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
李科1
作者信息
- 1. 深圳市勘察研究院有限公司,广东 深圳 518026
- 折叠
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.
Abstract
Based on actual engineering,this paper intro-duces in detail the principles,discrimination basis,advan-tages and disadvantages of four pile foundation detection methods,including static load testing method,strain re-flection method,crosshole sonic logging and drilled core method,and practically applies each detection method through engineering examples.The results show that un-der 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 reflection detection is 3 833.5 m/s,and the overall waveform is relatively smooth without sudden change,which indicates that there is no obvious defect in the pile body,and the piles are intact or basically intact.
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Key words
pile foundation detection/static load testing method/strain reflection method/crosshole sonic logging/drilled core method引用本文复制引用
出版年
2024
NETL
NSTL
万方数据