The Supplement Of Evaluation System Of The Current-existed Bridges

There are more than 7 million bridges are constructed at the end of 2015,which the overall distance is 4.6 billion meters.Besides,there are 3894 grand bridges with 690 million meters.The management of maintenance of bridges is arduous task.In the highway network of China,the number of various types of risk the bridge was 7.9 thousand,accounting for about 10.2% of the total number of bridges,directly affect the safe operation of the road network in China.Although we increase the transformation efforts and reduce the number of the country,provincial trunk bridge,the number of low grade road on the bridge is still high,not fundamentally control and solve the problem of bridge detection.As a result of the basic data support tube work,if we cannot accurately assess the condition of a bridge,it will seriously affect the development and maintenance of the bridge,the bridge technical condition evaluation if only considering the safety of bridge structures.Ignoring the bridge service,service bridge in the transport business only stay in a relatively low level of "smooth" stage.Therefore,it is necessary to do more in-depth research and analysis with the original research,on the bridge technical condition evaluation system of refine and supplement and perfect bridge assessment system,provides more reasonable suggestion for post operation and maintenance of bridge and improve the service bridge.This paper compares the < highway bridge maintenance specification >(JTJ H11-2004).< urban bridge maintenance and technical specification > cjj99-2003.< highway bridge condition assessment standard >(JTG / H21-2011).All these 3 specifications of bridge technical condition assessment system,assessment system for the selection of relatively reasonable,the content is relatively comprehensive and detailed < highway bridge condition assessment standard >(JTG / H21-2011)to further refine and supplement,as follows:1.In the evaluation of < highway bridge condition assessment standard >(JTG / H21-2011)system,the reduced points of bridge disease is heavy,leading to low bridge condition index,the calculation of a large number of combination,it is concluded that the new disease points table,and through the project example and the standard calculation method to verify the new points table is reasonable.2.In the evaluation of < highway bridge condition assessment standard >(JTG / H21-2011)system,no related content of the reinforced bridge technical condition evaluation and the bridge as an example,putting forward the reinforcement part of evaluation index and standard,and the nine grades of importance degree hierarchy analysis method was used to determine the reinforcement member,weights and the evaluation method of the reinforced beam bridge.3.In evaluation of < highway bridge condition assessment standard >(JTG / H21-2011)system,which giving the bridge structure disease evaluation index.The service evaluation index and evaluation system are putting forward.Bridge assessments were used to evaluate the bridge technical kimono provided condition,and through the engineering example to verify the evaluation system of the advance.