JP4820722B2

JP4820722B2 - Method and structure for joining precast reinforced concrete beam members

Info

Publication number: JP4820722B2
Application number: JP2006243635A
Authority: JP
Inventors: 裕次石川; 博之上田; 信行柳澤; 清志小倉; 栄作河合
Original assignee: Takenaka Corp
Current assignee: Takenaka Corp
Priority date: 2006-09-08
Filing date: 2006-09-08
Publication date: 2011-11-24
Anticipated expiration: 2026-09-08
Also published as: JP2008063846A

Description

この発明は、プレキャスト鉄筋コンクリート（以下適宜、ＰＣａと云う。）梁部材同士の接合方法及び接合構造の技術分野に属し、更に云うと、梁部材同士を水平移動することなく且つ一側壁面から接合作業する方法及び構造に関する。 The present invention belongs to the technical field of joining methods and joining structures of precast reinforced concrete (hereinafter, appropriately referred to as PCa) beam members, and more specifically, joining work from one side wall surface without horizontally moving the beam members. It relates to a method and a structure.

従来、ＰＣａ梁部材同士の接合方法は、図５Ａ、Ｂに示したように、対向するＰＣａ梁部材ａ、ａから突出した鉄筋ｂ、ｂ同士を接合し、その接合部に後打ちコンクリート打設工事等の後工事（図示省略）を行うことが一般的に行われる。因みに鉄筋ｂ、ｂ同士の接合（継手）方法には、圧接継手方法、溶接継手方法、機械式継手方法等が用いられ、前記鉄筋ｂ、ｂ同士を接合する作業を確実に行うという作業上の観点から、ＰＣａ梁部材ａ、ａ同士の間隔Ｌを少なくとも１５０ｃｍ程度確保して行うのが一般的である（例えば、特許文献１の第１図、特許文献２の図４、及び特許文献３の図３参照）。因みに、図５Ａ、ＢではＰＣａ柱部材ｅの上方に複数の柱主筋ｃを突き出した構造形式（串刺し工法等）で構築する実施例を示している。図中の符号ｄは、支保工を示している。 Conventionally, as shown in FIGS. 5A and 5B, the PCa beam members are joined by joining the reinforcing bars b and b projecting from the opposing PCa beam members a and a, and placing a post-cast concrete at the joint. Generally, post-construction work (not shown) is performed. Incidentally, as a method of joining (joining) the reinforcing bars b and b, a pressure welding joint method, a welded joint method, a mechanical joint method, and the like are used, and the work of joining the reinforcing bars b and b reliably is performed. From the viewpoint, it is common to secure the interval L between the PCa beam members a and a at least about 150 cm (for example, see FIG. 1 of Patent Document 1, FIG. 4 of Patent Document 2, and Patent Document 3). (See FIG. 3). 5A and 5B show an embodiment in which a plurality of column main bars c are protruded above the PCa column member e and constructed in a structural form (such as a skewering method). The symbol d in the figure indicates a support work.

しかし、前記従来の接合方法は、ＰＣａ梁部材ａ、ａ同士の間隔を少なくとも１５０ｃｍ程度確保する必要が生じる。したがって、前記鉄筋ｂ、ｂ同士の継手作業終了後に、梁部材ａ、ａ同士の間隔Ｌを埋めるべく、対向するＰＣａ梁部材ａ、ａ同士の接合部近傍にコンクリート打設用の型枠を設置し、コンクリートを打設して前記鉄筋ｂ、ｂ同士の継手部分とＰＣａ梁部材ａ、ａ同士とを一体化させる大掛かりな後工事を行う必要が生じる。よって、工期が長期化し、不経済に過ぎるという問題がある。 However, the conventional joining method needs to secure at least about 150 cm between the PCa beam members a and a. Therefore, after the joint work between the reinforcing bars b and b is completed, a concrete casting mold is installed in the vicinity of the joint between the opposing PCa beam members a and a so as to fill the gap L between the beam members a and a. However, it is necessary to perform a large-scale post-construction work in which concrete is placed to integrate the joint portions of the reinforcing bars b and b with the PCa beam members a and a. Therefore, there is a problem that the construction period is prolonged and too uneconomical.

ところで、図６は、ＰＣａ梁部材ａ、ａ同士の異なる接合方法を示している。この技術は、一方（図示例では左側）のＰＣａ梁部材ａに水平方向にスリーブ継手ｆを埋設し、他方（図示例では右側）のＰＣａ梁部材ａに水平方向に鉄筋ｂを突設させておき、当該他方のＰＣａ梁部材ａを水平方向（図示例では左方向）に移動させて、前記スリーブ継手ｆ内へ挿入し、当該接合部分へグラウトを充填してＰＣａ梁部材ａ、ａ同士の接合作業を行っている（例えば、特許文献４の図３参照）。 By the way, FIG. 6 has shown the joining method from which PCa beam members a and a differ. In this technique, a sleeve joint f is embedded horizontally in one (left side in the illustrated example) PCa beam member a, and a reinforcing bar b is projected horizontally in the other (right side in the illustrated example) PCa beam member a. Then, the other PCa beam member a is moved in the horizontal direction (left direction in the illustrated example), inserted into the sleeve joint f, filled with grout in the joint portion, and the PCa beam members a, a A joining operation is performed (see, for example, FIG. 3 of Patent Document 4).

この図６の接合方法は、ＰＣａ梁部材ａ、ａ同士の間隔を殆ど空けることなく、当該接合部分（隙間）にグラウト充填する程度の作業でＰＣａ梁部材ａ、ａ同士を接合できるので、対向するＰＣａ梁部材ａ、ａ同士の接合部近傍にコンクリート打設用の型枠を設置しコンクリートを打設するなどの大掛かりな後工事は不要である。よって、図５Ａ、Ｂに係る技術と比して、後工事を簡略化させて工期の短縮を図ることができ、経済性に優れているように見える。 In the joining method of FIG. 6, the PCa beam members a and a can be joined to each other by an operation of filling the joint portion (gap) with a grout with almost no space between the PCa beam members a and a. Large-scale post-work such as placing concrete formwork in the vicinity of the joint between the PCa beam members a and a and placing concrete is unnecessary. Therefore, as compared with the technique according to FIGS. 5A and 5B, the post-construction can be simplified and the construction period can be shortened, which seems to be excellent in economy.

特開平３−２１２５３７号公報JP-A-3-212537 特開平５−３４０００３号公報JP-A-5-340003 特開平５−８６６４３号公報JP-A-5-86643 特開２００４−３４６５８７号公報Japanese Patent Application Laid-Open No. 2004-346587

図６（例えば特許文献４）に係る技術は、図５Ａ、Ｂと比して、後工事を簡略化させ工事の短縮化を図ることができる点は認められる。しかし、それは、ＰＣａ梁部材ａの水平方向の移動を許容できる、ＰＣａ柱部材ｅの下方に複数の柱主筋ｃが突き出された構造形式（逆串刺し工法、逆挿し柱等）とされているが故である。 It is recognized that the technique according to FIG. 6 (for example, Patent Document 4) can simplify the post-construction and shorten the construction compared to FIGS. 5A and 5B. However, it is a structural type (reverse skewering method, reverse insertion column, etc.) in which a plurality of column main bars c protrude below the PCa column member e, which can allow the horizontal movement of the PCa beam member a. That's why.

即ち、図５Ａ、Ｂに示したように、ＰＣａ柱部材ｅの上方に複数の柱主筋ｃを突き出した構造形式については、ＰＣａ梁部材ａの水平方向の動きが拘束されるので、図６のＰＣａ梁部材を水平移動させる技術は一切適用できず、依然として大掛かりな後工事を行う必要があり、工期が長期化し、不経済に過ぎるという問題点は解消できないものである。
また、図６では、図の左側のＰＣａ梁部材をまず位置決めした後、図の右側のＰＣａ梁部材を位置決めする。或いは右からはじめて左のＰＣａ梁部材を位置決めする方法で接合されるため、施工順序に大きな制約を受け、工期の長期化の一因ともなっている。 That is, as shown in FIGS. 5A and 5B, the horizontal movement of the PCa beam member a is constrained for the structure type in which a plurality of column main bars c protrude above the PCa column member e. The technique of horizontally moving the PCa beam member cannot be applied at all, and it is still necessary to perform a large-scale post-work, and the problem that the construction period is prolonged and too uneconomical cannot be solved.
In FIG. 6, the PCa beam member on the left side of the drawing is first positioned, and then the PCa beam member on the right side of the drawing is positioned. Or since it joins by the method of positioning the left PCa beam member for the first time from the right, it is greatly restricted by the construction sequence, which is also a cause of the lengthening of the construction period.

ところで、ベランダ等を構築する所謂逆梁部材同士を接合する際、足場等の設置や表面仕上げを接合後に施す必要があり工期に影響するという問題点がある。 By the way, when joining so-called reverse beam members for constructing a veranda or the like, there is a problem in that it is necessary to install a scaffolding or surface finishing after joining, which affects the construction period.

本発明の目的は、ＰＣａ柱部材ｅの下方又は上方に複数の柱主筋ｃを突き出した何れの構造形式においても好適に実施することができ、ＰＣａ梁部材ａ、ａ同士を接合するに当たりＰＣａ梁部材を水平移動させることなく、大掛かりな後工事を飛躍的に簡略化することができ、工期の短縮を実現し、経済性に優れた、プレキャスト鉄筋コンクリート梁部材同士の接合方法及び接合構造を提供することにある。 The object of the present invention can be suitably implemented in any structural form in which a plurality of column main bars c protrude below or above the PCa column member e, and the PCa beam is used to join the PCa beam members a and a together. Providing a method and structure for joining precast reinforced concrete beam members that can dramatically simplify large-scale post-construction work without moving the members horizontally, realizes a shortened construction period, and is economical. There is.

本発明の次の目的は、ベランダ等の逆梁部材の接合にも好適に実施でき、梁部材の正面側から接合作業を行なって施工階での作業を合理化するプレキャスト鉄筋コンクリート梁部材同士の接合方法及び接合構造を提供することにある。 The next object of the present invention is a method for joining precast reinforced concrete beam members, which can be suitably implemented for joining reverse beam members such as verandas, and rationalizes work on the construction floor by performing joining work from the front side of the beam members. And providing a joint structure.

上記した背景技術の課題を解決するための手段として、請求項１に記載した発明に係るプレキャスト鉄筋コンクリート梁部材同士の接合方法において、
プレキャスト鉄筋コンクリート梁部材同士の接合方法において、
梁部材には、その接合すべき端部の正面中央部に、凹部を形成し、同凹部を上下方向に通る線上の下位側にナットを埋め込み、上位側に鉄筋又はボルトを通す孔及びナット受け部を形成しており、
前記プレキャスト鉄筋コンクリート梁部材の端部同士を相対峙させ、両梁部材の前記凹部に跨る鋼材を嵌め入れ、ネジを切った鉄筋又はボルトを前記ナット受け部から差し入れて、下位のナットに向かってねじ込み、同鉄筋又はボルトの上端もナットを締結して固定し、
しかる後に、前記梁部材の目地部、凹部、孔及びナット受け部へ硬化材を注入充填して固着しプレキャスト鉄筋コンクリート梁部材同士を接合することを特徴とする。 As a means for solving the problems of the background art described above, in the method for joining precast reinforced concrete beam members according to the invention described in claim 1,
In the method of joining precast reinforced concrete beam members,
In the beam member, a recess is formed in the front center part of the end part to be joined, a nut is embedded on the lower side of the line passing through the recess in the vertical direction, and a hole and nut receiver through which the reinforcing bar or bolt is passed on the upper side Forming part,
The ends of the precast reinforced concrete beam members are made to face each other, a steel material straddling the recesses of both beam members is inserted, and a threaded rebar or bolt is inserted from the nut receiving portion and screwed toward the lower nut. , Also fasten the nuts at the top of the rebar or bolt
Thereafter, the precast reinforced concrete beam members are bonded to each other by injecting and filling a hardener into the joints, recesses, holes and nut receiving portions of the beam members.

請求項２記載の発明は、請求項1に記載したプレキャスト鉄筋コンクリート梁部材同士の接合方法において、
プレキャスト鉄筋コンクリート梁部材同士の接合方法において、
梁部材には、その接合すべき端部の正面中央部に、凹部を形成し、同凹部の側周面にナットを埋め込み、
前記プレキャスト鉄筋コンクリート梁部材の端部同士を相対峙させ、両梁部材の前記凹部に跨る鋼材を嵌め入れ、ボルトを鋼材に設けたボルト孔から前記ナットに向かって差し入れてねじ込み、
しかる後に、少なくとも梁部材の目地部へ硬化材を注入充填して固着しプレキャスト鉄筋コンクリート梁部材同士を接合することを特徴とする。 The invention according to claim 2 is a method of joining precast reinforced concrete beam members according to claim 1,
In the method of joining precast reinforced concrete beam members,
In the beam member, a recess is formed in the front center portion of the end portion to be joined, and a nut is embedded in the side peripheral surface of the recess,
Reciprocally end the precast reinforced concrete beam members, fit the steel material straddling the recesses of both beam members, insert the bolt from the bolt hole provided in the steel material toward the nut, and screw,
Thereafter, the hardened material is injected and filled into at least the joints of the beam members and fixed, and the precast reinforced concrete beam members are joined together.

請求項３に記載した発明に係るプレキャスト鉄筋コンクリート梁同士の接合構造は、
プレキャスト鉄筋コンクリート梁部材同士の接合構造において、
梁部材には、その接合すべき端部の正面中央部に凹部が形成され、同凹部を上下方向に通る線上の下位側にナットが埋め込まれ、且つ上位側に鉄筋又はボルトを通す孔及びナット受け部が形成された構成の二つのプレキャスト鉄筋コンクリート梁部材の端部同士が相対峙させて位置決めされていること、
両梁部材の前記凹部に跨る鋼材が嵌め入れられ、ネジを切った鉄筋又はボルトが前記ナット受け部から差し入れられて、下位のナットに向かってねじ込まれ、同鉄筋又はボルトの上端もナットを締結して固定されていること、
前記梁部材の目地部、凹部、孔及びナット受け部へ硬化材が注入充填され固着されてプレキャスト鉄筋コンクリート梁部材同士が接合されていることを特徴とする。 The joint structure between precast reinforced concrete beams according to the invention described in claim 3 is:
In the joint structure between precast reinforced concrete beam members,
In the beam member, a recess is formed in the front center portion of the end portion to be joined, a nut is embedded on the lower side on a line passing through the recess in the vertical direction, and a hole and nut through which a reinforcing bar or bolt is passed on the upper side The end portions of the two precast reinforced concrete beam members having a structure in which the receiving portion is formed are positioned relative to each other;
A steel material straddling the recesses of both beam members is fitted, and a threaded reinforcing bar or bolt is inserted from the nut receiving part and screwed into the lower nut, and the upper end of the reinforcing bar or bolt is also fastened with the nut Being fixed,
A precast reinforced concrete beam member is bonded to the joint, recess, hole, and nut receiving portion of the beam member by being injected, filled, and fixed to each other.

請求項４に記載した発明に係るプレキャスト鉄筋コンクリート梁同士の接合構造は、
プレキャスト鉄筋コンクリート梁部材同士の接合構造において、
梁部材には、その接合すべき端部の正面中央部に凹部が形成され、且つ同凹部の側周面にナットが埋め込まれた構成の二つの前記プレキャスト鉄筋コンクリート梁部材の端部同士が相対峙させて位置決めされていること、
両梁部材の前記凹部に跨る鋼材が嵌め入れられ、ボルトが鋼材に設けたボルト孔から前記ナットに向かって差し入れてねじ込まれていること、
少なくとも梁部材の目地部へ硬化材が注入充填され固着されてプレキャスト鉄筋コンクリート梁部材同士が接合されていることを特徴とする。 The joint structure between precast reinforced concrete beams according to the invention described in claim 4 is:
In the joint structure between precast reinforced concrete beam members,
In the beam member, a recess is formed in the front center portion of the end portion to be joined, and the end portions of the two precast reinforced concrete beam members having a structure in which a nut is embedded in a side peripheral surface of the recess portion are relative to each other. To be positioned,
Steel material straddling the recesses of both beam members is fitted, and bolts are inserted and screwed into the nuts from bolt holes provided in the steel materials,
It is characterized in that the precast reinforced concrete beam members are joined together by injecting, filling and fixing at least the joints of the beam members.

請求項５記載の発明は、請求項３又は４に記載したプレキャスト鉄筋コンクリート梁部材同士の接合構造において、
凹部及び鋼材は横断面形状がコ字形とされ、鋼材は上下の水平フランジ部の間に補強プレートを形成して成り、上下の水平フランジ部に形成したボルト孔を通じて鉄筋又はボルトが通されていることを特徴とする。 Invention of Claim 5 is in the junction structure of the precast reinforced concrete beam members described in Claim 3 or 4,
The concave portion and the steel material have a U-shaped cross section, and the steel material is formed by forming a reinforcing plate between the upper and lower horizontal flange portions, and the reinforcing bars or bolts are passed through the bolt holes formed in the upper and lower horizontal flange portions. It is characterized by that.

請求項６記載の発明は、請求項３〜５のいずれか一に記載したプレキャスト鉄筋コンクリート梁部材同士の接合構造において、
凹部の内側面であって、下位側に埋め込まれたナットの入り口及び鉄筋又はボルトを通す孔の下部に及び／又は左右面にコッター用の凹部が設けられていることを特徴とする。 Invention of Claim 6 is in the junction structure of the precast reinforced concrete beam members as described in any one of Claims 3-5,
A cotter recess is provided on the inner surface of the recess, at the bottom of the hole through which the reinforcing bar or bolt is inserted and / or on the left and right surfaces of the nut embedded on the lower side.

請求項７記載の発明は、請求項３〜６のいずれか一に記載されたプレキャスト鉄筋コンクリート梁部材同士の接合構造において、
鉄筋又はボルトを通す孔は、シース管で形成されていることを特徴とする。 The invention according to claim 7 is the joining structure of the precast reinforced concrete beam members according to any one of claims 3 to 6,
The hole for passing the reinforcing bar or the bolt is formed by a sheath tube.

請求項８記載の発明は、請求項１〜７のいずれか一に記載したプレキャスト鉄筋コンクリート梁部材同士の接合方法及び接合構造において、
硬化材は、コンクリート又はグラウト、エポキシ樹脂等であることを特徴とする。 Invention of Claim 8 is the joining method and joining structure of the precast reinforced concrete beam members as described in any one of Claims 1-7,
The hardener is concrete, grout, epoxy resin or the like.

請求項１、３、５〜８に記載した発明に係るプレキャスト鉄筋コンクリート梁部材同士の接合方法及び接合構造によれば、
プレキャスト鉄筋コンクリート梁部材は、接合端部に凹部が形成され、同凹部を上下方向に通す線上のコンクリート梁部材の下位側にナットが埋め込まれ、上位側に鉄筋を通す孔及びナット受け部が形成され、両梁部材の前記凹部へ鋼材が嵌め入れられ、鉄筋が前記ナット受け部から差し入れられて、下位のナットへねじ込まれ、同鉄筋の上端をナットで締結して固定され、前記凹部、孔及びナット受け部へグラウトが注入充填されて接合される構造としたので、ＰＣａ梁部材を水平移動させることなくＰＣａ梁部材同士を接合でき、ＰＣａ柱部材の下方又は上方に複数の柱主筋を突き出す何れの構造形式においても好適に実施することができる。また、従前の接合部近傍にコンクリート打設用の型枠を設置しコンクリートを打設するなどの大掛かりな後工事を飛躍的に簡略化して、工期の短縮を実現し、経済性に優れたＰＣａ梁部材同士の接合方法を実現できる。 According to the joining method and the joining structure of the precast reinforced concrete beam members according to the invention described in claims 1, 3, 5-8,
A precast reinforced concrete beam member has a recess formed at the joint end, a nut is embedded on the lower side of the concrete beam member on the line passing through the recess in the vertical direction, and a hole and nut receiving portion through which the reinforcing bar passes are formed on the upper side. The steel material is fitted into the recesses of both beam members, the rebar is inserted from the nut receiving portion, screwed into the lower nut, and the upper end of the rebar is fastened with a nut and fixed, and the recess, hole, and Since the grout is injected and filled into the nut receiving portion and joined, the PCa beam members can be joined without horizontally moving the PCa beam members, and a plurality of column main bars protrude below or above the PCa column member. It can implement suitably also in the structure type of. Also, PCa has excellent economic efficiency by dramatically shortening the work period by drastically simplifying large-scale post-work such as placing concrete in the vicinity of previous joints and placing concrete. A method of joining beam members can be realized.

また、ＰＣａ梁部材の正面側（ベランダ側）から接合作業を行う方法であるため、ベランダ等の逆梁部材においてベランダ側からのみで接合作業できるので、足場の設置作業をすることなく効率的に実施でき、ＰＣａ梁部材の他側壁面（外壁面）の化粧仕上げ等をＰＣａ梁部材の製造時に済ますことができるので、施工階での作業を著しく合理化することができる。 In addition, since the joining work is performed from the front side (the veranda side) of the PCa beam member, the joining work can be performed only from the veranda side in the reverse beam member such as a veranda. Since it can be carried out and the finishing of the other side wall surface (outer wall surface) of the PCa beam member can be completed at the time of manufacturing the PCa beam member, the work on the construction floor can be remarkably streamlined.

請求項２、４に記載した発明によれば、プレキャスト鉄筋コンクリート梁部材には、その接合すべき端部の正面中央部に凹部が形成され、且つ同凹部の側周面に予めナットが埋め込まれ、両梁部材の前記凹部に跨る鋼材が嵌め入れられ、ボルトが鋼材に設けたボルト孔から前記ナットに向かって差し入れてねじ込まれ、梁部材の目地部へ硬化材が注入充填され接合されている接合構造としたので、上記請求項１、３、５〜８に記載した効果に加えて、長い鉄筋を上位のナット受け部から差し入れ下位のナットへ位置合わせしてねじ込むという少々手間の掛かる作業を省き、簡易なボルト止めにより鋼材を固定するので作業効率を更に向上できる。のみならず鋼材を確実にプレキャスト鉄筋コンクリート梁部材内へ固定することができる。 According to the invention described in claims 2 and 4, in the precast reinforced concrete beam member, a concave portion is formed in the front center portion of the end portion to be joined, and a nut is embedded in advance in the side peripheral surface of the concave portion, A steel material straddling the recesses of both beam members is fitted, a bolt is inserted and screwed into a nut from a bolt hole provided in the steel material, and a hardening material is injected and filled into the joint portion of the beam member and joined. Since it has a structure, in addition to the effects described in claims 1, 3, 5 to 8, a long and troublesome operation of inserting a long reinforcing bar from the upper nut receiving portion and aligning and screwing it to the lower nut is omitted. Since the steel material is fixed by simple bolting, the work efficiency can be further improved. Not only can the steel be securely fixed in the precast reinforced concrete beam member.

本発明は、プレキャスト鉄筋コンクリート梁部材（以下、単にＰＣａ梁部材と云う。）１、２には、その接合すべき端部の正面Ｆの中央部に凹部３が形成され、且つ同凹部３を上下方向に通す線上の下位側にナット４が埋め込まれ、上位側に鉄筋を通す孔５及びナット受け部６が形成された構成の二つのＰＣａ梁部材１、２の端部同士が相対峙するように位置決めされている。
両梁部材１、２の前記凹部３に跨る鋼材７が嵌め入れられ、ネジを切った鉄筋８が前記ナット受け部６から差し入れられて、下位側のナット４に向かってねじ込まれ、同鉄筋８の上端がナット９で締結して固定されていること。
前記凹部３、孔５及びナット受け部６へ硬化材が注入充填されてプレキャスト鉄筋コンクリート梁部材同士が接合されている。 In the present invention, a precast reinforced concrete beam member (hereinafter simply referred to as a PCa beam member) 1 and 2 is formed with a recess 3 at the center of the front F of the end portion to be joined. The ends of the two PCa beam members 1 and 2 having a structure in which the nut 4 is embedded on the lower side of the line passing in the direction and the hole 5 and the nut receiving portion 6 for passing the reinforcing bar are formed on the upper side are opposed to each other. Is positioned.
A steel material 7 straddling the concave portion 3 of both the beam members 1 and 2 is inserted, and a threaded reinforcing bar 8 is inserted from the nut receiving part 6 and screwed toward the lower nut 4, and the reinforcing bar 8 The upper end of the screw is fastened and fixed with a nut 9.
A hardening material is injected and filled into the concave portion 3, the hole 5 and the nut receiving portion 6, and the precast reinforced concrete beam members are joined to each other.

本発明に係るプレキャスト鉄筋コンクリート梁部材同士の接合構造の実施例を図１及び図２に基づいて説明する。
この接合構造は、ベランダ等の逆梁部材において好適に実施されるものであり、特に隣り合うＰＣａ梁部材を接合する際に、同ＰＣａ梁部材を水平方向に移動すること無く且つ一側壁面Ｆから接合作業をならしめることを特徴とする。 An embodiment of a joint structure between precast reinforced concrete beam members according to the present invention will be described with reference to FIGS.
This joining structure is suitably implemented in a reverse beam member such as a veranda, and particularly when joining adjacent PCa beam members, the PCa beam members do not move in the horizontal direction and the one side wall surface F is used. It is characterized by smoothing the joining work.

本発明の水平方向に連続して接合されるＰＣａ梁部材同士１と２は、図１Ａ、Ｂ、Ｃに示すように、その接合すべき端部の正面Ｆの中央部（ベランダ側Ｆとも云う。）に他側面Ｂを残した凹部３が形成されている。この凹部３は、後述する鋼材７が両ＰＣａ梁部材１、２を跨って配置可能に高さレベルが同じに形成されている（図１Ｂ）。
また、コンクリート梁部材１、２は、同凹部３を上下方向に通す線上の下位側にナット４が埋め込まれ、上位側に鉄筋８を通す孔５及びナット受け部６が形成されている。
前記ナット４は所謂袋ナット（又はロングナット）であり、前記鉄筋８を通す孔５は例えばシース管で構成されている（請求項７記載の発明）。
前記ナット受け部６は図示例ではＰＣａ梁部材１、２の上面端部にのみ設けているが、この限りではなく下端（又は下方）にも同様に形成することも好適に実施される。
更に、凹部３の内周面には、下位側に埋め込まれる前記ナット４の入り口及び鉄筋を通す孔５の下部及び／又は左右側面にコッター用の凹部１０が設けられている（請求項６記載の発明）。 As shown in FIGS. 1A, 1B, and 1C, the PCa beam members 1 and 2 that are continuously joined in the horizontal direction of the present invention have a central portion (also referred to as a veranda side F) of the front face F of the end portion to be joined. .) Is formed with a recess 3 leaving the other side surface B. The recess 3 is formed with the same height level so that a steel material 7 to be described later can be disposed across both PCa beam members 1 and 2 (FIG. 1B).
Moreover, the concrete beam members 1 and 2 have a nut 4 embedded in a lower side on a line passing through the concave portion 3 in the vertical direction, and a hole 5 and a nut receiving portion 6 through which a reinforcing bar 8 passes.
The nut 4 is a so-called cap nut (or long nut), and the hole 5 through which the reinforcing bar 8 passes is formed of, for example, a sheath tube (invention according to claim 7).
In the illustrated example, the nut receiving portion 6 is provided only at the upper end portions of the PCa beam members 1 and 2, but the nut receiving portion 6 is not limited to this, and it may be suitably formed at the lower end (or below) in the same manner.
Furthermore, the recessed part 10 is provided in the inner peripheral surface of the recessed part 3 in the lower part and / or right and left side surfaces of the hole 5 which penetrates the entrance of the nut 4 and the reinforcing bar embedded in the lower side (Claim 6). Invention).

上記のような構成とされたＰＣａ梁部材１、２は、クレーン等により相対峙するように突き合わせて位置決めされ、前記凹部３へ鋼材７が正面Ｆ（ベランダ側）から嵌め入れられる。前記鋼材７は断面形状がコ字形とされる所謂Ｃ型鋼であり、前記鋼材７は少なくとも上下の辺にボルト孔７０ａを備えた水平フランジ部７０を有しており、図示例では同水平フランジ部７０の上下間に補強プレート７１を設けて、上部が開口する箱形に形成されている。ウエブ部７２の全面には図示することは省略したが、軽量化や硬化材の充填性向上のために円形、角形等の穴をあけておくことが好ましい。
鋼材７は勿論この限りではなく、上部が開口しない蓋を有する形状とすることも考えられる。前記補強プレート７１は所謂スチフナーであり、図示することは省略したが水平方向に複数形成することが好ましい（請求項５記載の発明）。その形状としてはコ字形状の鋼材７の内側に嵌め入れ可能な長方形（図２Ａ）としてもよいし、鋼材７の内側の上下端部に配置可能な略三角形状（図２Ｂ）に形成して実施しても良い。 The PCa beam members 1 and 2 configured as described above are positioned so as to face each other with a crane or the like, and the steel material 7 is fitted into the concave portion 3 from the front surface F (the veranda side). The steel material 7 is a so-called C-shaped steel having a U-shaped cross section, and the steel material 7 has a horizontal flange portion 70 having bolt holes 70a at least on the upper and lower sides. A reinforcing plate 71 is provided between the upper and lower portions of the plate 70 and is formed in a box shape having an upper portion opened. Although illustration is omitted on the entire surface of the web portion 72, it is preferable to make a hole such as a circle or a square in order to reduce the weight or improve the filling property of the hardened material.
Of course, the steel material 7 is not limited to this, and a shape having a lid whose upper part does not open is also conceivable. The reinforcing plate 71 is a so-called stiffener, and although it is not shown in the figure, a plurality of reinforcing plates 71 are preferably formed in the horizontal direction (the invention according to claim 5). The shape may be a rectangular shape (FIG. 2A) that can be fitted inside the U-shaped steel material 7 or a substantially triangular shape (FIG. 2B) that can be placed on the upper and lower ends of the inside of the steel material 7. You may carry out.

上記のように鋼材７が凹部３へ嵌め入れられた後、ネジを切った鉄筋８がＰＣａ梁部材
１、２の前記ナット受け部６から差し入れられ、鋼材７の上下の水平フランジ部７０に設けたボルト孔７０ａを貫通され、下位のナット４へねじ込まれたあと、前記鉄筋８の上端部がナット９で締結されて固定される。 After the steel material 7 is inserted into the recess 3 as described above, the threaded reinforcing bar 8 is inserted from the nut receiving portion 6 of the PCa beam members 1 and 2 and provided on the upper and lower horizontal flange portions 70 of the steel material 7. After being passed through the bolt hole 70 a and screwed into the lower nut 4, the upper end portion of the reinforcing bar 8 is fastened and fixed by the nut 9.

上記のように固定された後、図３に示すように、前記ＰＣａ梁部材１、２の目地部、鉄筋挿入部４、凹部３及び鋼材７の内部へグラウト等の硬化材が注入充填され固着されて、対向するＰＣａ梁部材１、２が水平移動されることなく且つ、正面（ベランダ側）Ｆから接合される。グラウトは、例えばエポキシ樹脂又は樹脂モルタルであることが好ましい。
この限りではなく、単にナット等で緊結するのみでグラウトせずに接合する構造としても良い。 After fixing as described above, as shown in FIG. 3, a hardening material such as grout is injected into the joints of the PCa beam members 1, 2, the reinforcing bar insertion portion 4, the recess 3, and the steel material 7 and fixed. Thus, the facing PCa beam members 1 and 2 are joined from the front (veranda side) F without being moved horizontally. The grout is preferably, for example, an epoxy resin or a resin mortar.
However, the present invention is not limited to this, and it is also possible to have a structure in which the screws are simply joined with nuts or the like and are joined without being grouting.

次に、請求項１に記載した実施例１の発明に係るプレキャスト鉄筋コンクリート梁同士の接合方法を簡潔に説明する。
即ち、ＰＣａ梁部材１、２に、予め工場等でその接合すべき端部の正面Ｆ中央部に、凹部３を形成し、同凹部３を上下方向に通る線上の下位側にナット４を埋め込み、上位側に鉄筋８又はボルトを通す孔５及びナット受け部６を形成しておく。
上記の方法で作製された前記ＰＣａ梁部材１、２の端部同士をクレーン等により相対峙させて位置決めした後、両梁部材１、２の前記凹部３に跨る鋼材７を嵌め入れ、ネジを切った鉄筋８又はボルトを前記ナット受け部６から差し入れて、下位のナット４に向かってねじ込み、同鉄筋８又はボルトの上端もナット９を締結して固定する。
しかる後に、前記梁部材１、２の目地部、凹部３、孔５及びナット受け部６へ硬化材を注入充填して固着しプレキャスト鉄筋コンクリート梁部材同士を接合する。
好ましくは、グラウト充填した後に、再度ナット９を締め込んでＰＣａ梁部材へプレストレスを導入することが好適に実施される。
この限りではなく、単にナット等で緊結するのみでグラウトせずに接合する方法としても良い。 Next, a method for joining precast reinforced concrete beams according to the first embodiment of the present invention will be briefly described.
That is, in the PCa beam members 1 and 2, a recess 3 is formed in the center of the front F of the end portion to be joined beforehand at a factory or the like, and a nut 4 is embedded on the lower side of the line passing through the recess 3 in the vertical direction. The hole 5 and the nut receiving portion 6 through which the reinforcing bar 8 or the bolt is passed are formed on the upper side.
After positioning the end portions of the PCa beam members 1 and 2 produced by the above method with a crane or the like, the steel material 7 straddling the concave portion 3 of both beam members 1 and 2 is fitted, and screws are inserted. The cut reinforcing bar 8 or bolt is inserted from the nut receiving portion 6 and screwed toward the lower nut 4, and the upper end of the reinforcing bar 8 or bolt is also fastened and fixed with the nut 9.
Thereafter, the hardened material is injected and filled into the joints, the recesses 3, the holes 5 and the nut receiving portions 6 of the beam members 1 and 2, and the precast reinforced concrete beam members are joined together.
Preferably, after the grout filling, the nut 9 is tightened again to introduce prestress into the PCa beam member.
However, the present invention is not limited to this, and it is also possible to use a method of joining without grouting simply by tightening with a nut or the like.

次に、請求項４に記載したプレキャスト鉄筋コンクリート梁部材同士の接合構造を説明する。実施例２は実施例１と略同様の技術的思想であるため、その相違点を中心に説明する。
図４Ａ、Ｂに示すように、ＰＣａ梁部材同士１、２には、上述したと同様の上記凹部３が形成されている。更に本実施例では同凹部３の側周面、つまり上下方向に通る線上の下位側と上位側及び左右方向に通る線上の左側と右側にはそれぞれナット４…が複数埋め込まれる構成とされている。前記ナット４とは実施例１と同様に例えば袋ナットである。 Next, the joining structure of the precast reinforced concrete beam members described in claim 4 will be described. Since the second embodiment has substantially the same technical idea as the first embodiment, the difference will be mainly described.
As shown in FIGS. 4A and 4B, the concave portions 3 similar to those described above are formed in the PCa beam members 1 and 2. Further, in this embodiment, a plurality of nuts 4 are embedded on the side peripheral surface of the recess 3, that is, the lower side and the upper side on the line passing in the vertical direction and the left side and the right side on the line passing in the horizontal direction. . The nut 4 is, for example, a cap nut as in the first embodiment.

上記のように構成されたＰＣａ梁部材１、２の端部同士は相対峙させて位置決めされる。
両梁部材１、２の前記凹部３に跨る鋼材７が嵌め入れられ、ボルト１１が鋼材７のボルト孔７ａから前記ナット４へ向かって差し入れねじ込まれる。
そして、少なくとも梁部材１、２の目地部へ硬化材が注入充填され固着させてプレキャスト鉄筋コンクリート梁部材同士が接合されることも好適に実施できる。
図示例の場合凹部３へグラウト注入充填をしていないが、勿論グラウトを行っても良い。但し、鋼材７の厚みが十分にあり強度が相当に見込める場合には積極的に行う必要はない。 The ends of the PCa beam members 1 and 2 configured as described above are positioned relative to each other.
The steel material 7 straddling the concave portion 3 of the both beam members 1 and 2 is fitted, and the bolt 11 is inserted into the nut 4 from the bolt hole 7a of the steel material 7 and screwed.
And it can also be suitably implemented that the precast reinforced concrete beam members are joined to each other by injecting, filling and fixing at least the joints of the beam members 1 and 2.
In the illustrated example, the recess 3 is not filled with grouting, but of course, grouting may be performed. However, when the thickness of the steel material 7 is sufficient and the strength can be expected to be considerable, it is not necessary to perform it actively.

上記実施例２の接合方法は、実施例１の接合方法と略同様である。即ち、ＰＣａ梁部材１、２には、予め工場等でその接合すべき端部の正面Ｆの中央部に凹部３を形成し、同凹部３の側周面にナット４を複数埋め込んでおく。 The joining method of Example 2 is substantially the same as the joining method of Example 1. That is, in the PCa beam members 1 and 2, a recess 3 is formed in advance in the center of the front F of the end to be joined at a factory or the like, and a plurality of nuts 4 are embedded in the side peripheral surface of the recess 3.

上記の方法で作製した前記ＰＣａ梁部材１、２の端部同士をクレーン等で相対峙させて位置決めした後、両梁部材１、２の前記凹部３に跨る鋼材７を嵌め入れ、ボルト１１を鋼材７に設けたボルト孔７ａから前記側周面のナット４へ向かって差し入れねじ込んで固定する。
しかる後に、少なくとも梁部材の目地部へ硬化材を注入充填して固着しプレキャスト鉄筋コンクリート梁部材同士を接合する方法とされる（請求項２記載の発明）。 After positioning the end portions of the PCa beam members 1 and 2 produced by the above method with a crane or the like, the steel material 7 straddling the concave portion 3 of the both beam members 1 and 2 is fitted, and the bolt 11 is fitted. A bolt hole 7a provided in the steel material 7 is inserted and screwed into the nut 4 on the side peripheral surface and fixed.
Thereafter, at least the joint material of the precast reinforced concrete beam members is joined by injecting, filling and fixing at least the joints of the beam members to the joints (the invention according to claim 2).

以上に本発明の実施例を説明したが、本発明はこうした実施例に何ら限定されるものではなく、本発明の要旨を逸脱しない範囲において、種々の形態で実施し得る。例えば、図１は正面図として表したが、平面図として実施することもできる。つまり、高さが低く厚みがある梁部材（建物内に配置される梁）の接合においても上面から同様に実施できる。また、ベランダ等の逆梁部材でなく、部材の厚みが相当にある場合、正面Ｆ側のみでなく裏側Ｂも本発明を実施することもできる。その場合、鋼材にＨ鋼を使用することが好ましい。 Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments and can be implemented in various forms without departing from the gist of the present invention. For example, although FIG. 1 is represented as a front view, it can also be implemented as a plan view. That is, it can be similarly performed from the upper surface also in joining of a beam member having a low height and a large thickness (a beam arranged in a building). In addition, when the thickness of the member is not a reverse beam member such as a veranda, the present invention can be implemented not only on the front F side but also on the back side B. In that case, it is preferable to use H steel as the steel material.

Ａは相対峙するプレキャスト鉄筋コンクリート梁部材同士を突き合わせた状態を示す平面図である。ＢはＡの正面図である。ＣはＩ−Ｉの矢視断面図である。A is a top view which shows the state which face-matched the precast reinforced concrete beam members which face each other. B is a front view of A. FIG. C is a cross-sectional view taken along the line II. Ａ、Ｂは補強プレートの他の実施例を示した側面図である。A and B are side views showing another embodiment of the reinforcing plate. グラウトを注入充填した状態を示す側面図である。It is a side view which shows the state which injected and filled grout. Ａは実施例２のプレキャスト鉄筋コンクリート梁部材及び鋼材の概念を示す一例を示した図である。Ｂは実施例２のプレキャスト鉄筋コンクリート梁部材同士の接合構造の完成図の一例を示した。A is the figure which showed an example which shows the concept of the precast reinforced concrete beam member of Example 2, and a steel material. B shows an example of a completed drawing of the joint structure of the precast reinforced concrete beam members of Example 2. Ａ、Ｂは従来の接合方法の概略を示す参考図である。A and B are reference views showing an outline of a conventional joining method. 従来の接合方法の概略を示す参考図である。It is a reference drawing which shows the outline of the conventional joining method.

Explanation of symbols

１、２プレキャスト鉄筋コンクリート梁部材
３凹部
４ナット（袋ナット）
５孔（シース管）
６ナット受け部
７鋼材
７０水平フランジ部
７０ａボルト孔
７１補強プレート
８鉄筋
９ナット
１０コッター用の凹部 1, 2 Precast reinforced concrete beam members 3 Recesses 4 Nuts (cap nuts)
5 holes (sheath tube)
6 Nut receiving portion 7 Steel material 70 Horizontal flange portion 70a Bolt hole 71 Reinforcement plate 8 Reinforcing bar 9 Nut 10 Recess for cotter

Claims

In the method of joining precast reinforced concrete beam members,
In the beam member, a recess is formed in the front center part of the end part to be joined, a nut is embedded on the lower side of the line passing through the recess in the vertical direction, and a hole and nut receiver through which the reinforcing bar or bolt is passed on the upper side Forming part,
The ends of the precast reinforced concrete beam members are made to face each other, a steel material straddling the recesses of both beam members is inserted, and a threaded rebar or bolt is inserted from the nut receiving portion and screwed toward the lower nut. , Also fasten the nuts at the top of the rebar or bolt
Thereafter, the precast reinforced concrete beam members are joined to each other by injecting and fixing a hardener to the joints, recesses, holes and nut receiving portions of the beam members, and joining the precast reinforced concrete beam members.

In the method of joining precast reinforced concrete beam members,
In the beam member, a recess is formed in the front center portion of the end portion to be joined, and a nut is embedded in the side peripheral surface of the recess,
Reciprocally end the precast reinforced concrete beam members, fit the steel material straddling the recesses of both beam members, insert the bolt from the bolt hole provided in the steel material toward the nut, and screw,
Thereafter, a precast reinforced concrete beam member is joined to each other, wherein the hardened material is injected and filled into at least the joints of the beam member and fixed to join the precast reinforced concrete beam members.

In the joint structure between precast reinforced concrete beam members,
In the beam member, a recess is formed in the front center portion of the end portion to be joined, a nut is embedded on the lower side on a line passing through the recess in the vertical direction, and a hole and nut through which a reinforcing bar or bolt is passed on the upper side The end portions of the two precast reinforced concrete beam members having a structure in which the receiving portion is formed are positioned relative to each other;
A steel material straddling the recesses of both beam members is fitted, and a threaded reinforcing bar or bolt is inserted from the nut receiving part and screwed into the lower nut, and the upper end of the reinforcing bar or bolt is also fastened with the nut Being fixed,
A joint structure of precast reinforced concrete beam members, wherein the precast reinforced concrete beam members are joined to each other by injecting, filling and fixing a hardening material into joints, recesses, holes and nut receiving parts of the beam members.

In the joint structure between precast reinforced concrete beam members,
In the beam member, a recess is formed in the front center portion of the end portion to be joined, and the end portions of the two precast reinforced concrete beam members having a structure in which a nut is embedded in a side peripheral surface of the recess portion are relative to each other. To be positioned,
Steel material straddling the recesses of both beam members is fitted, and bolts are inserted and screwed into the nuts from bolt holes provided in the steel materials,
A joint structure of precast reinforced concrete beam members, wherein the precast reinforced concrete beam members are joined to each other by injecting, filling, and fixing at least a joint material of the beam members.

The concave portion and the steel material have a U-shaped cross section, and the steel material is formed by forming a reinforcing plate between the upper and lower horizontal flange portions, and the reinforcing bars or bolts are passed through the bolt holes formed in the upper and lower horizontal flange portions. The joint structure of precast reinforced concrete beam members according to claim 3 or 4, characterized in that.

A cotter recess is provided on the inner surface of the recess, at the bottom of the hole through which the reinforcing bar or bolt is inserted, and / or on the left and right sides of the nut embedded in the lower side. The joint structure of the precast reinforced concrete beam members described in any one of 3 to 5.

The joint structure for precast reinforced concrete beam members according to any one of claims 3 to 6, wherein the hole through which the reinforcing bar or the bolt passes is formed by a sheath tube.

The joining method and joining structure of precast reinforced concrete beam members according to any one of claims 1 to 7, wherein the hardener is concrete, grout, epoxy resin or the like.