Repair method and device for rubber dam with deflector

Abstract

To provide an emergency repair method and repair device for when damage such as breakage or cracking occurs near the base of a deflector of a rubber dam. [Solution] A first drilling step is performed in which through holes 11 are drilled at a predetermined interval in the rubber bag body 1 so that the damaged area is surrounded by the multiple through holes 11 penetrating the rubber bag body 1 and the leading edge 31 of the deflector 3. Next, a pair of upper and lower pressure plates 5, 6, 7, each having a multiple number of fastening holes 59, 69 formed therein at a predetermined interval, are positioned from the top and bottom sides of the rubber bag body 1, and then a second step is performed in which fastening fittings 8 are inserted into the fastening holes 59, 69 and through holes 11 to temporarily fasten them. Then, a third step is performed in which caulking 9 is filled into the gap between the rubber bag body 1 and the pair of upper and lower pressure plates 5, 6, 7. Finally, a fourth step is performed in which a part of the rubber bag body 1 and the caulking 9 are sandwiched between the pair of upper and lower pressure plates 5, 6, 7 to fix them in a state where they are sandwiched between them.

Description

[Technical field]

[0001] The present invention relates to a method and device for repairing a rubber dam with a deflector, and in particular to a repair method for emergency repair of breaks or cracks that have occurred near the base of a deflector, and a rubber dam repair device suitable for use in said repair method. [Background technology]

[0002] Rubber-coated fabric undulating weirs (hereafter referred to as "rubber weirs") are sometimes installed in rivers and irrigation channels for the purpose of irrigation and regulating drainage. A rubber weir is a cylindrically expanding rubber-coated fabric bag (hereafter referred to as "rubber bag") that is placed so that its longitudinal direction (weir axis direction) crosses the river or other waterway, with its bottom fixed to a concrete foundation (floor plate) laid on the riverbed or waterway bottom, and both spindle-shaped ends fixed to weir column walls installed on the riverbank or other waterway. The inside of the rubber bag is hollow, and when fluid (air or water) is supplied to it, the rubber bag expands and stands up, damming the water flow, and when fluid is discharged, the rubber bag deflates and falls down.

[0003] Some rubber dams have protrusions called deflectors or fins (hereafter referred to as "deflectors") to prevent vibration of the rubber bag. The deflectors are provided along the longitudinal direction of the rubber bag so that they are located at approximately the middle position on the downstream side of the rubber bag when the rubber dam is installed in a river or the like. Water flowing over the top of the rubber bag is separated from the surface of the bag body by the deflector, and vibration of the rubber bag is suppressed by creating an air chamber between the surface of the bag body and the overflowing water.

[0004] Rubber dams are easier to install and maintain than steel gates, and are currently installed and in operation in many locations. Rubber dams are subject to the impact of floating debris such as gravel and driftwood, as well as high temperatures, solar radiation, and internal pressure. As a result, they can break or crack, and as deterioration over time is unavoidable, it is necessary to consider repair methods for such cases. Conventionally, a method of sealing the damaged area by applying a sheet-like patch material (hereinafter referred to as the "patch material repair method") has been known as a repair method for dealing with damage such as air leakage or water leakage from inside a rubber bag or water intrusion into the rubber bag (see, for example, Patent Documents 1 and 2). Other methods for repairing through-hole damage (cracks) include the technology shown in Patent Document 3, the rubber plug stopper repair method, and the shell stopper repair method. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2006-2394 A [Patent Document 2] Japanese Patent Application Publication No. 5-331823 [Patent Document 3] Special Publication No. 62-6013 Summary of the Invention [Problem to be solved by the invention]

[0006] The patch material repair method mentioned above requires that the edges of the patch material be tightly attached to the bag body using adhesives and thermal vulcanization, making joining work difficult near the base of the deflector (near the joint between the bag body and the deflector), and is not suitable as a repair method for areas (sites) that are easily affected by vibration. Also, while the application of the rubber plug repair method can be considered for penetrating scratches up to about 10-30 mm, and the shell plug repair method can be considered for penetrating scratches of about 10-100 mm, no repair method has been established for damage larger than these that occurs near the base of the deflector.

[0007] If deterioration or damage is found in the rubber bag during inspection, a repair method (partial repair) will be considered depending on the level and scale of the damage. However, if the damage is significant and technically difficult to repair, or if it is more cost-effective to replace it than to repair it, it will be renewed (replaced with a new one). However, if preparations for the renewal work, such as procuring rubber bags, take time, emergency repairs will be considered as a temporary restoration measure until the renewal work can be started in order to avoid the adverse effects of the rubber dam malfunctioning. For example, during periods when there is a high need for water intake, such as irrigation season, the impact of the rubber dam not functioning will be significant, so there is a strong need to carry out emergency measures to temporarily restore the dam.

[0008] The present invention has been made in consideration of the above-mentioned problems, and has an object to provide an emergency repair method and repair device when damage such as breaks or cracks occurs near the base of a rubber dam deflector. [Means for solving the problem]

[0009] The method for repairing a rubber dam with a deflector of the present invention is a method for repairing a rubber dam with a deflector when a rubber bag body having a tubular bag body sealed at both ends and a deflector protruding from the bag body in the longitudinal direction of the bag body is damaged near the base of the deflector, and is characterized by sequentially carrying out the following four steps. That is, the repair method is as follows: a first step of drilling a plurality of through holes at predetermined intervals in the rubber bag so that the damaged area is surrounded by the through holes and a leading edge of the deflector; a second step of arranging a pair of upper and lower presser plates, each having a plurality of fastening holes formed at a predetermined interval, from the upper and lower sides of the rubber bag body so that the fastening holes communicate with the through holes, and then inserting fastening fittings into the fastening holes and the through holes to temporarily fasten the rubber bag body; A third step of filling a gap between the rubber bag body and the pair of upper and lower pressing plates with caulking; a fourth step of fixing the part of the rubber bag body and the caulking in a sandwiched state between the pair of upper and lower pressing plates by fully tightening the fastening fittings inserted into the fastening holes and the through holes; The following is to be implemented.

[0010] The repair device for a rubber dam with a deflector of the present invention is a rubber bag body having a cylindrical bag body with both ends sealed and a deflector protruding from the bag body along the longitudinal direction of the bag body. In a rubber dam equipped with a deflector, when the rubber bag is damaged near the base of the deflector, A repair device for a rubber dam with a deflector, comprising: a pair of upper and lower pressing plates extending in a band shape, the pressing plates having a plurality of fastening holes formed therein, the pressing plates being attached so as to sandwich the rubber bag from above and below; a plurality of fastening fittings that are fitted into the through holes and the fastening holes formed in the rubber bag body and fasten the pair of upper and lower pressing plates together in a state in which a part of the rubber bag body is sandwiched between the fastening fittings; death, The pair of upper and lower pressing plates are attached to the rubber bag body so that the damaged area is surrounded by the pair of upper and lower pressing plates and the leading edge of the deflector. The present invention is characterized in that: Effect of the Invention

[0011] The present invention can provide an emergency repair method and repair device for when damage such as breakage or cracking occurs near the base of a deflector of a rubber dam. The present invention can be applied to locations where emergency repairs are difficult with conventional techniques, such as near the base of a deflector of a rubber dam, and can prevent water from entering the rubber bag from the damaged location (hereinafter sometimes referred to as the "damaged part") and air and water leakage from inside the rubber bag. In addition, a pair of upper and lower pressing plates attached so as to surround the periphery of the damaged part can suppress damage such as the progression of cracks. This invention is basically positioned as a medium- to short-term emergency repair method and device for, for example, about one year, in situations where future renewal is planned, and is not intended for permanent use. The purpose of this invention is not to completely restore the original functionality of a rubber dam, but to temporarily restore it to a certain level, and although application of this invention will cause the rubber bag to have a somewhat distorted shape, resulting in some areas where the original dam height cannot be secured, this technology is particularly useful as a temporary restoration method during periods when water intake is highly necessary, such as irrigation seasons. [Brief description of the drawings]

[0012] [Figure 1]1 is a diagram showing an internal configuration of a repair device according to the present invention, and is also an explanatory diagram of an attachment state to a rubber bag body. [Diagram 2] FIG. 2 is an explanatory diagram of the mounting position of the repair device according to the present invention, and for the sake of convenience, fastening fixtures are not shown. [Diagram 3] FIG. 4 is a perspective view showing the configuration of each of three pairs of upper and lower pressing plates. [Figure 4] 4A and 4B are diagrams showing one (upper surface side) of the pair of upper and lower pressure plates shown in FIG. 3, in which (A) is a plan view showing the upper surface side, (B) is a plan view showing the opposite surface (lower surface side) that contacts the rubber bag body, and (C) is an enlarged view of the cross section taken along line CC shown in (A). [Diagram 5] 4A and 4B are diagrams showing one (lower surface side) of the pair of upper and lower pressure plates shown in FIG. 3, in which (A) is a plan view showing the surface (upper surface side) that contacts the rubber bag body, (B) is a plan view showing the opposite surface, that is, the lower surface side, and (C) is an enlarged view of the cross section along line CC shown in (A). [Figure 6] This is an image diagram of the repair device of the present invention attached to a rubber dam installed in a river, and in particular shows the state in which the repair device of the present invention is attached to a damaged area near the end of a spindle-shaped rubber bag fixed to a dam pillar wall installed on the riverbank. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The present invention relates to a method and device for repairing an existing rubber dam with deflector, which is intended to repair a damaged area when a rubber bag body 1 having a tubular bag body 2 with both ends sealed and a deflector 3 protruding from the bag body 2 along the longitudinal direction of the bag body 2 is damaged near the base of the deflector 3. Note that the case where the deflector 3 is damaged near the base is not limited to the case where the vicinity of the connection between the bag body 2 and the deflector 3 is damaged, but also includes the case where the deflector 3 itself is damaged.

[0014] The structure of this existing rubber dam with deflector is well known, and the rubber bag 1 is formed into a cylindrical shape by joining the edges of rubber-coated fabric in an overlapping state. Both ends of the rubber bag 1 in the longitudinal direction are sealed in a spindle shape. The cylindrical rubber bag 1 is provided with a supply / discharge port (not shown) to which a fluid supply / discharge pipe (not shown) is connected. By connecting a blower, compressor, pump, or the like to this supply / discharge port and operating it, fluid can be supplied to the inside of the rubber bag 1 through the supply / discharge port, causing the rubber bag 1 to inflate into a cylindrical shape. Conversely, by discharging the internal fluid from the inside of the rubber bag 1 through the supply / discharge port by suction or natural discharge, the rubber bag 1 can be deflated into a flat plate shape.

[0015] The rubber bag 1 is arranged so that its longitudinal direction crosses the direction of flowing water and the deflector 3 is located in the middle part on the downstream side, and its bottom is fixed to a concrete foundation (floor plate). The deflector 3 is provided along the longitudinal direction of the rubber bag 1 so that it is located in the middle part of the downstream side of the rubber bag 1 when the rubber dam is installed in a river or the like. When the rubber bag 1 is inflated in this installed state, it stands upright, and the cylindrically inflated rubber bag 1 can dam the water flow. Therefore, the overflow water that has gone over the top of the rubber bag 1 is separated from the surface of the bag body 2 by the deflector 3 in the middle part of the downstream side, thereby suppressing the vibration of the rubber bag 1.

[0016] Next, an example of the configuration of the repair device 4 used in the repair method for a deflector-equipped rubber dam according to the present invention will be briefly described to the extent necessary for explaining the repair method. Next, the repair method using the repair device 4 and its effects will be described. After that, the configuration of the repair device 4 will be described in detail. The repair method according to the present invention is not limited to being carried out using the repair device 4 described below. The number and arrangement of fastening holes formed in the pressing plate are arbitrary (for example, they do not have to be arranged in a straight line), and the number and shape of the pressing plates that make up the pressing plate can also be changed arbitrarily.

[0017] The repair device 4 is attached so as to sandwich a part of the rubber bag body 1 from above and below, and includes a pair of upper and lower pressing plates 5, 6, 7 extending in a band shape (rail shape) with a plurality of fastening holes 53, 54, 63, 64, 73, 74 formed therein, and a plurality of fastening metal fittings 8 attached to the through hole 11 and the fastening holes 53, 54, 63, 64, 73, 74 drilled in the rubber bag body 1, and fastening the pair of upper and lower pressing plates 5, 6, 7 in a state in which a part of the rubber bag body 1 is sandwiched between them. As described later, after the repair device 4 is temporarily fixed to the rubber bag body 1, caulking 9 is filled between the rubber bag body 1 and the pair of upper and lower pressing plates 5, 6, 7.

[0018] The pair of upper and lower pressing plates constituting the repair device 4 is not limited to being made up of one steel plate each at the top and bottom. That is, the pair of upper and lower pressing plates constituting the present invention may be one set, or three sets as shown in this embodiment, and the number of sets can be appropriately changed depending on the size of the damaged area, the damage state, etc. The pair of upper and lower presser plates according to this embodiment consists of three pairs of upper and lower presser plates 5, 6, and 7, and in the second step described below, the second step is performed for each of these pairs of upper and lower presser plates 5, 6, and 7. Similarly, in the third step, the gap between each of the pairs of upper and lower presser plates 5, 6, and 7 and the rubber bag body 1 is filled with caulking 9, and in the fourth step, the fourth step is performed for each of the pairs of upper and lower presser plates 5, 6, and 7.

[0019] Each of the pair of upper and lower pressure plates 5, 6, 7 is composed of pressure plates 51, 61, 71 (hereinafter sometimes referred to as "upper pressure plates") arranged from the upper surface side of the rubber bag body 1 as shown in Fig. 4, and pressure plates 52, 62, 72 (hereinafter sometimes referred to as "lower pressure plates") arranged from the lower surface side of the rubber bag body 1 as shown in Fig. 5. Each of the pressure plates 51, 52, 61, 62, 71, 72 is made of steel. The lower pressure plates 52, 62, 72 shown in Figures 3 and 5 and the upper pressure plates 51, 61, 71 shown in Figure 4 are drawn as if their ends are connected to each other, but each pressure plate is actually separate, like the upper pressure plates 51, 61, 71 shown in Figure 3.

[0020] Each of the retainer plates 51, 52, 61, 62, 71, and 72 has fastening holes formed at predetermined intervals. The upper pressure plates 51, 61, 71 and the lower pressure plates 52, 62, 72 are fastened to each other by using fastening fittings 8 to sandwich a part of the rubber bag body 1 from above and below. Therefore, the fastening holes 53, 63, 73 of the upper pressure plates 51, 61, 71 and the fastening holes 54, 64, 74 of the lower pressure plates 52, 62, 72 that form a pair are formed symmetrically with respect to the rubber bag body 1 in terms of their positions and spacing. In other words, the upper pressure plates 51, 61, 71 and the lower pressure plates 52, 62, 72 are formed so that the fastening holes 53, 63, 73 of the upper pressure plates 51, 61, 71 and the fastening holes 54, 64, 74 of the lower pressure plates 52, 62, 72 that form a pair communicate with each other when the two are overlapped.

[0021] As mentioned above, the upper and lower pairs of pressure plates 5, 6, 7 consist of multiple sets, specifically, a pair of upper and lower first pressure plates 5 attached along the longitudinal direction of the bag body 2, a pair of upper and lower second pressure plates 6 attached so that one end is continuous with one end of the pair of upper and lower first pressure plates 5 and the other end reaches the leading edge 31 of the deflector 3, and a pair of upper and lower third pressure plates 7 attached so that one end is continuous with the other end of the pair of upper and lower first pressure plates 5 and the other end reaches the leading edge 31 of the deflector 3. The lower presser plates 52, 62, 72 shown in Figs. 3 and 5 and the upper presser plates 51, 61, 71 shown in Fig. 4 are shown attached so as to be continuous.

[0022] The pair of upper and lower first pressing plates 5 are composed of an upper pressing plate 51 and a lower pressing plate 52, which are linearly extending band-like members. The dimensions of the common parts of these pressing plates 51, 52 are the same. The first pressing plate 5 is temporarily fixed to the rubber bag body 1 by a longitudinal temporary fixing step described later. The pair of upper and lower second pressing plates 6 are composed of an upper pressing plate 61 and a lower pressing plate 62, which are strip-shaped members that are bent in an L-shape. The common parts of these pressing plates 61, 62 have the same dimensions. Each pressing plate 61, 62 has a portion 61a, 62a attached in the longitudinal direction of the bag body 2, and a portion 61b, 62b attached in a direction intersecting the longitudinal direction. Therefore, when attaching the second pressing plate 6 to the rubber bag body 1, a longitudinal temporary fixing step and an intersecting temporary fixing step, which will be described later, are performed. The pair of upper and lower third pressing plates 7, like the pair of upper and lower second pressing plates 6, are composed of an upper pressing plate 71 and a lower pressing plate 72, which are strip-shaped members that are bent in an L-shape. The common parts of these pressing plates 71, 72 have the same dimensions. Each pressing plate 71, 72 has a portion 71a, 72a that is attached in the longitudinal direction of the bag body 2, and a portion 71b, 72b that is attached in a direction intersecting the longitudinal direction. Therefore, when attaching the second pressing plate 7 to the rubber bag body 1, a longitudinal temporary fixing step and an intersecting temporary fixing step, which will be described later, are performed.

[0023] The fastening hardware 8 is made up of a combination of a bolt 81 and a nut 82, but is not limited to this. However, the repair method and repair device according to the present invention are positioned as a temporary restoration method until the condition is such that the renewal work can be started. Therefore, it is preferable to use fastening hardware that can be removed at a later date.

[0024] <Repair method> An example of a repair method using this repair device 4 and its effect will be described below taking as an example a case where the vicinity of the base of the deflector 3 is broken and damaged.

[0025] <Preparation> First, the water level is lowered by surrounding the damaged portion of the rubber dam with sandbags, etc., and the damaged portion D (damaged portion D) and its surroundings in the rubber bag 1 are positioned above the water surface. Steps 1 to 4 described below are performed above the water surface. In addition, the fluid inside the bag body 2 is discharged, and the bag body 2 around the damaged area is deflated into a flat plate, that is, the part 21 of the bag body (rubberized cloth) above the deflector 3 and the part 22 of the bag body (rubberized cloth) below it are brought into surface contact with each other. The sandbag work and the fluid discharge work may be carried out in any order.

[0026] <1st process> This step is a drilling step in which through holes 11 are drilled at predetermined intervals in the rubber bag body 1 using a drill tool so that the damaged area D is surrounded by the multiple through holes 11 penetrating the rubber bag body 1 and the leading edge 31 of the deflector 3. The leading edge 31 of the deflector 3 is provided extending approximately parallel to the longitudinal direction of the bag body 2. Each through hole 11 is drilled so that the damaged area D is surrounded by the leading edge 31 and the multiple through holes 11.

[0027] More specifically, this process includes a longitudinal drilling step and a cross-direction drilling step, and is performed by executing these steps. The cross-direction drilling step is performed twice to surround the damaged portion D. The order of execution of these steps is arbitrary, but preferably, the longitudinal drilling step is performed first, then the first cross-direction drilling step is performed from the vicinity of the through holes at one end (e.g., the left bank side) of the through holes drilled by the longitudinal drilling step, and thereafter, the second cross-direction drilling step is performed from the vicinity of the through holes at the other end (e.g., the right bank side) of the through holes drilled by the longitudinal drilling step.

[0028] The longitudinal hole making step is a process of making a plurality of through holes 11 at predetermined intervals (the same intervals as the fastening holes) along the longitudinal direction of the bag body 2 at positions spaced a certain distance from the leading edge 31 of the deflector 3. By performing this process, a plurality of through holes 11 are made in a straight line at predetermined intervals in a direction approximately parallel to the leading edge 31 of the deflector 3. As shown in Figure 2, when the damaged portion D extends along the longitudinal direction of the bag body 2, the through holes 11 are drilled at a predetermined interval so that pressure plates 51, 52 longer than the longitudinal dimension of the damaged portion D can be arranged.

[0029] The intersecting hole making step is a process of making a plurality of through holes 11 at predetermined intervals along a direction intersecting the longitudinal direction of the bag body 2 between a position (a position on an extension line of a line connecting the positions where the through holes 11 were made in the longitudinal hole making step) that is a certain distance away from the tip edge 31 of the deflector 3 and the tip edge 31 of the deflector 3. The direction intersecting the longitudinal direction of the bag body 2 may be a direction perpendicular to the longitudinal direction of the bag body 2, or may be an oblique direction (for example, a direction that forms an angle of about 45 degrees with respect to the longitudinal direction) as shown in the figure. The through holes 11 may be provided not only in the bag body 2 but also in the location where the deflector 3 is formed, as shown in FIG.

[0030] The predetermined intervals at which the through holes 11 are drilled are equal to the intervals between the fastening holes 53, 54, 63, 64, 73, and 74 provided in the pressing plates 5, 6, and 7. In practice, the through holes 11 are drilled in the rubber bag body 1 at the repair site at intervals equal to the intervals between the fastening holes 53, 54, 63, 64, 73, and 74 formed in the pressing plates 5, 6, and 7 already manufactured in the factory (for example, intervals arbitrarily set between 75 mm and 100 mm). At this time, the through holes 11 are drilled through the bag body 2 and open on the top and bottom surfaces with the upper part 21 and the lower part 22 of the bag body 2 in surface contact with each other. By carrying out this process, a plurality of through holes 11 are formed in the rubber bag body 1 in a U-shape when viewed from above, so that the damaged area D is surrounded by the plurality of through holes 11 and the leading edge 31 of the deflector 3, as shown in Figure 2.

[0031] <Second process> This process is a pressure plate temporary fastening process in which a pair of upper and lower pressure plates 5, 6, 7, each of which consists of a pressure plate having a plurality of fastening holes 53, 54, 63, 64, 73, 74 formed at a predetermined interval, are positioned from the upper and lower sides of the rubber bag body 1 so that the fastening holes 53, 54, 63, 64, 73, 74 communicate with the through hole 11, and then fastening fittings 8 are inserted into the fastening holes and through hole 11 to temporarily fasten them. In this step, it is sufficient to insert the fastening fittings 8 into the fastening holes 53, 54, 63, 64, 73, 74 and part of the through hole 11 and temporarily fasten them to the extent that it does not interfere with the next third step. In the illustrated example, the fastening fittings 8 have bolts 81 inserted from the top side, but the bolts may be inserted from the bottom side (the opposite direction). Note that, as long as it does not interfere with the next third step, the fastening fittings 8 may be inserted into all of the fastening holes and through hole 11 and temporarily fastened. In other words, in this step, it is not necessary to insert the fastening fittings 8 into the fastening holes 53, 54, 63, 64, 73, 74 and part of the through hole 11 and temporarily fasten them. Attached All of the holes and through holes 11 are fastened. Attached It is not necessary to insert the metal fittings 8 and temporarily fasten them. If the pair of upper and lower presser plates 5, 6, 7 can be temporarily fastened to such an extent that it does not interfere with the next third step, it is sufficient to temporarily fasten only a part of them.

[0032] This process includes a step of temporarily fixing one or more sets of the pair of upper and lower presser plates to the through holes drilled in the longitudinal hole drilling step (hereinafter referred to as the "longitudinal temporary fixing step"), and a step of temporarily fixing one or more sets of the pair of upper and lower presser plates to the through holes drilled in the transverse hole drilling step (hereinafter referred to as the "transverse temporary fixing step"), and is performed by executing these steps. The order of execution of the longitudinal temporary fixing step and the transverse temporary fixing step is arbitrary. In the case where there are multiple pairs of upper and lower presser plates as in this embodiment, this step is carried out for each pair, but it is possible to select which pair to carry out the step from. However, in the case where there are three pairs of upper and lower presser plates 5, 6, 7 as in this embodiment, they are attached so that they are continuous, so it is easier to attach them from the first presser plate 5 of the upper and lower pair.

[0033] First, when the first pressing plate 5 is temporarily fixed, the pressing plate 51 having the fastening hole 53 formed therein is arranged from the upper surface side of the rubber bag body 1 so that the fastening hole 53 communicates with the through hole 11 drilled in the longitudinal drilling step, and the pressing plate 52 having the fastening hole 54 formed therein is arranged from the lower surface side of the rubber bag body 1 so that the fastening hole 54 communicates with the through hole 11 drilled in the longitudinal drilling step. Then, the bolts 81 (fastening bolts) are inserted into the fastening holes 53, 54 and the through hole 11. Deposit Insert tool 8) and temporarily secure it in place. Next, in order to temporarily fasten the second pressing plate 6, the pressing plate 61 having the fastening hole 63 formed therein is arranged from the upper surface side of the rubber bag body 1 so that the fastening hole 63 communicates with the through hole 11 formed in the longitudinal drilling step and the cross direction drilling step, and the pressing plate 62 having the fastening hole 64 formed therein is arranged from the lower surface side of the rubber bag body 1 so that the fastening hole 64 communicates with the through hole 11 formed in the longitudinal drilling step and the cross direction drilling step, and then the bolts 81 (fastening bolts) are inserted into the fastening holes 63, 64 and the through hole 11. Deposit By performing these steps, the portions 61a, 62a of the presser plates 61, 62 are arranged along the longitudinal direction of the bag body 2, and the portions 61b, 62b of the presser plates 61, 62 are arranged in a direction intersecting the longitudinal direction. Finally, the third pressing plate 7 is temporarily fixed. The procedure is similar to the procedure for temporarily fixing the second pressing plate 6 described above, and therefore the explanation thereof will be omitted.

[0034] The first presser plates 51, 52 and the second presser plates 61, 62 are attached so that their ends are continuous with each other to avoid gaps. Similarly, the first presser plates 51, 52 and the third presser plates 71, 72 are attached so that their ends are continuous with each other to avoid gaps. In this embodiment, the pair of upper and lower presser plates consists of three sets of presser plates 5, 6, 7, but is not limited to this and can be appropriately changed depending on the position and size of the damaged part D, the weight of the presser plates, etc. For example, the presser plates 51, 52 constituting the first presser plate 5 are long members, but the presser plates 51, 52 attached in the longitudinal direction of the bag body 2 may be further divided to be composed of a plurality of presser plates, that is, divided into a plurality of sets. In this case, the longitudinal temporary fixing step is a step of temporarily fixing the plurality of sets of presser plates to the through holes drilled in the longitudinal hole making step. Similarly, the portions 61b, 62b, 71b, and 72b of the presser plates 61, 62, 71, and 72 attached in the cross direction of the bag body 2 may be further divided to be composed of a plurality of presser plates, that is, divided into a plurality of sets. In this case, the cross direction temporary fixing step is a step of temporarily fixing the plurality of sets of presser plates to the through holes formed in the cross direction hole making step.

[0035] Instead of forming each of the upper and lower pressure plates constituting the pair of upper and lower pressure plates as one unit from a single steel sheet, as in this embodiment, they are divided into a plurality of pressure plates to form a plurality of sets of pressure plates, and each set is attached separately (by carrying out the second step), which facilitates attachment (temporary fastening) to the rubber bag body 1. In addition, since the first to third pressure plates 5, 6, and 7 are each separate after attachment, even if the rubber bag body 1 is subjected to the collision of a water current or a flowing object, the rubber bag body 1 deforms so as to curve between the pressure plates 5, 6, and 7 (at the divisions), and deformation of each pressure plate is suppressed.

[0036] When temporarily fastening the pair of upper and lower pressure plates, a sufficient amount of Penguin Seal (registered trademark) may be applied as caulking to the existing rubber bag body (rubber-coated cloth) before attaching them.

[0037] <3rd process> This process is a caulking process in which a caulking gun filled with caulking material is used to fill the gaps between the rubber bag 1 and the pair of pressing plates 5, 6, and 7 with caulking 9. Filling these gaps with caulking 9 ensures airtightness and watertightness, and prevents water from entering the rubber bag 1 and air and water from leaking from the inside of the rubber bag 1. Examples of caulking materials include those made by compounding fillers, flame retardants, etc. with synthetic resin materials such as silicone resins, acrylic resins, and urethane resins as the main components.

[0038] The caulking 9 may be filled through any gaps that exist between the surface of the rubber bag 1 and the inner surfaces of the upper and lower pair of pressing plates 5, 6, 7 into which the caulking 9 can be injected, or through gaps between the temporarily fastened fastening fittings 8 and the fastening holes 53, 54, 63, 64, 73, 74 or through holes 11. When the fastening fittings 8 are temporarily fastened by inserting them into some of the fastening holes and through holes 11, that is, when the fastening fittings 8 are not inserted into some of the fastening holes and through holes 11, the caulking 9 can also be injected through the uninserted fastening holes and through holes 11.

[0039] <4th process> This step is a final tightening step in which the fastening fittings 8 inserted into the fastening holes 53, 54, 63, 64, 73, 74 and the through hole 11 are finally tightened to fix a part of the rubber bag body 1 and the caulking 9 in a sandwiched state between the pair of upper and lower pressing plates 5, 6, 7. Note that, if the fastening fittings 8 are inserted into only some of the fastening holes and through holes 11 in the second step and temporarily tightened, the fastening fittings 8 will not be tightened into all the remaining fastening holes and through holes 11. Attached The metal fitting 8 is inserted and fastened.

[0040] When this process is carried out, the damaged area D is surrounded by a pair of upper and lower presser plates 5, 6, 7 in a U-shape, and airtightness and watertightness are ensured between the pair of upper and lower presser plates 5, 6, 7, so that a U-shaped area that ensures airtightness and watertightness is formed surrounding the damaged area D, preventing water from entering the rubber bag 1 from the damaged area D and preventing air and water leakage from inside the rubber bag 1. In addition, by solidifying the periphery of the damaged area D with the presser plates 5, 6, 7, damage such as the progression of cracks can be suppressed.

[0041] FIG. 6 is an image diagram of a rubber dam with a deflector installed in a river that has been damaged by penetration near the base of the deflector near the dam pillar wall, after this repair method has been applied, i.e., an image diagram of the state with the repair device 4 according to the present invention attached. After the above-mentioned preparations are performed, the first step is performed to make a through hole in the rubber bag 1 so as to surround the damaged area D, and then the second and third steps are performed to fill the spaces between the pressing plates 5, 6, 7 and the rubber bag 1 with caulking 9. Figure 6 shows the state immediately after the fourth step, and the rubber bag 1 is depicted in a deflated state because the fluid inside the bag body 2 has been drained in order to perform each of these steps.

[0042] <Effects (Methods)> The repair method according to the present invention can prevent water from entering the rubber bag 1 from the damaged area D, and can prevent air and water from leaking from inside the rubber bag 1, and can also suppress the progression of cracks. Unlike the conventional technique of attaching a repair material by bonding with an adhesive or thermal vulcanization, this method involves drilling through holes 11 in the rubber bag 1 and firmly fastening a pair of upper and lower steel pressing plates 5, 6, and 7, so that it can be applied even in difficult joining locations such as near the base of the deflector 3 (near the connection between the bag body and the deflector), and because it is firmly attached, there is no risk of it coming off due to vibration.

[0043] The repair method according to the present invention is not a repair method in which a repair material is directly injected into the damaged part or a repair tool is attached, as in the conventional rubber plug stopper repair method or shell plug repair method. The present invention is a technology characterized by the fact that the periphery of the damaged part is sandwiched between pressing plates to make the periphery of the damaged part D airtight (creating an airtight part between the damaged part and the inside of the bag body), thereby preventing air leakage, water leakage, and water ingress. The repair method according to the present invention is based on the unprecedented novel idea of ​​drilling a plurality of through holes 11 in a rubber bag 1 that has damage such as cracks. The present invention is basically an emergency repair method that is applied in a situation where future renewal involving replacement of the entire rubber bag 1 is planned, so there is no problem in drilling the through holes 11 in the rubber bag 1.

[0044] In the repair method according to the present invention, the damaged area D to be repaired is surrounded by a pair of upper and lower pressing plates 5, 6, 7 attached along a plurality of through holes 11 penetrating the rubber bag body 1, and the leading edge 31 of the deflector 3. In other words, the weight of the pressing plates is prevented from causing the leading edge side of the deflector 3 to sag as much as possible. In addition, the pressing plates 5, 6, 7 are formed from strip-shaped members and attached to surround the damaged area D rather than to cover and hide the entire damaged area D, leaving the portion of the rubber bag body 1 exposed to the water flow, thereby preventing the function of the deflector 3 from being impaired as much as possible.

[0045] <Repair device> The configuration and effects of the repair device 4 will now be described in detail.

[0046] The repair device 4 is a repair device for a rubber dam with a deflector, which comprises a rubber bag body 1 having a cylindrical bag body 2 with both ends sealed and a deflector 3 protruding from the bag body 2 along the longitudinal direction of the bag body 2. This repair device 4 has a pair of upper and lower pressing plates 5, 6, 7 that extend in a band-like shape and have multiple fastening holes 53, 54, 63, 64, 73, 74 formed therein, and a plurality of fastening fittings 8 that are attached to the through hole 11 and fastening holes 53, 54, 63, 64, 73, 74 drilled in the rubber bag body 1 and fasten the pair of upper and lower pressing plates 5, 6, 7 while sandwiching a portion of the rubber bag body 1.

[0047] The repair device 4 is used for emergency repair when breakage or crack damage occurs near the base of the deflector, and the pair of upper and lower presser plates 5, 6, 7 are attached to the rubber bag body 1 so that the damaged area D is surrounded by the pair of upper and lower presser plates 5, 6, 7 and the leading edge 31 of the deflector 3. After attachment, the damaged area D is located between the first presser plate 5 and the leading edge 31 of the deflector 3, and is also located between the second presser plate 6 and the third presser plate 7. Each component will be described below.

[0048] In this embodiment, as described above, the pair of upper and lower presser plates is made up of a plurality of sets, including a pair of upper and lower first presser plates 5 attached along the longitudinal direction of the bag body 2, a pair of upper and lower second presser plates 6 attached so that one end is continuous with one end of the pair of upper and lower first presser plates 5 and the other end reaches the leading edge 31 of the deflector 3, and a pair of upper and lower third presser plates 7 attached so that one end is continuous with the other end of the pair of upper and lower first presser plates 5 and the other end reaches the leading edge of the deflector 3. Here, "attached so as to be continuous" means a state in which the end faces of the respective presser plates are attached so as to be in surface contact with each other, as shown in Figs. 4 and 5.

[0049] The upper and lower presser plates 51, 52 constituting the upper and lower pair of first presser plates 5 are both steel plates having a rectangular shape in a plan view. The presser plates 51, 52 are provided with fastening holes 53, 54 in a straight line at a predetermined interval. The steel plate is preferably SS400 and is preferably coated with an anti-rust paint, but is not limited to this.

[0050] The upper and lower presser plates 61, 62 constituting the pair of upper and lower second presser plates 6 are both belt-shaped members bent in an L-shape and having the same width as the presser plates 51, 52, with fastening holes 63, 64 provided at predetermined intervals along the longitudinal direction. The presser plates 61, 62 are composed of portions 61a, 62a attached to the through hole 11 drilled along the longitudinal direction of the bag body 2, and portions 61b, 62b connected to the portions 61a, 62a at an angle of about 45 degrees. Both ends of the presser plates 61, 62 are formed at an acute angle of about 45 degrees.

[0051] When temporarily fixing the presser plates 61, 62 to the rubber bag body 1, both a step of temporarily fixing the portions 61a, 62a to the through holes drilled in the longitudinal direction drilling step and a step of temporarily fixing the portions 61b, 62b to the through holes drilled in the cross direction drilling step are performed. When performing these steps, the presser plates 61, 62 are attached so that one end is continuous with one end of the presser plates 51, 52 (so that the end faces are in surface contact) and the other end reaches the tip edge 31 of the deflector 3. The shape of the presser plates 61 and 62 is merely an example, and they may be formed, for example, in a trapezoidal shape when viewed from above.

[0052] The upper and lower pressing plates 71, 72 constituting the upper and lower pair of third pressing plates 7 have a common shape (symmetrical shape) to the above-mentioned pressing plates 61, 62, and therefore common reference numerals are used and a description thereof is omitted. The shapes of the upper and lower pair of pressing plates 6, 7 are determined according to the damage state, etc. Therefore, the pressing plates 61, 62 and the pressing plates 71, 72 do not necessarily have to be symmetrical shapes.

[0053] For example, if the length of the damaged portion D is about 1400 mm and the distance from the tip edge 31 of the deflector 3 is about 50 mm, the pressing plates 51 and 52 are made of a steel plate having a longitudinal dimension of 1200 mm, a width dimension of 150 mm, and a thickness of 9 mm, and fastening holes of 22 mm are formed at the center of the width direction at 100 mm intervals along the longitudinal direction (fastening holes at both ends are 10 mm apart). AttachedThe presser plates 61, 62, 71, 72 were made by welding two steel plates with a width of 150 mm and a thickness of 9 mm so as to be bent at a 45 degree angle into a dogleg shape. The length of the center line of the parts 61a, 71a attached in the longitudinal direction was approximately 275 mm, and the length of the center line of the parts 61b, 71b attached in the cross direction was approximately 247 mm. Then, 22 mm fastening holes were provided at 100 mm intervals (the fastening holes at both ends) along the longitudinal direction. Hole It is possible to adopt a structure in which the fastening holes are provided at regular intervals (75 mm apart only). Note that these values ​​are merely examples and can be changed as appropriate depending on the size of the damaged area D and the properties of the rubber bag body, and the fastening holes do not necessarily have to be provided at equal intervals.

[0054] In this way, when there are multiple pairs of upper and lower pressure plates, the installation work can be performed one pair at a time in the second step, facilitating installation on the rubber bag body 1. Furthermore, since the upper and lower pairs of pressure plates 5, 6, 7 are installed so as to be continuous, but are separate bodies, even if the rubber bag body 1 is subjected to the collision of a water current or a floating object, the rubber bag body 1 deforms so as to be curved between the pressure plates (division parts), and deformation of each pressure plate is suppressed.

[0055] Of the upper pressing plate 51 constituting the upper and lower pair of first pressing plates 5, the surface on the side in contact with the rubber bag body 1 is preferably provided with a protrusion 55 (protrusion A) extending along one side edge of the pressing plate 51 and a protrusion 56 (protrusion B) extending along the other side edge of the pressing plate 51, as shown in Fig. 4(B). The protrusions 55, 56 are provided parallel to each other. Each of the fastening holes 53 is formed so as to open between one protrusion 55 (protrusion A) and the other protrusion 56 (protrusion B). Similarly, the surface of the lower pressing plate 52 that contacts the rubber bag body 1 is preferably provided with a protrusion 57 (protrusion C) extending along one side edge of the pressing plate 52 and a protrusion 58 (protrusion D) extending along the other side edge of the pressing plate 52, as shown in Fig. 5(A). The protrusions 57, 58 are provided parallel to each other. Each of the fastening holes 54 is formed so as to open between one protrusion 57 (protrusion C) and the other protrusion 58 (protrusion D). Although each of the protrusions 55, 56, 57, and 58 can be formed by, for example, welding reinforcing bars, the protrusions may be formed by a processing method other than welding reinforcing bars.

[0056] Fig. 4(C) is a cross-sectional view taken along line C-C in Fig. 4(A), and all cross-sections are the same as shown in Fig. 4(A) at three points along line C-C. Fig. 5(C) is a cross-sectional view taken along line C-C in Fig. 5(A), and all cross-sections are the same as shown in Fig. 5(A) at three points along line C-C. By providing such protrusions 55, 56, 57, and 58, when the rubber bag body 1 is sandwiched between the pair of pressing plates 5, each of the protrusions 55, 56, 57, and 58 bites into the rubber bag body 1 and functions as a stopper. Therefore, the pressing plate 5 is less likely to slip relative to the rubber bag body 1.

[0057] Furthermore, in this embodiment, so that the rubber bag body 1 is sandwiched between a pair of pressure plates 5 in a wavy curved manner, the distance between one protrusion 55 (protrusion A) and the other protrusion 56 (protrusion B) provided on one of the pair of pressure plates (upper pressure plate 51) is set wider than the distance between one protrusion 57 (protrusion C) and the other protrusion 58 (protrusion D) provided on the other pressure plate (lower pressure plate 52). For example, when the width dimensions of the upper and mask side presser plates are both 150 mm, the upper presser plate has protrusions 55, 56 spaced at intervals of about 110 mm, and the lower presser plate has protrusions 57, 58 spaced at intervals of about 70 mm. Each of the protrusions 55, 56, 57, 58 is made of a reinforcing bar having a diameter of 10 mm. Note that these values ​​are merely examples and can be changed as appropriate depending on the size of the damaged portion D and the properties of the rubber bag body. Contrary to this embodiment, the spacing between the protrusions on the lower presser plate may be set wider than the spacing between the protrusions on the upper presser plate.

[0058] When the protrusions 55, 56, 57, and 58 are provided at such intervals, when the rubber bag body 1 is sandwiched between the pair of pressing plates 5, each protrusion bites into the rubber bag body 1, causing the rubber bag body to bend in a wave shape. Therefore, the pressing plates 5 are even less likely to shift relative to the rubber bag body 1.

[0059] The upper and lower pair of second pressure plates 6 and the upper and lower pair of third pressure plates 7 are also provided with protrusions 65, 66, 67, 68, 75, 76, 77, 78 and fastening holes 63, 64, 73, 74, similar to the upper and lower pair of first pressure plates 5, but as their installation positions, spacing, dimensions, functions, etc. are the same as those described above, explanations will be omitted.

[0060] <How to use (device)> The method of using the repair device 4 is as explained in the repair method according to the present invention, but briefly, when a rubber dam with deflector is damaged near the base of the deflector, a through hole is made to surround the damaged portion, and then a pair of upper and lower presser plates 5, 6, 7 is attached to surround the damaged portion D. Since a part of the rubber bag 1 is sandwiched between the pair of upper and lower presser plates 5, 6, 7, it is possible to prevent water from entering the rubber bag 1 from the damaged portion D and to prevent air or water leakage from inside the rubber bag 1, and also to suppress the progression of cracks.

[0061] When using the repair device 4, as described in the second step, it is preferable to improve watertightness and airtightness by filling the gap between the rubber bag body 1 and the pair of upper and lower pressing plates 5, 6, 7 with caulking 9. In addition, the repair device 4 can achieve effects common to those achieved when the above-mentioned repair method is applied. [Industrial Applicability]

[0062] The repair method and repair device according to the present invention are techniques that can be widely applied to existing rubber dams with deflectors that are installed and operated in many locations both in Japan and overseas. [Explanation of symbols]

[0063] 1 Rubber bag 11 Through hole 2 Bags 21 Upper part 22 Lower part 3 Deflector 31 Tip edge 4 Repair equipment 5 Upper and lower pair of first pressure plates 51 Presser plate (upper side) 52 Presser plate (lower side) 53 Fastening hole (top side) 54 Fastening hole (bottom side) 55 Projection (top side) 56 Projection (top side) 57 Projection (bottom side) 58 Projection (bottom side) 6 Upper and lower pair of second pressure plates 61 Presser plate (upper side) 61a Part that can be attached in the longitudinal direction 61b Parts attached in the cross direction 62 Presser plate (bottom side) 62a Part that can be attached in the longitudinal direction 62b Parts attached in the cross direction 63 Fastening hole (top side) 64 Fastening hole (bottom side) 65 Projection (top side) 66 Projection (top side) 67 Projection (bottom side) 68 Projection (bottom side) 7 Upper and lower pair of third pressure plates 71 Presser plate (upper side) 72 Pressing plate (bottom side) 73 Fastening hole (top side) 74 Fastening hole (bottom side) 75 Projection (top side) 76 Projection (top side) 77 Projection (bottom side) 78 Projection (bottom side) 8 Fastening hardware 81 Volts 82 Nut 9. Caulking D Damaged area (damaged part)

Claims

1. A method for repairing a rubber dam with a deflector when a rubber bag body having a cylindrical bag body with both ends sealed and a deflector protruding from the bag body along the longitudinal direction of the bag body is damaged near the base of the deflector, comprising the steps of: a first step of drilling a plurality of through holes at predetermined intervals in the rubber bag body so that the damaged area is surrounded by the through holes and a leading edge of the deflector; a second step of arranging a pair of upper and lower presser plates, each having a plurality of fastening holes formed at a predetermined interval, from the upper surface side and the lower surface side of the rubber bag body so that the fastening holes communicate with the through hole, and then inserting fastening metal fittings into the fastening holes and the through hole to temporarily fasten the rubber bag body; A third step of filling a gap between the rubber bag body and the pair of upper and lower pressing plates with caulking; and a fourth step of fixing a portion of the rubber bag body and the caulking in a sandwiched state between the pair of upper and lower pressure plates by fully tightening the fastening fittings inserted into the fastening holes and the through holes.

2. The first step comprises: a longitudinal hole punching step of drilling a plurality of through holes at predetermined intervals along the longitudinal direction of the bag body at a position spaced a certain distance from the tip edge of the deflector; a cross-direction perforation step of perforating a plurality of through holes at predetermined intervals along a direction intersecting the longitudinal direction of the bag body between a position spaced a certain distance from the tip edge of the deflector and the tip edge of the deflector; Including, The upper and lower pressing plates are provided in a plurality of sets, The second step is a step of temporarily fixing one or more sets of the pair of upper and lower pressing plates to the through holes formed in the longitudinal direction drilling step; a step of temporarily fixing one or more sets of the pair of upper and lower pressing plates to the through holes formed in the cross direction drilling step; 2. The method for repairing a rubber dam with a deflector according to claim 1, further comprising the steps of:

3. A rubber dam with a deflector, which includes a rubber bag body having a cylindrical bag body with both ends sealed and a deflector protruding from the bag body along the longitudinal direction of the bag body, is repaired when the rubber bag body is damaged near the base of the deflector, and the repair device comprises: a pair of upper and lower pressing plates extending in a band shape, the pressing plates having a plurality of fastening holes formed therein, the pressing plates being attached so as to sandwich the rubber bag from above and below; a plurality of fastening fittings that are fitted into the through holes and the fastening holes formed in the rubber bag and fasten the pair of upper and lower pressing plates together in a state in which a part of the rubber bag is sandwiched therebetween, The pair of upper and lower pressing plates are attached to the rubber bag body so that the damaged area is surrounded by the pair of upper and lower pressing plates and the leading edge of the deflector. A repair device for a rubber dam with a deflector.

4. The through holes are drilled in the rubber bag at predetermined intervals so that the damaged area is surrounded by the through holes and the leading edge of the deflector.

4. The repair device for a rubber dam with a deflector according to claim 3.

5. The upper and lower pairs of pressing plates are made up of multiple sets. a pair of upper and lower first pressing plates attached along the longitudinal direction of the bag body; a pair of upper and lower second presser plates, one end of which is attached so as to be continuous with one end of the pair of upper and lower first presser plates, and the other end of which is attached so as to reach the tip edge of the deflector; a pair of upper and lower third presser plates, one end of which is attached so as to be continuous with the other end of the pair of upper and lower first presser plates, and the other end of which is attached so as to reach the tip edge of the deflector; have 4. The repair device for a rubber dam with a deflector according to claim 3.

6. a protrusion A extending along one side edge and a protrusion B extending along the other side edge are provided on a surface of one of the pair of upper and lower pressing plates that contacts the rubber bag body, The fastening hole formed in one of the pressing plates is The opening is formed between the protruding portion A and the protruding portion B, a protrusion C extending along one side edge and a protrusion D extending along the other side edge are provided on a surface of the other of the pair of upper and lower pressing plates that contacts the rubber bag body, The fastening hole formed in the other of the pressing plates is An opening is formed between the protruding portion C and the protruding portion D.

6. The repair device for a deflector-equipped rubber dam according to claim 3, wherein the repair device is a rubber dam with a deflector.

7. A repair device for a rubber dam with a deflector as described in claim 6, characterized in that the distance between the protrusions A and B is set wider than the distance between the protrusions C and D so that the rubber bag is sandwiched between the pair of upper and lower pressure plates in a corrugated curved shape.

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