摘要
桩体复合地基的设计中,承载力及沉降的计算一直没有较好地考虑桩、土和垫层的相互作用。根据三者的协同作用,推导出大面积群桩中桩、土的荷载传递基本微分方程并给出其解答。该方法提高了计算速度,土性参数均为常规指标,简便易得。该方法还考虑了桩侧阻随侧向土压力的变化以及垫层、土体压缩模量随压力的变化。与有限元计算结果对比表明了该解答的可行性。能够对桩土分担比以及沉降的计算提供帮助,是一种简便实用的方法。
In practice, pile-soil-cushion interaction of composite grounds with piles is not well considered in bearing capacity and settlement estimation. To solve it, based on the relation among pile-soil-cushion, the differential equations of settlements of piles and soil in large-area pile groups together with their solutions are presented. Compared to the results of finite element analysis, these solutions are quite accurate. This method greatly enhances the speed of calculation. The parameters used in this method are all routine soil parameters and are easily obtained through soil test. Also, the stress dependency of both the soil-pile limit friction and the compression modulus is taken in to account in the proposed method. This method is practical and applicable to calculate pile-soil stress ratio and settlement of composite grounds with piles.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2002年第5期546-550,共5页
Rock and Soil Mechanics
基金
北京市自然科学基金项目 8982011
关键词
桩体复合地基
解析法
承载力
沉降
垫层
Mathematical models
Settlement of structures
Soil mechanics
