秦岭北缘某深埋引水隧洞应力场特征研究

发布时间：2018-03-02 04:03

本文关键词： 水压致裂法实测应力构造应力回归反演最大水平主应力　出处：《地下空间与工程学报》2017年02期 　论文类型：期刊论文

【摘要】：岩体初始地应力场是研究地下洞室围岩稳定状况和隧洞选线的重要依据。应用水压致裂法对秦岭北缘某深埋引水隧洞应力进行测定,结果显示隧洞围岩应力等级属于中低~高应力水平,应力量值呈σ_Hσ_hσ_z特征,最大水平主应力方向为近NE向,与区域构造主压应力方位接近一致。基于实测数据,对工程区应力场进行回归反演,并结合区域构造应力对隧道沿线的深埋和浅埋段应力场分布规律进行了研究,以期为引水工程的设计和施工提供参考。
[Abstract]:The initial ground stress field of rock mass is an important basis for studying the stability of surrounding rock mass of underground cavern and the selection of tunnel route. The stress of a deep water diversion tunnel in the northern margin of Qinling Mountains is measured by hydraulic fracturing method. The results show that the stress grade of surrounding rock of tunnel belongs to medium or high stress level, the stress value is 蟽 H 蟽 h 蟽 z, the direction of maximum horizontal principal stress is near NE direction, which is close to the direction of regional tectonic principal compressive stress. Based on the measured data, the maximum horizontal principal stress direction is close to that of regional tectonic principal compressive stress. The regression inversion of the stress field in the engineering area is carried out, and the distribution of the stress field in the deep and shallow sections along the tunnel is studied in combination with the regional tectonic stress, in order to provide a reference for the design and construction of the diversion project.
【作者单位】：长江科学院水利部岩土力学与工程重点实验室;华北水利水电大学水利学院;郑州测绘学校;
【基金】：国家重点研发计划(2016YFC0401801) 国家自然科学基金(51204025) 中央级公益性科研院所基金(CKSF2013033,CKSF2014064YT,CKSF2015040/YT)
【分类号】：TV672.1

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