长江科学院院报 ›› 2014, Vol. 31 ›› Issue (1): 38-41.DOI: 10.3969/j.issn.1001-5485.2014.01.0082014,31(01):38-41

• 水力学 • 上一篇    下一篇

陡坡隧洞不同进口形式的水力特性分析

李蘅1,李学海2,杜泽金1   

  1. 1.长江勘测规划设计研究有限责任公司,武汉430010;
    2.长江科学院水力学研究所,武汉430010
  • 收稿日期:2013-03-05 修回日期:2014-01-06 出版日期:2014-01-01 发布日期:2014-01-06
  • 通讯作者: 李学海(1966-),男,湖南宁乡人,教授级高级工程师,博士,主要从事水力学及流体力学的研究,(电话)027-82829903(电子信箱)65689@sina.com。
  • 作者简介:李蘅(1978-),男,江苏南京人,高级工程师,硕士,主要从事施工导截流设计的研究,(电话)027-82829274(电子信箱)liheng@cjwsjy.com.cn。
  • 基金资助:
    国家自然科学基金面上资助项目(51279014)

Hydraulic Characteristics of Different Inlet Types of Steep Slope Tunnel

LI Heng1,LI Xue-hai2,DU Ze-jin1   

  1. 1.Changjiang Institute of Survey,Planning,Design and Research,Wuhan 430010,China;
    2.Hydraulics Department,Yangtze River Scientific Research Institute,Wuhan 430010,China
  • Received:2013-03-05 Revised:2014-01-06 Online:2014-01-01 Published:2014-01-06

摘要: 为研究陡坡隧洞的泄流能力和洞内水流流态等水力特性与隧洞进口形式的关系,以某水电工程支流导流陡坡长隧洞为例,运用水力计算分析和模型试验验证的方法,分析比较了锐缘进口和曲线进口形式对陡坡隧洞泄流能力和流态的影响。研究表明:采用曲线进口形式可以提高泄流能力,降低围堰高程,但设计工况下洞内流态处于明满交替流状态,不利隧洞结构安全;采用锐缘进口形式,泄流能力有所降低,但可避免洞内出现明满交替流状态。综合比较认为,在围堰规模较小时,设计陡坡隧洞采用锐缘进口更为合理。

关键词: 陡坡隧洞, 进口形式, 水力计算, 试验验证

Abstract: The effect of sharp-edge inlet and curved inlet on the discharge capacity and flow regime of steep tunnel is researched by using hydraulic calculation analysis and model test verification. The long steep diversion tunnel of a hydropower project is taken as the research object. Research shows that curved inlet could increase the discharge capacity and reduce the cofferdam height,but brings about free-surface-pressure flow in the tunnel,which is harmful to the safety of tunnel structure; whereas sharp-edge inlet reduces the discharge capacity,but avoids free-surface-pressure flow. Therefore,when the cofferdam scale of hydropower project is small,the sharp-edge inlet is recommended.

Key words: steep slope tunnel, inlet type, hydraulic calculation, model test verification

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