漠河地区冻结粉质黏土强度及其影响因素研究

taptap下载安装安卓学报 ›› 2025, Vol. 43 ›› Issue (2): 45-51.

漠河地区冻结粉质黏土强度及其影响因素研究

taptap下载安装安卓交通科学与工程学院，天津 3003000

收稿日期:2023-11-22 修回日期:2024-03-22 出版日期:2025-05-14 发布日期:2025-05-14
作者简介:戚春香（1980— ），女，河北衡水人，教授，博士，研究方向为机场工程设施与性能.
基金资助:
国家自然科学基金面上项目（52278542）；国家重点研发计划项目（2021YFB2600500）

Study on the strength of frozen powdery clay and its influencing factors

in the Mohe region

College of Transportation Science and Engineering, CAUC, Tianjin 300300, China

Received:2023-11-22 Revised:2024-03-22 Online:2025-05-14 Published:2025-05-14

摘要/Abstract

摘要：

多年冻土受温度及冻融循环作用影响显著，为了探究其力学特性，本文以漠河地区冻土为研究对象，开展

了不同含水率及冻融循环次数条件下的冻土直剪试验以及不同温度、含水率、围压、加载频率和冻融循环

次数条件下的冻土动三轴试验，以分析不同影响因素下冻土的抗剪特性和动力性能。试验结果表明：冻土

试样剪应力-剪切位移曲线为应变软化型；冻土试样随含水率和冻融循环次数增加，抗剪强度、黏聚力和内

摩擦角均出现不同程度的降低；冻土试样的动弹性模量在试验内的变化范围为 210~800 MPa，与含水率、

冻融循环次数、加载频率呈正相关关系，与温度和围压条件呈负相关关系，并随含水率的变化最为显著。同

时，根据试验结果得出基于各影响因素的冻土动弹性模量计算公式。以上研究成果可为漠河地区开展机场

建设等工程项目提供冻土力学特性参考数据。

关键词:

多年冻土, 抗剪强度, 动弹性模量, 冻融循环, 含水率

Abstract:

Permafrost is significantly affected by temperature and freeze-thaw cycles. In order to explore its mechanical properties, this paper takes frozen soil in Mohe area as the research object, and conducts direct shear tests of frozen soil

under different moisture content and freeze-thaw cycle times, as well as dynamic triaxial tests of frozen soil under

different temperature, moisture content, confining pressure, loading frequency, and freeze-thaw cycle times, to analyze the shear resistance characteristics and dynamic performance of frozen soil under different influencing factors. The experimental results indicate that the shear stress and shear displacement curves of frozen soil samples are

strain softening type. As the moisture content and freeze-thaw cycles increase, the shear strength, cohesion, and internal friction angle of frozen soil samples all decrease to varying degrees. The dynamic elastic modulus of frozen

soil samples varies within the range of 210-800 MPa in the experiment, which is positively correlated with moisture

content, freeze-thaw cycle times, and loading frequency, and negatively correlated with temperature and confining

pressure conditions, with the most significant change with moisture content. Meanwhile, based on the experimental

results, the formula for calculating the dynamic elastic modulus of frozen soil based on various influencing factors

are derived. The above research results can provide reference data on the mechanical properties of frozen soil for

airport construction and other engineering projects in the Mohe area.

Key words:

permafrost, shear strength, dynamic elastic modulus, freeze-thaw cycles, moisture content

中图分类号:

戚春香, 马佳荟, 路维龙, 张凯强, 赵中涛.

漠河地区冻结粉质黏土强度及其影响因素研究

[J]. taptap下载安装安卓学报, 2025, 43(2): 45-51.

QI Chunxiang, MA Jiahui, LU Weilong, ZHANG Kaiqiang, ZHAO Zhongtao.

Study on the strength of frozen powdery clay and its influencing factors

in the Mohe region

[J]. Journal of Civil Aviation University of China, 2025, 43(2): 45-51.

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