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摘要: 为了分析路面平整度功率谱法(PSD) 和国际平整度指数法(IRI) 之间的关系, 采用AR模型模拟满足路面平整度功率谱的路面不平整状态, 采用Newmark β法计算国际平整度指数, 采用最小二乘法得到了PSD法与IRI法之间的关系方程式。研究结果表明: IRI值与路面平度系数的关系为幂函数式, 为了与《公路工程质量检验评定标准》 (JTGF80/1-2004) 所规定的IRI值相对应, 建议在《公路养护技术规范》 (JTJ073-96) 的路面平整度评定等级中增加“极优”项目。Abstract: In order to analyze the relationship between power spectral density (PSD) method and international roughness index (IRI) method in evaluating road roughness, AR model was adopted to simulate road roughness condition for satisfying PSD, and Newmark β method was employed to calculate IRI values, the relationship formula between PSD method and IRI method was determined by using least square method. Analysis result shows that the relationship between IRI value and road roughness coefficient meets power function, and to correspond to IRI values in quality inspection and evaluation standards for highway engineering (JTG F80/1-2004), a "very good" item of road roughness evaluation should be complemented into technical specifications of maintenance for highway (JTJ 073-96).
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表 1 路面平整度系数
Table 1. Road roughness coefficients
mm2·m 路面等级 下限 几何平均 上限 A 8 16 32 B 32 64 128 C 128 256 512 D 512 1 024 2 048 E 2 048 4 096 8 192 F 8 192 16 384 32 768 G 32 768 65 536 131 072 H 131 072 262 144 524 288 表 2 路面平整度评价RRQI值
Table 2. RRQI values of road roughness evaluation
优 良 中 次 差 ≥8.5 7.0~8.5 5.5~7.0 4.0~5.5 < 4.0 表 3 回归分析结果
Table 3. Result of regression analysis
K C1 C2 C3 C4 C5 C6 C7 C8 R2/% 1 0.6 -0.051 -0.230 45.28 2 0.6 0.107 -0.389 -0.542 83.42 3 0.6 0.031 -0.691 -0.360 0.599 96.85 4 0.6 -0.015 -0.594 0.089 0.493 -0.534 99.13 5 0.6 -0.004 -0.462 0.012 -0.135 -0.488 0.584 99.74 6 0.6 0.009 -0.495 -0.256 -0.042 0.347 0.554 -0.639 99.93 表 4 GB/T 7031-1986对应的IIRI值
Table 4. IIRI values according to GB/T 7031-1986
m·km-1 路面等级 下限 几何平均 上限 A 1.70 2.40 3.39 B 3.39 4.80 6.79 C 6.79 9.60 13.58 D 13.58 19.20 27.15 表 5 JTJ 073-96对应的Sq (n0) 值
Table 5. Sq (n0) values according to JTJ 073-96
路面等级 RRQI IIRI/ (m·km-1) Sq (n0) / (mm2·m) 上限 下限 下限 上限 下限 上限 优 — 8.5 — 4.00 — 44.4 良 8.5 7.0 4.00 6.00 44.4 100.0 中 7.0 5.5 6.00 8.00 100.0 177.8 次 5.5 4.0 8.00 10.00 177.8 277.8 差 4.0 — 10.00 — 277.8 — 表 6 路面平整度评价建议值
Table 6. Proposed values of road roughness evaluation
路面等级 IIRI/ (m·km-1) Sq (n0) / (mm2·m) 下限 上限 下限 上限 A (极优) — 2.00 — 11.1 B (优) 2.00 4.00 11.1 44.4 C (良) 4.00 6.00 44.4 100.0 D (中) 6.00 8.00 100.0 177.8 E (次) 8.00 10.00 177.8 277.8 F (差) 10.00 — 277.8 — -
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