Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Tunnel and Underground Space
Journal Basic Information
Journal DOI :
Korean Society for Rock Mechanics
Editor in Chief :
Volume & Issues
Volume 16, Issue 6 - Dec 2006
Volume 16, Issue 5 - Oct 2006
Volume 16, Issue 4 - Aug 2006
Volume 16, Issue 3 - Jun 2006
Volume 16, Issue 2 - Apr 2006
Volume 16, Issue 1 - Feb 2006
Selecting the target year
Numerical Analysis of Groundwater Flow through Fractured Rock Mass by Tunneling in a Mountainous Area
Kim, Hyoung-Soo ; Lee, Ju-Hyun ; Ahn, Ju-Hee ; Ahn, Gyu-Cheon ; Yoon, Woon-Sang ;
Tunnel and Underground Space, volume 16, issue 4, 2006, Pages 281~287
Intake of groundwater by tunneling in a mountainous area mostly results from groundwater flow through fractured parts of total rock mass. For reasonable analysis of this phenomenon the representative joint groups 1, 2, and 3 have been selected by previous investigations, geological/geophysical field tests and boring works. Three dimensional fractures were generated by the FracMan and MAFIC which is a three dimensional finite element model has been used to analyse a groundwater flow through fractured media. Monte Carlo simulation was applied to reduce the uncertainty of this study. The numerical results showed that the average and deviation of amounts of groundwater intaked into tunnel per unit length were
. It is concluded that tunnel would be stable on impact of groundwater environment by tunneling because of the lower value than
as previous and present standard on the application of tunnel construction.
Running Safety Analysis of Railway Vehicle Systems for Ground Vibration
Choi, Jun-Sung ; Jo, Man-Sup ; Lee, Jin-Moo ;
Tunnel and Underground Space, volume 16, issue 4, 2006, Pages 288~295
In this study, dynamic behavior of the vehicles is analyzed, while the track is subjected to lateral vibrations due to earthquake and blasting load. A computer program(WERIA, Wheel Rail Interaction Analysis) is used, which can simulate dynamic responses of vehicles subjected to lateral vibrations. The analysis considers two types of vehicles: I.e. power cars of KTX and Busan subway train. It can also consider the interaction with sub-structures such as tracks and soil. The creep force module is considered, and the running safety of railway vehicles subjected to earthquake and blasting loading is studied. Based on the results of this study, the running safety of the vehicles can be confirmed against lateral vibration.
Feasibility Study of Underground LNG Storage System in Rock Cavern
Chung, So-Keul ; Han, Kong-Chang ; Park, Eui-Seob ;
Tunnel and Underground Space, volume 16, issue 4, 2006, Pages 296~306
It is difficult to solve problems regarding the adjustment on demand and supply of LNG due to seasonal variations of domestic demand of LNG, a discordance among import pattern and limits of storage facilities and so on. Also, there may be instability in LNG supply due to chances of accidents at LNG producing areas. Therefore, it is very important to secure large LNG storage facilities and to stabilize LNG supply management on a long term basis. The objective of this study is to examine the real-scale applicability of a lined underground rock storage system, which have been verified by a successful operation of the Daejeon LNG pilot plant. The new technology has many advantages of better economy, safety and environment protection, for above-ground and in-ground storage systems. The results of this study may promote the first ever real scale underground LNG storage system in a rock cavern.
A Case Study on the Effect of Fault Reactivation on Groundwater Flow around a Hypothetical HLW Repository
Seo, Eun-Jin ; Hwang, Yong-Soo ; Han, Ji-Woong ;
Tunnel and Underground Space, volume 16, issue 4, 2006, Pages 307~312
Radionuclide released from corroded container migrates through groundwater flow pathway in the underground rock. Therefore it is important to study the groundwater flow analysis for total system performance assessment of a HLW repository. In this study assuming a geological change of underground rock in future, the two dimensional groundwater flow analysis is done by the NAMMU, the assessment code for groundwater flow in porous media. Assuming the hypothetical repository with the reactivation of fault in the vicinity of it, the effect of change in aperture and permeability by reactivation of fault around a repository on groundwater pathway is studied.
Deformation Behaviors around Tunnel in Anisotropic Rocks Considering Joint Orientation and Rock Pressure Condition Using Scaled Model Tests
Jung, Hyung-Rae ; Kim, Jong-Woo ;
Tunnel and Underground Space, volume 16, issue 4, 2006, Pages 313~325
In this study, scaled model tests were performed to investigate the deformation behaviors around tunnels located in anisotropic rocks. Fifteen types of test models which had respectively different joint angles and rock pressure conditions were made, where the modelling materials were the mixture of sand, plaster and water. All of the tested models showed the shear failure mechanism at the stress-concentrated regions and sliding phenomena according to the joint planes. The direction of joint inclination turned out to have great effect on the tunnel deformation behaviors. The models of joint inclination less than
showed considerable floor heavings. The model of
joint inclination showed the least tunnel convergence among the tested models regardless of rock pressure condition, so that it was thought as the most stable model. Furthermore, the failure mechanisms and deformation behaviors of tunnel models were strongly dependent on the coefficient of rock pressure.
A Study on the Characteristics of Blasting Vibration by Superposition Modeling
Kang, Choo-Won ; Kim, Seung-Hyun ; Park, Hyun-Sik ;
Tunnel and Underground Space, volume 16, issue 4, 2006, Pages 326~333
In this study, the vibration waveform of the single hole which is not interfered from the different blasting holes is separated, the each dominant frequency which is determinated through the Fast Fourier Transform(FFT) is measured. Also the separation waveform executed a superposition modeling which changes to delay time from 1ms to 80 ms in 1ms interval and controls the number of blasting holes from 2 holes to 15 holes in order to investigate the effect of PPV according to the duration time of the vibration and the number of blasting holes. As a result of analysis, the longer the duration time of the vibration, the longer the delay time which is not interfered from the different blasting holes and the effect regarding the number of blasting holes from inside identical delay time did not appear a lot.
Suggested Method for Determining a Complete Set of Micro-Parameters Quantitatively in PFC2D
Jong, Yong-Hun ; Lee, Chung-In ;
Tunnel and Underground Space, volume 16, issue 4, 2006, Pages 334~346
The discrete element code in 2-D, PFC2D, has been used as a tool to simulate various phenomena in rock mechanics and rock engineering. However, the code has an disadvantage that procedure to determine micro-parameters, namely properties of particles and contacts is repetitive and time-consuming. In this study, we analyzed the effect of micro-parameters(for generation of a contact-bonded model) on macro-properties(that were measured numerically by uniaxial compressive test). Based on the analysis, also, the time-saving and reliable method was suggested to determine a complete set of micro-parameters. In order to verify the suggested method, numerical specimens were generated in PFC2D for 10 different rock types at home and abroad. By the two trials for each specimen, in the result, the Young's modulus, Poisson's ratio and uniaxial compressive strength could be reproduced with being in relative error by about 5% to the values obtained by laboratory tests.
Tunnel Safety Diagnosis in Near-excavation by In-depth Inspection of Tunnel
Kim, Seok-Jae ; Kim, Min-Seok ; Kim, Jun-Chul ; Yoo, Young-Il ; Oh, Joung-Bae ; Oh, Sae-Joon ;
Tunnel and Underground Space, volume 16, issue 4, 2006, Pages 347~356
We analyzed case studies doing in-depth inspection of tunnel to maintain safety of existing tunnel in constructing new tunnel near to a existing tunnel with single track. Futhermore, We accomplished in-depth inspection of existing tunnel and numerical analysis. We suggested remedies to security safety of existing tunnel. We applied line drilling and pre-large hole boring method not to have an effect on existing tunnel and convinced the safety of existing tunnel from blast-vibration and blast-noise of numerical analysis. We planed to install basset system to measure displacement of existing tunnel according to excavating new tunnel.