JPH101914A - Method of constructing floor slab of road - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save man-hours for constructing a floor slab of a road by manufacturing at a factory a concrete wall bulstrade with projected lattice beams, iron reinforcement, and a bottom plate and a floor slab fixed with the lattice beams on the bottom plate, and installing this on the major beam for implementing a required binding, reinforcement of iron bars, and concrete placement. SOLUTION: The concrete wall bulstrade has a lattice beam 4, a plurality of reinforcing iron bars 5 having a sufficient fixing length projected in the longitudinal direction at constant distances on one surface side of the lower part, and a metal panel bottom plate 6 is provided in projected relation in the same direction, then the bottom plate 6 is fastened with the lattice beam 4. In the floor slab 2, the floor plate 6 of the concrete wall bulstrade 1 and the bottom plate 7 of the floor slab have an equal length at lane view, and both lattice beams 4 and 8 are disposed at equal distances. The lattice beam 4 of the concrete wall bulstrade 1 and the lattice beam 8 of the floor slab 2 are projected less than the end part of each bottom plate 6, 7, and are coupled by a joint 10 in a state where both the lattice beams 4, 8 are put in an abutment with each other in its end parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slab method for slabs of elevated roads and the like in a short period of time and at low cost.

[0002]

2. Description of the Related Art Conventionally, a road slab is constructed by installing a scaffold, installing a slab formwork on a main girder, arranging reinforcements, placing concrete, and curing the concrete after curing. After the mold is removed from the frame, the formwork of the balustrade on the wall is installed and the concrete is placed, and after the concrete is cured, the mold is removed and the scaffold is removed.

[0003]

In the conventional slab method as described above, since all of the slab method is carried out on site, the shoring, scaffolding,
Requires a lot of labor and time to assemble and dismantle the formwork,
There is a problem that the construction period is long and the construction cost is high.

Further, since all the work is done on site, there is a problem that it is difficult to carry out work management and quality control of the bar arrangement dimensions, and variations in strength occur.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for constructing a road floor slab that can shorten the construction period, improve the quality, and reduce the construction cost.

[0006]

In order to solve the above problems, the invention of claim 1 is a concrete wall balustrade in which a beam and a reinforcing bar are projected on one side of a lower portion and a bottom slab is provided on the lower surface, and a bottom slab. Prefabricated floor slabs with beams on top, install the above concrete wall rails and floor slabs on the main girder, arrange reinforcing bars on both bottom slabs, and then cast concrete on the bottom slabs It has been adopted.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

As shown in the figure, a concrete wall balustrade 1 and a floor slab 2 are used to construct a road slab, which are manufactured in advance in a factory or on-site yard and installed on the main girder 3.

In the concrete wall rail 1, a lattice beam 4 and a number of reinforcing bars 5 having a sufficient fixing length are protrudingly provided at a certain interval in the longitudinal direction on one side of a lower portion, and the lattice beam 4 and the reinforcing bar are further provided on the lower surface. 5 has a structure in which a bottom plate 6 of a metal panel protruding in the same direction as 5 is provided, and the bottom plate 6 is fixed to the lattice beam 4.

The floor slab 2 has a structure in which lattice beams 8 and flat bars 9 are alternately arranged and fixed on a metal plate bottom slab 7, and the bottom slab 6 of the concrete wall rail 1 and the floor slab 2
The bottom slabs 7 have substantially the same length in plan view, and the lattice beams 4 and 8 of the two slabs have the same arrangement interval.

As shown in FIGS. 2 (A) and 2 (B), the lattice beam 4 of the concrete railing 1 and the lattice beam 8 of the floor slab 2 slightly protrude from the ends of the bottom slabs 6 and 7, respectively. The end portions of 8 are joined together by a joint 10 in a state of abutting each other, and the concrete wall balustrade 1 and the floor slab 2 can be integrally lifted.
Immediately below the joint between the two lattice beams 4 and 8 is supported by the main beam 3.

Next, a method of constructing a floor slab will be described mainly using FIG. As shown in FIG. 4 (A), a horizontal support member 11 and a support 12 are installed on the main girder 3, and the concrete wall balustrade 1 and the floor slab 2 are lifted by a crane.
As shown in the figure, the lattice beam is placed on the main girder 3 so that the portion to be joined is located on the main girder 3, the lattice beams 4 and 8 are connected by the joint 10, and the lower part of the concrete wall rail 1 is supported by the support 12. Support in.

Concrete wall balustrade 1 and bottom slab 6 of floor slab 2,
In FIG. 7, as shown in FIG. 2 (A), its end rests on the upper surface of the main girder 3, and on the upper surface of the main girder 3, a dowel bar 13 for improving the bonding strength with concrete is set up in advance. ing.

In the construction of the road, the concrete wall balustrades 1 are arranged on both sides of the road, and a required number of floor slabs 2 are arranged between them. In this case, the lattice beams are coupled to each other.

As described above, after the concrete wall balustrade 1 and the floor slab 2 are installed on the main girder 3, the reinforcing bars 14 are laid on the bottom slabs 6 and 7.

As shown in FIGS. 3A to 3C, the reinforcing bar 14 supports the upper and lower force distribution bars 14a and 14a on the upper surfaces of the lattice beams 4 and 8 and the upper surface of the flat bar 9, respectively. By arranging the main bars 14b above and below the bars 14a, 14a, the accuracy of the arrangement height of the reinforcing bars 14 is significantly improved.

The lattice beams 4 and 8 are formed by connecting an angle member 15 and a flat bar 16 with a lattice 17 so that the distribution muscles 14a and 14a can be supported.

The end of the main reinforcing bar 14b of the reinforcing bar 14 is lap-connected to the reinforcing bar 5 projecting from the lower portion of the concrete wall rail 1 with a sufficient fixing length. If necessary, the ends of the distribution bars 14a are also connected to adjacent distribution bars and to the reinforcing bar 18 of the conventional floor slab.

After the reinforcing bars 14 are arranged, concrete is cast on the bottom slabs 6 and 7. If the bottom slabs 6 and 7 become the lower-side formwork and the horizontal support 11 and the support 12 are removed after the concrete has solidified, a road slab having the concrete wall rail 1 as shown in FIG. 4D is completed.

FIG. 4 (E) shows the joint structure of the adjacent concrete wall rail 1, and the partial forms 19 and 20 are applied to the inner and outer surfaces of the connection part of the concrete wall rail 1, so that the two forms 1 are joined.
Concrete may be cast after the reinforcing bar 21 is assembled between the reinforcing bars 9 and 20, and a dowel anchor may be provided in advance at the end of the concrete railing 1 in order to improve the connection strength.

[0021]

As described above, according to the present invention, a road floor slab can be constructed only by placing a concrete railing and a floor slab on a main girder and pouring concrete. There is no need for shoring and scaffolding between girders, so that construction costs can be reduced by greatly reducing labor and shortening the construction period, and a wooden formwork is not required.

Further, since the concrete wall railings and floor slabs are manufactured in factories and on-site yards, the quality is constant, and the use of lattice beams makes it easy to control the arrangement of the reinforcing bars, thereby enabling excellent quality control.

Further, the same type of construction as the conventional slab can be performed, and since the slab is a driven formwork, excellent extra strength can be obtained. It can be used not only for new slabs but also for widening works and remodeling works. It is available.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a construction method of the present invention.

FIG. 2 (A) is a vertical cross-sectional view showing a state of being installed on a main girder,
(B) is a plan view of the same.

FIG. 3A is a cross-sectional view showing a reinforcing bar arrangement state, and FIG.
Is an enlarged view showing a portion of a reinforcing bar and a lattice beam, and FIG.

4 (A) to 4 (E) are explanatory views showing a construction process of a floor slab.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete wall railing 2 Floor slab 3 Main girder 4,8 Lattice beam 5,14 Reinforcement 6,7 Bottom slab 10 Joint

Claims (1)

[Claims] 1. A concrete wall balustrade in which a beam and a reinforcing bar are projected on one side of a lower portion and a bottom slab is provided on the lower surface, and a floor slab provided with a beam on the bottom slab is manufactured in advance. A road slab construction method characterized by placing concrete on the bottom slab after installing it on the main girder and arranging the bottom slab on both sides.