Padma河道整治工程土工沙袋抛填施工方法对比

针对河道整治工程中土工沙袋抛填施工方法在沙袋偏移距离、沙袋层平整度和施工效率方面的差异,对孟加拉国Padma大桥河道整治工程中采用的人工抛填、翻板抛填和导向笼抛填3种施工方法进行对比。结果表明,人工抛填施工简便,抛填小型沙袋时施工效率高,翻板抛填方法能够提高中大型沙袋抛填效率,但人工和翻板抛填方法沙袋偏移距离较大;导向笼抛填方法能有效控制沙袋下落轨迹,提高抛填准确性和抛后沙袋层平整度,在土工沙袋抛填施工中更具优势。

Comparison of construction methods for geotextile sandbag dumping applied to Padma river regulation engineering

Aiming at the differences in offset distance of sandbags,evenness of sandbag layer and construction efficiency of construction methods for dumping geotextile sandbags in the river,three construction methods,i.e.dumping by the manpower,flap and guiding cage respectively,applied to the river regulation engineering of Padma multi-purpose bridge project located in Bangladesh are compared.The result shows that the manpower dumping method is simple and the efficiency is high when dumping small sandbags,and the efficiency of dumping lager sandbags can be improved by using the flap,while the offset distance of sandbags dumped by the manpower and flap is relatively large;the guiding cage dumping method can control the falling track of the sandbag effectively and improve the accuracy and the evenness of dumped sandbag layer.By comparison,we get to know that the guiding cage method has advantages in the construction of geotextile sandbag dumping.