某可溶性软弱基座型斜坡的破坏方式及变形破坏机制

以仁义河特大桥南桥台南侧斜坡为例,分析研究了可溶性软弱基座型斜坡的破坏方式及其变形破坏力学机制,认为该斜坡的失稳破坏主要为崩塌破坏,并存在倾倒(外倾型)、倾滑(内倾型)和基座倾滑3种崩塌破坏方式,形成不同崩塌破坏方式的内在变形机制有弯曲一拉裂、弯曲一层间滑动和拉裂一滑移3种模式,从而为解决该类特殊斜坡工程问题提供了理论依据。

STUDY ON DESTRUCTION TYPES AND DEFORMATION AND DESTRUC-TION MECHANISM OF A SLOPE WITH SOLUBLE SOFT ROCK BASE

This paper takes the slope with soluble rocks and soft base as an example which lies in the south of the south abutment of the great Renyi River Bridge and analyzes the slope' s destruction types and its deforma-tion and destruction mechanism. It saggescs that the slope was destroyed by falling and there are three kinds of slope falling failure modes which are toppling(extroversion type),toppling-sliding(introversion type) and base toppling-sliding type and there are three kinds of deformation mechanism resulting in the different slope falling failure modes which are bending-fracturing ,bending-interlayer sliding and fracturing-sliding. This will be helpful to solve the engineering problem of the special slope.