THE REQUIRED COMPRESSIVE STRENGTH OF SOIL-CEMENT IN ENLARGED BASE OF BORED PILES TO ENSURE THE BEARING CAPACITY OF THE PILE

Abstract

The vertical bearing capacity of bored piles is examined by 4 full scale pile loading tests varying the strength of soil-cement in the enlarged base. Based on 3 failure patterns of the enlarged base, the end bearing capacity is estimated by the soil SPT values and the unconfined compressive strength of the soil-cement. The pile loading tests show that the relation between the strength of soil-cement and pile bearing capacity agrees well to the proposed failure condition by the simple analytical model.