Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Hankyu Yoo"'
Publikováno v:
Applied Sciences, Vol 10, Iss 19, p 6906 (2020)
The non-open-cut method is used for constructing tunnels under existing roads without blocking traffic. Various non-open-cut methods use pipe roofs made of medium- and large-diameter steel pipe piles. However, the risk of ground settlement or heave i
Externí odkaz:
https://doaj.org/article/45b9a43781f34075afa1a0e3186b232d
Autor:
Kyoungyul Kim, Jungjoo Kim, Heehwan Ryu, Hafeezur Rehman, Turab H. Jafri, Hankyu Yoo, Sanggui Ha
Publikováno v:
Applied Sciences, Vol 10, Iss 15, p 5187 (2020)
The utility tunnels used for electricity transmission are in high demand these days. The literature presents many limitations in the currently used cutterhead drive design procedure while using a shield tunnel boring machine (TBM) for the excavation
Externí odkaz:
https://doaj.org/article/48899ba943954c75a7304f09622e5c4d
Publikováno v:
Applied Sciences, Vol 10, Iss 9, p 3285 (2020)
In multi-arch tunnels, the increased rock load on the concrete lining of the main tunnel and side walls due to the excavation of adjacent tunnels is critical and must be considered in the design stage. Therefore, this study estimates the rock load of
Externí odkaz:
https://doaj.org/article/2add7c965dda4f90bc1d5e7c3fbadfc3
Autor:
Haneol Kim, Hafeezur Rehman, Wahid Ali, Abdul Muntaqim Naji, Jung-joo Kim, Jonguk Kim, Hankyu Yoo
Publikováno v:
Applied Sciences, Vol 9, Iss 22, p 4781 (2019)
Empirical classification systems do not provide details of the factors that affect the performance of fully grouted rock bolts, as they are based on average values. Fully grouted rock-bolt patterns during tunnel-support design are a part of the compo
Externí odkaz:
https://doaj.org/article/40225f2579da48d1a36dba81155ca103
Autor:
Abdul Muntaqim Naji, Hafeezur Rehman, Muhammad Zaka Emad, Saeed Ahmad, Jung-joo Kim, Hankyu Yoo
Publikováno v:
Energies, Vol 12, Iss 11, p 2124 (2019)
Rockburst is an unstable failure of a rock mass which is influenced by many factors. During deep excavations, the presence of nearby geological structures such as minor faults, joints, and shear zones increases the likelihood of rockburst occurrence.
Externí odkaz:
https://doaj.org/article/ec80c73047ab457681830c6cf8013c71
Publikováno v:
Applied Sciences, Vol 9, Iss 10, p 2065 (2019)
In extensively used empirical rock-mass classification systems, the rock-mass rating (RMR) and tunneling quality index (Q) system, rock-mass quality, and tunnel span are used for the selection of rock bolt length and spacing and shotcrete thickness.
Externí odkaz:
https://doaj.org/article/fd770ca6fba84320bf46cf8435bc03a6
Publikováno v:
Applied Sciences, Vol 8, Iss 7, p 1101 (2018)
The demand for a net protection system for mitigating debris flow has increased recently for which new energy absorption devices have been hereby developed. The purpose of this study is to analyze the behavior and energy absorption rate of a brake fr
Externí odkaz:
https://doaj.org/article/f99bab6479264234a97ac33c322086ae
Publikováno v:
Energies, Vol 11, Iss 8, p 1935 (2018)
Rockburst is a hazardous phenomenon in deep tunnels influenced by geological structural planes like faults, joints, and shear planes. Small-scale shear-plane-like structures have damaging impact on the boundaries of the tunnel, which act as barrier a
Externí odkaz:
https://doaj.org/article/2ce8b4dab75d41a1b98e1630fccbe2d5
Autor:
Turab H. Jafri, Hankyu Yoo
Publikováno v:
Applied Sciences, Vol 8, Iss 3, p 335 (2018)
Most of the tunnel excavation methods involve the use of explosion and vibration techniques that is not feasible in urban areas due to unavoidable production of noise, vibration, and dust. The environmental considerations of tunneling projects in urb
Externí odkaz:
https://doaj.org/article/5417f8a5e37c44e9a3bd3d6c48114015
Publikováno v:
KSCE Journal of Civil Engineering. 27:53-65
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::559e035a18c9d9f665e3583fec71f8c3
https://doi.org/10.1007/s12205-022-1064-7
https://doi.org/10.1007/s12205-022-1064-7