土体强度与含水率及密实度的关系研究

Study on the Relations between Soil Intensity and Density of Different Water Content Conditions

为了探索土在不同含水率条件,特别是在高含水率情况下,土的强度与密实度的关系,取两种黏土进行无侧限压缩试验。试验结果表明:在低含水率(小于土的塑限)条件下,土的强度随着密实度的增加而不断提高;在高含水率(大于等于土的塑限)条件下,土的强度会出现一个与某一临界密实度(密实度大约为0.90～0.95)相应的峰值,土粒越细其临界密实度越小。因此,建议在实际工程施工过程中,要严格控制填筑土料的含水率;在高含水率环境下施工,填筑土料的压实度以临界密实度为宜。

In order to explore the relations between the intensity and density of soil in different water content conditions, particularly in high-moisture conditions, so goes the following test of two kinds of clay soil. After experimentize unconfined compressive strength test, the results showed： in low moisture conditions （less than the plastic limit）, soil intensity increases along with the density continuously improving. In high moisture conditions （ greater than or equal to the plastic limit）, the intensity of soil will happen with a critical density （ the density usually about 0.90 -0.95 ） corresponding to the peak, much finer the soil, much lower the critical density. So in the actual project construction process, the proposal is to strictly control the moisture of the filling soil. In high moisture environment construction, it is advisable to control the proposed reclamation soil compactness around the critical density.