抄録
The present paper is the part of a series of study to find out a simple engineering method of performing the reliability-based design of an embankment constructed on a poor clay layer. For the purpose, it is necessary to make the accurate charts and simple equations to obtain the central safety factor and the probability of failure. The discussion from such a viewpoint is carried out associated with a method of improvement of a clay layer by sand compaction piles and some numerical examples of its optimization are shown in order to verify the usefulness of the simple engineering method. The charts to determine the location of a slip circle and the probability of failure are not involved in this paper since the same charts previously published in another paper (Matsuo and suzuki, 1983) are also used in the present study.
