【作者】 李洪蛟；

【导师】 支喜兰；

【作者基本信息】 长安大学 ， 道路与铁道工程， 2011， 硕士

【摘要】 由于青藏公路的重要性以及所处环境条件和地理位置的特殊性,尤其随着季节的更替很容易发生冻胀和融沉,致使路面产生不均匀变形,为了保证行车的舒适性和行车安全,有必要对路基路面的不均匀变形进行研究并提出处治措施,这对路基路面的养护有重要的理论意义和现实意义。本文通过现场调研和理论分析相结合的方法,对青藏公路的路基路面变形情况进行了有限元模型数值模拟分析,并提出了不均匀变形的处治标准以及对不均匀变形的综合处治措施。1.本文通过对青藏公路的现场调研,并分析不均匀变形发生发展的原因及影响因素,分别提出了横向不均匀变形和纵向不均匀变形的处治控制指标。2.根据青藏公路调研的实际情况,建立有限元模型并对不均匀变形进行有限元数值计算,分别分析了路基高度、路基路面各结构层的模量、融化深度对不均匀变形的影响。3.根据数值计算和理论分析,提出了不均匀变形处治的判断标准和适用于青藏公路不均匀变形的综合处治措施。4.通过对不均匀变形采取措施后的有限元数值模拟分析,确定了处治措施相关的技术参数。本文的研究将为公路路基路面不均匀变形的处治提供理论依据,对青藏公路养护工程具有参考价值。更多还原

【Abstract】 Qinghai-Tibet Highway is important. For its special environmental conditions and geographical, the freezing and thawing are prone to occur with the season changing, which may lead the uneven pavement deformation. In order to ensure driving comfort and driving safety, treatment measures for pavement inhomogeneous deformation is necessary to be proposed. It has important theoretical and practical significance for maintenance of pavement and subgrade.1. Based on the Qinghai-Tibet Highway on-site investigation, the analysis of the reasons for the development of inhomogeneous deformation and impact factors were proposed. The treatments for horizontal and vertical non-uniform deformation were also put forward.2. The model for inhomogeneous deformation was established and the inhomogeneous deformation caused by height of subgrade, modulus for the structure and thawing depth was analyzed.3. Based on the numerical calculation and theoretical analysis, the comprehensive treatment measures and criteria for non-uniform deformation of the Qinghai-Tibet Highway was presented.4. By finite element numerical simulation for the non-uniform deformation after treatment measures, the related technical parameters were determined.This paper focuses on the Qinghai-Tibet Highway pavement uneven deformation and its treatment measures. It provides the theoretical basis for treatment of the uneven deformation and is meaningful for the maintenance of Qinghai-Tibet Highway.更多还原