JP2018199905A - Repair structure of sprayed slope frame and repair method thereof - Google Patents

Repair structure of sprayed slope frame and repair method thereof Download PDF

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JP2018199905A
JP2018199905A JP2017103743A JP2017103743A JP2018199905A JP 2018199905 A JP2018199905 A JP 2018199905A JP 2017103743 A JP2017103743 A JP 2017103743A JP 2017103743 A JP2017103743 A JP 2017103743A JP 2018199905 A JP2018199905 A JP 2018199905A
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frame
repair
pressure receiving
reinforcing plate
spraying method
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武 沓澤
Takeshi Kutsuzawa
武 沓澤
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Japan Foundation Engineering Co Ltd
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Japan Foundation Engineering Co Ltd
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Abstract

To provide a repair structure of a sprayed slope frame and a repair method thereof capable of extending the life of the sprayed slope frame on which some changes have been found.SOLUTION: As a pressure-bearing member 21 bears an axial force acting on a lock-bolt 5 with each of leg parts 23 to 26 respectively extending along a vertical frame 2 and a lateral frame 3 across an intersection 4, the growth of a crack, or the expansion and the progress of damage generated in a sprayed slope frame 1 are suppressed to extend the life of the deteriorated sprayed slope frame 1.SELECTED DRAWING: Figure 2

Description

本発明は、法面に施工された吹付法枠の補修構造および補修方法に関する。   The present invention relates to a repair structure and a repair method for a spraying method frame constructed on a slope.

近年、高度成長期に施工されたコンクリートあるいはモルタル吹付法枠（以下「吹付法枠」と称する）の老朽化が深刻化しており、その対策が急がれている。ところで、既設モルタル面の変状においては、例えば、特許文献１等の補修に関する技術が開発されているが、吹付法枠の変状に関しては、有効な方策が確立されていないのが現状である。例えば、吹付法枠のクラック（ひび割れ）の補修については、当該クラックにエポキシ樹脂等の充填剤を充填させるのみであり、内部あるいは外部応力によるクラックの成長を止めることは困難である。一方、吹付法枠に剥離等の破損が生じた場合、鉄筋に支障を来していなくても、破損部分あるいは法枠全体の撤去を要することがあり、補修工事が大掛かりになることが問題であった。   In recent years, aging of concrete or mortar spraying frames (hereinafter referred to as “spraying method frames”) constructed in a high growth period has become serious, and countermeasures are urgently needed. By the way, in the modification of the existing mortar surface, for example, a technique related to the repair of Patent Document 1 has been developed, but no effective measures have been established for the modification of the spraying frame. . For example, for repairing cracks in the spraying method frame, it is only necessary to fill the cracks with a filler such as an epoxy resin, and it is difficult to stop the growth of cracks due to internal or external stress. On the other hand, if damage such as peeling occurs in the spraying frame, it may be necessary to remove the damaged part or the entire frame even if it does not interfere with the reinforcing bars, which makes repair work large. there were.

特開２００９−４１３３５号公報JP 2009-41335 A

そこで本発明は、上記事情に鑑みてなされたもので、変状がみられる吹付法枠を延命させることが可能な吹付法枠の補修構造および補修方法を提供することを課題としてなされたものである。   Then, this invention was made | formed in view of the said situation, and it was made as a subject to provide the repair structure and repair method of the spraying method frame which can prolong the life of the spraying method frame in which a deformation | transformation is seen. is there.

上記課題を解決するために、本発明の吹付法枠の補修構造は、格子状の吹付法枠の補修構造であって、前記吹付法枠の補修面に密着させる補強板を備え、前記補強板は、前記吹付法枠の交差部を跨いで枠に沿って延びることを特徴とする。   In order to solve the above-mentioned problems, the repair structure of a spraying method frame according to the present invention is a repair structure of a grid-like spraying method frame, and includes a reinforcing plate that is in close contact with the repair surface of the spraying method frame, Extends along the frame across the intersection of the spraying method frames.

上記課題を解決するために、本発明の吹付法枠の補修方法は、補修対象となる亀裂または破損箇所に充填剤を充填させる工程と、前記吹付法枠の交差部を跨いで枠に沿って延びるように補強板を前記吹付法枠の補修面に密着させる工程と、を含むことを特徴とする。   In order to solve the above-mentioned problem, the repair method of the spraying method frame of the present invention includes a step of filling a filler in a crack or a broken portion to be repaired, and a crossing portion of the spraying method frame along the frame. And a step of bringing the reinforcing plate into close contact with the repair surface of the spraying frame so as to extend.

本発明によれば、変状がみられる吹付法枠を延命させることができる。   According to the present invention, it is possible to extend the life of a spraying method frame in which deformation is observed.

補修前の吹付法枠の概念図である。It is a conceptual diagram of the spraying method frame before repair. 補修後の吹付法枠の概念図である。It is a conceptual diagram of the spraying method frame after repair. 本実施形態に係る補修構造の断面図である。It is sectional drawing of the repair structure which concerns on this embodiment.

本発明の一実施形態を添付した図を参照して説明する。
図１は、本実施形態の補修構造Ｒ２，Ｒ１（図２参照）が適用される吹付法枠１（補修前）の概念図である。ここで、吹付法枠１は、モルタル吹付法枠工により施工され、図１に示されるように、縦枠２と横枠３とが交差した格子状に形成される。なお、図１に示される吹付法枠１には、内部あるいは外部応力によるクラックＣ１−Ｃ６が生じている。また、吹付法枠１は、標準的な構造（断面形状、枠中心間隔、鉄筋の配置等）をなしている。よって、明細書の記載を簡潔にするため、当該吹付法枠１に関する詳細な説明を省略する。また、便宜的に、上下左右方向を図１に矢印で示されるように定める。 An embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a conceptual diagram of a spraying method frame 1 (before repair) to which the repair structures R2 and R1 (see FIG. 2) of the present embodiment are applied. Here, the spraying method frame 1 is constructed by a mortar spraying method frame work, and is formed in a lattice shape in which the vertical frame 2 and the horizontal frame 3 intersect as shown in FIG. In the spraying method frame 1 shown in FIG. 1, cracks C1-C6 due to internal or external stress are generated. The spraying method frame 1 has a standard structure (cross-sectional shape, frame center interval, rebar arrangement, etc.). Therefore, in order to simplify the description of the specification, a detailed description of the spraying method frame 1 is omitted. For convenience, the vertical and horizontal directions are defined as indicated by arrows in FIG.

図１に示されるように、クラックＣ１，Ｃ２は、吹付法枠１下部の縦枠２を横断し、さらに法面６（モルタル法面）を横枠３に沿って延びる。クラックＣ３は、ロックボルト５（補強材）が挿入されていない交差部４の表層を斜めに延びる。クラックＣ４は、ロックボルト５が挿入されていない交差部４の表層をＸ状に延びる。そして、クラックＣ５，Ｃ６は、法面６のロックボルト５側近の角部を起点に縦枠２および横枠３に沿って延びる。なお、吹付法枠１の鉄筋は、機能的に問題がないものとする。   As shown in FIG. 1, the cracks C <b> 1 and C <b> 2 cross the vertical frame 2 at the bottom of the spraying method frame 1 and further extend a slope 6 (mortar slope) along the horizontal frame 3. The crack C3 extends obliquely on the surface layer of the intersecting portion 4 where the lock bolt 5 (reinforcing material) is not inserted. The crack C4 extends in the X shape on the surface layer of the intersecting portion 4 where the lock bolt 5 is not inserted. The cracks C5 and C6 extend along the vertical frame 2 and the horizontal frame 3 starting from the corner of the slope 6 near the lock bolt 5 side. In addition, the reinforcing bar of the spraying method frame 1 shall have no functional problem.

図２は、本実施形態の補修構造Ｒ１，Ｒ２が適用された吹付法枠１（補修後）の概念図である。ここで、補修構造Ｒ１は、クラックＣ３−Ｃ４に適用され、補修構造Ｒ２は、クラックＣ１−Ｃ２、Ｃ５−Ｃ６に適用される。図２に示されるように、補修構造Ｒ１は、矩形の補強板３１により構成される。補強板３１は、ロックボルト５が挿入されていない交差部４を縦断して縦枠２に沿って延び、吹付法枠１の上面１Ａに接着により固着（密着）される。換言すると、補修構造Ｒ１は、クラックＣ３，Ｃ４を跨いで縦枠２に沿って延びる。なお、補強板３１には、補修構造Ｒ２の補強板１１と同じ材料、例えば、工業用プラスチック、炭素繊維強化プラスチック（ＣＦＲＰ）を含む繊維強化プラスチック（ＦＲＰ）、レジンコンクリート、鋼材等を材料とする板が用いられるが、当該材料をこれらに限定することを意図していない。   FIG. 2 is a conceptual diagram of a spraying method frame 1 (after repair) to which the repair structures R1 and R2 of the present embodiment are applied. Here, the repair structure R1 is applied to the cracks C3-C4, and the repair structure R2 is applied to the cracks C1-C2, C5-C6. As shown in FIG. 2, the repair structure R <b> 1 is configured by a rectangular reinforcing plate 31. The reinforcing plate 31 extends vertically along the vertical frame 2 through the intersecting portion 4 where the lock bolt 5 is not inserted, and is fixed (adhered) to the upper surface 1A of the spraying method frame 1 by adhesion. In other words, the repair structure R1 extends along the vertical frame 2 across the cracks C3 and C4. The reinforcing plate 31 is made of the same material as the reinforcing plate 11 of the repair structure R2, for example, industrial plastic, fiber reinforced plastic (FRP) including carbon fiber reinforced plastic (CFRP), resin concrete, steel material, or the like. Although plates are used, it is not intended to limit the material to these.

図２、図３に示されるように、補修構造Ｒ２は、大別して補強板１１と受圧部材２１とにより構成される。補強板１１は、平面視でクロス状に形成され、吹付法枠１の上面１Ａ（ロックボルト５の頭部５Ａが突出する側の面）に接着されて固着（密着）される。なお、補強板１１の材料には、工業用プラスチック、炭素繊維強化プラスチック等の板が用いられる。   As shown in FIGS. 2 and 3, the repair structure R <b> 2 is roughly composed of a reinforcing plate 11 and a pressure receiving member 21. The reinforcing plate 11 is formed in a cross shape in plan view, and is adhered and adhered (adhered) to the upper surface 1A of the spraying method frame 1 (the surface on the side from which the head 5A of the lock bolt 5 protrudes). The material of the reinforcing plate 11 is a plate made of industrial plastic, carbon fiber reinforced plastic, or the like.

補強板１１は、吹付法枠１の交差部４に配置される基部１２と、該基部１２から縦枠２および横枠３に沿って四方（上下左右）に延びる延出部１３−１６とを有している。延出部１３，１４は、幅が縦枠２の幅Ｗ２（図１参照）に対して同一あるいは僅かに狭く設定され、長さが吹付法枠１の縦方向の枠中心距離Ｌ２（図１参照）の１／３ないし１／２に設定される（図２の例示では１／３）。また、延出部１５，１６は、幅が横枠３の幅Ｗ３（図１参照）に対して同一あるいは僅かに狭く設定され、長さが吹付法枠１の横方向の枠中心距離Ｌ３（図１参照）の１／３ないし１／２に設定される（図２の例示では１／３）。なお、本実施形態では、Ｗ２=Ｗ３、かつＬ２=Ｌ３である。また、補強板１１の基部１２の中央には、ロックボルト５の頭部５Ａを挿通させるための孔１７が形成されている。   The reinforcing plate 11 includes a base 12 disposed at the intersecting portion 4 of the spraying method frame 1 and an extending portion 13-16 extending from the base 12 along the vertical frame 2 and the horizontal frame 3 in four directions (up, down, left and right). Have. The extending portions 13 and 14 are set to have the same or slightly narrower width than the width W2 (see FIG. 1) of the vertical frame 2, and the length is the frame center distance L2 in the vertical direction of the spraying method frame 1 (FIG. 1). (Refer to FIG. 2). In addition, the extending portions 15 and 16 are set to have the same or slightly narrower width than the width W3 (see FIG. 1) of the horizontal frame 3, and the length is set to the horizontal frame center distance L3 ( 1/3) (see FIG. 2) (1/3 in the example of FIG. 2). In this embodiment, W2 = W3 and L2 = L3. A hole 17 for inserting the head 5A of the lock bolt 5 is formed in the center of the base 12 of the reinforcing plate 11.

受圧部材２１は、補強板１１に対応させたクロス状に形成され、図２、図３に示されるように、補強板１１上に重ねて用いられる。受圧部材２１の材料には、例えば、ＳＳ４００等の機械構造用炭素鋼鋼材が用いられる。受圧部材２１は、補強板１１の基部１２に対応する基部２２、換言すると、補強板１１の基部１２上に配置される基部２２を有する。該基部２２には、補強板１１の基部１２の孔１７から突出したロックボルト５の頭部５Ａを挿通させるための軸孔２７が形成される。基部２２は、上面２２Ｂ、すなわち、受圧面２２Ａに対して反対側の面２２Ｂに形成された凹部２８を有する。該凹部２８は、底面から突出したロックボルト５の頭部５Ａに取り付けられたロックナット２９を収容するとともにロックボルト５に作用する軸力をロックナット２９を介して底面で受ける。なお、凹部２８は、ロックナット２９を締め付けるときに使用する工具に干渉しないように設計される。   The pressure receiving member 21 is formed in a cross shape corresponding to the reinforcing plate 11, and is used by being superimposed on the reinforcing plate 11 as shown in FIGS. 2 and 3. As a material of the pressure receiving member 21, for example, a carbon steel material for mechanical structure such as SS400 is used. The pressure receiving member 21 has a base portion 22 corresponding to the base portion 12 of the reinforcing plate 11, in other words, a base portion 22 disposed on the base portion 12 of the reinforcing plate 11. The base portion 22 is formed with a shaft hole 27 through which the head portion 5A of the lock bolt 5 protruding from the hole 17 of the base portion 12 of the reinforcing plate 11 is inserted. The base 22 has a recess 28 formed on the upper surface 22B, that is, the surface 22B opposite to the pressure receiving surface 22A. The recess 28 receives a lock nut 29 attached to the head 5A of the lock bolt 5 protruding from the bottom surface and receives an axial force acting on the lock bolt 5 on the bottom surface via the lock nut 29. The recess 28 is designed so as not to interfere with the tool used when the lock nut 29 is tightened.

また、受圧部材２１は、基部２２から側方へ延びて補強板１１の各延出部１３−１６上に配置される脚部２３−２６を有する。換言すると、脚部２３，２４は、縦枠２に沿って上下相反方向へ延び、脚部２５，２６は、横枠３に沿って左右相反方向へ延びる。各脚部２３−２６は、補強板１１の各延出部１３−１６に対向する受圧面２３Ａ−２６Ａと、基部２２の上面２２Ｂに連続するとともに先端に向かって下り勾配で延びる傾斜面２３Ｂ−２６Ｂとを有する。すなわち、各脚部２３−２６は、基端から先端に向かって高さが低くなる（厚さが減少する）楔状に形成される。   Further, the pressure receiving member 21 has leg portions 23-26 that extend laterally from the base portion 22 and are disposed on the respective extension portions 13-16 of the reinforcing plate 11. In other words, the leg portions 23 and 24 extend in the up and down direction along the vertical frame 2, and the leg portions 25 and 26 extend in the left and right direction along the horizontal frame 3. Each leg portion 23-26 is continuous with the pressure receiving surface 23A-26A facing each extending portion 13-16 of the reinforcing plate 11 and the upper surface 22B of the base portion 22 and is inclined surface 23B- extending downwardly toward the tip. 26B. That is, each leg part 23-26 is formed in the wedge shape from which a height becomes low (thickness decreases) toward a front-end | tip from a base end.

次に、本実施形態に係る吹付法枠１の補修方法を説明する。
最初に、補修構造Ｒ１を用いた吹付法枠１の補修方法を説明する。予め、対象となるクラックＣ３，Ｃ４には、エポキシ樹脂等の充填剤を充填しておく。まず、補修面（補修構造Ｒ１を施工する部位）をグラインダで研削する等して均す。次に、補修面をプライマ処理した後、対象となるクラックＣ３，Ｃ４（交差部４）を跨ぐようにして、当該補修面に補強板３１を接着剤により固着（密着）させる。 Next, the repair method of the spraying method frame 1 which concerns on this embodiment is demonstrated.
First, a repair method of the spraying method frame 1 using the repair structure R1 will be described. In advance, the target cracks C3 and C4 are filled with a filler such as an epoxy resin. First, the repair surface (the portion where the repair structure R1 is to be constructed) is leveled by grinding with a grinder. Next, after the repair surface is primed, the reinforcing plate 31 is fixed (adhered) to the repair surface with an adhesive so as to straddle the target cracks C3 and C4 (intersection 4).

次に、補修構造Ｒ２を用いた吹付法枠１の補修方法を説明する。予め、補修面（補修構造Ｒ２を施工する部位）から突出したロックボルト５の頭部５Ａに装着されているロックナット２９は取り外しておく。また、対象となるクラックＣ１，Ｃ２，Ｃ５，Ｃ６には、エポキシ樹脂等の充填剤を充填しておく。   Next, the repair method of the spraying method frame 1 using repair structure R2 is demonstrated. The lock nut 29 attached to the head 5A of the lock bolt 5 protruding from the repair surface (part where the repair structure R2 is to be constructed) is removed in advance. The target cracks C1, C2, C5 and C6 are filled with a filler such as an epoxy resin.

まず、補修面をグラインダで研削する等して均す。次に、補修面をプライマ処理した後、当該補修面に補強板１１を接着剤により固着（密着）させる。このとき、補修面から突出したロックボルト５の頭部５Ａに補強板１１の孔１７を挿通させ、当該補強板１１の基部１２を吹付法枠１の交差部４に固着させる。また、補強板１１の延出部１３，１４および延出部１５，１６を縦枠２および横枠３に固着させる。   First, level the repaired surface by grinding it with a grinder. Next, after the repair surface is primed, the reinforcing plate 11 is fixed (adhered) to the repair surface with an adhesive. At this time, the hole 17 of the reinforcing plate 11 is inserted into the head 5A of the lock bolt 5 protruding from the repair surface, and the base 12 of the reinforcing plate 11 is fixed to the intersecting portion 4 of the spraying method frame 1. Further, the extending portions 13 and 14 and the extending portions 15 and 16 of the reinforcing plate 11 are fixed to the vertical frame 2 and the horizontal frame 3.

次に、補強板１１が固着された補修面から突出したロックボルト５の頭部５Ａに受圧部材２１の軸孔２７を挿通させた後、当該ロックボルト５の頭部５Ａにロックナット２９を装着（仮締め）する。この状態で、受圧部材２１をロックボルト５を中心に回転させるようにして補強板１１に対して位置合わせし、受圧部材２１の各脚部２３−２６を補強板１１の各延出部１３−１６上に配置する。受圧部材２１の位置合わせ後、当該受圧部材２１の凹部２８から突出したロックボルト５の頭部５Ａにロックナット２９を装着し、該ロックナット２９をトルクレンチ等を用いて締め付ける。ロックナット２９の締め付け後、必要に応じて防錆処理を施す。   Next, after inserting the shaft hole 27 of the pressure receiving member 21 into the head 5A of the lock bolt 5 protruding from the repair surface to which the reinforcing plate 11 is fixed, the lock nut 29 is attached to the head 5A of the lock bolt 5 (Temporary tightening) In this state, the pressure receiving member 21 is rotated with the lock bolt 5 as a center so that the pressure receiving member 21 is aligned with the reinforcing plate 11, and the leg portions 23-26 of the pressure receiving member 21 are aligned with the extending portions 13-of the reinforcing plate 11. 16 is arranged. After positioning the pressure receiving member 21, a lock nut 29 is attached to the head 5A of the lock bolt 5 protruding from the recess 28 of the pressure receiving member 21, and the lock nut 29 is tightened using a torque wrench or the like. After tightening the lock nut 29, a rust prevention treatment is performed as necessary.

この実施形態では以下の効果を奏する。
本実施形態によれば、補修構造Ｒ１は、補修面の亀裂（クラックＣ３，Ｃ４）または破損箇所に樹脂等の充填剤を充填した後、当該補修面に亀裂または破損箇所を跨いで延びる補強板３１を固着（密着）させることで構成されるので、吹付法枠１に発生した亀裂の成長または破損の拡大および進行を抑制することが可能であり、老朽化した吹付法枠１を延命させることができる。また、亀裂または破損箇所に剥離が生じた場合、破片を補強板３１で保持することで当該破片の落下を防ぐことができる。 This embodiment has the following effects.
According to the present embodiment, the repair structure R1 includes a reinforcing plate that extends over the repaired surface after cracks (cracks C3, C4) or a filler such as resin are filled in the repaired surface. Since it is comprised by adhering (adhering) 31, it is possible to suppress the growth and progress of crack growth or breakage occurring in the spraying method frame 1, and prolong the life of the aging spraying method frame 1. Can do. Moreover, when peeling occurs in a crack or a damaged part, the falling of the broken piece can be prevented by holding the broken piece with the reinforcing plate 31.

本実施形態によれば、補修構造Ｒ２は、ロックボルト５の軸力により交差部４を跨いで延びる各脚部２３−２６（受圧部）を介して縦枠２および横枠３に押し付ける受圧部材２１を備える、換言すると、ロックボルト５に作用する軸力を、交差部４を跨いで縦枠２および横枠３に沿って延びる各脚部２３−２６で受ける受圧部材２１を備えるので、亀裂により分断された枠躯体を地山に押し付けることができる。よって、受圧部材２１を介して枠躯体の連続性が維持され、吹付法枠１に発生した亀裂（クラックＣ１，Ｃ２，Ｃ５，Ｃ６）の成長または破損の拡大および進行をより効果的に抑制することが可能であり、老朽化した吹付法枠１をより延命させることができる。   According to the present embodiment, the repair structure R2 is a pressure receiving member that is pressed against the vertical frame 2 and the horizontal frame 3 via the leg portions 23-26 (pressure receiving portions) that extend across the crossing portion 4 by the axial force of the lock bolt 5. 21, in other words, the pressure receiving member 21 that receives the axial force acting on the lock bolt 5 at each leg portion 23-26 extending along the vertical frame 2 and the horizontal frame 3 across the crossing portion 4. The frame frame divided by can be pressed against the natural ground. Therefore, the continuity of the frame housing is maintained through the pressure receiving member 21, and the growth or breakage of cracks (cracks C1, C2, C5, C6) generated in the spraying method frame 1 is more effectively suppressed. It is possible to extend the life of the aging spray frame 1 more.

また、受圧部材２１の各脚部２３−２６（受圧部）は、縦枠２および横枠３の交差部４から枠中心距離Ｌ２，Ｌ３の１／３ないし１／２までの範囲をカバーするので、当該受圧部材２１を介して枠躯体の連続性を維持することが可能であり、破損した吹付法枠１の表層崩壊抑止効果を回復することができる。これにより、吹付法枠１の全体あるいは一部を撤去することなく、補修での対応が可能であり、工期を大幅に短縮することができるとともに吹付法枠１の維持コストを大幅に削減することができる。   Further, each leg portion 23-26 (pressure receiving portion) of the pressure receiving member 21 covers a range from the intersecting portion 4 of the vertical frame 2 and the horizontal frame 3 to 1/3 to 1/2 of the frame center distances L2 and L3. Therefore, it is possible to maintain the continuity of the frame housing via the pressure receiving member 21, and it is possible to recover the surface layer collapse inhibiting effect of the damaged spraying method frame 1. As a result, repair can be performed without removing all or part of the spraying method frame 1, and the construction period can be greatly shortened and the maintenance cost of the spraying method frame 1 can be greatly reduced. Can do.

なお、実施形態は前述の形態に限定されるものではなく、例えば、次のように構成することができる。
本実施形態では、交差部４を跨いて縦枠２に沿って延びるように補強板３１を吹付法枠１に固着（密着）させて補修構造Ｒ１を構成したが、交差部４を跨いで横枠３に沿って延びるように補強板３１を吹付法枠１に固着（密着）させて補修構造Ｒ１を構成してもよい。しかしながら、周知のように、吹付法枠１における表層崩壊抑止力は縦枠２の強度に依存するので、補強板３１を縦枠２に沿って固着させるのが好ましい。 In addition, embodiment is not limited to the above-mentioned form, For example, it can comprise as follows.
In the present embodiment, the repair structure R1 is configured by fixing (adhering) the reinforcing plate 31 to the spraying method frame 1 so as to extend along the vertical frame 2 across the intersecting portion 4. The repair structure R1 may be configured by fixing (adhering) the reinforcing plate 31 to the spraying method frame 1 so as to extend along the frame 3. However, as is well known, the surface layer collapse inhibiting force in the spraying method frame 1 depends on the strength of the vertical frame 2, so that the reinforcing plate 31 is preferably fixed along the vertical frame 2.

本実施形態では、補強板１１および受圧部材２１からなる補修構造Ｒ２をクロス状に形成したが、補修構造Ｒ２をクロス状に限定することを意図するものでなく、補修構造Ｒ２は、Ｉ状あるいはＴ状等に形成することができる。換言すると、本実施形態では、補強板１１の延出部１３−１６および受圧部材２１の脚部２３−２６（受圧部）の数量を４個としたが、これらの数量は適宜選択することができる設計事項である。   In the present embodiment, the repair structure R2 composed of the reinforcing plate 11 and the pressure receiving member 21 is formed in a cross shape. However, the repair structure R2 is not intended to be limited to a cross shape. It can be formed in a T shape or the like. In other words, in the present embodiment, the number of the extending portions 13-16 of the reinforcing plate 11 and the number of leg portions 23-26 (pressure receiving portions) of the pressure receiving member 21 are four, but these numbers can be appropriately selected. This is a possible design item.

本実施形態では、受圧部材２１を単一部材で構成したが、基部２２と各脚部２３−２６（受圧部）とを別体で構成する、換言すると、基部２２と各脚部２３−２６（受圧部）との間に接合部を設け、例えばボルト等を用いて基部２２と各脚部２３−２６（受圧部）とを一体化させるように補修構造Ｒ２を構成することができる。
この場合、受圧部材２１は、基部２２と各脚部２３−２６（受圧部）とを位置調整機構を介して接合（連結）させることで、基部２２に対する各脚部２３−２６（受圧部）の取付位置（取付角度を含む）を調整可能に構成することができる。 In the present embodiment, the pressure receiving member 21 is configured as a single member, but the base portion 22 and each leg portion 23-26 (pressure receiving portion) are configured separately, in other words, the base portion 22 and each leg portion 23-26. The repair structure R2 can be configured such that a joint portion is provided between the pressure receiving portion and the base portion 22 and each leg portion 23-26 (pressure receiving portion), for example, using a bolt or the like.
In this case, the pressure receiving member 21 joins (connects) the base portion 22 and the leg portions 23-26 (pressure receiving portion) via the position adjusting mechanism, thereby causing the leg portions 23-26 (pressure receiving portion) to the base portion 22. The mounting position (including the mounting angle) can be adjusted.

本実施形態では、補修構造Ｒ２をロックボルト５が挿通された交差部４を含む補修面にのみに適用したが、ロックボルト５が挿通されていない交差部４を含む補修面に補修構造Ｒ２を適用する場合、当該交差部４に新規にロックボルト５を施工すればよい。
また、受圧部材２１の材料は、機械構造用炭素鋼鋼材の他、例えば鋳鉄を用いることができる。 In the present embodiment, the repair structure R2 is applied only to the repair surface including the intersecting portion 4 through which the lock bolt 5 is inserted. However, the repair structure R2 is applied to the repair surface including the intersecting portion 4 through which the lock bolt 5 is not inserted. When applying, the lock bolt 5 may be newly constructed at the intersection 4.
Moreover, the material of the pressure receiving member 21 can use cast iron other than the carbon steel material for mechanical structures, for example.

１ 吹付法枠、２ 縦枠、３ 横枠、４ 交差部、１１ 補強板 1 spraying frame, 2 vertical frame, 3 horizontal frame, 4 intersection, 11 reinforcing plate

Claims (6)

格子状の吹付法枠の補修構造であって、
前記吹付法枠の補修面に密着させる補強板を備え、
前記補強板は、前記吹付法枠の交差部を跨いで枠に沿って延びることを特徴とする吹付法枠の補修構造。 A repair structure of a grid-like spraying frame,
A reinforcing plate to be in close contact with the repair surface of the spraying frame;
The repair structure of a spraying method frame, wherein the reinforcing plate extends along the frame across an intersection of the spraying method frame. 前記補強板に重ねて配置される受圧部材を備え、
前記受圧部材は、前記交差部から前記枠に沿って延びる複数個の受圧部を有し、前記交差部に挿通されたロックボルトに作用する軸力を、前記補強板を介して前記枠上に配置された各受圧部で受けることを特徴とする請求項１に記載の吹付法枠の補修構造。 A pressure-receiving member disposed on the reinforcing plate,
The pressure receiving member has a plurality of pressure receiving portions extending from the intersecting portion along the frame, and an axial force acting on a lock bolt inserted into the intersecting portion is applied to the frame via the reinforcing plate. 2. The repair structure for a spraying method frame according to claim 1, wherein the structure is received by each of the arranged pressure receiving portions. 前記受圧部材の各受圧部は、前記枠の前記交差部から枠中心距離の１／３ないし１／２までの範囲をカバーすることを特徴とする請求項２に記載の吹付法枠の補修構造。 3. The spray frame repair structure according to claim 2, wherein each pressure receiving portion of the pressure receiving member covers a range from 1/3 to 1/2 of a frame center distance from the intersecting portion of the frame. . 前記補強板および前記受圧部材は、前記交差部で交差するクロス状に形成されることを特徴とする請求項２または３に記載の吹付法枠の補修構造。 The said reinforcement board and the said pressure receiving member are formed in the cross shape which cross | intersects at the said cross | intersection part, The repair structure of the spraying method frame of Claim 2 or 3 characterized by the above-mentioned. 請求項１−４に記載の補修構造を用いた吹付法枠の補修方法であって、
補修対象となる亀裂または破損箇所に充填剤を充填させる工程と、
前記吹付法枠の交差部を跨いで枠に沿って延びるように補強板を前記吹付法枠の補修面に密着させる工程と、
を含むことを特徴とする吹付法枠の補修方法。 It is a repair method of the spraying method frame using the repair structure of Claim 1-4,
Filling the cracked or broken part to be repaired with filler,
A step of bringing a reinforcing plate into close contact with the repair surface of the spraying method frame so as to extend along the frame across the intersection of the spraying method frame;
A method of repairing a spraying frame, characterized by comprising: 前記交差部に挿通されたロックボルトを受圧部材の軸孔に挿通させて前記受圧部材を前記補強板に重ねて配置させる工程と、
前記ロックボルトに装着させたロックナットを締め付ける工程と、
前記ロックボルトに作用する軸力を、前記補強板を介して前記枠上に配置させた前記受圧部材の各受圧部で受ける工程と、
を含むことを特徴とする請求項５に記載の吹付法枠の補修方法。 Inserting the lock bolt inserted into the intersecting portion into the shaft hole of the pressure receiving member and placing the pressure receiving member on the reinforcing plate; and
Tightening a lock nut attached to the lock bolt;
Receiving an axial force acting on the lock bolt at each pressure receiving portion of the pressure receiving member disposed on the frame via the reinforcing plate;
The repair method of the spraying method frame of Claim 5 characterized by the above-mentioned.
JP2017103743A 2017-05-25 2017-05-25 Repair structure of sprayed slope frame and repair method thereof Pending JP2018199905A (en)

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JPS58176319A (en) * 1982-04-09 1983-10-15 Okabe Co Ltd Construction of slope frame structure
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JPS63206521A (en) * 1987-02-23 1988-08-25 Nippon Steel Metal Prod Co Ltd Slope frame structure
JPH02108727A (en) * 1988-10-14 1990-04-20 Aoki Corp Method of repairing mortar sprayed normal surface
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