Study on Asymmetric Settlement Trough induced by the 2nd Tunneling of Twin Shield Tunnels in Clay

Chang-Yoon Ahn; Duhee Park

doi:10.7843/kgs.2021.37.10.55

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2021 Vol.37, Issue 10 Preview Page Next Page

Study on Asymmetric Settlement Trough induced by the 2^nd Tunneling of Twin Shield Tunnels in Clay 점토지반 병설쉴드터널에서 후행터널 굴착에 의한 비대칭 침하형상 연구

31 October 2021. pp. 55-63

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Abstract

The construction of shield tunnels is being expanded from the small-bore tunnels such as power, telecommunications, water supply, and sewerage pipes to the large bore tunnels such as road and railway tunnels with the advancement of the shield TBM (Tunnel Boring Machine) manufacturing technology. Accordingly, the construction of twin shield tunnels is increasing. Peck (1969) reported that the surface settlement trough is well described by a Gaussian distribution on a single shield tunnel. Hereafter, many studies about the surface settlement trough were performed by the field measurement, laboratory model test, and numerical analysis. This study confirmed that the additional surface settlement trough induced by the 2^nd tunneling were well described by using each Gaussian curve for the right and left sides of the settlement trough.

Keywords

2^nd tunneling

Asymmetric

Settlement trough

Twin shield tunnels

쉴드TBM의 제작기술 발전과 시공경험 축적으로, 쉴드터널은 전력, 통신 및 상하수도와 같은 소구경 터널에서 도로 및 철도와 같은 대구경 터널로 확대되고 있으며, 그에 따라 병설쉴드터널의 적용도 증가하고 있다. Peck(1969)에 의해 연약지반에서 단선쉴드터널의 지표침하형상이 Gaussian distribution으로 표현될 수 있음이 제시된 이후, 현장계측, 실내모형실험 및 수치해석 등의 방법을 통해 많은 연구에서 이의 적정성이 확인되었다. 본 연구는 현장 계측된 병설쉴드터널의 지표침하로부터 후행 터널(2^nd tunnel)에 의한 추가 지표침하 형상을 표현하기 위해 침하형상의 좌·우측에 Gaussian curve를 각각 적용함으로써, 침하형상을 보다 정확히 표현할 수 있음을 알 수 있었다.

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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 : 37
No :10
Pages :55-63
Received Date : 2021-09-06
Revised Date : 2021-10-19
Accepted Date : 2021-10-19
DOI :https://doi.org/10.7843/kgs.2021.37.10.55

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

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