Vacuum Preloading Combined with Electro-Osmotic Dewatering of Dredger Fill Using Electric Vertical Drains

Abstract

Based on the vacuum preloading combined electro-osmotic consolidation method, a site comparison trial of vacuum preloading and vacuum preloading in combination with electro-osmotic consolidation was performed on Li Island, Hubei Province. The performance and drainage effects of electric vertical drains were evaluated. The problems were analyzed by monitoring test results. Test results from the field showed that the water content of the dredger fill was greatly reduced and the physico-mechanical properties and bearing capacity were improved significantly after 28 days of treatment by vacuum preloading in combination with electroosmotic consolidation. Compared with the vacuum preloading method, vacuum preloading in combination with the electro-osmotic consolidation method using electric vertical drains reduced the construction time, saved energy, and achieved an ideal reinforcement effect.

Modelling combined electroosmosis–vacuum–surcharge preloading consolidation considering large-scale deformation

“…To accelerate the consolidation, one solution is to combine the process of electroosmosis with the vacuumsurcharge preloading method, enabling a tri-element consolidation solution. The electroosmosis component has shown to be effective in driving a stream of water through a clogging smear zone or a less permeable area [6,7], and the performance complements the other two elements, as reported in various applications [8][9][10].…”

Ultra-soft Ground Improvement Using Air-Booster Vacuum Preloading Method: Laboratory Model Test Study

“…Land reclamation has become a principal technique to solve the scarcity of land resources in coastal areas. However, ultra-soft soil foundations formed by hydraulic reclamation usually have disadvantageous engineering characteristics with extremely high water content, high void ratio, high compressibility, low permeability, and low shear strength [1][2][3]. Therefore, ultra-soft soil foundations cannot be directly used for engineering applications.…”

Study on the Electro-Osmosis Characteristics of Soft Clay from Taizhou with Various Saline Solutions

“…Currently, this technology has not been widely applied in practical engineering procedures because of its low efficiency and excessive energy consumption. To improve electro-osmotic techniques, many studies on the construction techniques of the electro-osmotic method [2][3][4] have been continuously conducted, and the feasibility of combinations of electro-osmosis reinforcement technology and other foundation reinforcement technologies has also been continuously explored.…”