摘要
通常情况下,桩、土支承刚度差异显著,相同荷载水平下两者存在变形差,因此要实现桩土共同作用,必须要消除桩土的变形差,保证桩土的变形协调。在分析桩土共同作用机理的基础上,对现有桩土共同作用的实现方法和发展趋势进行归纳与总结并将其分为三大类:补偿位移法、刚度调整法以及预加位移法。其中,补偿位移法又包括摩擦桩复合桩基与刚性桩复合地基,刚度调整法主要为笔者提出的设置调节装置的端承桩复合桩基,预加位移法主要指桩顶设置柔性材料以及桩顶预留净空复合桩基。对上述每类所包含的具体方法进行了介绍,并对各自的适用条件、优缺点进行了对比与分析。
Significant differences on supporting stiffness usually exist between piles and soils,and differential settlement is formed at the same level of loads.In order to realize pile-soil interaction,the differential settlement must be eliminated to ensure deformation compatibility of piles and soils.Based on analyzing mechanism of pile-soil interaction,existing methods and future development trend were summarized and divided into three classes： method of deformation compensation,method of rigid adjusting and method of preadditive deformation.The method of deformation compensation included friction pile composite foundation and rigid pile composite foundation.The method of rigid adjusting included end bearing pile composite foundation.The method of preadditive deformation included composite pile foundation with gap or flexible materials at pile head.These methods were introduced,and the applicable conditions,advantages and disadvantages of above methods were compared and analyzed.
出处
《建筑结构》
CSCD
北大核心
2012年第3期140-143,共4页
Building Structure
基金
国家自然科学青年基金(51008159)
江苏省高校自然科学基础研究项目(08KJB560002)
住房与城乡建设部研究开发项目(2010-K3-4)
关键词
桩土共同作用
支承刚度
差异沉降
复合桩基
pile-soil interaction
bearing stiffness
differential settlement
composite pile foundation
