淤泥地质条件下模袋砂围堰水闸施工技术的优化

Optimization of geofabric bag sand cofferdam gate construction technology under sludge geological condition

围堰施工技术是水利建设工程中的关键环节。由于河道淤泥含水量高,承载力远远不足,存在着普通砂土围堰沉降大,容易造成淤泥扰动、滑塌,不稳定,难干成型等问题。作为七种常见围堰施工技术之一的模袋砂围堰具有机械化施工程度高、模袋砂护岸整体性能良好、抗冲刷能力强、能减少施工沉降等优点而被优先采用。结合实际工程条件,优化提出"松木桩+模袋牛皮砂"式围堰新工艺,成功解决了淤泥质地基中围堰施工沉降大、稳定性差的问题。为类似工程施工提供了有效参照依据。

The cofferdam construction technology is a key link of water conservancy construction project.Since the river sludge has high water content,bearing capacity is not enough,and common sand cofferdam has the defects of large settlement.The problems of silt disturbance and slump,difficult stabilization and difficult shaping can be easily created.Geofabric bag sand cofferdam has the advantages of high degree of mechanization construction,good overall performance of geofabric bag sand revetment,strong resistance to scour,reduction of construction settlement,etc.as one of seven common cofferdam construction technologies,which is preferably adopted.Actual engineering conditions are combined,the new technology of ＇pine pile ＋ geofabric bag leather sand＇ cofferdam is optimized and proposed,which solves the problems of large cofferdam construction settlement and poor stability in sludge foundation,and effective reference basis is provided for the construction of similar projects.