| "This paper describes how to draft a formula for estimating the side resistance of a pile by reviewing a great number of in situ pile loading tests conducted in the past. This will improve the formula used in the current Specifications, which is considered to be an overestimation. Furthermore, the magnitude of safety margin excluding the safety factor of the current Specifications is also unclear. The reliabilities of two SPT-N values normalized unit side resistances in each layer are examined: (1) fy /N at the yield point of a Po-So curve and (2) fp /N at the peak side resistance, by using the reliability index, β. The results show that fy /N has higher reliability than fp /N." |
