JPH0853941A - Construction work method of unit floor - Google Patents

Abstract

PURPOSE:To further shorten a construction period by improving operation efficiency of a tower crane in construction work of a unit floor. CONSTITUTION:A unit floor 8 is temporarily fastened to a suspending frame 4 of a stand K. Next, an anchoring wire 10 of a suspending beam 9 fixed to the stand K is hooked on a hook 9 of a tower crane. The stand K is suspended as it is by the crane up to a floor height of a suspending purpose, and the stand K is supported with a large beam 1. Next, the crane is separated from the present stand K, and is successively installed on a previously used separate stand K, and goes to suspend the next unit floor. In parallel to this work, a unit floor 8 is suspended from the stand K arranged on the large beam 1, and while adjusting a position, installing' construction work is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method for mounting a unit floor in building construction using a tower crane.

[0002]

2. Description of the Related Art To construct a skeleton in the aboveground part of a building,
Tower cranes are commonly used. After the pillars and girders have been assembled, the unit floor is directly hung by a tower crane and transported to the girder of a predetermined floor height, and the unit floor can be mounted while maintaining the suspended state by the crane. To do. When the installation is complete, remove the pedestal wire and release the tower crane, which again hangs the next unit floor to the stockyard. Repeating this process, the unit floor is attached to the desired location in sequence.

[0003]

In recent high-rise buildings, the construction period has been considerably shortened, and 4 floors per floor
It is being built at a speed of about 5 days. At this time, the tower crane is currently installed with about 30 pieces per day, but when examining the details, slinging on the member → hoisting → horizontal movement (undulation / swing) → member mounting → It is carried out by repeating the lowering. Of these, it takes about 5 to 10 minutes on average to attach the members.

Among the members, the unit floor is installed after columns and girders are assembled, so that adjustment is required in terms of accuracy, and since it is large in plan view, it has many mounting bolts.
For this reason, the installation time of the unit floor is longer than that of other members. However, in the above-mentioned conventional method of constructing a unit floor, the tower crane is restrained by the unit floor mounting work until the unit floor is lifted and the mounting of the unit floor is completed. For this reason, the operating efficiency of the tower crane is not good, and the number of members to be attached per unit time is limited due to the restraint of the tower crane.

The present invention has been made in view of the above problems, and an object thereof is to improve the operating efficiency of a tower crane in the construction of a unit floor and to further shorten the construction period.

[0006]

In order to achieve the above object, in the method for constructing a unit floor of the present invention, a temporary placing frame that can be placed on a beam, and a suspending frame that can be lifted and lowered from the temporary placing frame. There are at least two racks, each of which has a suspension frame to which the unit floor can be attached.
After preparing and attaching the unit floor to the suspension frame of the gantry, hoisting the gantry by a tower crane and supporting the gantry on a predetermined girder, remove the tower crane from the gantry, and then the tower. The crane hangs another frame without the unit floor to hang the next unit floor, and the frame that hangs the above unit floor lowers the hanging frame and aims at the unit floor while adjusting the mounting position. The feature is that it is attached to the place where

[0007]

[Operation] Since the unit floor is hung from the pedestal, after the pedestal is supported by the girder of the target floor height,
It is possible to disconnect the crane from the unit floor. Then, the tower crane can lift another unit floor.

That is, after the gantry is supported by the girder and the tower crane is separated from the gantry, the unit floor is hung from the temporary placing frame supported by the girder via the hoisting frame to adjust the position to a predetermined place. While installing the unit floor. Then, in parallel with the above-mentioned work for mounting the unit floor, another mount that was used for transporting and mounting the unit floor to a predetermined floor height was mounted on the tower crane, the mount was suspended, and the next unit was suspended. Go to hang the floor.

As a result, the transportation cycle of the unit floor by the tower crane is shortened.

[0010]

Embodiments of the present invention will be described with reference to the drawings. First, the pedestal K for suspending the unit floor will be described. As shown in FIGS. 1 and 2, a temporary placement frame 2 that can be placed on the girder 1 and a hoist whose main body is fixed to the temporary placement frame 2. 3 and a suspension frame 4 suspended from the temporary placement frame 2 via the wire rope 3a of the hoist 3.

The temporary placement frame 2 can be placed so as to straddle two girders 1 arranged side by side, and a frame body 2a consisting of a rectangular frame is horizontally placed. Support pillars 2b, which are arranged and whose axes are oriented vertically, are configured to extend from the four corners of the frame body 2a toward the girder. Seating plates 2c capable of contacting the upper surfaces of the girders 1 are provided at the lower ends of the four support columns 2b, and the dowel pins 6 protruding from the upper surface of the girders 1 can be inserted into the seating plates 2c. A dowel hole 2d is formed.

Further, the main body of the hoist 3 is fixed to the central lower end of the frame main body 2a of the temporary placing frame 2, and the tip of the wire rope 3a of the hoist 3 is attached to the front end of the hoist 3 via the mounting wire 7. The suspension frame 4 is suspended in a horizontal state so that it can be raised and lowered. The hanging frame 4
Is provided with a frame body having substantially the same size as the unit floor 8 to be mounted in plan view.

A suspension beam 9 is bolted to the central portion of the frame body 2a of the temporary frame 2, and a suspension wire 11 for hooking on a hook 10 of a tower crane is provided on the suspension beam 9. There is. Then, two pedestals K having the above configuration are prepared. Next, the construction of the unit floor 8 using the gantry K and the tower crane will be described.

First, the unit floor 8 is hung on the suspension frame 4 of the pedestal K with a wire or temporarily fixed with a bolt or the like. Next, the suspension beam 9 is bolted to the pedestal K, and the mounting wire 10 of the suspension beam 9 is hooked on the hook 9 of the tower crane. As it is, the unit floor 8 is hung by the crane through the hanging beam 9 and the pedestal K, and is lifted to the target floor height of the girder 1 already assembled.

After hoisting up to the desired girder 1, the pedestal K is hung and the seating plates 2c of the support columns 2b are hung up.
Place on top. At this time, the dowel pin 6 protruding from the girder 1 is inserted into the dowel hole 2d formed in the seating plate 2c. As a result, the gantry K is supported by the girder 1. Next, remove the bolts and suspend the beam 9.
From the current pedestal K, and then the suspension beam 9
First, it is attached to another mount K used for lifting the unit floor 8 and placed on the girder 1.

Then, another pedestal K is attached via the suspension beam 9.
Then, the other mount K is removed from the girder 1. Further, it is hung up to the stock yard, the next unit floor 8 is hung up using the pedestal K, and the next unit floor 8 is hung up to the target floor height. During the work of suspending the next unit floor 8 in the tower crane, in the mount K installed on the girder 1,
The hoist 3 is operated to suspend the suspension frame 4 and the unit floor 8, and while adjusting the position of the unit floor 8 in the left-right direction, the unit floor 8 is bolted to a beam or the like for installation work. To do.

While repeating the above cycle,
The unit floor 8 is assembled as shown in FIG. In the figure, 11 is a pillar and 12 is a beam. As described above, in the present embodiment, when the unit floor 8 mounting work, which takes more time than other members, is performed, the tower crane is released and the next unit floor 8 can be suspended. Become. As a result, the operating efficiency of the tower crane is improved, the efficiency of the construction work of the unit floor 8 is improved, and the construction period of the building can be further shortened.

In the above embodiment, the suspension beam 9 is detachably attached to the pedestal K, and the pedestal K is hung by the tower crane via the suspension beam 9. However, the suspension beam 9 is attached to each pedestal K respectively. May be fixed, and the pedestal K to be hung may be replaced by hooking or removing the hook 9 of the tower crane from the mounting wire of each suspension beam 9.

[0019]

As described above, in the unit floor construction method of the present invention, the tower crane is released from the unit floor during the time-consuming installation work of the unit floor on the girder. Since the next unit floor can be hung up, the operating efficiency of the tower crane at the time of construction of the unit floor is improved, the construction period for the construction of the unit floor is shortened, and thus the construction of the building as a whole This has the effect of shortening the construction period.

[Brief description of drawings]

FIG. 1 is a side view showing a pedestal of an embodiment according to the present invention and a supporting state on a girder.

FIG. 2 is a plan view showing a pedestal of an embodiment according to the present invention and a state of being supported on a girder.

FIG. 3 is a view showing a seating plate of an embodiment according to the present invention.

FIG. 4 is a view showing a state where the unit floor is completely attached at a predetermined floor height.

[Explanation of symbols]

 K frame 1 Girder 2 Temporary frame 3 Hoist 4 Lifting frame 6 Dowel pin 9 Tower crane hook 11 Pillar

Claims (1)

[Claims] 1. At least two racks each comprising a temporary frame that can be placed on a beam and a hanging frame that can be lifted up and down from the temporary frame and to which a unit floor can be attached are prepared. Then, after mounting the unit floor on the suspension frame of the frame, lift the frame with a tower crane and support the frame on a specified girder, remove the tower crane from the frame, and then , Another unit without the unit floor is hung to hang the next unit floor, and the pedestal that hangs the unit floor is designed to be the unit floor while lowering the hanging frame and adjusting the mounting position. Installation method of the unit floor, which is characterized by being installed in a place.