주열식 흙막이 벽체에 적용되는 CFT Pile의 휨성능평가

Evaluation of Flexural Performance of CFT Pile in Continuous Pile Retaining Wall Applications

This study introduces a developed method that uses medium or small machinery called PRS Deque, which addresses the limitations of existing permanent retaining wall techniques that rely on large machinery. The PRS Deque method offers the advantage of being applicable to narrow construction sites while also reducing both the construction period and cost. It employs a continuous pile retaining wall approach, utilizing a combination of circular RC Pile and CFT-type Deque Pile. These piles are designed to exhibit similar deformation performance under service loads and are geometrically coupled. By utilizing a high-rigid Deque Pile, the PRS Deque method enables the construction of a high-performance retaining wall. Additionally, this method ensures the wall's verticality and waterproof capabilities, serving as a secondary guide. To establish a stable design approach for the Deque Pile, this study manufactured five specimens with varying variables such as the flange width thickness ratio and pile size. Through a 4-Point bending test, all specimens demonstrated superior flexural performance, surpassing a design flexural strength of 1.1 or more.