2016年10月下 施工技术 第45卷第20期 CONSTRUCTION TECHNOLOGY 101 D0I:10.7672/5j52016200101 考虑沉桩时效性的新旧桩变形特性与沉降分析 孙晓晨，朱杰江 (上海大学土木工程系，上海200072) [摘要]软土地区旧桩重新利用时须重新评估其承载能力，计算明确旧桩承载力与新桩承载力之间的内在联系与 差异.采用ABAQUS软件构建新旧桩共同作用的三维弹塑性有限元分析模型，研究了新旧桩共同作用效应及相应 的差异沉降，并对影响新旧桩荷载-沉桩关系的影响因素进行讨论.研究成果表明：随着长径比的增加，新旧桩的 沉降差小幅减小：随着新桩桩径的增加，新旧桩的沉降差大幅减小；随着桩距与直径比值的增加，旧桩沉降大幅 减小. [关键词]桩基；时效性；沉降；变形；数值模拟 [中图分类号]TU473.1 [文献标识码]A[文章编号]1002-8498(2016)20-0101-05 Analysis of Pile Deformation Characters and Settlement of Pile Group Including New and Old Piles Considering Pile Timeliness Sun Xiaochen Zhu Jiejiang Department of Civil Engineering Shanghai University Shanghai 200072 China) Abstract:The bearing capacity of residue pile should be reassessed and then the internal relations and differences between the new pile and the residue one should be analyzed in soft soil area.Load-settlement relationship is expected to be obtained from above research.A three dimensional elastic-plastic finite element model is established by ABAQUS old and new pile effect and the corresponding differential settlement are studied and the load influencing factors of old and new piles are discussed.Research results show that with the increase of length to diameter ratio the old and new pile settlement difference is slightly decreasing.With the increase of new pile diameter pile of old and new different settlement are substantially reduced.With the increase of pile spacing and diameter ratio the old pile settlement deereases sharply. Key words:pile foun...
考虑沉桩时效性的新旧桩变形特性与沉降分析.pdf
