土工管袋用于湿地疏浚淤泥脱水处理效果评估  

Evaluation of Dehydration Treatment Effect of Wetland Dredged Sludge with Geotextile Pipe Bags

作　　者：郑华 尹昭宇 林宇杰 詹良通[2,3] ZHENG Hua;YIN Shaoyu;LIN Yujie;ZHAN Liangtong(Wenzhou University of Technology,Wenzhou 325035,Zhejiang,China;Institute of Geotechnical Engineering,Zhejiang University,Hangzhou 310058,Zhejiang,China;Key Laboratory of Ministry of Education on Weak Soil and Environmental Geotechnical Engineering,Zhejiang University,Hangzhou 310058,Zhejiang,China)

机构地区：[1]温州理工学院,浙江温州325035 [2]浙江大学岩土工程研究所,浙江杭州310058 [3]浙江大学软弱土与环境土工教育部重点实验室,浙江杭州310058

出　　处：《浙江水利科技》2022年第4期51-55,共5页Zhejiang Hydrotechnics

基　　金：浙江省重点研发计划项目(2019C03107)。

摘　　要：湿地淤泥疏浚能改善船只通行条件和水体环境质量,淤泥的脱水处理是疏浚工程的重要环节。基于温州生态园三垟湿地起步区环保疏浚工程,开展土工管袋用于水力疏浚淤泥就地脱水处理处置的现场实践。首先针对湿地淤泥物化特性和空间变异性,通过快速脱水试验(RDT)研究絮凝剂种类和掺量对疏浚淤泥脱水性能的影响规律,并对不同水域的淤泥推荐絮凝剂的种类及最优掺量。工程实施完成后,对土工管袋进行破袋取样及含水率测试,结果表明:该工艺具有减量效果好、无需外运处置、节省造价等优点。Wetland sludge dredging can improve the passage conditions of vessels and the quality of water environment.Sludge dehydration is an important part of dredging engineering.Based on the environmental protection dredging project in the start-up area of Sanyang Wetland in Wenzhou Ecological Park,geotechnical pipe bags were used for in-situ dehydration treatment and disposal of hydraulic dredging sludge.First,according to the physicochemical characteristics and spatial variability of wetland sludge,the influence of flocculant type and dosage on the dehydration performance of dredged sludge was studied through rapid dehydration test(RDT),and the type and optimal dosage of flocculant were recommended for sludge in different waters.After the completion of the project,these bags were teared down to take sampling and conduct moisture content test.Results show that this technology has advantages of reducing flocculant typedosage,no need of transportation and disposal of sludge and saving costs.

关 键 词：土工管袋 湿地疏浚淤泥 脱水处理 快速脱水试验 

分 类 号：X703[环境科学与工程—环境工程]