Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Sean Seungwon Lee"'
Autor:
Min-Seong Kim, Sean Seungwon Lee
Publikováno v:
Underground Space, Vol 16, Iss , Pp 18-28 (2024)
The long and large diameter uncharged hole boring (LLB) method is a cut blasting method that minimizes blast-induced vibrations by creating long and large diameter uncharged holes at the excavation face of tunnels prior to tunnel excavation. Drilling
Externí odkaz:
https://doaj.org/article/0b6f4b765c534dd9b84b82d6835adbdd
Publikováno v:
Applied Sciences, Vol 13, Iss 4, p 2099 (2023)
The long and large-diameter uncharged hole-boring (LLB) method is a cut-blasting method used to reduce vibration induced by blasting. This method typically involves creating an uncharged hole with a 382 mm diameter and drilling 50 m in the tunnel exc
Externí odkaz:
https://doaj.org/article/4ca04620a4f441e3a79fd5db1ed4a470
Autor:
Yo-Hyun Choi, Sean Seungwon Lee
Publikováno v:
Applied Sciences, Vol 12, Iss 14, p 6851 (2022)
During tunnel construction, the ground properties, initially evaluated, are continuously assessed and verified through back analysis. This procedure generally requires many numerical analyses, so a metamodel based on artificial neural networks has be
Externí odkaz:
https://doaj.org/article/6a76d0081bb94cef8bb2262190b607d7
Publikováno v:
Applied Sciences, Vol 11, Iss 24, p 12130 (2021)
The prediction of settlement during tunneling presents multiple challenges, as such settlement is governed by not only the local geology but also construction methods and practices, such as tunnel boring machine (TBM). To avoid undesirable settlement
Externí odkaz:
https://doaj.org/article/bd35a8063f73406bbc9775333832250d
Autor:
Yangkyun Kim, Sean Seungwon Lee
Publikováno v:
Applied Sciences, Vol 11, Iss 21, p 10096 (2021)
This paper analyses the construction time and advance rate of a 3 km long drill and blast tunnel under various geological conditions using an upgraded NTNU drill and blast prediction model. The analysis was carried out for the five types of Korean tu
Externí odkaz:
https://doaj.org/article/070ac50b2fae448ea81c0ee9371e0aea
Autor:
Yo-Hyun Choi, Sean Seungwon Lee
Publikováno v:
Applied Sciences, Vol 11, Iss 16, p 7487 (2021)
Reliable estimates of peak particle velocity (PPV) from blasting-induced vibrations at a construction site play a crucial role in minimizing damage to nearby structures and maximizing blasting efficiency. However, reliably estimating PPV can be chall
Externí odkaz:
https://doaj.org/article/1c50befbf280407b8300d0d90afa85da
Autor:
Min Seong Kim, Sean Seungwon Lee
Publikováno v:
Applied Sciences, Vol 11, Iss 8, p 3490 (2021)
Reinforced concrete (RC) is a widely used construction material around the world. RC has many advantages in terms of structural stability. However, the reinforcement of RC requires extensive labour costs. Steel fibre reinforced concrete (SFRC) has be
Externí odkaz:
https://doaj.org/article/70c982074bc74347b4b5ba3bdd30a248
Autor:
Min Seong Kim, Sean Seungwon Lee
Publikováno v:
Applied Sciences, Vol 11, Iss 4, p 1814 (2021)
Drill and blast is the most cost-effective excavation method for underground construction, however, vibration and noise, induced by blasting, have been consistently reported as problems. Cut blasting has been widely employed to reduce the blast-induc
Externí odkaz:
https://doaj.org/article/66bfcb0b2fca4e1ba6785692a75a4c70
Autor:
Tae Young Ko, Sean Seungwon Lee
Publikováno v:
Applied Sciences, Vol 10, Iss 9, p 3231 (2020)
The abrasiveness of rocks significantly influences the wear endured by excavation tools in tunnel boring machines (TBMs). In slurry shield TBMs, wear occurs not only in excavation tools but also in discharge pipes and pumps of slurry transport system
Externí odkaz:
https://doaj.org/article/d020ffe1985f48e6a2711aa6cc66f560
Autor:
Tae Young Ko, Sean Seungwon Lee
Publikováno v:
Applied Sciences, Vol 10, Iss 6, p 2175 (2020)
Rock fractures in geological conditions are caused not only by applied stress, but also by stress corrosion. Stress corrosion is an environmentally activated chemical process, associated with the fluid-assisted crack growth. Crack growth due to stres
Externí odkaz:
https://doaj.org/article/36a09608e4b9427c8241a8a74f4ad2c3