• Title/Summary/Keyword: 표준품셈

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A study on the Composition of the Production Rates System to Prepare Standards for Calculating the Construction Cost of PC Structure Apartments Based on Off-Site Construction (OSC) (OSC 기반 PC구조 공동주택 공사비 산정기준 마련을 위한 품셈 체계 구성에 관한 연구)

  • Lee, Hansoo;Lee, Chiho;Lee, Jeongwook;Noh, Hyunseok
    • Korean Journal of Construction Engineering and Management
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    • v.22 no.6
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    • pp.96-106
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    • 2021

  • The PC structure based on the OSC (Off-Site Construction) is mentioned as a representative method of innovation in the construction industry that converts the existing construction environment from site-centered to factory production-transportation-site assembly. However, recent research on PC method has focused on improving the functions of subsidiary materials and improving the production system to increase productivity and institutional / policy R&D that can be universally applied to the life-cycle stage of ordering / design /construction is insufficient. In particular, the absence of standardized cost calculation standards makes it difficult to calculate and verify of objectified appropriate construction cost. So which is an obstacle to the activation of the PC method. In this study, the standards for construction costs of domestic and foreign PC method were surveyed and similar Construction Standard Production Rates were analyzed to confirm the product structure suitable for PC method. Subsequently, the construction procedures and input resources for each PC subsidiary materials were identified through on-site surveys to derive component for subsidiary materials, and the factors of change in the product according to the construction characteristics(height, weight of subsidiary material) were verified. As a result the standard product calculation system suitable for the site installation of the PC method for apartment was presented.

  • https://doi.org/10.6106/KJCEM.2021.22.6.096 인용 PDF KSCI

A Comparison of Operation Time between the Standard of Estimate and Actual Operations in Tunnel Blasting (터널발파시 실제 작업시간과 품셈의 비교 분석)

  • Kim, Yang-Kyun;Kim, Hyung-Mok
    • Explosives and Blasting
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    • v.33 no.3
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    • pp.14-20
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    • 2015

  • Tunnel blasting that plays the most important role in the construction of a drill & blast tunnel, shows a big difference in operation time according to various factors such as rock mass quality, tunnel dimension, machine performance, and the skill level of tunnel crews. This paper analyzes the differences between the time calculated by the standard of estimate and actual operation time based upon field investigations on blasting operation time in three tunnels of Korea. The result shows that actual blasting time is generally about 8%~16% less than the standard of estimate in cases that normal operations are performed. If the time delayed by unforeseen situations is included, however, it is presumed that the number of cases that actual operation time exceeds the standard of estimate are considerable. This study aims to help make a judgement over the appropriacy of the standard of estimate through continuous investigations on actual operation time, as well as improve the productivity of tunnel excavation.

  • PDF KSCI