| 基于水-岩相互作用的泥岩库岸时变稳定性分析 |
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| 引用本文： | 周世良,刘小强,尚明芳,李怡.基于水-岩相互作用的泥岩库岸时变稳定性分析[J].岩土力学,2012,33(7):1933-1939. |
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| 作者姓名： | 周世良 刘小强 尚明芳 李怡 |
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| 作者单位： | 重庆交通大学 河海学院，重庆 400074 |
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| 基金项目： | 教育部科学技术研究重点项目(No.210176);云南省交通运输厅科技项目(No.702237) |
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| 摘 要： | 为探寻云南省富宁港区泥岩库岸在水-岩相互作用下的稳定性演变规律，通过富宁港区一期工程现场采集泥岩试样，经过不同次数的干湿循环后，进行常规三轴压缩试验。将得到的岩石抗剪强度参数进行工程转换，经回归分析后构建泥岩岩体综合抗剪强度参数概率分布的时变模型。结合极限平衡法和可靠性理论，得到水-岩相互作用下泥岩库岸中值安全系数、可靠度及可靠安全系数的时变规律。分析结果表明，在水位反复升降作用下，综合二元指标的可靠安全系数能更合理地分析泥岩库岸稳定性；库岸整体稳定程度呈现出非线性衰变特点；库岸最危险滑动面表现为由内向外的渐进性破坏。以试验为基础，提出的泥岩库岸时变稳定性分析方法为研究水位周期性涨落下库岸的稳定性演变规律提供了一条有效途径。
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| 关 键 词： | 水-岩相互作用 泥岩库岸 抗剪强度参数 时变性 稳定性 可靠性 |
| 收稿时间： | 2011-07-12 |
Time-varying stability analysis of mudstone reservoir bank based on water-rock interaction |
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| ZHOU Shi-liang
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LIU Xiao-qiang
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SHANG Ming-fang
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LI Yi.Time-varying stability analysis of mudstone reservoir bank based on water-rock interaction[J].Rock and Soil Mechanics,2012,33(7):1933-1939. |
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| Authors: | ZHOU Shi-liang LIU Xiao-qiang SHANG Ming-fang LI Yi |
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| Institution: | College of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, China |
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| Abstract: | In order to explore the stability evolution law,under water-rock interaction,of mudstone reservoir bank which has been located in Funing Port areas of Yunnan province,and then based on the rock samples,collected from the first-stage project field,the conventional triaxial compression tests were conducted with different numbers of drying and wetting cycles and the rock shear strength parameters were obtained.After engineering conversion of strength between rock and rock mass,it formulated the time-varying model of probability distribution of mudstone general shear strength parameters by regression analysis.Then combining with the limit equilibrium method and the reliability theory,the time-varying laws of mean safety factor,reliability and reliability safety factor were drawn.The results show that the reliability safety factor,coupling the safety factor and reliability,can analyze the time-variation of mudstone reservoir bank more reasonably,during the water level fluctuation repeatedly.Furthermore,it is nonlinearly that the characteristic of the whole stability of mudstone reservoir bank has changed.Besides,the failure model of the bank slope is gradual that the critical slip surface changes from inside to outside.The time-varying stability analysis methods of mudstone reservoir bank proposed by the paper based on the laboratory experiment can provide an effective approach for stability evolution rule of the reservoir bank,impacted on by the high water soaking and water level periodic fluctuation. |
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| Keywords: | water-rock interaction mudstone reservoir bank shear strength parameters time-varying stability reliability |
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