• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.432-439
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• 2009

This research project was carried out to develop the technique to assess quantitatively and rapidly the stability of a tunnel by using the measured displacement at the tunnel construction site under excavation. To achieve this purpose, a critical strain concept was introduced and applied to an assessment of a tunnel under construction. The new technique calculates numerically the strains of the surrounding ground by using the measured displacements during excavation. A numerical practical system was developed based on the proposed analysis technique in this study. The feasibility of the developed analysis module was verified by incorporating the analysis results obtained by commercial programs into the developed analysis module. To verify the feasibility of the developed analysis module, analysis results of models both elastic and elasto-plastic grounds were investigated for the circular tunnel design. Then the measured displacements obtained in the field are utilized practically to assess the safety of tunnels using critical strain concept. It was verified that stress conditions of in-situ ground and ground material properties were accurately assessed by inputting the calculated displacement obtained by commercial program into this module for the elastic ground. However for the elasto-plastic ground, analysis module can reproduce the initial conditions more closely for the soft rock ground than for the weathered soil ground. The stability of tunnels evaluated with two types of strains, that is, the strains obtained by dividing the crown displacement into a tunnel size and the strains obtained by using the analysis module. From this study, it is confirmed that the critical strain concept can be fully adopted within the engineering judgment in practical tunnel problems and the developed module can be used as a reasonable tool for the assessment of the tunnel stability in the field.

• 화약ㆍ발파
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• 제12권4호
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• pp.10-21
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• 1994

The Tunneling Technique has been developing highly in Japan. Induced NATM pattern is ap-plied as it-self but is an apportunity to upgrade technologes of Concernning. As a result, Nonnel system as Laser marking system is significant developed result. Japan-Korea Tunnel leasing by international High way project is regarded hope-full for the world peace. It has described Euro-Tunnel too.

• 한국지구물리탐사학회:학술대회논문집
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• 한국지구물리탐사학회 2003년도 Proceedings of the international symposium on the fusion technology
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• pp.370-378
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• 2003

Continuous seismic refraction, reflection and echo-sounder surveys conducted at Koyna Project site provided geotechnical information which helped in choosing the alignment for Head race tunnel and in designing and choosing the site for Lake Tap. Seismic refraction survey both on land and in shallow water determined depths to bedrock and helped in inferring the bedrock quality. Seismic reflection survey mapped the subsurface stratigraphy with high resolution. Reservoir-bed and bedrock contours drawn from the results of the survey helped in choosing the tunnel alignment and the lake tap position cost effectively. It was inferred from the results of the survey that the geology and the quality of rock do not change unexpectedly around the site for extension of Head race tunnel and the lake tapping. The bedrock levels evaluated by seismic survey agreed remarkably well with those inferred in boreholes having Rock Quality Designation 90 percent or more.

• 한국건설관리학회논문집
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• 제20권2호
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• pp.37-43
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• 2019

주당 최장 법정 근로시간을 단축하는 내용의 '근로기준법 개정안'이 통과됨에 따라 근로시간 단축에 따른 근로자 소득감소, 공사기간 연장, 공사비 증가 등 다양한 문제가 발생하고 있다. 특히 다른 산업과 비교할 때, 생산성을 중시하는 건설 프로젝트의 경우 공종에 따라 주 52시간 근무제에 따른 영향의 정도가 더 클 것으로 예상되나 이에 대한 연구는 미흡한편이다. 이에 본 연구에서는 NATM 터널 공사를 대상으로 표준품셈 기반의 표준공정과 굴착 사이클 타임 그리고 공종별 단위 공기를 제시하고, 이를 통해 주 52시간 근무 적용에 따른 실제 작업조의 변화와 이에 따른 표준 공기 및 공사비의 영향을 분석하였다. 분석결과 굴착 공기와 총 공기는 각각 20%, 8.9% 증가하였으나, 굴착공사비와 총 공사비는 오히려 각각 1.2%, 0.5% 감소하는 것으로 확인되었다.

• 기술사
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• 제43권2호
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• pp.30-33
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• 2010

Immersed tunnel had been a rather new term in Korea before Busan-Geoje fixed link project was started and became known through the media. Although Korean is unfamiliar with the immersed tunnel, this construction method has a long history in the world. Busan-Geoje Fixed Link immersed tunnel consist of 18 elements and each element is approximately 180m long. These tunnel elements are prefabricated of reinforced concrete in a temporary dry dock and are towed to the site and lowered into final position in a dredged trench and are placed on a screeded gravel bed directly without temporary support.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2008년도 동계학술발표대회 논문집
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• pp.67-70
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• 2008

As a part of the project on road tunnel fire safety system development, Quantitative Risk Assessment program was developed. In this study, We carried out Quantitative Risk Assessment with this program by using a factor of cross passage interval, warning announcement time and congestion ratio etc for 1km tunnel with natural ventilation. In the case of 250m below of cross passage interval, Risk value due to warning announcement time was a slightly changed. but if cross passage interval is more than 250m, expected fatalities in the same HRR(heat release rate) was sharp increased. As a result, Quantitative Risk Assessment program which was developed in this research project is possible to risk assessment with ventilation type, cross passage for evacuation and detection system response property etc. hereafter, this program look forward to use as a tool for road tunnel performance based design.

• 화약ㆍ발파
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• 제13권4호
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• pp.28-38
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• 1995

This paper was addressed by fall seminar of society of explosives engineers of Korea. In Japan, total length of cable was 600km and tokyo was 260km and it will extend cable tunnel 5~10km every year in Tokyo. NTT service project has been working as a optic fiber net works and in 2010, it will be done. FIF. FTTH so call fiber to the home for the purpose of multiplicity. For the above project. First, it should be developing auto Non-excavation tech, 2nd developing soil recycling system.

• 국제학술발표논문집
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• The 1th International Conference on Construction Engineering and Project Management
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• pp.544-549
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• 2005

Web-based collaboration platforms present construction project teams with an opportunity to improve the efficiency of document exchange, better control project communications and enhance team collaboration. However, many construction professionals are still not convinced that these platforms, in their current form, are fit-for-purpose and yield sufficient efficiencies for the construction procurement process. In an attempt to improve the current ICT diffusion process, this paper evaluates the implementation of a web-based collaboration tool on the Lane Cove Tunnel (LCT) project in Sydney, Australia. Moreover, the paper provides strategies for achieving more effective implementation of web-based collaboration platforms in the construction sector.

• 한국터널지하공간학회 논문집
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• 제13권1호
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• pp.19-32
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• 2011

터널 공사 중 많은 문제를 야기시킬 수 있는 불확실한 지반상태 및 터널 공법에 따른 여러 리스크를 최소화 할 수 있도록 전반적인 위험도 평가를 터널 설계 시 반드시 수행하여야 한다. 본 연구에서는 도심지 및 하저터널 구간의 터널공법으로 NATM 또는 쉴드 TBM 적용시 공법별 발생할 수 있는 리스크에 대하여 분석하였다. 우선 연구대상 지역의 주요 리스크 항목을 선정한 후 공법적용시 발생 가능한 리스크와 그 영향을 검토하고, 각각의 리스크 발생가능성과 터널공사에 미치는 위험도에 따라 정량적으로 등급화 하였다. 이러한 리스크 분석을 통하여 주요 위험도 영향을 고려한 공사비 및 공기분석을 수행하고 터널공법별 비교위험도를 평가하였다. 본 연구결과를 바탕으로 복합지반으로 구성된 도심지 대단면 터널에 대해 리스크 발생을 최소화 할 수 있는 안전하고 경제적인 터널공법을 선정하였다. 단, 본 연구는 국한된 지층 및 특별조건에서의 비교위험도를 평가한 결과임을 밝혀둔다.

• 한국방재학회:학술대회논문집
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• 한국방재학회 2008년도 정기총회 및 학술발표대회
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• pp.545-548
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• 2008

In this study, the concept of safety impact assessment to achieve 'Design-for-Safety' in design phase is introduced. For this purpose, safety impact assessment model was devised and a methodology using the risk-based safety impact assessment approach for NATM of tunnel projects is suggested. The suggested methodology includes safety information survey, classification of safety impact factors caused by design and construction, and quantitative estimation of magnitude and frequency of safety impact factors. A real-world case study on the safety impact assessment of a tunnel construction project is also provided in the paper.