• Title/Summary/Keyword: IT in Construction

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Revisions on the payline for overbreak in Tunnel

  • Park, T.;Ahn, B.;Baek, S.;Tae, Y.
    • International conference on construction engineering and project management
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    • 2015.10a
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    • pp.714-715
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    • 2015
  • Drill and blast method has been most widely used in tunnel excavation, after NATM (New Austrian Tunneling Method) was introduced in 1983. The NATM method utilized mass of shotcrete to secure the bearing capacity of tunnels. Overbreak defined how much larger the actual excavation was than the planned. When it became larger, more shotcrete was required to fill in it Here, payline fixed allowable overbreak, referring to payable amounts of shotcrete. Since owner was not responsible for shotcrete exceeding payline, it was important to properly establish the standards for payline. Although the standards were provided in 'Poom-sam'(standardized quantity per unit), they did not properly reflect the actual conditions for excavation. Thus, this study reviewed existing domestic and foreign standards for overbreak, and estimated overbreak for each type of support using survey data, and finally provided the improvements on the current standards.

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A Case Study on Value Improvement through applying VE Method in Stage of Railway Construction (시공 VE기법을 적용한 철도구조물의 가치향상 사례 연구)

  • Cho, Ki-Yon;Park, Mi-Yun;Kim, Sung-Hun;Seo, Jong-Won
    • Proceedings of the KSR Conference
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    • 2008.11b
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    • pp.23-29
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    • 2008
  • Most VE operation related to construction project is progressed in stage of planing or design phase, especially in case of domestic. It is encouraging fact and if you have VE process in stage of planning and design, you'll have experience a reduction of about 70% of total saving cost in which total construction process may occurred. However, recently the work of construction in overseas increase and almost is only construction-work, except planning and design process. As this reason, VE process for construction-work phase only is demanded in high necessity. VE in construction phase comes to accomplish intensively in the part which the design change does not follow, through know-how, equipment operating method and method of temporary-structure erection at the established construction-site learned, builders will be the possibility of reduction from 3% to 10% in constructive expense. This paper describes VE performing example in OO company's construction-work phase, and propose the methodology of VE performance in the phase of construction. And also it is aimed to extending VE applications into the overseas construction enterprise.

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A Study On Development of Safety Inspection Evaluation Method in the Construction Using PSM Method (PSM 제도를 활용한 건설업 안전점검 평가방법 개발에 관한 연구)

  • 양광모;전현정;강경식
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.26 no.3
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    • pp.24-30
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    • 2003
  • As domestic buildings have been large-scaled, diversified and high-rise, there have been a consistent demand for design, development of construction technology and accident prevention activity as well as quality enhancement. In spite of governmental and related institutions' efforts for reducing national losses which come from numerous accidents, there have been endless small and large accidents on the construction site and thus, it is urgent to conduct empirical researches in this area. Currently safety supervision system in construction industry has enforced harm and danger prevention planning system, however it merely stick to other existing materials. In addition, it is difficult to put it into practice in that it requires bearing too much burden to draw out the planning itself in a case of large construction work. Consequently in this paper we select evaluation criteria by construction progress, classify into several categories, and regard potential danger which often occurs, as a evaluation criterion. Further step is to allow workers or collaborated companies to express their expert opinions or experiences and to encourage quality and process control and autonomous safety control by applying PSM(Process Safety Management) method using AHP(Analytic Hierarchy Process) and to development of PSM evaluation method in the construction. The reason why PSM method should be quantitative and substantial progress is because it contributes Korean constructing companies to enhancing their safety control ability and to taking an equal stance just like developed countries, thereby strengthening their competitive edges. Boost of safety control system by PSM method could make an enormous contribution to preventing construction accidents on the site by establishing and securing an autonomous safety control system.

A Study on the Standard Management spectrum for the Cut Slope (건설공사 비탈면 유지관리에 관한 연구)

  • Shin, Kwan-Young;Kim, Yong-Soo;Chang, Buhm-Soo;Shin, Chang-Gun
    • Proceedings of the Korean Geotechical Society Conference
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    • 2005.03a
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    • pp.781-787
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    • 2005
  • Recently, disaster that is earthquake, sever rainstorm and the tidal wave were increased by abnormal weather. These influence which is the slope stability of the completed slope as well as under construction slope is affected by disaster. But the management standard for the construction slope is incomplete. Also, the standard connected with construction slope is not integrated with the important public paper organic enemy and it is duplicated and the standards which conflict are being scattered. In this research which it sees consequently the inside and outside of the country construction slope the maintenance civil official relation law and standard investigation it leads and the problem point and a improvement program of management criterion and to sleep the construction slope which is suitable in domestic actuality it prepares and propose.

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A Study on the Perception of Construction Workers on the Key Safety Provisions of the Serious Disaster Punishment Act (중대재해처벌법 핵심 안전조항에 대한 건설업 종사자의 인식 고찰)

  • Jae-Min, Kim
    • Journal of the Korea Safety Management & Science
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    • v.24 no.4
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    • pp.71-83
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    • 2022
  • This study is to investigate the degree of field awareness of how each provision of the Serious Disaster Punishment Act will affect accident prevention. As a result of conducting a survey of construction site workers, it was analyzed that construction site workers had a low sense of safety and did not voluntarily engage in safety activities. And it can be seen that they are taking a very passive position that it is efficient to implement safety under the supervision of the supervisor. Workers who need voluntary construction site safety activities are most aware of the situation at the site, but the problem was pointed out as "lack of procedures for listening to opinions and preparing improvement measures" for these problems. Future research is needed to see if this is a problem for individual workers or for those in charge of safety and health who do not correct it even though active opinions have been submitted.

Improvement Plan for Connecting Form of PC Member -Focused on Apartment Buildings- (PC부재의 접합부 거푸집의 개선방안 연구 -공동주택을 중심으로-)

  • Kim, Seon-Hyung;Choi, Jae-Hwi;Kim, Sun-Kuk;Lee, Dong-Hoon
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2010.05a
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    • pp.9-12
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    • 2010
  • Conventional apartment building projects have favored wall slab structure for the ease of construction and economic viability. However, wall slab structure, consisting of bearing walls, makes remodeling a difficult challenge. In addition, as the amendment to the Building Act in November, 2005 incentivized easy-to-remodel Rahmen structure design for apartment building in terms of floor area ratio and the number of stories, were are seeing more use of PC construct method in apartment building projects gradually. However, PC construction method requires complex connections between beams and columns, making it difficult to install and remove formwork. Furthermore, it is not possible to reuse forms after removal, generating lots of construction wastes, and it is necessary to install new forms again when the size of connection changes in line with modification of column cross-section. Researchers in Korea and elsewhere in the world have focused on structural performance of connection in PC construction method, with little attention to alternative approaches to improving connection forms for PC construction method. Accordingly, this research aims to study an approach to improving connection forms for PC construction method.

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Research on the use of BIM for smart construction of Complex Geometry buildings (비정형 건축물의 스마트건설을 위한 BIM 활용에 대한 연구 - 세종포천선 처인휴게소 시공사례)

  • Park, Yang-Heum;Nam, Dong-Hun;Kim, Byung-Soo;Park, Jungjoon;Kim, Sungjin
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2023.11a
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    • pp.53-54
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    • 2023
  • Because irregular shaped buildings are designed with various three-dimensional curves, the difficulty of design and construction is very high, and more construction drawings are needed to reduce construction errors. General 2D drawings may have limitations in conveying the information necessary for construction. By utilizing BIM, it is possible to three-dimensionally design parts that are not expressed on 2D drawings and additional structurall components required for the construction of the curved exterior finishing materials. This study examines the necessity of BIM at the construction stage, its performance through it, and how it can be linked to smart construction technology through construction BIM being applied to the new construction site of Sejong-Pocheon Line Cheoin Rest Area.

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Development of manual framework for unit modular construction method (유닛모듈러 공법의 시공매뉴얼 체계 개발)

  • Kim, Kyoon-tai;Kim, Tae-Yeong;Jun, Young-Hun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2015.11a
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    • pp.198-199
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    • 2015
  • In Korea, it raised the need of the specification of unit modular construction, because there are no standard or manual. And it is urgent that the specification of unit modular construction is needed to develop in the domestic. Therefore, this study aims to propose the manual framework of the construction method. In the future, this framework will be based on the development of the manual on the unit modular construction method.

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A Case Study On The Suitability Of Drawings Through Application Of BIM In Construction Management (건설사업관리 분야에서 BIM적용을 통한 도서의 적합성 검토 사례)

  • Park, Young-Jin;Song, Kyung-Chul
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2017.05a
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    • pp.33-34
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    • 2017
  • The purpose of this case study is to reduce the flaw and reconstruction occur at the level of construction by determining the propriety of estimate and error on a drawing and specification at working design level through case studies of BIM application at the level of design review. As a preliminary to apply BIM technology, it is needed to review the drawing, and then it is required to define BIM range by selecting the section in which construction error occurs frequently except for the type of part that is constructed repeatedly. At the execution level, the drawing is reviewed vertically, horizontally and spatially by proceeding structure and finish modeling on the defined BIM range, and also the propriety of estimate and error on the drawing and specification are examined. We aim to raise the completion rate, improve quality of construction, reduce the cost for construction and shorten period of construction by preparing for the error on the drawing and specification in advance through this review procedures.

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Productivity Improvement Method of Wall Rebar Work in Apartment House Construction (공동주택 벽 철근 조립 생산성 향상 방안에 관한 연구)

  • Kim, Min-Kyu;Kim, Young-Kil;Kim, Gwang-Hee
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2019.05a
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    • pp.159-160
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    • 2019
  • Reinforced concrete construction is one of the labor intensive construction projects and its productivity is very low. It is necessary to increase the productivity of rebar construction for improving the productivity of construction work. Therefore, in this study, the rebar drawings of apartment buildings are analyzed to prefabricate wall rebar unit shaped mesh in the factory and installing it on site. If the proposed wall rebar unit is applied to apartment construction working time of wall rebar can be reduced by 50% or more.

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