JP2011099240A - Waterway sheet construction method and waterway repair structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waterway sheet construction method and a waterway repair structure that can extend a service life of a concrete waterway with easy construction. <P>SOLUTION: An edge fixing plate 23 formed of a strip steel plate with a coating resin layer is fixed along the upper edge of each of both vertical wall parts of the concrete waterway 11 of substantially U-shaped cross section. Both vertical wall parts and a bottom part 13 are covered with a resin sheet 27 of specified length in a water flow direction (a), and the upper edge of the resin sheet 27 is welded to the edge fixing plate 23. A downstream end 27c of an upstream side resin sheet 27A is placed over an upstream end 27b of the resin sheet 27. Both vertical wall parts and bottom part 13 on the upstream side are covered with the upstream side resin sheet 27A, and the upper edge 27a of the upstream side resin sheet 27A is welded to the edge fixing plate 23A. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for constructing a waterway sheet for agricultural use, industrial use, and the like and a repair structure for the waterway.

  Agricultural and industrial waterways are often made of concrete, and as they age, they crack, break, or open joints. When such aging progresses, the malfunction that water flows out from the inside of a waterway or the water outside a waterway enters in a waterway, and increases a water volume will arise. As a repair method for such a concrete water channel, for example, a method in which a resin plate is attached to the inner surface of the water channel to cover it, a method in which a resin sheet is entirely bonded with an adhesive, or an inorganic concrete, FRP, photo-curing resin, etc. There are known a method for forming a coating film, a method in which a sheet with a full-surface protrusion anchor is attached to the inner surface of a concrete formwork, and a mortar is filled between the inner surface of the water channel and the back surface of the sheet after installation (Patent Document 1). Etc.).

JP 2009-74359 A

  However, it takes time to install the resin plate and the entire adhesion of the resin sheet. In addition, the application of inorganic concrete and the mortar filling method using a temporary frame require skill in construction, and it takes time and labor to cure, dry, harden, and remove the temporary frame. It became.

  This invention is made | formed in view of the said situation, The objective is to provide the sheet construction method of the water channel which can extend the lifetime of a concrete water channel by easy construction, and the repair structure of the existing concrete water channel.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The water channel sheet construction method according to claim 1 of the present invention is an edge fixing plate made of a steel plate with a coating resin layer in the form of a band along the upper edges 21 of both vertical wall portions 15 of a concrete water channel 11 having a substantially U-shaped cross section. Fixing 23,
A step of welding both edges 27a of the resin sheet 27 to the edge fixing plate 23 so as to cover the vertical wall portions 15 and the bottom portion 13 with a resin sheet 27 having a predetermined length in the water channel;
A step of intermittently welding the sheet connecting portion 43 in which the end portion 27c of the upstream resin sheet 27A is superimposed on the end portion 27b of the downstream resin sheet 27;
It is characterized by having.

  In this water channel sheet construction method, the upper edge 27a of the resin sheet 27 is welded to a pair of edge fixing plates 23 fixed to the upper edges 21 of both vertical wall portions 15, and the inner surface of the water channel having a substantially U-shaped cross section is formed on the resin sheet 27. , 27A. By passing water, the resin sheets 27 and 27A are pressed against the inner surface of the water channel by water pressure, and the resin sheets 27 and 27A are uniformly spread on the inner surface of the water channel. Since the downstream end 27c of the upstream resin sheet 27A overlaps the upstream end 27b of the resin sheet 27, the water flowing on the upstream resin sheet 27A is always on the downstream resin sheet 27. Will flow.

The waterway sheet construction method according to claim 2 is the waterway sheet construction method according to claim 1,
On both the vertical wall portions 15 and the bottom portion 13 at the position that becomes the sheet connecting portion 43 in which the end portion 27c of the upstream resin sheet 27A is overlapped on the end portion 27b of the downstream resin sheet 27, a belt-like shape is formed. And / or fixing the connecting portion fixing plate 39 made of a disc-shaped steel sheet with a coating resin layer;
The connecting portion fixing plate 39 is welded to the coated resin layer-coated steel plate, the downstream end portion 27b of the resin sheet 27 and the upstream end portion 27c of the resin sheet 27A, and at least the downstream side resin sheet 27 A step of intermittently welding the end portion 27b and the end portion 27c of the upstream resin sheet 27A;
It is characterized by comprising.

  In this water channel sheet construction method, the connection portion fixing plate 39 to which each resin sheet 27 can be welded crosses the water channel 11 at the position of the connection portion where the ends 27 b and 27 c of the downstream and upstream resin sheets 27 overlap. Will be provided. The connecting portion fixing plate 39, the end portion 27b of the downstream resin sheet 27, and the end portion 27c of the upstream resin sheet 27A are welded to each other, whereby a connecting portion (sheet connecting portion) 43 between the sheets is formed. The inner surface of the water channel is covered and fixed, and welding is intermittent at the sheet connecting portion 43, so that water or air that has entered between the inner surface of the water channel and the resin sheets 27 and 27A can be introduced from the non-welded portion into the water channel. .

The waterway sheet construction method according to claim 3 is the waterway sheet construction method according to claim 1 or claim 2,
A step of fixing a fixing plate 35 made of a steel plate with a covering resin layer in a strip shape and / or a disk shape to the necessary portions of both the vertical wall portions 15 and the bottom portion 13;
Welding the resin sheet 27 to the fixing plate 35;
It is characterized by comprising.

  In the water channel sheet construction method, a fixing portion to which the resin sheet 27 can be welded is obtained by the fixing plate 35 in addition to the upper edges 21 of both vertical wall portions 15 of the water channel. The fixing plates 35 can be scattered, and the fixing work is more efficient than the entire surface fixing. In addition, sheet lifting from the inner surface of the water channel is prevented.

The waterway sheet construction method according to claim 4 is the waterway sheet construction method according to claim 3,
The surface of the coated resin layer-coated steel plate constituting each of the fixing plates 23, 35, 39 is coated with a resin of the same material as the resin sheet 27 or a hot melt adhesive resin.

  In this water channel sheet construction method, both resin materials and the like are melted and cured at a constant temperature, and uniform fixing strength can be obtained.

The waterway sheet construction method according to claim 5 is the waterway sheet construction method according to claim 3 or claim 4,
Welding of the resin sheet 27 to the coated resin layer-attached steel plates constituting the fixing plates 23, 35, 39 is performed by electromagnetic induction heating from the surface of the resin sheet 27. .

  In this water channel sheet construction method, the fixing plates 23, 35, 39 made of a coated resin layer-attached steel plate located on the back from the surface of the thin resin sheet 27 are found, and the heating coil 41 of the electromagnetic induction heating device is connected to the resin sheet 27. Press against the fixing plates 23, 35, 39 from above. Thereby, heat by eddy current is generated in the steel plate, and the resin sheet 27 and the covering resin layer 29 of the fixing plates 23, 35, 39 are welded.

The repair structure of the water channel according to claim 6 includes an edge fixing plate 23 made of a strip-shaped steel plate with a covering resin layer and fixed along the upper edges of both vertical wall portions 15 of the concrete water channel 11 having a substantially U-shaped cross section. ,
A plurality of resin sheets 27 having a predetermined length in the water channel 11 and covering both the vertical wall portions 15 and the bottom portion 13 and welding both edges 27a to the edge fixing plate 23;
Comprising
An end portion 27c of the upstream resin sheet 27A is formed on the end portion 27b of the downstream resin sheet 27 to form a sheet connection portion 43, and the sheet connection portion 43 is intermittently welded. And

  In this water channel repair structure, the upper edge 27a of the resin sheet 27 is welded to a pair of edge fixing plates 23 fixed to the upper edges 21 of the vertical wall portions 15, and the inner surface of the water channel having a substantially U-shaped cross section is formed on the resin sheet 27. Covered by. By passing water, the resin sheets 27 and 27A are pressed against the inner surface of the water channel by water pressure, and the resin sheets 27 and 27A are uniformly spread on the inner surface of the water channel. Since the downstream end 27c of the upstream resin sheet 27A overlaps with the upstream end 27b of the resin sheet 27 to form the sheet connecting portion 43, the water flowing on the upstream resin sheet 27A always flows. It flows on the resin sheet 27 on the downstream side. Further, since both end portions 27b and 27c are intermittently welded at the position of the sheet connecting portion 43, water or air that has entered between the water channel inner surface and the resin sheets 27 and 27A is introduced into the water channel from the non-welded portion. It becomes possible.

The water channel repair structure according to claim 7 is the water channel repair structure according to claim 6,
A fixing plate 35 made of a steel plate with a covering resin layer and a belt-like and / or disk-like shape is fixed to both the vertical wall portions 15 and the bottom portion 13,
The fixing plate 35 is coated with the coated resin layer-coated steel plate, the downstream end portion 27b of the resin sheet 27 and the upstream end portion 27c of the resin sheet 27A, and at least the downstream end portion of the resin sheet 27. 27b and the end 27c of the upstream resin sheet 27A are intermittently welded.

  In the repair structure of the water channel, a fixing portion to which the resin sheet 27 can be welded is obtained by the fixing plate 35 other than the upper edges 21 of both the vertical wall portions 15 of the water channel. The fixing plates 35 can be scattered on the inner surface of the water channel, and the fixing work is more efficient than the entire surface fixing. In addition, sheet lifting from the inner surface of the water channel is prevented.

  According to the method for constructing a water channel sheet according to claim 1 of the present invention, an edge fixing plate made of a steel plate with a belt-like covering resin layer is fixed to the upper edges of both vertical wall portions of a concrete water channel, Since the edge is welded to the edge fixing plate and the downstream end of the upstream resin sheet is stacked on the upstream end of the resin sheet, the inner wall surface of the concrete water channel can be covered with easy construction. Can extend the life of this waterway. In addition, the existing concrete water channel can be easily repaired.

  According to the method for constructing a water channel sheet according to claim 2, the connecting portion fixing plate capable of welding each resin sheet crosses the water channel at the position of the connection portion where the end portions of the downstream and upstream resin sheets overlap each other. It can be provided and fixed. The connection portion fixing plate, the end portion of the resin sheet on the downstream side, and the end portion of the resin sheet on the upstream side are welded to each other, so that the sheet connection portion that is a connection portion between the sheets covers and fixes the inner surface of the water channel. And by welding intermittently in this sheet | seat connection part, the water and air which entered between the water channel inner surface and the resin sheet can be introduce | transduced into a water channel from a non-welding part.

  According to the method for constructing a water channel sheet according to claim 3, a fixing portion where the resin sheet can be welded can be obtained by the fixing plate other than the upper edges of both vertical wall portions of the water channel. Fixing plates can be scattered, and the fixing operation is more efficient than fixing the entire surface. Further, the resin sheet is prevented from floating from the inner surface of the water channel.

  According to the sheet construction method for a water channel according to claim 4, since the surface of each fixing plate is made of a resin of the same material as the resin sheet or a hot melt adhesive resin, the resin sheet is welded at a constant temperature. Then, the coating resin layer of the fixing plate and the surface of the resin sheet are melted to ensure welding, and uniform fixing strength can be obtained.

  According to the sheet construction method for a water channel according to claim 5, each fixed plate made of a coated resin layer-attached steel plate located on the back portion is found from the surface of the thin resin sheet, and the heating coil of the electromagnetic induction heating device is placed on the resin sheet. By pressing against the fixing plate, heat due to eddy current is generated toward the steel plate, and the resin sheet and the coating resin layer of each fixing plate can be welded. That is, heating is performed only at a portion where the fixing plate is present by electromagnetic induction, and the welding operation is efficiently advanced.

  According to the repair structure of the water channel according to claim 6, the upper edge of the resin sheet is welded to the pair of edge fixing plates fixed to the upper edges of both vertical wall portions of the concrete water channel, and the water channel has a substantially U-shaped cross section. The inner surface is covered and stretched by the resin sheet, and the upstream end of the resin sheet is overlapped on the upstream end of the resin sheet to form a sheet connecting portion. The flowing water always flows on the resin sheet on the downstream side. From this, the life of the concrete water channel can be extended by easy construction, and the repair can be easily realized. In addition, since both ends are intermittently welded at the position of the sheet connecting portion, water and air that have entered between the water channel inner surface and the resin sheet can be introduced into the water channel from the non-welded portion.

  According to the repair structure of the water channel according to claim 7, the fixing portion to which the resin sheet can be welded is obtained by a belt-shaped and / or disk-shaped fixing plate other than the upper edges of both vertical wall portions of the concrete water channel. It will be. That is, the fixing plates can be scattered on both the vertical wall portions and the bottom portion of the inner surface of the water channel, and the fixing operation is more efficient than the entire sheet fixing. In addition, the resin sheet is prevented from floating from the inner surface of the water channel.

It is a work process flow chart showing the procedure of the construction method concerning the present invention. It is a perspective view of a resin sheet upper edge. It is sectional drawing of the water channel which attached the stationary plate. FIG. 4 is a perspective view of FIG. 3. It is waterway sectional drawing showing the welding condition of the resin sheet to a fixing plate. It is sectional drawing of the water channel by the vertical surface of the direction along a water flow. It is sectional drawing by a surface perpendicular | vertical to the flow direction of the water channel which was provisionally passed. It is a perspective view of the water channel which attached the stationary plate of other embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a work process flow chart showing the procedure of a construction method according to the present invention, FIG. 2 is a perspective view of an upper edge of a resin sheet, and FIG.
The waterway sheet construction method according to the present embodiment can be suitably used for, for example, a three-surface waterway (trough type waterway) 11 shown in FIG. 3 typified by an agricultural waterway or the like. The water channel 11 is provided with a bottom portion 13 and vertical wall portions 15 and 15 which are rising portions provided upright at both ends of the bottom portion 13. Concatenated and built. In the sheet construction method according to the present invention, either the existing water channel 11 or the new water channel 11 may be the object of construction. In the present embodiment, a case where the water channel 11 is already installed, that is, a sheet construction method at the time of repair will be described as an example.

  In order to perform sheet construction on the water channel 11, first, mowing around the existing water channel 11 (S <b> 1 in FIG. 1) and mainly expose the inner wall surface of the U-shaped frame 17. The U-shaped frame 17 to be exposed is dammed by diverting the water flow, etc., and then cleaned such as removing dirt and removing moss (S2). After the cleaning, the cracks and breakage portions generated in both the vertical wall portions 15 and the bottom portion 13 are repaired by a caulking process or the like (S3).

  Inking 25 is performed to fix the edge fixing plate 23 shown in FIG. 2 to the upper edge 21 of the vertical wall 15 (S4). An edge fixing plate 23 made of a steel plate with a belt-like covering resin layer is fixed along the upper edge 21 of the vertical wall portion 15 (S5). The edge fixing plate 23 is coated on the surface with a coating resin layer 29 (see FIG. 3) made of the same material as a resin sheet 27 described later. For the base material (substrate) 31 of the edge fixing plate 23, an iron plate, a stainless steel plate, a plated steel plate such as a galvanized steel plate, a ferritic stainless steel plate, a martensitic stainless steel plate or the like is used. The coating resin layer 29 on the surface of the base material is coated and formed with a predetermined thickness by a coating film such as paint, and is made of a resin such as vinyl chloride. The coating resin layer 29 may be made of a hot melt adhesive resin. The edge fixing plate 23 is mechanically attached by, for example, a nail 33 driven by a nail driving high-pressure gun, an embedded anchor, or the like.

  In the fixing plate attaching step (S5) of the present embodiment, the fixing plate 35 shown in FIG. 3 is also fixed. As the fixing plate 35, a “special IH dedicated disk (trade name)” manufactured by CI Kasei Co., Ltd. can be suitably used. The fixed plate 35 has a circular plate shape, and the base material (substrate) 31 is a magnetic metal such as an iron plate, a plated steel plate, a stainless steel plate made of ferritic stainless steel such as SUS430, a martensitic stainless steel plate, or the like. . The covering resin layer 29 of the base material surface layer is coated and formed with a predetermined thickness by a coating film such as painting, like the edge fixing plate 23. The fixing plate 35 is mechanically attached by, for example, a nail 33 driven by a nail driving high-pressure gun, an embedded anchor, or the like.

  The fixing plates 35 are discretely fixed to the vertical wall portions 15 and the bottom portion 13 at appropriate intervals such as at predetermined intervals or in a staggered arrangement. A resin sheet 27 described later is welded to the surface of the fixed plate 35. By providing the fixing plate 35, a fixing portion to which the resin sheet 27 can be welded can be obtained in addition to the upper edges 21 of both the vertical wall portions 15, 15 of the water channel 11. In addition, the fixing portions can be scattered, and the fixing work is more efficient than continuous fixing on the entire surface. In addition, the fixed plate 35 may be formed in other shapes such as a belt shape in addition to the above-described disk shape.

  As described above, the surface of the edge fixing plate 23 and the fixing plate 35 is covered with the coating resin layer 29 made of the same material as the resin sheet 27. At a constant temperature, the covering resin layer of the fixing plate and the surface of the resin sheet are melted, and uniform fixing strength is obtained. Thereby, the resin sheet 27, the edge fixing plate 23, and the fixing plate 35 can be easily and reliably welded.

  After the fixing plate attachment is completed, joint coking 37 (see FIG. 2) for repairing the opening of the joint portion 19 is applied (S6).

FIG. 4 is a perspective view of FIG.
Between the edge fixing plates 23 to be opposed to each other, as shown in FIG. 4, at the position of the sheet connecting portion 43 that is the position of the connecting portion between the upstream resin sheet and the downstream resin sheet, which will be described later, A connecting portion fixing plate 39 made of a belt-shaped resin-coated plate is disposed so as to cross the bottom portion 13. The belt-like connection portion fixing plate 39 has the same configuration as the edge fixing plate 23. The resin sheet 27 is intermittently welded to the strip-shaped connection portion fixing plate 39. Thereby, the resin sheet 27 is also fixed in the water channel crossing direction b. As shown in FIG. 8B, the connecting portion fixing plate 39 may be integrally formed continuously with the edge fixing plate 23 and may be formed in a square frame shape. It is good also as a shape connected between the upstream edge part used as an opposing position, or between the downstream edge parts used as an opposing position. Furthermore, the above-mentioned disk-shaped fixing plate 35 may be arranged at this position to form a connection portion fixing plate. Also, as shown in FIG. It is good also as arranging multiple along the longitudinal direction of a waterway. In the case of this short belt-like connection fixing plate 39A, the welding length with the resin sheet 27 can be obtained in the direction of the water channel, and in the transverse direction of the bottom portion 13, it is intermittently arranged.

FIG. 5 is a cross-sectional view of the water channel showing the welding state of the resin sheet to the fixed plate.
After the joint caulking 37 is cured, the resin sheet 27 is temporarily welded to the edge fixing plate 23 of the vertical wall portion 15 (S7). The resin sheet 27 is made of a soft resin sheet having a good water barrier property, and for example, a vinyl resin having a thickness of 2 mm, an olefin resin, a thermoplastic resin, or the like is used. The resin sheet 27 is formed with a length along the water channel, for example, a predetermined length such as 5 m or 10 m, and the connection portion fixing plate 39 is arranged for each length (see FIG. 6). A plurality of the fixing plates 35 are arranged at necessary positions according to the height (depth) of the vertical wall portion 15 and the width of the bottom portion 13. In the embodiment, the various fixing plates 23, 35, 39 are made of stainless steel plates coated with vinyl chloride resin, the resin sheet 27 is made of a soft vinyl chloride resin water-impervious sheet, and has a white surface layer on the black main body layer. A resin sheet called a signal layer formed by laminating layers is preferable. According to the resin sheet of the signal layer, damage to the sheet during construction can be detected at an early stage.

  The resin sheet 27 is temporarily welded to the edge fixing plate 23 and then finally welded to the edge fixing plate 23 and the fixing plate 35 (S8). That is, the upper edge 27a (see FIG. 2) of the resin sheet 27 covering the vertical wall portion 15 and the bottom portion 13 is welded to the edge fixing plate 23. The edge fixing plate 23 and the fixing plate 35 are based on a metal plate. Thereby, the welding operation can be performed from the surface side of the resin sheet 27. The welding operation to the edge fixing plate 23 is performed by a hot air welding machine (not shown). On the other hand, the welding operation to the fixed plate 35 can be performed by a high frequency welding machine.

  The welding operation to the fixing plate 35 is to find the fixing plate 35 located at the back from the surface of the resin sheet 27, and as shown in FIG. 5, the heating coil 41 of the electromagnetic induction heating device is placed on the fixing plate 35 from the resin sheet 27. Press. Thereby, heat by eddy current is generated in the steel sheet, and the resin sheet 27 and the covering resin layer 29 of the fixing plate 35 are welded. Since welding to the fixing plate 35 is performed by electromagnetic induction heating from the surface of the resin sheet 27, only a portion where the fixing plate 35 is present is heat-welded, and heating is not performed in a portion where the fixing plate 35 is not present, and there are a plurality of fixing plates. It is possible to continue the welding of 35 locations, shorten the time, prevent the occurrence of unbonded portions, and improve the workability.

FIG. 6 is a cross-sectional view of a water channel by a vertical surface in a direction along the water flow.
After a single resin sheet 27 is welded to the edge fixing plate 23, the upstream end 27 b of the resin sheet 27 is welded to the connection fixing plate 39. Next, the upstream resin sheet 27A is welded in the same manner. On the upstream end portion 27b of the resin sheet 27, the downstream end portion 27c of the upstream resin sheet 27A is stacked with a predetermined width length as an overlap margin. The upstream resin sheet 27 </ b> A covers both the vertical wall portions 15 and the bottom portion 13 on the upstream side. The upper edge 27a of the upstream resin sheet 27A is welded to the upstream edge fixing plate 23A.

  The belt-like connecting portion fixing plate 39 located between the opposing edge fixing plates 23 has an upstream end portion 27b of the resin sheet 27 and a sheet connecting portion 43 at the downstream end portion 27c of the upstream resin sheet 27A. Be placed. As described above, the upstream end portion 27 b and the downstream end portion 27 c are intermittently welded to the connection portion fixing plate 39. Thereby, the overlapping structure is maintained, and the inversion and twisting of the overlapping are prevented.

  Thus, the resin sheet 27 spread on the inner surface of the water channel 11 is welded to the surfaces of the edge fixing plate 23, the fixing plate 35, and the connection portion fixing plate 39 having a predetermined thickness, and these edge fixing plates 23, Since the adhesive plate is not fixed to the entire surface of the sheet by the fixing plate 35 and the connection portion fixing plate 39, the construction is performed by so-called “floating” having an unbonded portion capable of forming a gap between the vertical wall portion 15 and the bottom portion 13. Is done.

FIG. 7 is a cross-sectional view taken along a plane perpendicular to the flow direction of the temporarily passed water channel.
Temporary water passing 45 is performed in the water channel 11 whose inner surface is covered with the resin sheet 27 by floating tension (S9). When the temporary water flow 45 is performed, the resin sheets 27 and 27A are pressed against the inner surface of the water channel by water pressure, and the resin sheets 27 and 27A are uniformly spread on the inner surface of the water channel.

  Further, since the downstream end 27c of the upstream resin sheet 27A overlaps the upstream end 27b of the resin sheet 27, the water that has flowed on the upstream resin sheet 27A is always downstream. 27 will flow. That is, water does not flow into the back surface of the resin sheet 27. And in the connection part 39, since the welding of the resin sheet 27 has become intermittent, the water and the air c which entered between the water channel inner surface and the resin sheet 27 (back surface) from this non-welding part and the sheet connection part 43. It can be introduced into the waterway. In this way, the resin sheet 27 is lifted and constructed so that the water entering from the outside of the water channel is taken into the resin sheet 27 floating. The taken back water or air is compressed when the water flows on the surface of the resin sheet 27, and is a water channel from the space of the sheet connection portion 43 at a pitch of 10 m for a straight line and 2 m for a curve, that is, a gap formed by intermittent welding. Come out inside.

  When the air venting is completed by the temporary water passage 45, the finishing is performed by the upper edge caulking 47 that closes the space between the upper edge 27a of the resin sheet 27 and the upper edge 21 of the vertical wall portion 15 (S10). Complete the sheet construction.

  Therefore, according to the sheet construction method for a water channel according to the present embodiment, the edge fixing plate 23 is fixed to the upper edge 21 of both the vertical wall portions 15 of the concrete water channel, and the upper edge 27a of the resin sheet 27 is connected to the edge. Since the downstream end 27c of the upstream resin sheet 27A is stacked on the upstream end 27b of the resin sheet 27 and welded to the fixing plate 23, the life of the concrete water channel 11 can be extended with easy construction. In addition, the existing water channel 11 can be easily restored.

In addition to the above effects, the waterway sheet construction method also has the following effects.
That is, the edge fixing plate 23, the fixing 35 and the connecting portion fixing plate 39 having the surface layer of the same material are fixed to the concrete wall in advance, and the edge fixing plate 23, the fixing plate 35, and the connecting portion fixing are fixed. Since it is fixed to the plate 39 by welding, the resin sheet 27 covering the vertical wall portion 15 and the bottom portion 13 does not have a hole, and can be attached only by heating.
In the conventional water-blocking sheet construction method, if a hole is made by a separator used especially for concrete casting, a vacuum negative pressure check is required for all the spreading sheets, but this sheet construction method does not need this. Since it is not necessary to install in advance in a mold like a conventional sheet with full-surface protrusion anchors (not shown), the construction becomes much easier. In addition, since it is not necessary to install a sheet with a full-surface protrusion anchor, it is possible to easily perform welding and joining, which is the most important for sheet construction, and to obtain a highly reliable water shielding structure.

  Since the resin sheets 27 and 27A can be fixed before the resin sheets 27 are welded to each other, self-propelled welding between the resin sheets 27 and 27A is also possible. The troublesome work of setting a T-type anchor sheet (not shown) of a conventional construction method in advance becomes unnecessary. Time-consuming welding work such as rolling up the T-shaped anchor sheet and welding hot air from the side does not occur. Workability is improved because no jigs are used during construction such as support frames and presser molds. The press form until the adhesive is cured, which is necessary for a structure in which the resin sheet 27 is adhered to the concrete side surface with an adhesive, is not required. Unlike construction methods such as coating film formation, coating film thickness non-uniformity and pinholes due to air bubbles do not occur, and the resin sheet 27 is covered with uniform thickness, and quality does not vary.

  Compared to a construction method for forming a coating-type water-impervious film, there is no fear of taking dirt into the water-impervious film before curing even outdoors. As a method for inspecting the welded portion after the construction of the resin sheet 27, an air check method using a double weld line (a line welded portion of the edge fixing plates 23, 23) can be employed. The pinhole inspection of the resin sheet surface after the resin sheet 27 is spread on the concrete surface can be inspected by the high voltage spark method. From the above, the workability is good, the construction period can be shortened, the number of personnel can be reduced, and the cost can be reduced.

  Moreover, the repair structure of the water channel which concerns on this Embodiment has the strip | belt-shaped edge part fixing plate 23 fixed along the upper edge 21 of both the vertical wall parts 15 in the concrete water channel 11 of a cross-sectional substantially U shape, A resin sheet 27 having a predetermined length in the direction a, covering both the vertical wall portions 15 and the bottom portion 13 and welding the upper edge 27a to the edge fixing plate 23, and a downstream end portion on the upstream end portion 27b of the resin sheet 27 An upstream resin sheet 27 </ b> A that overlaps 27 c and covers both the vertical wall portions 15 and the bottom portion 13 and welds the upper edge 27 a to the edge fixing plate 23 is provided.

  The upper edges 27a of the resin sheets 27 and 27A are welded to the pair of opposed edge fixing plates 23, and the inner surface of the water channel having a substantially U-shaped cross section is covered with the resin sheets 27 and 27A. When the temporary water flow 45 is performed, the resin sheets 27 and 27A are pressed against the inner surface of the water channel by water pressure, and the resin sheets 27 and 27A are uniformly spread on the inner surface of the water channel. Since the downstream end 27c of the upstream resin sheet 27A overlaps the upstream end 27b of the resin sheet 27, the water flowing on the upstream resin sheet 27A is always on the downstream resin sheet 27. Will flow. Thereby, the lifetime of the concrete water channel 11 can be extended by easy construction.

  In the above-described embodiment, the case where the waterway sheet construction method is applied to an agricultural waterway has been described as an example. However, the waterway sheet construction method according to the present invention is not limited to the following structures: Also, it can be suitably used. That is, the side of concrete water-impervious structures such as waste final disposal sites, adjustment ponds, and artificial ponds. Installation without water-sag sheet hanging or slack on the side of vertical concrete. Construction of a water shielding sheet structure with a low roughness coefficient on the inner surface of a structure through which water flows. Wall waterproofing of building structures. Install seats on the side walls and ceiling of the tunnel. Covers for concrete and structures to protect against erosion and corrosion, and to significantly improve the service life. Walls of industrial facilities related to water, such as water and sewage treatment facilities, food, chemical, and high-tech factories.

DESCRIPTION OF SYMBOLS 11 ... Concrete water channel 13 ... Bottom part 15 ... Vertical wall part 21 ... Vertical wall part upper edge 23 ... Edge part fixing plate 27 ... Resin sheet 27A ... Upstream resin sheet 27a ... Upper edge 27b ... End part (upstream end part) )
27c ... end (downstream end)
29 ... Coating resin layer 35 ... Fixing plate 39 ... Connection portion fixing plate 43 ... Sheet connection portion a ... Water flow direction

Claims (7)

A step of fixing an edge fixing plate made of a steel plate with a coating resin layer in a strip shape along the upper edges of both vertical wall portions of a concrete water channel having a substantially U-shaped cross section;
A step of welding the both edges of the resin sheet to the edge fixing plate so as to cover the vertical wall portions and the bottom portion with a resin sheet having a predetermined length in the water channel;
A step of intermittently welding a sheet connecting portion in which an end of the resin sheet on the upstream side is overlapped on an end of the resin sheet on the downstream side;
A method for constructing a channel for a waterway. It is the sheet construction method of the waterway of Claim 1,
On both the vertical wall portions and the bottom portion at the position of the sheet connecting portion in which the end portion of the upstream resin sheet is overlapped on the end portion of the resin sheet on the downstream side, a band shape and / or a disc shape A step of fixing a connecting portion fixing plate made of a steel plate with a coating resin layer;
While welding the coated resin layer-coated steel plate of the connection portion fixing plate, the end of the resin sheet on the downstream side and the end of the resin sheet on the upstream side, at least the end of the resin sheet on the downstream side and the upstream side of the resin sheet A step of intermittently welding the end of the resin sheet;
A method for constructing a channel for a waterway. It is the sheet construction method of the waterway of Claim 1 or Claim 2,
A step of fixing a fixing plate made of a steel plate with a covering resin layer in a strip shape and / or a disc shape to the necessary portions of both the vertical wall portions and the bottom portion;
Welding the resin sheet to the fixing plate;
A method for constructing a channel for a waterway. It is the sheet construction method of the waterway of Claim 3,
A water channel sheet construction method, wherein the surface of a steel sheet with a coating resin layer constituting each fixing plate is coated with a resin of the same material as the resin sheet or a hot melt adhesive resin. A method for constructing a water channel sheet according to claim 3 or claim 4,
The water channel sheet construction method, wherein welding of the resin sheet to the coated resin layer-coated steel plate constituting each of the fixing plates is performed by electromagnetic induction heating from the surface of the resin sheet. An edge fixing plate made of a strip-shaped steel plate with a coating resin layer fixed along the upper edges of both vertical wall portions of a substantially U-shaped concrete water channel;
A plurality of resin sheets having a predetermined length in the water channel, covering both the vertical wall portions and the bottom portion, and welding both edges to the edge fixing plate;
Comprising
A repair structure for a water channel, wherein an end portion of the upstream resin sheet is overlapped on an end portion of the resin sheet on the downstream side to form a sheet connection portion, and the sheet connection portion is intermittently welded . The water channel repair structure according to claim 6,
A fixed plate made of a steel plate with a coating resin layer in a strip shape and / or a disc shape is fixed to both the vertical wall portions and the bottom portion,
A steel plate with a covering resin layer of the fixing plate, an end of the resin sheet on the downstream side, and an end of the resin sheet on the upstream side are welded, and at least the end of the resin sheet on the downstream side and the resin on the upstream side Water channel repair structure, characterized in that the end of the sheet is welded intermittently.

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