和畅洲左汊口门控制工程塑枕潜坝落距控制研究

Study on drop-distance of plastic-sand-pillow in construction of submerged dyke for river mouth control project of left braided channel at Hechangzhou of Yangtze River

镇江市和畅洲左汊口门控制工程是长江镇扬河段二期整治工程中一项重要工程,工程主要内容是利用聚丙烯编织袋充填江沙,水上抛投,形成水下潜坝束流。针对工程中的主要难点———塑枕落距控制研究,文中总结了简单易行的塑枕抛投落距公式,可供有关工程参考。

The river mouth control project of the left braided channel at Hechangzhou of Zhenyang Reach on the Yangtze Rive is an important works within the Phase II of Zhenyang Reach River Training Project; of which the main construction is to build a submerged dyke to restrict the flow therein and the dyke is constructed by polypropylene（PP） woven bags filled with sand which are placed by throwing them into the river. As rthe drop-distance of the plastic-sand-pillow into the river is difficult to be controlled, a study is made and then a simple formula for calculation of the drep-distance is given and summarized herein; which can be used for a reference for the similar projects concerned.