利用地质雷达方法进行重庆宝顶山-北山快速通道工程隧道灌浆检测

传统的地质雷达检测方法主要用于衬砌空洞及衬砌钢筋位置检测，对隧道灌浆状态及深度无法准确判断，不能适用于隧道衬砌后灌浆质量及深度的检测，为此，研究对传统地质雷达检测方法进行改进，通过灌浆孔内增设信号反射装置，在不影响灌浆施工的情况下，增强了雷达反射波，进而识别灌浆状态及深度，达到了对灌浆质量检测的目的。通过在宝棠隧道及龙岗隧道中的应用实例，检测结果证实了改进后的地质雷达探测方法可以对隧道衬砌及围岩灌浆状态进行判断，从而及时采取相应措施进行返工处理。

Using Ground Penetrating Radar Method for Grouting Inspection of the Baodingshan-Beishan Expressway Tunnel in Chongqing

The traditional geological radar detection method is mainly used for detecting the position of lining cavities and lining steel bars.This method cannot accurately determine the status and depth of tunnel grouting, and is not suitable for detecting the quality and depth of grouting after tunnel lining.For this purpose, research was improved the traditional geological radar detection method by adding a signal reflection device in the grouting hole, which enhanced the radar reflection wave without affecting the grouting construction, thereby identifying the grouting status and depth, and achieving the purpose of grouting quality detection.It is verified through application examples in Baotang Tunnel and Longgang Tunnel that the improved geological radar detection method can judge the status of tunnel lining and surrounding rock grouting, and take corresponding measures for rework in a timely manner.