含盐冻结粉质粘土单轴抗压强度试验研究

详细信息

UNIAXIAL COMPRESSIVE STRENGTH OF FROZEN SALINE SILTY CLAY

State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000, China

摘要: 通过对饱和含盐冻结粉质粘土单轴抗压强度试验,得到了试验条件下土体的单轴抗压强度与含盐量、负温的关系;讨论了应变速率一定,温度和含盐量变化时,含盐冻结粉质粘土的屈服应力和抗压强度间的关系;提出了相对温度这一新概念,并给出抗压强度与相对温度间的线性关系。相对温度的引入建立了盐渍土和非盐渍土力学性质的关系,从而可以用非盐渍土力学性质预测盐渍土的力学性质。
- 盐渍土 /
- 抗压强度 /
- 粉质粘土 /
- 屈服应力 /
- 应变速率
Abstract: A series of uniaxial compressive strength tests were conducted on frozen saline silty clay.The test results show that: within the test range condition,the compressive strength decreases linearly with increasing salt content and descending test negative temperature.For a certain strain rate,the yielding strength is closely related to the compressive strength with the variation of temperature and salinity.The concept of relative temperature is proposed,and a linear relationship between the relative temperature and the compressive strength at different test temperature and salinity is presented.The relative temperature can be used to link the mechanical properties of non-saline soil with those of saline soil.
- saline soil /
- compressive strength /
- silty clay /
- yielding strength /
- strain rate