| 磷石膏高坝稳定性分析 |
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| 引用本文： | 张 超,余克井,杨春和,陈剑文.磷石膏高坝稳定性分析[J].岩土力学,2006,27(Z1):113-117. |
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| 作者姓名： | 张 超 余克井 杨春和 陈剑文 |
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| 作者单位： | 1. 中国科学院 岩土力学重点实验室，武汉 430071；2. 宁波华东核工业工程勘察院，宁波 315800 |
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| 基金项目： | 中国科学院武汉岩土力学研究所博士科研启动基金资助项目（No. Q220604）。 |
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| 摘 要： | 对于磷石膏的力学特性，国内外的研究很少。通过室内高压三轴试验，研究了磷石膏的强度与围压的关系。从高压三轴试验结果来看，磷石膏的强度随着围压的升高而降低，且磷石膏的高压折减效应比较明显。在稳定性分析中，如果采用常规围压条件下的三轴试验得到的强度进行分析，其稳定性分析结果是偏于不安全的。以一个高磷石膏坝为例，对其稳定性进行数值模拟分析。结果表明，考虑强度折减以后其安全系数明显降低。得出了磷石膏具有明显的高压强度折减特性，在高磷石膏坝的稳定性分析中一定要考虑高压强度折减的结论。
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| 关 键 词： | 磷石膏 高坝 稳定性分析 强度折减 |
| 收稿时间： | 2005-04-10 |
Stability analysis of high phosphogypsum dam |
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| ZHANG Chao,YU Ke-jing,YANG Chun-he,CHEN Jian-wen.Stability analysis of high phosphogypsum dam[J].Rock and Soil Mechanics,2006,27(Z1):113-117. |
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| Authors: | ZHANG Chao YU Ke-jing YANG Chun-he CHEN Jian-wen |
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| Institution: | 1. Key Laboratory of Rock and Soil Mechanics, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Ningbo East-China Engineering Survey Institute of Nuclear Industry, Ningbo 315800, China |
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| Abstract: | Concerning the rare study on mechanical properties of phosphogypsum, the relationship of strength with confining pressure is investigated by the triaxial compression experiments with high confining pressure. From the experiment results, it is found that the strength will increase with the increasingly confining pressure and the tendency is very obvious. It is dangerous to use the strength parameters obtained from the conventional triaxial compression experiments to analyze the stability of high phosphogypsum dam. Taking a high phosphogypsum dam for example, the stability of the dam is analyzed, And the results indicate that the safety factor would obviously decrease if the strength reduction of phosphogypsum in high confining pressure were taken into account. A conclusion is drawn that the strength reduction of phosphogypsum in high confining pressure is evident, and it is necessary to consider the strength reduction of phosphogypsum when analyzing the stability of high strength reduction of phosphogypsum dam. |
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| Keywords: | phosphogypsum high dam stability analysis strength reduction |
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