检查井及井周路面影响下的车辆荷载动态特性

doi:10.3969/j.issn.1674-0696.2023.07.09

摘要/Abstract

摘要： 为分析车辆经过检查井及井周路面时的车辆荷载动态特性，采用井周路面病害调查的方法确定了井周路面病害类型及范围；考虑井盖的变形和振动，建立了车-井盖耦合多自由度振动模型；分析了车辆荷载冲击系数随时间变化的规律及影响因素。研究结果表明：在检查井及井周路面平整度激励作用下，车辆由井周路面驶入正常路面时车辆荷载冲击系数达到最大值，此时车辆荷载为静载的1.35倍；各因素对车辆荷载动态特性影响程度从大到小排序为：井周路面病害导致的高差＞检查井沉陷量＞坡度变化率＞行车速度＞井盖刚度系数。由此可见，车辆经过检查井及井周路面时路面的平整度大小是(井周路面病害导致的高差、检查井沉陷量和坡度变化率)导致车辆荷载冲击效应是否显著的原因，也是井周路面频频破坏的主要因素之一。

关键词: 道路工程；检查井；振动模型；荷载冲击系数；车辆荷载动态特性

Abstract: In order to analyze the dynamic characteristics of truck load when passing the manhole and its surrounding pavement surfaces, the type and scope of pavement disease around manholes were determined by the investigation of pavement disease around manholes. Considering the deformation and vibration of manhole cover, the multi-degree-of-freedom vibration model of truck-manhole cover coupling was established, and the variation rules and influencing factors of truck load impact coefficient changing with time were analyzed. The research results show that under the excitation of the smoothness of the manhole and the pavement around manholes, the load impact coefficient of the truck reaches its maximum value when the truck drives from the pavement around manholes into the normal pavement, and the truck load is 1.35 times as large as the static load. The degree of influence of various factors on the dynamic characteristics of truck load is ranked in descending order: the height difference caused by pavement surface diseases around the manhole is greater than the settlement of the manhole, the rate of slope change, the driving speed, and the stiffness coefficient of the manhole cover. Therefore, the smoothness of the pavement surface when the truck passes the manhole and its surrounding pavement surface is the reason for whether the impact effect of truck load is significant, and it is also one of the main factors causing frequent damage to the manhole surrounding pavement surface.

Key words: highway engineering; manhole; vibration model; load impact coefficient; truck load dynamic characteristics

中图分类号:

U416.2

赵全满1,2，王鑫均1，卢晓锦1，刘继法3，胡文军1. 检查井及井周路面影响下的车辆荷载动态特性[J]. 重庆交通大学学报（自然科学版）, 2023, 42(7): 60-68.

ZHAO Quanman1,2, WANG Xinjun1, LU Xiaojin1, LIU Jifa3, HU Wenjun1. Dynamic Characteristics of Truck Load Influenced by Manholes and Pavement around Manholes[J]. Journal of Chongqing Jiaotong University(Natural Science), 2023, 42(7): 60-68.

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