旁孔透射波法检测桩长的理论与实践

Theory and practice of pile length inspection with parallel seismic method

在旧建(构)筑物改造、盾构施工甚至工程纠纷等诸多情况下要准确获知桩的长度信息,现有技术手段存在诸多不足,仍是一个尚待解决的难题。旁孔透射波法在欧美等国家得到了广泛的应用,相应的检测仪器以及配套软件等已步入商业化阶段。对于旁孔透射波法,国内亦有少量文献及工程实例的报道,但是内容略显粗浅,对于指导工程实践仍不够充分。本文在基桩检测中常用反射波法的基础上,详细介绍了旁孔透射波法的基本原理、现场检测及信号分析等内容,以期能为相关工程技术人员提供参考,推动该项技术在国内的发展。

In the old city reconstruction,the shield tunneling,the construction disputes and many other cases,the accurate determination of pile length is still difficult owing to the shortages existed in current inspection technique.The parallel seismic method has been widely applied in Europe,America and other countries,and the corresponding inspection equipment and the matching software have stepped into commercialization stage.However,the parallel seismic method is mentioned in minor literatures published at home,and the relevant contents are slightly rough.Based on the common-used reflected wave method,the fundamental principle,field inspection and signal analysis of the parallel seismic method are described in detail.It is hoped that it could give the useful reference to technical personnel and promote the profound application of the method in China.