长螺旋取土配合静力压桩在桩基施工中的应用研究

Application and Quality Control of Long Screw Auger Taking Clay and Static Pressuring Pile Construction Technology

工程所在场地处于滇池盆地北部边缘地段,土体含水丰富,地层下第三层含有圆砾层,且粒径较大,周边有村民住宅。采用直径为380 mm的长螺旋取土配合静力压桩的施工方法,解决了在复杂特殊的地质条件下,静压预应力管桩施工有效桩长和单桩承载力不够的难题。以此工程为例,详细介绍了长螺旋取土配合静力压桩的施工工艺在具体工程中的应用,分析了施工中常见的问题以及如何处理这些问题以保证工程质量。

This project is positioned on the northern edge of Tien Lake Basin,which is the soil rich water-bearing,the third layer containing strata round gravel layer,and particle size is larger,periphery have villagers residence.The 380 mm-diameter long screw auger taking clay and static pressuring pile construction technology is finally confirmed for the most appropriate method,which solved the problem that static pressuring pile construction effective pile lengths and single pile bearing capacity is not enough in complex special geological condition.Based on which the following aspects are investigated,the practical application of long screw auger taking clay and static pressuring pile construction technology is introduced in detail,the common problems is analyzed and disposed for the project quality.