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Research Achievements

주요연구성과
Titel World Best Construction Technology for Concrete Towers
Manage Structural Engineering Research Instiute Date 2017.08.07 Hit 632

 

 

World-Leading Concrete Tower Construction Technology


Research Supervisor: Young Jin Kim (Senior Research Fellow, yjkim@kict.re.kr)

 

 


■ Overview


The "tapered slip form system" is a system that enables the safe and quick construction of concrete towers up to 400m high, and is a world-leading technique pioneered and developed by the Korea Institute of Civil Engineering and Building Technology.


This system incorporates a high-tech wireless controlling device that can automatically and freely adjust and construct changes in the form of the tower. In addition, GPS and precision sensors are attached so that construction engineers can conveniently check the construction form with precision. The "tapered slip form system" that incorporates these advanced technologies will make it possible to construct towers such as those required for long rail bridges, skyscrapers and power plants in a short period of time, thus contributing greatly to the ability of Korean companies to procure unparalleled competitiveness in the domestic and foreign construction markets.

 

 

 

Tapered slip form construction Digital virtual construction by BIM
▲ Tapered slip form construction ▲ Digital virtual construction by BIM

 

 


■ Background and Need for Research


In addition to tall buildings, long rail bridges also have high beautiful high towers, which can be symbols of a nation’s development. The West Coast Bridge, which was constructed in 2000, also has a tower standing 182m high. Incheon Bridge, which was built in 2009, stands 230.5m high, while the Yi Sun Shin Bridge that was constructed in 2013 has a 270m tower. To safely construct this type of concrete tower, a number of advanced technologies are needed. Concrete and steel beam works must be continued at very high positions, requiring the adjustment of slip forms, and thus involving highly experienced technicians. However, as this technology does not exist in Korea, huge royalties needed to be paid on the use of imported technologies. This made it impossible to construct long rail bridges on our own, and led to a dependence on foreign technicians.

 

 


■ Research Contents

This tapered slip form system includes five advanced technologies such as 3D BIM design and production technologies, light-weight module GFRP mold technologies, slip form optimal time improvement technologies, slip form tapering automation technologies, and GPS-based construction precision and form management technologies. First, the BIM design and production technologies made the tapered slip form system, which is a complex mechanical structure, able to incorporate accurate designs and to reduce production time through 3D design and digital virtual simulations. Second, by applying a GFRP mold, loss in concrete quality due to the temperature drop in the winter was prevented. Third, ultrasonic waves were generated on the concrete surface inside the mold to identify the solidity level of the concrete in order to improve the slip form system at the optimal time. Fourth, in past systems, the tower cross-section had to be changed manually, but by attaching an electrically powered tapered device, it became possible to remotely control all of them simultaneously. Finally, GPS and precision sensors were attached so that the precise form of the tower could be identified remotely, even in climate conditions with a poor visual range.

 

 

Form management system through GPS and advanced IT technologies
▲ Form management system through GPS and advanced IT technologies

 

 

 

■ Research Achievements

In this study, world-leading construction technologies for concrete towers were developed. These were designated as new construction technologies and new K-Water technologies, and thus have been able to earn technology fee income through industrial property rights and technology transfers.

 

● Completed 3 cases of technology transfers

Contents of Technology Transfer

Fixed Technology Fee

Ordinary Technology Fee

Transfer Company

Slip Form System and Construction Technology for Tapered Concrete Tower Construction

20 million won

2%

Cheongjin Construction

Slip Form System and Construction Technology for Tapered Concrete Tower Construction

20 million won

2%

Kumho Industrial

Laser Vertical Machine Monitoring Technique using Photography

2 million won

-

Kaisen

 

● Registered new tapered slip form system construction technology (Sep '15)
● K-Water new technology adopted for tapered slip form system (Dec '15)
● 2016 KICT global leading technology (GLT) adopted (Aug ‘16)
● Test construction completed 4 times (KICT)
● 4 theses published in Korea, 9 published abroad
● 10 patents registered in Korea, 1 patent registered in the US

 

 

Ultrasonic wave concrete intensity measurement device Automated cross-section change device
▲ Ultrasonic wave concrete intensity measurement device ▲ Automated cross-section change device

 

 

■ Expected Effects

The platform technologies for tapered slip form construction methods, a key technology for reducing construction time while ensuring safety in concrete tower construction such as for long rail bridges, skyscrapers and power plants, were developed for the first time in Korea. The developed tapered slip form system was the first to be proprietarily developed in Korea, but it combines improved design technologies and IT technologies, and thus achieves a higher level of technology than comparative foreign technologies. This technology significantly reduces the works carried out at high altitudes, greatly enhancing safety, and is also expected to enable more than double the construction speed.

Based on this, the loss of additional values such as technology fees being paid abroad can be prevented. Furthermore, it is expected that it will make it possible to independently carry out concrete tower construction for overseas skyscraper, bridge and power plant projects, and thus will contribute greatly to procuring competitiveness for domestic companies, enabling them to win orders.

 

 

 

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