不同黏粒含量对花岗岩残积土渗透性影响

开展不同黏粒含量对花岗岩残积土渗透性影响的试验研究,揭示花岗岩残积土中黏粒含量对其渗透系数的影响趋势,为花岗岩残积土的工程实践提供理论依据。以广西贵隆高速项目为依托,选取广西宾阳地区典型的花岗岩残积土,加入一定量的黏土,进行标准击实试验,测定不同黏粒含量条件下、标准击实后土样的渗透系数。结果分析表明：花岗岩残积土中的不同黏粒含量对其渗透性影响区别较大,黏粒含量的增加导致了渗透系数的降低；花岗岩残积土的渗透系数随着含水率的增大而逐渐减小；红黏土中的高岭石是影响花岗岩残积土渗透性的主要黏粒成分。

Study on the effect of different clay content on the permeability of granite residual soil

The experimental study on the effect of different clay content on the permeability of the residual soil of the granite reveals the influence of the clay particle on the permeability coefficient of the residual soil of the granite, and provides the theoretical basis for the engineering practice of the granite residual soil. The typical granite residual soil in Binyang area of Guangxi is selected, a certain amount of clay is added, and the standard compaction test is carried out to determine the permeability coefficient of the soil sample after the standard compaction test. The results show that the permeability of the clay content to the residual soil of the granite is great, the total permeability coefficient is decreased with the increase of the content of the clay, and the permeability coefficient of the residual soil of the granite gradually decreases with the increase of the water content; Kaolinite in red clay is the main clay component which affects the permeability of granite residual soil.