JP3798947B2 - Deaeration pipe construction method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a deaeration pipe construction method that promotes drying of a concrete frame during and after construction of structures in the field of construction and civil engineering.
[0002]
[Prior art]
Conventionally, construction of reinforced concrete structures or steel reinforced concrete structures, etc. in the field of construction and civil engineering has been done by constructing steel frames, reinforcing bars, etc., assembling formwork around them, and surrounding them with the formwork Concrete is placed in the space. After placing the concrete, it is left for a certain period of time, and the mold is removed after the concrete has hardened. Furthermore, after demolding the formwork, after confirming the degree of drying of the concrete frame such as columns and beams, the construction of the concrete frame is started.
[0003]
The concrete is dried by forced drying by blowing air or warm air from the concrete surface to the concrete surface to promote natural drying or drying, and the moisture content on the surface of the frame is measured to reach a certain standard. After confirming this, the timing for finishing work is decided.
[0004]
[Problems to be solved by the invention]
Columns and beams of the above structure have a predetermined width and thickness, and the moisture content of the concrete frame is different between the surface side and the deep inside, so the moisture content only on the surface side of the frame Determining when to start finishing work by confirming the rate has had a major impact on the finished surface because moisture from the inside of the housing has been absorbed.
[0005]
In addition, when the environment where the structure is constructed is in a place where it is in contact with or close to moisture, such as earth wall or underground structure, the moisture content on the surface side as well as the moisture content inside the housing The rate was also a high numerical value, and the concrete was kept in a high wet state, and performing finishing work in such a state had an adverse effect on the finished surface as described above.
[0006]
Furthermore, ammonia is generated due to the wet state, which has a great influence on the surrounding environment including indoor pollution.
In particular, in art museums and museums, there are cases where the collected or exhibited artworks are discolored by the generated ammonia, and the facilities having clean rooms such as semiconductor factories have an adverse effect on the products.
[0007]
For the above reason, it was necessary to take a sufficient period of time for drying the concrete frame called “withering period” in order to perform the finishing work.
The present invention solves the above-mentioned drawbacks, and promotes the drying of the concrete frame, thereby contributing to shortening the drying period of the frame and reducing the adverse effects on artworks and semiconductor products. Is to provide.
[0008]
[Means for Solving the Problems]
The present invention relates to a concrete deaeration pipe construction method for solving the above-mentioned problems. The deaeration pipe is attached to a part of the structure to be a housing, and moisture and moisture and surplus water inside the concrete after the concrete is placed. Early discharge to the outside accelerates drying of the concrete frame and suppresses ammonia generation.
[0009]
As a specific means, the rear mold is attached to the part of the structure that is located in the longitudinal direction of the deaeration pipe having air permeability , and the upper edge of the deaeration pipe protrudes outside the casing , A deaeration pipe construction method characterized in that concrete is placed in the housing part and the deaeration pipe is used as a passage for exhausting moisture and ammonia of the concrete even after the concrete is hardened and the formwork is removed. Features. The deaeration pipe construction method is characterized by connecting a flexible protective pipe to the deaeration pipe.
[0010]
Furthermore, the degassing pipe, both ends edges and said degassing pipe method comprising attaching into the site to be the skeleton of the structure so as to project to the building frame outside. Further, the present invention is characterized by a degassing pipe construction method in which forced ventilation means is adopted in the degassing pipe for removing moisture in the concrete frame.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 (a) is a front view of a deaeration pipe 1 used in the deaeration pipe method of the present invention, FIG. 1 (b) is a side view thereof, and FIG. The deaeration pipe 1 is formed by inserting a monodrain 2 into a water-permeable sheet 3.
[0012]
The monodrain 2 is obtained by processing a triple tube having a tube diameter of about 20 mm into a single tube.
In addition, as the water permeable sheet 3, a sheet having an eye capable of passing moisture or moisture and water is used. For example, a nonwoven fabric such as a polyethylene sheet is used. Therefore, when the deaeration pipe 1 is disposed, moisture generated from the concrete passes through the water-permeable sheet 3 and enters the monodrain 2 to remove the moisture to the outside. Similarly, surplus water generated at the time of hardening of the concrete after placing the concrete passes through the water-permeable sheet 3 of the deaeration pipe 1 and enters the monodrain 2, and the surplus water is caused to flow down and removed outward.
[0013]
FIG. 3 shows a perspective view of the protective tube 4 having flexibility. The flexible protective tube 4 is a long member subjected to corrugation processing, is easy to bend, and has strength. Moreover, since it is a lightweight member, it can be easily attached to a suitable place.
[0014]
Therefore, the degassing pipe 1 is installed in a portion in a thick concrete frame where it is necessary to deaerate and drain moisture or moisture and water from the inside of the concrete frame, and a thin portion or a bent portion that continues to the thick portion is placed. By using the flexible protective tube 4 continuously with the deaeration pipe 1 for the necessary parts, it is possible to deal with all the parts.
[0015]
The deaeration pipe 1 and the flexible protective tube 4 are connected by appropriate means. For example, the end portion of the deaeration pipe 1 can be inserted into the tube of the flexible protective tube 4, and both can be connected by appropriately winding the outer periphery as the connecting portion with an adhesive tape.
[0016]
【Example】
FIG. 4 is a side sectional view showing a construction method using the deaeration pipe of the present invention, and FIG. 5 is a front sectional view thereof.
A indicates a wall having a thickness such as a seismic wall. The thick wall A is provided with a steel frame 5, a reinforcing bar 6, and the like, and concrete 7 is placed thereon to construct a wall frame. A set-up bar 8 is attached to a horizontal bar or a vertical bar of the reinforcing bar 6, and a deaeration pipe 1 is attached to the set-up bar 8 by a binding bar 9. Accordingly, the deaeration pipe 1 is fixedly disposed in the thick wall A.
[0017]
The position of the deaeration pipe 1 in the wall thickness direction is determined in consideration of the thickness of the thick wall A, the position of the finished surface, and the like. In this embodiment, it is arranged in the thick wall A at a position close to the inner finished surface. Further, the interval between the deaeration pipes 1 is appropriately determined in consideration of the wall thickness, concrete placement environment, and the like. In this embodiment, as shown in FIG. 5, they are arranged at regular intervals of 800 mm.
[0018]
In a thin wall B such as a panel zone in which the wall thickness continuous with the thick wall A becomes thin, a flexible protective tube 4 is connected and attached to the deaeration pipe 1. Since the flexible protective tube 4 can be bent, it can be piped even at a portion where the wall thickness changes or a portion where the steel frame 5 or the reinforcing bar 6 is arranged in a complicated manner.
[0019]
In this embodiment, the deaeration pipe 1 is disposed at a vertical position in the thick wall A, and a flexible protective tube 4 is connected to the upper end of the deaeration pipe 1 and bent while being bent. The upper edge portion 11 protrudes from the thin wall B to the outside. The two are connected by wrapping an adhesive tape or the like across both pipes so that they are not dropped off or separated.
[0020]
The deaeration pipe 1 is fixed to a setup bar 8 attached to a reinforcing bar 6 or the like by a binding means of a binding bar 9. The deaeration pipe 1 is connected to the flexible protective tube 4, the flexible protective tube 4 is bent as appropriate, and the upper edge portion 11 is piped so as to protrude from the wall. The flexible protective tube 4 is also appropriately attached to the reinforcing bar 6 or the like.
[0021]
After the piping of the deaeration pipe 1 and the like is completed, a formwork is assembled on the side surfaces of walls and beams and concrete is placed. At the time of placing the concrete, in order to prevent the concrete from entering the pipe from the lower edge part 10 of the deaeration pipe 1 and the upper edge part 11 of the flexible protective pipe 4, the part is attached with an adhesive tape or the like. It is blocked by means of After the concrete is placed, at least the closing means 12 of the upper edge 11 is removed and the tip is opened.
[0022]
Further, if necessary, the lower edge portion 10 of the deaeration pipe 1 can be protruded to the outside, and both the upper and lower edge portions can be communicated with the outside. In this case, the closing means 13 of the lower edge portion 10 is removed.
[0023]
Due to the opening of the upper edge 11, the moisture discharged from the placed concrete enters the monodrain 2 of the deaeration pipe 1 through the water-permeable sheet, moves upward and is discharged to the outside, and thickens the drying of the concrete frame. This can be performed from the inside of the wall A.
[0024]
Further, by projecting the lower edge portion 10 of the deaeration pipe 1 to the outside, surplus water generated after placing the concrete is allowed to enter the monodrain 2 of the deaeration pipe 1 through the water permeable sheet 3. At the same time, the moisture moves upward and is discharged to the outside in the same manner as described above, and the concrete frame can be dried from the inside of the thick wall A.
[0025]
The removal of moisture can be performed by natural ventilation means, but by adopting forced ventilation means for sending dry air from one side into the deaeration pipe 1 and exhausting from the other side, the concrete wall It is also possible to further promote the drying of the body.
[0026]
【The invention's effect】
The deaeration pipe construction method of the present invention can dry the concrete frame from the inside thereof, promotes drying after the concrete is placed, and shortens the construction period of the structure.
[0027]
Moreover, by drying the concrete casing from the inside, ammonia generated due to the wet state of the concrete can be suppressed, and the indoor environment can be improved.
[0028]
Furthermore, natural ventilation, forced ventilation, and the like can be easily employed as needed for drying the concrete frame. Further, since a flexible pipe material can be used in combination, it can be refracted freely, and the deaeration pipe method of the present invention can be adopted even in a thin wall or a complicated place.
[Brief description of the drawings]
1A is a front view of a deaeration pipe, FIG. 1B is a side view of the deaeration pipe, FIG. 2 is a development view of the deaeration pipe, and FIG. 3 is a perspective view of a flexible protective tube. Side cross-sectional view with air pipe and flexible protective tube installed [Fig. 5] Front cross-sectional view with deaerated pipe installed [Explanation of symbols]
A ・ ・ Thick wall B ・ ・ Thin wall 1 ・ Deaeration pipe 2 ・ ・ Monodrain 3 ・ ・ Permeable sheet 4 ・ ・ Flexible protective tube 5 ・ ・ Steel 6 ・ ・ Reinforcement 7 ・ ・ Concrete 8 ・9 .. Bundling muscle 10.. Lower edge 11.. Upper edge 12.

Claims (4)

A rear formwork is assembled by attaching a deaeration pipe having air permeability in the longitudinal direction and the upper edge of the deaeration pipe projecting outside the housing , and then assembling the rear formwork. A degassing pipe construction method characterized in that a passage for discharging moisture and ammonia of the concrete is provided in the degassing pipe even after the concrete is placed and the concrete is hardened and the formwork is removed . The deaeration pipe construction method according to claim 1, wherein a flexible protective pipe is connected to the deaeration pipe. 3. The deaeration pipe construction method according to claim 1 or 2, wherein the deaeration pipe is attached to a part of the structure to be a casing of the structure so that both end edges protrude outside the casing. The deaeration pipe construction method according to any one of claims 1 to 3, wherein forced ventilation means is adopted in the deaeration pipe for removing moisture in the concrete frame.

Images