JPH0472938B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a bendable PC board and a roof structure using the bendable PC board.

[Conventional technology]

In general, most precast concrete boards (hereinafter referred to as PC boards) used as roofing and wall materials are formed into a flat plate shape.

This type of PC board is exclusively used for flat roofs, walls, and floors, and cannot be used for curved parts such as arched roofs.

For this reason, the PC board used for curved parts has a certain curvature depending on the curvature of the curved part, and each time,
It needed to be specially molded. In addition, it was necessary to prepare various types of PC board molding forms depending on the curvature of the PC board.

Furthermore, curved PC boards are often difficult to handle due to their shape, such as bulky loads and poor transport efficiency, making it extremely difficult to construct tunnels such as snow shelters, which are often built in relatively mountainous areas. It was troublesome.

[Means for solving problems]

The bendable PC board of the first invention according to this application consists of a plurality of precast concrete pieces (hereinafter referred to as PC board).
PC pieces) are connected by inserting a plurality of flexible straight members through their central parts, and an elastic separator is interposed between adjacent PC pieces.

In addition, the second invention of this application is flexible.
A roof structure using PC boards consists of arch beams of truss structure placed at regular intervals in the front and back direction, and multiple arch beams on the inside and outside of these arch beams.
A deformable PC board is installed by connecting PC pieces by inserting a plurality of flexible straight members through their central parts, and interposing an elastic separator between adjacent PC pieces over the entire length. It is characterized by being constructed by.

〔Example〕

Hereinafter, the first invention will be explained with reference to an embodiment illustrating the bendable PC board 1. A bendable PC board 1 is made by arranging a plurality of elongated PC pieces 2, 2 with a slight gap in the width direction. At the same time, they are connected by inserting flexible straight members 3, 3 into the center thereof, and are further formed by interposing a stretchable separator 4 between the adjacent PC pieces 2, 2. .

A PC steel material such as a PC steel wire or a PC steel stranded wire or a reinforcing bar is used for the flexible straight member 3, and the flexible straight member 3 is inserted at regular intervals in the longitudinal direction of the PC pieces 2, 2. , both ends of which are fixed by adhesion to concrete or by fixing devices such as bolts. Further, the flexible straight member 3 may be of an unpond type that does not adhere to the PC piece 2.

The stretchable separator 4 is made of polymeric material such as synthetic rubber or synthetic resin, or asfult, and the stretchable separator 4 is interposed in the entire space between the PC pieces 2, and moreover, 2,
It is completely attached to the end of 2.

When the PC board 1 formed in this manner is bent with its longitudinal direction as an axis, the flexible straight member 3 bends and the elastic separator 4 expands and contracts, so that it can be curved with a predetermined curvature. .

Note that the curvature of PC board 1 after bending is that of PC piece 2.
size, PC piece 2 and elastic separator 4
It can be changed freely by changing the number of .

That is, in order to increase the curvature of the PC board 1 after deformation, it is necessary to make the PC piece 2 slightly smaller, increase the number of elastic separators 4, and further reduce the interval between the elastic separators 4, 4.

FIG. 4 shows a modification of the elastic separator 4.

Among the elastic separators 4, flexible straight members 3
The inner side (concave side) of the PC board 1 is made of a polymeric material, and the outer side (convex side) is made of a metal plate folded in half or a sheet 5 made of a polymeric material.

To mold the PC board 1, a conventional PC board molding frame for flat boards is used.

A necessary number of flexible straight members 3 such as PC steel wires and elastic separators 4 formed into plate shapes are installed in a PC board forming form, followed by filling with concrete and removing the mold after curing the concrete. Due to the necessary size
The PC board 1 can be molded.

In addition, instead of installing the elastic separator 4, a hard separator of the same shape and size as this is installed, and the hard separator is removed when installing the PC board, and the space created by removing the hard separator after installing the PC board. The bottom part can also be filled with a polymeric material, concrete, mortar, etc.

Next, the second invention will be described with reference to an embodiment shown in the drawings. The snow shelter 7 has a plurality of arch beams 6, 6 erected at regular intervals in the front and back direction, and a plurality of arch beams 6, 6 on the inside and outside. It is constructed by pasting together two bendable PC boards 1.

The arch beam 6 is assembled as a truss beam using steel materials and reinforcing bars, and furthermore, two beams 6 on the left and right are separated from the center.
It is assembled into two parts on the beams a and 6a. The two left and right beams 6a, 6a are joined at the ridge by a connecting plate 9 and a connecting bolt 8.

The bendable PC board 1 is placed along the outside and inside of the arch beam 6 while giving a constant curvature according to the curvature of the arch beam 6, and the mounting bracket 11 anchored to the surface of the bendable PC board 1 and the arch It is fixed to the arch beam 6 by bolting or welding the beam 6 to the arch beam 6. PC can be bent freely after installation
The surface of the board 1 is waterproofed and finished as usual.

9 and 10 show a modification of the present invention, in which reinforcing ribs 10 are provided at the left and right edges of the bendable PC board 1, which continue in the width direction of the PC board 1. In addition, FIG. 10 shows a roof and walls made of arch beams 6 and bendable PC boards 1 made of multiple layers to increase strength.

〔Effect of the invention〕

The present invention has the above configuration and has the following effects.

The bendable PC board of the first invention can be molded using a conventional PC board molding frame for flat plates, making it easy to mold and mass-produced.

Since it is usually in the form of a flat plate, it is extremely easy to transport, store, and handle.

Since it bends freely, it is easy to construct curved roofs, walls, and floors such as arched roofs.
Moreover, since the curvature can be changed freely, the entire construction can be done with one type of bendable PC board, making it extremely efficient.

Furthermore, since the roof structure of the second invention is constructed from arch beams of truss structure and bendable PC boards, it can be made lighter and can be protected from earthquakes and other disasters.

The construction of the walls and roof can be done by attaching one type of bendable PC board with a certain curvature according to the curvature of the arch beam, so the work can be done efficiently.
The construction period can be significantly shortened.

It is an economical structural material because the PC board is attached to the truss frame and used as a composite beam.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the first invention; Figure 1 is a perspective view of a bendable PC board;
Figures 3 and 4 are enlarged sectional views of the bendable PC board before and after deformation, and Figures 5 to 8 show embodiments of the second invention. A cross-sectional view of the snow shelter, Figure 6 is A in Figure 5.
- A cross-sectional view, Figures 7 and 8 are bendable PCs.
The enlarged sectional views, FIGS. 9 and 10, showing the joined state of the plate and the arch beam, show a modification of the second invention, and are sectional views taken along the line A--A in FIG. 5. 1...PC board, 2...PC piece, 3...flexible straight material, 4...stretchable separator.

Claims (1)

[Scope of Claims] 1 A plurality of PC pieces are connected by inserting a plurality of flexible straight members through their centers and are adjacent to each other.
A bendable PC board characterized by having an elastic separator interposed between the entire PC pieces. 2 Arch beams with a truss structure are erected at regular intervals in the front and back direction, and multiple PC pieces are connected to the inside and outside of the arch beams by inserting multiple flexible straight members into the center. and adjacent to each other
A roof structure using a bendable PC board, characterized in that a flexible PC board is attached between the PC pieces with an elastic separator interposed over the entire length of the PC board.