Outdoor water supply and drainage design features

Outdoor water supply and drainage design features Abstract: Building Community water supply and drainage process due to residential location, the role of different processes and architecture within the water supply and drainage, urban water supply and drainage processes are different, has its unique features, it is known as the city and the building at the junction. This article describes the major city of Guangzhou University of outdoor teaching area the basic situation of water supply and drainage design, focusing on an integrated pipeline design and outdoor use and construction of water supply and drainage pipe characteristics. 0 Introduction Community water supply and drainage design should not only link with the large municipal water supply and drainage is good, but also with the construction monomer into the pipe linking the household, and properly handle the 1 and 2 the design depth. Can refer to the design specifications have outdoor water supply design specifications, outdoor drainage design specifications, Residential Area Water Supply and Drainage Design Code, integrated planning of urban Engineering pipeline specification and so on, must be accurate to use in the design specifications, to know their application conditions. I completed the large city of Guangzhou University Teaching Area outdoor water supply and drainage project planning, preliminary design, construction drawing design a series of work on the drainage district to a better understanding of the design process now, and readers exchange our Experience in the design district water supply and drainage with a view to improve together. 1 Project Overview Guangzhou University City west Luoxi Island, north of biological Island, east of Cheung Chau Island. Everywhere you with the Pazhou Island, the sea, the planning scope of the study 43.3km2. Away from the Guangzhou center is approximately 17km, from the Shiqiao about 13km, from the Guangzhou Metro is about 17km. In 2001, the Guangzhou City to complete the preparation of the overall Development Strategy of Guangzhou Urban Planning, planning to determine the east and south as the center of the main direction of urban development. Central city to determine the basic orientation space layout: North good, South Extension, west, the East Union. Guangzhou University, Guangzhou City is an important node in the South Extension-axis is an important part of the Guangzhou Information Port is a high-level talent training base in South China, scientific Research and communication center, based on the knowledge economy and information technology-led new technologies industrial base is one of academia, research, production and integrated development of information Technology for the 21st century eco-citys new functional areas. The design of Guangzhou University City is divided into five delegations which belong to the first formed a delegation Sun Yat-sen, while the Sun Yat-sens design is the teaching area and living area is divided into two zones. Outdoor teaching area water supply and drainage are primarily designed to drain pipes and accessories for outdoor design, in which water supply pipes four (two living, two fire), drainage line 2. Life pipeline from large municipal water line to the introduction of the fire tube cell lines from the book draws fire pump pressure in order to ensure water security, water supply pipelines are arranged along the circular loop of teaching areas. Teaching Area sewer network to collect sewage discharged into the post-dispersion large municipal sewer networks, storm water through rain water pipe network into the teaching areas nearest water body. The design of positive response from the Guangzhou University City first-class planning, class design, first-class building, first-class quality of the building requirements. 2 pipeline synthesis With the socio-Economic development and peoples living standards improved and the city roads under the municipal pipelines and sophistication. In order to reduce excavation of the phenomenon of secondary roads to maintain peoples normal daily life, to avoid the human and material waste, in a professional pipeline design a good macro-control before municipal pipelines. Foreign and domestic use of integrated trench some cities to solve this problem. This is particularly busy on traffic is not permitted at any time excavation and underground space in particular is particularly advantageous for small sections, but there are disadvantages of an integrated trench: one-time Investment in large, in charge of the pipeline is difficult to reconcile the differences, trench inside the ventilation, fire protection, drainage problems and is difficult to properly handle cross-section size and its very difficult to predict. In view of the above and combining the characteristics of southern cities, the authors believe that in general is located under the roads and may from time to trench, but by reasonable arrangements for pipe-bit, reasonable control of pipe elevation of a similar nature made a small trench lines and other methods to solve this problem. 2.1 tube-bit on the road layout The main loop of teaching a wide area 16m, only the driveway and sidewalks, without fast, slow lane of the points, on the road on both sides of the green belt. According to Urban Engineering Pipeline integrated planning norms (GB 50289-98) (hereinafter referred to as norms) provides that one side of this road simply piping. Zhongshan University Teaching Regional Road tube-bit layout As the rain and sewage pipe diameter larger and deeper depth, so be arranged in the driveway the next. To the pipe diameter is small, and is buried in the depth of the pressure pipe, high frequency of maintenance is generally located in, under the sidewalk, so on both sides of the sidewalk to the water mains and 2 were set near the side of the road center line. Electric power, telecommunications pipes are situated at both sides of the sidewalk away from the side of the road centerline. 2.2 Height Control Pipeline Reasonable arrangements for the pipeline should be the reasonable control plane location of pipeline elevation. In general, from top to bottom in the order pipeline for the power tube (ditch), the Telecommunications tube (ditch), gas pipes, water pipe, heat pipes, rainwater pipes, sewage pipes. The design of the power tubes (Groove) General deeply about 1.2m, telecommunications management Goushen to 1.3m, the 1.4m the gas control is about control of water supply pipe casing around 1.0m, but will the rain and sewage pipe from the casing control In the 1.5m or so, in the height of the basic staggered to enable the pipeline. If the pipeline at the height of the touching, then to comply with pressure pipes for gravity pipe, small diameter to large diameter, branch pipes for trunk principle. 2.3 Pipeline Pitch Control Norms provisions, the general municipal minimum vertical spacing between lines of 0.15m, the individual lines, such as electricity and other pipeline trench minimum vertical spacing of 0.50m, which in the actual engineering operation difficult to achieve. General pipeline spacing "；0 can be construction, Shanghai GM plans drainage channels in the discharge pipe between the spacing is greater than zero and less than the thickness of the pipe-based cases where the party package of concrete pipe reinforcement, and therefore a comprehensive municipal pipelines planning, in addition to electricity cables and gas pipes with the heat when you cross the minimum vertical spacing for the control of the 0.5m, the other pipelines integrated planning, the minimum vertical spacing of pipeline "；0. The design is difficult to avoid some pipelines were made of cross-well form of sewage pipelines directly through the cross-wells, while the rainwater pipeline break in the wells。 rain and sewage pipe cross-well approach For small diameter pressure pipeline and gravity pipelines crossing can not be avoided, the four 45 elbow can be used to bypass. pressure, gravity pipe, when the practice of cross - If the water pipe and pressure pipe for gravity pipes from the top of the Traveling while Futuhoudu not, they can go from the pipes below, but to be done to the steel casing pipe to prevent water pollution. 3 Pipe selection China in recent years, the pipeline quality requirements more strict about the pipe and fittings and technological development very seriously and putting in a lot of money for development and research work. And piping bulk material to pipe the water quality of secondary pollution great influence on pipe option is technical and economic results of this comparison, for water and calcium carbonate (magnesium) and scaling, the water solubility of iron ion oxidation of pipeline corrosion, scaling, as well as The blockage of some biological state, is often an important factor in selection of pipe materials on the other hand. The buried pipeline conveying fluid pressure to bear over many years, soil and ground load of the external pressure, high temperature caused by the change of tensile stress, as well as the uneven settlement of foundation, etc. The combined stresses, but also to withstand water hammer impact, so pipe should first have sufficient strength. At present a number of provinces and cities in China such as Dalian, Shanghai, Guangdong, Fujian, Hubei, Hunan and other places the building department has issued a circular to ban use of galvanized pipe to the drain pipes and drainage cast iron pipe, to promote the use of UPVC rigid PVC plastic pipes and UPVC drain. Features a variety of pipe are as follows: Prestressed Reinforced Concrete Pipe The diameter of this tube are in 300mm above the basic, most are used for large flow drainage projects. Price than other materials is characterized by large-diameter tubes are lower, but higher than before. Under normal circumstances without water corrosion, but the elbow, tee and other parts of the production is still blank. Polyethylene pipe (PE) PE pipes in order to distinguish between the density, there are low-density polyethylene pipes (LDPE), medium-density polyethylene pipe (MPVC), high-density polyethylene pipe (HDPE). LDPE flexible pipe, elongation, good impact resistance, chemical stability and anti-high-frequency sound insulation, mainly for agricultural irrigation. HDPE pipe with high strength and rigidity, MDPE pipe also has good flexibility and creep resistance. Aluminum-plastic composite pipe (PAP) Aluminum-plastic composite pipe is manufactured by extrusion process a new type of composite pipe, which consists of polyethylene layer (or cross-linked polyethylene) - adhesive layer - aluminum - adhesive layer - polyethylene layer (or cross-linked Polyethylene) five-layer composite structure. Aluminum layer in which sub-lap welding, butt welding forming process. Kong Steel plastic composite pipe network It is similar to aluminum-plastic composite pipes, only in an alternative porous strip welding thin aluminum strip welded tube roll roll tube, it is based on high-density polyethylene as the base body, to post-cold-rolled steel punching mesh welded steel pipe for the enhance the body by a continuous extrusion molding compound made of plastic through a metal skeleton inside and outside the walls on the pore-forming one. This pipe has a three-tier structure, plastic and metal in the wall of mutual tolerance, one can prevent the separation of plastic and metal frame and peeling off. Casing can be used to connect pieces of pipe welded electrical connections, can also be used Aprons pipe fittings quick connect, it has the mechanical strength of steel, but also with a plastic pipe corrosion resistance, applicable to DN 200mm of water distribution pipes and indoor cold water Main Li-pipe use. Galvanized steel pipe lined with plastic composite pipe Galvanized steel pipe lined with plastic, there are two methods for a spray inside the lining of polyethylene, the other is hot dip galvanized steel tube with a special level of interference with the process, combined extrusion of polyethylene, polypropylene pipes, both current domestic product of this in two ways, the former kinds of hard coatings lining Nianlao not easy lining uniform, easy layering； effect of the latter approach is better, but the fitting MBTOC polyethylene liner within the spray. Pipe assembly