深圳大学学报理工版

冯德刚,郝东苗,张明礼,等.填料类型对季节冻土区覆盖效应的影响[J].深圳大学学报理工版,2022,39(01):59-66.[doi:10.3724/SP.J.1249.2022.01059]
FENG Degang,HAO Dongmiao,ZHANG Mingli,et al.Influence of subgrade filling types on covering effect in seasonally frozen soil area[J].Journal of Shenzhen University Science and Engineering,2022,39(01):59-66.[doi:10.3724/SP.J.1249.2022.01059]

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填料类型对季节冻土区覆盖效应的影响

冯德刚¹，郝东苗²，张明礼^2,3，严艳锋¹，周志雄²，张瑞玲²，李广²

1.中交第三公路工程局桥梁隧道工程有限公司，北京100012;2.兰州理工大学土木工程学院，兰州730050;3.甘肃省科学院地质自然灾害防治研究所，兰州730021

关键词：岩土工程;冻土工程;覆盖效应;路基填料;数值模拟;水汽迁移;季节冻土;多场耦合

Influence of subgrade filling types on covering effect in seasonally frozen soil area

FENG Degang¹，HAO Dongmiao²，ZHANG Mingli^2,3，YAN Yanfeng¹，ZHOU Zhixiong²，ZHANG Ruiling²，LI Guang²

1.Bridge and Tunnel Engineering Co. Ltd. , CCCC Third Highway Engineering Co. Ltd. , Beijing 100012, P. R. China;2.School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu Province, P. R. China;3.Geological Hazards Prevention Institute, Gansu Academy of Sciences, Lanzhou 730021, Gansu Province, P. R. China

Keywords：geotechnical engineering; permafrost engineering; covering effect; subgrade filling; numerical simulation;vapor migration;seasonally frozen soil;multi-field coupling

DOI: 10.3724/SP.J.1249.2022.01059

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参考文献

季节冻土区高速公路路面的大面积覆盖层使得路基填料内部水分在外界温度梯度和路面隔水作用下向上迁移并累积，加剧了路基的冻胀和融沉危害．通过室内试验，重现了季节冻土地区路基覆盖效应形成过程，建立非饱和土的“水-汽-热”模型，仿真分析中国兰州某地区不同路基填料覆盖效应形成过程和差异．结果表明，季节温度作用下土体水分向不透水层底部聚集，且聚集现象随着冻融循环次数的增加而加剧；当路基填料分别为砂土、粉土和粉质黏土时，由于填料导热性能和持水性能的差异，最大冻结深度分别为1.21、0.97和0.89m；不同覆盖层下的水分运移均以水汽为主，以粉土作为填料时的水汽迁移现象最明显，砂土、粉质黏土和粉土填料路基对应的水分迁移量分别为0.68%、2.86%和12.56%，三者水分聚集深度依次变浅．可见在已有的粉土路基工程中应重点防治水汽迁移引起的路基病害．

The existence of a large area of expressway pavement in seasonally frozen soil region causes the moisture in roadbed filler to migrate upward and accumulate under the action of external temperature gradient and road barrier which aggravates the frost heave and thaw settlement of the subgrade. The formation process of subgrade covering effect in seasonally frozen soil area is reproduced by laboratory experiment. The water-vapor-heat model of unsaturated soil is established to simulate the formation process and difference of different subgrade filling cover effect in a certain area of Lanzhou. The results show that under the effect of seasonal temperature changes，soil water accumulates to the bottom of the impervious layer，and the accumulation phenomenon intensifies with freezing-thawing cycles. When the subgrade fillings are sandy soil，silty soil and silty clay，the maximum frozen depths are 1.21，0.97 and 0.89 m，respectively，due to the difference in thermal conductivity and soil moisture diffusivity of the fillings. Water vapor migration dominates the water transport in shallow ground，which is most significant in silty soil. Water accumulations of sandy soil，silty clay and silty soil subgrade are 0.68%，2.86% and 12.56%， respectively. The accumulation depth becomes shallower in turn. It is important to prevent and control the subgrade hazards caused by water vapor migration in the existing subgrade engineering.

引言
1 室内覆盖效应试验
2 路基覆盖效应理论模型
3 不同填料下覆盖效应差异分析
4 结论

[1]周幼吾，郭东信，程国栋，等. 中国冻土[M]. 北京：科学出版社，2000：37-41. ZHOU Youwu, Guo Dongxin, CHENG Guodong, et al. Geocryology in China [M]. Beijing: Science Press, 2000:37-41. (in Chinese)
[2]李强，姚仰平，韩黎明. 土体的“锅盖效应”[J].工业建筑，2014，44（2）：69-71. LI Qiang, YAO Yangping, HAN Liming, et al. Pot-cover effect of soil [J]. Industrial Construction, 2014, 44(2): 69-71. (in Chinese)
[3]张明礼，张瑞玲，冯德刚，等. 寒区工程锅盖效应病害调查与防治研究进展[J]. 科学技术与工程，2021， 21（19）：7863-7873. ZHANG Mingli, ZHANG Ruiling, FENG Degang, et al.Engineering diseases investigation and research progress on prevention of the pot-cover effect in cold regions [J]. Science Technology and Engineering, 2021, 21(19): 7863-7873. (in Chinese)
[4]胡和平，杨诗秀，雷志栋. 土壤冻结时水热迁移规律的数值模拟[J]. 水利学报，1992，23（7）：1-8. HU Heping, YANG Shixiu, LEI Zhidong. A numerical simulation for heat and moisture transfer during soil freezing [J]. Journal of Hydraulic Engineering, 1992, 23 (7): 1-8. (in Chinese)
[5]王乃东，马梓棋，姚仰平. 试验时间和初始含水率对土体水气迁移的影响分析[J]. 工业建筑，2016，46 （9）：13-16. WANG Naidong, MA Ziqi, YAO Yangping, et al. Analysis of moisture migration affected by test period and initial water content [J]. Industrial Construction, 2016, 46(9): 13-16. (in Chinese)
[6]罗汀，陈含，姚仰平. 寒区路基土锅盖效应气态水迁移试验研究[J]. 天津大学学报自然科学与工程技术版，2019，52（增刊1）：29-34. LUO Ting, CHEN Han, YAO Yangping, et al. Experi⁃mental study on vapor transfer under pot-cover effect of subgrade soil in cold regions [J]. Journal of Tianjin Uni⁃versity Science and Technology, 2019, 52(Suppl. 1): 29-34. (in Chinese)
[7]罗汀，曲啸，姚仰平，等. 北京新机场“锅盖效应”一维现场试验[J]. 土木工程学报，2019，52（增刊1）：233-239. LUO Ting, QU Xiao, YAO Yangping, et al. One-dimensional field test study on‘pot cover effect’of Bei⁃jing New Airport [J]. China Civil Engineering Journal, 2019, 52(Suppl. 1): 233-239. (in Chinese)
[8]MILLY P C D. A simulation analysis of thermal effects on evaporation from soil [J]. Water Resources Research, 1976, 12: 513-522.
[9]SAKAI M, TORIDE N, ŠIMUNEK J. Water and vapor movement with condensation and evaporation in a sandy column [J]. Soil Science Society of America Journal, 2009, 73(3): 707.
[10]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）：1190-1197. 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): 1190-1197. (in Chinese)
[11]LIU F F, MAO X S, XU C, et al. “Covering effects ”under diurnal temperature variations in arid and semiarid areas [J]. Advances in Civil Engineering, 2020(5): 1-12.
[12]ZHANG M L, WEN Z, XUE K, et al. A coupled model for liquid water, water vapor and heat transport of satu⁃rated and unsaturated soil in cold regions model formu⁃lation and verification [J]. Environmental Earth Sciences, 2016, 75(8): 1-19.
[13]张明礼，温智，董建华，等. 多年冻土活动层浅层包气带水-汽-热耦合运移规律研究[J]. 岩土力学， 2018，39（2）：561-570. ZHANG Mingli, WEN Zhi, DONG Jianhua, et al. Coupled water-vapor-heat transport in shallow unsaturated zone of active layer in permafrost regions [J]. Rock and Soil Mechanics, 2018, 39(2): 561-570. (in Chinese)
[14]张明礼，郭宗云，韩晓斌，等. 基于COMSOL Multi⁃physics数学模块的冻土水热耦合分析[J]. 科学技术与工程，2018，18（33）：7-12. ZHANG Mingli, GUO Zongyun, HAN Xiaobin, et al. Analysis of coupled water and heat transfer in frozen soil based on mathematical module of COMSOL Multiphysics [J]. Science Technology and Engineering, 2018, 18(33): 7-12. (in Chinese)
[15]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)
[16]杨高升，白冰，姚晓亮，等. 非饱和冻土水汽迁移与相变过程的光滑粒子法模拟[J]. 岩土力学，2021， 42（1）：291-300. YANG Gaosheng, BAI Bing, YAO Xiaoliang, et al. Smoothed particle hydrodynamics for simulation of water vapor migration and phase change in unsaturated frozen soil [J]. Rock and Soil Mechanics, 2021, 42(1): 291-300. (in Chinese)
[17]毛雪松，马骉. 基于水热耦合效应的冻土路基稳定性研究[M]. 北京：人民交通出版社，2011：118-153. MAO Xuesong, MA Biao. Studies on the stability of permafrost subgrade based on coupled water and heat transfer [M]. Beijing: China Communications Press, 2011:118-153. (in Chinese)
[18]MUALEM Y. A new model for predicting the hydraulic conductivity of unsaturated porous media [J]. Water Resources Research, 1976, 12(3): 513-522.
[19]SAITO H, SIMUNEK 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.
[20]张明礼，温智，董建华，等. 考虑降雨作用的多年冻土区不同地表土质活动层水热过程差异分析[J]. 岩土力学，2020，41（5）：1549-1559. ZHANG Mingli, WEN Zhi, DONG Jianhua, et al. Response of hydrothermal activity in different types of soil at ground surface to rainfall in permafrost region [J]. Rock and Soil Mechanics, 2020, 41(5): 1549-1559. (in Chinese)
[21]徐斅祖，王家澄，张立新. 冻土物理学[M]. 北京：科学出版社，2010：85-89. XU Xiaozu, WANG Jiacheng, ZHANG Lixin. Physics of frozen soil [M]. Beijing: Science Press, 2010: 85-89. (in Chinese)
[22]朱林楠. 高原冻土区不同下垫面的附面层研究[J]. 冰川冻土，1988，10（1）：8-14. ZHU Linnan. Study on boundary layer of different underlying surface in plateau permafrost region [J]. Jour⁃nal of Glaciology and Geocryology, 1988, 10(1): 8-14. (in Chinese)