JP3281974B2 - Method and apparatus for assembling wall rebar unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[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 architectural and civil engineering structures. However, reinforced concrete walls, particularly large-wall walls in large-scale structures, have been proposed. Sufficient rationalization has not been achieved for the work of arranging the wall reinforcement when constructing the body, and at present it is necessary to rely on manual work.

FIG. 18 shows an example of reinforcing bars of a reinforced concrete wall having a large wall thickness. This constitutes, for example, a side wall of a large-scale underground structure subjected to a large earth pressure, and is composed of a longitudinal bar a and a horizontal bar b made of a large-diameter reinforcing bar having a nominal diameter of, for example, 38 mm or 41 mm. In this embodiment, the muscles c and d are arranged in a double manner, and the meshes c and d are connected to each other by a shearing muscle e. And, in the rebar arrangement work at the time of constructing such a wall body, the inner and outer mesh bars c and d formed in a lattice shape are prepared in advance, and the outer mesh bar c is first erected, and then the inner mesh bar c is set inside. The inner reticulation line d is erected at an appropriate interval, and then the hooks f, f formed at the tip of the shearing bars e, e are engaged with the two reticulation lines c, d, respectively. After that, the proximal ends of the shearing bars e and e are connected to each other by the mechanical joint g or the lap joint h.
Is generally adopted.

[0004]

However, the above-described conventional bar arrangement work involves the construction of the outer reinforcing bar c, the inner reinforcing bar d, the arrangement of the shear bars e, and the reinforcing bars thereof. This is a very laborious and inefficient process, since the connection is repeated. Further, when the shear bars e and e are connected to each other by the mechanical joint g, the cost of the mechanical joint g increases, and when the lap joint h is used, the amount of reinforcing steel increases by the overlap margin. This is an obstacle in reducing costs.

[0005] Therefore, in order to solve the above-mentioned problems, it has been studied to reduce the work on site by unitizing the wall rebar in advance, and to use a mechanical joint g or a lap joint h. It is also considered to arrange the shearing muscles e without any reinforcement. However, in order to realize such a thing, development of a method for efficiently assembling the wall rebar unit is indispensable, and development of such a method has been urgently needed.

[0006]

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide an effective method for assembling a wall reinforcing bar unit, wherein a vertical bar and a horizontal bar are provided. When assembling a wall reinforcing bar unit in which a pair of mesh bars arranged in a lattice form are connected to each other by a shear bar facing each other at an interval, each of the pair of mesh bars is individually formed, and By forming in advance hook portions that can be engaged with each reticulation at both ends of the shearing muscle, placing one reticulation in a substantially horizontal state and suspending and supporting the other rein above, The mutual spacing between the two reticulations is kept slightly smaller than the length of the shearing muscle, and in this state, both ends thereof are respectively connected to both the reticulating muscles so as to straddle the shearing muscle. After passing through the other The hooks at both ends of the shearing muscle are locked to both the meshes by lifting up the mesh of the shearing muscle, and then both ends of the shearing muscle are welded or fastened to each mesh, and fixed. It is like that.

According to a second aspect of the present invention, there is provided an apparatus for assembling a wall reinforcing bar unit suitable for performing the above method, wherein the two reinforcing bars are formed in a substantially horizontal state. A bar arrangement bed, and a suspension beam for transferring and suspending and supporting the other reinforcement line formed on the other reinforcement arrangement bed above the one reinforcement line formed on one reinforcement arrangement bed, Placed around the one rebar bed,
A plurality of jacks are provided for supporting the suspension beam from below and operating in synchronization with the suspension beam to raise and lower the suspension beam so as to adjust the mutual distance between the two reinforcing bars.

Further, according to a third aspect of the present invention, an erecting machine for erecting the assembled wall rebar unit is attached to the above assembling apparatus, and the erecting machine is moved from a substantially horizontal state to a substantially horizontal state. It has an upright bed that stands upright, and holds the wall rebar unit assembled on the upright bed in a substantially horizontal state to stand up the upright bed, so that the wall rebar unit stands upright. It is like that.

[0009]

According to the method of the present invention, hook portions are formed in advance at both ends of one shearing bar, and both of the previously formed bar bars are opposed to each other in a state of approaching each other. By inserting the shear muscles into both, and then increasing the spacing between the mesh muscles to an appropriate interval, the hook portions at both ends of the shear muscles are locked to both mesh muscles. Therefore, it is not necessary to connect them with a mechanical joint or a lap joint using two shearing bars as in the related art.

[0010] In the apparatus of the present invention, the other rebar formed by the other rebar bed is transferred by a suspension beam above one reticulated bar formed in a horizontal state on the rebar bed. The suspension beam is supported by the jack so that both reticulations are brought close to each other. Then, after inserting the shearing bars having hook portions formed at both ends in advance into both the reticulation bars, the hanging beam is jacked up to widen the interval between the reticulating bars, so that the both hook portions of the shearing bars are connected to both nets. The muscles are locked, and in this state, the shear muscles are fixed to both reticulated muscles.

[0011]

An embodiment of the present invention will be described below with reference to the drawings. 1 to 5 show a wall reinforcing unit 1 (hereinafter simply abbreviated as unit 1) used in the present embodiment. The unit 1 is applied to the side wall of a large-scale underground structure, and has a pair of inner and outer reinforcing bars 2 and 3 which are curved in accordance with the shape of the side wall. It is composed of a shearing muscle 4 (see FIGS. 4 and 5) for connecting the two and a reinforcing frame 5.

Each of the rebars 2 and 3 has a large number of vertical rebars 6 and horizontal rebars 7 arranged in a lattice, and the shearing rebar 4 has hook portions 4a formed at both ends thereof. It is fastened and fixed by a number line or the like while being locked to 2 and 3. 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 reinforcing bars 2 and 3 by U-bolts 10 and attached between the reinforcing bars 2 and 3. . In the unit 1 of this embodiment, the reinforcing frames 5 are horizontally mounted over four levels as shown in FIG.
Is attached.

The unit 1 is shown in FIGS.
As shown in FIG. 1, adjacent parts are sequentially erected so that they are partially wrapped and are continuous in the left-right direction and the up-down direction, and constitute the reinforcement of the side walls 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.
Inner reticulated muscle 2 and outer reticulated muscle 3
Each of them is individually formed in a lattice shape having a predetermined size and shape on each of the first and second substrates. As shown in FIGS. 7 to 9, the reinforcing bar bed 21 for forming the inner reticulation bar 2 is configured such that a supporting frame 24 assembled vertically and horizontally on a base frame 23 is supported by columns 25. The support frame 24 is curved in accordance with the curvature of the inner reticulation bar 2 to be formed, and the vertical bars 6 and the horizontal bars 7 are assembled on the support frame 24 in a grid pattern. Note that the horizontal streak 7 is merely arranged on the support frame 24 and naturally curves to a desired curvature along the support frame 24, and therefore, it is not necessary to perform bending in advance. Reference numeral 26 in FIG. 9 denotes a notch groove 2 for positioning each of the horizontal streaks 7.
A ruler plate 6a on which a 6a is formed is a ruler plate for aligning one end of each vertical streak 6 and positioning it.

On the other hand, a reinforcing bar 22 for forming the outer reticulation bar 3 is similar to the reinforcing bar 21 described above.
As shown in FIGS. 10 to 12, the base frame 28 and the support frame 2 that is curved in accordance with the curvature of the outer reticulation 3.
9, a support post 30 and a ruler plate 31, and a plurality of posts 33 for supporting the jack 32 around the rebar arrangement bed 22 (eight in the illustrated example).
A hydraulic supply device 34 is installed and connected to the jacks 32. As shown in FIG. 11, the hydraulic supply source device 34 includes a hydraulic pump 35, supply-side and return-side main conduits 36a and 36b, supply-side and return-side manifolds 37a and 37b, and supply-side and return-side branch conduits. The jacks 32 are synchronized and operated simultaneously.

As described above, each of the reinforcing beds 21 and 22 is provided.
After the inner and outer mesh bars 2 and 3 are individually formed above, the mesh bars 2 and 3 are assembled together by the shear bar 4 and the reinforcing frame 5, and the procedure will be described below. Note that the hooks 4a, 4a are formed on both ends of the shearing muscle 4 in advance. Also, the angle members 8 and the brace members 9 of the reinforcing frame 5 are preferably processed in advance to desired shapes and dimensions.

As shown in FIG. 6 (b), the outer mesh bars 3 are placed on the reinforcing bar 22 as they are, and the inner mesh bars 2 are lifted from the reinforcing bar 21 by the hanging beams 40 driven by the crane. It is transported above the outer reticulum 3.
As shown in FIGS. 13 and 14, the suspension beam 40 includes a curved main frame 41 and a reinforcing frame 42 above the main frame 41, and a suspender 43 for suspending and supporting the inner reticulation 2 under the main frame 41. Is attached,
A jack connecting member 44 that can be fitted to the tip of the jack 32 installed on the post 33 is attached to the lower surface of both ends of the main frame 41.

The suspension beam 40 that has transported the inner reticulation 2
6C is supported by each jack 32 as shown in FIG. 6C and each jack 23 is lowered so that the jack 23 is suspended and supported from the outer mesh reinforcement 3 on the reinforcing bar 22 and the suspension beam 40. The distance from the inner reticulated muscle 2 is slightly smaller than an appropriate distance to be finally set. Then, in this state, the shearing line 4 having the hook portion 4a formed in advance is inserted through both the mesh bars 2 and 3, and the hook portion 4a is appropriately scratched by the mesh bars 2 and 3.

Next, the suspension beams 40 and the inner rebar 2 are slightly lifted by synchronizing the operation of the jacks 32 at the same time, so that the mutual distance between the two rebars 2 and 3 must be finally set. Spread up to an appropriate interval.
As a result, as shown in FIG. 6 (d), both hook portions 4a, 4a of the shearing bar 4 are naturally locked to the two web bars 2, 3. Therefore, the shearing bar 4 is fastened to the mesh bars 2 and 3 by the number line, and the reinforcing frame 5 is attached at a predetermined position between the two bars 2 and 3. The unit 1 is completed by appropriately attaching various types of temporary materials. Fig. 6 for finished product
As shown in (e), it is lifted by the hanging beam 40, transferred to the temporary storage yard, and stored until it is built.

By assembling the unit 1 according to the above procedure using the assembling apparatus described above, the large-scale unit 1 using the large-diameter vertical streaks 6 and the horizontal streaks 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 arranging the bars on the site is greatly reduced, which can sufficiently contribute to labor saving and construction cost reduction.

After the shearing muscles 4 are inserted while the reticulating muscles 2 and 3 are brought close to each other, the inner reticulating muscles 2 are jacked up so that the hook portions 4 at both ends of the shearing muscles 4 are provided.
Since a and 4a are locked to both mesh bars 2 and 3, it is possible to employ as many as one shear bar 4, and therefore, as in the conventional general case shown in FIG. Since it is not necessary to connect the two shear bars e, e with the mechanical joint g or the lap joint h, labor saving and construction cost reduction can be achieved also in this regard. In addition, the shearing muscle 4 may be used as a scaffold, but also in this case, sufficient strength is secured.

When the completed unit 1 is temporarily placed in the temporary storage yard, it is necessary to lift the unit 1 from a horizontal state to a vertical state. At this time, if the unit 1 itself has sufficient rigidity to withstand erecting, the unit 1 may be simply lifted by a crane and erected. However, the unit 1 may have insufficient rigidity to withstand erecting. If
In other words, when there is a concern that the unit 1 itself may be bent and deformed due to its own weight during lifting, FIG.
5 to 17 as shown in FIG. 17, and the unit 1 may be erected using it.

The erecting machine 50 according to the present embodiment comprises a base frame 51 and an upright bed 53 whose base is pivotally supported by a shaft 52 on the base frame 51 and connected to be able to stand up and down. By holding the unit 1 on the upright bed 53 and lifting the upper side thereof with a crane, the unit 1 is erected without applying any load.

If such a erection machine 50 is used,
Even if the unit 1 has insufficient rigidity and cannot withstand erecting itself, it can be erected without any trouble. In other words, assuming that such a erection machine 50 is used, the rigidity of the unit 1 may be low, and therefore the case where the reinforcing frame 5 is unnecessary or provided may be the minimum necessary. 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 unit 1 itself is erected without using the erecting machine 50 as described above, and the reinforcing frame 5 is provided for the purpose of securing rigidity at the time of erecting, the reinforcing frame 5 It is naturally effective to provide the reinforcing frame 5 not in the horizontal direction but in the vertical direction. However, when the reinforcing frame 5 is provided in the vertical direction, the concrete is spread horizontally by the reinforcing frame 5 at the time of placing the concrete. It is feared that the filling property of concrete is impaired as a result. On the other hand, when it is assumed that the erecting machine 50 as described above is used, even if the reinforcing frame 5 is provided, it is not necessary to provide the reinforcing frame 5 in the vertical direction at all. Since it is enough to provide, there is no hindrance that the poured concrete is spread horizontally, and there is no fear that the filling property is impaired.

Although an embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and the form and size of the unit 1 and the detailed configuration of the assembling apparatus are variously designed. Such changes can be made arbitrarily. For example,
Since the unit 1 in the above embodiment is applied to a curved wall, both reticulations 2 and 3 are curved. However, when the unit 1 is applied to a flat wall, the unit is not curved. Needless to say, the unit 1 may be a planar unit. In this case, the support frames 24 and 29 in the rebar beds 21 and 22 and the upright bed 53 in the erection machine 50 may be simply planar.

Although the assembling apparatus of the above embodiment is provided with a erection machine 50 for erection of the unit 1 as a finished product, the erection machine 50 is not necessarily essential, and the unit 1 itself has a sufficient rigidity. In such cases as the above, the erecting machine 50 may be omitted. Alternatively, the support frame 29 of the reinforcing bar 22 for forming the outer reticulation bar 3 can be erected like the upright bed 53, so that the reinforcing bar 22 can also be used as a raising machine. It is. Further, the erecting machine 50 of the above embodiment lifts the upright bed 53 by a crane and raises it.
It is also conceivable to build a drive source such as a hydraulic jack for overturning and mount the drive source on the erecting machine 50.

[0028]

As described above, according to the assembling method of the present invention, after a pair of mesh bars are made to approach each other in a state of approaching each other, a shear bar is inserted through them, and then the mutual spacing is increased to increase the shearing distance. The hooks of the bars are locked to both mesh bars, and then fixed to the shear bars and the mesh bars, so that large-scale wall rebar units can be assembled efficiently and accurately with sufficient management. Not only is it possible, but also the use of as many as one shearing bar has made it possible to significantly reduce labor compared to the conventional case where two shearing bars are connected by a mechanical joint or a lap joint. And the cost can be reduced.

Further, the assembling apparatus of the present invention comprises a reinforcing bar for forming both reinforcing bars, a suspending beam for transferring the other reinforcing bar above one of the reinforcing bars, and a suspending beam. Since the jack is provided with a jack for adjusting the interval between the reticulations, the above method can be easily and reliably performed, and is suitable for use when the method is performed. Further, if a laying machine for erection of the completed wall rebar unit is provided, the rigidity of the wall rebar unit at the time of erecting may be low, so that the reinforcing frame can be eliminated or minimized.

[Brief description of the drawings]

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

FIG. 2 is a plan view of the same unit.

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

FIG. 4 is a plan view showing a state where the unit is built.

FIG. 5 is an elevational sectional view showing a state where the unit is installed.

FIG. 6 is a flowchart showing an operation procedure in an assembling method according to an embodiment of the present invention.

FIG. 7 is a front view showing a reinforcement bed for forming an inner net reinforcement in the assembling apparatus according to one 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 reinforcing bar for forming an outer reticulated bar in the assembling apparatus according to one 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 according to one embodiment of the present invention.

FIG. 14 is a plan view of the same.

FIG. 15 is a side view showing an erecting machine in the assembling apparatus according to one 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 reinforcing bars in a concrete wall.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wall rebar unit 2 Inner net 3 Outer net 4 Shear bar 4a Hook part 5 Reinforcement frame 6 Vertical bar 7 Lateral bar 21,22 Rebar arrangement bed 32 Jack 40 Hanging beam 50 Erecting machine 53 Standing bed.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-48-25332 (JP, A) JP-A-63-56326 (JP, A) JP-A-3-244746 (JP, A) JP-A-5-253 321467 (JP, A) JP-A-7-111738 (JP, A) JP-A-50-161029 (JP, A) JP-A-6-185208 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04C 5/06 E04G 21/12 105

Claims (3)

(57) [Claims] When a wall reinforcing bar unit is constructed in which a pair of vertical reinforcing bars and horizontal reinforcing bars are assembled in a lattice shape and opposed to each other with a space therebetween and connected to each other by shearing bars, the pair of reinforcing bars are used. Are separately formed, and a hook portion that can be locked to each of the reticulations is formed in advance at both ends of the shearing muscle, and one of the reticulations is placed in a substantially horizontal state and the other is reticulated. By suspending and supporting the muscle above it, the mutual distance between the two meshes is kept slightly smaller than the length of the shearing muscle, and in this state, the shearing muscle straddles both meshing muscles. Then, after inserting both ends of each of the reticulated muscles, the hooks at both ends of the shearing muscles are locked to the respective reticulated muscles by lifting the other reticulated muscle upward, and , Attach both ends of the shear muscle to 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 in carrying out the assembling method according to claim 1, wherein the two reinforcing bars are formed so that each of the two reinforcing bars is in a substantially horizontal state. And above one of the reticulated bars formed on one of the reinforcing bars,
A suspending beam for transferring and suspending and supporting the other reticulated bar formed on the other reinforcing bar, and being arranged around the one reinforcing bar, supporting the suspending beam from below and operating synchronously And a plurality of jacks for adjusting the distance between the two reinforcing bars by raising and lowering the suspension beam. 3. The apparatus according to claim 2, further comprising an upright bed that rises from a substantially horizontal state to a substantially vertical state, wherein the wall reinforcement unit is placed on the upright bed. An assembling apparatus for a wall reinforcing bar unit, further comprising: a erection machine that raises the wall reinforcing unit in a substantially vertical state by raising the standing bed while maintaining the state.