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- 2017
三轴应力条件下粉砂质泥岩分级松弛特性
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Abstract:
摘要： 为研究软岩的应力松弛特性,采用分级荷载的方式对粉砂质泥岩进行三轴条件下的松弛试验。通过对不同围压条件下泥质粉砂松弛特性的分析,发现Burgers模型能够很好的反映出泥质粉砂岩不同应力条件下的松弛特性。研究应力松弛度随各级荷载初始应力水平的演化规律,结果表明:发现各级荷载初始应力较低时,应力松弛度随着各级荷载初始应力的升高而指数型降低;各级荷载初始应力较高时,部分岩样的应力松弛度呈现出略微升高的趋势。
Abstract: To investigate the stress relaxation characteristics of soft rock, step loading relaxation tests under tri-axial stress condition were performed with silt mudstone samples. Based on the analysis of silt mudstone relaxation characteristics with different confining stresses, the stress relaxation properties could be well reflected by the Burgers model. The evolution of stress relaxation rate with the change of original stresses was studied. The results showed that, when the original stress was lower, the stress relaxation rate decreased exponentially with the increase of the initial stress; while higher original stress was applied, the stress relaxation of some samples showed a slight increase trend
| [1] | 李铀,朱维申,彭意,等. 某地红砂岩多轴受力状态蠕变松弛特性试验研究[J]. 岩土力学, 2006, 27(8): 1248-1252. LI You, ZHU Weishen, PENG Yi, et al. Multi-axial experimental study on creep and relaxation properties of red sandstone from somewhere [J]. Rock and Soil Mechanics, 2006, 27(8): 1248-1252. |
| [2] | 熊良宵,杨林德,张尧. 绿片岩多轴受压应力松弛试验研究[J].岩土工程学报,2010,32(8):1158-1165. XIONG Liangxiao, YANG Linde, ZHANG Yao. Stress relaxation tests on green schist specimens under multi-axial compression[J].Chinese Journal of Geotechnical Engineering,2010,32(8):1158-1165 |
| [3] | 田洪铭, 陈卫忠, 赵武胜,等. 宜—巴高速公路泥质红砂岩三轴应力松弛特性研究[J]. 岩土力学,2013,34(4):981-986. TIAN Hongming, CHEN Weizhong, ZHAO Wusheng, et al. Analysis of triaxial stress relaxation properties of red silty mudstone of Yichang-Badong highway[J].Rock and Soil Mechanics, 2013, 34(4):981-986. |
| [4] | PARASCHIV-MUNTEANU I, CRISTESCU N D. Stress relaxation during creep of rocks around deep boreholes[J]. International Journal of Engineering Science, 2001, 39(7): 737-754. |
| [5] | 周德培. 流变力学原理在岩土工程中的应用[M]. 成都:西南交通大学出版社, 1995. ZHOU Depei. Application of rheological mechanics principle in geotechnical engineering[M]. Chengdu: Southwest Jiaotong University Press, 1995. |
| [6] | 于怀昌, 李亚丽, 刘汉东. 粉砂质泥岩三轴压缩应力松弛本构模型研究[J]. 煤炭学报, 2011, 36(8): 1258-1263. YU Huaichang, LI Yali, LIU Handong.Study of stress relaxation model of silty mudstone under triaxial compression[J]. Journal of China Coal Society, 2011, 36(8): 1258-1263. |
| [7] | RUTTER E H, MAINPRICE D H. The effect of water on stress relaxation of faulted and unfaultedsandstone[J]. Pure and Applied Geophysics, 1978, 116(4-5):634-654. |
| [8] | TANG L Z, PAN C L. Experiment study on properties of stress relaxation of rock under deformation at peak load[J]. Rock and Soil Mechanics, 2003, 24(6):940-942. |
| [9] | 李永盛. 单轴压缩条件下四种岩石的蠕变和松弛试验研究[J]. 岩石力学与工程学报,1995,14(1):39-47. LI Yongsheng. Creep and relaxation of 4 kinds of rock under uniaxial compression tests[J]. Journal of Rock Mechanics and Engineering, 1995, 14(1):39-47. |
| [10] | 杨春和,殷建华,DAEMEN J J K. 盐岩应力松弛效应的研究[J]. 岩石力学与工程学报,1999,18(3):262-265. YANG Chunhe, YIN Jianhua, DAEMEN J J K. The investigation of stress relaxation of salt rock[J]. Journal of Rock Mechanics and Engineering, 1999, 18(3):262-265. |
| [11] | 曹平,郑欣平,李娜,等. 深部斜长角闪岩流变试验及模型研究[J]. 岩石力学与工程学报,2012,31(增1):3015-3021. CAO Ping, ZHENG Xinping, LI Na, et al. Experiment and model study of rheological characteristics for deep amphibolite[J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(Supp.1):3015-3021. |
| [12] | 郑欣平. 金川二矿区深部岩石蠕变与松弛特性研究[D]. 长沙:中南大学, 2012. ZHENG Xinping. Research on creep and relaxation properties of deeprock masses in Jinchuan no.2 mining district[D]. Changsha: Central South University, 2012. |
| [13] | 邱贤德, 庄乾城. 岩盐流变特性的研究[J]. 重庆大学学报(自然科学版), 1995, 18(4): 96-103. QIU Xiande, ZHANG Qiancheng. Research on the rheology behavior of rock salt[J]. Journal of Chongqing University(Natural Science Edition), 1995, 18(4): 96-103. |
| [14] | 李铀,朱维申,彭意,等. 某地红砂岩多轴受力状态蠕变松弛特性试验研究[J]. 岩土力学, 2006, 27(8):1248-1252. LI You, ZHU Weishen, PENG Yi, et al. Multi-axial experimental study on creep and relaxation properties of red sandstone from somewhere[J]. Rock and Soil Mechanics, 2006, 27(8): 1248-1252. |
| [15] | 唐礼忠,潘长良. 岩石在峰值荷载变形条件下的松弛试验研究[J].岩土力学,2003,24(6):940-942. TANG Lizhong, PAN Changliang. Experiment study on properties of stress relaxation of rock under deformation at peak load[J]. Rock and Soil Mechanics, 2003, 24(6):940-942. |
| [16] | 于怀昌,周敏,刘汉东,等. 粉砂质泥岩三轴压缩应力松弛特性试验研究[J]. 岩石力学与工程学报,2011,30(4):803-811. YU Huaichang, ZHOU Min, LIU Handong, et al. Experimental investigation on stress relaxation properties of silty mudstone under triaxial compression[J]. ChineseJournal of Rock Mechanics and Engineering, 2011, 30(4):803-811. |
