基于足尺试验的机场沥青道面轮辙发展与预测

李岳; 刘文俊; 蔡靖; 赵夫朋

doi:10.3969/j.issn.0258-2724.20210606

基于足尺试验的机场沥青道面轮辙发展与预测

doi: 10.3969/j.issn.0258-2724.20210606

李岳^1,,
刘文俊¹,
蔡靖^1, ,,
赵夫朋²

1.
中国民航大学交通科学与工程学院，天津 300300
2.
滨州市交通运输事业服务中心，山东滨州 256600

基金项目: 中央高校基本科研业务费专项资金（3122019103）；天津市教委科研计划（2020KJ021）；天津市研究生科研创新项目（2021YJSS133）

详细信息

作者简介:
李岳（1984―），男，副教授，研究方向为机场工程与场道工程，E-mail：leoliyue@163.com

通讯作者:
蔡靖（1975―），女，教授，研究方向为机场工程与场道工程，E-mail：jcai@cauc.edu.cn

中图分类号: U416.217；V351.11
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- 文章访问数: 362
- HTML全文浏览量: 108
- PDF下载量: 35
- 被引次数: 0
出版历程
- 收稿日期: 2021-07-27
- 修回日期: 2022-02-25
- 网络出版日期: 2023-05-13
- 刊出日期: 2022-03-05

Development and Prediction of Ruts in Airport Asphalt Pavement Based on Full-Scale Test

LI Yue^1
,,
LIU Wenjun¹,
CAI Jing^{1
, ,},
ZHAO Fupeng²

1.
School of Transportation Science and Engineering, Civil Aviation University of China, Tianjin 300300, China
2.
Transportation Service Center of Binzhou, Binzhou 256600, China

摘要

摘要:
轮辙是引起沥青道面过早破坏的重要因素，飞机地面滑行渠化交通显著，由轮辙病害引起的道面平整度与舒适性问题突出. 为此，建立飞机轮组-地基-沥青道面结构体系仿真分析模型，提出适应轮组荷载特征的等效循环加载方式，依托NAPTF （National Airport Pavement Test Facility）足尺沥青道面轮辙试验，验证仿真结果的适用性与可靠性，并开展加载时间间隔与环境温度等多因素分析. 研究结果表明：考虑轮载作用横向偏移效应，轮辙总宽度达到轮组宽度的3倍，轮辙断面曲线有多处转折点与以往单一凹陷面特征明显不同；循环加载时间间隔对轮辙发展影响显著，经过150 s间隔后沥青面层回弹变形趋于稳定，可兼顾分析效率需要；前10%循环加载次数对轮辙变形的贡献超过40.4%，可基于初始轮辙建立指数型轮辙发展预测公式，对循环加载全过程拟合度高于96.4%，轮辙分析效率有明显提高.
- 道路工程 /
- 道面轮辙 /
- 沥青道面 /
- 轮辙试验 /
- 加载波形 /
- 循环加载
Abstract:
Ruts can be one of the key reasons for early damage of asphalt pavement. Due to the channelized traffic characteristics of aircraft taxiing, the evenness and comfort of airport pavement are notably affected by rut damage. In this paper, a simulation analysis model of aircraft landing gears-foundation-asphalt pavement system is established. An equivalent cyclical loading process is proposed according to the loading characteristic of landing gears. The feasibility and reliability of the simulation model are verified by the rut test result of full-scale asphalt pavement conducted by National Airport Pavement Test Facility (NAPTF). Factors such as the loading interval and environment temperature are then analyzed. The results show that due to lateral shift effect of landing gear load, the total width of the ruts reaches 3 times the width of the landing gears, and the rut section curve has many turning points, which is obviously different from those of the previous single concave surface. The cyclical loading interval has a remarkable influence on rut development. The rebound deformation of the asphalt surface course becomes stable after a loading interval of 150 s, which can meet the requirement of analysis efficiency. Since the first 10% number of cyclical loading contributes more than 40.4% of overall rut deformation, an exponential rut deformation prediction formula is derived based on initial ruts. The goodness of fit result during the whole cyclical loading process is over 96.4%, and the efficiency of rut analysis is dramatically increased.
- road engineering /
- pavement ruts /
- asphalt pavement /
- rut test /
- loading waveform /
- cyclic loading

HTML全文

图 1 CC5试验沥青道面及加载测试车

Figure 1. Asphalt pavement of CC5 test and loading vehicle

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图 2 加载路径横向分布与加载顺序

Figure 2. Translational distribution of wheel track and loading sequence

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图 3 有限元模型体系三维视图（单位：m）

Figure 3. 3D graph of FEM model system（unit: m）

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图 4 轮组加载等效关系

Figure 4. Equivalent relation of wheel set loading

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图 5 飞机轮组等效加载曲线

Figure 5. Equivalent loading curve of aircraft wheel loads

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图 6 回弹变形随加载时间间隔变化曲线

Figure 6. Variation curves of rebound deformation versus loading interval

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图 7 轮辙横断面特征比较

Figure 7. Comparison of section characteristics of rutting deformation

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图 8 CC5试验轮辙深度增长曲线

Figure 8. Curves of rutting depth of CC5 test

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图 9 轮辙增长率及各阶段贡献率曲线

Figure 9. Curves of rutting growth ratio and contribution rate at different stages

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图 10 初始阶段轮辙公式拟合结果

Figure 10. Fitting formula results of rutting at initial stage

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图 11 不同温度下的轮辙公式预测结果

Figure 11. Predication results of rutting formula under different temperatures

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表 1 道面结构层组成

Table 1. Consisting of pavement structure

结构层	材料编号	结构层厚度/mm
结构层	材料编号	LFC1-NW	LFC2-NE
沥青混凝土面层	P-401	127.0	127.0
密级配碎石基层	P-209	203.0	203.0
碎石底基层	P-154	863.6	965.2
低强度土基	DPC	762.0	762.0
注：道面各结构层厚度由FAARFIELD软件计算.

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表 2 循环加载参数

Table 2. Parameters of accumulative loading

轮载等级/kN	累积作用次数/次
226.75	0～7920
263.03	7921～13038
294.78	13039～18612
317.51	18613～27918

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表 3 加载测试车参数

Table 3. Parameters of loading vehicle

性能指标	参数取值
轮印宽度/cm	30.5
轮印长度/cm	53.3
机轮数量/个	6
轮胎胎压/kPa	1670
横向轮隙宽度/cm	106.5
纵向轮隙长度/cm	91.7

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表 4 沥青混凝土面层材料参数^[25]

Table 4. Material parameters of asphalt surface course^[25]

温度/℃	瞬态模量/ MPa	泊松比	f	n	m
20	870	0.25	6.54 × 10⁻¹¹	0.937	−0.592
30	620	0.30	3.33 × 10⁻⁹	0.862	−0.587
40	554	0.35	1.45 × 10⁻⁸	0.792	−0.577
50	530	0.40	1.39 × 10⁻⁶	0.414	−0.525
注：f、n、m均为蠕变模型参数，均采用国际单位1，无量纲.

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表 5 基层及底基层材料参数^[26]

Table 5. Material parameters of base course and subbase course^[26]

材料类型	弹性模量/MPa	泊松比
密级配碎石基层	518	0.35
碎石底基层	276	0.35

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表 6 轮辙曲线特征点结果

Table 6. Results at feature points of rutting curve mm

特征点	断面中心距		轮辙深度
特征点	试验	仿真	试验	仿真
R₁	0.025	0	−172.4	−170.2
R₂	0.500	−0.505	−150.4	−140.4
R₃	0.899	−0.892	−121.8	−130.9
R₄	−1.125	−1.133	−101.9	−105.0

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表 7 不同温度下公式系数

Table 7. Fomula coefficients under different temperatures

温度/℃	r	p	q	ρ
30	24.359	0.0035	24.077	0.998
40	32.832	0.0038	31.471	0.998
50	37.349	0.0052	35.033	0.997
CC5 试验	30.481	0.0033	29.570	0.998

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