论文部分内容阅读
保持小主应力、中主应力不变,在大主应力方向加荷是实际工程中存在的一种应力路径,就该应力路径分别对不同含水率的重塑黄土进行了几组真三轴试验,对其应力—应变关系及反映侧向变形变化规律的泊松比进行了特定条件下的研究。研究结果表明,应力—应变关系的偏差应力和初始切线模量随含水率的增大而减小,相同的偏差应力下含水率越大侧向应变就越大。在上述应力路径下剪切,中主应力方向首先压缩,但表现不明显,很快就转为膨胀,小主应力方向膨胀,泊松比可以大于0.5,且小主应力方向膨胀量大于中主应力膨胀量。
Maintaining a small main stress, the main stress unchanged, loading in the direction of the main stress is a stress path in the actual project exist, on the stress path of different moisture content of the remolded loess were made of several sets of true triaxial test , The stress-strain relationship and the Poisson’s ratio that reflects the variation of lateral deformation were studied under specific conditions. The results show that the stress-strain relationship and the initial tangent modulus decrease with the increase of water content, and the bigger the water content is, the larger the lateral strain is. In the above stress path, shearing, the direction of the main stress is first compressed, but the performance is not obvious, and soon it turns to expand. The direction of small principal stress expands. Poisson’s ratio can be larger than 0.5, Stress expansion.