Safety Evaluation Of Highway Infrastructure

The highway traffic is growing for years in accordance with the rapid development ofhighway infrastructures in China. The significance of safety of highway infrastructure ishighly considered recently because of the co-effects of the restricted road resources and theincreasing traffics. Highway infrastructure, which refers to the combination of highway,bridges and tunnels in various grades, is the important passage to assure the highway runregularly. Therefore, thesafety is significant. In this thesis, the safety of highwayinfrastructure is evaluated according to the theories of systematic engineering, safetyengineering and fuzzy mathematics.Primarily, based on the various characteristics and facilities of the road, the highwayinfrastructure is classified as common road, bridge, overpass and tunnel due to therequirement of safety design and management. The influencing factors of safety design areanalyzed in the safety of linear, road base and drainage system.The second issue involves the extract of specific index which highly related to safetyof highway infrastructure through the safety effective analysis. Then, every index isdescribed and the index system is established. According to the current national designcriteria, the relevant safety evaluation index and standard is drafted. The weight ofevaluating index is decided through AHP and scores of the experts.Furthermore，variable fuzzy theory is applied in proposing a method of highwayinfrastructure safety evaluation. The relative-membership grade of the index in the systemare calculated and determined. According to the relative membership degree matrix,applying characteristics value formula, an integrated evaluation of highway infrastructuresafety is established.Eventually, Lixin overpass of the second term project of highway fromZengchengshazhuang to Huadubeixing in Guangzhou, is taken as an example to use theachievement of this thesis for safety evaluation.