探讨水玻璃和硫酸铝治理高液限土路基的可行性

Discussion on the Feasibility of Using Sodium Silicate and Aluminum Sulfate to Treat High Liquid Limit Soil Subgrade

本文通过研究高液限土路基病害中应用水玻璃、硫酸铝的可行性,获得了以下结论:(1)对高液限粘土病害使用水玻璃和硫酸铝可降低液限,塑限增加,塑性指数下降;(2)与未处理的土壤相比,改良后土壤中的黏粒含量减少,但粉土和粗粒含量中却有明显的提高;(3)与未处理土壤相比,改良后土壤的相对膨胀率较低;(4)在干湿循环同等次数条件下,与未处理土壤相比,改良后土壤内摩擦角、粘聚力得到了较大提升;(5)经过三次干循环与湿循环后,未处理的土壤的承载率达不到规定的标准,但其改良后的土壤CBR(含4%的水玻璃溶液和0.4%的硫酸铝)可达到规定标准。

By studying the feasibility of using sodium silicate and aluminum sulfate in high liquid limit soil subgrade diseases,the following conclusions are obtained:1)using sodium silicate and aluminum sulfate for high liquid limit clay diseases can reduce the liquid limit,increase the plastic limit and decrease the plastic index;2)Compared with the untreated soil,the clay content in the improved soil decreased,but the silt and coarse grain content increased significantly;3)Compared with the untreated soil,the relative expansion rate of the improved soil was lower;4)Compared with untreated soil,the internal friction angle and cohesion of improved soil were greatly improved under the same number of dry wet cycles;5)After three dry and wet cycles,the bearing rate of untreated soil can not reach the specified standard,but the improved soil CBR(containing 4%sodium silicate solution and 0.4%aluminum sulfate)can reach the specified standard.