JP4556212B2 - Anchor bolt installation method for concrete hollow slab - Google Patents
Anchor bolt installation method for concrete hollow slab Download PDFInfo
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- JP4556212B2 JP4556212B2 JP2005227353A JP2005227353A JP4556212B2 JP 4556212 B2 JP4556212 B2 JP 4556212B2 JP 2005227353 A JP2005227353 A JP 2005227353A JP 2005227353 A JP2005227353 A JP 2005227353A JP 4556212 B2 JP4556212 B2 JP 4556212B2
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Description
本発明は、例えば、落橋防止に用いられるアンカーボルトをコンクリート中空床版に設置するコンクリート中空床版に対するアンカーボルト設置方法に関する。 The present invention relates to an anchor bolt installation method for a concrete hollow floor slab in which, for example, an anchor bolt used for preventing a falling bridge is installed on a concrete hollow floor slab.
従来、高架道路橋や河川橋には、重量を軽減することによる長スパン化や施工性向上等を目的としてコンクリート床版桁の内部に中空部を有するコンクリート中空床版が用いられている（例えば、特許文献１を参照）。 Conventionally, a concrete hollow floor slab having a hollow portion inside a concrete slab girder is used for an elevated road bridge and a river bridge for the purpose of increasing span by reducing weight and improving workability (for example, , See Patent Document 1).
このコンクリート中空床版１は、図４、図５に示すように、床版１の下面より突出させた配置にアンカーボルト２，２...が設置され、このアンカーボルト２を介して橋台や橋脚等の下部工３に設置された変位制限装置４等に固定されるようになっている。 As shown in FIGS. 4 and 5, the concrete hollow floor slab 1 is provided with anchor bolts 2, 2... In an arrangement projecting from the lower surface of the floor slab 1. It is fixed to a displacement limiting device 4 or the like installed in the substructure 3 such as a pier.
アンカーボルト２は、十分な付着強度を得るために中空部５を避けてコンクリート部内に埋め込まれている。 The anchor bolt 2 is embedded in the concrete portion avoiding the hollow portion 5 in order to obtain sufficient adhesion strength.
尚、変位制限装置４は、例えば、アンカーボルト２によりコンクリート中空床版１に固定され、下部工３を挟むように配置された一対の長手方向制止部材６，６と、両長手方向制止部材６，６の両側部に配置され、下部工３の側壁面にアンカーボルト７，７...により固定された幅方向制止部材８，８とを備え、橋長手方向及び幅方向の変位を制限するようになっている。
しかし、上述の如き従来の技術では、中空部以外のコンクリート部に、床版全体の強度維持に必要な鉄筋やＰＣ緊張材が配置されていることが多く、中空部を避けてアンカーボルトを設置しようとすると鉄筋やＰＣ緊張材を傷つけるおそれがあり、また、鉄筋やＰＣ緊張材が複雑に配置されている場合には、アンカーボルトを設置する部分を確保できないという問題があった。 However, in the conventional technology as described above, reinforcing bars and PC tendons necessary for maintaining the strength of the entire floor slab are often placed in the concrete part other than the hollow part, and anchor bolts are installed avoiding the hollow part. Attempts to damage the rebar and PC tendon, and when the rebar and PC tendon are arranged in a complex manner, there is a problem that a portion for installing the anchor bolt cannot be secured.
そこで本発明は、上述の従来技術の問題を鑑み、コンクリート中空床版に好適にアンカーボルトを設置することができるコンクリート中空床版に対するアンカーボルト設置方法の提供を目的とする。 Then, this invention aims at provision of the anchor bolt installation method with respect to the concrete hollow floor slab which can install an anchor bolt suitably for a concrete hollow slab in view of the problem of the above-mentioned prior art.
上述の如き従来の問題を解決し、所期の目的を達成するための請求項１に記載の発明は、床版長手方向に向けた中空部を有するコンクリート中空床版の下面より、前記中空部に達するアンカーボルト挿通孔を設け、該アンカーボルト挿通孔より前記アンカーボルトを挿入して該アンカーボルトの一部を前記中空部内に突出させ、前記中空部内の前記アンカーボルトの周囲にモルタル等の固化材を注入し、前記中空部内に前記アンカーボルトと一体化した抜け止め部を成形し、該抜け止め部により前記コンクリート中空床版に対しその下面より突出させた配置にアンカーボルトを設置するコンクリート中空床版に対するアンカーボルト設置方法において、前記アンカーボルト挿通孔径よりも大きく広がる形状の流れ防止用袋を、袋内にアンカーボルトを挿入した配置に前記中空部内に設置しておき、該流れ防止用袋内に前記固化材を注入して前記抜け止め部を成形することを特徴とする。 In order to solve the conventional problems as described above and achieve the intended object, the invention according to claim 1 is characterized in that the hollow portion is formed from the lower surface of the concrete hollow floor slab having a hollow portion in the longitudinal direction of the floor slab. An anchor bolt insertion hole is provided, and the anchor bolt is inserted through the anchor bolt insertion hole so that a part of the anchor bolt protrudes into the hollow portion, and mortar or the like is solidified around the anchor bolt in the hollow portion. Concrete hollow in which a material is injected, a retaining portion integrated with the anchor bolt is formed in the hollow portion, and the anchor bolt is installed in an arrangement projecting from the lower surface of the concrete hollow floor slab by the retaining portion. In the anchor bolt installation method for the floor slab, the flow prevention bag having a shape that is larger than the diameter of the anchor bolt insertion hole is anchored in the bag. Leave installed in place of inserting the belt into the hollow portion, characterized by forming the retaining portion above by injecting the solidifying material in the bag for preventing the flow.
本発明に係るコンクリート中空床版に対するアンカーボルト設置方法は、床版長手方向に向けた中空部を有するコンクリート中空床版に対し、その下面より突出させた配置にアンカーボルトを設置するコンクリート中空床版に対するアンカーボルト設置方法において、前記コンクリート中空床版の下面より前記中空部に達するアンカーボルト挿通孔を設け、該アンカーボルト挿通孔より前記アンカーボルトを挿入し、前記アンカーボルトの一部を前記中空部内に突出させ、前記中空部内の前記アンカーボルトの周囲にモルタル等の固化材を注入し、前記中空部内に前記アンカーボルトと一体化した抜け止め部を成形し、該抜け止め部により前記コンクリート中空床版に対し前記アンカーボルトを設置することによって、抜け止め部により十分な強度が確保され、中空部を避けずともアンカーボルトを設置することができ、コンクリート床版中に配置された鉄筋やＰＣ緊張材を傷つけない。 An anchor bolt installation method for a concrete hollow floor slab according to the present invention is a concrete hollow floor slab in which anchor bolts are installed in an arrangement protruding from the lower surface of a concrete hollow floor slab having a hollow portion directed in the longitudinal direction of the floor slab. In the anchor bolt installation method, an anchor bolt insertion hole that reaches the hollow portion from the lower surface of the concrete hollow floor slab is provided, the anchor bolt is inserted from the anchor bolt insertion hole, and a part of the anchor bolt is inserted into the hollow portion. A solidified material such as mortar is injected around the anchor bolt in the hollow portion, a retaining portion integrated with the anchor bolt is formed in the hollow portion, and the concrete hollow floor is formed by the retaining portion. By installing the anchor bolt on the plate, it will be more Strength is ensured, without avoiding the hollow portion can be installed anchor bolts, not to damage the rebar and PC tendon placed in the concrete bed plate.
また、前記アンカーボルト挿通孔径よりも大きく広がる形状の流れ防止用袋を、袋内にアンカーボルトを挿入した配置に前記中空部内に設置しておき、該流れ防止用袋内に前記固化材を注入して前記抜け止め部を成形することによって、固化材が不要な部分に流れ出すのを防止することができる。 In addition, a flow prevention bag having a shape wider than the diameter of the anchor bolt insertion hole is installed in the hollow portion in an arrangement in which the anchor bolt is inserted into the bag, and the solidified material is injected into the flow prevention bag. By forming the retaining portion, it is possible to prevent the solidified material from flowing out to an unnecessary portion.
次に、本発明に係るアンカーボルトの設置方法について説明する。尚、上述の従来例と同一の部分には同一符号を付して説明する。 Next, an anchor bolt installation method according to the present invention will be described. The same parts as those in the above-described conventional example will be described with the same reference numerals.
図１は本発明方法によるアンカーボルト設置状態の一例を示し、図中符号１はコンクリート中空床版、符号２はアンカーボルトである。 FIG. 1 shows an example of an anchor bolt installation state according to the method of the present invention. In the figure, reference numeral 1 denotes a concrete hollow floor slab, and reference numeral 2 denotes an anchor bolt.
コンクリート中空床版１は、図４、図５に示す従来例と同様に、床版長手方向に向けた中空部５，５...を有している。 The concrete hollow floor slab 1 has hollow portions 5, 5... Oriented in the longitudinal direction of the floor slab, as in the conventional examples shown in FIGS.
このコンクリート中空床版１は、床版下面より突出させた配置にアンカーボルト２が設置され、このアンカーボルト２を介して橋台、橋脚等の下部工に設置された変位制限装置等に固定されるようになっている。 The concrete hollow floor slab 1 is provided with anchor bolts 2 in an arrangement protruding from the bottom surface of the floor slab, and is fixed to a displacement limiting device or the like installed in a substructure such as an abutment or a bridge pier via the anchor bolts 2. It is like that.
このアンカーボルト２の設置は、まず、所定の箇所にコアボーリングマシーン等により床版下面より中空部５に到達するアンカーボルト挿通孔１０を形成する。 In the installation of the anchor bolt 2, an anchor bolt insertion hole 10 that reaches the hollow portion 5 from the bottom surface of the floor slab is first formed at a predetermined location by a core boring machine or the like.
このアンカーボルト挿通孔１０の内径は、アンカーボルト２の外径より十分に大きく、アンカーボルト２を挿入した状態で隙間からモルタル等の固化材を注入できる大きさとする。 The inner diameter of the anchor bolt insertion hole 10 is sufficiently larger than the outer diameter of the anchor bolt 2 so that a solidified material such as mortar can be injected from the gap while the anchor bolt 2 is inserted.
次に、図２に示すように、アンカーボルト２の挿入側に流れ防止用袋１１を被せ、それをアンカーボルト挿通孔１０より中空部５内に挿入し、アンカーボルト２の一部を中空部５内に突出させる。 Next, as shown in FIG. 2, the flow prevention bag 11 is put on the insertion side of the anchor bolt 2, and it is inserted into the hollow portion 5 through the anchor bolt insertion hole 10, and a part of the anchor bolt 2 is inserted into the hollow portion. 5 to project.
このとき、流れ防止用袋１１の基端開口部は、床版下面より下側に出した状態にしておく。 At this time, the base end opening of the flow preventing bag 11 is left below the floor slab.
尚、先に流れ防止用袋１１を中空部内に挿入しておき、そこにアンカーボルト２を挿入するようにしてもよい。 The flow preventing bag 11 may be inserted into the hollow portion first, and the anchor bolt 2 may be inserted there.
そして、基端側開口部より防止用袋１１内にモルタル等の固化材１２を注入し、流れ防止用袋１１内に固化材１２を充填する。 Then, a solidifying material 12 such as mortar is injected into the prevention bag 11 from the base end side opening, and the solidification material 12 is filled into the flow prevention bag 11.
この流れ防止用袋１１は、広がった際に、外形がアンカーボルト挿通孔１０の内径よりも大きくなるように形成されており、固化材１２を充填し、十分養生し硬化させることにより、外形が流れ防止用袋１１に覆われ、アンカーボルト挿通孔１０の内径よりも外形が大きい抜け止め部１３が、中空部５内のアンカーボルト２の周囲にアンカーボルト２と一体化されて形成される。 The flow prevention bag 11 is formed so that the outer shape becomes larger than the inner diameter of the anchor bolt insertion hole 10 when spread, and the outer shape is filled with the solidifying material 12, sufficiently cured and cured. A retaining portion 13 that is covered with the flow preventing bag 11 and has an outer shape larger than the inner diameter of the anchor bolt insertion hole 10 is formed integrally with the anchor bolt 2 around the anchor bolt 2 in the hollow portion 5.
このようにアンカーボルト挿通孔１０の内径よりも大きい抜け止め部１３が形成されたことにより、アンカーボルト２がコンクリート中空床版１に対し、その下面より突出させた配置に抜け出し不能に設置される。 By forming the retaining portion 13 larger than the inner diameter of the anchor bolt insertion hole 10 in this way, the anchor bolt 2 is installed on the concrete hollow floor slab 1 so as not to be pulled out from the lower surface thereof. .
尚、流れ防止用袋は、上述の形態に限定されず、その他図３に示す如き形状であってもよい。 In addition, the bag for flow prevention is not limited to the above-mentioned form, Other shapes as shown in FIG. 3 may be sufficient.
この流れ防止用袋１４を使用することにより、袋１４が広がった際、即ち、流れ防止用袋１４内に固化材１５が充填された際に、下端にフランジ部１６を有する抜け止め部１７が形成されるようになっている。 By using this flow prevention bag 14, when the bag 14 spreads, that is, when the solidification material 15 is filled in the flow prevention bag 14, the retaining portion 17 having the flange portion 16 at the lower end is provided. It is supposed to be formed.
また、この場合、アンカーボルト２の周囲の固化材量が少ないので強度を得るために、固化材１５には、高強度モルタルを使用する。 In this case, since the amount of solidified material around the anchor bolt 2 is small, a high-strength mortar is used as the solidified material 15 in order to obtain strength.
更に、流れ防止用袋は、バルーン（風船）等のように伸縮性を有するものであってもよい。 Further, the flow preventing bag may be a stretchable bag such as a balloon.
１ コンクリート中空床版
２ アンカーボルト
５ 中空部
１０ アンカーボルト挿通孔
１１ 流れ防止用袋
１２ 固化材（モルタル）
１３ 抜け止め部
１４ 流れ防止用袋
１５ 固化材（高強度モルタル）
１６ フランジ部
１７ 抜け止め部
DESCRIPTION OF SYMBOLS 1 Concrete hollow floor slab 2 Anchor bolt 5 Hollow part 10 Anchor bolt insertion hole 11 Bag for flow prevention 12 Solidification material (mortar)
13 Retaining part 14 Flow prevention bag 15 Solidified material (high strength mortar)
16 Flange part 17 Retaining part
Claims (1)
前記アンカーボルト挿通孔径よりも大きく広がる形状の流れ防止用袋を、袋内にアンカーボルトを挿入した配置に前記中空部内に設置しておき、該流れ防止用袋内に前記固化材を注入して前記抜け止め部を成形することを特徴としてなるコンクリート中空床版に対するアンカーボルト設置方法。
An anchor bolt insertion hole reaching the hollow portion is provided from the lower surface of the concrete hollow floor slab having a hollow portion directed in the longitudinal direction of the floor slab, and the anchor bolt is inserted through the anchor bolt insertion hole to partially connect the anchor bolt Projecting into the hollow part, injecting a solidifying material such as mortar around the anchor bolt in the hollow part, forming a retaining part integrated with the anchor bolt in the hollow part, In the anchor bolt installation method for the concrete hollow floor slab in which the anchor bolt is installed in an arrangement protruding from the lower surface of the concrete hollow floor slab,
A flow prevention bag having a shape wider than the anchor bolt insertion hole diameter is installed in the hollow portion in an arrangement in which anchor bolts are inserted into the bag, and the solidifying material is injected into the flow prevention bag. The anchor bolt installation method with respect to the concrete hollow floor slab characterized by shape | molding the said retaining part .
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| Application Number | Priority Date | Filing Date | Title |
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| JP2005227353A JP4556212B2 (en) | 2005-08-05 | 2005-08-05 | Anchor bolt installation method for concrete hollow slab |
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| JP2005227353A JP4556212B2 (en) | 2005-08-05 | 2005-08-05 | Anchor bolt installation method for concrete hollow slab |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2010123916A Division JP4978874B2 (en) | 2010-05-31 | 2010-05-31 | Anchor bolt installation method for concrete hollow slab |
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| JP2007040038A JP2007040038A (en) | 2007-02-15 |
| JP4556212B2 true JP4556212B2 (en) | 2010-10-06 |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4519029B2 (en) * | 2005-08-05 | 2010-08-04 | 東海ゴム工業株式会社 | Anchor fixing method to PC hollow floor slab bridge |
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|---|---|---|---|---|
| JPS5424410A (en) * | 1977-07-25 | 1979-02-23 | Sadafusa Okajima | Method of studding and fixing anchor bolt |
| JPH1018226A (en) * | 1996-07-02 | 1998-01-20 | Nippon Doro Kodan | Concrete pier and concrete pier reinforcing method and tendon anchoring method |
| JP2000282416A (en) * | 1999-03-29 | 2000-10-10 | Nippon Mentekku Kk | Fixing device for foaming form |
| JP2003227106A (en) * | 2002-01-31 | 2003-08-15 | Oriental Construction Co Ltd | Concrete bridge and mounting method of retrofitting member |
| JP2003261989A (en) * | 2002-03-08 | 2003-09-19 | Japan Drive-It Co Ltd | Anchor bolt unit and anchor execution method |
| JP2004084459A (en) * | 2002-06-28 | 2004-03-18 | Tokai Rubber Ind Ltd | Repair/reinforcement method for hollow concrete deck slab |
| JP2005220629A (en) * | 2004-02-06 | 2005-08-18 | Tokai Rubber Ind Ltd | Partial repair reinforcing method of concrete hollow floor slab |
| JP2007040065A (en) * | 2005-08-05 | 2007-02-15 | Tokai Rubber Ind Ltd | Construction method for fixing anchor to pc hollow floor panel bridge |
-
2005
- 2005-08-05 JP JP2005227353A patent/JP4556212B2/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5424410A (en) * | 1977-07-25 | 1979-02-23 | Sadafusa Okajima | Method of studding and fixing anchor bolt |
| JPH1018226A (en) * | 1996-07-02 | 1998-01-20 | Nippon Doro Kodan | Concrete pier and concrete pier reinforcing method and tendon anchoring method |
| JP2000282416A (en) * | 1999-03-29 | 2000-10-10 | Nippon Mentekku Kk | Fixing device for foaming form |
| JP2003227106A (en) * | 2002-01-31 | 2003-08-15 | Oriental Construction Co Ltd | Concrete bridge and mounting method of retrofitting member |
| JP2003261989A (en) * | 2002-03-08 | 2003-09-19 | Japan Drive-It Co Ltd | Anchor bolt unit and anchor execution method |
| JP2004084459A (en) * | 2002-06-28 | 2004-03-18 | Tokai Rubber Ind Ltd | Repair/reinforcement method for hollow concrete deck slab |
| JP2005220629A (en) * | 2004-02-06 | 2005-08-18 | Tokai Rubber Ind Ltd | Partial repair reinforcing method of concrete hollow floor slab |
| JP2007040065A (en) * | 2005-08-05 | 2007-02-15 | Tokai Rubber Ind Ltd | Construction method for fixing anchor to pc hollow floor panel bridge |
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