Analytic Hierarchy Process In Urban Public Space Design And Application Research Of Green Transformation

Along with our country city changes a process to accelerate, the city scale expansion, many of the city’s urban area because area advantage is lost gradually, infrastructure is not perfect and urban green space system layout is unreasonable wait for an element, make old city urban vitality is lost, is hollow and marginal, then affects the whole image of the city and the life quality of residents. Accelerate old city public space green space design, not only can improve the image of the city, improve the city’s ecological environment and meet the recreational needs, can also improve the urban functions, improve urban vitality. At present in the green transformation design from the environmental characteristics, functional analysis and other aspects discussed more, but from a quantitative point clear transformation key and content is less, not conducive to the old city green space construction and retrofit scheme evaluation.The results show that:China’s old city public space of city green space according to the need of development, from improves the city ecological environment, enhance the city image and perfect city function point of view, can be divided into roadside greenbelt, riparian green, city road green space, green square and park five green transformation type.According to the function of green public space quality requirements, using analytic hierarchy process, select the3rule layer,17indexes, set up for the public space in the hierarchical structure model of green. Combined with a green space requirements, through experts assign weight, can reach five kinds of green space in each kind of factors weight value. The results are as follows:(1) The roadside green space, ecological function is the most important, followed by the use of function, landscape function. From the index weight, can be informed, roadside green space on each index layer factor, reducing noise, regulating climate, as the rate of green, disaster refuge and facilities are relatively the most important several factor.(2) Riverside park green space, ecological function is the most important, followed by the landscape function, the use of function. From the index weight, can be informed, Riverfront Park each index layer factor, as the rate of green, regulating climate, plant diversity, community landscape level is relatively the most important several factor. (3) The city road green space, landscape function is the most important, followed by ecological function, the use of function. From the index weight, can be informed, city road green space on each index layer factor, regulating climate, reduced noise, mitigation evacuation sites and facilities are relatively the most important several factor.(4) The green square, use the function is the most important, followed by the landscape function, ecological function. From the index weight, can be informed, the green square each index layer factor, disaster refuge and facilities, environmental sanitation and facilities, entertainment venues and facilities, safety is the most important of several factors.(5) Comprehensive park green space, ecological function is the most important, followed by the use of function, landscape function. From the index weight, can be informed, the green square each index layer factor, as the rate of green, disaster refuge and facilities are relatively the most important several factor.The five space in each kind of factor weights based on size, according to the index system using expert scoring method for condition evaluation priority transformation, can be obtained by the computation value. The function of importance" and transformation of the" urgency", according to the index value can find out the transformation contents and key points of design, to provide a reference value, but also the retrofit scheme optimization and evaluation.In order to verify the public space Green Evaluation System in practice, the feasibility of the project, the evaluation system is applied to the Chengdu City Wenjiang Liu town green project, Greenbelt Types by referencing the corresponding weight values, combining expert to willow river and two riparian green field status score, summarizes each reform target priority transformation value, make green renovation projects have achieved good results, confirmed by public space Green Evaluation System in practical project application feasibility.