不同注浆位置对电化学加固黄土影响研究

Study on the Influence of Different Grouting Positions on Electrochemical Reinforcement of Loess

通过对甘肃地区黄土进行电化学固结试验,探究同一酸性调节液在不同注浆位置条件下对黄土的电化学加固影响,并对其加固机理进行分析。文中以重塑黄土土样为研究对象,采用金属电极,进行电化学加固法试验,通过对加固过程中的电流、排水量、能量消耗的变化及电化学加固前后土体含水率和土体承载力分析,得出以下结论:电化学加固法可以有效促进黄土水分的排出,同时对土体强度提升较大;与普通电渗法相比,加入酸性调节液可以大幅提升电流强度,试验后生成了更多的胶凝物质,使黄土强度大幅提升;在距离阴极3.75cm处注入酸性调节液使非饱和黄土的排水效果最好,土体最终承载力最高。

Through the electrochemical consolidation test of loess in Gansu Province,the influence of the same acid regulating fluid on the electrochemical reinforcement of loess under different grouting positions is explored,and its reinforcement mechanism is analyzed.In this paper,the remolded loess soil sample is taken as the research object,and the electrochemical reinforcement method test is carried out with metal electrodes.Through the analysis of the changes of current,drainage and energy consumption in the reinforcement process,as well as the soil moisture content and soil bearing capacity before and after electrochemical reinforcement,the following conclusions are drawn:The electrochemical reinforcement method can effectively promote the drainage of loess moisture,and greatly improve the soil strength;Compared with ordinary electroosmosis method,adding acid regulating liquid can greatly increase the current intensity,and more cementitious substances are generated after the test,which greatly improves the strength of loess;The drainage effect of unsaturated loess is the best and the ultimate bearing capacity of soil is the highest by injecting acid regulating liquid at the distance of 3.75cm from the cathode.