JP3774451B2 - Slab reinforcement method - Google Patents

Slab reinforcement method Download PDF

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JP3774451B2
JP3774451B2 JP2003299547A JP2003299547A JP3774451B2 JP 3774451 B2 JP3774451 B2 JP 3774451B2 JP 2003299547 A JP2003299547 A JP 2003299547A JP 2003299547 A JP2003299547 A JP 2003299547A JP 3774451 B2 JP3774451 B2 JP 3774451B2
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slab
steel plate
recess
reinforcing steel
adhesive
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JP2005068789A (en
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直木 水谷
実三郎 今宮
嘉一 浅原
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Takenaka Corp
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本発明は、例えば、建物の増改築等によって生じたスラブコンクリートのコールドジョイント、地震等によって生じたスラブコンクリートの亀裂など、強度上の弱点となる部位のスラブ肉厚内に補強鋼板を埋設して、弱点となる部位の両側のスラブを連結するようにしたスラブ補強工法に関するものである。 In the present invention, for example, a reinforced slab is embedded in a slab thickness of a portion that is a weak point in strength, such as a cold joint of slab concrete caused by extension or reconstruction of a building, a crack of slab concrete caused by an earthquake, etc. relates slab reinforcement construction method so as to connect the opposite sides of the slab portion which becomes a weak point.

特公昭６４−１１７６３号公報Japanese Examined Patent Publication No. 64-11763 特公平６−９４７３４号公報Japanese Examined Patent Publication No. 6-94734

スラブのコンクリート表面（スラブ下面）に補強鋼板を接着剤とアンカーボルトで貼り付けて、スラブを補強する技術は、上記の特許文献１、２によって知られている。これら
の従来例では、何れも、スラブの下面に補強鋼板を接着剤とアンカーボルト等で貼り付けるため、高所での上向きの作業となり、一旦、天井板を取り去って、スラブ下面にドリルでボルト孔を形成し、しかる後、重量物である補強鋼板を天井裏に持ち上げた状態で、アンカーボルトによる固定や接着剤の注入を行わねばならず、施工性が悪いという問題点がある。また、スラブ下に補強鋼板が露出しているため、これを隠蔽する天井板の施工が必要不可欠である。 A technique for reinforcing a slab by attaching a reinforcing steel plate to the concrete surface of the slab (lower surface of the slab) with an adhesive and an anchor bolt is known from Patent Documents 1 and 2 described above. In each of these conventional examples, a reinforcing steel plate is affixed to the lower surface of the slab with an adhesive and anchor bolts, so the work is upward at a high place, and once the ceiling plate is removed, a bolt is drilled on the lower surface of the slab. A hole is formed, and then a heavy steel reinforced steel plate is lifted on the back of the ceiling, and fixing with an anchor bolt or injection of an adhesive must be performed, resulting in poor workability. Moreover, since the reinforcing steel plate is exposed under the slab, it is indispensable to construct a ceiling plate that conceals it.

従って、スラブ上からの作業によってスラブの肉厚内に補強鋼板を埋設してスラブのせん断補強を行うこと、例えば、スラブ上面のコンクリートを所定深さにはつり取って、凹部を形成し、凹部内に補強鋼板を設置し、補強鋼板とその下方に位置するスラブ部分とを、それらを貫通するボルトと当該ボルトに螺合するナットで締め付け、しかる後、凹部を無収縮コンクリート等で埋め戻して、スラブ上面を平坦にするといったスラブ補強工法が、重量物である補強鋼板を天井裏に持ち上げた状態でスラブ下面に固定する作業が無くなる点でも、床面仕上げの面でも望ましいと言える。   Therefore, by embedding a reinforcing steel plate in the slab thickness by working from above the slab, shear reinforcement of the slab is carried out, for example, the concrete on the upper surface of the slab is suspended to a predetermined depth to form a recess, The steel plate and the slab part positioned below the steel plate are tightened with a bolt that penetrates them and a nut that is screwed to the bolt, and then the recess is backfilled with non-shrinkable concrete or the like. It can be said that the slab reinforcement method of flattening the slab upper surface is desirable in terms of floor finishing as well as eliminating the work of fixing the heavy steel reinforced steel plate to the bottom of the slab in the state where it is lifted to the ceiling.

ところで、上記のように、スラブの肉厚内に埋設する補強鋼板とその下方に位置するスラブ部分とを、それらを貫通するボルトとナットで締め付けて、スラブの補強を行う場合、補強対象であるスラブを挟む上，下階での同時施工（上階では床面での作業、下階では天井裏での作業）が必要とされている。   By the way, as mentioned above, when reinforcing the slab by tightening the reinforcing steel plate embedded in the thickness of the slab and the slab portion positioned below the steel plate with bolts and nuts penetrating them, it is a reinforcement target. Simultaneous construction on the upper and lower floors (work on the floor on the upper floor and work on the back of the ceiling on the lower floor) is required.

従って、既存建物のスラブを上記の補強工法によって補強する場合、百貨店などのように、各々のテナント毎に店舗の定期的な内装改修計画を持っている大規模店舗では、補強対象スラブの上，下階テナントの改修時期が合致しないケースが多いので、上，下階の同時施工は現実的には困難である。また、無理に、上，下階の何れか一方の店舗の改修時期に合わせてスラブの補強工事を実施すると、他方の店舗では、本来の定期的な内装改修と、スラブの補強工事に伴って必要となる改修工事の２回分の改修費用が必要になり、経済的ロスが発生する。   Therefore, when slabs of existing buildings are reinforced by the above-mentioned reinforcement method, large-scale stores such as department stores that have regular interior repair plans for each tenant, Since there are many cases where the repair dates of the lower floor tenants do not match, it is practically difficult to install the upper and lower floors simultaneously. In addition, if the slab reinforcement work is carried out in accordance with the repair timing of one of the upper and lower floor stores, the other store will be accompanied by the original regular interior repair and slab reinforcement work. Renovation costs for the required renovation work are required, resulting in an economic loss.

本発明は、上記の事柄に留意してなされたもので、その目的とするところは、既存のスラブの肉厚内に補強鋼板を埋設して、スラブのせん断補強（面内変形に対する補強）を行うにあたり、下階の改修計画とは関係なく、作業しやすい上階からの作業のみによって、容易かつ短工期に行うことができる施工性の良いスラブ補強工法を提供することにある。 The present invention has been made in consideration of the above matters. The purpose of the present invention is to embed a reinforcing steel plate in the wall thickness of an existing slab, and to provide shear reinforcement (reinforcement against in-plane deformation) of the slab. in making, regardless of the lower floor of the renovation project is to provide only by working from the work easy upper level, easy and workability good chair Love reinforcing construction method can be performed in a short construction period.

請求項１に記載のスラブ補強工法は、予め下面に複数本の鋼製軸体が立設された補強鋼板をスラブ上からの作業によってスラブの肉厚内に埋設してあるスラブの補強構造を実現するための方法であって、スラブ上面のコンクリートを所定深さにはつり取って、凹部を形成し、凹部の底面にスラブ下面まで達しない複数の縦穴を形成する工程と、縦穴に接着剤を注入する工程と、予め下面に複数本の鋼製軸体が立設された補強鋼板を凹部に、前記鋼製軸体が前記縦穴に挿入された状態に敷き込む工程と、前記凹部をセメント系固結性流動物で埋め戻す工程とを備えたことを特徴としている。 The slab reinforcing method according to claim 1 is a slab reinforcing structure in which a reinforced steel plate in which a plurality of steel shafts are erected on the lower surface in advance is embedded in the thickness of the slab by work from above the slab. It is a method for realizing the method, wherein the concrete on the upper surface of the slab is suspended to a predetermined depth to form a recess, and a plurality of vertical holes that do not reach the lower surface of the slab are formed on the bottom surface of the recess, and an adhesive is added to the vertical hole. A step of injecting, a step of laying a reinforcing steel plate in which a plurality of steel shafts are erected on the lower surface in advance in a recess, a state in which the steel shaft is inserted in the vertical hole, and the recess in a cement system And a step of backfilling with a caking fluid.

尚、請求項１に記載のスラブ補強工法において、前記補強鋼板を凹部に敷き込んだ後、予め当該補強鋼板に形成された貫通孔から補強鋼板と凹部の底面との隙間に接着剤を注入することは、補強鋼板と凹部底面との密着度を高める点で、好ましい。 In addition, in the slab reinforcing method according to claim 1 , after the reinforcing steel plate is laid in the concave portion, an adhesive is injected into a gap between the reinforcing steel plate and the bottom surface of the concave portion from a through hole previously formed in the reinforcing steel plate. This is preferable in terms of increasing the degree of adhesion between the reinforcing steel plate and the bottom of the recess.

補強鋼板の下面に立設する鋼製軸体としては、スタッドボルト、適当な長さに裁断された異形鉄筋や断面円形の棒鋼を補強鋼板２の下面に溶接したもの、頭付きボルトの頭部又は先端を補強鋼板の下面に溶接したもの、補強鋼板の下面にナットを溶接し、当該ナットにボルトをねじ込んだものなど、種々の具体的な構成を採用できる。セメント系固結性流動物としては、樹脂モルタル、無収縮コンクリート等を採用できる。   Steel shafts erected on the lower surface of the reinforcing steel plate include stud bolts, welded deformed reinforcing bars cut into appropriate lengths and circular steel bars with a cross-section on the lower surface of the reinforcing steel plate 2, heads of headed bolts Or various concrete structures, such as what welded a nut to the lower surface of a reinforcing steel plate, and screwed a bolt in the nut, can be adopted. Resin mortar, non-shrinkable concrete, etc. can be adopted as the cement-based caking fluid.

上記の構成によれば、予め下面に複数本の鋼製軸体が立設された補強鋼板をスラブ上からの作業によってスラブの肉厚内に埋設するので、既存のスラブの肉厚内に補強鋼板を埋設して、スラブのせん断補強を行うにあたり、下階の改修計画とは関係なく、作業しやすい上階からの作業のみによって、容易かつ短工期に施工できる。   According to the above configuration, the reinforcing steel plate, in which a plurality of steel shafts are erected on the lower surface in advance, is embedded in the thickness of the slab by work from the top of the slab. When embedding a steel plate and carrying out shear reinforcement of a slab, it can be constructed easily and in a short construction period only by work from the upper floor, which is easy to work, irrespective of the repair plan of the lower floor.

即ち、スラブ上面のコンクリートを所定深さにはつり取って、凹部を形成し、凹部の底面にスラブ下面まで達しない複数の縦穴を形成し、縦穴に接着剤を注入するので、高所で上向きにドリルを操作したり、上向き作業で接着剤を注入する場合に比して、作業が著しく容易であり、しかも、予め工場加工等によって、下面に複数本の鋼製軸体が立設された補強鋼板を用い、当該補強鋼板を、その鋼製軸体が接着剤を注入した縦穴に挿入された状態に敷き込むので、補強鋼板をボルト・ナットでスラブに締め付け固定する現場作業が省略されることになり、短工期に施工できるのである。また、補強鋼板の設置後、凹部をセメント系固結性流動物で埋め戻すので、スラブ上面が平坦となり、床仕上げに支障を来たすことがない。   That is, the concrete on the top surface of the slab is suspended to a predetermined depth, a recess is formed, a plurality of vertical holes that do not reach the bottom surface of the slab are formed on the bottom surface of the recess, and an adhesive is injected into the vertical hole, so Reinforcement in which multiple steel shafts are erected on the lower surface in advance by factory processing, etc., compared to the case of operating a drill or injecting adhesive in upward work Since the steel plate is laid in a state where the steel shaft is inserted into the vertical hole into which the adhesive has been injected, the work on the site where the reinforcing steel plate is fastened and fixed to the slab with bolts and nuts is omitted. Therefore, it can be constructed in a short construction period. Moreover, since a recessed part is backfilled with a cement-type caking fluid after installation of a reinforcing steel plate, the upper surface of the slab becomes flat and does not hinder floor finishing.

以下、本発明の実施形態を、図面を参照しながら説明するが、それによって本発明は限定されるものではない。   Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereby.

図１〜図３は、例えば複数の建物Ａ，Ｂ，Ｃ，Ｄを連結して一つの大規模店舗用建物とした場合の強度上の弱点となる部位、つまり、建物Ａ，Ｂ，Ｃ，Ｄの連結部に生じたスラブコンクリートのコールドジョイント（仮想線ａで示す）の両側のスラブ１を、スラブ１の肉厚内に埋設した補強鋼板２で連結したスラブの補強構造を示す。スラブ１に形成した凹部３はセメント系固結性流動物４で埋め戻されている。この例では、セメント系固結性流動物４として樹脂モルタルを用いているが、無収縮コンクリートで埋め戻してもよい。補強鋼板２の下面には、予め、工場加工等により複数本の鋼製軸体５が立設されている。各鋼製軸体５は、凹部３の底面を穿孔して形成された縦穴６挿入されており、縦穴６には、接着剤（例えばエポキシ系接着剤）７が注入されている。８ａはスラブ上筋、８ｂはスラブ下筋、９は梁、１０は天井板、１１は天井下地である。   FIGS. 1 to 3 show, for example, parts that become weak points in strength when a plurality of buildings A, B, C, and D are connected to form a large-scale store building, that is, buildings A, B, C, The slab reinforcement structure which connected the slab 1 of the both sides of the cold joint (indicated by the virtual line a) of the slab concrete produced in the connection part of D with the reinforcement steel plate 2 embed | buried in the thickness of the slab 1 is shown. The recess 3 formed in the slab 1 is backfilled with a cement-based caking fluid 4. In this example, resin mortar is used as the cement-based caking fluid 4, but it may be backfilled with non-shrinkable concrete. On the lower surface of the reinforcing steel plate 2, a plurality of steel shaft bodies 5 are erected in advance by factory processing or the like. Each steel shaft 5 is inserted into a vertical hole 6 formed by drilling the bottom surface of the recess 3, and an adhesive (for example, an epoxy-based adhesive) 7 is injected into the vertical hole 6. 8a is an upper slab line, 8b is a lower slab line, 9 is a beam, 10 is a ceiling board, and 11 is a ceiling base.

補強鋼板２としては、後述する他の実施形態のように、強度上の弱点となる部位の長さに対応する長尺物であってもよいが、この例では、１枚あたりの重量をできるだけ抑えて、現場への搬入作業や凹部３への設置作業を容易に行えるように、短辺が例えば３０センチ程度、長辺が例えば１８０センチ程度の矩形状に形成された複数枚の補強鋼板２を用いている。補強鋼板２の下面に立設する鋼製軸体５としては、スタッドボルト、適当な長さに裁断された異形鉄筋や断面円形の棒鋼を補強鋼板２の下面に溶接したもの、頭付きボルトの頭部又は先端を補強鋼板２の下面に溶接したもの、補強鋼板２を貫通して上下をナットで締め付けられたボルト（図６の円内に示した。）等であってもよいが、この例では、図４に示すように、補強鋼板２の下面にナット５ａを溶接し、当該ナット５ａにボルト３ｂをねじ込んで、前記鋼製軸体５を構成している。２ａは、予め工場加工等により補強鋼板２の所々に形成された複数個の貫通孔である。   The reinforcing steel plate 2 may be a long object corresponding to the length of a weak point in strength as in other embodiments described later, but in this example, the weight per sheet can be as much as possible. A plurality of reinforcing steel plates 2 formed into a rectangular shape with a short side of about 30 cm and a long side of about 180 cm, for example, so that the work can be carried into the site and installed in the recess 3 easily. Is used. As the steel shaft body 5 standing on the lower surface of the reinforcing steel plate 2, a stud bolt, a deformed reinforcing bar cut into an appropriate length or a steel bar having a circular cross section is welded to the lower surface of the reinforcing steel plate 2, and a headed bolt is used. The head or the tip may be welded to the lower surface of the reinforcing steel plate 2, or a bolt (shown in the circle in FIG. 6) that penetrates the reinforcing steel plate 2 and is tightened with a nut on the top and bottom. In the example, as shown in FIG. 4, a nut 5 a is welded to the lower surface of the reinforcing steel plate 2, and a bolt 3 b is screwed into the nut 5 a to constitute the steel shaft body 5. Reference numeral 2a denotes a plurality of through holes formed in advance on the reinforcing steel plate 2 by factory processing or the like.

次に、図１〜図３で示したスラブの補強構造を実現するスラブ補強工法について説明す
る。先ず、ロールカンナ等を使用して、図５の（Ａ）に示すように、スラブ１上面のコンクリートＣを所定深さに（例えば、スラブ上筋８ａの上端まで）はつり取って、凹部３を形成し、凹部３の底面をドリルで穿孔して、スラブ１下面まで達しない複数の縦穴６を形成する。 Next, a slab reinforcement method for realizing the slab reinforcement structure shown in FIGS. 1 to 3 will be described. First, as shown in FIG. 5 (A), using a roll can etc., the concrete C on the upper surface of the slab 1 is suspended to a predetermined depth (for example, up to the upper end of the slab upper bar 8a), and the recess 3 is formed. Then, the bottom surface of the concave portion 3 is drilled with a drill to form a plurality of vertical holes 6 that do not reach the lower surface of the slab 1.

しかる後、図５の（Ｂ）に示すように、前記縦穴６にエポキシ系接着剤等の接着剤７を注入する。   Thereafter, as shown in FIG. 5B, an adhesive 7 such as an epoxy adhesive is injected into the vertical hole 6.

前記接着剤７が未だ固まらない間に、図６の（Ａ）、（Ｂ）に示すように、前記補強鋼板２を、凹部３に、前記鋼製軸体５が前記縦穴６に挿入された状態に敷き込む。   While the adhesive 7 has not yet hardened, as shown in FIGS. 6A and 6B, the reinforcing steel plate 2 is inserted into the recess 3 and the steel shaft body 5 is inserted into the vertical hole 6. Lay in the state.

この状態で、図７の（Ａ）に示すように、補強鋼板２に形成された何れかの貫通孔２ａから補強鋼板２と凹部３の底面との隙間にエポキシ系接着剤等の接着剤７を注入して、補強鋼板２とスラブ１コンクリートＣとを接着する。   In this state, as shown in FIG. 7A, an adhesive 7 such as an epoxy-based adhesive is inserted into the gap between the reinforcing steel plate 2 and the bottom surface of the recess 3 from any through hole 2a formed in the reinforcing steel plate 2. The reinforced steel plate 2 and the slab 1 concrete C are bonded.

そして、接着剤７の硬化後、図７の（Ｂ）に示すように、前記凹部３を樹脂モルタル等のセメント系固結性流動物４で埋め戻して、元の状態に復旧するのである。   Then, after the adhesive 7 is cured, as shown in FIG. 7B, the concave portion 3 is backfilled with a cement-based caking fluid 4 such as resin mortar to restore the original state.

上記の構成によれば、予め下面に複数本の鋼製軸体５が立設された補強鋼板２をスラブ１上からの作業によってスラブ１の肉厚内に埋設するので、既存のスラブ１の肉厚内に補強鋼板を埋設して、スラブのせん断補強を行うにあたり、下階の改修計画とは関係なく、作業しやすい上階からの作業のみによって、容易かつ短工期に施工できる。   According to the above configuration, the reinforcing steel plate 2 in which a plurality of steel shafts 5 are erected on the lower surface in advance is embedded in the thickness of the slab 1 by work from above the slab 1, so that the existing slab 1 When reinforced slabs are embeded in the wall thickness and slabs are shear-reinforced, they can be constructed easily and in a short construction period, only by work from the upper floor, which is easy to work, regardless of the repair plan for the lower floor.

即ち、スラブ１上面のコンクリートＣを所定深さにはつり取って、凹部３を形成し、凹部３の底面にスラブ下面まで達しない複数の縦穴６を形成し、縦穴６に接着剤７を注入するので、高所で上向きにドリルを操作したり、上向き作業で接着剤を注入する場合に比して、作業が著しく容易である。   That is, the concrete C on the upper surface of the slab 1 is suspended to a predetermined depth, the recess 3 is formed, a plurality of vertical holes 6 that do not reach the lower surface of the slab are formed on the bottom surface of the recess 3, and the adhesive 7 is injected into the vertical holes 6. Therefore, the operation is remarkably easy as compared with the case where the drill is operated upward at a high place or the adhesive is injected in the upward operation.

しかも、予め工場加工等によって、下面に複数本の鋼製軸体５が立設された補強鋼板２を用い、当該補強鋼板２を、その鋼製軸体５が接着剤７を注入した縦穴６に挿入された状態に敷き込むので、補強鋼板２をボルト・ナットでスラブに締め付け固定する現場作業が省略されることになり、施工性が良く、短工期で施工できる。また、補強鋼板２の設置後、凹部６をセメント系固結性流動物４で埋め戻すので、スラブ上面が平坦となり、床仕上げに支障を来たすことがない。   In addition, the reinforcing steel plate 2 in which a plurality of steel shaft bodies 5 are erected on the lower surface by factory processing or the like in advance is used, and the reinforcing steel plate 2 is a vertical hole 6 into which the steel shaft body 5 has injected the adhesive 7. Since it is laid in the state inserted into the slab, the field work of tightening and fixing the reinforcing steel plate 2 to the slab with bolts and nuts is omitted, so that workability is good and construction can be performed in a short construction period. Moreover, since the recessed part 6 is backfilled with the cement-type caking fluid 4 after installation of the reinforcing steel plate 2, the upper surface of the slab becomes flat and does not hinder floor finishing.

本発明は、図８に示すように、既存の建物Ａに隣接して、別の建物Ｂを、それらのスラブが連結された状態に建築して、大きな床面積を持つ一つの建物とする場合の、既存のスラブと新築スラブとの連結部（コールドジョイントａ）の補強に適用でき、図９に示すように、地震等によって亀裂ｂが生じたスラブコンクリートの補強にも適用できる。図８、図９では、何れも、補強鋼板２が強度上の弱点となる部位（コールドジョイントａや亀裂ｂ）の長手方向に長い長尺物に形成されているが、図１、図２で示した実施形態と同じように、コールドジョイントａや亀裂ｂの長手方向を短辺とし、コールドジョイントａや亀裂ｂと直角方向を長辺とする矩形状の補強鋼板２を使用してもよい。   In the present invention, as shown in FIG. 8, when another building B is constructed adjacent to an existing building A in a state in which those slabs are connected to form one building having a large floor area. The present invention can be applied to the reinforcement of the connecting portion (cold joint a) between the existing slab and the new slab, and as shown in FIG. 9, it can also be applied to the reinforcement of slab concrete in which a crack b has occurred due to an earthquake or the like. 8 and 9, the reinforcing steel plate 2 is formed in a long object in the longitudinal direction of a portion (cold joint a or crack b) that is a weak point in strength, but in FIGS. 1 and 2, Similarly to the illustrated embodiment, a rectangular reinforcing steel plate 2 having a long side in the longitudinal direction of the cold joint a or crack b and a long side in a direction perpendicular to the cold joint a or crack b may be used.

スラブの補強構造の一例を説明する概略平面図である。 Scan is a schematic plan view illustrating an example of a reinforcement structure of love. 要部の拡大平面図である。It is an enlarged plan view of the principal part. スラブの補強構造の縦断側面図である。It is a vertical side view of the reinforcement structure of a slab. 補強鋼板の一例を示す斜視図である。It is a perspective view which shows an example of a reinforced steel plate. 本発明に係るスラブ補強工法の工程を説明する縦断側面図である。It is a vertical side view explaining the process of the slab reinforcement construction method which concerns on this invention. 上記スラブ補強工法の工程を説明する縦断側面図である。It is a vertical side view explaining the process of the said slab reinforcement construction method. 上記スラブ補強工法の工程を説明する縦断側面図である。It is a vertical side view explaining the process of the said slab reinforcement construction method. 本発明に係るスラブ補強工法の適用対象を例示する概略平面図である。The present invention is a schematic plan view illustrating the application of the engaging Angeles Love reinforcing method. 本発明に係るスラブ補強工法の適用対象を例示する概略平面図である。The present invention is a schematic plan view illustrating the application of the engaging Angeles Love reinforcing method.

符号の説明Explanation of symbols

１ スラブ
２ 補強鋼板
２ａ 貫通孔
３ 凹部
４ セメント系固結性流動物
５ 鋼製軸体
６ 縦穴
７ 接着剤 1 Slab
2 Reinforced steel sheet
2a Through hole
3 recess
4 Cement-based caking fluid
5 Steel shaft
6 vertical holes
7 Adhesive

Claims (2)

スラブ上面のコンクリートを所定深さにはつり取って、凹部を形成し、凹部の底面にスラブ下面まで達しない複数の縦穴を形成する工程と、縦穴に接着剤を注入する工程と、予め下面に複数本の鋼製軸体が立設された補強鋼板を凹部に、前記鋼製軸体が前記縦穴に挿入された状態に敷き込む工程と、前記凹部をセメント系固結性流動物で埋め戻す工程とを備えたことを特徴とするスラブ補強工法。 The concrete on the upper surface of the slab is suspended to a predetermined depth, a recess is formed, a plurality of vertical holes not reaching the lower surface of the slab are formed on the bottom surface of the recess, a step of injecting an adhesive into the vertical hole, and a plurality of in advance on the lower surface A step of laying a reinforcing steel plate in which a steel shaft body is erected in a recess, and a state in which the steel shaft body is inserted into the vertical hole, and a step of filling the recess with a cement-based caking fluid A slab reinforcement method characterized by comprising 請求項１に記載のスラブ補強工法において、前記補強鋼板を凹部に敷き込んだ後、予め当該補強鋼板に形成された貫通孔から補強鋼板と凹部の底面との隙間に接着剤を注入することを特徴とするスラブ補強工法。

 In the slab reinforcement method according to claim 1, after the reinforcing steel plate is laid in the recess, an adhesive is injected into the gap between the reinforcing steel plate and the bottom surface of the recess from a through hole previously formed in the reinforcing steel plate. Characteristic slab reinforcement method.

JP2003299547A 2003-08-25 2003-08-25 Slab reinforcement method Expired - Fee Related JP3774451B2 (en)

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