JPS58213935A - Construction of iron skeletal reinforced concrete structure having large diameter iron wire used to beam thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention uses cast-in-place SRC columns for columns, cast-in-place TTC structures for beams, and in particular, uses spiral large-diameter reinforcing bars as the main reinforcement of the beams, and has stars around them. I was inspired by the method of constructing a steel-framed reinforced concrete structure using LTC construction, which has built-in beams made of prefabricated reinforcing bars.

Generally, in this type of steel-framed concrete structure, the length twice the floor height is fixed, as shown in Figure 1.
In addition, short through bars (cicada size? 4) are installed in advance at the column and beam reinforcement points.
．． A reinforcing bar phase is used. ) Fix the column a and make the column steel frame into a square shape. Le...
Liang-Kai (This is an assembled reinforcing bar that uses a large-diameter screw-on reinforcing bar as the main reinforcing bar of the beam.) C is suspended between the column steel frames using a tow truck, and both ends of the main beam reinforcing bar d and 7'+iJ Since the frame was constructed by repeating the process of joining the mats and the ends of the striations a, there were the following drawbacks.

In other words, in the case of using the above-mentioned 4'iit construction method, each column steel frame is independent of each other, and the base end is connected to the column steel frame on the lower floor at one point, resulting in a lack of stability. , 1st
As shown in the figure, it is necessary to connect the upper ends of the column steel frames vertically and horizontally with the temporary beams θ, f'''C for erection. It was removed after it was erected.

Moreover, when the frame material 0 is suspended, the temporary beam f or the suspension wire becomes an obstacle, and each time the beam material C is suspended, the temporary beam f
It is necessary to attach and detach the

In particular, since the column steel frame and the beam material C are hung separately,
There are many work steps, and since both ends of the main reinforcing bar d and the through bar a are joined, there are many joints that are loose and the workability is poor. In addition, the stability of the column steel frame is m (difficult).
It is not possible to join the +1 steel frame on the upper layer, and as a result, work at height is essential for joining the ill L-rebar A and the main reinforcing bar, which is accompanied by great danger.

In addition, the li determination of the tracing line a at the point part of the column/beam is, for example, as seen in Japanese Utility Model Application Publication No. 54-119206, where two pieces are screwed together in the spiral shape of the running line a. →tsu) g
, G' is the surface of each 7 rung part of the column steel frame (1111
11 itu)) (see Figure S2, j!jf). For this reason, when a tensile stress to the left in Figure 2 occurs in the tracing force JJ a, the left side 1)g does not have a fixed effect, and conversely, for the tensile stress to the right, The fixing action by the right side nut g' will not be fixed, and the displacement of the bolt will be caused by the through-bar IL.
is 7 lunge t91 (taf as a stiff 7ner between) L
However, the result was that the elongation of the steel at the nodal point and the slippage against the concrete made it impossible to expect the toughness of the LJ and m point portions.

Of course, as disclosed in the above publication, li! 11 The constant deviation is ili+ with respect to concrete.
L/rear a (7) The twisting can be avoided by avoiding it, but in this case, it is not possible to rotate the tracer a, and the phase of the thread Q of the through-rebar a and the main reinforcing bar cannot be aligned. Joiner [+
゛ will naturally become ((I().

In addition, for reinforced concrete structures in which both the plates and beams are I (C construction), as shown in Fig. 3, two vertical reinforcing bars hL, I+2 with a length of 2 spans are used. The beam material C that extends is attached to the assembly reinforcing bars h for each column at both ends.
l.

A construction method using a pre-assembly constructed by protruding each span from h2 has been known for a long time. 1 in the figure is a rectangular tube-shaped m that restrains the concrete at the point of the column/beam. It is a plate.The main reinforcing bar d of the beam C is for ■i!L!lli
Hon 4 Honne 1! It's just that I'm playing L
It is not fixed to the IT assembly reinforcing bars hl and h2.

However, when using this construction method, the assembly reinforcing bars for columns hl
, b2 is easily deformed, and the verticality has to be corrected in 1111 cases, and Ka + vertical reinforcing bar hl + b? It is necessary to join the main reinforcing bars d of the beams of the pre-assembled bodies that are horizontally adjacent to each other by @S degree that they are in contact with each other. In addition, since the main reinforcing bars d are not fixed at the points of the columns and beams, there is the same drawback as in the case of FIG. 2.

The present invention aims to solve these conventional drawbacks, and has two adjacent pillar steel frames each having a length corresponding to the number of rice grains hh N4, with a spiral shape extending over the entire length. .

Is the large-diameter rebar material made of screws the main ingredient of chestnut? 7i, with a stirrup around the periphery and a length of 2 spans, a plurality of 111 layers of beam material were used, with the main reinforcing bars being 6jj )・4ζi at the point of the beam, passing through a pair of opposing fins of the column steel frame or a pair of steel plates fixed thereto, and screwing into the spiral shape of the main reinforcing bar -4 - The first pair of fixing metal fittings with screw holes are used to tighten and fix both the front and back sides of the 7 rung section or C1f board, and both ends protrude from each column steel frame by ÷span. Using the constructed pre-assembled body, the column steel frames of the vertically adjacent pre-assembled bodies are connected to each other at the center of the floor height, and the main reinforcing bars of the beam materials of the horizontally adjacent pre-assembled bodies are connected to each other at the center of the floor height. They are characterized by being joined to each other at the center of the span.

Hereinafter, embodiments of the present invention will be described based on the drawings from FIG. 4 onwards.

FIG. 4 shows the state in the middle of construction of 3 steel columns and beams 4 in a steel-framed reinforced concrete structure in which the block 1 is S+tC construction and the beam 2 is +tC construction. A is the pre-assembled body of the pillar iron 3 and the beam material 4. 5 is made of precast concrete, but it may also be made of on-site concrete. ) 6 is a floor slab made of concrete from the site tJ,
7 is Ojo ff/+, 8 is a hoop reinforcement using spiral reinforcement, and 9 is (The temporary beam 110 for the blade is a joint plate of the column steel frame 3. In addition, in the same figure, the FJ of the column main reinforcement 7: , the part where the reinforcement work of the hoop reinforcements 8 and 8 have been completed, and the part where these works have not yet been done.

The above-mentioned pre-assembly A consists of two adjacent column steel frames 3 that set the length of the observation floor waste, and a U-shaped material 4 for the inset floor that sets the length of the two spans. It is assembled.

The frame member 4 has 44. H
Using a spiral strut made by processing a spiral shape, a spiral striation is placed around the struts, and a stern lubricant 12 is attached to two claws, and the stern lubricant 12 is tied into two claws, and then tied to the door. The main reinforcing bars 11 are attached to the steel frames 3 at the lid and beam points of the two column steel frames 3, and are fixed to both column steel frames 3, and both ends are connected to each column steel frame 13. Both pillars are erected on steel frames 3" with 3" spans protruding from each other.

As the column steel frame 3, 4811 llJl surface shapes can be used, but in the example of the opening, 1] type steel is used. - Closing - C, D'lj The main reinforcing bars 11 and U' steel frame 3 are fixed by attaching them to a pair of opposing 7-run 9 parts 3a of each column steel frame 3, as shown in Figures 5 and 6. Insert the main reinforcing bar 11 into the hole made by A! T5 is made by tightening both sides of each 7-run 9 section 3a with a plurality of pairs of fixed nuts 13, such as nuts, which are screwed into the 11 screw molds. In addition, the main steel 'UJr' appearing on the pillar steel frame 3
11th month jilt is the top i! The main reinforcing bar 11 is passed through the 7 rung hill (7 rung hill) 3a as shown in c', but is not limited to the one shown in Fig. 3. You can follow it.

In addition, for assembling the pre-assembled structure, draw a full-scale drawing on the top of the fixing base (made of steel or wood may be used) scattered at the site, and install two steel frames and three steel frames according to this full-sized drawing. Place it and fix it 1.
≧While rotating the object appropriately, insert the main reinforcing bar 11 into the 7-run 9 part 3a of the column iron η3 or the steel plate welded to it. This is done by winding the star shaft 12 and pulling the island 1 sl [-J tann.

As shown in Fig. 6, when the pre-assembled bodies A are arranged horizontally in parallel, the base end of each column steel frame 3 is connected to the column steel frame on the lower floor (first floor) at the center of the cross section. In the case of , it is connected to the column steel frame (3) erected from the underground beam via the joint brake and the bolt.

In this case, first) 1 body A has two pillars connected and integrated by multiple columns 4, and the iron number 3 is attached to the top of the two pillars steel frame 3, so it has good stability. It will be built so that it can stand on its own without using temporary beams between sections. In addition, if necessary, the column steel frames 3 of the pre-assembled body A located in the direction between the beams should be
As shown in FIG. 4, they are connected by MiJ temporary cross beams 9.

Next, the ends of the main reinforcing bars 11 of horizontally adjacent beam members 4 are joined to each other at the center of the span.

This connection is performed using a so-called lock nut method using a coupler and a pair of nuts that are screwed into the spiral shape of the main reinforcing bar 11.
This is carried out by a known method such as a so-called grouting method using a coupler and an adhesive injected into the coupler.

In addition, after the two column steel frames 3 in one set of pre-assembled body A are completely fixed to the lower layer by welding, final tightening, etc., the fixing hardware 13 of the fixed main reinforcing bar 11 is tightened during foundation assembly. There is no problem in Toman even if the restrictions are relaxed. In this case, since the main reinforcing bars 11 can be rotated without effort, it is possible to perform spiral phase alignment of adjacent main reinforcing bars 11, and it is possible to easily join them using a lock nut method or the like.

Hereinafter, a similar pre-assembled body A is lifted above the pre-assembled body A on the lower floor, and the column steel frames 3 of the pre-assembled body A that are in contact with each other in the vertical direction are connected to each other at the center of the floor height as in the previous process. After joining, the process of joining the ends of the main reinforcing bars 11 of horizontally adjacent beam members 4 to each other is repeated to form the column steel frame 3 and the beam member C.
The structure is constructed in layers of copies.

In the above example, the main reinforcing bars 11 in 15 at the center of the span
One set of pre-assembly A has two column steel frames 3 connected by a single beam member C, and the lower layer of the column steel frames 3 is connected continuously. By fixing the steel frame 3 at the lower layer, it can stand on its own in a stable manner, so even if the horizontally adjacent beams h'Q of pre-assembled bodies A are in a free state, that is, the main reinforcing bars 11 of the beams are not connected. However, there is no problem with the construction. Therefore, the connection of the main reinforcing bars 11 is as follows:
After the construction of the floor slab 6, it is possible to go to the stepladder placed on the floor slab 6, and in this case, since the work will be done on the floor, it is not possible to safely join the main reinforcing bars 11. can.

As described above, according to the present invention, a spiral large-diameter reinforcing bar material formed by processing a spiral shape over the entire length of two adjacent column steel frames each having a length of 5 floors is used as the main part of a beam. The main reinforcing bars were used as reinforcing bars, and a stirrup was attached around the periphery.
A pair of steel plates attached to the opposite 7-lung portions of the main column steel frame are passed through the column at the first joint of the main column steel frame, and are screwed into the spiral shape of the main reinforcing bar. match. +L-foot fixing hardware is used to tighten both the front and back sides of the pair of 7-lunge parts 1 or 1 plate (fixed in a bent state, and both ends are constructed so as to protrude from each column steel frame (span by span). Since pre-assembly is used, there are fewer work steps compared to when the column steel frame and beam materials are hung separately, and
Not only does it reduce the number of on-site joints, but since one pre-assembled assembly has two pillar steel frames that are connected and integrated using iMl beams, the construction is more stable, and the two It can be built in a self-supporting state without using temporary beams to connect the upper ends of the steel columns (1j).

Moreover, after the two column steel frames of the pre-assembled body have been completely fixed to the lower layer by welding, final tightening, etc., even if the fixing hardware of the main reinforcing bars is tightened during the foundation assembly stage, One support for construction (
Therefore, when joining the main reinforcing bars of adjacent front assemblies at the center of the span, loosen the anchors and tighten the U of the main reinforcing bars.
By making rotation possible, it is possible to match the phase of the helical reinforcing bars, and they can be joined in a simple and inexpensive manner by screwing, such as a lock nut method.

Furthermore, one set of pre-assembled bodies has two column steel frames that are connected and integrated by a plurality of beam materials, and in order to fix the two pillar steel frames to the lower layer, adjacent pre-assembled bodies are As for the first joint of the beam (the main reinforcing bars are laid out and joined at the center of the span), there is no problem with erection even if it is left free. Therefore,
The main reinforcing bars at the center of the span can be joined safely and easily on the floor slab after the floor slab has been constructed.

In addition, when assembling the pre-assembled body into the ground, it is necessary to
Shape a pair of 7 flange parts or a steel plate at a predetermined position! , insert the main reinforcing bar of the beam into the hole where i! 1. Use a fixing hardware such as a nut that screws into the screw type of the main reinforcing bar. Because it is fixed in place, dimensional errors can be made extremely small. Therefore, combined with fewer on-site joints, it is possible to construct the building facing the opposite direction.

In particular, the main reinforcement of the beam at the flhj point of the column/beam is fixed by C! of the main reinforcement. Fixing hardware such as nuts that screw together with the helical mold can also be used as a pair of opposing flanges on two steel frames... or 1 yen for this! ? By tightening both the front and back dIs of a pair of steel plates with Iλi? ] In other words, each 7 lunge t-1) or the outside (ill Or, on the 1st floor where the main reinforcing bars are used as stiffeners (M+4), even if the cruciform joints of the columns and beams are subjected to bending force after the construction of the steel reinforced concrete structure, the sentient reinforcing bars will slip against the concrete. Since this does not occur, the joints have extremely good toughness.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view showing a conventional example, Fig. 2 is a cross-sectional plane ffl+ view of the pillar/beam point part i- in the conventional example, and Fig. 3 is a shelf and road surface view showing a conventional example. , FIGS. 4 to 7 show an embodiment of the present invention, where 4'lA is a perspective view, FIG. 5 is a flat view of the main part, and FIG. 6 is a stop view of the main part 1). FIG. 7 is a schematic top view. A...Pre-assembly, 3...Column steel frame, 4...Beam material, 11
...Main reinforcing bar, 12... Stirrup.

Claims (1)

[Claims] This is a steel-reinforced concrete structure construction method in which the columns are made of 5ITC and the beams are made of RC. Two adjacent column steel frames each having a length equivalent to multiple floors are machined into a spiral shape over the entire length. F41I main reinforcing bars are used as the main reinforcing bars of the beams, and stirrups are attached around the periphery of the beams for multiple floors. At the column/beam reinforcement point of the main column steel frame, pass vil*I and a pair of m&h through a pair of opposing 7 rung parts of the column steel frame or these, and connect the threads of the nit mark main reinforcing bar. A pair of fixing metal fittings with screw holes that screw into the mold are used to fix the front and back surfaces of a pair of 11 or ν plates with P1υ attached, and both ends are connected to each column steel frame (span by span). The structure 1v is constructed in a protruding state, and the column steel frames of vertically adjacent pre-assemblies are joined to each other at the center of the height by using a pre-assembled assembly that is installed horizontally adjacent to each other. A method for constructing a frame 1 of a steel-framed reinforced concrete structure using large-diameter reinforcing bars for beams, which is characterized by connecting the main reinforcing bars of the body beams to each other at the center of the span.