Research On Safety Analysis And Security Technology Of Highway Curved Bridge Based On Cross Section

As a typical mutation of road environment,the driving safety of the curved bridge is not optimistic.Curved bridge section has great difference with other section in both road alignment and road environment.Therefore,curve bridge safety is the shortage of whole road,increasing the safety of the curved bridge can greatly improve the safety of the whole road,so the highway curve bridge safety evaluation and security technology is very important.By introducing the influence of curve bridge line,profile and cross section,the stadia and structure on the safety of road,paper analyze various factors that affect accidents rate to determine that the curved bridge cross section layout and the way of curve segment widening has important influence on traffic safety,then the curve bridge cross section layout and the way of curve segment widening was chosen to be the research direction.First of all,paper analyzes traditional highway curve bridge cross section geometrical arrangement and the way of curve segment widening,concludes the hidden safety troubles.Secondly,paper establishes the curve bridge safety coefficient of regression model and recommended two kinds of arrangement of curve bridge cross section on the basis of effective width;By researching on the influence of curve bridge geometric parameters on the driving mechanism and regularity of trajectory behavior,paper sets up value calculation and way of different radius of curved bridge widening based on the running speed and fully consider driving behavior character,and puts forward the level of highway bridge in the small radius curve widen design guidelines.Finally,on the basis of study on speed discreteness impact on the traffic safety on the installation of curve bridge climbing lane conditions,setting method and the set of climbing lane sign and marking are researched and the driveway edge line,lane to the separation line and the size of the vibrating belt are given.