Construction Method of Seismic Flexible Joint

Abstract

To propose a construction method of a seismic flexible joint and a method for repairing a concrete member that can save materials and shorten the working time. 【Solution means】The construction method S100 of the seismic flexible joint includes a deteriorated part confirmation step S3 of confirming the deteriorated part by sounding the concrete area along both sides of the joint between the concrete members, a filler filling step S5 of filling the recess from which the concrete of the deteriorated part has been removed with a photocurable filler 26 to make it flat, a light irradiation step S6 of irradiating light having a wavelength at which the flattened photocurable filler hardens to harden the photocurable filler, and an expansion member fixing step SA of fixing an expansion member 21 that covers the joint via an anchor bolt 23. The expansion member is fixed in a state where part or all of it is in contact with the surface of the photocurable filler.

Description

Technical Field

[0001] The present invention relates to a construction method of a seismic flexible joint disposed at a joint portion of a concrete member. According to the law

Background Art

[0002] Conventionally, in a water channel tunnel formed of concrete, when reinforcing a joint portion connecting concrete members constituting the water channel tunnel, it is known to apply a seismic flexible joint (see Non-Patent Document 1). The construction method of this seismic flexible joint cuts (chips) the deteriorated concrete surfaces in the left and right regions of the joint to a predetermined range and a predetermined depth, applies mortar to the recessed region by cutting, and cures it. Then, the construction method of the seismic flexible joint secures the seismic performance and water stop performance of the joint portion by fixing the seismic flexible joint formed of a rubber sheet to the region made flat with mortar by an anchor. Also, for concrete members other than the water channel in service, a repair method of filling mortar into the deteriorated portion is adopted.

Prior Art Documents

Non-Patent Documents

[0003]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] ​However, in the construction method of the seismic flexible joint for concrete members and the concrete repair method, since mortar is used when repairing deteriorated parts, a curing time of 3 to 7 days is required to dry the mortar. On the other hand, in the construction method of the seismic flexible joint for reinforcing joints and the repair work of existing concrete structures, there is a desire to complete the work in a short time. Furthermore, when repairing, there is also a desire to save materials related to the repair.

[0005] In order to meet the above-mentioned demands, the present invention aims to propose a construction method of a seismic flexible joint that can save materials and shorten the working time. the law

Means for Solving the Problem

[0006] The construction method of the seismic flexible joint according to the present invention for solving the above problems includes a deteriorated part confirmation step of confirming the deteriorated part by sounding the concrete area along both sides of the joint between concrete members, a filler filling step of filling the recess formed by removing the concrete of the deteriorated part with a photocurable filler to make it flat, a light irradiation step of irradiating light with a wavelength at which the flattened photocurable filler cures to cure the photocurable filler, and a telescopic member fixing step of fixing a telescopic member covering the joint through an anchor bolt, and is a construction method of a seismic flexible joint, wherein the telescopic member is fixed in a state where part or all of it is in contact with the surface of the photocurable filler.

[0007] Also, the construction method of the seismic flexible joint according to the present invention includes a cutting step of cutting a predetermined range including the deteriorated part in the concrete area along both sides of the joint between concrete members to form a recess, a filler filling step of filling the recess with a photocurable filler to make it flat, a light irradiation step of irradiating light with a wavelength at which the flattened photocurable filler cures to cure the photocurable filler, and a telescopic member fixing step of fixing a telescopic member covering the joint through an anchor bolt, and is a construction method of a seismic flexible joint, wherein the telescopic member is fixed in a state where part or all of it is in contact with the surface of the photocurable filler. ​

[0009] In addition, the construction method of the earthquake-resistant flexible joint The law It is preferable to include, prior to the filler filling step, a cutting step of cutting the surface of the deteriorated portion, or a primer application step of applying a primer to the recessed portion. Moreover, as one example, the photocurable filler is preferably formed of a material that is cured by irradiation with ultraviolet light or light containing ultraviolet light. Effect of the Invention

[0010] Method for constructing earthquake-resistant flexible joint of the present invention According to the law According to this method, the photocurable filler to be filled into the deteriorated area can be hardened in a few minutes to a few tens of minutes. Therefore, the curing time can be significantly reduced compared to the conventional curing time (3 to 7 days) required for drying and hardening mortar. In addition, the photocurable filler is filled into the recesses excluding the deteriorated concrete. Therefore, the construction method of the earthquake-resistant flexible joint is The law For example, compared to using a photocurable sheet together with a photocurable filler, it is possible to save on materials used in repair work and shorten the work time. [Brief description of the drawings]

[0011]

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Mode for Carrying Out the Invention

[0012] An embodiment of the present invention will be described with reference to the drawings. In the following description, first, the configuration of a seismic flexible joint disposed at the joint of a concrete structure that serves as a pipe used in a water channel will be described as a first embodiment, and then the construction method of the seismic flexible joint will be described. As shown in FIG. 1, the concrete structure 100 is configured in a pipe shape that forms a water channel by connecting cylindrical concrete members 10 and 10. In the concrete structure 100, a joint 12 is provided at the connection portion 11 of the connecting concrete members 10 and 10, and it is necessary to reinforce the portion of the joint 12 due to aging deterioration. Therefore, in the concrete structure 100, a seismic flexible joint 20 is provided at the portion of the joint 12.

[0013] As shown in FIG. 2, in the installation of the seismic flexible joint 20, for example, after checking the deteriorated concrete portions in a predetermined range on both sides of the joint 12, they are removed to form a recess 8. Then, the formed recess 8 is filled with a photocurable filler 26 and cured by light irradiation. Further, the seismic flexible joint 20 is installed by fixing it with anchor bolts 23 in a state where a part or all of the expansion and contraction member 21 abuts on the photocurable filler 26. The size of the seismic flexible joint 20 is set according to the requirement of seismic strength. The size in the width direction of the seismic flexible joint 20 is set according to the length measured at the construction site and the required seismic strength. This seismic flexible joint 20 includes an expansion and contraction member 21 that covers the position facing the joint 12 from above the concrete member 10 repaired with the photocurable filler 26, pressing plates 22 and 22 that press both end sides of the expansion and contraction member 21, a protective sheet 24 that covers the expansion and contraction member 21 and is fixed by the pressing plates 22 and 22, and anchor bolts 23 and nuts 29 that fix the pressing plates 22 and 22.

[0014] The telescopic member 21 is formed, for example, of a telescopic member such as ethylene propylene rubber in a sheet shape. The telescopic member 21 has a folded portion 21a folded so that the central side overlaps, a flat portion 21b continuously pressed by pressing plates 22, 22 from the folded portion 21a, and upright portions 21c rising vertically from both ends of the flat portion 21b in a direction perpendicular to the flat portion 21b. Note that the folding shape of the folded portion 21a is not particularly limited. Further, the flat portion 21b has a width that allows the pressing plate 22 to contact. The flat portion 21b is in a state where the facing portions are in contact with the photocurable filler 26 and the concrete member 10. Further, the upright portion 21c raises the ends of the flat portion 21b vertically so that the side surfaces of the pressing plates 22 contact, ensuring the pressing by the pressing plates 22, 22. Further, as an example, through holes through which anchor bolts 23 pass are formed at predetermined intervals in the longitudinal direction in the telescopic member 21.

[0015] The pressing plate 22 contacts the flat portion 21b of the telescopic member 21 and is pressed by the anchor bolt 23 and the nut 29 to prevent water from entering between the pressing plate 22 and the telescopic member 21. The pressing plate 22 has a square cross-sectional shape and has holes through which the anchor bolts 23 are inserted at predetermined intervals along the longitudinal direction. The pressing plate 22 is formed of a metal such as SUS304 or SUS316, for example. Note that the pressing plate 22 is formed to have a length of 50 cm to 150 cm as an example and is used in units of a predetermined length, continuously or cut as required.

[0016] The protective sheet 24 covers the telescopic member 21 and protects the telescopic member 21. The protective sheet 24 has a thickness of 1.0 mm to 2.0 mm (for example, 1.5 mm) and is formed of ethylene propylene rubber, for example. The protective sheet 24 has holes through which the anchor bolts 23 are inserted at predetermined intervals along the longitudinal direction. The protective sheet 24 is fixed by the anchor bolts 23 so as to cover the folded portion 21a and the flat portion 21b of the telescopic member 21. Note that the protective sheet 24 may not be installed depending on the environment in which the concrete member 10 is used.

[0017] Next, a construction method of the seismic flexible joint 20 will be described with reference to FIGS. 3 to 14. The construction method S100 of the seismic flexible joint shall include a deteriorated part confirmation step S3, a filler filling step S5, a light irradiation step S6, and an expansion member fixing step SA. As an example, in the construction method S100 of the seismic flexible joint, a preparation step S1A, a deteriorated part confirmation step S3, a primer application step S4, a filler filling step S5, a light irradiation step S6, an anchor bolt driving step S7, an expansion member arrangement step S8, a protective sheet arrangement step S9, and a nut tightening step S10 are performed. The expansion member fixing step SA is a step of fixing an expansion member that covers a joint via an anchor bolt. As an example, an anchor bolt driving step S7, an expansion member arrangement step S8, a protective sheet arrangement step S9, and a nut tightening step S10 are performed.

[0018] The preparation step S1A is a step of preparing for construction. The preparation step S1A performs, as an example, a site measurement area setting step S1 for performing on-site measurement and a seismic flexible joint manufacturing step S2 based on the measurement. As shown in FIG. 4, in the site measurement area setting step S1, the longitudinal measurement of the joint 12 on-site is performed, and a repair area 13 is set according to the required seismic strength. When the on-site measurement is completed, based on the measured data, the seismic flexible joint manufacturing step S2 for manufacturing the seismic flexible joint 20 is performed. The seismic flexible joint 20 is manufactured in a manufacturing factory. The seismic flexible joint 20 prepared by the preparation step S1A is transported to the site for construction.

[0019] In the concrete structure as shown in FIG. 1, the joints 12 of the concrete members 10, 10 are arranged over the circumferential direction. By performing the preparation step S1A, the range of the concrete to be repaired is clarified. By showing the range of the repair area 13 to be repaired on the surface of the concrete member 10, the deteriorated part of the concrete is confirmed and removed at a position within the boundary line indicating the shown repair area 13. The repair area 13 is, for example, a range serving as a guide for installing the seismic flexible joint 20.

[0020] As shown in FIGS. 5 and 6, the deteriorated part confirmation step S3 is a step of confirming the deteriorated part by sounding the concrete area along both sides of the joint 12 between the concrete members 10. In this deteriorated part confirmation step S3, the deteriorated part on the surface of the concrete member 10 is confirmed and removed. As an example, in the deteriorated part confirmation step S3, a sounding inspection is performed to confirm the deteriorated part of the concrete member 10, and a striking instrument such as a hammer 31 or a cutting machine 36 such as a concrete hammer (see FIG. 16) is used to remove the deteriorated part of the concrete. In the concrete member 10, the deteriorated part may be partial or may be an area that is continuous to some extent. By removing the deteriorated part of the concrete member 10 on both sides of the joint 12, a recess 8 is formed in the concrete member 10. The shape, size, and depth of the recess 8 are all different. Note that the recess 8 may extend from the inside to the outside of the repair area 13. When the deteriorated part confirmation step S3 is completed, the primer application step S4 is performed.

[0021] As shown in FIG. 7, the primer application step S4 is a step of applying a primer (for example, an adhesive) 9 to the recess 8 from which the deteriorated part of the concrete member 10 has been removed. In the primer application step S4, the primer 9 is applied into the recess 8 by showering or spraying from a spray nozzle through a primer injection device 32. The applied primer 9 enables the photocurable filler 26 to be properly fixed in the recess 8. Note that the primer 9 prevents the photocurable filler 26 from seeping into the concrete member 10 and improves the adhesiveness between the photocurable filler 26 and the concrete member 10. In the primer application step S4, although the primer injection device 32 is used, the primer 9 may be applied by other means such as a brush. When the primer application step S4 is completed, next, the filler filling step S5 is performed. Note that FIGS. 7 and 8 show the state in which the primer 9 is applied with intersecting thin lines.

[0022] The filler filling step S5 is a step of filling the recess 8 from which the deteriorated concrete has been removed with the photocurable filler 26 to make it flat. As an example, in the filler filling step S5, the recess 8 coated with the primer 9 is filled with the photocurable filler 26. As shown in FIGS. 8 and 9, in the filler filling step S5, for example, a scraper which is an instrument that can be leveled such as a brush, a spatula, a trowel, or a flat plate is used. In FIG. 8, as an example, using the trowel 33, the photocurable filler 26 filled in the recess 8 is leveled and filled so as to be flush with the surface of the non-deteriorated concrete member 10. Since the filler filling step S5 fills the recess 8 from which the deteriorated portion of the concrete member 10 has been removed with the photocurable filler 26, the material can be used minimally. Therefore, the working efficiency can be improved.

[0023] The photocurable filler 26 is cured by ultraviolet rays or light containing ultraviolet rays. The photocurable filler 26 is, for example, a material mainly containing a paste-like photocurable vinyl ester resin that is cured by irradiating light of a predetermined wavelength or ultraviolet rays. The photocurable filler 26 used here is an existing product. As an example, in the next step, the photocurable filler 26 is irradiated with light for 5 minutes at a light intensity of 10 mw / cm 2 using a 250W metal halide lamp. As an example, the photocurable filler 26 can have a cured product Barcol hardness of 38 (JIS K 7060) by light irradiation. When the filler filling step S5 is completed, next, the light irradiation step S6 is performed.

[0024] The light irradiation step S6 is a step of irradiating the flattened photocurable filler 26 with light having a wavelength at which the photocurable filler 26 cures, thereby curing the photocurable filler 26. That is, the light irradiation step S6 is a step of irradiating the photocurable filler 26 with light to cure it. As shown in FIG. 10, in the light irradiation step S6, for example, light is irradiated onto the photocurable filler 26 through a light irradiation device 34 for about 5 to 10 minutes by a 250W metal halide lamp. The light irradiation device 34 uses, for example, a metal halide lamp, irradiates light in a wavelength range of 350 nm to 725 nm, and cures the photocurable filler 26 with light in the ultraviolet wavelength region. In the light irradiation step S6, for example, using a stand, the photocurable filler 26 is irradiated with light for about 5 to 10 minutes by the light irradiation device 34 that uses a metal halide lamp.

[0025] Note that it is preferable that the light irradiation device 34 uses a plurality of metal halide lamps and irradiates light from above the photocurable filler 26 filled in the plurality of recesses 8 for a predetermined time. The lamp used in this light irradiation step S6 is one that can irradiate light in the wavelength range and including the wavelength in accordance with the wavelength of the light at which the photocurable filler 26 cures. Therefore, if the photocurable filler 26 is a material that cures in the visible light region, a lamp that can irradiate the visible light region is used for the light irradiation device 34, and if it is a material that cures in the ultraviolet region, a lamp that can irradiate the ultraviolet region is used. Also, the light irradiation device 34 may use an LED light source that irradiates a predetermined wavelength region. When the light irradiation step S6 is completed, next, the anchor bolt driving step S7 is performed.

[0026] The anchor bolt driving step S7 is a step of driving the anchor bolts 23 into the position of the photocurable filler 26 or the concrete member 10 at predetermined intervals. In the anchor bolt driving step S7, as shown in FIG. 11, the anchor bolts 23 for fixing the expansion and contraction member 21 described later are driven at regular intervals into positions where they can be inserted into the through holes formed in the expansion and contraction member 21 by a tool such as a vibration drill. A plurality of anchor bolts 23 are driven and arranged in a state where a part thereof protrudes from the upper surface of the concrete member 10 or the photocurable filler 26. When the anchor bolt driving step S7 is performed, since the photocurable filler 26 is sufficiently cured, it is necessary to drill holes with a tool such as a vibration drill in the same manner as the concrete member 10. When the anchor bolt driving step S7 is completed, next, the expansion and contraction member arranging step S8 is performed.

[0027] The expansion and contraction member arranging step S8 is a step of arranging the expansion and contraction member 21 so that the through holes of the expansion and contraction member 21 are inserted into the driven anchor bolts 23. When the expansion and contraction member 21 is arranged, it comes into contact with a part or all of the photocurable filler 26. In the expansion and contraction member arranging step S8, as an example, the expansion and contraction member 21 formed of rubber or synthetic rubber such as ethylene propylene rubber is used. As shown in FIGS. 2 and 12, the expansion and contraction member 21 is arranged in a preset folded state. Here, the expansion and contraction member 21 includes flat portions 21b, 21b that contact both ends of the joint 12, a folded portion 21a that is folded so that the sheets overlap from the flat portions 21b, 21b toward the center side, and upright portions 21c, 21c that raise the end portions outside the flat portions 21b, 21b in the vertical direction.

[0028] In the flat portions 21b, 21b of the telescopic member 21, through holes through which the anchor bolts 23 are inserted at regular intervals are formed. The telescopic member 21 used here is, for example, one having a thickness in the range of 4 mm to 8 mm (for example, 6 mm). Further, the telescopic member 21 is formed to have a width that covers the joint 12 and the repair regions 13 of the concrete members 10 on both sides thereof. The flat portions 21b, 21b of the telescopic member 21 are in a state of abutting against part or all of the photocurable filler 26. Note that the portion filled with the photocurable filler 26 may be outside the flat portions 21b, 21b, but here, at least part of the photocurable filler 26 is in a state of abutting against the flat portions 21b, 21b. When the telescopic member arrangement step S8 is completed, the protective sheet arrangement step S9 is performed.

[0029] The protective sheet arrangement step S9 is a step of arranging the protective sheet 24 so as to cover the telescopic member 21. In the protective sheet arrangement step S9, as shown in FIG. 13, the protective sheet 24 in which through holes through which the anchor bolts 23 are inserted are formed is used. Further, the protective sheet 24 is made of, for example, a material such as ethylene propylene rubber. As an example, the protective sheet 24 having a thickness in the range of 1.3 mm to 1.8 mm is used, and here, the protective sheet 24 having a thickness of 1.5 mm is used. Further, the protective sheet 24 is provided with an adhesive layer on one side and is arranged by adhering to the surface side of the telescopic member 21. When the protective sheet arrangement step S9 is completed, next, the nut tightening step S10 is performed.

[0030] The nut tightening step S10 is a step of screwing the nut 29 through the pressing plate 22 to the anchor bolt 23 that is driven into the position of the photocurable filler 26, passes through the through holes of the telescopic member 21 and the protective sheet 24, and protrudes. In the nut tightening step S10, as shown in FIG. 14, for example, a metal pressing plate 22 that is continuous in the longitudinal direction along the joint 12 and has through holes at the positions of the anchor bolts 23 is arranged. Then, in the nut tightening step S10, it is attached to the anchor bolt 23 with the nut 29 through the pressing plate 22. The pressing plate 22 used in the nut tightening step S10 is, for example, a metal bar having a rectangular cross section made of metal.

[0031] The pressing plate 22, as an example, has a thickness in the range of 6 mm to 16 mm. Here, a pressing plate with a thickness of 12 mm and a plate width of 50 mm is used. Note that the length of the pressing plate 22 is not particularly limited. For example, a plurality of pressing plates with lengths of 50 cm to 150 cm are continuously arranged and used. Also, the configuration of the pressing plate 22 is not particularly limited. For example, an angle-shaped pressing plate such as the pressing plate 25K shown in FIG. 24 may be used. Further, depending on the location where the pressing plate 22 is arranged, it is appropriately cut according to the length of that location and used. The material of the pressing plate 22 is preferably made of metal. For example, it is preferably stainless steel such as SUS304 or SUS316. In the nut tightening step S10, an electric wrench 35 is used to tighten the nut 29 to the anchor bolt 23 to fix the pressing plate 22 so as to press it downward. Note that in FIG. 14, a part of the pressing plate 22 is broken to show the protective sheet 24 directly below, a part of the protective sheet 24 is broken to show the expansion and contraction member 21 directly below, and further, a part of the expansion and contraction member 21 is broken and shown.

[0032] Through the above-described respective steps, the seismic flexible joint 20 is attached to the position covering the joint 12, and by using the photocurable filler 26 filled in the recess 8, it becomes possible to perform the work with a curing time shortened by 3 to 7 days compared to the case of using conventional mortar. Also, in each step, the anchor bolt driving step S7 and the expansion and contraction member arrangement step S8 may be in reverse order. That is, a procedure in which the expansion and contraction member 21 is first arranged and the anchor bolt 23 is driven into the position of the through hole formed in advance in the arranged expansion and contraction member 21 may be used. Also, in the steps in other construction methods shown below, the anchor bolt driving step S7 and the expansion and contraction member arrangement step S8 may be in reverse order.

[0033] In addition, as shown in FIGS. 15 to 17, it may be configured as a construction method S100B of a seismic-resistant flexible joint in which a cutting process S34B is performed between the deterioration part confirmation process S3 and the primer application process S4. The cutting process S34B is a process of forming the recess 8 by cutting the surface of the deteriorated part. For example, as shown in FIG. 16, this cutting process S34B cuts the repair area 13 to form a recess as a whole. The cutting performed in the cutting process S34B is performed so as to form a cutting surface 7 that is lower than the surface of the concrete member 10 and higher than the bottom surface of the recess 8, resulting in a recessed area. In the cutting process S34B, it is sufficient that the cutting surface 7, which is the recessed area, is formed higher than the bottom surfaces of one or more recesses 8. Here, the cutting surface 7, which is the recessed area, is higher than the bottom surfaces of more than half of the plurality of recesses 8.

[0034] Of course, it is more preferable that the cutting surface 7, which is the recessed area, is higher than the bottom surfaces of all the recesses 8. In the cutting process S34B, by forming a cutting surface 7 that is lower than the surface of the concrete member 10 and higher than the bottom surface of the recess 8, it is possible to save the material of the photocurable filler 26 and firmly maintain the reinforced state as compared with the case of cutting deeper than the bottom surface of the recess 8. When the cutting surface 7 is formed, the recess for filling the photocurable filler 26 includes the cutting surface 7 and the recess 8. In the construction method S100B of the seismic-resistant flexible joint, the other processes are the same as those of the construction method S100 of the seismic-resistant flexible joint already described.

[0035] In addition, in the construction methods S100 and S100B of the seismic-resistant flexible joint, in the concrete structure 100 constituting the water channel of FIG. 1, the seismic-resistant flexible joint 20 having the configuration shown in FIG. 2 has been described as an example. However, for example, it may be a water storage tank which is a concrete structure 100A as shown in FIG. 18, or other concrete structures not shown. Further, as the seismic-resistant flexible joint to be used, the seismic-resistant flexible joint 20 shown in FIG. 2 or the seismic-resistant flexible joint 20A as shown in FIG. 19 may be used.

[0036] As shown in Fig. 19, the seismic flexible joint 20A fixes the expansion and contraction member 21 by pressing the pressing plate 22A via the pressing fitting 25. The pressing plate 22A is formed in a C shape with a rectangular cross-section on the proximal end side (the central plate 25a side), and is arranged such that the C-shaped open portion faces upward. The pressing fitting 25 includes a central plate 25a having a hole through which the anchor bolt 23 is inserted, side plates 25b, 25b that vertically rise from both ends of the central plate 25a, and claw portions 25c, 25c that horizontally extend from the respective side plates 25b, 25b. Then, by supporting the pressing fitting 25 so as to press the pressing plate 22A with both claw portions 25c, 25c, the pressing plate 22A is fixed in a state of pressing the expansion and contraction member 21.

[0037] The pressing fitting 25 fixes the expansion and contraction member 21 by inserting the anchor bolt 23 through the hole in the central plate 25a and tightening it with the nut 29, pressing it via the pressing plate 22A. Note that since the pressing fitting 25 is fixed with the anchor bolt 23 at the position of the photocurable filler 26 or the concrete member 10 outside the expansion and contraction member 21, the expansion and contraction member 21 does not have a hole through which the anchor bolt 23 is inserted. Therefore, in the seismic flexible joint 20A, it is more difficult for water to further penetrate from the expansion and contraction member 21.

[0038] Note that as shown in Fig. 20, the expansion and contraction member 21 covers the intersecting joint 12 by making one of the intersecting sides continuous and arranging the other intersecting side to abut from both sides of the continuous expansion and contraction member 21. Also, in Fig. 20, the seismic flexible joint 20A of Fig. 19 is illustrated, but it is also possible to use the seismic flexible joint 20 of Fig. 2 or a seismic flexible joint with other configurations. Further, as shown in Figs. 21(a) to 23(c), the configurations of the first to ninth modified examples of the seismic flexible joint may be used.

[0039] That is, as shown in FIGS. 21(a) to 21(c), the seismic flexible joints 20B, 20C, and 20D of the first to third modified examples each have a configuration that does not use the protective sheet 24. Further, the seismic flexible joints 20B, 20C, and 20D each use a configuration in which the expansion and contraction members 21B, 21C, and 21D are bent to have one convex portion as a folding portion at the center. The seismic flexible joints 20B, 20C, and 20D are each of a type installed for a structure determined to have small fluctuations during an earthquake. Note that the pressing plate 22 shown in FIG. 21(a) is formed wider than the pressing plates 22 shown in FIGS. 21(b) and 21(c). As an example, the width is twice as wide.

[0040] Also, as shown in FIGS. 22(a) to 22(c), the seismic flexible joints 20E, 20F, and 20G of the fourth to sixth modified examples each use a configuration in which the expansion and contraction members 21E, 21F, and 21G are bent to have two or three convex portions as folding portions at the center. The seismic flexible joints 20E, 20F, and 20G are each of a type installed for a structure diagnosed to have a certain degree of large fluctuations during an earthquake. Further, the seismic flexible joints 20E, 20F, and 20G have a configuration in which reinforcing cloths 24E, 24F, and 24G that cover the expansion and contraction members 21E, 21F, and 21G are arranged.

[0041] These reinforcing cloths 24E, 24F, and 24G are fixed by anchor bolts 23, have an overlapping portion at the center, and when a change occurs in the structure due to vibrations such as an earthquake, the overlapping portion is unfolded to reinforce each of the expansion and contraction members 21E, 21F, and 21G. Note that the timing of arranging the reinforcing cloths 24E, 24F, and 24G is the same as the timing of replacing the protective sheet 24 and is the same timing as the process of arranging the protective sheet 24 (see FIGS. 2 and 19). Further, the reinforcing cloths 24E, 24F, and 24G are formed of, for example, cloth, resin, or other materials used in this type of product. The reinforcing cloths 24E, 24F, and 24G are used for facilities with higher strength, larger deformation, and higher water pressure than the protective sheet 24.

[0042] Furthermore, as shown in FIGS. 23(a) to 23(c), the seismic flexible joints 20H, 20I, 20J of the seventh to ninth modified examples are configured to use the pressing metal fittings 25 shown in FIG. 19 which have already been described. The seismic flexible joints 20H, 20I, 20J have the telescopic members 21H, 21I, 21J with two, three, and four convex portions as folding portions in the center, respectively. The seismic flexible joints 20H, 20I, 20J are of the type installed for structures diagnosed to have a certain degree of large fluctuations during an earthquake. And, as an example, the seismic flexible joint 20H is used without using a reinforcing cloth. Also, the seismic flexible joints 20I, 20J are configured to use the reinforcing cloths 24I, 24J. The timing at which the reinforcing cloths 24I, 21J are arranged is the same as the timing of the step of arranging the protective sheet 24 (see FIGS. 2 and 19) in place of the protective sheet 24. The reinforcing cloths 24I, 24J are formed of, for example, materials used in products such as cloth, resin, and other of this kind. The seismic flexible joint 20H may be used with a reinforcing cloth, and the seismic flexible joints 20I, 21J may be used without using the reinforcing cloths 24I, 21J.

[0043] Note that the protective sheet 24 which has already been described may not be used and the seismic flexible joints 20, 20A may be used, or a reinforcing cloth may be used instead of the protective sheet 24. Also, instead of the reinforcing cloth used in the seismic flexible joint, a configuration using the protective sheet 24 may be adopted. Furthermore, the folding portion of the telescopic member may be in a state other than that specifically shown in the drawings. Also, although the telescopic members 21B to 21J are shown such that no standing portions are formed at both ends in the width direction, a configuration with standing portions may be adopted. And, in all of the described seismic flexible joints, they may be used without using a protective sheet or a reinforcing cloth. When using a reinforcing cloth instead of the protective sheet 24, the construction method S100C of the seismic flexible joint including the reinforcing cloth arrangement step S9c is performed according to the procedure as described in FIG. 25.

[0044] As shown in FIGS. 24(a) and (b), the seismic flexible joint 20K of the 10th modification example and the 11th modification example covers the expansion member 21K with a reinforcing cloth 24K, and is fixed with the anchor bolt 23 together with the reinforcing cloth 24K through pressing plates 25K arranged on both ends of the expansion member 21K. The expansion member 21K is provided with one convex portion 21Ka protruding upward continuously in the longitudinal direction along the joint 12 at the center between the anchor bolts 23, 23. The expansion member 21K is an enlarged convex state of the expansion member 21D already described. The expansion member 21K has a dimension from the top of the convex portion 21Ka as a folding portion to be substantially equal to the length of one flat portion 21Kb.

[0045] Further, the pressing plate 25K includes a flat portion 25k1 in which a through hole of the anchor bolt 23 is opened, a plate standing portion 25k2 formed at one end on the joint 12 side of the flat portion 25k1, and a standing lower portion 25k3 formed at the other end of the flat portion 25k1. The plate standing portion 25k2 is formed orthogonally from the flat portion 25k1 so as to rise higher than the bolt head of the anchor bolt 23. The standing lower portion 25k3 is formed by bending downward orthogonally from the flat portion 25k1 or joining, and is formed to have a height substantially the same as the thickness of the expansion member 21K.

[0046] Therefore, when the pressing plate 25K is fixed with the anchor bolt 23, the lower end portion of the standing lower portion 25k3 comes into contact with the upper surface of the concrete member 10. The pressing plate 25K having such a configuration makes it difficult for the expansion member 21K to be damaged when the rubber is deformed due to settlement or when water pressure is applied, because the deformed portion hits the plate standing portion 25k2 in a surface contact manner, and the expansion member 21K can be prevented from being damaged by point contact with the anchor bolt 23 or the nut 29.

[0047] The telescopic member 21K with such a configuration can be continuously used as it is for a structure in which, for example, as shown in Fig. 21(b), one of the regions that were flat surfaces on both sides of the joint becomes a vertical surface. That is, by twisting and deforming the telescopic member 21K by 90 degrees from the state of Fig. 21(a), the telescopic member 21K can be continuously arranged even when one is a vertical surface and the other is a horizontal surface, as shown in Fig. 24(b). This is because the convex portion 21Ka of the telescopic member 21K has a predetermined size, and it can follow and deform even if the angle of the installation surface changes within the range of that size and is 90 degrees or less. In Fig. 24(b), one installation surface is shown at an angle of 90 degrees with respect to the other installation surface. However, if the total change in the installation surfaces on both sides of the joint 12 where the telescopic member 21K is installed is 90 degrees or less from the horizontal plane, for example, if one installation surface is 30 degrees from the horizontal, the other installation surface is 60 degrees from the horizontal, or both installation surfaces are 45 degrees from the horizontal, etc., and the total is 90 degrees or less, the telescopic member 21K can be continuously used.

[0048] Also, in the construction method of the seismic flexible joint already described, after the deteriorated part confirmation step S3, S34B of cutting a predetermined range with a cutting machine 36 (see Fig. 16) was performed so as to form a cutting surface at a position higher than the bottom surface of the recess 8. In addition, as shown in Fig. 27, in this cutting step S34B, the concrete member 10 may be cut so as to form a cutting surface 7 that is the same as or lower than the bottom surface of the recess 8 in the repair region 13.

[0049] Alternatively, the cutting process may cut the repair area 13 without performing the deteriorated part confirmation process. That is, as shown in FIGS. 25 to 27, in the manufacturing methods S100C and S100D of the seismic flexible joint, this is the case where the cutting process is selected in the deteriorated part confirmation process or the cutting process SC. In this case, as shown in FIG. 27, the cutting surface is formed by cutting the concrete member 10 of the repair area 13 with a cutting machine 36 at a preset constant depth. Therefore, after the preparation process, a cutting process is performed to cut the repair area 13, which is a predetermined range including the deteriorated part, in the area of the concrete member 10 along both sides of the joint 12. Then, thereafter, a filler filling process of filling a photocurable filler may be performed, and further, each of the other processes may be performed. When a cutting surface is formed in the repair area 13 in the cutting process, the repair area 13 becomes a recess, and the photocurable filler 26 is filled in the recess. In addition, after forming a cutting surface in the repair area 13, a sound inspection may be performed with a hammer or the like, and if there is a portion where the concrete member is deteriorated on the cutting surface, a recess may be formed on the cutting surface.

[0050] When cutting the repair area and filling the photocurable filler by such a cutting process, compared with shortening the process and using a photocurable sheet for example, since the photocurable filler is used alone for work, material savings can be achieved. As shown in FIGS. 25 and 26, in the construction method of selecting and performing the cutting process, next, the filler filling process S5 is performed, and the work is performed in a procedure including the light irradiation process S6, the anchor bolt driving process S7, and the expansion member arrangement process S8. In the manufacturing method S100D of the seismic flexible joint, the protective sheet arrangement process using a protective sheet or the reinforcing cloth arrangement process S9d may be performed according to the state of the construction site. When performing the cutting process, for the repair area, a setting process is performed, and marks are made so that the range of the area can be known, such as making a cut on the concrete surface or writing the range of the area to be repaired with ink or the like on the concrete surface. Also, in the flowcharts of FIGS. 3, 15, 25, and 26, when the protective sheet and the reinforcing cloth are not used, the expansion member fixing step SA will perform the anchor bolt driving step S7, the expansion member arranging step S8, and the nut tightening step S10.

[0051] Also, the construction method of the seismic flexible joint has been described. For example, as shown in FIGS. 28 and 29(a) to (b), as the concrete repair method B100, the deterioration part confirmation step S3, the filler filling step S5, and the light irradiation step S6, which have already been described, may be performed. That is, as the concrete repair method B100, the deterioration part confirmation step S3, the filler filling step S5, and the light irradiation step S6 may be performed, or the deterioration part confirmation step S3, the primer application step S4, the filler filling step S5, and the light irradiation step S6 may be performed.

[0052] In FIG. 29(a), a part of the concrete member 10 on one side of the joint 12 is in a deteriorated state, indicating a case where it is only necessary to repair a part of the deteriorated concrete member 10 without arranging the expansion member 21 on the joint 12. Such a partially deteriorated concrete member 10 is confirmed by a sound inspection and the deteriorated part is removed with a hammer 31 or the like (deterioration part confirmation step S3). Then, as shown in FIG. 29(b), a primer application step S4 of applying a primer to the recess 8 is performed. Further, as shown in FIG. 29(c), a filler filling step S5 of filling the recess 8 coated with the primer 9 with a photocuring filler 26 to make it flat is performed, and as shown in FIG. 29(d), a light irradiation step S6 is performed. By performing each step in the above-described procedure in this way, it may also be a concrete repair method. Furthermore, as a concrete repair method, the deterioration part confirmation step S3, the cutting step S34B (see FIG. 15), the primer application step S4, the filler filling step S5, and the light irradiation step S6 may be performed.

[0053] 25 to 27, a cutting step is selected in step SC, followed by a primer step S4, a filler filling step S5, and a light irradiation step S6, to form a concrete repair method. The details of each step in the concrete repair method shown here are the same as those already explained in the construction method for earthquake-resistant flexible joints. Furthermore, in the concrete repair method, in order to repair deteriorated parts of the concrete member 10, the deteriorated concrete member 10 is repaired by carrying out each of the steps described above, regardless of whether or not there is a joint 12.

[0054] The above provides a detailed explanation of the construction method for earthquake-resistant flexible joints and the concrete repair method according to the embodiments of the present invention. However, the embodiments described above or shown in the figures are merely examples of specific embodiments for carrying out the present invention, and the technical scope of the present invention should not be interpreted in a limited manner based on these. [Explanation of symbols]

[0055] 7 Cutting surface (concave area) 8 Recess 9 Primer (adhesive) 10 Concrete members (existing concrete members) 11 Connection 12 Joint 13 Repair area (predetermined area) 20 Earthquake-resistant flexible joints 21, 21B~21K Elastic members 22 Presser plate 23 Anchor bolt 24 Protective Sheet 25 Clamp 26 Photocurable filler 29 Nut 30 Electric Cutter 31 Hammer 32 Primer Injector 33 Trowel (scraper) 34 Light irradiation device 35 Electric wrench 36 Cutting machine 100 Concrete Structures S1A Preparation Process S1 Site Measurement Area Setting Process S2 Earthquake-Resistant Flexible Joint Manufacturing Process Based on Measurement S3 Deterioration Part Confirmation Process S34B Cutting Process S4 Primer Coating Process S5 Filling Material Filling Process S6 Light Irradiation Process S7 Anchor Bolt Driving Process S8 Expansion Member Arrangement Process S9 Protection Sheet Arrangement Process S10 Nut Tightening Process S100, S100B, S100C, S100D Construction Method of Earthquake-Resistant Flexible Joint B100 Concrete Repair Method

Claims

1. a deterioration confirmation step of confirming deterioration by tapping areas of concrete along both sides of joints between concrete members; a filler filling step for filling a light-curing filler into the recessed portion from which the concrete of the deteriorated portion has been removed to make the surface flat; a light irradiation step of irradiating the flattened photocurable filler with light having a wavelength at which the photocurable filler is cured to cure the photocurable filler; A method for constructing an earthquake-resistant flexible joint, comprising: a step of fixing an elastic member covering the joint via an anchor bolt; The method for constructing an earthquake-resistant flexible joint, wherein the elastic member is fixed in a state in which part or all of the elastic member is in contact with the surface of the photocurable filler.

2. The construction method for an earthquake-resistant flexible joint according to claim 1 , further comprising a cutting step of cutting a surface of the deteriorated portion to form the recessed portion before the filler filling step.

3. a cutting step of cutting a surface of a region including the deteriorated portion to form a recessed region continuous with the recess, before the filling step; 2. The method for constructing an earthquake-resistant flexible joint according to claim 1, wherein the recessed area is cut lower than a surface of undeteriorated concrete and higher than a bottom surface of the recess.

4. 3. The method for constructing an earthquake-resistant flexible joint according to claim 1, wherein the photocurable filler is cured by ultraviolet light or light containing ultraviolet light.

5. 3. The construction method for an earthquake-resistant flexible joint as described in claim 1 or claim 2, wherein a primer application step is performed before the filler filling step, in which a primer is applied to the recess, and the filler filling step is performed by filling the recess to which the primer has been applied with a photocurable filler.

6. a cutting step of cutting a predetermined area including a deteriorated portion in a region of concrete along both sides of a joint between the concrete members to form a recess; a filler filling step of filling the recess with a photocurable filler to flatten the recess; a light irradiation step of irradiating the flattened photocurable filler with light having a wavelength at which the photocurable filler is cured to cure the photocurable filler; A method for constructing an earthquake-resistant flexible joint, comprising: a step of fixing an elastic member covering the joint via an anchor bolt; The method for constructing an earthquake-resistant flexible joint, wherein the elastic member is fixed in a state in which part or all of the elastic member is in contact with the surface of the photocurable filler.

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