农牧区水泥混凝土路面沥青加铺层层间处治技术研究

发布时间：2018-06-13 00:22

本文选题：沥青加铺面层 + 旧路改造　；参考：《内蒙古农业大学》2017年硕士论文

【摘要】：沥青混合料路面由于其使用性能、环保等原因应用范围越来越广,不仅在新建道路中表现突出,在现有旧水泥路面上加铺沥青层这种改造方式中也创造了良好的经济和社会效益。目前,国内旧水泥路面上加铺沥青混合料面层的设计方法多种多样,使用材料和施工技术也不尽相同,故有必要针对工程实际情况进行研究。本文以内蒙古兴安盟科右前旗路网改善工程为依托,首先对索满线旧水泥路面状况进行检测,确定改建方式。在此基础上,通过车辙和剪切试验,结合颗粒流软件,重点研究了薄层沥青处治方法,主要工作和成果如下:1.调查索满线旧水泥面板破损状况,其中断板率为4.9%,平均错台量为2.87mm,接缝传荷能力表现良好。调查索满线原水泥路面结构,其中面层弯拉强度的标准值为4.47 MPa。最终确定项目的改建采用加铺沥青面层的方式。2.用离散元软件对复合道路路面内部集料的细观行为进行研究,首先使用单轴贯入试验对模型细观参数进行标定,再以车辙试验试件为参照,建立混合料级配为AC-16,AC-13,AC-10 时,沥青加铺层厚度分别为 5cm、4.5cm、4cm、3.5cm、3cm时复合道路的离散元模型,从而对加铺层不同级配、不同厚度情况下的层间剪应力的分布进行探索。结果表明:加铺层级配越大、厚度越薄对层间粘结的要求越高。3.探索层间材料对抗剪强度的影响。使用SBS沥青和普通90#沥青为粘层材料在不同层间撒布量和抵抗水损害能力进行试验,最终确定层间材料为SBS沥青,最佳撒布量在1.4kg/m2～1.8kg/m2。4.探索旧水泥面板拉毛方式对抗剪强度的影响。在最佳层间材料撒布量的情况下对方格型、斜格型、横条型、斜条型、竖条型和随机凿毛型这六种旧水泥路面拉毛方式进行剪切试验,探索旧水泥面板的界面处理形式对层间性能的影响。不同拉毛方式下层间抗剪强度的大小的排序结果为:方格型横条型斜格型斜条型随机型竖条型。索满线的旧水泥面板拉毛方式为横条型为宜。最终索满线旧水泥面板的拉毛方式选择横条型为宜。
[Abstract]:Due to its use performance, environmental protection and other reasons, asphalt mixture pavement is more and more widely used, not only in the newly built roads, but also in the outstanding performance. Adding asphalt layer to the existing old cement pavement also creates good economic and social benefits. At present, the design method of asphalt mixture surface layer on the old cement pavement in China is varied, and the materials and construction technology are not the same, so it is necessary to study the actual situation of the project. Based on the road network improvement project of XingUNITA Section in Inner Mongolia, this paper first detects the condition of the old cement pavement and determines the reconstruction mode. On this basis, through rutting and shear tests, combined with particle flow software, the thin-layer asphalt treatment method is studied emphatically. The main work and results are as follows: 1. According to the investigation of the damaged condition of the old cement slab, the breakage rate is 4.9, the average stagger is 2.87 mm, and the load transfer capacity of the joint is good. The standard value of flexural tensile strength of surface layer is 4.47 MPA. Finally, it is determined that the reconstruction of the project adopts the method of overlaying asphalt surface. 2. The mesoscopic behavior of aggregate in composite road surface is studied by using discrete element software. First, the model parameters are calibrated by single axial penetration test, and then the mixture gradation AC-16AC-13AC-10 is established with rutting test specimen as reference. The discrete element model of the composite road when the thickness of asphalt overlay is 5 cm ~ 4.5 cm ~ 4 cm ~ (-1) ~ 3 cm ~ (3 cm) respectively, thus the distribution of interlayer shear stress under different gradation and thickness of overlay is explored. The results show that the thicker the overlay layer is, the higher the requirement of interlaminar bonding is. To explore the effect of interlaminar material on shear strength. SBS asphalt and ordinary 90# asphalt were used as clay layer materials to test the distribution and water damage resistance of different layers. Finally, SBS asphalt was determined as the interlayer material, and the optimum distribution was 1.4 kg / m ~ (2) / m ~ (2) ~ (-1) kg 路m ~ (2) 路m ~ (2) ~ (-1) kg 路m ~ (2). To explore the influence of the drawing way of the old cement panel on the shear strength. Shear tests were carried out on six kinds of old cement pavement, namely, grid type, skew lattice type, horizontal strip type, oblique strip type, vertical strip type and random hair-chiseling type, under the condition of optimum interlayer material distribution. To explore the influence of the interface treatment form of the old cement panel on the interlaminar performance. The order of shearing strength between the lower layers of different drawing modes is as follows: square transverse stripe, oblique lattice, oblique bar, random vertical strip. The plaster pattern of the old cement panel with cable-filled wire is of horizontal pattern. Finally, the plastering mode of cable-filled old cement panel is suitable for selection of horizontal stripe.
【学位授予单位】：内蒙古农业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U418.6

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