通信管道工程与市政基础设施建设天津市市政工程设计研究院李树随着我国人民生活的逐步改善及社会各方面需求的不断增加，城市的基础设施也发生了很大的变化。近十年以来，国家和地方政府对基础设施建设的投入逐年提高，城市道路、桥梁（含立交桥）、给排水、煤气、热力、... Communications Pipeline Engineering and Municipal Infrastructure Construction Tianjin Municipal Engineering Design and Research Institute Li Shu Along with the gradual improvement of the people’s lives in our country and the increasing demand from all walks of life, the city’s infrastructure has also undergone great changes. In the past ten years, the investment of national and local governments in infrastructure construction has been increasing year by year. Urban roads, bridges (including overpasses), water supply and drainage, gas, heat,...