Repair method and repair device for rubber dam with deflector

Abstract

To provide an emergency repair method and repair device when damage such as breakage or crack 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 predetermined intervals in the rubber bag body 1 so that the damaged area is surrounded by the multiple through holes 11 that penetrate 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 multiple fastening holes 59, 69 formed at predetermined intervals, are placed from the top and bottom sides of the rubber bag body 1, and then 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 portion of the rubber bag body 1 and the caulking 9 are sandwiched and fixed between the pair of upper and lower pressure plates 5, 6, 7.

Description

[Technical Field]

[0001] The present invention relates to a method and device for repairing a rubber dam with a deflector, and more particularly to a repair method for temporarily repairing breaks or cracks that occur near the base of a deflector, and a rubber dam repair device suitable for use in the 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 irrigation and drainage control. A rubber weir consists of a cylindrical, inflatable rubber-coated fabric bag (hereafter referred to as "rubber bag") placed so that its longitudinal direction (weir axis direction) crosses the river or other waterway, with its bottom fixed to a concrete foundation (floor slab) laid on the riverbed or waterway bottom, and both spindle-shaped ends fixed to weir pillar walls installed on the riverbank or other waterway. The rubber bag is hollow, and when fluid (air or water) is supplied to it, the rubber bag expands and stands up, blocking the water flow, and when fluid is discharged, the rubber bag deflates and falls down.

[0003] Some rubber weirs have protrusions called deflectors or fins (hereafter referred to as "deflectors") to prevent vibration of the rubber bag. The deflectors are installed along the length of the rubber bag so that they are located approximately midway along the downstream side of the rubber bag when the rubber weir is installed in a river or other waterway. Water flowing over the top of the rubber bag is separated from the surface of the bag body by the deflectors, creating an air chamber between the surface of the bag body and the overflowing water, thereby suppressing vibration of the rubber bag.

[0004] Rubber weirs are easier to install and maintain than steel gates, and are currently installed and in use in many locations. Rubber weirs 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 because deterioration over time is inevitable, repair methods for such cases must be considered. 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 flaws (cracks) include the technology shown in Patent Document 3, a rubber plug repair method, and a shell plug repair method. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-2394 [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 the periphery of the patch material to be tightly adhered to the bag body using adhesives or thermal vulcanization, making joining difficult in areas such as 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 that are easily affected by vibration.In addition, while the rubber plug repair method can be considered for penetrating scratches up to about 10-30 mm, and the shell plug repair method 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 to the rubber bag is discovered during inspection work, a repair method (partial repair) will be considered depending on the degree and scale of the damage, but if the damage is too severe to technically repair, or if it is more cost-effective than repairing, it will be replaced with a new one. However, if preparations for the renewal work, such as procuring rubber bags, take time, emergency repairs may be considered as a temporary restoration measure until the renewal work can begin, in order to avoid the adverse effects of the rubber weir malfunctioning.For example, during periods when water intake is highly necessary, such as irrigation season, the impact of the rubber weir not functioning would be significant, so there is a strong need to carry out emergency measures to temporarily restore the weir.

[0008] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a method and device for emergency repair when damage such as breakage or cracking 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 for repairing a rubber dam with a deflector when a rubber bag body having a tubular 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, and is characterized by sequentially carrying out the following four steps. That is, this repair method is as follows: 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 penetrating the rubber bag body and the leading edge of the deflector; a second step of placing a pair of upper and lower presser plates, each having a plurality of fastening holes formed at predetermined intervals, 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 them; 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 portion of the rubber bag body and the caulking in a sandwiched state between the pair of upper and lower presser plates by fully tightening the fastening metal fittings inserted into the fastening holes and the through holes; The following will be implemented.

[0010] The repair device for a rubber dam with a deflector of the present invention is a repair device for a rubber dam with a deflector, which is provided with a rubber bag body having a tubular bag body with both ends sealed and a deflector protruding from the bag body along the longitudinal direction of the bag body, a pair of upper and lower band-like pressing plates each having a plurality of fastening holes formed therein and attached to the rubber bag so as to sandwich the rubber bag from above and below; and a plurality of fastening fittings that are attached to the through holes and fastening holes drilled in the rubber bag body and fasten the pair of upper and lower pressure plates together while sandwiching a portion of the rubber bag body. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide an emergency repair method and repair device for when damage such as breakage or cracking occurs near the base of the deflector of a rubber dam. The present invention can be applied to locations where emergency repairs are difficult using conventional techniques, such as near the base of a rubber dam deflector, and can prevent water from entering the rubber bag from the damaged location (hereinafter sometimes referred to as the "damaged area") and air or water leakage from within the rubber bag. In addition, a pair of upper and lower pressure plates attached so as to surround the damaged area can suppress damage such as the progression of cracks. This invention is essentially positioned as a medium- to short-term emergency repair method and device for, say, about a year, in the event that future replacement is planned, and is not intended for permanent use. The purpose of this invention is not to completely restore the original functionality of the rubber dam, but to temporarily restore it to a certain level. By applying this invention, the rubber bag may become somewhat distorted in shape, resulting in some areas where the original dam height cannot be secured, but this technology is particularly useful as a temporary restoration method during periods when water intake is highly necessary, such as during irrigation seasons. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a diagram showing the internal configuration of a repair device according to the present invention, and is also an explanatory diagram of the state in which the repair device is attached to a rubber bag body. [Figure 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. [Figure 3] FIG. 2 is a perspective view showing the configuration of each of three pairs of upper and lower presser 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, where (A) is a plan view from 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). [Figure 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 shown from the opposite surface, that is, the lower surface side, and (C) is an enlarged view of the cross section taken along line CC shown in (A). [Figure 6] This is an image diagram of a repair device according to the present invention attached to a rubber dam installed in a river, and in particular shows the state in which the repair device according to the present invention is attached to a damaged area near the end of a spindle-shaped rubber bag fixed to the dam pillar wall installed on the riverbank. DETAILED DESCRIPTION OF THE INVENTION

[0013] The present invention relates to a method and device for repairing an existing rubber dam with a deflector, which targets the case where 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 damage occurs near the base of the deflector 3 is not limited to the case where damage occurs near the connection between the bag body 2 and the deflector 3, 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 longitudinal ends of the rubber bag 1 are sealed in a spindle shape. This 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 and operating a blower, compressor, pump, or the like to this supply / discharge port, fluid can be supplied into the interior of rubber bag 1 through the supply / discharge port, causing rubber bag 1 to expand into a cylindrical shape. Conversely, by suctioning or naturally discharging the fluid from the interior of rubber bag 1 through the supply / discharge port, rubber bag 1 can be deflated into a flat plate.

[0015] The rubber bag 1 is positioned so that its longitudinal direction crosses the direction of water flow and the deflector 3 is located in the middle of the downstream side, with its bottom fixed to the concrete foundation (floor slab). The deflector 3 is provided along the longitudinal direction of the rubber bag 1 so that it will be located approximately in the middle of the downstream side of the rubber bag 1 when the rubber weir is installed in a river or the like. When the rubber bag 1 is inflated in this installed state, it becomes upright, and the cylindrically inflated rubber bag 1 can block the water flow. As a result, the deflector 3 separates the overflowing water that has flowed over the top of the rubber bag 1 from the surface of the bag body 2 approximately in the middle of the downstream side, thereby suppressing vibration of the rubber bag 1.

[0016] Next, an example of the configuration of the repair device 4 used in the repair method will be briefly described to the extent necessary to explain the method for repairing a deflector-equipped rubber dam according to the present invention. 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 portion of the rubber bag body 1 from above and below, and includes a pair of upper and lower presser plates 5, 6, and 7 extending in a strip shape (rail shape) and having a plurality of fastening holes 53, 54, 63, 64, 73, and 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, and 74 drilled in the rubber bag body 1, and fastening the pair of upper and lower presser plates 5, 6, and 7 in a state in which a portion of the rubber bag body 1 is sandwiched between them. As will be described later, after the repair device 4 is temporarily fastened to the rubber bag body 1, caulking 9 is filled between the rubber bag body 1 and the pair of upper and lower presser plates 5, 6, and 7.

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

[0019] Each 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 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 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 joined together, but each pressure plate is actually separate and distinct, 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 using fastening fittings 8 so as to sandwich a portion 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 make up each pair are formed symmetrically in terms of their positions and spacing with respect to the rubber bag body 1. In other words, the upper pressure plates 51, 61, 71 and the lower pressure plates 52, 62, 72 are arranged 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 make up each pair communicate with each other when the two plates are placed one on top of the other.

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

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

[0023] The fastening hardware 8 is composed 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 intended as a temporary restoration measure until the condition is such that the renewal work can be started. Therefore, it is desirable 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 or the like, 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, which will be described later, 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 in 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 a drill tool is used to drill through holes 11 at predetermined intervals in the rubber bag body 1 so that the damaged area D is surrounded by the plurality of 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 to extend substantially parallel to the longitudinal direction of the bag body 2. Each of the through holes 11 is drilled so that the damaged area D is surrounded by the leading edge 31 and the plurality of through holes 11.

[0027] More specifically, this process includes a longitudinal drilling step and a cross-direction drilling step, and is carried out by performing these steps. The cross-direction drilling step is performed twice to surround the damaged area D. Note that these steps may be performed in any order, but preferably, the longitudinal drilling step is performed first, then the first cross-direction drilling step is performed near one of the through holes drilled in the longitudinal drilling step (e.g., the left bank side), and then the second cross-direction drilling step is performed near the other of the through holes drilled in the longitudinal drilling step (e.g., the right bank side).

[0028] The longitudinal hole drilling step is a process of drilling 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 fixed distance from the leading edge 31 of the deflector 3. By performing this process, a plurality of through holes 11 are drilled 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, 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 direction perforating step is a process of perforating a plurality of through holes 11 at predetermined intervals along a direction intersecting the longitudinal direction of the bag body 2 between a position spaced a certain distance from the leading edge 31 of the deflector 3 (a position on an extension of a line connecting the positions where the through holes 11 were perforated in the longitudinal direction perforating step) and the leading 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 forming 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 the same as the intervals between the fastening holes 53, 54, 63, 64, 73, and 74 provided in the presser plates 5, 6, and 7. In practice, the through holes 11 are drilled in the rubber bag 1 at intervals equivalent to the intervals between the fastening holes 53, 54, 63, 64, 73, and 74 formed in the presser plates 5, 6, and 7 that have already been manufactured in the factory (for example, intervals that are arbitrarily set between 75 mm and 100 mm). At this time, the through holes 11 are drilled through the bag main body 2, opening on the top and bottom surfaces, with the upper portion 21 and the lower portion 22 of the bag main body 2 in surface contact with each other. By carrying out this process, multiple 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 multiple 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 consisting of a pressure plate with multiple fastening holes 53, 54, 63, 64, 73, 74 formed at a predetermined interval, are positioned from the top and bottom 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 and temporarily fasten the fastening fittings 8 into the fastening holes 53, 54, 63, 64, 73, 74 and some of the through holes 11 to the extent that it does not interfere with the subsequent third step. In the illustrated example, the fastening fittings 8 are inserted by bolts 81 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 subsequent third step, the fastening fittings 8 may be inserted and temporarily fastened into all of the fastening holes and through holes 11. In other words, in this step, it is not necessary to insert and temporarily fasten the fastening fittings 8 into all of the fastening holes and through holes 11; as long as it is possible to temporarily fasten the pair of upper and lower presser plates 5, 6, 7 to the extent that it does not interfere with the subsequent third step, it is also possible to temporarily fasten only some 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 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 drilling step (hereinafter referred to as the "transverse temporary fixing step"), and is carried out by performing these steps. The longitudinal temporary fixing step and the transverse temporary fixing step may be performed in any order. 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 start with. However, in the case where there are three pairs of upper and lower presser plates 5, 6, and 7 as in this embodiment, they are attached so that they are continuous, so it is easier to attach them starting with the first presser plate 5 of the upper and lower pair.

[0033] First, when temporarily fastening from the first pressure plate 5, pressure plate 51 having fastening holes 53 formed therein is placed from the top side of the rubber bag body 1 so that fastening holes 53 communicate with the through holes 11 drilled in the longitudinal drilling step, and pressure plate 52 having fastening holes 54 formed therein is placed from the bottom side of the rubber bag body 1 so that fastening holes 54 communicate with the through holes 11 drilled in the longitudinal drilling step, and then bolts 81 (fasteners 8) are inserted into the fastening holes 53, 54 and the through holes 11 to temporarily fasten them. Next, to temporarily fasten the second presser plate 6, presser plate 61 having fastening holes 63 formed therein is placed from the upper surface side of the rubber bag body 1 so that the fastening holes 63 communicate with the through holes 11 drilled in the longitudinal drilling step and the transverse drilling step, and presser plate 62 having fastening holes 64 formed therein is placed from the lower surface side of the rubber bag body 1 so that the fastening holes 64 communicate with the through holes 11 drilled in the longitudinal drilling step and the transverse drilling step, and then bolts 81 (fasteners 8) are inserted into the fastening holes 63, 64 and the through holes 11 to temporarily fasten them. By performing these steps, portions 61a, 62a of presser plates 61, 62 are arranged along the longitudinal direction of bag body 2, and portions 61b, 62b of presser plates 61, 62 are arranged in a direction transverse to the longitudinal direction. Finally, the third presser plate 7 is temporarily fixed, but the procedure is the same as the procedure for temporarily fixing the second presser plate 6 described above, so the explanation 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 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 to avoid gaps. In this embodiment, the pair of upper and lower presser plates consists of three sets of presser plates 5, 6, and 7, but this is not limited to this and can be changed as appropriate depending on the position and size of the damaged area D, the weight of the presser plates, etc. For example, the presser plates 51 and 52 that make up the first presser plate 5 are long members, but the presser plates 51 and 52 that are attached in the longitudinal direction of the bag body 2 may be further divided into multiple presser plates, that is, divided into multiple sets. In this case, the longitudinal temporary fixing step is a step of temporarily fixing the multiple sets of presser plates to the through holes drilled in the longitudinal hole drilling step. Similarly, the portions 61b, 62b, 71b, 72b of the presser plates 61, 62, 71, 72 attached in the transverse direction of the bag body 2 may be further divided into a plurality of presser plates, that is, divided into a plurality of sets. In this case, the transverse direction temporary fixing step is a step of temporarily fixing the plurality of sets of presser plates to the through holes drilled in the transverse direction hole making step.

[0035] Instead of forming each of the upper and lower presser plates constituting the pair of upper and lower presser plates integrally from a single piece of steel, as in this embodiment, the presser plates are divided into a plurality of presser plates to form a plurality of sets of presser plates, and each set is attached separately (by performing the second step), which facilitates attachment (temporary fastening) to the rubber bag body 1. Furthermore, because the first to third presser plates 5, 6, and 7 are each separate after attachment, even if the rubber bag body 1 is hit by a water current or a floating object, the rubber bag body 1 deforms so as to curve between the presser plates 5, 6, and 7 (at the divisions), thereby suppressing deformation of each presser plate.

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

[0037] <3rd process> This 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 retaining 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 primarily from synthetic resin materials such as silicone resins, acrylic resins, and urethane resins, with fillers, flame retardants, and the like.

[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 pressure plates 5, 6, and 7 through 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, and 74 or through holes 11. Furthermore, when the fastening fittings 8 are inserted into some of the fastening holes and through holes 11 and temporarily fastened, 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 poured through the unused 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 through-hole 11 are finally tightened to fix a portion of the rubber bag body 1 and the caulking 9 sandwiched between the pair of upper and lower pressing plates 5, 6, 7. Note that if the fastening fittings 8 were inserted into only some of the fastening holes and through-holes 11 and temporarily tightened in the second step, the fastening fittings 8 are now inserted into all of the remaining fastening holes and through-holes 11 to tighten them.

[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 is airtight and watertight is formed surrounding the damaged area D, preventing water from entering the rubber bag 1 from the damaged area D and preventing air or water leakage from inside the rubber bag 1. In addition, by solidifying the area around 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 of the state after the present repair method has been applied to a rubber weir with a deflector installed in a river that has sustained penetration damage near the base of the deflector near the weir pillar wall, i.e., an image of the state with the repair device 4 according to the present invention attached. After the above preparations are completed, the first step is carried out to drill a through hole in the rubber bag 1 so as to surround the damaged area D, and then the second and third steps are carried out to fill the spaces between the retaining plates 5, 6, and 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 carry out these steps.

[0042] <Effects (Methods)> The repair method of the present invention can prevent water from entering the rubber bag 1 through the damaged area D and air or water leakage from inside the rubber bag 1, and can also suppress the progression of cracks. Unlike conventional techniques that use adhesives or thermal vulcanization to attach a repair material, this method involves drilling through holes 11 in the rubber bag 1 and firmly fastening a pair of upper and lower steel pressure plates 5, 6, and 7. This method can be applied even to areas where joining is difficult, 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 of the present invention is not a repair method that directly injects repair material into the damaged area or attaches a repair tool, as in conventional repair methods using rubber plugs or shell plugs. The present invention is a technology that prevents air leakage, water leakage, and water intrusion by clamping the periphery of the damaged area D with a pressure plate to make the periphery of the damaged area airtight (creating an airtight area between the damaged area and the inside of the bag body). The repair method according to the present invention is based on the novel idea of ​​drilling multiple through holes 11 in a cracked or other damaged rubber bag 1. The present invention is basically an emergency repair method that is applied in situations where future renewal involving the replacement of the entire rubber bag 1 is planned, so drilling through holes 11 in the rubber bag 1 does not pose any problems.

[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 presser plates 5, 6, and 7 attached along the multiple through holes 11 penetrating the rubber bag 1 and the leading edge 31 of the deflector 3. In other words, the weight of the presser plates is prevented from causing the leading edge side of the deflector 3 to sag as much as possible. In addition, the presser plates 5, 6, and 7 are formed from strip-shaped members and are attached so as to surround the damaged area D rather than to cover and hide the entire damaged area D, leaving the portion of the rubber bag 1 exposed to the water flow, thereby minimizing the impairment of the function of the deflector 3.

[0045] <Repair equipment> 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 includes 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 is attached so as to sandwich a portion of the rubber bag body 1 from above and below, and comprises a pair of upper and lower band-like pressing plates 5, 6, 7 having multiple fastening holes 53, 54, 63, 64, 73, 74 formed therein, and a plurality of fastening fittings 8 which are attached to the through holes 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 repairs 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 multiple 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 that the end faces of the respective presser plates are attached so as to be in surface contact with each other, as shown in Figures 4 and 5.

[0049] The upper and lower presser plates 51, 52 constituting the pair of upper and lower first presser plates 5 are both steel plates having a rectangular shape in a plan view. Fastening holes 53, 54 are formed in the presser plates 51, 52 in a straight line at predetermined intervals. 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 bent in a dogleg shape and strip-like members whose width is the same as that of presser plates 51, 52, and have fastening holes 63, 64 formed at predetermined intervals along the longitudinal direction. Presser plates 61, 62 are composed of portions 61a, 62a that are attached to through-holes 11 drilled along the longitudinal direction of bag body 2, and portions 61b, 62b that are connected to portions 61a, 62a at an angle of approximately 45 degrees. Both ends of presser plates 61, 62 are formed at an acute angle of approximately 45 degrees.

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

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

[0053] For example, if the length of the damaged portion D is about 1400 mm and the distance from the leading edge 31 of the deflector 3 is about 50 mm, the presser 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 formed by providing 22 mm fastening holes at 100 mm intervals along the longitudinal direction (only the fastening holes at both ends are 75 mm apart). Two 9mm thick steel plates, each 150mm in diameter, are welded together so that they are bent at a 45-degree angle into a dogleg shape, with the longitudinally attached portions 61a and 71a measuring approximately 275mm in length along the center line and the transversely attached portions 61b and 71b measuring approximately 247mm in length along the center line, and 22mm fastening holes are provided at 100mm intervals along the longitudinal direction (75mm intervals for the fastening holes at both ends 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, 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, although the upper and lower pairs of pressure plates 5, 6, and 7 are installed so as to be continuous, they are separate bodies, so that even if the rubber bag body 1 is hit by a water current or a floating object, the rubber bag body 1 deforms so as to curve between the pressure plates (dividing portions), thereby suppressing deformation of each pressure plate.

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

[0056] FIG. 4(C) is a cross-sectional view taken along line CC shown in FIG. 4(A), and as shown in three places in FIG. 4(A), all cross-sections are the same. FIG. 5(C) is a cross-sectional view taken along line CC shown in FIG. 5(A), and as shown in three places in FIG. 5(A), all cross-sections are the same. By providing these protrusions 55, 56, 57, and 58, when the rubber bag body 1 is sandwiched between the pair of presser 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 presser plate 5 is less likely to slip relative to the rubber bag body 1.

[0057] Furthermore, in this embodiment, 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) so that the rubber bag body 1 is sandwiched between the pair of pressure plates 5 in a wavy curved manner. For example, if the width dimensions of both the upper and lower pressure plates are 150 mm, protrusions 55, 56 are provided on the upper pressure plate at intervals of approximately 110 mm, and protrusions 57, 58 are provided on the lower pressure plate at intervals of approximately 70 mm. Each of protrusions 55, 56, 57, 58 is made of rebar with a diameter of 10 mm. Note that these values ​​are merely examples and can be changed as appropriate depending on the size of damaged area D, the properties of the rubber bag, etc. Contrary to this embodiment, the spacing between protrusions on the lower pressure plate may be set wider than the spacing between protrusions on the upper pressure 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 presser plates 5, each protrusion bites into the rubber bag body 1, causing the rubber bag body to bend in a wave-like shape. Therefore, the presser plates 5 are even less likely to slip relative to the rubber bag body 1.

[0059] The pair of upper and lower second pressure plates 6 and the pair of upper and lower 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 pair of upper and lower first pressure plates 5, but their installation positions, spacing, dimensions, functions, etc. are the same as those described above, so 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 drilled to surround the damaged area, and then a pair of upper and lower presser plates 5, 6, and 7 are attached to surround the damaged area D. A part of the rubber bag 1 is sandwiched between the pair of upper and lower presser plates 5, 6, and 7, which prevents water from entering the rubber bag 1 from the damaged area D and prevents air and water from leaking from inside the rubber bag 1, and also suppresses 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 holes 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 (bottom 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 Longitudinal attachment part 61b Parts attached in the cross direction 62 Presser plate (bottom side) 62a Longitudinal attachment part 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 Presser 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 tubular 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 penetrating the rubber bag body and the 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 predetermined intervals, 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 metal fittings into the fastening holes and the through holes to temporarily fasten them; 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 a longitudinal perforation step of drilling a plurality of through holes at predetermined intervals along the longitudinal direction of the bag body at positions spaced a predetermined distance from the leading edge of the deflector; a cross-direction perforation step of drilling a plurality of through holes at predetermined intervals along a direction crossing the longitudinal direction of the bag body between a position spaced a predetermined distance from the tip edge of the deflector and the tip edge of the deflector; Including, The upper and lower pairs of presser plates are made up of a plurality of sets, The second step is a step of temporarily fixing one or more sets of the pair of upper and lower presser plates to the through holes formed in the longitudinal drilling step; 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 cross-direction drilling step; 2. The method for repairing a rubber dam with a deflector according to claim 1, further comprising:

3. A repair device for a rubber dam with a deflector, comprising a rubber bag body having a tubular bag body with both ends sealed and a deflector protruding from the bag body along the longitudinal direction of the bag body, a pair of upper and lower band-like pressing plates each having a plurality of fastening holes formed therein and attached to the rubber bag so as to sandwich the rubber bag from above and below; a plurality of fastening fittings that are attached to the through holes and fastening holes formed in the rubber bag body and fasten the pair of upper and lower pressure plates together while sandwiching a portion of the rubber bag body.

4. The upper and lower pairs of presser plates are made up of a plurality of 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; 4. The repair device for a rubber dam with a deflector according to claim 3, further comprising:

5. 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 presser plates that contacts the rubber bag body, The fastening hole 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 is An opening is formed between the protrusion C and the protrusion D.

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

6. 6. A repair device for a rubber dam with a deflector as described in claim 5, 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 body is sandwiched between the pair of upper and lower pressure plates in a wave-shaped curve.

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