Study On The Resilience Design Of The Spatial Pattern Of Hybrid Blocks In The Context Of Public Health Emergencies

In recent years,the frequent outbreaks of various major infectious diseases have brought severe survival challenges to urban planning,community construction,and residents’ lives.Although the current round of COVID-19 infection in China has basically ended by February 2023,the pandemic of public health events still exists globally.Among them,hybrid neighborhoods characterized by dense settlements and frequent population movements are particularly vulnerable to public health crises due to a series of urban ills caused by their long history of construction,weak infrastructure,and backward technological means.Therefore,it is necessary for us to focus on the spatial pattern of hybrid neighborhoods for proactive prevention and control,and to shift towards prevention and control.As the smallest operating unit in the urban planning and management system,the stability and adaptability of hybrid blocks are related to the safety and sustainable development of the entire city.However,the renovation of existing hybrid neighborhoods mostly focuses on improving spatial quality,improving infrastructure,optimizing indoor and outdoor environments,and other aspects.However,due to insufficient consideration of emergency construction of spatial models,hybrid neighborhoods are extremely fragile in the face of unknown risks,unable to provide safe and effective living space for residents,which to some extent exposes the shortcomings of self-organization in epidemic prevention and control.Therefore,we have reason to believe that the epidemic is both a "crisis" and an "opportunity" for reflection.How to build a safe and healthy emergency system in the future,achieve rapid space conversion and resource allocation in a "pandemic" manner,and make hybrid neighborhoods more leisurely respond to similar public health emergencies has become a key issue to be urgently resolved in urban renewal and construction.This article takes public health emergencies as the research background,takes Hanzheng Street hybrid blocks as the research object,and follows the technical research route of "asking questions-theoretical research-analyzing questions-strategic exploration-case verification" to explore the practical application of resilience transformation in hybrid blocks.Firstly,based on a review of domestic and foreign literature,the concept of hybrid neighborhoods is defined,and the characteristics of their morphological evolution are explored.Combined with the background of the recently subsided epidemic,the necessity of resilience renewal in hybrid neighborhoods was analyzed in view of the common problems existing in them.On this basis,the "resilience theory" is introduced to construct resilience indicator elements and model mechanisms to adapt to public health emergencies;Secondly,placing the research object in the context of public health emergencies,this paper summarizes the spatial and hybrid characteristics of Hanzheng Street in Wuhan from the perspectives of historical context,architectural form,population structure,street activities,and other aspects.It also considers the current situation of hybrid neighborhoods from the four aspects of resilience indicators,namely,planning,environment,transportation,and service,and interprets the current spatial resilience needs of hybrid neighborhoods from multiple perspectives.Accordingly,corresponding design principles and "epidemic prevention" conversion mechanisms are proposed to explore universal strategies for the spatial resilience transformation of hybrid neighborhoods in the context of public health emergencies.Finally,based on the design goals of Hanzheng Street,and based on the updated ideas of the resilience system,the design practice exploration of Hanzheng Street is carried out from four aspects: block planning,human settlements,traffic flow lines,and service architecture.