Research On Quantitative Control Of Building Height In Southern Hilly Cities

The hilly landforms and dendritic water systems are the regional characteristic elements of hilly cities.Since ancient times,hilly cities have emphasi zed the development concept of the integration of mountains,water,and cities,in order to shape the urban spatial pattern of "showing mountains and dew".In recent years,with the rapid expansion of urban space and the rise of urban high-rise buildings,excessively high and dense "steel forests" have not only caused the "quantity" of hilly urban space scale,development intensity,etc.,but also caused the landscape pattern.And spatial morphology.Building height is a key factor affecting the landscape p attern and spatial form of hilly cities.Under the new round of “land-control-quality improvement” transformation trend of land and space planning,quantitative control of building height is imminent.In view of this,on the basis of summarizing relevant t heories and practices at home and abroad,this article summarizes the current experience and shortcomings of urban building height control methods,combines the influence mechanism of hilly city building heights,and explores hills based on "capacity measu rement-morphological modification" The quantitative control system for the height of urban buildings,and Zhangjiajie as an example for practical verification.The article is mainly divided into four parts:The first part is to ask questions,introduce the research background,research purpose and significance,research content and methods,and research framework,and explain and define the research scope and related concepts of this article.The second part is to analyze the problems.First,it sorts out t he related research and practice of building height control methods at home and abroad,and analyzes the reference and limitations of current urban building height control methods.Secondly,by extracting the regional spatial characteristics of hilly citie s,and studying the main influencing factors of hilly building height control,the influence mechanism of hilly city building height is analyzed,which provides a basis for the construction of hilly city building height control method.The third part is to solve the problem.Based on the hill height city building height influence mechanism as the starting point,integrate the current building height control method.With the help of skyline analysis tools,AHP analytic method,GIS overlay analysis,three-dimensional space model and other digital analysis platforms,Quantitative control system of urban building height based on "capacity measurement-morphological modification"."Capacity measurement" refers to the construction of a height benchmark model through three steps: land potential assessment,scenario selection,and development scale quantification;"morph modification" refers to rigid management and control of ecological,municipal,and other factors,the characteristics of hilly landscapes,and the sk y For the optimization of line contours,the height reference model is modified.Finally,through the “classical and flexible” hierarchical classification control mechanism,the effective transmission of building heights from planning control to implementation management is achieved.The fourth part is the practice verification.This study combines the project practice of building height control during the compilation of the "Zhangjiajie City Center Urban Design Guidelines",and aims at the characteristics of the hilly landscape pattern in Zhangjiajie and the current building height.The applicability of the quantitative control method for the height of urban buildings is beneficial to the urban development and construction of Zhangjiajie,and also provides a reference for the height control of buildings in other similar hilly cities.