反倾岩质边坡倾倒变形影响因素分析

Analysis on the Influencing Factors of Toppling Deformation of Toppling Rock Slope

倾倒变形是反倾岩质边坡最为常见的破坏形式,研究其影响因素是分析倾倒变形形成机制的基础。以连云港东疏港高速公路中云台山路堑边坡为例,基于正交试验设计理论,运用ABAQUS有限元软件,对边坡坡高、边坡坡角、岩层厚度及岩层倾角4个影响因素进行分析。结果表明,边坡坡高是边坡倾倒变形的主要影响因素,其次为岩层厚度、岩层倾角和边坡坡角;边坡稳定性与岩层厚度呈正相关关系,与边坡坡高和坡角呈负相关关系;当岩层倾角为75°左右时,边坡最易发生倾倒变形。

Toppling deformation is the most common failure form of the rock slope,and the study of its influencing factors is the basis of the analysis of the formation mechanism of toppling deformation.Taking Middle Yuntai Mountain cutting slope of Dongshugang expressway in Lianyungang as an example,based on the theory of orthogonal experiment design,by using the finite element software ABAQUS,the four influencing factors of slope height,slope angle,thickness of strata and dip angle of strata are analyzed.And the results show that slope height is the main influencing factor of the slope toppling deformation,followed by the thickness of strata,dip angle of strata and slope angle.The stability of the slope is positively correlated with the thickness of strata,and negatively correlated with the slope height and slope angle.When the dip angle of strata is about 75°,the slope is most prone to toppling deformation.