硅酸钾溶液对黏性土体微观结构的影响研究

Study on the Influence of Potassium Silicate Solution on the Microstructure of Clayey Soil

为更好满足工程中的要求,土的改良成为一道重要工序,改良后的土体其抗剪强度及液塑限都会产生变化。在黏性土中加入硅酸钾溶液,进行改良,研究其抗剪强度以及液塑限的变化。对改良后的试样进行了快剪直剪试验和土体液塑限试验,探讨了硅酸钾溶液改良土的抗剪强度及其液限塑限的变化规律。进行电子扫描试验得到不同土体试样的微观结构图,并利用Image-Pro Plus图像处理软件计算含不同硅酸钾溶液浓度的改良土样的微观参数,解释其内在机理。

In order to better meet the requirements of engineering,soil improvement has become an important process,and the shear strength and liquid-plastic limit of the improved soil will change.The change of shear strength and liquid-plastic limit of viscous soil was studied by adding potassium silicate solution to improve the soil.The quick and straight shear test and liquid-plastic limit test of soil were carried out on the improved sample,and the change of the shear strength and plastic limit of the modified soil with potassium silicate solution was discussed.The micro-structure maps of different soil samples were obtained by scanning electron microscope test,and the micro-parameters of improved soil samples containing different potassium silicate solution concentrations were calculated by Image-Pro Plus Image processing software to explain their internal mechanism.