Embankment Failures and Slope Protection of Earth Dams during Flooding
洪水期间土坝的路堤溃决与护坡
基本信息
- 批准号:08650584
- 负责人:
- 金额:$ 0.83万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:1996
- 资助国家:日本
- 起止时间:1996 至 1997
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Centrifuge model tests were carried out in order to investigate the mechanism of seepage failures of earth dams caused by a rapid increase of reservoir water during flooding, to know which factor should be the main trigger of fracture and when and how it works in the process of overall failure of the embankment. Feasibility of realizing seepage failures in laboratory model tests is another important subject to be discussed for future studies on hydraulic fracturing in earth and rockfill dams. Tests were conducted on several model earth dams made under different compaction conditions to examine their influence on the development of pore-water pressure in the fill.Two distinct patterns were noticed in embankment failures caused by a rapid increase of reservoir water during flooding. One is in case of dry and poorly compacted fill where internal erosion (piping) due to seepage water flow through the dam body is predominant, though over-flow water initially causes a little damage to the downstream surface by gully erosion and contributes to a trigger of piping. The other is in case of fill in wet and/or highly compacted state before flooding, in which surface gully erosion due to over-flow of water extends in a constant rate to the upstream side with a little internal erosion. Measurement of pore-water pressure and FEM analysis on the model tests somewhat revealed the mechanism of these embankment failures, though further studies are required to give more precise and quantitative discussions. Concerning the slope protection work against flooding, a few model tests were carried out to investigate by what material and where and how it should be constructed to get more effective protection. Much discussion is still needed on this subject to apply it for actual design and construction of embankments.
通过室内模型试验,研究了库水位急剧上升引起土坝渗透破坏的机理,以及在土坝整体破坏过程中,哪些因素是诱发土坝破裂的主要因素,以及破裂的时间和方式。在室内模型试验中实现渗透破坏的可行性是今后土石坝水力劈裂研究的另一个重要课题。通过对几个不同压实条件下的土坝模型进行试验,研究了压实条件对填土中孔隙水压力发展的影响。一种情况是干燥且压实度差的填土,其中由于渗透水流通过坝体而导致的内部侵蚀(管涌)占主导地位,尽管溢流水最初通过沟蚀对下游表面造成轻微损害,并有助于引发管涌。另一种情况是在洪水前处于潮湿和/或高度压实状态的填料,其中由于水的溢流而导致的表面沟蚀以恒定速率向上游侧延伸,内部侵蚀较小。模型试验的孔隙水压力测量和有限元分析在一定程度上揭示了这些路堤的破坏机理,但需要进一步的研究,以提供更精确和定量的讨论。针对防洪边坡防护工程,进行了几个模型试验,以探讨用什么材料、在什么地方以及如何建造才能获得更有效的防护。为了将其应用于实际工程的设计和施工中,还需要进行大量的讨论。
项目成果
期刊论文数量(12)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
T.Okumura: "Failures of earth dam due to flooding" International Conference Centrifuge 98 (IS-Tokyo98). (1998)
T.Okumura:“由于洪水导致土坝失效”国际会议离心机 98 (IS-Tokyo98)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
重野 輝貴: "越流破壊に伴う堤体の破壊現象に関する研究" 愛知工業大学研究報告. No.33B. (1998)
Terutaka Shigeno:“溢流破坏引起的堤体破坏现象的研究”爱知工业大学研究报告第33B号。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
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重野 輝貴: "盛土堤体の越流破壊に関する遠心模型実験(その2)" 土木学会中部支部研究発表会講演集. 491-492 (1998)
Terutaka Shigeno:“堤防堤体溢流破坏的离心模型实验(第2部分)”日本土木工程学会中部分会研究发表会议论文集491-492(1998)。
- DOI:
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- 影响因子:0
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SHIGENO Terutaka: "Centrifuge Model Tests on Embankment Failure due to Flooding (in Japanese)" 32th Annual Meeting of JGS. 1977-1978 (1997)
SHIGENO Terutaka:“因洪水导致的路堤破坏的离心机模型试验(日语)”第 32 届 JGS 年会。
- DOI:
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- 期刊:
- 影响因子:0
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SHIGENO Terutaka: "Centrifuge Model Tests on Embankment Failure due to Flooding (No.2) (in Japanese)" Heisei 9th Annual Meeting of JSCE Chubu. 491-492 (1998)
SHIGENO Terutaka:“因洪水导致的路堤破坏的离心机模型试验(第 2 期)(日语)” JSCE 中部平成第九届年会。
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- 影响因子:0
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{{ truncateString('NARITA Kunitomo', 18)}}的其他基金
Behavior of pore water pressure and stability evaluation against seepage failure in earth slopes
土质边坡孔隙水压力特性及渗流破坏稳定性评价
- 批准号:
15560432 - 财政年份:2003
- 资助金额:
$ 0.83万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Behavior of seepage pore-water pressure and its influence on slope stability in embankment by rainfall
降雨渗流孔隙水压力行为及其对路堤边坡稳定性的影响
- 批准号:
13650552 - 财政年份:2001
- 资助金额:
$ 0.83万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Seepage flow behavior in slopes due to water level change in the reservoir
水库水位变化引起的边坡渗流行为
- 批准号:
10650493 - 财政年份:1998
- 资助金额:
$ 0.83万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Study on Three-dimensional Characteristics of Fill Failures for Safety Evaluation
充填破坏三维特征安全评价研究
- 批准号:
06650551 - 财政年份:1994
- 资助金额:
$ 0.83万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
Study on Three-dimensional Bearing Capacity on Level and Slope Grounds
平坡地基三维承载力研究
- 批准号:
04650445 - 财政年份:1992
- 资助金额:
$ 0.83万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
相似海外基金
Failure Behavior of Soil Structures by Centrifuge Model Test
土结构破坏行为的离心模型试验
- 批准号:
63420049 - 财政年份:1988
- 资助金额:
$ 0.83万 - 项目类别:
Grant-in-Aid for General Scientific Research (A)