| According to the composing medium of the slope, it is mainly divided into the rock quality slope and soil quality slope currently, the protection measures of the slope is also main to reinforce protection theories to carry on according to pure rock quality slope or pure soil quality slope, jumping up development toward the mountain area along with the high grade highway and deep foundation to dig, many places all appeared a property to lie between the rock quality slope and soil quality slope of thetransition slope——soil quality slope, and the engineering geology problem forcausing.This thesis induced a type soil quality slope to lie the characteristic of quality, tallying up a type soil quality the definition of the slope, pass analysis engineering solid example to prove that the transmission coefficient method with the traditional soil mechanics to the analysis soil quality slope of the stability isn't accurate, and pass the research soil quality slope the chain type of the breakage mechanism, put forward unloading a lotus is the stable most reason of the influence soil quality slope. Aim at the chain type of the slope breakage of a type of soil quality mechanism, put forward to break a chain to reduce a disaster to manage measure in early days, provided good ories instruction. for type's soil quality's designing and the disaster prevention.
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