沥青路面水泥稳定碎石基层抗冲刷性能影响因素试验分析
Experimental Analysis of Influencing Factors on Anti-erosion Performance of Cement Stabilized Macadam Base for Asphalt Pavement
作者：郭瑞(陕西理工大学 土木工程与建筑学院, 陕西 汉中 723001)；杨晓娟(国家知识产权局专利局 专利审查协作北京中心, 北京 100160)；蒋红(陕西理工大学 土木工程与建筑学院, 陕西 汉中 723001)；刘冲(西安公路研究院, 陕西 西安 710064)
Author：GUO Rui(School of Civil Eng. and Architecture, Shaanxi Univ. of Technol., Hanzhong 723001, China)；YANG Xiaojuan(Beijing Center of Patent Examination of the State Intellectual Property Office, Beijing 100160, China)；JIANG Hong(School of Civil Eng. and Architecture, Shaanxi Univ. of Technol., Hanzhong 723001, China)；LIU Chong(Xi'an Highway Inst., Xi'an 710065, China)
收稿日期：2018-03-03 年卷（期）页码：2019,51(2):78-84
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：道路工程;抗冲刷性能;模型试验;水泥稳定碎石基层;影响因素
Key words：road engineering;anti-erosion performance;model experiments;cement stabilized macadam base;influencing factors
基金项目：国家自然科学基金青年基金资助项目（11702163）；陕西理工大学人才启动项目资助（SLGQD16-11）
中文摘要
路面面层与基层界面之间积存的自由水因压力变化而高速流动并产生泵吸效应，将冲刷基层导致路面面层损坏。为分析不同结构类型水泥稳定碎石半刚性基层抗冲刷性能及其影响因素，结合秦巴山区宝汉高速公路工程实例，通过室内抗冲刷模型试验对悬浮密实型、骨架密实型及骨架空隙型3种典型结构水泥稳定碎石半刚性基层材料抗冲刷性能的影响因素、变化规律及机理进行了研究。结果表明：随着水泥胶结料含量和强度等级、养生龄期等增加，3种类型水泥稳定碎石半刚性基层的抗冲刷性能均随之提高；含水量和压实度过高或过低均不利于水泥稳定碎石半刚性基层抗冲刷性能提高，实际工程中应严格控制混合料中含水量和压实度；水泥稳定碎石基层混合料的抗冲刷性能受结构类型影响较大，鉴于工程实际情况建议优先采用骨架密实型结构。
英文摘要
The free water accumulated at the contact surface between pavement and subgrade appears to flow at high speed and form pumping effect due to variation of air pressure, which results in scouring subgrade and damaging pavement. In order to treat this problem, the influencing factors, the change law and mechanism of the anti-erosion performance of three typical cement concrete semi-rigid base materials (suspended dense structure, skeleton dense structure, skeleton-gap structure) were systematically analyzed by indoor scouring experiments and the project example of Baohan highway in Qinba mountain area. The result showed that the anti-erosion performance of the three semi-rigid bases was increased with the increase of cement content and strength grade, and curing time. It was unfavorable to improve anti-erosion performance of the semi-rigid bases when the water content and compaction were too high or too low, so that the water content and compactness were strictly control in practical engineering. The erosion resistance of the semi-rigid bases was greatly affected by its structural type. In view of the actual situation of the project, it was suggested that the skeleton dense structure should be adopted preferentially by the engineers.
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