岩土力学2011，Vol.32Issue(5)：1452-1459,8.
基于围岩片帮形迹的宏观地应力估计方法探讨
Evaluation method of general geostress based on spalling features of wall rock
摘要
Abstract
According to the viewpoint that the kind of bnttle spalling of wall rock is the embodiment of in-situ rock stress, a new evaluation method of general geostress is put forward based on spalling features of wall rock.Firstly, the spatial relationship of three principal stresses is gained through the analysis of spalling features of wall rock fiom the aspect of spatial distribution and intensity relation.Then, the direction of maximum principal stress is counted according to the trend of spalling's split veins.The values of three principal stresses are calculated also based on the stress threshold values of spalling and threshold values of crack initiation.The in-situ stress evaluation of right powerhouse region in Baihetan hydropower station is validated by the local measured in-situ rock stress results and contrastively numerical analysis of different directions of maximum principal stress, which prove that the method is reasonable and useful for understanding the break of wall rock and checking the measured in-situ rock stress results.关键词
地应力估计/片帮形迹/劈裂纹/围岩破坏/白鹤滩水电站分类
交通工程引用本文复制引用
江权,冯夏庭,徐鼎平,赵阳,江亚丽,黄可..基于围岩片帮形迹的宏观地应力估计方法探讨[J].岩土力学,2011,32(5):1452-1459,8.基金项目
国家自然科学基金项日(No.40902090) （No.40902090）
中科院知识创新工和项目(No.KZCX2-EW-110) （No.KZCX2-EW-110）
国家重点基础研究发展规划973项目(No.2010CB732006). （No.2010CB732006）
