• Journal of the Korean GEO-environmental Society
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• v.14 no.12
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• pp.61-69
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• 2013

As construction for road and train tunnel is increasing, various geotechnical conditions can be faced during the construction stage. Especially, if the tunnel is located in limestone area, the cavity is mostly to locate in tunnel planning location. One or some cavities which can be harmful for tunnel safety are predicted. Hence, this study was fulfilled to confirm the influence between tunnel and cavity using laboratory scale down model test and numerical analysis. The scale down model test was carried out to confirm the failure load of the model ground about the interval length of cavity and tunnel and to analyze behaviour characteristics of the model ground on the cavity shape. From the model test result, the failure load decrease in accordance with decreasing of interval length between cavity and tunnel within 0.5D. The numerical analyses were carried out for verification about scale down model test. From the numerical analysis result, tunnel safety decreases in the case of the interval between cavity and tunnel within 0.5D.

• Proceedings of the KSR Conference
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• 2001.10a
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• pp.404-409
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• 2001

현대건설(주)은 중앙선 (덕소 ∼ 양수) 복선 전철공사 실시설계 입찰을 위한 일련의 조사 및 설계를 수행하였다. 본 논문은 사업 구간에 속해 있는 월문터널에 대한 설계를 수행하는 과정에서 현재 기존 노선이 운행되는 있는 단선 터널에 근접한 지역에서 공사 중에 운행되고 있는 열차의 안정성을 확보하기 위한 기초 조사를 선행하였다. 본 논문의 목적은 현재 국내에서 시행되고 있는 근접 터널 시공 문제에서 (특히, 화약 발파에 의한 터널 설계 및 시공) 문제시되고 있는 적절한 진동제어에 대한 수치가 필요 이상으로 적용되고 있다는 점에 대하여 향후, 경제적이고 도전적인 설계를 위한 제시를 하기 위함에 있다.

• Korean Journal of Construction Engineering and Management
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• v.18 no.4
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• pp.36-47
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• 2017

As a typical domestic subsea tunnel construction the Gadeok subsea tunnel applying the method of immersed tunnel has been completed and the Boryeong-Taean subsea tunnel is under construction using NATM. The high-speed railway subsea tunnels between the Honam and Jeju are under consideration, and the feasibility of constructing subsea tunnels with Japan and China is also under consideration. However, it is difficult to provide the process plan information for the construction work such as the analysis of the feasibility of the subsea tunnel and the prediction of the proper construction period because there is no case of domestic construction for it applying the shield TBM method. Due to economic and other reasons, government organizations are reluctant to apply the shield TBM, and there is lack of data on the construction process management field using the shield TBM method. Therefore, a standard construction process management system for the subsea tunnel is needed to analyze the feasibility of the subsea tunnel and to predict the proper construction period. By presenting the standard construction process management system of subsea tunnels such as WBS, Network Diagram, and construction period calculation model, I hope to contribute technically and economically to future subsea tunnel projects.

• Journal of Korean Tunnelling and Underground Space Association
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• v.24 no.3
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• pp.279-292
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• 2022

Unexpected anomalies in the geotechnical investigation at design stage may cause problems during tunnel excavation. Therefore, it is important to predict the ground condition ahead of a tunnel face during tunnel excavation in order to prevent tunnel collapse. Despite the fulfillment of an electrical resistivity survey at the tunnel face, the existing electrical resistivity survey program can produce distorted results by the limitation of tunnel modelling. In this background, this study develops a modelling program for an electrical resistivity survey considering the tunnel shape. Numerical simulation and inverse calculation were performed for the electrical resistivity survey in the tunnel using the developed program. As a result, it was proved that the developed program could predict accurately the anomalous object's location and condition ahead of the tunnel face.

• Proceedings of the Korea Water Resources Association Conference
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• 2007.05a
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• pp.542-545
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• 2007

터널의 노면 양쪽에 관로를 설치하여 유입된 지하수를 배출시키는 방법은 일반적인 터널 배수공법이지만 배수관로의 설치를 위한 추가적인 굴착은 공사기간과 공사비의 상승으로 이어지는 실정이다. 이에 터널 내에 별도의 배수관로 굴착 없이 노면 하부에 다열기둥을 일정 간격으로 매설하여 지하수의 흐름방향을 노면 하부로 유도시키는 경제적인 배수시스템이 현재 연구 중이다. 이 터널배수시스템은 추가적 굴착이 없어 기존의 배수시스템보다 경제적이지만 다열기둥의 연속적인 배치를 필요로 하므로 기존의 관로배수방식보다 더 많은 유체의 흐름저항을 받게 된다. 따라서 유체의 흐름에 효율적인 다열기둥 간의 배치간격에 대한 연구가 필요하다. 그래서 본 연구에서는 노면 하부에 다열기둥이 매설된 터널 내로 유입하는 지하수 배출을 목적으로 다열기둥 간의 배치간격에 따른 Manning계수의 변화를 수리실험을 통해 측정 분석하였다. 특히 Manning계수는 개수로에서 유체흐름 저항의 정도를 파악하는 데 이용되는 인자로 이를 활용하여 지하수 배수에 적절한 다열기둥 배치간격을 산정하였다. 본 연구를 통해 얻어진 수리실험 자료는 노면하부에 다열기둥을 매설하는 터널공사의 실제 설계를 위한 기초적인 참고자료로 사용될 것으로 기대된다.

• Journal of Korean Society for Geospatial Information Science
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• v.14 no.3 s.37
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• pp.31-37
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• 2006

The existing tunnel survey method contains many problems of taking much measuring time, increasing construction expenses, and delaying a term of construction. Therefore the site survey system for an improvement efficiency is developed. This system will be able to solve the ewer factor and the problem of curtailment of time and expenditure. In order to solve these problems it connected a measurement equipment and a notebook computer, and developed the system which simultaneously with tunnel measurement it will be able to decide locations and errors from site at real-time. The development or the tunnel survey system minimize the error occurrence as measuring tunnel, and the probability of more or less excavation. Therefore this site survey system leads to the effect of the improvement execution quality of work, the cost reduction and the construction term reduction.

• Magazine of korean Tunnelling and Underground Space Association
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• v.8 no.3
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• pp.44-49
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• 2006

• Magazine of korean Tunnelling and Underground Space Association
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• v.5 no.1
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• pp.8-19
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• 2003

• Magazine of korean Tunnelling and Underground Space Association
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• v.1 no.2
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• pp.125-133
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• 1999

• Magazine of korean Tunnelling and Underground Space Association
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• v.1 no.1
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• pp.19-44
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• 1999