施工技术 2012年1月上 50 CONSTRUCTION TECHNOLOGY 第41卷第356期 软土地区冲击碾压对PHC桩桩身质量的影响 陈国栋，羌鑫梁2，严后军3，李伟1 (1.上海现代建筑设计集团申元岩土工程有限公司，上海200040； 2.上海勘测设计研究院，上海200434；3.江苏省淮球新河管理处，江苏淮安223005) [摘要]冲击碾压在提高地基强度、稳定性和均匀性、减少工后沉降、防止不均匀沉陷等方面都远远优于静碾压和 振动碾压.由于冲击碱压具有较高的冲击能，会引起一定范围内土体的振动，从而可能造成距施工现场较近的建 (构)筑物受损.结合苏州软土地区冲击碾压项目，对邻近PHC柱的冲击碾压施工进行了试验研究.试验结果表 明，冲击展压施工的影响深度≤2m;土体深层水平位移和PHC桩桩顶水平位移主要在冲击碾压施工20遍内产生； PHC桩低应变动测的结果显示25kJ冲击碾压对桩顶埋深为1m以上的PHC桩桩身质量并无破坏影响. [关键词]基础工程；桩基础；PHC桩；软土；冲击碾压；低应变动测 [中图分类号]TU471.8 [文献标识码]A[文章编号]1002-8498(2012)01-0050-03 The Influence of Impact Roller Compaction to PHC Pile in Soft Soil Area Chen Guodong' Qiang Xinliang2 Yan Houjun' Li Wei' (Shen Yuan Geotechnical Co.Ltd.Shanghai Xian Dai Architectural Design(Group)Co.Ltd. Shanghai 200040 China; 2.Shanghai Investigation Design Research Institute Shanghai 200434 China; 3.Jiangsu Huaishu New River Management Office Huaian Jiangsu 223005 China) Abstract:Impact roller paction is better than static roller paction and vibrate roller paction such as improving foundation intensity stability uniform reducing post-construction settlement and preventing uniform settlement.The high energy of impact roller paction will cause vibration to soil in a certain scope thus may cause damage to buildings nearby.Author studies the influence of impact roller paction to PHC pile in soft soil area in Suzhou.Research shows that the influence depth of impact roller paction is not less than 2 meters displacement of deep soil horizontal and PHC pile to...
软土地区冲击碾压对PHC桩桩身质量的影响.pdf
