长江三峡库区构造特征与滑坡分布关系

Relationship Between Landslides and Structural Featurein Three Gorges Reservoir

长江三峡库区滑坡体的形成、演化与滑坡所处区域构造、局部构造特征以及新构造期的构造活动具有密切的成因联系,区域构造演化和局部构造的后期改造控制滑坡体的存在,第一,前期构造的“反转”变形是在薄皮构造控制下滑坡形成的一种可能的形式;第二,裂隙的组合形式、组数及其与河流流向的关系控制滑坡的形成和规模;第三,不同期次构造的复合部位是滑坡发生的主要集中地区,第四,新构造应力场作用下的滑坡的发生、发展、演化不是任意的,地壳不均衡隆升造成坡体不同的演化阶段,控制滑坡类型的时空分布;水平运动对滑坡的滑动方向、滑坡的破坏强度有重要影响,主要体现为新构造应力场与自重应力场的叠加。

The formation and evolution of landslips were closely to regional and local tectonics in the Yangtze Three Gorges Reservoir.Appearance of landslips were controlled by regional tectonic evolution and by local tectonic reform later also.The first,landslips were properly formed as a result of deformation of reverse structure controlled by thin structure.The second,fissure system and the Yangtze direction controlled the landslips formation and scale.The third,landslips appeared mostly in the compound place of s...