低地应力区地下洞室开挖后围岩应力数值模拟
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摘要
以西北地区某水利工程地下洞室工程为例,采用弹塑性二维有限元法对低地应力区地下洞室围岩开挖后围岩应力进行了数值模拟研究,模拟出了低地应力区地下洞室围岩开挖后围岩应力值及其分布规律。结果表明,低地应力区地下洞室开挖后洞室围岩形成应力集中现象,侧壁位置处产生的压应力值大于洞顶位置压应力值,且洞顶产生拉应力。该研究成果将有助于进一步研究低地应力区地下洞室围岩变形破坏机理及其稳定性,对保障地下洞室工程的圆满进行具有重要的理论价值和现实意义。
By taking one hydraulic underground excavation engineering project in the Northwest of China as an example,the surrounding rockmass stress field of underground excavation in the low ground stress regions is simulated with two-dimension elastico-plastic Finite Element Method(FEM).The simulating results indicate: the stress concentration is formed in surrounding rockmass;the compress stress at the roof of underground excavation is especially smaller than those at both sides,and the tension stress is formed at the roof.Those results have great significance for studying the deformation and failure mechanism of surrounding rockmass,meanwhile,they will also play a very important role in ensuring the progress in underground excavation engineering projects.1 tab,7 figs,11 refs.
By taking one hydraulic underground excavation engineering project in the Northwest of China as an example,the surrounding rockmass stress field of underground excavation in the low ground stress regions is simulated with two-dimension elastico-plastic Finite Element Method(FEM).The simulating results indicate: the stress concentration is formed in surrounding rockmass;the compress stress at the roof of underground excavation is especially smaller than those at both sides,and the tension stress is formed at the roof.Those results have great significance for studying the deformation and failure mechanism of surrounding rockmass,meanwhile,they will also play a very important role in ensuring the progress in underground excavation engineering projects.1 tab,7 figs,11 refs.
引文
[1]丁恩保.低地应力及其工程地质意义[J].水文地质工程地质,1993,(4):1-4.DING En-bao.Low rock stress and its engineeringgeological signification[J].J Hydrogeology and Engi-neering Geology,1993,(4):1-4.
[2]陶振宇.对岩体初始应力的初步认识[J].水文地质工程地质,1980,(2):12-17.TAO Zheng-yu.Study of rockmass initial stress[J].J Hydrogeology and Engineering Geology,1980,(2):12-17.
[3]韩文峰.黄河黑山峡大柳树松动岩体工程地质研究[M].兰州:甘肃科学技术出版社,1993.HAN Wen-feng.Study on loose rockmass engineeringgeology of Daliushu Heishanxia,Yellow river[M].Lanzhou:Gansu Science and Technology Press,1993.
[4]孙广忠.工程地质与地质工程[M].北京:地震出版社,1993.SUN Guang-zhong.Engineering geology and geolog-ical engineering[M].Beijing:Seismic Press,1993.
[5]彭建兵,毛彦龙,范文.区域稳定动力学[M].北京:科学出版社,2002.PENG Jian-bing,MAO Yan-long,FAN Wen.Dy-namics of region stability[M].Beijing:SciencePress,2002.
[6]徐林生,王兰生.二郎山公路隧道岩爆特征与防治措施研究[J].中国公路学报,2003,16(1):74-76.XU Lin-sheng,WANG Lan-sheng.Research onrockburst character and prevention measure of ErlangMountain highway tunnel[J].China Journal of High-way and Transport,2003,16(1):74-76.
[7]范文,常中华,彭建兵,等.黑河水库单薄分水岭渗透稳定性分析[J].长安大学学报(自然科学版),2002,22(5):68-72.FAN Wen,CHANG Zhong-hua,PENG Jian-bing,etal.Thin mountain ridge seepage stability analysis inHeihe reservoir[J].Journal of Chang’an University(Natural Science Edition),2002,22(5):68-72.
[8]赵法锁.坡体平面旋转机理及稳定性研究[M].西安:西安地图出版社,1999.ZHAO Fa-suo.Study on mechanism of slope planerotation and stability[M].Xi’an:Xi’an Map Press,1999.
[9]黄润秋,许强,陶连金.地质灾害过程模拟和控制研究[M].北京:科学出版社,2002.HUANG Run-qiu,XU Qiang,TAO Lian-jin.Simu-lation and control study of geological hazard process[J].Beijing:Science Press,2002.
[10]蒋鑫,魏永幸,邱延峻.斜坡软弱地基填方工程数值仿真[J].交通运输工程学报,2002,2(3):41-46.JIANG Xin,WEI Yong-xing,QIU Yan-jun.Numer-ical simulation of subgrade embankment on slopedweak ground[J].Journal of Traffic and Transporta-tion Engineering,2002,2(3):41-46.
[11]李宁,李永刚,张平.碎裂块体围岩安全监测与仿真反演分析[J].岩土工程学报,2000,22(2):170-173.LI Ning,LI Yong-gang,ZHANG Ping.A simula-ting inversion method for an opening in discrete rockmasses[J].Chinese Journal of Geotechnical Engi-neering,2000,22(2):170-173.
[2]陶振宇.对岩体初始应力的初步认识[J].水文地质工程地质,1980,(2):12-17.TAO Zheng-yu.Study of rockmass initial stress[J].J Hydrogeology and Engineering Geology,1980,(2):12-17.
[3]韩文峰.黄河黑山峡大柳树松动岩体工程地质研究[M].兰州:甘肃科学技术出版社,1993.HAN Wen-feng.Study on loose rockmass engineeringgeology of Daliushu Heishanxia,Yellow river[M].Lanzhou:Gansu Science and Technology Press,1993.
[4]孙广忠.工程地质与地质工程[M].北京:地震出版社,1993.SUN Guang-zhong.Engineering geology and geolog-ical engineering[M].Beijing:Seismic Press,1993.
[5]彭建兵,毛彦龙,范文.区域稳定动力学[M].北京:科学出版社,2002.PENG Jian-bing,MAO Yan-long,FAN Wen.Dy-namics of region stability[M].Beijing:SciencePress,2002.
[6]徐林生,王兰生.二郎山公路隧道岩爆特征与防治措施研究[J].中国公路学报,2003,16(1):74-76.XU Lin-sheng,WANG Lan-sheng.Research onrockburst character and prevention measure of ErlangMountain highway tunnel[J].China Journal of High-way and Transport,2003,16(1):74-76.
[7]范文,常中华,彭建兵,等.黑河水库单薄分水岭渗透稳定性分析[J].长安大学学报(自然科学版),2002,22(5):68-72.FAN Wen,CHANG Zhong-hua,PENG Jian-bing,etal.Thin mountain ridge seepage stability analysis inHeihe reservoir[J].Journal of Chang’an University(Natural Science Edition),2002,22(5):68-72.
[8]赵法锁.坡体平面旋转机理及稳定性研究[M].西安:西安地图出版社,1999.ZHAO Fa-suo.Study on mechanism of slope planerotation and stability[M].Xi’an:Xi’an Map Press,1999.
[9]黄润秋,许强,陶连金.地质灾害过程模拟和控制研究[M].北京:科学出版社,2002.HUANG Run-qiu,XU Qiang,TAO Lian-jin.Simu-lation and control study of geological hazard process[J].Beijing:Science Press,2002.
[10]蒋鑫,魏永幸,邱延峻.斜坡软弱地基填方工程数值仿真[J].交通运输工程学报,2002,2(3):41-46.JIANG Xin,WEI Yong-xing,QIU Yan-jun.Numer-ical simulation of subgrade embankment on slopedweak ground[J].Journal of Traffic and Transporta-tion Engineering,2002,2(3):41-46.
[11]李宁,李永刚,张平.碎裂块体围岩安全监测与仿真反演分析[J].岩土工程学报,2000,22(2):170-173.LI Ning,LI Yong-gang,ZHANG Ping.A simula-ting inversion method for an opening in discrete rockmasses[J].Chinese Journal of Geotechnical Engi-neering,2000,22(2):170-173.
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