BEHAVIOR OF A SHALLOW PLATE ANCHOR IN CLAY UNDER SUSTAINED LOADING

Laboratory model test results for the uplift of a shallow circular pla te anchor embedded in a soft saturated clay are presented For all test s the bottom of the anchor plate was vented to eliminate the mud sucti on force. The tests were divided into two categories: (1) short-term t ests to determine the variation of the net ultimate uplift capacity an d hence the breakout factor with embedment ratio, and (2) creep tests with sustained uplift loads at varying embedment ratios. Based on the model test results, the variation with time, has been determined for t he rate of strain of the soil located above the plate anchor. Empirica l relationships for obtaining the rate of anchor uplift have been prop osed.