花岗片麻岩地质条件下灌注桩质量检测及分析

Bored Piles Quality Testing and Analysing in Granitic Gneiss Geological Conditions

通过工程实例说明如何采用多种方法结合检测顺德地区花岗片麻岩地质条件下灌注桩的常见质量问题,一是采用低应变法发现基桩硬持力层存在下伏软弱夹层的质量问题(以前未见报道),并用钻芯法验证,静载试验也证明承载力不满足设计要求;二是采用钻芯法和静载试验推断遇水软化现象。文中还通过分析对该地质条件下基桩施工及检测方法的选择提出了建议。

Based on the analysis of examples of bored piles quality testing in granitic gneiss geological conditions,this paper conclude as follows,low strain dynamic testing of piles can judge the quality of bored pile body in granitic gneiss geological conditions,weak intercalation and bearing stratum is softened in water by comparison of the roch characteristics will affect the quality of piles,this paper also provide recommendations on pile construction and quality security inspection.