| 潘建平,孔宪京,邹德高.尾矿坝地震液化稳定的简化分析[J].水利学报,2006,37(10):1224-1229 |
| 尾矿坝地震液化稳定的简化分析 |
| Simplified analysis of liquefaction and stability of tailing dam during earthquake |
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| DOI： |
| 中文关键词: 尾矿坝 液化 稳定分析 地震 干滩 |
| 英文关键词: tailing dam liquefaction stability analysis earthquake dry beach |
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| 中文摘要: |
| 简要介绍尾矿坝抗震设计规范中液化分析方法的简化过程，依据抗液化度与孔压比的关系，提出了尾矿坝超静孔压的简化计算式，并应用于拟静力法稳定分析中。结合某尾矿坝实例，用简化方法计算滩长为130m时初期坝淤堵，以及滩长分别为70、130、和200m时初期坝正常排水共计四种工况的液化与稳定。通过计算分析得出，上游坡面水边线附近区域最易液化，其次在初期坝附近。滩长对尾矿坝地震液化稳定有很大影响，滩长越长，液化区越小，稳定性越高。如果初期坝排水设施失效，将导致初期坝附近孔压增大，坝体安全系数降低。因此，保证合理的滩长、初期坝排水设施的有效性对尾矿坝地震稳定非常重要。 |
| 英文摘要: |
| The simplification process of liquefaction analysis in the design code was introduced briefly. According to the relation between liquefaction resistance factor and pore pressure ratio, the formula of excess pore pressure was proposed and applied in pseudo static method slope stability analysis. By using the simplified method, the analysis of liquefaction and stability about upstream method tailing dam under different conditions was made. They include a starter dike of poor drainage with a dry beach 130m long and a starter dike of effective drainage with a dry beach 70m, 130m and 200m long respectively. The calculation results show that the primarily liquefied area is near water line and the secondary is starter dike. The length of dry beach highly affects the stability of tailing dam. The longer the dry beach, the smaller the liquefied area and the
better the stability. If the drainage performance of starter dike is perfectly ineffective, water pore pressure will go up and stability will be poor, so it is very important that appropriate length of dry beach and good drainage of starter dike of tailing dam should be guaranteed. |
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