框筒结构体系下变桩长CFG桩复合地基基底反力及变形特性试验研究
发布时间：2018-11-07 18:41
【摘要】：通过框筒结构体系下变桩长CFG桩复合地基模型试验,实测得到了其基底反力及变形特征并进行了分析,得出了以下结论:(1)采用长桩强化核心筒区、短桩相对弱化外框架柱区,核心筒与外框柱中间区域采用中等长度桩,在使用荷载水平下,基础中轴线纵向挠曲为0.25‰,基础对角线纵向挠曲为0.21‰。(2)在使用荷载水平下,核心筒区桩顶应力明显高于外框架柱区,核心筒区桩顶应力相对均匀,角桩最大,边中桩次之,中心桩最小;核心筒区桩间土应力与外框架柱区相差不大,整体上桩间土应力分布较为均匀,3个分区的桩间土承载力均可充分发挥。(3)在使用荷载水平下,核心筒区基底反力最高,分布较为均匀,呈线性分布;核心筒区至外框柱区基底反力逐步衰减;外框柱区域基底反力最低,分布较为均匀,基本呈线性分布;基底反力总体上呈盆形分布,基底反力分布与复合模量相关性明显,大致成线性关系。
[Abstract]:Through the model test of CFG pile composite foundation with variable pile length under frame-tube structure system, the reaction and deformation characteristics of the foundation are obtained and analyzed. The following conclusions are obtained: (1) the core tube area is strengthened by long pile. The short pile is relatively weak in the outer frame column area, the medium length pile is used in the middle area of the core tube and the outer frame column, and the longitudinal deflection of the central axis of the foundation is 0.25 鈥，
本文编号：2317251
[Abstract]:Through the model test of CFG pile composite foundation with variable pile length under frame-tube structure system, the reaction and deformation characteristics of the foundation are obtained and analyzed. The following conclusions are obtained: (1) the core tube area is strengthened by long pile. The short pile is relatively weak in the outer frame column area, the medium length pile is used in the middle area of the core tube and the outer frame column, and the longitudinal deflection of the central axis of the foundation is 0.25 鈥，
本文编号：2317251
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