• Title/Summary/Keyword: construction badness

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A Case study on the construction badness for slope reinforcement (사면보강공법 시공불량사례 검토를 통한 개선방안 연구)

  • Kwon, Sung-Ju;Kim, Yong-Soo;Chang, Bum-Soo;Nah, Kwang-Hee
    • Proceedings of the Korean Geotechical Society Conference
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    • 2005.03a
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    • pp.739-744
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    • 2005
  • The construction road work are increasing now. And the domestic slope construction are steadily increased and changed the complicated and large-scale. Therefore ground reinforcement for slope stabilization has been increasingly used during the past few decades with a wide variety of techniques including soil nailing, rock bolt, anchor and different types. But in some cases which applied slope reinforcement construction by badness or mistake. So this paper is the study of construction badness for slope reinforcement.

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A Study on Electrical Accident of Distributing Cable Termination with Simulated Badness Construction (평가시공불량을 모의한 배전급 케이블 종단부의 전기적 사고 연구)

  • Choi, Jae-Hyeong;Choi, Jin-Wook;Kim, Sang-Hyun;Kim, Young-Seok;Kim, Sun-Gu;Baek, Seung-Myeong
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
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    • 2008.11a
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    • pp.465-470
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    • 2008
  • This paper introduces experimental investigates of an electrical accident of the distributing cable termination with simulated badness construction. We prepared two termination kites, one is built-up type, the other is heat contraction type. Also, we manufactured cable termination that have simulated defect by badness construction and measured their insulation characteristics such as ac (35kV, 1min) and impulse (95kV, $1.2{\times}50{\mu}s$) withstand test. The influence of defects such as thickness and the gap between stress-con of housing and semi-conductor on insulating properties of the termination have been studied. The thickness decrease of insulator decreases ac breakdown strength. Dielectric breakdown traces of insulator that is damaged by knife displayed other shape. The gap of between housing and semiconductor deteriorates dielectric strength of insulator seriously.

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Investigation on Adhesion Properties of Sandwich Composite Structures Considering on Surface Treatments

  • Park, Gwanglim;Oh, Kyungwon;Kong, Changduk;Park, Hyunbum
    • International Journal of Aerospace System Engineering
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    • v.1 no.1
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    • pp.16-20
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    • 2014
  • Recently, various kinds of study on light weight structure are performing in the world. The Al honeycomb sandwich structural type adopt for improvement of lightness and structural stability to major part structure of aircraft or spacecraft. Adhesion badness properties of adhesive and adhesion properties of fillet mainly studied about al honeycomb structure. But study for adhesive properties of sandwich construction with surface treatment of Aluminum alloy barely performed. In this study, adhesive film was used between Al and honeycomb core of honeycomb panel[1]. The study for adhesive properties of sandwich construction with surface treatment of AA 5052 skin was performed.

A Study on Verification Test of T-MAT Type Expansion Joint for Railway Bridge (철도교량용 T-MAT형 신축이음장치 완제품 성능시험에 관한 연구)

  • Yoo Moon Sig;Woo Yoon Soo;Kim Hyun Mook;Choi Jong Moon;Yoon Tae Yang;Lee An Ho
    • Proceedings of the KSR Conference
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    • 2003.10b
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    • pp.552-556
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    • 2003
  • Expansion joint is the absorbing structure when the upper structure of bridge have the drying shrinkage and creep from the change of temperature or construction badness. Because it has the fatigue from continuous vehicles traffic. the durability and performance is verified by the static and dynamic loading test In this study. we make the decision that T-MAT type expansion joint is applied in railway bridge and the expansion joint was tested by the criterion of Korea High Speed Rail Construction Authority.

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An Instrumentation System Design for Electrical Accident Prevention of 3-Phase Electrical Control Panel (3상 전기제어반 전기사고 예방을 위한 계측시스템 설계)

  • Kwak, D.K.;Choi, J.K.;Kim, J.J.;Kwon, Y.J.;Song, G.
    • Proceedings of the KIPE Conference
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    • 2016.07a
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    • pp.36-37
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    • 2016
  • The main cause of electrical fires are caused due to short circuit and open circuit. This is generates an instantaneous electric arc or spark accompanied with such electric faults. These arcs generate a pressed wire, contact badness, and a weakness in the wire coating etc.. This research proposes a protection circuit to prevent open-phase accident due to contact failure of electromagnetic contactor, tracking arc fault, open-phase within the three-phase electrical control panel which is the most commonly applied in the industry. The proposed circuit also alarms and cuts off of power system when electrical faults occurs. In addition, the proposed circuit is validated by various electric accident simulator.

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A Study on the Constructing Database and Its Utilization Direction of Old Building using GIS (GIS를 이용한 노후건축물 DB구축과 활용방안에 관한 연구)

  • Kim, Heung-Kwan
    • Journal of the Korean Association of Geographic Information Studies
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    • v.11 no.4
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    • pp.172-181
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    • 2008
  • Life of building repeats removal and new construction continuously because it is limited like living things. But, because the physical standard is subjective and abstract, saying too much is not even though it had been influenced by policy decision of the government. To solve these problem clear data about superannuation degree of building after construction accordingly decision relationship necessity continuously rise. To above background, this study on the Constructing Database Based and Improvement of Old Building using GIS in Busan. The results are as following. First, presented necessity of knowledge information gap mitigation. Second, present Busan's ordinance detailed Contents of old-badness building and production-consequences.

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Electrical Properties of XLPE Cable Termination using Thermal Contraction Type (열수축형을 이용한 XLPE케이블 종단부의 전기적 특성)

  • Baek, Seung-Myeong;Choi, Jae-Hyeong;Choi, Jin-Wook;Kim, Sang-Hyun;Kim, Yeong-Seok;Kim, Seon-Gu
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2009.06a
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    • pp.395-396
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    • 2009
  • For investigation of electrical properties of XLPE cable termination, we prepared a thermal contraction type kit and 6.6kV XLPE cable. The cable termination that have simulated defect by badness construction have been manufactured and their insulation characteristics such as ac and impulse withstand test have been measured. The influence of defects such as thickness decrease and heating time have been studied. When thickness decreased 1mm, the decreased of AC breakdown voltage value is not very distinctive. However, when thickness decreased 2mm, the insulation AC breakdown voltage value was very low down to 43kV. When approved heat for 300s than 60s, AC Breakdown voltage value appeared high. And also, after insulation breakdown took place, the sample was observed before and after disassembly, and the insulation breakdown hole was observed by means of optical microscope.

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A technical study on mold construction development for junction improvement and productivity improvement of Double-Injection molding (이중사출의 접합성 개선 및 생산성향상을 위한 금형구조 개발기술연구)

  • Kim, O.R.;Lee, S.Y.;Kim, Y.K.;Woo, C.K.;Han, I.Y.
    • Design & Manufacturing
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    • v.2 no.6
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    • pp.49-55
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    • 2008
  • Double-injection molding can inject two different materials or two colors in the same mold and process. If this injection process use, product has ability because the base part maintain strength and specified part can inject soft-material. It makes the cost down by single operation automatically for saving wages. In this paper, we designed double-injection mold for automobile remote control to inject secondary using this part as insert after inject external appearance of product. CAE analysis was progressed gate location and runner size as variable and analysis result is reflected in mold design process. As a result, it could solved badness that is generated at the conventional mold. Additionally, cost is downed by reducing loss of runner as well as could omit painting process because surface of finished product is improved through new mold.

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The Development of Corrosion Standard System of Water and Wastewater in Soil Environment (상·하수도 배관재의 토양환경에서의 부식표준시스템 개발)

  • Park, Kyeong-Dong;Shin, Yeong-Jin;Lee, Ju-Yeong
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.5 no.4
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    • pp.7-12
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    • 2006
  • Galvanized steel pipe, copper pipe and stainless steel pipe, which is being used in waterworks piping materials. In case of galvanized steel pipe, the precipitation of a product is being generated due to the pollution of the tap water, a white water phenomenon, and various corrosion reaction because a zinc ion is melted by tap water. And in case of a cupper pipe, many problems which is harm in sanitation appeared because of a inflow of harmfulness substance by a frequent accident of a water leakage. So, to prevent these problems, it is substituted for stainless steel pipe. However, those problems is still occurring because of badness of welding, a problem of a water leakage in connection part, and a increment of construction expenses. Therefore, this research has examined the laying period according to each piping thickness and a corrosion shape according to each laying depth after laying in various soils(sandy loam, loamy, clay loam, clay) using galvanized steel pipe, copper pipe, and stainless steel pipe. That is, we has studied the data which is necessary for a rational method of preserving the quality of water by examining the corrosion properties of piping materials in the soil environment which waterworks piping materials is being used.

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Design and Construction of Data Monitoring System for Stable Cinder Reuse (안정적인 소각재 재활용을 위한 데이터 모니터링 시스템 설계 및 구축)

  • Kim, Gui-Jung;Han, Jung-Soo
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.8 no.5
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    • pp.1082-1086
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    • 2007
  • This research has a purpose of constructing the data monitoring system that makes two-tier work state in the brick production factory to unification by reusing cinder. Monitoring system automatically manages data by using data managing processes such as a state managing process, a location managing process, a badness managing process, a circumstances managing process. In this research, the data management monitoring system manufactures state information of each processes received from RFID and transmits them to data monitoring system. Analyzed data through this system reuses the cinder, so it can effectively manage the production process of the factory which produces bricks through processing automation, faulty-ratio minimization, real-time monitoring and loading managing.

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