This work aims to analysis and detects the reasons of the collapse of a road in northern Morocco using simulation based on the Finite-Difference Time-Domain method (FDTD) and a real survey by ground-penetrating radar (GPR) method. In the simulation, we test several targets buried in dry soil at the same depth. Depending on the simulation results GPR survey is done in two zones. The first zone shows multiple strong reflections, it indicates the presence of cavities. In the second zone, the profiles show the presence of the cavities and fragile lands saturated. Based on the results of the analysis and investigation experimental results, it is found that the causes of collapses on the road are due to the presence of the cavities and fragile lands saturated with water. This contribution can be effective and successful in studying areas when establishing infrastructure projects to avoid any risks that in the future.

这项工作旨在利用基于有限差分时域法 (FDTD) 的模拟和探地雷达 (GPR) 方法的实际调查，分析和检测摩洛哥北部道路坍塌的原因。在模拟中，我们测试了埋在干燥土壤中相同深度的几个目标。根据模拟结果，探地雷达勘测在两个区域进行。第一个区域显示多个强反射，表明存在空腔。在第二个区域，剖面图显示存在空洞和饱和的脆弱土地。根据分析结果和调查实验结果，发现道路坍塌的原因是由于存在空洞和被水饱和的脆弱土地。