钻孔灌注桩钢筋笼长度的无损检测方法

THE NON DESTRUCTIVE INSPECTION OF THE LENGTH OF REINFORCEMENT CAGE FOR THE BOREHOLE INJECTION PILE

上海地区软土地层中施工的工程地基基础，大量采用钻孔灌注桩。每根灌注桩的钢筋笼有几节焊接而成。钻孔灌注桩施工结束后，如何检测其钢筋笼长度和焊接质量是一个难度很大的问题，本文介绍采用高精度基础桩现场诊断仪和地质雷达仪检测钻孔灌注桩钢筋笼长度的方法及效果。

In Shanghai area, borehole injection piles are used in large quantities for construction foundation in soft soil strata. The reinforcement cage for each injection pile consists of several parts linked together through welding. After the completion of the borehole injection pile construction, the inspection of the length of the reinforcement cage and the examination of welding quality constitute a very difficult problem. This paper recounts the technology and effects of applying high precision foundation pile diagnostic device and geological radar to the inspection of the length of reinforcement cage for the borehole injection pile.