Impact of Repeat Overweight Truck Traffic on Buried Utility Facilities
Impact of Repeat Overweight Truck Traffic on Buried Utility Facilities
复制标题
重复超重卡车交通对埋地公用设施的影响
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
E. Fernando
中科院分区：
文献类型：
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作者：
E. Kraus;Jeongho Oh;E. Fernando
超重卡车交通的增加，如德克萨斯州对这类交通发放的许可证迅速增加所表明的那样，往往会加速路面结构完整性的恶化。然而，目前还不太清楚的是，这些超重荷载在多大程度上影响了路权沿线和对面的掩埋公用设施，特别是如果这些设施已经老化或处于德克萨斯州公用设施容纳规则（UAR）的例外情况下。在这项研究中，研究人员评估了埋地管道在重复超重交通荷载作用下的损伤潜力。基于对德克萨斯州公用事业设施技术设计和工程要求的回顾，对聚氯乙烯（PVC）和混凝土管的疲劳行为进行了大型实验室试验研究。静载荷和疲劳载荷试验结果表明，管道垂直直径减小时的变形小于管径的最大允许值5%。然而，即使变形水平非常小，混凝土管也会出现疲劳损伤。基于有限元方法进行了敏感性分析，验证了实验室试验的结果。该研究的结论是，目前的UAR对于重复超重载荷引起的埋地管道疲劳损伤的可能性似乎是足够的。
Increasing overweight truck traffic, as evident by a rapid increase of permits issued for such traffic in Texas, tends to accelerate the deterioration of pavement structural integrity. However, it is less known to what degree buried utility facilities along and across the right-of-way are affected by these overweight loads, especially if these facilities are aged or placed under an exception to the Texas Utility Accommodation Rules (UAR). In this study, researchers evaluated the damage potential of buried pipe subjected to repeat overweight traffic loads. Based on a review of technical design and engineering requirements for utility accommodation in Texas, a large-scale laboratory test was conducted to investigate fatigue behavior of polyvinyl chloride (PVC) and concrete pipe. The result of both static and fatigue load tests indicated that pipe deformation in terms of vertical diameter reduction was less than 5% of pipe diameter, the maximum allowable value. However, fatigue damage was observed for the concrete pipe even though the deformation level was very minimal. A sensitivity analysis based on the finite-element method was conducted to validate the findings of the laboratory test. The study concludes that the current UAR appear adequate with respect to the likelihood of fatigue damage to buried pipes attributable to repeat overweight loads.