High-strength reinforcement material with excellent productivity for hollow pillars

Abstract

To provide a mechanism that reinforces hollow columnar objects with less number of parts.SOLUTION: A reinforcement member for hollow columnar objects comprises a hollow columnar bag-like sheet, an insertion rod that inserts the aforesaid bag-like sheet into the aforesaid hollow columnar object, and a connection member that connects the aforesaid bag-like sheet and the tip of the aforesaid insertion rod in a disconnectable manner. The aforesaid bag-like sheet has a configuration in which it is capable of self-supporting in its longitudinal direction when it is filled with a specific amount of a fluid hardener.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The invention disclosed herein relates to a high-strength reinforcing material that is excellent in productivity for hollow pillar-shaped objects. [Background technology]

[0002] A method for reinforcing hollow pillar-shaped objects is disclosed in Patent Document 1. Patent Document 1 discloses that "reinforcing material 1 is pushed up from below using hollow pipe 4 to be placed inside utility pole 100, and filler material is supplied to hollow pipe 4, and through-holes 10 are used to inject the filler material into utility pole 100 from the bottom up" (see abstract).

[0003] Patent Document 2 discloses a method of reinforcing a hollow structure, in which the first stage of delivery balloons is inflated and held at the top of the hollow tubular structure, and then the reinforcing assembly is lifted with a connected pulley, and after inflating the reinforcing assembly, the second stage of delivery balloons at the top is inflated and held, and then the hardener injection hose is lifted with a lifting rope via a connected pulley, and hardener is injected from the hose, which expands and reinforces the structure.

[0004] Patent Document 3 discloses a method of reinforcing a hollow structure, in which a push-up rod is screwed into a push-up fixing device that holds a tubular reinforcing material by placing a fixed blade facing diagonally downward on the inner wall of a hollow column, and the reinforcing material is held by wrapping a belt around the push-up rod closest to the push-up rod. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2021-4546 [Patent Document 2] Japanese Patent Application Laid-Open No. 2016-37807 [Patent Document 3] Japanese Patent Publication No. 2022-81605 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the reinforcement method of Patent Document 1 uses an expansion material to hold the reinforcing sheet in place, which increases construction time and the number of parts. The reinforcement method of Patent Document 2 uses two separate balloons to lift the reinforcing sheet and the hardener injection hose, which increases the number of parts and reduces workability. The installation method of Patent Document 3 requires a push-up fixing device that holds the fixed blade at the tip of the push-up rod against the inner wall of the hollow column, which increases the number of parts.

[0007] The present invention provides a mechanism for reinforcing hollow columns with a small number of parts. [Means for solving the problem]

[0008] In order to solve the above problems, for example, the configurations described in the claims are adopted. [Effects of the Invention]

[0009] According to the present disclosure, a mechanism for reinforcing a hollow columnar object using a small number of parts is provided. Problems, configurations, and effects other than those described above will become apparent from the following description of the embodiments. [Brief explanation of the drawings]

[0010] [Figure 1] 10A and 10B are schematic diagrams illustrating an insertion step of a method for reinforcing a hollow columnar object according to one embodiment. [Figure 2] 10A and 10B are schematic diagrams illustrating a fixing step in a method for reinforcing a hollow columnar object according to one embodiment. [Figure 3] 1 is a schematic diagram illustrating a filling step of a method for reinforcing a hollow columnar object according to an embodiment; [Figure 4] 10 is a partial schematic view illustrating in detail a reinforcing member for a hollow columnar object in an insertion step. FIG. [Figure 5] 10 is a partial schematic view illustrating in detail a reinforcing member for a hollow columnar object in a fixing process. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] The following describes a method for reinforcing a hollow pillar and a reinforcing member for a hollow pillar according to the present disclosure, with appropriate reference to the drawings. In this disclosure, a hollow pillar is reinforced using a reinforcing member for a hollow pillar. Examples of hollow pillars that can be used include, but are not limited to, concrete wiring poles (a concept that includes telegraph poles, communication poles, etc.), support poles (poles for supporting lighting, cameras, nets, etc.), chimneys, large-diameter hollow pillars such as hollow bridge piers, and other hollow concrete pillars.

[0012] 1 to 3 are schematic diagrams illustrating the inserting step, fixing step, and filling step, respectively, of a method for reinforcing a hollow columnar object 1 using a reinforcing member 20 for a hollow columnar object according to one embodiment. FIG. 4 is a partial schematic diagram showing in detail the reinforcing member 20 for a hollow columnar object in the inserting step. FIG. 5 is a partial schematic diagram showing in detail the reinforcing member 20 for a hollow columnar object in the filling step. In each diagram, parts of the hollow columnar object 1 and the reinforcing member 20 for a hollow columnar object are shown in perspective to facilitate understanding of the configuration and operation of the reinforcing member 20 for a hollow columnar object.

[0013] The method for reinforcing a hollow columnar object 1 according to the present disclosure generally includes the steps of (1) preparing a reinforcing member 20 for a hollow columnar object, (2) inserting the reinforcing member 20 for a hollow columnar object into the hollow portion of the hollow columnar object 1, (3) injecting a first amount of fluid hardener, (4) withdrawing the pushing rod 4, and (5) injecting a second amount of fluid hardener.

[0014] The high-strength reinforcing material of the present invention, which is highly productive for hollow columnar objects 1, is a bag-like sheet 3 made by molding a high Young's modulus sheet into a cylindrical shape and sealing the top and bottom ends of the bag-like sheet 3, which is folded in half along the long side of the sheet. An injection pipe 6 for a flowable hardener 5 is connected to the sheet and a vinyl hose 7 is connected to the outlet of the injection pipe 6, which extends to the bottom of the bag-like sheet 3. The top of the bag-like sheet 3 is provided with a connecting member 11 for a push rod 4 that inserts the bag-like sheet 3 into the hollow columnar object 1, and the sheet is held in place by a belt winding and fixing mechanism 12 (an example of a fixing mechanism) via the push rod 4. After that, the bag-like sheet 3 is pressed against the inner wall of the hollow columnar object 1 by the internal pressure of the flowable hardener 5's own weight and is held at the bottom of the hollow columnar object 1. The push rod 4 is then separated from the connecting member 11 and pulled out of the hollow columnar object 1, leaving no residue other than the reinforcing material inside the hollow columnar object 1.

[0015] The bag-shaped sheet 3 is made of a sheet knitted by weaving a woven fabric in which a predetermined number of untwisted or twisted fiber bundles, each of which is a bundle of high Young's modulus filament yarns, are connected with weft yarns, and the fibers are impregnated with a certain amount of thermosetting or thermoplastic resin. The bag-shaped sheet 3 is made by molding a woven fabric sheet into a cylindrical shape and sealing the top and bottom ends, and is stored by folding in half along the long side of the sheet 3.

[0016] A connecting member 11 of a push rod 4 is provided at the top of the bag-shaped sheet 3 for inserting the sheet into a predetermined position in the hollow columnar object 1. Inside the tip cap of the connecting member 11, the bag-shaped sheet 3 is attached by being engaged or fitted to the connecting member 11 with a plastic belt, a metal belt, an adhesive, or both.

[0017] A T-shaped injection pipe 6 for filling the fluid hardening material 5 is disposed in communication with the bag-shaped sheet 3 and is engaged with the bag-shaped sheet 3 by a plastic belt, a metal belt, an adhesive, or both. A vinyl hose 7 is engaged with one of the T-shaped outlets of the injection pipe 6 by a plastic belt, a metal belt, an adhesive, or both, and is disposed so as to extend to the bottom of the bag-shaped sheet 3.

[0018] The push rod 4 can be extended along the long side of the surface of the bag-shaped sheet 3, engaging with the divided parts of the push rod 4 according to the insertion length, and its tip is formed with a male or female screw, and the connecting member 11 is formed with a female or male screw, and the screws are used alternately when connecting. When inserting, the push rod 4 is engaged and used in a forward rotation. When the bag-shaped sheet 3 reaches the predetermined position, the extension of the push rod 4 stops and the bag-shaped sheet 3 stops.

[0019] When the stretching of the bag-shaped sheet 3 stops at a predetermined position, the pushing rod 4 is inserted into a sheath tube 15 (an example of a support part) of a diameter slightly larger than that of the pushing rod 4, which is connected to the tip of the fiber belt 13 (an example of a connecting belt) wound around a belt winding and fixing mechanism 12 (an example of a fixing mechanism), and the fiber belt 13 is wound up by the belt winding and fixing mechanism 12, so that the bag-shaped sheet 3 is suspended and held within the hollow columnar object 1 via the pushing rod 4.

[0020] When the fluid hardener 5 is filled from the injection pipe 6, the fluid hardener 5 is filled without separating from the bottom of the bag-shaped sheet 3 through the discharge port of the T-shaped vinyl hose 7, and the injection is stopped when the fluid hardener 5 reaches the height of the injection pipe 6. The bag-shaped sheet 3 is pressed against the inner wall of the hollow columnar object 1 by the internal pressure of the fluid hardener 5's own weight and is held at the bottom of the hollow columnar object 1.

[0021] The push rod 4 is rotated in the reverse direction, and the push rod 4 is separated from the connecting member 11, and the suspension is released. After the push rod 4 is pulled out of the hollow columnar object 1, the fluid hardening material 5 fills the bag-like sheet 3, and the filling is stopped to complete the reinforcement.

[0022] The pushing rod 4 is made of a flexible resin rod or metal rod with a diameter narrower than the width of the drilled hole 2 in the hollow columnar object 1, and is shaped to have no cross-sectional defects and is woven with enough strength to prevent buckling with the specified mass of the fluid hardening material 5.

[0023] The reinforcement method disclosed in Patent Document 1 involves inserting a reinforcing sheet formed into a cylindrical shape from the ground level of a hollow columnar object using a flexible hollow pipe disposed in the hollow portion of the sheet, pushing the sheet up to a predetermined position, using an expansion material located inside the top of the reinforcing sheet to press and fix the reinforcing sheet and hollow pipe against the inner wall of the hollow columnar object, and then injecting mortar into the reinforcing sheet through the through-hole of the hollow pipe to fill it. Patent Document 2 also discloses a method of reinforcing a hollow structure in which a first stage of delivery balloons is inflated and held at the top of the hollow cylindrical structure, followed by lifting a reinforcing assembly with a connected pulley and expanding the reinforcing assembly, followed by inflating and holding the second stage of delivery balloons at the top, followed by lifting a hardener injection hose with a lifting rope via the connected pulley, and injecting hardener from the hose to expand and reinforce the structure. Patent Document 3 discloses a method of reinforcing a hollow structure, in which a push-up rod is screwed into a push-up fixing device that holds a tubular reinforcing material by placing a fixed blade facing diagonally downward on the inner wall of a hollow column, and the reinforcing material is held by wrapping a belt around the push-up rod closest to the push-up rod.

[0024] However, the reinforcement method of Patent Document 1 uses expansive material to hold the reinforcing sheet in place, increasing construction time and the number of parts. Furthermore, the hollow pipe and expansive material remain in the mortar as foreign bodies, reducing the strength of the mortar. The reinforcement method of Patent Document 2 uses two separate balloons, one to lift the reinforcing sheet and the other to lift the hardener injection hose, increasing the number of parts and reducing workability. The installation method of Patent Document 3 requires a push-up fixing device to hold the fixed blade at the tip of the push-up rod against the inner wall of the hollow column, increasing the number of parts. Furthermore, the fixed blade's blades are too long to hold large-diameter pipes, and they buckle under the lifting load of the filler, so it is limited to small-diameter pipes.

[0025] In contrast, the high-strength reinforcing material for hollow columnar objects 1 according to the present invention, which is highly productive, is a bag-shaped sheet 3 with a high Young's modulus, and the vinyl hose 7 connected to the injection tube 6 prevents separation of the fluid hardener 5 and stabilizes the strength, the connection work of the pushing rod 4 can be done outside the bag-shaped sheet 3, the pushing rod 4 has no cross-sectional defects and is strong, making insertion work easy, and the bag-shaped sheet 3 can be easily fixed via the pushing rod 4 with a belt winding and fixing mechanism 12, thereby shortening the work time, thereby providing a high-strength reinforcing material for hollow columnar objects 1 which is highly productive and strong, and which leaves no residue other than the reinforcing material inside the hollow columnar object 1.

[0026] 1 to 3 show a reinforcing procedure for hollow columnar objects 1 according to an embodiment of the present invention, which is a high-strength reinforcing material with excellent productivity, with an inserting step, a fixing step, and a filling step.

[0027] In an embodiment of the high-strength reinforcement material with excellent productivity for the hollow columnar object 1 of the present invention, the insertion process shown in Figure 1 shows a form in which a pushing rod 4 is aligned along the long side direction of the surface of the bag-shaped sheet 3 and inserted through the drilled hole 2 in the hollow columnar object 1.

[0028] In the embodiment of the high-strength reinforcing material with excellent productivity for hollow columnar objects 1 according to the present invention, in the fixing process shown in Fig. 2, when the stretching of the bag-shaped sheet 3 stops at a predetermined position, the fiber belt 13 is wound up so that the bag-shaped sheet 3 is suspended and held within the hollow columnar object 1 via the pushing rod 4, and the fluid hardener 5 is filled from the injection tube 6, and the injection is stopped when the fluid hardener 5 reaches the height of the injection tube 6. The internal pressure of the fluid hardener 5 due to its own weight presses the bag-shaped sheet 3 against the inner wall of the hollow columnar object 1 and holds it at the bottom.

[0029] In the embodiment of the high-strength reinforcing material having excellent productivity of the hollow columnar object 1 according to the present invention, the filling process shown in FIG. 3 shows the state in which the pushing rod 4 is pulled out of the hollow columnar object 1 and the bag-shaped sheet 3 is filled with the fluid hardener 5.

[0030] In the embodiment of the high-strength reinforcement material with excellent productivity for hollow columnar objects 1 according to the present invention, the details of the insertion process and fixing process shown in Figure 4 show that the threaded portion of the connecting member 11 and the threaded portion of the pusher rod 4 are rotated forward to engage and connect, and then the pusher rod 4 is inserted along the long side direction of the surface of the bag-like sheet 3 through the drilled hole 2 in the hollow columnar object 1. Depending on the extension length, the tip of an additional pusher rod 4 is rotated forward to engage and connect with the threaded portion at the bottom end of the pusher rod, and then the extension is shown.

[0031] Regarding an embodiment of a high-strength reinforcing material with excellent productivity for hollow columnar objects 1 according to the present invention, the details of the insertion process and fixing process shown in Figure 4 show that when the stretching of the bag-shaped sheet 3 stops at a predetermined position, the pushing rod 4 is inserted into a sheath tube 15 with a diameter slightly larger than that of the pushing rod 4 connected to the tip of the fiber belt 13 wound around the belt winding and fixing mechanism 12, and the fiber belt 13 is wound up by the belt winding and fixing mechanism 12, thereby suspending and holding the bag-shaped sheet 3 within the hollow columnar object 1 via the pushing rod 4.

[0032] In an embodiment of the present invention, a high-strength reinforcement material for hollow pillar-shaped structures 1, which is highly manufacturable, is shown in detail in the filling process of FIG. 5. When fluid hardener 5 is filled through injection pipe 6, it is discharged from the outlet of T-shaped vinyl hose 7 to the bottom of bag-shaped sheet 3 without separating. When fluid hardener 5 reaches the height of injection pipe 6, injection is stopped. The internal pressure of the fluid hardener 5's own weight presses the bag-shaped sheet 3 against the inner wall of hollow pillar-shaped structure 1, holding the lower part of hollow pillar-shaped structure 1 in place. By rotating pusher rod 4 in the reverse direction, pusher rod 4 separates from connecting member 11, releasing the suspended support. After pusher rod 4 is pulled out of hollow pillar-shaped structure 1, the fluid hardener 5 fills bag-shaped sheet 3, stopping the filling and completing the reinforcement.

[0033] The reinforcing member 20 for a hollow columnar object will be explained again with reference to FIGS. As shown in FIG. 1, the reinforcing member 20 for a hollow columnar object according to the present disclosure generally comprises a bag-shaped sheet 3, a pushing rod 4, a connecting member 11, an injection tube 6 (an example of an injection tube member), and a fixing mechanism.

[0034] The bag-shaped sheet 3 is an element that reinforces the hollow columnar object 1, which is the object to be reinforced. The bag-shaped sheet 3 provides, for example, resistance to bending moments and resistance to horizontal loads to the hollow columnar object 1. The bag-shaped sheet 3 generally has a hollow columnar bag shape corresponding to the hollow shape of the hollow columnar object 1. The hollow columnar object 1 is reinforced by integrally fixing the bag-shaped sheet 3 to the inner surface of the hollow columnar object 1. A fluid hardening material 5 is used as a fixing material for integrally fixing the bag-shaped sheet 3 to the inner surface of the hollow columnar object 1.

[0035] The bag-shaped sheet 3 is made of a sheet with a high Young's modulus. For example, the bag-shaped sheet 3 is formed into a cylindrical shape and the top and bottom ends are sealed. The top and / or bottom ends of the bag-shaped sheet 3 may be sealed with an adhesive, by sewing with a sewing machine, or the like.

[0036] In this specification, "high Young's modulus" means that the elastic modulus (tensile elastic modulus) of the bag-shaped sheet 3 at least in the longitudinal direction is higher than the elastic modulus (tensile elastic modulus) of the hollow columnar object 1 to be repaired in the axial direction. The elastic modulus of the bag-shaped sheet 3 is preferably higher than the elastic modulus required for the hollow columnar object 1, and for example, is preferably equal to or higher than the elastic modulus of the hollow columnar object 1 at the time of manufacture. For reference, the tensile elastic modulus of a concrete structure is generally estimated to be equal to or slightly smaller than the compressive elastic modulus. The compressive elastic modulus (Young's modulus) of reinforced concrete is variously defined depending on the design standard strength, etc., but it is 3.80 x 10 at a design standard strength of 80. 4 N / mm 2 Above, for PHC piles, 4.00 x 10 4 N / mm 2 That's all.

[0037] The bag-shaped sheet 3 can be made of, for example, high-elasticity fibers. The bag-shaped sheet 3 is preferably a woven fabric made of high-elasticity fibers. A woven fabric made of high-elasticity fibers is, for example, a woven fabric in which a predetermined number of high-elasticity fibers (for example, filament yarns) are bundled together to form untwisted or twisted fiber bundles (warp yarns) connected by weft yarns. Although not essential, a woven fabric made of high-elasticity fibers may be impregnated with and cured with a resin material (for example, a thermosetting resin or a thermoplastic resin). In this specification, a high-elasticity fiber refers to a fiber having a tensile strength of 20 g / d (17.7 cN / dtex) or more and a tensile modulus of elasticity of 400 g / d (50 GPa, approximately 353 cN / dtex) or more. Although not limited thereto, the high modulus fiber preferably has a tensile modulus of 500 cN / dtex or more, 700 cN / dtex or more, 700 cN / dtex or more, 1000 cN / dtex or more, or 1200 cN / dtex or more. Furthermore, the number of fiber bundles constituting the woven fabric may be, for example, 10,000 or more. Examples of such high modulus fibers include aramid fibers, carbon fibers, high-density polyethylene fibers, and polybenzazole fibers.

[0038] Prior to construction, the bag-shaped sheet 3 is preferably prepared by flattening and folding the generally cylindrical sheet into a flat, generally two-dimensional strip, and then folding this into a thinner strip with the fold (folded portion 10) along the longitudinal direction (e.g., the axis of the cylinder). The bag-shaped sheet 3 may be folded in half lengthwise (with the fold along the longitudinal direction), or may be folded multiple times like a folding screen. The bag-shaped sheet 3 may be folded into a thin strip, with the upper and lower ends sealed, for example. By folding the sheet in this manner, the hollow columnar object reinforcing member 20 can be easily inserted into the hollow of the hollow columnar object 1 during the insertion step during construction. Furthermore, because the bag-like sheet 3 is folded in a form that allows easy unfolding, when a first amount of fluid hardener 5 is supplied into the hollow columnar object 1, the lower end side of the bag-like sheet 3 is pressed against the inner wall of the hollow columnar object 1 by the fluid hardener 5 and expands, and the bag-like sheet 3 can gradually expand (for example, into a roughly conical or fan-like shape) from the upper end to the bottom above the fluid hardener 5, thereby supporting the self-supporting of the bag-like sheet 3. Furthermore, the bag-like sheet 3 folded into a thin strip may be rolled up or folded lengthwise for convenient storage, keeping, transportation, etc.

[0039] The injection pipe 6 is an element that provides a flow path for injecting the fluid hardening material 5 into the bag-shaped sheet 3. The injection pipe 6 is an additional element, and is attached to the bag-shaped sheet 3 at a position corresponding to the drilled hole 2 when, for example, a hole 2 for reinforcement work is drilled in the hollow columnar object 1 to be reinforced and the bag-shaped sheet 3 is inserted into the hollow of the hollow columnar object 1. The injection pipe 6 is attached to the bag-shaped sheet 3 at any timing. For example, the injection pipe 6 is attached to the bag-shaped sheet 3 during construction, before construction (including during manufacturing of the reinforcing member 20 for hollow columnar objects), or during the injection process.

[0040] The injection pipe 6 has a T-shaped flow path consisting of a first flow path that connects the inside and outside of the bag-shaped sheet 3, a second flow path that communicates with the first flow path and extends along the longitudinal direction of the bag-shaped sheet 3 toward the upper end, and a third flow path that extends toward the lower end. The injection pipe 6 in this embodiment is a T-pipe. A vinyl hose 7 is connected to the third flow path of the injection pipe 6, which is a T-pipe. The vinyl hose 7 has a size that allows it to be arranged up to the hollow bottom of the hollow columnar object 1 (which may be the bottom of the bag-shaped sheet 3) when the bag-shaped sheet 3 is inserted into the hollow of the hollow columnar object 1 to be reinforced.

[0041] The push rod 4 is an element for inserting the bag-shaped sheet 3 into the hollow columnar object 1. The push rod 4 is a rod-shaped body made of a flexible material (e.g., a resin material or a metal material). The push rod 4 is not limited to this, but may have a diameter of, for example, approximately 30 mm to 40 mm. During construction, the upper end of the bag-shaped sheet 3 is connected to the tip of the push rod 4 using a connecting member 11. The push rod 4 of this embodiment is configured to be separable into multiple parts in the longitudinal direction. In the example shown in Figure 2, the push rod 4 is composed of three members in the longitudinal direction. Each member is configured to be detachable, for example, by a screw structure. The push rod 4 is long enough so that when the tip reaches the upper end of the hollow inside the hollow columnar object 1, the lower end remains outside the drilled hole 2.

[0042] The connecting member 11 is an element that connects the bag-shaped sheet 3 and the tip of the push rod 4. The connecting member 11 has a cap shape, as shown in FIG. 4, for example, and secures the upper end of the bag-shaped sheet 3. The connecting member 11 also detachably connects, for example, the tip of the push rod 4. This allows the push rod 4 to be detached from the bag-shaped sheet 3 after the bag-shaped sheet 3 has become self-standing inside the hollow columnar object 1, as will be described later. The connecting structure between the push rod 4 and the connecting member 11 may be, for example, a screw structure. Here, the screw structure between the push rod 4 and the connecting member 11 may be configured to allow detachment with less force (e.g., a smaller tightening torque and / or nominal diameter) than the screw structure provided between each portion of the separable push rod 4, or may be a reverse screw structure with a reverse threading direction.

[0043] The fixing mechanism 12 is an element that fixes the pushing rod 4 (and thus the reinforcing member 20 for a hollow columnar object) at a predetermined position in the vertical direction relative to the hollow columnar object 1. The fixing mechanism 12 should have sufficient load-bearing capacity and strength to hold the pushing rod 4 at a predetermined height while hanging the bag-like sheet 3 containing the first amount of fluid hardener 5 described below. The fixing mechanism 12 in this embodiment is configured, for example, by a belt winding and fixing mechanism that includes a support part, a fixing member, and a connecting belt.

[0044] The support part supports and fixes the lower end of the pusher rod 4. There are no particular limitations on the support part as long as it has the strength and configuration to stably support the lower end of the pusher rod 4, and it can be made of, for example, a cylindrical metal member with a bottom and a diameter slightly larger than that of the pusher rod 4. The support part in this embodiment is, for example, a metal sheath tube 15 in the shape of a sword sheath and with a diameter slightly larger than that of the pusher rod 4.

[0045] The fixing member is an element attached to a predetermined position on the hollow columnar object 1 in order to position the fixing mechanism 12 relative to the hollow columnar object 1. The fixing member is not limited to this, but for example, a fixing member such as a fastening band or a binding band that can be wrapped around and fastened to the hollow columnar object 1 can be used. The fixing member in this embodiment is, for example, a metal belt 14 made of a metal belt.

[0046] The connecting belt is an element that connects the support portion and the fixing member. Preferably, the connecting belt can continuously adjust the distance between the support portion and the fixing member. The connecting belt can include, for example, a long distance adjustment belt fixed to the support portion, a buckle that winds and secures the distance adjustment belt, and a buckle fixing portion that secures the buckle to the fixing member. The buckle may be configured as a cam type, a ratchet type, or an over-center type. The connecting belt of this embodiment is, for example, a fiber belt 13 with a ratchet type buckle. The fiber belt 13 is not limited to this, but a lashing belt (e.g., with a working load of approximately 750 kg and a breaking load of approximately 1500 kg) can be preferably used. By connecting the support portion and the fixing member with such a fiber belt 13, the distance between the support portion and the fixing member, and therefore the height position of the hollow columnar object reinforcing member 20, can be easily adjusted, for example, in increments of several centimeters.

[0047] Next, each step of the method for reinforcing a hollow columnar object 1 using a reinforcing member for a hollow columnar object 20 will be described. Note that, prior to the (2) inserting step, a hole for work (boring hole 2) is previously formed in the hollow columnar object 1. The boring hole 2 may be located, for example, at a position that allows for good workability, for example, at a position about 50 cm to 1 m above the ground.

[0048] (1) In the step of preparing a reinforcing member 20 for a hollow columnar object, the reinforcing member 20 for a hollow columnar object described above is assembled (see Figures 1 and 4). That is, the tip cap of the connecting member 11 is screwed onto the tip of the pushing rod 4. Also, the upper end of the bag-like sheet 3 is fixed to the tip cap of the connecting member 11. If the pushing rod 4 is a split type, only the split part closest to the tip needs to be attached to the connecting member 11. Also, if necessary, an injection pipe 6 connected to a vinyl hose 7 may be attached to a position corresponding to the drilled hole 2 in the bag-like sheet 3.

[0049] (2) In the process of inserting the reinforcing member 20 for a hollow column into the hollow column 1, the assembled reinforcing member 20 for a hollow column is inserted tip-first, i.e., from the tip cap of the connecting member 11, toward the top of the hollow column 1 through the drilled hole 2 (see Figure 1). At this time, by adding the next segment of the pushing rod 4 before the entire length of the segment is inserted, a pushing rod 4 of a predetermined length can be constructed inside the hollow column 1 with good workability. As the pushing rod 4 is inserted, the upper end of the bag-like sheet 3 is lifted above the hollow column 1. The lower end of the bag-like sheet 3 may be inserted into the hollow column 1 at an appropriate time. The insertion process is completed when the tip cap of the connecting member 11 reaches a predetermined position in the hollow column 1 (for example, a predetermined position based on a scaffolding nail).

[0050] When the pushing rod 4 is inserted to the predetermined position, it is preferable to fix the height of the pushing rod 4 (and thus the hollow columnar reinforcing member 20) relative to the hollow columnar object 1 using the fixing mechanism 12. For example, as shown in FIG. 4 , the sheath tube 15 of the fixing mechanism 12 is connected to the metal belt 14 by the fiber belt 13, and the metal belt 14 is attached to the hollow columnar object 1 at a predetermined position higher than the drilled hole 2. Then, by inserting the lower end of the pushing rod 4 into the sheath tube 15, the sheath tube 15 supports the pushing rod 4 from below, thereby maintaining the pushing rod 4 at a predetermined height. Here, for example, the distance between the sheath tube 15 and the metal belt 14 can be appropriately set by adjusting the length of the fiber belt 13 so that the bag-shaped sheet 3 is positioned at a predetermined position after the flowable hardening material 5 described below is injected into the bag-shaped sheet 3.

[0051] (3) Next, in the step of injecting a first amount of fluid hardener, the first amount of fluid hardener 5 is injected into the bag-shaped sheet 3 (first injection step). Here, by injecting the fluid hardener 5 into the lower end side of the bag-shaped sheet 3, the lower end side of the folded bag-shaped sheet 3 is pressed against the inner wall of the hollow columnar object 1, causing it to unfold. Because the fluid hardener 5 has high flow properties, it quickly spreads horizontally inside the bag-shaped sheet 3 toward the inner wall of the hollow columnar object 1 and presses against the inner wall. According to the inventors' studies, although it depends on the diameter of the hollow portion of the hollow columnar object 1, for example, in the case of a telegraph pole, when the fluid hardener 5 is supplied to a height of approximately 50 cm from the lower end of the bag-shaped sheet 3, the force of the fluid hardener 5 pressing horizontally against the inner wall of the hollow columnar object 1 prevents the bag-shaped sheet 3 from moving further downward inside the hollow columnar object 1, and the vertical position is fixed.

[0052] Therefore, the injection amount of the flowable hardener 5 in the first injection step, i.e., the first amount, can be, for example, an amount sufficient to allow the bag-shaped sheet 3 to maintain its vertical position through the action of the flowable hardener 5 supplied to the bag-shaped sheet 3, or an amount greater than this. The supply height of the flowable hardener 5 when the vertical position of the bag-shaped sheet 3 is fixed is usually sufficiently lower than the lower end of the drilled hole 2. For example, the supply height of the first amount of flowable hardener 5 can be a distance that is just barely visible to the human eye when looking downward from the drilled hole 2. Therefore, the upper limit of the first amount can be an amount such that the flowable hardener 5 supplied to the bag-shaped sheet 3 does not exceed the lower end of the drilled hole 2.

[0053] By supplying the first amount of fluid hardener 5 in this manner, the load of the bag-shaped sheet 3 and the fluid hardener 5 is applied to the tip of the pusher rod 4, causing the pusher rod 4 to bend. The lower end of the folded bag-shaped sheet 3 unfolds toward the inner wall, taking on a roughly conical or fan-like shape. This allows the bag-shaped sheet 3 to stand on its own when the tension caused by the hanging pusher rod 4 is released in the next process.

[0054] The fluid hardening material 5 is supplied to the lower end of the bag-shaped sheet 3, for example, via an injection pipe 6 and a vinyl hose 7. Mortar or concrete, for example, can be used as the fluid hardening material 5. The vinyl hose 7 provides a flow path to the hollow bottom of the hollow columnar object 1 below the drilled hole 2. This allows the fluid hardening material 5 to be stably supplied to a level below the drilled hole 2. In particular, when the fluid hardening material 5 is mortar or concrete, it can be supplied to the bag-shaped sheet 3 while preventing separation of the aggregate due to falling.

[0055] (4) In the process of recovering the pusher rod 4, the pusher rod 4 is detached from the connecting member 11 and recovered. For example, first, the fiber belt 13 is loosened to move the pusher rod 4 downward, and the pusher rod 4 is pulled out from the drilled hole 2 of the hollow columnar object 1. Because the bag-like sheet 3 and the fluid hardener 5 are held at a predetermined height by the first amount of fluid hardener 5, the deflection of the pusher rod 4 is eliminated. Then, for example, the lower end of the pusher rod 4 is rotated to detach the pusher rod 4 from the connecting member 11. Then, the pusher rod 4 can be recovered by pulling it out of the drilled hole 2. The pusher rod 4 can be recovered in appropriate pieces.

[0056] (5) In the step of injecting a second amount of fluid hardener 5, the fluid hardener 5 is injected into the bag-shaped sheet 3 following the first injection step (second injection step). The fluid hardener 5 can be supplied via the injection pipe 6 and vinyl hose 7 as needed. The fluid hardener 5 can be supplied to the bag-shaped sheet 3 above the drilled hole 2 without separating the aggregate. The second amount can be determined, for example, based on the amount of filling required to reinforce the hollow columnar structure 1 (e.g., the amount required to reach a predetermined height from the ground). The weight of the fluid hardener 5 presses the bag-shaped sheet 3 against the inner wall of the hollow columnar structure 1, and the fluid hardener 5 hardens in this state. This allows the interior of the hollow columnar structure 1 to be reinforced with a hardened material (e.g., fiber-reinforced concrete / mortar) reinforced by the bag-shaped sheet 3. At least one of the injection pipe 6 and the vinyl hose 7 may be withdrawn before the fluid hardener 5 hardens.

[0057] According to the above configuration, the bag-shaped sheet 3 is initially supported by the push rod 4 in a suspended state, but can be made to stand on its own inside the hollow columnar object 1 by supplying a first amount of fluid hardening material 5. This eliminates the need to separately prepare a member (e.g., a balloon) to support the bag-shaped sheet 3, and allows the hollow columnar object 1 to be reinforced with a small number of parts. Furthermore, for example, the hollow columnar object 1 can be reinforced without leaving a member (e.g., a balloon or push rod 4) for supporting the bag-shaped sheet 3 in the hollow columnar object 1.

[0058] In the above configuration, the pusher rod 4 is positioned outside the bag-shaped sheet 3. Therefore, there is no need to insert the pusher rod 4 from the lower end into the bag-shaped sheet 3 during construction. Furthermore, there is no need to insert the bag-shaped sheet 3 when adding a segment to the pusher rod 4. This allows for efficient repair of the hollow columnar object 1. Furthermore, the pusher rod 4 does not remain inside the fluid hardening material 5 (and thus the hardened product) after construction, which prevents a decrease in the strength (e.g., compressive strength and tensile strength) of the hardened product due to the presence of the pusher rod 4 and its deterioration and volumetric deformation. Furthermore, since the pusher rod 4 is retrieved from the inside of the hollow columnar object 1, it can be reused as long as there are no problems with strength, etc. This is also advantageous in terms of cost.

[0059] In the method for reinforcing a hollow columnar object 1 of the present disclosure, the pushing rod 4 and, if necessary, at least one of the injection tube 6 and the vinyl hose 7 can be recovered and reused. Therefore, the present disclosure can provide a reinforcing kit for a hollow columnar object, which includes, for example, a bag-shaped sheet 3 and a connecting member 11 as consumables of the reinforcing member 20 for a hollow columnar object.

[0060] The present disclosure is not limited to the above-described embodiments and includes various modifications. For example, the above-described embodiments have been described in detail to clearly explain the present disclosure, and are not necessarily limited to those including all of the described configurations. Furthermore, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, or to add the configuration of another embodiment to the configuration of one embodiment. Furthermore, it is possible to add, delete, or replace part of the configuration of each embodiment with other configurations.

[0061] The present disclosure discloses any one or a combination of two or more of the following configurations 1 to 9. [Configuration 1] The high-strength reinforcing material of the present invention, which is excellent in productivity for hollow columnar objects 1, is a bag-shaped sheet 3 made by forming a high Young's modulus sheet into a cylindrical shape and sealing the top and bottom ends of the bag-shaped sheet 3, which is folded in half along the long side direction of the sheet, and an injection pipe 6 for a fluid hardener 5 is connected to the sheet and a vinyl hose 7 is connected to the outlet and extends to the bottom of the bag-shaped sheet 3. The top of the bag-shaped sheet 3 is provided with a connecting member 11 for a push rod 4 that inserts the bag-shaped sheet 3 into the hollow columnar object 1, and the sheet 3 can be easily held and fixed via the push rod 4 with a belt winding and fixing mechanism 12. The high-strength reinforcing material of the present invention, which is excellent in productivity for hollow columnar objects 1, is characterized in that the push rod 4 can be separated from the connecting member 11 and pulled out of the hollow columnar object 1, and no residue other than the reinforcing material remains in the hollow columnar object 1. [Configuration 2] The bag-shaped sheet 3 is a sheet 3 knitted by impregnating a certain amount of thermosetting resin or thermoplastic resin into the fibers of a woven fabric in which a predetermined number of untwisted or twisted fiber bundles each having a high Young's modulus are bundled together with a weft, and is a high-strength reinforcing material excellent in productivity for the hollow columnar object 1 described in the above configuration 1. [Configuration 3] The bag-shaped sheet 3 is folded in half along the long side direction of the sheet 3 and has a folding portion 10 for storing the folded sheet 3. [Configuration 4] A high-strength reinforcing material with excellent productivity for hollow columnar objects (1) according to any one of the above configurations (1) to (3), wherein a connecting member (11) for a push rod (4) for inserting the hollow columnar object (1) into a predetermined position is disposed on the surface of the top of the bag-like sheet (3). [Configuration 5] The push rod 4 can be extended by engaging the divided portion of the push rod 4 along the long side direction of the surface of the bag-shaped sheet 3 according to the length of insertion, and a male or female screw is formed at the tip of the push rod 4, and a female or male screw is formed on the connecting member 11, and the screws are used alternately when connecting. When inserting, the push rod 4 is used by engaging with it in a forward rotation, and at a predetermined position, the push rod 4 is rotated in a reverse direction, so that the push rod 4 is separated from the connecting member 11 and pulled out of the hollow columnar object 1. A high-strength reinforcing material with excellent productivity for the hollow columnar object 1 according to any one of the above configurations 1 to 4. [Configuration 6] A high-strength reinforcing material having excellent productivity for a hollow columnar object 1 according to any one of the above configurations 1 to 5, wherein a T-shaped injection pipe 6 for filling the bag-shaped sheet 3 with a fluid hardening material 5 is disposed so as to pass through the bag-shaped sheet 3 and is engaged with the bag-shaped sheet 3 by a plastic belt, a metal belt 14, an adhesive material or both, and a vinyl hose 7 is engaged with one of the T-shaped outlets of the injection pipe 6 by a plastic belt, a metal belt 14, an adhesive material or both and is disposed so as to extend to the bottom of the bag-shaped sheet 3. [Configuration 7] A high-strength reinforcing material with excellent productivity for a hollow columnar object (1) according to any one of the above configurations (1) to (6), in which the pushing rod (4) is inserted into a sheath tube (15) having a diameter one size larger than that of the pushing rod (4) connected to the tip of the fiber belt (13) wound around the belt winding and fixing mechanism (12), and the fiber belt (13) is wound up by the belt winding and fixing mechanism (12), whereby the bag-like sheet (3) is suspended and held within the hollow columnar object (1) via the pushing rod. [Configuration 8] When the fluid hardener 5 is filled from the injection pipe 6, the fluid hardener 5 is filled in the bottom of the bag-shaped sheet 3 from the discharge port of the T-shaped vinyl hose 7, and when the fluid hardener 5 reaches the height of the injection pipe 6, the bag-shaped sheet 3 is pressed against the inner wall of the hollow columnar object 1 by the internal pressure of the fluid hardener 5 and is held at the bottom of the hollow columnar object 1. A high-strength reinforcing material with excellent productivity for the hollow columnar object 1 according to any one of the above configurations 1 to 7. [Configuration 9] The pushing rod 4 is a flexible resin rod or metal rod having a diameter smaller than the width of the drilled hole 2 of the hollow columnar object 1, and is formed in a shape without cross-sectional defects and with a strength that will not buckle with a predetermined mass of the fluid hardening material 5. A high-strength reinforcing material with excellent productivity for the hollow columnar object 1 according to any one of the above configurations 1 to 8. [Explanation of symbols]

[0062] 1 hollow columnar object 2 Drilling 3. Bag-shaped sheet 4 Push rod 5 Fluid hardening material 6 Injection tube 7 vinyl hose 10 Oribe 11 Connecting member 12 Belt winding and fixing mechanism 13 Fiber belt (connected belt) 14 Metal belt (fixing member) 15 Sheath tube (support part)

Claims

1. A reinforcing member for a hollow column, A bag-shaped sheet having a hollow columnar shape; a push rod for inserting the bag-shaped sheet into the hollow columnar object; a connecting member that detachably connects the bag-shaped sheet and the tip of the push rod; Equipped with the bag-shaped sheet has a configuration in which, when a first amount of the fluid hardening material is supplied therein, a portion of the bag-shaped sheet to which the fluid hardening material is not supplied can stand on its own in the longitudinal direction; Here, the first amount is an amount that does not exceed a lower end of a hole when the fluid hardening material is injected into the bag-shaped sheet inserted into the hollow portion of the hollow columnar object through the hole. Reinforcing member for hollow pillars.

2. The bag-shaped sheet is composed of high-elasticity fibers having a tensile modulus of 353 cN / dtex or more. The reinforcing member for a hollow pillar according to claim 1 .

3. The bag-shaped sheet is folded so that the crease is along the longitudinal direction. The reinforcing member for a hollow pillar according to claim 1 .

4. The bag-shaped sheet includes a woven fabric in which untwisted or twisted fiber bundles formed by bundling filament yarns are connected with weft yarns. The reinforcing member for a hollow pillar according to claim 1 .

5. The bag-shaped sheet is formed by impregnating the woven fabric with a resin and curing the resin. The reinforcing member for a hollow pillar according to claim 4.

6. The push rod is made of a flexible resin material or metal material. The reinforcing member for a hollow pillar according to claim 1 .

7. The push rod is configured to be divisible into a plurality of portions in the longitudinal direction. The reinforcing member for a hollow pillar according to claim 1 .

8. The push rod may further include a fixing mechanism for fixing the push rod at a predetermined position in the vertical direction relative to the hollow columnar member. The reinforcing member for a hollow pillar according to claim 1 .

9. The fixing mechanism includes: a support portion that supports the lower end of the push rod; a fixing member attached to a predetermined position of the hollow columnar object; a connecting belt that connects the support portion and the fixing member at a continuous distance; The reinforcing member for a hollow pillar according to claim 8, comprising:

10. 2. The reinforcing member for a hollow columnar object according to claim 1, further comprising an injection pipe member for injecting the fluid hardening material provided in the bag-shaped sheet.

11. the injection pipe member has a T-shaped flow path consisting of a first flow path that communicates the inside and outside of the bag-shaped sheet, a second flow path that communicates with the first flow path and extends along the longitudinal direction of the bag-shaped sheet to a side that is connected to the connecting member, and a third flow path that extends to the other side; the third flow path has a length that reaches the vicinity of the bottom of the hollow columnar object when the bag-shaped sheet is inserted into the hollow interior of the hollow columnar object; The reinforcing member for a hollow pillar according to claim 10.

12. A reinforcing kit for reinforcing a hollow column, comprising: A hollow columnar bag-like sheet; a connecting member that detachably connects the bag-shaped sheet and the tip of a pushing rod for inserting the bag-shaped sheet into the hollow columnar object; Equipped with The bag-shaped sheet has a configuration in which, when a first amount of fluid hardener is supplied inside, the portion to which the fluid hardener is not supplied can stand on its own in the longitudinal direction, wherein the first amount is an amount that does not exceed the lower end of the hole when the fluid hardener is injected into the bag-shaped sheet inserted into the hollow portion of the hollow columnar object through a hole provided in the hollow columnar object.

13. A reinforcing member for a hollow column, A hollow columnar bag-like sheet; a push rod for inserting the bag-shaped sheet into the hollow columnar object; a connecting member that detachably connects the bag-shaped sheet and the tip of the push rod; a step of preparing a reinforcing member for a hollow column, a step of inserting a reinforcing member for the hollow columnar object into the hollow portion through a hole provided in the hollow columnar object and communicating the hollow portion with the outside; a step of injecting a first amount of fluid hardening material into the bag-shaped sheet through the hole portion to allow the portion of the bag-shaped sheet to which the fluid hardening material has not been supplied to stand on its own in the longitudinal direction; a step of detaching the pusher rod from the hollow columnar reinforcing member and recovering it from the hollow portion; and injecting a second amount of flowable hardener into the bag-shaped sheet through the hole; Including, Here, the first amount is an amount that does not exceed the lower end of the hole portion of the hollow columnar object when the fluid hardening material is injected into the bag-shaped sheet. A method for reinforcing hollow columns.

14. In the step of inserting the reinforcing member for the hollow columnar object, after the reinforcing member for the hollow columnar object is inserted into the hollow portion, the position of the pushing rod in the vertical direction relative to the hollow columnar object is fixed. The method for reinforcing a hollow columnar object according to claim 13.

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