Abstract
High load bearing capacity bored piling is a method that let achieve a large vertical bearing capacity by increasing the tip diameter and length of the pile. Therefore, in order to ensure the highest possible level of the bearing capacity, foot protection is important. While this method has remarkably improved the strength of foot protection, some problems related to execution still exist. Furthermore, although the bearing capacity of various piles developed by different pile manufacturers has been confirmed, such validation does not cover all grounds. In order to ensure a high-quality of construction, this report presents, based on grounds investigation, laboratory mixing tests, and pre-construction tests, a method for achieving higher execution as well as three quality assurance examples.
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