ELUCIDATION OF THE END BEARING CAPACITY OF THE OPEN ENDED PILES

Abstract

 Deep embedded and large diameter steel pipe piles have been popularly used in the port facilities nowadays for supporting large vertical load, because of growing size of port facility or changing structural types. Precise estimation of bearing capacity has been required. Estimation of bearing capacity of large diameter and deep embedded piles complex problems such as bearing capacity increment because of deep embedment and bearing capacity decrement because of decrement of plugging effect by using large diameter piles. In this report, focusing on pile plugging phenomena, pile plugging mechanism was investigated. Open ended model pile penetration experiments were conducted and coefficient of earth pressure inside of the pile was estimated. Then inner friction force distribution was estimated. As a result, inner friction around the toe of the pile is large and it rapidly decreases along with upward of the pile.