Evaluation of Ground Deformation during Excavation of Vertical Shaft through Centrifuge Model Test

Joonyoung Kim

doi:10.7843/kgs.2022.38.1.35

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2022 Vol.38, Issue 1 Preview Page

Evaluation of Ground Deformation during Excavation of Vertical Shaft through Centrifuge Model Test 원심모형실험을 통한 원형 수직구 굴착 중 발생하는 지반 변형 평가

31 January 2022. pp. 35-45

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Abstract

When constructing a cylindrical vertical shaft through the open-cut method, the walls are generally designed to be temporary flexible walls that allow a certain level of displacement. The earth pressure applied to the flexible walls acts as an external force and its accurate estimation is essential for reasonable and economical structure design. The earth pressure applied to the flexible wall is closely interrelated to the plastic deformation of the surrounding ground. This study simulated a stepwise excavation for constructing a cylindrical vertical shaft through a centrifugal model test and evaluated the continuous deformation behaviors of the surrounding ground through digital image analysis.

Keywords

Centrifugal model test

Digital image analysis

Excavation

Vertical shaft

개착공법으로 원형 수직구 건설 시, 가시설 흙막이 벽체는 일정 수준의 변위를 허용하는 연성벽체로 설계된다. 합리적이고 경제적인 연성벽체의 구조 설계를 위해서는 벽체에 작용하는 토압을 정확히 평가할 필요가 있다. 원형 수직구 벽체에 작용하는 토압은 주변 지반의 소성 변형과 밀접하게 연관되어 있으나, 이에 대한 연구는 부족한 상황이다. 본 연구는 원형 수직구의 단계 굴착을 원심모형시험을 통해 모사하고, 원심모형시험 중 촬영된 이미지에 이미지 해석 기법을 적용하여 원형 수직구 굴착 시 주변 지반에 발생하는 변형을 평가하였다.

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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 : 38
No :1
Pages :35-45
Received Date : 2021-12-20
Revised Date : 2021-12-29
Accepted Date : 2021-12-30
DOI :https://doi.org/10.7843/kgs.2022.38.1.35

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

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