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低交通量路面中未结合粒料基层材料的水力-力学行为

Hydro-Mechanical Behaviour of an Unbound Granular Base Course Material Used in Low Traffic Pavements.

作者信息

Jing Peng, Chazallon Cyrille

机构信息

College of Metropolitan Transportation, Beijing University of Technology, Beijing 100124, China.

ICube, UMR7357, CNRS, Université de Strasbourg, INSA de Strasbourg, 24 Boulevard de la Victoire, 67084 Strasbourg CEDEX, France.

出版信息

Materials (Basel). 2020 Feb 13;13(4):852. doi: 10.3390/ma13040852.

DOI:10.3390/ma13040852
PMID:32069942
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7097728/
Abstract

This paper deals with the mechanical behaviour, especially the permanent deformation and resilient deformation of an unbound granular material (UGM) from Bréfauchet quarry which is used as base layer material in low traffic pavements for full-scale tests at IFSTTAR in France. Medium-scale repeated load triaxial tests (RLTT) are carried out at different water contents and the results show that both permanent and resilient deformations increase with water content. Besides, two techniques of fixing the sensors in materials with large particles for RLTTs are proposed and compared with each other. The results suggest that the tube method is more suitable for the UGM for an accurate measurement and a good adaptability is obtained during the RLTT. Based on the test results of UGM Bréfauchet, the modelling work is performed with improved models used previously for a sandy material. It appears that both the permanent and resilient behaviours of different unbound granular materials can be well captured by the proposed equations considering the effects of water content and anisotropy. This study is helpful to understand the evolution of permanent and resilient deformation in different granular layers, especially for the base layer, in low traffic pavements. The verified models can be used for other similar granular materials and this will lead to reducing the number of tests required to predict the deformation behaviour of granular materials.

摘要

本文研究了一种来自布雷福谢采石场的无结合料粒料（UGM）的力学性能，特别是其永久变形和弹性变形。该粒料用作法国IFSTTAR低交通量路面基层材料进行全尺寸试验。在不同含水量下进行了中型重复加载三轴试验（RLTT），结果表明永久变形和弹性变形均随含水量增加。此外，还提出并比较了两种在大颗粒材料中固定传感器用于RLTT的技术。结果表明，管法更适合于UGM，测量准确，且在RLTT过程中具有良好的适应性。基于布雷福谢UGM的试验结果，采用先前用于砂质材料的改进模型进行了建模工作。结果表明，考虑含水量和各向异性的影响，所提出的方程能够很好地描述不同无结合料粒料的永久和弹性性能。本研究有助于理解低交通量路面中不同粒料层，特别是基层中永久变形和弹性变形的演变。经过验证的模型可用于其他类似粒料材料，这将减少预测粒料材料变形行为所需的试验次数。

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本文引用的文献

1
Effect of Anisotropy on the Resilient Behaviour of a Granular Material in Low Traffic Pavement.各向异性对低交通量路面粒料回弹特性的影响
Materials (Basel). 2017 Dec 3;10(12):1382. doi: 10.3390/ma10121382.