KR20010092963A - Method for repairing bridge and structure - Google Patents
Method for repairing bridge and structure Download PDFInfo
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- KR20010092963A KR20010092963A KR1020000015717A KR20000015717A KR20010092963A KR 20010092963 A KR20010092963 A KR 20010092963A KR 1020000015717 A KR1020000015717 A KR 1020000015717A KR 20000015717 A KR20000015717 A KR 20000015717A KR 20010092963 A KR20010092963 A KR 20010092963A
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B47/0038—Operating or controlling locks or other fastening devices by electric or magnetic means using permanent magnets
- E05B47/0043—Mechanical locks operated by cards having permanent magnets
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B35/00—Locks for use with special keys or a plurality of keys ; keys therefor
- E05B35/007—Locks for use with special keys or a plurality of keys ; keys therefor the key being a card, e.g. perforated, or the like
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- Bridges Or Land Bridges (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
Description
본 발명은 교량 보수방법 및 구조물에 관한 것으로,The present invention relates to a bridge repair method and structure,
특히, 하천이나 강 위에 설치되는 교량의 균열을 보수하여 교량의 붕괴를 방지함과 동시에 교량이 보수된 후에도 균열의 진행상태를 쉽게 확인할 수 있도록 하는 교량 보수방법 및 구조물에 관한 것이다.In particular, the present invention relates to a bridge repair method and structure for repairing a crack in a bridge or a river installed on a river or river to prevent the collapse of the bridge and to easily check the progress of the crack even after the bridge is repaired.
일반적으로 하천이나 강을 차량으로 건널 수 있도록 하기 위하여 하천이나 강을 가로지르는 교량을 설치하고 있으며, 이러한 교량은 수 많은 차량이 지나면서 반복적인 하중을 받게 되므로 장기간 사용할 때 교량에 미세한 균열이 발생되고, 균열의 진행에 따른 교량의 붕괴를 방지하기 위한 보수작업이 행해지고 있다.In general, in order to cross rivers or rivers by vehicles, bridges that cross rivers or rivers are installed.These bridges are subjected to repeated loads as a number of vehicles pass through them. In order to prevent the collapse of the bridge due to the progress of the crack, repair work is performed.
종래의 교량 보수작업은 교량에 균열이 발생하면 그 균열이 발생된 교량의 저면이나 기둥에 도 3과 같이 탄소섬유시트(53)를 부착하여 보수작업을 하고 있다.In the conventional bridge repair work, if a crack occurs in the bridge, the carbon fiber sheet 53 is attached to the bottom or pillar of the bridge where the crack is generated as shown in FIG. 3 to perform the repair work.
탄소섬유시트(53)는 건조한 망직물체를 한면 또는 양면에 대고 가열, 강압하여 융착시킨 무수지 상태의 강화섬유 시트로 인장강도 및 강성이 높아 토목, 건축용에 적용시 정적하중과 동적하중 및 기후에 대한 저항력이 뛰어난 것은 이미 입증되어 활발하게 사용되고 있다.Carbon fiber sheet (53) is an anhydrous reinforced fiber sheet in which a dry network is applied to one side or both sides by heating and forcing it to be fused and bonded. The excellent resistance to this is already proven and actively used.
그러나, 종래의 탄소섬유시트(53)를 이용한 교량(51) 및 기둥(52) 보수작업방법을 살펴보면, 먼저 교량(51)의 저면이나 기둥(52)의 콘크리트 표면의 오염층과 불량부(박리, 공극, 부식 등)을 그라인더로 제거하고 균열이나 손상된 단면을 에폭시 수지 등으로 주입하여 보수, 복구한 후 콘크리트 표면에 탄소섬유시트(53)를 접착용 수지로 부착하되 교량(51)의 저면 콘크리트 표면 전체에 탄소섬유시트(53)를 부착할 뿐만 아니라, 상기 콘크리트 표면에 부착되는 탄소섬유시트(53)는 콘크리트 표면 전체에 부착하면서 탄소섬유시트(53)의 이음부분이 있을 때는 그 이음부분을 서로 10cm정도씩 겹쳐지도록 부착하였으며, 탄소섬유시트(53)를 교량(51)의 저면 전체에 부착한 후에는 도장작업으로 교량의 균열에 대한 보수작업을 완료하였다.However, looking at the repair method of the bridge 51 and the column 52 using the conventional carbon fiber sheet 53, first, the contaminated layer and the defective part (peel-off) of the bottom surface of the bridge 51 or the concrete surface of the column 52 , Voids, corrosion, etc.) with a grinder, and cracks or damaged sections are injected and repaired and repaired with an epoxy resin, and the carbon fiber sheet 53 is attached to the concrete surface with an adhesive resin, but the bottom concrete of the bridge 51 In addition to attaching the carbon fiber sheet 53 to the entire surface, the carbon fiber sheet 53 attached to the concrete surface is attached to the concrete surface while the joint portion of the carbon fiber sheet 53 is attached to the entire surface of the concrete. Each other was attached to overlap each other by about 10cm, and after the carbon fiber sheet 53 was attached to the entire bottom of the bridge 51, the repair work for the crack of the bridge was completed by painting.
상기와 같은 종래의 교량 보수방법은 탄소섬유시트(53)를 교량(51)의 저면이나 기둥(52)의 콘크리트 표면 전체에 부착하는 것이므로 교량(51)의 위로부터 스며든 물이 배수되지 못하고 탄소섬유시트(53) 위의 교량 내부에 고이게 되므로 교량(51) 내부의 철근이 쉽게 부식될 뿐만 아니라, 교량(51)의 수명이 단축되는 문제점이 있었다.The conventional bridge repair method as described above is to attach the carbon fiber sheet 53 to the bottom surface of the bridge 51 or the entire concrete surface of the column 52, so that water permeated from the bridge 51 cannot be drained and the carbon cannot be drained. Since it is accumulated inside the bridge on the fiber sheet 53, not only the reinforcing bar inside the bridge 51 is easily corroded, there is a problem that the life of the bridge 51 is shortened.
또한, 상기와 같은 교량 보수방법은 교량(51) 보수후에 교량의 하부에서 균열의 계속적인 진행여부를 관측할 수 없을 뿐만 아니라, 비 경제적이고, 재 보강작업을 하기 어려운 문제점이 있었다.In addition, the bridge repair method as described above is not only able to observe the continuous progress of the crack in the lower part of the bridge after the bridge 51 repair, but also has a problem that it is uneconomical and difficult to reinforcement work.
따라서, 본 발명의 목적은 하천이나 강 위에 설치되는 교량의 균열을 보수할 때 교량 저면의 콘크리트 표면에 탄소섬유시트를 등간격이 되도록 부분적으로 부착함으로서 교량의 붕괴를 방지하고, 교량 내부로 스며든 빗물이 배수 및 증발될 수 있도록 할 뿐만 아니라, 교량이 보수된 후에도 균열의 진행상태를 쉽게 확인할 수 있도록 한 교량 보수방법 및 구조물을 제공함에 있다.Accordingly, an object of the present invention is to prevent the collapse of the bridge by partially attaching the carbon fiber sheet to the concrete surface of the bottom of the bridge at equal intervals when repairing the crack of the bridge installed on the river or river, soaking into the bridge The present invention provides a bridge repair method and a structure that not only allow rainwater to drain and evaporate, but also make it easy to check the progress of cracking after the bridge is repaired.
도 1은 본 발명의 시공예를 보인 종단면도1 is a longitudinal sectional view showing a construction example of the present invention
도 2는 본 발명이 시공된 상태의 교량 저면도Figure 2 is a bottom view of the bridge in the state the invention is constructed
도 3은 종래의 시공상태를 보인 종단면도Figure 3 is a longitudinal sectional view showing a conventional construction state
* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
1 : 교량 2 : 기둥1: bridge 2: pillar
3 : 콘크리트 표면 4 : 프라이머3: concrete surface 4: primer
5 : 접착용 수지 6 : 탄소섬유시트5: adhesive resin 6: carbon fiber sheet
7 : 함침용 수지 8 : 마감도장7: Resin for impregnation 8: Finish coating
이하, 본 발명의 바람직한 실시예를 첨부 도면에 의하여 상세하게 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
균열이 발생한 교량(1) 저면과 기둥(2)의 콘크리트 표면(3)에서 불량부를 제거하여 균열 및 손상된 부분을 보수, 복구하는 바탕처리작업을 하고, 에폭시계 수지인 주제와 경화제를 혼합한 프라이머(4)를 0.3kg/m2가 표준 도포량이 되도록 2-3회 도포하여 24시간 이상 충분히 양생시키며, 그 위에 표준 도포량 0.5kg/m2으로 접착용 수지(5)를 도포하여 그 위에 교량(1) 저면이나 기둥(2)의 콘크리트 표면(3)이 노출되도록 탄소섬유시트(6)를 부착한 후, 함침용 수지(7)를 도포한다.Primer that mixes the main material and the curing agent, epoxy resin, to remove and repair the defective parts from the bottom of the bridge (1) and the concrete surface (3) of the column (2) where cracks have occurred. (4) is applied 2-3 times so that 0.3 kg / m 2 is the standard coating amount and is sufficiently cured for at least 24 hours, and the adhesive resin (5) is applied thereon with a standard coating amount of 0.5 kg / m 2 and the bridge (1 ) The carbon fiber sheet 6 is attached so that the bottom surface or the concrete surface 3 of the pillar 2 is exposed, and then the impregnation resin 7 is applied.
이때 상기 탄소섬유시트(6)를 2층이상 적층 부착할 때는 탄소섬유시트(6)의 부착과 함침용 수지(7)의 도포를 반복 실시한다.At this time, when laminating and attaching the carbon fiber sheet 6 in two or more layers, the carbon fiber sheet 6 is repeatedly attached and the resin 7 for impregnation is repeatedly applied.
상기와 같이 탄소섬유시트(6) 위에 함침용 수지(7)의 도포가 완료되면 평균기온 10℃에서는 2주간, 평균기온 20℃에서는 1주간 양생기간을 시켜 완전경화를 시킨 후, 그 위에 마감도장(8)을 한다.When the coating of the impregnation resin 7 on the carbon fiber sheet 6 is completed as described above, the curing period is allowed to be completely cured by giving a curing period for 2 weeks at an average temperature of 10 ° C. and 1 week at an average temperature of 20 ° C. (8).
특히, 콘크리트 표면(3)의 부분 노출폭(b)과 탄소섬유시트(6)의 부착폭(a)이 등간격으로 부착되는 상기 탄소섬유시트(6)는 그 폭을 10cm-100cm까지 보수, 보강작업 대상물의 상태에 따라 선택할 수 있으며, 가장 바람직하게는 20cm-30cm의 폭이 되도록 등간격으로 부착한다.In particular, the carbon fiber sheet 6 to which the partial exposure width (b) of the concrete surface (3) and the attachment width (a) of the carbon fiber sheet (6) is attached at equal intervals, repairs the width to 10 cm-100 cm, It can be selected according to the condition of the reinforcement work object, and most preferably attached at equal intervals so as to have a width of 20cm-30cm.
또한 교량(1)이나 기둥(2)의 보수, 보강작업시 사용되는 탄소섬유시트(6)의 최적두께를 만족할 수 있도록 부착폭(a)에 300g/m2인 탄소섬유시트(6)를 2겹 또는 3겹을 반복 부착하는 것이 바람직하다.In addition, to satisfy the optimum thickness of the carbon fiber sheet (6) used in repairing and reinforcing the bridge (1) or column (2), the carbon fiber sheet (6) having a 300g / m 2 in the attachment width (a) 2 It is preferable to repeatedly attach a ply or three plies.
이와 같은 본 발명의 보다 구체적인 실시예를 설명한다.More specific embodiments of the present invention will be described.
본 발명에 의한 방법 및 구조물을 시험하기 위한 시험체의 제작은 콘크리트 슬래브의 경우 표1에서와 같은 배합설계표에 준하여 제작되고, 콘크리트 슬래브에 내설되는 철근은 표2와 같은 물성치를 갖는 철근을 사용하여 240×120×15cm 크기의 콘크리트 슬래브 시험체를 제작하였다.Fabrication of test specimens for testing the method and structure according to the present invention is made according to the mixing design table as shown in Table 1 in the case of concrete slab, and the reinforcing bars in the concrete slab are made of reinforcing bars having physical properties as shown in Table 2. A concrete slab specimen of 240 × 120 × 15 cm size was prepared.
상기와 같이 완성된 콘크리트 슬래브 시험체는 일정시간을 물에 담그었다가 건조시켜 균열을 발생시키고, 시험체 슬래브에 탄소섬유시트(6)를 부착하기 위해 프라이머(4)와 함침용수지(7)는 각각 표3과 표4와 같은 물성치의 것을 사용하여 탄소섬유시트(6)를 콘크리트 슬래브 시험체에 부착하였다.The concrete slab test specimen completed as described above is soaked in water for a predetermined time and dried to generate cracks, and the primer 4 and the impregnating resin 7 are respectively attached to attach the carbon fiber sheet 6 to the test slab. The carbon fiber sheet 6 was attached to the concrete slab specimens using the physical properties as shown in Tables 3 and 4.
상기 부착된 탄소섬유시트(6)는 고강도 탄소섬유시트인 CT7S로서 섬유중량이 200g/m2는 CT7S #2이고, 300g/m2는 CT7S #3를 표5와 같이 사용한다.The attached carbon fiber sheet 6 is CT7S, a high-strength carbon fiber sheet, the fiber weight of 200g / m 2 is CT7S # 2, 300g / m 2 is used CT7S # 3 as shown in Table 5.
또한 탄소섬유시트(6) 중 섬유중량이 200g/m2인 CT7S #2는 0.11mm 두께를 사용하고, 섬유중량이 300g/m2인 CT7S #3는 0.165mm 두께의 탄소섬유시트(6)를 사용하였다.In addition, CT7S # 2 having a fiber weight of 200 g / m 2 in the carbon fiber sheet 6 uses 0.11 mm thickness, and CT7S # 3 having a fiber weight of 300 g / m 2 uses a carbon fiber sheet 6 having a thickness of 0.165 mm. Used.
상기와 같이 저면이 보수 보강되어 완성된 시험체는 위에서 50톤 엑츄에이터(actuator)로 가압하여 파괴시험을 한 결과, 탄소섬유시트(6)를 보강하지 않은 시험체의 경우에는 이론 파괴하중치인 34.06톤과 30.7톤 보다 약간 상회하는 상태의 결과를 나타내었다.As a result of the above test, after completion of repair and reinforcement of the bottom, the test specimen was pressurized with a 50 ton actuator from the top. The result was slightly above the tone.
반면에 섬유중량이 200g/m2인 탄소섬유시트(6)를 10cm, 20cm, 25cm 간격으로 1겹 시공한 시험체의 경우에는 38.4톤-39.8톤의 파괴하중을 나타내어 이론치 34.06톤 보다 크게 상회하는 파괴하중치를 나타냈을 뿐만 아니라, 동일한 탄소섬유시트(6)를 시험체의 저면 전체에 부착했을 때 44.9톤의 파괴하중을 나타내는 것에 비교하여도 손색없는 파괴하중을 나타냄을 알 수 있었다.On the other hand, in the case of a test body in which a carbon fiber sheet 6 having a fiber weight of 200 g / m 2 was constructed in one layer at intervals of 10 cm, 20 cm, and 25 cm, the fracture load of 38.4 tons to 39.8 tons was shown to be greater than the theoretical value of 34.06 tons. In addition to showing the load value, it was found that the same carbon fiber sheet 6 exhibited a breakage load comparable to that of the 44.9 ton breakdown load when the same carbon fiber sheet 6 was attached to the entire bottom of the test body.
또한, 섬유중량이 300g/m2인 탄소섬유시트(6)를 10cm, 15cm, 20cm, 25cm,30cm 간격으로 2겹 시공한 시험체의 경우에는 34.8톤-39.2톤의 파괴하중을 나타내어 이론치 30.7톤 보다 크게 상회하는 파괴하중치를 나타냈을 뿐만 아니라, 동일한 탄소섬유시트(6)를 시험체의 저면 전체에 부착했을 때 36.2-42.3톤의 파괴하중을 나타내는 것에 비교하여도 손색없는 파괴하중을 나타냄을 알 수 있었다.In addition, in the case of two-layered carbon fiber sheet 6 having a fiber weight of 300 g / m 2 at intervals of 10 cm, 15 cm, 20 cm, 25 cm, and 30 cm, the fracture load of 34.8 to 39.2 tons was shown, which was higher than the theoretical value of 30.7 tons. In addition to showing a significantly higher fracture load value, when the same carbon fiber sheet (6) was attached to the entire bottom of the test specimen, it was found that the fracture load was comparable to that of the fracture load of 36.2-42.3 tons. .
특히, 섬유중량이 300g/m2인 탄소섬유시트(6)를 25cm 간격으로 3겹 시공한 시험체의 경우에는 42.8톤의 파괴하중을 나타내어 이론치 30.7톤은 물론 시험체의 저면 전체에 탄소섬유시트(6)를 부착했을 때의 파괴하중 36.2-42.3톤 보다 높은 파괴하중을 나타내었다.Particularly, in the case of three-layered carbon fiber sheet 6 having a fiber weight of 300 g / m 2 with 25 cm intervals, the fracture load was 42.8 tons, and the carbon fiber sheet (6 ) The failure load at the time of) is higher than 36.2-42.3 tons.
따라서, 섬유중량이 300g/m2인 탄소섬유시트(6)를 부착폭(a)과 노출폭(b)을 20-30cm 간격이 되도록 등간격으로 부착 시공하면 교량(1)이나 기둥(2)의 파괴하중은 전체면을 시공할 때와 같으면서도 콘크리트 내의 수분 증발효과가 있고, 교량(1)이나 기둥(2)의 균열을 시공후에도 노출폭(b)을 통해 외부에서 관측할 수 있을 뿐만 아니라, 탄소섬유시트(6)의 사용량 감소로 20%의 시공비용 점감 효과를 얻을 수 있으며, 1차 보강된 부분에 재 보강작업을 할 수 있다.Therefore, when the carbon fiber sheet 6 having a fiber weight of 300 g / m 2 is attached at equal intervals so that the attachment width (a) and the exposure width (b) are 20-30 cm apart, the bridge (1) or the pillar (2) The fracture load of is the same as when constructing the whole surface, but it has the effect of evaporating moisture in concrete, and the crack of bridge (1) or column (2) can be observed from the outside through the exposure width (b) after construction. By reducing the amount of carbon fiber sheet 6 used, a 20% construction cost reduction effect can be obtained, and the primary reinforcement can be reinforced.
상기에서와 같이 본 발명은 균열이 발생된 교량이나 기둥에 섬유중량이 300g/m2인 탄소섬유시트를 20-30cm의 등간격으로 2-3겹을 부착 시공함으로서 교량이나 기둥의 파괴하중은 기존과 같이 유지하면서도 콘크리트 내의 수분을 증발시킬수 있고, 탄소섬유시트 시공후에도 외부에서 균열의 진행상태를 관측할 수 있을 뿐만 아니라, 탄소섬유시트의 사용량 감소로 20%의 시공비용을 절감하고, 탄소섬유시트를 1차 보강한 교량이나 기둥에 탄소섬유시트를 재 보강할 수 있는 효과가 제공되는 것이다.As described above, in the present invention, by attaching 2-3 layers of carbon fiber sheets having a fiber weight of 300 g / m 2 to the bridge or column where cracks are generated at equal intervals of 20-30 cm, the breaking load of the bridge or the column is different from that of the existing bridge or column. It can evaporate moisture in concrete while maintaining the same, and can observe the progress of cracking from the outside even after the construction of carbon fiber sheet, and reduce the construction cost of 20% by reducing the amount of carbon fiber sheet, The effect of reinforcing the carbon fiber sheet on the primary reinforced bridge or column is provided.
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