Detection Method and Result Analysis of Building Pile Foundation under Unfavorable Geological Condition
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.
pile foundation detectionstatic load testing methodstrain reflection methodcrosshole sonic loggingdrilled core method
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