岩石工程岩体各向异性的显现模式研究——以三峡工程永久船闸边坡工程为例

Visualization Research on Anisotropy of Rock Mass in Rock Project——Taking the Slope Engineering of Permanent Shiplocks of the Three Gorges Project as an example

岩体各向异性是岩石工程所面临的重要问题 ,是一切岩体力学及岩体水力学行为特性的主要控制因子 .本文以三峡工程永久船闸边坡工程为例 ,对岩石工程岩体各向异性的基本显现模式进行了研究 .岩体各向异性主要表现在岩体中的地应力、岩体宏微结构特性、岩体力学及岩体水力学参数等方面 :地应力状态主分量值在垂直剖面σ1≠σ2 ≠σ3 、主方向会发生明显的偏转 ;地表及岩体中岩体结构面的分布、岩体的微观特性结构均呈现明显的方向性 ;岩体力学参数沿卸荷方向的值低于沿垂直方向的值 ,而渗透系数K1≠K2 ≠K3 .

Anisotropy is one of the important problems in rock project,which controls generally all mechanical and hydraulic behaviors in rock mass.In this paper the authors discuss basic visualization of anisotropy of rock mass from the slope engineering of permanent shiplocks of the Three Gorges Project,Anisotropy of rock are shown in geostress,neotectonic stress field,macro and micro structure features of rock mass and parameters of rock mechanics and hydraulics.Variation of values and main directions of geostress along depth are obvious.Geometric features of rock structures in macro and micro scale are random with systematic rules.