Drafting And Application On Soundscape Mapping Of Urban High-speed Railway Corridor Based On Subjective And Objective Data

At present,the rapid development of high-speed railway in China has led to a series of environmental problems,and the noise pollution has become one of the increasing public concerns.The introduction of the acoustic landscape concept provides a new perspective on noise control.The research of soundscape currently focused on theoretical development,application in acoustic environment design,study on the characteristics of different regions and crowds,and soundscape mapping.Foreign theoretical research has already established a complete theoretical and technical system.The domestic research on the acoustic environment are different in objects and methods.The study of traffic corridors is focused on the noise perspective,and rarely considered from the perspective of soundscape with comprehensive consideration.With the rapid development of high-speed railway construction,this study combined with the soundscape concept,used soundscape mapping to comprehensively evaluate the acoustic environment of high-speed railway corridor,and discussed soundscape optimization and the response of noise problem.The main content of study is the drafting method and application of soundscape mapping of high-speed railway corridor.First,the high-speed railway corridor and its acoustic scope were defined,and the soundscape along the corridor is concerned from the perspective of the overall acoustic environment.Through the study of the elements of soundscape,the constituent elements of high-speed railway soundscape were analyzed.Based on the scope and constituent elements,the method and application analysis of the soundscape mapping of the high-speed railway corridor were discussed,and the frame of study was proposed.The data system of high-speed railway corridor soundscape consists of objective sound field data,subjective perception data,and corridor environment data.The different data collection methods are described separately,and the subjective and objective data is graphically completed with the GIS platform.Based on the soundscape database and soundscape mapping,the integrated analysis of soundscape data of high-speed railway corridor and the application of soundscape mapping were studied.From the perspective of the spatial and temporal characteristics of soundscape,the changes of the acoustic environment of high-speed railway corridor was summarized.And the integrated evaluation of soundscape data and the criteria for priority of soundscape improvement were proposed in view of IPA.The Chengdu-Mianyang-Leshan High-Speed railway was selected as the case for the soundscape mapping production and application of the high-speed railway corridor.After screening,four typical sound-sensitive points were identified,including green land,schools and residential areas.And the corresponding soundscape mapping was drawn by data collection and transformation.Through the integrated analysis of subjective and objective data,it is found that when the overall acoustic environment satisfaction is high,it would affect sensitivity to high-speed railway noise and reduce the level of annoyance.Finally,the understanding of the soundscape resources in the region were cleared,corresponding to different levels of optimization measures,and the results of the soundscape mapping were used to the actual soundscape quality improvement of the high-speed railway corridor.And the soundscape optimization design of high-speed rail corridor based on soundscape mapping was completed for an actual measurement point.In summary,this study is a useful exploration in the field of soundscape.