Research On Engineering Pipelines Of The Water Supply And Drainage Of New Mountain Cities In Loess Plateau

With the Chinese city of western development strategy and the advancement of the Shaanxi Gansu old revolutionary base areas to accelerate the pace of construction and promote the construction of energy and chemical industry base of urban development,Yan'an center city population agglomeration trend has been significantly increased,urban spatial expansion ability strong.Yan'an city and many mountain city,is a linear mountain,located between the three rivers,city development is squeezed,the whole city was stretched flat,the city space layout cramped,caused by dangerous force Ecuador geographic space and bring traffic inconvenience and geological structure of collapsible loess in the mode of living.Seriously restricts the development of Yan'an.Therefore,in order to solve the city space layout cramped,ease traffic congestion,improve the city view and contradiction for effective protection of historical and cultural city,actively expand the city area,looking for a new city development space,has become the city to solve the problems of Yan'an City Center District,a breakthrough to relieve the population pressure.In this situation,the Yan'an municipal government put forward the "sparse expansion,mountain city" strategy,develop Yan'an new area into four,including Yan'an district north project planning in the central city of Yan'an in the area north of the construction of the municipal administrative and commercial center,production and service of mountain city.However,restricted by the topography around the downtown area of Yan'an,the new town base is located in the Loess Hilly and gully region with poor natural conditions.Therefore,in order to build a new town with high quality of life,low security risks and satisfying the characteristics of the Loess Plateau,it is necessary to put forward higher requirements for the planning of Metro water supply and drainage engineering pipelines.The project is located in the loess gully loess area,geological conditions and hydrological geological condition is very complex,with special geotechnical structure characteristics and engineering properties of collapsible loess,but also has high embankment,large earthwork,complex construction environment and influence factors of the characteristics of Yan'an new district the water supply and drainage pipeline project planning and construction of complex and difficult technical problems.In this paper,through a comprehensive set of North Metro construction,combined with the terrain environment,introduction to the northern New District water supply and drainage engineering pipeline planning,and put forward in the Loess Hilly Gully Area Planning of water supply and drainage engineering pipeline some suggestions and opinions,so as to accumulate experience for the same type area "mountain city",to provide demonstration and some reference.