土体的结构性对边坡突变失稳影响研究综述

结构性土具有胶结、大孔隙的特点,以该土质为主的边坡在变形与破坏过程中表现出与一般素土边坡明显不同的特性。目前,有关结构性土岩土本构关系的研究在国内外尚处发展阶段,用于理论分析及具体工程指导的岩土模型均不成熟,更未达成共识,造成了结构性土坡稳定性的研究无法深入开展,存在较大局限性。针对这一问题,对国内外有关结构性土坡稳定性的研究进行了总结,对其中以黄土、花岗岩残积土等代表性结构性土为研究对象的室内外边坡试验、理论公式推导等进行了重点分析。归纳了以数值模拟为主的结构性土坡研究存在的应用局限性较大、边坡失稳特征反映不完整等问题,并提出引入突变理论来分析该类边坡失稳问题的方法,为结构性土坡稳定性研究的发展方向及研究重点提出了相关建议。

Review on the Effects of Soil Structure on Slope Failure and Instability

The structural soil has the characteristics of cementing and macropore ,therefore the slope is obviously different from the general soil slope in the process of deformation and failure .At present the research on the constitutive relation of structural soils is still at the stage of development at home and abroad .The geotechnical model for theoretical analysis and concrete engineering guidance is not mature ,and there is no consensus ,which leads to the stability of structural soil of the study cannot be carried out in depth ,there are more limitations .Focusing on this problem ,this research summarized the stability of structural soil slope at home and abroad ,such as the indoor and outdoor slope test methods ,the theoretical formula derivation of the representative soils such as loess and granite residual soil are studied .This paper summarizes the problems such as the large application of structural slope and the incomplete characteristics of slope instability ,and pro-posed the method of introducing catastrophe theory to analyze the slope instability problem .The development direction and research focus of structural slope stability research are also discussed .