JPH0686751B2 - Construction method for the roof of a large-scale building - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for constructing a roof portion of a large-scale building.

[Problems to be solved by this invention]

In a large-scale building such as a gymnasium, the span of the beam becomes extremely large, and thus various construction methods have been conventionally used for constructing such a beam.

For example, it is adopted to erected a temporary support pillar and extend the beam in order while supporting it with this temporary support pillar, but such a construction method requires a large number of temporary materials and the construction cost becomes expensive. At the same time, the amount of work in high places will increase and the risk will increase.

It is an object of the present invention to provide a construction method for a large-scale building roof portion, which has a short construction period, a low construction cost, and can further reduce dangerous work.

[Means for Solving Problems] The method of constructing the roof portion of such a large-scale building in the present invention mainly uses a crane to construct a beam.

First, a total of four large black columns are erected, one in each of the four directions.

Two large cranes are used to hoist the large beams grounded above the ground, and they are erected between the large black columns to form a U-shape.

Next, multiple girder beams are assembled like a girder in the internal space surrounded by the girders.When installing each girder beam, the girder beam is divided into three parts in the longitudinal direction, and first the left part of the girder beam is The right end is connected to a large beam and supported by a temporary strut, and the central part of the double girder beam is arranged between the left and right ends of the double girder to be connected, and the double girder beams are sequentially crossed to form a double girder.

The other feature is that a large beam in one direction is installed between large black columns to form a square shape.

〔Example〕

The present invention will be described in detail below based on an embodiment shown in the drawings.

In the figure, 1 is a large black pillar, and one is installed in each of the four directions forming the four corners of the building, a total of four standing on the ground (see FIG. 1). A large beam 2 having a truss structure grounded above the ground is erected between the large columns 1 and 1. The large beam 2 is hung by large cranes 3 and 3 and is erected between the large columns 1 and 1 so that the left and right ends of the large beam 2 are supported by the large columns 1, and first, three large beams 2 are provided between the large columns 1 and 1. Cross over and assemble in a U shape (see FIGS. 2 and 3).

The construction of the girder 2 will be described in more detail. As shown in FIGS. 2 and 3, the large beam 2 includes two split beams 2a and 2b, respectively.
And the connecting beam 2c. At the time of erection, the divided beams 2a and 2b are first grounded on the ground and hinged on the rotary mount 8 fixed to the ground (see FIG. 7). This split beam
2a and 2b are sequentially erected by large-sized cranes 3 and 3, and are rotated around the rotary table 8 as an axis to stand up (see FIG. 8).

The divided beams 2a and 2b are sequentially removed from the rotary mount 8 and lifted up by the cranes 3 and 3 to be installed between the large black columns (see FIGS. 9 to 11). In this case, split beams 2a, 2b
A trough wire 10 is stretched from the ground to prevent deformation due to wind load and finely adjust the erection accuracy. Also split beams
With 2a and 2b lifted, connecting beam 2c between split beams 2a and 2b
Is attached, the crane 3 and 3 are released at the predetermined position, the crane 3 and 3 are released, the installation accuracy is confirmed, and the trawl wire 10 is removed. By sequentially repeating the same operation, the girder 2 is installed between the big columns 1 and 1.

The girder 2 erected as described above is erected in a U-shape that surrounds three directions except one direction (see FIG. 3), and the girder is placed in the internal space surrounded by these girders 2 and 2. The cross girder beam 4 for combining the beams in a circular shape is erected (see FIGS. 4 and 5).

The double girder beam 4 is a combination of two H-shaped steels, and the entire lengthwise direction is formed in a mountain shape. At the time of erection of the cross girder beam 4, the cross girder beam 4 is erected between the girders 2, 2 in a state of being divided into a central portion 5 and left and right end portions 6 in the length direction.

Immediately below the girder beam 4 to be erected, temporary columns 7, 7 are erected at right and left intervals from the large beam 2. First, girder beam 4
The left and right end portions 6 and 6 of the above are respectively lifted by a large-sized crane 3, one end of which is connected to a large beam 2 which is already erected in a direction perpendicular to the cross girder 4 from the side direction, and the other end is on a temporary support column 7. (See Fig. 4).

Next, the central portion 5 of the cross girder beam 4 is hoisted by the large cranes 3 and 3 and is placed between the left and right end portions 6 and 6 which have already been erected, and is placed on the temporary support columns 7 and 7, and the central portion of the cross girder beam 4 is placed. Both ends of 5 are connected to the left and right ends 6 and 6, respectively, and the jacks on the temporary columns 7 and 7 are lowered to load the central part 5 to the left,
Support by the right edge. Furthermore, between the large girder 4 (which was installed parallel to the girder beam) and the girder beam 4, and between the girder beam 4 and the girder beam 4.
Connecting beams are connected to each other and connected to each other, and the above work is sequentially performed to form a beam frame structure in which the U-shaped internal space is combined in a girder shape by the girder beams 4 and the connecting beams 9 (FIG. 5,
(See FIG. 6).

Finally, the remaining one-direction girder 2 is erected between the big black columns 1 and 1 and assembled into a square shape with four girders 2 to complete the beam structure of the roof portion (see FIG. 6).

〔The invention's effect〕

Since the present invention hangs and erects the beams grounded on the ground by the two cranes as described above, it is possible to reduce temporary materials as much as possible, shorten the construction period, and reduce the construction cost. .

Further, the work at a high place is reduced, and the risk of work can be reduced.

[Brief description of drawings]

1 to 6 are perspective views showing the construction order of the present invention, and FIGS. 7 to 11 are side views showing the construction order of the girder installation. 1 ... Daikoku Pillar, 2 ... Large Beam, 3 ... Crane, 4 ... Double Girder Beam, 5 ... Central part of Double Girder Beam, 6 ... Left and right ends of Double Girder Beam, 7 ... Temporary Post, 8 ... Rotating frame, 9 ... Connecting beam, 10 ... Tra-wire.

Continuation of the front page (72) Kazumi Aizawa 4-51 Ota-machi, Naka-ku, Yokohama-shi, Kanagawa Kashima Construction Co., Ltd., Yokohama Branch (72) Kazumi Horiuchi 4-51, Ota-cho, Naka-ku, Yokohama, Kanagawa Ken Incorporated Yokohama Branch (72) Inventor Masahiro Inoue 4-51 Ota-machi, Naka-ku, Yokohama, Kanagawa Construction Kashima Construction Yokohama Branch (72) Inventor Kohei Minowa 4-51 Ota-machi, Naka-ku, Yokohama-shi, Kanagawa Kashima Construction Co., Ltd.Yokohama Branch

Claims (1)

[Claims] 1. A total of four large black pillars are erected in each of four directions, and a large beam grounded on the ground is lifted by two cranes and erected between the large black pillars to form a U-shape. , Next, a plurality of girder beams are assembled in a girder shape in a U-shaped internal space surrounded by girders.When erecting a girder beam, the girder beam is divided into three parts in the longitudinal direction, First of all, on the left side of the beam
The right end is connected to a large beam and supported by a temporary strut, and the center part of the girder beam is hoisted by two cranes to connect and connect between the left and right ends of the girder beam, and cross the girder beams sequentially. The construction method of the roof of a large-scale building is characterized by arranging it in the shape of a cross girder, and then erection a large beam in the other direction between the large black columns to form a square shape.