| 软土地基中咬合桩桩身下沉问题的探讨 |
| 投稿时间：2008-05-29 点此下载全文 |
| 引用本文：陈跃,翁奔哲,楼步新.软土地基中咬合桩桩身下沉问题的探讨[J].钻探工程,2008,35(9):41-44.CHEN Yue,WENG Ben-zhe,LOU Bu-xin. Discussion on Subsidence of Secant Pile in Soft Ground[J]. Drilling Engineering, 2008,35(9):41-44. |
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| 中文摘要:软土地基中咬合桩套管内灌注混凝土极容易造成桩体下沉，不但影响钢笼标高，也造成混凝土超方，影响工程质量和经济效益。结合具体的工程实例，对软土地基中咬合桩桩身下沉问题进行了探讨。咬合桩桩身下沉主要由桩端虚土压缩、桩端土压缩沉降和桩身砼凝固沉降组成。在施工前可根据经验系数K1值先预估桩身下沉的理论量，然后在施工中预留相同量土柱高度和相应的混凝土加灌高度，以保证在施工完成后桩身能够满足设计要求。 |
| 中文关键词:软土地基 咬合桩 全套管施工工法 桩身下沉 管内灌注 承载力 沉降量 经验系数 |
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| Discussion on Subsidence of Secant Pile in Soft Ground |
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| Abstract:Pile subsidence often occur for cement grouting in secant pile casing, both construction quality and economic effectiveness is affected. Discussion was made on this problem with field cases, which was mainly caused by compression of residual soil and pile-end soil at the bottom end of the pile, and by cement solidification of pile body. According to K1 value of the empirical coefficient, theoretical amount of subsidence could be predicted, which could be taken account by saving the same amount of pile height in design and grouting the same amount more of cement. |
| keywords:soft ground secant pile fully casing construction pile subsidence grouting in pile bearing capacity subsidence empirical coefficient |
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