河道整治工程中围堰施工技术分析

Analysis of Cofferdam Construction Technology in River Regulation Project

以南京金川河整治工程为例,对桩模围堰在该河道治理工程岸坡加固中的应用过程展开分析探讨。结果表明,桩模围堰施工过程简便,对材料加工无过多要求,在保证导流过水能力的同时能有效缩短工期;与传统的草土围堰、土石围堰等形式相比,桩模围堰防渗效果好,支撑结构稳定,对于水深在5 m以内、水流流速在1.50 m/s以下,且对水质要求高的河道清淤疏浚及岸坡加固工程而言较为适用。

Taking the Jinchuan river regulation project in Nanjing as an example,the application process of pile-form cofferdam in bank slope reinforcement of the river regulation project is analyzed and discussed.The results show that the construction process of pile-form cofferdam is simple.There is not too much requirement for material processing.and the construction period can be shortened effectively while the water diversion capacity is ensured.Compared with traditional forms such as grass soil cofferdam and earth rock cofferdam,pile formwork cofferdam has good seepage prevention effect and stable support structure,which is suitable for the river dredging and bank slope reinforcement projects with water depth less than 5 m and flow velocity less than 1.5 m/s and high water quality requirements.