KR20030013088A - Method for reducing heat of hydration generated from mass concrete - Google Patents
Method for reducing heat of hydration generated from mass concrete Download PDFInfo
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- KR20030013088A KR20030013088A KR1020010047404A KR20010047404A KR20030013088A KR 20030013088 A KR20030013088 A KR 20030013088A KR 1020010047404 A KR1020010047404 A KR 1020010047404A KR 20010047404 A KR20010047404 A KR 20010047404A KR 20030013088 A KR20030013088 A KR 20030013088A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2200/00—Geometrical or physical properties
- E02D2200/16—Shapes
- E02D2200/165—Shapes polygonal
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
Abstract
Description
본 발명은 매스 콘크리트의 수화열 저감방법에 있어서, 콘크리트의 양생시 부재의 두께가 두꺼워 내부측에서 발생되는 수화열에 의해 건조 수축정도가 틀려 균열이 발생됨을 방지할 수 있는 매스 콘크리트의 수화열 저감방법에 관한 것이다.The present invention relates to a method for reducing the heat of hydration of mass concrete, in which the thickness of a member during curing of the concrete is thick, so that the drying shrinkage degree is different due to the heat of hydration generated from the inside to prevent cracking. will be.
일반적으로, 확대기초는 구조상 그 폭과 두께가 커지는 것이 일반적이고 매스 콘크리트가 되어 많은 수화열(HEAT OF HYDRATION)이 발생되므로 이를 제어하지 않을 경우에는 건조수축에 의한 균열 발생 등으로 구조물에 악영향을 미치게 된다.In general, the expansion base is generally larger in width and thickness due to its structure, and since it becomes mass concrete and generates a lot of heat of hydration, if it is not controlled, it will adversely affect the structure due to cracking caused by dry shrinkage. .
특히, 수중(지하) 확대기초의 건습에 의한 균열이 있을 경우에는 철근의 부식으로 구조물에 큰 영향을 줄 수 있다.In particular, in the case of cracks caused by wet and dry foundations of underwater (underground) expansion, corrosion of reinforcing bars can greatly affect the structure.
도 1 에 도시된 바와 같이 종래에는, 확대기초부(2)에 수평으로 파이프 배관(4)을 설치하고 펌프를 이용하여 물을 강제로 흘려 보내는 파이프 쿨링을 사용하고 있다.As shown in FIG. 1, the pipe cooling 4 is installed horizontally in the expansion base part 2 horizontally, and the pipe cooling which forcibly flows water using a pump is used.
상기와 같이 펌프를 이용하는 파이프 쿨링 시스템(pipe colling system)은 설비비가 많이 소요될 뿐만 아니라, 파이프가 배관된 길이에 비해 효과가 크지 않다.As described above, the pipe cooling system using the pump (pipe colling system) not only requires a lot of equipment costs, but the effect is not large compared to the length of the pipe pipe.
또한, 확대기초부(2)에 수평으로 파이프 배관(4)을 이중으로 설치하고, 콘크리트를 타설한 후, 수평으로 설치된 파이프 배관(4)으로 펌프를 이용해 물을 한쪽에서 주입시키면 주입된 물은 수평으로 설치된 파이프 배관(4)을 통해 출구측으로 배출되면서 콘크리트에서 발생되는 수화열을 흡수하여 따듯하게 데워진 물을 배출시키는 것이다.In addition, the pipe foundation (4) is installed horizontally in the enlarged base portion (2), and after pouring concrete, the water is injected into the pipe pipe (4) horizontally installed by using a pump from one side It is discharged to the outlet side through the horizontal pipe pipe 4 is installed to absorb the heat of hydration generated in the concrete to discharge the warmed water.
이때에 수평으로 설치된 파이프 배관(4)으로 물을 공급하는 펌프에서 발생된 진동 등은 수평으로 설치된 파이프 배관(4)을 타고 전달된다.At this time, the vibration generated from the pump for supplying water to the pipe pipe 4 installed horizontally is transmitted through the pipe pipe 4 installed horizontally.
상기와 같이 파이프 배관(4)을 통해 전달되는 진동은, 확대기초부(2)에서 양생되는 콘크리트에 전달되어 작은 균열을 발생시킬 수 있는 문제점이 있다.Vibration transmitted through the pipe pipe 4 as described above, there is a problem that can be transmitted to the concrete to be cured in the enlarged base portion 2 to generate a small crack.
또한, 확대기초부(2)의 내부측과 외부측은 콘크리트의 양생시 발생되는 수화열로 인해 온도차가 발생되기 때문에 확대기초부(2)에 설치된 수평 파이프 배관(4)을 통해 물을 흘려 보내주므로 수화열을 경감시키고 있으나, 상기와 같은 방법은 확대기초부(2) 내측에서 발생되는 수화열을 감소시키는 방향으로만 접근하고 있는 방법을 사용하고 있다.In addition, since the temperature difference occurs due to the heat of hydration generated during curing of concrete, the inner side and the outer side of the enlarged base part 2 send water through the horizontal pipe piping 4 installed in the expanded base part 2, so that the heat of hydration However, the above method uses a method of approaching only in a direction of reducing the heat of hydration generated inside the enlarged base portion 2.
따라서, 본 발명은 상기와 같은 종래의 접근방법을 개선하여 창출된 것으로, 그 목적은 확대기초부의 내부측과 외부측을 콘크리트 양생시에 발생하는 수화열을 이용하여 온도차를 이중으로 적게하여(내부하강, 외부상승) 콘크리트의 균열이 발생됨을 억제하여 강도의 저하를 막을 수 있는 매스 콘크리트의 수화열 저감방법을 제공함에 있다.Therefore, the present invention was created by improving the conventional approach as described above, the object of which is to reduce the temperature difference by double the temperature difference by using the heat of hydration generated during concrete curing of the inner and outer sides of the expanded base portion (inner loading) In addition, the present invention provides a method of reducing heat of hydration of mass concrete that can suppress the occurrence of cracks in concrete and prevent a decrease in strength.
도 1 은 종래의 매스 콘크리트의 수화열을 방지하기 위한 파이프의 배관 상태를 나타내는 도면이다.1 is a view showing a piping state of a pipe for preventing the heat of hydration of a conventional mass concrete.
도 2 는 본 발명의 매스 콘크리트의 수화열 저감방법의 파이프 배관 상태를 나타내는 도면이다.2 is a view showing a pipe piping state of the method for reducing heat of hydration of mass concrete of the present invention.
도 3 은 본 발명의 매스 콘크리트 수화열 저감방법의 사용상태를 나타내는 도면이다.3 is a view showing a state of use of the mass concrete hydration heat reduction method of the present invention.
-도면의 주요부분에 대한 부호의 설명-Explanation of symbols on the main parts of the drawing
10: 확대기초부 11: 물 채움공간부10: expansion base part 11: water-filling space part
12: ㄷ자형 강관 파이프12: U-shaped steel pipe
따라서, 상기와 같은 본 발명의 목적을 달성하기 위하여, 매스 콘크리트의 수화열 저감방법은, 확대기초부의 골조 및 물 채움공간을 형성하는 단계와, 상기 확대기초부상에 골조가 설치된 후, ㄷ자형 강관 파이프의 개구된 부분이 상부측으로 향하도록 수직으로 배관되며, ㄷ자형 강관 파이프의 끝단부가 확대기초부상 보다 돌출되게 형성시키는 단계와, 상기 철근 및 ㄷ자형 강관 파이프가 형성된 확대기초부상에 콘크리트를 타설하는 단계와, 상기 타설된 콘크리트의 양생시 물 채움공간부에 확대기초부상의 ㄷ자형 강관 파이프의 끝단부가 물에 잠기도록 채워넣는 단계와, 상기 타설된 콘크리트의 양생시 발생되는 수화열의 온도차에 의해 수직배관된 ㄷ자형 강관 파이프를 통하여 물이 계속 순환되도록 시키는 단계와, 상기 수화열에 의해 열교환된 물은 ㄷ자형 강관 파이프를 통해 확대기초부의 외부측에 채워져 있는 물과 동일한 온도를 갖도록 혼합되는 단계로 구성된다.Therefore, in order to achieve the object of the present invention as described above, the method of reducing the heat of hydration of mass concrete, forming a skeleton and water filling space of the expanded base portion, and after the skeleton is installed on the expanded foundation portion, the c-shaped steel pipe pipe The pipe is vertically piped so that the opened portion of the pipe is directed upward, and the end of the U-shaped steel pipe is formed to protrude more than the enlarged base portion. And, filling the end of the U-shaped steel pipe pipe on the enlarged base portion in the water filling space during curing of the poured concrete so as to be submerged in water, and vertical piping by the temperature difference of the heat of hydration generated during curing of the poured concrete Allowing the water to continue to circulate through the c-shaped steel pipe and heat-exchanged by the heat of hydration. The water consists of mixing through the U-shaped steel pipe to have the same temperature as the water filled on the outside of the enlarged base.
상기와 같이 구성된 본 발명의 매스 콘크리트의 수화열 저감방법을 첨부된 도면을 첨부하여 아래와 같이 설명한다.With reference to the accompanying drawings, the method for reducing the heat of hydration of the mass concrete of the present invention configured as described above will be described below.
도 2 는 본 발명의 매스 콘크리트의 수화열 저감방법의 파이프 배관 상태를 나타내는 도면이고, 도 3 은 본 발명의 매스 콘크리트 수화열 저감방법의 사용상태를 나타내는 도면이다.FIG. 2 is a view showing a pipe piping state of a method for reducing heat of hydration of mass concrete of the present invention, and FIG. 3 is a view showing a state of use of the method for reducing heat of hydration of mass concrete of the present invention.
본 발명은 매스 콘크리트의 수화열 저감방법은 확대기초부(10)의 골조를 철근을 이용해 우선 형성한다.In the present invention, the method for reducing heat of hydration of mass concrete is first formed using reinforcing bars of the expanded base portion 10.
상기 확대기초부(10)를 형성하고 있는 철근의 골조가 완성되면, 철근의 골조에 ㄷ자형 강관 파이프(12)를 배관한다.When the frame of the reinforcing bar forming the enlarged base portion 10 is completed, the U-shaped steel pipe pipe 12 is piped to the frame of the reinforcing bar.
또한, 확대기초부(10)의 골조를 형성함과 동시에 확대기초부(10)가 물에 의해 잠기도록 물 채움공간부(11)를 형성시킨다.In addition, while forming the skeleton of the enlarged base portion 10 and at the same time to form the water filling space portion 11 so that the enlarged base portion 10 is submerged by water.
상기 확대기초부(10)의 골조에 배관되는 ㄷ자형 강관 파이프(12)는 내측이 빈 관으로 물이 흐를 수 있도록 형성된다.The U-shaped steel pipe 12, which is piped to the framework of the enlarged base portion 10, is formed to allow water to flow into an empty tube inside.
따라서, ㄷ자형 강관 파이프(12)의 양쪽 끝단은 확대기초부(10)의 상부측을 향하도록 위치시킨다.Therefore, both ends of the U-shaped steel pipe 12 are positioned to face the upper side of the enlarged base portion 10.
상기 ㄷ자형 강관 파이프(12)는 확대기초부(10) 골조의 중앙부분에 도 3 에 도시된 바와 같이 다수개 형성된다.The c-shaped steel pipe 12 is formed in plural as shown in FIG. 3 in the central portion of the skeleton of the enlarged base portion 10.
상기 확대기초부(10)의 골조에 다수개의 ㄷ자형 강관 파이프(12)가 형성되면, 확대기초부(10)의 골조부에 콘크리트를 타설시키도록 공급한다.When a plurality of U-shaped steel pipes 12 are formed in the framework of the enlarged foundation 10, the concrete is supplied to the frame of the enlarged foundation 10.
이때 공급되는 콘크리트는 ㄷ자형 강관 파이프(12)의 양끝단부가 잠겨서 막히지 않도록 돌출되어 있도록 공급된다.At this time, the concrete is supplied so that both ends of the U-shaped steel pipe 12 are locked so as to protrude so as not to be blocked.
상기와 같이 콘크리트가 확대기초부(10)에 완전하게 공급되고, 콘크리트의 양생이 끝나면, 철근의 골조 및 ㄷ자형 강관 파이프(12)는 콘크리트 확대기초부 (10)의 보강프레임 역할을 하게 된다.As described above, the concrete is completely supplied to the enlarged base portion 10, and when curing of the concrete is completed, the framework of the reinforcement and the U-shaped steel pipe pipe 12 serve as a reinforcement frame of the expanded concrete base portion 10.
상기 철근의 골조부 및 ㄷ자형 강관 파이프(12)에 타설된 콘크리트가 양생되면, 상기의 콘크리트가 타설된 확대기초부(10)가 잠기도록 물 채움공간부(11)에 물을 공급한다.When the concrete placed in the frame part of the reinforcement and the U-shaped steel pipe 12 is cured, water is supplied to the water filling space 11 so that the expanded base portion 10 on which the concrete is poured is locked.
상기 확대기초부(10)를 잠기도록 한 물 채움공간부(11)의 물은 ㄷ자형 강관 파이프(12)가 형성된 끝단부까지 잠기도록 공급하여 채워둔다.The water in the water filling space 11 to lock the enlarged base portion 10 is supplied to be filled to be locked to the end portion where the c-shaped steel pipe 12 is formed.
상기와 같이 물 채움공간부(11)에 채워진 물은 ㄷ자형 강관 파이프(12)에 양단부로 인입되어 채워지게 된다.As described above, the water filled in the water filling space 11 is drawn into the C-shaped steel pipe 12 at both ends and filled.
상기 확대기초부(10)에 채워진 콘크리트는 덩어리져 있기 때문에 콘크리트 자체가 양생되면서 외부측 및 내부측에서 수화열이 발생된다.Since the concrete filled in the expanded base portion 10 is agglomerated, the heat of hydration is generated from the outside and the inside while the concrete itself is cured.
이때에 발생되는 콘크리트의 수화열은 외측과 내부측의 온도가 각 부분마다 상이하게 발생된다.The heat of hydration of the concrete generated at this time is generated differently for each part of the temperature of the outside and the inside.
따라서, 이때에 발생되는 콘크리트의 수화열은 확대기초부(10)에 공급된 콘크리트 중 외주면측 보다 내측 중앙부측이 수화열의 핵이 크게 집중되어 있기 때문에, 특히 중앙 부분이 심하게 뜨거워지는 현상이 발생된다.Therefore, the heat of hydration of the concrete generated at this time is particularly concentrated because the core of the heat of hydration is concentrated on the inner central portion side than the outer peripheral surface side of the concrete supplied to the enlarged base portion 10, the central portion is particularly hot.
상기 확대기초부(10)의 콘크리트에서 양생되면서 발생된 수화열은 확대기초부(10)의 중심부분에 배관된 ㄷ자형 강관 파이프(12)로 전달된다.The hydration heat generated while curing in the concrete of the expanded base portion 10 is transmitted to the U-shaped steel pipe pipe 12 piped to the central portion of the expanded base portion 10.
확대기초부(10)에 배관된 ㄷ자형 강관 파이프(12)에 전달된 콘크리트의 수화열은, ㄷ자형 강관 파이프(12)에 채워진 물에 전달되면서 열적 교환을 이루게 된다.The heat of hydration of the concrete delivered to the U-shaped steel pipe 12 connected to the enlarged base portion 10 is transferred to the water filled in the U-shaped steel pipe 12 to achieve thermal exchange.
확대기초부(10)의 콘크리트 수화열은 ㄷ자형 강관 파이프(12)의 전체 부분에 동일한 온도로 발생되는 것이 아니기 때문에, 이로 인해 확대기초부(10)의 콘크리트부에 매설되어 있는 ㄷ자형 강관 파이프(12)에 전달되는 수화열은, 낮은 수화열이 발생되는 부분과 높은 수화열 등과 같이 부분적으로 발생되는 수화열의 온도차가 발생된다.Since the heat of hydration of the concrete of the enlarged base portion 10 does not occur at the same temperature in the entire portion of the c-shaped steel pipe pipe 12, the C-shaped steel pipe pipe buried in the concrete portion of the expanded base portion 10 is thereby formed. The heat of hydration transferred to 12) generates a temperature difference between a part where low heat of hydration is generated and a part of heat of hydration, such as high heat of hydration.
따라서, 각각의 콘크리트 부분에서 발생된 수화열에 의해 뜨거워진 물이 물채움공간부(11)의 상부측으로 상승하기 때문에 ㄷ자형 강관 파이프(12)를 통하여 물은 자연적으로 흐르게 된다.Therefore, since the water heated by the heat of hydration generated in each concrete portion rises to the upper side of the water filling space 11, the water flows naturally through the c-shaped steel pipe pipe 12.
이와 같이 ㄷ자형 강관 파이프(12)의 양단측으로 물은 수화열의 불균일함에 의한 발생된 온도차이 때문에, 물 채움공간부(11)에 채워진 물은 계속해서 순환되면서 확대기초부(10)의 외부의 물 채움공간부(11)에 채워진 물과 혼합된다.Thus, due to the temperature difference generated by the non-uniformity of the heat of hydration due to the non-uniformity of the heat of hydration of the c-shaped steel pipe 12, the water filled in the water filling space 11 continues to circulate while water outside the enlarged base 10 It is mixed with the water filled in the filling space (11).
상기 ㄷ자형 강관 파이프(12)를 따라 흐르는 물은 ㄷ자형 강관 파이프(12)의 어느 한쪽 부분에서 인입되어 배출되는 작용에 의해, 콘크리트에서 발생된 수화열은 ㄷ자형 강관 파이프(12)내를 통해 순환되는 물에 전달되어 배출된다.Water flowing along the U-shaped steel pipe 12 is drawn in and discharged from one portion of the U-shaped steel pipe 12, and the heat of hydration generated in concrete is circulated through the U-shaped steel pipe 12 Is delivered to the discharged water.
따라서, 확대기초부(10)에 수직배관된 ㄷ자형 강관 파이프(12)에 의해 확대기초부(10)의 중앙부측에서 발생된 수화열 핵부분의 열을 ㄷ자형 강관 파이프(12)로 흐르는 물과 열적 교환을 이루게 하여 수화열의 핵을 분산시키므로 콘크리트의 내부와 외부의 온도차를 줄일 수 있는 특징 있다.Accordingly, the heat of the hydration heat nucleus portion generated at the central portion of the enlarged base portion 10 by the c-shaped steel pipe pipe 12 vertically piped to the enlarged base portion 10 and the water flowing through the c-shaped steel pipe pipe 12; By dissipating nuclei of heat of hydration by thermal exchange, it is possible to reduce the temperature difference between the inside and outside of concrete.
상기와 같이 수화열이 전달된 물은 ㄷ자형 강관 파이프(12)의 바깥측으로 배출되어 바깥측에 채워져 있는 물과 혼합되면서 물의 온도가 일정해진다. 즉, 확대기초부(10)에 타설된 콘크리트의 중앙부분에서 발생된 수화열 및 콘크리트의 표면에서 발생된 수화열이 채워져 있는 물에 의해 동일한 온도를 유지시켜 주는 특징이 있다.The water to which the heat of hydration is transferred as described above is discharged to the outside of the U-shaped steel pipe 12 and mixed with the water filled on the outside, so that the water temperature is constant. That is, there is a feature that maintains the same temperature by the water filled with the heat of hydration generated in the central portion of the concrete poured in the expansion base portion 10 and the heat of hydration generated from the surface of the concrete.
상기 확대기초부(10)를 형성하고 있는 콘크리트가 양생되면서 발생되는 열이 ㄷ자형 강관 파이프(12)를 통해 순환되는 물을 통하여 배출되고, ㄷ자형 강관 파이프(12)를 통하여 온도가 상승되어 배출되는 물은 확대기초부(10)가 잠기도록 채워져 있는 물과 혼합된다.Heat generated while the concrete forming the expanded base portion 10 is cured is discharged through the water circulated through the c-shaped steel pipe pipe 12, and the temperature is increased through the c-shaped steel pipe pipe 12 and discharged. The water to be mixed with the filled water so that the enlarged base portion 10 is submerged.
따라서, ㄷ자형 강관 파이프(12)에 의해 배출되는 물의 반대측 ㄷ자형 강관 파이프(12)의 끝단에는 상승된 물이 배출됨과 동시에 외부측에 있는 물이 인입되면서 순환되기 때문에 물 채움공간부(11)의 물과 ㄷ자형 강관 파이프(12)내를 흐르는 물의 온도는 일정해진다.Accordingly, the water filling space 11 is formed at the end of the U-shaped steel pipe 12 opposite to the water discharged by the U-shaped steel pipe 12, and the water is circulated while the water on the outside is circulated. The temperature of the water and the water flowing in the U-shaped steel pipe 12 is constant.
상기와 같이 물의 순환작용에 의해 콘크리트가 양생되면서 발생되는 수화열을 외부측으로 토출시켜 확대기초부(10)의 표면에서 발생되는 열과 동일한 온도 조건을 맞춰 주므로 수화열로 인한 균열을 미연에 방지할 수 있는 특징이 있다.As described above, by discharging the heat of hydration generated while concrete is cured by the circulation of water to the outside to match the same temperature conditions as the heat generated on the surface of the enlarged base portion 10, it is possible to prevent cracking due to the heat of hydration in advance. There is this.
따라서, 확대기초부(10)를 이루고 있는 콘크리트 덩어리의 내부측 온도 및 외부측 온도가 동일하게 유지되면서 양생되므로 콘크리트에서 발생되는 수화열의 불균형으로 인한 균열은 발생되지 않는 특징이 있다.Therefore, since the inside temperature and the outside temperature of the concrete mass constituting the enlarged base portion 10 are maintained while maintaining the same, there is a characteristic that the crack due to the imbalance of the heat of hydration generated in the concrete does not occur.
상기와 같이 확대기초부(10)의 콘크리트가 완전하게 양생되면 물 채움공간부(11)의 물을 빼버린 후, ㄷ자형 강관 파이프(12)에 모르타르나 그라우팅으로 채움시켜 확대기초부(10)의 콘크리트의 강도를 높여주도록 마무리 작업을 한다.When the concrete of the enlarged base portion 10 is completely cured as described above, the water of the water filling space 11 is drained, and then filled with the mortar or grouting on the C-shaped steel pipe 12 to enlarge the expanded base portion 10. Finish to increase the strength of concrete.
따라서, 본 발명의 매스 콘크리트의 수화열 저감방법에 의해 확대기초부의 내부측과 외부측을 콘크리트 양생시에 온도차를 동일하게 주어 콘크리트의 균열이 발생됨을 억제하여 강도의 저하를 막을 수 있는 효과가 있다.Therefore, by the method of reducing the heat of hydration of the mass concrete of the present invention, the inner and outer sides of the enlarged base portion have the same temperature difference during the curing of the concrete, thereby suppressing the occurrence of cracks in the concrete, thereby preventing the decrease in strength.
또한, 본 발명의 ㄷ자형 강관 파이프의 설치가 용이하므로 적용 할 수 있는 범위가 넓다.In addition, the U-shaped steel pipe of the present invention is easy to install, so the range of application is wide.
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