• Journal of the Korean GEO-environmental Society
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• v.18 no.2
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• pp.5-19
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• 2017

Underground excavation for building construction in Korea is changing from conventional support method (Strut, Ground anchor) to inside permanent support method by stability, economic, circumstances around excavation and etc. This study was selected the sites of Top-down, New Top-down, S.P.S, S.T.D and B.R.D in general use. This study was compared and analyzed a construction cost and period between aforementioned methods and conventional support method. Also, this study was confirmed the stability of temporary retaining wall by analysis for measurement data under construction. As a result, this study can grasp that most improved permanent support method is excellent in economic and constructability than conventional support method in case of deep excavation and rapid appearance of bedrock.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2003.05a
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• pp.491-497
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• 2003

암반굴착 등을 위해서는 발파는 필수적인 지반공사 과정중의 하나이다. 그러나 도심지 공사 특히, 아파트 등 건물 공사일 때는 인근 주변에 기존 주택가들이 밀집되어 있어 발파진동으로 인한 영향을 미치기 쉽고 이것은 곧바로 민원으로 공사진행에 많은 어려움을 초래하는 결과로 이어진다.(중략)

• Journal of the Korea Construction Safety Engineering Association
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• v.1 no.2
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• pp.45-50
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• 1991

지하건설의 확충과 함께 터널 굴착기술의 향상과, 각종 공사용 기계의 개발, 도입에 의해 효율화도 진전되고, 능률과 안전면에서도 최근 큰 발전이 이루어져 대규모 터널공사와 지하공사의 건설이 활발하게 이루어지고 있다. 지하건설에 관련된 작업자의 건강에 대한 관심은 매우 높아지고, 건설공사현장에 있어서는 이러한 작업환경, 건강장해의 방지대책이 중요한 과제가 되고 있다.

• Journal of Convergence for Information Technology
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• v.11 no.8
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• pp.84-91
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• 2021

In the 21st century, a number of storm and flood disasters caused by rapidly changing climate change is increasing, and the number of flood accidents at construction sites is also increasing. However, no specific reduction measures have been presented and thereby safety management to prevent flood accident need to be improved. Therefore, in this study, the inundation pattern by downpour at the excavation site was interpreted and the inundation risk quantification method was used to classify the risk magnitude. Finally, using the fish-bone diagram, we derived the major reasons of inundation accident at construction site systematically. The simulation results showed that the inundation depths of small-scale excavation sites and excavation sites exceeded 3 m due to the fluid flowing through the excavation surface. In addition, depending on the excavation site, a high velocity temporarily observed and decreased due to the storage effect, or high velocity surpassing 10 m/s continued. Since this type of flooding can pose a risk to most or all workers, if proper management measures are insufficient, fatal damage to life and property could occur. Consideration of the roots of these disasters is judged to be helpful in understanding the causes of inundation accidents that result in casualties and presenting accident reduction measures.

• Proceedings of the Korean Society for Rock Mechanics Conference
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• 2001.03a
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• pp.132-138
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• 2001

홍콩 HMRT(Hongkong Mass Railway Tunnel) 지하철 공사현장에서는 터널굴착시 나타난 고경사절리로 인해 상당한 여굴이 발생하였다. 이에 대한 원인을 규명하기 위하여 각 터널별로 발생한 여굴의 양과 위치 등을 조사하고 이를 입찰설계단계에서 이루어진 시추공조사와 굴착단계에서의 막장검측에 의한 지질조건과 서로 비교, 분석하였다. 터널굴착에서 발생하는 여굴은 막장의 고경사 절리의 분포와 방향에 의해 영향을 받았으며, 암반조건 RQD, Q'와도 밀접한 관계를 가지는 것으로 나타났다. 본 현장의 분석에 따르면 터널설계시 고경사절리의 존재여부 및 분포, 방향성 등을 면밀히 조사하고 해석하여 사전에 여굴의 발생 가능성을 확인하는 것이 필요하다.

• Proceedings of the Korean Society for Rock Mechanics Conference
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• 1996.03a
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• pp.11-24
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• 1996

최근 들어 지하공간 활용에 대한 필요성이 강하게 대두되면서 지하암반 굴착공사가 매우 활발하게 진행되고 있다. 오래 전부터 공사되었던 지하철 및 산악터널 뿐만 아니라 오늘날에는 지하암반의 특수성을 이용한 지하공간 사업 즉, 지하양수 발전소, 핵폐기물 저장소, 유류 비축기지 등이 건설 중에 있으며, 지하공간과 관련된 대형 프로젝트가 구상되고 있다. (중략)

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 1999.06a
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• pp.157-162
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• 1999

본 연구는 현장의 굴착공사에 따른 토류 구조물 설치공사의 수행에 있어서 토류 벽체의 지지 구조체률 형성하는 Earth Anchor에 대한 시공의 적정성 여부 및 설계목적에의 부합 여부를 판정하여 토류 벽체의 안정성 판단 및 Earth Anchor의 설계 목적에의 부합성 여부를 판단하기 위하여 본 연구를 수행하며 실험의 기준은 SIA. Standard Edition 1977 규정에 따르며, Earth Anchor의 설계, 정착장 및 자유장의 길이를 적절히 산출하고 정착력에 대한 신뢰도, 즉 인발력을 실험하여 정착장의 소요 안전율을 추정하며 더불어 지반에 대한 비교, 판단도 행하는 것이 목적이다. (중략)

• Journal of the Korea institute for structural maintenance and inspection
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• v.9 no.2
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• pp.225-235
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• 2005

The stability of innovative prestressed wale system applied in urban excavation was investigated. The IPS is a wale system prestressed by tension of steel wires. The IPS consists of steel wires, H-beam support and wale. The IPS provides a high flexural stiffness to resist the bending moment caused by earth pressures. And the IPS transmits earth pressures due to excavation to corner struts. The IPS provides a larger spacing of support, economical benefit, construction easiness, good performance and safety control. This paper explains basic concept and mechanism of the IPS and presents the measured performances of the IPS applied in urban excavation. In order to investigate applicability and stability of the IPS in urban excavation, observations and measurements in site were performed. The IPS applied in urban excavation was performed successfully. The results of the field instrumentation were presented. The measured performances of the IPS were investigated. And behavior of the wall and corner struts was investigated.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.8
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• pp.26-35
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• 2020

Tunnel construction is an important part of Korean public construction projects. Although the development of various equipment and technologies has led to advances in tunnel construction methods that are implemented on sites, the cost standards related to such works do not yet reflect the realities of the construction sites. A literature review and site surveys were conducted to suggest reasonable cost standards for tunnel work that reflects the realities of the field. First, each item in the cost standards for tunnel work, as established in the Construction Standard Production Rates, were analyzed. The results were compared with the actual costs implemented on tunnel projects. The key items analyzed included those regarding the work cycle time, such as rock classification, profiling survey, drilling speed, and muck-disposal processing equipment combination, as well as the number of people put to tunneling work. Based on the site survey results, improved estimates regarding the cycle time per one tunnel drilling blast, drilling speed of the machine, muck disposal processing equipment combination, and the number of people put to tunneling work were suggested. This study suggests the cost standards that reflect the realities of tunneling sites. The results are expected to help ensure adequate costs for tunnel construction projects.

• Explosives and Blasting
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• v.23 no.1
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• pp.31-39
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• 2005

This study is based on the reseach about conte. track$(Dugso\~wonju)$ double line electric railway tunnel. Authors conducted test blasting to examine the effect of blasting pollution. To be conducted safe and effective work by using this result studies sailable substitution excavation method. No-vibration section generates continuously the vibration of breaker working to go abreast necessarily secondary fragmentation working and according to judging that application is actually difficult in case of the condition of study site, the period of construction, the cost of construction, the efficiency of construction, pre-heavy caliber horizontally boring working + line drilling method + vibration control secondary blasting method excavation working is possible from level within blast vibration standard.