感潮河段水利工程施工围堰及导流技术

Construction Cofferdam and Diversion Technology of Water Conservancy Project in Tidal Reach

沿海一带,由于离海较近,受海水涨落潮的影响,出现大量内涌河水位随海水涨落潮进行变化的感潮河段,在感潮河段进行水利设施施工具有地质条件复杂、河水位受潮水位的影响变化频繁、导流难度大等特点[1]。以黄埔区西滘涌墩头涌水闸和东滘涌水闸施工为例,从导流规划,导流方案选择,围堰设计,钢板桩围堰施工,膜袋砂围堰施工,围堰监测等方面进行阐述,介绍了在感潮河段水闸施工导流及围堰的综合施工方法和技术。

Affected by the rising and falling tide of sea water, there are a large number of tidal river sections with the rising and falling tide of sea water in the coastal area. The construction of water conservancy facilities in the tidal river section has the characteristics of complex geological conditions, frequent changes of the water level affected by the tide, and great difficulty in guiding the flow. Taking the construction of duntouchong sluice and dongjiaochong sluice in Huangpu District as examples, this paper expounds the diversion planning, diversion scheme selection, cofferdam design, steel sheet pile cofferdam construction, film bag sand cofferdam construction, cofferdam monitoring and other aspects. And this paper introduces the comprehensive construction methods and technologies of diversion and cofferdam construction in tidal reach.