基于细观孔隙的高温冻土蠕变变形试验研究

郭焕明; 张虎; 刘枫; 丑亚玲; 郑波

doi:10.20174/j.JUSE.2025.05.15

地下空间与工程学报 >

2025 , Vol. 21 >Issue 5: 1613 - 1620

DOI: https://doi.org/10.20174/j.JUSE.2025.05.15

理论与试验研究

基于细观孔隙的高温冻土蠕变变形试验研究

郭焕明 ,
张虎 ,
刘枫 ,
丑亚玲 ,
郑波

展开

1.兰州理工大学土木工程学院,兰州 730050;
2.东北林业大学土木与交通学院,哈尔滨 150040;
3.中国科学院西北生态环境资源研究院冻土工程国家重点实验室,兰州 730000;
4.中国水电建设集团十五工程局有限公司,西安 710399;
5.中铁西南科学研究院有限公司,成都 611731

郭焕明(2001—),男,甘肃会宁人,硕士生,主要从事软土与冻土地基处理、数值模拟及计算等研究。E-mail: 2199827118@qq.com

张虎(1986—),男,山东济宁人,博士,教授,主要从事寒区工程与环境、冻土地基处理、数值模拟等教学和研究。E-mail:zhanghu@nefu.edu.cn

收稿日期: 2025-02-25

网络出版日期: 2025-10-17

基金资助

国家自然科学基金(41971085);四川省科技计划(2024NSFSC0158)

收起

Experimental Study on Creep Deformation of High-Temperature Frozen Soil Based on Microscopic Pores

Guo Huanming ,
Zhang Hu ,
Liu Feng ,
Chou Yaling ,
Zheng Bo

Expand

1. School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, P.R. China;
2. College of Civil Engineering and Transportation, Northeast Forestry University, Harbin 150040, P.R. China;
3. State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, P.R. China;
4. Sino hydro 15th Engineering Bureau Co., Ltd., Xi 'an 710399, P.R. China;
5. China Railway Southwest Research Institute Co., Ltd., Chengdu 611731, P.R. China

Received date: 2025-02-25

Online published: 2025-10-17

Fold

摘要

高温冻土在长期荷载作用下易发生蠕变变形,为探究其内部孔隙结构对高温冻土蠕变变形的影响,对高温冻土开展了不同温度、干密度和轴向应力下的静三轴蠕变试验,同时也对蠕变试验结束后的风干三轴试样进行了CT扫描及孔隙提取处理。结果表明:通过Avizo对CT扫描图片进行3D建模和孔隙提取,采用3种不同方法对提取孔隙进行孔隙等效分析后发现,球体等效误差最小,因此选择球体等效进行细观孔隙分析,并将孔隙分为0~200 μm、200~500 μm、500~1 000 μm、>1 000 μm共4类;在所给试验条件下,试样孔径主要分布在200~500 μm区间内,而蠕变变形量与孔径>500 μm孔隙数目呈正相关关系;蠕变变形随着温度的升高、干密度的减小和轴向应力的增大而增大,且温度、干密度和轴向应力都会对高温冻土蠕变变形和孔径>500 μm的孔隙数目产生显著的影响;试样内部孔径>500 μm的孔隙数量随着温度的升高、干密度的减小和轴向应力的增大而增加。

关键词： 高温冻土蠕变; 变形; 细观孔隙; 大孔径孔隙

本文引用格式

郭焕明 , 张虎 , 刘枫 , 丑亚玲 , 郑波 . 基于细观孔隙的高温冻土蠕变变形试验研究[J]. 地下空间与工程学报, 2025 , 21(5) : 1613 -1620 . DOI: 10.20174/j.JUSE.2025.05.15

Abstract

The high-temperature frozen soil is prone to creep deformation under long-term load. In order to explore the influence of its internal pore structure on the creep deformation of high-temperature frozen soil, static triaxial creep tests under different temperatures, dry densities and axial stresses were carried out on the high-temperature frozen soil. At the same time, CT scanning and pore extraction were carried out on the air-dried triaxial samples after the creep test. The results show that: Avizo was used to conduct 3D modeling and pore extraction on CT scan images. After conducting pore equivalence analysis on the extracted pores using three different methods, it was found that sphere equivalent error was the smallest. Therefore, sphere equivalent was selected for microscopic pore analysis, and the pores were divided into four categories: 0~200 μm, 200~500 μm, 500~1 000 μm and >1 000 μm. Under the given test conditions, the pore size of the sample is mainly distributed in the range of 200~500 μm, and the creep deformation is positively correlated with the number of pores with the pore size >500 μm. The creep deformation increases with the increase of temperature, the decrease of dry density and the increase of axial stress, and the temperature, dry density and axial stress all have significant effects on the creep deformation and the number of pores with pore size >500 μm. The number of pores with pore size >500μm increases with increasing temperature, decreasing dry density and increasing axial stress.

Key words： creep of high temperature frozen soil; deformation; mesopore; large-diameter pore

参考文献

[1] 徐学祖, 王家澄, 张立新. 冻土物理学[M]. 北京:科学出版社, 2001. (Xu Xuezu, Wang Jiacheng, Zhang Lixin. Physics of frozen soil[M]. Beijing: Science Press, 2001. (in Chinese))
[2] 齐吉琳, 张建明, 姚晓亮, 等. 多年冻土地区构筑物沉降变形分析[J]. 岩土力学, 2009, 30(增2): 1-8. (Qi Jilin, Zhang Jianming, Yao Xiaoliang, et al. Analysis of settlements of constructions in permafrost regions[J]. Rock and Soil Mechanics, 2009, 30(Supp.2): 1-8. (in Chinese))
[3] 刘永智, 吴青柏, 张建民, 等. 高原多年冻土地区公路路基温度场现场实验研究[J]. 公路, 2000(2): 5-8. (Liu Yongzhi, Wu Qinbai, et al. Field experimental study on temperature field of highway subgrade in permafrost area of plateau[J]. Highway, 2000 (2): 5-8. (in Chinese))
[4] 刘枫. 静三轴条件下高温冻土孔压及力学性质研究[D]. 兰州:兰州理工大学, 2023. (Liu Feng. Pore pressure and mechanical properties of high temperature frozen soil under static triaxial condition[D]. Lanzhou: Lanzhou University of Technology, 2023. (in Chinese))
[5] 马小杰, 张建明, 郑波, 等. 青藏高原高温冻土旁压蠕变试验研究[J]. 中国铁道科学, 2008, 29(6): 1-5. (Ma Xiaojie, Zhang Jianming, Zheng Bo, et al, Experimental study on lateral pressure creep of high temperature frozen soil in Tibetan Plateau[J]. China Railway Science, 2008, 29(6): 1-5. (in Chinese))
[6] 王松鹤, 齐吉琳. 排水和不排水条件下高温冻土松弛特性研究[J]. 冰川冻土, 2011, 33(4): 833-838. (Wang Songhe, Qi Jilin. Study on relaxation characteristics of high temperature frozen soil under drained and undrained conditions[J], Journal of Glaciology and Geocryology, 2011, 33(4): 833-838. (in Chinese))
[7] 焦贵德, 赵淑萍, 马巍, 等. 循环荷载下高温冻土的变形和强度特性[J]. 岩土工程学报, 2013, 35(8): 1553-1558. (Jiao Guide, Zhao Shuping, Ma Wei, et al. Deformation and strength of warm frozen soils under cyclic loading[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(8): 1553-1558. (in Chinese))
[8] 杨岁桥, 王宁宁, 张虎. 高温冻土的蠕变特性试验及蠕变模型研究[J]. 冰川冻土, 2020, 42(3): 834-842. (Yang Suiqiao, Wang Ningning, Zhang Hu. Study on creep test and creep model of warm frozen soil[J]. Journal of Glaciology and Geocryology, 2020, 42(3): 834-842. (in Chinese))
[9] Fan W H, Yang P, Yang Z H. Freeze-thaw impact on macropore structure of clay by 3D X-ray computed tomography[J]. Engineering Geology, 2021, 280, 105921.
[10] 胡智, 李志超, 李丽华, 等. 基于CT的干湿循环-动荷载贯序耦合作用下压实粉质黏土细观结构特征研究[J]. 岩土力学, 2023, 44(10): 2860-2870. (Hu Zhi, Li Zhichao, Li Lihua, et al. CT-based mesoscopic structural characteristics of compacted silty clay under wetting-drying cycles sequentially coupled with dynamic loadings[J]. Rock and Soil Mechanics, 2023, 44(10): 2860-2870. (in Chinese))
[11] 张巍, 梁小龙, 唐心煜, 等. 显微CT扫描南京粉砂空间孔隙结构的精细化表征[J]. 岩土工程学报, 2017, 39(4): 683-689. (Zhang Wei, Liang Xiaolong, Tang Xinyu, et al. Fine characterization of spatial pore structure of Nanjing silty sand using micro-CT[J]. Chinese Journal of Geotechnical Engineering. 2017, 39(4): 683-689. (in Chinese))
[12] 陈正汉, 方祥位, 朱元青, 等. 膨胀土和黄土的细观结构及其演化规律研究[J]. 岩土力学, 2009, 30(1): 1-11. (Chen Zhenghan, Fang Xiangwei, Zhu Yuanqing, et al. Research on meso-structures and their evolution laws of expansive soil and loess[J]. Rock and Soil Mechanics, 2009, 30(1): 1-11. (in Chinese))
[13] 郑佳, 庄建琦, 孔嘉旭, 等. 基于CT扫描的黄土孔隙结构特征研究[J]. 地质科技通报, 2022, 41(6): 211-222. (Zheng Jia, Zhuang Jianqi, Kong Jiaxu, et al. Study of loess pore structure characteristics based on CT scanning[J]. Bulletin of Geological Science and Technology, 2022, 41(6): 211-222. (in Chinese))
[14] Li X, Lu Y D, Zhang X Z, et al. Quantification of macropores of Malan loess and the hydraulic significance on slope stability by X-ray computed tomography[J]. Environmental Earth Sciences, 2019, 78(16): 1-19.
[15] 李鑫. 基于CT的黄土微细观空隙结构及优先流特性研究[D]. 西安:长安大学, 2020. (Li Xin. Research on Micro and Meso Void Structure and Preferential Flow Characteristics of Loess Based on CT[D]. Xian: Chang'an University, 2020. (in Chinese))
[16] Simone C, Wim D, Richard L. Industrial X-Ray Computed Tomography[M]. Cham, Switzerland: Springer International Publishing, 2018.
[17] 石济元. 海湾遥感频域图象处理及效果[J]. 山东大学学报(自然科学版), 1984 (1): 42-48. (Shi Jiyuan. Gulf remote sensing frequency domain image processing and effect[J]. Journal of Shandong University(Natural Science), 1984 (1): 42-48. (in Chinese))
[18] 周新伦. 局部平均法图象平滑技术综述[J]. 通信学报, 1983 (2): 51-58. (Zhou Xinlun. Survey of the techniques of image smoothing by means of local averaging[J]. Journal on Communications, 1983 (2): 51-58. (in Chinese))
[19] 刘世伟, 张建明, 张虎, 等. 高温冻土中孔隙水压力量测初探[J]. 甘肃农业大学学报, 2011, 46(6): 155-160. (Liu Shiwei, Zhang Jianming, Zhang Hu, et al. Preliminary discussion on pressure measurement of pore water in frozen soil[J]. Journal of Gansu Agricultural University, 2011, 46(6): 155-160.(in Chinese))
[20] 王宁宁, 张虎, 张建明, 等. 不同温度及排水条件下高温冻土孔隙水压力试验研究[J]. 冰川冻土, 2018, 40(6): 1167-1172. (Wang Ningning, Zhang Hu, Zhang Jianming, et al. Experimental study of pore water pressure of high temperature frozen soil under different temperature and drainage conditions[J]. Journal of Glaciology and Geocryology, 2018, 40(6): 1167-1172.(in Chinese))
[21] 宋丙堂, 刘恩龙, 张德, 等. 高温冻结粉土力学特性试验研究[J]. 冰川冻土, 2019, 41(3): 595-605. (Song Bingtang, Liu Enlong, Zhang De, et al. Experimental study on the mechanical properties of warm frozen silt soils[J]. Journal of Glaciology and Geocryology, 2019, 41(3): 595-605.(in Chinese))
[22] 孙凯,陈正林,陈剑,等.基于分数阶导数的冻土蠕变本构模型[J].地下空间与工程学报,2018,14(1):19-25.(Sun Kai,Chen Zhenglin,Chen Jian,et al.A creep constitutive model for frozen soil based on fractional derivative[J].Chinese Journal of Underground Space and Engineering,2018,14(1):19-25.(in Chinese))
[23] 马芹永,袁璞,陈文峰,等.人工冻土单轴与围压状态动力学性能对比分析[J].地下空间与工程学报,2014,10(1):26-29.(Ma Qinyong,Yuan Pu,Chen Wenfeng,et al.Comparative analysis on dynamic mechanical properties of artificial frozen soil under uniaxial load and confining pressure[J].Chinese Journal of Underground Space and Engineering,2014,10(1):26-29.(in Chinese))

Options

文章导航

模态框（Modal）标题

摘要

本文引用格式

Abstract

参考文献