JPH08284315A - Method and device for assembling wall reinforcement unit - Google Patents

Abstract

PURPOSE: To facilitate assembly of a wall unit by a method wherein each of paired netted reinforcements is formed separately while hooking parts are formed at both ends of each of shear reinforcing bars, and the hooking parts are hung on and fixed to both of the netted reinforcements. CONSTITUTION: An inner netted reinforcement 2 and an outer netted reinforcement 3 are separately formed in latticework on bar arrangement beds 21 and 22, and hooking parts 4a are formed beforehand at both ends of each of shear reinforcing bars. With the outer netted reinforcement 3 kept in placement on the bar arrangement bed 22, the inner netted reinforcement 2 is hoisted, being hung down from a hanger beam 40, with a crane from the bar arrangement bed 21 and moved to a position above the outer netted reinforcement 3. The hanger beam 40 is suspended with jacks 32, and the shear reinforcing bars 4 are inserted through the inner netted reinforcement 2 and the outer netted reinforcement 3 with the distance between both of the netted reinforcements 2 and 3 slightly narrowed, and a unit 1 is formed with the hooking parts 4a hung on and fixed to the netted reinforcements. Therefore, a large-sized wall reinforcement unit can be assembled efficiently and precisely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for assembling a wall reinforcing bar unit used when forming a wall body made of reinforced concrete.

[0002]

2. Description of the Related Art In recent years, various construction methods have been proposed and put to practical use in order to rationalize the construction of construction and civil engineering structures. However, reinforced concrete wall bodies, especially walls with large wall thickness in large-scale structures. The rationalization of the wall reinforcement work when constructing the body has not been sufficiently rationalized, and it is the current situation that it is still necessary to rely on manual work.

FIG. 18 shows an example of reinforcement of a reinforced concrete wall having a large wall thickness. This constitutes a side wall of a large-scale underground structure which receives a large earth pressure, for example, and is a net consisting of a vertical bar a and a horizontal bar b made of rebar having a large nominal diameter of 38 mm or 41 mm. The muscles c and d are doubly arranged, and the net muscles c and d are connected to each other by the shear muscle e. Then, for the reinforcement work when constructing such a wall body, the inner and outer net reinforcements c and d formed in a grid shape are prepared in advance, and the outer net reinforcement c is first built and then the inner reinforcement The inner net streak d is built with a proper space secured, and then the hooks f and f formed at the tips of the shear streaks e and e are locked to the two net streaks c and d, respectively. After that, the base end portions of the shear muscles e, e are mechanically joined to each other or to the lap joint h.
The procedure of connecting to each other is generally adopted.

[0004]

However, in the conventional rebar work as described above, the outer rebar c is built in, the inner rebar d is built in, the shear rebars e, e are arranged and It was very time-consuming and inefficient because it was necessary to repeat the process of connecting. Further, when the shear joints e, e are connected to each other by the mechanical joint g, the cost of the mechanical joint g is high, and in the case of the lap joint h, the amount of the reinforcing bar is increased by the overlap margin. It is an obstacle to cost reduction.

Therefore, in order to solve the above-mentioned problems, it has been considered to reduce the work on site by unitizing the wall reinforcing bars in advance, and to use the mechanical joint g and the lap joint h. It is also considered to arrange the shear muscles e without using them. However, in order to realize such a thing, it is indispensable to develop a method for efficiently assembling the wall reinforcing bar unit, and there has been an urgent need to develop such a method.

[0006]

In view of the above circumstances, the invention as set forth in claim 1 is intended to provide an effective method for assembling a wall reinforcing bar unit, in which vertical and horizontal bars are provided. When assembling a wall reinforcing bar unit in which a pair of reticulate bars assembled in a lattice form are opposed to each other with a gap and are connected to each other by a shear bar, both of the pair of reticulated bars are individually formed, and By previously forming a hook portion that can be locked to each reticulum at both ends of the shear muscle, by placing one reticulum in a substantially horizontal state and suspending and supporting the other reticulum above it, Retaining the mutual spacing of both reticulums in a state of being slightly smaller than the length of the shear muscle, in that state so that the both ends of the reticulum to both reticulums so that the shear muscle straddles both reticulums. After inserting it in the opposite direction, other than the above The hooks at both ends of the shear muscle are locked to both net muscles by lifting the net muscle of the above, and then both ends of the shear muscle are welded or fastened to each net muscle to be fixed. It was done like this.

The invention according to claim 2 is a wall rebar unit assembling apparatus suitable for use in carrying out the above method, wherein both of the net bars are formed in a substantially horizontal state. Reinforcement bed of the table, and a suspension beam that transfers and suspends and supports the other reticulate muscle formed on the other rebar bed above one reticulate muscle formed on one rebar bed, It is placed around the one reinforcement bar,
A plurality of jacks are provided for supporting the suspension beam from below and operating in synchronization with each other to elevate and lower the suspension beam to adjust the mutual distance between the two mesh bars.

Further, the invention according to claim 3 is such that a raising machine for raising the assembled wall reinforcing bar unit is attached to the above-mentioned assembling apparatus, and the raising machine is almost in a horizontal state. Having a standing bed which stands upright, the wall reinforcing bar unit assembled on the standing bed is held in a substantially horizontal state, and the standing bed is raised so that the wall reinforcing bar unit stands up in a substantially vertical state. It was done like this.

[0009]

According to the method of the present invention, the hook portions are formed in advance on both ends of one shear muscle, and both of the separately formed net muscles are opposed to each other in a state of being close to each other. By inserting the shear muscles into both of them and then expanding the distance between the net muscles to an appropriate distance, the hook portions at both ends of the shear muscle are locked to both net muscles. Therefore, it is not necessary to use two shear muscles and connect them by a mechanical joint or a lap joint as in the prior art.

Further, in the apparatus of the present invention, the one net bar formed in the other bar is transferred above the one net bar formed in the horizontal state on the bar by the hanging beam, By supporting the suspension beam with a jack, both net reeds are made to face each other in a close state. Then, after inserting the shear muscles having hook portions formed at both ends into both of the net muscles, the hanging beam is jacked up to widen the distance between the net muscles, so that the hook portions of the shear muscles are connected to each other. It is locked to the muscle, and in that state, the shear muscle is fixed to both reticulate muscles.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 5 show a wall reinforcing bar unit 1 (hereinafter simply referred to as unit 1) used in this embodiment. This unit 1 is applied to the side wall of a large-scale underground structure, and has a pair of inner reticulum 2 and outer reticulum 3, which are curved corresponding to the shape of the side wall, and those reticulum 2, 3 It is composed of a shear muscle 4 (see FIG. 4 and FIG. 5) for connecting together and a reinforcing frame 5.

Each of the reticular muscles 2 and 3 is composed of a large number of longitudinal muscles 6 and transverse muscles 7 assembled in a lattice, and the shear muscles 4 have hook portions 4a formed at both ends thereof. It is fastened and fixed by a numbered wire or the like while being locked to the second and third parts. As shown in FIG. 3, the reinforcing frame 5 is composed of an angle member 8 and a brace member 9, and is fastened to the net rebars 2 and 3 by a U-bolt 10 and attached between the net rebars 2 and 3. . In addition, in the unit 1 of the present embodiment, the reinforcing frame 5 is horizontally attached in four steps as shown in FIG. 1, and the suspending tool 11 used when hoisting the unit 1 is attached to the uppermost reinforcing frame 5.
Is attached.

The unit 1 described above is shown in FIGS.
As shown in FIG. 5, the adjacent ones are sequentially built up in a state of being partially overlapped so as to be continuous in the left-right direction and the up-down direction, and the reinforcement of the side wall is configured as a whole.

The procedure for assembling the unit 1 will be described together with the configuration of the assembling apparatus. First, as shown in FIG.
The inner reticulum 2 and the outer reticulum 3 are arranged in the rebar bed 2
They are individually formed on the electrodes 1 and 22 in a lattice shape having a predetermined size and shape. As shown in FIG. 7 to FIG. 9, the reinforcing bar bed 21 for forming the inner side net reinforcement 2 has a support frame 24 vertically and horizontally assembled on a base frame 23 and supported by columns 25. The support frame 24 is curved in accordance with the curvature of the inner net muscle 2 to be formed, and the vertical stripes 6 and the horizontal stripes 7 are arranged on the support frame 24 in a grid pattern and assembled. Note that the horizontal streaks 7 are only arranged on the support frame 24, and naturally bend along the support frame 24 to have a desired curvature, and therefore, it is not necessary to perform bending in advance. Reference numeral 26 in FIG. 9 is a notch groove 2 for positioning each lateral bar 7.
A ruler plate 6a is formed, and 27 is a ruler plate for aligning one end of each vertical stripe 6 to perform its positioning.

On the other hand, the reinforcing bar bed 22 for forming the outer reticulum 3 is also the same as the reinforcing bar bed 21.
As shown in FIGS. 10 to 12, the support frame 2 which is curved corresponding to the curvatures of the base frame 28 and the outer net reinforcement 3.
Although it is composed of 9, a column 30, and a ruler plate 31, a plurality of posts 33 for supporting the jack 32 are further provided around the bar arrangement bed 22 (eight in the illustrated example).
In addition to being installed, a hydraulic pressure supply device 34 connected to the jacks 32 is additionally provided. As shown in FIG. 11, the hydraulic pressure supply device 34 includes a hydraulic pump 35, main pipelines 36a and 36b on the supply side and return side, manifolds 37a and 37b on the supply side and return side, and branch pipelines on the supply side and return side. The jacks 32 are composed of 38a and 38b and are operated simultaneously in synchronization with each other.

As described above, the respective bar arrangement beds 21 and 22 are arranged.
When the inner reticulum 2 and the outer reticulum 3 are individually formed in the above, the reticulums 2 and 3 are assembled together by the shear 4 and the reinforcing frame 5. The procedure will be described below. The shear muscle 4 has hook portions 4a, 4a formed at both ends thereof in advance. Also, each angle member 8 and the brace member 9 of the reinforcing frame 5 may be processed in advance into desired shapes and dimensions.

As shown in FIG. 6 (b), the outer net reinforcement 3 is arranged on the reinforcement bed 22 as it is, and the inner reinforcement 2 is lifted from the reinforcement bed 21 by a suspension beam 40 driven by a crane. Transfer to above the outer reticulum 3.
As shown in FIGS. 13 and 14, the suspension beam 40 is composed of a curved main frame 41 and a reinforcing frame 42 above the curved main frame 41, and a suspender 43 for suspending and supporting the inner net reinforcement 2 under the main frame 41. Is attached,
On the lower surface sides of both ends of the main frame 41, jack connecting members 44 that can be fitted to the tips of the jacks 32 installed on the posts 33 are attached.

The suspension beam 40 that has transferred the inner net line 2
Is supported by the jacks 32 as shown in FIG. 6 (c), and the jacks 23 are kept in a lowered state, so that the jacks are suspended and supported from the outer net reinforcement 3 and the suspension beam 40 on the reinforcement bar 22. The space between the inner reticulum 2 is slightly narrower than the proper space to be finally set. Then, in this state, the shear muscle 4 in which the hook portion 4a is formed in advance is inserted into both the net muscles 2 and 3, and the hook portion 4a is appropriately scratched by the net muscles 2 and 3.

Then, the suspension beams 40 and the inner net reeds 2 are slightly lifted by operating the jacks 32 in synchronism with each other at the same time, so that the mutual distance between the two nets 2 and 3 should be finally set. Expand to even intervals.
As a result, as shown in FIG. 6 (d), the hook portions 4a, 4a of the shear muscle 4 are naturally locked to both the net muscles 2, 3. Therefore, the shear muscles 4 are fastened to the braids 2 and 3 by the numbered wire, and the reinforcing frame 5 is attached between the braided ribs 2 and 3 at a predetermined position. The unit 1 is completed by properly attaching various temporary materials related to. Figure 6 shows the finished product
As shown in (e), it is hoisted by the hoisting beam 40, transferred to a temporary storage yard, and stocked until it is built.

By assembling the unit 1 according to the above procedure using the assembling apparatus described above, a large-scale unit 1 using the large-diameter vertical bar 6 and the horizontal bar 7 can be efficiently and sufficiently managed. It is possible to assemble with high accuracy, and therefore, by arranging them all at once, the work of bar arrangement on site can be greatly reduced, which can contribute to labor saving and construction cost reduction.

Further, after the shear muscles 4 are inserted while keeping the both net muscles 2 and 3 close to each other, the inner net muscles 2 are jacked up so that the hook portions 4 at both ends of the shear muscles 4 are inserted.
Since the a and 4a are locked to both the net muscles 2 and 3, it is possible to employ only one shear muscle 4, and therefore, as in the conventional general case shown in FIG. Since it is not necessary to connect the two shear lines e, e by the mechanical joint g or the lap joint h, labor saving and construction cost reduction can be achieved also in this respect. The shear muscle 4 may be used as a scaffold, but in that case, sufficient strength is secured.

By the way, when the unit 1 of the finished product temporarily placed in the temporary placing yard is to be built, it is necessary to lift the unit 1 from the horizontal state to the vertical state. At this time, if the unit 1 itself has sufficient rigidity to withstand the erecting, the unit 1 may be simply lifted by a crane to erect, but the rigidity of the unit 1 is insufficient so that the unit 1 cannot withstand the erecting. If
In other words, if there is a concern that the unit 1 itself may be bent and deformed due to its own weight during lifting,
It is sufficient to attach a erection machine 50 as shown in FIGS. 5 to 17 and use it to erection the unit 1.

The erection machine 50 in this embodiment is composed of a base frame 51 and a standing bed 53 connected to the base frame 51 at the base side by a shaft 52 so as to be vertically erected. The unit 1 is held on the standing bed 53, and the upper side of the unit 1 is lifted by a crane to stand up, so that the unit 1 can stand up without applying any load.

If such a raising machine 50 is used,
Even a unit 1 which has insufficient rigidity and cannot stand up by itself can be built without any trouble. In other words, assuming that such a erection machine 50 is used, the unit 1 may have a low rigidity, and therefore, even when the reinforcing frame 5 is unnecessary or provided, the minimum necessary amount is sufficient. As a result, the cost required for the reinforcing frame 5 can be reduced, and the weight of the unit 1 can be reduced.

In the case where the reinforcing frame 5 is provided for the purpose of ensuring rigidity when the unit 1 itself is built up without using the above-mentioned building machine 50, when the reinforcing frame 5 is provided. It is naturally effective to provide the vertical direction instead of the horizontal direction. However, when the reinforcing frame 5 is provided in the vertical direction in this way, the concrete is expanded horizontally by the reinforcing frame 5 when placing concrete. This is impeded, and as a result, the filling property of concrete is impaired. On the other hand, if it is premised that the erecting machine 50 as described above is used, even if the reinforcing frame 5 is provided, it need not be provided in the vertical direction at all, and, for example, in the horizontal direction as in the above embodiment. Since it is sufficient to provide it, there is no hindrance to the horizontal spreading of the cast concrete, and there is no fear of impairing the filling property.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and the form and size of the unit 1 and the detailed structure of the assembling apparatus are variously designed. It can be arbitrarily changed. For example,
Since the unit 1 in the above-described embodiment is applied to a curved wall body, both of the mesh lines 2 and 3 are curved. However, when the unit 1 is applied to a planar wall body, it is not curved. Of course, the flat unit 1 may be used, and in that case, the support frames 24 and 29 of the arranging beds 21 and 22 and the standing bed 53 of the erecting machine 50 may be simply flat.

Further, the assembling apparatus of the above-mentioned embodiment is provided with a erection machine 50 for erection of the finished unit 1, but the erection machine 50 is not always necessary, and the unit 1 itself has sufficient rigidity. In the case of having the above, the erecting machine 50 may be omitted. Alternatively, by making the support frame 29 in the reinforcing bar 22 for forming the outer side net bars 3 upright like the standing bed 53, the reinforcing bar 22 can also be used as a erection machine. Is. Further, the erection machine 50 of the above-described embodiment is configured such that the standing bed 53 is lifted by the crane so as to stand up.
It is conceivable to mount a drive source such as a hydraulic jack for overturning on the raising machine 50.

[0028]

As described above, according to the assembling method of the present invention, a pair of net muscles are opposed to each other in a state where they are close to each other, and a shear muscle is inserted through them, and then the mutual spacing between them is expanded and sheared. Since the hooks of the muscles are locked to both reticulums, and then the shears and braids are fixed, it is possible to assemble a large-scale wall rebar unit efficiently and accurately with sufficient control. Not only is it possible, but it is also possible to use one single shear muscle, resulting in a significant labor saving compared to the conventional case where two shear muscles were connected by a mechanical joint or a lap joint. And the construction cost can be reduced.

Further, the assembling apparatus of the present invention includes a rebar bed for forming both reticles, a suspension beam for transferring the other reticulation above one reticulation and stacking it, and a suspension beam. Since it is provided with a jack for adjusting the mutual spacing of the net streaks by jacking up, the above method can be easily and surely carried out, and is suitable for use when carrying out the above method. Furthermore, if an erecting machine for erecting the completed wall reinforcing bar unit is additionally provided, the rigidity of the wall reinforcing bar unit at the time of erecting can be low, and therefore the reinforcing frame can be unnecessary or can be minimized.

[Brief description of drawings]

FIG. 1 is a front view showing an example of a wall reinforcing bar unit assembled by the method of the present invention.

FIG. 2 is a plan view of the unit.

FIG. 3 is a partially enlarged plan view of the unit.

FIG. 4 is a plan view showing a state in which the unit is installed.

FIG. 5 is a vertical cross-sectional view showing a state in which the unit is installed.

FIG. 6 is a flowchart showing a work procedure in an assembly method which is an embodiment of the present invention.

FIG. 7 is a front view showing a bar arrangement bed for forming internal meshes in the assembling apparatus which is an embodiment of the present invention.

FIG. 8 is a plan view of the same.

FIG. 9 is an enlarged view of a main part of the same.

FIG. 10 is a front view showing a bar arrangement bed for forming outer meshes in the assembling apparatus which is an embodiment of the present invention.

FIG. 11 is a plan view of the same.

FIG. 12 is an enlarged view of a main part of the same.

FIG. 13 is a front view showing a suspension beam in the assembling apparatus that is an embodiment of the present invention.

FIG. 14 is a plan view of the same.

FIG. 15 is a side view showing the erection machine in the assembling apparatus that is an embodiment of the present invention.

FIG. 16 is a plan view of the same.

FIG. 17 is a front view of the same.

FIG. 18 is a diagram showing an example of bar arrangement in a concrete wall body.

[Explanation of symbols]

 1 Wall Reinforcing Bar Unit 2 Inner Net Reinforcing Bar 3 Outer Net Reinforcing Bar 4 Shear Reinforcing Bar 4a Hook Part 5 Reinforcing Frame 6 Vertical Bar 7 Horizontal Bar 21,22 Reinforcing Bed 32 Jack 40 Hanging Beam 50 Erecting Machine 53 Standing Bed.

Claims (3)

[Claims] 1. When assembling a wall reinforcing bar unit in which a pair of net reinforcing bars, which are composed of vertical bars and horizontal bars, are opposed to each other with a gap and are connected to each other by a shear bar, the pair of net bars is provided. Both of them are individually formed, and hook portions capable of engaging with the reticulated muscles are formed in advance at both ends of the shear muscle, and one of the reticulated muscles is placed in a substantially horizontal state and the other mesh is By suspending and supporting the muscles above them, the mutual distance between the two reticulums is kept slightly smaller than the length of the shear muscles, and in that condition the shear muscles straddle both reticulum muscles. After inserting both end portions of the reticulum to both reticulums, the hook portions at both ends of the shear muscle are locked to both reticulums by lifting the other reticulum, , Pair both ends of the shear muscle with each Method of assembling the wall rebar unit, characterized in that the welded or fastened and fixed Te. 2. An apparatus for assembling a wall reinforcing bar unit used when carrying out the assembling method according to claim 1, wherein two rebar beds are provided for forming both of the net bars in a substantially horizontal state. And above one reticulum formed on one rebar bed,
A suspension beam that transfers and suspends the other net reinforcement formed on the other reinforcement bed, and a suspension beam that is arranged around the one reinforcement bed and supports the suspension beam from below and operates in synchronization. And a plurality of jacks for adjusting the mutual spacing between the net bars by raising and lowering the suspension beam. 3. The apparatus for assembling a wall reinforcing bar unit according to claim 2, further comprising a standing bed that stands up from a substantially horizontal state to a substantially vertical state, and the wall reinforcing bar unit is substantially horizontal on the standing bed. An apparatus for assembling a wall reinforcing bar unit, further comprising a erection / raising machine for standing up the wall reinforcing bar unit in a substantially vertical state by holding the standing bed upright.