长江科学院院报 ›› 2014, Vol. 31 ›› Issue (11): 17-21.DOI: 10.3969/j.issn.1001-5485.2014.11.0042014,31(11):17-21

• 岩石力学特性与试验 • 上一篇    下一篇

高拱坝浇筑后河床坝基综合变形模量取值研究

李攀峰a,b,崔长武a,b,陈奎a,b,张绍成a,b   

  1. 中国电建集团 a.成都勘测设计研究院有限公司;
    b.国家能源水电工程技术研发中心, 成都 610072
  • 收稿日期:2014-04-25 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:李攀峰(1976-),男,山西黎城人,教授级高级工程师,博士,主要从事水利水电工程地质方面的研究工作,电话(13880076019)(电子信箱)lpanfeng@chidi.com.cn。

Determining the Comprehensive Deformation Modulus of Foundation after High Dam Constructed

LI Pan-feng1,2, CUI Chang-wu1,2, CHEN Kui1,2, ZhANG Shao-cheng1,2   

  1. 1. Power China Chengdu Engineering Corporation Limited, Chengdu 610072, China;
    2. National Hydropower Technology Research &
    Development Center, Chengdu 610072, China
  • Received:2014-04-25 Revised:2014-11-05 Online:2014-11-01 Published:2014-11-05

摘要: 在高拱坝整个施工周期中,坝基岩体经历了开挖、卸荷、固结灌浆、大坝浇筑、加载等过程,其工程特性也必然发生相应变化。高拱坝浇筑完成后,坝基岩体综合变形模量是大坝安全评价、反馈分析等相关研究的重要参数,但该参数往往无法通过现场试验获得。针对这一问题,以溪洛渡水电站高拱坝为例,在坝基岩体地质条件、变形试验资料、钻孔弹模以及坝基岩体变形模量E0和纵波波速Vp相关关系综合研究的基础上,提出了适用于高拱坝施工完成后坝基综合变形模量取值的思路与方法。采用该方法研究得出溪洛渡高拱坝施工完成后河床坝基综合变形模量为11~14MPa。基于该参数进行三维数值模拟得到坝基岩体的变形值与监测成果基本一致,说明这种取值思路与方法是合适的。

关键词: 高拱坝, 大坝浇筑, 坝基综合变形模量, 变形模量取值, 溪洛渡水电站

Abstract: The engineering properties of high arch dam’s foundation rock change inevitably after excavation unloading, consolidation grouting and dam loading. The comprehensive deformation modulus of foundation rock mass is an important index for safety assessment and feedback analysis, but it cannot be obtained by field test. To solve this problem, we conducted researches on the geological condition, deformation test, borehole elastic modulus, and the relation between deformation modulus E0 and longitudinal wave velocity Vp with Xiluodu hydropower station as an example. On this basis, we put forward a method of determining the comprehensive deformation modulus of foundation rock mass after the completion of high arch dam construction. The comprehensive deformation modulus of Xiluodu high arch dam foundation after construction completed is between 11-14 MPa. This parameter was used for 3-D numerical simulation, and the simulated deformation was in consistency with monitored deformation, which verified this method is appropriate.

Key words: high arch dam, dam foundation, comprehensive deformation modulus, determination of deformation modulus, Xiluodu hydropower station

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