饱和过程中黏土岩变形和水化膨胀特性研究

doi:10.13722/j.cnki.jrme.2022.0633

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Abstract In the in-situ state，the clay rock is saturated，but in the actual laboratory study，the clay rock has lost water and is unsaturated due to the influence of drilling core，transportation，storage，and processing. Therefore，restoring the clay rock to the in-situ saturation state as far as possible before the further experimental test is an important prerequisite for further experimental tests. This paper takes clay rock as the research object，through the clay rock saturation test without external force and the saturation test under in-situ stress，the focus is on the hydration expansion properties of clay rock and the deformation law in the process of saturation from a macro and mesoscopic perspective. The research shows that with different water saturation time，under the action of no external force，the claystone with central circular pores gradually fills the original pores due to the expansion，disintegration and mixed accumulation of clay minerals. Under the in-situ stress，the action of brine still causes the rapid hydration and expansion of the clay minerals in the clay rock，and the macroscopic appearance of the sample volume increases rapidly while the porosity increases significantly. The expansion deformation is negatively correlated with the initial saturation of the sample. Further，based on the Comsol Multiphysics multi-field coupled finite element，the fluid flow module in the software establishes the geometric model of the clay rock sample and carries out the numerical simulation of the saturation process of the clay rock. Finally，pore pressure coefficient B during saturation and the effect of loading steps on the clay rock saturation process are discussed. The research results will provide experimental guidance and theoretical basis for the related research on the physio-mechanical properties of clay rocks and other rocks.

Key words： rock mechanics clay rock saturation deformation law hydration swelling

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	YU Hongdan1
	CHEN Weizhong1
	TAN Xianjun1
	LEI Jiang2
	ZHAO Wusheng1

Cite this article:

YU Hongdan1,CHEN Weizhong1,TAN Xianjun1, et al. Deformation and hydration swelling characteristics of clay rock during saturation[J]. , 2022, 41(S2): 3534-3542.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.0633 OR http://rockmech.whrsm.ac.cn/EN/Y2022/V41/IS2/3534

[3]	BIBHASH K，JAGDISH P S. Stability of unsupported circular tunnels in anisotropic normally and over consolidated saturated clay[J]. Computers and Geotechnics，2021，135：104148.
[14]	YU H D，CHEN W Z，LI X L，et al. A transversely isotropic damage model for boom clay[J]. Rock Mechanics and Rock Engineering，2014，47：207–219.
[36]	BLACK D，ASCE A M，LEE K L，et al. Saturating laboratory samples by back pressure[J]. Journal of the Soil Mechanics and Foundations Division，1973，99：75–93.
[6]	赵建磊，王涛，梁昌玉，等. 基于风化红层泥岩蠕变特性的滑坡时效变形研究—以天水雒堡村滑坡为例[J]. 中国地质灾害与防治学报，2022(待刊).(ZHAO Jianlei，WANG Tao，LIANG Changyu，et al. Analysis on time-dependent deformation of the landslide in weathered red mudstone based on its creep characteristics—A case study of the Luobao Landslide in Tianshui of Gansu Province[J]. The Chinese Journal of Geological Hazard and Control，2022(to be pressed).(in Chinese))
[17]	MAIGRE D，TESSIER D，GRUNBERGER D，et al. Evolution of microstructures and of macroscopic properties of some clays during experimental compaction[J]. Marine and Petroleum Geology，1998，15(2)：109–128.
[23]	YU H D，CHEN W Z，GONG Z，et al. Influence of temperature on the hydro-mechanical behavior of Boom Clay[J]. International Journal of Rock Mechanics and Mining Sciences，2018，108：189–197.
[39]	HORSEMAN S T，WINTER M G，ENTWISTLE D C. Geotechnical characterization of Boom Clay in relation to the disposal of radiactive waste[R] . [S. l.]：[s. n.]，1987.
[2]	YU H D，LU C，CHEN W Z，et al. An insight into the creep mechanisms of a clayey soil through long-term consolidation tests[J]. Bulletin of Engineering Geology and the Environment，2021，80：9 127–9 139.
[13]	NAUMANN M，HUNSCHE U，SCHULZE O. Experimental investigations on anisotropy indilatancy，failure and creep of Opalinus Clay[J]. Physics and Chemistry of the Earth，2007，32(8/14)：889–895.
[24]	YU H D，CHEN W Z，GONG Z，et al. Loading-unloading behavior of a clayey rock under thermo-hydro-mechanical conditions[J]. International Journal of Rock Mechanics and Mining Sciences，2021，148：104966.
[25]	LIMA A. Thermo-hydro-mechanical behaviour of two deep Belgian clay formations：Boom and Ypresian clays[Ph. D. Thesis][D]. Spain：Universitat Politècnica de Catalunya，2011.
[11]	NEUZIL C E. Permeability of clays and shales[J]. Annual Review of Earth and Planetary Sciences，2019，47(1)：247–273.
[22]	CHEN W Z，MA Y S，YU H D，et al. Effects of temperature and thermally-induced microstructure change on hydraulic conductivity of Boom Clay[J]. Journal of Rock Mechanics and Geotechnical Engineering，2017，9(3)：383–395.
[33]	MESRI G，ADACHI K，ULLRICH C R. Pore-pressure response in rock to undrained change in all-round stress[J]. Geotechnique，1976，26(2)：317–330.
[28]	陈卫忠，于洪丹，贾善坡，等. 双联动软岩渗流–应力耦合流变仪的研制[J]. 岩石力学与工程学报，2009，28(11)：11–12.(CHEN Weizhong，YU Hongdan，JIA shanpo，et al. Development of a double linkage triaxial testing machine for hydro-mechanical coupling in soft rock[J]. Chinese Journal of Rock and Soil Mechanics，2009，(28)：11–12.(in Chinese))
[30]	DENG Y F，CUI Y J，TANG A M，et al. Investigating the pore-water chemistry effects on the volume change behaviour of Boom clay[J]. Physics and Chemistry of the Earth，2011，36(17/18)：1 905–1 912.
[32]	于洪丹，陈卫忠，郭小红，等. 厦门海底隧道强风化花岗岩力学特性研究[J]. 岩石力学与工程学报，2010，29(2)：381–387.(YU Hongdan，CHEN Weizhong，GUO Xiaohong，et al. Research on mechanical characteristics of strongly weathered granite for Xiamen subsea tunnel[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(2)：381–387.(in Chinese))
[35]	曾国熙. 正常固结黏性土不排水剪切的归一化性状[C]// 软土地基学术讨论会论文集. 北京：水利出版社，1980：13–26.(ZENG Guoxi. Normalized behavior of undrained shear of normally consolidated cohesive soil[C]// Proceedings of the Symposium on soft soil foundation. Beijing：Water Conservancy Press，1980：13–26.(in Chinese))
[41]	于洪丹，陈卫忠，卢琛，等. 黏土岩时效变形特性试验与理论研究[J]. 岩土力学，2022，43(2)：317–326.(YU Hongdan，CHEN Weizhong，LU Chen，et al. Experimental and theoretical study of the time-dependent deformation characteristics of clayey rock[J]. Rock and Soil Mechanics，2022，43(2)：317–326.(in Chinese))
[4]	SHI J W，DING C，NG C W W，et al. Effects of overconsolidation ratio on tunnel responses due to overlying basement excavation in clay[J]. Tunnelling and Underground Space Technology，2020，97：103247.
[16]	PIRIYAKUL K. Anisotropic stress-strain behaviour of Belgian Boom clay in the small strain region[Ph. D. Thesis][D]. Ghent：University of Ghent，2006.
[9]	PRADHAN，SM，KATTI KS，et al. Evolution of molecular interactions in the interlayer of Na-Montmorillonite swelling clay with increasing hydration[J]. International Journal of Geomechanics，2015，15(5)：04014073.
[15]	AL-MUKHTAR M，BELANTEUR N，TESSIER D，et al. The fabric of a clay soil under controlled mechanical and hydraulic stress states[J]. Applied Clay Science，1996，11(2/4)：99–115.
[20]	GIRAUD A，ROUSSET G. Time-dependent behaviour of deep clays[J]. Engineering Geology，1996，41(1/4)：181–195.
[26]	杨魁. 蒙脱石吸水膨胀规律的分析及应用[J]. 四川建筑科学研究，2008，34(5)：152–154.(YANG Kui. Analyzing and applying the swelling characteristics of absorbent sodium montmorillinite[J]. Sichuan Building Science，2008，34(5)：152–154.(in Chinese))
[31]	DELAGE P，LE T T，TANG A，et al. Suction effects in deep Boom Clay block samples[J]. Géotechnique，2007，57(2)：239–244.
[37]	DE-BEER A，CARPENTIER R，MANFROY P，et al. Preliminary studies of an underground facility for nuclear waste burial in a tertiary clay formation[C]// Rock store conference. Stockholm：[s. n.]，1977：771–780.
[42]	COLL C，COLLIN F，RADU J P，et al. Long term behaviour of boom clay，Influence of clay viscosity on the far field pore pressure distribution[R]. [S. l.]：[s. n.]，2008.
[27]	于洪丹. Boom Clay渗流–应力耦合长期力学特性研究[博士学位论文][D]. 武汉：中国科学院武汉岩土力学研究所，2010.(YU Hongdan. Study on long term hydro-mechanical coupled behavior of Belgium Boom Clay[Ph. D. Thesis][D]. Wuhan：Institute of Rock and Soil Mechanics，Chinese academy of sciences，2010.(in Chinese))
[1]	CHEN G，DIZIER A，LI X，et al. Numerical prediction of the large-scale in situ praclay heater test in the boom clay[J]. Rock Mechanics and Rock Engineering，2021，54：2 197–2 218.
[29]	BéSUELLE P，VIGGIANI G，DESRUES J，et al. A laboratory experimental study of the hydromechanical behavior of Boom clay[J]. Rock Mechannics and Rock Engineering，2014，47：143–155.
[5]	YANG S Q，TIAN W L，JING H W，et al. Deformation and damage failure behavior of mudstone specimens under single-stage and multi-stage triaxial compression[J]. Rock Mechanics and Rock Engineering，2019，52：673–689.
[7]	BASTIAENS W，BERNIER F，LI X L. SELFRAC：experiments and conclusions on fracturing，self-healing and self-sealing processes in clays[J]. Phys Chem Earth，2007，32(8/14)：600–615.
[34]	DROPEK R K，JOHNSON J N，WALSH J B. The influence of pore pressure on the mechanical properties of Kayenta sandstone[J]. Journal of Geophysical Research，1978，83(6)：2 817–2 824.
[10]	MA Y S，CHEN W Z，YU H D，et al. Variation of the hydraulic conductivity of Boom Clay under various thermal-hydro-mechanical conditions[J]. Engineering Geol.，2016，212：35–43.
[40]	LE T T. Comportement thermo-hydro-mécanique de l?argile de Boom [Ph. D. Thesis][D]. Paris：Ecole Nationale des Ponts et Chaussées，2008.
[12]	DEBECKER B，VERVOORT A，WEVERS M. Self-healing in clay formations，studied by acoustic emission[C]// Proceedings of European Commission CLUSTER. Luxembourg：[s. n.]，2003：261–265.
[18]	WEMAERE I，MARIVOET J，LABAT S. Hydraulic conductivity variability of the Boom Clay in north-east Belgium based on four core drilled boreholes[J]. Physics and Chemistry of the Earth，2008，33：S24–S36.
[38]	BALDI G，HUECKEL T，PEANO A，et al. Developments in modeling of thermo-hydro-geomechanical behaviour of Boom clay and clay-based buffer materials[R]. [S. l.]：[s. n.]，1991.
[8]	MONFARED M，SULEM J，DELAGE P，et al. On the THM behaviour of a sheared Boom Clay sample：application to the behaviour and sealing properties of the EDZ[J]. Engineering Geology，2012，124：47–58.
[19]	YU H D，CHEN W Z，GONG Z，et al. Creep behavior of Boom Clay[J]. International Journal of Rock Mechanics and Mining Sciences，2015，76：256–264.
[21]	CHEN G J，MAES T，VANDERVOORT F，et al. Thermal impact on damaged Boom Clay and Opalinus Clay：permeameter and isostatic tests with CT scanning[J]. Rock Mechanics and Rock Engineering，47：87–99.