Study on Deformation and Failure Mechanism of Consequent Mudstone Slopes Through Numerical Simulation
Consequent mudstone rock slopes are widely existed in highway construction,and it is very important to study its deformation mechanism.Based on a consequent mudstone engineered rock slope in an expressway construction of Guizhou province,the generalized model was built to study the influ-ence of the combination of bedding plane dip angle and slope angle on deformation and failure mecha-nism of the slopes by using UDEC two-dimensional numerical simulation technology.The results indi-cated that when the main controlling structure plane of a slope is mudstone bedding planes,if the bed-ding dip angle is less than the slope angle,a plane sliding failure will occur along bedding planes.If the dip angle is equal to the slope angle,the buckling may happen.If the dip angle is greater than the slope angle,the slope will produce slip-bending deformation.When plane sliding failure occurs,the larger the slope angle,the more likely the slope is to undergo deformation and failure,and the larger the slope scale,the faster the failure rate.When the slope collapses,bedding sliding failure occurs in the upper part of the slope body,and bending deformation occurs in the bottom of the strong weathe-ring layer under the compression state.When the deformation and failure model is slip-bending,the top of the slope will slide,and its middle and lower part will have bend out of the slope,and failure scale increases with the increase of slope angle.
万方数据
维普
