基于ABAQUS强度折减法某铀尾矿坝稳定性分析

将ABAQUS有限元软件和强度折减法相结合,充分利用ABAQUS的强大后处理能力对某一铀尾矿坝稳定性进行分析.通过把坡面的特征控制点的位移突变和滑移面塑性区从坡脚到坡顶的贯通作为边坡整体失稳的标志,当滑移面的塑性区贯通,塑性应变和特征控制点的位移发生突变时,则坝坡就处于滑动破坏临界状态,而此时的强度折减系数就定义为坝坡稳定的最小安全系数.通过某铀尾矿坝稳定性分析的实例,可以准确形象的预测出坝潜在坡滑动面的位置和评价坝坡的稳定性,尤其对地形复杂的边坡稳定性分析简单适用.

The Analysis of a Uranium Tailings Dam Stability Based on ABAQUS Strength Reduction Method

From the combination of the finite software of ABAQUS and strength reduction method,making full use of powerful post-processing ability of ABAQUS,this study analyzes a uranium tailings dam stability.The displacement mutation of slope feature control points and plastic zone breakthrough of slipping plane from the dam slope toe to top are used as a symbol of the whole slope instability.When plastic zone in the slope sliding surface is connected from the slope toe to top,plastic strain and displacement of characteristic control points result in mutation,the dam slope is in a critical state of sliding failure,while the strength reduction factor is defined as the minimum safety coefficient of dam slope stability.Through an example of a uranium tailings dam stability analysis,it can predict accurately and vividly dam slope potential sliding surface position and evaluate the stability of dam slop,especially for the stability analysis of complex terrain slope,which is a simple and practicable method.