JP6843001B2 - Reinforcing bar cage built-in system - Google Patents

Description

The present invention relates to a reinforcing bar cage building system for building a reinforcing bar cage in an excavation ditch for constructing an underground continuous wall, a mountain retaining wall, or the like.

As disclosed in Patent Documents 1 and 2, a method of constructing an underground continuous wall by building a reinforcing bar cage in an excavation ditch excavated in the ground and pouring cast-in-place concrete into the excavation ditch is known. There is.

In Patent Document 1, by moving the reinforcing bar cage building machine in a state where the reinforcing bar cage is suspended along the rail installed on the upper surface of the guide wall of the excavation ditch, underground buried objects such as pipes and tunnels are provided. Below is a configuration that allows the placement of rebar cages.

On the other hand, Patent Document 2 discloses a rebar cage transport / building machine provided with a self-propelled crawler. This transport-building machine can lift, transport, and hang the reinforcing bar cage into the excavation ditch by itself.

Japanese Unexamined Patent Publication No. 2016-75083 JP-A-2002-30654

However, the built-in machine disclosed in Patent Documents 1 and 2 tends to be in an unstable state because the reinforcing bar cage is moved in a suspended state. Further, when the reinforcing bar cage is moved in a suspended state, the moving speed cannot be increased and it is difficult to position the built-in position, which is troublesome.

Therefore, an object of the present invention is to provide a reinforcing bar cage building system capable of efficiently building a reinforcing bar cage at an accurate position.

In order to achieve the above object, the reinforcing bar cage building system of the present invention is a reinforcing bar cage building system for building a reinforcing bar cage in an excavation ditch, and is installed according to the building position of the reinforcing bar cage. A gate-shaped turret, a moving carriage on which the reinforcing bar cage is placed and moved from the outside of the turret to the built-in position, and a suspension of the reinforcing bar cage supported by the turret. The turret portion is installed so as to straddle the excavation groove, and the moving carriage portion moves in the longitudinal direction of the excavation groove.

Here, a pair of the turret portions may be installed with the built-in position interposed therebetween, and the moving carriage portion may be configured to move a rail portion provided along the excavation groove.

Further, an insertion device for inserting a temporary receiving material for temporarily supporting the reinforcing bar cage built in the excavation ditch may be arranged adjacent to the building position.

Further, the insertion device includes a delivery unit that sends out the temporary receiving material in the width direction of the excavation groove, and a jack portion that adjusts the height of the tip of the overhanging temporary receiving material, and also includes the insertion device. Can be configured in which a plurality of units are installed at intervals in the longitudinal direction of the excavation groove.

The reinforcing bar cage building system of the present invention configured in this way has a gate-shaped turret that is installed according to the building position of the reinforcing bar cage and a moving trolley part that mounts the reinforcing bar cage and moves it onto the built-in position. It is equipped with a built-in device that suspends the rebar cage that has moved.

Therefore, the reinforcing bar cage can be efficiently supplied to the built-in position, and the reinforcing bar cage can be easily built at an accurate position by the turret portion installed according to the built-in position of the reinforcing bar cage.

In addition, if a pair of turrets are installed with the built-in position in between and the moving carriage part is moved along the rail part, positioning to the built-in position can be performed accurately in a short time. Become.

Further, if a temporary receiving material insertion device for temporarily supporting the reinforcing bar cage built in the excavation ditch is arranged adjacent to the built-in position, the weight of the reinforcing bar cage becomes large and a large temporary reinforcing bar is temporarily supported. Even if a receiving material is needed, it will be possible to easily perform temporary receiving.

Further, if the insertion device is provided with a jack portion for adjusting the height of the tip of the temporary receiving material, even if the tip of the temporary receiving material hangs down, the height can be adjusted and delivered to a desired position. ..

It is a top view explaining the structure of the reinforcing bar cage building system of this embodiment. It is a side view explaining the structure of the reinforcing bar cage building system of this embodiment. It is a front view explaining the structure of the reinforcing bar cage building system of this embodiment. It is explanatory drawing which cut and showed a part of the temporary receiving material in order to explain the structure of the insertion apparatus. It is a figure for demonstrating the structure of the insertion apparatus, (a) is a side view, (b) is a sectional view seen in the direction of arrow AA, (c) is a sectional view seen in the direction of arrow BB. Is. It is a process drawing explaining the building process by the reinforcing bar cage building system of this embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3 are views for explaining the configuration of the reinforcing bar cage building system 1 of the present embodiment. This reinforcing bar cage building system 1 is used when an existing structure such as a viaduct or a building becomes an obstacle and a large crane or the like cannot be used.

That is, when an excavation ditch T is provided in the ground G and a continuous underground wall or a mountain retaining wall is constructed by cast-in-place concrete, if the depth of the continuous underground wall or the like is large, a tall reinforcing bar cage must be built. Must be.

In such a case, a large crane can be used to build the rebar cage at the construction site where a large crane can be installed and a large work yard for assembling the large rebar cage can be secured.

However, if there are restrictions on short heads such as a viaduct over the building position P (low heads), or if it is a narrow construction site where it is difficult to secure a large work yard such as in the city center, The reinforcing bar cage will be divided into heights of about 4m to 10m for construction. The reinforcing bar cage building system 1 of the present embodiment is used to build the reinforcing bar cage S divided in this way at a predetermined position of the excavation groove T.

As shown in FIG. 1, the excavation groove T described in the present embodiment is formed in a strip shape having a substantially rectangular shape in a plan view. Guide walls T1 and T1 are provided on both sides of the excavation groove T substantially in parallel.

As shown in FIG. 3, the guide wall T1 is formed of a steel material or the like in order to protect the wellhead of the excavation groove T and use it as a ruler. Here, the portion of the guide wall T1 that is the side edge of the excavation groove T is referred to as the groove edge portion T2.

The reinforcing bar cage building system 1 of the present embodiment is supported by a pair of gate-shaped turrets 2 and 2, a moving carriage portion 3 on which the reinforcing bar cage S is placed and moved, and turrets 2 and 2. It is mainly composed of a built-in device having a hanging jig 24 capable of suspending S.

As shown in FIG. 1, the pair of turret portions 2 and 2 are installed so as to sandwich the built-in position P of the reinforcing bar cage S. As shown in FIG. 3, the turret portion 2 is installed so as to straddle the excavation groove T. That is, the turret portion 2 is formed by the strut portions 21 and 21 built on both sides of the excavation groove T and the beam portion 22 bridged between the upper ends of the strut portions 21 and 21.

Further, as shown in FIG. 2, the upper ends of the turret portions 2 and 2 installed at intervals in the longitudinal direction of the excavation groove T are connected by the connecting beam portion 23. That is, as shown in FIG. 6A, the support pedestal 20 having a rectangular shape (square shape) in a plan view is assembled by the turret portions 2 and 2 and the connecting beam portions 23 and 23.

As shown in FIGS. 2 and 3, hanging jigs 24 and 24 are attached to the ceiling of the support pedestal 20 composed of the turrets 2 and 2. The hanging jigs 24 and 24 are a part of a building device for lifting the reinforcing bar cage S arranged below and suspending the reinforcing bar cage S in the excavation groove T.

Then, the reinforcing bar cage S is conveyed below the hanging jigs 24 and 24 by the moving carriage portion 3. That is, the moving carriage portion 3 is a transporting means for moving the reinforcing bar cage S from the outside of the turret portion 2 to the built-in position P through the bottom thereof.

The moving carriage portion 3 is mainly composed of a flat plate-shaped mounting base portion 31 for mounting the reinforcing bar cage S, and a crawler portion 32, which is a traveling means arranged below the mounting base portion 31, for example, at four corners. It is composed of.

The moving carriage portion 3 moves the rail portions 4 and 4 provided along both side edges of the excavation groove T. That is, as shown in FIGS. 1 and 3, horizontal members 41, ... Are bridged between the guide walls T1, T1 (groove edges T2, T2) at intervals in the longitudinal direction of the excavation groove T. ..

Then, as shown in FIG. 3, the rail portion 4 is installed on the end portion of the horizontal member 41 directly above the groove edge portion T2. The rail portion 4 is formed of channel steel or the like, and the crawler portion 32 runs inside the rail portion 4.

Since the rail portion 4 is provided along the guide wall T1, the moving carriage portion 3 can be moved along the excavation groove T by a path determined in the longitudinal direction by fitting the crawler portion 32 into the rail portion 4. ..

Subsequently, the insertion device 5 arranged adjacent to the built-in position P of the reinforcing bar cage S will be described. As shown in FIG. 1, the insertion device 5 is a device for inserting temporary receiving members 51, 51 for temporarily supporting the reinforcing bar cage S built in the excavation groove T.

The detailed configuration of the insertion device 5 will be further described with reference to FIGS. 4 and 5. Here, the reinforcing bar cage S is manufactured in a rectangular parallelepiped shape by a plurality of horizontal bars S1, ... And a plurality of vertical bars S2, ..., And a reinforcing frame S3 or the like is attached as needed.

As shown in FIGS. 5 (b) and 5 (c), the temporary receiving member 51 sent out by the insertion device 5 in the width direction (longitudinal orthogonal direction) of the excavation groove T has, for example, a substantially I-shaped cross section. That is, the temporary receiving material 51 has a shape in which the upper flange 512 and the lower flange 513, which are substantially parallel to each other in the vertical direction, are connected by the web 511. The temporary receiving material 51 is inserted below, for example, the horizontal bars S1, ... Of the reinforcing bar cage S, and the reinforcing bar cage S is supported by placing the horizontal bars S1, ...

In FIG. 4, in order to explain the configuration of the insertion device 5 in an easy-to-understand manner, the cut surface of the web 511 is shown by removing the upper flange 512 of the temporary receiving member 51. The temporary receiving material 51 is housed in the case portion 52 when the insertion device 5 is installed (see FIG. 3), and is driven in the width direction of the excavation groove T by driving the delivery portion 53 after the reinforcing bar cage S is built. Be sent out.

A chain portion 54 is attached to one side surface of the web 511 of the temporary receiving material 51. As shown in FIG. 5C, the chain portion 54 is arranged along the upper surface of the lower flange 513, and at least both ends thereof are fixed to the web 511 by the fastening portion 541.

The chain portion 54 is attached to the temporary receiving member 51 with a margin portion for bridging over the rotation drive portion. The delivery unit 53 includes a drive motor 531 and a main gear unit 532 that can be rotated in both directions by the drive motor 531 and sub gear units 533 and 533 that are arranged adjacent to the main gear unit 532.

The margin portion of the chain portion 54 is bridged between the main gear portion 532 and the sub gear portions 533 and 533 on both sides. When the main gear portion 532 is rotated in this state, the temporary receiving member 51 is sent out to the reinforcing bar cage S side or the case portion 52 side.

A plurality of rollers for controlling the posture of the temporary receiving member 51 are arranged in the delivery unit 53. For example, horizontal rollers 56, 56 that limit the lateral movement and inclination of the temporary receiving member 51, which is the longitudinal orthogonal direction, are arranged before and after the sending portion 53.

The horizontal rollers 56 and 56 are arranged on both sides of the upper flange 512 as shown in FIG. 5 (b). By sandwiching the temporary receiving material 51 from both sides by the horizontal rollers 56 and 56, it is possible to suppress the movement and inclination of the temporary receiving material 51 in the lateral direction (direction orthogonal to the axis).

Further, support rollers 57 and 57 are arranged in front of the delivery portion 53 (excavation groove T side). By receiving the upper flange 512 from below by the support rollers 57 and 57, the temporary receiving member 51 can be supported in a floating state.

The support rollers 57 and 57 are connected to the jack portions 55 and 55, respectively. Then, when the jack portions 55 and 55 are expanded and contracted, the height positions of the support rollers 57 and 57 are moved up and down. That is, the height at which the temporary receiving member 51 is supported can be adjusted by operating the jack portions 55 and 55.

Further, as shown in FIG. 5C, reaction force rollers 58 and 58 are arranged behind the delivery unit 53 (on the case unit 52 side). By limiting the lifting of the upper flange 512 by the reaction force rollers 58 and 58, it is possible to suppress the sagging of the tip of the temporary receiving member 51.

Next, the step of building the reinforcing bar cage S by the reinforcing bar cage building system 1 of the present embodiment will be described with reference to FIG.

First, the ground G is excavated while injecting a stabilizer to provide an excavation ditch T. The excavation ditch T is, for example, a cavity for constructing an underground continuous wall, and is formed according to the width (thickness), extension length, and depth of the underground continuous wall. FIG. 6A shows a plan view of the excavation groove T formed in a strip shape.

Guide walls T1 and T1 are provided on both side edges of the excavation groove T in the width direction, respectively. Reinforcing bar cages S will be sequentially built in the excavation groove T, and in FIG. 6, a substantially center in the longitudinal direction of the excavation groove T will be described as a building position P.

A pair of turrets 2 and 2 are installed with the built-in position P in between. The support pedestal 20 is assembled by connecting the upper ends of the turrets 2 and 2 arranged at intervals in the longitudinal direction of the excavation groove T by the connecting beam portions 23 and 23.

Rail portions 4 and 4 are provided on the support pedestal 20 and the guide walls T1 and T1 around the support pedestal 20. In particular, in FIG. 6, since the moving carriage portion 3 is arranged on the right side of the support frame 20, the rail portions 4 and 4 are provided in a range including the vehicle allocation position.

The rebar cage S is conveyed to the moving carriage portion 3 by the transport device 33. The transport device 33 is a vehicle having claws such as a forklift, and transports the reinforcing bar cage S to the moving carriage portion 3 by traveling on a side road of the excavation groove T, for example.

The reinforcing bar basket S transported by the transport device 33 is manufactured at a height that allows it to pass under the turret portion 2. Therefore, when the depth of the underground continuous wall becomes large, a sufficient number of reinforcing bar cages S to reach the depth are built in the building position P.

Subsequently, as shown in FIG. 6B, the reinforcing bar cage S is moved from the transport device 33 onto the moving carriage portion 3. The transport device 33 that lowered the reinforcing bar cage S returns to the stockyard of the reinforcing bar cage S in order to load the reinforcing bar cage S to be built next.

Then, as shown in FIG. 6C, the moving carriage portion 3 on which the reinforcing bar cage S is placed is moved along the rail portions 4 and 4 and passed under the turret portion 2. The hanging jig 24 of the support pedestal 20 is slinged on the reinforcing bar cage S transported to the built-in position P by the moving carriage portion 3.

When the reinforcing bar cage S is suspended by the erection device of the support gantry 20, the load of the moving trolley portion 3 is removed. Therefore, as shown in FIG. Return to position.

The reinforcing bar cage S suspended from the support frame 20 is built inside the excavation groove T by operating the building device. As shown in FIG. 5A, the reinforcing bar cage S is settled to a position where the upper portion (for example, the uppermost horizontal bar S1) protrudes from the excavation groove T.

As shown in FIG. 6E, two insertion devices 5 and 5 are installed adjacent to the built-in position P of the reinforcing bar cage S at intervals in the longitudinal direction of the excavation groove T. Then, as shown in FIG. 6 (f), the reinforcing bar cage S is supported by the temporary receiving members 51 and 51 on two sides.

By activating the delivery portion 53 of the insertion device 5, the temporary receiving member 51 is connected to the uppermost horizontal bar S1 of the reinforcing bar cage S and the upper surface of the guide wall T1 (groove edge portion T2) as shown in FIG. 5 (a). Is sent out during.

If the tip of the temporary receiving material 51 hangs down when it is sent out, the height of the tip of the temporary receiving material 51 can be adjusted by extending the jack portions 55 and 55.

The temporary receiving material 51 sent out in this way is bridged between the groove edges T2 and T2 of the excavation groove T. The temporary receiving members 51 and 51 temporarily support the reinforcing bar cage S, and the next reinforcing bar cage S is sent into the support frame 20 by the moving carriage unit 3.

Then, a joint work is performed to connect the lower end of the upper reinforcing bar cage S suspended by the building device of the support frame 20 and the upper end of the reinforcing bar cage S temporarily received by the temporary receiving members 51 and 51.

After the joint work, the upper reinforcing bar cage S is settled in the excavation groove T together with the lower reinforcing bar cage S by the building device of the support frame 20. By repeating the steps described above, the reinforcing bar cage S is built up to a desired depth.

Next, the operation of the reinforcing bar cage building system 1 of the present embodiment will be described.

The reinforcing bar cage building system 1 of the present embodiment configured in this way is built by mounting the gate-shaped turrets 2 and 2 installed according to the building position P of the reinforcing bar basket S and the reinforcing bar basket S. It is provided with a moving carriage portion 3 that is moved onto the crowded position P, and a building device that suspends the moved reinforcing bar cage S.

Therefore, the reinforcing bar cage S can be efficiently supplied to the built-in position P, and the reinforcing bar cage S can be easily and accurately positioned at the correct position by the turrets 2 and 2 installed according to the built-in position P of the reinforcing bar cage S. Can be built.

Further, if the configuration is such that a pair of turret portions 2 and 2 are installed in advance at a predetermined position sandwiching the built-in position P and the moving carriage portion 3 is moved along the rail portions 4 and 4, the determination is made. Since it moves along the route, it becomes possible to accurately position the vehicle at the built-in position P in a short time.

Further, if the insertion device 5 of the temporary receiving material 51 for temporarily supporting the reinforcing bar cage S built in the excavation ditch T is arranged adjacent to the building position P, the underground continuous wall to be constructed Even when a large temporary receiving material 51 is required due to a large depth of the reinforcing bar cage S and a large weight of the reinforcing bar cage S, the temporary receiving material can be easily received. That is, even the temporary receiving material 51, which is difficult for the worker to install manually, can be easily installed by operating the drive motor 531 of the delivery unit 53.

Further, if the insertion device 5 includes a jack portion 55 for adjusting the height of the tip of the temporary receiving material 51, even if the tip of the temporary receiving material 51 hangs down, the height is adjusted and the insertion device 5 is inserted into a desired position. Can be passed.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes to the extent that the gist of the present invention is not deviated are described in the present invention. Included in the invention.

For example, in the above-described embodiment, the delivery unit 53 including the main gear unit 532 in which the chain unit 54 is aligned with the temporary receiving material 51 and meshes with the chain portion 54 has been described, but the present invention is not limited to this, and the temporary receiving material is not limited thereto. The structure may be such that the 51 can be sent out in the width direction of the excavation groove T.

Further, in the above-described embodiment, the case where the turrets 2 and 2 are installed with the built-in position P in between to assemble the support pedestal 20 has been described, but the present invention is not limited to this, and the lower portion of the support pedestal 20 is not limited thereto. It is also possible to attach traveling means such as wheels and crawlers to the vehicle to make it movable.

Further, in the above-described embodiment, the temporary receiving material 51 having a substantially I-shaped cross section such as I-shaped steel has been described, but the present invention is not limited to this, and a steel material such as a square steel pipe or a channel steel is temporarily received. It can also be used as a material.

1 Reinforcing bar cage building system 2 Tower 24 Hanging jig (building device)
3 Moving trolley part 4 Rail part 5 Inserting device 51 Temporary receiving material 53 Sending part 55 Jack part T Excavation groove S Reinforcing bar cage

Claims (4)

It is a rebar cage building system for building a rebar cage in an excavation ditch.
A gate-shaped turret that is installed according to the position where the reinforcing bar cage is built,
A moving carriage portion on which the reinforcing bar cage is placed and moved from the outside of the turret portion to the built-in position by passing under the turret portion.
It is equipped with a built-in device that is supported by the turret and is capable of suspending the reinforcing bar cage.
A reinforcing bar cage building system characterized in that the turret portion is installed straddling the excavation groove and the moving carriage portion moves in the longitudinal direction of the excavation groove. The reinforcing bar cage building according to claim 1, wherein a pair of the turret portions are installed with the built-in position interposed therebetween, and the moving carriage portion moves a rail portion provided along the excavation groove. system. Claim 1 or 2 is characterized in that an insertion device for inserting a temporary receiving material for temporarily supporting the reinforcing bar cage built in the excavation ditch is arranged adjacent to the building position. Reinforcing bar cage building system described in. The insertion device includes a delivery portion that sends out the temporary receiving material in the width direction of the excavation groove, and a jack portion that adjusts the height of the tip of the overhanging temporary receiving material.
The reinforcing bar cage building system according to claim 3, wherein a plurality of the insertion devices are installed at intervals in the longitudinal direction of the excavation groove.