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针对干线公路上行驶的大型汽车和重型汽车数量的增加,对公路桥梁造成的损害不断加剧,不仅增加了桥梁的维护成本,也造成了干线公路通行能力和服务水平降低的问题。选取对桥梁结构有较大影响的车辆轴重,在河南省高速公路主线收费站通过对大型货车轴重进行调查统计,利用核估计法建立了干线公路车辆轴重统计模型。分析结果表明,目前干线公路以大型、重型货车为主的公路荷载已经远远超出了公路荷载标准上限值,需要根据现有的车流状况计算干线公路桥梁结构承载力及可靠性,并制订符合实际的地方性荷载标准作为国家标准的补充。
The increase of the number of large-scale cars and heavy-duty vehicles driving on the trunk road has aggravated the damage caused to the bridges and bridges, which not only increases the maintenance cost of the bridges, but also reduces the capacity and service level of trunk roads. Based on the axle load of the large truck, the axle load of the main highway in Henan Province is selected and the axle load of the main highway is established by using the kernel estimation method. The analysis shows that the load of the main trunk highway on the main highway is larger than the upper limit of the highway load standard, and the bearing capacity and reliability of the main highway bridge should be calculated according to the existing traffic flow conditions. The actual local load standard complements the national standard.