ชัชวาลย์ พูนลาภพานิชพลวิท บัวศรี2555-05-272555-05-272555-05-27http://dspace.spu.ac.th/handle/123456789/3596This paper presents the comparison of dry-process bored pile capacities from static pile load test with the allowable pile capacities calculated from the friction resistance specified by Bangkok Building Codes. The study estimates the ultimate pile capacities using Mazurkiewicz’s method based on 42 static pile load test data of bored piles 0.50 and 0.60 m. diameters which were constructed in central Bangkok area. The comparison indicates that the average factor of safety is 2.26 and the minimum factor of safety is 1.7. The percentage of piles which have factor of safety below 2.0 is 17. This paper also presents a reduction factor equation for estimating the allowable capacity of dry-process bored piles having 19-25 m. pile length.น้ำหนักบรรทุกเสาเข็มเจาะแห้งBored pilesDry processFoundationPile capacityPile foundationStatic pile load testArticle