论文部分内容阅读
采用SLB-1型应力应变三轴仪,对正融土进行了无侧限抗压试验,研究了冻前含水率、顶端冷却温度和顶端融化温度对土样的应力应变和强度特性的影响。试验结果表明:①在相同顶端冷却温度和相同顶端融化温度下,最优含水率下制备的土样具有最高的强度,且正融土样破坏时的强度和冻前含水率之间的关系可以用高次多项式来描述;②在相同冻前含水率和相同顶端融化温度下,土样破坏时的强度随顶端冷却温度的降低而增大,破坏时的应变也增加;③在相同顶端冷却温度下,高含水率土样在较大的应变下出现破坏;低含水率土样在较小的应变下出现破坏;④文中给出的正融土样的无侧限抗压应力应变关系表达式和试验数据吻合很好,可以在实际工程中加以推广应用。
Using SLB-1 stress-strain triaxial apparatus, unconfined compressive tests were carried out on the as-thawed soil to study the effects of water content before freezing, top cooling temperature and top melting temperature on stress-strain and strength properties of soil samples. The results show that: (1) at the same tip cooling temperature and the same tip melting temperature, the soil samples prepared at the optimum moisture content have the highest strength, and the relationship between the strength at the time of normal thawing and the water content before freezing can be (2) At the same water content and the same melting temperature at the same point, the strength of the soil specimen increases with the decrease of the cooling temperature at the top and the strain at the time of failure also increases. (3) At the same top cooling temperature , The soil samples with high water content were damaged under larger strain; the soil samples with low water content were destroyed under smaller strain; ④ The unconfined compressive stress-strain relationship And experimental data are in good agreement, which can be popularized and applied in practical engineering.