※ This video is part of <Extreme Job - Dam Construction 1-2> broadcast on November 4, 2010. The construction site of Buhang Dam in Buhang-myeon, Gimcheon-si. Buhang Dam is a large dam measuring 64m in height, 472m in length, and with a total storage capacity of 54 million㎥, and is currently about 70% complete. It is difficult to even stand still at the 64m high, 35-degree sloped work site. However, not many people know that the work done here is done by hand... ■ Copper plate installation work taking place on a 65m high, 35-degree slope that is dizzying to even stand on Dam construction must be done without any gaps. However, dams are built with walls made of natural stones, gravel, and soil, and the exterior of the walls is covered with concrete. Concrete is prone to cracking due to temperature, wind, and other environmental factors. The copper plate installation work is to minimize these cracks. Copper plates that act as water barriers must be added to the dam’s water barrier at every 1/32nd point. However, they are thin and easily bent, so they must be moved one by one, installed, and welded on site. It is not an easy task because they are being carried out on a 35-degree slope! It is also not easy for them to rest at the copper plate installation site where they hang on ropes for a long time and sparks fly. ■ The work of filling concrete with a uniform thickness of 30cm The most important work of the dam! Concrete pouring. Concrete pouring is the work of spreading concrete evenly on a 472m slope with a uniform thickness of 30cm. Nine workers must evenly spread the concrete coming out of the machine one by one with a trowel, adjusting the work speed. They must be careful when working because even a small hole can form and if the humidity is not maintained consistently, cracks can form and water can leak through the gaps. They spray a film curing agent on the surface where the concrete is laid to prevent water from touching it and take great care to prevent moisture from building up. ■ A dam construction site that operates 24 hours a day without rest! Workers operating a machine called a slit form to pour concrete! Suddenly, the machine stops with a loud noise. Electricity is needed to pour concrete, but the circuit breaker is broken. To make matters worse, even the slit form machine is malfunctioning. In the end, the work site starts again at night. Workers who have to complete the work within a certain period of time are anxious that the work will be delayed and that it might affect the dam construction. This time, the weather is also a problem! The temperature suddenly drops, and even the concrete that has been poured in advance is affected by the temperature, and it starts to heat up before it has time to cool down. Since it is a dam built for the purpose of blocking water, the hardening speed and pouring speed must be constant... If the concrete cools down too quickly, the hardening speed will increase and cracks may form! The workers' sighs grow deeper and deeper. Will they be able to finish pouring the concrete safely? ■ Dam Basic Construction, Reinforcing Work In the past, dams only provided water and electricity to people, but now they also serve as resting places for people. The basic work of a dam is to place rebar on the dam wall... The dam wall must be filled with regular 20cm square intervals to complete a watertight barrier. Reinforcing workers work day and night to tie knots in thick wires and secure rebar by hand in order to complete the work before winter arrives! Their work continues without rest. From welders who hang from ropes and create sparks to plasterers who pour concrete. The dam construction site is built with their hard work and sweat! Extreme Jobs visits the Buhang Dam construction site, which was built over a period of about 6 years with the sweat and hands of countless people and has become a part of our lives. ✔ Program name: Extreme Job - Dam Construction ✔ Broadcast date: 2010.11.04 #Extreme Job #Construction #Construction site #Dam #Architecture #Construction method #Concrete #Industry #Civil engineering #TV documentary