Study on selection and basic specifications design of shield TBM for power cable tunnels

Jung Joo Kim; Ji Yun Lee; Hee Hwan Ryu; Ju Hwan Jung; Suk Jae Lee; Du San Bae

doi:10.9711/KTAJ.2023.25.3.201

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2023 Vol.25, Issue 3 Preview Page Next Page

Research Paper

Study on selection and basic specifications design of shield TBM for power cable tunnels 터널식 전력구 쉴드TBM 선정 및 기본설계 사양 제시에 관한 연구

31 May 2023. pp. 201-220

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Abstract

Power cable tunnels is one of the underground structures meant for electricity transmission and are constructed using shield TBM method when transitting across urban and subsea regions. With the increasing shaft depth for tunnels excavation when the shield TBM excavated the rock mass, the review of selecting closed-type shield TBM in rocks becomes necessary. A simplified shield TBM design method is also necessary based on conventional geotechnical survey results. In this respect, design method and related design program are developed based on combined results of full-scale tests, considerable amount of accumulated TBM data, and numerical simulation results. In order to validate the program results, excavation data of a completed power cable tunnel project are utilized. Thrust force, torque, and power of shield TBM specification are validated using Kernel density concept which estimates the population data. The robustness of design expertise is established through this research which will help in stable provision of electricity supply.

Keywords

Power cable tunnel

Shield TBM

Design program

TBM excavation data

Population data estimation

터널식 전력구는 지중으로 전력을 공급하기 위한 구조물 중 하나이며, 도심지 및 해저구간을 통과하는 구간에 쉴드TBM 공법을 활용하여 안정적으로 건설을 추진한다. 전력구 건설의 경우에는 수직구 심도가 깊어 주로 암반지반을 굴착하며, 암반대상 밀폐형 쉴드TBM 선정에 대한 고찰이 필요하였다. 또한, 지반조사 보고서 결과를 바탕으로 범용적이고, 간단한 설계방법이 필요하였다. 이에 실대형 굴진시험, 누적 굴진데이터, 수치해석을 종합하여 쉴드TBM 설계방법과 관련 프로그램을 개발하였다. 프로그램 결과에 대해 검증을 수행하고자 준공된 전력구 1개 현장의 굴진데이터를 활용하였다. 굴진데이터의 모집단을 추정하기 위해 커널밀도추정 방법을 도입하여 추력, 토크, 동력의 기본사양에 대해 검증을 완료하였다. 본 연구결과를 통해 쉴드TBM 설계업무 전문성 강화 및 안정적 전력공급의 사용자 편익증대를 기대할 수 있다.

키워드

터널식 전력구

쉴드TBM

설계 프로그램

TBM 굴진데이터

모집단 추정

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Information

Publisher :Korean Tunneling and Underground Space Association
Publisher(Ko) :한국터널지하공간학회
Journal Title :Journal of Korean Tunnelling and Underground Space Association
Journal Title(Ko) :한국터널지하공간학회 논문집
Volume : 25
No :3
Pages :201-220
Received Date : 2023-04-03
Revised Date : 2023-05-04
Accepted Date : 2023-05-18
DOI :https://doi.org/10.9711/KTAJ.2023.25.3.201

Journal of Korean Tunnelling and Underground Space Association ISSN:2233-8292(Print) 2287-4747(Online) 한국터널지하공간학회 논문집

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