复杂条件下某大型挡潮闸的设计方案研究

Study on the design scheme of a large tidal sluice under complex conditions

海南某岛群由若干岛屿串联而成,现状以若干座涵管桥连接,海域被分割为内海和外海。现斜坡堤结构型式的涵管桥需要拆除,并在原址上新建挡潮闸和桥梁,以满足防洪、排涝、挡潮及交通需要。拟新建的若干个挡潮闸中,1号闸濒临外海,垂直方向总宽422 m,由多孔水闸并联构成,其规模在现有挡潮水闸中罕有;同时,不同于内河水闸或一般沿海挡潮闸,1号水闸直接受外海大的波浪作用,其影响在现有挡潮水闸中亦属罕见;作为定位高端文旅重地,新建水闸尺度受桥梁及景观影响,闸宽、闸高均受到限制,增加了结构和闸门设计难度。该工程挡潮闸规模大,重要性高,以1号水闸为研究对象,根据工程和受限条件,研究探讨了闸顶标高、闸底标高和门顶标高等主要高程的选定,对不同类型的闸门进行了比较,通过结构分析,初步选定了结构的主要尺度和基础形式。研究成果对类似工程具有重要借鉴意义。

One island group in Hainan is composed of several islands connected in series.The current situation is connected by several culvert bridges,and the sea area is divided into inland sea and outer sea.At present,these culvert bridges of slope embankment structure need to be removed,and new tidal sluices and bridges should be built on the original site to meet the needs of flood control,drainage,tidal retaining and traffic.Among these sluices,the No.1 sluice is close to the sea,with a total width of 422 m in the vertical direction.It is composed of multi-hole sluices in parallel,and its scale is rare in the existing tidal sluices.At the same time,different from inland river sluices or general coastal tide sluices,No.1 sluice is directly affected by large waves from the sea,and its influence is also rare in the existing tide sluices.As an important location for high-end cultural tourism,the scale of the newly built sluice is affected by the bridge and landscape,and the width and height of the sluice are restricted,which increases the difficulty of structure and gate design.This project sluice scale is large,the importance is very high,this article takes No.1 sluice gate as the research object,according to the engineering and the limited condition,the research discusses the sluice top elevation,the sluice bottom elevation and the gate top elevation and so on the main elevation selection,carries on the comparison to the different types of sluice gate,through the structural analysis,preliminarily selected the main scale of the structure.This paper can be used as a reference for similar projects.