修建给水排水温习资料(国外英文资料).docVIP

建筑给水排水复习资料(国外英文资料) Water seal: use a certain amount of hydrostatic pressure to resist pressure changes in the drain and prevent poisonous and harmful gases from entering the room Water damage: (1) siphon loss (2) induced siphon loss (3) water loss. The more water sealed the water, the lower the water seal height. The weaker the ability to resist internal pressure. Loss of water in water seal. 7 drainage riser flow conditions: (1) attached to the wall spiral flow (2) the water film flow (3) the water plug flow If choose the abdominal wall spiral flow state within the system pressure is stable, safe and reliable, and indoor environmental health, single pipe diameter big cost is high; If the water plug is adopted, the size of the pipe is low, but the internal pressure of the system is large, the water seal is easily damaged and the indoor sanitation is polluted. Therefore, when considering both the safety factor and the economic factors, the water membrane flow is used as the basis for the design of drainage pipes. 6 the rain, 1 according to whether there is rain pipes within buildings is divided into inside outside drainage and drainage system, according to the rain in the pipe flow is divided into half a free surface flow of gravity and gravity flow and pressure flow,, The advantages and disadvantages of the drainage ditch: the drainage of the gutter is not put on the roof of the roof, not through the roof. Drainage safe and reliable, not because of poor construction roof leaks or check well water, construction is convenient and saving materials Space is beneficial to the plant to use can also be raped and murdered the factory sewage pipeline buried depth, but because of a certain slope of roof gutter, and a long drainage riser outside the gables, also exists after the roofing mat layer. Increased structural load. The surface of sunny day accumulates dust and dust, rain gutter drain is not smooth, the water drain in cold area can crack the defect of frostbite. Hot w