摘要
针对土层中存在上下两层或多层可供利用的桩端持力层,且建筑物对沉降要求较高的情况,基于减沉桩原理,根据长桩控制变形、短桩提供承载力的基本思路提出长短桩组合桩基础设计思想。采用简化模型对全短桩、全长桩及长短桩组合桩基础在竖向荷载作用下的变形特性进行三维有限元分析。分析结果表明长短桩组合桩基础不仅可以大量减少长桩用量,而且可有效地控制基础整体沉降和差异沉降,显示其良好的应用前景。
Considering the case when there exist two bearing soil strata and low settlement of foundation is desired, the design philosophy for composite long-short pile foundations is presented. The long pile is mainly to control the settlement and the short pile mainly to provide bearing capacity. The performances of a short pile foundation, a long pile foundation and a composite long-short pile foundation under vertical load have been calculated by using the finite element method, and the results indicates that the composite long-short pile foundation demands fewer long piles and can effectively control the average and differential settlements.
出处
《土木工程学报》
EI
CSCD
北大核心
2005年第12期103-108,共6页
China Civil Engineering Journal
关键词
长短桩
设计思想
有限元
long-short pile
design philosophy
finite element method
