甘肃甘谷裂隙泥岩剪切蠕变行为及其修正模型研究

吴礼舟; 李部; 孙萍

甘肃甘谷裂隙泥岩剪切蠕变行为及其修正模型研究

吴礼舟^1, ,,
李部¹,
孙萍^2,

1.
成都理工大学地质灾害防治与地质环境保护国家重点试验室, 四川成都 610059
2.
中国地质科学院地质力学研究所, 北京 100081

基金项目:

国家自然科学基金面上项目 41472296

国家自然科学基金面上项目 41672282

详细信息

作者简介:
孙萍(1978-), 女, 博士, 副研, 主要从事工程地质、地质灾害方面的研究工作。E-mail:sunpingcgs@163.com

通讯作者:
吴礼舟(1975-), 男, 博士, 教授, 主要从事岩土工程科研教学工作。E-mail:wulizhou07@cdut.cn

中图分类号: T045;P642.22
计量
- 文章访问数: 261
- HTML全文浏览量: 164
- PDF下载量: 15
- 被引次数: 0
出版历程
- 收稿日期: 2017-05-14
- 刊出日期: 2017-12-01

STUDY ON SHEAR CREEP BEHAVIOR OF MUDSTONE AND ITS CORRECTION MODEL OF GANGU FISSURE IN GANSU

WU Lizhou^{1
, ,},
LI Bu¹,
SUN Ping^2
,

1.
State Key Laboratory of Geological Hazard Prevention and Geological Environment Protection, Chengdu University of Technology, Chengdu 610059, Sichuan, China
2.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China

摘要

摘要: 岩石在长期荷载作用下表现出典型的蠕变特性，裂隙泥岩在长期荷载作用下的力学性质不同于完整岩石。对甘肃甘谷赵家窑滑坡钻孔取芯的裂隙泥岩开展剪切蠕变试验，探讨轴向压应力、预制裂隙长度等因素对试样剪切蠕变特征的影响。试验结果表明：轴向荷载和裂隙长度对试样剪切蠕变特征有明显的影响。轴向压应力越大，试样剪切蠕变变形越不明显；裂隙越长，试样剪切蠕变变形越显著。应力较低时，如Cvisc模型等蠕变模型能够较好反映泥岩的蠕变力学特性。而在加速蠕变阶段，大多数模型却不能准确体现泥岩蠕变曲线的非线性变化。改进的西原模型克服了传统模型不能对非线性蠕变特征进行描述的缺点，且模型参数较少，能较好地适用工程软弱岩体。不同载荷作用下泥质软岩试样剪切蠕变过程中，裂隙泥岩剪切破坏带形成表现为渐进与突发相结合。泥岩的剪切蠕变力学模型可解释泥岩滑坡的多种现象，边坡潜在滑移带内泥质软岩发生的剪切蠕变则是泥岩滑坡的内在诱因。
- 裂隙泥岩 /
- 剪切蠕变 /
- 蠕变模型 /
- 滑坡
Abstract: Rock shows typical creep property under long-term load, and the mechanical property of fractured mudstone are different from that of intact rock under long-term load. The shear creep test was carried out on the fractured mudstone from the drilled core at Gangu Zhaojiayao landslide in Gansu province, with investigation on the influence of axial compressive stress and the length of prefabricated cracks on the shear creep characteristics of samples. The experimental results show that axial load and crack length have obvious influence on the shear creep characteristics of the samples. The larger the axial compressive stress is, the less the shear creep deformation is. The longer the crack is, the more obvious the shear creep deformation is. When the stress is low, the creep model such as Cvisc model can better reflect the creep mechanical properties of the mudstone; however, in the accelerated creep stage, most of the models can not accurately reflect the nonlinear change of creep curves of the mudstone. The improved Nishihara (K-B) model with less model parameters overcomes the shortcoming that the traditional model cannot describe the nonlinear creep curves, and it can be better applied to engineering soft rock. In the process of shear creep of argillaceous soft rock samples under different loads, the formation of shear failure zone of fractured mudstone is characterized by the combination of gradual and sudden failure. The shear creep mechanical model of mudstone can explain many phenomena of mudstone landslide. The shear creep of the argillaceous soft rock in the potential slip zone of the slope is the intrinsic cause of the landslide.
- fractured mudstone /
- shear creep /
- creep model /
- landslide

HTML全文

图 1 泥岩试样

Figure 1. Mudstone specimen

下载: 全尺寸图片幻灯片

图 2 裂隙加工示意图

H-岩石试件边长; a-为加工裂纹深度

Figure 2. Sketch map of fracture processing

下载: 全尺寸图片幻灯片

图 3 仪器装样及运行过程图

Figure 3. Instrument sample loading and running process diagram

下载: 全尺寸图片幻灯片

图 4 试样破坏特征

Figure 4. Damage characteristics of samples

下载: 全尺寸图片幻灯片

图 5 不同正应力下无裂隙试样剪切蠕变位移-时间分阶段曲线

Figure 5. Displacement-time curves of shear creep under different normal stresses of non-crack samples

下载: 全尺寸图片幻灯片

图 6 预制10 mm裂隙试样在不同正应力下剪切蠕变位移-时间曲线

Figure 6. Displacement-time curves of shear creep under different normal stresses of prefabricated 10 mm crack samples

下载: 全尺寸图片幻灯片

图 7 预制15 mm裂隙试样在不同正应力下剪切蠕变位移-时间曲线

Figure 7. Displacement-time curves of shear creep under different normal stresses of prefabricated 15 mm crack samples

下载: 全尺寸图片幻灯片

图 8 预制裂隙10 mm在不同正应力作用下剪切蠕变速率—时间曲线

Figure 8. Rate-time curves of shear creep under different normal stresses of prefabricated 10 mm crack samples

下载: 全尺寸图片幻灯片

图 9 预制裂隙15 mm在不同正应力作用下剪切蠕变速率—时间曲线

Figure 9. Rate-time curves of shear creep under different normal stresses of prefabricated 15 mm crack samples

下载: 全尺寸图片幻灯片

图 10 蠕变体的示意图及应变-时间曲线

Figure 10. Schematic diagram and axial strain-time curve of a creep mass

下载: 全尺寸图片幻灯片

图 11 改进的西原模型

Figure 11. The modified Nishihara model

下载: 全尺寸图片幻灯片

图 12 改进西原模型计算值与试验结果值的对比

Figure 12. Comparison between the modified Nishihara model and the experiment

下载: 全尺寸图片幻灯片

表 1 泥质软岩试样

Table 1. Parameters of pelitic soft rock sample

编号	裂隙长度a/mm	水平初始荷载τ/MPa	每级水平荷载增加τ/MPa	轴向荷载N/kN	轴向正应力σ/MPa
W1-3	0	0.56	0.56	1	0.28
W4-6	0	0.56	0.56	2	0.56
W7-9	0	0.56	0.56	3	0.83
L1-3	10	0.56	0.56	1	0.28
L4-6	10	0.56	0.56	2	0.56
L7-9	10	0.56	0.56	3	0.83
L10-12	15	0.56	0.56	1	0.28
L13-15	15	0.56	0.56	2	0.56
L16-18	15	0.56	0.56	3	0.83

下载: 导出CSV

参考文献(25)

[1]	孙钧.岩土材料流变及其工程应用[M].北京:中国建筑工业出版社, 1999. SUN Jun. Rheology of Geotechnical Materials and their Engineering Applications[M]. Beijing:China Building Industry Press, 1999. (in Chinese)
[2]	杨圣奇. 岩石流变力学特性研究及其工程应用[D]. 南京: 河海大学, 2006.
[3]	杨圣奇, 徐卫亚, 杨松林.龙滩水电站泥板岩剪切流变力学特性研究[J].岩土力学, 2007, 28(5):895-902. http://d.wanfangdata.com.cn/Periodical/ytlx200705009 YANG Shengqi, XU Weiya, YANG Songlin. Investigation on shear rheological mechanical properties of shale in Longtan Hydropower Project[J]. Rock and Soil Mechanics, 2007, 28(5):895-902. (in Chinese with English abstract) http://d.wanfangdata.com.cn/Periodical/ytlx200705009
[4]	高春艳, 高全臣, 江斌, 等.朱集煤矿泥岩的流变试验与本构模型研究[J].长江科学院院报, 2015, 32(5):76-81. http://www.cqvip.com/QK/94076X/201505/664640488.html GAO Chunyan, GAO Quanchen, JIANG Bin, et al. Rheological test and constitutive model of mudstone of Zhuji coal mine[J]. Journal of Yangtze River Scientific Research Institute, 2015, 32(5):76-81. (in Chinese with English abstract) http://www.cqvip.com/QK/94076X/201505/664640488.html
[5]	王志检, 殷坤龙, 简文星.万州区红层软弱夹层蠕变试验研究[J].岩土力学, 2007, 28(S1):40-44. http://www.cqvip.com/QK/94551X/2007S1/3000300800.html WANG Zhijian, YIN Kunlong, JIAN Wenxing. Experimental research on creep of incompetent beds in jurassic red clastic rocks in Wanzhou[J]. Rock and Soil Mechanics, 2007, 28(S1):40-44. (in Chinese with English abstract) http://www.cqvip.com/QK/94551X/2007S1/3000300800.html
[6]	丁秀丽, 付敬, 刘建, 等.软硬互层边坡岩体的蠕变特性研究及稳定性分析[J].岩石力学与工程学报, 2005, 24(19):3410-3418. doi: 10.3321/j.issn:1000-6915.2005.19.002 DING Xiuli, FU Jing, LIU Jian, et al. Study on creep behavior of alternatively distributed soft and hard rock layers and slope stability analysis[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(19):3410-3418. (in Chinese with English abstract) doi: 10.3321/j.issn:1000-6915.2005.19.002
[7]	吴立新, 王金庄, 孟顺利.煤岩流变模型与地表二次沉陷研究[J].地质力学学报, 1997, 3(3):29-35. http://journal.geomech.ac.cn/ch/reader/view_abstract.aspx?file_no=19970331&flag=1 WU Lixin, WANG Jinzhuang, MENG Shunli. Coal creep and ground subsidence of Fengfeng coal mine[J]. Journal of Geomechanics, 1997, 3(3):29-35. (in Chinese with English abstract) http://journal.geomech.ac.cn/ch/reader/view_abstract.aspx?file_no=19970331&flag=1
[8]	Li Y S, Xia C C. Time-dependent tests on intact rocks in uniaxial compression[J]. International Journal of Rock Mechanics and Mining Sciences, 2000, 37(3):467-475. doi: 10.1016/S1365-1609(99)00073-8
[9]	Xu T, Xu Q, Tang C A, et al. The evolution of rock failure with discontinuities due to shear creep[J]. Acta Geotechnica, 2013, 8(6):567-581. doi: 10.1007/s11440-013-0244-5
[10]	Zhang Q Z, Shen M R, Jang B A, et al. Creep behavior of rocks with rough surfaces[J]. Journal of Materials in Civil Engineering, 2016, 28(9):04016063. doi: 10.1061/(ASCE)MT.1943-5533.0001557
[11]	曾德智, 林元华, 卢亚锋, 等.复合岩盐层井眼蠕变缩径的数值模拟[J].地质力学学报, 2012, 18(2):158-164. http://journal.geomech.ac.cn/ch/reader/view_abstract.aspx?file_no=20120206&flag=1 ZENG Dezhi, LIN Yuanhua, LU Yafeng, et al. Numerical simulation of hole creep shrinkage for composite rock salt layers[J]. Journal of Geomechanics, 2012, 18(2):158-164. (in Chinese with English abstract) http://journal.geomech.ac.cn/ch/reader/view_abstract.aspx?file_no=20120206&flag=1
[12]	范广勤.岩土工程流变力学[M].北京:煤炭工业出版社, 1993. FAN Guangqin. Rheology of Geotechnical Engineering[M]. Beijing:Coal Industry Press, 1993. (in Chinese)
[13]	孙钧.岩石流变力学及其工程应用研究的若干进展[J].岩石力学与工程学报, 2007, 26(6):1081-1106. http://www.cqvip.com/Main/Detail.aspx?id=25634268 SUN Jun. Rock rheological mechanics and its advance in engineering applications[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(6):1081-1106. (in Chinese with English abstract) http://www.cqvip.com/Main/Detail.aspx?id=25634268
[14]	夏才初, 金磊, 郭锐.参数非线性理论流变力学模型研究进展及存在的问题[J].岩石力学与工程学报, 2011, 30(3):454-463. http://www.cqvip.com/QK/96026X/201103/39144951.html XIA Caichu, JIN Lei, GUO Rui. Nonlinear theoretical rheological model for rock:a review and some problems[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(3):454-463. (in Chinese with English abstract) http://www.cqvip.com/QK/96026X/201103/39144951.html
[15]	Maranini E, Brignoli M. Creep behaviour of a weak rock:experimental characterization[J]. International Journal of Rock Mechanics and Mining Sciences, 1999, 36(1), 127-138. doi: 10.1016/S0148-9062(98)00171-5
[16]	冒海军, 杨春和, 刘江, 等.板岩蠕变特性试验研究与模拟分析[J].岩石力学与工程学报, 2006, 25(6):1204-1209. http://d.wanfangdata.com.cn/Periodical/yslxygcxb200606018 MAO Haijun, YANG Chunhe, LIU Jiang, et al. Testing study and modeling analysis of creep behavior of slates[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(6):1204-1209. (in Chinese with English abstract) http://d.wanfangdata.com.cn/Periodical/yslxygcxb200606018
[17]	袁海平, 曹平, 许万忠, 等.岩石黏弹塑性本构关系及改进的Burgers蠕变模型[J].岩土工程学报, 2006, 28(6):796-799. http://d.wanfangdata.com.cn/Periodical/ytgcxb200606024 YUAN Haiping, CAO Ping, XU Wanzhong, et al. Visco-elastop-lastic constitutive relationship of rock and modified Burgers creep model[J]. Chinese Journal of Geotechnical Engineering, 2006, 28(6):796-799. (in Chinese with English abstract) http://d.wanfangdata.com.cn/Periodical/ytgcxb200606024
[18]	范庆忠, 高延法.软岩蠕变特性及非线性模型研究[J].岩石力学与工程学报, 2007, 26(2):391-396. doi: 10.3321/j.issn:1000-6915.2007.02.022 FAN Qingzhong, GAO Yanfa. Study on creep properties and nonlinear creep model of soft rock[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(2):391-396. (in Chinese with English abstract) doi: 10.3321/j.issn:1000-6915.2007.02.022
[19]	王来贵, 赵娜, 何峰, 等.岩石蠕变损伤模型及其稳定性分析[J].煤炭学报, 2009, 34(1):64-68. http://www.cqvip.com/Main/Detail.aspx?id=29354049 WANG Laigui, ZHAO Na, HE Feng, et al. Rock creep damage model and its stability analysis[J]. Journal of China Coal Society, 2009, 34(1):64-68. (in Chinese with English abstract) http://www.cqvip.com/Main/Detail.aspx?id=29354049
[20]	Yang S Q, Cheng L. Non-stationary and nonlinear visco-elastic shear creep model for shale[J]. International Journal of Rock Mechanics and Mining Sciences, 2011, 48(6):1011-1020. doi: 10.1016/j.ijrmms.2011.06.007
[21]	Yang W D, Zhang Q Y, Li S C, et al. Time-dependent behavior of diabase and a nonlinear creep model[J]. Rock Mechanics and Rock Engineering, 2014, 47(4):1211-1224. doi: 10.1007/s00603-013-0478-4
[22]	徐卫亚, 杨圣奇, 褚卫江.岩石非线性黏弹塑性流变模型(河海模型)及其应用[J].岩石力学与工程学报, 2006, 25(3):433-447. http://d.wanfangdata.com.cn/Periodical_yslxygcxb200603001.aspx XU Weiya, YANG Shengqi, CHU Weijiang. Nonlinear viscoelasto-plastic rheological model (Hohai model) of rock and its engineering application[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(3):433-447. (in Chinese with English abstract) http://d.wanfangdata.com.cn/Periodical_yslxygcxb200603001.aspx
[23]	李英杰, 潘一山, 章梦涛.高地应力围岩分区碎裂化的时间效应分析和相关参数研究[J].地质力学学报, 2006, 12(2):252-260. http://journal.geomech.ac.cn/ch/reader/view_abstract.aspx?file_no=20060236&flag=1 LI Yingjie, PAN Yishan, ZHANG Mengtao. Time effect analysis of zonal disintegration of high in-situ stress surrounding rocks and study of relevant parameters based on the creep instability theory[J]. Journal of Geomechanics, 2006, 12(2):252-260. (in Chinese with English abstract) http://journal.geomech.ac.cn/ch/reader/view_abstract.aspx?file_no=20060236&flag=1
[24]	曹树刚, 边金, 李鹏.岩石蠕变本构关系及改进的西原正夫模型[J].岩石力学与工程学报, 2002, 21(5):632-634. http://d.g.wanfangdata.com.cn/Periodical_yslxygcxb200205004.aspx CAO Shugang, BIAN Jin, LI Peng. Rheologic constitutive relationship of rocks and a modifical model[J]. Chinese Journal of Rock Mechanics and Engineering, 2002, 21(5):632-634. (in Chinese with English abstract) http://d.g.wanfangdata.com.cn/Periodical_yslxygcxb200205004.aspx
[25]	陈沅江, 潘长良, 曹平, 等.软岩流变的一种新力学模型[J].岩土力学, 2003, 24(2):209-214. http://industry.wanfangdata.com.cn/dl/Detail/Periodical?id=... CHEN Yuanjiang, PAN Changliang, CAO Ping, et al. A new mechanical model for soft rock rheology[J]. Rock and Soil Mechanics, 2003, 24(2):209-214. (in Chinese with English abstract) http://industry.wanfangdata.com.cn/dl/Detail/Periodical?id=...