李雷,荣卫东. 几种击实土挠曲极限拉应变的试验研究[J]. 水利水运工程学报, 2000, (1).
引用本文: 李雷,荣卫东. 几种击实土挠曲极限拉应变的试验研究[J]. 水利水运工程学报, 2000, (1).
LI Lei,RONG Wei-dong. Experimental study on limit tensile strain under bending of compacted soil[J]. Hydro-Science and Engineering, 2000, (1).
Citation: LI Lei,RONG Wei-dong. Experimental study on limit tensile strain under bending of compacted soil[J]. Hydro-Science and Engineering, 2000, (1).

几种击实土挠曲极限拉应变的试验研究

Experimental study on limit tensile strain under bending of compacted soil

  • 摘要: 利用应变控制式土梁挠曲仪 ,对东北黑土、西北黄土、华南红土等几种粘性土的 2 0 0多组试验土样进行了土梁极限拉应变试验 .划分了土梁挠曲试验应变特征的四个阶段 ,以及确定极限拉应变的方法 ,讨论了土的竖向挠曲变形速率、含水量和干重度对极限拉应变的影响 ,指出在试验控制条件下 ,极限拉应的变化范围在 1‰~ 3‰之间 .

     

    Abstract: On the basis of the research on the behavior of tensile strain stress relationship of compacted soil in the past few decades, a new strain controlled soil beam bending instrument was invented,and more than 200 compacted soil samples including loess soil from northwest, black soil from northeast, red soil from southwest of China were tested by the new device. Through the experimental study on the compacted soil sample, the strain process of the soil sample is divided into four phases and the method to gain the limit value of tensile strain under bending was given in this paper.The effect of strain rate, the water content and the dry unit weight are also considered,besides, the range of the limit value of tensile strain under bending is obtained in the paper.

     

/

返回文章
返回