摘要
基于Merchant粘弹性模型 ,建立公路路堤软土地基沉降的二维粘弹性Biot固结有限元计算方法 ;从优化原理出发 ,采用最小二乘法 ,建立根据沉降、孔压以及侧向变形等实际观测信息进行参数反演的合理目标函数形式 ;采用Simplex直接优化算法 (单纯形法 )实现参数的反演计算 ,从而提高公路路堤软土地基沉降预测的准确性。实例分析表明 。
In this paper, the two-dimensional formulas of viscous-elastic Biot's consolidation FEM based on Merchant's model are presented to calculate settlement of saturated soft clay ground in highway's embankment project. Parameters in formulas may reasonably be determined by direct optimal method (such as Simplex) so that it minimizes the sum of squares of differences between calculated and measured quantities (objective function). The future settlement can be more accurately predicted by using the back-analytical parameters.
出处
《公路交通科技》
EI
CAS
CSCD
北大核心
2001年第5期11-14,共4页
Journal of Highway and Transportation Research and Development
关键词
软土地基
沉降
反演
预测
Soft clay ground
Settlement
Back-analysis
Prediction
