• Monthly Newsletter
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• no.32
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• pp.1-4
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• 1990

개정된 회계예규 내용의 의미 - 개정된동일구조물공사및단일공사집행요령 - 어항계획수립의요령[15]

• The Journal of the Convergence on Culture Technology
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• v.10 no.1
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• pp.559-563
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• 2024

Currently, in Korea, large-scale, deep excavations are being carried out adjacent to structures due to overcrowding in urban areas. for adjacent excavations in urban areas, it is very important to ensure the safety of earth retaining structures and underground structures. accordingly, an automated measurement system is being introduced to manage the safety of subway tunnel structures. however, the utilization of automated measurement system results is very low. existing evaluation techniques rely only on the maximum value of measured data, which can overestimate abnormal behavior. accordingly, in this study, a vast amount of automated measurement data was analyzed using the Gaussian probability density function, a technique that can quantitatively evaluate. highly reliable results were derived by applying probabilistic statistical analysis methods to a vast amount of data. therefore, in this study, the safety evaluation of subway tunnel structures due to adjacent excavation work was performed using a technique that can process a large amount of data.

• Journal of the Korea Institute of Building Construction
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• v.20 no.3
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• pp.297-304
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• 2020

Design for Safety(DfS) at the design stage is introduced and executed in order to fundamentally reduce the occurrence of construction safety accidents in Korea. Therefore, in this study, the construction method selected by Design for Safety can reduce safety accidents, but the effects on construction duration and costs were examined to confirm the effectiveness of various aspects. The construction method of the structural frame for the exterior wall cladding of the building, which have the factors for the fall accident, was selected for construction safety and compared and analyzed in terms of construction duration and costs. As a result, it was found to be effective not only in terms of safety, but also in terms of construction duration and costs. Therefore, it is considered that the construction method selected by the Design for Safety at the design stage will have a positive effect on the entire construction project.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.05a
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• pp.324-327
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• 2022

Crack inspection of aged structures is mostly conducted by inspectors using surveying tools on site and visually inspecting them. This method greatly depends on professional worker, and consumes a lot of time and money. An artificial intelligence image classification algorithm is used to make reliable and objective judgments. Since 2018, image augmentation techniques have been used in the image pre-processing stage as they lead to high performance improvement. In this study, an analysis algorithm for cracks in concrete structures was developed using image augmentation techniques, in which the accuracy and speed according to the augmentation ratio were compared and measured for optimization. As a result, it was found that 8 times of image augmentation was appropriate when the accuracy was improved and economic feasibility was taken into account.

• The Journal of Information Technology
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• v.3 no.1
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• pp.1-8
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• 2000

Recently, many large structures have been constructed so it has been occurred small or big problem. One of problems in a safe construction is that behavior of underground is different between design and construction. Therefore, the purposes this study are that set up measuring equiptments in the site of construction and analyze information of measuring data for removing this problem, and measuring data use for similar method of construction in the engineering of ground.

• Journal of the Korea institute for structural maintenance and inspection
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• v.14 no.2
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• pp.106-112
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• 2010

Due to the improvement and stabilization of the social environment, construction market in the urban region is under shrinking. According, researches to lengthen the service life of the existing building structures are under the way through the remodeling or maintenance of deteriorated structures other than the new constructions. Similar situations are widely discussed in the domestic building construction market and the social importance of the remodeling of the existing building structures is increased. Although the structural stability of the building is uncertain due to the frequent repairing and structural changing, the remodeling works are usually conducted. In general, documents such as drawings and calculations for the design of the deteriorated structure to be remodeled are not kept. Accident at the remodeling site frequently occur because of the lack of thorough understanding of changed situations such as loadings, loading paths, changing of the mechanical properties of material, etc. In this paper, using the finite element analysis method, we investigated the structural behaviors of slab in the remodeling building and the results are applied to remodeling construction, and the appropriateness of the remodeling works are evaluated.

• Journal of Korean Tunnelling and Underground Space Association
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• v.23 no.5
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• pp.339-357
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• 2021

As the construction of trans infrastructure using the underground tunnel have been rapidly increased, various nearby excavation of existed underground facility including subway structure has been occurred in urban tunnelling. The concern and worry relating to the safety and stability of the existed facility by nearby excavation is becoming the key issues in urban tunnelling. In this study, it was conducted for existed the subway station structure at Seoul subway line which was closely located in the new Dongbuk urban metro railway to determine the behavior characteristics of station structure according to adjacent tunnel construction. Also, it was reviewed the evaluation of the safety zone and excavation method for subway structure. And after a review of damage evaluation, track irregularities and structural calculation by using a numerical analysis, stability of the subway structure according to nearby tunnel excavation was evaluated to be secured. This study is expected to be applied as useful reference in advance if you need to review the effects of existed structure according to nearby construction in complex urban tunnelling.

• 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.

• Magazine of the Korea Institute for Structural Maintenance and Inspection
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• v.16 no.1
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• pp.37-44
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• 2012

• Magazine of the Korea Institute for Structural Maintenance and Inspection
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• v.19 no.4
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• pp.48-51
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• 2015