一、粘性土填料的选择粘性土作为铁路路基的填料,使用最为广泛。由于粘性土颗粒具有非常复杂的胶体粒团特性,其性质取决于粘土颗粒中含有高岭土、伊利土和蒙脱土的矿物成份的多少,不同粘性土对水、温度和气侯有不同程度的物理化学变化。高岭土水稳性好,力学性质也好;蒙脱土水稳性最差,力学性质也最差;伊利土介于两者之间。因此,若粘性土中含有较多的蒙脱土 First, the choice of cohesive soil filler Cohesive soil as a railway subgrade filler, the most widely used. Because of the very complex colloidal particle characteristics of cohesive soil particles, its nature depends on the clay particles contain kaolin, Erlitou and montmorillonite mineral composition, different cohesive soil water, temperature and climate have varying degrees of physicochemical Variety. Kaolin water-stable, good mechanical properties; montmorillonite water stability is the worst, the worst mechanical properties; Erie soil between the two. Therefore, if the clay contains more montmorillonite