单向冻结条件下粗颗粒级配土的水热分布及冻胀特性研究

doi:10.13722/j.cnki.jrme.2022.1025

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摘要随着寒旱区高速铁路工程的增多和工程服役时间的增长，气态水迁移引发的路基冻害问题被广泛关注。为深入探究寒区粗颗粒填料的冻胀机制，研制一套考虑水–热–力耦合的土柱试验装置，开展不同补水类型、细颗粒含量、细颗粒类型的单向冻结试验。结果表明：(1) 冻结锋面位置受补水方式、细粒土含量的影响较为显著，细粒土类型的影响相对较小。(2) 随冻结时间的增长，液–气组合补水和气态水补水均会导致试样含水率不断升高，而前者含水率变化较快。细粒土含量和类型会显著影响气态水迁移量，造成土柱水分分布的明显差异。(3) 粗颗粒级配土中液态水很难通过冻胀–抽吸力直接上升至冻结锋面，气态水迁移是造成冻胀发展的重要因素。在高速铁路的长期运营过程中，气态水迁移引发的路基水分积聚和冻胀问题不可忽视。

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	刘倩倩1
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	蔡国庆1
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	秦宇腾2
	尹凤杰2
	李舰2
	赵成刚2

关键词 ：土力学, 粗颗粒级配填料, 单向冻结试验, 气态水迁移, 水热分布, 冻胀

Abstract：With the increase of high-speed railway construction in cold and arid areas and the increase in engineering service time，the problem of subgrade frost heave caused by vapor migration has been widely concerned. To deeply explore the hydrothermal distribution and frost heave characteristics of coarse-grained graded packing，a soil column test device considering hydro-thermo-mechanical coupling was developed，and unidirectional freezing tests with different water recharge types，fine particle contents，and fine particle types were carried out. The results show that the position of the freezing front is significantly affected by the water recharge method and the content of fine-grained soil，while the influence of the type of fine-grained soil is relatively small. With the increase in the freezing time，both liquid-vapor recharge and vapor recharge lead to the increasing water content of the specimen，while the former changes faster. In addition，the fine-grained soil content and type can significantly affect vapor migration，resulting in significant differences in water distribution. It is difficult for liquid water in coarse-grained soil to directly rise to the freezing front through suction，and vapor migration is an important factor in the development of frost heave. In the long-term operation of high-speed railways，the problems of subgrade water accumulation and frost heave caused by vapor migration cannot be ignored.

Key words： soil mechanics coarse-grained graded packing unidirectional freezing test vapor migration hydrothermal distribution frost heave

引用本文:

刘倩倩1，2，蔡国庆1，2，秦宇腾2，尹凤杰2，李舰2，赵成刚2. 单向冻结条件下粗颗粒级配土的水热分布及冻胀特性研究[J]. 岩石力学与工程学报, 2023, 42(9): 2329-2340.
LIU Qianqian1，2，CAI Guoqing1，2，QIN Yuteng2，YIN Fengjie2，LI Jian2，ZHAO Chenggang2. Experimental study on hydrothermal distribution and frost heave characteristics of coarse-grained graded soil under unidirectional freezing condition. , 2023, 42(9): 2329-2340.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2022.1025 或 http://rockmech.whrsm.ac.cn/CN/Y2023/V42/I9/2329

[17]	张玉芝，马巍，赵维刚，等. 冻融循环作用下非饱和粗颗粒填料水热汽迁移追踪及规律研究[J]. 岩石力学与工程学报，2020，39(1)：156-165.(ZHANG Yuzhi，MA Wei，ZHAO Weigang，et al. Water-heat-vapor migration trace and characteristics of unsaturated coarse-grained filling under freeze and thaw cycles[J]. Chinese Journal of Geotechnical Engineering，2020，39(1)：156-165.(in Chinese))
[20]	GAO J，LAI Y，ZHANG M，et al. Experimental study on the water-heat-vapor behavior in a freezing coarse-grained soil[J]. Applied Thermal Engineering，2018，128：956-965.
[8]	贺佐跃，张升，滕继东，等. 冻土中气态水迁移及其对土体含水率的影响分析[J]. 岩土工程学报，2018，40(7)：1 190-1 197.(HE Zuoyue，ZHANG Sheng，TENG Jidong，et al. Vapour transfer and its effects on water content in freezing soils[J]. Chinese Journal of Geotechnical Engineering，2018，40(7)：1 190-1 197.(in Chinese))
[18]	刘建龙，滕继东，张升，等. 气态水迁移诱发非饱和粗粒土冻胀的试验研究[J]. 岩土工程学报，2021，43(7)：1 297-1 305.(LIU Jianlong，TENG Jidong，ZHANG Sheng，et al. Experimental study on frost heave in unsaturated coarse-grained soil caused by vapour transfer[J]. Chinese Journal of Geotechnical Engineering，2021，43(7)：1 297-1 305.(in Chinese))
[1]	LIN Z，NIU F，LI X，et al. Characteristics and controlling factors of frost heave in high-speed railway subgrade，Northwest China[J]. Cold Regions Science and Technology，2018，153：33-44.
[2]	张玉芝，杜彦良，孙宝臣，等. 季节性冻土地区高速铁路路基冻融变形规律研究[J]. 岩石力学与工程学报，2014，33(12)：2 546-2 553. (ZHANG Yuzhi，DU Yanliang，SUN Baochen，et al. Roadbed deformation of high-speed railway due to freezing-thawing process in seasonally frozen regions[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(12)：2 546-2 553.(in Chinese))
[4]	盛岱超，张升，李希. 高速列车与路基冻胀相互作用机制[J]. 岩土工程学报，2013，35(12)：2 186-2 191.(SHENG Daichao，ZHANG Sheng，LI Xi. Effects of train loads on frost heave of embankments[J]. Chinese Journal of Geotechnical Engineering，2013，35(12)：2 186-2 191.(in Chinese))
[6]	NIU F，LI A，LUO J，et al. Soil moisture，ground temperatures，and deformation of a high-speed railway embankment in Northeast China[J]. Cold Regions Science and Technology，2017，133：7-14.
[7]	SAITO H，AIM?NEK J，MOHANTY B P. Numerical analysis of coupled water，vapor，and heat transport in the vadose zone[J]. Vadose Zone Journal，2006，5(2)：784-800.
[9]	YIN X，LIU E，SONG B，et al. Numerical analysis of coupled liquid water，vapor，stress and heat transport in unsaturated freezing soil[J]. Cold Regions Science and Technology，2018，155：20-28.
[10]	宋二祥，仝睿，罗爽，等. 路基土体“时变覆盖效应”的数值模拟分析[J]. 工程力学，2019，36(8)：30-39.(SONG Erxiang，TONG Rui，LUO Shuang，et al. Numerical simulation and analysis of “time-varying canopy effect”of moisture transport in subgrade soil[J]. Engineering Mechanics，2019，36(8)：30-39.(in Chinese))
[12]	姚仰平，韦彬，陈含，等. 锅盖效应的水汽循环规律研究[J]. 岩土力学，2021，42(6)：1 512-1 518.(YAO Yangping，WEI Bin，CHEN Han，et al. Research on the law of water vapor circulation of the pot cover effect[J]. Rock and Soil Mechanics，2021，42(6)：1 512-1 518. (in Chinese))
[14]	张升，贺佐跃，滕继东，等. 非饱和土水汽迁移与相变：两类“锅盖效应”的试验研究[J]. 岩土工程学报，2017，39(5)：961-968.(ZHANG Sheng，HE Zuoyue，TENG Jidong，et al. Water vapor transfer and phase change in unsaturated soils：experimental study on two types of canopy effect[J]. Chinese Journal of Geotechnical Engineering，2017，39(5)：961-968.(in Chinese))
[16]	何浩松，滕继东，张升，等. 试论冻害敏感性的合理性[J]. 岩土工程学报，2022，44(2)：224-234.(HE Haosong，TENG Jidong，ZHANG Sheng，et al. Rationality of frost susceptibility of soils[J]. Chinese Journal of Geotechnical Engineering，2022，44(2)：224-234.(in Chinese))
[5]	黎瀚文，张璐璐，冯世进，等. 复杂大气环境作用下高铁路基水分迁移响应[J]. 岩土力学，2018，39(7)：2 574-2 582.(LI Hanwen，ZHANG Lulu，FENG Shijin，et al. Moisture migration in a high-speed railway embankment under complex atmospheric environment[J]. Rock and Soil Mechanics，2018，39(7)：2 574-2 582.(in Chinese))
[15]	雷华阳，张文振，冯双喜，等. 水汽补给下砂土水分迁移规律及冻胀特性研究[J]. 岩土力学，2022，43(1)：1-14.(LEI Huayang，ZHANG Wenzhen，FENG Shuangxi，et al. On water migration and frost heaving characteristics of sand under water vapor recharge[J]. Rock and Soil Mechanics，2022，43(1)：1-14.(in Chinese))
[3]	蔡德钩. 高速铁路季节性冻土路基冻胀时空分布规律试验[J]. 中国铁道科学，2016，37(3)：16-21.(CAI Degou. Test on frost heaving spatial-temporal distribution of high speed railway subgrade in seasonal frozen soil region[J]. China Railway Science，2016，37(3)：16-21.(in Chinese))
[13]	TENG J，SHAN F，HE Z，et al. Experimental study of ice accumulation in unsaturated clean sand[J]. Géotechnique，2019，69(3)：251-259.
[11]	王铁行，贺再球，赵树德，等. 非饱和土体气态水迁移试验研究[J]. 岩石力学与工程学报，2005，24(18)：3 271-3 275.(WANG Tiehang，HE Zaiqing，ZHAO Shude，et al. Experimental study on vaporous water transference in loess and sandy soil[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(18)：3 271-3 275.(in Chinese))
[21]	杜晓燕，叶阳升，张千里，等. 高速铁路路基微冻胀填料冻胀发育机制研究[J]. 铁道标准设计，2019，63(6)：30-33.(DU Xiaoyan，YE Yangsheng，ZHANG Qianli，et al. Frost heave mechanism analysis of coarse grained soil for high speed railway subgrade[J]. Railway Standard Design，2019，63(6)：30-33.(in Chinese))
[19]	中华人民共和国行业标准编写组. TB 10202—2002 铁路路基施工规范[S]. 北京：中国铁道出版社，2002.(The Professional Standard Compilation Group of the People?s Republic of China. TB 10202—2002 Code for construction of railway subgrade[S]. Beijing：China Railway Press，2002.(in Chinese))