| In recent years,under the macro-policy control and under the background of improving people’s happiness,urban design practice has changed from "growth rate development" to "high-quality development".As the main product of three-dimensional urban construction,underground commercial streets have been promoted to all domestic cities and become one of the most important functions of urban underground space.However,the environment of underground commercial street is different from the above-ground environment.People are used to the environment shaped by natural elements such as air,sunlight and green plants.However,the underground environment of underground commercial street has disadvantages in terms of material environment,which is difficult to meet the most basic physiological needs of people.This study mainly starts from the green allocation elements of underground commercial streets.Through scientific methods such as literature review,practical investigation,SD scale questionnaire,eye movement test,mathematical analysis,etc.,the thesis carries out comprehensive research and quantitative analysis on the green allocation elements of underground commercial streets and draws conclusions,and provides design basis for the green allocation design of underground commercial streets.Based on the theories of pro-nature,environmental psychology and visual comfort,this thesis takes underground commercial streets in more than 30 cities as the research object,and discusses the relationship between the green configuration elements of underground commercial streets and visual comfort.The author conducted field research and data collection in Xuzhou,Nanjing,Shanghai,Beijing and other cities.First,through experiment 1,the extraction of green allocation factors of underground commercial street was carried out,mainly from three dimensions: plane element of green allocation,elevation element of green allocation,and overall spatial influence factor of green allocation.Two methods of comprehensive sorting of factors and mathematical analysis of visual cognitive variables and green allocation factors were adopted.It is determined that the factors influencing the green allocation of underground commercial street are green view index,crown width and crown height.Secondly,quantitative analysis of influencing factors of underground commercial street greening allocation was carried out through experiment 2.The correlation between visual variables and overall satisfaction and influencing factors of green view index,crown width and crown height of green planting space was explored through SD scale questionnaire and eye movement experiment,as well as difference analysis,factor analysis,correlation analysis and scatter plot analysis.The variation trend and optimal value between each factor,overall satisfaction and visual variables were obtained.Finally,the comprehensive score of eye movement evaluation in each scene was analyzed through the comprehensive score of the scene and the comprehensive score of the SD questionnaire were basically consistent.The results show that:(1)Green view index is an important factor affecting the visual comfort of underground commercial street greening configuration,and the optimal green view index of underground commercial street greening configuration is about 10%.(2)The layout of underground commercial street green layout can effectively improve the visual cognition of the subjects,among which the surface layout can improve the visual cognition the most.(3)The layout orientation of underground commercial street green configuration can effectively improve the visual cognition of the subjects,among which,in the overall evaluation of visual cognition,middle layout > bilateral layout > unilateral layout.(4)The study found that eye movement experiment played a role in the verification of SD questionnaire.The comprehensive score of visual cognition factor and eye movement index factor of underground commercial street greening was analyzed,and the comprehensive score of visual comfort cognition factor of each scene was basically consistent with the comprehensive score of eye movement index of each scene.From the perspective of environmental psychology and visual comfort,this study made a mathematical analysis of the underground commercial street greening through SD questionnaire and eye movement experiment.The optimal range of strongly correlated factors and the specific correlation and influence degree of each visual cognitive factor were explored.It provides the theoretical basis for the future layout design of underground commercial street greening and fills the blank of underground space greening research.There are 45 figures,41 tables and 118 references in this thesis... |
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