JP2018076733A - Method of constructing connection structure of precast structural member and material cured with time - Google Patents

Method of constructing connection structure of precast structural member and material cured with time Download PDF

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JP2018076733A
JP2018076733A JP2016220320A JP2016220320A JP2018076733A JP 2018076733 A JP2018076733 A JP 2018076733A JP 2016220320 A JP2016220320 A JP 2016220320A JP 2016220320 A JP2016220320 A JP 2016220320A JP 2018076733 A JP2018076733 A JP 2018076733A
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time
precast
structural member
connection structure
tension
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JP6908988B2 (en
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明夫 正司
Akio Shoji
明夫 正司
悟司 大谷
Satoshi Otani
悟司 大谷
正之 櫻井
Masayuki Sakurai
正之 櫻井
輝康 渡邊
Teruyasu Watanabe
輝康 渡邊
圭太 下中村
Keita Shimonakamura
圭太 下中村
芳徳 高松
Yoshinori Takamatsu
芳徳 高松
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Kumagai Gumi Co Ltd
Geostr Corp
Oriental Shiraishi Corp
Gaeart Co Ltd
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Kumagai Gumi Co Ltd
Geostr Corp
Oriental Shiraishi Corp
Gaeart Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a method of constructing a connection structure of a precast structural member and a material cured with time capable of eliminating procedure and curing period to reduce the construction period, and also improving crack proof strength of a joint part and a concave part by means of a simple method.SOLUTION: A method of constructing a connection structure of a precast structural member and a material cured with time in which a material cured with time 3 is pored in a joint part A between precast structural members 2 (precast reinforced-concrete floor slab) to connect the precast structural member 2 to the material cured with time 3 integrally. Before the material cured with time 3 is pored, a tensioning force applying step is carried out which applies a tensioning force to the joint part A, and then a poring step for poring the material cured with time 3 in the joint part A is carried out to connect the precast structural member 2 to the material cured with time 3 integrally.SELECTED DRAWING: Figure 1

Description

本発明は、プレキャスト構造部材同士の間に形成された目地部又はプレキャスト構造部材の凹所に形成された目地部に経時硬化材を場所(後)打ちして連結一体化するプレキャスト構造部材と経時硬化材の連結構造の構築方法に関し、より詳しくは、橋梁のプレキャスト構造部材と現場打ちの目地部を一体化するに際して経時硬化材の打設前に緊張力を与えて目地部のひび割れ耐力を向上させるプレキャスト構造部材と経時硬化材の連結構造の構築方法に関するものである。   The present invention relates to a precast structural member that is integrally connected by placing a time-hardening material into a joint portion formed between the precast structural members or a joint portion formed in a recess of the precast structural member. Regarding the construction method of the connection structure of hardened materials, more specifically, when integrating the precast structural members of the bridge and the joints on the spot, improve the cracking resistance of the joints by applying tension before placing the hardened material over time. The present invention relates to a method for constructing a connection structure of a precast structural member and a time-hardening material.

従来、プレキャスト構造部材同士の間に目地部を設け、そこにコンクリートなどの場所(後)打ちの経時硬化材を打設して連結一体化することが行われている。例えば、特許文献1には、互いに接合されるプレキャスト床版接合端部同士が突き合わされた目地部に、プレキャスト床版の上端筋と下端筋の端部を円弧状としたループ鉄筋を延設し、そこにコンクリートを打設してプレキャスト床版同士を連結一体化したプレキャスト床版の連結方法が開示されている(特許文献1の特許請求の範囲の請求項1、明細書の段落[0034]〜[0038]、図面の図1〜図5等参照)。   Conventionally, joint portions are provided by providing joint portions between precast structural members, and placing a time-curing material such as concrete (post-), such as concrete, on them. For example, in Patent Document 1, a loop reinforcing bar in which the upper end bars and the lower end bars of a precast floor slab are formed in an arc shape is extended to a joint where the joint ends of the precast floor slabs to be bonded to each other are abutted. In addition, a method for connecting precast floor slabs in which concrete is cast there and the precast floor slabs are connected and integrated is disclosed (claim 1 of patent document 1 and paragraph [0034] of the specification). To [0038], see FIGS.

しかし、特許文献1に記載のプレキャスト床版の連結方法は、施工現場にて橋幅方向に多数設けられたループ継ぎ手に補強鉄筋を結束し、間詰めコンクリートを打設する必要があり、施工現場での連結作業が煩雑であるという問題があった。また、ループ鉄筋の曲げ半径を確保するために、橋梁用コンクリートプレキャスト床版が厚くなって高重量化するため、橋梁用コンクリートプレキャスト床版を支持する主桁に高負荷がかかって経年劣化が進行し易いという問題もあった。その上、車両が通る際の繰り返しの輪荷重によって、橋梁用コンクリートプレキャスト床版10同士を連結する目地部にひび割れが生じ易という問題もあった。   However, the method of connecting the precast slabs described in Patent Document 1 requires that reinforcing reinforcing bars be bound to a large number of loop joints provided in the bridge width direction at the construction site, and that the interstitial concrete be cast, There was a problem that the connecting work in the was complicated. In addition, in order to secure the bending radius of the loop rebar, the concrete precast slab for bridges becomes thicker and heavier, so the main girder supporting the concrete precast slab for bridges is subjected to a heavy load and aged deterioration occurs. There was also a problem that it was easy to do. In addition, there has been a problem that cracks are likely to occur in the joints connecting the concrete precast slabs 10 for bridges due to repeated wheel loads when the vehicle passes.

これらの問題を解決するべく、特許文献2には、出願人らが提案した、橋軸方向Lの側端部1aに取り付けられてH型継手金具に嵌合されるC型継手金具2と、橋軸方向Lの側端面1sに凹設される凹部3と、凹部3内面に基端部を取り付けられるとともに、凹部3内面から先端部を橋軸方向Lに突出した補強部材4と、を備え、隣り合う橋梁用コンクリートプレキャスト床版1,1同士を連結する際に、橋梁用PPC版1,1にそれぞれ形成された凹部3同士を互いに対面させて目地空間を形成し、この目地空間内に補強部材4の先端部分を埋没した状態でグラウト材を充填する橋梁用コンクリートプレキャスト床版1の目地構造の構築方法が開示されている(特許文献2の特許請求の範囲の請求項1、明細書の段落[0027]〜[0034]、図面の図1,図2等参照)。   In order to solve these problems, Patent Document 2 discloses a C-type joint fitting 2 that is proposed by the applicants and is attached to the side end portion 1a in the bridge axis direction L and is fitted to the H-type joint fitting, A recess 3 that is recessed in the side end surface 1s in the bridge axis direction L, and a reinforcing member 4 that has a proximal end attached to the inner surface of the recess 3 and that protrudes from the inner surface of the recess 3 in the bridge axis direction L. When connecting adjacent concrete precast floor slabs 1 and 1 for bridges, the concave portions 3 formed in the PPC plates 1 and 1 for bridges face each other to form a joint space, and in this joint space A method for constructing a joint structure of a concrete precast floor slab 1 for a bridge filled with a grout material in a state in which a tip portion of a reinforcing member 4 is buried is disclosed (claims 1 and 2 of claims of patent document 2) Paragraphs [0027] to [00] 4], Figure 1, reference 2, etc. Figure of the drawing).

しかし、特許文献2に記載のプレキャスト床版の目地構造の構築方法は、目地部にコンクリートを打設して所定強度が発現した後、プレキャスト床版間に緊張力を導入し、継手金具にグラウト材等を充填する必要があった。このため、施工手順が多いうえグラウトやコンクリートなどの経時硬化材が硬化するまでの養生期間が二重に必要であり、施工期間が増加し、その分コストアップの要因となるという問題があった。また、現場打ちの部分と既設のプレキャスト部材とは肌別れしてひび割れが発生し易く、その連結部分が多くなるとそれだけ構造物の弱点の増加につながるおそれがあった。   However, the method for constructing the joint structure of the precast floor slab described in Patent Document 2 introduces tension between the precast floor slabs after placing concrete on the joints to develop a predetermined strength, and grouts the joint bracket. It was necessary to fill with materials. For this reason, there is a problem that there are many construction procedures and a double curing period is required until a time-hardening material such as grout or concrete is hardened, which increases the construction period and increases the cost accordingly. . In addition, the on-site part and the existing precast member are easily separated from each other and cracks are likely to occur, and if the number of connected parts increases, the weakness of the structure may increase accordingly.

特開2010−236258号公報JP 2010-236258 A 特開2015−101841号公報Japanese Patent Laying-Open No. 2015-101841

そこで、本発明は、前述した問題を鑑みて案出されたものであり、その目的とするところは、簡単な方法により作業手順や養生期間を削減して施工期間を短縮するとともに、目地部や凹部のひび割れ耐力を向上することができるプレキャスト構造部材と経時硬化材の連結構造の構築方法を提供することにある。   Therefore, the present invention has been devised in view of the above-mentioned problems, and the object of the present invention is to reduce the work procedure and the curing period by a simple method to shorten the construction period, It is an object of the present invention to provide a method for constructing a connection structure of a precast structural member and a time-hardening material that can improve cracking resistance of a concave portion.

請求項1に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法は、プレキャスト構造部材同士の間の目地部に経時硬化材を打設してプレキャスト構造部材と経時硬化材を連結一体化するプレキャスト構造部材と経時硬化材の連結構造の構築方法であって、経時硬化材を打設する前に、前記目地部に緊張力を付与する緊張力付与工程を行い、その後、前記目地部に経時硬化材を打設する打設工程を行って、プレキャスト構造部材と経時硬化材を連結一体化することを特徴とする。   The method for constructing a connection structure between a precast structural member and a time-hardening material according to claim 1 is a method of connecting and integrating the precast structural member and the time-hardening material by placing a time-hardening material at a joint between the precast structural members. A construction method of a connection structure of a precast structural member and a time-hardening material, and before placing the time-hardening material, a tension applying step for applying tension to the joint portion is performed, and then the joint portion is applied. A casting process for casting a time-curing material is performed, and the precast structural member and the time-curing material are connected and integrated.

請求項2に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法は、請求項1に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法において、前記緊張力を緩めるリリース工程を有していないことを特徴とする。   The method for constructing the connection structure between the precast structural member and the time-curing material according to claim 2 is the construction method of the connection structure between the precast structural member and the time-curing material according to claim 1, wherein the release step of releasing the tension is performed. It is characterized by not having.

請求項3に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法は、請求項1又は2に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法において、前記緊張力付与工程では、前記プレキャスト構造部材の自重による静止摩擦力以内の緊張力を付与することを特徴とする。   The construction method of the connection structure of the precast structure member and the time-curing material according to claim 3 is the construction method of the connection structure of the precast structure member and the time-curing material according to claim 1 or 2, A tension force within a static frictional force due to the weight of the precast structural member is applied.

請求項4に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法は、請求項1又は2に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法において、前記緊張力付与工程では、ブロックや楔などの掛止部材で前記プレキャスト構造部材を掛け止めて緊張力を付与することを特徴とする。   The construction method of the connection structure of the precast structure member and the time-curing material according to claim 4 is the construction method of the connection structure of the precast structure member and the time-curing material according to claim 1 or 2, The precast structural member is latched by a latching member such as a block or a wedge, and tension is applied.

請求項5に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法は、請求項1ないし4のいずれかに記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法において、前記プレキャスト構造部材又はプレキャスト構造部材同士の一方は、プレキャスト鉄筋コンクリート床版であることを特徴とする。   The method for constructing a connection structure between a precast structural member and a time-curing material according to claim 5 is the construction method for a connection structure between a precast structural member and a time-curing material according to any one of claims 1 to 4. One of the members or the precast structural members is a precast reinforced concrete slab.

請求項6に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法は、請求項5に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法において、連結する2つの前記プレキャスト鉄筋コンクリート床版の端部付近には、上方に広がるテーパー状の嵌合凹部を有する埋設金具がそれぞれ埋設されており、前記緊張力付与工程では、連結する2つの前記プレキャスト鉄筋コンクリート床版の両方の嵌合凹部に嵌合する一対の嵌合部を有する嵌合金具を上方から嵌め込むことにより前記プレキャスト鉄筋コンクリート床版間に緊張力を付与することを特徴とする。   The method for constructing a connection structure between a precast structural member and a time-hardening material according to claim 6 is the construction method for a connection structure between a precast structure member and a time-hardening material according to claim 5, wherein the two precast reinforced concrete floors to be connected are connected. In the vicinity of the end of the plate, embedded metal fittings having tapered fitting recesses extending upward are respectively embedded, and in the tension applying step, both fitting recesses of the two precast reinforced concrete floor plates to be connected are connected. A tensioning force is applied between the precast reinforced concrete slabs by fitting a fitting fitting having a pair of fitting parts fitted into the upper part from above.

請求項7に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法は、プレキャスト構造部材に形成された凹部に経時硬化材を打設してプレキャスト構造部材と経時硬化材を連結一体化するプレキャスト構造部材と経時硬化材の連結構造の構築方法であって、経時硬化材を打設する前に、前記凹部に緊張力を付与する緊張力付与工程を行い、その後、前記目地部又は前記凹部に経時硬化材を打設する打設工程を行って、プレキャスト構造部材と経時硬化材を連結一体化することを特徴とする。   The method for constructing a connection structure of a precast structural member and a time-hardening material according to claim 7 is a method of connecting and integrating the precast structural member and the time-hardening material by placing the time-hardening material in a recess formed in the precast structural member. A method for constructing a connection structure between a precast structural member and a time-hardening material, and before placing the time-hardening material, a tension applying step for applying tension to the concave portion is performed, and then the joint portion or the concave portion And a pre-cast structural member and the time-curing material are connected and integrated by performing a placing step of placing a time-curing material.

請求項8に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法は、請求項7に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法において、前記緊張力を緩めるリリース工程を有していないことを特徴とする。   The method for constructing a connection structure between the precast structural member and the time-curing material according to claim 8 is the method for constructing a connection structure between the precast structural member and the time-curing material according to claim 7, wherein the release step of releasing the tension is performed. It is characterized by not having.

請求項9に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法は、請求項7又は8に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法において、前記凹部は、プレキャスト構造部材の劣化部分を撤去することにより形成されたことを特徴とする。   The method for constructing a connection structure between a precast structure member and a time-curing material according to claim 9 is the method for constructing a connection structure between a precast structure member and a time-curing material according to claim 7 or 8, wherein the recess has a precast structure. It is formed by removing a deteriorated part of a member.

請求項10に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法は、請求項9に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法において、前記緊張力付与工程では、前記凹部の対向する2つの側壁にそれぞれ埋設された後施工アンカー同士を緊結するターンバックルなどの緊結治具で互いに緊結することにより前記凹部に緊張力を付与することを特徴する。   The construction method of the connection structure of the precast structural member and the time-curing material according to claim 10 is the construction method of the connection structure of the precast structural member and the time-curing material according to claim 9, It is characterized in that a tension force is applied to the concave portion by fastening them with a fastening jig such as a turnbuckle for fastening the post-construction anchors embedded in two opposite side walls of the concave portion.

請求項1〜6に記載の発明によれば、経時硬化材を打設する前にプレキャスト構造部材に緊張力を付与するだけで目地部のひび割れ耐力を向上することができる。このため、ひび割れから雨水等が浸食して内部補強鉄筋等が腐食するおそれが少なくなり、構造体の耐久性を向上させることができる。また、経時硬化材を2度打ちする必要がなくなり、作業手順や養生期間を削減して施工期間を短縮することができる。   According to invention of Claims 1-6, the cracking resistance of a joint part can be improved only by giving tension | tensile_strength to a precast structural member, before setting a time hardening material. For this reason, there is less possibility that rainwater or the like erodes from cracks and the internal reinforcing steel bars or the like corrode, and the durability of the structure can be improved. In addition, it is not necessary to strike the time-curing material twice, and the work procedure and the curing period can be reduced to shorten the construction period.

特に、請求項2に記載の発明によれば、緊張力を緩めるリリース工程を有していないので、後打ちした経時硬化材にはプレストレスは導入されないものの、プレキャスト構造部材にはプレストレスが導入されることとなり、肌別れしてひび割れが発生し易い打継ぎの目地部のひび割れ耐力を向上させることができる。   In particular, according to the invention described in claim 2, since there is no release process for relaxing the tension, prestress is not introduced into the post-cast time-cured material, but prestress is introduced into the precast structural member. As a result, the cracking resistance of the joint portion where the cracks are easily separated and cracks are likely to occur can be improved.

特に、請求項3に記載の発明によれば、プレキャスト構造部材の自重による静止摩擦力以内の緊張力を付与するので、ひび割れ抑制の緊張力としては充分である上、プレキャスト構造部材を固定する手間や装置や機械が不要となり、さらに作業時間を短縮することができる。このため、さらなるコストダウンを達成することができる。   In particular, according to the invention described in claim 3, since the tension force within the static frictional force due to the weight of the precast structural member is applied, it is sufficient as a tension force for suppressing cracking, and it is troublesome to fix the precast structural member. This eliminates the need for a machine, a device, and a machine, and further shortens the work time. For this reason, further cost reduction can be achieved.

特に、請求項4に記載の発明によれば、掛止部材を噛ます手間が増えるものの、プレキャスト構造部材間に係る緊張力を増加させることができ、ひび割れ抑制効果を高めることができる。   In particular, according to the fourth aspect of the present invention, although the labor for biting the latching member is increased, the tension force between the precast structural members can be increased, and the crack suppressing effect can be enhanced.

特に、請求項5に記載の発明によれば、本発明に好適な橋梁のプレキャスト鉄筋コンクリート床版の設置作業に適用して前記作用効果を奏することができる。   In particular, according to the fifth aspect of the present invention, the above-described effects can be achieved by applying the present invention to installation work of a precast reinforced concrete floor slab of a bridge suitable for the present invention.

特に、請求項6に記載の発明によれば、前記緊張力付与工程の作業時間をさらに短縮することができるとともに、緊張力の導入が均一確実となり、さらに構造体の耐久性を向上させることができる。   In particular, according to the invention described in claim 6, the working time of the tension applying step can be further shortened, the introduction of the tension is uniformly ensured, and the durability of the structure can be further improved. it can.

請求項7〜10に記載の発明によれば、経時硬化材を打設する前にプレキャスト構造部材に緊張力を付与するだけで凹部のひび割れ耐力を向上することができる。このため、ひび割れから雨水等が浸食して内部補強鉄筋等が腐食するおそれが少なくなり、構造体の耐久性を向上させることができる。また、経時硬化材を2度打ちする必要がなくなり、作業手順や養生期間を削減して施工期間を短縮することができる。   According to the seventh to tenth aspects of the present invention, it is possible to improve the cracking resistance of the recess only by applying tension to the precast structural member before placing the time-hardening material. For this reason, there is less possibility that rainwater or the like erodes from cracks and the internal reinforcing steel bars or the like corrode, and the durability of the structure can be improved. In addition, it is not necessary to strike the time-curing material twice, and the work procedure and the curing period can be reduced to shorten the construction period.

特に、請求項8に記載の発明によれば、緊張力を緩めるリリース工程を有していないので、後打ちした経時硬化材にはプレストレスは導入されないものの、プレキャスト構造部材にはプレストレスが導入されることとなり、肌別れしてひび割れが発生し易い打継ぎ凹部のひび割れ耐力を向上させることができる。   In particular, according to the invention described in claim 8, since there is no release process for relaxing the tension, prestress is not introduced into the post-cast time-cured material, but prestress is introduced into the precast structural member. As a result, the cracking resistance of the joint recesses that are prone to cracking due to skin separation can be improved.

特に、請求項9に記載の発明によれば、本発明を劣化部分の補修作業に応用することができ、補修部分の剥離落下事故を防ぐことができ、構造体の耐久性及び安全性をさらに向上させることができる。   In particular, according to the invention described in claim 9, the present invention can be applied to repair work of a deteriorated portion, can prevent a fall-off accident of the repair portion, and further improve the durability and safety of the structure. Can be improved.

特に、請求項10に記載の発明によれば、ターンバックルなどの緊結治具で緊張力を付与するだけなので、緊張力付与工程の作業時間を短縮して劣化部分の補修作業のコストダウンを達成することができる。   In particular, according to the invention described in claim 10, since the tension force is only applied with a binding jig such as a turnbuckle, the work time of the tension force application process is shortened, and the cost for repairing the deteriorated portion is reduced. can do.

本発明の第1実施形態に係るプレキャスト構造部材と経時硬化材の連結構造の構成を示す鉛直断面図である。It is a vertical sectional view showing the composition of the connection structure of the precast structural member and the time-hardening material according to the first embodiment of the present invention. 同上の連結構造のプレキャスト構造部材を示す図であり、(a)は、鉛直断面図、(b)は、平面図である。It is a figure which shows the precast structural member of a connection structure same as the above, (a) is a vertical sectional view, (b) is a top view. 同上の連結構造の緊張力導入用鋼材を箱抜き部に設置した状態を示す説明図である。It is explanatory drawing which shows the state which installed the steel material for tension | tensile_strength introduction of a connection structure same as the above in the box extraction part. 本発明の第2実施形態に係る連結構造の埋設金具を示す斜視図である。It is a perspective view which shows the embed | buried metal fitting of the connection structure which concerns on 2nd Embodiment of this invention. 同上の埋設金具の平面図である。It is a top view of an embedded metal fitting same as the above. 図5のX−X線断面図である。FIG. 6 is a sectional view taken along line XX of FIG. 5. 本発明の第2実施形態に係る連結構造の嵌合金具を示す斜視図である。It is a perspective view which shows the fitting metal fitting of the connection structure which concerns on 2nd Embodiment of this invention. 同上の嵌合金具を示す平面図である。It is a top view which shows a fitting metal fitting same as the above. 同上の嵌合金具を示す側面図である。It is a side view which shows a fitting metal fitting same as the above. 本発明の第2実施形態に係る連結構造の2つの埋設金具に嵌合金具を嵌合させた状態を示す平面図であるIt is a top view which shows the state which made the fitting metal fitting fit into two embedded metal fittings of the connection structure which concerns on 2nd Embodiment of this invention. 図10のY−Y線鉛直断面図であり、(a)が嵌合金具6の装着前、(b)が嵌合金具6の装着後の状態を示している。FIG. 11 is a vertical cross-sectional view along line YY in FIG. 10, (a) shows a state before fitting metal fitting 6 and (b) shows a state after fitting metal fitting 6 is installed. 本発明の第3実施形態に係る連結構造の構成を示す鉛直断面図である。It is a vertical sectional view showing the composition of the connection structure concerning a 3rd embodiment of the present invention. 同上の連結構造のプレキャスト鉄筋コンクリート床版の修復前を示す鉛直断面図である。It is a vertical sectional view showing before repair of a precast reinforced concrete floor slab of the same connection structure. 本発明の第3実施形態に係る連結構造の構築方法の劣化部分撤去工程を示す工程説明図である。It is process explanatory drawing which shows the degradation part removal process of the construction method of the connection structure which concerns on 3rd Embodiment of this invention. 同上の構築方法のアンカー設置工程を示す工程説明図である。It is process explanatory drawing which shows the anchor installation process of the construction method same as the above. 同上の構築方法の緊張力導入用鋼材設置工程及び緊張力付与工程を示す工程説明図である。It is process explanatory drawing which shows the steel material installation process and tension | tensile_strength provision process of a tension | tensile_strength introduction of the construction method same as the above. 本発明の第3実施形態に係る連結構造の緊張力導入用鋼材の変形例1を示す構成説明図である。It is composition explanatory drawing which shows the modification 1 of the steel material for tension | tensile_strength introduction | transduction of the connection structure which concerns on 3rd Embodiment of this invention. 同上の緊張力導入用鋼材の変形例2を示す構成説明図である。It is composition explanatory drawing which shows the modification 2 of the steel material for tension | tensile_strength introduction same as the above.

以下、本発明に係るプレキャスト構造部材と経時硬化材の連結構造の構築方法を実施するための一実施形態について図面を参照しながら詳細に説明する。   Hereinafter, an embodiment for carrying out a method for constructing a connection structure of a precast structural member and a time-curing material according to the present invention will be described in detail with reference to the drawings.

[第1実施形態]
先ず、図1〜図3を用いて、本発明の第1実施形態に係るプレキャスト構造部材と経時硬化材の連結構造について説明する。図1は、本実施形態に係るプレキャスト構造部材と経時硬化材の連結構造1の構成を示す鉛直断面図である。図1に示すように、本実施形態に係るプレキャスト構造部材と経時硬化材の連結構造1(以下、単に連結構造という。)は、プレキャスト構造部材として2枚のプレキャスト鉄筋コンクリート床版2,2と、これらの2枚のプレキャスト鉄筋コンクリート床版2,2間に形成された隙間である目地部Aに打設された経時硬化材3と、この経時硬化材3に埋設された緊張力導入用鋼材4など、から構成されている。
[First Embodiment]
First, the connection structure between the precast structural member and the time-curing material according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a vertical sectional view showing a configuration of a connection structure 1 of a precast structural member and a time-hardening material according to the present embodiment. As shown in FIG. 1, the connection structure 1 (henceforth only connection structure) of the precast structural member and time-hardening material which concerns on this embodiment is two precast reinforced concrete floor slabs 2 and 2 as a precast structure member, A time-hardening material 3 placed in the joint portion A, which is a gap formed between the two precast reinforced concrete floor slabs 2, 2, and a steel material 4 for introducing a tension force embedded in the time-hardening material 3 , Is composed of.

(プレキャスト構造部材)
図2は、本実施形態に係る連結構造1のプレキャスト構造部材であるプレキャスト鉄筋コンクリート床版2を示す図であり、(a)は、鉛直断面図、(b)は、平面図である。
図2に示すように、プレキャスト鉄筋コンクリート床版2は、予め工場等で所定の鉄筋が配筋されてコンクリートが打設され、適切な養生期間が経過し所定の強度が発現した矩形盤状の鉄筋コンクリート製のスラブからなる床版である。
(Precast structural member)
Drawing 2 is a figure showing precast reinforced concrete floor slab 2 which is a precast structural member of connection structure 1 concerning this embodiment, (a) is a vertical sectional view and (b) is a top view.
As shown in FIG. 2, the precast reinforced concrete floor slab 2 is a rectangular plate-shaped reinforced concrete in which a predetermined reinforcing bar is placed in advance in a factory or the like and concrete is placed, and an appropriate curing period has elapsed and a predetermined strength is developed. This is a floor slab made of slab.

また、これらのプレキャスト鉄筋コンクリート床版2,2の連結部分である互いに対向する端部には、後述の緊張力導入用鋼材4の長手方向端部のナット部分を収容する複数の箱抜き部21が所定間隔をおいて形成されている。なお、図示形態では、平面視の四辺のうち一辺の端部にのみ箱抜き部21が形成されたものを例示したが、四辺のいずれの辺にも箱抜き部を形成して、橋軸方向の端部間、これと直交する橋幅方向の端部間でもいずれの方向にも連結してもよいことは云うまでもない。   In addition, a plurality of boxing portions 21 for accommodating nut portions at the longitudinal end portions of the steel material 4 for tension introduction described later are provided at end portions facing each other, which are connecting portions of these precast reinforced concrete floor slabs 2 and 2. It is formed at a predetermined interval. In the illustrated embodiment, the boxed portion 21 is formed only at the end of one side of the four sides in plan view. However, the boxed portion is formed on any of the four sides, and the bridge axis direction is formed. Needless to say, they may be connected in any direction between the ends of the two or between the ends in the bridge width direction orthogonal to the ends.

(経時硬化材)
本実施形態に係る連結構造1の経時硬化材3は、所定の鉄筋を配筋した後、現場打ちのコンクリートを打設した場所打ち鉄筋コンクリートである。この経時硬化材3は、図2に示す2枚のプレキャスト鉄筋コンクリート床版2間に形成された目地部Aに打設される。
(Aging material)
The time-hardening material 3 of the connection structure 1 according to the present embodiment is cast-in-place reinforced concrete in which a predetermined rebar is placed and then on-site concrete is placed. This time-hardening material 3 is placed in a joint portion A formed between two precast reinforced concrete slabs 2 shown in FIG.

勿論、本発明に係る経時硬化材は、幅が充分に狭い場合は、鉄筋を配筋する必要もないし、後述のように定着金具等の狭小の隙間に打設する場合は、粗骨材のないモルタルや、もっと流動性の高いグラウトとしても良いことは云うまでもない。要するに、本発明に係る経時硬化材は、セメントや石膏などの水和反応により硬化する水硬性物質や樹脂など、型枠内に打設して一定時間経過後に硬化するものであれば採用することができる。   Of course, the time-hardening material according to the present invention does not require reinforcing bars when the width is sufficiently narrow, and when it is placed in a narrow gap such as a fixing metal fitting as described later, It goes without saying that it can be used as a non-mortar or a more fluid grout. In short, the time-hardening material according to the present invention should be adopted as long as it is placed in a mold and hardened after a certain period of time, such as a hydraulic substance or resin that hardens by a hydration reaction such as cement or gypsum. Can do.

(緊張力導入用鋼材)
図3は、本実施形態に係る緊張力導入用鋼材4を箱抜き部21に設置した状態を示す説明図である。図3に示すように、本実施形態に係る連結構造1の緊張力導入用鋼材4は、PC鋼棒40の両端にねじが切られてナット41が螺着されたPC鋼材であり、ナットを締め付けることにより、プレキャスト鉄筋コンクリート床版2間に緊張力を付与する機能を有している。
(Steel material for introducing tension)
FIG. 3 is an explanatory view showing a state in which the tension-introducing steel material 4 according to the present embodiment is installed in the box opening portion 21. As shown in FIG. 3, the steel material 4 for tension introduction of the connection structure 1 according to the present embodiment is a PC steel material in which a screw 41 is threaded at both ends of a PC steel rod 40 and nuts 41 are screwed. By tightening, it has a function of imparting tension between the precast reinforced concrete floor slabs 2.

図3に示すように、緊張力導入用鋼材4は、PC鋼棒40の両端のナット41部分が、連結して一体化する2枚のプレキャスト鉄筋コンクリート床版2のそれぞれの箱抜き部21に跨って収容されている。また、各箱抜き部21の端部側の中央付近には、端部側面から外部に貫通し、PC鋼棒40の外径より大きく、ナット41の外径より小さい径の貫通孔(図示せず)が穿設されており、その貫通孔にPC鋼棒40が挿通されて緊張力導入用鋼材4が設置されている。このため、2つのナット41をそれぞれ回動させて2つのナット41が近づく方向へ締め付けることにより、各箱抜き部21の当該貫通孔を介してナット41の支圧力の反力が緊張力導入用鋼材4に伝達されて、一体化する2枚のプレキャスト鉄筋コンクリート床版2間に緊張力が付与される仕組みとなっている。   As shown in FIG. 3, the tension-introducing steel material 4 has the nuts 41 at both ends of the PC steel bar 40 straddling the box opening portions 21 of the two precast reinforced concrete floor slabs 2 that are connected and integrated. Is contained. Further, in the vicinity of the center on the end side of each box opening portion 21, a through-hole (not shown) having a diameter larger than the outer diameter of the PC steel rod 40 and smaller than the outer diameter of the nut 41 is penetrated from the end side surface to the outside. )), And a steel steel 4 for tension introduction is installed by inserting a PC steel rod 40 through the through-hole. For this reason, by rotating the two nuts 41 and tightening the two nuts 41 closer to each other, the reaction force of the support pressure of the nuts 41 is introduced for the tension force through the through hole of each box opening portion 21. The tension is applied between the two precast reinforced concrete floor slabs 2 transmitted to and integrated with the steel material 4.

次に、図1〜図3を用いて、本発明の第1実施形態に係るプレキャスト構造部材と経時硬化材の連結構造の構築方法について説明する。   Next, the construction method of the connection structure of the precast structural member and the time-curing material according to the first embodiment of the present invention will be described with reference to FIGS.

(1)プレキャスト構造部材設置工程
先ず、本連結構造1の構築方法では、鋼桁などの橋桁上の所定の位置に、プレキャスト構造部材である前述の複数のプレキャスト鉄筋コンクリート床版2を敷き並べるプレキャスト構造部材設置工程を行う。図2に示すように、連結する2枚のプレキャスト鉄筋コンクリート床版2の間が、目地部Aとなる。
(1) Precast structural member installation step First, in the construction method of the present connection structure 1, a precast structure in which the plurality of precast reinforced concrete slabs 2 as precast structural members are laid out at predetermined positions on a bridge girder such as a steel girder. A member installation process is performed. As shown in FIG. 2, the joint A is between the two precast reinforced concrete floor slabs 2 to be connected.

(2)緊張力導入用鋼材設置工程
次に、本連結構造1の構築方法では、図3に示すように、一定間隔をおいて形成された対向する箱抜き部21に緊張力導入用鋼材4の長手方向の端部をそれぞれ設置する緊張力導入用鋼材設置工程を行う。
(2) Tensile Strength Introducing Steel Material Installation Step Next, in the construction method of the present connecting structure 1, as shown in FIG. 3, the tension force introducing steel material 4 is placed on the opposing box opening portions 21 formed at regular intervals. The steel material installation process for tension | tensile_strength introduction which installs the edge part of the longitudinal direction of each is performed.

(3)緊張力付与工程
次に、本連結構造1の構築方法では、図3に示す緊張力導入用鋼材4のナット41をそれぞれ回動させて締め付けることにより、一体化する2枚のプレキャスト鉄筋コンクリート床版2間に緊張力を付与する緊張力付与工程を行う。
(3) Tensile force application step Next, in the construction method of the present connecting structure 1, two precast reinforced concretes are integrated by rotating and tightening the nut 41 of the steel material 4 for tension introduction shown in FIG. A tension applying step for applying tension between the floor slabs 2 is performed.

このとき付与する緊張力は、ナット41を締め付けてもプレキャスト鉄筋コンクリート床版2が不動であるか、又は微動した直後に締め付けを止めることで付与される、プレキャスト鉄筋コンクリート床版2の自重による橋桁との静止摩擦力以内の緊張力である。   The tension force applied at this time is that the precast reinforced concrete floor slab 2 does not move even if the nut 41 is tightened, or is applied by stopping the tightening immediately after the fine movement, and the bridge girder due to the weight of the precast reinforced concrete floor slab 2 is given. Tension force within static friction force.

何故なら、現場打ちの部分と既設のプレキャスト部材との打ち継ぎのひび割れを抑制する緊張力としては、前述の静止摩擦力以内の緊張力で充分足りるとともに、プレキャスト鉄筋コンクリート床版2を固定する手間が省けるからである。   This is because the tension within the static friction force is sufficient as the tension that suppresses the cracking of the joint between the part cast on site and the existing precast member, and the effort to fix the precast reinforced concrete floor slab 2 is sufficient. Because it can be omitted.

なお、鋼桁と合成するスタッドジベルにモルタルブロックなどのブロック状の物体を噛ましたり、床版端部の目地部に楔を噛ますなどしたりしてプレキャスト鉄筋コンクリート床版2をブロックや楔などの掛止部材で掛け止めてズレにくくして緊張力を付与してもよい。その場合は、掛止部材を噛ます手間が増えるものの、プレキャスト鉄筋コンクリート床版2,2間に係る緊張力を増加させることができ、ひび割れ抑制効果を高めることができる。   In addition, the precast reinforced concrete floor slab 2 can be blocked, wedged, etc. by biting a block-shaped object such as a mortar block with a stud gibber to be combined with a steel girder, or biting a wedge with a joint at the edge of the floor slab. The tension member may be provided with tension by making it difficult to shift by latching with the latch member. In that case, although the effort which bites a latching member increases, the tension | tensile_strength force concerning the precast reinforced concrete floor slabs 2 and 2 can be increased, and the crack suppression effect can be heightened.

但し、その場合でも掛止部材を取り外すような付与した緊張力を緩めるリリース工程を有していない。このため、新たに打設する経時硬化材3にはプレストレスは作用しないものの、プレキャスト構造部材間には、プレストレスが作用し、プレキャスト構造部材と経時硬化材の連結部分のひび割れ耐力を向上することができる。勿論、貫通ボルトや何らかの機械装置等でプレキャスト鉄筋コンクリート床版2を完全に固定して高いプレストレスを付与することも可能である。   However, even in that case, it does not have a release process for loosening the applied tension that removes the latching member. For this reason, although prestress does not act on the time-hardening material 3 to be newly placed, prestress acts between the precast structural members and improves the cracking resistance of the connecting portion between the precast structural member and the time-hardened material. be able to. Of course, high prestress can be applied by completely fixing the precast reinforced concrete floor slab 2 with a through bolt or some mechanical device.

(4)打設工程
次に、本連結構造1の構築方法では、目地部Aの下面及び側面に型枠を設置して前述の経時硬化材3としてコンクリートを流し込んで打設する打設工程を行う。そして、一定時間が経過して経時硬化材3が所定の強度が発現した後、型枠を脱型して図1に示す連結構造1の構築が完了する。勿論、目地部Aが橋桁や他の構造物上となり型枠が不要な場合は、設置しなくてもよいことは云うまでもない。
(4) Placing process Next, in the construction method of the present connecting structure 1, a casting process in which a mold is installed on the lower surface and the side surface of the joint portion A, and concrete is poured as the above-described time-hardening material 3, and the casting process is performed. Do. Then, after a predetermined time has elapsed, the time-curing material 3 exhibits a predetermined strength, and then the mold is removed from the mold to complete the construction of the connection structure 1 shown in FIG. Of course, if the joint A is on a bridge girder or other structure and no formwork is required, it goes without saying that it need not be installed.

以上説明した本発明の第1実施形態に係るプレキャスト構造部材と経時硬化材の連結構造及びその構築方法によれば、プレキャスト鉄筋コンクリート床版2の目地部A周りのひび割れ耐力を向上することができる。このため、ひび割れから雨水等が浸食して内部補強鉄筋等が腐食するおそれが少なくなり、構造体の耐久性を向上させることができる。また、コンクリートなどの経時硬化材を2度打ちする必要がなくなり、作業手順や養生期間を削減して施工期間を短縮することができる。   According to the connection structure of the precast structural member and the time-hardening material and the construction method thereof according to the first embodiment of the present invention described above, the cracking resistance around the joint portion A of the precast reinforced concrete floor slab 2 can be improved. For this reason, there is less possibility that rainwater or the like erodes from cracks and the internal reinforcing steel bars or the like corrode, and the durability of the structure can be improved. In addition, it is not necessary to strike a time-hardening material such as concrete twice, so that the work procedure and the curing period can be reduced to shorten the construction period.

[第2実施形態]
次に、図4〜図11を用いて、本発明の第2実施形態に係るプレキャスト構造部材と経時硬化材の連結構造1’について説明する。本実施形態に係る連結構造1’は、特許文献2に記載のプレキャスト床版の目地構造と略同構成であり、前述の第1実施形態に係る連結構造1と相違する点は、主に、箱抜き部21に相当する部分に、後述の埋設金具が設けられている点なので、その点を説明し、他の説明を省略する。
[Second Embodiment]
Next, the connection structure 1 ′ of the precast structural member and the time-curing material according to the second embodiment of the present invention will be described with reference to FIGS. The connection structure 1 ′ according to the present embodiment is substantially the same configuration as the joint structure of the precast floor slab described in Patent Document 2, and the difference from the connection structure 1 according to the first embodiment described above is mainly, Since a buried metal fitting described later is provided in a portion corresponding to the box opening portion 21, this point will be described and other description will be omitted.

本実施形態に係る連結構造1’は、プレキャスト構造部材として後述の複数の埋設金具5が埋設された2枚のプレキャスト鉄筋コンクリート床版2’,2’と、これらの2枚のプレキャスト鉄筋コンクリート床版2’,2’間に形成された隙間である目地部A’及び埋設金具5の上面に打設された経時硬化材3’と、埋設金具5と嵌合してプレキャスト鉄筋コンクリート床版2,2を連結する嵌合金具6など、から構成されている。   The connecting structure 1 ′ according to the present embodiment includes two precast reinforced concrete floor slabs 2 ′ and 2 ′ in which a plurality of below-described embedded metal fittings 5 are embedded as precast structural members, and these two precast reinforced concrete floor slabs 2. The joint A is a gap formed between “, 2” and the time-hardening material 3 ′ placed on the upper surface of the embedded metal fitting 5, and the precast reinforced concrete floor slabs 2, 2 are fitted with the embedded metal fitting 5. It is comprised from the fitting metal fitting 6 etc. which connect.

(プレキャスト構造部材)
本実施形態に係るプレキャスト構造部材であるプレキャスト鉄筋コンクリート床版2’は、図2に示した前述のプレキャスト鉄筋コンクリート床版2と略同構成の床版であり、相違する点は、接合する端部付近に図4〜図6に示す埋設金具5が埋設されている点である。
(Precast structural member)
A precast reinforced concrete floor slab 2 'which is a precast structural member according to the present embodiment is a floor slab having substantially the same configuration as the above-mentioned precast reinforced concrete floor slab 2 shown in FIG. The point is that the embedded metal fitting 5 shown in FIGS. 4 to 6 is embedded.

図4は、本実施形態に係る連結構造1’の埋設金具5を示す斜視図であり、図5は、埋設金具5の平面図、図6は、図5のX−X線断面図である。図4〜図6に示すように、本実施形態に係る埋設金具5は、金具本体50と、この金具本体50を床版に定着させる定着部51など、から構成されている。この埋設金具5は、前述の箱抜き部に相当する部分に埋設され、金具本体50の上面だけが箱抜き部から露出した状態となっている。   4 is a perspective view showing the embedded metal fitting 5 of the connection structure 1 ′ according to the present embodiment, FIG. 5 is a plan view of the embedded metal fitting 5, and FIG. 6 is a sectional view taken along line XX in FIG. 5. . As shown in FIGS. 4 to 6, the embedded metal fitting 5 according to the present embodiment includes a metal fitting body 50 and a fixing unit 51 for fixing the metal fitting body 50 to the floor slab. The embedded metal fitting 5 is embedded in a portion corresponding to the above-described box opening portion, and only the upper surface of the metal fitting body 50 is exposed from the box opening portion.

この金具本体50は、嵌合金具6と嵌合する嵌合凹部52を有する金属製の金具であり、嵌合金具6と協働してプレキャスト鉄筋コンクリート床版2’を連結する機能を有している。この嵌合凹部52は、図4、図5に示すように、連結方向の端部中央にスリット53が形成された平面視でC字状となった凹部である。また、この嵌合凹部52のスリット53の両脇の内面は、上方に行くに従って凹部が広くなるようにテーパー状に形成されたテーパー面54となっている。   The metal fitting body 50 is a metal metal fitting having a fitting recess 52 for fitting with the fitting metal fitting 6, and has a function of connecting the precast reinforced concrete floor slab 2 ′ in cooperation with the fitting metal fitting 6. Yes. As shown in FIGS. 4 and 5, the fitting recess 52 is a C-shaped recess in plan view in which a slit 53 is formed at the center of the end in the connecting direction. Further, the inner surfaces on both sides of the slit 53 of the fitting recess 52 are tapered surfaces 54 formed in a tapered shape so that the recess becomes wider as going upward.

そして、嵌合凹部52の底面中央付近には、後述の止付けボルトB1と螺合するボルト孔55が穿設されている。このボルト孔55には、止付けボルトB1と螺合する雌ねじが形成されている。   In the vicinity of the center of the bottom surface of the fitting recess 52, a bolt hole 55 that is screwed with a later-described fastening bolt B1 is formed. The bolt hole 55 is formed with a female screw that is screwed with the fastening bolt B1.

定着部51は、金具本体50の連結する側と反対側の面(背面)に突設された2本の角棒状の部位であり、プレキャスト鉄筋コンクリート床版2’のコンクリートと付着力を高めるため複数のリブ56が形成されている。図示形態では、金具本体50と反対側の先端部57が連結された形状となっている。   The fixing portion 51 is a two-sided rod-shaped portion projecting on the surface (back surface) opposite to the side to which the metal fitting body 50 is connected, and a plurality of fixing portions 51 are provided to increase the adhesion between the precast reinforced concrete floor slab 2 ′ and the concrete. The rib 56 is formed. In the illustrated form, the tip 57 on the opposite side of the metal fitting body 50 is connected.

なお、符号58は、嵌合凹部52と嵌合金具6とがズレないようにするためのズレ防止リブであり、符号59は、経時硬化材3’の打設時に嵌合凹部52から嵌合金具6が浮き上がっては外れないようにするための楔用の孔である。   Reference numeral 58 denotes a misalignment prevention rib for preventing the fitting recess 52 and the fitting 6 from being misaligned, and reference numeral 59 denotes a fitting metal from the fitting recess 52 when the time-curing material 3 ′ is placed. It is a wedge hole for preventing the tool 6 from being lifted off.

(緊張力導入用鋼材)
図7は、本実施形態に係る連結構造1’の嵌合金具6を示す斜視図であり、図8は、嵌合金具6の平面図、図9は、嵌合金具6の側面図である。図7〜図9に示すように、本実施形態に係る緊張力導入用鋼材である嵌合金具6は、前述の嵌合凹部52と嵌合する平面視D字状の左右一対の嵌合部60が形成され、前述のスリット53に相当する連結部61で左右の嵌合部60が連結した平面視で眼鏡状となった金具である。
(Steel material for introducing tension)
FIG. 7 is a perspective view showing the fitting fitting 6 of the connecting structure 1 ′ according to the present embodiment, FIG. 8 is a plan view of the fitting fitting 6, and FIG. 9 is a side view of the fitting fitting 6. . As shown in FIG. 7 to FIG. 9, the fitting 6 which is a steel material for tension introduction according to the present embodiment is a pair of left and right fitting parts having a D-shape in a plan view and fitting with the fitting recess 52 described above. 60 is formed, and is a metal fitting in the shape of glasses in a plan view in which the right and left fitting parts 60 are connected by a connecting part 61 corresponding to the slit 53 described above.

この嵌合金具6の嵌合部60は、図7、図9に示すように、左右の両端部分が止付けボルトB1を装着するボルト孔62となっており、その周りの高さが低く、テーパー面54側が平面視でH字状に高く段違い形状となっている。また、嵌合部60同士の間隔は、下に行くに従って広くなるようにテーパー面63となっている。このため、嵌合金具6を埋設金具5の嵌合凹部52に嵌め込んで下方に押し付けるに従って、テーパー面54とテーパー面63の係合により、連結するプレキャスト鉄筋コンクリート床版2’同士が引き寄せられる方向に嵌合金具6の連結部61に緊張力が働く仕組みとなっている。   As shown in FIGS. 7 and 9, the fitting portion 60 of the fitting 6 has bolt holes 62 in which the left and right end portions are fitted with the fastening bolts B <b> 1. The tapered surface 54 side has a stepped shape that is high in an H shape in plan view. Further, the interval between the fitting portions 60 is a tapered surface 63 so as to increase as it goes downward. For this reason, the direction in which the precast reinforced concrete floor slabs 2 ′ to be connected are drawn together by the engagement of the tapered surface 54 and the tapered surface 63 as the fitting metal fitting 6 is fitted into the fitting recess 52 of the embedded metal fitting 5 and pressed downward. The tension force acts on the connecting portion 61 of the fitting 6.

なお、符号64は、ズレ防止リブ58と係合してズレを防止するズレ防止溝である。   Reference numeral 64 denotes a shift prevention groove that engages with the shift prevention rib 58 to prevent the shift.

次に、図10、図11を用いて、第2実施形態に係る連結構造1’の構築方法について説明する。第1実施形態に係る連結構造1の構築方法と相違する点を主に説明し、その他の説明は省略する。図10は、2つの埋設金具5,5に嵌合金具6を嵌合させた状態を示す平面図、図11は、図10のY−Y線鉛直断面図であり、(a)が嵌合金具6の装着前、(b)が嵌合金具6の装着後の状態を示している。なお、図11は、埋設金具5と嵌合金具6のみを示し、プレキャスト鉄筋コンクリート床版2’等を省略している。   Next, the construction method of the connection structure 1 ′ according to the second embodiment will be described with reference to FIGS. 10 and 11. Differences from the construction method of the connection structure 1 according to the first embodiment will be mainly described, and other descriptions will be omitted. 10 is a plan view showing a state in which the fitting metal fitting 6 is fitted to the two embedded metal fittings 5 and 5, FIG. 11 is a vertical cross-sectional view taken along line YY of FIG. 10, and FIG. Before the fitting 6 is mounted, (b) shows the state after the fitting 6 is mounted. FIG. 11 shows only the buried metal fitting 5 and the fitting metal fitting 6 and omits the precast reinforced concrete floor slab 2 'and the like.

(1)プレキャスト構造部材設置工程
先ず、本連結構造1’の構築方法では、第1実施形態に係る連結構造1の構築方法と同様に、鋼桁などの橋桁上の所定の位置に、プレキャスト構造部材である前述の複数のプレキャスト鉄筋コンクリート床版2’を敷き並べるプレキャスト構造部材設置工程を行う。
(1) Precast structural member installation process First, in the construction method of this connection structure 1 ′, the precast structure is placed at a predetermined position on a bridge girder such as a steel girder, similarly to the construction method of the connection structure 1 according to the first embodiment. A precast structural member installation step of laying out the plurality of precast reinforced concrete floor slabs 2 'as members is performed.

但し、図10、図11に示すように、連結する2枚のプレキャスト鉄筋コンクリート床版2’、2’の間の隙間である目地部A’は、図2等で示した目地部Aより間隔がかなり狭くなっている。   However, as shown in FIG. 10 and FIG. 11, the joint portion A ′, which is a gap between the two precast reinforced concrete floor slabs 2 ′ and 2 ′ to be connected, is spaced from the joint portion A shown in FIG. It is quite narrow.

(2)嵌合金具装着工程
次に、本連結構造1’の構築方法では、図10、図11に示すように、対向する前述の埋設金具5の2つの嵌合凹部52に嵌合金具6の嵌合部60を嵌合させて埋設金具5に嵌合金具6を装着する嵌合金具装着工程を行う。
(2) Fitting fitting mounting process Next, in the construction method of the present connecting structure 1 ′, as shown in FIGS. 10 and 11, the fitting fitting 6 is inserted into the two fitting recesses 52 of the above-mentioned buried fitting 5 facing each other. A fitting fitting mounting step of fitting the fitting fitting 6 to the buried fitting 5 by fitting the fitting portion 60 is performed.

本工程では、先ず、対向する埋設金具5の2つの嵌合凹部52に、嵌合部60の下端を嵌め込んで嵌合金具6を載置する。そして、止付けボルトB1をボルト孔62に差し込んで、埋設金具5のボルト孔55にねじ込むことで、テーパー面54とテーパー面63を係合させて、緊張力を高めていく。本工程では、プレキャスト鉄筋コンクリート床版2’が動き出す直前、又は直後まで止付けボルトB1をボルト孔55にねじ込んでいく。また、必要に応じて、経時硬化材3’の打設時に嵌合凹部52から嵌合金具6が浮き上がっては外れないようにするために楔Cを楔用の孔59に差し込んで固定する。   In this process, first, the fitting metal fitting 6 is placed by fitting the lower end of the fitting portion 60 into the two fitting recesses 52 of the buried metal fitting 5 facing each other. Then, the fastening bolt B1 is inserted into the bolt hole 62 and screwed into the bolt hole 55 of the embedded metal fitting 5, whereby the tapered surface 54 and the tapered surface 63 are engaged to increase the tension force. In this step, the fastening bolt B1 is screwed into the bolt hole 55 until just before or just after the precast reinforced concrete floor slab 2 'starts to move. Further, if necessary, the wedge C is inserted into the wedge hole 59 and fixed so that the fitting 6 is not lifted off from the fitting recess 52 when the time-hardening material 3 ′ is placed.

このように、本連結構造1’の構築方法では、前述の連結構造1の構築方法の(2)緊張力導入用鋼材設置工程と(3)緊張力付与工程とを、略同時に行うことができる。このため、緊張力付与工程を短縮することができ、連結構造1’の構築作業を短縮してコストダウンを達成することができる。   Thus, in the construction method of the present connecting structure 1 ′, the (2) tension introduction steel material installation step and (3) the tension applying step of the above-described construction method of the coupling structure 1 can be performed substantially simultaneously. . For this reason, a tension | tensile_strength provision process can be shortened, the construction work of connection structure 1 'can be shortened, and cost reduction can be achieved.

その上、複数の埋設金具5と嵌合金具6を同時に装着することも容易であり、各連結部分の緊張力の導入が均一となるばかりでなく、床版同士全体の緊張力が均一とすることが容易であり、さらに構造体の耐久性を向上させることができる。   In addition, it is easy to attach a plurality of buried metal fittings 5 and fitting metal fittings 6 at the same time, and not only the introduction of the tension force of each connecting portion is uniform, but also the tension force of the entire floor slab is uniform. And durability of the structure can be improved.

(3)打設工程
次に、本連結構造1’の構築方法では、前述の連結構造1の構築方法と同様に、目地部A’の下面及び側面に型枠を設置して経時硬化材3’を流し込んで打設する打設工程を行う。そして、一定時間が経過して経時硬化材3’が所定の強度が発現した後、型枠を脱型して図1に示す連結構造1の構築が完了する。
(3) Placing Step Next, in the method for constructing the present connecting structure 1 ′, as with the method for constructing the connecting structure 1 described above, the time-curing material 3 is formed by installing a mold on the lower surface and side surface of the joint portion A ′. Casting process is performed by casting '. Then, after a predetermined time has elapsed, the time-curing material 3 ′ exhibits a predetermined strength, and then the mold is removed from the mold to complete the construction of the connection structure 1 shown in FIG.

ここで、経時硬化材3’は、前述の経時硬化材3と同様であるが、目地部A’が狭いので、無収縮モルタルや、それより流動性の高いグラウトが好ましい。また、目地部A’が狭く、経時硬化材3’の必要量が少なくて済むため、単価の高い早強セメントを含有した早強モルタル等を使用してさらなる工期短縮を図ることも可能である。   Here, the time-curing material 3 ′ is the same as the time-curing material 3 described above, but since the joint portion A ′ is narrow, a non-shrink mortar or a grout having higher fluidity is preferable. Further, since the joint portion A ′ is narrow and the required amount of the time-hardening material 3 ′ is small, it is possible to further shorten the work period by using a high-strength mortar containing a high-priced high-strength cement. .

なお、従来の特許文献2に記載のプレキャスト床版の目地構造の構築方法では、目地部A’にグラウト等を充填して強度が発現した後、埋設金具5に嵌合金具6を装着し、その後、埋設金具5等の防錆のため、埋設金具5の上面の箱抜き部にコンクリート等を打設していた。このため、グラウトやコンクリートが固まるまでの養生期間が二重に必要であり、工期の長期化の要因となっていた。   In addition, in the construction method of the joint structure of the precast floor slab described in the conventional Patent Document 2, the joint portion A ′ is filled with grout or the like to develop strength, and then the fitting member 6 is attached to the embedded member 5. After that, in order to prevent rusting of the buried metal fitting 5 or the like, concrete or the like was placed on the box opening portion on the upper surface of the buried metal fitting 5. For this reason, a double curing period is required until the grout and concrete are hardened, which has been a factor in lengthening the construction period.

第2実施形態に係る連結構造1’の構築方法によれば、プレキャスト鉄筋コンクリート床版2’の目地部A周りのひび割れ耐力を向上することができるだけでなく、従来必要であったコンクリートなどの経時硬化材を2度打ちする必要がなくなり、作業手順や養生期間を削減して施工期間を短縮することができる。   According to the construction method of the connecting structure 1 ′ according to the second embodiment, not only can the cracking resistance around the joint portion A of the precast reinforced concrete floor slab 2 ′ be improved, but also the time-hardening of concrete or the like that has been conventionally required. There is no need to strike the material twice, and the work procedure and the curing period can be reduced to shorten the construction period.

[第3実施形態]
次に、図12、図13を用いて、本発明の第3実施形態に係るプレキャスト構造部材と経時硬化材の連結構造1”について説明する。本実施形態に係る連結構造1”は、本発明を断面修復の補修部分の現場打ち経時硬化材とプレキャスト構造部材との連結構造に適用した場合である。
[Third Embodiment]
Next, a connection structure 1 ″ of the precast structural member and the time-curing material according to the third embodiment of the present invention will be described with reference to FIGS. 12 and 13. The connection structure 1 ″ according to the present embodiment is the present invention. Is applied to the connection structure of the in-situ time-hardening material and the precast structural member in the repair portion of the cross-sectional repair.

図12は、第3実施形態に係る連結構造1”の構成を示す鉛直断面図であり、図13は、連結構造1”のプレキャスト鉄筋コンクリート床版2”の修復前を示す鉛直断面図である。図12に示すように、本実施形態に係る連結構造1”は、プレキャスト構造部材として例示するプレキャスト鉄筋コンクリート床版2”と、断面修復部分である凹部A”に充填した経時硬化材3”と、この凹部A”の側面同士を繋ぐ緊張力導入用鋼材4”など、から構成されている。   FIG. 12 is a vertical cross-sectional view showing the configuration of the connecting structure 1 ″ according to the third embodiment, and FIG. 13 is a vertical cross-sectional view showing the precast reinforced concrete floor slab 2 ″ of the connecting structure 1 ″ before repair. As shown in FIG. 12, the connection structure 1 ″ according to the present embodiment includes a precast reinforced concrete floor slab 2 ″ exemplified as a precast structural member, and a time-hardening material 3 ″ filled in a recess A ″ that is a cross-sectional repair portion, It is comprised from the steel material 4 '' for tension | tensile_strength introduction | transduction which connects the side surfaces of this recessed part A ".

(プレキャスト構造部材)
本実施形態に係るプレキャスト鉄筋コンクリート床版2”は、図2に示した前述のプレキャスト鉄筋コンクリート床版2と略同構成の床版であり、相違する点は、図13に示すように、床版の下面に劣化部分Bがある点である。プレキャスト鉄筋コンクリート床版2”は、後述のように、劣化部分Bが取り除かれて撤去され、凹部A”が形成されている。
(Precast structural member)
The precast reinforced concrete floor slab 2 ″ according to this embodiment is a floor slab having substantially the same configuration as the above-described precast reinforced concrete floor slab 2 shown in FIG. The lower surface has a deteriorated portion B. As described later, the precast reinforced concrete floor slab 2 ″ is removed by removing the deteriorated portion B to form a recess A ″.

(経時硬化材)
そして、この凹部A”に経時硬化材3”が充填される。この経時硬化材3”は、前述の経時硬化材3と同様であるが、下面に充填するので、所定の粘度を有しモルタルが好ましい。
(Aging material)
The recess A ″ is filled with the time-hardening material 3 ″. This time-curing material 3 ″ is the same as the above-mentioned time-curing material 3, but since it fills the lower surface, a mortar having a predetermined viscosity is preferable.

(緊張力導入用鋼材)
また、この凹部A”の内側面には、ケミカルアンカーやホールインアンカーなどの後施工アンカーA1が設置され、これらの後施工アンカーA1同士を接続する緊張力導入用鋼材として、全ねじボルト41”とターンバックル42”が装着されている。
(Steel material for introducing tension)
Further, a post-installed anchor A1 such as a chemical anchor or a hole-in anchor is installed on the inner side surface of the recess A ″, and a full screw bolt 41 ″ is used as a steel for introducing a tension force for connecting these post-installed anchors A1 to each other. And turnbuckle 42 "is attached.

次に、図14〜図16、図12を用いて、第3実施形態に係る連結構造1”の構築方法について説明する。図14は、第3実施形態に係る連結構造1”の構築方法の劣化部分撤去工程を示す工程説明図である。   Next, the construction method of the connection structure 1 ″ according to the third embodiment will be described with reference to FIGS. 14 to 16 and FIG. 12. FIG. 14 illustrates the construction method of the connection structure 1 ″ according to the third embodiment. It is process explanatory drawing which shows a degradation part removal process.

(1)劣化部分撤去工程
先ず、本連結構造1’の構築方法では、図13に示した劣化部分Bを斫り機等で斫り取って撤去し、図14に示す凹部A”を形成する劣化部分撤去工程を行う。
(1) Deterioration part removal process First, in the construction method of this connection structure 1 ', the deterioration part B shown in FIG. 13 is scraped off and removed by a scraper or the like to form a recess A "shown in FIG. Deteriorated part removal process is performed.

(2)アンカー設置工程
図15は、連結構造1”の構築方法のアンカー設置工程を示す工程説明図である。
次に、図15に示すように、本連結構造1’の構築方法では、前工程で形成した凹部A”の対向する内側面に削孔機等で一直線状に対向する2つの孔を削孔した後、薬剤カプセルやホールインアンカーなどを打ち込んで後施工アンカーA1をそれぞれ設置する。
(2) Anchor Installation Process FIG. 15 is a process explanatory diagram showing an anchor installation process of the method for constructing the connecting structure 1 ″.
Next, as shown in FIG. 15, in the construction method of the present connecting structure 1 ′, two holes that are opposed to each other in a straight line with a hole drilling machine or the like are drilled on the inner surface facing the concave portion A ″ formed in the previous step. After that, a post-construction anchor A1 is installed by driving a drug capsule, a hole-in anchor, or the like.

(3)緊張力導入用鋼材設置工程
図16は、連結構造1”の構築方法の緊張力導入用鋼材設置工程及び緊張力付与工程を示す工程説明図である。
次に、図16に示すように、本連結構造1’の構築方法では、緊張力導入用鋼材を設置する設置工程を行う。本工程では、緊張力導入用鋼材として前工程で設置した後施工アンカーA1に螺合する2本の全ねじボルト41”を装着し、それらを繋ぐターンバックル42”を取り付ける。
(3) Steel Material Installation Step for Introducing Tension Force FIG. 16 is a process explanatory diagram illustrating a steel material installation step for tension force introduction and a tension force application step in the method for constructing the connecting structure 1 ″.
Next, as shown in FIG. 16, in the construction method of the present connecting structure 1 ′, an installation step of installing a steel material for introducing tension is performed. In this step, two full screw bolts 41 "that are screwed into the post-construction anchor A1 installed in the previous step as a steel for introducing tension are attached, and a turnbuckle 42" that connects them is attached.

(4)緊張力付与工程
次に、本連結構造1”の構築方法では、前工程で装着したターンバックル42”を回転させて、図16の矢印で示すように、プレキャスト鉄筋コンクリート床版2”の凹部A”間に緊張力を付与する緊張力付与工程を行う。
(4) Tensile force application step Next, in the construction method of the present connecting structure 1 ″, the turnbuckle 42 ″ attached in the previous step is rotated, and as shown by the arrow in FIG. 16, the precast reinforced concrete floor slab 2 ″ A tension applying step for applying tension between the recesses A ″ is performed.

(5)打設工程
次に、本連結構造1”の構築方法では、凹部A”にモルタル等の経時硬化材3”を打設・充填する打設工程を行う。勿論、凹部A”の下面に型枠を設置してグラウトやモルタルを打設・充填してもよいことは云うまでもない。
(5) Placing Step Next, in the construction method of the present connecting structure 1 ″, the casting step of placing and filling the time-curing material 3 ″ such as mortar into the concave portion A ″ is performed. Of course, the lower surface of the concave portion A ″ Needless to say, a mold may be installed and grout or mortar may be placed and filled.

以上説明した本実施形態に係る連結構造1”の構築方法でも、緊張力付与工程で付与した緊張力を緩めるリリース工程を有していない。このため、新たに打設する経時硬化材3”にはプレストレスは作用しないものの、プレキャスト構造部材間には、プレストレスが作用し、プレキャスト構造部材と経時硬化材の連結部分となる補修部分(凹部A”)のひび割れ耐力を向上させることができる。   Even the construction method of the connecting structure 1 ″ according to the present embodiment described above does not have a release step of relaxing the tension applied in the tension applying step. For this reason, the time-curing material 3 ″ to be newly placed is used. Although no prestress acts, prestress acts between the precast structural members, and the cracking resistance of the repaired portion (recessed portion A ″) that becomes the connecting portion between the precast structural member and the time-curing material can be improved.

なお、本実施形態に係る緊張力導入用鋼材としてターンバックル42”を例示したが、緊張力導入用鋼材の変形例として、図17に示すように、全ねじボルトの設置高さを互い違いにするとともに、全ねじボルトの先端同士をブロック鋼材で結合し、ナットで締め付け可能に構成してもよい。   In addition, although turnbuckle 42 '' was illustrated as steel material for tension | tensile_strength introduction which concerns on this embodiment, as shown in FIG. 17, as the modification of steel material for tension | tensile_strength introduction, the installation height of all the screw bolts is made staggered. At the same time, the ends of all screw bolts may be coupled with a block steel material and tightened with a nut.

また、図18に示すように、全ねじボルトの代わりにボタンヘッドのある鋼材を設置して、ねじを回して緊張力を導入する構成としてもよい。要するに、プレキャスト構造部材であるプレキャスト鉄筋コンクリート床版2”の凹部A”間に緊張力を導入することのできる構成であればよい。   Moreover, as shown in FIG. 18, it is good also as a structure which installs the steel material with a button head instead of all the screw bolts, and introduce | transduces tension | tensile_strength by turning a screw | thread. In short, any configuration may be used as long as tension can be introduced between the recesses A ″ of the precast reinforced concrete floor slab 2 ″ which is a precast structural member.

第3実施形態に係る連結構造1”の構築方法によれば、プレキャスト鉄筋コンクリート床版2”の断面修復部分のひび割れ耐力を向上することができ、作業手順や養生期間を削減して施工期間を短縮することができる。また、従来、剥落等のおそれが高い断面修復部分にプレストレスを掛けることができ、耐久性が大幅に向上する。   According to the construction method of the connecting structure 1 ″ according to the third embodiment, the cracking strength of the cross-section repaired portion of the precast reinforced concrete floor slab 2 ″ can be improved, and the work procedure and the curing period are reduced to shorten the construction period. can do. Further, conventionally, prestress can be applied to a cross-sectional repaired portion that is highly likely to be peeled off, and the durability is greatly improved.

以上、本発明の第1〜第3実施形態に係るプレキャスト構造部材と経時硬化材の連結構造及びその構築方法について詳細に説明したが、前述した又は図示した実施形態は、いずれも本発明を実施するにあたって具体化した一実施形態を示したものに過ぎず、これらによって本発明の技術的範囲が限定的に解釈されてはならないものである。   As described above, the connection structure of the precast structural member and the time-curing material and the construction method thereof according to the first to third embodiments of the present invention have been described in detail. However, any of the above-described or illustrated embodiments implements the present invention. It should be understood that the present invention is merely a specific embodiment, and the technical scope of the present invention should not be interpreted in a limited manner.

特に、プレキャスト構造部材としてプレキャスト鉄筋コンクリート床版を例示して説明したが、他のプレキャスト構造部材であってもよいことは云うまでもない。また、プレキャスト構造部材とは、工場等の現場以外の場所で予め作成したプレキャスト部材だけを指すのではなく、現場において後から打設される経時硬化材より先に打設されて既に所定の強度が発現した既設のコンクリート構造体を指すものとして使用している。本発明は、このような既設のコンクリート構造体と後施工の経時硬化材との連結一体化構造には、適用可能である。その場合でも、前記作用効果を奏することは明らかである。   In particular, a precast reinforced concrete floor slab has been described as an example of a precast structural member, but it goes without saying that other precast structural members may be used. In addition, the precast structural member does not only refer to a precast member prepared in advance in a place other than the site such as a factory, but is already casted before the time-curing material to be cast later in the site and has a predetermined strength. It is used to indicate an existing concrete structure where is expressed. The present invention can be applied to such an integrated structure of an existing concrete structure and a post-construction time-hardening material. Even in such a case, it is clear that the above-described effects can be obtained.

1,1’,1” :(プレキャスト構造部材と経時硬化材の)連結構造
2,2’,2” :プレキャスト鉄筋コンクリート床版(プレキャスト構造部材)
21 :箱抜き部
B :劣化部分
A1 :後施工アンカー
3,3’,3” :経時硬化材
4,4” :緊張力導入用鋼材
40 :PC鋼棒
41 :ナット
41” :全ねじボルト
42” :ターンバックル
5 :埋設金具
50 :金具本体
51 :定着部
52 :嵌合凹部
53 :スリット
54 :テーパー面
55 :ボルト孔
56 :リブ
57 :先端部
58 :ズレ防止リブ
59 :楔用の孔
6 :嵌合金具(緊張力導入用鋼材)
60 :嵌合部
61 :連結部
62 :ボルト孔
63 :テーパー面
64 :ズレ防止溝
A,A’ :目地部
A” :凹部
B1 :止付けボルト
C :楔
1, 1 ′, 1 ″: Connection structure (precast structural member and time-hardening material) 2, 2 ′, 2 ″: Precast reinforced concrete floor slab (precast structural member)
21: Boxed portion B: Degraded portion A1: Post-installed anchors 3, 3 ', 3 ": Temporarily hardened material 4, 4": Steel material 40 for tension introduction: PC steel bar 41: Nut 41 ": Full screw bolt 42 ": Turnbuckle 5: Embedded metal fitting 50: Metal fitting body 51: Fixing portion 52: Fitting recess 53: Slit 54: Tapered surface 55: Bolt hole 56: Rib 57: Tip portion 58: Displacement prevention rib 59: Hole for wedge 6: Fitting (steel material for introducing tension)
60: fitting portion 61: connecting portion 62: bolt hole 63: taper surface 64: misalignment prevention grooves A, A ': joint portion A ": concave portion B1: fixing bolt C: wedge

請求項5に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法は、請求項1ないし4のいずれかに記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法において、前記プレキャスト構造部材同士の一方は、プレキャスト鉄筋コンクリート床版であることを特徴とする。   The method for constructing a connection structure between a precast structural member and a time-curing material according to claim 5 is the construction method for a connection structure between a precast structural member and a time-curing material according to any one of claims 1 to 4. One of the members is a precast reinforced concrete floor slab.

請求項7に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法は、プレキャスト構造部材に形成された凹部に経時硬化材を打設してプレキャスト構造部材と経時硬化材を連結一体化するプレキャスト構造部材と経時硬化材の連結構造の構築方法であって、経時硬化材を打設する前に、前記凹部に緊張力を付与する緊張力付与工程を行い、その後、前記凹部に経時硬化材を打設する打設工程を行って、プレキャスト構造部材と経時硬化材を連結一体化することを特徴とする。   The method for constructing a connection structure of a precast structural member and a time-hardening material according to claim 7 is a method of connecting and integrating the precast structural member and the time-hardening material by placing the time-hardening material in a recess formed in the precast structural member. A method for constructing a connection structure between a precast structural member and a time-hardening material, wherein a tension applying step for applying tension to the concave portion is performed before placing the time-hardening material, and then the time-hardening material is applied to the concave portion. It is characterized in that a precast structural member and a time-curing material are connected and integrated by performing a placing step of placing the material.

Claims (10)

プレキャスト構造部材同士の間の目地部に経時硬化材を打設してプレキャスト構造部材と経時硬化材を連結一体化するプレキャスト構造部材と経時硬化材の連結構造の構築方法であって、
経時硬化材を打設する前に、前記目地部に緊張力を付与する緊張力付与工程を行い、その後、前記目地部に経時硬化材を打設する打設工程を行って、プレキャスト構造部材と経時硬化材を連結一体化すること
を特徴とするプレキャスト構造部材と経時硬化材の連結構造の構築方法。
A method for constructing a connection structure between a precast structural member and a time-curing material, in which a time-curing material is placed at a joint between the precast structural members, and the precast structural member and the time-curing material are connected and integrated,
Before placing the time-curing material, perform a tension applying step for imparting tension to the joint, and then perform a placing step for placing the time-curing material on the joint. A method for constructing a connection structure of a precast structural member and a time-hardening material, characterized in that the time-hardening material is connected and integrated.
前記緊張力を緩めるリリース工程を有していないこと
を特徴とすること請求項1に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法。
The method for constructing a connection structure of a precast structural member and a time-hardening material according to claim 1, wherein a release step for relaxing the tension is not provided.
前記緊張力付与工程では、前記プレキャスト構造部材の自重による静止摩擦力以内の緊張力を付与すること
を特徴とする請求項1又は2に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法。
The method for constructing a connection structure between a precast structural member and a time-hardening material according to claim 1 or 2, wherein in the tension applying step, a tensile force within a static friction force due to the weight of the precast structural member is applied. .
前記緊張力付与工程では、ブロックや楔などの掛止部材で前記プレキャスト構造部材を掛け止めて緊張力を付与すること
を特徴とする請求項1又は2に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法。
3. The precast structural member according to claim 1 or 2, wherein in the tension applying step, the precast structural member is hooked with a hooking member such as a block or a wedge to apply the tensile force. How to build a linked structure.
前記プレキャスト構造部材同士の一方は、プレキャスト鉄筋コンクリート床版であること
を特徴とする請求項1ないし4のいずれかに記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法。
One of the said precast structural members is a precast reinforced concrete floor slab. The construction method of the connection structure of the precast structural member and time-hardening material in any one of Claim 1 thru | or 4 characterized by the above-mentioned.
連結する2つの前記プレキャスト鉄筋コンクリート床版の端部付近には、上方に広がるテーパー状の嵌合凹部を有する埋設金具がそれぞれ埋設されており、
前記緊張力付与工程では、連結する2つの前記プレキャスト鉄筋コンクリート床版の両方の嵌合凹部に嵌合する一対の嵌合部を有する嵌合金具を上方から嵌め込むことにより前記プレキャスト鉄筋コンクリート床版間に緊張力を付与すること
を特徴とする請求項5に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法。
In the vicinity of the end portions of the two precast reinforced concrete floor slabs to be connected, embedded metal fittings having tapered fitting recesses extending upward are respectively embedded.
In the tension applying step, by fitting a fitting fitting having a pair of fitting portions fitted into fitting recesses of both of the two precast reinforced concrete floor slabs to be connected between the precast reinforced concrete floor slabs. A method for constructing a connection structure of a precast structural member and a time-hardening material according to claim 5, wherein tension is applied.
プレキャスト構造部材に形成された凹部に経時硬化材を打設してプレキャスト構造部材と経時硬化材を連結一体化するプレキャスト構造部材と経時硬化材の連結構造の構築方法であって、
経時硬化材を打設する前に、前記凹部に緊張力を付与する緊張力付与工程を行い、その後、前記凹部に経時硬化材を打設する打設工程を行って、プレキャスト構造部材と経時硬化材を連結一体化すること
を特徴とするプレキャスト構造部材と経時硬化材の連結構造の構築方法。
A method for constructing a connection structure of a precast structure member and a time-curing material, in which a time-curing material is placed in a recess formed in the precast structure member and the precast structure member and the time-curing material are connected and integrated,
Before placing the time-hardening material, perform a tension applying step for applying tension to the concave portion, and then perform a placing step for placing the time-hardening material in the concave portion. A method for constructing a connection structure of a precast structural member and a time-hardening material, characterized by connecting and integrating the materials.
前記緊張力を緩めるリリース工程を有していないこと
を特徴とすること請求項7に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法。
The method for constructing a connection structure of a precast structural member and a time-hardening material according to claim 7, wherein a release process for loosening the tension is not included.
前記凹部は、プレキャスト構造部材の劣化部分を撤去することにより形成されたこと
を特徴とする請求項7又は8に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法。
The method for constructing a connection structure of a precast structural member and a time-hardening material according to claim 7 or 8, wherein the concave portion is formed by removing a deteriorated portion of the precast structural member.
前記緊張力付与工程では、前記凹部の対向する2つの側壁にそれぞれ埋設された後施工アンカー同士を緊結するターンバックルなどの緊結治具で互いに緊結することにより前記凹部に緊張力を付与すること
を特徴する請求項9に記載のプレキャスト構造部材と経時硬化材の連結構造の構築方法。
In the tension applying step, the tension is applied to the recess by tightening each other with a tightening jig such as a turnbuckle that binds the post-construction anchors embedded in the two opposing side walls of the recess. The construction method of the connection structure of the precast structural member of Claim 9 characterized by the above-mentioned, and a time hardening material.
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