Study On Vertical Greening Application Of Overpass In Changsha Main City

As the product of urbanization development,urban overpass is an important element to form urban landscape.The application of vertical greening to urban overpass not only increases the urban green quantity in the facade space,improves the urban ecological environment quality,but also glorifies the urban landscape.Changsha,as a model city for greening and eco-environmental protection in China,must adhere to the road of sustainable development and implement the goal of energy conservation and emission reduction.Vertical greening,as one of the important forms of urban greening,is an energy-saving and environmental protection technology to promote sustainable development,which is in line with the current urban positioning in Changsha.This paper takes Changsha main urban overpass as the research object,the f ull text is divided into five chapters,from the ecological,economic,landscape,safety and functional point of view,carry out the following research:The first chapter,through the comprehensive analysis of the current research situation at home and abroad,understand the needs of vertical greening technology and overpass symbiotic development,This paper determines that the research focuses on supplementing and perfecting the relevant theories of overpass vertical greening application,in order to ask questions,analyze problems and solve problems as the logical context of the full text.The second chapter,analyzes the basic situation of Changsha,combined with the field investigation of the overpass vertical greening of Changsha main urban ar ea,summarizes the problems existing in Changsha overpass vertical greening,and clarifies the research direction.The third chapter,using the principles of ecology,landscape science,botany and so on,analyzes the composition types of overpass vert ical greening,summarizes the influencing factors and composing system of overpass vertical greening,analyz es and compares vertical greening four major technical forms.In the fourth chapter,through the analysis of the design principle and performance method of overpass vertical greening,the strategy suitable for vertical greening design of Changsha overpass is selected,the construction of bridge wall,bridge protection bar and bridge column vertical greening landscape is discussed respectively,and the reasonable and feasible design suggestion of overpass vertical greening is put forward.The fifth chapter,through the selection of Changsha in the main urban area has not yet implemented vertical greening construction of the overpass as the ma in research object,the use of the selected design strategy,the Wangjiawan overpass case analysis,and put forward the proposal,for the research results of this paper to provide an example demonstration.The vertical greening of overpass is an important way to enrich the urban greening landscape and soften the urban contour,and also a feasible measure to imp rove the urban environmental pollution problem.Taking the application of overpass vertical greening in Changsha main urban area as an example,this paper makes a systematic study on it,hoping to strengthen people's understanding of overpass vertical gree ning,provide valuable reference for the construction of Changsha overpass vertical greening,and promote the construction of overpass vertical greening.