长江科学院院报 ›› 2014, Vol. 31 ›› Issue (11): 66-70.DOI: 10.3969/j.issn.1001-5485.2014.11.0142014,31(11):66-70,88

• 坝基与边坡分析 • 上一篇    下一篇

红层坝基重力坝深层滑动模式及抗力角论证

付敬1,黄书岭1,吴勇进1,职承杰2   

  1. 1.长江科学院 水利部岩土力学与工程重点实验室,武汉 430010;
    2长江勘测规划设计研究有限责任公司 ,武汉 430010
  • 收稿日期:2014-07-22 修回日期:2014-11-05 出版日期:2014-11-01 发布日期:2014-11-05
  • 作者简介:付敬(1971-),女,湖北通城人,高级工程师,硕士研究生,主要从事岩土工程研究,(电话)027-82829886(电子信箱)ywx20603@163.com。
  • 基金资助:
    国家自然科学基金项目(51179013,51379022,51209021); 973项目(2011CB710604)

Argument of Deep Sliding Mode and Resistance Angle of Gravity Dam Foundation in Red Bed Region

FU Jing1, HUANG Shu-ling1, WU Yong-jin1, ZHI Cheng-jie2   

  1. 1. Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Yangtze River Scientific Research Institute, Wuhan 430010, China;
    2.Changjiang Institute of Survey, Planning, Design and Research, Wuhan 430010 , China
  • Received:2014-07-22 Revised:2014-11-05 Online:2014-11-01 Published:2014-11-05

摘要: 亭子口大坝是修建在典型红层地区的混凝土重力高坝,岩层地质特点是地层倾角平缓,软弱夹层较多,这对大坝的深层抗滑稳定十分不利。在现阶段,等K法仍是重力坝深层抗滑稳定的主要分析方法,但在实际操作中,抗力角的不同取值对安全系数结果影响很大。重点分析了亭子口重力坝坝基深层抗滑稳定安全性,采用有限差分强度折减方法和刚体极限平衡等安全系数法对比研究了坝基深层滑面的差异和变化规律,探讨了刚体极限平衡方法中抗力角的合理取值,可为重力坝坝基抗滑稳定设计提供参考依据。

关键词: 红层地区, 重力坝坝基, 抗滑安全系数, 刚体极限平衡法, 有限差分

Abstract: Tingzikou dam is a concrete gravity dam built in typical red rockbed region. The rock geological characteristics are of gentle dipped strata containing several weak interlayers, unfavourable to the deep anti-slide stability of the dam. At present, equal K value method is still the main method of analysing the deep stability against sliding of gravity dam. In practice, the variation of resistance angle greatly influences the result of the safety factor. The focus of this paper is to analyze Tingzikou gravity dam’s stability safety against deep sliding. The difference of the deep sliding surfaces and their variation law using finite difference based strength reduction method and rigid body limit equilibrium based equal safety coefficient method. The reasonable value of resistance angle in the rigid body limit equilibrium method is discussed. This research provides sound basis for the design of gravity dam’s foundation stability against sliding.

Key words: red bed region, gravity dam foundation, factor of safety against sliding, rigid limit equilibrium method, finite difference

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