JP2007247366A - Columnar reinforced concrete structure member and its construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a columnar reinforced concrete structure member and its construction method, capable of shortening curing time of placed ready-mixed concrete, and capable of improving composite strength of a column itself. <P>SOLUTION: This construction method of the columnar reinforced concrete structure member 100 forms a columnar structural member, by placing the ready-mixed concrete in a state of arranging a main element composed of a structural main reinforcement 11 and a horizontal restricting reinforcement 12 orthogonal to the structural main reinforcement. Mesh pipes 1 and 2 formed of high tension resin fiber are arranged in the main element. The ready-mixed concrete is filled in order in a space composed of the mesh pipes and a concrete form from the inside of the mesh pipes. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a columnar reinforced concrete structural member formed as a pillar of a building such as a building and a construction method thereof.

  Starting with the seismic strength disguise case of condominiums, interest in the structure and strength of buildings is increasing. In the case of buildings such as buildings, it is a well-known fact that the strength of columnar reinforced concrete structural members greatly affects the earthquake resistance and durability of the entire building. Various structural members have been proposed (see, for example, Patent Document 1). In a reinforced concrete structural member, the amount of reinforcing bars is a factor that significantly affects the strength of the structural member, but the strength of the concrete itself due to the components of the concrete and the quality of the curing also has a significant effect on the strength of the structural member.

  A conventional method of constructing columnar reinforced concrete structural members is a method in which the main elements composed of structural main reinforcing bars and transversely constrained reinforcing bars perpendicular to them are surrounded by a concrete formwork, and ready-mixed concrete is placed in the formed space. Was common. Accordingly, there is a problem that the structural member having a larger diameter or cross-sectional area takes longer to cure.

However, the larger the structural member, the greater the effect on strength, so the curing cannot be neglected. In addition, it is considered that a method of arranging or blending other materials inside the concrete to achieve composite strengthening is also effective.
Japanese Patent Laid-Open No. 2002-6122, page 3 to page 4

  Therefore, the present invention has been made in view of the above-described conventional problems, and a columnar reinforced concrete structural member that can shorten the curing time of cast concrete that has been placed and that can improve the composite strength of the column itself, and a construction method thereof. The purpose is to provide.

The columnar reinforced concrete structural member of the present invention is a main element composed of a standing concrete frame, and a structural main reinforcing bar and a laterally constrained reinforcing bar perpendicular to the structural main reinforcing bar, embedded in the concrete frame, And a mesh pipe formed of a high-strength resin fiber is embedded in the main element.
According to the said structure, in addition to a reinforcing bar, the composite reinforcement | strengthening of the concrete by a mesh pipe can be aimed at.

Moreover, the columnar reinforced concrete structural member of the present invention is the columnar reinforced concrete structural member according to claim 1, wherein a plurality of the mesh pipes are embedded in the main element.
According to the said structure, the composite reinforcement | strengthening of the concrete by a some mesh pipe can be aimed at.

The columnar reinforced concrete structural member according to the present invention is the columnar reinforced concrete structural member according to claim 1 or 2, wherein the mesh pipe is extended by inserting ends having substantially the same diameter. .
According to the said structure, the pillar of the concrete strengthened by the mesh pipe can be comprised arbitrarily arbitrarily.

The columnar reinforced concrete structural member of the present invention is the columnar reinforced concrete structural member according to any one of claims 1 to 3, wherein the mesh pipe is bent at a right angle at an end of the main element, and the ceiling portion or the floor portion. It is characterized by being arranged.
According to the said structure, a structural member and a ceiling part or a floor part can be combined more firmly.

The columnar reinforced concrete structural member of the present invention is the columnar reinforced concrete structural member according to claim 2, wherein the plurality of embedded mesh pipes include pipes having different diameters arranged concentrically. Features.
According to the said structure, the lamination | stacking composite reinforcement | strengthening of the concrete by a some mesh pipe can be aimed at.

The method for constructing a columnar reinforced concrete structural member of the present invention is a columnar structure formed by placing ready-mixed concrete in a state where a main element composed of a structural main reinforcing bar and a laterally constrained reinforcing bar orthogonal to the structural main reinforcing bar is disposed. A method of constructing a columnar reinforced concrete structure member forming a member, wherein a mesh pipe formed of high-tensile resin fiber is disposed in the main element, and the filling of fresh concrete is performed from the inside of the mesh pipe to the mesh. It is characterized in that it is performed sequentially in a space composed of a pipe and a concrete formwork.
According to the said method, since concrete placement is performed in steps, the curing time can be shortened. In addition to reinforcing bars, it is possible to reinforce the concrete with mesh pipes.

Moreover, the construction method of the columnar reinforced concrete structural member of the present invention is the construction method of the columnar reinforced concrete structural member according to claim 6, wherein a plurality of the mesh pipes are embedded in the main element. It is characterized by.
According to the said method, since concrete placement is performed in steps, the curing time can be shortened. Moreover, the composite reinforcement | strengthening of the concrete by a some mesh pipe can be aimed at.

Moreover, the construction method of the columnar reinforced concrete structure member of the present invention is the construction method of the columnar reinforced concrete structure member according to claim 6 or 7, wherein the mesh pipe has a substantially same diameter at the end after filling with ready-mixed concrete. Another mesh pipe is inserted and extended.
According to the said method, since concrete placement is performed in steps, the curing time can be shortened. In addition, the concrete columns reinforced with mesh pipes can be made arbitrarily high.

Moreover, the construction method of the columnar reinforced concrete structure member of the present invention is the construction method of the columnar reinforced concrete structure member according to any one of claims 6 to 8, wherein the mesh pipe is perpendicular to the end of the main element. It is bent and disposed on the ceiling or floor.
According to the said method, since concrete placement is performed in steps, the curing time can be shortened. In addition, the structural member and the ceiling or floor can be more firmly coupled.

Moreover, the construction method of the columnar reinforced concrete structural member of the present invention is the method of constructing the columnar reinforced concrete structural member according to claim 7, wherein the mesh pipe has concentrically arranged pipes having different diameters. The filling of the ready-mixed concrete is characterized in that the inner mesh pipe having a small diameter is sequentially performed from the outer mesh pipe.
According to the said method, since concrete placement is performed in steps, the curing time can be shortened. In addition, it is possible to reinforce the concrete with a plurality of mesh pipes.

  ADVANTAGE OF THE INVENTION According to this invention, the curing time of the concrete in a columnar reinforced concrete structural member can be shortened, and the intensity | strength of pillar itself can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing a configuration of a columnar reinforced concrete structural member according to an embodiment of the present invention. The columnar reinforced concrete structural member 100 is mainly composed of a main element 10 composed of a structural main rebar 11 and a laterally constrained reinforcing bar 12, mesh pipes 1 and 2 disposed inside the main element 10, and a concrete frame 20. Is done.

  The columnar reinforced concrete structural member 100 is constructed by surrounding a main element 10 composed of a structural main reinforcing bar 11 and a laterally constrained reinforcing bar 12 with a concrete formwork and placing ready-mixed concrete in a space constituted by the formwork. . The construction method of the columnar reinforced concrete structural member according to the embodiment of the present invention is performed after inserting and arranging mesh pipes 1 and 2 formed of high-tensile resin fibers in the main element 10 formed in a rectangular tube shape. Place concrete.

  Next, the concrete construction method of the columnar reinforced concrete structural member in the embodiment of the present invention will be described. First, of the two mesh pipes 1 and 2 arranged as shown in FIG. 1, the inside of the mesh pipe 1 (region indicated by A in the figure) is filled with ready-mixed concrete. Next, fresh concrete is similarly filled into the space formed by the mesh pipe 1 and the mesh pipe 2 (region indicated by B in the figure). Finally, the space formed by the pipe 2 and the concrete mold (region indicated by C in the figure) is filled with ready-mixed concrete. Through the above filling procedure, the entire concrete frame 20 is formed. In addition, when supplying ready-mixed concrete from a concrete mixer truck or the like, if the mesh pipe has the same diameter as the supply hose, it can be supplied effectively.

  Since the pipe surfaces of the mesh pipes 1 and 2 are mesh, the mesh pipes 1 and 2 are air permeable and water permeable, and air and excess water caught in the ready-mixed concrete at the time of filling are discharged from the pipe surface. Therefore, the ready-mixed concrete is appropriately filled, and deterioration of the quality of the concrete due to air bubbles and excess moisture can be prevented. In addition, since the ready-mixed concrete is placed step by step in the pillars that serve as structural members, drying is quicker and the curing time is shortened compared to the case where ready-mixed concrete for the entire pillar is placed at once. The construction period can be shortened.

  FIG. 2 is a view for explaining a situation in which a structural member is extended by adding a mesh pipe. As shown in the figure, the mesh pipe 1 is filled with ready-mixed concrete and solidified, and then the mesh pipe 3 having substantially the same diameter is inserted from above. Furthermore, after fixing with the fixing ring 4, the ready-mixed concrete is filled. In this way, it is possible to cope with a structural member of any height.

  On the other hand, the outer mesh pipe 2 can be extended by adding a pipe having the same diameter as the mesh pipe 2 after the ready concrete filled in the mesh pipe 3 is solidified and filling the ready-mixed concrete in the same manner. At this time, it is preferable in terms of strength that the seam position of the mesh pipe 1 (portion fixed by the fixing ring) and the seam position of the mesh pipe 2 do not coincide by shifting alternately.

  In the example shown in FIGS. 1 and 2, two mesh pipes are arranged concentrically in the main element 10, but the present invention is not limited to this, and it is configured in three or more multilayers. A configuration may be adopted in which a mesh pipe is inserted and disposed. In this case, since a concrete layer is formed in an annual ring shape in the structural member, mechanical properties such as bending strength and shear strength can be remarkably improved by lamination strengthening. Further, since the ready-mixed concrete is placed in multiple stages, the amount of filling at one time is small, and therefore the curing time can be further shortened.

  Next, FIG. 3 is a figure for demonstrating the condition which bends the mesh pipe extended upwards and is arrange | positioned in a ceiling part. In the example of the figure, four mesh pipes 1 disposed at the four corners of the main element 10 are bent and disposed in the ceiling portion 30. In this case, the ready-mixed concrete is filled from the end side of the mesh pipe extending in the horizontal direction in the ceiling portion 30. By setting it as such a structure, the coupling | bonding of the ceiling part 30 and a columnar reinforced concrete structure member can be made stronger.

  In the example shown in FIG. 3, four mesh pipes are inserted into the main element 10, but this is not a limitation. In addition, the method of bending and arranging the mesh pipe can be applied to the floor portion in the same manner, and the connection between the floor portion and the columnar reinforced concrete structural member can be made stronger.

  The columnar reinforced concrete structural member and its construction method according to the present invention have the effects of improving the strength of the structural member and shortening the construction period, and are useful in the construction of reinforced concrete structural members of buildings such as buildings.

  It is a figure which shows the structure of the columnar reinforced concrete structure member in embodiment of this invention.   It is a figure for explaining the situation where a mesh pipe is added and a structural member is extended.   It is a figure for demonstrating the condition which bend | folds the mesh pipe extended upwards and is arrange | positioned in a ceiling part.

Explanation of symbols

1 Mesh pipe (inside)
2 Mesh pipe (outside)
3 Mesh pipe (for extension)
4 Retaining Ring 10 Main Element 11 Structural Main Reinforcement 12 Lateral Restraint Reinforcement 20 Concrete Frame 30 Ceiling Part 100 Columnar Reinforced Concrete Structure Member

Claims (10)

A standing concrete frame;
Embedded in the concrete frame, comprising a main element composed of structural main reinforcing bars and transversely restrained reinforcing bars orthogonal to the structural main reinforcing bars,
A columnar reinforced concrete structural member characterized in that a mesh pipe formed of high-strength resin fibers is embedded in the main element.   The columnar reinforced concrete structure member according to claim 1, wherein a plurality of the mesh pipes are embedded in the main element.   The columnar reinforced concrete structure member according to claim 1 or 2, wherein the mesh pipe is extended by inserting ends having substantially the same diameter.   The columnar reinforced concrete structure member according to any one of claims 1 to 3, wherein the mesh pipe is bent at a right angle at an end of the main element and disposed on a ceiling portion or a floor portion.   3. The columnar reinforced concrete structure member according to claim 2, wherein the plurality of embedded mesh pipes are pipes having different diameters arranged concentrically. A method for constructing a columnar reinforced concrete structural member that forms a columnar structural member by placing ready-mixed concrete in a state where a main element composed of a structural main reinforcing bar and a laterally constrained reinforcing bar orthogonal to the structural main reinforcing bar is disposed. There,
A mesh pipe made of high-strength resin fibers is disposed in the main element, and ready-mixed concrete is sequentially filled from the inside of the mesh pipe into a space formed by the mesh pipe and the concrete formwork. The construction method of the columnar reinforced concrete structure member characterized by the above-mentioned.   The construction method for a columnar reinforced concrete structure member according to claim 6, wherein a plurality of the mesh pipes are embedded in the main element.   The method for constructing a columnar reinforced concrete structure member according to claim 6 or 7, wherein the mesh pipe is extended by inserting another mesh pipe having substantially the same diameter at the end after filling with the ready-mixed concrete.   The construction method for a columnar reinforced concrete structure member according to any one of claims 6 to 8, wherein the mesh pipe is bent at a right angle at an end of the main element and disposed on a ceiling portion or a floor portion. .   In the mesh pipe, pipes having different diameters are concentrically arranged, and the filling of the ready-mixed concrete is performed in order from an inner mesh pipe having a smaller diameter to an outer mesh pipe. The construction method of the columnar reinforced concrete structure member according to claim 7.

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