Investigation Of The Landscaping Situation And Study On Reform Design Of The Overpass In Changsha

The urbanization process of Changsha are increasing deepening with the rapid development of our country economy in nowadays, the overpasses emerge as the times require that resolve the problem of traffic pressure in Changsha.It will be a challenge because the emergency of overpass which has relative large mass and floor space in urban public facilities under the background of the scarce urban land resources and gradually increase building density. Therefore, more and more people begun to pay attention to this issue that how afforest the overpass. The author do this research about the garden plant greening of the overpass in Changsha base on combining combed and summarized mass literature and information and field survey nichetargeting. The main research resultses are as follows:Firstly, the green space of overpass defined as two parts that virescence of bridge construction that contains gold cylinder,protective fence,wall space and the central isolation belt and its attached green space which includes gold cylinder,protective fence,wall space and the central isolation belt and its ambitus which include side slope,green island and its vicinity green space,base on the previous research and the structure of overpass.Secondly, the author respectively analyse the Sifangping overpass,Bolong overpass,Dongfenglu overpass on the on the basis of fact finding and pertinent literature. In addition, there is an analysis of current situation of overpass in Changsha, on aspect of plant species、plant aesthetic value, community season phase. Discover and conclude the problems of Changsha overpass according to the analyse of overpass current situation. The problems main have the deficiency of local and humanity features, lacking of human design, limited application of flower ornamentals, inappropriate plants selection, Lacking of vertical greening undiversified landscape model.Thirdly, the author put forward some design principles:principle of entironment, Landscape aesthetic principle, paying attention to the participation of people, culture principles, scale and proportion。In addition, the author introduce plant arrangement modes in order to provide reference to relative worker and researcher according to related knowledge of landscape design and horticulture. The plant arrangement modes include recreation mode, ornamental mode, shade-tolerant plants mode, vertical greening mode, canopy frame type, flower box type, flower border type, flower step type.Fourthly, the author selects two green space node as case analysis which is one of Sifangping overpass and Dongfenglu overpass according to the design principle,the key points of plants choice and plants arrangement mode with the current situation, landscape evaluation and design drawing in order to establish the theories of the paperIt will be a tendency that the plants virescence of overpass with the urbanization increasing deepen of Changsha, which plays the key role in improving the whole city landscape.Take effort to advance the level of overpass virescence in order to creating a splendid scenery for our Changsha city.