• 지구물리와물리탐사
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• 제18권1호
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• pp.14-20
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• 2015

3차원 전기비저항 탐사법은 지하 전기비저항의 3차원적 분포 영상을 제공해 주므로 매우 효과적인 지반조사 방법 중의 하나이다. 본 연구에서는 붕락이 발생한 터널에 대하여 3차원 전기비저항 탐사를 수행하여 붕락의 원인으로 보이는 터널 주변의 파쇄대 및 석탄층의 발달 상황을 파악하고자 하였다. 이를 위하여 터널에 평행한 5개의 측선과, 수직한 11개의 측선에 대하여 2차원 전기비저항 탐사를 수행하고, 이들 자료를 통합하여 3차원 역산을 수행하였다. 역산 결과 얻어진 3차원 역산결과와 시추 자료를 종합하여 터널 붕락의 원인으로 해석되는 단층 파쇄대 및 탄층의 3차원적 분포 양상을 제시하였다.

• 대한공간정보학회지
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• 제15권4호
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• pp.89-96
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• 2007

터널시공현장에서 중요한 요소가 되는 미굴량과 여굴량, 그리고 내공변위 및 천단침하에 대한 자료는 대부분 변위계와 토탈스테이션에 의해 취득되어진다. 그러나 이러한 장비들은 다수의 작업자를 필요로 하고, 대상지점에 직접 접근하여 타겟이나 계측기를 설치해야 되는 등 여러 가지 불편함과 위험요소를 안고 있다. 최근에 개발된 리모트컨트롤 무프리즘 토탈스테이션은 이러한 단점을 해소할 수 있는 여러 가지 기능을 가지고 있다. 따라서 본 연구에서는 무프리즘 토탈스테이션과 제어용 노트북 컴퓨터 등을 조합하여 터널계측을 위한 1인 측량시스템을 구성하고 그 효율성을 평가하고자 하였다. 이를 위해 시공 중인 터널을 대상으로 기존의 측량방법과 본 연구의 측량방법으로 각각 관측을 수행하고 관측 소요시간, 정확도 등을 비교하였고 그 결과 본 연구의1인 무프리즘 측량시스템이 기존의 방법에 비해 효율적임을 입증하였다.

• 지질공학
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• 제24권4호
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• pp.455-461
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• 2014

The Honam-Jeju, Korea-Japan, and Korea-China subsea tunnel construction projects have drawn significant attention since the early 2000s. These subsea tunnels are much deeper than most existing natural shallow sea tunnels linking coastal areas. Thus, the need for developing new technologies for the site selection and construction of deep subsea tunnels has recently emerged, with the launch of a research project titled "Development of Key Subsea Tunnelling Technology" in 2013. A component of this research, an analysis of deep subsea geological structure, is currently underway. A ground investigation, such as a borehole or geophysical investigation, is generally carried out for tunnel design. However, when investigating a potential site for a deep subsea tunnel, borehole drilling requires equipment at the scale of offshore oil drilling. The huge cost of such an undertaking has raised the urgent need for methods to indirectly assess the local geological structure as much as possible to limit the need for repeated borehole investigations. This study introduces an indirect approach for assessing the geological structure of the seafloor through a submarine bathymetry analysis. The ultimate goal here is to develop an automated approach to the analysis of submarine geological structures, which may prove useful in the selection of future deep subsea tunnel sites.

• 한국구조물진단유지관리공학회 논문집
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• 제4권2호
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• pp.185-191
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• 2000

The safety problem of aged tunnels has been emphasized. For the effective maintenance, site inspection of tunnel structures and surrounding grounds are required periodically. Also, the determination of safety of tunnels is not a simple problem. So the role experienced engineer in the maintenance is very important and development of an expert system that can perform as the engineers, has been needed. In this study, from the results of numerical analysis in several case, new precision inspection rules which can substitute actual numerical analysis are determined by a commercial program FLAC and regression analysis under various parameters such as material property, lining thickness, overburden and laterial coefficients. They are added to the knowledge base to determine safety of tunnel lining. To verify the expert system, the results are compared with an existing tunnel diagnosis report. It can be concluded that the new rule are well represented the actual numerical analysis under various site conditions. Therefore it is expected that the systematic management for effective maintenance of tunnel structure will be possible.

• 한국터널공학회:학술대회논문집
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• 한국터널공학회 2005년도 학술발표회 논문집
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• pp.335-340
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• 2005

Recently, According to increased tunnel accident, a matter of concern in tunnel fire safety is on an interesting trend. In case of tunnel fire, Evacuation is a primary factor for refugee safety. Therefore safety measures should be taken to increase capability of evacuation. Evacuation walking speed and characteristics of movement in tunnel is differ from building or outdoor site so, these characteristics must be considered in tunnel safety planning. In this study has performed to evaluate the smoke movement and characteristics of evacuation by full-scale test method. and aimed for basic data establishment in characteristics of evacuation for tunnel safety system design.

• 화약ㆍ발파
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• 제13권3호
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• pp.7-18
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• 1995

On the Seoul sub-way tunnel works 7-20 site, Cautious blasting works were so effectivelly carried out. The vibration record were under 0.3cm/sec and blasting noise was under 80dB. Which was measured at the ground of house. At a result cautious blasting works under above allowable value was not influenced the structure of house and living conditions. On the architectural survey, They were some hair crack on the wall and floors but this was not a crack from blasting works.

• 화약ㆍ발파
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• 제12권1호
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• pp.5-31
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• 1994

On the Seoul Sub-way Tunnel works (8-6 site ). Cautious blasting works were so effectivelly tarried out the vibration record were under 0.3cm /sec and blasting noise was under 75dB which was measured at the ground of house. As a result cautious blasting works under above allowable value was not influenced the structure of house and living. On the architectural survey, There were some hair crack on the wall and floors but this was not a crack from balsting work.

• 화약ㆍ발파
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• 제10권2호
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• pp.3-7
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• 1992

Concerning to Taeku city subway construction project(1-4 site), the original design was adapted NATM Tunnel method to the 8 meter thickness of overburden. Surveyor checked sity and design material and finally decided to change into Open Cut method because overburden is not only below 1 1/2 times thickness of comparate Tunnel width but there is no traffic conjunction in job site.

• 터널과지하공간
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• 제14권3호
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• pp.175-187
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• 2004

고준위방사성폐기물 처분의 경우 심부 암반에 만들어진 처분장에 영구 처분하는 것이 최선의 방안으로 여겨지고 있다. 하지만 지하 심부의 암반에 대한 물리적, 화학적, 역학적, 열적, 수리적 물성과 이들과 핵종 이동의 관계, 처분환경에서의 공학적 방벽 및 암반의 거동이 처분장 안정성 및 안전성에 미치는 영향 등을 파악해야하는 어려움이 따른다. 특히 고준위폐기물 처분의 경우 장기간의 안전성을 고려해야하기 때문에 자연방벽과 공학적 방벽의 시간에 따른 거동변화도 고려하여야 할 필요가 있다. (중략)

• 터널과지하공간
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• 제7권4호
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• pp.274-283
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• 1997

It is necessary to estimate the soundness of tunnel using non-destructive tests(NDT) for effective repairs and maintenances. But, the state of tunnel lining could not be investigated using previous non-destructive techniques, due to the various types of support and accessibility only from one side in tunnel lining. Recently, the various non-destructive techniques such as ground penetrating radar(GPR) have been researched and developed for inspection of tunnel lining. In this study, the usefulness and applicability of GPR test in tunnel lining inspection has been investigated through model tests and tunnel site application. This paper described the tunnel lining inspection for lining thickness, cavity and support using GPR test. From the results of tests, we have concluded that GPR test are very useful and effective techniques to look into the interior of lining and measure the lining thickness.