弹性波速反映黄土加固凝聚力变化的试验研究

EXPERIMENTAL STUDY ON LOESS REINFORCED COHESION BY ELASTIC WAVE VELOCITY

摘要:

试验中运用骨架波速和黄土加固凝聚力的概念,将饱和度的增加引起土体密度的增加对波速的影响与水破坏加固凝聚力对波速的影响区分开来;在相似的压力和饱和度条件下采用动力作用前后分别测试弹性波速的方法,将动力荷载对加固凝聚力的破坏作用与土样自身的颗粒组分对波速的影响区分开来。初步研究了水及动力作用对黄土加固凝聚力的破坏及黄土波速的变化规律。

Abstract:

Based on the concepts of elastic wave velocity of skeleton and reinforced cohesion, the change of velocity resulting from the variation of soil density with the different saturation is distinguished from that caused weakened reinforced cohesion. In the condition of the same confined press and saturation, the elastic wave velocities are measured before and after soil samples are dynamically loaded, so that the elastic wave velocity changed by dynamic load is distinguished from that by soil nature characteristics. Some regular patterns of reinforced cohesion and velocity in loess under different saturation and dynamic load are discussed in a preliminary way.