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摘要: 通过对三条在建高速公路沥青路面渗水系数的测试, 分析得出沥青路面渗水性能与沥青混合料的类型、路面现场空隙率、结构层厚度及路面表面构造深度有关。测试结果统计分析表明相同空隙率下, 粗级配的混合料更易渗水; 相同级配下, 路面现场空隙率越大, 表面构造深度越大, 路面越易渗水; 路面渗水系数随路面厚度的增加而减少; 建议沥青路面渗水系数应作为高速公路施工中一项质量控制指标, 并初步提出控制标准的建议值。Abstract: Permeability test was done at three expressways in 2001. Based on the test data, it is concluded that permeability of asphalt pavement is affected by mixture type, in place air void, thickness of layer and surface structure; coarse mixture is more permeable to water than dense one with the same in place air void. Increasing in place air void and surface structure can cause larger permeability; thicker pavement is less permeable to water; permeability should be worked as a quality control index, and a suggested control value is given based on the statistical analysis.
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Key words:
- road engineering /
- asphalt pavement /
- permeability /
- mixture type /
- in place air void /
- surface structure /
- thickness
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图 2 三条高速公路AK13A渗水系数与空隙率的关系
Figure 2. Permeability coefficient vs in place air void of AK13A at three highways
图 4 Superpave20渗水系数与空隙率的关系
Figure 4. Permeability coefficient vs in place air void of Superpave20
图 5 Superpave25渗水系数与空隙率的关系
Figure 5. Permeability coefficient vs in place air void of Superpave25
图 6 AC20I渗水系数与构造深度的关系
Figure 6. Permeability coefficient vs surface structure of AC20I
图 7 Superpave20渗水系数与构造深度的关系
Figure 7. Permeability coefficient vs surface structure of Superpave20
图 8 徐州某标AC20I渗水系数分布
Figure 8. Scatter of permeability coefficient of AC20I for a project in Xuzhou
图 9 徐州某标Superpave20渗水系数分布
Figure 9. Scatter of permeability coefficient of Superpave20 for a project in Xuzhou
表 1 AK13A上面层渗水系数统计
Table 1. Permeability coefficient statistics of AK13A
渗水系数/ml·min-1 满足条件的点数 比例/% > 10 25 67.57 > 20 16 43.24 > 40 8 21.62 > 60 7 18.92 > 80 6 16.22 > 100 4 10.81 > 150 2 5.41 > 200 2 5.41 总数 37 100% 注: 2001年度上面层AK13A的现场空隙率要求为3%~7%, 表 1中统计时去掉了空隙率大于7%的数据。 
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表 2 AC20I中面层渗水系数统计
Table 2. Permeability coefficient statistics of AC20I
渗水系数/ml·min-1 满足条件的点数 比例/% > 20 27 28.72 > 40 22 23.40 > 60 18 19.15 > 80 12 12.77 > 100 9 9.57 > 200 4 4.26 总数 94 100%
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[1] 沙庆林. 沥青路面早期破坏现象及预防[M]. 北京: 人民交通出版社, 2001. [2] JTJ059-95, 公路路基路面现场测试规程[S]. [3] Cooley L A. Permeability of Superpave mixtures: evaluation of field permeameters[R]. NCAT Report No. 99-1, 1999. [4] Cooley L A, Brown E R, Maghsoodloo S. Development of critical field permeability and pavement density values for coarse-graded Superpave pavements[R]. NCAT Report No. 01-03, 2001. [5] 张全庚, 贾渝. 对我国当前沥青路面技术标准的若干看法[J]. 华东公路, 1999, 22 (4): 28—35.ZHANG Quan-geng, JIA Yu. Discussion on current specifica- tion of asphalt pavement[J]. Highway of East China, 1999, 22 (4): 28-35. (in Chinese) [6] 贾渝, 张全庚. 沥青路面结构层厚度与沥青混合料类型选择[J]. 公路, 2000, 45 (3): 10—13. https://www.cnki.com.cn/Article/CJFDTOTAL-GLGL200003004.htmJIA Yu, ZHANG Quan-geng. Selection of asphalt pavement thickness and HMA type[J]. Highway, 2000, 45(3): 10-13. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GLGL200003004.htm [7] JTJ032-94, 公路沥青路面施工技术规范[S]. [8] The Asphalt Institute. Superpave Mix Design (SP-2)[M]. The Asphalt Institute, Lexington, Kentucky, 2001. -
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