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目前北京市大部分开槽施工的排水管道仍然沿用传统的施工方法:用平口混凝土或钢筋混凝土排水管,在槽底浇筑混凝土条形管基。管与管之间采用钢丝网砂浆抹带方法做刚性连接(图1)。虽然管底条形混凝土基础可以起到提高排水管的承载能力、保证重力流的坡度等作用,但是混凝土基础的浇筑和养生会增加开槽的土方量并延长晾槽的时间,这不仅增加了降水费用和技术措施费用,而且也增加了湿混凝土作业带来的环境污
At present, most of the drainage pipes used in the construction of the trenches in Beijing still follow the traditional construction method: using concrete with a flat mouth or reinforced concrete drainage pipes, the concrete strip-shaped pipe base is placed at the bottom of the tank. Between the pipe and the pipe, a steel wire mesh wiper method is used to make a rigid connection (Figure 1). Although the tube-bottomed concrete foundation can play a role in improving the carrying capacity of the drainage pipe and ensuring the slope of the gravity flow, the pouring and maintaining of the concrete foundation will increase the amount of earth to be grooved and extend the time of the drying tank. This not only increases the Precipitation costs and technical measures, but also increased environmental pollution caused by wet concrete operations