Recently,underground space evaluation has become fundamental for a city’s long term sustainable development planning.This paper,based on the 3D-GIS tools,adopts"multi-factors comprehensive evaluation"models...Recently,underground space evaluation has become fundamental for a city’s long term sustainable development planning.This paper,based on the 3D-GIS tools,adopts"multi-factors comprehensive evaluation"models to establish a practicable underground space resources quantitative evaluation system.It sets up展开更多
Underground space utilization and exploration is an irreversible trend for promoting sustainable development especially in megacities.Geotechnical engineering safety is always one of the most important issues in all p...Underground space utilization and exploration is an irreversible trend for promoting sustainable development especially in megacities.Geotechnical engineering safety is always one of the most important issues in all phases,including planning,design, construction and operation,of the underground project.Engineering geological and hydro-geological characteristics of the foundation rock mass展开更多
Urban development continues to reduce the amount of available ground space.The development of underground space is thus gath-ering increasing attention to alleviate ground congestion.However,there is currently a lack ...Urban development continues to reduce the amount of available ground space.The development of underground space is thus gath-ering increasing attention to alleviate ground congestion.However,there is currently a lack of a three-dimensional(3D)evaluation method to systematically evaluate the geological conditions of underground space and possible geological disaster risks caused by rock and soil masses.This paper presents an engineering geological suitability assessment framework based on 3D geological modeling and an analytic hierarchy process(AHP)-cloud model.As the basis for 3D evaluation,a 3D structural model of the study area is established based on the drilling data and geological profiles.Then the structural model is partitioned to obtain interpolation grids,and the ordinary Kriging interpolation method is applied to attribute interpolation.All the attributes are exported from the geological model,and the rock and soil masses are divided into four categories according to their engineering properties,namely soft soil,sandy soil,cohesive soil,and rock,upon which a targeted hierarchy structure is established based on the attributes that impact the suitability.This paper intro-duces the cloud model to characterize the uncertainty of these evaluation indexes,which synthesizes an AHP method,thus it is referred to as the AHP-cloud model.This new model is used to evaluate the geological suitability of underground space in the Sanlong Bay district,Foshan City,Guangdong,China.In addition,we also determine the excavation difficulty at different depths according to the lithology and weathering degree of the study area.The limitations and future directions of the proposed method are discussed,including the influ-encing factors and weight determination.展开更多
【目的】随着中国进入后疫情时代,人们对在大型户外空间进行露营、野餐等集体休闲活动愈发热情与向往,构建针对城市综合公园开放共享适宜度的评价体系,可为住房和城乡建设部在全国开展的城市公园绿地开放共享试点工作提供参考。【方法...【目的】随着中国进入后疫情时代,人们对在大型户外空间进行露营、野餐等集体休闲活动愈发热情与向往,构建针对城市综合公园开放共享适宜度的评价体系,可为住房和城乡建设部在全国开展的城市公园绿地开放共享试点工作提供参考。【方法】以北京市中心城区的44个综合公园为例,通过调研量化分析影响综合公园开放共享的主要因素,包括公园可达性、周边兴趣点(point of interest,POI)功能密度、周边POI功能混合度3个外部建成环境指标,以及公园人流量、公园人均绿地空间、可开展活动丰富度3个内部属性指标,并运用熵权TOPSIS模型赋予各指标权重。【结果】综合计算得出各综合公园的开放共享适宜度,其中17个公园适合立即开放共享,22个公园需要延缓开放共享,5个公园暂不适合开放共享。【结论】在多维指标的影响下,公园开放共享适宜度与城市功能分区之间呈现出较强的相关性,公园可达性、公园人均绿地空间2个指标对公园开放共享适宜度影响较大,该结论可为城市公园可持续发展战略的制定提供参考。展开更多
With a history spanning thousands of years,the water system of Suzhou is an indispensable carrier of urban space and civil culture.Quantificational model analysis of the waterfront in the ancient city of Suzhou has si...With a history spanning thousands of years,the water system of Suzhou is an indispensable carrier of urban space and civil culture.Quantificational model analysis of the waterfront in the ancient city of Suzhou has significant implications for the future design of waterfront space and the establishment of an evaluation method to determine the vitality of such space.In this study,a vitality evaluation model was first constructed using river attributes,the spatial type of waterfront areas,vision accessibility,transportation accessibility,and combined new data extracted using spatial factor analysis.Second,a vitality evaluation matrix was established using the analytic hierarchy process to simulate the vitality of waterfront spaces.Third,a hash algorithm was employed to determine the fitting degree between the vitality model of Suzhou’s waterfront space and crowd activity.The different areas between them were found and then the factor evaluation process was adjusted on this basis of analyzing the causes.Thus,this study identified the factors influencing the vitality of Suzhou’s waterfront.Furthermore,this research constructed a model for evaluating the vitality of waterfront spaces.Finally,some guidelines were presented regarding the design and implementation of waterfront spaces in urban design.展开更多
文摘Recently,underground space evaluation has become fundamental for a city’s long term sustainable development planning.This paper,based on the 3D-GIS tools,adopts"multi-factors comprehensive evaluation"models to establish a practicable underground space resources quantitative evaluation system.It sets up
文摘Underground space utilization and exploration is an irreversible trend for promoting sustainable development especially in megacities.Geotechnical engineering safety is always one of the most important issues in all phases,including planning,design, construction and operation,of the underground project.Engineering geological and hydro-geological characteristics of the foundation rock mass
基金the Foshan Urban Geological Survey Pilot:Urban geological survey of the Boot Area of Sanlong Bay High-end Innovation Cluster Areas(Grant No.440600-202004-211001-0011).
文摘Urban development continues to reduce the amount of available ground space.The development of underground space is thus gath-ering increasing attention to alleviate ground congestion.However,there is currently a lack of a three-dimensional(3D)evaluation method to systematically evaluate the geological conditions of underground space and possible geological disaster risks caused by rock and soil masses.This paper presents an engineering geological suitability assessment framework based on 3D geological modeling and an analytic hierarchy process(AHP)-cloud model.As the basis for 3D evaluation,a 3D structural model of the study area is established based on the drilling data and geological profiles.Then the structural model is partitioned to obtain interpolation grids,and the ordinary Kriging interpolation method is applied to attribute interpolation.All the attributes are exported from the geological model,and the rock and soil masses are divided into four categories according to their engineering properties,namely soft soil,sandy soil,cohesive soil,and rock,upon which a targeted hierarchy structure is established based on the attributes that impact the suitability.This paper intro-duces the cloud model to characterize the uncertainty of these evaluation indexes,which synthesizes an AHP method,thus it is referred to as the AHP-cloud model.This new model is used to evaluate the geological suitability of underground space in the Sanlong Bay district,Foshan City,Guangdong,China.In addition,we also determine the excavation difficulty at different depths according to the lithology and weathering degree of the study area.The limitations and future directions of the proposed method are discussed,including the influ-encing factors and weight determination.
文摘【目的】随着中国进入后疫情时代,人们对在大型户外空间进行露营、野餐等集体休闲活动愈发热情与向往,构建针对城市综合公园开放共享适宜度的评价体系,可为住房和城乡建设部在全国开展的城市公园绿地开放共享试点工作提供参考。【方法】以北京市中心城区的44个综合公园为例,通过调研量化分析影响综合公园开放共享的主要因素,包括公园可达性、周边兴趣点(point of interest,POI)功能密度、周边POI功能混合度3个外部建成环境指标,以及公园人流量、公园人均绿地空间、可开展活动丰富度3个内部属性指标,并运用熵权TOPSIS模型赋予各指标权重。【结果】综合计算得出各综合公园的开放共享适宜度,其中17个公园适合立即开放共享,22个公园需要延缓开放共享,5个公园暂不适合开放共享。【结论】在多维指标的影响下,公园开放共享适宜度与城市功能分区之间呈现出较强的相关性,公园可达性、公园人均绿地空间2个指标对公园开放共享适宜度影响较大,该结论可为城市公园可持续发展战略的制定提供参考。
基金This research was supported by the National Natural Science Foundation of China(No.51708398)Beiyang Scholar of Tianjin University(2019XRG-0025)the National Key Research and Development Program of China(No.2018YFC0704700).
文摘With a history spanning thousands of years,the water system of Suzhou is an indispensable carrier of urban space and civil culture.Quantificational model analysis of the waterfront in the ancient city of Suzhou has significant implications for the future design of waterfront space and the establishment of an evaluation method to determine the vitality of such space.In this study,a vitality evaluation model was first constructed using river attributes,the spatial type of waterfront areas,vision accessibility,transportation accessibility,and combined new data extracted using spatial factor analysis.Second,a vitality evaluation matrix was established using the analytic hierarchy process to simulate the vitality of waterfront spaces.Third,a hash algorithm was employed to determine the fitting degree between the vitality model of Suzhou’s waterfront space and crowd activity.The different areas between them were found and then the factor evaluation process was adjusted on this basis of analyzing the causes.Thus,this study identified the factors influencing the vitality of Suzhou’s waterfront.Furthermore,this research constructed a model for evaluating the vitality of waterfront spaces.Finally,some guidelines were presented regarding the design and implementation of waterfront spaces in urban design.
