...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Fresenius environmental bulletin >EFFECT OF MATRIC SUCTION ON STRENGTH CHARACTERISTICS OF UNDISTURBED UNSATURATED SILTY CLAY
【24h】

EFFECT OF MATRIC SUCTION ON STRENGTH CHARACTERISTICS OF UNDISTURBED UNSATURATED SILTY CLAY

机译：抽吸作用对未饱和粉质黏土强度特性的影响

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

To study the influence of matric suction on the strength characteristics of soil, consolidated and drained triaxial shear tests on undisturbed silty clay were conducted using GDS unsaturated soil triaxial apparatus under different matric suction conditions. The results show that the peak strength of soil increases with the increase of matric suction, and the rate of increase increases first and then decreases. With increased matric suction, the total cohesion increases and the extent of this increase gradually decreases, while the effective internal friction angle decreases slightly and then tends to be stable. The effect of matric suction on shear strength is mainly reflected in the total cohesion. Matric suction has the most significant influence on soil strength at 50 kPa to 100 kPa. In the presence of matric suction, the area of action of water film on soil particles determines the change of total cohesion, and the pore air pressure and pore water determine the change in effective internal friction angle. The angle used to describe the increase in the shear strength of soil with an increase in matric suction is Φ~b = 28.2 . According to Fredlund's strength theory, the formula of shear strength parameters of unsaturated silty clay in the study area under consolidation and drainage conditions was given, and the relationship between strength parameters and matric suction was fitted.
机译：为了研究基质吸力对土壤强度特性的影响，在不同基质吸力条件下，采用GDS非饱和土三轴仪对固结粉质黏土进行了固结排水三轴剪切试验。结果表明，土壤峰值强度随基质吸力的增加而增加，其增加速率先增加后减小。随着基质吸力的增加，总内聚力增加，并且其增加程度逐渐减小，而有效内摩擦角则略有减小，然后趋于稳定。基质吸力对剪切强度的影响主要体现在总内聚力上。在50 kPa至100 kPa的压力下，基质吸力对土壤强度的影响最大。在存在基质吸力的情况下，水膜对土壤颗粒的作用面积决定了总内聚力的变化，而孔隙气压和孔隙水决定了有效内摩擦角的变化。用于描述随着基质吸力的增加而增加的土壤抗剪强度的角度为Φ〜b = 28.2。根据Fredlund的强度理论，给出了固结排水条件下研究区非饱和粉质黏土的剪切强度参数公式，拟合了强度参数与基体吸力的关系。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号