• Tunnel and Underground Space
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• v.13 no.5
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• pp.353-361
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• 2003

For RMR and Q rock mass classification at the design and construction stage, evaluation of groundwater condition is usually based upon the experience due to the restriction of available methods. Based on the results of Taejon LNG Pilot Cavern which acquire joint water pressure, inflow rate of ground water and hydraulic conductivity model, estimates from numerical analysis and analytical solutions were compared to verify each evaluation method. As the result, the Raymer(2001) approach was found to be efficient for estimating inflow rate and corresponding value.

• Tunnel and Underground Space
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• v.2 no.1
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• pp.164-176
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• 1992

The conical-ended borehole technique and hemispherical-ended borehole technique are proposed, for the accurate stress measurement within a rock mass. Theory of stress tensor determination and in situ measurement system are presented with successful case examples, and the characteristics of stress distribution within rock masses are examined by the multiple times measurement in a single borehole. Subsequently, the problem in relation to the numerical approach for cavern designing is discussed on the basis of the dependency of the stress discontinuity on the geological discontinuities and so on.

• Explosives and Blasting
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• v.12 no.1
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• pp.32-38
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• 1994

This study Is to summarize the contents for the investigation and design of the construction for oil storage. Since underground caverns are large scale, in their construction one should consider the mechanical stability of cave·rns and the economic view of construction. On the basis of them, cavern's section and layout were determined and water curtains were designed to maintain hydraulic equilibrium so that gases were sealed tightly. Also the supporting criteria for rock bolt and stotcrete were determined by means of the classification of rock masses and the results of finite element method. The criteria of grouting reinforcement were presented according to the results of injection test in the pilot holes of working face.

• Tunnel and Underground Space
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• v.3 no.1
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• pp.24-32
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• 1993

Groundwater movement is one of the most important elements in the construction and management of underground oil storage cavern. To control the groundwater flow, grouting is run in parallel with water curtains. But as traditional grouting is conducted within cavern before and after excavation, the effect of grouting is delayed and the injection sphere is limited in the rock mass. Therefore, it is desirable to introduce a more extensive and effective grouting. This article is to present the caly grouting, which was the first to be carried out in the construction of underground caverns for oil storage in Japan. After conducting the clay grouting, the effect was confirmed by ground water level and infiltration quantity to the caverns.

• Tunnel and Underground Space
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• v.12 no.4
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• pp.291-303
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• 2002

In this study, three-dimensional block generation program was developed using the discontinuities input data for three-dimensional mechanical and hydro-mechanical analysis. Shi's two dimensional theory and program was extended to those of three-dimension and the deformations of blocks were calculated. The two-dimensional hyro-mechanical theory of DDA was also extended to three-dimensional theory and coupling deformation of the underground cavern was analyzed considering discontinuities.

• Tunnel and Underground Space
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• v.2 no.2
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• pp.190-198
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• 1992

This study is to summarize the contents for the investigation and design of the construction for oil storage. Since underground caverns are large scale, in their construction one should consider the mechanical stability of caverns and the economic view of construction. On the basis of them, cavern's section and layout were determined and water curtains were designed to maintain hydraulic equilibrium so that gases were sealed tightly. Also the supporting criterial for rock bolt and stotcrete were determined by means of the classification of rock masses and the results of finite element method. The criteria of grouting reinforcement were presented according to the results of injection test in the pilot holes of working face.

• Magazine of korean Tunnelling and Underground Space Association
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• v.4 no.3
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• pp.23-37
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• 2002

프로덕트 관리를 통하여 발주자에게 제공해야 하는 산출물에 대한 구체적인 특성 및 제원이 규명되면, 프로젝트 관리를 통하여 발주자에게 제공해야 하는 산출물에 대한 구체적인 작업 및 자원이 규명된다. 또한 프로젝트 관리는 설정된 공기, 공사비, 품질 등의 프로젝트 목표를 만족시킴으로써 그 역할을 수행하게 된다. 최근 국내외 프로젝트의 입찰 과정을 볼 때 발주자의 요구사항이 점점 까다로워지고 제약 조건은 더욱 강화되고 있는 추세이다. 따라서 몇몇 사람의 특화된 감각이나 과거 수행된 계획의 답습만으로는 이러한 추세에서 제대로 대응하여 프로젝트 목표를 달성하는 것은 매우 힘든 실정이다. 본 기술보고에서는 프로세스를 통하여 프로젝트 계획을 개발함으로써 과학적이며 체계적인 프로젝트 관리가 이루어질 수 있음을 보여주고자 한다.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 1996.04a
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• pp.173-181
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• 1996

In this study, a stochastic finite element model is proposed with a view to consider the uncertainty of physical properties of rock mass in the analysis of structural behavior on underground caverns. Here, the Latin Hypercube Sampling technique, in which can makeup weak points of the Monte Carlo Simulation, is applied for the analysis of underground cavern. The validity of the newly developed computer program has been confirmed in terms of verification examples. And, the applicability of the program to the field has been tested in terms of the analysis of the underground oil storage cavern in korea.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.2 no.1
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• pp.34-45
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• 1984

The condition of underground basic rock and the location of cavern site can be found by means of seismic surveying is one of the physical exploration methods by which the prelimirary investigation of underground storage constructions are made in order to maximize the use of a land. This study is valuable in the point of showing a method for the decision of the property of a underground facilities estabilishment, by analying the elastic wave velocity and the distribution of a lower velocity zone and by grasping the weak zone of the basic rock.

• Proceedings of the Korean Nuclear Society Conference
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• 2004.10a
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• pp.753-754
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• 2004