Abstract
Soil voltage is generally assumed to show a linear relationship with distance from the cathode according to the established electroosmotic consolidation equation. However, this assumption is inconsistent with experimental results. To more reasonably reflect the soil consolidation process during electroosmosis treatment, it is necessary to consider the influence of the actual soil voltage distribution trend when establishing the electroosmotic consolidation equation. Electroosmosis results show that soil voltage exhibits nonlinear distribution characteristics against distance from the cathode. The change trend of soil voltage can be well reflected by cubic polynomial fitting. Then, the anodic electrode was taken as the research object, and a two-dimensional horizontal plane model of electroosmosis was established because it represents practical electroosmosis applications more closely than some other models. Based on this established model, the dissipation equation describing the excess pore water pressure and the soil consolidation equation were derived for the electroosmosis treatment process. The derivation process considered both linear and nonlinear soil voltage distributions, wherein the anode was closed and the cathode was open. Finally, the analytical solution was analyzed and validated with model test cases in terms of the excess pore water pressure and average moisture content of the soil. The trend observed in the measured excess pore water pressure was more consistent with that of the theoretical results calculated assuming a nonlinear soil voltage distribution than that obtained using a linear distribution. In addition, the measured values of the average moisture content in the soil were closer to the values calculated under a nonlinear distribution of soil voltage than to those calculated under a linear distribution. These results further show that the established consolidation equation is reasonable when a nonlinear distribution of soil voltage is considered. The proposed consolidation equation can thus improve the application of electroosmotic methods in the future.
Highlights
With rapid economic development and an increase in the population, the land required for infrastructure is increasing in various industries
E average soil moisture content obtained under the assumption of a nonlinearly distributed soil voltage was closer to the measured value than that obtained when the soil voltage was assumed to be linearly distributed. ese results further demonstrate that the electroosmotic consolidation theory established considering a nonlinear distribution of soil voltage is rational. e results obtained can be made more accurate using a consolidation equation considering the actual distribution of the soil voltage
A two-dimensional consolidation equation for the electroosmosis method was deduced based on the actual distribution of soil voltage in the process of electroosmosis
Summary
With rapid economic development and an increase in the population, the land required for infrastructure is increasing in various industries. Erefore, to more reasonably describe soil consolidation during electroosmosis, the actual distribution of soil voltage must be considered when establishing the electroosmosis consolidation equation to improve the theory of electroosmosis consolidation For this reason, laboratory electroosmotic tests of typical soft clay from Taizhou used in reclamation were first carried out, and the distribution of soil voltage was analyzed and discussed. E anodic electrode was studied as the research object, and a two-dimensional horizontal model was established, which produced results that were closer to the observations made in practical engineering applications than the results given by some other models Based on this model, a two-dimensional electroosmotic consolidation equation was deduced considering the actual distribution of soil voltage. The rationality of the equation was analyzed and verified by model test cases. e influence of the change in soil voltage on the electroosmosis process was analyzed by comparing the results of the proposed equation with those produced under the assumption that the soil voltage is distributed linearly
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