Analysis of Pile Behaviors with Friction Resistance of Skin of Steel Pipe Pile in Ground where Settlement is Predicted

Kicheol Lee; Sehee Shin; Haklin Lee; Dongwook Kim

doi:10.7843/kgs.2020.36.11.107

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2020 Vol.36, Issue 11 Preview Page Next Page

Research Article

Analysis of Pile Behaviors with Friction Resistance of Skin of Steel Pipe Pile in Ground where Settlement is Predicted 침하가 예측되는 지반에서 강관말뚝 주면 마찰 저항에 따른 말뚝의 거동 분석

30 November 2020. pp. 107-117

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Abstract

Open-ended steel pipe piles have outside frictional force and inside frictional resistance in which blocked soil acts on the inside of the steel pipe during installation. It is expected that the ultimate load will change depending on the inside and outside resistance. And, if the ground on which the piles were constructed is clay soil, it is predicted that it will have effect on the negative skin friction caused by the ground settlement. Therefore, in this study, the behavior according to the inside and outside resistance characteristics of steel pipe piles was analyzed numerically, and the frictional force distribution, axial load and settlements before and after the occurrence of ground settlement were calculated. As a result of the analysis, the inside frictional resistance had less influence than the outside frictional resistance. However, inside frictional resistance is considered to be one of the important factors considering the effect on the overall pile behavior, and both resistance factors need to be considered in the design process.

Keywords

Inside and outside frictional force

Negative skin friction

Open-ended steel pipe pile

Settlement

개단 강관말뚝의 경우 일반적으로 말뚝에 작용하는 외부 주면 마찰력뿐만 아니라 설치과정에서 폐색된 흙이 강관 내부에 작용하는 내부 마찰저항이 존재한다. 내·외부 저항에 따라 극한하중의 변화가 예상되며, 말뚝이 시공된 지반이 점성토일 경우 지반 침하로 유발되는 부주면 마찰력에도 영향을 끼칠 것으로 판단된다. 따라서 본 연구에서는 강관말뚝 내·외부 저항 특성에 따른 거동을 수치해석적으로 분석하고자 하며, 지반 침하 발생 전·후의 마찰력 분포, 축력, 침하량을 산정하였다. 해석 결과, 내부 마찰 저항은 외부 마찰 저항보다 적은 영향을 미쳤지만 전체적인 말뚝 거동에 끼치는 영향을 고려하였을 때, 중요한 요소 중 하나이며 설계 시 두 가지 저항요소를 고려할 필요가 있을 것으로 판단된다.

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Information

Publisher :The Korean Geotechnical Society
Publisher(Ko) :한국지반공학회
Journal Title :Journal of the Korean Geotechnical Society
Journal Title(Ko) :한국지반공학회 논문집
Volume : 36
No :11
Pages :107-117
Received Date : 2020-10-13
Revised Date : 2020-10-30
Accepted Date : 2020-11-05
DOI :https://doi.org/10.7843/kgs.2020.36.11.107

Journal of the Korean Geotechnical Society ISSN:1229-2427(Print) 2288-646X(Online) 한국지반공학회 논문집

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