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ko
Introduction
- The New Austrian Tunneling Method (NATM) was first introduced by NATR method in the early 1960s by the Ravicewicz, Austria.
- The previous tunnel method requires the support material to bear the load generated by the excavation around the excavation surface, which requires a lot of space between the ground and the support.
- As time goes by, the ground is relaxed, and the heavy load acts on the support, resulting in many ground deformations.
- The basic principle of NATM is to use rock self-supporting force to fix with Rock Bolt and reinforce with Shotcrete and support material to stabilize the ground and excavate tunnel.
- This method is economical compared to the previous method, has the advantage of suppressing the deformation of the surrounding ground due to the excavation, it is mainly used as the construction method of the downtown tunnel because it can determine the safety by continuous measurement.
Special Feature
| The ground itself is the main material. |
| Shotcrete, rock bolts, and steel support are the means of supporting the ground. |
| It can be applied from soft ground to very strong rocks. |
| Measurements are made during construction to reflect design and construction. |
| Economical tunnels can be built. |
Site list
Great Train eXpress(GTX) B Line Section 4
Earth work, Construction of structure
Hyundai E&C Mabuk R&D Center
Disposal Tunnel Excavation & Low-pH Lining
2025
Gwangju Urban Railway Line 2 Phase 1 Section 6 construction work
Earth work, Construction of structure
2024
Highway No. 29 Sejong-Pocheon (Anseong-Yongin) construction (Section 5)
Earth work, Construction of structure
2023
Samsung-Dongtan GTX-A Line Section 3
Lining reinforcement work
2022
Extension of Incheon Subway Line No. 1 to Gumdan (Section 1)
Earth work, Tunnel (Shield TBM)
2021
Samsung-Dongtan GTX-A Line Section 4 (Transfer Center)
Earth work, Construction of structure
2020
Seoul Metropolitan Railway Line 7 Seoknam Extension Section 1 construction work
Earth work, Construction of structure
2020
Samsung-Dongtan GTX-A Line Section 4 (Transfer Center)
Earth work, Bridge construction, Tunnel (NATM) 2,470m
2019
Samsung-Dongtan GTX-A Line Section 4 (Seongnam Station)
Earth work, Construction of structure
2019
Sejong-Pocheon Expressway National Highway Construction (Section 5)
Earth work, Bridge construction 795m, Tunnel (NATM) 5,025m
2018
Gwangyeong-Yeosu Power Cable Tunnels
Earth work, Tunnel (NATM) 283m
2017
Bukdangjin-Shintangjeong Power Cable Tunnels, Dangjin
Earth work, Tunnel (MESSER SHEILD) 283m
2017
Deagok-Sosa Double track subway, [Section no.5]
Earth work, Tunnel (NATM) 1,912m
2017
Seoul Metropolitan Rapid Transit 7-line Seoknam extention (Section No.1) , Bupyeong
Earth work, Tunnel (NATM) 1,389m
2016
Jungang-line , Dodam-Youngcheon 1-B zone, double track subway roadbed project , Danyang
Earth work, Tunnel (NATM) 2,080m
2015
The construction works of the Highway of Guri-Pocheon (Section No. 3) ,Namyangju
Earth work, Bridge construction, Tunnel (NATM) 2,470m
2014
The construction works of the Railway of Wonju-Gangneung (Section No. 2 ) , Uigwan Tunnel , Wonju
Earth work, Tunnel (NATM) 1,550m
2013
The construction works of the Metropolitan Express Railway of Suseo-Pyeongtak (Section No. 1-2), Seoul
Tunnel (NATM) 2,360m, Box Structure 387m
2012