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利用自主研制的室内试验装置,同时进行了3组室内电动加固试验。试验中,CaCl_2溶液的浓度为唯一变量,以此探讨CaCl_2溶液浓度对淤泥质软黏土的电动加固机理。利用观测记录的电流、电压及通电结束后土体承载力等指标,分析了不同浓度的CaCl_2溶液对电动加固的影响。结果表明:浆液的浓度对强度有很大的影响,浓度为26%的浆液对土体的电动加固效果最好,16%的浆液次之,36%的浆液最差。依据室内试验结果,在大连东港商务区进行了现场试验,结果表明:土体的整体承载力较加固之前有很大的提高,而且随着龄期的增长,强度不断增大。
Using self-developed indoor test device, at the same time conducted three groups of indoor electric reinforcement test. In the experiment, the concentration of CaCl 2 solution was the only variable, so as to discuss the mechanism of electric reinforcement of silty soft clay by CaCl 2 concentration. The effects of different concentrations of CaCl 2 solution on the electric reinforcement were analyzed by observing the recorded current and voltage and the bearing capacity of the soil after the electrification. The results show that the concentration of slurry has a great influence on the strength of the soil. The concentration of 26% is the best for the electric reinforcement of soil, followed by 16% of the slurry and 36% of the slurry. According to the indoor test results, a field test was conducted in Dalian Donggang Business District. The results show that the overall bearing capacity of soil increases greatly compared with that before consolidation, and its strength increases with the increase of age.