考虑结构性的软岩热弹塑性本构模型研究

doi:10.13722/j.cnki.jrme.2015.1734

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (472 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要在核废料贮存、地热和深部采矿等领域中，温度对软岩力学特性的影响不容忽视。基于上负荷面和温度等效应力概念，提出一个考虑结构性的软岩热弹塑性模型。该模型比上负荷面模型仅多一个参量，即线性热膨胀系数。计算分析及其与试验结果对比表明，该模型既能够统一描述软岩热增强和热减弱2种现象。软岩初始结构性愈强，强度愈大，且初始结构性的变化可使软岩在热增强和热减弱之间相互转换。无论热增强或者热减弱，线性热膨胀系数越大或者温度越高，结构性状态变量的消散均会加快；并且，当线性热膨胀系数和温度均较高时，这种加速趋势会更为显著；相较于热减弱和热增强情况下的结构性更容易消散，即消散速率更快。

	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
	张升1
	2
	贺佐跃1
	2
	滕继东1
	2
	张锋3

关键词 ：岩石力学, 线性热膨胀系数, 本构模型, 弹塑性

Abstract：In the fields of nuclear waste landfill，geothermy and deep mining，the effects of temperature on the mechanical behaviors of soft rocks cannot be neglected. A thermo-elasto-plastic model of soft rocks considering structure was proposed based on the super loading yield surface and the concept of temperature-deduced equivalent stress. Compared to the super loading yield surface，only one more parameter is added，i.e.，the linear thermal expansion coefficient. The predicted results and the test results show that the proposed model is capable of describing both the phenomenons of heat-increase and heat-decrease of soft rocks. The stronger the initial structure，the larger the strength of soft rocks. The phenomenons of heat-increase and heat-decrease switch from each other due to the change of the initial structure of soft rocks. Furthermore，no matter whether the heat-increase or heat-decrease，a larger linear thermal expansion coefficient or a greater temperature，always leads to much more rapid dissipation of the structure. When the linear thermal expansion coefficient and temperature are larger at the same time，the dissipation trend will be more obvious. Lastly，the structure dissipates more easily in the case of heat-increase than in the heat-decrease.

Key words： rock mechanics linear thermal expansion coefficient constitutive model elastoplastic

引用本文:

张升1，2，贺佐跃1，2，滕继东1，2，张锋3. 考虑结构性的软岩热弹塑性本构模型研究[J]. 岩石力学与工程学报, 2017, 36(3): 571-578.
ZHANG Sheng1，2，HE Zuoyue1，2，TENG Jidong1，2，ZHANG Feng3. A thermo-elasto-plastic model for soft rocks considering structure. , 2017, 36(3): 571-578.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2015.1734 或 http://www.rockmech.org/CN/Y2017/V36/I3/571

[5]	何满潮. 深部软岩工程的研究进展与挑战[J]. 煤炭学报，2014，39(8)：1 409-1 417.(HE Manchao. Progress and challenges of soft rock engineering in depth[J]. Journal of China Coal Society，2014，39(8)：1 409-1 417.(in Chinese)) " target="_blank">
[21]	LIU M D，CARTER J P. A structured cam clay model[J]. Canadian Geotechnical Journal，2002，39(6)：1 313-1 332. " target="_blank">
[24]	张锋. 计算土力学[M]. 北京：人民交通出版社，2007：64-74.(ZAHNG Feng. Computational soil mechanics[M]. Beijing：China Communications Press，2007：64-74.(in Chinese)) " target="_blank">
[6]	NOBLE C A. Effect of temperature on strength of soils[Ph. D. Thesie][D]. Iowa，USA：Iowa State University，1968. " target="_blank">
[23]	ASAOKA A，NAKANO M，NODA T，et. al. Delayed compression/ consolidation of naturally clay due to degradation of soil structure[J]. Soils and Foundations，2000，40(3)：75-85. " target="_blank">
[25]	CEKEREVAC C，LALOUI L. Experimental study of thermal effects on the mechanical behaviour of a clay[J]. International Journal for Numerical and Analytical Methods in Geomechanics，2004，28(3)：209-228. " target="_blank">
[1]	左建平，满轲，曹浩，等. 热力耦合作用下岩石流变模型的本构研究[J]. 岩石力学与工程学报，2008，27(1)：2 610-2 616.(ZUO Jianping，MAN Ke，CAO Hao，et al. Study on constitutive equation of rock rheological model with thermo-mechanical coupling effects[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(1)：2 610-2 616.(in Chinese))
[7]	ZHANG S，LENG W，ZHAGN F，et. al. A simple thermo- elastoplastic model for geomaterials[J]. International Journal of Plasticity，2012，34(1)：93-113. " target="_blank">
[9]	王东，康天合，柴肇云，等. 电化学作用对蒙脱石软岩颗粒物沉降与体积膨胀性影响的试验研究[J]. 岩石力学与工程学报，2009，28(9)：1 876-1 883.(WANG Dong，KANG Tianhe，CHAI Zhaoyun，et al. Experimental studies of subsidence and expandability of montmorillonitic soft rock particles under electrochemical treatment[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(9)：1 876-1 883.(in Chinese))
[11]	张计，黄斌，饶锡保，等. 结构性对膨胀岩膨胀特性影响试验研究[J]. 兰州大学学报，2011，47：283-326.(ZHANG Ji，HUANG Bin，RAO Xibao，et al. Experimental research of structural effects on expansion characteristics of expansive rock[J]. Journal of Lanzhou University，2011，47：283-326.(in Chinese)) " target="_blank">
[17]	彭柏兴，王星华. 软岩旁压试验与单轴抗压试验对比研究[J]. 岩土力学，2006，27(3)：451-454.(PENG Baixing，WANG Xinghua. Comparative study on PMT and uniaxial compressive test on soft rock[J]. Rock and Soil Mechanics，2006，27(3)：451-454.(in Chinese))
[19]	GENS A，NOVA R. Conceptual bases for a constitutive model for bonded soils and weak rocks[J]. Geotechnical Engineering of Hard Soils-soft Rocks，1993，1(1)：485-494. " target="_blank">
[3]	OKADA T. Mechanical properties of sedimentary soft rock at high temperatures. part 1. Evaluation of temperature dependency based on triaxial compression test[J]. Denryoku Chuo Kenkyusho Hokoku，2005：1-4. " target="_blank">
[13]	张永双，郭长宝，曲永新，等. 膨胀性硅藻土的力学性质及其灾害效应研究[J]. 岩土力学，2013，34(1)：23-30.(ZHANG Yongshuang，GUO Changbao，QU Yongxin，et. al. Research on mechanical properties of swelling diatomite and their geohazard effects[J]. Rock and Soil Mechanics，2013，34(1)：23-30.(in Chinese))
[15]	娄国充，周德培. 软岩高边坡土钉支护的监测分析与优化设计[J]. 岩石力学与工程学报，2004，16(16)：2 734-2 738.(LOU Guochong，ZHOU Depei. Monitoring and design optimization of soil-nailing support for high weak rock slope[J]. Chinese Journal of Rock Mechanics and Engineering，2004，16(16)：2 734-2 738.(in Chinese))
[16]	彭柏兴，王星华，雷金山. 湘浏盆地红层嵌岩桩荷载传递性状试验研究[J]. 工程地质学报，2009，17(3)：401-407.(PENG Baixing，WANG Xinghua，LEI Jinshan. Static loading study of bearing capability behavior of rock-socket pile in red beds soft rock in Xiang-Liu Basin[J]. Journal of Engineering Geology，2009，17(3)：401-407.(in Chinese))
[2]	FUJINUMA S，OKADA T，HIBINO S，et. al. Consolidated undrained triaxial compression test of sedimentary soft rock at a high temperature[C]// Proceedings of the 32nd Symposium on Rock Mechanics. [S. l.]：[s. n.]，2003：125-130. " target="_blank">
[4]	OKADA T. Mechanical properties of sedimentary soft rock at high temperatures. part 2. Evaluation of temperature dependency of creep behavior based on unconfined compression test[J]. Denryoku Chuo Kenkyusho Hokoku，2006：1-4. " target="_blank">
[8]	辛鹏，吴树仁，石菊松，等. 簸箕山大型老滑坡滑动带的结构特征及形成机制试验研究[J]. 岩石力学与工程学报，2013，32(7)：1 382-1 391.(XIN Peng，WU Shuren，SHI Songju，et. al. Structural characteristics of soft-rock slip zone and experimental study of its formation mechanism in Boji mountain large-scale old landslide[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(7)：1 382-1 391.(in Chinese))
[10]	许兵. 关于岩体结构力学基本观点探讨——试论孙广忠教授的岩体力学道路[J]. 工程地质学报，1997，5(4)：295-298.(XU Bing. A discussion on the basic viewpoints of rockmass structural mechanics-on the SUN Guangzhong?s way to rochmass mechanics[J]. Journal of Engineering Geology，1997，5(4)：295-298.(in Chinese))
[12]	曾锃，沈贵华，王秋杰，等. 利用各向异性软岩筑高混凝土面板堆石坝关键技术研究[J]. 岩石力学与工程学报，2015，33(增l)：2 655-2 661.(ZENG Zeng，SHEN Guihua，WANG Qiujie，et. al. Study of key technologies of using anisotropic soft rock to build high concrete face rockfill dam[J]. Chinese Journal of Rock Mechanics and Engineering，2015，33(Supp.l)：2 655-2 661.(in Chinese))
[14]	张永双，郭长宝，曲永新，等. 云南腾冲膨胀性硅藻土的发现及其工程地质意义[J]. 工程地质学报，2012，20(2)：266-275.(ZHANG Yongshuang，GUO Changbao，QU Yongxin，et. al. Discovery of swelling diatomite at Tengchong，Yunnan Province and its implication in engineering geology[J]. Journal of Engineering Geology，2012，20(2)：266-275.(in Chinese))
[18]	LIU M D，CARTER J P，DESAI C S. Modeling compression behavior of structured geomaterials[J]. International Journal of Geomechanics，2003，3(2)：191-204. " target="_blank">
[20]	LEROUEIL S，VAUGHAN P R. The general and congruent effects of structure in natural soils and weak rocks[J]. Géotechnique，1990，40(3)：467-488. " target="_blank">
[22]	HASHIGUCHI K. Subloading surface model in unconventional plasticity[J]. International Journal of Solids and Structures，1989，25(8)：917-945. " target="_blank">