JP2735000B2 - Protective shed - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective shed for protecting a road or a railway track between a mountain and a valley or the sea from falling rocks, landslides, avalanches, and the like.

[0002]

2. Description of the Related Art In general, a structure of this type is constructed by supporting a roof with a support, and a structure made of steel and concrete made of PC and RC is known. For example, concrete shed is Japanese Utility Model Publication No. 1-4895,
As disclosed in Japanese Patent Publication No. 1-2722, etc.,
The main girder, which is a plurality of concrete walls, is integrally connected to the road or track in the longitudinal direction by PC steel for horizontal tightening to form a roof, and both sides of the roof in the road or track direction are rigidly connected to columns or walls. It is configured. The main girder structure is known to have a T-shaped cross-section or an arch-shaped cross-section, and the main girder support structure supports both sides of the main girder with a main column and a child column, or a retaining wall. Various types are known, such as one supported by a main pillar or a retaining wall. A concrete keeper, which is a protection structure of this kind, is disclosed in Japanese Utility Model Laid-Open Publication No. Sho 62-196220 and Japanese Patent Publication No. 1-244003.
As is known in Japanese Patent Application Publication No. H10-163, a roof is formed by integrally joining a plurality of concrete wall bodies with a PC steel for lateral tightening facing the road or track length direction, and the roof is formed in the road or track direction. It is configured to be installed diagonally on the mountain side, and as the roof support structure, there are known a structure in which the roof is fixed to the substructure and the pillar, and a structure in which the roof is fixed to the substructure and the wall of the mountain.

[0003] In these various protective structures made of steel or concrete, a buffer structure is provided on the roof for the purpose of alleviating the impact force caused by falling rocks and the like. In FIG. 1 of JP-A-18305, etc., a sand cushion material made of earth and sand is laid on a roof, and the sand cushion material is piled up by inclining downward at an angle of about the angle of repose toward a valley or the sea. An avalanche protection structure has been proposed.
In the publication No. -80703, a styrofoam block is laid on the rooftop, and this block is provided so as to be inclined downward to the valley side (column 3, lines 15 to 17). A rock shed has been proposed in which earth and sand for protecting the surface are laid (column 5, lines 1 to 3) to make the overall inclination angle approximately the repose angle.

[0004]

In the case of using a sand cushion material such as the above-mentioned rock fall avalanche protection structure, the sand cushion material is rested toward a valley or the sea in order to obtain a sufficient buffering effect against large rock fall. The piles were piled up at an angle about the angle, but this required a huge amount of sand cushion material to be piled up on the roof, increasing the dead load and making the structure itself stronger. However, as a result, there were problems that the construction cost increased and the construction cost was prolonged. In the case of laying the sand cushion material in this way, if the roof edge of the roof is close to the ground, the sand cushion material may be laid almost only at the upper part of the roof. There is a problem in that if the is located away from the ground, an enormous amount of sand cushion material must be backed between the ground and the ground, as well as on the roof.

On the other hand, in the above-mentioned rock shed, the dead load applied to the rock shed can be reduced by using the styrofoam block. However, the styrofoam provided on the roof cannot withstand long-term use when exposed to ultraviolet rays, so the earth and sand must be laid as protection for it. And, since the entire inclination angle is formed to be approximately the angle of repose, the laid earth and sand flows down or scatters due to the effect of rain and wind, and as a result, there is a problem that the Styrofoam exposed to ultraviolet rays is deteriorated early. In order to prevent this, if the earth and sand are laid regularly, maintenance becomes complicated, and if a concrete layer or the like is provided as a protective material for the styrofoam, there is a problem that the cost and steps increase. Also, if the ground edge of the roof is far from the ground, a huge amount of styrofoam blocks or earth and sand must be backed between the roof and the ground edge of the roof and the ground. However, there is a problem that the construction is complicated and the construction cost is increased.

Accordingly, an object of the present invention is to provide a protective shed which is easy to construct and has an excellent effect of buffering an impact force.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a protective shed having a roof supported by a support and covering the entire width of a road or railroad track provided between a mountain and a valley or the sea. A sloped roof is provided on the roof, the portion of which is inclined downward from the ground side toward the valley or the sea side at an angle of repose of about or greater than the angle of repose, and the ground side of the sloped roof is the ground side or the ground side of the roof. It is supported by an upper support standing upright on the support.

[0008]

By adopting the above construction, falling rocks, landslides and avalanches falling on the roof fall into the valley or the sea along the upper surface of the sloped roof from the ground side to the valley or the sea side. In addition, when the sloped roof receives an impact force exceeding its strength due to rock fall or the like, the sloped roof is broken, and a part of the impact force of the rock fall is absorbed. In addition, since the sloped roof forms a slope of the angle of repose or more, even soil and the like that relatively slowly falls on the sloped roof also falls along the sloped surface to the valley or the sea side. In addition, by covering the ground between the ground and the ground with a sloped roof, falling rocks, etc., falling on this part can fall into the valley or the sea. By covering the area with the mountain, construction such as backfilling at this portion becomes unnecessary.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 and 2 show a first embodiment of the present invention,
In this figure, in this example, a concrete shed having a shock-absorbing structure on a roof is shown, and a plurality of main girders 1 are connected to a road M as a road or a PC steel material 2 for lateral tightening directed in the longitudinal direction of the track. Ties together and roof 3 along the ground Y
The main girder 1 has a T-shaped cross-section in which a road M or a web 1B in the track width direction is integrally provided at the lower center of a flat top plate 1A. A tension is applied by a pretension method by the PC steel material 4 facing in the track width direction, and both sides of the roof 3 in the road M or the track direction are placed on the pillars 5 and the walls 6 as the support for vertical tightening. The shed is rigidly integrated with the steel member 7.
The roof 3 is inclined downward toward the valley T or toward the sea.

[0010] The impact force buffering structure is provided on the ground Y side of the roof 3,
A ground support 8 serving as an upper support made of steel or concrete is erected, and a plurality of the ground support 8 are provided at equal intervals in the longitudinal direction of the road M or the track.
Are erected integrally on the upper surface 3U of the roof 3. Also, a plurality of roof slabs 9 made of precast concrete, glass fiber reinforced concrete (GRC), or steel and having a width in the length direction of the road M equal to the main girder 1 are formed. An inclined roof 11 is formed by integrally tightening the PC steel 10 for horizontal tightening, and the precast concrete roof slab 9 is pretensioned by a PC steel 12 facing the road M or the track width direction. The ground Y side of the sloping roof 11 is fixed to the upper part of the ground support 8 by a fixture 13 such as an anchor, and the valley T side of the sloping roof 11 is set to the valley T side of the roof 3. It is fixed by a fixing device 14 such as an anchor, so that the upper end of the roof 3 is inclined downward from the ground Y side toward the valley T or the sea side at an inclination of about the angle of repose or more. Constitute an oblique roof 11. Also,
As shown in FIG. 2, the abutting surface of the main girder 1 in the road direction.
Between 15, a road-direction abutting surface 16 of the roof slab 9 is arranged. Further, the roof slab 9 has an upper end extending toward the ground Y and an upper end abutting against the ground Y, thereby extending the upper end of the sloping roof 11 toward the ground Y, The ground-side extension 11A is constituted by the portion where the sloped roof 11 is extended, and the ground-side extension 11A forms an upper part of the ground-side space H between the ground Y and the ground Y of the roof 3. Is covered.

Next, the operation of the above construction will be described.
It falls on 11 and rolls or moves by the inclined surface of the inclined roof 11 and falls, and falls into the valley T or the sea.
Also, the sloping roof 11 uses a plurality of roof slabs 9 as side tightening PCs.
The roof slabs 9 are tension-integrated by the steel material 10 and each of the roof slabs 9 is provided with tension in the width direction of the road M by the PC steel material 12, so that the roof slabs 9 are excellent in strength, and also have a precast roof slab. 9 is assembled, so that the construction is also facilitated. On the other hand, sloping roof 11
When an impact force exceeding the strength is received, the sloped roof 11 is broken, so that a part of the impact force of the falling rock is absorbed and a large impact force is prevented from being applied to the roof 3.

As described above, in the present embodiment, the roof 3 covering the entire width of the road M or the railway track provided between the ground Y and the valley T or the sea is supported by the pillars 5 and the walls 6 as support members. In the protective shed, the upper end is located at the valley T from the ground Y side.
Alternatively, a sloped roof 11 is provided on the roof 3 and sloped downward at an angle of repose or more toward the sea side, and the sloped roof 11
Upper support 8 with 11 ground Y side standing on the ground side of roof 3
Rocks, landslides, and avalanches that fall on the roof 3 fall into the valley T or the sea along the upper surface of the sloping roof 11 from the ground Y side to the valley T or the sea side. Further, even when the sloping roof 11 receives an impact force exceeding its strength due to falling rocks or the like, the sloping roof 11 is broken, and a part of the impact force of the falling rocks is absorbed. The application of force is prevented, and the shock-absorbing effect of the shock is superior to that of the conventional protective shed.
Further, since the sloped roof 11 is provided on the roof 3 in a double manner, the construction becomes easier as compared with the conventional one in which the sand cushion material is piled up. Furthermore, by covering the ground-side space H between the ground Y side of the roof 3 and the ground Y by the ground-side extension 11A of the sloped roof 11, falling rocks and the like falling on the ground-side space H can be reduced. T can be dropped on the sea or the sea, and since the slope roof 11 covers the ground Y side edge of the roof 3 and the ground Y, construction such as backfilling in the ground side space H is unnecessary. And the workability is improved.

As an effect of the embodiment, the inclined roof 11
Is a roof slab 9 to which tension is applied in the width direction of the road M by a PC steel material 12 by being integrally tensioned by a PC steel material 10 for horizontal tightening. 9 is assembled, so that the workability is also excellent. In addition, the butt surface 16 of the roof slab 9 is arranged almost at the center of the butt surface 15 of the main girder 1, so that the butt surface 16 which is relatively inferior in strength to the roof slab 9 receives large rockfall. Even if it is destroyed, below it,
Since the central part in the road length direction of the main girder 1 that is different from the 15 abutment surfaces is located, it is possible to sufficiently withstand the impact force of the rock fall, and the lower surface of the main girder 1 in the road length direction central lower part is Since the web 1B is formed integrally, excellent strength against falling rocks can be obtained. Also, the ground side support 8
Is erected on the roof 3 at the position of the step 6A formed on the wall 6, so that an unreasonable load may be applied to the roof 3 unlike the roof 3 provided at the center position in the road width direction. Absent.

FIG. 3 shows a second embodiment of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. On the upper surface, a ground support 8 serving as an upper support is erected. The ground support 8 is erected in a direction orthogonal to the inclined roof 11 and a road M.
Alternatively, a plurality of uprights are erected at equal intervals in the longitudinal direction of the track, and each is supported by an upright column 8A erected on the upper surface of the wall 6. Is fixed to the side of the ground support 8.

As described above, in this embodiment, the roof 3 covering the entire width of the road M or the railway track provided between the ground Y and the valley T or the sea is supported by the pillars 5 and the walls 6 as the support. In the protective shed, the upper end is located at the valley T from the ground Y side.
Alternatively, a sloped roof 11 is provided on the roof 3 and sloped downward at an angle of repose or more toward the sea side, and the sloped roof 11
An upper support 8 with the ground Y side 11 standing on a wall 6 serving as a support
As in the first embodiment, the double roof structure of the roof 3 and the sloping roof 11 has the same operation and effect as in the first embodiment. The sloped roof 11 is supported by the ground-side support 8 erected in the building, and the sloped roof 11 can be firmly supported by a support structure combining the ground-side support 8 and the stay pillar 8A.

FIG. 4 shows a third embodiment of the present invention. The same parts as those in the first and second embodiments are denoted by the same reference numerals, and detailed description thereof is omitted. A support wall 17 serving as an upper support is integrally erected on the valley T side of the upper surface. By forming the upper support with the support wall 17 integrated with the wall 6 in this manner, the support on the ground side can be used. On a wall 6
The support wall 17 serving as the upper support can be provided upright. In this embodiment, the same operation and effect as those of the above embodiments are obtained.

FIG. 5 shows a fourth embodiment of the present invention, in which the same parts as those in the first, second and third embodiments are denoted by the same reference numerals, and the detailed description thereof will be omitted. An example in which the ground side space H is filled with a sand cushion material or a buffer backing material layer 18 formed by stacking a plurality of styrene foam blocks is shown. By providing the buffer backing material layer 18 in this manner, Ground-side extension 11 of sloping roof 11
Even if A receives a rock fall, the impact force can be reduced by the buffer backing material layer 18 and the rock fall is caused by the ground side extension 11A.
Without falling down to the valley T side.

As described above, this embodiment has the same operation and effects as those of the above-described embodiments. In this embodiment, the ground side space H
By providing the buffer backfill material layer 18 on the ground-side extension 11A, even if a falling rock impact force is applied to the ground-side extension 11A, it can be absorbed, and the rock falls below the ground-side extension 11A. In the case where styrofoam is used as the backing material, the support wall 17 and the ground-side extension 11A protect the styrofoam from ultraviolet rays and improve the durability of styrofoam. When a sand cushion material is used as the backfill material,
And the ground side extension 11A, that is, it is prevented from flowing down or scattering due to rain and wind, and a stable buffer structure can be obtained for a long period of time.
Since only a hollow space is required, the dead load is reduced and the construction becomes easier as compared with a conventional construction in which a sand cushion material is laid on a roof.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, a roof slab extending from the upper end side is placed in the road width direction on the ground-side support or support wall.
It is also possible to divide and assemble the PC steel material 12 by tension integration in the field by a post-tension method. In the embodiment, the valley side edge of the sloping roof is fixed to the valley side edge of the roof. However, the valley side edge of the sloping roof may be fixed to the roof upper surface at the upper position of the pillar 5. Further, as a support for the roof 3, a support may be configured by a pillar instead of the wall 6 on the ground side.

[0020]

According to the present invention, there is provided a protective shed having a roof which is provided between a ground and a valley or the sea and which covers the entire width of a road or a railroad track by a support, wherein an upper end portion of the shed is on the ground side. A sloping roof that slopes downward at an angle of repose or more toward the valley or sea side is provided on the roof, and the ground side of the sloping roof stands on the ground side or the ground side support of the roof. The protection shed, which is supported by the provided upper support, is easy to construct, and has an excellent cushioning effect on impact force.

[Brief description of the drawings]

FIG. 1 is a sectional view of a protective shed showing a first embodiment of the present invention.

FIG. 2 is a view taken along line AA of FIG. 1 showing the first embodiment of the present invention.

FIG. 3 is a sectional view of a protective shed showing a second embodiment of the present invention.

FIG. 4 is a sectional view of a protection shed showing a third embodiment of the present invention.

FIG. 5 is a sectional view of a protective shed showing a fourth embodiment of the present invention.

[Explanation of symbols]

 3 Roof 5 Pillar (support) 6 Wall (support) 8 Ground support (upper support) 11 Inclined roof 11A Ground extender 17 Support wall (upper support)

Claims (1)

(57) [Claims] Claims: 1. A protective shed having a roof supported by a support and covering a full width of a road or a railroad track provided between a ground and a valley or the sea, the upper end portion of which is located at the valley or the sea from the ground. An upper support having an inclined roof inclined downward at an inclination of about the angle of repose or more toward the side on the roof, and the ground side of the inclined roof standing on the ground side of the roof or a support on the ground side. A protective shed that is supported by the body.