水利水电科技进展2012，Vol.32Issue(1)：83-86,4.DOI:10.3880/j.issn.1006-7647.2012.01.019
加筋土高边坡的有限元分析
FEM analysisof high reinforced soil slopes
摘要
Abstract
A geogrid-reinforced soil slope is calculated and analyzed by use of the finite element method (FEM). In the calculation, the deformation modulus and Poisson' s ratio of the backfill as well as the deformation modulus of the geogrid are altered. The results show that the vertical distribution of the maximum axial force of the geogrid in each step of the slope is approximately in a shape of triangle or trapezoid, while the overall distribution is in a shape of zigzag. The abrupt change of the axial force occurs at the adjacent position of two steps of the slope. The variation of the deformation modulus of the backfill hag greater influence on .the vertical displacement of the slope than on the horizontal displacement. Much lower deformation modulus of the back fill may induce the increase of the slope displacement and the axial force of the geogrid, and it haslittle influence on then-distribution patterns. The variation of the deformation modulus of the geogrid mainly affects the magnitude of its axial force. The decrease of the deformation modulus leads to the decrease of the axial force in the geogrid, and vice versa. Therefore, appropriate reduction of the deformation modulus of the geogrid in practice is helpful in reducing the forces acting on the geogrid and its failure risks.关键词
加筋土边坡/土工合成材料/土工格栅/变形模量/有限单元法Key words
reinforced soil slope/ geosynthetics/ geogrid/ deformation modulus/ FEM分类
建筑与水利引用本文复制引用
介玉新,秦晓艳,金鑫,徐文杰,王恩志..加筋土高边坡的有限元分析[J].水利水电科技进展,2012,32(1):83-86,4.基金项目
国家自然科学基金(50979047) （50979047）
国家重点基础研究发展计划(973计划)(2010CB732103) （973计划）
水利部公益性行业科研专项(201001027) （201001027）
