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盾构掘进前方障碍物的探测是近年来工程中关注的热点,盾构掘进中遇到障碍物,会给盾构机本身、工程甚至施工人员带来危害。基于盾构机的工作方法及周围环境,探地雷达作为一种快速、无损、高效的检测方式,对应用于盾构前方障碍物探测具有理论上的优势。为验证探地雷达应用于盾构前方障碍物探测的可行性以及得出典型障碍物的图像特征,该文采用基于时域有限差分(FDTD)的GPRMAX3D软件,并用Matlab语言编写圆周探测的模拟算法,进行了三维数值模拟,得出障碍物的图像特征,初步判断障碍物在图像上的反映,为今后进一步研究提供依据。
The detection of obstacles in front of shield tunneling is a focus of attention in recent years. Encountering obstacles in shield tunneling will bring harm to shield machine itself, engineering and even construction workers. Based on the working method of the shield machine and the surrounding environment, GPR as a fast, non-destructive and efficient detection method has theoretical advantages for obstacle detection in front of the shield. In order to verify the feasibility of ground penetrating radar applied to obstacle detection in front of shield and obtain the image characteristics of typical obstacles, this paper uses GPRMAX3D software based on finite difference time domain (FDTD), and uses Matlab language to write simulation algorithm of circumference detection , Carried out a three-dimensional numerical simulation, the image characteristics of the obstacle was obtained, the initial reflection of the obstacles in the image, to provide the basis for further research.