JP4882895B2 - Reinforcement method of concrete support foundation - Google Patents

Description

  The present invention relates to a method for reinforcing a concrete support foundation such as a concrete cloth foundation having a guard rail or a concrete retaining wall that is difficult to reinforce after completion.

  As an example of a concrete support foundation extending in one longitudinal direction on a horizontal plane, there is a concrete support foundation fixing a guardrail. For example, in a concrete column foundation that supports a column of a guardrail, the column and the top of the foundation serve as a fulcrum with respect to a load applied from a side surface such as a collision, and the column attempts to rotate around this. At that time, a predetermined amount of reinforcing bars determined in Non-Patent Document 1 are arranged so that the concrete support foundation supporting the support is not destroyed.

  However, the guardrail was loaded under conditions where it was assumed that a side load exceeding that given in the design conditions before the completion of construction was applied under the condition of the construction rod where the reinforcing bars were forgotten or the wrong size was placed. In this case, it is considered that the concrete support foundation supporting the guardrail is sheared and broken.

  In the case of the case, shear reinforcement is performed on the concrete support foundation. As a reinforcement method, once the concrete strut foundation is broken and the rebar is reinserted to place concrete, or when it is difficult to break, the rebar is installed on the side of the concrete strut foundation and the concrete is cast. There is a way to reinforce it.

  On the other hand, generally known shear reinforcement methods for concrete structures include a continuous fiber sheet bonding method and a steel plate winding method. The continuous fiber sheet bonding method is a method in which, for example, a continuous fiber sheet for reinforcement is wound around a concrete column or beam and is reinforced by impregnating and bonding with a resin. The steel sheet winding method is a method in which, for example, a steel plate is fixed to a concrete column or beam with an anchor or the like, and a gap formed between the concrete structure and the steel plate is filled with resin or mortar to be reinforced.

  In addition, Patent Document 1, Patent Document 2, and Non-Patent Document 2 are examples of shear reinforcement methods for flat members that are difficult to be reinforced by winding, such as slab-integrated beams, walls, and wall-type piers. Has been proposed.

  For example, Patent Document 1 discloses a method in which a continuous fiber sheet is bonded to a wall that cannot be wound, and is fixed to a surrounding column or beam using a continuous fiber fixing anchor fixed to the continuous fiber sheet. It is.

  In Patent Document 2, for example, a continuous fiber sheet is bonded to an exposed surface such as a beam side surface or under a beam to a concrete member that cannot be wound, such as a slab-integrated beam. In this method, the continuous fiber fixing anchors are passed through the crossing portions of the beams, and the fixing anchors are joined to each other on the upper surface of the beam, and the fixing anchors and the continuous fiber sheet are joined to each other to wind up and reinforce the member.

Non-Patent Document 2 describes the installation of a penetration steel material and fixing section steel installed near the middle of the wall for a wall-type pier with a wall length ratio of 3: 1 or more. This is a method of performing shear reinforcement.
JP 2000-45565 A (Claim 1, FIG. 21) JP 2000-27446 A (Claim 1, FIG. 21) (Japan) Japan Road Association, “Guidelines for Installation of Guard Fence”, 3rd Edition, Japan, (Japan) Japan Road Association, June 30, 1978, p.77-81) (Japan Highway Public Corporation, “Design Guidelines, Second Collection: Bridges, Retaining Walls, and Calverts”, Japan, Road Welfare Society, November 1997, p.5-9-5-10)

  However, when the concrete support foundation is removed and reconstructed, the procedure is to break the concrete, place a predetermined amount of reinforcing bars, place the concrete again, and then cure the concrete. This method requires a work period from concrete removal to completion of construction.

  On roads that have already started operation, the guardrail itself will also be removed, and measures such as placing temporary guardrails around the concrete support foundation reinforcement yard are required as an alternative. In this case, since the temporary guard rail and the reinforcement work yard occupy the traffic width of the road, there is a problem in that the period during which traffic is hindered becomes long.

  When increasing the thickness of reinforced concrete, although it is not necessary to install a temporary guardrail, a construction period is required as in the case of removing and reconstructing the concrete support foundation. Furthermore, increasing the thickness of the reinforced concrete increases the weight of the concrete support foundation, and increases the weight load on the ground supporting the foundation. For example, if the support capacity of the foundation is not sufficient with respect to the dead weight of the concrete support foundation before reinforcement, the reinforced concrete is increased and thickened, so the weight of the concrete support foundation increases and the support capacity of the foundation ground is insufficient. For this reason, there are cases in which reinforcement of the foundation ground is required separately from the reinforcement of the concrete support foundation, and there is a problem that the reinforcement cost also increases.

  Since Patent Document 1 is a method for increasing the holding strength of a building during an earthquake and is intended for shear reinforcement in the wall surface, this method has a problem in the reinforcement effect against shear that works out of plane.

  Since Patent Document 2 describes a shear reinforcement method at a portion where a slab and a beam, and a wall and a column intersect, this method has a problem in a reinforcement effect against an out-of-plane shear that is a surface member and works locally. is there.

  Reference 2 is shear reinforcement in the out-of-plane direction, but resists the entire member, and therefore there is a problem in the reinforcement effect against local out-of-plane shear. Moreover, since the penetration steel material and the fixing shape steel are used, the weight of the reinforcing material is heavy and the workability is not good. Moreover, reinforcement in mountainous areas, cliffs, and high places is not only easy to work with, but also makes it difficult to carry in materials because materials are carried in manually.

  The present invention has been made in view of the above-described problems, and uses existing materials to improve workability at a low cost and in a short period of time, particularly in high places and narrow construction sites. An object of the present invention is to provide a method for reinforcing a concrete support foundation which can exhibit the effect of improvement and does not increase its own weight.

In order to solve the above problems, the present invention employs the following configuration. That is,
(1) A method for reinforcing a concrete strut foundation extending in one longitudinal direction on a horizontal plane, the strut being fixed to the concrete strut foundation, and on the circumferential side surface of the strut with respect to the longitudinal direction A through-hole is provided in the concrete support foundation at a predetermined angle in the horizontal plane, and a fiber-reinforced plastic reinforcing sheet composed of a continuous fiber sheet and a matrix resin is pasted on both longitudinal surfaces of the concrete support foundation. A reinforcing method for a concrete column foundation, wherein a reinforcing anchor made of fiber reinforced plastic composed of a bundle and a matrix resin is disposed in the through hole, and the reinforcing anchor and the reinforcing sheet are joined.

  (2) The concrete strut foundation reinforcing method according to (1), wherein the through hole is provided in a range of 45 ° to 90 ° on a horizontal plane with respect to the longitudinal direction.

  (3) When the reinforcing anchor is placed in the through hole, a continuous fiber bundle having flexibility is inserted, and then the continuous fiber bundle is impregnated and cured with the matrix resin in the through hole. The method for reinforcing a concrete strut foundation according to (1) or (2), which is a reinforced plastic.

  (4) The reinforcing anchor is impregnated with the matrix resin when placed in the through-hole, and is cured in the through-hole in a state where the matrix resin is in an uncured state to be fiber reinforced plastic. The method for reinforcing a concrete strut foundation according to (1) or (2).

  (5) The concrete according to any one of (1) to (4), wherein the reinforcing anchor has an overall shape formed in a dumbbell shape or a bow tie shape by spreading both ends in a fan shape or a circular shape. Reinforcement method of support foundation.

  (6) The continuous fiber bundle and the continuous fiber sheet are at least one selected from the group consisting of carbon fiber, aramid fiber, glass fiber, polyparaphenylene benzoxazole (PBO) fiber, and polyethylene fiber having a molecular weight of 1 million or more. The reinforcement method of the foundation | substrate base | substrate of any one of (1)-(5) which consists of continuous fiber of these.

  (7) The matrix resin is at least one matrix resin selected from the group consisting of unsaturated polyester resins, epoxy resins, phenol resins, vinyl ester resins, and methacrylic (MMA) resins. The reinforcement method of the foundation of a concrete pillar as described in any one.

  (8) After affixing one layer of the reinforcing sheet on both surfaces of the concrete support foundation, both ends of the reinforcing anchor were joined to the reinforcing sheet, and from above, further composed of a continuous fiber sheet and a matrix resin. The method for reinforcing a concrete column foundation according to any one of (1) to (7), wherein one or more layers of fiber reinforced plastic reinforcing sheets are attached.

  (9) The method for reinforcing a concrete support foundation according to any one of (1) to (8), wherein a fiber direction of the reinforcing sheet is a horizontal direction.

  (10) The reinforcing sheets are staggered on both surfaces in the longitudinal direction of the concrete support foundation, and the planar shape of a series of fiber reinforced plastics via the reinforcing anchors joining the reinforcing sheets to each other is The reinforcement method of the concrete support | pillar foundation in any one of (1)-(9) which is a key shape which has two convex shapes.

  (11) The method for reinforcing a concrete column foundation according to (10), wherein the series of fiber reinforced plastics are arranged in the vertical direction in the concrete column foundation in two or more stages.

  (12) The reinforcing column foundation reinforcing method according to (10) or (11), wherein the series of fiber reinforced plastics have different convex directions between the upper part and the lower part of the concrete pillar foundation.

  According to the reinforcing method of the present invention, it is possible to easily reinforce a concrete support foundation using existing materials in a short construction period. In addition, since the reinforcing material is installed on the surface of the concrete surface on the side where the load is received, the stress generated in the concrete can be prevented from being concentrated locally, and the force is uniformly borne by the reinforcing material. The fracture strength of existing concrete support foundations can be improved.

As a concrete support foundation that is reinforced by the reinforcing method of the present invention and that extends in one longitudinal direction on a horizontal plane, for example, a support rail, guard, fence, or the like that extends in one longitudinal direction on a horizontal plane is fixed. Concrete foundations can be mentioned. That is, the present invention is used to reinforce a concrete support foundation for fixing, for example, a guardrail, a fence, a fence, etc., but the load applied from the side is particularly large and the strength of the concrete support foundation is required. DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail based on drawings of an example using a guard rail as an example.

  FIG. 1 is a cross-sectional view of a common guardrail concrete support foundation. FIG. 2 is a plan view of a concrete guard foundation of a general guardrail in the AA cross section of FIG. 1. FIG. 3 is a plan view of a concrete guard foundation of a general guardrail in the BB cross section of FIG. 1. Normally, as shown in FIGS. 1, 2, and 3, two reinforcing bars 11 having a diameter of 16 mm are arranged at the upper part and one reinforcing bar 12 having a diameter of 13 mm is arranged at the lower part with respect to the periphery of the support column.

  However, the case where the required strength of the concrete support foundation 1 becomes ineligible due to dredging work such as forgetting to put in the reinforcing bars and the change of load conditions, and the concrete support foundation 1 is destroyed at the same time the side load 3 is applied to the guardrail support 2 There is. In order to prevent such a case from occurring, the concrete column foundation 1 is reinforced using the reinforcing method of the present invention.

  According to the present invention, with respect to the concrete strut foundation 1 extending in one longitudinal direction on a horizontal plane to which the guardrail strut 2 is fixed, around the strut fixed in the concrete strut foundation 1, By joining the reinforcing anchors 31 penetrated at a predetermined angle in the horizontal plane with respect to the longitudinal direction and the reinforcing sheets 41 attached to both surfaces in the longitudinal direction of the concrete strut foundation 1, the concrete strut foundation 1 Reinforce. FIG. 4 shows a cross-sectional view of the concrete support foundation of the guardrail after it has been reinforced using the reinforcing method of the present invention.

  First, the concrete column foundation 1 is drilled by an appropriate means such as a drill, and the through hole 21 is installed in the concrete column foundation 1. The state in which the through hole 21 is provided is in the AA cross section of FIG. 4, and the plan view of the concrete support foundation 1 in which the through hole 21 is installed is in FIG. 5 and in the BB cross section of FIG. FIG. 6 shows a plan view of the concrete support foundation 1 in which the holes 21 are installed.

  As shown in FIGS. 5 and 6, the through hole 21 is provided on the side surface in the circumferential direction of the guard rail column 2, and it is preferable that the outer edge of the through hole 21 and the outer edge of the guard rail column 2 are separated by 5 cm or more. Further, the upper through hole 21 corresponding to the AA cross section of FIG. 4 has a through angle θ in the range of 45 ° to 90 ° in the horizontal plane with respect to the longitudinal direction of the concrete support foundation 1 of FIG. The lower through-hole 21 corresponding to the BB cross section in FIG. 4 is provided in the shape of a mold, and the through angle θ is 45 ° to 90 ° in the horizontal plane with respect to the longitudinal direction of the concrete support foundation 1 in FIG. It is preferable to provide an inverted octagonal shape that falls within the above range. In view of not damaging the concrete strut foundation 1 and shortening the penetration extension, the penetration angle θ of the upper and lower through holes 21 is more preferably 90 °.

  Next, a reinforcing sheet 41 made of a fiber reinforced plastic composed of a continuous fiber sheet and a matrix resin is attached to both longitudinal surfaces of the concrete support foundation 1, and reinforcing anchors 31 are installed in the installed through holes 21. The reinforcing sheet 41 and the reinforcing anchor 31 that have been installed and attached are joined together. Here, FIG. 7 shows one shape of the reinforcing anchor 31 to be installed. 8, 9, 10, and 11 are diagrams illustrating an example of a preferable end shape of the reinforcing anchor 31. FIG. 12 is a rear view of the concrete support foundation of the guard rail after the reinforcement anchor is installed. FIG. 13 is a front view of the concrete support foundation of the guardrail after the reinforcement anchor is installed.

  As shown in FIG. 12, the reinforcing sheet 41 is attached to one side of the longitudinal surface of the concrete support foundation 1 as shown in FIG. The fiber direction of the reinforcing sheet 41 is attached in the horizontal direction.

  When the reinforcing anchor 31 installed in the through hole 21 is inserted into the through hole 21, after inserting a continuous fiber bundle having flexibility, the continuous fiber bundle is inserted into the matrix resin in the through hole 21. When the resin is impregnated and cured to form fiber reinforced plastic or disposed in the through hole 21, the through hole is already impregnated with the matrix resin and the matrix resin is in an uncured state. It is preferable to cure within 21 to obtain a fiber reinforced plastic. Here, the continuous fiber bundle having flexibility means a continuous fiber bundle in which all of the continuous fibers formed are not broken when a ring having a radius of 10 cm is formed using the continuous fiber bundle. More specifically, the continuous fiber bundle which consists of a continuous fiber demonstrated below is illustrated.

  The reinforcing anchor 31 has a continuous fiber bundle at the center, but is preferably formed in a dumbbell shape or a bow tie shape by spreading both ends in a fan shape or a circular shape. Here, it is important that the shape of both ends of the reinforcing anchor 31 is an expanded planar shape, not only the fan shape shown in FIG. 8 and the circular shape shown in FIG. Although a fan shape as shown in FIG. 11 may be used, it is preferably a fan shape that can be spread while keeping the fibers in a straight line.

  The portion of the reinforcing anchor 31 joined to the reinforcing sheet 41 bonded to the front side and the back side is a portion of the reinforcing anchor 31 that protrudes from both longitudinal surfaces of the concrete column foundation 1, but preferably In other words, the reinforcing anchor 31 is joined at the fan-shaped or circular-shaped portions at both ends.

  Here, the continuous fiber sheet constituting the reinforcing sheet 41 and the continuous fiber bundle constituting the reinforcing anchor 31 are carbon fiber, aramid fiber, glass fiber, polyparaphenylene benzoxazole (PBO) fiber and 1 million or more. It is preferably made of at least one kind of continuous fiber selected from the group consisting of polyethylene fibers having the molecular weight, but more preferably high-strength carbon fiber. The matrix resin constituting the reinforcing sheet 41 and the reinforcing anchor 31 is at least one matrix resin selected from the group consisting of unsaturated polyester resins, epoxy resins, phenol resins, vinyl ester resins, and methacrylic (MMA) resins. However, it is more preferable to use an epoxy resin with high durability and usability.

  The through-hole 21 is preferably sufficiently filled with the matrix resin so that no gap remains in the through-hole 21 after the reinforcement anchor 31 is inserted.

  Next, after joining both ends of the reinforcing sheet 41 and the reinforcing anchor 31, the fiber-reinforced plastic reinforcing sheet 42 composed of the above-mentioned continuous fiber sheet and the above-mentioned matrix resin is pasted again from above. Thus, it is possible to form a reinforcing material to be a series of fiber-reinforced plastics that can exhibit the reinforcing effect of the present invention. Here, FIG. 14 is a rear view of a concrete support foundation of a guardrail in which a reinforcing sheet is bonded onto a reinforcing anchor. FIG. 15 is a front view of a concrete support foundation of a guardrail in which a reinforcing sheet is bonded on a reinforcing anchor. FIG. 16 is a plan view of a concrete support foundation of a guardrail in which a reinforcing sheet is bonded onto a reinforcing anchor when the through angle is 45 ° in the AA cross section of FIG. 4. FIG. 17 is a plan view of a concrete support foundation of a guardrail in which a reinforcing sheet is bonded on a reinforcing anchor when the through angle is 45 ° in the BB cross section of FIG. 4. FIG. 18 is a plan view of the concrete support foundation of the guardrail in which the reinforcing sheet is bonded on the reinforcing anchor when the through angle is 90 ° in the AA cross section of FIG. 4. FIG. 19 is a plan view of a concrete support foundation of a guardrail in which a reinforcing sheet is bonded on a reinforcing anchor when the through angle is 90 ° in the BB cross section of FIG. 4. FIG. 20 is a rear view of the concrete support foundation of the guardrail in which a protective sheet is attached to the reinforced concrete support foundation. FIG. 21 is a front view of a concrete support foundation of a guardrail in which a protective sheet is attached to a reinforced concrete support foundation.

In the present invention, it is preferable that one or more layers of the reinforcing sheet 42 are attached to the upper surface of the reinforcing sheet 41 and the reinforcing anchor 31 joined as described above so that the fiber direction is the horizontal direction. . The number of layers of reinforcing sheet 42 pasted, for example if the tensile rigidity of the reinforcement equivalent diameter 16mm was a reinforcing amount required, the carbon fiber sheet which is one material of the reinforcing sheet 41, basis weight 200 g / m ² ( When the thickness is 0.111 mm, the tensile strength is 3400 N / mm ² or more, the short-term allowable tensile strength is set to 2/3 of the tensile strength), and the width is 10 cm, three layers are attached.

  Furthermore, in the present invention, the planar shape of the reinforcing material of the series of fiber reinforced plastics via the reinforcing anchors joining the reinforcing sheets is staggered on both longitudinal surfaces of the concrete support foundation 1. In addition, it is preferable to reinforce such that it has a key shape with one convex shape by way of the reinforcing anchor 31 that connects the overlapping reinforcing sheets 41 and 42 to each other.

  In the present invention, the reinforcing material of a series of fiber-reinforced plastics via the reinforcing anchors joining the reinforcing sheets is arranged in the concrete column foundation 1 in two or more steps in the vertical direction. It is preferable to arrange and reinforce the reinforcing material in such a manner that the convex direction of the reinforcing material is different between the upper part of the column base 1 which is the AA cross section in FIG. 4 and the lower part which is the BB cross section of FIG. That is, as described above, the upper part that becomes the AA cross section is convex with respect to the traveling direction of the side load 3, and the lower part that is BB cross section is convex with respect to the opposite direction of the side load 3. It is preferable to do.

  Examples of the planar form of the series of formed fiber reinforced plastic reinforcements are as shown in FIGS. That is, when the penetration angle of the concrete support foundation 1 is 45 °, the upper part of the concrete support foundation 1 has a planar form shown in FIG. 16, and the lower part of the concrete support foundation 1 has a planar form shown in FIG. Become. When the penetration angle of the concrete support foundation 1 is 90 °, the upper part of the concrete support foundation 1 has a planar form shown in FIG. 18, and the lower part of the concrete support foundation 1 has a planar form shown in FIG. Become.

  As shown in FIG. 20, the back side is as shown in FIG. 20, and the front side is shown in FIG. It is preferable to affix the protective sheet 43 in a planar form. The protective sheet 43 is preferably made of the same fiber-reinforced plastic as the reinforcing sheets 41 and 42, and more preferably, the protective sheet 43 is stuck so that the fiber direction is horizontal.

  The reinforcing method of the present invention is used for reinforcing a concrete support foundation, but the application range is not limited to the reinforcement of a concrete support foundation, and can be applied to the reinforcement of a concrete structure such as a retaining wall integrated with the support. .

It is sectional drawing of the concrete support | pillar foundation of a common guardrail. It is an AA cross section of FIG. 1, and is a top view of the concrete support | pillar foundation of a common guardrail. It is a BB cross section of FIG. 1, and is a top view of the concrete support | pillar foundation of a common guardrail. It is sectional drawing of the concrete support | pillar foundation of the guardrail after reinforcement. FIG. 5 is a plan view of a concrete support foundation provided with a through hole in the AA cross section of FIG. 4. FIG. 5 is a plan view of a concrete support foundation in which a through hole is provided in the BB cross section of FIG. 4. It is a top view of a reinforcement anchor. It is a figure which shows an example of the edge part shape of a reinforcement anchor. It is a figure which shows an example of the edge part shape of a reinforcement anchor. It is a figure which shows an example of the edge part shape of a reinforcement anchor. It is a figure which shows an example of the edge part shape of a reinforcement anchor. It is a rear view of the concrete support | pillar foundation of the guardrail after reinforcement anchor installation. It is a front view of the concrete support | pillar foundation of the guardrail after reinforcement anchor installation. It is a rear view of the concrete support | pillar foundation of the guardrail which adhere | attached the reinforcement sheet | seat on the reinforcement anchor. It is a front view of the concrete support | pillar foundation of the guardrail which adhere | attached the reinforcement sheet | seat on the reinforcement anchor. FIG. 5 is a plan view of a concrete support foundation of a guardrail in which a reinforcing sheet is bonded on a reinforcing anchor when the through angle is 45 ° in the AA cross section of FIG. 4. FIG. 5 is a plan view of a concrete support foundation of a guardrail in which a reinforcing sheet is bonded on a reinforcing anchor when the through angle is 45 ° in the BB cross section of FIG. 4. FIG. 5 is a plan view of a concrete support foundation of a guardrail in which a reinforcing sheet is bonded on a reinforcing anchor when the through angle is 90 ° in the AA cross section of FIG. 4. It is a BB cross section of Drawing 4, and is a top view of the concrete support foundation of the guard rail which adhered the reinforcement sheet on the reinforcement anchor at the time of making the penetration angle into 90 degrees. It is a rear view of the concrete support | pillar foundation of the guardrail which affixed the protection sheet. It is a front view of the concrete support | pillar foundation of the guardrail which affixed the protection sheet.

Explanation of symbols

1: concrete support foundation 2: guard rail support 3: side load 11: upper rebar 12: lower rebar 21: through hole 31: reinforcement anchor 32: reinforcement anchor end 41: reinforcement sheet 42: reinforcement sheet 43: protective sheet θ: Penetration angle AA: Upper rebar position of concrete support foundation BB: Lower rebar position of concrete support foundation

Claims (12)

A method of reinforcing a concrete support foundation extending in one longitudinal direction on a horizontal plane, wherein the support pillar is fixed to the concrete support foundation, and a predetermined horizontal surface is provided on a circumferential side surface of the support with respect to the longitudinal direction. The concrete strut foundation is provided with a through hole at an angle of, and a fiber reinforced plastic reinforcing sheet composed of a continuous fiber sheet and a matrix resin is pasted on both side surfaces of the concrete strut foundation in the longitudinal direction. A reinforcing method for a concrete column foundation, characterized in that a reinforcing anchor made of resin made of fiber reinforced plastic is disposed in the through hole, and the reinforcing anchor and the reinforcing sheet are joined. The said through-hole is a reinforcement method of the concrete support | pillar foundation of Claim 1 provided in the range of 45 degrees-90 degrees in the horizontal surface with respect to the said longitudinal direction. When the reinforcing anchor is disposed in the through-hole, after inserting a continuous fiber bundle having flexibility, the continuous fiber bundle is impregnated and cured with the matrix resin in the through-hole. The method for reinforcing a concrete strut foundation according to claim 1 or 2, wherein: The reinforcing anchor is impregnated with the matrix resin when disposed in the through hole, and is cured in the through hole in a state where the matrix resin is in an uncured state to form a fiber reinforced plastic. The method for reinforcing a concrete strut foundation according to claim 1 or 2. The method for reinforcing a concrete column foundation according to any one of claims 1 to 4, wherein the reinforcing anchor is formed in a dumbbell shape or a bow tie shape as a whole by spreading both ends in a fan shape or a circular shape. . The continuous fiber bundle and the continuous fiber sheet are at least one continuous fiber selected from the group consisting of carbon fiber, aramid fiber, glass fiber, polyparaphenylene benzoxazole (PBO) fiber, and polyethylene fiber having a molecular weight of 1 million or more. The reinforcement method of the foundation | substrate base of any one of Claims 1-5 which consists of these. The matrix resin is at least one matrix resin selected from the group consisting of unsaturated polyester resins, epoxy resins, phenol resins, vinyl ester resins, and methacrylic (MMA) resins. Reinforcement method for concrete cleat foundation. After affixing the reinforcing sheet to one surface on both sides of the concrete support foundation, both ends of the reinforcing anchor are joined to the reinforcing sheet, and from above, a fiber reinforced plastic further comprising a continuous fiber sheet and a matrix resin The reinforcement method of the concrete support | pillar foundation in any one of Claims 1-7 which affixes one or more layers of a reinforcement sheet | seat. The reinforcing method of a concrete support foundation according to any one of claims 1 to 8, wherein a fiber direction of the reinforcing sheet is a horizontal direction. The reinforcing sheets are staggered on both longitudinal surfaces of the concrete support foundation, and a series of fiber reinforced plastic planar shapes via the reinforcing anchors joining the reinforcing sheets to each other have a single convex shape. The reinforcement method of the concrete support | pillar foundation in any one of Claims 1-9 which is a key shape which has. The method for reinforcing a concrete strut foundation according to claim 10, wherein the series of fiber reinforced plastics are arranged in two or more stages in the vertical direction on the concrete strut foundation. The method for reinforcing a concrete column foundation according to claim 10 or 11, wherein the series of fiber reinforced plastics has different directions of protrusions on an upper part and a lower part of the concrete column foundation.

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