Experimental study on the deformation of saturated soil-rock mixture under cyclic loading under confined conditions

HE Feng; XU Yongqing; HU Shengliang; LI Haichao; TONG Chenxi; ZHAO Wei; CHEN Xin; XIAO Minhua

doi:10.11835/j.issn.2096-6717.2025.099

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Experimental study on the deformation of saturated soil-rock mixture under cyclic loading under confined conditions

更新时间：2025-10-31

- Experimental study on the deformation of saturated soil-rock mixture under cyclic loading under confined conditions
- Journal of Civil and Environmental Engineering Pages: 1-10(2025)
- 作者机构：
  
  1.南昌市城市规划设计研究总院集团有限公司，南昌 330038
  2.中国民航大学交通科学与工程学院，天津 300300
  3.中南大学土木工程学院，长沙 410075
  4.中铁二局集团有限公司，成都 610036
  5.南昌市建设投资集团有限公司，南昌 330038
- 作者简介：
  
  HE Feng(1976- ), professor-level senior engineer, main research interest: road engineering, E-mail: 1354119240@qq.com.
  HU Shengliang （corresponding author）， senior engineer， husljxnc@163.com.
- 基金信息：
  
  Tianjin Municipal Education Commission Scientific Research Program(XJ2022009601);Fundamental Research Funds for the Central Universities(3122025044)
- DOI：10.11835/j.issn.2096-6717.2025.099
  CLC： TU433;U416.1
- Received：09 April 2025，
  
  Online First：31 October 2025，
- 稿件说明：
移动端阅览
何锋,徐勇清,胡盛亮等.循环荷载作用下饱和土石混合料侧限变形试验研究[J].土木与环境工程学报,

HE Feng,XU Yongqing,HU Shengliang,et al.Experimental study on the deformation of saturated soil-rock mixture under cyclic loading under confined conditions[J].Journal of Civil and Environmental Engineering,
何锋,徐勇清,胡盛亮等.循环荷载作用下饱和土石混合料侧限变形试验研究[J].土木与环境工程学报, DOI：10.11835/j.issn.2096-6717.2025.099.

HE Feng,XU Yongqing,HU Shengliang,et al.Experimental study on the deformation of saturated soil-rock mixture under cyclic loading under confined conditions[J].Journal of Civil and Environmental Engineering, DOI：10.11835/j.issn.2096-6717.2025.099.

摘要

土石混合料是山区机场建设过程中较为常用的道基填料，在循环荷载作用下会产生累积变形，由此产生的不均匀沉降会导致上部基础结构的稳定性下降。为揭示循环荷载作用下土石混合料的累积变形规律，开展饱和土石混合料的侧限动态压缩试验，分析块石含量和固结压力作用下试样的累积变形量随循环荷载加载次数的变化规律，并且建立相应的数学模型。结果表明，在相同块石含量下，增大固结压力会导致试样的最大累积轴向变形量增大，其增长幅度会随着块石含量增大而明显加快。饱和土石混合料的变形曲线大体上可分为两个阶段：在循环荷载作用初期，试样的轴向变形会随着加载次数增大而快速累积，但随着试样被逐渐压密，试样的变形曲线将呈现出缓慢增长的趋势。在此基础上，提出能描述土石混合料在循环荷载作用下累积变形规律的简单数学模型，将拟合结果与试验结果进行对比，发现两者具有较好的相关性。此外，还分析了循环荷载作用下饱和土石混合料试样内部超孔隙水压随时间的变化规律，以及超孔隙水压的快速形成和缓慢消散过程。

Abstract

Soil and rock mixtures are commonly used as subgrade fill materials for mountain airports. When subjected to cyclic loading

they experience cumulative deformation

leading to uneven settlements that can compromise the stability of the upper foundation. To understand this deformation pattern

a series of dynamic compression tests was conducted on soil and rock mixtures. The study analyzed how the specimen's cumulative deformation changed with the number of cyclic loads across different stone contents and confining pressures

and it developed a corresponding mathematical model. Results showed that

at a fixed stone content

higher confining pressure resulted in greater maximum axial cumulative deformation

with the rate of increase accelerating as stone content increased. The deformation curve typically has two phases: an initial rapid accumulation of axial deformation during cyclic loading

followed by a slower growth as the specimen densifies. Based on these findings

a simple model describing the law of cumulative deformation was proposed

which aligned well with experimental data. The study also examined how excess pore water pressure in saturated specimens evolves during cyclic loading

noting its rapid buildup and slow dissipation.

关键词

Keywords

references

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