The utilization of urban underground space(UUS)offers an effective solution to urban problems but may also negatively affect urban development.Therefore,UUS development needs better concerted guidelines to coordinate ...The utilization of urban underground space(UUS)offers an effective solution to urban problems but may also negatively affect urban development.Therefore,UUS development needs better concerted guidelines to coordinate various urban systems and the multiple components of the underground world.Sustainable Development Goals(SDGs),which should be viewed as important yardsticks for UUS development,do not explicitly mention urban underground space,although many of them are affected by both the positive and negative consequences of its development.To fill this gap,this review lays the foundations of relevant UUS concepts and uses exemplary cases to reveal that 11 out of 17 SDGs can be linked with UUS uses.These linkages also manifest that land administration,integrated planning,architectural design,and construction technology are critical dimensions for increasing the contributions of UUS to the realization of SDGs.To achieve multi-disciplinary synergies among these four critical dimensions,a collaborative approach framework based on spatial data infrastructure is required.Thus,this work provides academics and practitioners with a holistic view of sustainable UUS development.展开更多
Urban underground infrastructures(UUIs)are a vital component of built capital for urban sustainability.However,many cities are now home to a multitude of disused or underutilized UUIs,not least aged purpose-built unde...Urban underground infrastructures(UUIs)are a vital component of built capital for urban sustainability.However,many cities are now home to a multitude of disused or underutilized UUIs,not least aged purpose-built underground facilities,causing a waste of valuable underground space resource assets.In the process of urban renewal,adaptive reuse can be an attractive solution to breathe new life into underutilized UUIs,while addressing some of the modern problems of the built environment by an economically feasible means.Nevertheless,there is a prevalent absence in the current literature of the overarching planning and decision-making approaches for an adaptive reuse development of underutilized UUIs.With the intention of addressing this shortfall,this paper first lays out development strategies,then sets the generic patterns for adaptive reuse of disused or underutilized UUIs.Taking the city of Qingdao,China as a case study,detailed planning and decision-making approaches with the aid of multi-source data and spatial analysis tools are presented.It is anticipated that the findings of this research will assist the adaptive reuse development of UUIs in providing theoretical guidance and empirical evidence,thereby enhancing the role of urban underground space use in contributing to urban revitalization and urban sustainability.展开更多
Urban underground space(UUS)development has been acknowledged as a positive contribution to urban resilience(UR).Such contribution has been qualitatively addressed in recent years,but only quantitatively discussed in ...Urban underground space(UUS)development has been acknowledged as a positive contribution to urban resilience(UR).Such contribution has been qualitatively addressed in recent years,but only quantitatively discussed in few studies.Quantitative evaluation methods for UR are widely used in China and around the world,but the role of underground space is barely included.This paper provides a way to bridge this gap on the city scale.A UR evaluation framework was carefully constructed that covers the basic aspects and elements of UR.The contributions of UUS to UR were identified and integrated into the UR evaluation framework,and the measurement methods for each indicator related to UUS were determined.A case study of 19 sample cities in China were conducted using the integrated evaluation model.Correlation analysis and clustering analysis were further adopted to interpret the evaluation results,mainly with three indicators reflecting the level of UUS development,namely UUS area(m^(2)),UUS density(104 m^(2)/km^(2))and UUS area per capita(m^(2)/person).The results showed a strong correlation between UUS area and UR.The average proportion of UR provided by UUS in the 19 sample cities was 16.46%,while the maximum figure reached 29.20%.The sample cities were clustered into four categories based on the relationship between the proportion of UR provided by UUS,UUS area,and GDP per capita,where both high and low UUS area tend to provide less proportion of resilience than the medium UUS area.Corresponding suggestions for UUS utilization were proposed to assist cities in achieving urban resilience.展开更多
Spatial performance measures the space usage of each underground segment in metro-led urban underground public space(UUPS).It usually varies in different UUPS segments and at different periods.Many environmental facto...Spatial performance measures the space usage of each underground segment in metro-led urban underground public space(UUPS).It usually varies in different UUPS segments and at different periods.Many environmental factors and space attractors can influence spatial performance in UUPS including spatial configurations,transportation facilities,space design characteristics,and commercial and work-ing facilities.This study intends to figure out the temporal and spatial distribution patterns of spatial performance in UUPS and then reveal the main influential factors and their impact mechanisms.The UUPS in Jiangwan–Wujiaochang Sub-center was selected as the study case.Cordon counting methods and multiple regression models were employed to collect the pedestrian data and quantitatively analyze the correlations between pedestrian flows and candidate influential factors.The study verified that spatial configurations were the most important factors instead of underground or surface attractors.There existed an interactive effect among pedestrian move-ments,spatial configurations,and commerce distribution in metro-led UUPS.Walkway width and the distribution of metro stations could partly affect spatial performance.The influential mechanisms of metro stations were different on weekdays and at weekends.Underground segments belonging to shopping malls in UUPS had a negative impact on spatial performance only on weekdays.Results of this study can provide insights for more efficient layout planning and design of metro-led UUPS in Chinese metropolitan cities.展开更多
Metro-led underground space(MUS)plays a crucial role in modern underground space utilisation.Recent studies have shown its great potential for high-quality urban development.However,limited evidence about MUS was avai...Metro-led underground space(MUS)plays a crucial role in modern underground space utilisation.Recent studies have shown its great potential for high-quality urban development.However,limited evidence about MUS was available on a national scale,resulting in incomplete and unsystematic knowledge of MUS utilisation.The interaction relationship between MUS and the surrounding built environment also remains unclear.To fill the research gap,an automatic method for MUS identification and development features extraction was proposed based on point of interest data.We applied the method to identify the MUS in 28 Chinese cities and estimated the development status of MUS in China for the first time.The nationwide statistics of MUS and correlation analysis of development features were conducted.Results show that complex MUS(CMUS)share is significantly lower than that of simple MUS.Besides,CMUS development in China is primarily dominated by public transport and does not have a solid functional link to its surroundings.The comparative analysis of MUS development in four primary urban agglomerations was also conducted,and their development char-acteristics were discussed.The study aims to expand the planning toolkit and construct the MUS database,which sheds light on the data-driven planning for MUS.展开更多
基金This work was supported by the National Key Technology R&D Program(No.2012BAJ01B04)the National Natural Science Foundation of China(Grant No.42071251)the China Scholarship Council(File No.201806260167)。
文摘The utilization of urban underground space(UUS)offers an effective solution to urban problems but may also negatively affect urban development.Therefore,UUS development needs better concerted guidelines to coordinate various urban systems and the multiple components of the underground world.Sustainable Development Goals(SDGs),which should be viewed as important yardsticks for UUS development,do not explicitly mention urban underground space,although many of them are affected by both the positive and negative consequences of its development.To fill this gap,this review lays the foundations of relevant UUS concepts and uses exemplary cases to reveal that 11 out of 17 SDGs can be linked with UUS uses.These linkages also manifest that land administration,integrated planning,architectural design,and construction technology are critical dimensions for increasing the contributions of UUS to the realization of SDGs.To achieve multi-disciplinary synergies among these four critical dimensions,a collaborative approach framework based on spatial data infrastructure is required.Thus,this work provides academics and practitioners with a holistic view of sustainable UUS development.
基金supported by the National Natural Science Foundation of China(Grant No.42201284)the China Postdoctoral Science Foundation(Grant No.BX2021220).
文摘Urban underground infrastructures(UUIs)are a vital component of built capital for urban sustainability.However,many cities are now home to a multitude of disused or underutilized UUIs,not least aged purpose-built underground facilities,causing a waste of valuable underground space resource assets.In the process of urban renewal,adaptive reuse can be an attractive solution to breathe new life into underutilized UUIs,while addressing some of the modern problems of the built environment by an economically feasible means.Nevertheless,there is a prevalent absence in the current literature of the overarching planning and decision-making approaches for an adaptive reuse development of underutilized UUIs.With the intention of addressing this shortfall,this paper first lays out development strategies,then sets the generic patterns for adaptive reuse of disused or underutilized UUIs.Taking the city of Qingdao,China as a case study,detailed planning and decision-making approaches with the aid of multi-source data and spatial analysis tools are presented.It is anticipated that the findings of this research will assist the adaptive reuse development of UUIs in providing theoretical guidance and empirical evidence,thereby enhancing the role of urban underground space use in contributing to urban revitalization and urban sustainability.
基金supported by the National Natural Science Foundation of China(Grant Nos.52090083 and 42071251).
文摘Urban underground space(UUS)development has been acknowledged as a positive contribution to urban resilience(UR).Such contribution has been qualitatively addressed in recent years,but only quantitatively discussed in few studies.Quantitative evaluation methods for UR are widely used in China and around the world,but the role of underground space is barely included.This paper provides a way to bridge this gap on the city scale.A UR evaluation framework was carefully constructed that covers the basic aspects and elements of UR.The contributions of UUS to UR were identified and integrated into the UR evaluation framework,and the measurement methods for each indicator related to UUS were determined.A case study of 19 sample cities in China were conducted using the integrated evaluation model.Correlation analysis and clustering analysis were further adopted to interpret the evaluation results,mainly with three indicators reflecting the level of UUS development,namely UUS area(m^(2)),UUS density(104 m^(2)/km^(2))and UUS area per capita(m^(2)/person).The results showed a strong correlation between UUS area and UR.The average proportion of UR provided by UUS in the 19 sample cities was 16.46%,while the maximum figure reached 29.20%.The sample cities were clustered into four categories based on the relationship between the proportion of UR provided by UUS,UUS area,and GDP per capita,where both high and low UUS area tend to provide less proportion of resilience than the medium UUS area.Corresponding suggestions for UUS utilization were proposed to assist cities in achieving urban resilience.
基金supported by the National Natural ScienceFoundation of China(NSFC)(Grant number 42071251).
文摘Spatial performance measures the space usage of each underground segment in metro-led urban underground public space(UUPS).It usually varies in different UUPS segments and at different periods.Many environmental factors and space attractors can influence spatial performance in UUPS including spatial configurations,transportation facilities,space design characteristics,and commercial and work-ing facilities.This study intends to figure out the temporal and spatial distribution patterns of spatial performance in UUPS and then reveal the main influential factors and their impact mechanisms.The UUPS in Jiangwan–Wujiaochang Sub-center was selected as the study case.Cordon counting methods and multiple regression models were employed to collect the pedestrian data and quantitatively analyze the correlations between pedestrian flows and candidate influential factors.The study verified that spatial configurations were the most important factors instead of underground or surface attractors.There existed an interactive effect among pedestrian move-ments,spatial configurations,and commerce distribution in metro-led UUPS.Walkway width and the distribution of metro stations could partly affect spatial performance.The influential mechanisms of metro stations were different on weekdays and at weekends.Underground segments belonging to shopping malls in UUPS had a negative impact on spatial performance only on weekdays.Results of this study can provide insights for more efficient layout planning and design of metro-led UUPS in Chinese metropolitan cities.
基金the support provided by National Natural Science Foundation of China(NSFC)(Grant Nos.42071251,52090083).
文摘Metro-led underground space(MUS)plays a crucial role in modern underground space utilisation.Recent studies have shown its great potential for high-quality urban development.However,limited evidence about MUS was available on a national scale,resulting in incomplete and unsystematic knowledge of MUS utilisation.The interaction relationship between MUS and the surrounding built environment also remains unclear.To fill the research gap,an automatic method for MUS identification and development features extraction was proposed based on point of interest data.We applied the method to identify the MUS in 28 Chinese cities and estimated the development status of MUS in China for the first time.The nationwide statistics of MUS and correlation analysis of development features were conducted.Results show that complex MUS(CMUS)share is significantly lower than that of simple MUS.Besides,CMUS development in China is primarily dominated by public transport and does not have a solid functional link to its surroundings.The comparative analysis of MUS development in four primary urban agglomerations was also conducted,and their development char-acteristics were discussed.The study aims to expand the planning toolkit and construct the MUS database,which sheds light on the data-driven planning for MUS.
