• Title/Summary/Keyword: 보수공법

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Evaluation of Design Equation and Stability for Trenchless Pipe Liner System with Boundary Treatment (비굴착 전체보수용 라이너의 두께 설계식 및 말단부 처리에 따른 라이너의 안정성 검토 연구)

  • Park, Jong-Sup;Song, Ho-Myeon
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.8 no.5
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    • pp.1166-1172
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    • 2007
  • Drainage pipeline system repaired by trenchless technology using liners can be defined between partial and entire collapse. The liners in the partial collapse pipeline are subjected to only uniform groundwater pressure on the surface. This research evaluates practical and useful cured-in-placed pipe (CIPP) design equations based on experimental results and finite element analysis results. Also, stability evaluation of pipe liner system with edge treatment is performed using finite element analysis. The CIPP equation should be used to design liner pipe system.

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Comparative Cost Analysis of Repair Method according to Bridge Superstructure Type (교량 상부구조 형식에 따른 보수공법 비용 비교분석)

  • Lee, Changjun;Park, Taeil
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2023.05a
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    • pp.277-278
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    • 2023
  • The need for maintenance of bridge infrastructure is increasing due to aging, and the cost of maintaining the infrastructure must be calculated for effective budget distribution. Therefore, in this study, representative defects according to bridge superstructure type are derived to calculate the cost for each repair method. First of all, the representative bridges, PSCI girder bridge, Rahmen bridge, Steel box girder bridge, and RC slab bridge, were selected as superstructures using BMS data, and repair methods for defects were presented. In addition, the cost of the repair method by superstructure type was compared. This result is expected to predict total maintenance costs in consideration of the maintenance cycle.

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Improvement of Durability in Concrete Structures Using CRM (내화학성 적층보강공법(CRM)을 활용한 콘크리트 구조물의 내구성능 향상)

  • Kim, Chun-Ho;Kim, Sang-Doh;Kim, Nam-Wook
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.17 no.6
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    • pp.145-152
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    • 2013
  • As a typical construction material, concrete has been used in building all kinds of structures since the late $19^{th}$ century. Although it was recognized to secure durability as long as the regulations on design and construction have been reasonably complied, the trends of life-shortening and deterioration have frequently occurred due to all kinds of the external effects that have been experienced during the procedures of using the structures. To make matters even worse, deterioration of the concrete structures according to deterioration can not be controlled any more. Finally, the reality is that repair and maintenance are necessary in the maintenance aspect of the concrete structure. In this study, CRM(Chemical Resistance of Laminating Reinforcement Method), which had been developed to reinforce the surface of concrete and specially improve chemical resistance performance, has been applied to enhance the existing repairing and maintenance method. Therefore, the result has been drawn with comparison and analysis of the specimens applied with the general repairing and maintenance method and CRM through a variety of durability test in this study. With the result of the test, durability of the specimen applied with CRM has been more improved than the existing repairing and maintenance method, which is judged as because of the laminating effect due to reinforcement of epoxy impregnated of alkali-resistance fiber and double layered fiber reinforced seat.

A Study on the Development of Evaluation Method of Repair Performance for the Repair Method of Reinforced Concrete Structures (철근콘크리트구조물 보수공법의 성능평가 방법 개발에 관한 연구)

  • Kim Yong-Ro;Kim Hyo-Rak;Lee Do-Bum;Kim Moo-Han
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2005.05a
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    • pp.203-206
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    • 2005
  • The purpose of this study is to develop the evaluation method of repair performance for the repair method of reinforced concrete structures deteriorated due to combined deterioration, its results are summarized as the follows. After investigating and analyzing the experimental data of this study and existing research, it is proposed the evaluation method on the repair performance for the repair method of reinforced concrete structures using evaluation method of reinforcing corrosion by combined deterioration accelerated test.

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A Study on Probability Carbonation Progress of Concrete After Repair Method of Carbonated RC Structures (탄산화가 진행된 기존 RC구조물의 보수공법 적용후 탄산화 진행 예측에 관한 확률론적 연구)

  • Lee, Hyung-Min;Lee, Han-Seung
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2016.10a
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    • pp.41-42
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    • 2016
  • As the importance of maintenance of reinforced concrete structure recently has emerged, the attention of durability of structure has been increasing. There are many studies about durability decline especially due to the carbonation. In order to study carbonation progress after surface repair of carbonated concrete, each carbonation penetration velocity from different repair materials of concrete structure is compared through the experiment of carbonation accelerating CO2 concentration to 20% and 100%. As carbonation infiltration progress is predicted through this study, the counterplan of service life evaluation will be prepared on selection of repair materials of concrete structure.

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A Study on probability of rebar corrosion After repair method of carbonated existing RC structures (탄산화가 진행된 기존 RC구조물의 보수공법 적용후 철근의 부식확률 평가에 관한 연구)

  • Lee, Hyung-Min;Kim, Sang-Youl;Lee, Han-Seung
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2015.05a
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    • pp.32-33
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    • 2015
  • As the importance of maintenance of reinforced concrete structure recently has emerged, the attention of durability of structure has been increasing. There are many studies about durability decline especially due to the carbonation. In order to study carbonation progress after surface repair of carbonated concrete, each carbonation penetration velocity from different repair materials of concrete structure is compared through the experiment of carbonation accelerating CO2 concentration to 100%. As carbonation infiltration progress is predicted through this study, the counterplan of service life evaluation will be prepared on selection of repair materials of concrete structure.

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Behavior Evaluation of Thin Bonded Continuously Reinforced Concrete Overlay on Aged Jointed Concrete Pavement(2) (노후 줄눈 콘크리트 포장 보수를 위한 얇은 연속 철근 콘크리트 덧씌우기 포장의 거동 평가(2))

  • Ryu, Sung-Woo;Cho, Yoon-Ho
    • International Journal of Highway Engineering
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    • v.12 no.4
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    • pp.101-110
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    • 2010
  • In this paper, it has been studied about the CRCO to maintain or rehabilitate the aged JCP. The CRCO and JCO was constructed at useless section of Seo-Hae-Ahn express highway in South Korea. The performance evaluation was conducted. Especially, it was focused on the roll of longitudinal reinforced steels inserted into the CRCO. On crack survey results from field construction section, the reflection cracks at joint of the existing pavement occurred in CRCO. However, due to the constraints of longitudinal reinforced steels, crack width was small. Total crack length and quantity in the CRCO more than that in the JCO. And crack spacing in the CRCO was narrower than it in the CRCP. Through the bonding strength test results, if the cold milling and cleaning as well as surface treatment is applied, there will be no debonding problem at interlayer in the early age. From analysis of the horizontal behavior at the joint, the longitudinal reinforced steels constrained crack width which became wider than initial state over time. Also, that steel in the CRCO reduced the horizontal movement due to temperature variation(4 times than that in the JCO). But, if interface is debonded, the roll decreased. Vertical VWG data showed that CRCO did not occur debonding problem at steel location, but there was some problem in JCO. It was confirmed by field coring. The tensile strain appeared in the CRCO, But the compressive strain occurred in the JCO in early age. Through the FWD test result, deflection in the CRCO was less than that in the JCO. And K value in the CRCO was greater than it in the JCO.

보수용 모르타르의 강도 및 투과특성에 관한 연구

  • 백신원
    • Proceedings of the Korean Institute of Industrial Safety Conference
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    • 2003.10a
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    • pp.378-383
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    • 2003
  • 콘크리트 구조물은 여러 가지 원인에 의해 손상을 입거나 시간이 지남에 따라 노후화가 진행된다. 이와 같이 손상을 입거나 노후화가 진행된 구조물은 그 내구성능이 저하되어 계속 사용하기 위해서는 보수를 하거나 보강해야만 한다. 구조물을 보수하거나 보강하는 것은 구조물의 수명을 크게 연장하는 일로 여러 가지의 경제적인 효과가 있기 때문에 이에 대한 연구와 공법 개발 등이 활발히 이루어지고 있다.(중략)

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