导流洞改建有压突扩泄洪洞研究
Study on the Reconstruction of Diversion Tunnel intoPressure Sudden Enlargement Release Tunnel
作者：高鹏(二滩水电开发有限责任公司，四川 成都 610021)；杨永全(四川大学 水力学与山区河流开发保护国家重点实验室，四川 成都 610065)；许唯临(四川大学 水力学与山区河流开发保护国家重点实验室，四川 成都 610065)
Author：(Ertan Hydropower Development Co., Ltd., Chengdu 610021, China)；(State Key Lab. of Hydraulics and Mountain River Eng., Sichuan Univ., Chengdu 610065, China)；(State Key Lab. of Hydraulics and Mountain River Eng., Sichuan Univ., Chengdu 610065, China)
收稿日期：2007-06-20 年卷（期）页码：2008,40(2):1-7
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：导流洞；有压突扩泄洪洞；有压流；明渠流；水力特性
Key words：diversion tunnel；sudden enlargement flood release tunnel；pressure flow；open channel flow；hydraulic characteristics
基金项目：国家自然科学基金委员会、二滩水电开发有限责任公司雅砻江水电开发联合研究基金资助项目（50539060）;国家杰出青年科学基金资助项目（50325928）
中文摘要
龙抬头式泄洪洞是中低水头水电站导流洞改建泄洪洞的常用方式，但其应用受到地形地质条件限制。为解决狭窄河谷地区中低水头导流洞改建泄洪洞的布置和消能问题，通过模型实验和数值模拟并结合具体工程实际，因地制宜的提出有压突扩泄洪洞这种新型式的导流洞改建泄洪洞布置方式。研究结果表明这种方式改建的泄洪洞具有如下特点：水流直接由有压流向无压明渠流转换，流态简单，有压消能和无压消能相结合；平面上洞轴线方向可以根据地形、地质和施工条件灵活选择；工作闸门可以灵活布置；结构简单、施工方便、造价低等。这种方式改建的泄洪洞可用于中低水头大流量泄洪工程，具有较高的推广应用价值。
英文摘要
High head ogee spillway is the most usual way for medium or low head hydropower stations to reconstruct the spillway tunnel. Due to the condition limitation of the topography and geology, some stations cannot employ in this way. A new way to reconstruct diversion tunnel into sudden enlargement flood release tunnel with pressure is proposed in this paper. The experiment researches show that this reconstruction have the characteristics as follows: water flow directly flows from pressure to open channel flow and the flow pattern is simple; the direction of the tunnel can be changed flexibly according to the actual condition of topography、geology and construction on the level surface; the work gateway can be arranged at the intake or at the junction between the pressure flow and the open channel flow; the structure is simple, the construction is convenient and the cost is low. The flood release tunnel rebuilt in this way is applicable to the station with medium or low head and large discharge, which will have high practical value.
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