1.上海大学 土木工程系;2.温州大学 建筑工程学院
1.Department of Civil Engineering, Shanghai University;2.College of Architecture and Civil Engineering, Wenzhou University
The National Basic Research Program of China (973 Program)(2016YFC0800200)，The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)(grant No. 51878402, 51678352 and 51778500 ),Program of Science and Technology of Wenzhou(grant No. S20180002)，Science and Technology Association of Wenzhou(grant No. 2019KXCX-RH5)
A large number of dredged slurry are produced in the coastal area. In order to study the treatment methods of dredged slurry, in this paper, an indoor model test was conducted to improve dredged slurry in Wenzhou area by stepped vacuum preloading combined with intermittent electroosmosis, and the time of intermittent power-on and intermittent stepped voltage electroosmosis were examined. The vacuum pressure, current, drainage and surface settlement were monitored during the test. After the test, the moisture content, vane shear strength of soil and the corrosion quality of electrodes were measured. The test results showed that although the longer the time of intermittent power-on, the better the consolidation effect of soil, when the time of intermittent power-on exceeded 24 hours, the effect of soil improvement began to weaken; however, the corrosion quality of electrodes and the average energy consumption coefficient of intermittent electroosmosis were still positively correlated with the time of intermittent power-on. In addition, compared with the stepped vacuum preloading combined with intermittent electroosmosis method, the stepped vacuum preloading combined with intermittent stepped voltage electroosmosis method obtained better soil improvement, the corrosion quality of electrodes and the average energy consumption coefficient of intermittent electroosmosis of which were also significantly reduced.