JPH0460061A - Roof lift-up construction method - Google Patents

Abstract

PURPOSE:To improve the working efficiency by lifting up a roof with the extension of pantographs, temporarily fixing the pangographs, then constructing skeletons and spectator seats with the link arms of the pantographs. CONSTITUTION:Multiple hydraulic pantographs 3 of vertical lift devices are installed on the on-site ground 1, and temporary supports are assembled at positions corresponding to joint sections of the roof members 2a of a roof 2. The pantographs 3 are lifted up to the preset height, and members restricting the link movement of link arms 3a of the pantographs 3 are added and temporarily fixed. Skeletons 8 of pillars and walls and spectator seats 7 are constructed with the link arms 3a.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a roof lift-up method for assembling a roof bridge of a large-space structure on the ground, attaching roofing materials, etc., and then lifting the bridge to a predetermined position.

"Prior Art" Conventionally, when assembling the roof of a large space structure, the mainstream construction method was to sequentially erect individual members at predetermined height positions. However, with conventional construction methods, most of the work is done at high places, which is difficult, has low work efficiency, is dangerous, and takes a long time; skills are generally declining, temporary safety measures required for work at height have become more stringent, and larger cranes have to be used, reducing transport and operating costs. Furthermore, if a climbing crane is used, let alone a truck crane, it must be installed outside the structure, requiring a considerable amount of extra space for the crane installation and a foundation for the crane equipment. Construction work or ground curing is required, but most construction sites are often surrounded by buildings, making it difficult to transport materials, handle them, and secure scaffolding. For these reasons, there is no need for a large crane, and the work can be done on the ground or at a low location, making it highly safe.
At the same time, a method of construction in which the roof is assembled near the ground and is lifted up to a predetermined height has become more and more efficient and can shorten the construction period.

In order to lift the roof with this construction method, the roof is generally suspended from temporary brackets using temporary rods, and a center hole jack attached to the rods is used to lift the roof.

``Problem to be solved by the invention'' In the conventional lift-up method, when lifting, it is necessary to keep the uneven height to a minimum so as not to cause torsional deformation of the roof attached to temporary rods, etc. However, in order to do this, multiple hydraulic jacks are used to simultaneously raise the lift in a flat state to control the height and speed of the lift, which results in a slow rate of rise, high lifting equipment costs, and construction costs. It has the disadvantage that it takes a long time, requires know-how regarding elevated construction, and can only be performed by specific construction companies. Also, in this construction method, pillars.

It is a prerequisite that the wall frame has already been constructed, after installing the temporary rods and replacing the roof that has been elevated, but this requires the installation and removal of temporary materials such as temporary scaffolding and temporary rods, making the process cumbersome.

It is an object of the present invention to provide a roof lift-up construction method that allows quick lifting work and eliminates the need for installing and removing temporary materials, thereby greatly increasing work efficiency.

"Means for Solving the Problems" In order to achieve the above object, in the roof lift-up method of the present invention, a predetermined number of hydraulic pantographs are installed around the roof, and temporary pantographs are installed at the roof member joints. Assembling supports, assembling the roof frame and installing finishing materials such as roofing materials on the ground, then lifting the roof to a predetermined height by extending the pantograph, and then temporarily attaching the pantograph, A pillar on which the temporarily attached pantograph is permanently attached while using the link arm of the temporarily attached pantograph as a scaffolding and structural material.

The plan was to construct the framework of the wall and the seats for the audience.

``Operation'' According to the construction method of the present invention configured as described above, a roof assembled on the ground can be lifted up by activating a hydraulic cylinder and extending the pantograph that supports the periphery of the roof.

The roof is mounted on the top of the pantograph, giving it a degree of freedom, and since hydraulic pressure is used, lifting can be done smoothly. Once the pantograph has been lifted up, it will act as a support and also serve as a scaffolding and structural material for constructing pillars, walls, and audience seats. By fixing the points of the pantograph on the pillars and walls, the pantograph is permanently fixed and becomes a structure. In other words, conventional lift-up materials are temporary materials that must be removed, but in the present invention, they can be incorporated into the structure as is, making removal unnecessary.

``Example j'' To explain the example with reference to the drawings, in Fig. 1, a predetermined number of hydraulic pantographs 3, which are vertical lifting devices, are installed in an area corresponding to the periphery of the roof 2 on the site site 1. At the same time as installing the roof members 2a, temporary supports 4, etc. are installed at the joint portions of the roof members 2a, and the roof 2 is assembled on the ground while being supported by these.

Thereafter, as shown in FIG. 2, the roof 2 is lifted up to a predetermined height by extension of the pantograph 3°, and then the link arm 3a of the pantograph 3 is lifted up.

. . . A member 9 for restraining the link movement is additionally installed and temporarily attached.

As for the pantograph 3, one in which hydraulic cylinders 5 and 6 are provided at the upper and lower link points, as shown in the illustrated example, is suitable for smooth extension work.

Next, as shown in Fig. 3, the temporarily attached pantograph 3 will serve as a scaffold for constructing the pillar and wall frame 8, and the tilted link arm 3a will serve as the optimal structural frame for the audience seats 7, so use this. Then, the pillars, wall frame 8, and audience seats 7 are constructed. At this time, the final fixing is performed by integrally fixing the points of the pantograph 3 to the frame 8. Thereby, the pantograph 3 becomes a structure.

"Effects of the Invention" Since the present invention is configured as described above, it produces the effects described below.

(1) Since hydraulic pressure is used, smooth operation is possible and safety is improved.

(2) Lift-up can be completed in one day.

(3) Construction period will be reduced by approximately 70% compared to conventional methods.

(4) Since the roof geoglyph does not require the construction of columns and wall structures to support the roof, temporary materials and lifting equipment are greatly simplified.

(5) Great efficiency can be expected due to the rationality of using scaffolding, construction frames, and even structures after lifting up without removing the vertical lifting device.

(6) The lift-up method can be extended to a wide range of businesses and made possible, making a great contribution to the industry.

[Brief explanation of the drawing]

1 to 3 are explanatory diagrams of the procedure of the construction method of the present invention. 1... Site site, 2... Roof, 2a... Roof member, 3... Hydraulic pantograph, 3a... Link arm, 9... Member, 4... Temporary support, 5.
6. Hydraulic cylinder 7... Spectator seats, 8...
skeleton. No need for too much

Claims (1)

[Claims] (1) A predetermined number of hydraulic pantographs will be installed around the roof, temporary supports will be erected at the joints of the roof members, and the assembly of the roof frame and the installation of finishing materials such as roofing materials will be carried out on the ground. After that, when the roof is lifted up to a predetermined height by extension of the pantograph, the pantograph is temporarily attached, and the link arm of the temporarily attached pantograph is used as a scaffold and a structural member, and a pillar is used to permanently fix the pantograph. , a roof lift-up construction method characterized by constructing a wall frame and spectator seats.