JPH05331969A - Concrete reinforcement and reinforced cage - Google Patents

Abstract

PURPOSE:To facilitate production, conveyance, arrangement working and mutual connection of reinforcing bars, to eliminate the necessity of skilled work and to promote dynamic performance. CONSTITUTION:Concrete reinforcing bars are so constituted that a required number of ribs 4a, 4b and 4c are spread between webs 3a and 3b opposed to half cut bodies 2a and 2b of a linear steel pile sheet in the direction of a long axis at set intervals. The concrete reinforcing bars are fitted with joints to form a reinforced cage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete rebar mainly used in civil engineering, construction, and marine structures and used in various industrial fields, and a rebar cage for concrete formed by using the concrete rebar.

[0002]

2. Description of the Related Art As concrete reinforcing bars, round steel and deformed steel bars specified in Japanese Industrial Standard JIS-G-3112 reinforced concrete steel bars are used, and for large structures, the round steel bars and deformed steel bars are assembled. Rebar cages are used.

[0003]

The round bar and the deformed bar steel have high mechanical performance, can be mass-produced, are relatively cheap in price, have a reliable structure, and are widely used in various industries. When using it for concrete rebar, it is necessary to assemble and assemble it into a predetermined shape by tying and arranging the rebar using a numbered wire according to the design. This assembly requires a high degree of skill work by a skilled bar arranging worker, and if inaccurate or incorrect bar arranging is performed, there is a problem that the concrete structure cannot retain the desired strength. In the case of reinforcing bars for large-scale concrete structures, round steel or deformed steel bar with a large cross-sectional area must be used to meet the strength requirements, but as the cross-sectional area increases, transportation, bending,
It becomes geometrically difficult to connect and build the reinforcing bars,
There is a problem that work costs will rise. The purpose of the present invention is to
It is to provide concrete rebar which is easy to manufacture, transport, rebar processing, interconnecting and erection of rebar, and is economical, and yet another purpose is easy to assemble, good mechanical performance and workability. The object of the present invention is to provide a rebar cage for concrete, which is particularly suitable for economically constructing large-diameter and long concrete columns or piles.

[0004]

In order to solve the above problems and to achieve the object, the present invention provides a concrete rebar in which rib members are stretched between webs of opposing straight-lined steel sheet pile halves at a set interval. A concrete reinforcing bar is provided in which rib members are stretched at predetermined intervals between web projections of opposing linear steel sheet pile honeycomb halves, and the reinforcing bars are vertically fixed to the rib members. Reinforcing bar for concrete, which is further provided with a concrete reinforcing bar and a reinforcing bar basket for concrete formed by connecting joints of the concrete bars to form a closed cross section, and a reinforcing bar basket for concrete in which any number of the reinforcing bar baskets are vertically connected. To solve the above problems and achieve the purpose.

The concrete rebar according to the present invention comprises a plate, a rod, and a bar between half-webs of straight steel sheet piles having full-strength joints.
Since it is a simple structure in which steel materials such as shaped steel are used as rib materials and stretched at set intervals, it is easy to manufacture and has high structural strength.
It is possible to face any size by joint connection, and it does not require any skill for joining, assembling, building, etc., so it is particularly suitable for large-scale concrete structure reinforcing bars and enables economical construction. .. Further, since the rib material can be easily stretched at an arbitrary set interval and the discretion range regarding the steel material density is extremely wide, the degree of freedom in design is very high. Furthermore, since there are many cavities in terms of morphology, there is no concern about the adhesion strength with concrete. Furthermore, in the case of concrete rebar in which rib members are stretched at a set interval between the web protrusions of the opposing linear steel sheet pile honeycomb halves,
In addition to the above advantages, stress concentration at the welded portion of the rib material can be alleviated, so that higher reliability can be expected.

[0006] Further, the concrete reinforcing bar which is a concrete reinforcing bar in which a reinforcing vertical reinforcing member is vertically fixed to a rib member has a function to withstand a high load, and therefore has a larger scale. Suitable for body reinforcement. Next, a rebar cage for concrete, which is formed by forming a closed cross section by jointly joining the various concrete rebars,
Compared with conventional rebar cages made from round steel, etc., it has higher structural strength, better dimensional stability, is easier to manufacture, requires less skill, and can be manufactured in a short period of time. ,
High economic efficiency can be expected. Furthermore, since the reinforced cage for concrete has good morphological stability and has a function of easily joining in the vertical direction, the reinforced cage for concrete in which any number of the reinforced cages are vertically installed is It is easy to manufacture even in a bad work place and can be built efficiently, so
In particular, it exerts a high economic effect in the field of constructing concrete structures for high loads in difficult-to-construct locations such as concrete columns and piles for bridges in mountains and harbors.

[0007]

1 and 2 are partial schematic perspective views of concrete rebars 1a and 1b according to the present invention, and 2a and 2b are straight steel sheet pile halves which are the constituents of the concrete rebars 1a, 2c, Reference numeral 2d is a straight steel sheet pile half-cut body which is a structural body of the concrete rebar 1b. Further, 3a, 3b and 3c, 3d are webs of the linear steel sheet pile half-cut bodies 2a, 2b and 2c, 2d which face each other, and 4a-
Reference numeral 4c denotes webs 3a and 3b of the straight steel sheet pile half-cut body 2a.
Shows rib members stretched in parallel at set intervals between 4d ~
Reference numeral 4g indicates a rib material stretched between the webs 3c and 3d by a truss at set intervals. The concrete rebar 1a, 1
In b, rib members 4a to 4g made of flat steel are butt-welded to the webs 3a, 3b and 3c, 3d. Since the concrete rebars 1a and 1b are provided with the full-strength joints 5a to 5d, it is possible to easily obtain the desired rebar shape by joining any number of joints, and the rib members 4a to 4g. Since the steel material density can be set arbitrarily by setting the appropriate dimension, the degree of freedom in design is extremely high, and in addition, since there are many cavities morphologically, the adhesive strength with concrete is large and It is possible to use a reliable reinforcing bar. Further, since the structure is simple and no skilled skill is required for joining, the work of assembling and arranging the reinforcing bar is easy, and the construction cost is low, so that it has an excellent economical efficiency.

Next, FIGS. 3 and 4 are partial perspective views of concrete rebars 1c and 1d according to the present invention, in which the adhesive strength represented by reference numeral 6 is represented by the straight steel sheet pile halves 2e and 2f of the concrete rebar 1c. Reinforcement studs are planted, and reinforcing ribs 7 made of strips are vertically fixed to the middle portion of each rib 4h.
A round steel 8 which is a vertical reinforcing bar having a high strength against an acting force such as bending is vertically fixed to the middle portion of each rib member 4i. Rib material 4 shown in the concrete rebars 1a to 1d
In addition to sheet steel, shaped steel or bar steel can be used as a to 4i, if necessary.
A pipe or a shaped steel material may be used in addition to the plate steel material such as No. 8 and the round steel material. In the present invention, the rib material and the reinforcing vertical reinforcement material are used in that sense.

Further, the concrete rebars 1e and 1f shown in FIGS. 5 and 6 are straight steel sheet pile half halves 2g, 2h and 2 respectively.
This is an example in which rib materials denoted by reference numerals 4j and 4k are overlapped and welded to i and 2j, respectively, and has a wide dimensional margin and good workability.
Further, the concrete rebars 1g and 1h in FIGS. 7 and 8 and the concrete rebars 1i and 1j in FIGS. 9 and 10 are CT section steels 9, H section steels 10 and a plurality of round steels 11 as longitudinal reinforcing bars, respectively. It is an example using a hexagonal steel bar 12, the required strength as a reinforcing bar material, morphological compatibility,
It goes without saying that it is desirable to select it in consideration of workability.

Next, the concrete rebars 1k and 1m shown in FIGS. 11 and 12 are the honeycomb webs 3e, 3f and 3 of the linear steel sheet pile halves 2k, 2m and 2n, 2p.
In g and 3h, rib members 4m and 4n made of flat steel are welded and fixed between the protrusions represented by reference numerals 13 and 14, respectively. When the tensile force acts on the concrete rebars 1k and 1m, the opposing force against stress concentration is large,
High mechanical reliability.

13, FIG. 14 and FIG. 15 show bent rib members 4p, which are mainly used for forming a closed cross section.
FIG. 4 is a partial schematic perspective view of concrete rebars 1n, 1p and 1q having 4q and 4r.
The rib members 4q and 4r of p and 1q have reference numerals 15 and 16
A vertical reinforcing bar made of round steel and square steel pipe, which is representative of the above, is vertically fixed. The dimensions of the rib members 4p to 4r and the applied bending angles are determined, for example, according to the design dimensions of a reinforcing bar cage having an arc-shaped cross section described later.

Next, FIG. 16 shows concrete rebar 1r,
17a is a schematic perspective view showing a situation in which 1s is installed vertically,
Reference numeral 17b indicates a joint plate, and reference numerals 18a and 18b indicate connection vaults. Reference numeral 19 is a vertical reinforcing bar for reinforcing the concrete reinforcing bar 1r, 20 is a vertical reinforcing bar for reinforcing the concrete reinforcing bar 1s,
The reinforcing vertical reinforcing member 20 is supported movably in the vertical and horizontal directions via a guide strip 21 fixed to the rib member 4s. Reference numeral 22 is a stopper metal fitting attached to the reinforcing vertical reinforcing bar member 20 itself.
0 does not descend from the contact point between the guide band metal member 21 and the stopper metal member 22. Reference numeral 23 is a coupler previously attached to the reinforcing vertical reinforcing member 19, and when the concrete reinforcing bars 1r and 1s are installed vertically, the reinforcing vertical reinforcing member 20 is inserted into the inner cavity of the coupler 23, and as required. Longitudinal reinforcement 1 for reinforcement by means of bonding, welding or crimping
Connect 9 and 20.

FIG. 17 is a schematic plan view of a reinforcing bar cage 25 for concrete, which is formed by connecting joints of concrete reinforcing bars 24, which are represented by the reference numeral 24, in an arcuate closed cross section.
Is a schematic plan view of a rebar cage 28 formed by joining joints of concrete rebars 27 having a reinforcing vertical bar made of round steel represented by reference numeral 26 to form an arcuate closed cross section, and FIG. Is a schematic plan view of a reinforcing bar cage 31 for concrete, which is formed by forming a circular arc-shaped closed cross-section by jointly joining concrete reinforcing bars 30 having different reinforcing vertical bar members 29. A smaller diameter rebar cage may be concentrically arranged in the inner cavity. Further, although not shown, the concrete rebars adjacent to each other by the joint joining are fixed to each other by using an appropriate fixing means such as partial welding of the joint portion or joint plate connection.

A feature of the present invention is that a rebar cage having a desired size and shape according to the design strength, such as the rebar cages 25, 28, 31 for concrete, can be quickly and accurately manufactured without requiring special skill. There is something that can be built. Figure 20
Fig. 34 is a schematic cross-sectional view showing a situation in which a reinforcing bar cage 33 for concrete, which is constructed by vertically arranging a plurality of concrete reinforcing bars according to the present invention, is built in an excavation hole in the ground 32 for building a foundation pile for a bridge in a mountain. Indicates a liner plate for Yamadome. INDUSTRIAL APPLICABILITY As described above, the reinforcing bar cage of the present invention enables economical construction of a large-scale concrete structure even in a place where the working environment is bad such as a mountain bridge. Next, as the unit dimension according to the embodiment, the width, that is, the distance between all the strong joints is 1,100 m.
Using concrete rebar with m and length of 11,500 mm, we made a rebar cage for concrete with an outer diameter of 2,800 mm.
We succeeded in achieving the desired results.

FIG. 21 is a schematic plan view of a concrete rebar 1t according to a different embodiment.
The t has a rib material 4t bent to have a set radius of curvature for forming a circular closed cross-section rebar cage, and a plurality of reinforcing vertical bars 35 made of deformed rebar bars 35 are provided outside the rib material 4t.
Is stuck. FIG. 22 shows the concrete rebar 1
FIG. 23 is a schematic plan view showing a state in which a plurality of t are joined together to form a circular closed cross section rebar cage 36, and FIG. 23 is a schematic front view of the circular closed cross section rebar cage 36. In the lower part of the circular closed cross-section reinforcing bar basket 36, the reinforcing vertical reinforcing member 35 may be unnecessary in terms of strength, and as shown in FIG. 23, the reinforcing vertical reinforcing member 35 may be omitted in the lower part. ..

Next, some of various forms of the rib material according to the present invention are shown in schematic explanatory views of FIGS. 24, 25 and 26.
FIG. 24 shows a rib material 4u made of steel bar between the straight steel sheet pile halves 2a and 2b, and FIG. 25 shows a rib material 4 made of rectangular steel plate.
FIG. 26 shows an example in which a rib material 4w made of a drum-shaped steel plate is stretched, and thus, in the present invention, a steel plate having an appropriate shape is processed and used in addition to a steel bar, a bar steel, a steel pipe and the like. However, the straight steel sheet pile half-cut body does not have to be cut halfway from the center of the web, and may be cut vertically from an appropriate portion of the web according to demand.

[0017]

INDUSTRIAL APPLICABILITY The concrete rebar of the present invention is easy to manufacture, can be mass-produced, and is easy to carry, rebar, interconnect and reinforce, and is extremely economical. .. Further, the rebar cage for concrete of the present invention has excellent mechanical performance and good workability, and therefore is suitable for economically constructing a large-diameter and long concrete column or pile. In addition, since the degree of freedom in dimension design is wide and products with the desired strength can be manufactured at an economical cost,
It is extremely useful when constructing concrete structures in places where the working environment is poor, such as deep foundation piles and harbor bridges in mountainous areas.

[Brief description of drawings]

FIG. 1 is a partial schematic perspective view of a concrete reinforcing bar according to the present invention.

FIG. 2 is a partial schematic perspective view showing another example of the concrete rebar according to the present invention.

FIG. 3 is a partial schematic perspective view showing another example of the concrete rebar according to the present invention.

FIG. 4 is a partial schematic perspective view showing another example of the concrete reinforcing bar according to the present invention.

FIG. 5 is a partial schematic perspective view of the concrete rebar in the present invention, in which the rib material is overlapped and welded to the linear steel sheet pile half body.

FIG. 6 is a partial schematic perspective view showing another example of the concrete rebar in the present invention, in which the rib material is overlapped and welded to the linear steel sheet pile half body.

FIG. 7 is a partial schematic perspective view of a concrete reinforcing bar of the present invention, in which a rib material is lap-welded to a straight-lined steel sheet pile half body and a reinforcing vertical reinforcing material is vertically fixed to the rib material. Is.

FIG. 8 is another example of the concrete rebar of the present invention, in which a rib material is lap-welded on a straight-lined steel sheet pile half body, and a reinforcing vertical bar material is vertically fixed to the rib material. It is a partial schematic perspective view shown.

FIG. 9 is another example of the concrete reinforcing bar of the present invention, in which the rib material is lap-welded to the linear steel sheet pile half-body and the reinforcing vertical bar is vertically fixed to the rib material. It is a partial schematic perspective view showing.

FIG. 10 is a concrete reinforcing bar according to the present invention,
It is a partial schematic perspective view which shows the other example of the reinforcing bar material in which the rib material is lap-welded to the linear steel sheet pile half-body, and also the reinforcing vertical reinforcement material is vertically fixed to the rib material.

FIG. 11 is a concrete reinforcing bar according to the present invention,
It is a partial schematic perspective view concerning an example in which a linear steel sheet pile half-body was formed on a honeycomb web and a rib material was welded and fixed between the projections.

FIG. 12 is a concrete reinforcing bar according to the present invention,
FIG. 6 is a partial schematic perspective view according to another embodiment in which a linear steel sheet pile half body is formed on a honeycomb web and rib members are welded and fixed between the protrusions.

FIG. 13 is a partial schematic perspective view of a concrete rebar having a bent rib material used when forming a closed cross section.

FIG. 14 is a partial schematic perspective view of a concrete reinforcing bar in which a reinforcing vertical reinforcing member is vertically fixed to a bent rib member used when forming a closed cross section.

FIG. 15 is a partial schematic perspective view showing another example of a concrete reinforcing bar in which a reinforcing vertical reinforcing member is vertically fixed to a bent rib member used when forming a closed cross section.

FIG. 16 is a schematic perspective view showing a situation where concrete reinforcing bars are installed vertically.

FIG. 17 is a schematic plan view of a reinforcing bar basket for concrete which is formed by joining joints of concrete reinforcing bars to form an arcuate closed cross section.

FIG. 18 is a schematic plan view of a reinforcing bar basket formed by joint-joining concrete reinforcing bars having reinforcing vertical reinforcing members to form an arcuate closed cross section.

FIG. 19 is a schematic plan view of a reinforcing bar basket formed by joint-joining concrete reinforcing bars having reinforcing vertical reinforcing members to form an arcuate closed cross section.

FIG. 20 is a schematic cross-sectional view showing a state in which a rebar cage for concrete is built.

FIG. 21 is a schematic plan view of a concrete reinforcing bar according to another embodiment.

FIG. 22 is a schematic plan view showing a state in which a plurality of concrete reinforcing bars are combined to form a circular closed-section reinforcing bar cage.

FIG. 23 is a schematic front view of a circular closed section rebar cage.

FIG. 24 is a schematic explanatory diagram of a rib material used in an example of the present invention.

FIG. 25 is a schematic explanatory view showing another example of the rib material used in the examples of the present invention.

FIG. 26 is a schematic explanatory view showing still another example of the rib material used in the examples of the present invention.

[Explanation of symbols]

 1a to 1t Concrete rebar 2 Linear steel sheet pile half-cut body 2a to 2p Linear steel sheet pile half-cut body 3a to 3d Web 3e to 3h Honeycomb web 4 Rib material 4a to 4w Rib material 5a to 5d Full strength joint 6 Stud for strengthening adhesion strength 7-12 Reinforcing vertical bars 13,14 Protrusions 15,16 Reinforcing vertical bars 17a, 17b Joint plates 18a, 18b Connection vault 19,20 Reinforcing vertical bars 21 Guide strips 22 Stopper fittings 23 Coupler 24 Concrete Reinforcing bar 25 Reinforcing bar basket 26 Reinforcing vertical bar material 27 Concrete reinforcing bar 28 Reinforcing bar basket 29 Reinforcing vertical bar material 30 Concrete reinforcing bar 31 Reinforcing bar basket 32 Ground 33 Reinforcing bar basket 34 Yamadome liner plate 35 Reinforcing vertical bar material 36 Reinforcing bar basket

Claims (5)

[Claims] 1. A concrete rebar in which rib members are stretched at predetermined intervals between webs of opposing linear steel sheet pile halves. 2. A concrete rebar in which rib members are stretched at predetermined intervals between web protrusions of opposing linear steel sheet pile honeycomb halves. 3. A concrete rebar in which a reinforcing vertical reinforcing member is vertically fixed to the rib material according to claim 1. 4. A rebar cage formed by joining joints of concrete rebars formed by tensioning rib members at predetermined intervals between webs of opposing straight steel sheet pile halves and forming a closed cross section. 5. The rebar cage according to claim 4, wherein a number of rebar cages are vertically arranged.