深基坑咬合桩施工中常见问题分析及对策

Analysis and countermeasures of common problems in deep foundation pit interlocking pile construction

为分析高地下水位条件下深基坑咬合桩施工可能存在的困难并解决施工中出现的问题,以荆州煤炭铁水联运储配基地项目一翻车机房基坑工程为例,通过试桩、地层条件分析、规范公式计算等手段进行研究,提出了针对导墙不均匀沉降、初期施工缓慢、钢筋笼上浮等问题的解决措施。通过对该工程咬合桩施工中有关问题的分析,总结出在高地下水位、软土地基以及砂层及卵石层中进行咬合桩施工的行之有效的一些工程经验,对类似条件下的工程咬合桩施工有着一定的借鉴意义。

In order to analyze the difficulties in the construction of deep foundation pit interlocking pile under high groundwater level and solve the problems occurred in the construction process,taking the foundation pit engineering of Jingzhou shipping-railway integrated transport base as an example,some measures were put out to solve the problems of uneven settlement of guide wall,initial unefficiency construction and floating of steel cage by the means of pile test,geological condition analysis and standard formula calculation.According to the analysis of related problems in the construction of interlocking pile,some effective engineering experiences in the construction of interlocking pile under complex geological conditions were summarized,such as soft soil foundation in high groundwater level,sand layer and pebble layer,which has certain reference significance for the construction of interlocking pile under similar conditions.