不良地质条件下建筑物桩基础检测方法及结果分析  

Detection Method and Result Analysis of Building Pile Foundation under Unfavorable Geological Condition

作　　者：李科 LI Ke(Shenzhen Investigation and Research Institute Co.,Ltd.,Shenzhen 518026,Guangdong,China)

机构地区：[1]深圳市勘察研究院有限公司,广东深圳518026

出　　处：《工程技术研究》2024年第18期15-17,共3页Engineering and Technological Research

摘　　要：文章以实际工程为依托,详细介绍了包括静载试验法、应变反射波法、声波透射法与钻芯法共计四种桩基检测方法的原理、判别依据及优劣,并通过工程实例对各检测方法进行实际应用,结果表明:静载试验下,典型桩的Q-S曲线在整个试验检测阶段中斜率较为平缓,未出现明显突增;在S-lgt曲线中,桩体变形随荷载的增大而增大,且同一荷载级数下,桩体变形随时间的增长而缓慢增大;低应变反射波检测下部分桩体实测曲线平均波速为3 833.5 m/s,整体波形较为平稳,没有突变,表明桩身并未出现明显的缺陷,桩体为完整或基本完整桩。Based on actual engineering,this paper introduces in detail the principles,discrimination basis,advantages and disadvantages of four pile foundation detection methods,including static load testing method,strain refl ection method,crosshole sonic logging and drilled core method,and practically applies each detection method through engineering examples.The results show that under the static load testing,the slope of the Q-S curve of the typical piles is relatively flat throughout the test and detection stage,and there is no obvious sudden increase;in the S-lgt curve,the deformation of pile body increases with the increase of load,and the deformation of pile body increases slowly with the increase of time under the same load level;the average wave speed of measured curve of some piles under low strain refl ection detection is 3833.5 m/s,and the overall waveform is relatively smooth without sudden change, which indicates that there is no obviousdefect in the pile body, and the piles are intact or basicallyintact.

关 键 词：桩基础检测 静载试验法 应变反射波法 声波透射法 钻芯法 

分 类 号：TU473[建筑科学—结构工程]