• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Dam safety 2009 >TRANSIENT SEEPAGE ANALYSES: APPLICATIONS FOR EARTH DAMS
【24h】

TRANSIENT SEEPAGE ANALYSES: APPLICATIONS FOR EARTH DAMS

机译：瞬态渗流分析：土坝的应用

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Steady-state seepage conditions are typically used to analyze and design earth dams and size internal drains. Thernmaximum seepage through the dam occurs under steady-state conditions. Steady-state conditions also represent the criticalrncondition for evaluating the stability of the downstream slope due to the maximum location of the phreatic surface. In certainrncases, a transient seepage analysis, which accounts for changes in the seepage behavior during the passage of time, may bernapplicable. For example, transient seepage analysis may be utilized when steady-state conditions do not develop due tornfluctuating water levels, as might be the case for dams at dry detention basins or levees that experience rapid filling andrndrawdown. An internal drainage system for a dry detention basin or levee designed without considering transient seepagernconditions can result in an overly conservative design by over-sizing the internal drains. Transient seepage modeling, used inrnconjunction with traditional steady-state seepage modeling, can more accurately predict drainage behavior during plannedrnfilling and drawdown cycles, thus effectively meeting dam safety standards while achieving a more economical design.rnAnother potential application for transient seepage analyses is the evaluation of the stability of the upstream slope of an earthrndam under drawdown conditions. Specifically, a transient analysis may be used to determine appropriate operationalrndrawdown rates to reduce the likelihood of sloughing of unprotected upstream soil slopes in earth dams. While not typicallyrna dam safety issue, surficial sloughing may necessitate additional maintenance such as re-grading following drawdownrnevents.
机译：稳态渗流条件通常用于分析和设计土坝并确定内部排水口的尺寸。通过大坝的最大渗流发生在稳态条件下。由于潜水面的最大位置，稳态条件也代表了评估下游斜坡稳定性的关键条件。在某些情况下，可能需要应用瞬态渗流分析来解决一段时间内渗流行为的变化。例如，当由于水位波动而无法形成稳态条件时，可以采用瞬态渗流分析，如干旱滞留盆地或堤坝上的大坝经历快速充水和降水的情况。不考虑瞬态渗流条件而设计的干式滞留池或大堤的内部排水系统，由于内部排水口尺寸过大，可能导致设计过于保守。与传统的稳态渗流模型结合使用的瞬态渗流模型可以更准确地预测计划的填土和缩水循环期间的排水行为，从而在达到更经济的设计的同时有效地满足大坝安全标准。瞬态渗流分析的另一个潜在应用是对水库的评估。降落条件下土坝上游边坡的稳定性。具体而言，可以使用瞬态分析来确定适当的运行水位下降率，以减少土坝中未经保护的上游土壤坡度塌陷的可能性。虽然通常不是大坝安全问题，但表面塌落可能需要进行额外的维护，例如在水位下降事件后重新定级。

著录项

  • 来源
    《Dam safety 2009》|2009年|p.1-8|共8页
  • 会议地点 Hollywood FL(US);Hollywood FL(US)
  • 作者

    Salome Romero; James J. Daly; Kerem Esin; Nagesh Koragappa;

  • 作者单位

    Golder Associates, Inc., Atlanta, Georgia;

    rnGolder Associates, Inc., Atlanta, Georgia;

    rnGolder Associates, Inc., Tampa, Florida;

    rnGolder Associates, Inc., Sunnyvale, California;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 TV698.23;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号