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本文就粘性填土单轴抗拉强度的几个影响因素:循环加卸荷载、干容重与含水量、加荷速率进行了试验研究。1.试验发现循环加卸荷载对填土单轴抗拉强度值没有什么影响,不会出现“疲劳极限”。但却明显地表现出非线性的应力-应变关系。破坏的应变值较大。文中还叙述了循环加卸荷载作用下的应变特点。2.含水量与干容重对单轴抗拉强度的影响显著。试验得出,在略小于最优含水量时出现最大抗拉强度值。3.加荷速率不同,单轴抗拉强度值也不同。
In this paper, several factors influencing the uniaxial tensile strength of cohesive backfill, such as cyclic loading and unloading load, dry bulk density and water content, and loading rate, are studied experimentally. 1. The test found that the cyclic loading and unloading had no effect on the uniaxial tensile strength of the filling and no “fatigue limit” would occur. However, the nonlinear stress-strain relationship is clearly exhibited. Destruction of the larger value of the strain. The text also describes the strain characteristics under cyclic loading and unloading. 2. The influence of water content and dry bulk density on uniaxial tensile strength is significant. The test shows that the maximum tensile strength appears at slightly less than the optimum moisture content. 3. Different loading rates, uniaxial tensile strength values are also different.