Planning and construction of Xiong’an New Area(city of over 5 million people):Contributions of China’s geologists and urban geology

China established Xiong’an New Area in Hebei Province in 2017,which is planned to accommodate about 5 million people,aiming to relieve Beijing City of the functions non-essential to its role as China’s capital and to expedite the coordinated development of the Beijing-Tianjin-Hebei region.From 2017 to 2021,the China Geological Survey(CGS)took the lead in multi-factor urban geological surveys involving space,resources,environments,and disasters according to the general requirements of“global vision,international standards,distinctive Chinese features,and future-oriented goals”in Xiong’an New Area,identifying the engineering geologic conditions and geologic environmental challenges of this area.The achievements also include a 3D engineering geological structure model for the whole area,along with“one city proper and five clusters”,insights into the ecology and the background endowment of natural resources like land,geothermal resources,groundwater,and wetland of the area before engineering construction,a comprehensive monitoring network of resources and environments in the area,and the“Transparent Xiong’an”geological information platform that is open,shared,dynamically updated,and three-dimensionally visualized.China’s geologists and urban geology have played a significant role in the urban planning and construction of Xiong’an New Area,providing whole-process geological solutions for urban planning,construction,operation and management.The future urban construction of Xiong’an New Area will necessitate the theoretical and technical support of earth system science(ESS)from various aspects,and the purpose is to enhance the resilience of the new type of city and to provide support for the green,low-carbon,and sustainable development of this area.

Practical Strategies for Urban Rail Transit Loop Planning, Construction, and Operation

Urban rail transit loops are essential in urban rail transit systems and transportation networks.However,precise requirements and reference standards for rail transit loop design have yet to be established.There are certain areas for improvement in planning,construction,and operation.In the planning and design of urban rail transit loops,the scale of the city and the relationship between line operations should be considered to ensure that the line conforms to the city’s operating traffic conditions and can effectively cater to peak passenger flow requirements.This article presents strategies for planning,constructing,and operating urban rail transit loops,laying the foundation for the healthy operation of urban rail transit.

Planning and Design of Health-care Featured Town from the Perspectiveof“Aging Friendly”:A Case Study of Tangwan Town,Guixi City,Jiangxi Province

Under the background of current“aging”and“healthy China”,based on basic needs of theelderly for health care industry,combining the upsurge of featured town construction in China,basicproblems existing in current planning and construction of featured town are expounded and analyzed.Tangwan Town of Guixi City,Jiangxi Province is taken as the research object.Characteristics of theconstruction of health-care featured town and its existing problems are found,and planning strategy isproposed.The research aims to provide reference significance for planning and construction of suchfeatured towns,and promote the perfection of the theory of health-care town in China under agingbackground.

Component Analysis and Calculation for Social Benefits of UHV Assessment

With the rapid development of the UHV power grid, evaluation of the economic and social benefits of the UHV power grid is conducive to guiding the planning and construction of UHV power grid. At present economic benefit evaluation system of the UHV power grid is driving to maturity stage on the whole at home and abroad, but it invariably tends to regard social benefits as part of economic benefits, without evaluating social benefit separately. The social benefit evaluation model of UHV power grid is built in case of sufficient investigation. The differentials between social benefit and social cost are calculated respectively by three kinds of solutions according to the constructed social cost evaluation index system and social benefits evaluation index system, conclusion that UHV power grid transmission has better social benefits can be reached by contrastively analyzing the social three kinds of solutions corresponding to benefits. At last, the evaluation model and method are verified and analyzed through the analysis of engineering projects.

Analysis of the Planning and Construction of Chuanfu Housing Estate in Tianjin

Chuanfu Estate is located in the Nankai district ofTianjin.It is one of three experimental housing estates desig-nated by the Ministry of Construction of the People’s Re-public of China in 1986 for the northern part of thecountry.It is included in the National Seventh Five-YearPlan’s leading research program.Chuanfu Estate was builtaccording to the ″integral-planning,rational-layout,com-

厦门城市防护林体系的规划与建设

通过对厦门城市防护林现状和存在问题的分析,提出了防护林建设的原则、树种选择和规划。