JP6425779B2 - Roof structure - Google Patents

Description

  The present invention relates to, for example, a roof construction method for erecting 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 of erecting a steel roof of a large space structure.
For example, the large space structure includes a reinforced concrete lower housing and a steel roof installed 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 the lower housing is slid to the installation position (see Patent Document 1).

  Here, each roof unit is provided with a guide member that abuts on the side surface of the lower housing, and the guide member guides the slide movement of each roof unit.

  According to this method, since it is sufficient to construct the roof unit on one end side of the lower casing, there is no need to construct a steel roof over the entire surface of the lower casing, and temporary costs for scaffolding and lifting machinery can be reduced. .

Patent No. 3855784 gazette

By the way, there are cases where it is desirable to erect a steel roof on a steel truss beam. In this case, the following problems occur when adopting the steel roof construction method as described above.
That is, although steel frame beams are constructed by bolting steels of a predetermined length to each other, in the above-described method of constructing a steel roof, the guide member is brought into contact with the web side surface of the steel frame beams.

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

  An object of this invention is to provide the roof construction method and roof structure which can slide on the roof unit on steel frame smoothly.

The roof construction method of the first invention comprises a pair of substantially parallel steel frame beams (for example, keel truss 11 described later) and a roof (for example, a roof 20 described later) bridged between the pair of steel frame beams. Object (for example, large-scale structure 1 described later), the roof construction method for erecting the roof, the roof is divided into a plurality of roof units (for example, a roof unit 20A described later), the roof unit Each of the above-mentioned steel frame beams comprises a roof beam (for example, a roof beam 21 described later) installed between the pair of steel frame beams, and a plate-like roofing material supported by the roof beam. The upper surface is provided with a pair of rails (for example, rails 50 described later) extending along the steel frame beam, and the lower surface of the roof beam is disposed across the pair of rails and is provided along the steel frame beam A pair of guys A first step (for example, step S1 described below) for assembling the roof unit at a predetermined position (for example, predetermined position X described later) provided with a member (for example, a guide member 45 described later) And a second step (for example, step S2 described later) of sliding the roof unit along the steel frame beam to arrange the roof unit at the installation position (for example, the installation position Y described later); A fourth step of completing the roof by repeating a third step (for example, step S3 to be described later) connected to the roof unit already arranged and the first to third steps (for example, a step to be described later) It is preferable to provide S4) .

  According to this invention, the roof is divided into a plurality of roof units, and each roof unit is assembled at a predetermined position on the steel frame beam, and slid along the steel frame beam to be disposed at the installation position. Therefore, a scaffolding or lifting machine is installed at a predetermined position, and the roof unit is constructed at a predetermined position, so there is no need to construct a roof over the entire surface of the steel frame beam, and temporary construction costs for scaffolding or lifting machinery etc. Can be reduced.

  Further, a pair of rails extending along the steel frame beam is provided on the upper surface of the steel frame beam, and a pair of guide members disposed on both sides of the pair of rails and extending along the steel frame beam are provided on the lower surface of the roof beam. The Therefore, when the roof unit slides along the steel beam, the guide member abuts on the rail, so that the roof beam can be prevented from falling off the steel beam, so the roof unit on the steel beam is smoothened. You can slide to

  Moreover, even if the width dimensions of the steel materials used for steel frame beams and roof beams are different, by attaching the rails and the guide members to the predetermined positions of these steel materials, it is possible to arrange the pair of guide members across the pair of rails. Slide movement can be done securely. Therefore, since the size of the member used for a structure is not restrict | limited greatly, the freedom degree of design of a structure can be improved.

In the roof construction method of the second invention , each of the pair of rails is interrupted at a joint portion between steel members constituting a steel frame beam, and a length (for example, a length L described later) of the guide member is Preferably, the length is longer than the length of the discontinuous portion of the rail (for example, the length D described later) .

Steel frame beams are formed by bolting or welding H-shaped steel. Therefore, when each rail is attached to each H-section steel, the rails are broken at the joint between the H-section steels.
Therefore, according to the present invention, the length of the guide member is made longer than the length of the discontinuous portion of the rail. Thereby, since the guide member is always located on the side of the rail, it is possible to more reliably prevent the roof unit from falling off the steel beam.

The roof structure according to claim 1 comprises a pair of substantially parallel steel frame beams, a roof beam constructed on the upper surface of the steel frame beam in a cross direction with the pair of steel frame beams, and covers the steel frame beam and the roof beam. A structure of the roof including a roof, wherein the roof is divided into a plurality of roof units, and a pair of rails extending along the steel frame is welded to the upper surface of the steel frame The lower surface of the roof beam is provided with a pair of guide members disposed across the pair of rails and extending along the steel frame beam.
In the roof structure according to the second aspect of the invention, a slide bearing is provided between the pair of guide members on the lower surface of the roof beam, and slides on the upper surface of the steel frame beam.

According to this invention, the same effect as that of the first invention can be obtained.

  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 frame beam and slid along the steel frame beam to be disposed at the installation position. Therefore, a scaffolding or lifting machine is installed at a predetermined position, and the roof unit is constructed at a predetermined position, so there is no need to construct a roof over the entire surface of the steel frame beam, and temporary construction costs for scaffolding or lifting machinery etc. Can be reduced. Further, a pair of rails extending along the steel frame beam is provided on the upper surface of the steel frame beam, and a pair of guide members disposed on both sides of the pair of rails and extending along the steel frame beam are provided on the lower surface of the roof beam. The Therefore, when the roof unit slides along the steel beam, the guide member abuts on the rail, so that the roof beam can be prevented from falling off the steel beam, so the roof unit on the steel beam is smoothened. You can slide to Moreover, even if the width dimensions of the steel materials used for steel frame beams and roof beams are different, by attaching the rails and the guide members to the predetermined positions of these steel materials, it is possible to arrange the pair of guide members across the pair of rails. Slide movement can be done securely. Therefore, since the size of the member used for a structure is not restrict | limited greatly, the freedom degree of design of a structure can be improved.

It is a top view of the structure where the roof construction 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 frame beam concerning the embodiment. It is a sectional view of a steel frame beam concerning the embodiment. It is a top view of the connection part of the roof and steel frame beam which concern on the said embodiment. It is a side view of the connection part of the roof and steel frame beam which concern on the said embodiment. It is sectional drawing of the connection part of the roof and steel frame beam which concern on the said embodiment. It is a flow chart of the procedure of erecting the roof of the structure concerning the embodiment. It is a figure for demonstrating the procedure which builds the roof of the structure which concerns on 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 construction method according to an embodiment of the present invention is applied. 2 is a cross-sectional view taken along line A-A of FIG. 1, and FIG. 3 is a cross-sectional view taken along line B-B of FIG. In addition, in FIGS. 1 to 3, the roof material is not shown for easy understanding.

  The large scale structure 1 is provided with a recess 10 formed by excavating the ground 2, a pair of substantially parallel steel frame beams straddled across the recess 10, and the keel truss 11 provided in the recess 10 It comprises four supporting columns 12 and a roof 20 supported by the keel truss 11 to cover the recess 10.

  The columns 12 are disposed at two positions of each keel truss 11. The column head of each column 12 and the keel truss 11 are connected by a pair of cables 13, whereby the column 12 supports the keel truss 11.

  In addition, each keel truss 11 is supported by the temporary receiving vent 14 at four places. 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).
The roof units 20A each include a roof beam 21 installed between a pair of keel truss 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, and includes a pair of lower chords 30 extending substantially parallel to each other, a pair of upper chords 31 disposed above the pair of lower chords 30 and extending substantially parallel to each other, and a pair of lower chords A plurality of lower surface bundle members 32 connecting the pair 30, a plurality of upper surface bundle members 33 connecting the pair of upper chord members 31, and a plurality of side bundle members 34 coupling the lower chord members 30 and the upper chord members 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 roof girder 23 erected at a predetermined interval between the pair of keel truss 11 and a roof girder 24 (see FIG. 1) connecting the roof girder 23 to each other.
The roof girder 23 includes a lower chord 40, an upper chord 41 disposed above the lower chord 40, a bundle 42 connecting the lower chord 40 and the upper chord 41, and the upper chord 41 to the keel truss 11 And an extending portion 43 extending to the upper surface of the upper chord member 31.

6-8 is a top view, a side view, and sectional drawing of the connection part of the extension part 43 of the roof 20, and the keel truss 11. As shown in FIG.
A pair of rails 50 extending along the upper chord 31 is provided on both ends of the upper flange upper surface of the upper chord 31 of the keel truss 11. These rails 50 are obtained by welding the upper steel plate 31 to the upper flange.

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

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

Hereinafter, the procedure for erecting the roof 20 of the large scale structure 1 will be described with reference to the flowchart of FIG.
First, in step S1, as shown in FIG. 10, the roof unit 20A is assembled at a predetermined position X on the steel frame beam. At this time, the roof girder 24 for joining to the roof unit 20A already arrange | positioned is attached to the front end side of this roof unit 20A.

  In step S2, as shown by the arrow in FIG. 10, the roof unit 20A is slid along the keel truss 11 and disposed at the installation position Y.

  Specifically, on the keel truss 11, jacks not shown are respectively installed on the traveling direction side (traction side) of the roof unit 20A and on the opposite side (stain side) of the traveling direction, and the roof unit 20A is While pulling, the jack on the side of the stain suppresses twisting due to the movement of the roof unit 20A. Thereby, the slide bearing 44 of the roof unit 20A slides on the upper surface of the upper chord 31 of the keel truss 11, and the roof unit 20A slides (see FIG. 8). At this time, the guide member 45 abuts on the rail 50 to guide the movement of the roof unit 20A.

Here, by sandwiching a fluoroplastic sheet or plate member between the slide support 44 and the upper chord member 31, the coefficient of friction is reduced to slide the roof beam 21 provided with the slide support 44 smoothly. You may move it.
Further, the lower surface of the roof beam 21 constituting the roof unit 20A can be obtained by arranging a fluoroplastic sheet or plate on the upper surface of the rail 50 without providing the slide bearing 44 on the lower surface of the roof beam 21. The upper surface of the rail 50 may slide directly.

  During sliding movement of the roof unit 20A, the rails 50 on the keel truss 11 are marked at predetermined intervals, the position of the extension 43 of the roof beam 21 is measured based on the marking, and the target of the measurement position is obtained. The roof unit 20A is moved while confirming that the deviation from the position is less than the allowable amount.

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

According to the present embodiment, the following effects can be obtained.
(1) The roof 20 is divided into a plurality of roof units 20A, and each roof unit 20A is assembled at a predetermined position X on the keel truss 11 and slid along the keel truss 11 to be disposed at the installation position Y. Therefore, a scaffolding or lifting machine is installed at the predetermined position X, and the roof unit 20A is constructed at the predetermined position X. Therefore, there is no need to construct the roof 20 over the entire surface of the keel truss 11, and the scaffolding or lifting machine Temporary expenses such as

Further, a pair of rails 50 extending along the upper chord 31 is provided on both sides of the upper surface of the upper chord 31 of the keel truss 11, and the lower side of the extension 43 of the roof beam 21 sandwiches the pair of rails 50. And a pair of guide members 45 extending along the upper chord 31.
Therefore, when sliding movement of the roof unit 20A along the upper chord member 31, the roof beam 21 can be prevented from coming off from above the steel frame beam by the guide member 45 coming into contact with the rail 50. The roof unit 20A can slide smoothly.

  Further, even if the width dimensions of the steel materials used for the keel truss 11 and the roof beam 21 are different, the rails 50 and the guide members 45 are attached to the predetermined positions of these steel materials to arrange the pair of guide members 45 across the pair of rails 50. Since the roof unit 20A can be slid, the roof unit 20A can be reliably moved. Therefore, since the size of the member used for large scale structure 1 is not greatly restricted, the freedom of design of 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 discontinuous portion of the rail 50. Thus, as shown 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 20A can be more reliably prevented from falling off the keel truss 11.

  (3) Since the roof girder 24 is attached in advance to the tip side of the roof unit 20A, there is no need to lift the roof girder 24 anew when connecting the roof units 20A, and the construction efficiency is improved. .

  The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like as long as the object of the present invention can be achieved are included in the present invention.

1 ... Large scale structure (structure)
2 ... ground 10 ... recessed part 11 ... keel truss (steel beam)
12: Strut 13: Cable 14: Temporary support vent 20: Roof 20A: Roof unit 21: Roof beam 23: Roof beam 24: Roof beam 30: Lower string material 31: Upper string material 32: Lower surface bundle material 33: Upper surface bundle material 34 -Side bundle 35-Temporary passage 40-Lower chord 41-Upper chord 42-Bundle 43-Extension 44-Slide bearing 45-Guide 50-Rail

Claims (2)

The roof of a structure comprising a pair of substantially parallel steel frame beams, a roof beam installed on the upper surface of the steel frame beam in a cross direction with the pair of steel frame beams, and a roof covering the steel frame beam and the roof beam. The structure of
The roof is divided into a plurality of roof units,
A pair of rails extending along the steel frame beam is welded to the upper surface of the steel frame beam,
A roof structure characterized in that a pair of guide members disposed across the pair of rails and extending along the steel frame are provided on the lower surface of the roof beam. The roof structure according to claim 1, wherein a slide bearing is provided between the pair of guide members on the lower surface of the roof beam, and slides on the upper surface of the steel frame beam.

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