JPH0358027B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a beam reinforcement construction method.

Conventional beam reinforcement construction methods are generally constructed using the construction methods illustrated in FIG. 1A to 1E.

Therefore, to explain the outline, spacers 2 are installed on the temporary frame 1 of the beam, several receiving members 3 are arranged at appropriate intervals in the longitudinal direction of the temporary frame 1 and on the slab floor, and the receiving members 3 Place the necessary lower main reinforcements 4, middle suspension main reinforcements 5, and upper main reinforcements 6 on top,
These are suspended on temporary frame 1 (state A in the same figure).

Next, a plurality of stirrups 7 are inserted into the suspended lower, middle, and upper main reinforcements 4, 5, and 6, and the stirrups 7 are hooked thereto (the state shown in FIG. 3B).

When the main suspension reinforcements 5 are required as in this example, the lower main reinforcements 4 and the main suspension reinforcements 5, etc. are separated, and several more receiving members 8 are inserted between them (the state shown in Figure C). ).

In this state, the first receiving member 3 is pulled out and the lower main reinforcing bars 4 are dropped onto the horizontal portions of the stirrups 7, and they are arranged approximately evenly (state D in the figure).

Then, the stirrups 7 and the lower main reinforcements 4 are connected with thin wire binding wires, but in this case, as in the arrangement described above, the worker lifts the middle, cuts through the upper main reinforcements 5 and 6, and inserts his hand from above. At times, they lie on their stomachs to perform the tying work (as shown in Figure 1).

Next, the main suspension reinforcements 5 and the upper main reinforcements 6 are separated, and several other receiving members 9 are inserted between them (the state shown in the same figure), and the support bars 10 that support the main suspension reinforcements 5 are inserted as described above. In the same way as above, insert your hand from above while pushing aside the upper main reinforcements 5 and 6, and tie it to the stirrup 7 with iron wire (the state shown in Figure 3).

Next, the main suspension reinforcement 5 is placed on the support bar 10 (the state shown in Figure 1), and the main reinforcement 5 is
and the support bars 10 are inserted from above while passing through the upper main bars 6, and are arranged and tied together with iron wire (the state shown in Fig. 1).

Thereafter, the stirrup bars 11 are tied together with iron wire across the bent portion of the upper end of the stirrup bars 7 (the state shown in Figure 1), and the upper main reinforcement 6 is placed on the stirrup bars 11 and tied together (the state shown in Figure 2). situation).

With this, the beam reinforcement is, in principle, completed.

Finally, by pulling out the receiving member 9 that suspends the upper main reinforcement 6 and dropping the assembled beam reinforcement onto the spacer 2 in the temporary frame 1, the beam reinforcement is completed. be. Such conventional construction methods had the following drawbacks.

(1) This is a method of inserting stirrups after placing upper and lower main reinforcements and, if necessary, center suspension main reinforcements, which is difficult to insert and also makes it difficult to arrange stirrups at approximately equal intervals with respect to the various main reinforcements. Something.

(2) After arranging the upper and lower main reinforcements, the lower main reinforcement, if necessary, the middle suspension main reinforcements and then the upper main reinforcements are aligned and tied. The main suspension bars and top main bars get in the way, making these tasks difficult and time-consuming, and the workability is poor.

(3) In particular, when arranging and tying the lower main reinforcement, workers often have to work while lying on their stomachs, and the higher the effectiveness of the beam, the more essential the above-mentioned work becomes, and the easier the work becomes. It gets extremely bad.

(4) The receiving member must be inserted or pulled out by dividing it into various main reinforcements, which is very troublesome.

(5) As mentioned above, the construction period is prolonged due to poor workability, and it is necessary to secure workers, which poses economic problems.

As an example of a method for solving the conventional drawbacks, the following technical literature can be cited.

That is, there is a construction method using underground beams with a large beam width, as disclosed in Japanese Patent Application Laid-Open No. 58-13833.

The present invention is a beam assembly method in which a portion corresponding to one side surface having a beam abdominal reinforcement, a portion corresponding to a beam bottom having a beam abdominal reinforcement, and a portion corresponding to the lower end of the other side surface are bent and the top surface is open. , and provide a cage-shaped strip that lacks a portion corresponding to the other side surface.

A portion corresponding to the beam bottom end of a core reinforcement provided with a beam bottom abdominal muscle is provided in a portion corresponding to the beam bottom of the cage reinforcement.

A portion corresponding to the core muscle including a beam abdominal muscle is provided at a portion corresponding to the lower end of the beam formation of the core muscle.

On-site assembly work is carried out in which a mesh is assembled to the part corresponding to the lower end of the other side surface, and the part corresponding to the other side surface is assembled on-site while the joint is attached; To stabilize the parts corresponding to both sides, by arranging and tying the stop bars in order to stabilize the parts corresponding to both sides. The present invention is comprised of: providing an upper main reinforcement; and providing a mesh material so as to overlap the upper main reinforcement.

Therefore, in this cited invention, in order to construct the frame reinforcement of the beam, as described above, a mesh material is assembled to the portion corresponding to the lower end of the other side surface, and the portion corresponding to the other side surface is assembled on-site while installing the joint. , requires on-site assembly work.

Therefore, the present invention requires extra effort in configuring the frame reinforcement, and it may be difficult to ensure accuracy between the other side surface portion and one side surface portion, and this accuracy In order to ensure this, considerable skill is required.

In addition, in order to stabilize the portions corresponding to both side surfaces, it is necessary to assemble a mesh material to the portion corresponding to the lower end of the other side surface to provide the portion corresponding to the other side surface, which is quite complicated and time-consuming.

In view of the above, it is an object of the present invention to achieve accuracy in reinforcement work, as well as ease of reinforcement work or easing of reinforcement work.

In addition, it provides a beam reinforcement construction method that makes effective use of integrally structured frame reinforcement from the beginning and does not require stop bars, etc., and is greatly useful for simplifying and speeding up reinforcement work, etc. Also, a reduction in the number of personnel can be expected.

It was created for the purpose of

An embodiment of the present invention will be described below with reference to the drawings.

First, several stirrups 21 that are approximately inverted U-shaped when viewed from the side are erected at appropriate intervals, and both vertical portions 2
Horizontal reinforcements 22 are arranged at 1' and 21', respectively, and are welded or bound with thin wire binding wires to form frame reinforcements 23 as shown in FIGS. 2 and 3.

Usually, the frame reinforcement 23 is produced in a factory.

However, the size in the width direction or the length in the longitudinal direction of the frame reinforcement 23 varies depending on the location where it is provided.

Specifically, for example, the size in the width direction refers to the width of the temporary frame 24 or 24' of the beam formed in the short side X direction (in the drawing in FIG. 4).
Refers to the width in the vertical direction. ), or the width of the temporary frames 24'', 24a'' of the beam formed in the long side Y direction (in Fig. 4, this refers to the width in the left and right direction on the drawing). (However, this is just an example and is not limited to this example.)

Furthermore, the length in the longitudinal direction means, in the short side X direction as shown in FIG.
44', that is, the span interval 100, and in the long side Y direction as shown in FIG. That is, the span interval is 200 (however, this is an example and is not limited to this example).

Then, as shown in Figure 4, the temporary frames 44, 44' of the pillars are
The frame reinforcement 23 is not provided inside.

As described above, frame reinforcements 23 with approximately the same length as the span interval 100 are placed in the temporary frame 24 of the beam in the short side X direction,
24', frame reinforcing bars 23 of approximately the same length as the span interval 200 are placed on the temporary frames 24'' and 24a'' of the beams.
By inserting the frame reinforcements 23 into the temporary frames 24, 24', 24'', and 24a'' of all the illustrated beams, the frame reinforcements 23 are installed via the spacers 24a (the state shown in FIG. 5A). ).

In this state, for example, the horizontal position of the stirrup 21 of the frame reinforcement 23 arranged on the temporary frame 24 (24' is the same below, and will be described as 24 as a representative) of each beam in the short side X direction. Several lower main reinforcements 25 are arranged at approximately equal intervals in the longitudinal direction of the so-called temporary frame 24 in the direction perpendicular to the section 21'' (the state shown in FIG. 5B), and then the stirrups 21 and the lower main reinforcements 25 are connected with iron wire. Tie it up (state shown in Figure 5C).

After that, the temporary beam frame 24'' (24
The same applies to a'', and 24'' will be explained as a representative. ), several lower main reinforcements 125 are arranged at approximately equal intervals in the longitudinal direction of the so-called temporary frame 24'' in a direction perpendicular to the horizontal portion 21'' of the stirrup 21 of the frame reinforcement 23 arranged in It is superimposed on each lower main reinforcement 25 in the direction. (See the state in Figure 5D).

Next, the stirrup 21 and the lower main reinforcement 125 are tied together with iron wire (see the state shown in FIG. 5D).

When the reinforcement of the lower main reinforcements 25, 125 in the short side X and long side Y directions is completed in this way, both the lower main reinforcements 25, 125 are
5 are intersected and overlapped, and each is tied to several main reinforcements 225 of the column (finally, the state shown in FIG. 5D is obtained).

Then, depending on the case, for example, the support bars 27 are passed below both vertical parts 21', 21' of the stirrups 21 arranged on the temporary frames 24, 24' of the beams in the short side X direction,
The support bars 27 are passed and tied below both vertical portions 21', 21' (state shown in FIG. 5E).

Next, several lower main suspension reinforcements 28 (hereinafter simply referred to as main suspension reinforcements 28) are placed on this support bar 27 and perpendicular thereto (the state shown in Fig. 5F), and the support bars 27 and Bind the main reinforcement 28.

This completes the reinforcement arrangement and bundling of the support bars 27 in the short side X direction and the lower suspension main bars 28 (state shown in FIG. 5G).

After that, both vertical parts 12 of the stirrup 21 of the frame reinforcement 23 arranged on the temporary frame 24'' of the beam in the long side Y direction
1', on the support bars 127 that have already been tied,
Several lower main suspension bars 128 are arranged in a direction orthogonal to the support bars 127, and the lower main bars 128 are tied to the support bars 127.

Also, the vertical portion 2 of the stirrup 21 in the short side X direction
1', 21' and the horizontal reinforcements 22 can be constructed by bundling several auxiliary reinforcements 30, or by connecting several auxiliary reinforcements 130 to the vertical parts 121', 121' of the long side Y-direction stirrups 21 and the horizontal reinforcements 22. A binding method is also adopted.

In this way, when the reinforcement of the lower main suspension reinforcements 28, 128 in the short side , 128 are arranged so that they intersect and overlap each other, and are tied to several main reinforcements 225 of the column (the state shown in FIG. 5H).

After that, when arranging the upper main suspension reinforcement 32 (hereinafter simply referred to as the main suspension reinforcement 32), for example, place the support member 31 on the upper end of the temporary frame 24' of the beam in the short side X direction. Several main suspension reinforcements 32 are placed on the short side X side (the state shown in Fig. 5I).

Next, the support bars 33 are attached to both vertical parts 21', 2 of the stirrup 21 so as to straddle the main suspension bars 32.
1' and above both vertical parts 21' and 21', support bars 33 are passed and tied (see the state shown in FIG. 5J).

Next, several main suspension reinforcements 32 are placed below this support bar 33 and perpendicular thereto, and the support bars 33 and main suspension bars 32 are tied together, and then the receiving member 31 is pulled out (finally, Figure 5 J condition).

A similar operation is performed on the long side Y side (not shown).

After that, several upper main reinforcements 34 are arranged on the support reinforcements 33 on the short side , perform similar operations.

Next, the support bars 33 on the short side X side or the long side Y
Several stirrups 35 are arranged at appropriate intervals so as to be orthogonal to each of the side support bars (not shown), and the stirrups 35 are tied to the upper end of the frame reinforcement 23.

Then, the upper main reinforcements 34 on the short side X side or the long side Y side are attached and tied together while lifting them below the stirrup reinforcements 35 that have been tied together as described above. The beam reinforcement is completed (state shown in Figure 5 L).

Although not shown, when the main suspension reinforcement 32 is not installed, for example, the temporary frames 24, 24' of the beam on the short side
A receiving member (not shown) is passed at appropriate intervals, and several upper main reinforcements 34 are arranged on this receiving member (not shown).

Next, several upper main reinforcements (not shown) are arranged on the long side Y side through a similar operation.

After that, the reinforcement and binding of the stirrup bars 35,
In addition, operations such as arranging and binding the upper main reinforcement 34 and the upper main reinforcement (not shown), and pulling out the receiving member (not shown) are performed in the same manner as in the above-mentioned example.

The beam reinforcement is completed here.

After that, the temporary frames 24 and 2 of the beams are used as before.
4', 24'', 24a'' or temporary frame of the column 44, 4
Pour fresh concrete into 4'.

As described in detail above, the present invention involves arranging the frame reinforcements of the beams with open tops, which are manufactured in advance in a factory, within the temporary frames of the beams and between the spans, and then the lower main reinforcements. , the upper main reinforcement is arranged and then the stirrup reinforcement is provided.

Therefore, it has the following effects, which are specifically listed below.

In the present invention, as described above, since the frame reinforcement is configured in advance as designed, the stirrups and transverse reinforcement can be arranged in the temporary frame of the beam as designed.

As mentioned above, after the stirrups and transverse reinforcements have been arranged as designed, the upper and lower main reinforcements or stirrup bars can also be arranged as designed, which improves the accuracy of the reinforcement work and facilitates the reinforcement work. Alternatively, the bundling work can be facilitated.

Further, according to the present invention, it is possible to improve the strength of beams, columns, etc. by improving the accuracy of so-called reinforcement arrangement, which allows the reinforcement to be arranged according to the design of stirrups and transverse reinforcements, or upper and lower main reinforcements, and stirrup reinforcements.

Furthermore, in the present invention, since the frame reinforcement has an integral structure from the beginning, there is no need to provide a stopper reinforcement to stabilize the frame reinforcement, which greatly simplifies and speeds up reinforcement work, etc. This is a useful place.

We can also expect a reduction in personnel.

Furthermore, in the present invention, the frame reinforcement maintains its shape even without providing the width-stopping reinforcement (supporting reinforcement), and no special consideration is required to maintain the shape. Facilitation or facilitation of the bundling work is achieved.

[Brief explanation of drawings]

FIGS. 1A to 1E are schematic diagrams showing an example of a conventional reinforcement construction method. Figures 2 to 5 show the beam reinforcement construction method of the present invention. First, Figure 2 is a schematic front view of the frame reinforcement, Figure 3 is a schematic plan view of the same, and Figure 4 is the temporary frame of the beam and FIGS. 5A to 5L are schematic diagrams showing an example of the reinforcing construction method. 21... Stirrups, 22... Transverse bars, 23... Frame bars, 24, 24', 24'', 24a'', 44, 44'
... Temporary frame, 24a ... Spacer, 25 ... Lower main reinforcement, 26, 26' ... Tibial muscle, 27 ... Supporting reinforcement,
28... Main suspension reinforcement, 30... Auxiliary reinforcement, 31... Reception member, 32... Main suspension reinforcement, 34... Top main reinforcement, 3
5...Stirrel frame.

Claims (1)

[Scope of Claims] 1. A frame in which a frame reinforcement with an open upper surface is made in advance by providing several horizontal reinforcements in a large number of stirrups that are arranged at appropriate intervals and have an approximately inverted U-shape when viewed from the side. Reinforcement construction work, and frame reinforcement work in which frame reinforcements with open tops and predetermined lengths, which have already been constructed in this frame reinforcement construction work, are inserted at span intervals within the temporary frame of the beam through spacers. Next, several lower main reinforcements were placed perpendicular to the horizontal part of the frame reinforcement stirrups inserted into the temporary frame of the beam, and each lower main reinforcement and stirrup arranging and tying the lower main reinforcing bars to bind the beams, and then placing the upper main reinforcing bars in the temporary frame of the beam via receiving members so that they overlap the inserted lower main reins at intervals. Next, each stirrup reinforcement is placed at the upper end of each of the above-mentioned stirrup bars so as to straddle each of the above-mentioned upper main reinforcements, and this stirrup reinforcement and the above-mentioned stirrup reinforcement arranging and tying the stirrup bars to tie together the upper main bars and the stirrup bars, then removing the receiving member and tying the upper main bars to bind the upper main bars and the stirrup bars, respectively, and assembling the bar arrangement of the beam. A beam reinforcement construction method characterized by the following.