基于分形维数的高速铁路“微膨胀性”泥岩微观孔结构分析∗

张唐瑜

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基于分形维数的高速铁路“微膨胀性”泥岩微观孔结构分析∗

更新时间：2025-09-25

- 基于分形维数的高速铁路“微膨胀性”泥岩微观孔结构分析∗
- Analysis of Microscopic Pore Structure of “Micro-expansive” Mudstone in High Speed Railway based on Fractal Dimension
- 防灾减灾工程学报 2020年第1期页码：56-62
- 作者机构：
  
  兰州交通大学土木工程学院,甘肃,兰州,730070
- 作者简介：
- 基金信息：
  
  国家自然科学基金项目（51768033）、长江学者和创新团队发展计划滚动支持（IRT_15R29）、中国铁路总公司科技研究开发计划课题（Z2015-G001）、飞天学者特聘计划（2016）、甘肃省基础研究创新群体（145RJIA332）、甘肃省高校协同创新科技团队支持计划（2017c-08）、兰州交通大学优秀平台（201606）资助
- DOI：
  中图分类号： TU443
- 纸质出版：2020
- 稿件说明：
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张唐瑜,马丽娜,张戎令,王起才,王天双,王炳忠.基于分形维数的高速铁路“微膨胀性”泥岩微观孔结构分析∗[J].防灾减灾工程学报,2020,(1):56-62

ZHANG Tangyu. Analysis of Microscopic Pore Structure of “Micro-expansive” Mudstone in High Speed Railway based on Fractal Dimension[J]. 2020, (1): 56-62.
张唐瑜,马丽娜,张戎令,王起才,王天双,王炳忠.基于分形维数的高速铁路“微膨胀性”泥岩微观孔结构分析∗[J].防灾减灾工程学报,2020,(1):56-62 DOI：

ZHANG Tangyu. Analysis of Microscopic Pore Structure of “Micro-expansive” Mudstone in High Speed Railway based on Fractal Dimension[J]. 2020, (1): 56-62. DOI：

摘要

微膨胀性泥岩严重影响高速铁路的平稳运行，为研究压实作用对高速铁路微膨胀性泥岩微孔隙结构的影响，采用冻干法将压片机制备的不同干密度的试样进行干燥，应用压汞仪定量测定其孔隙分布特征。研究结果表明：随着试样干密度及进汞压力的增大，试验界限进汞压力逐渐增加，最大进汞量逐渐减小；不同干密度试样的孔隙特征分布曲线均呈现出明显的三峰特征，据此将试样孔隙分为大孔、中孔和小孔三类；采用与研究土体粒径级配类似的方法对孔隙的分布进行了分析，发现不同干密度的试样，小孔隙占比均较大；压实作用对大孔隙影响显著；采用Menger海绵模型及热力学关系模型对泥岩孔隙结构的分形特征进行了研究，研究发现泥岩干密度越大，泥岩孔隙内壁越粗糙，孔隙结构越复杂。研究成果可为膨胀泥岩地区高速铁路修建提供参考依据，对该地区同类工程建设具有借鉴意义。

Abstract

Micro expansive mudstone affects the smooth operation of high-speed railway seriously. In order to study the effect of compaction on the micro-pore structure of micro expansive mudstone of high speed railway

the freeze-drying method is applied to dry the samples with different dry densities using the tablet machine

and then the mercury porosimeter is used to measure the pore distribution characteristics quantitatively. The results show that with the increase of the dry density of the sample and mercury pressure

the mercury pressure limit of the test gradually increases

and the maximum amount of mercury decreases gradually. The pore distribution curves of different samples with different dry density all show three obvious peaks

according to this characteristic

the pores in the sample are classified into three types: large pore

mesopore

and small pore. The distribution of pores was analyzed by the same method as that used to study the particle size distribution of soils. It is found that the samples with different dry densities had a larger proportion of small pores; compaction has a significant effect on large pores. The Menger sponge model and thermodynamic relationship model were used to study the fractal characteristics of the pore structure of mudstone. It was found that the higher the dry density of mudstone

the more rough is the pore wall of mudstone and more complicated the pore structure. The research results can provide reference for the construction of high speed railway in the swelling mudstone area

and can be used as a reference in similar projects in this area.

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references

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