水利水电科技进展2016，Vol.36Issue(3)：26-30,35,6.DOI:10.3880/j.issn.1006-7647.2016.03.006
均布荷载下软土地基一维非线性固结的有限差分法
Finite difference method for one-dimensional nonlinear consolidation of soft ground under uniform loads
摘要
Abstract
In the calculation of one-dimensional soft clay ground consolidation in deep soil, initial stress and additional effective stress distributions in soil greatly influence the degree of consolidation of ground. With regard to this problem, one-dimensional nonlinear consolidation governing equations of soft ground under uniform loads are derived and solved with the finite difference method, based on the assumptions that the initial stress in soil varies with the ground depth, and the additional effective stress caused by external loads changes with both ground depth and consolidation time, as well as the hyperbolic model of the soil stress-strain relationship. Formulas for the degree of consolidation and settlement of ground are presented. A case study shows that the degree of consolidation of ground calculated with the finite difference method agrees with the traditional analytical solution, and the computational efficiency of the finite difference method can be effectively improved when the segmental calculation method is used throughout the consolidation process. The results of another example show that the settlement of ground calculated with the finite difference method agrees with the in-situ data. The suggested method can greatly simplify the consolidation calculation and is of high applicative value in engineering.关键词
软黏土/一维固结/非线性/有限差分法/均布荷载/双曲线模型Key words
soft clay/one-dimensional consolidation/nonlinearity/finite difference method/uniform load/hyperbolic model分类
建筑与水利引用本文复制引用
赵明华,贺成斌,马缤辉,陈秋南,雷勇..均布荷载下软土地基一维非线性固结的有限差分法[J].水利水电科技进展,2016,36(3):26-30,35,6.基金项目
国家自然科学基金(51308208,41372303) （51308208,41372303）
湖南省自然科学基金(2015JJ3069) （2015JJ3069）
