Analysis And Research On The Disease Of Active Bridge In Gansu Province

Gansu province is located in the northwest of dry and cold area.By the special natural conditio ns in cold area(water,heat,air and other environmental factors,such as overload)and impact factor s,dry material and structure in the concrete bridge exhibited physicochemical characteristics and conve ntional environment different,formed a specialmaterial,structure deterioration and disaster change mec hanism,bring thegreat challenge for traffic engineering construction and safety operation.In the north west complex area to build bridges,there is no general areacharacteristics,technology the main difficult y is due to a variety of bridge disease analysis research of dry and cold,freezing and thawing cycles caused by.In order to minimize the bridge collapse accident,prolong theservice life of the old bridg e,the bridge construction to reduce costs,disease mechanism must be a careful analysis of the Gans u area of the bridge,provenance studies treat disease measures,summed up the repairmethod,the corre sponding reinforcement.According to the special geographical environment of Gansu Province,study on forming mechanism of active disease of bridges in special climate conditions,can for the construc tion of bridge,construction,use and repairafter strengthening support reliable.This paper takes Gansu province bridge(especially reinforced concrete bridge diseases)as the e ngineering background,the area of bridge disease,disease mechanism and bridge maintenance are studie d and analyzed,the specific contents are as follows:1.Based on domestic and overseas research on bridge disease progress andsignificance of diseas e research,clear the necessity of research of bridgedisease on the special climate conditions of Gans u province.2.The typical bridge operation environment of Gansu Province,special geographical environmen t and climate conditions were investigated.3.The main diseases of the special climate conditions of Gansu provincebridge were statistically compared meticulous and finishing,mainly on concrete bridge superstructure,substyucture and differe nt parts of bearingdiseases were analyzed and studied.4.According to the diseases of the bridge appearance examination and role of environmental an alysis of the reason,cause disease of generation mechanism and its diseases were analyzed and studie d.5.Combining the development of bridge maintenance technology,according to the specific situat ion of Gansu Province,the disease of active bridge,puts forward the concrete implementation schem e of bridge maintenance,afterbridge technical condition evaluation,classified bridge repair reinforceme ntand preventive maintenance work.