|
|
|
| RESEARCH ON NONLINEAR CREEP MODEL IDENTIFICATION OF SILTITE IN THREE GORGES RESERVOIR AREA |
| HUANG Ming1，2，LIU Xinrong2 |
(1. College of Civil Engineering，Fuzhou University，Fuzhou，Fujian 350108，China；2. College of Civil Engineering，
Chongqing University，Chongqing 400045，China) |
|
|
|
|
Abstract For study on the nonlinear creep model of T2b2 siltite in the Three Gorges reservoir area，a nonlinear viscoelasticity model that can well describe the creep property of siltite is established and the parameters are also obtained. Based on nonlinear rheological theory and stress-strain relation of T2b2 siltite，a modified Kelvin model and its creep equation are presented firstly. Through installing the swath model which can be expressed as a step function with N model in parallel，a revised N model is established. What?s more，through connecting revised N model with revised K model and H model in the form of series，an mBurgers model，which can well describe the nonlinear creep property of rock is established. According to nonlinear least squares theory and uniaxial creep test results of T2b2 siltite，the parameters of mBurgers model are obtained by inversion calculation. By substituting the parameters obtained on behalf of the inversion into the model and calculating the theoretical results，theoretical curve and test curve are well anastomotic，which indicates that mBurgers model can well describe the creep of T2b2 siltite.
|
|
Received: 29 September 2010
|
|
|
|
| [1] SUN J，WANG S J. Rock mechanizes and rock engineering in China：developments and current state-of-the-art[J]. International Journal of Rock Mechanics and Mining Sciences，2000，37(3)：447–465.
[2] 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)：466–475.
[3] DRAGAN G，FRANCOISE H，DASHNOR H. A short-and long-term rheological model to understand the collapses of iron mines in Lorraine，France[J]. Computers and Geotechnics，2003，30(7)：557–570.
[4] BOIDY E，BOUVAND A，PELLET F. Back analysis of time- dependent behavior of a test gallery in elaystone[J]. Tunnelling and Underground Space Technology，2002，17(4)：415–424.
[5] MALAN D F. Time-dependent behavior of deep level tabu1ar excavations in hard rock[J]. Rock Mechanics and Rock Engineering，1999，32(2)：123–155.
[6] 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.(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))
[7] 王贵君. 盐岩层中天然气存储洞室围岩长期变形特征[J]. 岩土工程学报，2003，25(4)：431–435.(WANG Guijun. Long-term deformation characters of salt rock surrounding a gas storage cavern[J]. Chinese Jounal of Geotechnical Engineering，2003，25(4)：431–435.(in Chinese))
[8] 许宏发，钱七虎，吴华杰，等. 确定软土流变模型参数的回归反演法[J]. 岩土工程学报，2003，25(3)：365–367.(XU Hongfa，QIAN Qihu，WU Huajie，et al. A polynomial regressive inverse method to determine rheologic parameters of soft soil[J]. Chinese Jounal of Geotechnical Engineering，2003，25(3)：365–367.(in Chinese))
[9] 陈宗基，周思孟. 根据流变学与地球动力学观点研究新奥法[J]. 岩石力学与工程学报，1988，7(2)：97–106.(CHEN Zongji，ZHOU Simeng. The NATM studied from the viewpoint of rheology and geodynamics[J]. Chinese Journal of Rock Mechanics and Engineering，1988，7(2)：97–106.(in Chinese))
[10] 李 鹏，刘 建，朱杰兵，等. 软弱结构面剪切蠕变特性与含水量关系研究[J]. 岩土力学，2008，29(7)：1 865–1 871.(LI Peng，LIU Jian，ZHU Jiebing，et al. Research on effects of water content on shear creep behavior of weak structural plane of sandstone[J]. Rock and Soil Mechanics，2008，29(7)：1 865–1 871.(in Chinese))
[11] 赵延林，曹 平，文有道，等. 岩石弹黏塑性流变试验和非线性流变模型研究[J]. 岩石力学与工程学报，2008，27(3)：477–486.(ZHAO Yanlin，CAO Ping，WEN Youdao，et al. Elastovisco- plastic rheological experiment and nonlinear rheological model of rocks[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(3)：477–486.(in Chinese))
[12] 陈晓斌，张家生，封志鹏. 红砂岩粗粒土流变工程特性试验研究[J]. 岩石力学与工程学报，2007，26(3)：601–607.(CHEN Xiaobin，ZHANG Jiasheng，FENG Zhipeng. Experimental study on rheological engineering properties of coarsely granular red sandstone soil[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(3)：601–607.(in Chinese))
[13] 蒋昱州，张明鸣，李良权. 岩石非线性黏弹塑性蠕变模型研究及其参数识别[J]. 岩石力学与工程学报，2008，27(4)：832–839.(JIANG Yuzhou，ZHANG Mingming，LI Liangquan. Study on nonlinear viscoelasto-plastic creep model of rock and its parameter identification[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(4)：832–839.(in Chinese))
[14] WAWERISK W R. Time-dependent rock behavior in uniaxia compression[C]// Proceedings of the 14th，Symp. Rockmeck. [S.l.]：[s.n.]，1972：11–14.
[15] 范庆忠. 岩石蠕变及其扰动效应试验研究[博士学位论文][D]. 青岛：山东科技大学，2006.(FAN Qingzhong. Experimental study on creep and its disturbed effect of rocks[Ph. D. Thesis][D]. Qingdao：Shandong University of Science and Technology，2006.(in Chinese))
[16] 殷跃平，胡瑞林. 三峡库区巴东组(T2b)紫红色泥岩工程地质特征研究[J]. 工程地质学报，2004，12(2)：124–135.(YIN Yueping，HU Ruilin. Engineering geological characteristics of purplish-red mudstone of middle tertiary formation at the three gorges reservoir[J]. Journal of Engineering Geology，2004，12(2)：124–135.(in Chinese))
[17] 刘新荣，黄 明，祝云华，等. 土石混合体填筑路堤中的非线性蠕变模型探析[J]. 岩土力学，2010，31(8)：2 453–2 458.(LIU Xinrong，HUANG Ming，ZHU Yunhua，et al. Study of nonlinear creep model of earth-rock aggregate embankment[J]. Rock and Soil Mechanics，2010，31(8)：2 453–2 458.(in Chinese))
[18] 罗润林，阮怀宁，孙运强，等. 一种非定常参数的岩石蠕变本构模型[J]. 桂林工学院学报，2007，27(2)：200–203.(LUO Runlin，RUAN Huaining，SUN Yunqiang，et al. Non-stationary parameter creep constitutive model of rocks[J]. Journal of Guilin University of Technology，2007，27(2)：200–203.(in Chinese))
[19] 韦立德. 岩石力学损伤和流变本构模型研究[博士学位论文][D]. 南京：河海大学，2003.(WEI Lide. Rock mechanics damage and rheology constitutive models study[Ph. D. Thesis][D]. Nanjing：Hohai University，2003.(in Chinese)) |
|
|
|
2011, Vol. 30 
