超高密度跨孔电阻率法成像在灌注桩埋深探测中的应用

使用常规的小应变、大应变等桩基检测方法对灌注桩埋深进行探测时,存在一定的局限。本次研究首先介绍了超高密度跨孔电阻率法成像(CT)的原理;然后建立了异常体地电模型,分析超高密度跨孔电阻率法成像(CT)响应特征与规律;最后结合实际工程案例,对江苏某建筑施工场地桩基基础进行了检测,利用磁测井法印证了桩长长度。印证结果表明利用跨孔超高密度电法仪探测灌注桩的埋深是可行的。

Application of Ultra-high Density Cross-hole Resistivity Imaging in the Detection of Bored Pile Depth

Conventional pile foundation detection such as small strain and large strain has certain limitations when detecting the buried depth of cast-in-place piles.This article first introduces the principle of ultra-high density trans-hole resistivity imaging(CT),establishes an anomalous body geoelectric model,and analyzes the response characteristics and laws of ultra-high density trans-hole resistivity imaging(CT).Combined with actual engineering cases,the pile foundation of a construction site in Jiangsu is tested,and the length of the pile is verified by the magnetic logging method.The confirmed results show that the cross-hole ultra-high density electrical method is feasible for the buried depth detection of the cast-in-place pile.