K_0固结软土不排水抗剪强度

Undrained shear strength of K_0 consolidated soft clays

从临界状态土力学出发,考虑K0固结引起的诱发各向异性,推导了K0固结条件下三轴压缩和三轴拉伸不排水强度的理论计算公式。搜集对比现有的试验结果,发现本文提出的理论公式与国内外试验及失稳软基堤坝反分析结果更为符合,在大量土性分析基础上提出平均不排水强度的简化计算公式,以兹工程推广与应用。

Based on the researches of the other scholars and the critical state soil mechanics, theoretical formulas of the undrained strength under K0 compression and extension stress condition were derived with consideration of induced anisotropy. After collecting contrasting the existing test results, it was found that the results abtained with theoretical formulas proposed in this paper agreed with the test results and back analysis of failured dams. Based on a large number of investigations, a simple formula for calculating the mean undrained Strength was proposed, and it the method could be popularized for engineering application.