桥头坡度对路面平整度的影响

Relationship between Longitudinal Curve of the Bridge Head and International Roughness Index

为了分析高速公路桥头纵曲线线形对路面的国际平整度指数的影响,通过对理论模型的讨论和某高速公路的实际检测数据的分析,得到平整度指数对不同桥头纵曲线的反应。研究结果表明:由路面驶向桥面时桥头搭板处纵曲线变化与IRI值有一定相关性,且存在坡度越陡,IRI值越大的大致关系;而从桥面向路面行驶时,桥头搭板处的纵曲线变化与相应路段的IRI没有显著关系。

In order to study the relationship between longitudinal curve of the bridge head and the IRI （ international roughness index） of the corresponding sections, theoretical analyses of quarter car mod- el of IRI and in-site test were conducted to obtain the relationship relationship between longitudinal curve of the bridge head and IRI . The resuhs show ： in the direction that driving from the road to the bridge, the longitudinal curve of the bridge head are somewhat correlated with IRI, and IRI chiefly increases with the rise of slope gradient; in the other direction, the longitudinal curve of the bridge head has no significant relation with the IRI.