城市河道环保疏浚的试验研究

Experimental study on environmental dredging of a city river

在天津大沽排污河综合治理之前,在外环线9号桥至10号桥之间选取一段约100m长的河道作为试验段,对几种疏浚方案进行生产性试验,用以对整条大沽河的疏浚进行指导.试验研究的内容包括沉积物的开挖、运输、脱水.试验中的2种清淤方法为水力清淤和机械清淤;3种运输方式为卡车、罐车和管道运输;3种脱水方法为风干、机械脱水和抽真空脱水.工程实施过程对环境的影响符合环保的要求.最后,对2种清淤方法、3种脱水方法和3种运输方法的组合,综合造价、对环境的影响、实施速度等因素进行了组合排序.

Prior to rehabilitating the Tianjin City's Dagu Sewerage River,a test section of this river is chosen as the pilot site to perform the productive testing for dredging. The results obtained will provide the guidance in the dredging. The test program comprises excavation,transport and dehydration. There are two methods of dredging:hydraulic and mechanical;three methods of transport:truck,cistern and pipeline;three methods of dehydration:air drying,mechanical and vacuum dehydration. The process of this construction conforms to the requirements of environmental protection. Finally,the paper has evaluated the general cost,environmental effects and implementation space for each of the above construction methods.