JPH0230493Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a prefabricated PC shelter that is built on roads for snow protection, wind protection, etc.

[Problems to be solved by conventional technology and ideas] Conventional shelters are known to be made of steel, but this is complicated and takes a long time to construct, which increases construction costs and is subject to severe corrosion. The reality is that a large amount of money must be spent on repairs.

Therefore, the object of the present invention is to provide a shelter that can be easily erected without blocking traffic, has excellent durability, and is aesthetically pleasing.

[Means for Solving the Problems] The present invention includes a large number of split arch unit plates with intersecting small beams protruding from the outside, and forms an arch structure with the split arch unit plates. A large number of divided arch-shaped unit plates in the longitudinal direction are tied together using PC steel members for horizontal tightening that pass through the small beams in the longitudinal direction, and cross-shaped small beams are provided on the outer surface of the arch structure to make the inner surface almost flat. It is something.

[Example] Next, embodiments will be described with reference to the accompanying drawings.

As shown in Figures 1 to 3, a large number of split arch unit plates 1 with an arch shape formed of high-strength concrete are manufactured in a factory and provided, and the arch structure 2 is constructed on-site using the split arch unit plates 1. A large number of divided arch-shaped unit plates 1 are formed in parallel in the longitudinal direction of the arch-shaped structure 2, and a plurality of horizontally tightening PC steel members 3 are arranged at intervals, for example, unbonded PC steel bars. We are closely tied together. Further, small beams 4, 4a in the curved direction and in the straight direction are formed on the outer surface side of the split arch-shaped unit plate 1 so that the small beams 4, 4a in the curved direction and the straight direction intersect, and the inner surface side is made into a substantially flat part 5, and some of the small beams 4 in the linear direction
The PC steel material 3 penetrates through a. In addition, PC steel material 3
showed unbonded PC steel coated with asphalt or tar to prevent adhesion between prestressed concrete steel and concrete, but post-tensioned PC steel using a sheath may also be used. Further, the divided arch-shaped unit plate 1 may be formed of high-strength concrete containing fiber material. The lower end 6 of the split arch unit plate 1 is embedded and fixed in the foundation 7, and the upper end abutting portion 8 is tightly fastened by a fastening member 9 such as a bolt or nut. Note that the divided arch-shaped unit plate 1 has a large number of window holes 10 scattered therein, and each window hole 10 can be assembled from the outside or the inside using appropriate means such as a fastening member or a fitting member. A transparent or semi-transparent decorative board 11 such as a resin board is attached to form a lighting window 12 that allows sunlight to enter. 1 in the diagram
Reference numeral 3 denotes a flange portion provided at the lower part of one abutting end of the split arch unit plate 1.

In the embodiment described above, the arch structure 2 is formed by the arch-shaped split arch unit plate 1 made of high-strength concrete.
A large number of split arch-shaped unit plates 1 in the length direction are tied together by PC steel members 3 for horizontal tightening, and small beams 4, 4a in the curved direction and the straight direction are intersected on the outer surface side of the split arch-shaped unit plate 1. Since it is formed protrudingly, a large load capacity can be obtained. In other words,
As shown in Figure 4, when a large load is applied to the arch structure due to snow, falling rocks, etc., tensile stress is generated in the circumferential small beams 4 as shown by the arrows, and the small beams protrude outward. 4, sufficient strength can be exerted, and even if a crack were to occur, the crack would occur first in the 4 parts of the thick-walled small beams, and thus the crack would penetrate through the split arch unit plate 1. This can be prevented. On the other hand, in the case where the small beams protrude from the inner surface of the arch structure and the outer surface is flat, if a large load is applied to the arch structure and a crack occurs, the crack will be replaced by the split arch unit plate. Since the crack occurs in a thin part without a small beam, it becomes a through crack and is easily destroyed, which is dangerous, but the present invention solves this problem and is highly safe. In addition, it is a lightweight prefabricated concrete shelter that can be easily erected on site without blocking traffic, and maintenance and repair costs can be reduced.Moreover, a large number of divided arch-shaped unit plates 1 can be tied together using the PC steel material 3 for horizontal tightening. Since the structure 2 can be constructed, it becomes sturdy, and since the inner surface is flat, the aesthetically flat part 5 can be seen in the driver's field of view, making it easier to drive, and the lighting window 12 makes the premises brighter. In addition, since the small beams 4 and 4a are on the outside surface, it becomes easy to install and tighten the horizontal tightening PC steel material 3.

[Effects of the device] As mentioned above, this device is equipped with a large number of divided arch-shaped unit plates with intersecting small beams projecting from the outside, and the divided arch-shaped unit plates form an arch shape, and the length of the arch shape is increased. For horizontal tightening of multiple split arch unit plates in the longitudinal direction through the small beams in the longitudinal direction.
It is made of prestressed steel and has cross-shaped small beams on the outer surface of the arch structure, making the inner surface almost flat, so it has a large load capacity due to the small beams protruding from the outer surface of the arch structure. Since it is a prefabricated concrete shelter that can prevent penetration cracks, is highly safe, and is lightweight, it can be easily assembled and erected on site without blocking traffic, and there is no need to worry about corrosion, which saves a lot of money in the past. The required maintenance and repair costs can be reduced, and the arch structure can be easily and robustly erected by being tied together with longitudinal prestressing steel. In addition, the driver can drive while viewing the aesthetically flat area, making it easier to operate the vehicle.

[Brief explanation of the drawing]

FIG. 1 is an overall sectional view, FIG. 2 is a plan view, FIG. 3 is a sectional view of a main part, and FIG. 4 is an explanatory diagram showing tensile stress. 1... Divided arch-shaped unit plate, 2... Arch-shaped structure, 3... PC steel material for horizontal tightening, 4, 4a... Small beam,
5... Flat area.

Claims (1)

[Scope of utility model registration request] It is equipped with a large number of split arch unit plates with intersecting small beams protruding from the outside, the split arch unit plates form an arch structure, and a large number of split arch unit plates are arranged in the length direction of the arch shape. It is tightened by a PC steel material for horizontal tightening passing through the small beam in the length direction,
A prefabricated PC shelter that features an arched structure with intersecting beams on the outside and an almost flat inside.