JPS62260969A - Method for repairing and reinforcing concrete floor panel - Google Patents
Method for repairing and reinforcing concrete floor panelInfo
- Publication number
- JPS62260969A JPS62260969A JP10378086A JP10378086A JPS62260969A JP S62260969 A JPS62260969 A JP S62260969A JP 10378086 A JP10378086 A JP 10378086A JP 10378086 A JP10378086 A JP 10378086A JP S62260969 A JPS62260969 A JP S62260969A
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- reinforcing
- slab
- load
- concrete slab
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004567 concrete Substances 0.000 title claims description 71
- 230000003014 reinforcing effect Effects 0.000 title claims description 24
- 238000000034 method Methods 0.000 title claims description 11
- 239000000853 adhesive Substances 0.000 claims description 11
- 230000001070 adhesive effect Effects 0.000 claims description 11
- 239000011372 high-strength concrete Substances 0.000 claims description 2
- 239000012783 reinforcing fiber Substances 0.000 claims 1
- 230000002787 reinforcement Effects 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000007767 bonding agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000077 insect repellent Substances 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Bridges Or Land Bridges (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は橋梁や高架道路その他の構築物のコンクリート
床版のクラックを補強するとともにこれを更に補強する
コンクリート床版の補修補強方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for repairing and reinforcing concrete slabs of bridges, elevated roads, and other structures for reinforcing cracks and further reinforcing the concrete slabs.
（従来の技術）
従来クランクが生じたコンクリート床版等のコンクリー
ト構築物の補修としては、そのクラック内に合成樹脂系
の接着剤を注入する方法がとられ ′ており、またコン
クリート構造物の強度を高める補強としては、通常、新
たにコンクリート層を表面に被着させる方法が考えられ
る。(Prior art) Conventionally, the method of repairing concrete structures such as concrete deck slabs where cracks have occurred is to inject synthetic resin adhesive into the cracks. In order to increase the reinforcement, a method that can be considered is usually to apply a new layer of concrete to the surface.
（発明が解決しようとする問題点）
上述した従来の補修は、クラックが小さい場合、その深
部に至るまで接着剤を注入するのが困難であり、またコ
ンクリート層の？１１１！？による？ｉｌｌに際しても
、新たなコンクリート層にクラックが生じ易く、充分な
補強が困難である等の同題があった。(Problems to be Solved by the Invention) In the conventional repair described above, when the crack is small, it is difficult to inject adhesive to the deep part of the crack, and it is difficult to inject adhesive into the concrete layer. 111! ? by? The same problem occurred during the Ill construction, such as the new concrete layer being prone to cracking and making it difficult to provide sufficient reinforcement.
本発明は従来行われていなかった補蚊と補強合同箇所に
施すとともに、補修に際しての接着剤のクラック深部へ
の注入が容易に行われ、しかも被ηした補強用のコンク
リ−ニ一層にまり増厚を小さくしてしかもクラックの生
じない高強度のものとなりことができるコンクリート床
版の補修補強方法の提供を目的としたものである。The present invention can be applied to areas where mosquito repellent and reinforcement are jointed, which has not been done in the past, and the adhesive can be easily injected into the deep part of the crack during repair. The object of the present invention is to provide a method for repairing and reinforcing concrete slabs, which can reduce the thickness and yet provide high strength without cracking.
（問題点を解決するだめの手段）
上述の如き問題を解決し、所期の目的を達成するための
本発明の要旨とする構成は既設のコンクリ−１・床版上
に、該コンクリ−・１・床版の設ｇ１荷重より大きい荷
重を載荷して該コンクリート・床版を下面側が伸長され
る方向に撓ませ、イの撓んだコンクリート床版の下面よ
り該コンクリート・床版に生じているクラック内に接調
剤を注入した後、そのコンクリート床版下面に補強用の
コンクリート層を一体に被着させ、該コンクリート層の
硬化後前記コンクリート床版上の荷重を除去することを
特徴としてなるコンクリート床版の補修補強方法に存す
る。(Means for Solving the Problems) The gist of the present invention for solving the above-mentioned problems and achieving the intended purpose is to install the concrete slabs on the existing concrete slabs. 1. Setting up the floor slab A load larger than g1 load is applied to bend the concrete/floor slab in the direction in which the lower surface side is extended, and a load is applied to the concrete/floor slab from the lower surface of the bent concrete slab in (A). After a cementing agent is injected into the crack, a reinforcing concrete layer is integrally applied to the lower surface of the concrete slab, and after the concrete layer hardens, the load on the concrete slab is removed. It consists in a method for repairing and reinforcing concrete slabs.
（作用）
このコンクリート床版の補修補強方法は、既設のコンク
リート床版上にコンクリート床版の設計荷重より大きい
荷重を載荷することにより、床版は通常の状態より大ぎ
く撓み、クランクがある場合には下面側のクラックの開
口部分が大きく拡げられ、接省剤の注入がスムーズにな
り、深部にまで注入されることとなる。(Function) This method of repairing and reinforcing concrete slabs involves placing a load greater than the design load of the concrete slab on the existing concrete slab, causing the slab to flex more than its normal state, and if there is a crank. In this case, the opening of the crack on the lower surface side is widened, and the contact agent can be injected smoothly and into the deep part.
また、下側を伸長させる方向に撓ませた状態で下面に補
強用のコンクリ−１・石を一体に被着させ、コンクリー
トの硬化後に荷重を除去することにより、補強用のコン
クリート層が圧縮され、設計荷重以内の荷重がかかった
通常の状態では、補強用のコンクリート層は常にプレス
トレスが付与された状態となる。In addition, the reinforcing concrete layer is compressed by applying concrete 1 and stone for reinforcement to the lower surface while the lower side is bent in the direction of extension, and removing the load after the concrete hardens. Under normal conditions where a load within the design load is applied, the reinforcing concrete layer is always prestressed.
（丈施例）
次に本発明を高架道路のコンクリート床版に実施した例
を図面について説明する。(Length Example) Next, an example in which the present invention is applied to a concrete slab of an elevated road will be described with reference to the drawings.
図中１は、鋼製の桁であり、２は桁上に支持された既設
のコンクリート床版２である。このコンクリート床Ｎｉ
２に対し下面よりクラックの補修を・行うとともに補強
するものであり、まず第１図に示１ようにコンクリート
床版２の上面に設計輪荷重より梢大きい輪筒ｍＷを１−
ラック３を使用して載荷する。この設計輪荷重は、設計
時に上面を通交する車両の重湯を想定した荷重であり、
通常の通交状態ではこの設計輪荷重以上の輪荷重はかか
ることがない。In the figure, 1 is a steel girder, and 2 is an existing concrete slab 2 supported on the girder. This concrete floor Ni
2, cracks are repaired and reinforced from the bottom surface. First, as shown in Fig. 1, a wheel cylinder mW larger than the design wheel load is placed on the upper surface of the concrete slab 2.
Load using rack 3. This design wheel load is a load that assumes a heavy vehicle passing over the top surface at the time of design.
Under normal traffic conditions, a wheel load greater than this design wheel load is never applied.
またこの荷ｍＷはコンクリート床版２の下面側が伸長さ
れる方向に湾曲するように桁１の中１」位置でしかも図
示してないが桁１の支持部（例えば橋脚）の中間位置に
載荷する。In addition, this load mW is loaded at the middle position of the girder 1 so that the lower surface side of the concrete slab 2 is curved in the direction of extension, and also at the middle position of the support part (for example, a bridge pier) of the girder 1, although it is not shown in the figure. .
このようにして荷重Ｗを載荷した状態で第２図に示寸よ
・うにコンクリート床ｒＪｉ２の下面に生じているクラ
ック４に接五剤を充填する。接着〃１にはエポキシ樹脂
あるいは粘性の低いポリマー等の樹脂製接着剤を使用す
る。また接着剤の注入には１（１えばクラック４の開口
部分をマスキングするとともに注入筒５をクランク４内
に連通させて埋設し、この注入筒５を通してクラック４
内に圧入する。With the load W being applied in this manner, the crack 4 that has occurred on the lower surface of the concrete floor rJi2 is filled with a bonding agent as shown in FIG. For adhesion 1, a resin adhesive such as epoxy resin or a low viscosity polymer is used. In addition, to inject the adhesive, 1 (for example, masking the opening of the crack 4, and embedding the injection tube 5 in communication with the crank 4, passing the injection tube 5 through the crack 4)
Press fit inside.
接着剤の注入後コンクリート床版２の下面に補強用のコ
ンクリート層を被着させる。このコンクリート層６の被
着は、第３図に示すようにまず前述の接着剤の注入と平
行して又は注入後にコンクリート床版２の下面にアンカ
ー７を打設する。このアン）Ｊ−７は、埋込側端部をコ
ンクリート床版２内の鉄筋と一体化させることが好まし
い。このアンカー７に対し、鉄筋メツシュ８を支持させ
てコンクリート床版２の下面を覆うように張設する。After pouring the adhesive, a reinforcing concrete layer is applied to the lower surface of the concrete slab 2. To apply this concrete layer 6, as shown in FIG. 3, anchors 7 are first driven into the lower surface of the concrete slab 2 in parallel with or after the injection of the adhesive described above. It is preferable that the embedding side end of this J-7 is integrated with the reinforcing bars in the concrete slab 2. A reinforcing bar mesh 8 is supported by the anchor 7 and stretched so as to cover the lower surface of the concrete slab 2.
その後、第４図に示すように鉄筋メツシュ８を内部に埋
め込むようにコンクリート層６を吹き付けによって打設
する。このコンクリート層６の形成に使用するコンクリ
ートは、鋼繊維を混入させた高強度のものを使用し、必
要に応じて急結剤を混入した急結性のものを使用する。Thereafter, as shown in FIG. 4, a concrete layer 6 is poured by spraying so as to embed the reinforcing bar mesh 8 inside. The concrete used to form the concrete layer 6 is a high-strength concrete mixed with steel fibers, and if necessary, a quick-setting concrete mixed with a quick-setting agent.
これを吹き付は礪９をもって吹き付けてコンクリート層
６を形成する。なお、工期の短縮を要しない場合は必ず
しも急結性のものとする必要がない。This is sprayed using a groove 9 to form a concrete layer 6. In addition, if there is no need to shorten the construction period, it is not necessarily necessary to set the construction quickly.
その後、コンクリート層６が硬化し、所定の強度の発現
を侍ってコンクリート床版２の上面の荷ｍＷを除去し、
工事を完了する。この荷重Ｗの除去によって下側が伸長
する方向に湾曲されていたコンクリート床版２が元の水
平な状態に戻るため補強用のコンクリート層６が圧縮さ
れてプレストレスが付与された状態となる。また、この
プレストレスは、通常の輪荷重より大きい荷重Ｗをかけ
これを除くことによる復元力によって付与されるため通
常の輪筒■がかかった程度ではプレストレスが解除され
ない。After that, the concrete layer 6 hardens and the load (mW) on the top surface of the concrete slab 2 is removed after the concrete layer 6 hardens and develops a predetermined strength.
Complete construction. By removing this load W, the concrete slab 2, which had been curved in the direction in which the lower side is extended, returns to its original horizontal state, so that the reinforcing concrete layer 6 is compressed and prestressed. Further, since this prestress is applied by the restoring force caused by applying and removing a load W that is larger than the normal wheel load, the prestress will not be released to the extent that the normal wheel cylinder ■ is applied.
（発明の効果）
本発明のコンクリート床版補強方法は上述の如く構成さ
れ、既設のコンクリート床版上に設計荷重より大きい荷
重を載荷してコンクリート床版の下面が伸長する方向に
湾曲させこの状態でクラック内に接着剤を注入するため
、容易に深部にまで接着剤の注入ができ、補修の程度が
より完全に近くなり、更に湾曲させた状態で下面に補強
用のコンクリート層を一体に被着させるため、荷重の除
去後はそのコンクリート層が圧縮されてプレストレスが
付与された状態となり、しかも湾曲させるために載荷し
た荷重は通常の使用に際して予想される設計荷重より大
きいため、補強後において通常の状態では常に補強用の
コンクリート層にはプレストレスが付与された状態とな
ってクラックが生じ難り、耐久性に富み、しかも薄いコ
ンクリート留て大きな補強ができる。(Effects of the Invention) The concrete deck reinforcing method of the present invention is configured as described above, in which a load larger than the design load is applied to the existing concrete deck, and the lower surface of the concrete deck is curved in the direction of extension. Since the adhesive is injected into the crack, the adhesive can be easily injected deep into the crack, making the repair more complete. After the load is removed, the concrete layer is compressed and prestressed, and the load applied to bend it is higher than the expected design load for normal use, so after reinforcement Under normal conditions, the reinforcing concrete layer is always under prestress, making it difficult for cracks to occur, making it highly durable, and allowing for greater reinforcement with thin concrete.
図面は本発明の実施の一例を示すもので第１図〜第４因
はそれぞれ別々の施工途中の状態を示す断面図である。
Ｗ・・・荷重、２・・・コンクリート−床版、４・・・
クランク、６・・・コンクリート層、７・・・アンカー
、８・・・鉄筋メツシュ。
特 許 出 願 人 新構造技術株式会社第１図
第２図
第３図The drawings show an example of the implementation of the present invention, and FIGS. 1 to 4 are sectional views showing different states during construction. W...Load, 2...Concrete-floor slab, 4...
Crank, 6... Concrete layer, 7... Anchor, 8... Reinforcement mesh. Patent Applicant: New Construction Technology Co., Ltd. Figure 1 Figure 2 Figure 3
Claims (2)
版の設計荷重より大きい荷重を載荷して該コンクリート
床版を下面側が伸長される方向に撓ませ、その撓んだコ
ンクリート床版の下面より該コンクリート床版に生じて
いるクラック内に接着剤を注入した後、そのコンクリー
ト床版下面に補強用のコンクリート層を一体に被着させ
、該コンクリート層の硬化後前記コンクリート床版上の
荷重を除去することを特徴としてなるコンクリート床版
の補修補強方法。(1) A load larger than the design load of the concrete slab is applied onto the existing concrete slab, the concrete slab is bent in the direction in which the lower side is extended, and the lower surface of the bent concrete slab is After injecting adhesive into the cracks that have occurred in the concrete slab, a reinforcing concrete layer is integrally applied to the underside of the concrete slab, and after the concrete layer has hardened, the load on the concrete slab is reduced. A method for repairing and reinforcing concrete slabs, which is characterized by removal.
、前記コンクリート床版下面に支持させて鉄筋メッシュ
を張設し、該鉄筋メッシュを埋込むように補強用繊維を
混入した高強度コンクリートを吹き付けることにより被
着させる特許請求の範囲第１項記載のコンクリート床版
の補修補強方法。(2) For the reinforcing concrete layer on the underside of the concrete slab, a reinforcing mesh is stretched to support the underside of the concrete slab, and high-strength concrete mixed with reinforcing fibers is sprayed to embed the reinforcing mesh. A method for repairing and reinforcing a concrete floor slab according to claim 1, wherein the concrete floor slab is coated by a method of repairing and reinforcing a concrete slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10378086A JPS62260969A (en) | 1986-05-08 | 1986-05-08 | Method for repairing and reinforcing concrete floor panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10378086A JPS62260969A (en) | 1986-05-08 | 1986-05-08 | Method for repairing and reinforcing concrete floor panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62260969A true JPS62260969A (en) | 1987-11-13 |
| JPH0364030B2 JPH0364030B2 (en) | 1991-10-03 |
Family
ID=14362930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10378086A Granted JPS62260969A (en) | 1986-05-08 | 1986-05-08 | Method for repairing and reinforcing concrete floor panel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62260969A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0452158U (en) * | 1990-09-10 | 1992-05-01 | ||
| JP2002302909A (en) * | 2001-04-10 | 2002-10-18 | Yokogawa Koji Kk | Floor slab installation method in continuous beam bridge |
| JP2006194025A (en) * | 2005-01-17 | 2006-07-27 | Ps Mitsubishi Construction Co Ltd | Reinforcing method for existing bridge girder |
| JP2007270600A (en) * | 2006-03-08 | 2007-10-18 | Ps Mitsubishi Construction Co Ltd | Prestress introducing method to filling part between precast concrete members |
| JP2008133612A (en) * | 2006-11-27 | 2008-06-12 | Sumitomo Osaka Cement Co Ltd | Repairing method for prestressed concrete structure |
| JP2011149274A (en) * | 2011-03-29 | 2011-08-04 | Sumitomo Osaka Cement Co Ltd | Construction method for repairing prestressed concrete structure |
-
1986
- 1986-05-08 JP JP10378086A patent/JPS62260969A/en active Granted
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0452158U (en) * | 1990-09-10 | 1992-05-01 | ||
| JP2002302909A (en) * | 2001-04-10 | 2002-10-18 | Yokogawa Koji Kk | Floor slab installation method in continuous beam bridge |
| JP2006194025A (en) * | 2005-01-17 | 2006-07-27 | Ps Mitsubishi Construction Co Ltd | Reinforcing method for existing bridge girder |
| JP4512896B2 (en) * | 2005-01-17 | 2010-07-28 | 株式会社ピーエス三菱 | Reinforcement method of existing bridge girder |
| JP2007270600A (en) * | 2006-03-08 | 2007-10-18 | Ps Mitsubishi Construction Co Ltd | Prestress introducing method to filling part between precast concrete members |
| JP2008133612A (en) * | 2006-11-27 | 2008-06-12 | Sumitomo Osaka Cement Co Ltd | Repairing method for prestressed concrete structure |
| JP4732310B2 (en) * | 2006-11-27 | 2011-07-27 | 住友大阪セメント株式会社 | Repair method for prestressed concrete structures |
| JP2011149274A (en) * | 2011-03-29 | 2011-08-04 | Sumitomo Osaka Cement Co Ltd | Construction method for repairing prestressed concrete structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0364030B2 (en) | 1991-10-03 |
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