate mica-quartzose schist or granite and scarcely happen along the sections with chlorite-schist.( 3) Based on analysis of the geostress and lithology characters,the large deformation may happen in the fault fracture zone( especially F5) with soft rock and in other regions the deformation may not happen.( 4) The geostress analysis,evaluation method and analysis of engineering geological problems introduced by high geostress in the paper have reference significance for other tunnel construction.
引文
[1]中国地震局地壳应力研究所.敦格铁路当金山隧道地应力测量分析报告[R].北京:中国地震局地壳应力研究所,1991.The Institute of Crustal Dynamics.The Regional Geostress Characteristics Analysis Report of Dangjinshan Tunnel of Dunhuang to Geermu Railway[R].Beijing:The Institute of Crustal Dynamics,1991.
[2]中铁第一勘察设计院集团有限公司.敦格铁路当金山隧道初步设计[R].西安:中铁第一勘察设计院集团有限公司,2012.China Railway First Survey and Design Institute Group Co.Ltd.Preliminary Design of Dangjinshan Tunnel of Dunhuang to Geermu Railway[R].Xi'an:China Railway First Survey and Design Institute Group Co.Ltd,2012.
[3]GB 50218—1994,工程岩体分级标准[S].GB 50218—1994,Standard for Engineering Classification of Rock Masses[S].
[4]蔡美峰.地应力测量原理和技术[M].北京:科学出版社,2000.Cai Meifeng.Geostress Measure Principle and Technology[M].Beijing:Science Press,2000.
[5]张永双,熊探宇,杜宇本,等.高黎贡山深埋隧道地应力特征及岩爆模拟试验[J].岩石力学与工程学报,2009(11):2286-2294.Zhang Yongshuang,Xiong Tanyu,Du Yuben,etc.Geostress Characteristic and Simulation Experiment of Rock Burst of a Deep-buried Tunnel in Gaoligong Mountain[J].Chinese Journal of Rock Mechanics and Engineering,2009(11):2286-2294.
[6]姜云,王兰生.深埋长大公路隧道高地应力岩爆和岩溶突涌水问题及对策[J].岩石力学与工程学报,2002(9):1319-1323.Jiang Yun,Wang Lansheng.Problems of High Stress Rock Burst and Water Outburst and Counter Measures in Deep and Long Tunnels[J].Chinese Journal of Rock Mechanics and Engineering,2002(9):1319-1323.
[7]刘军强,施建仁,王水晶,等.地应力测量在深埋长大隧道岩爆预测中的应用[J].地下空间与工程学报,2011(4):776-780.Liu Junqiang,Shi Jianren,Wang Shuijing.etc.Application of Geostress Measurement for Rockburst Forecast in Deep-buried Long and Large Tunnels[J].Chinese Journal of Underground Space and Engineering,2011(4):776-780.
[8]徐则明,黄润秋,范柱国,等.长大隧道岩爆灾害研究进展[J].自然灾害学报,2004(2):16-24.Xu Zemin,Huang Runqiu,Fan Zhuguo,etc.Progress in Research on Rock Burst Hazard of Long Tunnel with Large Section[J].Journal of Natural Disasters,2004(2):16-24.
[9]陈大桂.新建向莆铁路高盖山隧道岩爆预测研究[J].福建地质,2010(3):264-268.Chen Dagui.Advanced Research of Rock Burst in the Gaogaishan Tunnel of Xiangtang-Putian Railway[J].Geology of Fujian,2010(3):264-268.
[10]李瑞峰.克什克腾越岭隧道区地应力特征分析[J].铁道工程学报,2011(5):52-57.Li Ruifeng.Analysis of Characteristics of Ground Stress in Area of Keshiketeng Mountain Tunnel[J].Journal of Railway Engineering Society,2011(5):52-57.
[2]中铁第一勘察设计院集团有限公司.敦格铁路当金山隧道初步设计[R].西安:中铁第一勘察设计院集团有限公司,2012.China Railway First Survey and Design Institute Group Co.Ltd.Preliminary Design of Dangjinshan Tunnel of Dunhuang to Geermu Railway[R].Xi'an:China Railway First Survey and Design Institute Group Co.Ltd,2012.
[3]GB 50218—1994,工程岩体分级标准[S].GB 50218—1994,Standard for Engineering Classification of Rock Masses[S].
[4]蔡美峰.地应力测量原理和技术[M].北京:科学出版社,2000.Cai Meifeng.Geostress Measure Principle and Technology[M].Beijing:Science Press,2000.
[5]张永双,熊探宇,杜宇本,等.高黎贡山深埋隧道地应力特征及岩爆模拟试验[J].岩石力学与工程学报,2009(11):2286-2294.Zhang Yongshuang,Xiong Tanyu,Du Yuben,etc.Geostress Characteristic and Simulation Experiment of Rock Burst of a Deep-buried Tunnel in Gaoligong Mountain[J].Chinese Journal of Rock Mechanics and Engineering,2009(11):2286-2294.
[6]姜云,王兰生.深埋长大公路隧道高地应力岩爆和岩溶突涌水问题及对策[J].岩石力学与工程学报,2002(9):1319-1323.Jiang Yun,Wang Lansheng.Problems of High Stress Rock Burst and Water Outburst and Counter Measures in Deep and Long Tunnels[J].Chinese Journal of Rock Mechanics and Engineering,2002(9):1319-1323.
[7]刘军强,施建仁,王水晶,等.地应力测量在深埋长大隧道岩爆预测中的应用[J].地下空间与工程学报,2011(4):776-780.Liu Junqiang,Shi Jianren,Wang Shuijing.etc.Application of Geostress Measurement for Rockburst Forecast in Deep-buried Long and Large Tunnels[J].Chinese Journal of Underground Space and Engineering,2011(4):776-780.
[8]徐则明,黄润秋,范柱国,等.长大隧道岩爆灾害研究进展[J].自然灾害学报,2004(2):16-24.Xu Zemin,Huang Runqiu,Fan Zhuguo,etc.Progress in Research on Rock Burst Hazard of Long Tunnel with Large Section[J].Journal of Natural Disasters,2004(2):16-24.
[9]陈大桂.新建向莆铁路高盖山隧道岩爆预测研究[J].福建地质,2010(3):264-268.Chen Dagui.Advanced Research of Rock Burst in the Gaogaishan Tunnel of Xiangtang-Putian Railway[J].Geology of Fujian,2010(3):264-268.
[10]李瑞峰.克什克腾越岭隧道区地应力特征分析[J].铁道工程学报,2011(5):52-57.Li Ruifeng.Analysis of Characteristics of Ground Stress in Area of Keshiketeng Mountain Tunnel[J].Journal of Railway Engineering Society,2011(5):52-57.
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