• Title/Summary/Keyword: building demolition

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Characteristics of Particle Size Distributions Generated in the Vicinity of Building Blasting Demolition Sites (발파해체현장에서 발생하는 순간분진의 입경분포 특성)

  • Lee, Kyoung-Hee;Kim, Hyo-Jin;Park, Chan-Gyu;Ko, Kwang-Baik
    • Journal of Environmental Science International
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    • v.18 no.1
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    • pp.41-47
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    • 2009
  • In building demolition work, major dust-generating activities are blasting concrete and rock. The aim of this study was to find the characteristic of particle size of dusts which were generated during building demolition work using explosion. The DustMate of the Turnkey-Instruments Ltd. was used for particulate size-selective sampling of the four sites. TSP(Total Suspended Particle), PM10(Particle Matter $10{\mu}m$), PM2.5(Particle Matter $2.5{\mu}m$), and PM1.0(Particle Matter $1.0{\mu}m$) were measured during building demolition work using explosion. The large particulate (higher than the diameter $10{\mu}m$) showed to be higher than 50%. The particulate ranged from $10{\mu}m\;to\;2.5{\mu}m$ showed about 30-40%. PM2.5 was not scarcely detected in the samples collected for building demolition work using explosion. We conclude that the dust generated during building demolition work using explosion has not most respirable particulate.

A Study on Applying 3D Automatic Displacement Measurement System for Safety Monitoring of Building Demolition Works (건축물 해체공사 안전 모니터링을 위한 3차원 자동변위계측 시스템 활용 방안 연구)

  • Park, Han-Bin;Han, Hye-Rim;Kim, Taehoon;Cho, Kyuman;Cho, Chang-Geun;Kim, Hyeong-Ki
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2022.11a
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    • pp.229-230
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    • 2022
  • According to the national building status, there are a total of 2.89 million buildings that are over 30 years old after completion, and the number is increasing by more than 70,000 to 80,000 buildings every year. As a result, the demand for demolition works is also increasing, and more than 3 to 4 collapse accidents occur steadily every year during demolition work. Major causes of accidents include non-compliance with plans, negligence of on-site supervisors, and failure to secure structural safety. Due to the strengthening of the Severe Disaster Punishment Act, there is growing interest in the demand for secure management of collapse detection during demolition works. Therefore, this study aims to investigate the applicability of real-time safety monitoring systems using a total station capable of 3D automatic displacement measurement in building demolition work for securing structural safety by the load changes during the demolition process.

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Reasonable Demolition Method Combination of RC Structures (RC구조물의 해체공법 조합방안)

  • Kim, Se-Bum;Yang, Jin-Kook;Lee, Sang-Beom
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2016.05a
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    • pp.177-178
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    • 2016
  • The main structure of the building has been used reinforced concrete construction method in Korea. In recent years, it is necessary to demolition of buildings into urban redevelopment. But yet the demolition method is not being developed perfect. It is necessary to develop future deconstruction for safety and environment method. In this study, we surveyed the demolition method has been used in domestic construction. How the combination of these demolition method should be needed. Demolition method combinations were classified as low-rise, high-rise, middle. It suggested method to combine the demolition process of reinforced concrete structure with seven.

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Evaluation of Safety Items in Building Demolition Works Utilizing AHP Method (AHP 방법론에 의한 건축물 해체공사의 안전관리 개선사항 평가)

  • Cha, Hun-Ju;Choi, Jong-Soo
    • Journal of the Korea Institute of Building Construction
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    • v.7 no.3
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    • pp.99-105
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    • 2007
  • Current domestic safety training in building demolition works are heavily relies on the limited number of experienced people and thus, it implies the demand of preparing the systematic program and stricter yardstick is soaring. Questionnaire survey and in-depth interview results with demolition engineers were analyzed adopting AHP methodology. Analysis results reveal that the most urgent items which required improving current safety training system are to increase investment level, prepare more structured training system and secure experts, and so on. In addition, field labors and managers strongly requested the improvement of environment-related safety matters. Based on the evaluation results, guidelines were suggested for the improvement of safety training system in building demolition works.

Necessity of Improvements on Code of Practice at the Demolition Work considering Building Structure Type : Based on Demolition work of Permission and Registration (건축물의 구조유형을 고려한 해체공사 제도 개선 방안 필요성 - 해체공사의 허가 및 신고를 기준으로 -)

  • Shim, Yukyung;Jeong, Jaewook;Lee, Jaehyun;Jeong, Jaemin
    • Korean Journal of Construction Engineering and Management
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    • v.21 no.6
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    • pp.66-74
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    • 2020
  • To prevent incident of demolition work the Building Management Act was implemented to manage demolition work. According to this law, buildings with the scale upper than 500㎡ of floor area are classified as permission to conduct the demolition work, however it may be hard to perform safety management at demolition work. In addition, the risk level of demolition work is varied with related to the structure type. So, the purpose of this study is to suggest the improvements of criteria on demolition work considering building structure types including small-scale structures such as masonry, wooden, and other structure. The research process was conducted by three steps. (I) Application of Building Management Act; (II) Analysis of demolition work by structure types; and (III) Subdivision of permission targets by building structure types. The result of this study, permission ratio was only 10% for total demolition work and 2.43% for masonry. Because the masonry, wooden, and other structure types are concentrated on a floor area of small-scale, the separate criteria of demolition work is need to prevent the accident and fatal incident. Through the results, the decision maker can be utilized (1) For the special building structure types, the criteria of enhanced safety management are applied by referring to the overseas law ; and (2) The demolition work can be considered by the criteria of separate permission in terms of structure types.

Analysis of Basic Capabilities for Building Demolition Experts - Focused on Domestic and International Cases (건축물 해체공사 전문인력을 위한 기본역량 분석 - 국내·외 사례를 중심으로)

  • Lee, Kyung-Koo;Shin, Yong-Seob;Lee, Hyung-Yong;Chun, Jae-Youl
    • Journal of the Korea Institute of Building Construction
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    • v.23 no.6
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    • pp.841-849
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    • 2023
  • The rising number of accidents during building demolition work has significantly heightened interest in this field. This study undertakes a comprehensive analysis of the essential capabilities required for building demolition experts, drawing on both domestic and international examples. This includes an examination of training courses for building demolition inspectors and the competencies mandated for structural demolition roles as per Korea's National Competency Standards(NCS). Furthermore, the study reviews the qualification tests and training programs for building demolition professionals in the United States, Japan, and England. The research concludes that the expertise needed for demolition construction professionals should be categorized into seven key domains: legal, structural, safety, planning, operational, constructional, and environmental aspects. These competencies are further divided across three professional tiers: technician, engineer, and manager.

The Effect of Chemical Admixtures on Removal of Scattered Dust

  • Son, Ho Jeong;An, Jung Min;Chung, Chul-Woo;Lee, Jae-Yong
    • Journal of the Korea Institute of Building Construction
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    • v.13 no.6
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    • pp.594-601
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    • 2013
  • One of the important problems associated with building demolition is the dust generated during the work. The only way to reduce the demolition dust is to use a dust net during water spraying. However, it is difficult to supply the necessary amount of water to remove demolition dust, thus making it difficult to apply this method on a demolition site. This work attempted to find an alternative approach to dust removal by incorporating surfactant and high range AE water reducer in the water being sprayed. Through the experiment, it was found that the addition of surfactant did not contribute to the removal of demolition dust. However, the use of high range AE water reducer showed better performance than spraying plain water, indicating that some amount of demolition dust had been adsorbed on the high range AE water reducer.

Classification of Explosive Demolition Methods Based on the Building Type and Dimension of Wall-slab Apartment Building (벽식 아파트의 주동 형태 및 규모에 따른 발파해체공법 분류)

  • Park, Hoon;Suk, Chul-Gi
    • Explosives and Blasting
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    • v.27 no.2
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    • pp.19-25
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    • 2009
  • According to increasing demands for a redevelopment of a wall-slab structure apartment, new explosive demolition methods, which are different from those for RC structure apartment, are requested. In this study, to provide basic design data on explosive demolition of wall-slab structure apartment, wall-slab structure apartments were classified according to building types and dimensions. Also adequate explosive demolition methods for wall-slab structure apartment are analyzed by using blasting pattern factors such as height(H), breadth(B) and length(L) of apartment.

A Prospect of Explosives Demolition Based on Comparative Analysis of Demolition Cost. (해체공사비 비교분석을 통한 발파해체 공법의 전망)

  • Cho Tae-Wan
    • Korean Journal of Construction Engineering and Management
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    • v.5 no.4 s.20
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    • pp.130-138
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    • 2004
  • The demolition works of high building in korea are expecting to increase rapidly in the near future, and its general demolition methods can be divided into mechanical demolition method and explosive demolition method. The selection of the right demolition method relies on many variable elements according to environmental and geographical elements. But, generally, the most important element of those is a economical profit. Accordingly, This study estimates each demolition cost dividing into mechanical demolition method and explosive demolition method of high building in city. And the estimating of the demolition cost makes it possible to do comparative analysis for the economical efficiency of each method more objectively than any other selective elements. Also, the analysis for the economical efficiency helps to forecast the activated time of the explosive demolition method in domestic.

Estimation of the Waste Generation in Building Demolition Work using Drone (드론-BIM 기반 건축물 해체공사의 폐기물 발생량 평가)

  • Ryu, Jung Rim;Park, Won-Jun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2021.05a
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    • pp.309-310
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    • 2021
  • In order to respond to environmental problems and to efficiently recycle resources, it is important to evaluate the amount of construction waste generated. In particular, the estimation of the amount of waste generated in the demolition work was performed based on the basic unit of waste generated per floor area. This study proposes a method using drones as a method for evaluating the amount of demolition waste in a wide area. In the simulated application, the field measurement results and the proposed method were compared, and the effectiveness of the building volume calculation using drones was confirmed. It was confirmed that the building volume can be calculated quickly in the additional pilot application.

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