城市内湖环保绞吸式清淤施工技术应用

Construction Technology Application of Environmental Protection Twisted Suction Dredging for Urban Inner Lake

城市内湖因水域宽、位于多种用地相互交错地带等特征,而存在周边污水直排入湖、悬浮质沉积形成的淤泥存量大等问题,导致水质降低,出现黑臭污染。由于清淤施工体量大,一般清淤方式对清淤厚度的控制和淤泥输送能力不足,容易出现超挖、漏挖或造成二次污染。在内湖清淤中如何兼顾环保、高效和低风险,项目采用内湖环保绞吸式清淤方法,以实现低扰动、高精度、全封闭的环保清淤作业。

Due to wide water area and interlaced area of various land uses,there are problems such as direct discharge of peripheral sewage into the lake and large amount of sludge deposited by suspended sediment,which lead to water quality reduction and black odor pollution.Due to the large volume of dredging construction,the control of dredging thickness and insufficient silt conveyance capacity by general dredging methods are liable to overexcavation,excavation leakage or secondary pollution.In order to take environmental protection,high efficiency and low risk into account in silting cleaning of inner lake,the project adopts the method of environmental twisted suction of inner lake to achieve low disturbance,high accuracy and fully enclosed environmental protection silting operation.