• Title/Summary/Keyword: Interlocking Condition

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Manufacture and Characterization of Interlocking Block Using Incineration Ash of Dyeing Wastewater Treatment Sludge (염색슬러지 연소재를 이용한 보도블록의 제작과 물성평가)

  • 권기홍;임우성
    • Journal of Environmental Health Sciences
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    • v.30 no.2
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    • pp.167-172
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    • 2004
  • In this study, we carried out the research for the recycling potential of the dyeing wastewater treatment sludges as construction materials. The incineration ash of sludges were solidified as interlocking block in condition of sludge/cement ratio 2.5%, 5.0% and 10%, respectively. Those interlocking blocks were cured for 3days, 7days and 28days in ambient air condition, respectively. The results of this research were summarized as follows: The dyeing wastewater treatment sludges was below the Korea Leaching Limit. After incineration, the ash was manufactured as interlocking block. Bendable strength over 50kg$_{f}$/$\textrm{cm}^2$ suitable for interlocking block was obtained only when the sample was cured for 7days at sludge/cement ratio 2.5% and 5.0%. Hygroscopic ratio of interlocking block was above the Korea Industry Standard. We think that recycling of the incineration ash from dyeing wastewater treatment sludges to interlocking block will have high potential possibility.y.

Performance Evaluation of Interlocking Block Pavement for Low Speed Highway (인터로킹 블록포장의 저속도로 적용성 평가)

  • Lin, Wuguang;Ryu, SungWoo;Lee, ByeongTae;Cho, Yoon-Ho
    • International Journal of Highway Engineering
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    • v.16 no.2
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    • pp.1-9
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    • 2014
  • PURPOSES : This study aims to evaluate the performance of interlocking block pavement system for low speed highway. METHODS : Through on-site monitoring, environmental impact assessment of interlocking block pavement such as heat island reduction, traffic safety, noise pollution were evaluated as compared with asphalt pavement. Also the pavement condition and roughness were evaluated according to performance period. RESULTS : Surface temperature of interlocking block pavement was about 7 degree lower than asphalt pavement in midsummer. Compared to asphalt pavement, vehicle speed reduction effect of interlocking block pavement was about 2kph. For low speed driving, the noise pollution was measured at a similar level for both asphalt and interlocking block pavement. After 42month service period, the breakage of block was only 0.24% for the whole surveyed area. IRI of interlock block pavement was estimated within the range of 5~8m/km. CONCLUSIONS : Depending on the performance monitoring results such as heat island reduction, providing traffic safety and keeping a good pavement condition for a long service period, it assures that interlocking block pavement was applicable for low speed road.

Structural Damage Monitoring of Harbor Caissons with Interlocking Condition

  • Huynh, Thanh-Canh;Lee, So-Young;Nguyen, Khac-Duy;Kim, Jeong-Tae
    • Journal of the Korean Society for Nondestructive Testing
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    • v.32 no.6
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    • pp.678-685
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    • 2012
  • The objective of this study is to monitor the health status of harbor caissons which have potential foundation damage. To obtain the objective, the following approaches are performed. Firstly, a structural damage monitoring(SDM) method is designed for interlocked multiple-caisson structures. The SDM method utilizes the change in modal strain energy to monitor the foundation damage in a target caisson unit. Secondly, a finite element model of a caisson system which consists of three caisson units is established to verify the feasibility of the proposed method. In the finite element simulation, the caisson units are constrained each other by shear-key connections. The health status of the caisson system against various levels of foundation damage is monitored by measuring relative modal displacements between the adjacent caissons.

A Study on the Design of Railway Electornic Interlocking Software Based on Real-Time Object-Oriented Modeling Technique (ROOM기법을 이용한 전자연동 소프트웨어 설계에 관한 연구)

  • Kim, Jong-Sun;Yoo, Ji-Yoon
    • The Transactions of the Korean Institute of Electrical Engineers D
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    • v.50 no.9
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    • pp.439-446
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    • 2001
  • This paper considers the design technique of the real-time control algorithm to implement the electronic interlocking system which is the most important station control system in railway signal field. The proposed technique consists of the structure design and the detail design which are based on the ROOM(Real-Time Object-Oriented Modeling). The structure design is designed with a modeling using the heuristic search technique which, at first, catch and make out the specific requested condition, and then, is designed on the requested condition. The detail design can be implemented if it may get the satisfying values through the repetitive modeling after comparing and examining the data obtained from the structure design in order for the more reliable and accurate system to be implemented. The technique proposed in this paper is implemented with C++ language which is easy to be transferred and compatible with the existing interfaces, and also the operating system is designed and simulated on the VRTX which is a real-time operating system. This proposed technique is applied to the typical station model in order to prove the validity as verifying the performance of the modeled station.

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Automation Program for Drawing and Examination of Locking Sheet (연동도표 작성 및 검토 자동화 프로그램)

  • Chang, Seung-Ho;Yoo, Keun-Su;Han, Chang-Woo;Lee, Young-Soo
    • Proceedings of the KSR Conference
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    • 2008.11b
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    • pp.1285-1293
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    • 2008
  • Locking sheet is to display the contents of interlocking equipment for safe train drive in stations. It is being used as a basic information for interlocking equipment and for route control condition and the discussion for train operation between related parties. In spite of importance of this, there was no other way except depending on the work by hands from each stage(drawing, examination, discussion, approval) due to non-existing any tool. It is written it takes 30days from drawing to approval by procedures. However, it is required over the days in real time due to argument of each party. Furthermore on drawing of locking sheet, special conditions applied in accordance with situations of each station occasionally are different depending on the person in charge. Therefore, it is urgent to make up Logic Tree to accept special conditions of all stations. Automation Program for Drawing and Examination of Locking Sheet is to improve inefficient interlocking operation which was operated by hands in accordance with custom as automated system. The target of this program is to minimize the processing time and potential errors by personal work and set up standards for Logic Tree of special condition.

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A Study on the Performance Evaluation and the Improvement of the Quality Stand ard of Block Pavements (블록포장의 공용성 평가 및 품질기준개선 연구)

  • Jung, Jong-Suk;Park, Yong-Boo;Lee, Kyoung-Hee;Hwang, Chang-Kyu
    • International Journal of Highway Engineering
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    • v.10 no.2
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    • pp.115-124
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    • 2008
  • This Study was investigated in main breakage types of 50 interlocking block pavements in apartment houses and evaluated on their performance. According to performance evaluation, maintenance control index of 9 aged interlocking block pavements ranged 7.9 to 8.9. These values meant that the condition of interlocking block pavements were still good. Therefore, it was concluded that the 10-year cycle of the block replacement recommended by Ministry of Construction & Transportation is necessary to reappraise. To objectively evaluate the performance of interlocking block pavements, this study presented the criteria of maintenance control by combining two maintenance control standards suggested by Ministry of Construction & Transportation and the Japan Interlocking Block Pavement Engineering Association. Also, this study suggested that the domestic standard is necessary to include durability standards and quality standards of joint filling materials and bedding sand layer for increasing expectation life and reducing maintenance costs of interlocking block pavements.

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Present Condition and View of Electronic Interlocking System for Signaling System Implementation on Train (신호설비구현을 위한 전자연동장치의 현황과 전망)

  • Lee, Jung-Geun;Lee, Hyang-Beom
    • 한국정보통신설비학회:학술대회논문집
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    • 2007.08a
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    • pp.361-365
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    • 2007
  • 전자연동장치(Interlocking System)는 열차의 안전운행 확보와 함께 수송능력과 보호향상, 정확하고 신속한 운송과 더불어 이용률을 증대하는데 중요한 역할을 한다. 철도 신호보안 설비 중에서 그 핵심을 이루는 연동장치 설비에 첨단기술인 전자, 정보처리 및 정보전송기술을 철도 신호 시스템에 도입하여 신뢰성과 안정성이 확보된 신호설비를 구현하기 위해 최근에는 마이크로프로세서를 이용한 전자연동장치 기술이 개발되었다. 본 논문에서는 전자연동장치의 필요성 및 기존설비(기계 및 계전 연동장치)의 노후화에 따른 장애 및 호환성 결여 등의 문제점들을 해결하기 위하여 전자 연동장치와 기존 계전 연동장치의 차이점을 제시 및 문제 해결방안을 고찰하고, 전자연동장치 동향을 살펴보았다.

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Treatment of Deformity in Polyostotic Fibrous Dysplasia Using Interlocking Intramedullary Nailing (다발성 섬유성 골이형성증 변형에 대한 나사못 맞물림 골수정을 이용한 치료)

  • Lee, Kwang-Suk;Oh, Jong-Keon;Koo, Ja-Seong
    • The Journal of the Korean bone and joint tumor society
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    • v.1 no.2
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    • pp.249-253
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    • 1995
  • The fibrous dysplasia is a progressive and disabling condition that lead to deformity, especially weight bearing bones. The morbidity that is associated with the polyostotic fibrous dysplasia is the recurrent fracture and deformity. Various methods of treatment had been failed to control this problem. We used osteotomy and reconstruction nailing for polyostotic fibrous dysplasia occured in the proximal part of right femur with varus deformity and reconstruction nailing in left femur without osteotomy, and interlocking intramedullary nailing in right tibia to prevent pathologic fracture. These methods brought a good result of bone union and full weight bearing ambulation after 1 year and 6 month follow up. We think these methods are useful methods to control refracture and deformity, so we reported this case with bibliographic reviews.

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Unilateral Lumbosacral Facet Interlocking without Facet Fracture

  • Ha, Sang-Woo;Ju, Chang-Il;Kim, Seok-Won;Um, Chang-Su
    • Journal of Korean Neurosurgical Society
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    • v.45 no.3
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    • pp.182-184
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    • 2009
  • Acute traumatic spondylolisthesis at L5-S1 level is a rare condition, almost exclusively the result of major trauma, frequently associated with transverse process fractures and severe neurologic deficits. Recently, open reduction and internal fixation with posterior stabilization has been the method of treatment most frequently reported. We report a rare case of traumatic L5-S1 spondylolisthesis with a unilateral facet locking with a review of literatures.

Structure and Properties of Segmented Block Copolyetheresters Based on PBT and PTMGT. 1. Thermal Properties of Dynamically Crystallized Samples

  • Jeon, Byoung-Yeol;Baik, Doo-Hyun
    • Proceedings of the Korean Fiber Society Conference
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    • 1998.10a
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    • pp.29-32
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    • 1998
  • Segmented block copolyetheresters defined as copolymers having sequences of alternating polyester hard blocks and polyether soft blocks create labile physical cross-links upon crystallization of hard polyester blocks Since the nature of the physical interlocking is a crystallite formed exclusively from the crystallizable hard segment, the basic understanding of interrelationship between crystallization condition and phase morphology is very important for the property control of the segmented block copolyetheresters. (omitted)

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