北疆深埋隧洞地应力与区域应力场相关性研究  

Correlation between Tunnel Stress and Regional Stress Field in North Xinjiang

作　　者：尹健民[1] 周春华[1,2] 李云安[2] 崔东[3] 汪洋[1] 

机构地区：[1]长江科学院水利部岩土力学与工程重点实验室,武汉430010 [2]中国地质大学工程学院,武汉430074 [3]新疆水利水电勘测设计研究院,乌鲁木齐830000

出　　处：《长江科学院院报》2014年第11期42-46,共5页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金项目(51204025);国家重点基础研究发展计划973项目(2011CB710600);中央级公益性科研院所基本科研业务费项目(CKSF2013033/YT;CKSF2014064/YT)

摘　　要：在地应力实测资料匮乏的北疆阿尔泰地区,对某深埋引水隧洞进行了水压致裂法地应力场测试。实测结果与区域构造应力场的对比分析表明,研究区域为构造型应力场,最大水平主应力方位与地震的震源机制解一致,呈NNE向,与区域构造应力场相吻合;且埋深约300 m以上,平均水平应力与铅直应力的比值不再变小(接近1.0)。应加强该区深部构造应力场研究,重视现场实测手段的应用,提高对区域应力场的宏观把握,为指导类似深埋工程的设计和施工提供参考。Stress measurement data is in lack in Northern Xinjiang＇ s Altai region.We tested the stress field of a deep water diversion tunnel in this region by using hydraulic fracturing method.Test result and analysis reveal that the tested stress field is tectonic stress type and the maximum horizontal principal stress orientation is NNE,which is in consistency with the focal mechanism solution.Moreover,it reveals that the ratio of average horizontal stress to vertical stress changes no smaller （close to 1.O） in the depth of over 300 m.We should strengthen the research on tectonic stress field in deep area and pay attention to the application of in-situ measurement means to improve the macroscopic understanding of regional stress field.

关 键 词：深埋隧洞 地应力 北疆地区 构造应力场 水压致裂法 

分 类 号：TV221.2[水利工程—水工结构工程] TV672.1