① 　随着全球城市化进程加快 ,各国政府面对人口、资源和环境的巨大压力 ,为确保国民经济的可持续发展 ,加大城市地下空间开发利用的力度 ,将城市相关的基础设施建造在地下已成为未来城镇建设的重要发展方向之一 ,而其中首当其冲的就是城市各类管网的地下化和城市交通的立体化 ① With the accelerating process of urbanization in the world, governments of all countries face great pressure from population, resources and the environment. To ensure the sustainable development of the national economy and to increase the exploitation and utilization of urban underground space, the relevant infrastructure of the city is built underground Has become one of the important development directions for town construction in the future, and the first one is the undergroundization of all kinds of urban pipe networks and the three-dimensional urban traffic