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一、序言当轴向荷重施加于土试样时,例如在无侧限压缩试验时,每级荷重施加后,产生瞬时变形,随着徐变其速度迅速减小,1949年和1950年间哈佛大学为美国水利实验站进行对长时间的荷载下作用于在固定含水量情况下的粘性土及页岩土的强度的研究,作为这项研究工作的一部份尊敬的作者创造了从徐变变形区分突然变形的技术。施加的应力与突然应变之比谓之“瞬时变形模量”(M_i)。对任何土试样,可以发现在破损前各级施加应力下的M_i值接近一常数,同时可以归纳出的结果是M_i值相当近似于杨氏弹性模
I. INTRODUCTION When an axial load is applied to a soil sample, for example, in an unconfined compression test, instantaneous strain occurs after each stage of load is applied, and the rate of rapid collapse as creep progresses, Harvard University between 1949 and 1950. A study of the strength of cohesive soils and shale soils under conditions of fixed water content under long-term loads was conducted for the American Water Conservancy Experiment Station as part of this research work. Respected authors created deformations from creep. Distinguish sudden deformation techniques. The ratio of the applied stress to the sudden strain is referred to as “Modification modulus” (M_i). For any soil sample, it can be found that the value of M_i under applied stress before breakage is close to a constant, and at the same time the generalized result is that the M_i value is quite similar to Young’s modulus of elasticity.