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一、前言潜没式深孔闸门的工作水头都比较高,一般在数十米至上百米,有的高达数百米。这样高的工作水头,一些大型闸门承受的水压力就相当大了(如龙羊峡水电站底孔弧门(5×7—120)承受的水压力达6000余吨)。这将导致门体及支臂变形,止水不严,因而产生狭缝射流,往往引起埋件汽蚀破坏,严重时引起闸门振动,损伤门体。目前,弧形闸门止水的可靠性,特别是顶止水的可靠性是潜没式深孔闸门的老大难问题。数十年来,有关工程技术人
First, the preface Submerged deep-hole gate work head are relatively high, usually in the tens of meters to the upper 100 meters, and some up to several hundred meters. Such a high head of work, some large gate withstand water pressure is quite large (such as Longyangxia Hydropower Station bottom hole arc door (5 × 7-120) under water pressure of 6,000 tons). This will lead to deformation of the door and arm, water tight lax, resulting in a slit jet, often cause cavitation damage buried parts, causing severe vibration gate, damage the door. At present, the reliability of the water gate of the arc gate, especially the reliability of the top water stop, is a long-standing problem of the submerged deep-hole gate. For decades, the engineering and technical people