长江科学院院报 ›› 2013, Vol. 30 ›› Issue (8): 37-39.DOI: 10.3969/j.issn.1001-5485.2013.08.0;2013,30(08)

• 施工导截流 • 上一篇    下一篇

陡坡导流隧洞进口体型试验研究

石教豪1，刘毅2，段春荣3，盛君1   

  1. 1.长江科学院水力学研究所，武汉430010;
    2.长江科学院长江工程建设监理有限责任公司，武汉430010;
    3.长江水利委员会长江勘测规划设计研究有限责任公司，武汉430010
  • 收稿日期:2013-04-16 修回日期:2013-08-13 出版日期:2013-08-13 发布日期:2013-08-13
  • 作者简介:石教豪(1976-)，男，湖北大冶人，高级工程师，主要从事水工水力学方面的研究，(电话)027-82829903(电子信箱)shijiaohao@126.com。

Research on the Inlet Shape of Steep Diversion Tunnel by Model Test

SHI Jiao-hao1, LIU Yi2, DUAN Chun-rong3,SHENG Jun1   

  1. 1. Hydraulics Department, Yangtze River Scientific Research Institute, Wuhan 430010, China;
    2.Wuhan Changke Engineering Construction Supervision Co. Ltd., Wuhan 430010, China;
    3.Changjiang Institute of Survey, Planning, Design and Research, Wuhan 430010, China
  • Received:2013-04-16 Revised:2013-08-13 Online:2013-08-13 Published:2013-08-13

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摘要： 陡坡导流隧洞由于坡度较陡，洞内流态不好控制，进口体型优化比较关键。针对某项目施工导流工程进行了1∶85水工整体模型试验，通过对进口、洞身流态进行比较，提出了隧洞进口布置形式的推荐方案，结果表明:方案一进口顶部采用椭圆形式，虽然在2级流量下，上游水位大大降低，但在导流设计流量条件下洞身形成明满流交替现象，对洞身安全不利;方案二隧洞进口采用锐缘形式，使导流洞的泄流能力、进口及洞内流态、压力特性均满足设计要求，可确保在各级导流流量下，洞身段均为明流，故建议将其作为推荐方案。研究成果可供设计参考应用。

关键词: 导流, 隧洞, 进口, 流态, 体型

Abstract: Since the flow pattern in steep slope pilot tunnel is difficult to control, it’s critical to optimize the inlet shape. A 1∶85 hydraulic model test is carried out for the diversion work of a project construction. By comparing the inlet and the flow pattern in the tunnel, it’s found that elliptic top of the inlet is detrimental to the tunnel safety. Although the upstream water level under two-stage flow conditions is reduced remarkably, the mixed free-surface-pressure flow occurs in the tunnel under the diversion flow design condition. The type of tunnel inlet with sharp edge is recommended, with which the discharge capacity, the flow pattern, and the pressure characteristics could all meet the design requirements. It can ensure that the flow in the tunnel is always free flow at all levels of diversion flow.

Key words: flow diversion, tunnel, inlet, flow pattern, shape

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