JP2009249967A - Water passage repair plate, repair method for existing water passage, and repaired water passage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable easily repairing an existing water passage without taking labor and time even when the water passage is not completely dried. <P>SOLUTION: A water passage repair plate 11 comprises an FRPM panel 11a, a cushioning material 11b stuck to the panel back surface excepting the peripheral edge portion, and water-expansible portion so as to surround the cushioning material 11b. The cushioning material 11b and water-expansible rubber 11c sides of the repair plate 11 are closely contacted with the inner wall surface of the existing water passage 12, and the repair plates 11 are installed side by side in the lengthwise direction of a water passage so as to leave a space between them, and fixed by anchor bolts 13 to form a repaired water passage 10. The cushioning material 11b fills a space between the panel 11a and the existing water passage 12, and the water-expansible rubber absorbs water flowing into a space between the repair plates, thereby almost completely preventing water leakage. Unlike the case using a backfil material and a caulking material in a water passage repair plate, a curing time is not required at repair work, and labor for drying the inner wall surface of the existing water passage is not required. Therefore, shortening of a construction period and simplification of work can be achieved. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a water channel repair plate for repairing an existing water channel, a repair method for an existing water channel using the water channel repair plate, and a repair water channel in which the existing water channel is repaired with the water channel repair plate.

The existing concrete channel (opening) with the upper part open is prone to cracking due to aging due to climate and aging.
When cracks occur, the water in the water channel often leaks to the outside, so it is necessary to repair the old water channel as soon as possible.
As a repair method, a plurality of fiber reinforced synthetic resin water channel repair plates (FRP panel, FRPM panel, etc.) are prepared, and these are fixed in parallel along the inner wall surface of an aged existing water channel. ing.

By the way, when repairing with the water channel repair plate in this way, if there is a gap between the water channel repair plate and the inner wall surface of the existing water channel, water leakage cannot be prevented sufficiently, so various attempts to close this gap have been made. Has been made.
Specifically, it is conceivable to fill a gap between the water channel repair plate and the existing water channel with a backfill material such as mortar (Patent Document 1) or a caulking material (Patent Document 2).
JP-A-2005-290847 JP 2004-027587 A

However, when a backfill material is used for filling the gap, it takes a curing time until curing, and thus there is a problem that it cannot be repaired quickly.
In addition, when a caulking material is used for filling the gap, the inner wall surface of the existing water channel needs to be almost completely dried in order to exert its adhesiveness.
Therefore, it takes time and effort to dry the water channel, and the water channel is difficult to dry, especially in low temperature environments such as Hokkaido and Tohoku region.

  Therefore, a problem to be solved by the present invention is to make it possible to easily repair the existing water channel without taking time and effort even if the existing water channel is not completely dry.

  In order to solve the above-described problems, a water channel repair plate according to the present invention includes a panel made of fiber-reinforced synthetic resin, a cushioning material pasted on one surface of the panel leaving a panel peripheral edge, and the buffer peripheral edge. And a water-swelling rubber attached around the material.

Here, the panel made of fiber reinforced synthetic resin means both a single layer panel (FRP panel) made of fiber reinforced synthetic resin and a composite panel (FRPM panel etc.) in which a mortar layer is sandwiched between panels made of fiber reinforced synthetic resin. means.
The water-swelling rubber means a rubber and an elastomer having a property of absorbing and holding water to swell and is also called a water-swelling rubber.
This water-swelling rubber can be obtained, for example, by kneading a water-absorbing polymer into rubber as a base material, and appropriately performing a treatment such as vulcanization.
Furthermore, the existing water channel here includes not only the open channel described in the background art section but also underdrains.

The buffer material and the water swelling rubber side of the water channel repair plate are brought into close contact with the inner wall surface of the existing water channel, and are arranged and fixed along the existing water channel.
If it does in this way, since a buffer material fills up the crevice between a panel and an existing water channel, water leakage other than the peripheral part of a water channel repair board is prevented.
By the way, since a water channel repair board expands and contracts with temperature, when it arranges it in parallel, it is necessary to open the clearance gap for absorbing expansion / contraction between adjacent water channel repair boards.
Therefore, where there is a possibility that water may leak from the gap, the water swelling rubber in the peripheral portion of the water channel repair plate absorbs and holds such water, so that leakage at the peripheral portion of the repair plate is also prevented.

Since the buffer material is used for the water channel repair plate, unlike the case where the backfill material is used, no curing time is required at the time of repair work, and the construction period can be shortened.
In addition, unlike the case of using a caulking material, it is not necessary to dry the inner wall surface of the existing water channel, so that the construction period can be shortened and labor can be saved.
Since the cushioning material is deformed following the unevenness of the inner wall surface of the existing water channel, the gap between the panel and the inner wall surface is almost completely filled to prevent water leakage.

As such a buffer material, a closed-cell foamed resin or foamed rubber is preferable because it is inexpensive and lightweight, and also prevents water leakage because it does not pass water.
If the water channel repair plate is provided with an attachment hole penetrating in the thickness direction, the repair plate can be easily fixed to the existing water channel with an anchor bolt through the hole.

  Considering the present invention from a method viewpoint, the step of placing a plurality of the water channel repair plates in close contact with the inner wall surface of the existing water channel with the cushioning material and the water swelling rubber side, with a predetermined interval along the existing water channel It is understood that this is a method for repairing an existing water channel, including fixing each of the water channel repair plates to the opposing inner wall surface of the existing water channel.

The predetermined interval here is an interval for absorbing the expansion and contraction of the water channel repair plate accompanying the temperature change as described above, and in a normal environment, about 1 mm to several mm, and further about 1 mm to 2 mm. is there.
In addition, the water channel repair plate is not necessarily required to be completed when being arranged along the inner wall surface of the existing water channel.
That is, an unfinished water channel repair plate consisting only of a panel and a buffer material is fixed with the buffer material closely attached to the inner wall surface of the water channel, and then surrounding the buffer material so that the water swelling rubber is attached to the panel and the inner wall surface of the water channel. The water channel repair plate may be completed by filling in between.

  When considering this invention from the viewpoint of the entire repaired existing water channel, the buffer material and the water-swelling rubber side are brought into close contact with the existing water channel and the inner wall surface of the existing water channel, and are arranged in parallel with a predetermined interval along the existing water channel. It is understood that it is a repair water channel provided with the said water channel repair board installed and fixed.

  Alternatively, the existing water channel, a water channel repair plate that is arranged in parallel with the existing water channel at a predetermined interval, with the buffer material and the water-swelling rubber side in close contact with the inner wall surface of the existing water channel, and the water channel repair plate It is understood that this is a repair water channel provided with anchor bolts that are driven into the existing water channel through the attachment holes.

  This repair channel is provided with a joint material filled in the upper gap between the existing channel and the channel repair plate, so that the appearance when the channel is viewed from above is good, and further prevention of water leakage at the upper part of the channel is possible. This is also preferable.

  A cushioning material is affixed to one side of a panel made of fiber-reinforced synthetic resin, leaving a peripheral edge, and a water-swelling rubber is affixed around the cushioning material to form a water channel repair plate. Was fixed in close contact with the inner wall surface of the existing waterway.

  As a result, the buffer material and the water-swelling rubber prevent water leakage between the panel and the inner wall surface of the water channel, so that no curing time is required as in the case of using a backfilling material, and in the water channel as in the case of using a caulking material. Since the drying work is not necessary, it takes less time and the work period is shortened.

The repair water channel 10 according to the embodiment shown in FIGS. 1 to 4 is obtained by fixing the water channel repair plate 11 to the inner wall surface of an aged existing water channel 12 to prevent water leakage.
The existing water channel 12 is made of concrete, for example, and is an open channel having an open upper surface as illustrated.

As shown in FIG. 2, the water channel repair plate 11 is arranged in parallel in the length direction of the water channel on the bottom surface and both side surfaces which are the inner wall surfaces of the existing water channel 12.
And between each water channel repair board 11 adjacent to the length direction of a water channel, the space | interval S of about 1 mm-2 mm is opened, and it fixes to the inner wall surface of the existing water channel 12 in this state.
The reason why the interval S is set in this way is to absorb the expansion and contraction of the water channel repair plate 11 due to a change in temperature.

As shown in FIG. 5, the water channel repair plate 11 is formed by sticking a buffer material 11 b and a water swelling rubber (water swelling rubber) 11 c to the back surface of a square FRPM panel 11 a (a composite panel of FRP and mortar). ing.
The sheet-like cushioning material 11b is a square that is similar to the FRPM panel 11a and slightly smaller, and is affixed leaving the periphery of the FRPM panel 11a.
Here, the type of the buffer material 11b is not particularly limited, but closed cell foamed resin or foamed rubber is preferable.

Further, the water swelling rubber 11c is attached to the peripheral portion of the FRPM panel 11a so as to surround (enclose) the outer periphery of the buffer material 11b.
The thickness of the water swelling rubber 11c and the buffer material 11b is substantially the same.
The type of the water-swelling rubber 11c is not particularly limited. For example, natural rubber, isoprene rubber, styrene butadiene may be used as the base material when the water-absorbing polymer is kneaded into the base rubber (including the elastomer). Examples thereof include rubber and elastomer, and examples of the water absorbing polymer include sodium polyacrylate.
The expansion rate, water absorption rate, and the like of the water-swelling rubber 11c can be appropriately adjusted depending on the blending ratio of the rubber and the water-absorbing polymer.
From the above, it is understood that the arrangement relationship between the buffer material 11b and the water swelling rubber 11c is a relationship in which the water swelling rubber 11c can be regarded as a frame if the buffer material 11b is regarded as a forehead.

Although the dimension of the water channel repair board 11 is not specifically limited here, For example, about 20 mm in total of the thickness 10mm of the FRPM panel 11a and the thickness 10mm of the shock absorbing material 11b and the water swelling rubber | gum 11c is suitable.
The height is about 2000 mm, for example, and the width is about 1000 mm, for example.
The width W of the water swelling rubber 11c is not particularly limited, but is preferably about 3 to 10 mm, and more preferably about 4 to 6 mm.
This is because if the width is too narrow, the water absorption becomes worse, while if the width is too wide, the amount of water absorption increases so that the weight of the water channel repair plate increases and the cost increases.

As shown in FIGS. 1 to 4, the water channel repair plate 11 is formed with attachment holes 11 e penetrating the front and back surfaces at a predetermined interval.
The fixing of the water channel repair plate 11 as described above is performed by bringing the buffer material 11b and the water swelling rubber 11c side of the water channel repair plate 11 into close contact with the inner wall surface of the existing water channel 12, and the anchor bolts 13 of the existing water channel 12 through the mounting holes 11e. This is done by placing on the inner wall.
The type of anchor bolt 13 is not particularly limited, and may be, for example, a countersunk head. However, the metal expansion type (core rod driving type) all anchor bolt 13 as shown in the figure has high strength and is easy to construct. Is preferred.

Further, as shown in FIGS. 1 and 3, the joint material 11 d is filled in the upper gap between the water channel repair plate 11 and the existing water channel 12.
The type of the joint material 11d is not particularly limited. For example, a moisture-curing urethane-based joint material is used, and a primer is appropriately used in combination.

The construction of the water channel repair plate 11 to the repair water channel 10 is performed through, for example, FIG. 6 and the following nine procedures.
(1) Implement water change work according to the situation of the existing waterway 12.
(2) Clean the inner wall surface of the existing water channel 12.
Specifically, the inner wall surface of the existing water channel 12 is washed with a high-pressure jet type washing machine, the attached dirt and algae are cleaned, and the weathered concrete surface layer is removed.
When the elastomer used for the expansion / contraction part of the existing water channel 12 protrudes into the water channel, it is removed with a chisel or the like so as to be substantially flush with the inner wall surface of the water channel.
Moreover, when earth and sand etc. have accumulated in the bottom of the existing water channel 12, it removes with a scoop.
(3) Measure the channel width, height, water level, etc. of the existing channel 12.
(4) The water stop process of the location with the osmosis | permeation water of the existing water channel 12 is performed.
In the existing water channel 12 where cracked water permeates, the water is stopped with a water mortar or the like.
(5) The all anchor bolt 13 is temporarily placed in the existing water channel 12, and the strength is confirmed by a pull-out test.
Specifically, the existing water channel 12 is drilled, a metal expandable anchor bolt 13 is inserted into this hole, the core rod of the all anchor bolt 13 is driven with a hammer together with the test jig, and the load measuring device is expanded. The pull-out load is measured by
(6) The water channel repair plate 11 is completed by pasting the water swelling rubber 11c around the cushioning material 11b to the cushioning material 11b pasted on the rear surface of the FRPM panel 11a.
(7) The inner wall surface of the existing water channel 12 is drilled according to the position of the mounting hole 11 e of the water channel repair plate 11 and fixed with the all anchor bolts 13.
Specifically, first, the water channel repair plate 11 is aligned, and the buffer material 11b and the water swelling rubber 11c are brought into close contact with the inner wall surface of the existing water channel 12, and temporarily placed in the existing water channel 12.
At this time, a spacer (the thickness of which corresponds to S) is appropriately sandwiched between the water channel repair plates 11 so that the distance between the water channel repair plates 11 adjacent in the length direction of the existing water channel 12 is S. .
Next, the inner wall surface of the existing water channel 12 is drilled in accordance with the position of the mounting hole 11e of the water channel repair plate 11, and the inside of the hole is cleaned with a wire brush or a dust pump to remove chips and the like as appropriate.
The all anchor bolt 13 is inserted into this hole, the core rod is driven with a hammer and expanded in the hole, and the tightening condition of the nut is confirmed using a spanner.
Here, with respect to the curved portion of the existing water channel 12, the water channel repair plate 11 is cut according to the shape of the water channel using a diamond wheel cutter or the like so that the water channel repair plate 11 follows the shape of the existing water channel 12.
Further, when there is an inflow pipe opening in the middle of the existing water channel 12, an opening is made in the water channel repair plate 11 accordingly.
(8) Fill the upper gap between the existing water channel 12 and the water channel repair plate 11 with the joint material 11d.
(9) Water is passed through the repaired water channel 10 and a water flow test is performed to check the repair condition visually.

Since the repair water channel 10 thus formed uses the buffer material 11b for the water channel repair plate 11, unlike the case where a backfill material is used, no curing time is required at the time of repair work, and the construction period can be shortened.
Further, unlike the case of using a caulking material, it is not necessary to dry the inner wall surface of the existing water channel 12, so that the construction period can be shortened and labor saving can be achieved.

Further, as shown in FIG. 4, the buffer material 11b is deformed following the unevenness of the inner wall surface of the existing water channel 12, so that the gap between the FRPM panel 11a and the inner wall surface is almost completely filled.
Further, since the water swelling rubber 11c absorbs and holds water that may leak from the gap S, water leakage at the peripheral edge of the repair plate and water wrapping around the back surface of the repair plate are almost completely prevented.
Further, since the joint material 11d is filled in the upper gap, the appearance when the repairing water channel 10 is viewed from above is good, and further leakage of water in the upper part of the water channel is prevented.

In the above embodiment, the FRPM panel 11a is used for the water channel repair plate 11, but other fiber-reinforced synthetic resin panels such as FRP panels may be used.
Further, the fixing of the water channel repair plate 11 to the existing water channel 12 is not limited to that by the anchor bolt 13.
Further, the shape of the existing water channel 12 is not particularly limited, and may be a culvert closed on the upper side. In this case, the upper surface of the inner wall of the existing water channel 12 is appropriately repaired with the water channel repair plate 11.

Cross section of repair channel Perspective view of repair channel Cross section enlarged view of repair channel Cross section enlarged view of repair channel (A) of the water channel repair plate is an exploded perspective view, (b) is a perspective view, and (c) is an enlarged cross-sectional view. Repair flow construction flow chart

Explanation of symbols

10 Repair water channel 11 Water channel repair plate 11a FRPM panel 11b Buffer material 11c Water swelling rubber 11d Joint material 11e Mounting hole 12 Existing water channel 13 Anchor bolt S Spacing between water channel repair plates W Width of water swelling rubber

Claims (7)

A water channel repair plate 11 for repairing the water channel by attaching it to the inner wall surface of the existing water channel 12,
A panel 11a made of fiber-reinforced synthetic resin;
A cushioning material 11b affixed to one surface of the panel leaving a peripheral edge of the panel;
A water channel repair plate comprising: a water swelling rubber 11c attached to the peripheral edge of the panel so as to surround the cushioning material.   The water channel repair plate according to claim 1, wherein the buffer material 11 b is a closed cell foamed resin or foamed rubber.   The water channel repair plate according to claim 1, further comprising an attachment hole 11 e penetrating in the thickness direction. A repair method for an existing water channel 12 using the water channel repair plate 11 according to claim 1,
A step of bringing the plurality of water channel repair plates 11 into close contact with the inner wall surface of the existing water channel 12 on the side of the cushioning material 11b and the water swelling rubber 11c, with a predetermined interval along the existing water channel 12;
Fixing each of the water channel repair plates 11 to the opposing inner wall surface of the existing water channel 12, and a method of repairing the existing water channel. The existing waterway 12,
The buffer material 11b and the water-swelling rubber 11c side are brought into close contact with the inner wall surface of the existing water channel 12 and fixed in parallel along the existing water channel 12 with a predetermined interval. A repair channel comprising the water channel repair plate 11 according to 1. The existing waterway 12,
4. The water channel repair plate 11 according to claim 3, wherein the buffer material 11 b and the water swelling rubber 11 c are brought into close contact with an inner wall surface of the existing water channel 12, and are arranged in parallel along the existing water channel 12 at a predetermined interval.
A repair water channel comprising anchor bolts 13 driven into the existing water channel 12 through the attachment holes 11e of the water channel repair plate 11.   The repair channel according to claim 5 or 6, further comprising a joint material 11d filled in an upper gap between the existing channel 12 and the channel repair plate 11.

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