因高速公路上路基和桥梁所处的交通环境不同,发生交通事故后的危险程度也不一样,故护栏设置的等级也不一样.路基段中央分隔带混凝土护栏一般以 Am 级和 SBm 级为主,桥梁路段以 SAm 级和 SSm 级为主,总体而言,一般桥梁护栏等级比路基护栏等级高,不同等级的护栏截面尺寸存在较大的差异.为了降低车辆发生事故碰撞中央分隔带护栏驶入对向车道的风险,提出了一种中央分隔带桥梁段与路基段钢筋混凝土护栏衔接过渡的优化处理方案.
An Optimized Scheme for Transition of End Connection of Guardrail in Bridge Central Divider
Due to different traffic environments in which roadbed and bridges on highways are located,the danger level of a traffic accident also varies,so the grade of guardrails installed also differs.The concrete guardrails for the central divider of roadbed section are generally of Am and SBm grades,while the bridge section is mainly of SAm and SSm grades.The grade of bridge guardrails is generally higher than that of roadbed guardrails,and there are significant differences in the cross-sectional dimensions of guardrails of different grades.Aiming at reducing the risk of vehicle invasion into opposite lanes when a bridge encounters an accident,this paper proposes an optimization scheme for bridge-roadbed transition of reinforced concrete guardrail with respect to the central divider.
central median guardrailcrash barrierreinforced concrete guardrailtransition and connectionend of guardrail
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