多目标条件下边坡系数优化设计

摘要

边坡系数在边坡设计中具有重要的意义，它不仅对边坡稳定具有重大影响，并且与工程占地面积、工程造价及边坡失稳后的损失密切相关。结合以上因素对边坡系数进行优化设计分析，引入综合影响因子的概念；选取一系列边坡系数，寻找各边坡系数下的最危险滑动面，计算最小安全系数和综合影响因子；通过对某边坡工程的边坡进行分析，发现随着边坡系数的增大，边坡的安全系数增大，综合影响因子先减小后增大，呈现出抛物线变化的趋势。因此，可以选取综合影响因子为最小值时所对应的边坡系数作为设计边坡系数，达到优化设计的目的。%Slope parameter is an importance factor in the slope design,it is not only has significant influence on the slope stability,but also is closely related to the engineering area using,costing and the cost after the slope instability.The con-cept of comprehensive influence factor is introduced to optimizing the slope parameter with the above factors in the slope de-sign.A series of slope parameter is selected first,then the most dangerous sliding surface is found and the minimum safety factor is calculated under each slope parameter.A slope engineering is analyzed,it is found that the safety factor of slope is increased with the increasing of the slope parameter,and the comprehensive influence factor presents the parabola change trend that firstly increases and then decreases.So the slope parameter can be chosen under the minimum value of compre-hensive influence factor,as the design parameter achieving the goal of optimization design.