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溪谷输变电站工程场地具有较复杂的双层地质结构,岩土体拉分变形明显。场地后缘及底部岩土体的主应力和剪应力集中明显,堆积体内部岩体处于拉分松弛状态,岩土体的潜在变形模式以蠕滑-拉裂为主。在水库蓄水与地震共同作用的极限工况下,场地处于潜在不稳定状态。
The construction site of the valley power transmission project has a complex double-layer geological structure, and the pull-point deformation of rock and soil body is obvious. The main stress and shear stress of the trailing edge and the bottom rock mass are concentrated obviously. The rock mass inside the pile body is in the state of relaxation and relaxation. The potential deformation mode of rock and soil body is dominated by the creep-pull crack. The site is in a state of potential instability under extreme conditions where reservoir water and earthquakes work together.