同步加纤碎石下封层技术的应用研究

发布时间：2018-01-06 03:37

本文关键词：同步加纤碎石下封层技术的应用研究　出处：《长安大学》2015年硕士论文　论文类型：学位论文

【摘要】：同步加纤碎石下封层是在原有养护方法基础上兴起来的一种工艺或材料,它是采用同步加纤碎石封层车几乎同时依次喷洒(撒)一层改性乳化沥青、一层纤维、一层改性乳化沥青、一层碎石,随即采用胶轮压路机进行碾压而成。此技术可用于公路下封层,其具有良好的应力吸收和分散能力、防水性好、稳定性高、施工快速便捷、对环境污染少等优点。目前,同步加纤碎石下封层在我国只有少数地区中开展研究和应用,尚未有相关技术规范对其材料取用、配合比设计、施工控制、路用性能评价指标及费用管理等方面做出具体规定,施工中对同步加纤碎石下封层的配合比设计还依赖理论法与经验法;材料选择还无可靠依据、且用量范围较宽;施工工艺及经济管理也只能参照类似工艺规范。因此,对同步加纤碎石下封层进行配合比设计、施工工艺、经济管理及相关研究,具有十分显著的实用意义。本文先建立同步加纤碎石下封层的ABAQUS有限元模型,在不同下封层弹性模量下,分析了各结构层不同深度的竖向变形和层底拉应力;对沥青粘结料、纤维及碎石等材料进行性能分析对比,选择适合同步加纤碎石下封层的材料,进行所选材料各项技术性能检测,并通过改变改性乳化沥青洒布量、纤维撒布量、碎石用量等制作不同配合比的试件,通过剪切试验、拉拔试验及动力渗水试验等力学试验以确定适合于某区的同步加纤碎石下封层的最佳配合比;以所选材料与试验得到的最佳配合比用同步加纤碎石下封层车铺筑试验路,对试验段进行剪切试验及拉拔试验,证明了同步加纤碎石下封层的路用性能良好;通过试验路的铺筑,总结出了同步加纤碎石下封层的施工工艺及质量控制办法;选择稀浆封层、碎石封层沥青路面做对比,对同步加纤碎石下封层沥青路面进行全寿命经济分析,得到同步加纤碎石下封层沥青路面的直接成本较低。得到的同步加纤碎石下封层的配合比设计指标、设计方法、施工工艺及路用性能指标体系等,使得该项技术便于在某区或全国范围内得到推广应用。同步加纤碎石下封层的前景十分乐观。
[Abstract]:Synchronous fiber rubble seal is a process or material rise based on the original maintenance method, it is the use of synchronous chip sealer plus fiber (SA) are almost at the same time spraying modified emulsified asphalt layer, a layer of fiber, the modified emulsified asphalt layer, a layer of gravel, with the rubber wheel the roller compacted together. This technique can be used for highway under seal, which has good stress absorption and dispersion ability, good waterproof performance, high stability, fast and convenient for construction, less environmental pollution. At present, the Synchronous Crushed Stone Seal plus fiber in our country only has to carry out the research and application of Minority Areas yet, the relevant technical specifications for the materials, mix design, construction control, road performance evaluation and cost management has made specific provisions, with the synchronous plus fiber rubble seal construction design also depends theory and experience Material selection method; no reliable basis, and the amount of wide range; construction technology and economic management can only refer to similar specifications. Therefore, mix design, construction technology of Synchronous Crushed Stone Seal Coat plus fiber, economic management and related research has very significant practical significance. This paper first established the finite element model of ABAQUS synchronous gravel plus fiber under seal, seal in different elastic modulus under different depth layers of vertical deformation and bottom layer tensile stress analysis; the asphalt binder, the performance analysis of the ratio of fiber and gravel and other materials, select the appropriate synchronization plus fiber rubble seal materials, selected the the technical performance of materials testing, and through the change of modified emulsified asphalt, fiber cloth, specimen making aggregate dosage of different proportion, through shear test and pull-out test and dynamic mechanical test leakage test Test to determine the best fit for a synchronous fiber gravel area under seal ratio; to best fit the selected materials and test than that obtained by synchronous plus fiber rubble seal car paved road test, shear test and pullout test of the test section, show that the synchronous plus fiber rubble seal road good performance; through test road paving, summarizes the construction technology and quality control of synchronous gravel plus fiber seal coat; selection of slurry seal, comparison of crushed stone seal asphalt pavement, analyzes the whole life of economy on the synchronous plus fiber seal coat of asphalt pavement under the rubble by direct cost plus fiber under seal coat of asphalt macadam synchronous the road is low. The synchronous plus fiber gravel under seal mix design index, design method, construction technology and road performance index system, the technology is easy to be popularized in a region or country Application. The prospect of synchro fiber reinforced lithotripsy is very optimistic.

【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.214

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