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双向增强体复合地基桩土应力比分析
引用本文:郑俊杰,陈保国,王仙芝.双向增强体复合地基桩土应力比分析[J].华中科技大学学报(自然科学版),2007,35(7):110-113.
作者姓名:郑俊杰  陈保国  王仙芝
作者单位:华中科技大学,土木工程与力学学院,湖北,武汉,430074
摘    要:分析了双向增强体复合地基中筋材-桩-桩间土协同作用机理,利用圆弧线模拟筋材的挠曲变形,假设桩间土为理想弹塑性体,通过对筋材、桩体和桩间土进行力学分析,推导出了双向增强体复合地基桩土应力比的一种解析解和筋材挠曲变形的计算公式.结合算例和现场试验结果分析了桩土应力比和筋材挠曲变形的影响因素及其变化规律,算例分析结果说明该计算方法是合理的,可为工程实际提供理论参考.

关 键 词:双向增强体  加筋土单元  挠曲变形  桩土应力比  路堤荷载  增强体  复合地基  桩土应力比  算例分析  composite  foundations  reinforcement  理论  工程  计算方法  试验结果分析  变化规律  影响因素  结合  计算公式  解析解  力学分析  桩体  塑性体  假设  挠曲变形
文章编号:1671-4512(2007)07-0110-04
修稿时间:2006-04-12

Pile-soil stress ratio of two-directed reinforcement composite foundations
Zheng Junjie,Chen Baoguo,Sari W. Abusharar,Wang Xianzhi.Pile-soil stress ratio of two-directed reinforcement composite foundations[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2007,35(7):110-113.
Authors:Zheng Junjie  Chen Baoguo  Sari W Abusharar  Wang Xianzhi
Institution:College of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China
Abstract:Studied was the behavior of two-directed reinforcement(TDR) composite foundation which is an interactive system consisting of the geosynthetics(geotextile,geomembrane,geonet,geogrid etc),pile and soil.The formulas for calculating the geosynthetic deformation and the pile-soil stress ratio are proposed based on the arc-curve model,the equilibrium force of geosynthetic-pile-soil and hypothesis of elasto-plastic model of soil around piles. The factors affect geosynthetic deformation and pile-soil stress ratio was analyzed systemically,based on several numerical examples and field testing result.Results of show that the formulas proposed are feasible and reasonable,giving reference to designing TDR composite foundation.
Keywords:two-directed reinforcement  geosynthetic element  geosynthetic deformation  pile-soil stress ratio  embankment loads
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