JP2519925B2 - Joint structure of reticulated reinforcing member and its construction method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a joint structure of a net-like reinforcing member and a construction method thereof, and particularly to a reinforcing member embedded in a pillar or a beam of a concrete structure. The present invention relates to a joint portion structure of a net-like reinforcing member that is suitable for joining in the direction and a construction method thereof.

"Prior art" For example, for columns in reinforced concrete structures,
In order to further shorten the construction period by omitting the work of assembling the reinforcing bars at the site, a pillar reinforcing bar cage that is assembled in a cage shape by preliminarily winding the shear reinforcing bars (belts, ribs or spirals etc.) around the pillar main bars ( Assembled bar is often used.

An example of the work procedure when constructing a building with a reinforced concrete structure using such a reinforced concrete basket for pillars will be explained. First, for the pillar with a length (height) corresponding to the floor height of that floor on the lowest floor. A reinforced cage is built, the reinforced cages for beams are bridged between the cages, then a form is assembled on the outside of the cage and the concrete is placed inside it. Then, when the concrete hardens, a reinforcing bar cage for the upper floor is added to the upper end of the reinforcing bar cage, and the above procedure is repeated for each floor to construct a building.

By the way, in the above-mentioned work, when joining the reinforcing steel cages in the axial direction, generally, a means such as a lap joint or a sleeve joint is used to wrap the main reinforcing bars and bind them with a binding iron wire or the like. Was there.

[Problems to be Solved by the Invention] However, in the joint means as described above, since the main bars are connected one by one, the joining work on site is extremely troublesome and the work efficiency is poor. There was a problem to be solved.

The present invention has been made in view of the above circumstances, and it is possible to accurately perform a joint work of a joint portion of a reinforcing member embedded in a pillar or a beam of a concrete structure in a short time, and improve its workability. An object of the present invention is to provide a joint structure of a mesh-like reinforcing member and a construction method thereof.

[Means for Solving the Problems] Therefore, in the joint structure of the first invention, a plurality of main reinforcements arranged at intervals and a plurality of shear reinforcements arranged in parallel in the axial direction of these main reinforcements at intervals. A net-like reinforcing member assembled from streaks is butted against each other along the axial direction of the main bar, these net-like reinforcing members are joined together by a joint net, and a butt surface is provided at the abutting portion of the net-like reinforcing member. The joint reinforcement to be formed is provided in parallel with the shear reinforcement reinforcement, and the joint mesh reinforcement is provided with a clip mechanism for holding the joint reinforcements that are abutted against each other.

Further, in the construction method according to the second aspect of the invention, there is provided a reticulated reinforcing member assembled from a plurality of main reinforcements arranged at intervals and a plurality of shear reinforcements arranged in parallel at intervals in the axial direction of the main reinforcements. A joint part construction method for joining the main bar in the axial direction, wherein (a) a step of providing a joint bar that forms a butt surface at the butt part of the mesh reinforcing member in parallel with the shear reinforcing bar; A step of butting the abutting portions of the net-like reinforcing member with each other, and (c) a joint net having a clip mechanism is attached to the side surface of the net-like reinforcing member, and the joining net held by the clip mechanism is held and the joint net is held. And a step of locking the streaks to the net-like reinforcing member.

[Operation] According to the present invention, the abutting portions of the net-like reinforcing members are abutted against each other, and the joining streaks provided on one of the net-like reinforcing members are brought into surface contact with the joining streaks of the other net-like reinforcing member, thereby providing a net-like reinforcement. Since members can be joined together, and the net reinforcements can be connected and fixed by a simple work of joining joint nets to these joints and holding the joints with the clip mechanism, The workability and safety can be improved, and the construction period can be shortened.

In addition, if the net-like reinforcing member and the joint net reinforcement are made of a material in which continuous fibers are coated with a resin, the net-like reinforcing member and the like can be reduced in weight and workability at the site can be further improved. ,preferable.

[Example] Hereinafter, a joint portion structure of a reticulated reinforcing member according to the present invention and a construction method thereof will be described in the order of construction with reference to the drawings. In addition, in one embodiment, an example in which the present invention is applied to a case where a joint portion of a cage-like reinforcing member embedded in a pillar of a concrete structure is constructed as the joint portion of the net-like reinforcing member is shown.

(I) Formation of cage-like reinforcing member and joint net reinforcement In the figure, reference numeral 1 is a cage-like reinforcement member for a column, and 2 is a joint net reinforcement for joining the cage-like reinforcement member 1.

The cage reinforcing member 1 includes a plurality of (16 in the embodiment) column main bars 4 which are three-dimensionally arranged at predetermined intervals.
And a plurality of shear reinforcing bars 5 arranged in parallel at intervals in the axial direction of the column main bars 4 to be assembled to a length corresponding to, for example, the height of one layer of the structure.

The pillar main bars 4 are arranged in parallel at equal intervals so as to be located on the sides of the quadrangle, and the shear reinforcement bars 5 extend in the circumferential direction so as to connect adjacent column main bars 4 to each other. An intersection is formed between the main bars 4 and the main bars 4 are integrally fixed.

On the other hand, at the abutting portions at the upper and lower ends of the cage-shaped reinforcing member 1, as shown in FIG. 1 to FIG. 3 and the like, joint lines 6 that form the abutment surface A are provided along the periphery of the cage-shaped reinforcing member 1. The cage-shaped reinforcing member 1 has a frame-shaped abutting surface A formed at the upper end and the lower end thereof, respectively. In addition, this joint muscle 6
As shown in FIG. 2 and the like, the mounting position of is such that, in a state where the upper and lower cage-shaped reinforcing members 1 are butted, the positions at which these joint reinforcements 6 are abutted are on the arrangement pitch P of the shear reinforcement reinforcements 5. Is set to.

On the other hand, among the joint bars 6 formed at the abutting portions of the upper and lower ends of the cage-shaped reinforcing member 1, the joint bars 6 located at the upper end are
Fitting part 7 that fits on the inner peripheral surface of the joint bar 6 located at the lower end
Is protruding. The fitting portion 7 protrudes above the joining bar 6 in a rectangular frame shape along the inner circumference of the joining bar 6, and is fitted tightly to the joining bar 6 at the lower end of the cage reinforcing member 1. There is.

The inner peripheral edge 7a of the upper end portion of the fitting portion 7 and the inner peripheral edge 6a of the joint line 6 into which the fitting portion 7 is fitted are notched in a tapered shape as shown in FIG. When the fitting portion 7 is fitted to the inner circumference of the joining streak 6, care is taken so that these fitting smoothly.

In the illustrated example, a fitting portion 7 is provided on the joining bar 6 at the upper end of the cage-shaped reinforcing member 1, and the fitting section 7 is provided at the lower end of the cage-like reinforcing member 1 arranged on the upper floor. However, the present invention is not limited to such a configuration, and a configuration in which they are arranged in reverse may be adopted. Further, as shown in the drawing, the fitting portion 7 is not limited to the one formed in the shape of a square frame, but may be configured such that the fitting portion made of plastic is fixed to the four corners of the joint streak 6. Any structure may be used as long as it can be fitted to the inner peripheral surface of the joint muscle 6.

Next, the joint net reinforcement 2 for joining the cage reinforcing members 1 to each other will be described. As shown in FIG. 1 and the like, these are arranged on the four peripheral surfaces of the cage reinforcing member 1 and arranged vertically. The cage-shaped reinforcing member 1 to be connected is integrally connected from four surfaces around the cage-shaped reinforcing member 1.
It has a basic configuration in which a clip mechanism 10 for holding the joint muscles 6 abutted against each other is provided on the surface (opposite side to).
In addition, as shown in FIG. 4 and the like, each joint net reinforcement 2 includes a plurality of (5 in the illustrated example) joint main reinforcements 11 arranged in parallel along the column main reinforcements 4 and the longitudinal direction of these joint main reinforcements 11. Along with the shear reinforcing bars 5 and arranged in parallel at the same pitch, and has a structure formed in a lattice shape by the connecting bars 12 connecting the joint main bars 11.

The clip mechanism 10 is composed of a pair of claw members 15 which are arranged side by side in the vertical direction at an intersection with the connecting bar 12 located at the center of the joint main bar 11. The entire claw member 15 is made of plastic and formed into a hook shape having a hook 15a at its tip, and its base end is fixed to the side surface of the joint main bar 11. Further, the tip end surface of the claw member 15 is formed in a curved shape curved inward, so that the claw member 15 can be easily inserted into the joint muscle 6.

The attachment interval b of the claw members 15 is set to be equal to the thickness when the two connecting bars 6 are overlapped, so that the connecting bars 6 can be firmly held.

Here, as shown in FIG. 7 and FIG. 8, the main reinforcements 4 and 11, the shear reinforcement reinforcements 5, the joint reinforcements 6, the fitting portions 7 and the like which compose the cage-shaped reinforcing member 1 and the joint net reinforcement 2, respectively, are as shown in FIG. 7 and FIG. Resin material
Fiber bundle T composed of a plurality of continuous fibers 21 bundled at 20
The material is made of solidified material.

Further, the cage-shaped reinforcing member 1 will be described in detail. In this cage-shaped reinforcing member 1, a fiber bundle T composed of a plurality of aligned continuous fibers 21 is three-dimensionally arranged to form the column main bar 4. Each of the fibers 21 of the fiber bundle T is bound by the resin material 20 by constructing and forming an intersecting portion at the shear reinforcing bar portion as shown in FIG.

The intersection of the fiber bundles T (the intersection of the column main reinforcement 4 and the shear reinforcement 5) includes a fiber group extending in one direction,
As shown in FIG. 8, the fiber group extending in the direction orthogonal to this has a cross-sectional shape in which three or more layers are alternately laminated.

Since the basic configuration of these is the same for the joint net reinforcement 2, the description thereof will be omitted.

As the continuous fibers 21 which mainly form the cage-like reinforcing member 1 and the joint rebar 2, glass fibers and carbon fibers, which are lightweight and have high strength, are suitable, but if necessary, other fibers, for example, synthetic resin fibers. , Ceramic fibers, metal fibers and the like may be used. Also, these fibers may be used in an appropriate combination.

As the resin material 20 for binding the continuous fibers 21 of the fiber bundle T, for example, a vinyl ester resin having good adhesiveness to the continuous fibers 21 and itself having sufficient strength is preferably used. Another resin material may be used in accordance with the type of the continuous fiber 21. Examples of other resin materials include unsaturated polyester resins, epoxy resins, and phenol resins.

The ratio of the resin material 20 to the continuous fiber 21 is appropriately determined in consideration of the type and strength of the continuous fiber 21, and the usage form of the reinforcing member 1 and the like. For example, the continuous fiber 21 is a glass fiber. When the resin material 20 is a vinyl ester resin, the continuous fiber 21 is about 30 to 70% by volume, and when the continuous fiber 21 is, for example, carbon fiber, 20
It is desirable to consider it to be about 60%. When the proportion of the continuous fibers 21 is less than the above, the strength of the reinforcing member 1 is remarkably reduced. On the other hand, when the proportion of the continuous fibers 21 is increased, a reinforcing member having high strength can be obtained, but the proportion is too high. Then, a relatively expensive material such as carbon fiber is not preferable in terms of economical efficiency.

In order to form the cage-shaped reinforcing member 1, the joint net reinforcement 2 and the like as described above, for example, in the case of the cage-shaped reinforcing member 1,
A continuous fiber 21 impregnated with a resin (for example, a room temperature curable fluid resin) is hooked on pins or the like provided at positions corresponding to the upper and lower ends of the column main bar in a so-called one-stroke writing manner to form a shear reinforcing bar. The continuous fiber 21 impregnated with the resin is wound around the corresponding position.

And, at these intersections, the fiber groups must be alternately arranged so that at least three layers overlap each other. At this time, continuous fiber 21
Needs to be tensioned enough to maintain linearity.

Here, the supply of the continuous fibers can of course be performed manually, but a method is adopted in which the passage order is automatically executed by mechanical means that operates based on a preset program.

In addition, the distance between the pillar main bars 4 constituting the cage-shaped reinforcing member 1 or the distance between the shear reinforcing bars 5 and the size of the joint mesh bar 2 depend on the size of the pillar to be constructed and the required strength. Further, the continuous fiber 21 includes a twisted string and a braid here.

The manufacturing method of the joint net reinforcement 2 and the like is performed in the same manner as the cage-shaped reinforcing member 1, but the claw member 15 constituting the clip mechanism 10 is separately formed in advance by plastics, and the joint net reinforcement 2 is formed. At the time of pressing, the base end of the claw member 15 may be welded to the side surface of the joint main bar 11 or may be adhered by a high strength adhesive or the like.

(Ii) Installation and fixation of the cage reinforcing member As shown in FIG. 1, the cage reinforcing member 1 assembled by the column main bars 4 and the shear reinforcing bars 5 is erected in a standing state at a predetermined construction position. At this time, the cage-shaped reinforcing member 1 is an extremely light weight because the continuous fiber 21 is solidified by the resin material 20, and it is easy to handle during transportation. Therefore, the cage-shaped reinforcing member 1 is manually operated without using a crane or the like. It can be installed in.

(Iii) Connection of cage-shaped reinforcing members Next, as shown in FIG. 2, the lower end of the cage-shaped reinforcing member 1 for the upper floor is abutted against the upper end of the cage-shaped reinforcing member 1 constructed as described above, The fitting portion 7 is fitted to the inner peripheral surface of the joint bar 6 at the lower end of the reinforcing member 1. At this time, since tapered notches are formed in the inner peripheral edge 6a of the joint bar 6 and the outer peripheral edge 7a of the fitting part 7, the fitting part 7 can be smoothly fitted to the inner peripheral surface of the joint bar 6. Can be combined.

(Iv) Setting of the joint net reinforcement 2 To set the joint net reinforcement 2, the joint net reinforcement 2 is put around the cage-shaped reinforcing member 1 and the claw member 15 constituting the clip mechanism 10 is placed at the position of the joint reinforcement 6. Together, the joint net reinforcement 2 is pushed toward the cage-shaped reinforcing member 1. By this operation, the claw member 15
The tip end of elastically deforms outward to increase the resistance against the pushing operation, but when the joint net muscle 2 is further pushed against this resistance, the hook 15a at the tip of the claw member 15 is pushed.
Engage the joint muscles 6, and the upper and lower joint muscles 6 are held.

In order to firmly hold the connection between the upper and lower cage-shaped reinforcing members 1, the number of clip mechanisms 10 may be further increased in the joint net reinforcement 2, and in some cases, the joint net reinforcement 2 and the basket-like reinforcement member 1 may be provided. It is only necessary to bind and fix the wires with a binding iron wire or a binding fastener clip.

After joining the cage-like reinforcing members 1 as described above, the molds are assembled on the outside of these, and concrete is then poured into these molds to integrally form the pillars. You can In addition, in the above, by reducing the size of the mesh between the column main reinforcement and the shear reinforcement 5, it is also possible to omit the formwork and place the concrete of the column inside the cage reinforcement. is there. Also,
As shown in FIG. 6, if the outer side surface of the joint main bar 11 is projected outward and the projecting portion 30 having the concrete coating thickness is formed on the back surface side of the clip mechanism 10, the projecting portion 30 can increase the concrete coating thickness. It is preferable because it has a merit that it functions as a spacer for holding and facilitates installation of the formwork and securing of the concrete coating.

As described above, the joint portion of the cage reinforcement member 1 for a column is constructed, but in this construction method, the joining can be performed extremely easily and accurately. That is, since each member has a lightweight structure formed by binding the continuous fibers 21 with the resin material 20, the work of setting the cage-shaped reinforcing member 1 for pillars and the like can be performed without using a crane or the like. This can be easily performed manually, and the upper and lower cage-shaped reinforcing members 1 can be aligned by fitting the fitting portions 7 into the joint lines 6 of the abutting portions of the cage-shaped reinforcing member 1. Is. Moreover, the joining work is a simple work in which the fitting portion 7 is fitted to the joining rib 6 of the abutting portion of the cage-shaped reinforcing member 1 and the joining mechanism 6 is held by the clip mechanism 10 of the joint net reinforcement 2. Since all of these are unitized by factory production, workability and transportability at the site are good, and joining work can be easily performed.

Furthermore, since the cage-shaped reinforcing members 1 are firmly connected to each other by the clip mechanism 10 of the joint net reinforcement 2, it is possible to sufficiently cope with tension and compression applied during construction,
Further, structurally, since the joint net reinforcement 2 can be applied as a lap joint, its strength can be sufficiently secured.

In addition, the above-mentioned members (cage-shaped reinforcing member 1, joint net reinforcement 2)
Has a structure in which the continuous fibers 21 are covered with the resin material 20, so that the fiber, which is the main strength member, has excellent corrosion resistance and is extremely advantageous as a structural material. Further, since the surface is formed of a resin as described above, there is an advantage that rough surface processing for improving adhesion to concrete can be easily performed.

In addition, although the cage-shaped reinforcing member 1 has a size corresponding to the height of one level of the building in the above-described embodiment, the cage-shaped reinforcing member 1 has a size of two levels or three levels. It may be assembled into a car-shaped reinforcing member 1
When constructing a building, the upper and lower cage-shaped reinforcing members 1 are connected to each other by the joint mesh bars 2, and the cage-shaped reinforcing member 1 is kept in the connected state.
May be installed upright.

9 and 10 show another example of the clip mechanism 10 used in the joint portion construction method of the present invention. In this example, instead of locking the joint muscle 6, the column main bar 4 is used. Is configured to be locked by the hook 15a, and the joint bar 6 is held by the upper and lower claw members 15 that are locked to the column main bar 4. That is, the joint bars 6 are provided above and below the main joint bar 11.
Two sets of claw members 15 for holding the claw are projectingly provided, and hooks 15a that engage with the column main bars 4 are formed at the tips of these claw members 15.

Even in such a case, the claw member 15 is attached to the pillar main bar 4.
Can be locked and the joint muscle 6 can be held in a pinched state.

In addition, in each of the above-described embodiments, the cage reinforcing member 1 and the joint net reinforcement 2 are formed by being hardened with a resin material, but in the present invention, these materials are not limited to those of the embodiments. For example, each constituent element (column main bar 4, shear reinforcing bar 5, etc.) may be composed of a reinforcing bar or the like.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above. For example, the cage-like reinforcing member may be applied to a cage-like reinforcing member for beams other than the ones shown in the above-mentioned embodiment, and as shown in FIG. It goes without saying that the present invention can be applied to the case where the flat net-like reinforcing member 40 is joined instead of the cage-like reinforcing member provided.

"Effects of the Invention" As described above, in the joint portion structure of the cage-shaped reinforcing member according to the first aspect of the invention, a plurality of main bars arranged at intervals and a plurality of main bars arranged in parallel at intervals in the axial direction of the main bars. A net-like reinforcing member assembled from a plurality of shear reinforcing bars is butted against each other along its axial direction, and these net-like reinforcing members are joined together by a joint net bar, and a butt surface is provided at the abutting portion of the net-like reinforcing member. Since the joint reinforcement forming the joint reinforcement is provided in parallel with the shear reinforcement, and the joint mesh reinforcement is provided with a clip mechanism for holding the joint reinforcements that are butted against each other, the mesh reinforcement is easily and axially formed. There is an effect that the welding can be performed with high precision and that the construction work on the site can be easily performed.

Further, in the construction method according to the second aspect of the invention, there is provided a reticulated reinforcing member assembled from a plurality of main reinforcements arranged at intervals and a plurality of shear reinforcements arranged in parallel at intervals in the axial direction of the main reinforcements. A method of constructing a joint portion for joining in the axial direction thereof, comprising: (a) providing joint ribs forming a butt face at the abutting portion of the braided reinforcing member in parallel with the shear reinforcement, and (b) the braided reinforcement A step of butting the abutting parts of the members with each other, and (c) a joint reed having a clip mechanism is attached to the side surface of the reticulated reinforcing member, and the joining reeds abutted by the clip mechanism are sandwiched and the reticulated reinforcing member is formed. Since it has the step of locking, the net-like reinforcing members can be connected to each other in the axial direction by a simple construction work, and the workability and safety at the site can be improved. Come, it is possible to shorten the construction period.

In addition, the reticulated reinforcing member is each component that forms a joint net reinforcement (column main reinforcement, shear reinforcement, joint main reinforcement, joint reinforcement, etc.)
Is preferable because it is possible to reduce the weight of each member and further improve the workability in the field by adopting a structure in which the continuous fiber is coated with a resin.

Further, the joint rebar is formed from a plurality of joint main bars arranged in parallel along the main bar, and connecting bars arranged in parallel along the length direction of these joint main bars and connecting the joint main bars, and,
If the claw member that constitutes the clip mechanism is arranged at the intersection of the joint main bar and the connecting bar, the applicability for unitization can be improved and the joint mesh bar can be applied as a lap joint, There is an effect that the strength can be sufficiently secured.

[Brief description of drawings]

The drawings show an embodiment of the present invention, FIG. 1 is an exploded perspective view showing a cage-like reinforcing member and a joint net, FIG. 2 is a side view showing a state in which the cage-like reinforcing member is vertically joined, and FIG. FIG. 4 is a side view showing a state in which the joint braces of the figure are attached, FIG. 4 is a perspective view of the joint braces, FIG. 5 is a sectional view showing a state where the joint braces are held by a clip mechanism, and FIG. 6 is a joint braces. FIG. 7 is a cross-sectional view of a fiber bundle, FIG. 7 is a cross-sectional view of an intersection of fiber bundles, and FIGS. 9 and 10 are other examples of the clip mechanism. , Fig. 9 is a longitudinal sectional view, Fig. 10
The figure is a side sectional view, and FIG. 11 is a plan view showing an example applied to a flat-mesh reinforcing member. 1 ... basket-like reinforcing member (net-like reinforcing member), 2 ... joint mesh bar, 4 ... column main bar, 5 ... shear reinforcing bar, 6 ... joint bar,
7: Fitting part, 10: Clip mechanism, 11: Joint main bar,
12 …… Connecting bar, 15 …… Claw member, 15a …… Hook, 20 ……
Resin material, 21 ... Continuous fiber, T ... Fiber bundle, A ... Butt face.

Front page continued (72) Inventor Tadashi Fujisaki 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Seiho Kitagawa 2-16-1 Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. Within

Claims (4)

(57) [Claims] 1. A net-like reinforcing member assembled from a plurality of main reinforcements arranged at intervals and a plurality of shear reinforcements arranged in parallel at intervals in the axial direction of the main reinforcements along an axial direction of the main reinforcement. Are abutted against each other, and these net-like reinforcing members are joined to each other by a net-like reinforcing member, and at the abutting portion of the above-mentioned net-like reinforcing member, a connecting bar forming a butting surface is provided in parallel with the shear reinforcing bar, and the joint is formed. A structure for a joint portion of a net-like reinforcing member, wherein a clip mechanism for sandwiching the connecting muscles that are butted against each other is provided on the net-like reinforcement. 2. The joint net reinforcement is mainly composed of a plurality of joint main reinforcements arranged in parallel along main reinforcements, and connecting reinforcements arranged in parallel along the longitudinal direction of the joint main reinforcements to connect the main joint reinforcements. The joint portion structure of the reticulated reinforcing member according to claim 1, characterized in that a claw member constituting a clip mechanism is provided at an intersection of the joint main bar and the connecting bar. 3. The reticulated member according to claim 1, wherein the reticulated reinforcing member and the joint reticulated member are each formed by solidifying continuous fibers with a resin material. Joint structure of reinforcing member. 4. A braided reinforcing member assembled from a plurality of main reinforcements arranged at intervals and a plurality of shear reinforcements arranged in parallel at intervals in the axial direction of the main reinforcements. A method of constructing a joint portion for joining in a direction, comprising: (a) a step of providing a joint streak forming a butt face in the butt portion of the mesh-like reinforcing member in parallel with the shear reinforcing bar; The step of butting the abutting portions against each other, and (c) the joint reed having a clip mechanism is attached to the side surface of the reticulated reinforcing member, and the joint reciprocating members that are butted by the clip mechanism are sandwiched and the reticulated joint reticulated A method of constructing a joint portion of a net-like reinforcing member, the method including: a step of engaging with a member.