Based On The Theory Of Urban Disaster Prevention And Mitigation Of Urban Construction Management Research

City has been undergoing thousands-year evolution since it came into being,and it has changed people's living style and the social organization structure.Initially,city,when small-sized and low at urbanization level,evolved slowly,coupled by the limit of economy,and it generated limited effect on the natural environment.Since the industry revolution,city has developed into industry manufacturing center and expanded rapidly,achieving the rise in urbanization.The extent of people making use of natural resources has been tremendously improved as a result of industrial development, enhanced centralization of industry and population,and the process of urbanization across the world started.China,a developing country,is currently experiencing the stage of rapidly-increasing urbanization.On the one hand,a growing number of people migrate to the city,with city-based economy,culture and technology being significantly improved,while the urban infrastructure has been more sophisticated and people living situations also greatly improved.On the other hand,the advance of science and technology has given birth to high strength materials,offering material foundation for high-level and high-rise buildings,which can be universally seen.New buildings with glass curtain walls,tent structure and membrane structure come into people' seyes.The invention of refrigerant and heat pump,and the progress of automatic technology fill people with great passion about artificial environment.Excessive urbanization results in the disappearance of countryside surrounding the city,with countryside houses encircled by the cities,dubbed as "Village in the City" Huge flow of people and logistics have exerted unbearable pressure on the transportation network and led to the short of gasoline supply and air pollution.fireclay bricks production for large-scale construction have reduced the size of rice paddy and hills,breaking the ecological balance and posing threat to the survival of human being.Despite cement products taking the place of fireclay bricks by national farming land protection policy of Fireclay Bricks Limit and Fireclay Bricks Ban,the sound and thermal bridges have increased the energy consumption.Economic globalization has realized the trans-region and cross-border exchange of technology,fund and resources,generating enormous incentives for the fast urban development and construction.The increasing wealth and growing power of science and technology have changed people into self-centered pioneer and people indulge into building artificial environment on the basis of high consumption of energy.Taking the necessary endlessly from the nature and returning the wastes carelessly to the nature,man is faced with the short supply of land,mineral resources,coal,electricity,water and energy,and the deterioration of ecological balance and vegetation.Natural disasters,worsening urban environment,more urban problems have become more apparent.Against the above-mentioned backdrop,this paper,based upon such disaster evidences as September 11,Hurricane Katrina in New Orieans and so on,introduces the viewpoint that man should review the plan of conquering and changing the nature,stressing the hidden dangers should be eliminated by employing the disaster prevention and reduction management,and the vulnerability of city should be altered,and the disaster resistance capability be advanced.Employing the system engineering theory and methods,integrating catastrophology theory,based on the research on the management of disaster prevention and reduction in urban construction during the whole process of life cycle of the city involving city planning,city construction and management,this paper introduces the model and methods of "disaster-prevention-and-reduction-based urban construction management" through lesson-learning,summarizing and induction. Personal viewpoints on such heatedly-debated issues as urban waste processing,rebuilding of village in the city,saving energy in construction,and safety of construction material are presented.New conceptions like energy right,emission right,and urban disaster recovery capability are initially used in this research and it is proposed that city development and construction should be limited by the city disaster recovery capability,and urban appropriate scale should be controlled by energy right,emission right and other market-oriented economic means.Deeper research on disaster prevention and reduction management in the urban construction will be carried out in the future due to limited time.