考虑温度影响的高庙子膨润土强度与变形特性试验研究

doi:10.13722/j.cnki.jrme.2017.0772

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (938 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要为了探讨温度对高庙子膨润土的强度和变形特性的影响，使用高温高压土工三轴仪，共做81个高压高温高庙子(GMZ)膨润土的三轴不排水剪切试验，系统分析干密度、围压、温度和含水率对高庙子膨润土强度与变形特性的影响。结果表明：(1) 围压和干密度对高庙子膨润土的破坏形态的影响很大；无围压及较高干密度时试样均呈现脆性破坏，较高围压和较低干密度时，试样主要呈塑性破坏；(2) 高庙子膨润土的强度随含水率增大而减小；较低干密度时，偏应力–轴向应变曲线的位置随温度升高而上移；但较高干密度时的情况则完全相反；(3) 初始杨氏模量在干密度较低时随温度升高呈现增加的趋势，而在干密度较高时则相反；随着含水率的升高，初始杨氏模量总体上不断减少；(4) 随着温度升高，泊松比增加；干密度和含水率对泊松比的影响不大；(5) 建立高庙子膨润土的黏聚力和内摩擦角随干密度、含水率和温度变化公式。研究成果可为分析缓冲材料的热–水–力耦合性状提供科学依据。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	陈皓1
	2
	3
	吕海波3
	陈正汉4
	秦冰4

关键词 ：土力学, 高庙子膨润土, 高温高压土工三轴仪, 变形强度特性, 强度参数, 变形参数

Abstract：In order to study the deformation and strength characteristics of GMZ bentonite under high temperature and high pressure，undrained triaxial shearing tests were conducted to 81specimens with the high-pressure triaxial apparatus with temperature control. The influences of dry density，confining pressure，temperature and water content on deformation and strength characteristics of GMZ bentonite were investigated. The results show that the failure forms of GMZ bentonite were significantly influenced by confining pressure and dry density. The specimens tested under unconfined conditions were all in brittle failure. The specimens with low dry density under high confining pressure exhibited largely the plastic failure，while those with high dry density exhibited brittle failure. The strength of GMZ bentonite specimens decreases with the increasing of water content. The influence of temperature and dry density on strength is complex. The position of deviator stress-axial strain curves rises with the increasing of temperature for specimens with low dry density，but it behave oppositely for specimens with high dry density. The initial Young’s modulus of the specimen with low dry density also rises with the increasing of temperature，but it?s opposite for specimens with high dry density. The initial Young’s modulus of specimens generally decreases with the increasing of water content. Poisson?s ratio gradually decreases with the increasing of confining pressure for specimens with low dry density，but this tendency is not obvious for specimens with high dry density. Poisson?s ratio is less influenced by temperature and water content. The formulae of cohesion and internal friction angle changing with dry density，water content and temperature were established for GMZ bentonite specimens.

Key words： soil mechanics GMZ bentonite high-temperature and high-pressure triaxial apparatus deformation and strength characteristics strength parameter deformation parameter

引用本文:

陈皓1，2，3，吕海波3，陈正汉4，秦冰4. 考虑温度影响的高庙子膨润土强度与变形特性试验研究[J]. 岩石力学与工程学报, 2018, 37(8): 1962-1979.
CHEN Hao1，2，3，LV Haibo3，CHEN Zhenghan4，QIN Bing4. Strength and volume change of buffer material under high temperature and pressure. , 2018, 37(8): 1962-1979.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2017.0772 或 http://www.rockmech.org/CN/Y2018/V37/I8/1962

[11]	温志坚，神德敬. 高庙子钠基膨润土静力学性能初析[J]. 世界核地质科学，2006，22(4)：211-214.(WEN Zhijian，SHEN Dejing. A preliminary analysis of the statics properties of the GMZ sodium bentonite[J]. World Nuclear Geoscience，2006，22(4)：211-214.(in Chinese))
[29]	CARLSSON T. Interaction in MX-80 bentonite water electrolyte systems[Ph. D. Thesis][D]. Kiruna：University of Luleá，1986.
[27]	FREDLUND D G，RAHARDJO H. Soil mechanics for unsaturated soils[M]. New York：John Wiley and Sons Inc.，1993：248-251.
[2]	潘自强，钱七虎. 高放废物地质处置战略研究[M]. 北京：原子能出版社，2009：3-7.(PAN Ziqiang，QIAN Qihu. Study on geological disposal strategy of high level radioactive waste[M] Beijing：Atomic Energy Publishing House，2009：3-7.(in Chinese))
[4]	刘月妙，徐国庆，刘淑芬，等. 我国高放废物处置库缓冲/回填材料压实膨胀特性研究[J]. 铀矿地质，2001，17(1)：44-47.(LIU Yuemiao，XU Guoqing，LIU Shufen，et al. Study on compaction and swelling property of buffer/backfill material for HLW repository[J]. Uranium Geology，2001，17(1)：44-47.(in Chinese))
[6]	汪龙，方祥位，申春妮，等. 膨润土-砂混合型缓冲/回填材料渗气规律试验研究[J]. 岩石力学与工程学报，2015，34(增1)：3 381- 3 388.(WANG Long，FANG Xiangwei，SHEN Chunni，et al. Experimental study of gas permeability of bentonite-sand mixtures as buffer/backfilling materials[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(Supp.1)：3 381-3 388.(in Chinese))
[7]	沈珍瑶，董威，李国鼎. 高压实膨润土力学性能研究[J]. 岩土工程技术，1998，(4)：45-46.(SHEN Zhenyao，DONG Wei，LI Guoding. Study of mechanical properties for high compaction expansive soil[J]. Geotechnical Engineering Technique，1998，(4)：45-46.(in Chinese))
[16]	梁学海. 高庙子钙基膨润土饱和样强度研究[J]. 四川建筑科学研究，2015，41(1)：161-164.(LIANG Xuehai. Experimental study on strength of saturated GMZ Ca-bentonite[J]. Sichuan Building Science，2015，41(1)：161-164.(in Chinese))
[3]	陈正汉，秦冰. 缓冲/回填材料热-水-力耦合特性及其应用[M]. 北京：科学出版社，2017：8-10.(CHEN Zhenghan，QIN Bing. Coupled thermos-hydro--mechanical properties of buffer/backfill material and its application[M]. Beijing：Science Press，2017：8-10. (in Chinese))
[1]	王驹. 我国高放废物深地质处置战略规划探讨[C]// 中国高放废物地质处置十年进展. 北京：原子能出版社，2004：13-25.(WANG Ju. Strategic planning for deep geological disposal of high level radioactive waste in China[C]// Ten Years? Progress in the Geological Disposal of High Level Radioactive Waste in China. Beijing：Atomic Energy Publishing House，2004：13-25.(in Chinese))
[5]	刘月妙，蔡美峰，王驹，等. 高放废物地质处置库预选缓冲材料压缩性能研究[J]. 铀矿地质，2007，23(2)：91-95.(LIU Yuemiao，CAI Meifeng，WANG Ju，et al. Compressibility of buffer material for HLW disposal in China[J]. Uranium Geology，2007，23(2)：91-95.(in Chinese))
[8]	沈珍瑶，李国鼎. 高压实膨润土渗透性试验研究[J]. 大坝观测与土工测试，1998，22(1)：25-26.(SHEN Zhenyao，LI Guoding. Permeability experiment of highly compacted bentonite[J]. Dam Observation and Geotechnical Tests，1998，22(1)：25-26.(in Chinese))
[10]	CHEN Y G，ZHU C M，YE W M，et al. Effects of solution concentration and vertical stress on the swelling behavior of compacted GMZ01 bentonite[J]. Applied Clay Science，2016，124：11-20.
[12]	温志坚. 中国高放废物处置库缓冲材料物理性能[J]. 岩石力学与工程学报，2006，25(4)：794-800.(WEN Zhijian. Physical property of China?s buffer material for high-level radioactive waste repositories[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(4)：794-800.(in Chinese))
[14]	孙发鑫，陈正汉，秦冰，等. 高庙子膨润土-砂混合料的三向膨胀力特性[J]. 岩石力学与工程学报，2013，32(1)：200-207.(SUN Faxin，CHEN Zhenghan，QIN Bing，et al. Characteristics of three-dimensional swelling pressure of gaomiaozi bentonite-sand mixture[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(1)：200-207.(in Chinese))
[17]	RUTQVIST J，BÖRGESSON L，CHIJIMATSU M，et al. Coupled thermo-hydro-mechanical analysis of a heater test in fractured rock and bentonite at Kamaishi Mine—comparison of field results to predictions of four finite element codes[J]. International Journal of Rock Mechanics and Mining Sciences，2001，38(1)：129-142.
[9]	叶为民，钱丽鑫，王驹. 高压实高庙子膨润土GMZ01的膨胀力特征[J]. 岩石力学与工程学报，2007，36(增2)：3 861-3 865.(YE Weimin，QIAN Lixin，WANG Ju. Characteristics of swelling pressure of densely compacted GaoMiaoZi bentonite GMZ01[J]. Chinese Journal of Rock Mechanics and Engineering，2007，36(Supp.2)：3 861- 3 865.(in Chinese))
[15]	朱国平，刘晓东，杨婷. 高庙子膨润土三轴剪切力学性能研究[C]// 第二届废物地下处置学术研讨会论文集. 敦煌：[s. n.]，2008：205-209.(ZHU Guoping，LIU Xiaodong，YANG Ting. Study on triaxial shear mechanical properties of GaoMiaoZi bentonite[C]// Proceedings on Underground Waste Disposal of the Second Symposium. Dunhuang：[s. n.]，2008：205-209.(in Chinese))
[19]	XU L，YE W M，CHEN B，et al. Experimental investigations on thermo-hydro-mechanical properties of compacted GMZ01 bentonite- sand mixture using as buffer materials[J]. Engineering Geology，2016，213：46-54.
[21]	张发忠，方振东，秦冰，等. 不同温度下膨润土膨胀变形行为研究[J]. 后勤工程学院学报，2017，33(2)：23-27.(ZHANG Fazhong，FANG Zhendong，QIN Bin. et al. Study on Bentonite?s swelling strain behaviour at different temperatures[J]. Journal of Logistical Engineering University，2017，33(2)：23-27.(in Chinese))
[23]	CUI Y J，TANG A M，QIAN L X，et al. Thermal-mechanical behavior of compacted GMZ bentonite[J]. Soils and Foundations，2011，51(6)：1 065-1 074.
[25]	YE W M，ZHENG Z J，CHEN B，et al. Effects of pH and temperature on the swelling pressure and hydraulic conductivity of compacted GMZ01 bentonite[J]. Applied Clay Sciences，2014，101：192-198.
[28]	VILLAR M V，LLORET A. Influence of temperature on the hydro-mechanical behaviour of a compacted bentonite[J]. Applied Clay Science，2004，26(1)：337-350.
[13]	秦冰，陈正汉，刘月妙，等. 高庙子膨润土GMZ001三向膨胀力特性研究[J]. 岩土工程学报，2009，31(5)：756-763.(QIN Bing，CHEN Zhenghan，LIU Yuemiao，et al. Characteristics of 3D swelling pressure of GMZ001 bentonite[J]. Chinese Journal of Geotechnical Engineering，2009，31(5)：756-763.(in Chinese))
[20]	陆飏，方振东，秦冰，等. 温度循环变化下高庙子膨润土持水特性[J]. 后勤工程学院学报，2016，32(1)：69-73.(LU Yang，FANG Zhendong，QIN Bin，et al. Water retention property of GMZ Bentonite under temperature cycles[J]. Journal of Logistical Engineering University，2016，32(1)：69-73.(in Chinese))
[18]	刘月妙，王驹，曹胜飞，等. 中国高放废物地质处置缓冲材料大型试验台架和热-水-力-化学耦合性能研究[J]. 岩土力学，2013，34(10)：2 756-2 762.(LIU Yuemiao，WANG Ju，CAO Shengfei，et al. A large-scale THMC experiment of buffer material for geological disposal of high level radioactive waste in China[J]. Rock and Soil Mechanics，2013，34(10)：2 756-2 762.(in Chinese))
[22]	蒋江红，孙德安. 温度对高庙子膨润土浸水膨胀特性的影响[J]. 上海大学学报：自然科学版，2016，22(10)：1-11.(JIANG Jianghong，SUN Dean. Influence of temperature on swelling characteristics of GMZ bentonite due to wetting[J]. Journal of Shanghai University：Natural Science，2016，22(10)：1-11.(in Chinese))
[24]	YE W M，WAN M，CHEN B，et al. Temperature effects on the swelling pressure and saturated hydraulic conductivity of the compacted GMZ01 bentonite[J]. Environmental Earth Sciences，2013，68(1)：281-288.
[26]	张龙，陈正汉，周凤玺，等. 从变形、强度和水量变化三方面验证非饱和土应力状态变量的合理性[J]. 岩土工程学报，2017，39(5)：905-915.(ZHANG Long，CHEN Zhenghan，ZHOU Fengxi，et al. Verify of rationality of two stress state variables of unsaturated soil from deformation，moisture change and strength[J]. Journal of geotechnical engineering，2017，39(5)：905-915.(in Chinese))
[30]	陈皓. 高放废物地质库缓冲材料在高温高压下的变形强度特性研究[硕士学位论文][D]. 南宁：广西大学，2015.(CHEN Hao. Research of strength and volume change of buffer material in high temperatura and pressure from high- level radioactive waste repository [M. S. Thesis][D]. Nanjing：Guangxi University，2015.(in Chinese))