冲击压实技术在公路路基处理中的应用研究

发布时间：2018-10-26 07:31

【摘要】：近年来,人们多关注路面结构层材料性能的研究,尤其是面层材料的性能和压实的研究和应用,而对路基土的研究往往不够。自从冲击压实技术引入我国后,土基的快速有效的压实,路基回弹模量的大幅度提高,人们关注提高路基土性能的研究。由于冲击压实技术在我省公路建设中应用刚刚开始,本文结合沈阳市苏家屯区佟白线公路新建工程路基处理工程,系统研究冲击压实技术的应用问题,并结合辽宁省当地的典型沥青路面结构,进行高模量路基沥青路面结构的力学响应分析,为冲击压实技术在辽宁省的推广应用提供科学依据。为了更全面的掌握冲击压实技术,本文将从以下四个方面渐进展开：1.通过收集国内外研究成果,了解冲击压实技术的发展并掌握冲击压实技术作用机理,分析冲击压实技术在不同路基填料下的适用性。2.结合辽宁省公路建设中运用冲击压实技术的工程经验,探讨高模量路基对沥青路面结构的影响。利用有限元分析软件建模研究高模量路基下沥青路面结构设计参数的变化规律,推荐典型沥青路面结构。3.根据推荐的沥青路面结构,铺筑试验路。进行检测数据采集分析,验证冲击压实技术的实际使用效果。4.综合考虑道路全寿命,结合时效性进行施工成本分析。本文研究结果表明提高土基模量可以有效降低沥青路面结构,路表弯沉值及改善各结构层层底弯拉应力；经冲击压实技术处理的一般路基,基层厚度可以适当减薄15-20cm。鉴于橡胶沥青混合料的具有良好的抗车辙性、抗疲劳性能以及稳定的温度稳定性等优点。推荐采用橡胶沥青的新型沥青路面结构结合冲击压实技术进行推广。
[Abstract]:In recent years, people pay more attention to the research of pavement structure layer material performance, especially the research and application of surface layer material performance and compaction, but the research on subgrade soil is often insufficient. Since the impact compaction technology was introduced into China, the rapid and effective compaction of soil foundation and the improvement of subgrade resilience modulus have been paid more attention to. Since the application of impact compaction technology in highway construction in our province has just begun, this paper systematically studies the application of impact compaction technology in combination with the new subgrade treatment project of Tong Baiyun Highway in Sujiatun District, Shenyang City. Combined with the typical asphalt pavement structure in Liaoning Province, the mechanical response analysis of asphalt pavement structure with high modulus subgrade is carried out, which provides scientific basis for the popularization and application of impact compaction technology in Liaoning Province. In order to master the impact compaction technology more comprehensively, this paper will develop gradually from the following four aspects: 1. Through collecting the domestic and foreign research results, the development of impact compaction technology and the mechanism of impact compaction technology are understood, and the applicability of impact compaction technology under different subgrade fillings is analyzed. 2. Based on the engineering experience of impact compaction technology in highway construction in Liaoning Province, the influence of high modulus subgrade on asphalt pavement structure is discussed. In this paper, finite element analysis software is used to model the design parameters of asphalt pavement under high modulus subgrade, and the typical asphalt pavement structure is recommended. According to the recommended asphalt pavement structure, paving test road. Test data collection and analysis to verify the impact compaction technology of the actual use of the effect. 4. Considering the whole life of the road, the construction cost is analyzed in combination with the timeliness. The research results show that increasing the modulus of soil foundation can effectively reduce the asphalt pavement structure, the deflection value of the pavement surface and the bending and tensile stress at the bottom of each structure, and the thickness of the base course can be reduced appropriately by the impact compaction technology for the general subgrade. In view of the rubber asphalt mixture has good rutting resistance, fatigue resistance and stable temperature stability and so on. A new type of asphalt pavement structure with rubber asphalt is recommended to be popularized with impact compaction technology.
【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.1

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