• Title/Summary/Keyword: 발파해체

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Explosive Demolition of Special Structure of Soongeui Complex Stadium (숭의종합운동장 특수구조물 발파해체)

  • Suk, Chul-Gi;Park, Hoon;Kim, Nae-Hoi;Song, Young-Suk;Jung, Woo-Jin;Han, Dong-Hun
    • Explosives and Blasting
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    • v.28 no.2
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    • pp.108-118
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    • 2010
  • Soongeui complex stadium is a reinforced concrete frame structure composed of columns, slabs and beams. The stadium, however, is also a special structure because it has a tall tower of electronic display board and slabs inside its own structure which is different from the structures that had been demolished using blasting by then. Explosive demolition for the stadium was carried out from the left-hand side of the outfield stand to the right considering 2 rows of columns supporting the stand as a blasting unit. An overturning demolition method was applied to the tower of electronic display board. Water bags that played the role of multipurpose protection were applied to control the dust. As a result, the demolition project of the special structure of Soongeui complex stadium was judged to be a great success.

Structural Analysis of the Pre-weakening of a Cylindrical Concrete Silo for the Application of Overturning Explosive Demolition Method (원통형 콘크리트 사일로의 발파해체 전도공법 적용을 위한 사전취약화 구조해석)

  • Choi, Hoon;Kim, Hyo-Jin;Park, Hoon;Yoon, Soon-Jong
    • Explosives and Blasting
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    • v.27 no.2
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    • pp.12-18
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    • 2009
  • Recently, several cases of destruction of old cylindrical silos by explosive demolition method have been reported. This study deals with the subject concerning the pre-weakening of a cylindrical concrete silo for the application of overturning explosive demolition method. In the past, the pre-weakening operation of structure in explosive demolition has been done by use of some empirical methods. These empirical approaches, however, have possibilities of unexpected accidents. In order to provide a guideline for the pre-weakening of cylindrical silos and similar structures, this paper shows the result of a case study, in which the instability of a silo due to pre-weakening is investigated by a numerical structural analysis before actually conducting pre-weakening and demolition operations.

Case Study on the Explosive Demolition of DCRE Incheon Plant (디씨알이 인천공장 발파해체 시공사례)

  • Kim, Sang-Min;Park, Keun-Sun;Kim, Ho-Jun;Kim, Hee-Do;Kim, Gab-Soo;An, Kyung-Ro
    • Explosives and Blasting
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    • v.37 no.1
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    • pp.34-47
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    • 2019
  • This case study is concerned with the project of the explosive demolition for the DCRE Incheon plant located in Hakik district in Incheon city. The building was severely aging due to the high temperature and sea winds of hundreds of degrees emitted by chimney-shaped steel structures inside the building. Due to this, the concrete of the column and the beam fell off and rusted rebar were exposed, and some of the slabs were severely damaged, making it difficult for workers to access the structure. Therefore, it is not possible to apply a mechanical demolition method in which heavy equipment enters the interior of the building, and an explosive demolition method was applied to allow the building to be demolished without dismantling the internal facilities of the building. The order of blasting proceeded in the order of (1) building ${\rightarrow}$ (2) chimney 2 ${\rightarrow}$ (3) chimney 1. A total of 406 electronic detonators (Unitronic 600) was used to sequentially initiate the explosives installed at appropriate in building and chimneys.

A Suggestion for Improving the Demolition Efficiency of Building Structures (구조물 발파 효율 개선 방안)

  • 안명석;최영천;최원규
    • Explosives and Blasting
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    • v.15 no.1
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    • pp.26-35
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    • 1997
  • The research on the safe and efficient demolition technique of building structure is required due to rapid increase in structures which has the problems of safety and endurance. The techniques of blasting and operation and parameters affecting the efficiency of demolition were analyzed to maximize demolition efficiency. And successful, unsuccessful and near-miss demolition cases in Korea have been investigated so that demolition operation can be safe and accurate.

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Application of Advanced Blast Demolition Simulation Method to the Drill and Blast Design for Demolishing Cylindrical Structures (원통형 구조물의 발파해체설계에 대한 최신 발파해체 시뮬레이션 기법의 적용)

  • Park, Hoon;Suk, Chul-Gi;Kim, Seung-Kon
    • Explosives and Blasting
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    • v.26 no.1
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    • pp.7-14
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    • 2008
  • In order to complete successfully the demolition of a silo structure by means of felling method, structural properties and the geometric design of blast mouth have to be considered. In this study, a commercial software, 3-dimensional applied element analysis (3D AEM), was used to investigate the effect of the geometrical parameters of blast mouth on the collapse behavior of the silo structure.

A Study for Felling Impact Vibration Prediction from Blasting Demolition (발파해체시 낙하충격진동 예측에 관한 연구)

  • 임대규;임영기
    • Explosives and Blasting
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    • v.22 no.3
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    • pp.43-55
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    • 2004
  • Use term of tower style construction exceeds recently. Accordingly, according to construction safety diagnosis result, achieve removal or Improvement construction. But when work removal, must shorten shut down time. Therefore, removal method of construction to use blasting demolition of construction is very profitable. Influence construction and equipment by blasting vibration and occurrence vibration caused by felling impact. Is using disadvantageous machine removal method of construction by and economic performance by effect of such vibartion. Therefore, this research studied techniques to forecast vibartion level happened at blasting demolition and vibration reduction techniques by use a scaled model test.

A Study on the Behavior of Blasting Demolition for a Reinforced Concrete Structure Using Sealed Model Test and Particle Flow Analysis (축소모형실험과 입자결합모델 해석을 통한 철근 콘크리트 구조물의 발파해체 거동에 관한 비교 분석)

  • 채희문;전석원
    • Explosives and Blasting
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    • v.22 no.1
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    • pp.33-43
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    • 2004
  • In this study, a comparison was made between the resulting behaviors of scaled model test and particle flow analysis for blasting demolition of a reinforced concrete structure. For the test and analysis, a progressive failure of a five-story structure was considered. The dimension analysis was carried out to properly scale down the real structure into the laboratory size. The test model was made of the mixture of gypsum, sand and water along with soldering lead to analogy reinforcing steel bars. The ratio of mixing components was chosen to best represent the scaled down strength and deformation modulus. The columns and girders of the structure were precasted in the laboratory and assembled right before the blasting test. The numerical analysis of the blasting demolition was carried out using PFC2D (Particle Flow Analysis 2-Dimension by Itasca). The results of the blasting of concrete lahmen structure showed roughly identical demolition behavior between scaled model test and numerical test. For the blasting of the reinforced concrete structure, the results were more identical and closer to the real demolition behavior, since the demolition behavior was better represented in this case due to the increased tensile strength of the component.

A Case Study of Blast Demolition at Chung-Ang Department Store in Daejeon City (대전 중앙데파트 발파해체 사례)

  • Min, Hyung-Dong;Park, Jong-Ho;Song, Young-Suk;Park, Hoon
    • Explosives and Blasting
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    • v.27 no.1
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    • pp.62-78
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    • 2009
  • Recently, construction techniques have been rapidly developed with reconstruction of old buildings, urban regeneration and efforts of restoring natural ecology, so demolition of deteriorated buildings has been rapidly increasing. Demolition work of building should be executed without damaging surrounding environments according to relevant regulations. There are various demolition methods and among them, explosives demolition is the most practical way for expenses and safety of work. As a part of Daejeon stream ecological restoration project, this thesis is a case of executing demolition of Chung-Ang Department Store which was built 35 years ago as covered structure on the upper part of Daejeon stream with explosives demolition. This structure is 8 stories high, total height of 41.6 m including basement floor, $1,650m^2$ for building area and $18,351m^2$ for total floor area. It is located in the center of Daejeon city where shopping centers and buildings are crowded and main facilities are Daejeon subway (18m), backside shopping center (20m), underground shopping center(15m), Mokchuk bridge, Eunjung bridge(0.25m) and fiber-optic cable(0.25m). In this project, implosion was selected for explosives demolition methods by considering this area being a busy urban area, and this project was executed after examining collapse movement of structure in advance using simulation program not to damage main facilities. Total 80kg of explosives and 1,000 detonators were being used. This project will be a good case of executing explosives demolition successfully by applying implosion on urban area in the country.