아파트 10동 동시에 폭발시키는 위력인데, 계속된 실패에 결국 공구장님이 터널로 들어가셨다｜인제터널 공사｜극한직업｜#골라듄다큐

※ This video is an excerpt from *Extreme Jobs - Inje Tunnel Construction Parts 1 & 2*, which aired on January 4, 2012. Deep in the mountains at the foot of Mt. Bangtae in Inje-gun, Gangwon-do, the sound of blasting shaking the sky can be heard every day. This is because construction of the Inje Tunnel, which will shorten the travel time from Seoul to Yangyang to just 1 hour and 40 minutes, is in full swing. Part of the Chuncheon-Yangyang Expressway (88.8 km in length), this tunnel, which cuts through Mt. Bangtae and several other mountains of the Baekdudaegan mountain range, is a whopping 11 km long! This is more than double the length of the Jungang Expressway's Jukryeong Tunnel (4.6 km), currently the longest tunnel in Korea, and ranks 11th in the world. Simultaneous excavation in four directions! The Inje Tunnel, boasting a massive scale with four lanes in each direction! Undeterred by the bitter cold of midwinter, we provide in-depth coverage of the Inje Tunnel construction site, where workers are dedicated to 24-hour operations, shedding light on the valuable sweat of those creating a new path. - In the morning, before the twilight has fully lifted, preparations for tunnel excavation are in full swing. For these workers, there is no distinction between day and night, let alone the season. This is because they are deployed under a 24-hour shift system without a single minute of rest to shorten the construction period. —The term "Makjang," a metaphor for extreme conditions, refers to the tunnel where excavation work is taking place.—The faces of the workers, each wearing a thick mask as they enter the "Makjang," are filled with determination. To reduce the construction period, the Inje Tunnel project is excavating simultaneously across eight sections. The excavation method is carried out using explosive blasting. A staggering 300 kg of explosives is loaded at once to destroy hard rock. The shock wave generated at this time is powerful enough to reach speeds of 5,000 meters per second and possesses the force to blast rocks weighing over 20 kg over 100 meters away. It is a dangerous operation that requires extreme caution for even a single blast! The place where workers sweat day and night to excavate just over 3.5 meters is, quite literally, the "face of the mine"! Once the blast is complete, massive tires that far exceed the height of a sturdy adult appear. These are "rough-ground dump trucks," which even construction veterans rarely see. A line of super-large trucks capable of moving a whopping 50 tons follows. The estimated volume of rock excavated upon completing the 22 km round-trip tunneling is 2.6 million cubic meters! As befits a site boasting a world-class scale, the massive heavy equipment mobilized overwhelms that of other construction sites. The quiet face of the mine just before the blast. The tense countdown to the explosion! However, even as silence falls, no loud bang is heard. The explosives have not detonated. Unable to pinpoint the cause, the supervisor eventually decides to enter the tunnel face. 300 kg of explosives are waiting to explode! Since tunnel construction is prone to frequent accidents, reinforcing workers' safety awareness is essential. A ritual praying for safety is performed to guide their mindset as they approach the site. However, accidents, big or small, can occur anywhere; in this instance, the tires of a vehicle heading to the face have collapsed due to sharp rocks. As a single delay affects other operations, the worker repairing the vehicle is even more anxious. Just as important as the excavation itself is reinforcing the roughly damaged surface. This involves shotcrete application, spraying concrete onto the walls, and installing rock bolts to firmly secure the rocks. The high-difficulty task of driving 2-meter rebar into the rock while relying on a crane continues ceaselessly. Just then, the workers on site discover a dangerously protruding crack in the tunnel ceiling... About ten tasks are carried out organically for a single excavation run. However, the excavation range is merely 3.5 meters. These individuals, fighting while enduring twelve hours of grueling labor a day, approach their work solely with a sense of mission to build a ‘new road.’ The completion of the Inje Tunnel is expected to result in an annual reduction of 13,947 tons of carbon dioxide, a saving of 1.3 billion won in logistics costs, the creation of 1.1 million jobs, and an increase in income of 1.9 trillion won. ✔ Program Title: Extreme Jobs - Inje Tunnel Construction Parts 1–2 ✔ Broadcast Date: 2012.01.04