JPH08100534A - Roofing for construction of dam - Google Patents

Abstract

PURPOSE: To continue the work of constructing a dam even in rainfall or snowfall, and to shorten its construction period. CONSTITUTION: A plurality of supporting columns 12 are erected at regular intervals at a place where a dam is to be constructed, parallel to the longitudinal direction of the dam, and a rail part 13 is extended between the supporting columns 12, folowing which a roofing unit 11 is erected on the rail part 13. The roofing unit 11 is composed of a plurality of trucks 14 supported enabling travel onto the rail part 13, foldable roofs 15 supported leaving clearances at both sides, left and right, of these trucks 14, and extensible roofs 16 each put above the trucks 14. When it rains or snows, the upper part of a place where the dam is being constructed is covered with the foldable roofs 15 and the extensible roofs 16 of the roofing unit 11, and the work of constructing the dam is prevented from being discontinued owing to rainfall or snowfall.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dam-building roof used when constructing a dam which is formed across a river or a valley and stores river water or runoff in the upstream.

[0002]

2. Description of the Related Art Conventionally, rock fill dams, concrete gravity dams, dams constructed in rivers, valleys, etc.
Arch dam and earth dam are known. What is shown in FIG. 10 is a rock fill dam. This rock fill dam is provided with an impermeable layer 1 formed by compacting clay soil in the center thereof, and fine rocks and the like are provided on the upstream and downstream sides thereof. A rock fill layer 3 made of a plurality of rocks is provided via a filter layer 2 made of.

[0003]

By the way, the water blocking layer 1 of the rock fill dam is constructed by pressing the upper surface with rollers, but at the time of rain or snow, the upper surface of the water blocking layer 1 is exposed to rain water or snow. As a result, it softens and cannot be compacted by the roller. For this reason,
There was a problem that the construction work had to be interrupted until the construction site of the water shield layer 1 was dried to some extent, not to mention rain and snow, and the construction period was prolonged. It should be noted that the interruption of the construction work due to such rain and snow occurred not only in the rockfill dam but also in the construction of the concrete dam.

The present invention has been made in view of the above circumstances, and provides a roof for dam construction which enables construction work to be continued even during rainfall and snowfall and shortens the construction period. Is intended.

[0005]

In order to achieve the above object, a dam building roof according to a first aspect of the present invention is provided with a plurality of erected roofs at the dam construction site with intervals along the bank length direction. A pillar, a rail erected on the upper end of the pillar, a plurality of carriages movably supported in the longitudinal direction on the rail, and a plurality of roof plates rotatably connected to each other, and both ends Both side portions are rotatably supported by the trolley arranged at, and every other connecting portion of the roof plates is a foldable foldable roof supported by another trolley. .

A dam building roof according to a second aspect is the dam building roof according to the first aspect, wherein the folding roof is
It is characterized in that both sides of the trolley are supported with a gap therebetween, and an expandable and contractible roof that covers the upper part of the gap between the folding roofs is supported on the top of the trolley. The roof for dam construction according to claim 3 is the roof for dam construction according to claim 1 or 2, wherein the trucks provided at both ends are drive trucks that travel along the rails by the drive means. It is characterized by that.

A dam building roof according to a fourth aspect is the dam building roof according to the first, second or third aspect, wherein the truck is provided at one end and the other roof is provided at the other end. It is characterized in that a connecting means that can be connected to the provided cart is provided.

[0008]

According to the dam building roof of the first aspect, by expanding the folding roof at the time of rain / snow, the upper part of the building is covered, and the construction work at the time of rain / snow is possible. According to the dam building roof of the second aspect, since the folding roof is provided on both sides of the truck supported by the rails, the range of construction work possible during rain / snow is widened. Further, since the upper part of the gap between the folding roofs is covered by the stretch roof, it is possible to prevent rain and snow from entering through the gap. Further, the wind blown up from below passes through the gap, and the folding roof is prevented from being damaged by the wind blown up.

According to the roof for constructing a dam according to claim 3,
The position of the roof is easily moved by causing the drive carriage to travel by the drive means. The folding roof is folded or stretched by moving these driving carriages by driving means so as to approach or separate from each other. According to the dam building roof of the fourth aspect, it is possible to cover the building site in a wide range by connecting the roofs by the connecting means.

[0010]

EXAMPLES Examples of the dam building roof of the present invention will be described below with reference to the drawings. In the present embodiment, the rock fill dam described above will be described as an example of a dam to be constructed. 1 and 2, reference numeral 10 is a roof for constructing a dam. The dam-building roof 10 includes a plurality of pillars 1 made of H steel or the like and erected at intervals in the dam length direction.
2, a rail 13 hung over the upper ends of the columns 12 by fixing them with bolts and nuts, and a roof unit 11 installed on the rail 13. The roof unit 11 is the rail 1
3, a plurality of carriages 14 movably supported on the carriage 3, a folding roof 15 supported on both left and right side portions of the carriages 14 with a gap therebetween, and an expandable roof 16 suspended on the upper portion of the carriage 14.
It is composed of and.

As shown in FIG. 3, the carriage 14 includes a carriage main body 21 and a support base 2 provided on the top of the carriage main body 21.
The carriage main body 21 is formed in a U shape and is installed in a state of being fitted into the rail 13. The trolley body 21 has traveling wheels 23 that roll while making contact with the upper surface of the rail 13, and guide wheels 24 that roll while holding the rail 13 from both sides.

Further, a support bar 22 fixed to the upper part of the carriage main body 21 is provided with a support bar 17 standing upright on the support bar 22, and the support bar 17 is provided with a support plate 18 having a curved shape. The expandable roof 16 is fixed. The folding roof 15 that constitutes the roof unit 11 is composed of a plurality of roof plate parts 25 formed in a plate shape and a connecting part 26 made of a soft material that connects the side parts of the roof plate parts 25. The roof plate parts 25 are bent at the connection points of the connection parts 26.

In this folding roof 15, among the connecting portions by the connecting portion 26, every other connecting portion from the both sides is a supporting portion with the support base 22 of the trolley 14, and both side portions are also the trolley. It is a supporting point for the support base 22 of 14. The folding roof 15 is rotatably supported by the shaft member 27 extending obliquely downward from the support base 22 at the support position. Also, this folding roof 15
The other end of the wire 28 fixed to a predetermined place on the ground by an anchor or the like is fixed to the other end of the wire 28. By applying a predetermined tension to these wires 28, the folding roof 15 is surely supported. It has become. Also,
The expandable roof 16 is made of, for example, a flexible bellows-shaped sheet such as vinyl, and is expandable. The expandable roof 16 covers the space above the gaps between the folding roofs 15. Has become.

Of the plurality of carriages 14 supporting the folding roof 15 and the expandable roof 16, the carriages 14 provided at both ends are provided with a drive motor (driving means) (not shown) for rotating the traveling wheels 23. It is assumed that the trolley is driven by a drive motor.
The traveling wheels 23 are rotated to travel on the rails 13. The entire roof unit 11 is moved by causing the carriages 14 provided with the drive motors at both ends to travel in the same direction. In addition, by moving the trolleys 14 toward each other, as shown in FIG. 4, the folding roof 15 is bent and folded at its connecting portion, and the expandable roof 16 is contracted, which is the opposite. By moving the carriages 14 away from each other, the folded folding roof 15 is unfolded and the expandable roof 16 is extended.

Further, each roof unit 11 is provided with a not-shown electromagnet (coupling means) on a carriage 14 provided on side portions facing each other. That is, the roof units 11 are made to travel and the carts 14 facing each other are provided.
By operating the electromagnets in a state where they are in contact with each other, the contacted carts 14 are attracted to each other, and as shown in FIG. 5, the roof units 11 are connected to each other to form one large roof. It has become so.

Next, a case of constructing a dam using the dam construction roof 10 having the above-mentioned structure will be described along with the construction procedure. (1) First, as shown in FIG. 6, a plurality of columns 12 are erected at predetermined intervals along the bank length direction of the dam to be constructed. (2) Next, as shown in FIG. 7, a rail 13 is stretched over the upper ends of the upright columns 12, and the rails 13 are fixed to the upper ends of the columns 12 by bolts and nuts. . (3) The trolley 14 provided with the folding roof 15 and the expandable roof 16 is supported by the rail 13 that is spanned, and the roof unit 11 is installed as shown in FIG.

(4) A wire 28 is fixed to the end of the folding roof 15 of the roof unit 11 installed on the rail 13, and the other end of the wire 28 is fixed to a predetermined portion of the ground by an anchor to make it tense. . (5) After the roof unit 11 is completed as described above, dam construction work is performed at a construction site on the lower side of the roof unit 11. Here, if rain or snow starts during the construction work of this dam, the trolleys 14 of the roof unit 11 provided with the drive motors are made to run in a direction in which they are separated from each other, and the foldable roof 1 of these roof units 11 is moved.
5 and the expandable roof 16 are expanded to cover the upper part of the construction site.

In this way, the roof unit 11
The folding roof 15 and the expandable roof 16 protect the construction site from rain and snow, and prevent the construction work from being interrupted by rain and snow. Specifically, on the upper surface side of the water shield layer 1 of the rock fill dam, weakening due to rain and snow is prevented, and the compaction work by the rollers can be continued. (6) After constructing the dam to a predetermined height, remove the roof unit 11 that has been installed from the rails 13,
Remove the rail 13 from the upper end of 2. (7) After that, as shown in FIG. 9, the support column 12 is further connected to the upper end of the support column 12, and the rail 13 can be hung over the upper end of the connected support column 12. (8) After that, the above steps (3) to (7) are repeated to construct a dam of the required height. When performing the above-mentioned work, the bank length of the dam becomes longer as the dam to be constructed becomes higher. Therefore, the rail 13 spanning the support columns 12 is replenished each time to make it longer. In addition, prop 1
2 buried in the dam.

As described above, according to the dam building roof 10 of the above-described embodiment, for example, even if rain or snow falls during the dam construction work, the roof unit 1 is located above the construction site.
Since it can be covered with the folding roof 15 and the expandable roof 16 of No. 1, it is possible to avoid interruption of the construction work due to rain and snow, and to shorten the construction period. Also, in fine weather or the like, by moving the carriages 14 provided with the drive motors in the directions in which they approach each other, the folding roof 15 can be folded and the telescopic roof 16 can be contracted. In other words, the folding roof 15 only when needed
And the roof 16 can cover the upper part of the construction site. Further, since the gap is provided between the folding roofs 15, the wind blown up from below can be passed through the gap between the folding roofs 15 to prevent the blowing roof from damaging the folding roof 15 or its supporting portion. can do.

Further, the carriages 14 on both ends are driven by a drive motor.
It is extremely easy to drive the roof unit 1
1 can be moved according to the construction work site, and the trolleys 15 can be moved very easily by moving these trolleys 14 in the directions in which they approach and separate from each other.
The retractable roof 16 can be stored and stretched. In addition, since the roof units 11 can be connected to each other to form one large roof by the electromagnets provided on the carriages 14 at the ends of the roof units 11 that face each other, the construction range can be wide. , It is possible to reliably cover the upper part of this construction site.

In the above embodiment, the dam to be constructed has been described by taking the rock fill dam composed of the water blocking layer 1, the filter layer 2 and the rock fill layer 3 as an example.
The dam-building roof of this embodiment is not limited to a rockfill dam, but is of course effective when building any dam such as a concrete gravity dam, an arch dam, and an earth dam.

[0022]

As described above, according to the dam construction roof of the present invention, the following effects can be obtained. According to the roof for dam construction according to the first aspect, by expanding the folding roof at the time of rain / snow, it is possible to cover the upper part of the construction site very easily and to enable construction work at the time of rain / snow. As a result, it is possible to build a rockfill dam with a water-impervious layer made of clay-like soil, which requires construction to be interrupted due to rain, snow, etc., without interrupting the work, thus shortening the construction period. Can be realized.

According to the dam building roof of claim 2,
Since the folding roof is provided on both sides of the bogie supported by the rails, it is possible to widen the range of construction work that is possible during rainfall and snowfall, and to perform construction work smoothly. Further, since the upper part between the folding roofs is also covered by the stretch roof, it is possible to prevent rain and snow from entering between the folding roofs.
Further, since the gap is provided between the folding roofs, the wind blown from below can be passed through the gap between the folding roofs, and the folding winds can be prevented from being damaged. According to the dam building roof of claim 3, the position of the roof can be easily moved by causing the drive carriage to travel by the drive means, and these drive carriages can be moved by the drive means to approach or approach. By separating them from each other, the folding roof can be easily folded or stretched.

According to the dam construction roof of claim 4,
By connecting the roofs by the connecting means, the upper part of the building site can be covered over a wide range, and the building work can be performed over a wide range during rainfall or snowfall.

[Brief description of drawings]

FIG. 1 is a perspective view of a rock fill dam construction site for explaining the configuration and structure of a dam construction roof of the present invention.

FIG. 2 is a front view of a rock fill dam construction site for explaining the configuration and structure of the dam construction roof of the present invention.

FIG. 3 is a cross-sectional view of a roof unit for explaining the configuration and structure of the dam building roof of the present invention.

FIG. 4 is a perspective view of a rock fill dam construction site for explaining the movement of the dam construction roof of the present invention.

FIG. 5 is a schematic front view of a rock fill dam construction site for explaining an example of use of the dam construction roof of the present invention.

FIG. 6 is a schematic front view of a construction site of a rockfill dam for explaining the construction work using the dam construction roof of the present invention for each work process.

FIG. 7 is a schematic front view of a construction site of a rockfill dam for explaining the construction work using the dam construction roof of the present invention for each work process.

FIG. 8 is a schematic front view of a construction site of a rockfill dam explaining the construction work using the dam construction roof of the present invention for each work process.

FIG. 9 is a schematic front view of a construction site of a rockfill dam explaining the construction work using the dam construction roof of the present invention for each work process.

FIG. 10 is a cross-sectional view of a rock fill dam for explaining the structure and structure of the rock fill dam.

[Explanation of symbols]

 10 Roof for dam construction 11 Roof unit 12 Struts 13 Rails 14 Bogie 15 Folding roof 16 Flexible roof 25 Roof plate part

Claims (4)

[Claims] 1. A plurality of struts that are erected at intervals in the dam length direction along the bank length direction, a rail erected on the upper end of the struts, and a longitudinal direction on the rail. A plurality of carriages that are movably supported and a plurality of roof boards that are rotatably connected to each other, and both sides are rotatably supported by the carriages that are arranged at both ends, and the roof boards are connected to each other. A roof for constructing a dam, which comprises a foldable foldable roof supported by the dolly at every other position. 2. The folding roof is supported on both sides of the trolley with a gap therebetween, and an extensible telescopic roof covering an upper portion of the gap between the folding roofs is supported on an upper portion of the trolley. The roof for dam construction according to claim 1, wherein: 3. The dam building roof according to claim 1 or 2, wherein the bogies provided on both end sides are drive bogies that travel along the rails by the drive means. 4. The trolley provided at the end is provided with a coupling means capable of coupling with a trolley provided at the end of another roof. Or the roof for dam construction according to claim 3.