Analysis on Control Indicators for Settlement and Deformation of the Rock-Filled Subgrade in Mountainous Area

To increase the stability of roadbed, the indexes of settlement control of half-filled and half-dug roadbed are analyzed and studied. First, assuming that the Poisson's ratio is a constant, the Prony series expression of the Merchant model is derived. Moreover, the subgrade settlement model was...

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Bibliographic Details
Published inInternational journal of pavement research & technology Vol. 15; no. 1; pp. 213 - 220
Main Authors Zhao, Guofang, Song, Daming, Peng, Zongman, Yan, Zhanyou
Format Journal Article
LanguageEnglish
Published Singapore Springer Singapore 2022
Springer Nature B.V
Subjects
Asphalt pavements
Building Construction and Design
Civil Engineering
Construction
Control stability
Engineering
Finite element method
Mathematical models
Mountainous areas
Mountains
Original Research Paper
Poisson's ratio
Prony series
Road beds
Structural Materials
Subgrades
Tensile stress
Sedimentation control index
Model building
Numerical calculation
Rock-filled
Road works
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Summary:To increase the stability of roadbed, the indexes of settlement control of half-filled and half-dug roadbed are analyzed and studied. First, assuming that the Poisson's ratio is a constant, the Prony series expression of the Merchant model is derived. Moreover, the subgrade settlement model was built using ABAQUS software. By calculation, the uneven settlement curve of road embankment under different working conditions is obtained. The curve shape is mainly shown as the “spoon” shape or the “S” shape. The analysis shows that the post-construction settlement of the top surface of the rock-filled embankment has the characteristics of spatial and temporal coupling. Secondly, the two sides of the curve of “S” shape at the inflection point are fitted with a quadratic parabola. By analyzing the influence of asphalt pavement structure on parabola, it is revealed that the horizontal tensile stress of pavement structure has a linear relation with the quadratic term coefficient of parabola: they have a unique relation. Finally, the control index of settlement of rock-filled roadbed is put forward. That provides a data reference for later mountain subgrade construction.
ISSN:1996-6814
1997-1400
DOI:10.1007/s42947-021-00020-6