【 Weak current College 】 large and multiple layers of underground parking of drainage design---Power By 【 China power house network 】

Abstract: in a large multi storey underground garage drainage design, peripherals Hill and waterproof ditches, built-in floor drain and set well, and then choose the corresponding power of submersible pumps, drainage in control, "Royal" water in the garage. Keywords: underground garage drainage design set water network submersible pumps in recent years, due to the residential buildings of gentrification and the increase in private car ownership, in the underground construction of one or more layers of underground parking, almost all flats compete to follow, and there are signs of growing. However, because this part of the building that is underground parking of the ground elevation is generally lower than the surface elevation of outdoor water cannot flow into the municipal sewer network, especially storm season, and if improper drainage design, often causing rain dawdles, affect the safety and use of the garage.　　To this end, it is necessary at design time to attach great importance. 1, underground garage for waterproofing and drainage due to underground garage floor elevation than outdoor road elevation, therefore, preventing storm water road pavement when intrusive is the drainage design of the first question, the second, vehicle entrances open part of the collection of rain water, rinse the surface of the water, extinguishing fire hydrant system and water spray systems, how to troubleshoot is the focus of the drainage design.　　According to the characteristics of these drainage, can determine the following drainage programme: in the underground garage entrance up the slope of the Department for certain elevation and set up the first set gullies to blocking outdoor flooring instantaneous water intrusion; minimum in the entrance ramp, then set the second set gullies to intercept the ramp at the rainwater; in the underground garage Interior set floor drain and drain straight tube rinse floor drainage pooling; set just the right amount of water well, buried by a drainage tube collected drainage and submersible sewage pump lifting, emission. 1.1 return water retaining at the slope of the up-slope of the water, it is particularly important in the design, it is related to the storm can resist the road when the garage rain pours. Design, usually in the lane up slope Office a slope 7.5%, higher than the outdoor terrace 300 mm slope, and the highest settings first set gullies, and then to 7.5% slope and outdoor terrace, open channel based in rainwater directly into the sewer system.　　The pools using width £ º1u for 450mm, on steel or cast iron bizi. 1.2 garage floor drainage collection underground garage floor drainage pools where drainage is located, but directly using ground slope and floor drain, garage floor on a certain number of floor drain, then buried by drainage pipes comes to collecting well. According to the garage column spacing, and generally every two cross-column spacing set a floor drain, such as leak located at the junction with the parking lane, you can take full advantage of the ground slope.　　The floor drainer and buried pipe DN100-usually use. In the driveway entrance ramp at Office second set gullies to intercept ramp rain. Due to the pools located at the bottom of the structure, so the depth should not be too big, its size with the first set of gullies.　　According to lane have no cover, should take full account of the catchment area of the ramp, and the next collection wells design flow for verification. 2, underground garage settings and collecting well submersible sewage pump selection for increasing underground drainage and third floor of the garage, just set the layer of ground floor drain and drain (PVC-U), into the bottom floor drain or water well.　　It should be emphasized that in drainage pipe collar should be set on, so as to avoid the spread of fire. Underground garage collection wells should be a grease collection wells 2.1 set settings set well water for garage drainage is important, multi-storey car-especially, when it should generally be set according to the garage and the layout of shapes.　　So each set a water well, will increase the amount of increase sucked for power distribution system and the number of automatic control systems, while at the same time as the setting of water well, the next layer of fabric backplane will be excavated deep processing, growing cost while, at the same time increase the future workload of property management and maintenance costs. In the settings set well, should make full use of the underground garage floor of concrete thickness, drainage pipe buried. As in the underground garage of backplane thickness is usually 500 ~ 600mm, drop-down bar and protective layer distance 250mm, there are 205 ~ 350mm space, you can make from buried pipe drainage through. Design time should take advantage of this height, the drainage of the buried pipe as possible, with minimum slope, drainage pipe buried with minimal design gradient, is the use of "water flows downward" principle, to extend the drainage of the length of the buried pipe, the expansion set the catchment area of water wells.　Set in the water well, but also pay special attention to the following points: (1) each set of water wells in the region should no settlement joints, expansion joints, expansion joint, according to the construction of water supply and drainage design standard stipulates: the building drainage pipes must not cross over into joints. (2) each fire partition must be set independently to drainage water well straight tube through the fire partitions. 　　In the event of fire, although fire shutter will block both fire partitions, but hazard under burial on the garage floor.　　(3) in some non-underground garage, everyone should anti protection unit independent settings set well, drainage buried pipe should not be crossing protection unit, and drainage buried pipe cannot cross the subhuman air defence zone and zone. 2.2 set well design set well mostly collection, storage and regulation of the water well, plane dimensions on underground garage, generally without too many limitations. As long as they meet the installation of submersible sewage pumps and civil construction, dismantling and loading template needs. Set the depth of wells can be divided into three parts: (1) submerged parts: that is the minimum water level below. For small power submersible pump, motor jacket cooling unit and relying on submerged in the water cooling around. This part of the height is the height of submersible pump protection. This value typically submersible sewage pump specifications for each model are provided.　　For 2.2kW or submersible pump, its height is about 300 ~ 400mm. (2) Regulation: namely the effective height. Underground garage drainage flow instability, to guarantee the submersible sewage pump not damaged because of frequent stops, according to the motor construction of water supply and drainage design code requirements, this part of the water volume is not less than the maximum a borehole pumps in automatic control of yield under 5min. At the same time, the height will be set well design depth to decide. Design, meet the requirements of the control device, typically under sensitive to compress this height, taking 500-600mm to reduce the total depth of the water well, to facilitate the design and structure appropriate to reduce cost.　　(3) ultra high sections: General take 300 ~ 400mm, the part to meet the requirements of the control system of the device and the thickness of the cover. 2.3 submersible sewage pumps role according to the overall flow and head, submersible sewage pump performance curve of efficient district select pump. And note the height of the selection of the pump dive pump protection.　　Submersible sewage pumps more preparation for a used one, when the multi-tiered underground garage or displacement is larger, the use of multiple pumps in parallel mode (use a prepared). 2.4 other local garage under the washroom and living facilities, it shall be independent in the discharge of domestic sewage pipe, independent sewage water well, independent diving sewage pump discharge, to avoid waste and odor through the floor drainer escape and snorkel-altitude emission odour, use with cutting or allowed by the corresponding particle-size particles of dirt of submersible sewage pumps.