【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。更多还原

【Abstract】 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.更多还原