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首页> 外文期刊>International Journal of Offshore and Polar Engineers >Improvement of Marine Sediment by Combined Electrokinetic and Chemical Treatment
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Improvement of Marine Sediment by Combined Electrokinetic and Chemical Treatment

机译：电动和化学处理相结合改善海洋沉积物

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摘要

An experimental study is conducted on combined electrokinetic and chemical processes for improving marine sediment. The electrokinetic and chemical treatment is carried out on marine sediment from the Korean coast. The soil is mixed with chemical admixtures, including sulphate-resistant cement, quicklime, and coal fly ash, and is treated with a DC current. The effectiveness of the combined treatment is evaluated in terms of the undrained shear strength and compressibility, as well as soil characteristics such as the water content, plasticity (Atterberg limits), carbonate content, and pore water chemistry. The results of this study show that the combined electrokinetic and chemical treatment nearly doubled the undrained shear strength of the marine sediment after 7 days, compared to the chemical treatment over the same time period. In addition, the preconsolidation pressure of the EK and chemical-treated sediment increased to as high as 500 kPa when the soil sample was consolidated under a surcharge pressure of 5 kPa, compared to that of 220 kPa after the chemical treatment under the same condition. The improvement is attributed to significant cementation effects generated by both electrokinetics and electrochemical reactions.
机译：进行了电动和化学过程相结合以改善海洋沉积物的实验研究。电动和化学处理是在韩国海岸的海洋沉积物上进行的。将土壤与化学外加剂混合，包括耐硫酸盐的水泥，生石灰和粉煤灰，并用直流电对其进行处理。根据不排水的剪切强度和可压缩性以及土壤特性（例如水含量，可塑性（Atterberg限值），碳酸盐含量和孔隙水化学性质）评估组合处理的有效性。这项研究的结果表明，与同期化学处理相比，电动和化学处理相结合在7天后几乎使海洋沉积物的不排水剪切强度增加了一倍。此外，当土壤样品在5kPa的附加压力下固结时，EK和化学处理的沉积物的预固结压力增加到高达500 kPa，而在相同条件下经过化学处理后的预固结压力则为220 kPa。改善归因于由电动反应和电化学反应产生的显着的胶结作用。

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