JPH0280703A - Load-relieving structure for snowshed and rockshed - Google Patents

Abstract

PURPOSE:To contrive relieving of load by laying lightweight expended material or honeycomb structured material having water tightness and shock absorptivity over the rooftop in a way that the material is inclined toward the valley-side and by making collapsed mountain snow or earth slip off. CONSTITUTION:At construction of a snowshed 10, its roof 12 is made to be inclining toward the valley-side. Then blocks 18 made of foamed polystyrene or the like are laid over the rooftop 16 so that they are inclined toward the valley-side 14. Earth 20 are then overlaid to the blocks 18 to protect the surface of the blocks 18. Impact load applied by snow or the like collapsing on to the snowshed 10 is absorbed by the layer of the blocks 18 and, at the same time, the collapsed snow or the like are made to slip off to the valley-side 14. Therefore, the impact load can be relieved while simplification of the structure and reduction of the construction cost are achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a load-reducing structure for snow sheds and rock sheds.

(Prior Art) A cave called a snow shed or rock shed is used to prevent damage caused by avalanches and landslides to roads set up in exhibition areas.

Figure 3 shows a conventional snow shed. In the conventional snow shed 100, the roof 102 is sloped toward the valley 104 so that dirt 108 or snow that is about to accumulate on the roof 106 slides down toward the valley 104.

On the other hand, in the conventional rock shed, as shown in Fig. 4, earth and sand 202 are laid in advance on the roof 200 to a depth of, for example, 90 cm, and the impact of falling earth and sand 204 and rocks is absorbed. ing.

(Problems to be Solved by the Invention) However, the above-mentioned conventional snow shed and Rock Shed have the following problems.

Both the conventional snow shed 100 and the rock shed 206 cannot avoid the accumulation of earth and sand 108.204 on the rooftop 106.200. Therefore, it is necessary to remove the earth and sand 10B and 2c4 that have accumulated on the rooftop 106.200, but this cannot be done frequently, and it is common to increase the load capacity of the snow shed 100 and rock shed 206 themselves. This, combined with the need for impact resistance against impact loads, poses the problem of increased construction costs.

Therefore, an object of the present invention is to provide a load-reducing structure for snow sheds and rock sheds that can prevent the accumulation of earth and sand on rooftops and suppress construction costs.

(Means for solving problems) In order to solve the above problems, the present invention has the following configuration.

In other words, it is characterized by having a lightweight, watertight, and cushioning foam or honeycomb structure installed on the roof.
Alternatively, it is characterized by a lightweight, watertight, cushioning foam or honeycomb structure laid on the roof so as to slope toward the valley.

(effect) The effect will be explained.

By laying a lightweight, watertight, cushioning foam or honeycomb structure on the roof, it is possible to absorb the impact of avalanches and falling earth and sand, making the impact resistance of snow sheds and rock sheds better than conventional ones. Can be made larger. Furthermore, if the foam or honeycomb structure is laid on the rooftop with an inclination toward the valley side, fallen snow and mountain sand can slide down without accumulating on the rooftop, making it possible to reduce the load.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, the case of a snow shed will be explained with reference to FIG.

When installing the snow shed 1O, the roof 12 is sloped downward toward the valley 14 side.

Next, styrofoam blocks 18 are laid on the rooftop 16. This block 18 is also provided so as to be inclined downward toward the valley 14 side.

The angle of inclination is adjusted to be slightly shallower than the expected deposition angle at which earth and sand are expected to accumulate on the rooftop 16.

Earth and sand 20 is laid on the upper layer of the Styrofoam block 18 to protect the surface of the Styrofoam block 18, and the overall inclination angle A is equal to or larger than the expected accumulation angle.

When the snow shed 10 is formed with such a structure, when snow falls onto the snow shed 10, the impact load is absorbed by the 18 layers of styrofoam blocks. Further, since the inclination angle A is larger than the expected deposition angle, the snow and fallen soil that have fallen onto the roof of the earth and sand 20 are not deposited on the earth and sand 20 and slide down to the valley 14 side.

On the other hand, a lock shed 50 is shown in FIG.

Its structure is similar to Snow Shed, Rock Shed 50
Styrofoam blocks 56 are laid on the rooftop 52 of the building so as to be inclined downward toward the valley 54 side. but,
There is no need to put buffering earth and sand on the roof 52 as in the past. The inclination angle of the block 56 layer is also formed at a slightly shallower angle than the expected accumulation angle of the collapsed earth and sand.

Next, earth and sand 58, rubber plates, etc. are laid on top of the block 56m, and the overall inclination angle B is formed to be larger than the expected accumulation angle. Like the snow shed described above, the rock shed 50 also has this structure, so that it is possible to absorb the impact load of falling rocks and collapsed earth, and
It becomes possible to prevent fallen earth and sand from accumulating on the rooftop 52.

As another example, polystyrene foam may be laid on the rooftop without considering the angle of inclination, simply to reduce the impact load of snow or falling earth and sand. In this case, to prevent the Styrofoam from deteriorating, earth and sand may be laid on the top surface of the foamed steel layer, or instead of earth and sand, a protective film may be formed on the surface layer of the Styrofoam with paint, etc., or as appropriate. It may be covered with a protective member.

In addition, even in the example where the inclination angles A and B are larger than the expected accumulation angle, if a layer of 20.58 of earth and sand is not provided, the inclination angle of the Styrofoam is made larger than the expected accumulation angle, and the surface of the Styrofoam is protected with paint or a protective material. You can.

In addition, in the above example, we gave an example of laying styrofoam blocks, but materials suitable for use as blocks are lightweight, air/water tight, heat insulating, chemical resistant, self-extinguishing, and cushioning. For example, foams such as styrene foam, urethane foam, polyethylene foam, sponge rubber foam, silicone foam, and vinyl chloride foam, and honeycomb structures are preferable.

Although various preferred embodiments of the present invention have been described above, the present invention is not limited to the above-mentioned embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. be.

(Effect of the invention) By using the load-reducing structure for snow sheds and rock sheds of the present invention, it is possible to reduce the impact load of snow and falling earth applied to the roof, so that the snow shed and rock shed have the required impact resistance. It is possible to increase the efficiency, simplify the structure and reduce the construction cost, and also reduce the cost of the accompanying foundation structure.

In addition, since there is no need to put heavy buffering earth and sand in the mouth/tsukushien end, the effort and load-bearing structure can be saved (which makes it even more economical).

If the structure of claim 2 is adopted, the earth and sand etc. will not accumulate on the roof of the snow shed and the rock shed, so the troublesome effort of removing the accumulated earth and sand can be saved, and there is no need to consider the load of the accumulated earth and sand. It is possible to increase the load capacity of the rock shed, and for example, the thickness of the roof and the thickness of the pillars can be made thinner and thinner, resulting in significant reductions in construction costs.

[Brief explanation of the drawing]

FIG. 1 is a side view of a snow shed according to the present invention, FIG. 2 is a side view of a rock shed according to the present invention, FIG. 3 is a side view of a conventional snow shed, and FIG. 4 is a side view of a conventional rock shed. 10... Snow shed, 12... Roof, 16... Rooftop, 18... Styrofoam block, 20... Sediment, 50... Rock shed, 52...
... Rooftop, 56... Styrofoam block, 5
8... Earth and sand.

Claims (1)

[Claims] 1. A load-reducing structure for snow sheds and rock sheds, which is characterized by having a lightweight, watertight, and cushioning foam or honeycomb structure installed on the roof. 2. A load-reducing structure for snow sheds and rock sheds, which is characterized by a lightweight, watertight, and cushioning foam or honeycomb structure installed on the roof so as to slope toward the valley.