高含水率疏浚淤泥透气真空防淤堵模型  

Anti-clogging Model of Dredged Clays Dewatering with Ventilating Vacuum Method

作　　者：吉锋 邓东升[1] 洪振舜 李辉 别学清[3] 丁建文[2] 

机构地区：[1]南水北调东线江苏水源有限公司,南京210029 [2]东南大学交通学院,南京210096 [3]江苏省工程勘测研究院有限责任公司,江苏扬州225002

出　　处：《土木建筑与环境工程》2013年第1期26-31,共6页Journal of Civil,Architectural & Environment Engineering

基　　金：国家自然科学基金(51178107;41172240)

摘　　要：透气真空技术解决了传统真空处理高含水率疏浚淤泥存在的淤堵问题,但其防淤堵控制尚缺乏有效分析方法。利用Ruth滤水理论建立了高含水率疏浚淤泥径向排水模型,采用透气真空抽水模型的试验结果验证了模型的有效性。同时,明确了反映淤泥排水层滤水性能的径向平均比阻arav在抽水过程中的变化规律:传统真空抽水形成的淤泥排水层有一个被压密的过程,孔隙结构不稳定,排水管道易发生淤堵;而采用透气真空抽水可以使淤泥排水层形成相对稳定的孔隙结构,有效地防止淤堵现象的发生。Ventilating vacuum method can overcome the clogging problem which often occurs on the traditional vacuum method dewatering dredged clays with high initial water contents. However, how to analyze the anti-clogging behavior of ventilating vacuum method is an important issue in practical engineering. A radial drainage model was established based on the filtration theory developed by Ruth. The vanity of the model was verified using the test results of ventilating vacuum, and the change law in average radical dewatering resistance of dewatering layer which reflects the filtration performance was investigated during the dewatering process. It is indicated that the dewatered layer is compacted by traditional vacuum method during the dewatering process. Its corresponding pore structure is unstable, thus the drainage pipeline often clogs. While the technique of ventilating vacuum provides a powerful way to overcome the clogging problem, and the pore structure is stable during the dewatering process.

关 键 词：透气真空 防淤堵 淤泥排水层 孔隙结构 径向平均比阻 

分 类 号：TU471.8[建筑科学—结构工程]