JPH05311617A - Construction method for elevated structure - Google Patents

Abstract

PURPOSE:To reduce the working time and working process and contribute to the reduction of the construction cost. CONSTITUTION:A girder member 2 assembled with reinforcing ribs 24 and reinforcing bars 25 with a structural member concurrently serving as a concrete placing formwork and a column member 1 are manufactured in a factory and conveyed to the site, and the column member 1 is erected and fixed on a foundation 3 formed at the site. The girder member 2 is mounted and fixed on the column member 1, concrete is filled and placed on both or one of the girder member 2 and the column member 1 to construct a structure. The girder member 2 and the column member 1 are manufactured in the factory as units, and the construction work at the site can be omitted that much.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing viaducts such as elevated roads and elevated railways and other elevated facilities.

[0002]

2. Description of the Related Art The conventional method for constructing an elevated structure is to construct a reinforced concrete structure mainly on site, omitting large span viaducts across other structures and rivers. Construction is carried out in the order of assembly, formwork / rebar assembly, concrete placing / curing, and formwork removal.

[0003]

However, the above-mentioned construction method is extremely time-consuming and troublesome, and due to factors such as lack of manpower, simplification of the working process has been demanded.

An object of the present invention is to provide a method for constructing an elevated structure which can solve the above problems, reduce working time and construction process, and contribute to ensuring work safety and cost reduction. And

[0005]

[MEANS FOR SOLVING THE PROBLEMS] In order to solve the above-mentioned problems, a method of constructing an elevated structure according to the present invention is a girder material incorporating a structural material which also serves as a concrete pouring formwork, a reinforcing material and a reinforcing bar. And pillar materials are manufactured at the factory and transported to the site, the pillar materials are erected and fixed on the foundation formed on the site, and then the girder materials are placed on these pillar materials and fixed, and then the girder material and the pillar The structure is constructed by placing concrete on both or one of the materials.

[0006]

According to the above construction, the structural material that retains the strength of the pillar material and the girder material is also used as the formwork for concrete placing, and the reinforcing material and the reinforcing bar are incorporated into the pillar material and the girder material as a unit. By making it into a factory and manufacturing it in a factory, it is possible to eliminate the work of assembling the scaffold and the work of assembling the formwork at the site, and further omit the work of removing the formwork. Therefore, as the number of steps is reduced, the construction period can be shortened, the number of workers can be reduced, and the safety can be improved and the cost can be reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for constructing an elevated railway according to the present invention will be described below with reference to the drawings.

In FIG. 2, reference numeral 1 denotes a pillar material which is manufactured in a factory and constitutes a frame of an elevated railway. The pillar material 1 is a cylindrical pillar cylinder material 11 for maintaining strength and a lower end portion of the pillar cylinder material 11. A base flange 12 attached to the column tubular member 11 and a girder receiving ring 13 attached to the upper portion of the column tubular member 11, and a reinforcing member for reinforcing the column member inside the column tubular member 11 as necessary. Reinforcing bars and formwork materials for pouring concrete (which may also serve as structural materials) are incorporated, and connecting reinforcing bars 14 are provided at the upper end.
Is projected.

Reference numeral 2 denotes a girder material which is manufactured in a factory and constitutes a frame of an elevated railway. The girder material 2 is composed of, for example, a bottom plate 21 also serving as a formwork for concrete pouring, front and rear side plates 22, and left and right side plates 23. It is formed in the shape of an open box, and the reinforcing ribs 24 necessary for structural calculation and the reinforcing bars 25 for reinforcement of cast concrete are arranged inside. An engaging hole 26 into which the upper end of the pillar 1 is fitted is formed in the center of the bottom plate 21, and the corners of the bottom plate 21 and the left and right side plates 23 are arc-shaped bent for aesthetic purposes. Has been done.

Reference numeral 3 is a foundation constructed by concrete on site, and anchor bolts 31 are planted at the mounting positions of the pillar materials 1. Reference numeral 4 denotes construction guide rails laid on both sides of the foundation 3 along the elevated railroad construction direction. As shown in FIG. 1, a construction machine truck 6 equipped with a crane 5 and a pillar material 1 manufactured at the factory And a material truck 7 for carrying and carrying the girder material 2.

Next, a method of constructing this elevated railway will be described. (1) At the construction site, the foundation 3 is constructed and the construction guide rails 4 are laid. On the other hand, in the factory, required pillar materials 1 and girder materials 2 are manufactured, transported to the site, and loaded on the material truck 7. (2) At the construction site, the construction work is performed while moving the material truck 7 along with the construction machine truck 6 along the construction guide rail 4. First, the column member 1 is lifted by the crane 5 to reach the bottom of the foundation 3 at a predetermined position, and a nut is attached to the anchor bolt 31 fitted in the bolt hole of the base flange 12 to fix the tightened column member. If necessary, concrete may be poured into the inside of the pillar 1 to be placed. (3) Next, the girder material 2 is hoisted by the crane 5, the fitting hole 26 of the bottom plate 21 is fitted to the upper end of the pillar material 1, and the girder material 2 is arranged on the girder receiving ring 13 of the pillar material 1. The receiving ring 13 and the bottom plate 21 are joined and fixed by welding. (4) Further, the girder material 2 and the already constructed girder material 2 are joined, and concrete 27 is poured into the girder material 2 and placed. (5) The span length of the girder material 23 may be, for example, 6 m, one block may be formed with three spans, and construction or concrete pouring may be performed for each block.

In this way, the pillar material 1 and the girder material 2 are sequentially constructed, and after curing the cast concrete, the rail 28 for the railway is laid on the girder material 2. In addition, in case of double orbit
As shown in (3), the left and right lateral girders 2, 2 are joined together when the girder material 2 is constructed.

According to the above-mentioned embodiment, a pillar material which is made of steel manufactured by a factory or a material similar thereto, is used as a structural material and a formwork, and is also prefabricated into a unit by incorporating a reinforcing material and a reinforcing bar into a unit. Since 1 and girder material 2 are carried to the site and assembled at the site, work steps such as scaffolding, formwork / rebar assembly, and formwork removal, which were conventionally required at the site, are unnecessary The construction period can be shortened. Therefore, site construction is the foundation construction. The main work is the building of the pillar material 1, the joining of the foundation 3, the pillar material 1 and the girder material 2, and the placing of concrete, which can greatly contribute to the labor shortage countermeasure and the economic effect. Furthermore, pillar materials 1 and girder materials 2 in the factory
The production of can greatly expand the degree of freedom of the shape as compared with the work performed in the conventional field.
By adopting a curved surface such as the curved shape of the corner portion of the frame, it is possible to easily provide a frame material having an excellent aesthetic feeling and a good design, which can contribute to the improvement of the cityscape.

[0014]

As described above, according to the present invention, a structural material that retains strength is also used as a formwork for concrete pouring, and a reinforcing material and a reinforcing bar are incorporated to form a pillar material and a girder material. By unitizing and manufacturing this in a factory, it is possible to omit scaffold assembly / removal work and formwork assembly / removal work in the field work process. Therefore, as the number of steps can be reduced, the construction period can be shortened, work safety can be ensured, the number of workers can be reduced, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is an external view illustrating a construction state of an elevated railway according to the present invention.

FIG. 2 is an exploded perspective view illustrating the building member.

FIG. 3 is a front partial cross-sectional view showing a column member and a girder member in the same construction state.

FIG. 4 is a side view showing a column member and a girder member in the same construction state.

FIG. 5 is a front view showing a pillar material and a girder material of another embodiment.

[Explanation of symbols]

 1 Pillar material 2 Girder material 3 Foundation 4 Construction guide rail 5 Crane 6 Construction equipment trolley 7 Material trolley 11 Pillar cylinder material 12 Base flange 13 Girder receiving ring 24 Reinforcing rib 25 Reinforcing bar 26 Reinforcement hole 27 Concrete hole 31 Anchor bolt

Claims (1)

[Claims] Claims: 1. A structural material that also serves as a formwork for concrete pouring, a reinforcing material, and a girder material and a pillar material in which reinforcing bars are incorporated are manufactured in a factory and transported to the site, and then on a foundation formed on the site. An elevated structure characterized by constructing a structure in which pillars are erected and fixed, and then girders are placed on these pillars and fixed, and then concrete is placed on both or one of the girders and pillars. How to build a structure.