Abstract
Change in undrained shear strengths su due to swelling under K0 and isotropic stress conditions were investigated for three saturated remolded clays. Test results indicate that the relationship between the ratio su/p, where p is the vertical effective stress at the end of swelling, and the overconsolidation ratio n is represented by a straight line in logarithmic plot. Moreover, the slope of this line is almost the same for both K0 and isotropic stress conditions, and its value is closely approximate to that of (1-Cs/Cc), where Cc and Cs are compression and swelling indices, respectively.Based on the test results, the authors proposed a simple method of estimating the in situ undrained shear strength su for overconsolidated clays from a series of conventional laboratory test.Furthermore, the coefficient of earth pressure at rest K0 and the pore pressure coefficient A at failure were discussed in relation to overconsolidation ratio n.
