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Keywords: tunnel
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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-ARMS10-2018-076
... Abstract The main design principle of unlined pressure tunnels/shafts in a hydropower scheme is to provide sufficient confinement (minor principal stress) to withstand the internal hydrostatic water pressure. Rock support is only provided in areas where very weak rockmass is encountered. The...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-158
... Abstract Round length in conventional tunneling can pose an economical effect. However, in Japan, the round length is generally determined through a ground class and support pattern according to the guidelines provided by owners. Round lengths, which are against the guidelines, are not easily...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-228
... Abstract On the basis of ascertaining the classification bases of tunnel collapses, i.e. type of tunnel, cause of collapse, speed of collapse, location of collapse in the tunnel, scale of collapse (including length and volume), form of destruction, economic loss and casualty, time-related...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-101
... Abstract Blasting operation is one of the most efficient techniques for rock breakage in tunnel engineering. Meanwhile blasting energy is dissipated through the ground which may produce some negative effects, such as ground vibration, flyrock, explosive noise, and air blast pressure. Ground...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-159
... arunachal pradesh rock bolt rock mass numerical modeling tunnel Estimation of Rock Bolt Length for a Tunnel by Numerical Modeling: A Case Study in Himalayas, Arunachal Pradesh, India Shyo Prasada*, Ratan Dasb and T.N. Singhb a RD Konsultants, New Delhi, India b Indian Institute of Technology Bombay...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-072
... pressure tunnels. Such approach may help replace the traditionally used concrete and steel lined pressure tunnel systems, which are both cost intensive and long construction time taking. Nevertheless, there are several technical, geological and geo-tectonic challenges associated to this solution, which...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-154
... Abstract Many shield tunnels have been constructed, in urban and mountainous areas, which should be maintained properly to confirm the structural stability and secure the users' safety. However, the influence of geological conditions, the fluctuation of water pressure and the difference of...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-237
... Abstract The behaviour of jointed rock mass is highly dependent on the properties of rock joints. One of the most important property used in identifying the behaviour and performance of rockmass is the joint stiffness and the deformation behaviour of tunnels in jointed rocks is dependent on...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-125
... Abstract The transition zone, i.e. where the pressurized water enters the steel lined section of the waterway, is a key component of the entire tunnel system in any underground hydropower project utilizing unlined pressure tunnels. Not only is it important for conveying the pressurized water...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-102
... Abstract The paper covers the construction and use of large caverns for temporary and permanent purposes on the example of the 27km long Semmering Base Tunnel in Austria. Semmering Base Tunnel is a twin tube, single-track railway tunnel with numerous cross passages and an underground emergency...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-216
... Abstract Underground structures are proving to be the smart structures by not only resolving various problems associated with storage and transportation but also helpful in maintaining traffic due to scarcity of land. Due to heterogeneous behavior of rock-mass, urban tunnels are highly...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-212
... Abstract The glass solidified body reprocessed by the high level nuclear waste disposal in the process of nuclear fuel recycle was the final design condition to construct the underground disposal tunnel under the over 300m depth in Japan. The design methodology and construction technique of...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-160
... ability of rock or soil to transmit water) and to maintain groundwater levels. Tunnels and dams are constructions in rock where a reduction in flow can be necessary. Reasons for rock grouting can e.g. be to provide proper function of the construction, maintain water table level, improve working conditions...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-221
... cost isrm international symposium cost penalty Reservoir Characterization reactor nuclear power plant accident power plant radioactive material asian rock mechanics symposium 29 unpp underground nuclear power plant tunnel Back to Underground Reactors P. Duffaut* and S. Sakuraib a Saint...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-107
... Abstract Support design in tunnels is challenging if the uncertainty in surrounding rock mass is high. Traditional reliability based design approach accounts for this uncertainty by selecting lowest cost design whose reliability index exceeds a threshold value. This traditional design is...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-161
... groundwater leakage (Gustafson 2012), and the implications of this have been studied in several underground constructions. Romeriksporten in Norway (Kitter⊘d et al. 2000; Kvӕrner and Snilsberg 2013), the Hsueh-Shan Tunnel in China (Chiu and Chia 2012), the Hallandsås rail tunnels (Mossmark et al., 2017), the...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-112
.... This study analyses the critical section of the Pahang Selangor Raw Water Transfer Tunnel under high overburden using the 2D elasto-plastic finite elements stress analysis software. Site observations showed that the high overburden stresses created a failure zone on the tunnel sides, which damaged the...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-244
... Abstract The manuscript presents initial results of a potential linkage between the mineral composition and structural strength in geological samples from a hydropower tunnel currently under construction. Changes in rock properties due to processes of both chemical as well as mechanical...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-247
... Abstract The construction of long distance water conveyance tunnels in western region of China is inevitably confronted with active faults, which is a unique geological structure with complicated formation mechanism and produces significant adverse impacts on engineering structures. Currently...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-192
... Abstract Tunnel collapse in weak rock masses occurs when the support pressure given by the installed support system is not adequate to sustain the weight of broken rock resulting from the excavation. Further, installation of support system will encounter great difficulty when the maximum...

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