摘要
通过工程地质调查,并收集近场区地应力测试结果。在此基础上,建立隧洞近场区地应力场反演的平面地质力学模型,采用有限元反演分析,获得近场区地应力场的分布特征:场区内最大主应力方向主要为NE向,局部存在高应力,应力最大值σ1=9.0 MPa。最小主应力的量值多在1~2 MPa,最大剪应力一般在2 MPa以下。
Through the engineering geological survey,and the near field stress test results,a plane geomechanical model for the inversion of the earth stress field in the near field area of the tunnel is established.Finite element inversion analysis is applied to obtain the distribution characteristics of the ground stress field in the near field area:The direction of the maximum principal stress in the region is mainly northeast,and high stress exists in the local area.The maximum stressσ1 is 9.0 MPa.The minimum principal stress is usually 1~2 MPa,and the maximum shear stress is generally below 2 MPa.
作者
祁军
贾东彦
张海宾
QI Jun;JIA Dongyan;ZHANG Haibin(Qinghai Survey and Design Institute of Water Conservancy and Hydropower, Xining 810000,China)
出处
《西北水电》
2020年第5期43-45,50,共4页
Northwest Hydropower
关键词
隧洞
近场区
地应力
tunnel
near field region
in-situ stress
