Investigation on stress-strain relationship of TDA-graded aggregate mixtures in 
large-scale triaxial test

CHEN Xiao-bin; YANG Ning-yu; ZHU Yu; ZHANG Jun-qi; QIAO Shi-fan

doi:10.16285/j.rsm.2020.0838

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Investigation on stress-strain relationship of TDA-graded aggregate mixtures in large-scale triaxial test

更新时间：2026-06-25

- Investigation on stress-strain relationship of TDA-graded aggregate mixtures in large-scale triaxial test
- Vol. 42, Issue 4, Pages: 921-931(2021)
- 作者机构：
  
  1. 中南大学土木工程学院,湖南,长沙,410083
  2. 中南大学重载铁路工程结构教育部重点实验室,湖南,长沙,410075
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2020.0838
  CLC： U213.7
- Online First：25 April 2021，
  
  Published：2021
- 稿件说明：
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CHEN Xiao-bin, YANG Ning-yu, ZHU Yu, et al. Investigation on stress-strain relationship of TDA-graded aggregate mixtures in large-scale triaxial test[J]. 2021, 42(4): 921-931.
DOI：

CHEN Xiao-bin, YANG Ning-yu, ZHU Yu, et al. Investigation on stress-strain relationship of TDA-graded aggregate mixtures in large-scale triaxial test[J]. 2021, 42(4): 921-931. DOI： 10.16285/j.rsm.2020.0838.

摘要

掌握轮胎衍生骨料（TDA）级配碎石混合料临界状态变化是TDA在道床中安全应用的重要前提，目前对此研究存在不足。通过大型静三轴试验，分析了3种围压、4种TDA体积含量的TDA级配碎石混合的应力?应变特性，研究了围压、TDA含量对TDA级配碎石混合料的临界状态变化影响。结果表明：当TDA体积掺量小于20%时，混合料的剪切特性为应变软化型；当TDA体积掺量大于20%时，混合料的剪切特性为应变硬化型。试验结果分析发现，TDA级配碎石混合料的临界状态线在平面上为直线，并且临界状态参数与TDA体积含量呈现线性变化。因此，基于临界状态理论，通过构建临界状态参数和TDA含量的关系，推导了能够正确描述TDA级配碎石混合料的应力?应变特征和体积变形特征的预测公式。通过预测值与试验值之间的对比，证实了该公式的合理性。

Abstract

the evolution of the critical state of TDA-graded aggregates is essential to safety for TDA application in railway roadbed

but the investigations on effects of TDA on the critical state are rare. This paper presents an experimental investigation on the stress strain relationship of TDA-graded aggregates through large scale triaxial apparatus by consolidation and drainage conditions. In total

12 groups of specimens were carried out considering four volumetric TDA content and three confining pressures. The experimental results show that the shear properties of the TDA sub-ballast mixture are characterized as strain-softening when the TDA volume content is less than 20%

and show strain hardening when the TDA volume content is greater than 20%. And the critical state line (CSL) in space

and relationship between the TDA content and the values of parameters of CSL is linearity. In consequence

the strain-stress of TDA-graded aggregates based on the critical state line characteristics was predicted

and compared to the corresponding measured values with good agreement. It highlights the feasibility of the new formula for the TDA-graded aggregates. These experimental findings are helpful for modeling aggregates with TDA inclusion.

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