燕  彬^1,2    黄  义¹
    （1 西安建筑科技大学 710055； 2 济南大学 250022）

[提要]  在弹性支点法有限元正分析的基础上，利用非线性规划中的最优化方法——单纯形加速法，采用直接反分析法对深基坑被动土体参数m值作了反分析；而且利用反分析所得参数m值进行了有限元正分析，以预测下一开挖阶段可能产生的侧向位移，均获得较满意结果。
[关键词]  弹性支点法  单纯形加速法  m值  反分析

The soil parameter-m-value is studied for excavation engineering by means of the method of back-analysis, with the simplex method included mathematical optimization, which is based on FEM( finite elements method)analysis of the elastic-reaction method. The FEM analysis is conducted, based on the m-value from back-analysis, to predict the lateral displacement of foundation pits in the stage of excavation, and satisfactory results are abtained.
Keywords: elastic-reaction method; simplex method;m-value; back-analysis; foundation pits