CT-based mesoscopic structural characteristics of compacted silty clay under wetting-drying cycles sequentially coupled with dynamic loadings

HU Zhi; LI Zhi-chao; LI Li-hua; YAN Xin; ZHAN Wei

doi:10.16285/j.rsm.2023.0798

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CT-based mesoscopic structural characteristics of compacted silty clay under wetting-drying cycles sequentially coupled with dynamic loadings

更新时间：2026-06-25

- CT-based mesoscopic structural characteristics of compacted silty clay under wetting-drying cycles sequentially coupled with dynamic loadings
- Vol. 44, Issue 10, Pages: 2860-2870(2023)
- 作者机构：
  
  1. 浙江省交通运输科学研究院浙江省道桥检测与养护技术研究重点实验室,浙江,杭州,310023
  2. 湖北工业大学土木建筑与环境学院,湖北,武汉,430068
  3. 中建三局第一建设工程有限责任公司,湖北,武汉,430040
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2023.0798
  CLC： U416.1
- Online First：16 October 2023，
  
  Published：2023
- 稿件说明：
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HU Zhi, LI Zhi-chao, LI Li-hua, et al. CT-based mesoscopic structural characteristics of compacted silty clay under wetting-drying cycles sequentially coupled with dynamic loadings[J]. 2023, 44(10): 2860-2870.
DOI：

HU Zhi, LI Zhi-chao, LI Li-hua, et al. CT-based mesoscopic structural characteristics of compacted silty clay under wetting-drying cycles sequentially coupled with dynamic loadings[J]. 2023, 44(10): 2860-2870. DOI： 10.16285/j.rsm.2023.0798.

摘要

为进一步揭示多因素耦合作用下服役期路基土体性能劣化机制，在前期工作基础上，采用CT扫描技术对经历不同干湿循环、动荷载条件的压实粉质黏土试样细观结构特征开展研究，分析干湿循环−动荷载贯序耦合作用对试样孔隙三维空间分布、孔隙体积统计分布、图像灰度统计指标的影响规律，分析试样宏观性能与细观结构特征的关系。试验结果表明：干湿循环作用会导致试样产生更多大孔隙和贯通裂隙，动荷载作用可以使因干湿循环产生的部分孔隙或裂隙闭合；随着干湿循环和动荷载的贯序耦合作用，试样中的小孔隙数量呈增多趋势；干湿循环作用均会导致孔隙总体积增加，动荷载作用则会使孔隙总体积减小；试样细观结构特征参数可以用于解释试样宏观性能演化规律。

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