考虑封闭气相影响的非饱和黄土变形和强度行为

doi:10.13722/j.cnki.jrme.2024.0247

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

Download: PDF (1598 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Loess is susceptible to significant changes in strength and volumetric strain under loading or wetting. In this study，to address the soil response induced by wide variations of saturation under hydro-mechanical action，an elastoplastic model considering the entire possible range of suction and stresses is developed by focusing on the case of multi-phase coupling in unsaturated loess，using the generalized effective stress and modified suction as the stress variables. This model unifies the situation of gas phase closure caused by high saturation into the generalized effective stress framework，introduces the damage parameter for the influence of closed gas on soil，and uniformly describes the deformation and strength of unsaturated loess under wide variations of saturation. The reasonableness and reliability of the model have been verified through the corresponding stress and hydraulic path tests. The results show that the proposed model can better reflect the loading effect of unsaturated loess influenced by the closed gas. It adeptly reflects not only the coupled hardening of the solid-liquid phase but also accurately portrays the influence of closed gas on deformation and strength under different hydro-mechanical actions.

Key words： soil mechanics unsaturated loess closed gas generalized effective stress loading effect constitutive model

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	QIN Biao1
	LI Xi?an1
	WANG Li2
	CHAI Hao1

Cite this article:

QIN Biao1,LI Xi?an1,WANG Li2, et al. Deformation and strength behaviors of unsaturated loess considering the influence of closed gas phase[J]. , 2024, 43(11): 2846-2857.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2024.0247 OR https://rockmech.whrsm.ac.cn/EN/Y2024/V43/I11/2846

[1]	张奇莹，徐盼盼，钱会. 泾阳原状黄土-古土壤序列抗剪强度各向异性及其机制研究[J]. 岩石力学与工程学报，2019，38(11)： 2 365-2 376.(ZHANG Qiying，XU Panpan，QIAN Hui. Study on shear strength anisotropy of undisturbed loess-paleosol sequence in Jingyang county[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(11)：2 365-2 376.(in Chinese))
[2]	LENG Y Q，PENG J B，WANG Q Y，et al. A fluidized landslide occurred in the Loess Plateau：A study on loess landslide in South Jingyang Tableland[J]. Engineering Geology，2018，236：129-136.
[3]	胡海军，王晨，吕彤阳，等. 一维载荷浸水下重塑黄土的水分入渗和增湿变形模型及试验验证[J]. 岩石力学与工程学报，2022，41(5)：1 020-1 030.(HU Haijun，WANG Chen，LV Tongyang，et al. Theoretical model of water movement and wetting-induced deformation for remolded loess under one-dimensional loading- wetting condition and its experimental verification[J]. Chinese Journal of Rock Mechanics and Engineering，2022，41(5)：1 020-1 030.(in Chinese))
[4]	ZHANG W H，ZHAO C G. Micromechanics analysis for unsaturated granular soils[J]. Acta Mechanica Solida Sinica，2011，24(3)：273-281.
[5]	MANAHILOH K N，MUHUNTHAN B，LIKOS W J. Microstructure- based effective stress formulation for unsaturated granular soils[J]. International Journal of Geomechanics，2016，16(6)：D4016006.
[6]	蔡国庆，韩博文，韦靖威，等. 复杂水-力路径下非饱和砂质黄土增湿变形特性[J]. 岩石力学与工程学报，2022，41(增1)：3 073-3 080.(CAI Guoqing，HAN Bowen，WEI Jingwei，et al. Wetting deformation characteristics of unsaturated sandy loess under complex hydro-mechanical paths[J]. Chinese Journal of Rock Mechanics and Engineering，2022，41(Supp.1)：3 073-3 080.(in Chinese))
[7]	CAI G，HAN B，WEI J，et al. Wetting-induced deformation characteristics of unsaturated compacted sandy loess[J]. Acta Geotechnica，2024，19(1)：177-195.
[8]	HAERI S M，SOLEYMANI BORUJERDI S，AKBARI GARAKANI A. Effects of initial shear stress on the hydromechanical behavior of collapsible soils[J]. Acta Geotechnica，2023，18(11)：6 051-6 076.
[9]	于永堂，张龙，郑建国，等. 重塑黄土的钻孔剪切变形与强度特性研究[J]. 岩石力学与工程学报，2021，40(增2)：3 367-3 378. (YU Yongtang，ZHANG Long，ZHENG Jianguo，et al. Study on deformation and strength characteristics of remolded loess by borehole shear test[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(Supp.2)：3 367-3 378.(in Chinese))
[10]	CAI G，LIU Y，LIU Z，et al. Volume change behaviour of an unsaturated compacted loess under thermo-hydro-mechanical loads[J]. Acta Geotechnica，2024，19(4)：2 023-2 040.
[11]	ALONSO E E，GENS A，JOSA A. A constitutive model for partially saturated soils[J]. Géotechnique，1990，40：405-430.
[12]	PETH S，NELLESEN J，FISCHER G，et al. Non-invasive 3D analysis of local soil deformation under mechanical and hydraulic stresses by ?CT and digital image correlation[J]. Soil and Tillage Research，2010，111(1)：3-18.
[13]	FINNO R J，ZHANG Y，BUSCARNERA G. Experimental validation of Terzaghi?s effective stress principle for Gassy sand[J]. Journal of Geotechnical and Geoenvironmental Engineering，2017，143(12)：04017092.
[14]	EGHBALIAN M，POURAGHA M，WAN R. Micromechanical approach to swelling behavior of capillary-porous media with coupled physics[J]. International Journal for Numerical and Analytical Methods in Geomechanics，2019，43(1)：353-380.
[15]	WHEELER S J，SHARMA R S，BUISSON M. Coupling of hydraulic hysteresis and stress-strain behaviour in unsaturated soils[J]. Geotechnique，2003，53(1)：41-54.
[16]	LLORET-CABOT M，WHEELER S J，SANCHEZ M. A unified mechanical and retention model for saturated and unsaturated soil behaviour[J]. Acta Geotechnica，2017，12(1)：1-21.
[17]	侯乐乐，翁效林，李林，等. 考虑含水率影响的结构性黄土临界状态模型[J]. 岩土力学，2022，43(3)：737-748.(HOU Lele，WENG Xiaolin，LI Lin，et al. A critical state model for structural loess considering water content[J]. Rock and Soil Mechanics，2022，43(3)：737-748.(in Chinese))
[18]	LUO T，CHEN D，YAO Y P，et al. An advanced UH model for unsaturated soils[J]. Acta Geotechnica，2020，15(1)：145-164.
[19]	MAHMOODABADI M，BRYSON L S. Constitutive model for describing the fully coupled hydromechanical behavior of unsaturated soils[J]. International Journal of Geomechanics，2021，21(4)：04021027.
[20]	SHENG D，FREDLUND D G，GENS A. A new modelling approach for unsaturated soils using independent stress variables[J]. Canadian Geotechnical Journal，2008，45(4)：511-534.
[21]	刘艳，赵成刚，蔡国庆，等. 考虑气相压力变化和偏应力影响的非饱和土本构模型[J]. 岩土工程学报，2011，33(5)：754-761.(LIU Yan，ZHAO Chenggang，CAI Guoqing，et al. New model for unsaturated soils considering variation of gas pressure and shear stress[J]. Chinese Journal of Geotechnical Engineering，2011，33(5)：754-761.(in Chinese))
[22]	ZHOU A N，SHENG D C. An advanced hydro-mechanical constitutive model for unsaturated soils with different initial densities[J]. Computers and Geotechnics，2015，63：46-66.
[23]	QUEVEDO R，LOPEZ M，ROEHL D. Hydromechanical modeling of unsaturated soils considering compaction effects on soil physical and hydraulic properties[J]. Acta Geotechnica，2024，19(8)：5 051-5 064.
[24]	BURTON G J，PINEDA J A，SHENG D C，et al. Microstructural changes of an undisturbed，reconstituted and compacted high plasticity clay subjected to wetting and drying[J]. Engineering Geology，2015，193：363-373.
[25]	ZHOU A N，WU S S，LI J，et al. Including degree of capillary saturation into constitutive modelling of unsaturated soils[J]. Computers and Geotechnics，2018，95：82-98.
[26]	LI Y R. A review of shear and tensile strengths of the Malan Loess in China[J]. Engineering Geology，2018，236：4-10.
[27]	WHEELER S J. A conceptual model for soils containing large gas bubbles[J]. Géotechnique，1988，38(3)：389-397.
[28]	ZHU B，HUANG J S，WANG L J，et al. Precise numerical study on the behaviour of gassy marine soils subjected to thermal and mechanical loadings[J]. Computers and Geotechnics，2021，DOI：10.1016/j.compgeo.2021.104269.
[29]	VEGA-POSADA C A，FINNO R J，ZAPATA-MEDINA D G. Effect of gas on the mechanical behavior of medium-dense sands[J]. Journal of Geotechnical and Geoenvironmental Engineering，2014，140(11)：04014063.
[30]	HONG Y，WANG X T，WANG L Z，et al. A state-dependent constitutive model for coarse-grained gassy soil and its application in slope instability modelling[J]. Computers and Geotechnics，2021，129：103847.
[31]	GAO Z W，HONG Y，WANG L Z. Constitutive modelling of fine-grained gassy soil：A composite approach[J]. International Journal for Numerical and Analytical Methods in Geomechanics，2020，44(9)：1 350-1 368.
[32]	HONG Y，WANG L Z，NG C W W，et al. Effect of initial pore pressure on undrained shear behaviour of fine-grained gassy soil[J]. Canadian Geotechnical Journal，2017，54(11)：1 592-1 600.
[33]	WHEELER S J. The undrained shear strength of soils containing large gas bubbles[J]. Géotechnique，1988，38(3)：399-413.
[34]	HONG Y，WANG L Z，ZHANG J F，et al. 3D Elastoplastic model for fine-grained gassy soil considering the gas-dependent yield surface shape and stress-dilatancy[J]. Journal of Engineering Mechanics，2020，146(5)：04020037.
[35]	HONG Y，WANG L Z，YANG B，et al. Stress-dilatancy behaviour of bubbled fine-grained sediments[J]. Engineering Geology，2019，260：105196.
[36]	LI X S. Thermodynamics-based constitutive framework for unsaturated soils. 2：A basic triaxial model[J]. Géotechnique，2007，57(5)：423-435.
[37]	SULTAN N，DE GENNARO V，PUECH A. Mechanical behaviour of gas-charged marine plastic sediments[J]. Geotechnique，2012，62(9)：751-766.
[38]	GAO Z W，CAI H J，HONG Y，et al. A critical state constitutive model for gassy clay[J]. Canadian Geotechnical Journal，2022，59： 1 033-1 045.
[39]	SULTAN N，GARZIGLIA S. Mechanical behaviour of gas-charged fine sediments：model formulation and calibration[J]. Geotechnique，2014，64(11)：851-864.
[40]	SHENG D C，ZHOU A N. Coupling hydraulic with mechanical models for unsaturated soils[J]. Canadian Geotechnical Journal，2011，48(5)：826-840.
[41]	MASIN D. Predicting the dependency of a degree of saturation on void ratio and suction using effective stress principle for unsaturated soils[J]. International Journal for Numerical and Analytical Methods in Geomechanics，2010，34(1)：73-90.
[42]	HOULSBY G T. The work input to an unsaturated granular material[J]. Géotechnique，1997，47(1)：193-196.
[43]	侯乐乐，翁效林，崔艺铖，等. K0固结结构性黄土的各向异性本构模型[J]. 岩石力学与工程学报，2022，41(10)：2 124-2 134.(HOU Lele，WENG Xiaolin，CUI Yicheng，et al. Critical state constitutive model of K0 consolidated structural loess[J]. Chinese Journal of Rock Mechanics and Engineering，2022，41(10)：2 124-2 134.(in Chinese))
[44]	LI X S.Thermodynamics-based constitutive framework for unsaturated soils. 1：Theory[J]. Géotechnique，2007，57(5)：411-422.
[45]	COLLINS I F，HILDER T. A theoretical framework for constructing elastic/plastic constitutive models of triaxial tests [J]. International Journal for Numerical and Analytical Methods in Geomechanics，2002，26(13)：1 313-1 347.
[46]	LORET B，KHALILI N. A three-phase model for unsaturated soils[J]. International Journal for Numerical and Analytical Methods in Geomechanics，2000，24(11)：893-927.
[47]	ROMERO E，DELLA VECCHIA G，JOMMI C. An insight into the water retention properties of compacted clayey soils[J]. Geotechnique，2011，61(4)：313-328.
[48]	PATIL U D，HOYOS L R，PUPPALA A J. Modeling essential elastoplastic features of compacted silty sand via suction-controlled triaxial testing[J]. International Journal of Geomechanics，2016，16(6)：D4016012.
[49]	刘艳，韦昌富，赵成刚，等. 一个高饱和度非饱和土的本构模型[J]. 岩土力学，2013，34(8)：2 189-2 194.(LIU Yan，WEI Changfu，ZHAO Chenggang，et al. A constitutive model of unsaturated soils with high saturation[J]. Rock and Soil Mechanics，2013，34(8)： 2 189-2 194.(in Chinese))
[50]	TAMAGNINI R. An extended Cam-clay model for unsaturated soils with hydraulic hysteresis[J]. Géotechnique，2004，54(3)：223-228.
[51]	BUSCARNERA G，NOVA R. An elastoplastic strainhardening model for soil allowing for hydraulic bonding-debonding effects[J]. International Journal for Numerical and Analytical Methods in Geomechanics，2009，33(8)：1 055-1 086.
[52]	张立. 气体封闭的非饱和土本构模型研究[硕士学位论文][D]. 北京：北京交通大学，2019.(ZHANG Li. Study on constitutive model of unsaturated soil withc occluded gas[M. S. Thesis][D]. Beijing：Beijing Jiaotong University，2019.(in Chinese))
[53]	周容名，翁效林，李林，等. 考虑气相硬化的准饱和黏土弹塑性模型[J]. 岩土力学，2022，43(11)：2 963-2 972.(ZHOU Rongming，WENG Xiaolin，LI Lin，et al. Elastoplastic model of quasi-saturated clay considering gas phase hardening[J]. Rock and Soil Mechanics，2022，43(11)：2 963-2 972.(in Chinese))
[54]	ZHANG D，WANG J，CHEN C，et al. The compression and collapse behaviour of intact loess in suction-monitored triaxial apparatus[J]. Acta Geotechnica，2020，15(2)：529-548.
[55]	BURTON G J，SHENG D，AIREY D. Experimental study on volumetric behaviour of Maryland clay and the role of degree of saturation[J]. Canadian Geotechnical Journal，2014，51(12)：1 449-1 455.
[56]	牛丽思，张爱军，王毓国，等. 高易溶盐非饱和伊犁原状黄土的临界状态特性[J]. 岩土力学，2020，41(8)：2 647-2 658.(NIU Lisi，ZHANG Aijun，WANG Yuguo，et al. Critical state characteristics of high soluble salt unsaturated undisturbed Ili loess[J]. Rock and Soil Mechanics，2020，41(8)：2 647-2 658.(in Chinese))
[57]	张登飞，陈存礼，杨炯，等. 侧限条件下增湿时湿陷性黄土的变形及持水特性[J]. 岩石力学与工程学报，2016，35(3)：604-612. (ZHANG Dengfei，CHEN Cunli，YANG Jiong，et al. Deformation and water retention behaviour of collapsible loess during wetting under lateral confinement[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(3)：604-612.(in Chinese))
[58]	牛丽思. 考虑易溶盐含量的伊犁黄土非饱和弹塑性本构模型[博士学位论文][D]. 杨林：西北农林科技大学，2021.(NIU Lisi. Unsaturated elastoplastic constitutive model of Ili loess considering soluble salt content[Ph. D. Thesis][D]. Yanglin：Northwest A and F University，2021.(in Chinese))
[59]	ARUNASALAM R. Coupling of mechanical behaviour and water retention behaviour in unsaturated soils[Ph. D. Thesis][D]. Glasgow，United Kingdom；University of Glasgow，2009.