| Along with the accelerating urbanization process,various ecological and environmental problems have emerged in an endless stream,the urban built-up area has been expanding,the urban population has been increasing,and the urban environment has been seriously polluted.Environmental degradation,ecological imbalances,declining air quality,and vegetation destruction have all become important issues that constrain China's sustainable development.With the rapid development of the social economy,people's requirements for the living environment are getting higher and higher,and the green,energy-saving and environmentally-friendly building space has gradually become the goal pursued by people.The construction of roof greening not only provides more green space for the city,but also an effective way to improve the urban ecological benefits and beautify the urban landscape.Compared with the rapid development of roof greening at home and abroad,the roof greening in Xi'an has started late and the development is slow.There is still huge room for development of roof greening.This paper has carried out systematic investigation and research on roof greening in Xi'an,and summarized the following items:1.This paper firstly studies and summarizes the theory of roof greening,and systematically analyzes the research on roof greening type,benefit,structure and development at home and abroad,and summarizes the status quo of urban construction with rapid roof greening development at home and abroad.2.Through the investigation and analysis of the climatic conditions,construction policies,construction status and technical specifications of the roof greening in Xi'an,it is concluded that the current situation of roof greening practice in Xi'an is slow to construct,lack of policy conditions,and imperfect technical specifications.The problem of simple application of plants.3.By selecting the representative 18 green roof samples with different construction years,different districts,different building types and different roof greening types in Xi'an,through comparison and analysis,it is found that the roof greening in Xi'an is mainly garden and lawn.Mainly,and concentrated in commercial buildings.The garden-style landscape has a good effect,and both the lawn type and the combined type have the plant wilting and the landscape facilities are broken due to the lack of maintenance management.Combined with the different needs of the crowd,the roof greening construction adaptation proposal is proposed for the status quo of roof greening construction.Commercial buildings are suitable for garden-style roof greening and turf-type roof greening.Cultural and educational buildings are suitable for turf-style roof greening.Administrative office buildings are suitable for construction combination.Roof greening,medical buildings are suitable for garden-style roof greening and turf-style roof greening,and residential buildings are suitable for turf-style roof greening.4.hrough the survey on the awareness and recognition of roof greening in Xi'an City,the public awareness of roof greening in Xi'an was not in place,people did not understand the greening of the roof,and people had great demand for roof greening and were willing to participate in roof greening.The status quo of construction work.5.Through the comprehensive evaluation of the landscape of 18 sample sites,it is found that the roof greening in Xi'an is at the level II standard.The overall situation has not yet reached the ideal state,and there is still room for improvement.Comprehensively analyze the weight setting and evaluation results of the evaluation indexes of each roof greening,and propose optimization measures for ecological,ornamental,safety and serviceability of garden-style roof greening,combined roof greening and turf-type roof greening in Xi'an.Garden-style roof greening should be designed with safety and service as the core value points,and it should provide optimization suggestions for public recreation demand and plant cultivation and maintenance management;the combination should be based on ornamental and ecological as the core value point,and Optimization suggestions are proposed from the aspects of plant cultivation and plant landscaping;while turf type takes ecological as the core value point and proposes from plant cultivation and variety selection.6.Through the investigation and research on the roof greening practice in Xi'an,and the results of landscape evaluation,the development of roof greening in Xi'an is proposed from the policy theory,design mode,maintenance management and innovation development direction to guide the development of roof greening in Xi'an. |
PDF Full Text Request