Foundation repair auxiliary member and foundation repair method using the same

Abstract

This invention provides a foundation repair support component and a foundation repair method using the same, which enable easy foundation repair of a consistent quality without relying on the experience of on-site workers. [Solution] The foundation repair auxiliary member 1 comprises an inner opposing portion 11 that faces the inner surface of the rising portion 51 of the foundation 5, an outer opposing portion 12 that faces the outer surface of the rising portion 51, a connecting portion 13 that connects the inner opposing portion 11 and the outer opposing portion 12 at the upper end of the rising portion 51, and a pressing portion 14 that is provided to be movable laterally through the outer opposing portion 12 and presses a plate material 7 positioned on the outside of the rising portion 51 against the rising portion 51.

Description

Technical Field

[0001] This invention relates to a foundation repair auxiliary member used when repairing a missing part that occurs in the upright part of the foundation, and a foundation repair method using the same.

Background Art

[0002] Patent Document 1 discloses a cloth foundation construction method in which a high cloth foundation formwork is placed on the outside and a low cloth foundation formwork is placed on the inside on a base concrete, and anchor support spring fittings are projected on the inner surface of one or both of the cloth foundation formworks and erected, and the main body concrete is placed up to the upper end of the inner cloth foundation formwork in the concrete placement space formed between the two inward and outward facing cloth foundation formworks.

[0003] In addition, Patent Document 2 discloses a metal fitting for supporting a concrete formwork that is erected with a steel beam formed by connecting an upper chord member and a lower chord member with a web member in two rows, and supports a concrete formwork that is erected with the two rows of steel beams arranged side by side. The metal fitting includes a separator located above the two rows of steel beams arranged side by side, and holding members respectively attached to the lower chord members of the two rows of steel beams arranged side by side. The holding members are provided with an attachment portion attached to the lower chord member of the steel beam and a holding portion that holds the concrete formwork outside the attachment portion. The concrete formwork is placed on the holding portion of the holding member, and the separator is located between the placed concrete formworks.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the foundation frame members disclosed in the above-mentioned patent documents are not suitable for use as auxiliary foundation repair members when concrete is poured into the damaged portion of a foundation that has been damaged by an earthquake or the like. Generally, when the damaged portion of a foundation is damaged by an earthquake or the like, a board is cut to an appropriate size at the repair site, and this board is placed in the damaged area, with battens or the like used as support rods to prevent the board from falling over. However, such work relies on the skill and experience of the on-site workers and has not been able to easily provide foundation repairs of a consistent quality.

[0006] In view of the above circumstances, this invention aims to provide a foundation repair auxiliary member and a foundation repair method using the same that can easily achieve foundation repair of a consistent quality without relying on the experience of on-site workers. [Means for solving the problem]

[0007] The foundation repair assisting member according to this invention is characterized in that, in order to solve the above problems, it comprises an inner opposing portion that faces the inner surface of the rising portion of the foundation, an outer opposing portion that faces the outer surface of the rising portion, a connecting portion that connects the inner opposing portion and the outer opposing portion at the upper end of the rising portion, and a pressing portion that is provided so as to be movable in the lateral direction through the outer opposing portion and presses a plate material placed on the outside of the rising portion against the rising portion.

[0008] With the above-described foundation repair support member, the pressing portion, which is provided to penetrate the outer opposing portion and move laterally, can press the board material placed on the outside of the rising portion against the rising portion. This eliminates the need to use battens or the like as support rods to prevent the board material applied to the foundation repair area from falling over, and allows for foundation repair of a consistent quality without relying on the skill or experience of the on-site worker.

[0009] The above-mentioned joint may be fixed to the upper surface or detachably positioned and may be provided with a tensioning part that can extend and retract in the vertical direction. In this case, when the hardening material is poured with the plate material in contact with the foundation repair auxiliary member, the lower side of the plate material may try to open up due to the pressure of the hardening material, and the foundation repair auxiliary member may not be able to hold it in place, potentially creating a gap on the lower side of the plate material. By providing the above-mentioned tensioning part, it becomes easier to maintain the proper posture of the foundation repair auxiliary member, so that a gap is less likely to form on the lower side of the plate material, and the leakage of the hardening material can be prevented.

[0010] The joint may be provided with a clamping portion that protrudes downward from the lower side and is positioned opposite the inner surface of the upper side of the plate material. In this case, the upper side of the plate material will be clamped between the clamping portion and the outer opposing portion, making it possible to press the plate material against the position of the notched portion that has formed in the rising portion.

[0011] The joint may be provided with a floating portion that contacts the upper inner end portion of the rising portion and separates the lower surface of the joint from the upper end of the rising portion. This prevents the repair hardening material from adhering to the lower surface of the joint.

[0012] A tensioning member may be attached to the lower side of the plate material by having one end of the linear member attached to the reinforcement inside the rising section, the linear member wrapped around from below the plate material, and the other end of the linear member attached to the outer opposing section or to the pressing section, thereby pulling the lower side of the plate material towards the outer surface of the rising section. As described above, there is a risk that the plate material may not be held down by the foundation repair auxiliary member and a gap may form on the lower side of the plate material, but by providing the tensioning member, it becomes less likely for a gap to form on the lower side of the plate material, and leakage of the hardening material can be prevented.

[0013] Furthermore, the foundation repair method of this invention is a foundation repair method that uses the above-mentioned foundation repair auxiliary member, applies the above-mentioned plate material to the chipped portion that has occurred in the rising part of the foundation, and then applies a hardening material to repair it. The process involves arranging the inner opposing portion, outer opposing portion, and connecting portion of the above-mentioned foundation repair auxiliary member in a horizontal plane, positioning the connecting portion above the rising portion, inserting the foundation repair auxiliary member between the rising portion and the house structure above it, and rotating it so that the inner opposing portion and the outer opposing portion are in a hanging position, thereby positioning the inner opposing portion against the inner surface of the rising portion and the outer opposing portion against the outer surface of the rising portion, respectively. The process involves using the pressing part described above to press the plate material, which is positioned on the outside of the rising portion, against the rising portion side, It is characterized by including.

[0014] Furthermore, the foundation repair method of this invention is a foundation repair method that uses the above-mentioned foundation repair auxiliary member having a tension portion, and repairs the foundation by applying a hardening material to the chipped portion that has occurred in the rising part of the foundation while the plate material is in contact with it, In cases where the reinforcement is not exposed in the aforementioned missing portion, the process involves chipping away the remaining hardened material to expose a portion of the reinforcement, The process involves arranging the inner opposing portion, outer opposing portion, and connecting portion of the above-mentioned foundation repair auxiliary member in a horizontal plane, positioning the connecting portion above the rising portion, inserting the foundation repair auxiliary member between the rising portion and the house structure above it, and rotating it so that the inner opposing portion and the outer opposing portion are in a hanging position, thereby positioning the inner opposing portion against the inner surface of the rising portion and the outer opposing portion against the outer surface of the rising portion, respectively. The process involves using the pressing part to press the plate material positioned on the outside of the rising part against the rising part, attaching one end of the linear member in the tension part to the exposed reinforcement, and wrapping the linear member in the tension part around the plate material from underneath, attaching the other end of the linear member to the foundation repair support member, and pulling the lower side of the plate material towards the outer surface of the rising part. It is characterized by including. [Effects of the Invention]

[0015] In the case of the present invention, in repairing by injecting a hardening material with a plate material applied to the chipped portion generated in the standing part of the foundation, it is possible to easily achieve foundation repair of a certain quality without relying on the experience of on-site workers or the like, and thus an effect is obtained.

Brief Description of the Drawings

[0016] [Figure 1] It is an explanatory drawing showing a foundation repair auxiliary member of an embodiment and a foundation repair portion repaired using the same. [Figure 2] It is a perspective view showing a foundation repair auxiliary member of an embodiment. [Figure 3] It is an explanatory drawing showing a foundation repair auxiliary member of an embodiment and a foundation repair method using the same. [Figure 4] It is an explanatory drawing showing the rotation of a foundation repair auxiliary member of an embodiment without a strut portion. [Figure 5] It is an explanatory drawing showing a foundation repair auxiliary member of an embodiment using a rectangular parallelepiped member instead of a strut portion. [Figure 6] It is a perspective view showing a foundation repair auxiliary member according to a modification example of an embodiment. [Figure 7] It is an explanatory drawing showing the foundation repair auxiliary member shown in FIG. 6 and a foundation repair portion repaired using the same. [Figure 8] It is an explanatory drawing showing a foundation repair auxiliary member according to a modification example of an embodiment and a foundation repair portion repaired using the same. [Figure 9] It is an explanatory drawing showing another example of the modification example shown in FIG. 8. [Figure 10] It is an explanatory drawing showing a foundation repair auxiliary member according to another modification example of an embodiment and a foundation repair portion repaired using the same.

Modes for Carrying Out the Invention

[0017] The embodiments of this invention will now be described based on the attached drawings. As shown in Figures 1 and 2, the foundation repair auxiliary member 1 of this embodiment has a structure comprising a roughly U-shaped main body consisting of an inner opposing part 11, an outer opposing part 12, and a connecting part 13, and a pressing part 14 and a bracing part 15. The main body is, for example, made by welding a roughly U-shaped cut steel plate to both edges of a bent plate made by bending a rectangular steel plate into a roughly U-shape.

[0018] The inner opposing portion 11 is the part that faces the inner surface of the rising portion 51 of the foundation 5, and the outer opposing portion 12 is the part that faces the outer surface of the rising portion 51. The connecting portion 13 is the part that connects the inner opposing portion 11 and the outer opposing portion 12 at the upper end of the rising portion 51. The width of the inner opposing portion 11, the outer opposing portion 12 and the connecting portion 13 is assumed to be narrower than the general dimensions (gap) between the rising portion 51 and the house structure 6 above it.

[0019] The pressing portion 14 consists of, for example, a nut 14a welded to the bent plate of the outer opposing portion 12, and a bolt 14b screwed into the nut 14a. The bolt 14b is movable laterally through the bent plate, and the tip of the threaded portion of the bolt 14b presses the plate material 7, which is positioned on the outside of the rising portion 51, against the rising portion 51. In this example, two pressing portions 14 are provided, spaced apart in the vertical direction.

[0020] The bracing portion 15 consists, for example, a nut 15a welded to the upper surface of the bent plate of the connecting portion 13, and a bolt 15b screwed into the nut 15a. The bracing portion 15 expands and contracts vertically as the bolt 15b moves up and down by its rotation. The set of nut 15a and bolt 15b screwed into it in the bracing portion 15 may be detachably arranged on the upper surface of the connecting portion 13.

[0021] Next, we will explain a foundation repair method in which a plate material 7 is applied to a chipped portion of the rising portion 51 of the foundation 5 using the foundation repair auxiliary member 1 described above, and then a hardening agent C (ready-mix concrete, etc.) is poured in to repair it. In this method, as shown by the dashed line in Figure 3, the inner opposing portion 11, the outer opposing portion 12, and the connecting portion 13 of the foundation repair auxiliary member 1 are arranged in a horizontal plane, with the connecting portion 13 positioned above the rising portion 51. With the foundation repair auxiliary member 1 inserted between the rising portion 51 and the house structure 6 above it, the inner opposing portion 11 and the outer opposing portion 12 are rotated so that they are positioned in a hanging position, thereby bringing the inner opposing portion 11 to face the inner surface of the rising portion 51 and the outer opposing portion 12 to face the outer surface of the rising portion 51.

[0022] Then, the pressing part 14 is used to press the plate material 7, which is positioned on the outside of the rising part 51, against the rising part 51. At this time, the back side of the plate material 7 pressed by the pressing part 14 is made to contact a flat area of ​​the rising part 51 that is not chipped.

[0023] Furthermore, the bolt 15b of the bracing portion 15 is rotated so that the head of the bolt 15b comes into contact with the lower surface of the house structure portion 6.

[0024] Then, using the board material 7 as a formwork, the hardening material C is poured in and cured, creating a rising section 51 where the hardening material C is located in the area where the above-mentioned chipping occurred. Once the hardening material C has hardened to the point where the board material 7 can be removed, the pressing section 14 and the bracing section 15 are loosened to remove the foundation repair auxiliary member 1, and the board material 7 is also removed.

[0025] With the above-described foundation repair auxiliary member 1, the pressing portion 14, which is provided to penetrate the outer opposing portion 12 and move laterally, can press the board material 7 placed on the outside of the rising portion 51 against the rising portion 51. This eliminates the need to use battens or the like as support rods to prevent the board material 7 applied to the repair area of ​​the foundation 5 from falling over, and allows for foundation repair of a consistent quality without relying on the skill or experience of the on-site workers.

[0026] As shown in Figure 4, if the foundation repair support member 1 does not have a bracing portion 15, the lateral pressure of the hardening material C being poured in will push the lower side of the plate material 7 outward, causing the foundation repair support member 1 to rotate and potentially leaking the hardening material C from underneath the plate material 7. However, if the structure has a bracing portion 15, the rotation of the foundation repair support member 1 can be suppressed, preventing the hardening material C from leaking out from underneath the plate material 7. The bracing portion 15 is not essential; for example, a rectangular parallelepiped member 8 can be made by cutting a prepared piece of lumber to an appropriate thickness, as shown in Figure 5, and inserting this rectangular parallelepiped member 8 between the upper surface of the connecting portion 13 and the lower surface of the house structure 6 to suppress the rotation of the foundation repair support member 1.

[0027] Figures 6 and 7 show a modified example of the foundation repair support member 1, namely foundation repair support member 1A. This foundation repair support member 1A includes a clamping portion 16 and a lifting portion 17.

[0028] The clamping portion 16 protrudes downward from the lower surface of the connecting portion 13 and is positioned opposite the upper inner surface of the plate material 7. The clamping portion 16 is made of, for example, a rectangular steel plate about 5 mm thick, and the long edge of this steel plate is fixed to the lower surface of the connecting portion 13 by welding.

[0029] With the clamping portion 16, the upper side of the plate material 7 is clamped between the clamping portion 16 and the outer opposing portion 12, making it possible to press the plate material 7 even at the location of the missing portion in the rising portion 51. The distance between the clamping portion 16 and the outer opposing portion 12 is made somewhat larger than the thickness of the plate material 7 used.

[0030] The floating portion 17 contacts the upper inner end portion of the rising portion 51, thereby lifting the lower surface of the connecting portion 13 relative to the upper end of the rising portion 51. The floating portion 17 is made of, for example, a rectangular steel plate about 5 mm thick, and the long edge of this steel plate is fixed to the inner surface of the inner opposing portion 11 by welding. The floating portion 17 may also be fixed to the lower surface of the connecting portion 13.

[0031] The presence of the floating portion 17 prevents the hardening agent C, which is applied for repair, from adhering to the lower surface of the connecting portion 13.

[0032] Figure 8 shows a modified example of the foundation repair support member 1, namely foundation repair support member 1B. This foundation repair support member 1B includes a tensioning portion 18. The tensioning portion 18 has a hook portion 18a at one end of a linear member (metal wire, resin wire, etc.), and this hook portion 18a is designed to hook onto the reinforcement bars 51a inside the rising portion 51. The other end of the linear member is tied, for example, to the lower of two pressing portions 14 that are spaced apart in the vertical direction, thereby pulling the lower side of the plate material 7 towards the outer surface of the rising portion 51. This prevents the lower side of the plate material 7 from being pushed outward by the lateral pressure of the hardening material C being introduced, thereby preventing the foundation repair support member 1 from rotating and preventing the hardening material C from leaking out through the gap created on the lower side of the plate material 7.

[0033] The method of repairing the missing portion of the rising section 51 using the foundation repair auxiliary member 1B equipped with a tensioning portion 18 is generally the same as the method of repairing the missing portion of the rising section 51 using the foundation repair auxiliary member 1 described above, but differs in that it involves hooking the hook portion 18a of the tensioning portion 18 onto the reinforcement bar 51a inside the rising section 51.

[0034] If the damage to the rising section 51 due to an earthquake or the like extends to the area around the reinforcement bar 51a, exposing the reinforcement bar 51a, the hook portion 18a can be hooked onto the reinforcement bar 51a in this state. On the other hand, if the reinforcement bar 51a is not exposed, the hardened material around the reinforcement bar 51a is chipped away by hand to expose the reinforcement bar 51a, and then the hook portion 18a is hooked onto this exposed area. Specifically, the pressing portion 14 is used to press the plate material 7, which is positioned on the outside of the rising section 51, against the rising section 51, and at the same time, one end of the linear member of the tension portion 18 is hooked onto the exposed reinforcement bar 51a, and the other end of the tension portion 18 is tied to the bolt 14b of the pressing portion 14 of the foundation repair auxiliary member 1B, and the lower side of the plate material 7 is pulled towards the outer surface of the rising section 51.

[0035] Subsequently, the hardening agent C is poured into the plate material 7 using it as a formwork and allowed to cure, thereby creating a rising section 51 where the hardening agent C is located in the area where the aforementioned chipping occurred. Once the hardening agent C has hardened to the point where the plate material 7 can be removed, the pressing section 14 and the bracing section 15 are loosened to remove the foundation repair auxiliary member 1B, and the plate material 7 is also removed.

[0036] Figure 9 shows another example of the foundation repair auxiliary member 1. In the above example, the other end of the tension portion 18 is tied to the bolt 14b of the pressing portion 14 in the foundation repair auxiliary member 1B, but the other end of this tension portion 18 may also be tied to, for example, the projection 121 provided on the lower central side of the bent plate in the outer opposing portion 12.

[0037] Figure 10 shows a modified example of the foundation repair support member 1, namely foundation repair support member 1C. This foundation repair support member 1C includes both a bracing portion 15 and a tensioning portion 18. If the height of the rising portion 51 is high, the lateral pressure of the hardening material C being introduced pushes the lower side of the plate material 7 outward, making it easy for the foundation repair support member 1 to rotate. However, with the foundation repair support member 1C, it is possible to prevent the foundation repair support member 1C from rotating and to prevent the hardening material C from leaking out through the gap created on the lower side of the plate material 7.

[0038] Although embodiments of this invention have been described above with reference to the drawings, this invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiments within the same scope as this invention, or within the equivalent scope. [Explanation of symbols]

[0039] 1: Foundation repair support member 1A: Foundation repair support member 1B: Foundation repair support member 1C: Foundation repair support member 5: Basics 6: House structure 7: Plate material 8: Rectangular parallelepiped member 11: Inner opposing part 12: Outer opposing part 13: Connecting part 14: Pressing part 14a: Nut 14b: Bolt 15: Tension part 15a: Nut 15b: Bolt 16: Clamping part 17: Floating section 18: Tensile section 18a: Hook part 51: Upright section 51a: Reinforcement 121:Protrusion C: Hardening material

Claims

1. A foundation repair assisting member characterized by comprising: an inner opposing portion facing the inner surface of the rising portion of the foundation; an outer opposing portion facing the outer surface of the rising portion; a connecting portion connecting the inner opposing portion and the outer opposing portion at the upper end of the rising portion; and a pressing portion provided to be movable laterally through the outer opposing portion and pressing a plate material positioned on the outside of the rising portion against the rising portion.

2. A foundation repair support member according to claim 1, characterized in that it comprises a bracing portion that is fixed to the upper surface of the connecting portion or detachably arranged and is expandable and contractible in the vertical direction.

3. A foundation repair assisting member according to claim 1, characterized in that it comprises a clamping portion that protrudes downward from the lower surface side of the joint portion and is positioned opposite the inner surface of the upper side of the plate material.

4. A foundation repair assisting member according to claim 1, characterized in that it includes a floating portion that contacts the inner upper end portion of the rising portion and separates the lower surface of the connecting portion from the upper end of the rising portion.

5. A foundation repair assisting member according to claim 1, characterized in that one end of a linear member is attached to the reinforcement inside the rising portion, the linear member is wrapped around from below the plate material, and the other end of the linear member is attached to the outer opposing portion or to the pressing portion, thereby providing a tensioning portion that pulls the lower side of the plate material towards the outer surface of the rising portion.

6. A foundation repair method comprising using a foundation repair auxiliary member according to any one of claims 1 to 4, applying the plate material to a chipped portion in the rising part of the foundation, and then pouring in a hardening agent to repair it, The process involves arranging the inner opposing portion, outer opposing portion, and connecting portion of the above-mentioned foundation repair auxiliary member in a horizontal plane, positioning the connecting portion above the rising portion, inserting the foundation repair auxiliary member between the rising portion and the house structure above it, and rotating it so that the inner opposing portion and the outer opposing portion are in a hanging position, thereby positioning the inner opposing portion against the inner surface of the rising portion and the outer opposing portion against the outer surface of the rising portion, respectively. The process involves using the pressing part described above to press the plate material, which is positioned on the outside of the rising portion, against the rising portion side, A basic repair method characterized by including the following.

7. A foundation repair method comprising using the foundation repair auxiliary member described in claim 5, applying the plate material to the chipped portion of the rising part of the foundation, and then pouring in a hardening agent to repair it, In cases where the reinforcement is not exposed in the aforementioned missing portion, the process involves chipping away the remaining hardened material to expose a portion of the reinforcement, The process involves arranging the inner opposing portion, outer opposing portion, and connecting portion of the above-mentioned foundation repair auxiliary member in a horizontal plane, positioning the connecting portion above the rising portion, inserting the foundation repair auxiliary member between the rising portion and the house structure above it, and rotating it so that the inner opposing portion and the outer opposing portion are in a hanging position, thereby positioning the inner opposing portion against the inner surface of the rising portion and the outer opposing portion against the outer surface of the rising portion, respectively. The process involves using the pressing part to press the plate material positioned on the outside of the rising part against the rising part, attaching one end of the linear member in the tension part to the exposed reinforcement, and wrapping the linear member in the tension part around the plate material from underneath, attaching the other end of the linear member to the foundation repair support member, and pulling the lower side of the plate material towards the outer surface of the rising part. A basic repair method characterized by including the following.

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