JPH0437903B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field and Object of the Invention) The present invention relates to a method for assembling a wall reinforcing bar network that connects and fixes a wall reinforcing bar network to a column structure to be installed in a wall space of a medium-to-high-rise building. .

BACKGROUND ART As wall reinforcing bars embedded in earthquake-resistant walls of medium-to-high-rise buildings such as apartment complexes, a reinforcing bar network in which vertical and horizontal bars are welded in a lattice pattern is increasingly being used.

The side edges of this wall reinforcing bar network adjacent to the columns must be inserted and anchored into the interior surrounded by the hoop reinforcement of the column structure consisting of reinforcing bars or steel frames and reinforcing bars,
The positioning of wall reinforcing bars must be accurate and prevent them from shifting or falling off.

However, it is difficult to insert the ends of the horizontal reinforcements of the wall reinforcement network until they reach the reinforcing structure of the column, so after first inserting the ends of the horizontal reinforcements in close proximity to the column structure, it is necessary to insert a large number of insert bars of a certain length. The reinforcing bars are positioned and supported so that one end fits within the reinforcing bar structure of the column and the other end overlaps the side edge of the wall reinforcing bar network, and the insert bars, the column structure, and the wall reinforcing bars are tied together to form the wall reinforcing bar network. It is often established on the pillar.

However, with this construction method, a large number of reinforcing bars must be individually aligned and supported while being attached to the side edges of the wall reinforcing bar network and the column structure, making the work complicated and taking a long time. Become.

In addition, since each of the above-mentioned insert bars is individually tied to the horizontal bars of the reinforcing bar network and the hoop bars of the columns, some of the insert bars may shift or come off from their designated positions due to concrete pouring or other external forces. This may result in an incomplete structure.

The present invention aims to provide a new construction method that eliminates the drawbacks of the conventional construction methods described above.

(Structure of the Invention) The structure of the construction method according to the present invention is as described in the claims, and in short, the main feature is that a plurality of joint reinforcing bars are used, which corresponds to a large number of conventional insert bars. A fixing reinforcing bar structure is adopted that connects the wall bars and columns by arranging the books vertically and overlapping each other at the required intervals, and welding the extended parts and orthogonal through reinforcing bars to the integrated wall bars and columns. By inserting it into the reinforcing bar enclosure of the column structure, it has an effect equal to or greater than that of the conventional method of accurately positioning a large number of reinforcing bars one by one and carefully fixing them to prevent them from shifting and being unable to be removed. It's where I tried to fit it.

(Example and Supplementary Explanation) An example of the present construction method will be described below with reference to drawings, and modified examples will be supplemented.

First, to give an overview, the structures A and A' made of steel frames and reinforcing bars in Fig. 1, the concrete-cast floor plate B, and the wall space R side with joint reinforcements protruding from the top surface in the shape of a wedge. Then, as shown in FIG. 2, the reinforcing bar structure C for anchoring wall reinforcement used in this method is inserted into the reinforcing bar enclosure of the column, tied to the column structure, and fixed. Then, as shown in Fig. 3, the lower end of the vertical bar of the wall reinforcing bar network D is tied to the comb-like joint bar protruding from the subfloor board, and one side edge of the wall reinforcing bar network D is fixed to the column. It is coupled to an extension of a joint reinforcing member protruding from a column of a certain wall reinforcing reinforcing structure C. Next, as shown in Figure 4, the wall reinforcement network is
Overlap D', insert and bundle the wall reinforcement reinforcement structure C' to the column structure A' on the opposite side in the same way as before, and overlap one side edge of the wall reinforcement network D'' on the same D' and tie it. Then, the other side edge is tied and fixed with the reinforcing bar structure C' for fixing the wall bars.After that, the reinforcing bars are stretched parallel to the plane of the stretched reinforcing bar net at the required interval, that is, 10 cm in this example. Install the wall reinforcing bars one after another at intervals as before, and
It will have a double reinforcement structure as shown in the plan view of the figure.

In this example, the column center spacing is 8000 mm, the height of one floor is 2700 mm, and the insert or joint reinforcement members protruding from floorboard B are spaced at intervals of 150 mm to 200 mm, but the three-dimensional wall reinforcement used in this example The anchoring reinforcing bar structure C and its installation method will be described in more detail as follows.

The reinforcing bar structure C for anchoring wall reinforcements is as shown in the sketch of Fig. 6, and includes a pair of extension parts 1b, 1b extending in parallel at a distance of 100 mm from a tip part 1a bent into a U-shape. ′ joint reinforcing member 1,
A plurality of extension parts 1b, 1... are arranged in parallel in a superimposed manner vertically at intervals of 150 mm or 200 mm so that each extension part 1b, 1b' extends horizontally.
220 from the bent tip 1a on b' to the opposite end.
Upper and lower extensions 1b, 1b at distances of mm
. . , 1b', 1b', . . . and 1b', 1b', .

The reinforcing bar structures C and C' for anchoring wall bars in the above embodiments have a large number of rectilinear bars that are to become the plurality of joint bar members 1.
Two rectangular bars arranged in parallel at 150 mm or 200 mm intervals and orthogonal to these are welded at a distance of about 450 mm to form an integrated lattice-like structure, and then the centers of the many rectangular bars are squared in a U-shape. It is folded and formed into a three-dimensional structure by arranging auxiliary striations a.

As shown in FIG. 2 and FIGS. 7 and 8, this wall reinforcement reinforcement structure C is constructed from the wall space R side toward the center of the column structure A. The tip part 1 of the joint reinforcing bar member 1, 1...
a, 1a... reach sufficiently inside the hoop reinforcement 5 surrounding the steel frame 3 and main rectilinear reinforcement 4 of the column structure A, and the through reinforcement members 2 that constitute the wall reinforcement reinforcement structure C are connected to the column structure A. is inserted until it comes into contact with the hoop muscle 5, and both are tied together at a plurality of locations at appropriate intervals. This results in a state similar to that in which a large number of conventional reinforcing bars are attached at the same time with their mutual positions and positions relative to the pillars accurately regulated. Each joint reinforcing bar member 1, 1, . . . welded to the through reinforcing bar member 2, 2' will not be displaced or separated by the subsequent injection of concrete.

Next, as shown in Figures 3 and 7, the reinforcing bar diameter is 10
Grid spacing 150mm with vertical bars 6 and horizontal bars 7 of mm length welded together
Alternatively, a wall reinforcing bar network D of approximately 200 mm, height 2500 mm, and width 3000 mm is applied by crane operation or other means, and a wall reinforcing bar structure C is constructed by attaching the vicinity of the side edge to the column structure A. Each joint reinforcing member 1
The vertical reinforcements 6 and horizontal reinforcements 7 of the wall reinforcing bar network D, the comb-edge joint reinforcement protruding from the subfloor surface B, and the extension part 1b of the joint reinforcing bar member 1 are connected at each necessary location. Join. The connection between the wall reinforcing bar network D and the anchoring reinforcing bar structure C is approximately 400 mm outside the column reinforcing bar structure.
This is done by tying together appropriate points in the overlapping portion of the protruding extension portion 1b of the joint reinforcing bar member 1 and the two vertical bars 6 and the horizontal bars 7 at the side edge portions of the wall reinforcing bar network D.

Next, as shown in Fig. 4, the wall reinforcing bar network D' is installed in the usual manner, and then the wall reinforcing bar network is attached to the attached wall reinforcing bar structure C' or the existing structure C'.
Install D″ as before.

This completes the installation of one side of the double rebar net,
Next, install the wall reinforcing bar network on the other side parallel to this using the same process as before.Although the above explanation was given for a column structure made of steel frames and reinforcing bars, the column structure can also be one without steel frames. good.

The above example is an example in which the floor reinforcing bars for the top floor or upper floor are assembled later and the wall reinforcing bar network is double reinforced, but when the upper beams etc. are assembled first or the wall reinforcing bars are single reinforced. It goes without saying that this method can also be applied to

In other words, when the wall reinforcing bar network is a single layer, a fixing structure is constructed by arranging a plurality of joint reinforcing bars whose tips are bent into an L-shape or the like in parallel, and welding through the reinforcing bar members and auxiliary bars parallel to the reinforcing bars. However, it is also possible to use a structure similar to that shown in the above embodiment. In the latter case, insert the side edges of the wall reinforcing bar network between a pair of parallel extensions of each joint reinforcing bar member of the reinforcing bar structure for wall reinforcement anchorage, adjust the mutual position of both with spacers, and fix. Bye.

In addition, an example of implementing this method on a structure preassembled with lattice beams, including the process up to concrete pouring, is as follows.

That is, in this case, as shown in Figure 9,
A wall reinforcing bar network D is stretched in single or double layers, and the comb-like protruding portions at the upper ends of the vertical bars are connected to angle members 8 and flat plate members 9.
and a lattice beam made up of lattice reinforcements 10.

In this state, the floor plate lattice reinforcement 11 or upper end reinforcement of the upper floor is arranged, and the wall reinforcement reinforcement structure C shown in FIG. When inserted into the beam from above the lattice beam with the lattice beam facing upward, the through reinforcing bar member 2 abuts against the floor plate lattice reinforcing bar 11 and is fixed in the fixed position. In this case, the structure is the same as that of attaching a large number of reinforcing bars at once, and unlike the case where a single reinforcing bar is used, there is no fear that a part of the reinforcing bars may become misaligned or detached. After that, when the concrete for columns, floorboards, and walls are placed at the same time, the extensions 1b of the joint reinforcing bars 1 constituting the reinforcing steel structure C are exposed in parallel and erect on the floor surface with the tips 1a facing upward. Therefore, the vertical bars of the wall reinforcing bar network on the upper floor can be bound and joined to this, and this construction method can be applied to the upper floor as before.

The specific configuration of the wall reinforcement anchoring structure used in these construction methods is not limited to the above-mentioned embodiments. A joint reinforcing bar member with a large diameter and one with a small diameter may be used in combination, and the shape and formation method of the bent end portion thereof may be freely determined, and these may be provided at both ends of the extension portion. If only one end of the extension has a bent tip, the tip may be oriented vertically in the opposite direction. It is sufficient that the extension part extends substantially in the horizontal direction, and a portion thereof may be curved at an angle. The spacing between each joint reinforcing bar member can also be an integral multiple of the spacing between the transverse bars of the wall reinforcing bar network.

As mentioned above, the feature of this method is that when attaching and fixing a wall reinforcing bar network to a single column, unlike conventional construction methods, an integral structure of the wall reinforcing bar network is used and this is attached to the column. By this method, a large number of joint reinforcing bar members are fixed in position at once, and the side edges of the wall reinforcing bar network are attached to their extensions.

Depending on the situation, it may be determined whether this process is performed simultaneously or sequentially at various locations, or at what stage wall reinforcing bars and other structural members that are not involved in this process are to be installed. In addition, when double reinforcing a normal wall reinforcing bar network, contrary to the conventional order, first attach the wall reinforcing bar structure to the column structure, and then attach the wall reinforcing bar network to this. Become.

(Effects) As described above, this construction method eliminates the complexity and delay of on-site construction caused by installing individual reinforcing bars between the wall reinforcing bars and the column structure in order to fix them to the column structure. . That is, by attaching a single reinforcing bar structure for anchoring wall bars to a column, construction work can be completed more quickly than if a large number of reinforcing bars were inserted all at once.

In addition, since the above-mentioned wall reinforcement reinforcement structure is a one-piece welded body according to predetermined dimensional specifications, the mutual positioning of the joint reinforcement members is extremely accurate, and the positioning with the columns, which is difficult to install, can be avoided. No alignment required. In particular, when installing double wall reinforcing bars, the spacing between the extensions of joint reinforcing bars is accurate, so
It itself acts as a spacer to maintain the spacing of the wall reinforcement network.

Moreover, since the joint reinforcing bar members and the through reinforcing bar members of the reinforcing bar structure for wall reinforcement are welded together,
Phenomena such as displacement or detachment of some joint reinforcing bars do not occur due to concrete injection or other external forces.

Furthermore, according to this construction method, even when installing several or more wall reinforcing bars on one wall with wide spacing between columns, it is sufficient to prepare reinforcing bars with at most three different dimensional specifications, making it easy to manage them. This has the advantage of making it easier to do the following.

[Brief explanation of drawings]

Figures 1 to 4 are front views of building structures showing the general sequence of an example of the construction method according to the present invention, Figure 5 is a plan view corresponding to Figure 4, and Figure 6 is the reinforcing steel structure used in this construction method. A sketch of an example of the body, Figures 7 and 8 are shown in Figure 3.
A detailed front view and a plan view of a part of the figure, and FIG. 9 are explanatory diagrams of an example of this construction method when lattice beams are pre-assembled. A, A'...Column structure, B...Subfloor board, R...Wall space, C...Reinforced structure for anchoring wall reinforcement, D, D', D''...
Wall reinforcing bar network, 3... Column steel frame, 4... Column main reinforcement, 5... Hoop bar, 1... Joint reinforcing bar member, 1a... Same tip, 1b...
Extension part, 2...Through reinforcing bar member, 6...Wall reinforcing bar network vertical reinforcement, 7...Same horizontal reinforcement, 8...Angle material, 9...Flat plate material,
10... Lattice bar, 11... Floor lattice bar.

Claims (1)

[Claims] 1. Welding together multiple joint reinforcing bars in which extensions extending laterally from the bent tips are stacked vertically at intervals and through reinforcing bars perpendicular to the extensions arranged above and below these members. Insert and fix the integrated reinforcing bar structure for wall reinforcement so that the tip of the joint reinforcing member fits inside the reinforcing bar of the column or the reinforcing bar enclosure on the wall space side of the steel frame/rebar structure, and a wall reinforcing bar assembly characterized in that the extension part of the joint reinforcing bar member constituting the fixing reinforcing bar structure and the side edge part of the wall reinforcing bar network built in the wall space are overlapped and fixed. Construction method.