...12th Asian Rock Mechanics Symposium, Hanoi, Vietnam - The 2022 ISRM Sponsored Regional Symposium ©2022 ISRM, VSRM. ISBN: 978-604-357-103-5 Do Nhu Trang, Pham Quoc Tuan et al. (Eds.) An Analysis Load-transfer Due to Blasting to the Adjacent Tunnel - a Case Study in Ca Road Tunnel Project Do Nhu...

...12th Asian Rock Mechanics Symposium, Hanoi, Vietnam - The 2022 ISRM Sponsored Regional Symposium ©2022 ISRM, VSRM. ISBN: 978-604-357-103-5 Do Nhu Trang, Pham Quoc Tuan et al. (Eds.) Combining Empirical and Numerical Approaches for Design of Tunnels using the Norwegian Method Tunnelling (NMT...

... was built with 2740 m headrace tunnel, underground powerhouse, and 415 m tailrace tunnel. The project was successfully put in operation in December 2018 and in good production since then. This paper presents practical experiences during the design and construction of the project, particularly focuses...

... 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...

... 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...

... 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...

... 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 vibration is one of the most undesirable effects induced...

... 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, Powai, India...

... 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...

... 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...

... 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...

... 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...

... ground transportation asian rock mechanics symposium 29 configuration rail transportation isrm international symposium shaft base tunnel main tunnel tube emergency station construction tunnel site installation cavern final configuration temporary cavern installation...

... 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...

... 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...

... 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 or reduce...

... 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-Étienne Mining School...

... Reliability Based Robust Support Design for Tunnels in Weak Rock Mass Bhardwaj Pandita* and G. L. Sivakumar Babua a Indian Institute of Science, India * bharadwajp@iisc.ac.in (corresponding author s E-mail) Abstract Support design in tunnels is challenging if the uncertainty in surrounding rock...

... to 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...

.... 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 steel...