摘要
合理铺设滑动层能够有效减小斜向预应力水泥路面板内温度应力及路面板端伸缩位移,大幅延长斜向预应力水泥路面单块板的划分长度,提高路面平整性和舒适性,同时降低轮胎/路面噪音,延长路面使用寿命。文章依据Amonton定律设计研发了斜向预应力水泥路面滑动层摩擦系数测试仪(CFT),可以快速、准确地测量斜向预应力水泥路面滑动层摩擦系数;并基于CFT,对斜向预应力水泥路面"砂层+聚乙烯塑料薄膜"(SPF)和"砂层+水泥+聚乙烯塑料薄膜"(SCPF)型滑动层进行了详细的试验研究,得到了测试速度与滑动层摩擦系数之间的影响关系,给出了CFT最佳的测试速度为1mm/min;同时得出了斜向预应力水泥路面滑动层最佳的结构参数和结构类型为10mm的滑动层厚度、细度模数2.6的中砂以及规格为3μm的单层聚乙烯塑料薄膜,SCPF型滑动层最佳的水泥掺量为3%。
Sliding layer can decrease the stress and deformation of cross-tensioned prestressed concrete pavement（CTCP） caused by temperature. Therefore, it is possible to make longer CTCP slab which is more com- fortable, quieter and can prolong the pavement life. In this paper, a coefficient of friction tester（CFT） is developed for CTCP sliding layer according to the Amonton prindple, which can accurately and quickly measure the eoeffident of friction of CTCP sliding layer. Based on the CFT, two types of CTCP sliding layer, sand＋ polyethylene plastic film（SPF） and sand＋cement＋polyethylene plastic film（SCPF）, are studied. The relationship between the testing speed and the coefficient of friction of sliding layer is gotten and the best testing speed for CFT is 1 mm/rain. The optimal structure parameters of GTCP sliding layer are as follows： thickness of sliding layer of 10 mm, sand fineness modulus of 2. 6 and one-layer polyethylene plastic film of 3μm. Meanwhile, the optimal cement content is 3% for SCPF sliding layer of CTCP.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2015年第2期213-218,共6页
Journal of Hefei University of Technology：Natural Science
基金
交通运输部西部课题资助项目(2011318793650)
关键词
道路工程
斜向预应力水泥路面
滑动层
摩擦系数
结构参数
highway engineering
cross-tensioned prestressed concrete pavement（CTCP）
sliding layer
coefficient of friction
structure parameter
