强风化嵌岩钻孔灌注桩终孔判定的探讨

Stoppage indentification of slurry drilled pile embeded in highly weathered rock

长大直径冲钻孔强风化碳岩灌注桩是福州等沿海地区大中型桥梁和高层建筑的理想桩型，但由于沿海冲积、海积地质复杂多变，和工程钻探有限，给施工和临理带来很大麻烦，且易留下工程隐患。本文通过作者工程实践，提出该桩型终孔判定的要素和方法，并介绍了冲钻孔中岩土鉴别，能够较好地解决上述问题。

Large long slurry drilled pile embeded in highly weathered rock is sultable for highrise and bridge in coastal area.such as Fuzhou, However, It's very troublesome to engineering construction and supervision, because of the complexity and changefulness of siratigraphical succession in coatal area, and the limitation of geological drilling, in the same time, the hidden danger is reserved also, This is a grest problem which eager to be soluted. Based on engineering pratice by nuthor, the factors and methods of stoppage identification are given, and the judgement of geolreic stratas from drilling is presented in this paper, which work out a solution for the above problem.