JP2015117559A - Roof erection method and roof structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roof erection method that allows a roof unit on a steel beam to be slid and moved smoothly.SOLUTION: A roof 20 is divided into a plurality of roof units 20A, and each of the roof units 20A has a roof beam 21 spanned between a pair of keel trusses 11. A pair of rails 50 is provided on both ends on the top surface of the keel truss 11, and a pair of guiding members 45 is provided on the bottom surface of the roof beam 21. A roof erection method comprises: a step S1 in which the roof unit 20A is assembled at a prescribed position X on the keel truss 11; a step S2 in which the roof unit 20A is slid and moved along the keel truss 11 to the installation position Y; a step S3 in which the moved roof unit 20A is connected to the roof unit 20A that has already been positioned; and a step S4 in which the steps S1 to S3 are repeated for completing the roof 20.

Description

  The present invention relates to, for example, a roof construction method for constructing a steel roof of a large-scale structure and a structure of the steel roof.

Conventionally, the following methods have been proposed as a method for constructing a steel roof of a large space structure.
For example, the large space structure includes a reinforced concrete lower housing and a steel roof constructed on the lower housing. Therefore, the steel roof is divided into a plurality of roof units, each roof unit is constructed on one end side of the lower housing, and is slid to the installation position on the lower housing (see Patent Document 1).

  Here, each roof unit is provided with a guide member that comes into contact with the side surface of the lower housing, and the slide movement of each roof unit is guided by this guide member.

  According to this method, it is only necessary to construct the roof unit on one end side of the lower housing, so it is not necessary to construct a steel roof over the entire surface of the lower housing, and temporary costs such as scaffolding and lifting machines can be reduced. .

Japanese Patent No. 3855784

By the way, there is a case where it is desired to construct a steel roof on a steel truss beam. In this case, if the steel roof construction method as described above is employed, the following problems occur.
That is, the steel beam is configured by bolting steel materials having a predetermined length, but in the steel roof construction method as described above, the guide member is brought into contact with the web side surface of the steel beam.

  Then, the guide member is caught by the bolt at the joint portion of the steel beam, and it may be difficult to smoothly slide the roof unit.

  An object of the present invention is to provide a roof construction method and a roof structure that can smoothly slide and move a roof unit on a steel beam.

  The roof construction method according to claim 1 includes a pair of substantially parallel steel beams (for example, a keel truss 11 to be described later) and a roof (for example, a roof 20 to be described later) constructed between the pair of steel beams. A roof construction method for constructing a roof of a structure (for example, a large-scale structure 1 to be described later), wherein the roof is divided into a plurality of roof units (for example, a roof unit 20A to be described later). Each of the units includes a roof beam (for example, a roof beam 21 described later) constructed between the pair of steel beams, and a plate-like roof material supported by the roof beams, and the steel beams A pair of rails (for example, a rail 50 described later) extending along the steel beam is provided on the upper surface of the roof beam, and the lower surface of the roof beam is disposed with the pair of rails sandwiched between the steel beam and the steel beam. A pair extending along A first step (for example, step S1 described later) for assembling the roof unit at a predetermined position (for example, predetermined position X described later) on the steel beam is provided. ), A second step of sliding the roof unit along the steel beam and placing it at an installation position (for example, an installation position Y described later), and the moved roof unit. A third step (for example, step S3 to be described later) for connecting to a roof unit that has already been arranged, and a fourth step (for example, to be described later) to complete the roof by repeating the first to third steps. Step S4).

  According to the present invention, the roof is divided into a plurality of roof units, each roof unit is assembled at a predetermined position on the steel beam, and is slid along the steel beam and arranged at the installation position. Therefore, a scaffold and a lifting machine are installed at a predetermined position, and a roof unit is constructed at a predetermined position. Therefore, there is no need to construct a roof over the entire surface of the steel beam, and temporary costs such as scaffolding and a lifting machine are required. Can be reduced.

  In addition, a pair of rails extending along the steel beam are provided on the upper surface of the steel beam, and a pair of guide members arranged along the steel beam are provided on the lower surface of the roof beam with the pair of rails interposed therebetween. It was. Therefore, when the roof unit is slid along the steel beam, the guide member abuts on the rail to prevent the roof beam from falling off the steel beam. You can slide to.

  Moreover, even if the width of steel materials used for steel beams and roof beams is different, a pair of guide members can be arranged across a pair of rails by attaching rails and guide members to predetermined positions of these steel materials, so the roof unit The slide can be moved reliably. Therefore, since the size of the member used for the structure is not largely limited, the degree of freedom in designing the structure can be improved.

  In the roof erection method according to claim 2, the pair of rails are interrupted at the joint portion between the steel materials constituting the steel beam, and the length of the guide member (for example, length L described later) is The length of the discontinuous portion of the rail (for example, the length D described later) is longer.

The steel beam is formed by bolting or welding the H-shaped steel. Therefore, when each rail is attached to each H-section steel, the rail is interrupted at the joint between the H-sections.
So, according to this invention, the length of the guide member was made longer than the length of the part where the rail was interrupted. Thereby, since the guide member is always located on the side surface of the rail, the roof unit can be more reliably prevented from falling off the steel beam.

  The roof structure according to claim 3 is a structure of the roof including a pair of substantially parallel steel beams and a roof constructed between the pair of steel beams. The roof unit is divided into roof units, and each of the roof units includes a roof beam constructed between the pair of steel beams, and a plate-like roof material supported by the roof beams. A pair of rails extending along the steel beam are provided on the upper surface, and a pair of guide members disposed along the steel beam and provided along the pair of rails are provided on the lower surface of the roof beam. It is characterized by being able to.

  According to the present invention, there is an effect similar to that of the first aspect.

  According to the present invention, the roof is divided into a plurality of roof units, and each roof unit is assembled at a predetermined position on the steel beam, and is slid along the steel beam and arranged at the installation position. Therefore, a scaffold and a lifting machine are installed at a predetermined position, and a roof unit is constructed at a predetermined position. Therefore, there is no need to construct a roof over the entire surface of the steel beam, and temporary costs such as scaffolding and a lifting machine are required. Can be reduced. In addition, a pair of rails extending along the steel beam are provided on the upper surface of the steel beam, and a pair of guide members arranged along the steel beam are provided on the lower surface of the roof beam with the pair of rails interposed therebetween. It was. Therefore, when the roof unit is slid along the steel beam, the guide member abuts on the rail to prevent the roof beam from falling off the steel beam. You can slide to. Moreover, even if the width of steel materials used for steel beams and roof beams is different, a pair of guide members can be arranged across a pair of rails by attaching rails and guide members to predetermined positions of these steel materials, so the roof unit The slide can be moved reliably. Therefore, since the size of the member used for the structure is not largely limited, the degree of freedom in designing the structure can be improved.

It is a top view of the structure to which the roof erection method concerning one embodiment of the present invention was applied. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a side view of the steel beam which concerns on the said embodiment. It is sectional drawing of the steel beam which concerns on the said embodiment. It is a top view of the connection part of the roof and steel beam which concern on the said embodiment. It is a side view of the connection part of the roof and steel beam which concern on the said embodiment. It is sectional drawing of the connection part of the roof and steel beam which concern on the said embodiment. It is a flowchart of the procedure which constructs the roof of the structure which concerns on the said embodiment. It is a figure for demonstrating the procedure which constructs the roof of the structure concerning the said embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view of a large-scale structure 1 to which a roof erection method according to an embodiment of the present invention is applied. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line BB in FIG. In FIGS. 1 to 3, the roof material is not shown for easy understanding.

  The large-scale structure 1 includes a recess 10 formed by excavating the ground 2, a keel truss 11 as a pair of substantially parallel steel beams straddling the recess 10, and a keel truss 11 provided in the recess 10. Four supporting columns 12 to be supported and a roof 20 supported by the keel truss 11 and covering the recess 10 are provided.

  The struts 12 are disposed at two locations on each keel truss 11. The column head of each column 12 and the keel truss 11 are connected by a pair of cables 13, and thus the column 12 supports the keel truss 11.

  Each keel truss 11 is supported by four temporary receiving vents 14 at four locations. These temporary receiving vents 14 are temporary structures and are removed after the construction of the keel truss 11 is completed.

The roof 20 is divided into a plurality of roof units 20A. That is, the roof 20 is configured by connecting a plurality of roof units 20A (see FIG. 10).
Each of the roof units 20 </ b> A includes a roof beam 21 installed between a pair of keel trusses 11, and a plate-like roof material (not shown) supported by the roof beams 21.

FIG. 4 is a side view of the keel truss 11. FIG. 5 is a cross-sectional view of the keel truss 11.
The keel truss 11 is a steel truss beam, a pair of lower chord members 30 extending substantially parallel to each other, a pair of upper chord members 31 disposed above the pair of lower chord members 30 and extending substantially parallel to each other, and a pair of lower chord members A plurality of bottom surface bundling members 32 for connecting 30 members, a plurality of top surface bundling members 33 for connecting a pair of upper chord members 31, and a plurality of side surface bundling members 34 for connecting the lower chord member 30 and the upper chord member 31 Prepare.
A temporary passage 35 extending along the keel truss 11 is provided on the upper surface of the keel truss 11.

The roof beam 21 includes a large roof beam 23 laid between the pair of keel trusses 11 at predetermined intervals, and a small roof beam 24 (see FIG. 1) that connects the large roof beams 23.
Each of the roof beams 23 includes a lower chord member 40, an upper chord member 41 disposed above the lower chord member 40, a bundle member 42 that connects the lower chord member 40 and the upper chord member 41, and the upper chord member 41 to the keel truss 11. And an extending portion 43 extending to the upper surface of the upper chord material 31.

6 to 8 are a plan view, a side view, and a cross-sectional view of a joint portion between the extended portion 43 of the roof 20 and the keel truss 11.
A pair of rails 50 extending along the upper chord material 31 are provided on both end sides of the upper flange surface of the upper chord material 31 of the keel truss 11. These rails 50 are obtained by welding flat steel to the upper flange material 31 of the upper flange.

  The upper chord material 31 of the keel truss 11 is obtained by bolting or welding a steel material having a predetermined length, and the pair of rails 50 are interrupted at the joining portions of the steel materials constituting the upper chord material 31. Let D be the length of the interrupted portion.

On the lower surface of the extended portion 43 of the roof beam 21, there are a slide support 44 that contacts the upper surface of the upper chord material 31 of the keel truss 11 and a pair of guide members that are disposed across the pair of rails 50 and extend along the keel truss 11. 45 is provided.
The length L of the guide member 45 is longer than the length D of the interrupted portion of the rail 50.

Hereinafter, a procedure for installing the roof 20 of the large-scale structure 1 will be described with reference to the flowchart of FIG. 9.
First, in step S1, as shown in FIG. 10, the roof unit 20A is assembled at a predetermined position X on the steel beam. At this time, a roof beam 24 for joining to the roof unit 20A already arranged is attached to the tip side of the roof unit 20A.

  In step S2, the roof unit 20A is slid along the keel truss 11 and placed at the installation position Y, as indicated by the arrows in FIG.

  Specifically, jacks (not shown) are installed on the keel truss 11 on the traveling direction side (towing side) and on the opposite side (stain side) of the traveling direction of the roof unit 20A, and the roof unit 20A is attached by the towing side jack. While pulling, the twisting due to the movement of the roof unit 20A is suppressed by the jack on the wiping side. Accordingly, the slide support 44 of the roof unit 20A slides on the upper surface of the upper chord material 31 of the keel truss 11, and the roof unit 20A slides (see FIG. 8). At this time, the guide member 45 contacts the rail 50 to guide the movement of the roof unit 20A.

Here, by inserting a fluororesin-based sheet material or plate material between the slide support 44 and the upper chord material 31, the friction coefficient is reduced, and the roof beam 21 provided with the slide support 44 is smoothly slid. It may be moved.
Further, by disposing a fluororesin-based sheet material or plate-like material on the upper surface of the rail 50 without providing the slide support 44 on the lower surface of the roof beam 21, the lower surface of the roof beam 21 constituting the roof unit 20A is You may make it slide on the upper surface of the rail 50 directly.

  When the roof unit 20A slides, the rail 50 on the keel truss 11 is marked at predetermined intervals, the position of the extended portion 43 of the roof beam 21 is measured based on this marking, and the target of this measurement position is measured. The moving operation of the roof unit 20A is performed while confirming that the displacement with respect to the position is less than the allowable amount.

In step S3, the moved roof unit 20A is connected to the roof unit 20A already arranged.
In step S4, steps S1 to S3 are repeated to complete the roof 20.

According to this embodiment, there are the following effects.
(1) The roof 20 was divided into a plurality of roof units 20A, each roof unit 20A was assembled at a predetermined position X on the keel truss 11, slid along the keel truss 11, and arranged at the installation position Y. Therefore, since a scaffold and a lifting machine are installed at the predetermined position X, and the roof unit 20A is constructed at the predetermined position X, there is no need to construct the roof 20 over the entire surface of the keel truss 11, and the scaffold and the lifting machine. The temporary expenses such as can be reduced.

Further, a pair of rails 50 extending along the upper chord material 31 are provided on both ends of the upper surface of the upper chord material 31 of the keel truss 11, and the pair of rails 50 are sandwiched between the lower surfaces of the extending portions 43 of the roof beam 21. And a pair of guide members 45 extending along the upper chord material 31.
Therefore, when the roof unit 20A is slid along the upper chord member 31, the guide member 45 abuts on the rail 50, so that the roof beam 21 can be prevented from falling off the steel beam. The roof unit 20A can be slid smoothly.

  Moreover, even if the width dimensions of the steel materials used for the keel truss 11 and the roof beam 21 are different, the pair of guide members 45 is arranged with the pair of rails 50 sandwiched by attaching the rails 50 and the guide members 45 to predetermined positions of these steel materials. Therefore, the roof unit 20A can be slid reliably. Therefore, since the size of the member used for the large-scale structure 1 is not largely limited, the degree of freedom in designing the large-scale structure 1 can be improved.

  (2) The length L of the guide member 45 is made longer than the length D of the interrupted portion of the rail 50. As a result, as indicated by the broken line in FIG. 6, the guide member 45 is always located on the side surface of the rail 50, so that the roof unit 20 </ b> A can be more reliably prevented from falling off the keel truss 11.

  (3) Since the roof beam 24 is attached in advance to the front end side of the roof unit 20A, it is not necessary to newly lift the roof beam 24 when connecting the roof units 20A to each other, and the construction efficiency is improved. .

  It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.

1 ... Large-scale structure (structure)
2 ... Ground 10 ... Recess 11 ... Keel truss (steel beam)
DESCRIPTION OF SYMBOLS 12 ... Support | pillar 13 ... Cable 14 ... Temporary receiving vent 20 ... Roof 20A ... Roof unit 21 ... Roof beam 23 ... Roof beam 24 ... Roof beam 30 ... Lower chord material 31 ... Upper chord material 32 ... Lower surface bundle material 33 ... Upper surface bundle material 34 ... Side bundle 35 ... Temporary passage 40 ... Lower chord material 41 ... Upper chord material 42 ... Bundling material 43 ... Extension part 44 ... Slide support 45 ... Guide member 50 ... Rail

Claims (3)

For a structure comprising a pair of substantially parallel steel beams and a roof constructed between the pair of steel beams, a roof construction method for constructing the roof,
The roof is divided into a plurality of roof units;
Each of the roof units includes a roof beam constructed between the pair of steel beams, and a plate-like roof material supported by the roof beam,
On the upper surface of the steel beam, a pair of rails extending along the steel beam is provided,
The lower surface of the roof beam is provided with a pair of guide members that are disposed across the pair of rails and extend along the steel beam,
A first step of assembling the roof unit at a predetermined position on the steel beam;
A second step of slidably moving the roof unit along the steel beam and placing the roof unit at an installation position;
A third step of connecting the moved roof unit to an already placed roof unit;
And a fourth step of completing the roof by repeating the first to third steps. Each of the pair of rails is interrupted at a joint portion between steel members constituting the steel beam,
The length of the said guide member is longer than the length of the part which the said rail interrupted, The roof construction method of Claim 1 characterized by the above-mentioned. A structure of the roof of a structure comprising a pair of substantially parallel steel beams and a roof constructed between the pair of steel beams,
The roof is divided into a plurality of roof units;
Each of the roof units includes a roof beam constructed between the pair of steel beams, and a plate-like roof material supported by the roof beam,
On the upper surface of the steel beam, a pair of rails extending along the steel beam is provided,
A roof structure characterized in that a pair of guide members disposed along the pair of rails and extending along the steel beam are provided on a lower surface of the roof beam.

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