JP2858205B2 - Reinforcing bar mounting method and rebar mounting device used for the same - 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 for building a reinforcing bar suitable for use when constructing a deep foundation pile using cast-in-place concrete, and a reinforcing bar building apparatus used therefor.

[0002]

2. Description of the Related Art Conventionally, when a reinforcing bar for reinforcing a concrete pile is built in a vertical hole, a reinforcing member is carried into the vertical hole, and an operator assembles the reinforcing members one by one in the vertical hole. There is a way. However, this method has a poor working environment because it requires work in a deep and narrow mine.In addition, since it is necessary to supply reinforced material by a crane or the like into a vertical pit where workers are located, there is also a danger of falling suspended loads. There is a safety issue. Therefore, in the vicinity of a factory or site, a reinforcing rod cage is manufactured in advance, transported to the site, and the reinforcing rod cage is suspended by a crane or the like.
It is also known to build it in a vertical hole. Such a rebar cage system has high safety because the construction period is short and no manual work is required in the mine.

[0003]

However, when such a reinforcing cage is applied to a large-diameter concrete pile having a depth such as a deep foundation pile, the reinforcing cage in a pre-assembled state is required. It becomes very large. Therefore, when it is desired to construct a large-diameter deep foundation pile, particularly when the pile is used for a pier in a mountainous area, it is extremely difficult to transport the assembled reinforcing cage to the site. Further, even if the transportation is possible, the transportation of the assembled large reinforced cage requires a large-sized transportation vehicle, so that the transportation cost becomes excessive. In addition, a large crane that matches the weight of the pre-assembled reinforced cage is required when building in a vertical hole.However, at such mountainous sites, construction yards are extremely limited, And its installation may not be possible. Therefore, such reinforced cages are rarely applied to the construction of large-diameter deep foundation piles in a form that is limited by economy and construction restrictions. In view of the above circumstances, the present invention has been made in consideration of the above circumstances, and does not require a large crane or a transport vehicle. Is provided.

[0004]

In other words, the present invention relates to a method for controlling the ground (2)
In the vertical hole (3) dug from a), several main reinforcements (3
7a) and a reinforcing bar assembly (37) for reinforcing concrete with a plurality of distributing bars (37b), the main bar holding means (9) is inserted into the vertical hole (3) from outside of the vertical hole.
A plurality of main bars (37a) are vertically installed in the main bar holding means (9) in a form corresponding to each bar arrangement position of the plurality of main bars (37a). And holding each of the plurality of force-feeding muscles (37b) near the mouth (3a) of the vertical hole (3) with the main muscle holding means (9).
The main muscle holding means (9) is connected to the main muscles (37a) so as to intersect with the plurality of main muscles (37a) held by the main muscles (37a).
From the outside of the vertical hole through the lifting device to the inside of the vertical hole.
By moving the plurality of main reinforcing bars (37a) to which the plurality of force bars (37b) are connected as the reinforcing bar assemblies (37), the reinforcing bar assemblies are connected to the main reinforcing bars.
It is configured so as to be lowered into the vertical hole (3) while being mounted and held on the holding means . Further, the present invention has a frame (6), a main bar arrangement means (7) is provided on the frame (6), and the main bar arrangement means (7) is provided with a plurality of main reinforcement arrangement portions (71). The main bar (37a) is provided so as to be vertically movable with respect to the main bar arranging portion (71), and the main bar holding means (9) is vertically movable below the main bar arranging means (7). The frame (6)
The main bar holding means (9) is provided with a vertically movable device (10) capable of vertically moving and driving the main bar holding means (9), and the main bar arranging portion (71) of the main bar arranging means (7) and the main bar holding means (9).
A main reinforcing bar (37a) can be set between the reinforcing bars, thereby constituting a reinforcing bar setting device (5). Further, in the present invention, the main bar arrangement portion (71) is formed and formed in a shape corresponding to the bar arrangement pitch of the main bar (37a) to be erected. In the present invention, the main bar arrangement means (7) is provided with a main bar fixing device (72), and the main bar (37a) is provided in each of the plurality of main bar arrangement portions (71) so as to be freely inserted in a horizontal direction, Be composed. Further, in the present invention, a reinforcing bar locating tool (8) is arranged between the main reinforcing bar arrangement means (7) and the main reinforcing bar holding means (9) at a position aligned with the main reinforcing bar arrangement means (7). It is configured by being arranged in the vertical direction in the form. In the present invention, the distribution muscle holding means (17) is movably provided from the inside to the outside of the distribution muscle building position, and the distribution muscle holding means (17) includes a plurality of distribution muscles. A plurality of streak holders (191) are provided at predetermined intervals in the vertical direction.
It should be noted that the numbers and the like in parentheses are for convenience and indicate the corresponding elements in the drawings, and therefore, the present description is not limited to the descriptions on the drawings. The same applies to the following operation columns.

[0005]

With the above construction, the present invention provides a plurality of main bars (37a) held in a predetermined bar arrangement state by the main bar holding means (9) near the mouth (3a) of the vertical hole (3). The rebar is assembled by connecting the rebars (37b), and the main rebar holding means (9) is moved downward, so that the rebar assembly (3) is assembled.
It works so as to perform the setting work of 7). Further, according to the present invention, the main muscle (37a) set between the main muscle arranging portion (71) of the main muscle arrangement means (7) and the main muscle holding means (9) is connected to the main muscle holding means via the elevating device (10). It moves up and down by the up and down movement of (9), and at this time, the main bar arrangement section (71)
Acts to move up and down relative to. Further, in the present invention, the main muscle arrangement section (7) of the main muscle arrangement means (7).
A plurality of main bars (37a) between 1) and the main bar holding means (9);
Acts so as to be set in a form corresponding to the bar arrangement pitch of the main bar (37a). In the present invention, when the main bar (37a) is set so as to be inserted into the main bar arranging portion (71), the main bar fixing device (72) moves the set main bar (37a) from the main bar arranging portion (71). Acts to prevent horizontal disengagement. In the present invention,
When the main-bar holding means (9) is aligned with the reinforcing-bar locating tool (8), the main-bar holding means (9) acts so as to be positioned at an alignment position with the main-bar reinforcing means (7). Further, in the present invention, a plurality of main muscles (37a) set between the main muscle arranging portion (71) of the main muscle arrangement means (7) and the main muscle holding means (9) extend from the inner side to the outer side. The distribution force holding portions (191) of the holding means (17) function so as to be protrudingly arranged.

[0006]

1 is a partially cutaway perspective view showing a state of a pile construction site in which a reinforcing bar is erected using an embodiment of a reinforcing bar embedding device according to the present invention. FIG. 2 is a perspective view showing a pile shown in FIG. FIG. 3 is an enlarged view showing the vicinity of a wellhead at a construction site, FIG. 3 is a plan view showing a part of a gauge disk of the reinforcing bar erection device shown in FIG. 1, and FIG.
FIG. 5 is an enlarged view of a portion of the gauge disk shown in FIG. 3 as viewed in the direction of arrow IV. FIG. 5 is a plan view showing a slide guide portion of the reinforcing bar erection device shown in FIG. FIG. 7 is a cross-sectional side view of a portion of the frame as viewed in the direction of arrow VI. FIG. 7 is a view showing a state in which main reinforcing bars are attached to the reinforcing bar building apparatus shown in FIG. 1 using a reinforcing bar hanging jig, and FIGS. 2) is a diagram showing a manner in which the distribution bars are welded to the main bars at the pile construction site shown in FIG. 1.

[0007] At the site 1 where the pile is being constructed, as shown in FIG.
The hole 3 is formed into a columnar shape having a predetermined diameter D1 in a shape dug into the ground 2 from below, and a mortar 36 for temporary support is provided on a side wall 3c of the vertical hole 3 in a wellhead 3 serving as a mouth portion of the vertical hole 3.
a and is connected to the hole bottom 3b by being sprayed in an annular shape. In addition, on the site 1, a reinforcing bar building device 5 is provided.
It is provided for the above-mentioned pile 30, that is, a reinforcing bar for concrete reinforcement is built in the vertical hole 3 as a reinforcing bar cage 37 which is a reinforcing bar assembly. It is formed so as to form. Reinforcing basket 3
7 are vertical holes 3 each extending vertically.
And a plurality of force distribution bars 37b welded to the plurality of main bars 37a so that each of the main bars 37a extends along the side walls 3c so as to intersect with the plurality of main bars 37a. It is now composed of reinforced cage 37
Is being built into the vertical hole 3 while connecting the main reinforcing bar 37a and the force distribution bar 37b via the reinforcing bar mounting device 5. As shown in the right part of FIG. 2, each of the force distribution bars 37b is formed into a semicircular shape to be carried into the site 1, and two of the semicircular force distribution bars 37b are formed. 1
One pair of force distribution bars 37b is formed by lap welding in a pair in a circular shape.

As shown in FIG. 1, the reinforcing bar embedding device 5 has a frame 6. The frame 6 is supported upright on the ground 2 a by the legs 61 a of the four columns 61. I have. At the upper end of the frame 6, a gauge disk 7 formed in a hollow disk shape is connected to four pillars 61 via four beams 62, and is provided in the middle part of the four pillars. is provided as a main reinforcement reinforcement means, the gauge disk 7, as shown in FIG. 3, a plurality of main reinforcement placement portion 71, are formed at predetermined pitch P1 along the periphery of the gauge disk 7 I have. The plurality of main bar arrangement portions 71 formed on the gauge disk 7 are provided with main bars 37a to be built.
In the example, the formation pitch of the main reinforcement arrangement portion 71 is formed to be about 5 cm, so that the reinforcement arrangement pitch of the main reinforcement 37a is set to 10, 15, 20 cm or the like. The pitch can be selected from a pitch of an integral multiple of 5.

As shown in FIG. 4, a main bar 37a having a diameter corresponding to the bar main bar diameter of the pile 30 can be accommodated in each main bar arranging portion 71 of the gauge disk 7, one by one. The main bar arranging portion 71 can hold the main bar 37a so as to be movable in a vertical direction which is a direction intersecting with the plane of FIG. Further, the gauge disk 7 is provided with stoppers 72 made of a leaf spring or the like as main bar fixing members in the respective main bar arranging portions 71 by the number of the main bar arranging portions 71 formed. Is fixed to the gauge disk 7. Each of the stoppers 72 can freely bend only toward the inner side, that is, toward the main bar placement portion 71, as shown by the one-dot chain line in FIG. The main bar 37a can be freely inserted in each of the plurality of main bar arranging portions 71 in the horizontal direction (that is, can be fitted in the direction of arrow A in FIG. 4).

At the lower part of the frame 6, as shown in FIG. 1, a slide guide 8 formed in an annular shape is connected to and supported by the four columns 61 via four beams 63. As shown in FIG. 2, the slide guide 8 is disposed on the wellhead 3a slightly above the ground 2a, that is, a height position near the foot of the worker 39. It is shaped to be placed in. Also,
The slide guide 8 is provided between the gauge disc 7 and a lower frame 9 to be described later, and is arranged vertically with the gauge disc 7 so as to be arranged at a position aligned with the gauge disc 7. As shown in FIG. 5, a reinforcing bar insertion space 8s
The rebar cage 37 is formed in a circular shape with a diameter D2 slightly larger than the outer diameter. That is, the reinforcing-bar insertion space 8s of the slide guide 8 allows the assembled reinforcing-bar cage 37 to pass in the up-down direction shown in a direction intersecting the paper surface of FIG.

As shown in FIG. 1 or FIG. 2, in the embodiment, three electric chain blocks 10 are provided on the upper portion of the frame 6 so as to hang from the bottom of the gauge disk 7. Below the three chain blocks 10 (that is, below the gauge discs 7), the lower frame 9 serving as the main reinforcement holding means of the reinforcing bar embedding device 5 is provided in a mounted state. It is suspended from the three chain blocks 10 by a wire 11 and is provided so as to be movable up and down in the vertical hole 3. That is, the chain block 10 is attached to the lower frame 9
Is provided on the frame 6 as a vertically movable device which can be moved and moved up and down, and the chain block 10 is provided in a normal state (that is, while the reinforcing bar is being built).
By this operation, the lower frame 9 can only move downward from the upper side to the lower side.

The lower frame 9 is, as shown in FIG.
The mortar 36 is formed in an annular shape having a diameter slightly smaller than the inner diameter of the vertical hole 3 in a state where the mortar 36 is sprayed, and a lower end of the lower frame 9 has a support portion 9a as shown in FIG.
Are provided so as to face an upper flange portion 9b formed on the upper end side of the lower frame 9. As described above, the plurality of main bars 37a arranged along the side wall 3c of the vertical hole 3 are mounted on the lower frame 9 on the support portion 9a through the insertion holes 9s formed in the upper flange portion 9b. Therefore, the reinforcing bar cage 37 composed of the plurality of force distribution bars 37b connected to the plurality of main bars 37a is connected to the lower frame 9
It is mounted and supported. As shown in FIG. 6, a support surface 9a is formed on the bottom surface side of the support portion 9a of the lower frame 9 so as to be supported by the hole bottom 3b of the vertical hole 3.

As shown in FIG. 1, several hook holders 12 are mounted on the lower frame 9, and each hook holder 12 has a hook engaging member as shown in FIG. The protrusions 12a are provided inward in the radial direction of the lower frame 9 so as to protrude downward.
The hook holder 12 has a hook arrangement groove 12b formed between a portion connected to the lower frame 9 and the hook engaging projection 12a. A hanging ring 13 connected to the lower end of the wire 11 is engaged and held by being hooked on the hook engaging projection 12a from the side. Accordingly, as described above, the reinforcing bar cage 37 supported by the lower frame
Are suspended from and supported by the three chain blocks 10 via wires 11 which are engaged and held by hook holders 12, whereby the reinforcing bar cage 37 is attached to the frame 6 on which the chain blocks 10 are mounted. The shape is supported by. As shown in FIG. 6, a level adjusting jack 15 is provided between the wire 11 and the suspension ring 13 so as to adjust the length of the wire 11 in the directions of arrows B and C in FIG. The equilibrium state of the lower frame 9, that is, the equilibrium state of the rebar cage 37 mounted and supported on the lower frame 9 can be adjusted and held through the level adjusting jack 15.

Further, the frame 6 of the reinforcing-bar building device 5
As shown in FIG. 2, four hydraulic jacks 16 are provided in a form mounted on the gauge disc 7.
Each hydraulic jack 16 has a distribution line receiving jig 17 as a distribution line holding means suspended from a chain 20 . Each distributing muscle receiving jig 17 is movable via a hydraulic jack 16 by a predetermined length in the vertical direction shown by arrows D and E in FIG. Reference numeral 17 denotes a position at which the hydraulic jack 16 on which the power distribution muscle receiving jig 17 is suspended is slightly radiated from a position at which the power distribution muscle receiving jig 17 is to be arranged when the power distribution muscle 37b is arranged. In a form shifted toward the inside in the direction, the force distribution bar 37b is movable from the inside to the outside at the position where the power distribution bar 37b is to be built. 8 is provided in the power distribution muscle receiving jig 17.
As shown in (a) to (c), a plurality of hooks 191 serving as a plurality of force distribution muscle holding portions are arranged at predetermined intervals in the vertical direction at a pitch corresponding to the muscle arrangement pitch of the force distribution muscles 37b. provided, a plurality of hanger 191 arranged in the vertical direction of the distribution force muscle receiving jig 17, in a form linked via a guide 1 9, by the operation of the guide 1 9, 8 arrows F, G
In the radially inward and outward directions shown in FIG. The distributing muscle receiving jig 17 is configured such that one distributing muscle 37b can be mounted and held on each of the plurality of hooks 191.

As shown in FIG. 1, a crane truck 40 is disposed at the site 1 so as to be positioned near the vertical hole 40. Is attached and suspended. As shown in FIG. 7, the main bar suspension 21 has three sheath tubes 22 in the embodiment, and each sheath tube 2
2 has a main bar insertion space 22s, which is a reinforcing bar insertion space.
However, the main bar 37a is formed so as to be freely movable along the material axis direction of the main bar 37a (that is, up and down). The three sheath tubes 22 are connected via a connecting member 23 so as to be arranged in a horizontal direction at a pitch corresponding to the bar arrangement pitch of the main bar 37a. A pulling wire 25 attached to the connecting member 23,
It is suspended by the hook block 41 via a bundling jig 26. Accordingly, the connecting member 23, the pulling wire 25, and the bundling jig 26 constitute suspension engaging means provided on the three sheath tubes 22, and the suspension engaging means The main bar suspension 21 is suspended from the hook block 41.

As shown in FIG. 7, a clamp 27, which is a rebar clamp capable of gripping the main bar 37a, is attached to the main bar suspension 21 below the three sheath tubes 22 and one of them. Three pairs are provided on the suspension engaging means formed by the connecting member 23, the pulling wire 25, and the bundling jig 26 so as to form a pair, and each clamp 27 has a connecting wire 29 having a length L1. Are connected to and connected to the respective sheath tubes 22 in a form suspended from the connection member 23 via the connection member. That is, in a state where the main bar suspension tool 21 is suspended by the hook block 41 of the crane truck 40 by the suspension engagement means, each sheath tube 22 and each clamp 27 are
Due to the weight of the clamp 27, a predetermined distance L1 can be held in the vertical direction. At this time, the three sheath tubes 22 are arranged so as to be interposed within the traction force of the crane. The sheath tube 22 and the three clamps 27 are arranged so as to be arranged in the vertical direction, whereby the main bar suspension 21 holds the main bar 37a with the material axis direction of the main bar 37a directed vertically as shown in FIG. It is possible to do.

Since the site 1 has the above configuration, when constructing the pile 30 at the site 1, the vertical holes 3
Is dug down by a predetermined depth so as to form a predetermined diameter D1 from a predetermined position on the ground 2a, and a mortar 36 is sprayed to a predetermined thickness on the side wall 3c. An operation of building the reinforcing bar cage 37 into the vertical hole 3 with the plurality of main bars 37a and the plurality of distribution bars 37b as a reinforcing bar assembly is performed. Therefore, first, the surrounding of the wellhead 3a of the vertical hole 3 where the reinforcing bar 5 is to be built,
As shown in FIG. 1, the reinforcing-bar-building device 5 is installed so that the lower frame 9 can descend in the vertical hole 3. On this occasion,
The reinforcing bar setting device 5 is installed such that the center CL1 of the frame 6 matches the center CL1 of the vertical hole 3.

Therefore, first, the main bars 37 having a predetermined number of bars are arranged.
a is vertically held by the lower frame 9 in a form corresponding to the respective bar arrangement positions. Therefore, first, the main muscle insertion space 22 of each of the three sheath tubes 22 of the main muscle suspender 21.
In FIG. 1, the main bar 37 in a state of being laid down as shown in the right back of FIG.
a, and the clamp 27 is attached to a predetermined position of the main bar 37a (that is, a position that becomes lower when the main bar 37a is vertically extended). Thus, three clamps 2
After the three main bars 37a are gripped in the shape 7 and the binding jig 26 is engaged with the hook block 41 of the crane truck 40, the hook block 41 is moved upward by the crane operation. Then, the main bar suspension 21
Each of the clamps 27 holding the main bar 37a is connected to the connecting member 23 provided on the three sheath tubes 23,
7. The crane 4 is used as a hanging engagement means with the binding jig 26 suspended.
It hangs at 0 and becomes vertical. Thus, the main line 37
When a is raised vertically from a laid state, the three main bars 37
a rises in a state where horizontal movement is restrained by the three sheath tubes 22, and a vertical main bar 37a
The main reinforcement is suspended via three clamps 27 in a form held by the horizontal restraining force of the three sheath tubes 22 and the own weight of the three main reinforcements 37a so that the axial direction of the material is oriented in the vertical direction. It is in the form suspended by the tool 21. Thereby, as shown in FIG. 1, the three main bars 37a
The main bar suspension 21 is stably provided without bending the material axis of 7a.
And is suspended from the hook block 41 via.

In this state, the hook block 41 is further appropriately moved through a crane operation, and the three main bars 37 are moved.
a is set between the gauge disk 7 and the lower frame 9. First, the lower end of each main bar 37a is inserted into the lower frame 9 through the insertion hole 9s and is mounted on the support 9a. It enters the main bar arrangement portion 71 at the position and arranges it. At this time, since the stopper 72 is provided in each main bar arrangement portion 71, the stopper 72 is pushed by the main bar 37a in the direction of arrow A in FIG.
a is made to enter the main bar arrangement portion 71 from the horizontal direction. Then, the stopper 72 restores to the plate 73 side by the spring force held by the stopper 72 as shown by the solid line in FIG. That is, the main bar 37a is prevented from coming off from the main bar arranging portion 71 outward in the radial direction. As a result, the main bar 37a is held in the main bar arranging portion 71 so as to be vertically movable with respect to the main bar arranging portion 71. The gauge disk 7 has a predetermined pitch P1.
Since a plurality of main bar arrangement portions 71 are formed (at a pitch of 5 cm in the embodiment), only necessary ones of the plurality of main bar arrangement portions 71 can be selectively used. That is, the main bar placement unit 71 at a position where bar arrangement is unnecessary is left without being used.

In this way, three main bars 32a are successively mounted on the support portion 9a of the lower frame 9 and the main bar suspension 21 is lowered by crane operation while being placed on the main bar placement portion 71 of the gauge disk 7. , The three main bars 37a released from the suspended support state by the main bar suspenders 21
Is vertically held by the lower frame 7 due to its own weight. Then, the three clamps 27 of the main bar suspension 21 are sequentially removed from the main bar 37a. Further, the hook block 41 is raised by the crane operation. Then, the main muscle suspender 21 in a state where the clamp 27 is removed from the main muscle 37a is in a form in which the three sheath tubes 22 move relatively upward with respect to the main muscle 37a via the respective main muscle insertion spaces 22s. It is detached from the main bar 37a so as to escape upward. Therefore, if the main bar suspension 21 is used, the main bar 37a can be easily made vertical only by attaching the clamp 27 to the main bar 37a in a laid state and operating the crane. Also, by simply removing the clamp 27 from the vertical main bar 37a, the main bar suspension 21 can be easily removed from the main bar 37a.
, And these operations do not involve complicated work at a high place or work.

By repeating the operation of setting the main reinforcing bars 37a between the gauge disk 7 and the lower frame 9 in this manner, the main reinforcing bars 37a of a predetermined number are arranged in a form corresponding to each of the reinforcing bar positions. When vertically mounted and held on the lower frame 9, the level of the lower frame 9 is adjusted by driving the level adjustment jack 15 to adjust the length of each wire 11. Thus, a predetermined number of main bars 37a mounted and held on the lower frame 9 are provided.
Are balanced so that each of them has a shape in which the axial direction of the material is oriented vertically. Then, next, the predetermined number of main bars 3
The work of connecting the force distribution muscle 37b to 7a is performed.

At the time of connecting the distribution bars 37b to the main reinforcement 37a, the distribution rod receiving jig 17 is used.
The main muscle 37b is connected to the distribution muscle 37b located at the lowermost part of
when connecting to a sets together lower end of the jig 1 7 receives Hairyoku muscle at the lower end of the main muscle 37a. When connecting the force-supplying muscle 37b at a position higher than this to the main muscle 37a, as shown in FIG. The jig 17 is positioned and set. The positioning of the distribution muscle receiving jig 17 is performed by setting the hook 191 at the lowermost end to be engaged with the distribution muscle 37b already connected to the main reinforcement 37a and holding the jig 17 in four positions. The operation is performed by operating the hydraulic jacks 16 respectively.

Each of the four force receiving muscle receiving jigs 17 positioned in this manner is arranged inside a plurality of annular main muscles 37a held by the lower frame 9 to form a ring. I have. Therefore, next, as shown in FIG. 8 (b), the jig 1 7 receives distribution force muscle causes slightly moved radially outward, via a guide 19 more hanger 1
9 is projected in the direction of arrow G in FIG.
The plurality of hooks 191 are arranged so as to protrude outside a. At this time, the lowermost hook 191 of the plurality of hooks 191 of the power distribution bar receiving jig 17 is hooked on the power distribution bar 37b already connected to the main bar 37a and located at the uppermost position. By doing so, the distribution muscle receiving jig 17 is accurately held inside the main muscle 37a. At this time, since the hanging tool 191 is provided on the force-receiving muscle receiving jig 17 in a form corresponding to the muscle-arrangement pitch of the force-distributing muscle 37b, a plurality of positions where the force-irradiating muscle 37b is to be arranged are determined. It is immediately detected by the arrangement position of the hanging tool 191.

Then, the four force receiving jigs 17 are connected to each other in FIG.
As shown in FIG. 2, when each hook 191 is set so as to protrude outside the main bar 37a, the distribution bar 37b having a semicircular shape as shown in the right part of FIG.
Then, as shown in FIG. 8 (b), it is engaged and held in such a manner that it is hooked on each hook 191 of the distribution force receiving jig 17 . Then, the main muscle 37a is attached to the main muscle 37a by wrapping the two ends of the two semicircular force muscles 37b so that each of the muscles 37b becomes circumferential. 37
Each is welded and connected so as to intersect with a.
Then, the connecting operation of the force distribution bars 37b to the plurality of main reinforcements 37a is repeated, so that the rebar cage 1 as the rebar assembly is
0 can be formed, and the rebar assembling work for this
As shown in FIG. 2, it can be carried out outside the mine on the ground 2 a near the wellhead 3 a.

In this manner, the power distribution bars 37 engaged with the hooks 191 of all the steps of the power distribution line receiving jig 18 set in advance.
b is welded and connected to the main bar 37a, and after completing one cycle of the connecting work of the distribution bars, as shown in FIG. 8 (c),
The distribution bar receiving jig 18 is separated from the main bar 37a (that is, the reinforcing bar cage 37 being assembled). For this purpose, the hydraulic jacks 16 are released, and the respective force-distributing-bar receiving jigs 18 are slightly moved downward. Then, the distributing muscle receiving jig 18 is immediately suspended by the hydraulic jack 16 via the chain 20, whereby the distributing muscle receiving jig 18 returns radially inward from the main reinforcement 37 a. As shown in FIG. 8C, the jig 18 is restored and arranged inside the main bar 37a.

In this manner, the main muscles 37b are connected to the main muscles 37b by the hooks 191 of all the stages of the jigs 18 for receiving the main muscles.
When the work for connecting to the a is performed, the rebar cage assembling work corresponding to the length of the distributing muscle receiving jig 18 has progressed. Thus, while performing the work of assembling the reinforcing bar cage 37 by using the distributing bar receiving jig 18 in this manner, each chain block 10 is driven in a predetermined cycle, and each wire 1
The lower frame 9 is gradually lowered into the vertical hole 3 in such a manner that 1 is extended. Then, the lower frame 9
A predetermined number of the main bars 37a set between the lower frame 9 and the main bar arranging portion 71 of the gauge disc 7 while being mounted and held on the main frame 37a as described above.
Together with the force distribution bars 37b connected to the vertical bar 3 as an assembled part of the reinforcing bar cage 37. Therefore, when the operator 39 drives and operates each chain block 10 on the ground 2a near the wellhead 3a, the main bars 37a and the force distribution bars 37b are laid in the vertical holes 3 in a state where the reinforcing bars 37 are formed. You can do it. In addition, in this way, steel cage 3
When the assembled portion 7 is lowered into the vertical hole 3, the main bars 37 a forming the reinforcing bar cage 37 move downward relative to the main bar placement portions 71 of the gauge disk 7. At this time, the stopper 72 is provided in each of the main bar arrangement portions 71, so that each of the main bars 37a does not come off radially outward from the main bar arrangement portion 71, and is smoothly attached to the gauge disk 7. On the other hand, it can move downward.

By the way, as described above, the reinforcing bar cage 37 of the assembled portion which is lowered into the vertical hole 3 is provided with the wellhead 3a located below the position where the force distribution bar 37b is connected to the main bar 37a.
In the vicinity, it descends while passing through the reinforcing bar insertion space 8s of the slide guide 8. At this time, the slide guide 8 is provided at a position aligned with the gauge disk 7, and the center CL 1 of the frame 6 provided with the gauge disk 7 and the slide guide 8 is located at the center CT of the vertical hole 3.
It has a shape that matches 1. Then, since the slide guide 8 is formed in an annular shape in which the inner diameter, that is, the diameter D2 of the reinforcing bar insertion space 8s is slightly larger than the outer diameter of the reinforcing bar cage 37, the slide guide 8 passes through the reinforcing bar insertion space 8s. The reinforced basket 37 of the finished portion is guided into the inner surface of the slide guide 8 and can descend into the longitudinal hole 3 with the center of the member of the rebar cage 37 always coincident with the center CT1 of the longitudinal hole 3. .

In this manner, as described above, the main reinforcing bars 37a having the predetermined number of bars are arranged between the lower frame 9 and the main bar arranging portion 71 of the gauge disk 7 in such a manner as to correspond to the respective bar arranging positions. The lower frame 9 is driven down by the drive operation of the chain block 10 by the length of the rebar cage 37 by assembling the rebar cage 37 while connecting the force distribution bars 37b to the predetermined number of main rebars 37a. By repeating the work of repeating the work in a predetermined cycle, the main bar 37a and the force distribution bar 37b are
These can be built in the state of the reinforcing bar cage 37 connected thereto. Then, the rebar cage assembling and erection work can be performed on the ground 2a near the wellhead 3a, and the worker 39 descends in the pit of the vertical hole 3 for rebar assembly, or temporarily sets a scaffold on the vertical hole 3. No need to work at height. In addition, when the length of the pile 30 to be formed and constructed, that is, the depth of the vertical hole 3 is larger than the length of one main bar 37a, the main bars 37a are sequentially wrapped in the vertical direction while being sequentially added,
Since the main bar 37a can be set to a predetermined length, the vertical hole 3
In the state where the reinforcing bar embedding device 5 is installed in
Reinforcing cages 37 for the entire length can be built in, and there is no need to change the setup.

Further, in this manner, when the reinforcing bar cage 37 of a predetermined length is erected and installed in the vertical hole 37 in an assembled state, the lower frame 9 in which the vertical hole 3 is lowered for mounting the reinforcing bar. Reaches the hole bottom 3b. by this,
The reinforcing rod cage 37 is supported by the hole bottom 3b via the support portion 9a of the lower frame 9. Then, the reinforcing cage 3 on the lower frame 9 is suspended from the lower frame 9.
The wire 11 supporting the wire 7 is held by the hook holder 12 so that the hanging ring 13 is hooked on the hook engaging projection 12a projecting downward and is arranged in the hook arrangement groove 12b. Therefore, when the lower frame 9 reaches the hole bottom 3b, the suspension ring 13
b, the hook engaging protrusion 12a
Get out of. Thereby, the engagement state between the lower frame 9 (ie, the reinforcing bar cage 37 supported by the lower frame 9) and the wire 11 (ie, the chain block 10 to which the wire 11 is connected) is released. That is, the lower frame 9 is left behind on the hole bottom 3b as a consumable part in the reinforcing bar setting device 5, and the components other than the lower frame 9 are reinforced cages 37.
It is separated and collected, and is diverted to the construction position of another pile 30. However, the worker does not need to enter the vertical hole 30 for the part collection work, and by operating the chain block 10,
You can do this. That is, safety is high.

Therefore, when the wire 11 is separated from the lower frame 9 via the suspension ring 13 as described above, the wire 11 is pulled up by the driving operation of each chain block 10, and the reinforcing bar erection device 5 is removed from the vertical hole 3. if,
Immediately, an operation of placing concrete in the vertical hole 3 can be performed. In addition, the removed reinforcing-bar building device can be diverted to the vertical hole 3 in which the reinforcing bar cage 37 has not yet been built, and a new reinforcing-bar building operation can be started. Therefore, pile construction can be performed with good construction efficiency. The crane truck 40 is used for the transfer of the reinforcing bar embedding device 5 and the setting of the main reinforcing bar 37a to the reinforcing bar embedding device 5 described above, but the reinforcing bar embedding device 5 holds the reinforcing bar cage 37. The crane truck 40 is installed or moved in a state where it is not mounted, and the main bars 37a are set three by three. The reinforcing bar cage 37 can be assembled near the wellhead 3a. Before the assembling, the main bar 37a and the semicircular force bar 37b can be stored in an overlaid state. Therefore,
The installation of such a crane truck 40, the main reinforcement 37a, and the distribution muscle 3
Extensive space is not occupied for storage of rebar such as 7b.

In the above-described embodiment, the cylindrical reinforcing bar 37 is formed in the cylindrical vertical hole 3 along the side wall 3c.
Has been described, but the shapes of the vertical hole 3 and the reinforcing bar cage 37 are not limited thereto. Therefore, a reinforcing bar assembly such as the reinforcing bar cage 37 may be built in the middle of the vertical hole 3. Further, a reinforcing bar assembly having a plate-like overall shape may be built in a wall-shaped vertical hole. Also,
In the embodiment, the example has been described in which the lower frame 9 of the reinforcing bar erection device 5 is driven to move up and down by the electric chain block 10. However, if the lower frame 9 can be lowered in the vertical hole 3, May be vertically moved and positioned by the lifting device.

[0032]

As described above, according to the present invention, a plurality of main bars 37a are formed in the vertical hole 3 dug from the ground 2a.
When a reinforcing bar assembly such as a reinforcing bar cage 37 for reinforcing concrete with a plurality of distributing bars 37b is built,
The main-bar holding means such as the lower frame 9 is placed outside the vertical hole.
From the vertical hole by a lifting device such as a chain block 10
In descending freely installed, a plurality of main reinforcements 37a, is held vertically to the main reinforcement holding means in a form to correspond to reinforcement position of each of the plurality of main reinforcements 37a, near the mouth of the wellhead 3a etc. of the vertical hole 3 While connecting each of the plurality of distribution muscles 37b to the main muscle 37a so as to intersect with the plurality of main muscles 37a held by the main muscle holding means, the main muscle holding means is connected to the vertical
By moving the plurality of main reinforcing bars 37a to which the plurality of force distribution bars 37b are connected, by moving the main reinforcing bars 37b downward from the outside of the hole in the vertical hole via the lifting device ,
A form in which the reinforcing bar assembly is mounted and held on the main reinforcing bar holding means.
In, since it is configured as go down into the vertical hole 3, in the vicinity of the mouth of the vertical hole 3, connecting a plurality of distribution power muscle 37b into a plurality of main reinforcements 37a held in a predetermined reinforcement conditions by the main reinforcement holding means The rebar assembly can be performed by moving the main rebar holding means down in the vertical hole via the elevating device to perform the rebar assembly operation of the assembled rebar assembly. I can do it. Therefore, since the rebar assembling work and the rebar building work can be performed outside the pit near the mouth of the vertical hole 3, the pit work can be avoided,
It is safe. Also, since the main reinforcement 37a and the distribution muscle 37b are assembled near the mouth of the vertical hole 37, before assembly, the main reinforcement 37a and the distribution muscle 37b are carried to the site in a state where the respective main reinforcement 37a and the distribution muscle 37b are overlapped, and stored. Can be kept. Therefore, no space is required. In addition, the rebar assembly can be built in the vertical hole 3 by moving the main reinforcement holding means down in the vertical hole via the elevating device while assembling the reinforcing bar assembly while being mounted and held on the main reinforcement holding means. There is no work to lift the assembled one. As a result, a large-sized crane and a truck are not required, and economic construction is possible. As described above, the present invention is less subject to construction restrictions, and is particularly effective when a rebar assembly for constructing a large-diameter deep foundation pile for a bridge pier is installed in a shaft in mountainous areas.

Further, according to the present invention, the frame 6 is provided with main bar arrangement means such as a gauge disk 7 on the frame 6, and the main bar arrangement means is provided with a plurality of main bar arrangement portions 71.
Are provided so as to be capable of vertically holding the main bar 37a with respect to the main bar arranging portion 71, respectively. The main bar holding means such as the lower frame 9 below the main bar arranging unit is vertically movable. A chain block 1 provided on the frame 6 and capable of moving and positioning the main bar holding means up and down.
Since the main reinforcing bar 37a can be set between the main bar arranging portion 71 of the main bar arranging device and the main bar holding device, the reinforcing bar laying device 5 is configured. The main bar 37a set between the main bar arranging unit 71 of the main bar arranging unit and the main bar holding unit is moved up and down by the vertical movement of the main bar holding unit via the elevating device. Can move up and down relatively. Therefore, the reinforcing bar embedding device 5 is placed on the vertical hole 3 dug down from the ground, and the main reinforcement holding means is provided with the vertical hole 3.
It is installed so as to be able to descend inside, and if the main bars 37a of a predetermined number of bars are set between the main bar arranging portion of the main bar arranging unit and the main bar holding unit, the main bar 37a is connected to the main bar 37b. By simply moving the main bar holding means downward, the main bar 37a to which the force distribution bar 37b is connected can be lowered into the vertical hole 3. At this time, the work of connecting the force bars 37b to the main bars 37a can be performed in a state where the main bars 37a are set between the main bar arranging portion 71 of the main bar arranging means and the main bar holding means. Since the streak means can be moved up and down, the work of connecting the distribution muscle 37b to the main streaks 37a can be performed at a height suitable for the work, that is, on the ground near the mouth of the wellhead 3a or the like, that is, outside the pit. . In addition, the distribution muscle 37b
In order to lower the rebar-assembled portion by the main bar 37a connected to the inside of the vertical hole 3, it is easy to operate the lifting device on the ground and move the main bar holding means downward. Then, the vertical hole 3 is formed by the rebar assembly and the downward movement of the main bar holding means.
The work of laying the reinforcing bar assembly can be completed. That is, the work of connecting and assembling the main bars 37a and the force bars 37b of a predetermined number of bars, and the operation of connecting the main bars 37a and the force bars 37b.
Of the reinforcing bar assembly such as the reinforcing bar cage 37 in the vertical hole 3 can be performed only by ground work. Therefore, there is no need for an operator to enter the mine or assemble a scaffold on the vertical hole 3 for assembling the rebar, and the safety is high.
In addition, the main bar holding means for supporting the reinforcing bar assembly can be lowered into the vertical hole 3 by the lifting / lowering device provided on the frame 6, so that a large crane is not required for building the reinforcing bar. Therefore, it is economical. The reinforcing bar embedding device 5 is installed and used at the position of the vertical hole 3, and the main bar 37a and the distribution bar 37b are carried in a stacked state until they are assembled, and are carried in and stored. Because it is good, the space required for building reinforcement is small. Therefore, application to the site where the construction yard is limited is also possible, and the versatility is high.

Further, in the present invention, the main bar arrangement portion 7
1 is formed in a shape corresponding to the bar arrangement pitch of the main bar 37a to be erected, a plurality of main bars 37a are provided between the main bar placement section 71 of the main bar arrangement means and the main bar holding means.
7a can be set in a form corresponding to the bar arrangement pitch. Therefore, the rebar assembly such as the rebar cage 37 is simply connected to the main rebar 37b to the main rebar 37a set in a form corresponding to the rebar pitch in a form corresponding to the rebar pitch of the rebar 37b. Can work to assemble
Very convenient. This makes it possible to proceed with the work of building the reinforcing bar more efficiently.

In the present invention, when the main bar arrangement means such as a main bar fixing means such as a stopper 72 is provided in each of the plurality of main bar arranging portions 71 so as to be freely inserted in the horizontal direction, When the main bar 37a is set so as to be inserted into the main bar placement section 71, the main bar fixing device can prevent the set main bar 37a from coming off in the horizontal direction from the main bar placement section. Therefore, the main bar 37a can be easily set between the main bar arranging portion of the main bar arranging device and the main bar holding device by inserting the main bar 37a into each main bar arranging portion 71 in the horizontal direction. The main muscle set state is stably held in such a manner that the main muscle fixing device prevents the main muscle from being horizontally disengaged from the part. Therefore, the main line 37a
And the operation of connecting the force distribution muscle 37b to the main muscle 37a can be performed more smoothly.

Further, in the present invention, a reinforcing bar locating tool such as a slide guide 8 is vertically arranged between the main reinforcing bar arrangement means and the main reinforcing rod holding means at a position aligned with the main reinforcing bar arrangement means. When arranged and arranged in the direction,
When the main bar holding means is aligned with the reinforcing bar locating tool, the main bar holding means can be positioned at a position aligned with the main bar arranging means. Then, at the time of rebar building work, the rebar assembly assembled as described above is inserted into the vertical hole 3.
In order to lower the main bar holding means, it is necessary to lower the main bar holding means into the vertical hole 3, so that the arrangement position of the main bar holding means,
In other words, it is difficult to grasp the arrangement position of the reinforcing bar assembly held by the reinforcing bar assembly. However, if the main reinforcing bar arranging means is aligned with the reinforcing bar locating tool, the reinforcing bar assembly can be moved through the reinforcing bar locating tool. The arrangement position can be arranged vertically according to the arrangement position of the main bar arrangement means. Then, since the main bar arrangement means is provided in the frame 6,
As described above, when installing the reinforcing bar embedding device 5 on the vertical hole 3, the position of the frame 6 is adjusted so that, for example, the center CL1 of the frame 6 coincides with the center CT1 of the vertical hole 3. For example, at the time of rebar installation, the assembled rebar assembly can be arranged at an accurate position of the vertical hole 3 via the rebar installation positioning tool. This makes it possible to easily obtain a uniform covering thickness.

In the present invention, the distribution muscle holding means such as the distribution muscle receiving jig 17 is movably provided from the inside to the outside of the distribution muscle building position, and the distribution muscle holding means is provided. When the means is provided with a plurality of force distribution muscle holding portions such as a plurality of hooks 191 and the like at predetermined intervals in the vertical direction, and is configured, it is set between the main muscle placement portion 71 of the main muscle reinforcement means and the main muscle holding device. Distributing muscle holding portions of the distributing muscle holding means can be respectively arranged so as to protrude from the inside to the outside of the plurality of main muscles. Then, as described above, when connecting the plurality of force distribution bars 37b to the plurality of main bars 37a, the main bars 37
The force-feeding muscle 37b is provided on the force-feeding muscle holding portion protruding outside of FIG.
In this state, the welding operation of the force distribution bars 37b to the main bars 37a can be performed. Therefore, while performing the welding operation for connecting the power distribution bars 37b to the main reinforcement 37a, the power distribution bars 37b are connected by some other means.
There is no need to hold b sideways. In addition, distributing muscle 3
By using a force-strength muscle holding unit provided with a force-strength muscle holding unit at a pitch corresponding to the muscle-arrangement pitch of No. 7, it is not necessary to determine the muscle-arrangement position of the force-strength muscle 37b one by one. Therefore, it is possible to more efficiently assemble the reinforcing bar. When it is not necessary to use the reinforcing bars, it is necessary to use the reinforcing bars at the position where the reinforcing bars are erected (that is, in the area where concrete is to be cast later).
As described above, when the main muscle 37a is moved downward via the elevating device, the force distribution muscle holding means hinders the downward movement of the main muscle 37a. Never.

[Brief description of the drawings]

FIG. 1 is a partially broken perspective view showing a state of a pile construction site where a reinforcing bar is being built using an embodiment of a reinforcing bar building device according to the present invention.

FIG. 2 is an enlarged view showing the vicinity of a wellhead of the pile construction site shown in FIG.

FIG. 3 is a plan view showing a part of a gauge disk of the reinforcing-bar laying device shown in FIG. 1;

FIG. 4 is an enlarged view of a portion of the gauge disc shown in FIG.

FIG. 5 is a plan view showing a slide guide portion of the reinforcing-bar laying device shown in FIG.

6 is a cross-sectional side view of a portion of the lower frame of the reinforcing bar erection device shown in FIG.

FIG. 7 is a view showing a state in which a main reinforcing bar is attached to the reinforcing bar building device shown in FIG. 1 using a reinforcing bar hanging jig.

FIG. 8 is a series of diagrams showing a manner in which a distribution bar is welded to a main bar at the pile construction site shown in FIG.

[Explanation of symbols]

 2a ... ground 3 ... vertical hole 3a ... mouth (headhole) 5 ... reinforcement reinforcing device 6 ... frame 7 ... main reinforcement arrangement means (gauge disk) 71 ... main reinforcement arrangement part 72 ... main reinforcement fixture ( Stopper) 8 Reinforcing bar positioning tool (slide guide) 9 Main bar holding means (lower frame) 10 Lifting device (chain block) 17 Power distribution holding means (distribution jig) 191: distribution muscle holding part (hanging tool) 37: reinforcing bar assembly (rebar cage) 37a: main reinforcement 37b: distribution muscle

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E02D 5/34 B66C 1/62 E04G 21/16

Claims (6)

(57) [Claims] When a reinforcing bar assembly for reinforcing concrete with a plurality of main bars and a plurality of distribution bars is erected in a vertical hole dug from the ground, a main reinforcement holding means is provided in the vertical hole, outside the vertical hole. Going up and down
It is installed in the vertical hole by the device so as to be able to descend freely, a plurality of main bars are vertically held by the main bar holding means in a form corresponding to each bar arrangement position of the plurality of main bars, and the vicinity of the mouth of the vertical hole is While connecting each of the plurality of distribution bars to the main bar so as to intersect with the plurality of main bars held by the main bar holding unit, the lifting / lowering device is connected to the main bar holding unit from outside the pit of the vertical hole.
By moving the plurality of main reinforcing bars connected to the plurality of force bars as the reinforcing bar assembly , the reinforcing bar assembly is mounted on the main reinforcing bar holding means by moving downwardly in the vertical hole through
A method of building a reinforcing bar, wherein the reinforcing bar is lowered into the vertical hole while being held . 2. A main bar arrangement means is provided on said frame, and said main reinforcement arrangement means holds a plurality of main reinforcement arrangement portions, and holds the main reinforcements up and down with respect to said main reinforcement arrangement portions. A main bar holding means is provided below the main bar arrangement means so as to be movable up and down; and the frame is provided with an elevating device which can move and position the main bar holding means up and down and is positioned. A reinforcing bar setting device, wherein a main bar is set between a main bar arranging portion of the device and the main bar holding device. 3. The reinforcing bar laying device according to claim 2, wherein said main reinforcing bar arranging portion is formed in a form corresponding to a reinforcing bar pitch of a main reinforcing bar to be erected. 4. The reinforcing-bar laying device according to claim 2, wherein a main-bar fixing means is provided in said main-bar arrangement means so that a main bar can be freely inserted in each of said plurality of main-bar arrangement portions in a horizontal direction. 5. A reinforcing bar built-in positioning tool is provided between said main reinforcing bar arrangement means and said main reinforcing bar holding means so as to be arranged at a position aligned with said main reinforcing bar arrangement means in a vertical direction. 2. The reinforcing bar installation device according to 2. 6. A distributing muscle holding means is provided movably from inside to outside of the distributing muscle building position, and the distributing muscle holding means includes a plurality of distributing muscle holding portions in a vertical direction. 3. The reinforcing-bar laying device according to claim 2, wherein a plurality of the reinforcing bars are provided at predetermined intervals.