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Young-Geun Lee Min-Jun Jang Soon-Jong YoonAbstractIn the construction site, various earth retaining systems are developed and applied to maintain stability of excavated area andstructures. Among the methods, the underground continuous wall and the column-type diaphragm wall methods are especially used in construction site nearby buildings or roads. However, these methods have some disadvantages such as the difficulty of quality control and long curing time because these methods need to cast fresh concrete at the construction site. In addition, these methods are usually applied to the site for the temporary purpose. In this paper, we suggest precast hollow prestressed concrete pile for continuous pile wall system. To investigate the structural behavior of suggested pile, which is the main member of the suggested system, tests pertaining to the structural behavior and prestressing force applied in the pile are conducted. From the test results, it was found that the prestressing force measured is sufficient compared with the value obtained by the design equation and the cracking moment measured is 34% higher than the design value. In addition to the above, this precast hollow prestressed concrete pile has an additional safety margin that the maximum moment is 59.2% higher than the cracking moment which is one of theserviceability limits for the design of the system.Keywords : Permanent retaining wall, Precast pile, Long-line method, Prestessed concrete, Continuous pile wall, Flexural behavior

Evaluation of Flexural Behavior of Hollow Prestressed Concrete Pile for Continuous Pile Wall