咬合灌注桩在基坑围护中的设计与应用

Design and Application of InterlockingCast-in-situ Piles in Base Pit

在基坑工程中 ,支护结构常用钻孔灌注桩 +深层搅拌桩的复合式方案 ,而咬合灌注桩是一种较为新型的围护结构 ,具有成桩质量可靠 ,垂直精度高 ,无需止水帷幕 ,没有泥浆处理及外运等特点 ;全套管桩机施工 ,一序桩(矩形钢筋笼 )、二序桩 (圆形钢筋笼 )相隔咬合布置 ;具有较佳的性价比和良好的环保效益。结合上海新肇嘉浜泵站工程设计实例 ,论述了咬合灌注桩围护结构的性能特点、设计方法和施工要点。

Interlocking cast in situ pile is a new type of perimeter structure with good piling quality, high vertical precision, better performance cost ratio and environmental effects, eliminating water stop curtain, slurry disposal etc. The performance, design method and construction key points of interlocking cast in situ pile of base pit are described together with design examples.