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Keywords: tunnel face
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Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-001
... flow problem ADE scheme asian rock mechanics symposium 29 reservoir geomechanics Simulation tunnel face high-order axisymmetric ade scheme Upstream Oil & Gas HM response deep tunnel Gutierrez coupling technique isrm international symposium axisymmetric ade scheme equation prassetyo...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-068
... ahead of tunnel face might cause tremendous disaster. However, in the case of large-scale tunnel, it is quite difficult to set monitoring wells on the surface due to its huge overburden. Here, in this study, several types of innovated groundwater surveying and monitoring technique from tunnel inside are...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-080
... Abstract Evaluation of the distribution of fractures in a rock mass ahead of a tunnel face is required for safe and reasonable tunnel excavation. To evaluate not only the position of fractures, but also their inclination before tunnel excavation, a directional borehole radar may be a suitable...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-095
... Abstract The authors developed a system for predicting geological conditions not just of excavated areas but also ahead of the tunnel face by processing drilling data using Ordinary kriging, a geostatistical approach, and by visualizing conditions in real time. Using auto-controlled face...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-163
... Abstract Appropriate construction of tunnel requires accurate determination of crack distribution, rock strength, and weathering grade. Tunnel face evaluations are commonly based on subjective visual inspections, the results of which are likely to vary from person to person. While quantitative...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-241
.... In this paper, digital image processing is applied to detect edges in the images of two selected tunnel faces, clusters the signals and a structure map is generated which can be used for determining joint orientations, spacings and trace lengths. The applied method resulted in both cases in a very...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-121
... Abstract The application of effective tunnel reinforcement method is essential to stabilize the face when digging into loose ground by the NATM. In Japan, long face bolts (usually 76mm in diameter) are frequently used as the reinforcement of tunnel face. The bolt, made by GFRP (Glass Fiber...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-137
... Abstract It is difficult to predict detailed ground conditions of a mountain tunnel with a large overburden from a surface geological survey only. The ground conditions ahead of a tunnel face must be predicted for efficient and safe tunnel construction. The authors have proposed a simple...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-122
... Abstract Tunnel construction involves various drilling works such as for installing rock-bolts and blast explosive charges. An examination of rock-bolt hole drilling at a tunnel face showed that drilling efficiency is greatly influenced by the geological conditions of the surrounding rock mass...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-132
... & Gas tunnel face excavation stabilization Reservoir Characterization surface subsidence october 2014 loosening axial force investigation pre-supporting steel pipe asian rock mechanics symposium arms8 convergence tunnel portal 8th Asian Rock Mechanics Symposium ARMS8 14-16 October 2014...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-117
... Abstract It is difficult to understand the geological condition accurately ahead of the tunnel face during tunnel excavation. Accordingly, for the safe and economical tunnel excavation, particularly in complicated ground conditions, survey techniques should be effectively used because they...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-139
...-grouting actually decreased the permeability of the original ground. Furthermore, we report the result of the excavation of the pre-grouting and non-pre-grouting sections. By observing the tunnel face continuously, it was reconfirmed that the nano-fine cement grout permeated homogeneously into sandy soil...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-159
... can utilize non-blast construction noises. The seismic noises of the tunnel construction could be adopted as a seismic source for the geological survey ahead of a tunnel face. And seismic interferometry is useful for SWE-SSRT as it requires fewer, less-complicated measuring devices. In this paper, we...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-160
... Abstract Although a spherical tunnel face has been reported to enhance the stability of tunnels where the tunnel is excavated using Sequential Excavation Method, the effect of the shape of the tunnel face on the deformation behavior, mechanical stability, and ease of construction for the...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-260
... large, the resolution in velocity structure by this technique becomes poor. The authors developed a new exploration method by the use of drilling vibration data called T-SPD (Tunnel Seismic Probe Drilling) to estimate seismic wave velocity distribution ahead of the tunnel face to be utilized for...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-113
... geological ratings at tunnel faces. Because data used and its processing method for geotechnical prediction change according to purposes, this study proposes the integrated prediction system for geological conditions ahead of tunnel faces, which is composed of long-interval, middle-interval, and short...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-123
... of overbreaks and cracks in shotcrete support in the tunnel. Accordingly the designs have been modified. The benefits of displacements/convergence monitoring have been highlighted at the end. reservoir geomechanics Siltstone convergence Upstream Oil & Gas tunnel face mixed geology...
Proceedings Papers

Paper presented at the ISRM International Symposium - 6th Asian Rock Mechanics Symposium, October 23–27, 2010
Paper Number: ISRM-ARMS6-2010-078
... calculation of the pressure acting on tunnel support structures was given by Samurai [10]. He introduced an "equivalent initial stress" in order to solve three-dimensional effects of the tunnel face progression with a two-dimensional plane strain model of tunnel- support structures for elastic and...
Proceedings Papers

Paper presented at the ISRM International Symposium - 6th Asian Rock Mechanics Symposium, October 23–27, 2010
Paper Number: ISRM-ARMS6-2010-100
... Abstract: The Longitudinal Deformation Profile (LDP) is a graphical representation of the radial displacement versus the distances to the tunnel face for an unsupported tunnel section. LDPs can be computed by numerical models. Also, Vlachopoulos and Diederichs [1] have proposed accurate...
Proceedings Papers

Paper presented at the ISRM International Symposium - 5th Asian Rock Mechanics Symposium, November 24–26, 2008
Paper Number: ISRM-ARMS5-2008-010
.... Introduction For safe and economic construction of a tunnel in a fault zone, appropriate method have to be employed to predict and prepare for sudden change in ground condition ahead of the tunnel face as early as possible. Studies on the prediction of fault zone ahead of tunnel face using the convergence of...

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