Operating Process of Transverse Type Roadheader for Tunnel Excavation in Korea

Min-Gi Cho; Jung-Woo Cho; Mun-Gyu Kim; Jae-Hoon Jeong; Sung-Hyun Choi

doi:10.7474/TUS.2023.33.1.001

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2023 Vol.33, Issue 1 Next Page

Technical Note

Operating Process of Transverse Type Roadheader for Tunnel Excavation in Korea 횡방향 타입 로드헤더의 터널면 절삭공정 고찰

28 February 2023. pp. 1-9

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Abstract

Roadheaders have been operated in the construction of Korean tunneling projects. The note introduces operation manual and management case of transverse type roadhead in a Korean tunneling site. The cutting and reaction forces of axial and transverse type cutting heads were qualitatively analyzed. The shaping surfaces of tunnel faces were visualized in both cases of fixed and auto-controlled telescopic cylinder conditions. Excavating with fixed cylinder, concave surfaces were shaped on tunnel face. The total processes of sumping and shearing were illustrated for excavating hard rock tunneling. The supplementary graphical explanations for total tunneling procedures in Korea were provided.

Keywords

Road header

Transverse type

Tunnel excavation

Operation process

Tunnel face shaping

국내 터널현장에 도입된 드럼타입 로드헤더의 작동방식 및 현장 운영 사례를 소개하였다. 축방향 타입과 횡방향 타입의 작동에 따른 절삭력과 반력의 방향을 분석하였다. 텔레스코픽 실린더의 사용 유무에 따른 터널면 형성의 차이점을 설명하였다. 실린더를 사용하지 않는 경우, 오목한 작은 반경의 터널면이 형성되어 터널면을 좌우로 구분하여 굴진하는 것으로 조사되었다. 그리고 국내 경암 터널 굴착환경에서 썸핑과 쉬어링 공정의 적용방안을 도해적으로 설명하고, 굴착공정에 대한 기존 설명자료를 일부 보완하였다.

키워드

로드헤더

횡방향 타입

터널 굴착

작동 공정

굴착면 형성

References

Chang, S.H., 2015, A Consideration for Mechanical Rock Excavation Focusing on TBM and Roadheader, Journal of the Koreacn Geotechnical Society, 52(5), 531-548. 10.12972/ksmer.2015.52.5.531

Kim, Y.G., 2020, Roadheader Solution in Urban Tunnelling, Journal of the Koreacn Geotechnical Society, 36(2), 6-16.

Kim, Y.G., Jeong, H.Y., Cho, J.W., Park, S.W., Lee, Y.J., Jang, J.S., and Choi. S.H., 2021, Roadheader Excavation Guide in Urban Tunnelling, Cir, Seoul, pp. 7-9.

Middlebrook, T., 2017, The Confederation Line Ottawa LRT Project, ITA Tunnelling Awards 2017, AFTES Congress in Paris, November 13-16.

Park, Y.T., Choi, S.W., Park, J.H., Lee, C.H., and Chang, S.H., 2013, Excavation Mechanism of Roadheader and Statistical Analysis of its Key Design Parameters Based on Database, Tunnel & Underground Space, 23(5), 428-441. 10.7474/TUS.2013.23.5.428

Sandvik, 2016, Operator's Manual, en-US A.001.1 2016-09-21, with permission of Sandvik Suhjun.

Tunneltalk, 2018, Precision roadheader and rockbolting on West Connex, VMT News Release, 20. Dec. 2018, www.tunneltalk.com.

Information

Publisher :Korean Society for Rock Mechanics and Rock Engineering
Publisher(Ko) :한국암반공학회
Journal Title :Tunnel and Underground Space
Journal Title(Ko) :터널과 지하공간
Volume : 33
No :1
Pages :1-9
Received Date : 2022-12-30
Revised Date : 2023-01-25
Accepted Date : 2023-01-25
DOI :https://doi.org/10.7474/TUS.2023.33.1.001

Tunnel and Underground Space ISSN:1225-1275(Print) 2287-1748(Online) 터널과 지하공간

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