【摘要】 为了研究引汉济渭工程中秦岭深埋隧洞地应力分布规律,以便为隧洞设计及施工提供依据,在重要工程部位进行了三维水压致裂法的地应力测试工作。测试结果表明:测试部位最大水平主应力为19.5～31.4 MPa,大于自重应力,说明地区是以水平应力场为主导;最大水平主应力方向集中为NW～EW向。结合实测结果及隧洞围岩力学参数可知,工程测试区域隧洞洞身段属于高～极高应力区。最后,从地应力的角度讨论了隧洞轴线的选择,并采用常用的Russenes判别法和Turchaninov判别法对洞室围岩进行了施工期岩爆预测分析。更多还原

【Abstract】 To acquire distribution of the ground stress at water diversion Project from the Han River to the Wei River,in order to provide basis for design and construction,3-dimension hydro-fracturing tests are carried out at the major project locations.The results reveal that the value of the maximum horizontal principal stress is larger than gravity stress along the tunnel axis.Horizontal stress field is dominated in this area,the maximum horizontal principal stress is from 19.5 to 31.4 MPa,Which is more than self weight stress The orientation is mainly from NW to EW direction.Considering the measured results and mechanical parameters of surrounding rock,it shows that the stress belongs to high or extremely high in engineering test area.In the end,this paper analyzes and forecasts rock burst of tunnel surrounding rock during construction by Russenes and Turchaninov discriminants,and it is useful for the project,which can provide the basis for engineering design and construction.更多还原