建筑给排水设计体会（Experience in design of building water supply and drainage）.doc

建筑给排水设计体会（Experience in design of building water supply and drainage） Experience in design of building water supply and drainage Brief introduction: the author has used the local rain waste confluence system, but in recent years, with the development of economy, improving the peoples living standards, housing area increased, the layer number on the rise, often appear lower household drain steaming and spilled water, especially in the drain plug or half block under the condition of water Jinshan, make the room of the high-grade decoration and storage items of flooding, causing economic losses, many disputes occur, the consequences are serious. Key words: building water supply and drainage design experience First, design specifications 1. Calculation of water supply Code for design of building water supply and drainage, section 2.6.4, residential building water supply design flow formula: Qg= 0.2A +KNg In the formula, a and K are the numerical values determined by the use of buildings, and Ng is the total number of water supplies used for sanitary appliances in pipe sections. A 100m2 single guard house: Kitchen Faucet equivalent 1, washing machine faucet equivalent 1.2, wash basin equivalent 1, shit 0.5 equivalent, bath tub equivalent 1.5. A total of 5.2 equivalent. Design and calculation of the flow of water by 2 types of housing: qg=0.2 * 1.02 * * 5.2=0.49l/s 0.0045. The same set of 100m2 double house, the equivalent of a total of 8.2, water flow rate is 0.61l/s. The two is related to 24.4%, the former uses DN20 inlet pipe (V=1.5m/s), the latter uses DN25 inlet pipe (V=1.15m/s), the same area, the same number of users, two kinds of results. In the specification modification, we hope to consider this situation. Building water supply and drainage design specification provisions of article 2.6.4 when self closing flushing valve life water flow rate formula four, the four in the standard text 2.6.4 formula and annotation were not reflected, easy to cause the negligence