• Journal of Korean Tunnelling and Underground Space Association
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• v.24 no.1
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• pp.15-38
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• 2022

Recently, tunnel technology in Korea has shown various achievements such as long tunnel and large section by tunnel construction using TBM in Korea and abroad. Especially subsea tunnels are frequently designed and constructed. The Ga-deok subsea tunnel was completed in December 2010, and the Incheon North Port Tunnel was opened and operated in 2017, and the Bo-ryeong subsea tunnel between Dae-cheon Port and Won-san Island will be completed in 2021. In foreign countries, many subsea tunnels have been constructed and operated in such as Norway and Japan. The main technical problem in the construction of subsea tunnel is to secure stability due to high water pressure conditions and large-scale seawater inflow in fault zones and weak zones. In this paper, various risk factors and solutions are described in the subsea tunnel planning of national road 77 construction work between Abhae and Hwawon.

• Geotechnical Engineering
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• v.37 no.2
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• pp.10-17
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• 2021

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.22 no.3
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• pp.209-215
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• 2004

Together with the requirements of tunnels, its construction methods and technologies have been pretty much developed, but frequent accidents happened under the constructions are just one of important problems which should be improved. To detect the potential hazardous factors in or ahead of time, speedy and accurate observation are absolutely required, but currently surveying method using tapes, level and total station, has been generally taken in measuring of tunnel convergence and crown. The purpose of this study is, as using of industrial photogrammetry system which is supplying more accuracy and speedy in the measure of tunnel convergence and crown. From the result of this study, we have got up to 1/20,000 accuracy and totally 6 minutes, from picturing 5 sections by one person to data edition, has been taken except setting targets.

• Journal of the Korea institute for structural maintenance and inspection
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• v.7 no.3
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• pp.115-124
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• 2003

In this study, the relationships between the displacement and stress of the tunnel using various analysis methods were compared with monitoring results carried out during construction and maintenance monitoring. The behavior of tunnel were measured in the subway tunnel passing comparative soft the weathering and analyzed both security and mechanical characteristics of the tunnel lining. With the results of simplified monitoring observed in top heading and bench excavation tunnel, it is confirmed that the crown settlement is larger than the surface settlement. it is interesting to note that the crown settlement and the crown shotcrete lining stress are widely used monitoring items for the back analysis. It is analyzed that the residual water pressure applied in the drainage type tunnel is reasonable.

• Tunnel and Underground Space
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• v.17 no.2 s.67
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• pp.152-164
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• 2007

Recently as increasing the amounts of cargoes and passengers, it is necessary to improving railway capacity and speed. So the constructions of improving the existing railway line have been advanced. Sometimes the new railway tunnel is built to adjacent the existing railway line. Furthermore the new tunnel might be built near the existing facility within the tunnel width. In this case, it should be analyzed the influence of existing tunnel and if it is necessary, it should be taken the appropriate counterplan. The major analysis contents are follows. One is the influence on the existing tunnel by a blasting and train vibration and the other is stability problem of the existing tunnel by excavation of new tunnel. Therefore, we peformed the following analysis. Refer to a domestic and foreign standard and paper, the permitting level of blasting vibration is decided and the excavation plan of the new tunnel are designed. The numerical analysis is performed about the stability of the existing tunnel and new tunnel. The influence of the train vibration on tunnel is analyzed by the empirical equation.

• Magazine of korean Tunnelling and Underground Space Association
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• v.17 no.2
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• pp.119-129
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• 2015

• Magazine of korean Tunnelling and Underground Space Association
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• v.12 no.2
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• pp.31-46
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• 2010

• Magazine of korean Tunnelling and Underground Space Association
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• v.12 no.3
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• pp.65-73
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• 2010

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.30 no.7
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• pp.19-23
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• 2001

장대터널내 환기설비의 단계적인 건설방안에 관하여 한국도로공사와 한국건설기술연구원이 함께 수행한 연구내용을 소개하고, 또한 현재 적용되고 있는 방재설비의 설계흐름과 컴퓨터 시뮬레이션을 이용한 제연설비의 설계경향에 대하여 간단히 소개하고자 한다.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.40 no.1
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• pp.97-103
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• 2020

The newly improved multistep steel pipe grouting method was applied to an existing steel pipe-reinforced grouting method. It was applied in order to prevent a damage caused by ground failure from excessive grouting pressure in a tunnel construction. The tunnel goes under a highway and a ramp connected to a rest area on OO highway with 11.3~12.1 m depth cover and is a part of roadbed facility construction section ordered by OO public corporation. The improved grouting method provides pre-construction work condition assessment technique through new water injection limit test and grouting effect assessment technique by grouting type assessment. It also includes assessments on interval of joints, appropriate grouting pressure, and optimal operation time to be applied to current operations. Application of the grouting method allowed the smooth road management in shallow-depth grouting construction area located upper part of tunnel excavation. Moreover, the possibility of the application of the method not only to shallow-depth grouting construction but also to various steel pipe-reinforced grouting constructions was confirmed.