Padma河道整治工程土工沙袋抛填施工方法对比
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摘要
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。
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.
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.
引文
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[2]程龙飞,何运祥.土袋护岸结构施工技术[J].施工技术,2012,41(15):103-105.
[3]吴江滨,周玲霞,李恺,等.长江大胜关深槽贴岸河段沙袋护岸工程实践[J].人民长江,2015,46(S1):92-94.
[4]陈宋洁,刘俏武.孟加拉国袋装砂抛填施工技术和管理[J].交通工程建设,2016(1):59-63.
[5]吴晓南,郭素明.深水袋装砂软基筑堤工艺的改进与应用[J].港口科技,2015(1):7-11.
[6]田正宏,迟福海,肖洋,等.长江南京段沙袋深水护岸施工技术[J].施工技术,2013,42(21):47-50.
[7]王哲,袁浩伟.深水抛填袋装砂的施工控制[J].港工技术与管理,2016(2):50-53.
[8]赵国权,丁付革.深水域抛填袋装砂筑堤工艺探索[J].中国水运(下半月),2013,13(9):214-217.
[9]应强,张幸农,李伟.沙袋在水流中的沉速、落距[J].泥沙研究,2009(1):15-19.
[10] DASSANAYAKSE D. Experimental and numerical modelling of the hydraulic stability of geotextile sand containers for coastal protection[D]. Braunschweig:TU Braunschweig,2013.
[11]陶润礼,袁超哲,王健,等.小型袋装砂抛填水下轨迹模拟与分析[J].中国港湾建设,2017,37(3):18-21+42.
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