新建县风景水库北坡山体滑坡机制研究

通过对滑坡体和其发生环境的调查分析，新建县风景水库北坡山体滑坡具以下因素作用和发生机制：片麻岩层理走向与坡面平行是形成滑落面的重要地质基础；坡面冲沟发育、筑坝取土造成的坡角临空面是滑坡的地貌条件；粘粒含量和渗透率随土壤深度递减的剖面特性是水份在滑落面积滞并与粘粒作用导致抗剪强度减低的主要原因；滑坡前和发生时的雷雨条件是造成土体增重和促发牵引动力的重要触发因素。

An Analysis on the Mechanism of the Landslide in the North Hill of the Scenery Reservoir in Xinjian County

The investigation and analysis on the slip mass and its occurrence environment showed that the landslide on the north hill around the Scenery Reservoir in Xinjian County had the following factors and mechanism: The tread of the stratification of gneiss runs parallel to the sloping face so as to form a slip plane,which is the important geological basis.The condition of the slip geomorphic is that on one hand,the stormed cracks on the slope have been cultured,on another hand, the hanging surface has been formed at the base of slope by borrowing earth for the building of the dam.The characteristics of the soil profile that the deep going is accompanied by a progressive decrease in clay content and that the accumulated moisture on the slip plane together with the clay function resulted in the reduction of the shear strength in the soft plane.The important causing factor was the condition before and during the storm which added the mass weight and caused the drawing power.