Abstract：Research purposes: The purposes were to make research on the movement laws of water flow and airflow in drainage system for building and put forward the method and measure for solving the problem of inner spilling of drainage system.
Research methods: Based on taking the drainage system with single horizontal branch pipe to drain water, the top of vertical pipe to lead air and the bottom of the pipe going to inspection shaft through horizontal drainage pipe as lab research model, the analysis was made for the pressure change caused by movements of water flow and airflow within building.
Research results: The complicated movements of water flow and airflow in drainage system for building could make change of pressure in the system and the change of pressure was the key factor for causing air inner spilling in drainage system.
Research conclusions: The movements of water flow and airflow in drainage system for building could make change of pressure in the system and change of pressure was the basic cause for damage of water block and harmful gas going into room. It was an effective way for solving the problem of air inner spilling in drainage system for residential building to equip drainage system with special vertical drainage pipe, rationally lay out drainage pipe, use high quality sanitary appliance and piping materials, ensure the construction quality and rationally use drainage system.
刘慧. 建筑排水系统内部的水流运动与室内环境关系的研究[J]. 铁道工程学报, 2006, 23(4): 86-88.
LIU Hui. Research on Relation between Water Flow Movement in Drainage System and Indoor Environment. 铁道工程学报, 2006, 23(4): 86-88.
2006, Vol. 23 
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