盐渍土路基水–盐–热–力耦合理论及数值研究

doi:10.3724/1000-6915.jrme.2024.0273

Abstract
Figure/Table
References (0)
Related Citation (15)

Download: PDF (1043 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract In order to study the distribution of coupled physical fields in the subgrade of saline soil，relying on the subgrade of Qinghai—Xizang Railway around Qinghai Lake，based on the modified traditional salt field equation，a water-salt-heat-force coupled mathematical model was established using the COMSOL custom partial differential equation and solid mechanics field module. By analyzing the physical field characteristics of groundwater buried under the condition of water and salt recharge at the boundary of open system，the evolution laws of moisture，temperature，salt，and displacement field within the soil mass were obtained. The results show that the soil moisture content shows a four-stage development trend of decreasing firstly，increasing rapidly，then decreasing slightly，and stabilizing finally in the region from the subgrade surface to the depth of －0.4 m，and the peak moisture content increases by 2.65 % compared with the valley value. The salt content of subgrade increases initially and then stabilizes in the region from －0.4 m to －2 m of subgrade，the maximum salt content increases by 2% per meter on average，and the growing rate is proportional to the depth. The response of soil temperature to external temperature change has obvious lag phenomenon under －2 m depth of subgrade，and the lag time is about 30 d for each 1m depth increase. The maximum expansion displacement and salt frost heave height difference are 1.42 cm and 2.64 cm respectively，and the winter expansion displacement accounts for more than 32.2% of the salt frost heave displacement.

Key words： soil mechanics saline frozen soil multi-field coupling water-salt and thermal mass transfer salt frost heave height difference expansion displacement

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	TANG Xianxi1
	FENG Suhang1
	ZHANG Shouhong2
	QU Jingye1

Cite this article:

TANG Xianxi1,FENG Suhang1,ZHANG Shouhong2, et al. Theory and numerical study of coupled water-salt-heat-force in saline soil subgrade[J]. , 2025, 44(S1): 250-261.

URL:

https://rockmech.whrsm.ac.cn/EN/10.3724/1000-6915.jrme.2024.0273 OR https://rockmech.whrsm.ac.cn/EN/Y2025/V44/IS1/250

[1]	马钦. 孔隙尺度下冻土冻胀特性的数值模拟及实验研究[硕士学位论文摘要][D]. 哈尔滨：哈尔滨工业大学，2017.(MA Qin. Numerical and experimental study on frost heave characteristics of frozen soils at pore scale[M. S. Thesis][D]. Harbin：Harbin Institute of Technology，2017.(in Chinese))
[2]	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))
[3]	周凤玺，巨文涛，张留俊. 单向冻结条件下硫酸盐渍土热质迁移及变形特性研究[J]. 岩土力学，2023，44(3)：708-716.(ZHOU Fengxi，JU Wentao，ZHANG Liujun. Thermal mass transfer and deformation characteristics of sulphate saline soil under unidirectional freezing[J]. Rock and Soil Mechanics，2023，44(3)：708-716.(in Chinese))
[4]	罗崇亮，余云燕，张璟，等. 硫酸盐渍土热-质迁移试验与耦合模型[J]. 西南交通大学学报，2023，58(2)：470-478.(LUO Chongliang，YU Yunyan，ZHANG Jing，et al. Heat-mass transfer test and coupling model of sulfate saline soil[J]. Journal of Southwest Jiao-tong University，2023，58(2)：470-478.(in Chinese))
[5]	曹元兵，盛煜，吴吉春，等. 上边界条件对多年冻土地温场数值模拟结果的影响分析[J]. 冰川冻土，2014，36(4)：802-810.(CAO Yuanbing，SHENG Yu，WU Jichun，et al. Influence of upper boundary conditions on simulated ground temperature field in permafrost regions[J]. Journal of Glaciology and Geocryology，2014，36(4)：802-810.(in Chinese))
[6]	孙立强，任宇晓，闫澍旺，等. 人工冻土冻结过程中热-力耦合的数值模拟方法研究[J]. 岩土工程学报，2015，37(增2)：137-142.(SUN Liqiang，REN Yuxiao，YAN Shuwang，et al. Numerical simulation method for thermal-stress coupling in artificial freezing process[J]. Chinese Journal of Geotechnical Engineering，2015，37(Supp.2)：137-142.(in Chinese))
[7]	路建国，万旭升，刘力，等. 降温过程硫酸钠盐渍土水-热-盐相互作用过程[J]. 哈尔滨工业大学学报，2022，54(2)：126-134.(LU Jianguo，WAN Xusheng，LIU Li，et al. Water-heat-salt interaction of sodium sulfate saline soil during a cooling process[J]. Journal of Harbin Institute of Technology，2022，54(2)：126-134.(in Chinese))
[8]	白青波，李旭，田亚护，等. 冻土水热耦合方程及数值模拟研究[J]. 岩土工程学报，2015，37(增2)：131-136.(BAI Qingbo，LI Xu，TIAN Yahu，et al. Equations and numerical simulation for coupled water and heat transfer in frozen soil[J]. Chinese Journal of Geotechnical Engineering，2015，37(Supp.2)：131-136.(in Chinese))
[9]	薛伟，周毓彦，刘建伟，等. 基于SHAW模型的青藏高原季节冻土区土壤温湿度模拟与评估[J]. 冰川冻土，2023，45(1)：54-66.(XUE Wei，ZHOU Yuyan，LIU Jianwei，et al. Simulation and assessment of soil temperature and moisture in seasonally frozen soil regions of the Tibetan Plateau based on SHAW model[J]. Journal of Glaciology and Geocryology，2023，45(1)：54-66.(in Chinese))
[10]	陈益峰，周创兵，童富果，等. 多相流传输THM全耦合数值模型及程序验证[J]. 岩石力学与工程学报，2009，28(4)：649-665.(CHEN Yifeng，ZHOU Chuangbing，TONG Fuguo，et al. A numerical model for fully coupled THM processes with multiphase flow and code validation[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(4)：649-665.(in Chinese))
[11]	马启民，黄滢冰，南卓铜，等. 青藏高原典型多年冻土区的一维水热过程模拟研究[J]. 冰川冻土，2016，38(2)：341-350.(MA Qimin，HUANG Yingbing，NAN Zhuotong，et al. Simulating one dimensional water-heat processes in a typical permafrost region in the Tibetan Plateau[J]. Journal of Glaciology and Geocryology，2016，38(2)：341-350.(in Chinese))
[12]	汪双杰，崔福庆，陈建兵，等. 基于地气耦合模型的多年冻土区宽幅路基温度场数值模拟[J]. 中国公路学报，2016，29(6)：169-178.(WANG Shuangjie，CUI Fuqing，CHEN Jianbing，et al. Numerical simulations of temperature field for wide subgrade in permafrost regions under earth-atmosphere coupled system[J]. Chinese Journal of Highway and Transport，2016，29(6)：169-178.(in Chinese))
[13]	孙哲，赵林，胡国杰，等. 下边界条件对多年冻土温度场变化数值模拟的影响[J]. 冰川冻土，2021，43(2)：357-369.(SUN Zhe，ZHAO Lin，HU Guojie，et al. Influence of lower boundary conditions on the numerical simulation of permafrost temperature field changes[J]. Journal of Glaciology and Geocryology，2021，43(2)：357-369.(in Chinese))
[14]	余云燕，罗崇亮，崔文豪，等. 冻融循环下盐渍土热质传递及盐冻胀机制[J]. 西南交通大学学报，2025，待刊.(YU Yunyan，LUO Chongliang，CUI Wenhao，et al. Heat mass transfer and salt frost expansion mechanism of saline soil under freeze-thaw cycle[J]. Journal of Southwest Jiaotong University，2025，to be pressed.(in Chinese))
[15]	ABED A A，SOLOWSKI W T. A study on how to couple thermo-hydro-mechanical behavior of unsaturated soils：Physical equations， numerical implementation and examples[J]. Computers and Geotechnics，2017，92：132-155.
[16]	RUTQVIST J，BöRGESSON L，CHIJIMATSU M，et al. The rmohydro mechanics of partially saturated geological media：governing equations and formulation of four finite element models[J]. International Journal of Rock Mechanics and Mining Sciences，2001，38(1)：105-127.
[17]	VILLAR GALICIA M. Thermo-hydro-mechanical characterisation of a bentonite from Cabo de Gata[J]. Publicación técnica(Empresa Nacional de Residuos Radiactivos)，2002，38(1)：95-104.
[18]	THOMAS H R，SANSOM M R. Fully coupled analysis of heat，moisture，and air transfer in unsaturated soil[J]. Journal of Engineering Mechanics，1995，121(3)：392-405.
[19]	郭志光，白冰. 饱和度对多孔介质中热-水-力耦合响应的影响[J]. 岩土工程学报，2018，40(6)：1 021-1 028.(GUO Zhiguang，BAI Bing. Effect of saturation on thermo-hydro-mechanical coupled responses in porous media[J]. Chinese Journal of Geotechnical Engineering，2018，40(6)：1 021-1 028.(in Chinese))
[20]	LU N，LIKOS W J. Unsaturated soil mechanics[M]. [S. l.]：J.Wiley，2004：584.