基于低黏土矿物含量泥岩的膨胀力试验研究

针对某高速铁路地基中低黏土矿物泥岩进行不同初始含水率与不同干密度条件下的膨胀力试验,结果表明:规范中判定为无膨胀性的泥岩实质上是具有一定的膨胀性;在干密度不变的条件下,膨胀力随着初始含水率的增大而减小;在初始含水率不变的条件下,膨胀力随着干密度的增大而增大。并且根据试验结果拟合出适用于低黏土矿物泥岩的考虑干密度与初始含水率的膨胀力公式。

MUDSTONE IN DIFFERENT LOW CONTENT OF CLAY OVERBURDEN LOAD TEST THE LIMITS OF THE EXPANSION

In this paper, a high-speed railway in the low ground clay minerals mudstone different initial moisture content and expansion force dry density test under different conditions, the results showed that: the specification is determined that no expansion of the shale is essentially a certain expansion; under the same conditions dry density, the expansion force with increasing initial water content decreases; in the initial moisture content of the same conditions, the expansion force along with the dry density increases. And expansive force fitted formula for low clay mineral consideration shale dry density and initial water content of the test results.