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今年七月中旬湖口县南北港圩堤在抗御少见的高水位情况下,又遇4～7级南风,浪高达3.5米以上,而且持续时间达半月之久,致使整个圩堤外坡干砌石水泥勾缝护坡工程50％以上不同程度地冲毁,对圩堤威胁很大。其中以西端靠涵闸附近最危险,有三处被风浪淘空。当时由于风浪大,坡度陡,块石数量有限,抛少量块石无法固定,必须抛大量块石从坡脚到水面以上才能有效。但在当时因受水运速度限制,在时间上满足不了抢险需要,用其他办法如停靠木排、船只等更是难办。在这紧急关头,我们采用铁丝捆石块的方法防浪(见右图),通过今年汛期实践,此法有下述二条优点:
In mid-July of this year, the north-south harbor embankment of Hukou County resisted the uncommon high water level. In the case of rare high water level, it encountered another 4 to 7 southerly winds and the wave height was more than 3.5 meters. The duration of the embankment lasted for about half a month, More than 50% of stone cementing slope protection project destroyed to varying extents, threatening to the levee. One of the most dangerous near the Culvert by the west end, there are three were Amoy Amoy. At that time, due to large waves, steep slopes, a limited number of stones, cast a small amount of stone can not be fixed, you must throw a large number of stones from the foot to the water above the surface can be effective. However, due to the limitation of water transport speed at that time, it could not meet the emergency needs in time. It is even more difficult to use other methods such as docking of wooden rafts and vessels. At this critical juncture, we use the method of wire and boulders to prevent waves (see photo to the right). Through the practice of this year’s flood season, this method has the following two advantages: