受污染河湖的疏浚底泥快速脱水干化新工艺的应用

摘要

According to the characteristics of dredged sediment from polluted rivers and lakes as well as the advantages and disadvantages of the existing quick dewatering and drying technology,a new technological process of quick dewatering and drying named free water infiltration method,combining with the characteristics of chemical dehydration method and vacuum preloading method,was invented after theoretical research and field test. This new technological process was applied in Taihu lake Zhushan bay and load-carrying capacity is 40 kPa after 90 days' dewatering and drying with lower cost and without changing property of sediment.%基于受污染河湖的疏浚底泥特征和现有快速脱水干化技术的优缺点，在理论研究和现场试验中结合传统的化学辅助脱水法和真空预压法的特点，提出一种自由水渗透法的污染底泥快速干化新工艺。该工艺应用于太湖竺山湾疏浚底泥干化示范工程，疏浚干化90 d后，整体承载力达到40 kPa，造价低于传统的地基处理技术，且不改变土的原有性质。