• Title/Summary/Keyword: Mechanized construction

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Analysis on Downtime element of Gripper TBM based on field data (현장 데이터 분석을 통한 Gripper TBM의 Downtime 요소 분석)

  • Park, Jinsoo;Song, Ki-Il
    • Journal of Korean Tunnelling and Underground Space Association
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    • v.23 no.6
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    • pp.393-402
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    • 2021
  • The first TBM introduced in Korea was the gripper TBM, which was applied to the Gudeok Waterway Tunnel in 1985. In the initial stage of the introduction of the gripper TBM, many applications were mainly focused on waterway tunnels (Tunnel Mechanized Construction Design, 2008). Currently, the construction range of gripper TBM in Korea is widely applied to not only waterway tunnels, but also subways, railway tunnels, and TBM+NATM expansion. Overseas, gripper TBM is generally applied, and even when NATM tunnel is applied, it is applied as an exploration tunnel because of the excellent advance rate of gripper TBM and used as an evacuation tunnel after completion. Due to the fast excavation speed, the application of the gripper TBM in the rock section of weathered rock or higher can minimize the environmental and civil complaints caused by creating a large number of work areas when planning long tunnels or mountain tunnels. In this study, the work process of the general gripper TBM was analyzed by analyzing the construction cycle and the gripper TBM with a diameter of 2.6~5.0 m, which was applied the most in Korea. Downtime was investigated and analyzed.

Domestic and Overseas TBM Production Specification and Professional Training Program (국내외 TBM 제작 사양 및 전문인력 양성 프로그램 분석)

  • Kim, Ki-Hwan;Kim, Seong-Cheol;Kang, Si-On;Mun, Cheol-Hwa;Jeong, Yun-Young;Kim, Hyouk
    • Tunnel and Underground Space
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    • v.29 no.5
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    • pp.281-291
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    • 2019
  • In Overseas case, most tunnels in under are or through the river are constructed with shield TBM and the manufacturer orders of related equipment suitable for the project are mode. Accordingly, the client provides the specifications required for the equipment manufacture. In addition, TBM equipment has been operated by those who have completed the expert training program, which for minimizing the risk of equipment operation in construction field corresponding to the mechanized construction. However, in Korea, such a system related to above the program and specifications has not yet been built, which is causing a lot of difficulties in construction field. Therefore, this study investigated the differences in bidding guides provided by mechanized construction in domestic and abroad, and the professional education programs for expert training being conducted from overseas. Futhermore, we will propose the guidelines of essential equipment specification contained in domestic bidding and provide the necessary manual for the professional education program for TBM as the mechanized construction method.

The Verification of Safety Education Contents Using BIM from Construction Workers (현장 노무자를 대상으로 한 BIM 안전교육의 효과 검증)

  • Park, Tae-Hwan;Park, Young-Jun;Kim, Tae-Hui
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2014.11a
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    • pp.102-103
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    • 2014
  • Today, the potential safety risk is increased due to a construction industry is high-rised, mechanized, and complexed. Most workers injured in accident caused by lack of safety awareness. Therefore the safety education is focused in construction site, but it can not get workers' interest and has many problems to reduce construction accident. This study investigated the effects of education used BIM intended for workers in construction site to verify the objective effectiveness in future.

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Measures to Evaluate the Efficiency for Safety Education Contents Using BIM (BIM을 활용한 안전사고 예방교육 내용매체의 효율성 평가 방안)

  • Park, Tae-Hwan;Park, Young-Jun;Kim, Tae-Hui
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2014.05a
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    • pp.40-41
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    • 2014
  • Today, the potential safety risk is increased due to a construction industry is high-rised, mechanized, and complexed. Most workers injured in accident caused by lack of safety awareness. Therefore the safety education is focused in construction site, but it can not get workers' interest and has many problems to reduce construction accident. This study will investigate the effects of education used BIM intended for workers in construction site to verify the objective effectiveness in future.

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Construction of Continuous Bridges in Hi8h-Speed Railway using Precast Span Method (프리캐스트 스팬 공법을 적용한 고속철도 연속교 시공)

  • 김성일;김성호;이원표;윤철수
    • Proceedings of the KSR Conference
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    • 2001.05a
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    • pp.401-407
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    • 2001
  • Out of 412km long Kyung-bu high-speed railway, 302km was designed in tile form of either bridges or tunnels. Most of bridges were designed to be prestressed concrete box girder type. The precast span method was selected because of good quality of bridge section secured by factory manufacturing, fast construction speed, low construction cost with mechanized construction and the safety fur field workers. The precast span method has been mainly utilized in bridges consisted of repeated simple spans. However, we applied the precast span method to continuous bridge for high-speed railway Since it was the first attempt to apply ate precast span method to a continuous bridge for high-speed railway, many design and construction details were studied and implemented in the construction. Design and construction processes of a continuous bridge construction using tile precast span mettled are briefly described in this paper.

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The Construction Quality Comparison and Analysis by Electric Poles Construction Method (건주 시공법에 따른 시공품질 비교 분석)

  • Kim, Jeom-Sik;Kwon, Se-Won;Park, Yong-Beom;Mun, Sung-Won;Jo, Seong-Mun;Kim, Do-Young;Ko, Ji-Hoon
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2009.10a
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    • pp.247-249
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    • 2009
  • Electric pole construction of distribution place is mainly operated by excavation work using auger crane and backhoe. Even though construction quality is affected by electric pole construction method and amount of excavation, construction is operated by workers' convenience in most of construction place. Therefore, in this paper, we analyze and compare effectiveness of electric pole quality using auger crane and backhoe when mechanized excavation through displacement experience of electric pole with ground strength.

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Development of Robot for the Mechanized Construction of Underwater Harbor (수중항만공사 기계화 시공을 위한 로봇 개발)

  • Park, K.W.;Kim, T.S.;Chung, J.W.;Kim, Y.H.;Lee, M.K.
    • Proceedings of the KSME Conference
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    • 2003.11a
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    • pp.1781-1786
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    • 2003
  • This research develops a robot as the device which constructs underwater harbour. This construction is to build a breakwater, which is dangerous and difficult. The hydraulic parallel mechanism-typed robot is developed to mechanize the construction by operating of a stoneworker (or diver) through a joystick. The six-dof robot is able to carry 2-3 tons' heavy stone and put it on the surface of breakwater. This paper presents the mechanical design of a miniature robot, its control and application for the breakwater construction.

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Field Investigation Study of WWF Placing for the Apartment Building Construction (구조용 용접철망을 적용한 아파트 구조물의 시공성에 관한 연구)

  • 안경수;김상연;윤영호;양지수;이리형
    • Proceedings of the Korea Concrete Institute Conference
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    • 1997.04a
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    • pp.657-662
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    • 1997
  • In these day, there have been shortage of construction workers and an increase of labor cost in our county. In order to overcome these problems, prefabricated and mechanized system of bar placing have been used in the construction fields. As a part of this tendency, welded wire fabric(WWF) reinforcement were studied several years ago. In this study, the required working hour. the labor power and the construction process of WWF reinforcement for the apartment building slabs are reported. From the result of field investigations, it is showed that the WWF reinforcement facilitates the field placing and the working time of WWF placing is saved, and then the labor cost of WWF reinforcement is less than that of the conventional bar reinforcement.

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Field Test of Harvesting Mechanization Technology of Onion at Shinan Area (신안 지역에서의 양파 기계 수확 작업체계 실증시험)

  • Sang Hee Lee;Won-Kyung Kim;Jae Won Eo;Sang Bong Lee;Deok Gyu Choi;Seok Ho Park;Youn Koo Kang;Chang Uk Cheon
    • Journal of Drive and Control
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    • v.21 no.3
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    • pp.20-27
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    • 2024
  • This study aimed to evaluate the impact of mechanizing onion harvesting on labor reduction and work efficiency in Shinan Area. The mechanized harvesting system comprised a stem cutter, digging harvester, and collector. The field tests showed that the average residual stem length after using the stem cutter was 13.22±5.01 cm, with a stem cutting ratio of 91.3% and a damage ratio of 0%. The digging harvester achieved a digging ratio of 100% and a damage ratio of 1.2%, while the collector's damage ratio was 4.1%, loss ratio was 2.7%, and debris mixing ratio was 3.2%. The total working capacity of the mechanized system was 2.3 h/10a, significantly reducing 97.2% of labor time compared to manpower. These results indicate that the mechanization of onion harvesting can effectively reduce labor costs and increase work efficiency. Future research should include performance verification in various environments and an economic analysis of the mechanized system.

Construction Equipment Management System Using Information and Communication Technologies (정보통신 기술을 이용한 건설기계 관리시스템)

  • Kim, Sun-Keun;Seo, Jong-Won;Lee, Jun-Bok;Kim, Young-Suk
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • 2006.11a
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    • pp.535-538
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    • 2006
  • The number of registered construction equipment exceeded the 320 thousands in 2005. Construction has been gradually mechanized, reducing the need for construction labors, and increasing the productivity and quality of construction operations. However, it still has some problems that are should be solved for effective operations, management, availability of construction equipment, increased safety of SOC fatalities, and decreased civil appeals in terms of construction equipment. Recently, technology push is accelerated by flowing information and communication technologies(ICT) for construction. In this paper, a construction equipment management system that use ICT is suggested to solve the given problems. It is anticipated that the development of the system would be able to bring the better operations and management of construction equipment.

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