成兰铁路地应力分布特征及工程评价
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摘要
通过对成兰铁路沿线地质构造特征及32个深孔186个测段的地应力数据资料的研究分析,按地质构造单元总结地应力方向及量值分布规律,得出地应力方向及量值与新构造格局存在很强的力学相关性,同一块体内地应力相对均匀,靠近断裂地应力方向普遍扭转且地应力侧压力系数明显增长;此外,本文结合成兰铁路工程特点确定各构造区地应力计算指标,划分地应力不利段落,并评价其对隧道围岩稳定性、软岩大变形和岩爆等工程影响。
In this paper,the authors analysed the geological structure feature and the crustal stress data in 32 deep holes with 186 test sections of the Chengdu-Lanzhou railway;based on the result of the orientation and value distribution of crustal stress in geological structure unit,pointed out in the same geologic block with well-distributed crustal stress,however,the orientation deflection and the lateral pressure coefficient sharply increasing of the crustal stress near to the fault;and there is much mechanics correlation between the orientation and value of crustal stress and the new structure tectonic.Besides,according to the engineering feature of the Chengdu-Lanzhou railway,divided the disadvantageous crustal stress area,determined stress calculation parameters,and evaluated the engineering influence of crustal stress on the stability of rock mass around underground,deformation of high stress soft rock and rock burst.
In this paper,the authors analysed the geological structure feature and the crustal stress data in 32 deep holes with 186 test sections of the Chengdu-Lanzhou railway;based on the result of the orientation and value distribution of crustal stress in geological structure unit,pointed out in the same geologic block with well-distributed crustal stress,however,the orientation deflection and the lateral pressure coefficient sharply increasing of the crustal stress near to the fault;and there is much mechanics correlation between the orientation and value of crustal stress and the new structure tectonic.Besides,according to the engineering feature of the Chengdu-Lanzhou railway,divided the disadvantageous crustal stress area,determined stress calculation parameters,and evaluated the engineering influence of crustal stress on the stability of rock mass around underground,deformation of high stress soft rock and rock burst.
引文
[1]中国地震局地壳应力研究所.新建成兰至兰州铁路地应力测试报告[R].2013.
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[3]许兆义.工程地质学基础[M].北京:中国铁道出版社,2011.
[4]刘佑荣,唐辉明.岩体力学[M].北京:化学工业出版社,2010.
[5]朱永全,宋玉香.隧道工程[M].北京:中国铁道出版社,2010.
[6]张倬元,王士天,王兰生.工程地质分析原理[M].北京:地质出版社,1994.
[7]李忠权,刘顺.构造地质学[M].北京:地质出版社,2010.
[8]铁路工程地质手册[K].北京:中国铁道出版社,1999.
[9]GB50218-1994,工程岩体分级标准[S].
[10]GB50287-2006,水力发电工程地质勘察规范[S].
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[12]武利平.铁路客站高大空间装饰吊顶施工技术研究[J].建筑技术,2014,45(2):181-184.
[13]邓美龙,黄常波,李钟,等.盾构穿越铁路安全施工技术[J].建筑技术,2009,40(11):984-986.
[14]王为凯.京九铁路黄河特大桥滩地沉井施工[J].建筑技术,2002,33(11):835-836.
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