苏州河底泥疏浚关键技术研究

Research on key technology of sediment dredging in Suzhou River

苏州河底泥疏浚有别于常规工程疏浚,故疏浚断面不能简单以排水断面确定。由于目前我国尚无河湖底泥污染物控制标准,设计只能根据底泥污染垂直分布特性、土壤质量标准、苏州河生物毒性指标、土壤背景值等情况,参考美国、加拿大以及欧州一些国家和我国香港、台湾地区的研究成果和实践经验,研究确定苏州河底泥污染物控制指标,确定期望疏浚泥面线,并综合考虑防汛墙稳定、景观水库、施工控制等要求,对65个典型断面逐个拟合确定了疏浚设计断面。其工程经验可为同类工程参考。

Sediment dredging in Suzhou River is different from general engineering dredging and the dredging section can not be simply determined according to drainage section. So far, specifications such as＂ Control Code of Sediment Pollutant in River and Lake＂ has not been published in China, dredging design of Suzhou River can only be conducted according to vertical pollution distribution characteristics of sediment, soil quality standard, biological toxicity index of the river, soil background value etc. and referring the research achievements and practical experience in American, Canada, the Europe, Hongkong area and Taiwan of China. In the dredging design of Suzhou River, the pollutant control indexes of sediment was researched and the expected dredging elevation line was determined firstly and then the 65 typical sections were fitted and determined one by one by comprehensively considering the requirements of flood control wall stability, landscape reservoir and construction control etc. The design experience can be referred by other projects.