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http://dx.doi.org/10.14481/jkges.2022.23.12.5

Estimation on End Vertical Bearing Capacity of Double Steel-Concrete Composite Pile Using Numerical Analysis  

Jeongsoo, Kim (Department of Future and Smart Construction Research, Korea Institute of Civil Engineering and Building Technology)
Jeongmin, Goo (DONG MYEONG Eng. Consultants & Architecture Co., LTD.)
Moonok, Kim (R&D Laboratory, SPEC Engineering Y&P Co., LTD.)
Chungryul, Jeong (Department of Future and Smart Construction Research, Korea Institute of Civil Engineering and Building Technology)
Yunwook, Choo (Department of Civil & Environmental Engineering, Kongju National University)
Publication Information
Journal of the Korean GEO-environmental Society / v.23, no.12, 2022 , pp. 5-15 More about this Journal
Abstract
Conventionally, because evaluation methods of the bearing capacity for double steel pipe-concrete composite pile design have not been established, the conventional vertical bearing capacity equations for steel hollow pile are used. However, there are severe differences between the predictions from these equations, and the most conservative one among vertical bearing capacity predictions are conventionally adopted as a design value. Consequently, the current prediction method for vertical bearing capacity of composite pile prediction composite pile causes design reliability and economical feasibility to be low. This paper investigated mechanical behaviors of a new composite pile, with a cross-section composed of double steel pipes filled with concrete (DSCT), vertical bearing capacities were analyzed for several DSCT pile conditions. Axisymmetric finite element models for DSCT pile and surrounding ground were created and they were used to analyze effects on behaviors of DSCT pile pile by embedding depth, stiffness of plugging material at pile tip, height of plugging material at pile tip, and rockbed material. Additionally, results from conventional design prediction equations for vertical bearing capacity at steel hollow pile tip were compared with that from numerical results, and the use of the conventional equations for steel hollow pile was examined to apply to that for DSCT pile.
Keywords
Composite pile; DSCT (Double-Skinned Composite Tubular) cross-section; Vertical bearing capacity; Pile tip bearing capacity; Comparison of design bearing capacity equation; Numerical analysis;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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