Overconsolidated Stress and Strain Condition of Pavement Layers as a Result of Preloading during Construction

IF 1.4 4区 工程技术 Q3 ENGINEERING, CIVIL
M. Vamos, J. Szendefy
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引用次数: 1

Abstract

The stiffness and resilient behavior of soils are essential input properties when designing pavements. There are many material models that take into account the stress dependency of stiffness. In pavements, horizontal stresses generally differ from conventional soils because of the preloading of the pavement during construction. In this research, standardized pavement cross sections were analyzed using finite element software with advanced soil constitutive models, and equations describing their behavior were calibrated with the back-analysis of in-situ and laboratory measurements. The pavement was modelled as comprising 4 layers: asphalt pavement, well graded crushed stone base course, granular subbase course and fine-medium sandy subgrade. The ratio of horizontal and vertical stresses σ3/σ1 and strains ε3/ε1 were investigated and assessed in the function of depth and loading, and recommendations are given for the description of these functions. The recommendations give useful input data for future practical applications such as simplified calculation methods that are capable of determining the permanent settlement beneath flexible pavements without the use of finite element methods.
施工中预压引起的路面层超固结应力应变状况
在设计路面时,土壤的刚度和弹性特性是必不可少的输入特性。有许多材料模型考虑了刚度的应力依赖性。在路面中,由于施工过程中路面的预压,水平应力通常与常规土壤不同。在这项研究中,使用具有先进土壤本构模型的有限元软件对标准化路面截面进行了分析,并通过现场和实验室测量的反分析校准了描述其行为的方程。路面模型由4层组成:沥青路面、分级良好的碎石基层、颗粒基层和中细砂路基。研究了水平和垂直应力σ3/σ1和应变ε3/ε1的比值对深度和荷载的作用,并对这些作用的描述提出了建议。这些建议为未来的实际应用提供了有用的输入数据,例如能够在不使用有限元方法的情况下确定柔性路面下永久沉降的简化计算方法。
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来源期刊
Periodica Polytechnica-Civil Engineering
Periodica Polytechnica-Civil Engineering 工程技术-工程:土木
CiteScore
3.40
自引率
16.70%
发文量
89
审稿时长
12 months
期刊介绍: Periodica Polytechnica Civil Engineering is a peer reviewed scientific journal published by the Faculty of Civil Engineering of the Budapest University of Technology and Economics. It was founded in 1957. Publication frequency: quarterly. Periodica Polytechnica Civil Engineering publishes both research and application oriented papers, in the area of civil engineering. The main scope of the journal is to publish original research articles in the wide field of civil engineering, including geodesy and surveying, construction materials and engineering geology, photogrammetry and geoinformatics, geotechnics, structural engineering, architectural engineering, structural mechanics, highway and railway engineering, hydraulic and water resources engineering, sanitary and environmental engineering, engineering optimisation and history of civil engineering. The journal is abstracted by several international databases, see the main page.
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