住宅小区室外管网工程是住宅小区的配套工程。小区管网工程的特点可归纳为“三多两紧”:一是管线种类多。现代住宅小区普遍都有排水管道(雨水排水管、污水排水管)、供水管道(自来水管、中水管、纯净水管)、热力管道、煤气管道、通讯及智能管网(电话、有线电视、宽带网等)、电力管线等;二是施工单位多。各专业管线分属各专业部门施工,尤其是自来水、煤气、电力等专业管线的施工,目前仍有一定的垄断性;三是交叉多。小区管线纵横交叉,造成专业施工 Residential area outdoor pipe network project is a residential community supporting projects. Community network project features can be summarized as “more than two tight ”: First, many types of pipelines. Modern residential areas generally have drainage pipes (rainwater drains, sewer pipes), water supply pipes (water pipes, plumbing, pure water pipes), heat pipes, gas pipes, telecommunications and smart pipe network (telephone, cable television, broadband network Etc.), power lines, etc .; Second, many construction units. Various professional pipelines belong to the construction of various professional departments, especially construction of professional pipelines such as running water, gas and electric power. There are still some monopolies at present; thirdly, there are many intersections. Crossover district lines, resulting in professional construction