2016年4月上 施工技术 第45卷第7期 CONSTRUCTION TECHNOLOGY 37 D0I:10.7672/8js2016070037 锚杆静压桩不卸载情况下桩孔内锚固封桩技术探索 李小玥，翁功伟 (中天建设集团有限公司，浙江杭州310020) [摘要]针对传统错杆静压桩封桩的不足之处，采用不卸载孔内错固封桩技术，即在桩顶施加荷载情况下封桩，待 封桩混凝土达到一定强度后撤去施加荷载，此时桩与基础能够立即发挥作用，从而有效减少建筑物附加沉降.通 过多个工程实践证明，改进的施工工艺能有效减少回弹效应及建筑物附加沉降，封桩后质量可靠. [关键词]桩；错杆静压桩；不卸载封桩：错固；施工工艺 [中图分类号]TU745.3 [文献标识码]A [文章编号]1002-8498(2016)07-0037-03 Exploration on the Technology of Sealing Pile Without Unloading in the Pile Hole of Anchor Jacked Pile Li Xiaoyue Weng Gongwei Zhongtian Construction Group Co.Lid.Hangzhou Zhejiang 310020 China) Abstract:According to the shortage of tradition sealing pile of anchor jacked pile the technology of sealing pile without unloading was adopted.Applied load seal at the top of the pile removed the applied load when the sealed concrete reached the intensity.Then the pile and foundation can play their roles immediately so as to effectively reduce building additional settlement.Through many engineering practiees the improved construction technology ean effectively reduce the rebound effect and the additional settlement of buildings the quality of the pile is reliable. Key words:piles;anchor jacked pile;sealing pile without unloading;anchor;construction 0引言 通过锚固架错固在桩孔内的改进工艺.改进的不 锚杆静压桩因其施工方便且能很快提供较高 卸载孔内铺固封桩工艺在宁波经过多个工程实践， 的承载力被广泛应用于建筑物地基加固、纠偏与基工艺施工可靠性强，取得了良好的经济效益和工程 础托换等工程中.由于施工经验的缺乏及施工单 效果. 位片面追求工期利益等因素的影响，一般在压桩结 1卸载封桩对建筑物沉降的影响 束后会卸下千斤顶、移除桩架，以便施工其余桩. 锚杆静压桩处理地基后建筑物常产生较大沉 然而，在错杆静压桩卸载的情况下封桩，桩体的回 降，与压桩卸载后桩的回弹、桩在封桩后未及时发 弹效应很容易导致建筑物产生附加沉降. 挥作用...
锚杆静压桩不卸载情况下桩孔内锚固封桩技术探索.pdf
