水力冲挖淤泥水平电渗联合堆载预压法脱水试验研究  

Experimental Study on Dewatering of Hydraulic Silts by Horizontal Electroosmosis Combined with Surcharge Preloading

作　　者：杨洋 陈人瑗 邱珍锋[2] 武立清 YANG Yang;CHEN Renyuan;QIU Zhenfeng;WU Liqing(PowerChina Huadong Engineering Corporation Limited,Hangzhou 311122,China;Engineering Research Center of Diagnosis Technology and Instruments of Hydro-Construction,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122 [2]重庆交通大学重庆市高校水工建筑物健康诊断技术与设备工程研究中心,重庆400074

出　　处：《人民珠江》2021年第4期64-69,共6页Pearl River

基　　金：重庆市教育委员会科学技术研究项目(KJQN202000747)。

摘　　要：城市水环境治理工程中会产生大量疏浚淤泥,淤泥含水量高、体量大,直接堆场弃置将浪费城市宝贵的土地资源。设计水平电渗法处理水力冲挖淤泥的模型试验,采用水平电渗联合堆载预压的方法对水力冲挖淤泥进行脱水处理,验证了电渗法用于淤泥脱水处理的可行性,论证了水平电渗法的优势。试验表明,上部施加荷载可以限制淤泥的裂缝宽度,上部荷载越大,淤泥裂缝的宽度越小,淤泥的沉降越大;上部荷载越大,淤泥的排水量越大且处理后的含水率更低;上部施加荷载可以延迟电流的衰减,延后有效电势的降低,有利于淤泥排水固结;电渗末期能耗高、排水少,在实际应用中应该在此阶段前停止电渗。A large amount of dredging silt will be produced in the urban water environment treatment project.With high water content and large volume,the silt will occupy a lot of land resources after being dumped in the storage yard directly.This paper designs a model test for the treatment of hydraulic silts by the horizontal electroosmosis method,performs the dewatering of hydraulic silts through the horizontal electroosmosis combined with surcharge preloading,verifies the feasibility and advantages of horizontal electroosmosis for silt dewatering.The test results show that:The upper load can limit the crack width of silt.The larger the upper load is,the smaller the crack width of silt is,the bigger the silt settlement is,the larger the silt displacement is,and the lower the moisture content is.The upper load can delay the attenuation of electric flow and the reduction of the effective electric potential,which is conducive to the dewatering and consolidation of silt.At the final stage of electroosmosis,the energy consumption is high and the dewatering is small.Therefore,in practical application,electroosmosis should be stopped before this stage.

关 键 词：水力冲挖淤泥 水平电渗 堆载预压 淤泥脱水 

分 类 号：TU447[建筑科学—岩土工程]