耙吸挖泥船挖掘多杂物珊瑚胶结砂施工工艺

Construction technology of dredging coral reefs with many debris by trailing suction hopper dredger

耙吸船是疏浚工程中应用最广泛的船型之一,适合开挖淤泥、黏土甚至碎石等土质。坦桑尼亚某港口的土质主要是珊瑚胶结砂,其标贯击数达50击,挖掘易成块;且表层存在大量轮胎、渔网及船锚等杂物,堵塞耙头严重。耙吸船在施工过程中需要解决杂物及珊瑚胶结砂成块堵耙的问题,两者堵耙工况完全不同,无法单一处理。通过现场多方面技术参数分析,采取制作专用清杂工具、耙吸船设备改造以及施工工艺改进等措施,达到提升耙吸船施工效率的目的,可为耙吸船疏浚多杂物、易成块土质提供参考。

Trailing suction hopper dredger(TSHD)is one of the most widely used ship types in dredging projects,which is suitable for excavation of soil such as mud,clay and even gravel.The soil quality of a port in Tanzania is mainly coral glue sand,its standard penetration number is up to 50 strikes,and it is easy to block,and the blocking head is serious.There are a large number of tires,fishing nets,and anchors on the surface,blocking the rake head seriously.In the process of construction,it is necessary to solve the problem that debris and coral cement sand block up the rake,the working conditions of the two are completely different,and can not be dealt with alone.Based on the analysis of various technical parameters on site,this paper takes measures such as making special cleaning tools,transforming TSHD equipment and improving construction technology to achieve the purpose of improving the construction efficiency of TSHD.It can provide a reference for dredging multi-debris and easy to block soil using TSHD.