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首页> 外文期刊>The international journal of pavement engineering & asphalt technology >Increased Damage to Uphill Flexible Pavements from 11.22+2.22 Full-trailer Trucks
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Increased Damage to Uphill Flexible Pavements from 11.22+2.22 Full-trailer Trucks

机译：11.22 + 2.22全挂牵引车对上坡柔性路面的损坏增加

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摘要

The damaging effect of trucks is expressed in term of truck equivalency factors. These factors are calculated for the level highway pavements only. This paper a thorough field and theoretical study concerning the increased damage to uphill flexible pavements from 11.22+2.22 full-trailer truck. For this purpose, a set of field surveys were done for both full-trailer truck and uphill pavements. The data obtained from these surveys are axle loads; some geometrical characteristics for full-trailer truck and the range of the uphill slopes in kerbala city. In addition, some of the data of uphill slopes for other Iraqi cities were obtained from previous surveys. Due to axle load redistribution on the uphill slopes, making use of equilibrium equations to determine the axle loads on uphill slopes assuming uniform motion. These axle loads were used to determine the truck equivalency factors. This paper represents the results of the truck equivalency factors as a set of design charts for various uphill slopes, H/B ratio (height of the center of gravity of the truck above the pavement to the length of the wheel base), and structural number for a terminal level of serviceability of 2.5. The results of this work allowed the conclusion that the truck equivalency factors for full-trailer truck type 11.22+2.22 on uphill pavement are much higher than those on level pavement. The effect of uphill slopes should be taken into account in the design of flexible pavement.
机译：卡车的损坏作用以卡车当量系数表示。这些因素仅适用于高速公路路面。本文对11.22 + 2.22全挂牵引车对上坡柔性路面的破坏增加进行了深入的理论研究。为此，对全挂车和上坡路面进行了一系列现场调查。从这些调查中获得的数据是车轴载荷。全挂牵引车的一些几何特征以及喀尔巴拉市的上坡范围。此外，伊拉克其他城市的一些上坡数据是从以前的调查中获得的。由于上坡斜坡上的轴重分布，假设平衡运动，利用平衡方程确定上坡斜坡上的轴重。这些车轴载荷用于确定卡车的等效系数。本文将卡车等效系数的结果表示为一组设计图表，用于各种上坡，H / B比（人行道上方卡车重心的高度到轴距的长度）以及结构号终端的可维护性水平为2.5。这项工作的结果可以得出这样的结论，即上坡路面上的全挂车11.22 + 2.22的货车当量系数远高于平铺路面上的当量系数。在柔性路面的设计中应考虑上坡的影响。

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