双向增强复合地基沉降计算方法研究  

Settlement calculation of two-directional reinforced composite foundation

作　　者：赵明华[1] 张玲[1] 赵衡[1] 

机构地区：[1]湖南大学岩土工程研究所,长沙410082

出　　处：《岩土力学》2011年第9期2741-2746,共6页Rock and Soil Mechanics

基　　金：国家863计划资助项目(No.2006AA11Z104)

摘　　要：将双向增强复合地基中的水平向加筋垫层视为具有一定刚度的地基梁,竖向桩体和桩间土体简化为一系列刚度不同的弹簧,考虑水平加筋垫层上下界面摩阻力的影响,基于Winkler弹性地基梁理论推导出水平加筋体的挠曲变形微分方程,并给出其幂级数半解析解,从而得到了双向增强复合地基在对称荷载作用下的沉降计算方法。通过与常规弹性地基梁法的比较验证了该方法的正确性。该方法可考虑水平加筋体筋材拉力对双向增强复合地基沉降的影响,研究结果表明,水平加筋体的设置有利于减少复合地基的沉降量。The horizontal geosynthetic reinforced mattress located on the top of vertical piles is idealized as a foundation beam,while the vertical piles and the surrounding soil are idealized as an elastic spring system.Based on the theory of the Winkler elastic foundation beam and with consideration of the interactional resistances on the interfaces up and down of the reinforced mattress,a deformation equation of the reinforced mattress is established;and its power series semi-analytical solutions are proposed.The presented method can consider the effect of the tensional force of the horizontal reinforcement on the settlement of the composite foundation.The study results indicate that the installation of the geosynthetic reinforcement in the mattress has a contribution to control foundation settlements.

关 键 词：双向增强复合地基 沉降 弹性地基梁 幂级数法 

分 类 号：TU433[建筑科学—岩土工程]