龙羊峡水电站挑流水雾诱发滑坡问题

On landslide induced by water－fog from ski－jump energy dissipation of Longyangxia Hydropower Station

本文讨论了龙羊峡水电站建设过程中发生的一个由挑流水雾诱发的滑坡问题，规模很大，滑体为百万立方米级。在我国这是一个新问题，就世界范围论也极其罕见。龙羊峡虎山坡挑流水雾诱发滑坡有其特殊原因，它们是特殊地质背景情况下F306的存在和干旱气象因素。同时变形、滑动表明，诱发岸坡失稳的挑流流量和水头并不很大，这对非干旱地区的高水头挑流、跌流大坝工程，也仍有实际参考意义。自本次事件后，全国范围内对水雾问题的认识有了一个新的飞跃，首次实际地建立了水雾诱发滑坡的概念，并得到了愈来愈多的重视。

 This paper discusses the landslide occurred during the dam construction． The scale of the landslide induced by water－fog from ski－jump energy dissipation is up to the millions of cubic metre its occurrence has the special reasons for instances arid climatic factor and the existence of the F306 fault on the background of special geological condition． Simultaneously the deformation and slide show that the jump head is not much high and the quantity of ski－jump flow is not so much which induced the slope instability． It is also of practical reference to the projects located in the non－dry region that are of the high jump head and big fall． The recognition for the landslide induced by water－fog has much developed in China since the event occurred． The concept of landslide induced by water－fog is practically founded at the first time and will attract more and more attentions．