The Spatial Evolution Of Logistics Enterprises And Storage Facilities In Shenzhen From The Perspective Of Sprawl

Urban logistics space is a space facility and its network supporting urban material flow and goods transportation,including urban logistics enterprise space dominated by economic organization and urban logistics storage facility dominated by physical space.However,At present,due to the rise of land price in the central area,the policy of “suppress the second industry and develop the third industry” and other reasons,a large number of logistics enterprises and logistics storage facilities have to be transferred from urban central areas to urban suburbs,that is,logistics sprawl.But in the existing research on logistics sprawl,the single indicator of sprawl distance is more used and is widely expressed as the suburbanization of facilities or enterprises,lacking the multi-level understanding of the spatial movement.Moreover,logistics enterprise space and logistics storage facility space should be the complementary spaces for mutual support,but few scholars conducted in-depth and meticulous research by combining the two,while most of them opposed the two from a single perspective.Based on this background,the concepts and connotations of urban logistics space and the spread of urban logistics space were redefined first.Urban logistics space consists of logistics enterprise space and storage facility space.The spatial spread of urban logistics is a directional spatial movement,including four characteristics: distance,direction,trend and state of movement.Based on this,the spatial spread of urban logistics is divided into centrifugal discretization,centrifugal agglomeration and centripetal Discretize 3 modes.Taking Shenzhen as a case study,based on the analysis tools such as nuclear density analysis,average center,and standard distance,the spatial distribution and spatial spread characteristics of the two are compared from different time and space scales.Secondly,through the innovative combination of neighbor analysis,point distance and OD methods,the three analysis tools are used to identify the spatially matched and unmatched areas due to the spread of logistics.The research results show that in the continuous time dimension,the logistics space evolution of Shenzhen is not static.The space of logistics enterprises is spreading continuously in the form of shaft belts,and the space of storage facilities is spreading in frog-like patches.Under different spatial dimensions,the evolution of Shenzhen logistics space is not unified.At the municipal scale,the logistics enterprise space gradually changed from discrete to agglomeration,spreading 16.68 km to the west,and the storage facility space gradually changed from agglomeration to discrete,spreading 0.40 km to the east.At the scale of the city area,the two features are multi-polar and polarized,that is,the logistics space spread in the central area develops towards the agglomeration direction,and even evolves into spatial agglomeration.The spread of logistics space outside the central area is mostly manifested as a discrete spread,which leads to the scale of Shenzhen city-level logistics space spreading,rather than the overall logistics space showing a loose spreading structure.At last,the preferences of the types of logistics enterprises and storage facilities in some municipal jurisdictions do not match,so the logistics space spread in the municipal jurisdiction is inefficient and effective.