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坑底钢管静压桩地基托换加固技术应用
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摘要
坑底静压桩地基托换技术可以针对具有湿陷性的软弱土层,解决构筑物地基产生沉降变形的问题。结合坑底钢管静压桩地基托换加固技术原理和陕西某煤矿瓦斯泵房风机地基沉降变形及工程地质条件,提出了坑底钢管静压桩托换加固设计方案,介绍了坑底钢管静压桩成桩施工工艺,质量控制要点,对坑底静压桩的桩尖入土深度和压桩力进行了分析。结果表明,坑底钢管静压桩对软弱湿陷性地基加固效果良好,成桩质量控制要重视施工的过程控制,可以很好的解决软弱湿陷性土层产生的地基沉降开裂问题,具有一定的推广使用价值。
Static pressure pile foundation underpinning technology for bottom collapsibility with soft soil layer,solve the problem of structure foundation subsidence deformation.With steel pipe bottom static pressure pile foundation underpinning reinforcement technology principle and shaanxi subgrade settlement deformation of the coal mine gas pump room fan and engineering geological conditions,puts forward the bottom steel pipe pile underpinning reinforcement design scheme,this paper introduces the construction technology for steel pipe pile static pressure pile bottom,and key points of quality control,capacity of static pressure pile bottom of pile tip and the force that press a pile is analyzed.The results show that the steel pipe pile bottom collapsibility of soft foundation reinforcement effect is good,the quality control of pile should attach great importance to the process of construction control,collapsibility can solve the weak soil foundation settlement crack problem well,has certain use value.
引文
[1]谢婉丽,张林洪,阮莉.地基处理中的托换技术及应用[J].昆明理工大学学报,2001,26(2):25-26,79.
    [2]刘海刚.顶承静压桩托换施工技术[J].探矿工程,1998,(6):13-15.
    [3]吕永平,赵卿.静压桩在某氧化铝厂地基加固工程中的应用[J].建筑设计管理,2014,11:94-96.
    [4]湿陷性黄土地区建筑规范.GB50025—2004.
    [5]王建平,姚修文.静压桩托换技术应用中几个问题探讨[J].工业建筑,1999,29(9):62-64.

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