JP2019190035A - Joining method of precast concrete member and joint part concrete, and tensile strength transmission member used in the method - Google Patents

Joining method of precast concrete member and joint part concrete, and tensile strength transmission member used in the method Download PDF

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JP2019190035A
JP2019190035A JP2018080524A JP2018080524A JP2019190035A JP 2019190035 A JP2019190035 A JP 2019190035A JP 2018080524 A JP2018080524 A JP 2018080524A JP 2018080524 A JP2018080524 A JP 2018080524A JP 2019190035 A JP2019190035 A JP 2019190035A
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tension
tensile force
fixing
concrete
joint
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JP6999484B2 (en
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悦広 尾崎
Nobuhiro Ozaki
悦広 尾崎
正夫 上野
Masao Ueno
正夫 上野
岡安 隆史
Takashi Okayasu
隆史 岡安
宜和 高稻
Norikazu Takaine
宜和 高稻
大樹 日向
Daiki Hyuga
大樹 日向
佳き 周
Zhaodi Zhou
佳き 周
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Kajima Corp
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Abstract

To provide a joining method of a precast concrete member and joint part concrete in which a tendon is arranged inside, a PC member with its end being protruded is put on a top end of a support member located at axial both ends of the PC member, and in performing jointing on joint part concrete installed on the support member, interference between the tendons of the PC member opposed within the joint part concrete is prevented.SOLUTION: In putting a PC member 1 in which ends of a tendon 3 are protruded from end surfaces on a support member 2 located axial both ends of the PC member 1, and burying an anchoring end 32 of the tendon 3 protruded from the end surface of the PC member 1 into joint part concrete 4 installed on the support member 2, adherence between a peripheral surface of a protrusion section 31 protruded from at least the end surface of the PC member 1 of the tendon 3 and the joint part concrete 4 is cut, the anchoring end 32 is caused to have a function of transmitting tensile strength of the tendon 3 to the joint part concrete 4, and a tensile strength transmission member mounted on a top end of the support member 2 and the anchoring end 32 are engaged.SELECTED DRAWING: Figure 1

Description

本発明は内部に配置された緊張材の端部が端面から突出した梁部材等のプレキャストコンクリート部材を、柱部材等の支持部材の天端上に設置し、支持部材上に現場で打設される接合部コンクリートに接合するプレキャストコンクリート部材と接合部コンクリートとの接合方法、及びその方法で使用される引張力伝達部材に関するものである。   In the present invention, a precast concrete member such as a beam member in which an end of a tension member disposed inside protrudes from an end surface is installed on the top end of a support member such as a column member, and is placed on the support member in the field. In particular, the present invention relates to a method for joining a precast concrete member to be joined to the joint concrete and the joint concrete, and a tensile force transmission member used in the method.

PC鋼材等の緊張材が内部に配置されたプレキャストコンクリート製の梁部材を隣接する柱部材間に架設し、例えば柱部材上で対向する梁部材間の接合部に現場打ちコンクリートを打設し、梁部材と接合部にプレストレスを付与するような場合、通常は接合部コンクリートの硬化後、接合部コンクリートと梁部材に緊張材を挿通させ、緊張材を緊張することが行われる(特許文献1、2参照)。   A precast concrete beam member in which a tension material such as PC steel is placed is installed between adjacent column members, for example, cast-in-place concrete is cast at the joint between the beam members facing each other on the column member, When prestress is applied to the beam member and the joint, usually, after the joint concrete is cured, a tension material is inserted into the joint concrete and the beam member to tension the tension material (Patent Document 1). 2).

これらの方法ではポストテンション方式で接合部コンクリートにプレストレスを導入する関係で、緊張材に張力を付与するためのジャッキを柱部材上に設置する必要があるため(特許文献の段落0011)、緊張材の緊張作業にはジャッキを支持するための架台の柱部材上への設置と回収の作業を伴い、緊張のための準備作業と後処理作業が大掛かりになる。   In these methods, since a pre-stress is introduced into the joint concrete by a post-tension method, it is necessary to install a jack for applying tension to the tension member on the column member (paragraph 0011 of Patent Document). The tensioning work of the material involves the installation and recovery work on the column member of the pedestal for supporting the jack, and the preparation work and the post-processing work for the tension become large.

一方、内部に緊張材が配置されたプレキャストコンクリート部材(以下、PC部材)を端面間に距離を置き、端面から緊張材を突出させて配置すると共に、両緊張材を連結する等により互いに連係させ、緊張材に緊張力を付与した状態で、PC部材の端面間にコンクリートを打設する方法がある(特許文献3参照)。この方法ではコンクリートの強度発現後に緊張材の緊張力を解放させることによりコンクリートにPC部材の軸方向にプレストレスが導入される(段落0033)。   On the other hand, a precast concrete member (hereinafter referred to as a PC member) in which a tension material is disposed is arranged with a distance between the end surfaces, the tension material protruding from the end surface, and the two tension materials being linked to each other. There is a method of placing concrete between end faces of PC members in a state where tension is applied to the tension material (see Patent Document 3). In this method, prestress is introduced into the concrete in the axial direction of the PC member by releasing the tension of the tendon after the concrete has developed its strength (paragraph 0033).

特許文献3の方法はプレテンション方式でのプレストレスの導入方法であるが、緊張材への緊張力付与の目的で対向するコンクリート部材間距離を拡大させる作業を必要としている。このことから、PC部材間にジャッキを設置することを必要とするため(段落0030〜0032)、特許文献1、2と同様の準備作業と後処理作業が伴う。   The method of Patent Document 3 is a method of introducing prestress by a pretension method, but requires an operation of increasing the distance between opposing concrete members for the purpose of imparting tension to the tension material. For this reason, since it is necessary to install a jack between the PC members (paragraphs 0030 to 0032), the same preparation work and post-processing work as in Patent Documents 1 and 2 are involved.

これに対し、PC部材中に埋設され、PC部材の端面から突出し、接合部コンクリート中に配置される緊張材に緊張力を与えておいた状態で接合部コンクリートを打設し、接合部コンクリートの強度発現後、緊張材の緊張力を解放することにより接合部コンクリートにプレストレスを導入する方法がある(特許文献4参照)。   On the other hand, the joint concrete is placed in a state in which it is buried in the PC member, protrudes from the end face of the PC member, and tension is applied to the tension member disposed in the joint concrete. There is a method of introducing prestress into the joint concrete by releasing the tension of the tendon after the strength has been developed (see Patent Document 4).

この方法ではPC部材の端面から突出した緊張材の定着端部を、緊張力の解放時にPC部材の端面(軸方向中間部)側へ移動可能に保持しておき、接合部コンクリートの強度発現後、緊張材の緊張力を解放し、定着端部をPC部材の端面側へ移動させることで、プレテンション式に接合部コンクリートにプレストレスが導入される(段落0027)。   In this method, the fixing end of the tension member protruding from the end surface of the PC member is held so as to be movable toward the end surface (axial direction intermediate portion) side of the PC member when releasing the tension force, and after the strength of the joint concrete is developed. By releasing the tension of the tension member and moving the fixing end toward the end face of the PC member, prestress is introduced into the joint concrete in a pretension manner (paragraph 0027).

特開平9−105173号公報(請求項1、段落0007〜0018、図1〜図5)JP-A-9-105173 (Claim 1, paragraphs 0007 to 0018, FIGS. 1 to 5) 特開平10−115000号公報(請求項2、段落0006〜0015、図1、図2)JP 10-115000 A (Claim 2, paragraphs 0006 to 0015, FIG. 1 and FIG. 2) 特開2007−239301号公報(請求項1、段落0027〜0033、図4〜図9)JP 2007-239301 A (Claim 1, paragraphs 0027 to 0033, FIGS. 4 to 9) 特開2016−194223号公報(請求項1、段落0010〜0033、図1〜図8)JP-A-2006-194223 (Claim 1, paragraphs 0010 to 0033, FIGS. 1 to 8)

但し、接合部コンクリートに導入されるプレストレスの方向は接合部コンクリート中に配置される緊張材の、PC部材の端面からの突出区間の長さ方向である。すなわち、プレストレスの導入区間は突出区間の先端の定着部からPC部材の端面までの距離に応じた区間であるため、突出区間はPC部材の軸方向には接合部コンクリートの中央部を横切り、接合部コンクリートの全長に亘るように配置されることが有効である(段落0021、0046)。   However, the direction of the prestress introduced into the joint concrete is the length direction of the projecting section of the tendon disposed in the joint concrete from the end face of the PC member. That is, since the prestress introduction section is a section according to the distance from the fixing portion at the tip of the projecting section to the end surface of the PC member, the projecting section traverses the central portion of the joint concrete in the axial direction of the PC member, It is effective to arrange the joint concrete over the entire length (paragraphs 0021 and 0046).

このために、接合部コンクリートの内部では支持部材上で対向する、または交差するPC部材の各緊張材の定着部が互いに干渉(衝突)しないよう、各PC部材内に配置される緊張材の水平方向の位置を予め調整しておく必要がある(段落0079、図13)。またPC部材の緊張材の定着部は対向する側のPC部材の端面寄りに配置されるため、いずれかの緊張材の定着部と、直交方向の緊張材を含め、他の緊張材の突出区間との鉛直方向の納まりも調整する必要がある。   For this reason, the tension members arranged in the PC members are arranged horizontally so that the fixing portions of the tension members of the PC members facing or crossing each other on the support member do not interfere (collision) with each other inside the joint concrete. It is necessary to adjust the direction position in advance (paragraph 0079, FIG. 13). In addition, since the tension member fixing portion of the PC member is disposed near the end face of the PC member on the opposite side, the protruding portion of the other tension materials including any tension member fixing portion and the tension material in the orthogonal direction. It is also necessary to adjust the vertical fit.

本発明は上記背景より、特許文献4での接合部コンクリート内で対向するPC部材の緊張材同士の干渉を回避可能なプレキャストコンクリート部材と接合部コンクリートとの接合方法と、その方法で使用される引張力伝達部材を提案するものである。   The present invention is based on the above background, and is used in the method for joining a precast concrete member and joint concrete capable of avoiding interference between tendons of PC members facing each other in joint concrete in Patent Document 4, and the method. A tensile force transmission member is proposed.

請求項1に記載のプレキャストコンクリート部材と接合部コンクリートとの接合方法は、内部に緊張材が配置され、この緊張材の軸方向の端部が端面から突出したプレキャストコンクリート部材を、このプレキャストコンクリート部材の軸方向両端部に位置する支持部材の天端上に設置し、前記プレキャストコンクリート部材の軸方向の端面から突出した前記緊張材の定着端部を前記支持部材上に現場で打設される接合部コンクリート中に埋設する方法であり、
前記緊張材の全長の内、少なくとも前記プレキャストコンクリート部材の端面から突出した突出区間の周面と前記接合部コンクリートとの付着が切れ、前記定着端部は前記緊張材の引張力を前記接合部コンクリートに伝達する機能を有しており、
前記支持部材の天端上に、前記緊張材に生じる引張力を前記接合部コンクリート内で負担する引張力伝達部材を載置する工程と、
前記プレキャストコンクリート部材の軸方向端部を前記支持部材の天端上に載置する工程とを含み、
前記定着端部と前記引張力伝達部材を前記緊張材の引張力の作用の向きに互いに係合させた状態で前記支持部材上に前記接合部コンクリートを打設し、前記定着端部を前記接合部コンクリート中に埋設し、前記プレキャストコンクリート部材を前記接合部コンクリートに接合することを構成要件とする。
The joining method of the precast concrete member of Claim 1 and joining concrete WHEREIN: The tension material is arrange | positioned inside and the end part of the axial direction of this tension material protrudes from the end surface, this precast concrete member The fixing member is installed on the top end of the support member located at both ends in the axial direction, and the fixing end of the tendon protruding from the axial end surface of the precast concrete member is placed on the support member in the field. Embedded in concrete,
Of the total length of the tendon material, at least the peripheral surface of the projecting section projecting from the end surface of the precast concrete member is disconnected from the joint concrete, and the fixing end portion exerts the tensile force of the tendon material on the joint concrete. Has a function to communicate to
On the top end of the support member, placing a tensile force transmission member that bears the tensile force generated in the tension material in the joint concrete; and
Placing the axial end of the precast concrete member on the top end of the support member,
The joint concrete is placed on the support member in a state in which the fixing end and the tensile force transmitting member are engaged with each other in the direction of the tensile force of the tension material, and the fixing end is joined to the joint. It is embed | buried in part concrete, and joining the said precast concrete member to the said joint part concrete is made into a component requirement.

プレキャストコンクリート部材(以下、本項目中、PC部材)は主に梁部材や桁部材であるが、必ずしも水平部材とは限らない。支持部材は主に柱部材であり、杭を含む。支持部材はプレキャストコンクリート部材であるか、現場打ちコンクリート造であるか、あるいは複合(合成)構造であるかを問わない。「PC部材の軸方向両端部に位置する支持部材」とは、PC部材の軸方向両端部の位置に設置(立設)された支持部材の意味である。「接合部コンクリート」は支持部材の天端上のPC部材と支持部材との接合部に打設(充填)されるコンクリートである。   Precast concrete members (hereinafter referred to as PC members in this item) are mainly beam members and girder members, but are not necessarily horizontal members. The support member is mainly a column member and includes a pile. It does not matter whether the support member is a precast concrete member, a cast-in-place concrete structure, or a composite (synthetic) structure. The “support members positioned at both ends in the axial direction of the PC member” means the support members installed (standing) at the positions at both ends in the axial direction of the PC member. “Joint concrete” is concrete that is placed (filled) in the joint between the PC member and the support member on the top end of the support member.

PC部材は支持部材の天端上にはPC部材の軸方向に対向して設置される場合(部位)と、対向せずに設置される場合(部位)がある。支持部材が柱部材の場合、隅柱であれば、支持部材上には二方向のPC部材が対向せずに設置され、側柱であれば、支持部材上には一方向のPC部材が対向して設置され、他の方向のPC部材は対向せずに設置される。支持部材が一方向の壁体を構成するような場合で、壁体の端部に配置される支持部材上には一方向のPC部材が対向せず、一方向片側にのみ設置されることになる。いずれの場合にもPC部材の緊張材からの引張力は支持部材上に載置され、接合部コンクリート中に埋設される引張力伝達部材に伝達されるため、PC部材は必ずしも支持部材上で対向して設置される必要はない。   There is a case where the PC member is installed on the top end of the support member so as to face the axial direction of the PC member (part), and a case where the PC member is installed without facing (part). When the support member is a pillar member, if it is a corner pillar, the PC member in two directions is installed on the support member without facing, and if it is a side pillar, the PC member in one direction faces on the support member. The PC members in the other directions are installed without facing each other. In the case where the support member constitutes a unidirectional wall body, the unidirectional PC member does not face the support member disposed at the end of the wall body, and is installed only on one unidirectional side. Become. In either case, the tensile force from the tension member of the PC member is placed on the support member and transmitted to the tensile force transmission member embedded in the joint concrete, so the PC member does not necessarily face the support member. Need not be installed.

請求項1における「内部に緊張材が配置され」とは、図8に示すように緊張材3がPC部材1内でPC部材1の軸方向に沿い、懸垂曲線状に、または直線状等に配置されることである。「緊張材の全長の内、少なくともPC部材の端面から突出した突出区間の周面と接合部コンクリートとの付着が切れ」とは、緊張材3のPC部材1内に配置される区間では緊張材3の周面とPC部材1のコンクリートとの付着が切れる場合(請求項3)、付着が切れない場合があることを言う。   In FIG. 1, “the tension material is arranged inside” means that the tension material 3 is in the PC member 1 along the axial direction of the PC member 1 as shown in FIG. Is to be placed. “Of the total length of the tendon material, at least the peripheral surface of the projecting section projecting from the end face of the PC member is disconnected from the joint concrete” means that the tendon material in the section disposed in the PC member 1 of the tendon material 3 3 and the concrete of the PC member 1 are cut off (Claim 3), the sticking may not be cut off.

「突出区間31」は図1に示すようにPC部材1の端面から突出し、接合部コンクリート4中に埋設される区間を指し、「定着端部32」を含む。緊張材3には主にPC鋼材が使用されるが、繊維強化プラスチック等、張力の導入が可能な材料も使用される。PC鋼材の場合で、緊張材3の全長の付着が切れる場合、アンボンドPC鋼材、プレグラウトPC鋼材が使用される。   As shown in FIG. 1, the “projecting section 31” refers to a section that projects from the end face of the PC member 1 and is embedded in the joint concrete 4, and includes a “fixing end section 32”. PC steel is mainly used as the tension material 3, but materials capable of introducing tension, such as fiber reinforced plastic, are also used. In the case of the PC steel material, when the attachment of the full length of the tension material 3 is cut, an unbonded PC steel material and a pre-grout PC steel material are used.

「緊張材の軸方向の端部が端面から突出したPC部材」とは、緊張材3の端部が接合部コンクリート4中に埋設され、接合部コンクリート4の強度発現と共に定着されるよう、緊張材3の端部がPC部材1の軸方向の端面から突出した状態でPC部材1が製作されることを言う。緊張材3の端部は請求項1での定着端部32である。緊張材3の少なくともPC部材1の端面から突出した突出区間31の周面は「コンクリートに付着しない」が、「定着端部32」は接合部コンクリート4中に埋設されることによりそのまま定着されるため、実質的には突出区間31の内、定着端部32を除いた区間の周面が接合部コンクリート4には付着しない状態にある。突出区間31の周面がコンクリートに付着しない理由は、接合部コンクリート4の強度発現(硬化)後にも緊張材3の突出区間31を含む区間に緊張力を導入できる状態にするためである。突出区間31にのみ緊張力を導入することもある。   “A PC member in which the axial end of the tendon protrudes from the end face” means that the end of the tendon 3 is embedded in the joint concrete 4 and fixed with the strength of the joint concrete 4. It means that the PC member 1 is manufactured with the end portion of the material 3 protruding from the axial end surface of the PC member 1. The end of the tendon 3 is the fixing end 32 in the first aspect. At least the peripheral surface of the protruding section 31 protruding from the end surface of the PC member 1 of the tension member 3 does not adhere to the concrete, but the “fixing end portion 32” is fixed as it is by being embedded in the joint concrete 4. Therefore, substantially the peripheral surface of the section excluding the fixing end portion 32 in the protruding section 31 is not attached to the joint concrete 4. The reason why the peripheral surface of the projecting section 31 does not adhere to the concrete is that a tension force can be introduced into the section including the projecting section 31 of the tendon material 3 even after the strength (hardening) of the joint concrete 4. A tension may be introduced only into the protruding section 31.

「定着端部32」は接合部コンクリート4中に定着されるため、定着(アンカー)プレートや圧着グリップ等の定着体が接続された部分(区間)であり、定着体の形態は緊張材3の種類に応じて決められる。請求項1における「定着端部は引張力を接合部コンクリートに伝達する機能を有し」とは、定着体が接続された部分(区間)のいずれかの部分で引張力伝達部材5のいずれかの部分に緊張材3の引張力の作用の向きに係合したときに、緊張材3の引張力(緊張力を含む)を引張力伝達部材5に伝達する能力を持つことを言う。引張力伝達部材5には定着端部32が直接、係合する場合と、定着端部32に一体的に形成される、または図2に示すように固定状態で接続される伝達材33が係合する場合がある。引張力伝達部材5がPC部材1の軸方向を向く引張材52と引張材52の軸方向両側に定着材53を有する場合(請求項5)、定着端部32(伝達材33)は定着材53に係合する。   Since the “fixing end portion 32” is fixed in the joint concrete 4, it is a portion (section) to which a fixing body such as a fixing (anchor) plate or a crimping grip is connected. It is decided according to the type. “The fixing end portion has a function of transmitting a tensile force to the joint concrete” in claim 1 means that any portion of the tensile force transmitting member 5 in a portion (section) to which the fixing body is connected. It has the ability to transmit the tensile force (including the tensile force) of the tension material 3 to the tensile force transmission member 5 when the portion is engaged in the direction of the action of the tensile force of the tension material 3. When the fixing end 32 is directly engaged with the tensile force transmitting member 5, there is a transmission member 33 formed integrally with the fixing end 32 or connected in a fixed state as shown in FIG. May match. When the tensile force transmitting member 5 has a tensile member 52 facing the axial direction of the PC member 1 and fixing members 53 on both axial sides of the tensile member 52 (Claim 5), the fixing end 32 (transmitting member 33) is the fixing member. 53 is engaged.

「緊張材の引張力」はPC部材1に予め、または接合部コンクリート4のコンクリート打設前にプレストレスを導入する場合の緊張力の他、例えば平常時に緊張材3に緊張力が導入されていない場合で、地震の作用時にPC部材1と接合部コンクリート4を分離(肌別れ)させようとする水平力が作用したときに緊張材3に生じる引張力も含む。   The “tensile force of the tension material” refers to the tension force when the prestress is introduced to the PC member 1 in advance or before the concrete is placed on the joint concrete 4, for example, the tension force is introduced to the tension material 3 in normal times. It also includes the tensile force generated in the tension material 3 when a horizontal force is applied to separate (separate the skin) the PC member 1 and the joint concrete 4 when an earthquake occurs.

定着端部32(伝達材33)は支持部材2の天端上に載置された引張力伝達部材5に、接合部コンクリート4の打設前に緊張材3の引張力の作用の向きに係合し、緊張材3に導入されている場合の緊張力、または上記したPC部材1と接合部コンクリート4の接合後の地震時等に緊張材3に生じる引張力を引張力伝達部材5に伝達する。   The fixing end portion 32 (transmitting member 33) is connected to the tensile force transmitting member 5 placed on the top end of the supporting member 2 in accordance with the direction of the tensile force of the tension member 3 before the joint concrete 4 is placed. The tensile force generated when the tension member 3 is introduced or the tensile force generated in the tension member 3 during the earthquake after joining the PC member 1 and the joint concrete 4 is transmitted to the tensile force transmission member 5. To do.

PC部材1と接合部コンクリート4とは、引張力伝達部材5を支持部材2上に載置する工程と、PC部材1の軸方向端部(突出区間)を支持部材2上に載置する工程と、PC部材1の緊張材3の定着端部32を引張力伝達部材5に係合させた状態で接合部コンクリート4を打設する工程を経て接合される(請求項1)。請求項1における上記複数の「工程とを含み」とは、これら複数の工程の順序を問わない趣旨である。接合部コンクリート4の打設後、強度発現により定着端部32が接合部コンクリート4中に埋設、定着される。   The PC member 1 and the joint concrete 4 are a step of placing the tensile force transmitting member 5 on the support member 2 and a step of placing the axial end (protruding section) of the PC member 1 on the support member 2. Then, the joint concrete 4 is joined through a step of placing the joint concrete 4 in a state where the fixing end 32 of the tension member 3 of the PC member 1 is engaged with the tensile force transmitting member 5 (Claim 1). The term “including the steps” in claim 1 means that the order of the plurality of steps does not matter. After placing the joint concrete 4, the fixing end 32 is embedded and fixed in the joint concrete 4 due to strength development.

接合部コンクリート4の強度発現時点では、緊張材3に緊張力が導入されている場合と導入されていない場合があり、緊張力が導入されている場合には、緊張材3の全長に導入される場合と、突出区間31にのみ導入される場合の他、PC部材1内の区間にのみ導入される場合がある。緊張材3に緊張力が導入されていない場合、緊張材3の突出区間31には上記のように地震時に引張力が生じ、この引張力が分離したPC部材1と接合コンクリート4を復元させ、密着させる働きをする。請求項1では緊張材3に緊張力を導入せずに、定着端部32(伝達材33)を引張力伝達部材5(定着材53)に係合させることもある。   At the time of strength development of the joint concrete 4, there are cases where tension is introduced into the tension member 3 and cases where tension is not introduced. When tension is introduced, it is introduced into the entire length of the tension member 3. In addition to the case where it is introduced only into the protruding section 31, there are cases where it is introduced only into the section within the PC member 1. When no tension is introduced into the tension member 3, a tensile force is generated in the protruding section 31 of the tension member 3 at the time of the earthquake as described above, and the PC member 1 and the joint concrete 4 separated from each other are restored. Work to adhere. In the first aspect, the fixing end portion 32 (transmitting material 33) may be engaged with the tensile force transmitting member 5 (fixing material 53) without introducing the tension force to the tensioning material 3.

PC部材1内の区間にのみ導入される緊張力はPC部材1にプレストレスを付与し、緊張材3の全長に導入される緊張力の内、PC部材1内の区間に導入される緊張力もPC部材1にプレストレスを付与する。突出区間31の緊張力はPC部材1内の区間の緊張力を引張力伝達部材5に伝達し、PC部材1を接合部コンクリート4に圧着接合する働きをする。   The tension force introduced only in the section in the PC member 1 gives prestress to the PC member 1, and the tension force introduced in the section in the PC member 1 is also included in the tension force introduced in the entire length of the tension member 3. Prestress is applied to the PC member 1. The tension force in the protruding section 31 transmits the tension force in the section in the PC member 1 to the tensile force transmission member 5 and serves to press-bond the PC member 1 to the joint concrete 4.

以上のようにPC部材1と接合部コンクリート4とは、PC部材1の端面から突出した緊張材3の定着端部32と、接合部コンクリート4中に埋設される引張力伝達部材5(定着材53)との係合により緊張材3の引張力を引張力伝達部材5に圧縮力として伝達可能な状態で接合される。このため、図2に示すように定着端部32が接合部コンクリート4内を横切るように定着端部32を配置する必要がなく、定着端部32をその緊張材3が突出したPC部材1の端面に近い位置に配置すればよくなる。この結果、接合部コンクリート4内で対向する方向の、または交差する方向の緊張材3の定着端部32、32同士を干渉させる必要がなくなり、各方向の緊張材3の定着端部32、32間の水平方向の位置を調整する必要がなくなる。またいずれかの方向の緊張材3の定着端部32と、直交方向の緊張材3を含め、他の緊張材3の定着端部32との鉛直方向の納まりを調整する必要もなくなる。   As described above, the PC member 1 and the joint concrete 4 include the fixing end portion 32 of the tension member 3 protruding from the end surface of the PC member 1 and the tensile force transmission member 5 (fixing material) embedded in the joint concrete 4. 53), the tensile force of the tendon 3 is joined to the tensile force transmitting member 5 in a state where it can be transmitted as a compressive force. For this reason, as shown in FIG. 2, it is not necessary to arrange the fixing end 32 so that the fixing end 32 crosses the inside of the joint concrete 4, and the fixing member 32 protrudes from the tension member 3 of the PC member 1. It only has to be arranged at a position close to the end face. As a result, there is no need to cause the fixing ends 32, 32 of the tension members 3 in the opposite direction or intersecting directions in the joint concrete 4 to interfere with each other, and the fixing ends 32, 32 of the tension members 3 in each direction are eliminated. There is no need to adjust the horizontal position between them. Moreover, it is not necessary to adjust the vertical accommodation between the fixing end 32 of the tension member 3 in any direction and the fixing end 32 of the other tension members 3 including the tension member 3 in the orthogonal direction.

加えてPC部材1の緊張材3と接合部コンクリート4との、引張力を伝達可能な状態での接合、あるいは定着端部32の接合部コンクリート4中での定着が緊張材3の定着端部32と引張力伝達部材5の係合のみで済むことで、例えば支持部材2上で対向するPC部材1、1の端部から突出する緊張材3、3の端部同士を専用の接続具で連結する場合より接合、あるいは連結のために要する費用が抑えられる。   In addition, the joining of the tension member 3 of the PC member 1 and the joint concrete 4 in a state in which a tensile force can be transmitted, or the fixing of the fixing end 32 in the joint concrete 4 is performed. Since only the engagement between the tension member 3 and the tensile force transmitting member 5 is sufficient, for example, the ends of the tension members 3 and 3 protruding from the ends of the PC members 1 and 1 facing each other on the support member 2 are connected with a dedicated connector. The cost required for joining or connecting is less than when connecting.

突出区間31にのみ導入される場合の緊張力は例えばPC部材1の区間内の緊張材3をPC部材1のコンクリートに付着させながら、突出区間31の、PC部材1の端面、もしくはその付近に位置する部分を端面に定着させ、定着部分から先の突出区間31を緊張することにより導入される(請求項2)。請求項2における「接合部コンクリートの打設前の時点で緊張材に緊張力を導入し」とは、緊張材3への緊張力の導入の時期がPC部材1の支持部材2上への載置前であるか、載置後であるかを問わないことの意味である。突出区間31をPC部材1の端面に定着させるだけの場合、突出区間31のPC部材1端面への定着部分から先端側の定着端部32までの突出区間31には緊張力は入らない。   When the tension force is introduced only into the protruding section 31, for example, the tension material 3 in the section of the PC member 1 is attached to the concrete of the PC member 1, and the tension force is applied to the end surface of the PC member 1 or in the vicinity thereof. The portion to be positioned is fixed to the end face, and the protruding section 31 ahead of the fixing portion is tensioned (claim 2). The term “introducing tension to the tension material before placing the joint concrete” in claim 2 means that the tension is introduced into the tension material 3 on the support member 2 of the PC member 1. It does not matter whether it is before placement or after placement. When only the protruding section 31 is fixed to the end face of the PC member 1, no tension is applied to the protruding section 31 from the fixing portion of the protruding section 31 to the end face of the PC member 1 to the fixing end 32 on the front end side.

突出区間31にのみ緊張力を導入することは、PC部材1の端面に突出区間31のPC部材1の端面部分を定着させた状態で突出区間31を緊張し、そのまま定着端部32(伝達材33)を引張力伝達部材5(定着材53)に係合させることにより可能になる。突出区間31を含めた緊張材3の全長に緊張力を導入する場合、緊張材3のPC部材1の内部に位置する区間の周面とPC部材1との付着を切っておき、突出区間31をPC部材1の端面に(仮)定着させた状態で定着端部32(伝達材33)と引張力伝達部材5(定着材53)を係合させた後、PC部材1の端面に定着されている突出区間31の定着を解除する方法もある(請求項3)。   Introducing tension force only to the protruding section 31 means that the protruding section 31 is tensioned in a state in which the end surface portion of the PC member 1 of the protruding section 31 is fixed to the end surface of the PC member 1, and the fixing end portion 32 (transmitting material) 33) can be engaged with the tensile force transmission member 5 (fixing material 53). When the tension force is introduced into the entire length of the tension member 3 including the protruding section 31, the peripheral surface of the section located inside the PC member 1 of the tension member 3 is not attached to the PC member 1, and the protruding section 31 is cut. Is fixed to the end surface of the PC member 1 after engaging the fixing end 32 (transmitting material 33) and the tensile force transmitting member 5 (fixing material 53) in a state of being temporarily (fixed) fixed to the end surface of the PC member 1. There is also a method of releasing the fixing of the protruding section 31 that is present (claim 3).

この場合、定着の解除の仕方としては緊張材3の全長、またはPC部材1内の区間に緊張力を導入した状態で、例えば図1−(b)、図7に示すようにPC部材1内に離脱可能に埋設される被定着材7に突出区間31のPC部材1の端面部分を仮定着させ、定着端部32(伝達材33)を引張力伝達部材5(定着材53)に係合させた後、被定着材7をPC部材1から離脱させる方法がある。この場合、被定着材7の離脱の時期が接合部コンクリートの打設前であるか、打設後であるかは問われない。突出区間31の付着は切れているから、被定着材7の離脱の時期は接合部コンクリート4の硬化(強度発現)後であることもある。   In this case, as a method of releasing the fixing, in the state where the tension force is introduced into the entire length of the tension member 3 or the section in the PC member 1, for example, in the PC member 1 as shown in FIG. An end surface portion of the PC member 1 in the projecting section 31 is assumed to be attached to the fixing material 7 detachably embedded in the fixing member 32 and the fixing end portion 32 (transmitting material 33) is engaged with the tensile force transmitting member 5 (fixing material 53). After this, there is a method in which the fixing material 7 is detached from the PC member 1. In this case, it does not matter whether the fixing material 7 is released before or after the joint concrete is placed. Since the sticking of the protruding section 31 is cut off, the fixing material 7 may be detached after the joint concrete 4 is hardened (strength development).

被定着材7を離脱させる方法は一切、問われない。「被定着材7の離脱」は「定着の解除」の一例であるから、「定着の解除」の方法も問われない。例えば突出区間31をPC部材1端面に定着させる定着具6と、定着具6のPC部材1側が係止し、定着具6のPC部材1側への移動を阻止する被係止材8との間に、緊張材3の緊張力を圧縮力として負担し、次第に収縮(クリープ)するような材料を被定着材7として介在させる方法もある。この方法も「定着の解除」の一例に当たる。   There is no limitation on the method for removing the fixing material 7. Since “detachment of the fixing material 7” is an example of “cancellation of fixing”, the method of “cancellation of fixing” is not limited. For example, a fixing tool 6 that fixes the protruding section 31 to the end surface of the PC member 1 and a locked material 8 that is locked to the PC member 1 side of the fixing tool 6 and prevents the fixing tool 6 from moving to the PC member 1 side. There is also a method in which a tensioning force of the tension material 3 is borne as a compression force and a material that gradually contracts (creep) is interposed as the material to be fixed 7. This method is also an example of “release of fixing”.

請求項3では定着の解除(被定着材7の離脱)の結果、突出区間31は接合部コンクリート4には付着しないことで、接合部コンクリート4の打設後にも緊張材3の緊張力に応じ、被定着材7があった分、PC部材1内に引き込まれようとする。定着端部32はPC部材1の端面側へ移動しようとする引張力を受けるため、突出区間31の緊張力が定着端部31を介して引張力伝達部材5に伝達される。定着端部32が突出区間31の移動に伴って受ける引張力分、定着端部32と引張力伝達部材5(定着材53)との間の接触圧力が増大する。   According to the third aspect of the present invention, the protruding section 31 does not adhere to the joint concrete 4 as a result of the release of fixing (detachment of the material 7 to be fixed). Then, the portion to be fixed 7 tends to be drawn into the PC member 1 as much as there is. Since the fixing end 32 receives a tensile force that tends to move toward the end face of the PC member 1, the tension in the protruding section 31 is transmitted to the tensile force transmitting member 5 via the fixing end 31. The contact pressure between the fixing end 32 and the tensile force transmitting member 5 (fixing material 53) increases by the amount of the tensile force that the fixing end 32 receives as the protruding section 31 moves.

PC部材1内に位置する区間を含め、緊張材3に緊張力を導入する場合、突出区間31をPC部材1端面に定着せずに、定着端部32(伝達材33)を引張力伝達部材5(定着材53)に係合させ、緊張材3の緊張力を直接、引張力伝達部材5に伝達することもある(請求項4)。この場合、緊張材3への緊張力導入の時期は接合部コンクリート4の打設前と打設後の強度発現後がある。緊張材3への緊張力は引張力伝達部材5に係合した定着端部32の反対側の端部から導入される。定着端部32の反対側の端部はPC部材1の端面から突出する場合と図1に示すように端面寄りの上面から突出する場合がある。   When a tension force is introduced into the tension member 3 including a section located in the PC member 1, the fixing end portion 32 (transmission material 33) is used as a tensile force transmission member without fixing the protruding section 31 to the end surface of the PC member 1. 5 (fixing material 53), and the tension force of the tension material 3 may be directly transmitted to the tensile force transmission member 5 (claim 4). In this case, the time for introducing the tension force to the tension member 3 is before the joint concrete 4 is cast and after the strength is developed. The tension force applied to the tension member 3 is introduced from the end opposite to the fixing end 32 engaged with the tensile force transmission member 5. The end opposite to the fixing end 32 may protrude from the end surface of the PC member 1 or may protrude from the upper surface near the end surface as shown in FIG.

接合部コンクリート4の打設前に緊張材3に緊張力を導入する場合、引張力伝達部材5がPC部材1の端面側へ移動しようとする力を受けることになるが、引張力伝達部材5をPC部材1の端面に係止させておくか、支持部材2の天端に固定しておく等、引張力伝達部材5の移動を拘束しておくことで、移動は阻止される。PC部材1の軸方向両側の接合部コンクリート4の強度発現後に緊張力を導入する場合、図1に示すように緊張材3の接合部コンクリート4側と反対側の端部をPC部材1の他方の端面寄りの上面に突出させておくことで、緊張力が導入される。   When a tensile force is introduced into the tension member 3 before the joint concrete 4 is placed, the tensile force transmission member 5 receives a force to move toward the end face side of the PC member 1, but the tensile force transmission member 5 Is restrained by the movement of the tensile force transmitting member 5 such as by being locked to the end surface of the PC member 1 or being fixed to the top end of the support member 2. When the tension is introduced after the strength of the joint concrete 4 on both sides in the axial direction of the PC member 1 is developed, the end of the tension member 3 opposite to the joint concrete 4 side is connected to the other end of the PC member 1 as shown in FIG. Tension is introduced by projecting it to the upper surface near the end face.

引張力伝達部材5は具体的にはPC部材1の軸方向を向く引張材52と引張材52の軸方向両側に、緊張材3の定着端部32が係合し得る定着材53を有する、複数本の引張力伝達材51を備える(請求項5)。支持部材2の天端上では、少なくとも2本の引張伝達材51、51が対になり、1本の緊張材3の突出区間31の幅方向両側に並列して配置され、2本の引張伝達材51の両定着材53、53に1本の緊張材3の定着端部32が係合する(請求項5)。定着材53は引張材52に接続される場合と、引張材52に一体的に形成される場合がある。   Specifically, the tensile force transmission member 5 has a tension member 52 facing the axial direction of the PC member 1 and fixing members 53 to which the fixing end portions 32 of the tension member 3 can be engaged on both sides of the tension member 52 in the axial direction. A plurality of tensile force transmission members 51 are provided (claim 5). On the top end of the support member 2, at least two tension transmission members 51, 51 are paired and arranged in parallel on both sides in the width direction of the protruding section 31 of one tension member 3. The fixing end 32 of one tension member 3 is engaged with both the fixing members 53 and 53 of the material 51 (Claim 5). The fixing material 53 may be connected to the tension material 52 or may be formed integrally with the tension material 52.

「係合し得る」とは、支持部材2上でPC部材1が対向して設置されず、一方向片側にのみ設置される場合に、その一方向片側のPC部材1の緊張材3の定着端部32がその側(一方側)の定着材53に係合し、他方側の定着材53には定着端部32が係合しない状態になることを含む意味である。その場合の他方側の定着材53は接合部コンクリート4中に埋設され、定着されることで、一方側の定着材53に伝達される定着端部32からの引張力を支圧力として接合部コンクリート4に伝達し、定着状態を維持するアンカーとして機能する。   “Possible to engage” means that when the PC member 1 is not installed on the support member 2 so as to be opposed to the PC member 1 but only on one side in one direction, the tension member 3 of the PC member 1 on the one direction one side is fixed This means that the end portion 32 engages with the fixing material 53 on that side (one side) and the fixing end portion 32 does not engage with the fixing material 53 on the other side. In that case, the other side fixing material 53 is embedded and fixed in the joint portion concrete 4, so that the tensile force from the fixing end portion 32 transmitted to the one side fixing material 53 is used as a supporting pressure to join the joint concrete. 4 and functions as an anchor that maintains the fixing state.

この場合、引張力伝達部材5が2本の引張力伝達材51、51から構成され、2本の引張伝達材51、51の両定着材63、53に1本の緊張材3の定着端部32が係合することで、緊張材3の引張力が幅方向両側の引張力伝達材51、51に分散し、均等に負担される。この結果、1本の緊張材3の引張力が1本の引張力伝達材51に伝達される場合より定着端部32の係合状態での安定性が増すため、緊張材3に緊張力が導入された場合の緊張力の引張力伝達部材5への伝達効率も向上する。   In this case, the tensile force transmission member 5 is composed of two tensile force transmission materials 51, 51, and the fixing end portion of one tension material 3 on both the fixing materials 63, 53 of the two tensile transmission materials 51, 51. When 32 is engaged, the tensile force of the tension member 3 is distributed to the tensile force transmission members 51 and 51 on both sides in the width direction, and is equally borne. As a result, since the stability in the engaged state of the fixing end 32 is increased compared to the case where the tensile force of one tension member 3 is transmitted to one tension force transmission member 51, the tension member 3 has a tension force. When it is introduced, the transmission efficiency of the tension force to the tensile force transmission member 5 is also improved.

引張力伝達部材5は支持部材2上に載置されるPC部材1の軸方向に応じ、PC部材1の軸方向を向いて少なくとも一方向を向く。支持部材2上にPC部材1、1が二方向を向いて載置される場合には引張力伝達部材5も二方向の引張力伝達材51、51から組み立てられる。引張力伝達材51に緊張材3の引張力が接合部コンクリート4の強度発現前から伝達される場合には、前記のように引張力伝達部材5が支持部材2上で移動しないよう、支持部材2に、または緊張材3が埋設されたPC部材1に拘束される。   The tensile force transmission member 5 faces at least one direction toward the axial direction of the PC member 1 according to the axial direction of the PC member 1 placed on the support member 2. When the PC members 1 and 1 are placed on the support member 2 facing in two directions, the tensile force transmission member 5 is also assembled from the tensile force transmission members 51 and 51 in two directions. When the tensile force of the tension member 3 is transmitted to the tensile force transmission member 51 before the strength of the joint concrete 4 is developed, the support member is prevented from moving on the support member 2 as described above. 2 or the PC member 1 in which the tendon 3 is embedded.

PC部材が設置される支持部材上でPC部材の端面から突出した緊張材の定着端部を接合部コンクリート中に埋設される引張力伝達部材に引張力を伝達可能な状態に係合させ、接合部コンクリートを打設してPC部材と接合部コンクリートを接合するため、定着端部が接合部コンクリート内を横切るように定着端部を配置する必要がなく、定着端部をPC部材の端面に近い位置に配置すればよい。この結果、接合部コンクリート内で対向する方向の、または交差する方向の緊張材の定着端部同士を干渉させる必要がなくなり、各方向の緊張材の定着端部間の水平方向の位置を調整する必要がなくなる。   On the support member on which the PC member is installed, the fixing end of the tension material protruding from the end surface of the PC member is engaged with the tensile force transmitting member embedded in the joint concrete so that the tensile force can be transmitted and joined. Since the concrete is placed and the PC member and the joint concrete are joined, there is no need to arrange the fixing end so that the fixing end crosses the inside of the joint concrete, and the fixing end is close to the end face of the PC member. What is necessary is just to arrange | position to a position. As a result, it is no longer necessary to cause the fixing ends of the tension members in the opposite direction or intersecting directions in the joint concrete to interfere with each other, and the horizontal position between the fixing ends of the tension members in each direction is adjusted. There is no need.

支持部材上に対向するPC部材の端部と引張力伝達部材を設置したときの様子を示した立面図であり、(a)は緊張材の突出区間をPC部材の端面に定着しない場合、(b)は定着した場合である。It is the elevation which showed a mode when installing the end part of the PC member which opposes on a support member, and a tensile force transmission member, (a) is a case where the projecting section of a tendon is not fixed to the end face of a PC member, (B) is a case where it fixes. (a)は支持部材の天端上に引張力伝達部材と対向するPC部材の端部を載置し、定着端部と引張力伝達部材を係合させたときの、接合部コンクリート打設前の様子を示した平面図、(b)は(a)のx−x線矢視図(断面図)である。(A) Before placing the joint concrete when placing the end of the PC member facing the tensile force transmitting member on the top end of the support member and engaging the fixing end with the tensile force transmitting member The top view which showed the mode of (b) is a xx arrow directional view (sectional drawing) of (a). (a)は支持部材上に引張力伝達部材を先行して設置した場合の、引張力伝達部材の設置状態を示した平面図、(b)は(a)のx−x線矢視図である。(A) is the top view which showed the installation state of the tensile force transmission member at the time of installing a tensile force transmission member ahead on a support member, (b) is an xx arrow line view of (a). is there. (a)は引張力伝達部材の設置後、二方向に対向するPC部材の内、各方向の一方のPC部材を設置したときの様子を示した平面図、(b)は対向する他方のPC部材を設置したときの(a)のx−x線矢視図である。(A) is the top view which showed the mode when one PC member of each direction was installed among the PC members which oppose two directions after installation of a tensile force transmission member, (b) is the other PC which opposes It is an xx arrow line view of (a) when a member is installed. (a)は二方向に対向するPC部材を設置したときの様子を示した平面図、(b)は(a)のx−x線矢視図である。(A) is a top view which showed the mode when the PC member which opposes two directions was installed, (b) is a xx line arrow directional view of (a). (a)は支持部材上に二方向に対向するPC部材を先行して設置した場合の、PC部材の設置状態を示した平面図、(b)は(a)のx−x線矢視図である。(A) is the top view which showed the installation state of PC member at the time of installing in advance the PC member which opposes two directions on a support member, (b) is the xx arrow directional view of (a). It is. (a)は接合部コンクリートの打設前にPC部材の端面に定着されている突出区間の定着を解除する方法の一例を示した縦断面図、(b)はPC部材での(a)の位置を示した縦断面図である。(A) is the longitudinal cross-sectional view which showed an example of the method of canceling | releasing fixation of the protrusion area currently fixed to the end surface of PC member before placement of joint part concrete, (b) of (a) in PC member It is the longitudinal cross-sectional view which showed the position. 図7に示す突出区間の定着の解除のための部品を備えたPC部材と緊張材の緊張の様子を示した縦断面図である。It is the longitudinal cross-sectional view which showed the mode of tension | tensile_strength of PC member provided with the part for cancellation | release of fixation of the protrusion area shown in FIG. 7, and a tension material.

図1−(a)、(b)は内部に緊張材3が配置され、緊張材3の軸方向の端部が端面から突出したプレキャストコンクリート部材(以下、PC部材)1を、PC部材1の軸方向両端部の位置に設置(立設)された柱部材等の支持部材2の天端上に設置し、支持部材2上に現場で打設される接合部コンクリート4に接合する方法の施工要領を示す。PC部材1の軸方向の端面からは緊張材3が突出し、その端部の定着端部32を支持部材2の天端上に載置される引張力伝達部材5に係合させた状態で接合部コンクリート4が打設され、定着端部32を含む緊張材3の突出区間31と引張力伝達部材5が接合部コンクリート4中に埋設される。   1- (a) and (b) show a precast concrete member (hereinafter referred to as a PC member) 1 in which a tension member 3 is arranged inside and an end portion in the axial direction of the tension member 3 protrudes from the end surface. Construction of a method of installing on the top end of the support member 2 such as a pillar member installed (standing) at both axial end positions and joining the joint concrete 4 placed on the support member 2 in the field Show the point. The tension member 3 protrudes from the end surface in the axial direction of the PC member 1 and is joined in a state where the fixing end portion 32 of the end portion is engaged with the tensile force transmission member 5 placed on the top end of the support member 2. The partial concrete 4 is placed, and the protruding section 31 of the tension member 3 including the fixing end 32 and the tensile force transmitting member 5 are embedded in the joint concrete 4.

緊張材3には緊張力が導入されることがあるため、主にPC鋼材が使用されるが、繊維強化プラスチック等、緊張力の導入が可能な材料も使用される。PC鋼材の場合、PC部材1のコンクリート、または接合部コンクリート4との付着が切れる区間にはアンボンドPC鋼材の他、図7−(a)に示す、予め緊張材3の周囲にシース34が塗布等されたプレグラウトPC鋼材が使用される。図1−(a)は緊張材3の突出区間31をPC部材1の端面に定着しない場合、(b)は図7、図8に示すように定着した場合である。   Since tension may be introduced into the tension member 3, PC steel is mainly used, but materials capable of introducing tension, such as fiber reinforced plastic, are also used. In the case of PC steel, in addition to the unbonded PC steel, a sheath 34 is applied in advance around the tension material 3 in the section where the adhesion of the PC member 1 to the concrete or the joint concrete 4 is cut. Equal pregrout PC steel is used. 1- (a) shows a case where the protruding section 31 of the tendon 3 is not fixed to the end face of the PC member 1, and FIG. 1 (b) shows a case where the protruding section 31 is fixed as shown in FIGS.

緊張材3の全長の内、少なくともPC部材1の端面から突出した突出区間31の周面と接合部コンクリート4との付着が切れる。コンクリートとの付着が切れる区間は突出区間31のみの場合と、突出区間31とPC部材1内の区間を合わせた全長の場合がある。突出区間31のみの付着が切れる場合、緊張力は突出区間31に導入される。緊張材3の全長の付着が切れる場合、基本的には緊張力は緊張材3の全長に導入されるが、図1−(b)のように突出区間31をPC部材1の端面に定着した場合には、突出区間31には緊張力を導入せずに、PC部材1内の区間にのみ緊張力を導入することもできる。   The adhesion between the peripheral surface of the projecting section 31 projecting from at least the end surface of the PC member 1 and the joint concrete 4 is cut out of the total length of the tendon 3. The section where the adhesion with concrete is cut may be only the projecting section 31 or the total length of the projecting section 31 and the section in the PC member 1 combined. When only the protruding section 31 is not attached, the tension is introduced into the protruding section 31. When the attachment of the entire length of the tension material 3 is cut, the tension force is basically introduced to the entire length of the tension material 3, but the protruding section 31 is fixed to the end surface of the PC member 1 as shown in FIG. In this case, it is possible to introduce tension force only into the section in the PC member 1 without introducing tension force into the protruding section 31.

緊張材3は1本のPC部材1の軸方向両端面間に配置されるとは限らず、図1に示すように緊張材3の一方の定着端部32を端面から支持部材2上へ突出させ、他方の端部をPC部材1の上面に突出させ、上面に定着することもある。この場合、図1−(a)に示すように支持部材2上の定着端部32を引張力伝達部材5に係合させた後に、緊張材3の他方の端部側から緊張材3に緊張力を導入し、PC部材1の上面に定着することができるため、突出区間31を含む緊張材3の全長に緊張力を導入することができる。(b)に示すように突出区間31をPC部材1の端面に定着、または仮定着させておく場合には、緊張材3のPC部材1内の区間にのみ、緊張力を導入することができる。   The tension material 3 is not necessarily disposed between both axial end surfaces of one PC member 1, and one fixing end 32 of the tension material 3 protrudes from the end surface onto the support member 2 as shown in FIG. 1. The other end may protrude from the upper surface of the PC member 1 and be fixed on the upper surface. In this case, as shown in FIG. 1- (a), after the fixing end portion 32 on the support member 2 is engaged with the tensile force transmission member 5, the tension material 3 is tensioned from the other end side of the tension material 3. Since the force can be introduced and fixed on the upper surface of the PC member 1, the tension force can be introduced to the entire length of the tension member 3 including the protruding section 31. When the protruding section 31 is fixed or assumed to be attached to the end face of the PC member 1 as shown in (b), tension can be introduced only into the section of the tension member 3 in the PC member 1. .

定着端部32は緊張材3に生じる、緊張力を含む引張力を接合部コンクリート4に伝達する機能を備える。「引張力を伝達する定着端部32の機能」は、定着端部32が支持部材2の天端上に載置される引張力伝達部材5に緊張材3に生じる引張力の作用の向きに係合することで、緊張材3の引張力を引張力伝達部材5に伝達する能力のことを言う。「緊張材3に生じる引張力」は緊張材3に平常時に生じていない引張力で、地震時等にPC部材1と接合部コンクリート4との間に両者が分離しようとする力を受けたときに緊張材3に生じる引張力を言う。   The fixing end portion 32 has a function of transmitting a tensile force including a tension force generated in the tension material 3 to the joint concrete 4. The “function of the fixing end portion 32 for transmitting the tensile force” refers to the direction of the action of the tensile force generated in the tension member 3 on the tensile force transmitting member 5 on which the fixing end portion 32 is placed on the top end of the support member 2. By engaging, it refers to the ability to transmit the tensile force of the tendon 3 to the tensile force transmission member 5. “Tensile force generated in the tension material 3” is a tensile force that is not normally generated in the tension material 3, and when the two members receive a force to separate between the PC member 1 and the joint concrete 4 during an earthquake or the like. Refers to the tensile force generated in the tendon 3.

PC部材1と接合部コンクリート4は以下の複数の工程を経て互いに接合される。すなわち、引張力伝達部材5を支持部材2上に載置する工程と、PC部材1の軸方向端部を支持部材2上に載置する工程と、図2に示すように緊張材3の定着端部32を引張力伝達部材5に互いに係合させた状態で接合部コンクリート4を打設する工程とを経てPC部材1と接合部コンクリート4が接合される。図2〜図5中、支持部材2上の外側の鎖線は接合部コンクリート4の打設領域を示すが、PC部材1の軸方向の端面の位置でもある。図2〜図5ではPC部材1を省略している。   The PC member 1 and the joint concrete 4 are joined to each other through the following steps. That is, the step of placing the tensile force transmission member 5 on the support member 2, the step of placing the axial end of the PC member 1 on the support member 2, and the fixing of the tension member 3 as shown in FIG. The PC member 1 and the joint concrete 4 are joined through the step of placing the joint concrete 4 in a state where the end portions 32 are engaged with the tensile force transmission member 5. 2 to 5, an outer chain line on the support member 2 indicates a placement area of the joint concrete 4, but is also a position of an end face in the axial direction of the PC member 1. 2 to 5, the PC member 1 is omitted.

複数の工程の順序は問われず、並行して進められることもある。図2は柱部材である支持部材2上で水平二方向に梁部材であるPC部材1、1が対向して設置される場合の支持部材2の天端上に設置された引張力伝達部材5に、PC部材1の端面から突出した緊張材3の定着端部32が係合したときの様子を示す。支持部材2上のPC部材1は一方向にのみ対向して設置される場合の他、一方向の片側にのみ設置される場合もあるが、以下では主に図2に示す接合例を説明する。   The order of the plurality of steps is not limited and may be performed in parallel. FIG. 2 shows a tensile force transmission member 5 installed on the top end of the support member 2 when the PC members 1 and 1 which are beam members are installed facing each other in two horizontal directions on the support member 2 which is a column member. 5 shows a state where the fixing end 32 of the tension member 3 protruding from the end face of the PC member 1 is engaged. The PC member 1 on the support member 2 may be installed only on one side in one direction in addition to the case where the PC member 1 is installed facing only in one direction. .

図3〜図5は支持部材2の天端上に引張力伝達部材5を先行して載置した場合の施工手順例を示す。図3は支持部材2上に引張力伝達部材5を載置したときの状況を示す。   3 to 5 show examples of construction procedures when the tensile force transmission member 5 is placed on the top end of the support member 2 in advance. FIG. 3 shows a situation when the tensile force transmission member 5 is placed on the support member 2.

引張力伝達部材5は図3に示すようにPC部材1の軸方向を向く引張材52と引張材52の軸方向両側に、緊張材3の定着端部32が係合し得る定着材53を有する、複数本の引張力伝達材51を備える。言い換えれば、引張力伝達部材5は少なくとも2本の引張力伝達材51、51から構成され、1本の引張力伝達材51が引張材52とその両側に配置されたプレート状等の定着材53、53を有する。   As shown in FIG. 3, the tensile force transmitting member 5 has a tensile member 52 facing the axial direction of the PC member 1 and fixing members 53 to which the fixing end portions 32 of the tensile member 3 can be engaged on both sides in the axial direction of the tensile member 52. A plurality of tensile force transmission members 51 are provided. In other words, the tensile force transmission member 5 is composed of at least two tensile force transmission materials 51, 51, and one tensile force transmission material 51 is arranged on the tensile material 52 and the plate-like fixing material 53 arranged on both sides thereof. , 53.

引張力伝達部材5を構成する2本以上の引張力伝達材51は、PC部材1の幅方向に並列する緊張材3、3の内、1本の緊張材3単位では少なくともPC部材1の幅方向に並列する複数本の引張力伝達材51から成立する。後述のように緊張材3がPC部材1の成方向(高さ方向)にも並列して配置される場合には、引張力伝達材51はPC部材1の幅方向に並列しながら、高さ方向にも複数本、配列することもある。この他、図2〜図5に示すようにPC部材1、1が支持部材2上で二方向に載置される場合には、支持部材2上で二方向に交差する複数本の引張力伝達材51から引張力伝達部材5が組み立てられることもある。   The two or more tensile force transmission members 51 constituting the tensile force transmission member 5 are at least the width of the PC member 1 in one tension member 3 unit among the tension members 3 and 3 juxtaposed in the width direction of the PC member 1. It consists of a plurality of tensile force transmission members 51 arranged in parallel in the direction. As will be described later, when the tension members 3 are arranged in parallel in the direction of formation (height direction) of the PC member 1, the tensile force transmission material 51 is arranged in parallel with the width direction of the PC member 1, and the height. There may be a plurality of lines arranged in the direction. In addition, as shown in FIGS. 2 to 5, when the PC members 1 and 1 are placed in two directions on the support member 2, a plurality of tensile force transmissions intersecting in two directions on the support member 2. The tensile force transmission member 5 may be assembled from the material 51.

図示するように1本のPC部材1の端面から突出する緊張材3がPC部材1の成方向(高さ方向)に複数本、配置される場合には、それに対応し、引張力伝達材51も高さ方向に少なくとも緊張材3の配置本数分、複数段、配置される。図2以下では1本の緊張材3からの引張力を高さ方向にも分散させて引張力伝達部材5に伝達できるよう、1本の緊張材3に付き、その緊張材3を上下から挟み込む2本の引張力伝達材51、51を配置し、組み合わせている。   As shown in the figure, when a plurality of tension members 3 protruding from the end face of one PC member 1 are arranged in the direction of formation (height direction) of the PC member 1, a tensile force transmitting material 51 corresponding thereto is arranged. Are arranged in a plurality of stages at least as many as the number of the tendon members 3 in the height direction. In FIG. 2 and subsequent figures, the tension material 3 is attached to one tension material 3 so that the tension force from one tension material 3 can be distributed in the height direction and transmitted to the tensile force transmission member 5, and the tension material 3 is sandwiched from above and below. Two tensile force transmission materials 51, 51 are arranged and combined.

この場合、図3−(b)に示すように高さ方向に間隔を置いて配置され、平面上、重なる複数本の引張力伝達材51、51に定着材53が跨り、定着材53は高さ方向に配置される複数本の引張力伝達材51を互いに連結する働きをする。図面では特に、緊張材3を高さ方向に2本、配置していることに伴い、各緊張材3の上下に引張力伝達材51、51を配置し、平面上、重なる位置に4本の引張力伝達材51を配置している。この同一位置で重なる4本の引張力伝達材51を1個(1枚)の定着材53に挿通させ、4本の引張力伝達材51を一本化させている。   In this case, as shown in FIG. 3- (b), the fixing material 53 is disposed across the plurality of tensile force transmitting materials 51, 51 that are arranged at an interval in the height direction and overlap each other on the plane. The plurality of tensile force transmission members 51 arranged in the vertical direction serve to connect each other. In particular, in the drawing, as two tension members 3 are arranged in the height direction, tensile force transmission materials 51 and 51 are arranged above and below each tension member 3, and four tension members 3 are overlapped on a plane. A tensile force transmission material 51 is arranged. The four tensile force transmitting materials 51 that overlap at the same position are inserted into one (one) fixing material 53 to unify the four tensile force transmitting materials 51.

支持部材2の天端上では、前記のように複数本の引張力伝達材51の内、少なくとも2本の引張伝達材51、51が対になって1本の緊張材3の突出区間31の幅方向両側に配置されるように載置され、2本の引張伝達材51、51の両定着材53、53に1本の緊張材3の定着端部32が係合する。引張力伝達材51の定着材53に緊張材3の定着端部32が緊張材3の引張力の作用の向きに係合することで、引張力伝達材51は接合部コンクリート4内では緊張材3の引張力を負担し、接合部コンクリート4に伝達する役目を果たす。   On the top end of the support member 2, as described above, at least two of the tensile force transmission members 51, 51, 51 are paired with the protruding section 31 of the one tension member 3. It is placed so as to be arranged on both sides in the width direction, and the fixing end portion 32 of one tension member 3 is engaged with both the fixing members 53 and 53 of the two tension transmission members 51 and 51. When the fixing end portion 32 of the tension material 3 is engaged with the fixing material 53 of the tensile force transmission material 51 in the direction of the action of the tensile force of the tension material 3, the tensile force transmission material 51 is in the joint concrete 4. It bears the tensile force of 3 and plays the role of transmitting it to the joint concrete 4.

定着材53は例えば雄ねじの切られた引張材52が定着材53を挿通し、図示するように定着材53のPC部材1側から引張材52に螺合するナット54で引張材52に、PC部材1側への移動を拘束されることにより、もしくは引張材52が定着材53に螺入することにより引張材52に固定状態で接続される。または引張材52の製作時に引張材52の一部として節状に成型されることにより一体的に形成される。図3〜図5では支持部材2上への引張力伝達部材5とPC部材1の載置後に、引張材52の軸方向に定着材53の位置を調整できるよう、定着材53のPC部材1側にナット54を螺合させている。「定着材53のPC部材1側」は、定着材53に係合する定着端部32を有する緊張材3が配置されたPC部材1側を指す。   For example, the fixing material 53 is formed by inserting a tension member 52 having a male thread into the tension member 52 with a nut 54 inserted into the tension member 52 from the PC member 1 side of the fixing member 53 as shown in the figure. When the movement to the member 1 side is restricted, or the tensile material 52 is screwed into the fixing material 53, it is connected to the tensile material 52 in a fixed state. Alternatively, they are integrally formed by being molded into a node shape as a part of the tension material 52 when the tension material 52 is manufactured. 3 to 5, the PC member 1 of the fixing material 53 is adjusted so that the position of the fixing material 53 can be adjusted in the axial direction of the tensile material 52 after the tensile force transmitting member 5 and the PC member 1 are placed on the support member 2. A nut 54 is screwed to the side. The “PC member 1 side of the fixing material 53” refers to the PC member 1 side on which the tension member 3 having the fixing end portion 32 engaged with the fixing material 53 is disposed.

図3〜図5では各PC部材1の端面から、幅方向に並列する2本の緊張材3、3が突出していることに対応し、支持部材2上に3本の引張力伝達材51を並列させて配置している。各引張力伝達材51は独立して支持部材2上に設置されてもよいが、設置時に隣接する引張力伝達材51、51間の間隔の調整等の作業を要することから、図面では二方向の全引張力伝達材51を連結し、支持部材2上の引張力伝達部材5を1個のユニットとして組み立てている。   3 to 5 correspond to the fact that two tension members 3, 3 juxtaposed in the width direction protrude from the end face of each PC member 1, and three tensile force transmission members 51 are provided on the support member 2. They are arranged in parallel. Each tensile force transmission material 51 may be independently installed on the support member 2. However, since the operation of adjusting the distance between the adjacent tensile force transmission materials 51, 51 is required at the time of installation, two directions are shown in the drawing. Are connected together, and the tensile force transmission member 5 on the support member 2 is assembled as one unit.

具体的には各PC部材1の幅方向両側に位置する引張力伝達材51が交差(直交)する方向の引張力伝達材51と交差する部分、すなわち二方向の2本の引張力伝達材51、51が交差する部分に、二方向に接合用の片を有する山形鋼等の連結材55を鉛直方向に向けて配置している。この連結材55の各片に形成した挿通孔に二方向の引張力伝達材51、51を挿通させることで、二方向の引張力伝達材51、51を連係させている。PC部材1が図示するように二方向に対向する場合、連結材55は4箇所に配置される。   Specifically, the portions where the tensile force transmission materials 51 located on both sides in the width direction of each PC member 1 intersect with the tensile force transmission material 51 in the direction intersecting (orthogonal), that is, two tensile force transmission materials 51 in two directions. , 51 are arranged with a connecting material 55 such as angle steel having joining pieces in two directions facing the vertical direction. The two-way tensile force transmitting members 51 and 51 are linked by inserting the two-way tensile force transmitting members 51 and 51 through the insertion holes formed in each piece of the connecting member 55. When the PC member 1 faces in two directions as shown in the figure, the connecting members 55 are arranged at four locations.

上記のように引張力伝達材51が高さ方向に複数本、配置される場合には、図3−(b)に示すようにこの高さ方向に間隔を置いて配置され、平面上、重なる複数本の引張力伝達材51を1本の連結材55が連結することができる。但し、連結材55は幅方向の外側に位置する二方向の引張力伝達材51、51を連結できるだけであるから、幅方向の中央に位置する引張力伝達材51は例えばそれに交差する方向の引張力伝達材51に結束線で結束される等により連結され、引張力伝達部材5として組み立てられる。   When a plurality of tensile force transmission members 51 are arranged in the height direction as described above, they are arranged at intervals in the height direction as shown in FIG. A plurality of tensile force transmission members 51 can be connected to one connecting member 55. However, since the connecting material 55 can only connect the two-direction tensile force transmitting materials 51 and 51 positioned outside in the width direction, the tensile force transmitting material 51 positioned at the center in the width direction is, for example, a tensile force in a direction crossing it. The tensile force transmission member 5 is assembled by being connected to the force transmission member 51 by being bound with a binding wire or the like.

前記のように引張力伝達材51は接合部コンクリート4内で緊張材3の引張力を負担しながら、接合部コンクリート4に伝達する機能を有するから、図3に示すように支持部材2の天端上に引張力伝達部材5を載置したとき、最下部に位置する引張力伝達材51と天端との間に引張力伝達材51の被り分の空隙を確保する必要がある。この関係で、引張力伝達部材5の載置時に最下部の引張力伝達材51が天端から浮くよう、連結材55の長さを複数段分の引張力伝達材51の高さより大きくし、連結材55の下端を天端に接触させることで、最下部の引張力伝達材51と天端との間の空隙を確保している。この空隙確保の役目は定着材53が果たすこともできる。   As described above, the tensile force transmission member 51 has a function of transmitting the tensile force of the tension member 3 in the joint concrete 4 while transmitting it to the joint concrete 4. When the tensile force transmitting member 5 is placed on the end, it is necessary to secure a gap for the covering of the tensile force transmitting member 51 between the tensile force transmitting member 51 located at the lowermost portion and the top end. In this relationship, the length of the connecting material 55 is made larger than the height of the tensile force transmitting material 51 for a plurality of steps so that the lowermost tensile force transmitting material 51 floats from the top when the tensile force transmitting member 5 is placed. A gap between the lowermost tensile force transmitting member 51 and the top end is secured by bringing the lower end of the connecting member 55 into contact with the top end. The fixing material 53 can also fulfill the role of securing the gap.

図3に示すように支持部材2の天端上に引張力伝達部材5を先行して載置した後、図4、図5に示すように支持部材2の天端上にPC部材1の端部を載置し、図2に示すように緊張材3の定着端部32を引張力伝達部材5の定着材53に、緊張材3の引張力の作用の向きに係合させる。定着端部32は図示するような圧着グリップ等の定着体が接続された部分(区間)を指し、この定着体の一部を定着材53に係合させることもあるが、図面では定着体のPC部材1側にプレート状の伝達材33を接続(固定)し、この伝達材33を定着材53に係合させている。伝達材33の定着端部32への固定方法、あるいは形成方法は引張力伝達材51の定着材53と同様、問われない。図4−(b)では(a)中の並列する緊張材3、3が支持部材2天端の中心を挟んで対向して配置されている様子を示している。   After the tensile force transmitting member 5 is placed on the top end of the support member 2 as shown in FIG. 3, the end of the PC member 1 is placed on the top end of the support member 2 as shown in FIGS. The fixing end 32 of the tension member 3 is engaged with the fixing member 53 of the tensile force transmitting member 5 in the direction of the action of the tensile force of the tension member 3 as shown in FIG. The fixing end portion 32 indicates a portion (section) to which a fixing body such as a crimping grip as shown in the figure is connected, and a part of the fixing body may be engaged with the fixing material 53. A plate-shaped transmission material 33 is connected (fixed) to the PC member 1 side, and this transmission material 33 is engaged with the fixing material 53. The fixing method of the transmission material 33 to the fixing end portion 32 or the formation method is not limited as in the fixing material 53 of the tensile force transmission material 51. FIG. 4- (b) shows a state in which the tension members 3 and 3 arranged in parallel in (a) are arranged to face each other with the center of the top end of the support member 2 interposed therebetween.

定着端部32(伝達材33)は定着材53へは、緊張材3に緊張力を導入した状態で係合させられる場合と、緊張力の導入をせずに係合させられる場合がある。定着端部32の定着材53への係合時に緊張材3に緊張力が導入される場合には、係合時の時点から定着端部32と定着材53間に、緊張力の反力としての圧縮力が生じた状態にある。この場合、引張力伝達部材5が緊張材3からの緊張力を受けて緊張材3が突出したPC部材1側へ移動する状態にあれば、引張力伝達部材5を支持部材2とPC部材1のいずれかに係止させる等、引張力伝達部材5を拘束することが必要になる。図1−(a)に示すように緊張材3への緊張力の導入が接合部コンクリート4の強度発現後であれば、引張力伝達部材5の拘束は必要ではない。   The fixing end 32 (transmission member 33) may be engaged with the fixing member 53 in a state where a tension force is introduced into the tension member 3, or may be engaged without introducing the tension force. When a tension force is introduced into the tension member 3 when the fixing end portion 32 is engaged with the fixing material 53, a reaction force of the tension force is generated between the fixing end portion 32 and the fixing material 53 from the time of engagement. It is in a state where a compression force is generated. In this case, if the tensile force transmission member 5 receives the tension force from the tension material 3 and moves to the PC member 1 side from which the tension material 3 protrudes, the tensile force transmission member 5 is connected to the support member 2 and the PC member 1. It is necessary to restrain the tensile force transmission member 5 such as locking to any of the above. As shown in FIG. 1- (a), if the introduction of the tension force to the tension member 3 is after the strength of the joint concrete 4 has been developed, the tension force transmitting member 5 is not required to be restrained.

定着端部32の定着材53への係合時に緊張材3に緊張力が導入されない場合には、地震時等にPC部材1と接合部コンクリート4の境界面が分離しようとするときに緊張材3に引張力が生じ、この引張力が分離しようとした境界面を復元させる働きをする。係合時に緊張力が導入されている場合の緊張力も地震時等には同じように作用する。   If tension force is not introduced into the tension member 3 when the fixing end 32 is engaged with the fixing member 53, the tension member is used when the boundary surface between the PC member 1 and the joint concrete 4 is to be separated during an earthquake or the like. 3, a tensile force is generated, and this tensile force works to restore the boundary surface to be separated. When tension is introduced at the time of engagement, the tension also acts in the same way during an earthquake.

支持部材2上へのPC部材1の載置時に、同時に定着端部32を定着材53に係合させることができる場合を除き、定着材53は図3〜図5に示すように予め下部材2の外周寄り(PC部材1の端面側)へ移動させられており、PC部材1の載置後に図2に示すように定着端部32側へ移動させられ、定着端部32に係合させられる。   Except for the case where the fixing end portion 32 can be simultaneously engaged with the fixing material 53 when the PC member 1 is placed on the support member 2, the fixing material 53 is previously formed as a lower member as shown in FIGS. 3 to 5. 2 is moved toward the outer periphery of the PC member 1 (the end face side of the PC member 1), and after the PC member 1 is placed, it is moved to the fixing end portion 32 side as shown in FIG. It is done.

図2に示す状況で、支持部材2の天端上に接合部コンクリート4の打設領域を区画するせき板を組み立てると共に、せき板の内側に必要な配筋をした後、接合部コンクリート4が打設される。   In the situation shown in FIG. 2, after assembling a slat that divides the placement area of the joint concrete 4 on the top end of the support member 2 and arranging the necessary reinforcement inside the slat, the joint concrete 4 is It is cast.

図6は支持部材2の天端上に二方向、4本のPC部材1を引張力伝達部材5に先行して載置した場合に、天端上に4本のPC部材1の突出区間31が配置された状況を示す。図6の状況からは二方向の突出区間31の合間を縫うように引張力伝達部材5を支持部材2上に載置することで、図5に示す状況になる。その後、定着材53を定着端部32側へ移動させ、定着端部32に係合させることにより図2に示すPC部材1と引張力伝達部材5の設置が完了した状態になる。その後、接合部コンクリート4が打設される。   FIG. 6 shows the protruding sections 31 of the four PC members 1 on the top end when the four PC members 1 are placed in two directions on the top end of the support member 2 prior to the tensile force transmitting member 5. Indicates the situation where is placed. From the situation of FIG. 6, the situation shown in FIG. 5 is obtained by placing the tensile force transmission member 5 on the support member 2 so as to sew between the protruding sections 31 in the two directions. Thereafter, the fixing member 53 is moved to the fixing end portion 32 side and engaged with the fixing end portion 32, thereby completing the installation of the PC member 1 and the tensile force transmitting member 5 shown in FIG. Thereafter, the joint concrete 4 is placed.

図7−(a)は緊張材3に緊張力を導入し、突出区間31をPC部材1の端面に定着(仮定着)させた場合に、緊張状態の緊張材3の定着端部32を引張力伝達部材5の定着材53に係合させた状態から、PC部材1の端面に定着されていた突出区間31の定着を解除する場合の具体的な作業例を示す。   FIG. 7- (a) introduces a tension force to the tension member 3 and pulls the fixing end 32 of the tension member 3 in the tension state when the protruding section 31 is fixed (assumed) on the end surface of the PC member 1. A specific work example in the case where the fixing of the protruding section 31 fixed on the end face of the PC member 1 is released from the state in which the force transmitting member 5 is engaged with the fixing material 53 will be described.

突出区間31の定着の解除は図8に示す、PC部材1内に離脱可能に配置されていた被定着材7をPC部材1から離脱させることで可能になる。図7−(b)はPC部材1及び支持部材2と被定着材7の関係を示す。接合部コンクリート4内に位置する突出区間31はシース34に包囲されることで、コンクリートとの付着が切れているため、被定着材7のPC部材1からの離脱の時期は問われず、接合部コンクリート4の打設前から接合部コンクリート4の強度発現後までの間のいずれかに行われる。   The fixing of the protruding section 31 can be released by removing the fixing material 7 detachably disposed in the PC member 1 as shown in FIG. FIG. 7B shows the relationship between the PC member 1 and the support member 2 and the fixing material 7. Since the protruding section 31 located in the joint concrete 4 is surrounded by the sheath 34, the adhesion to the concrete is cut off, so that the timing of detachment of the fixing material 7 from the PC member 1 is not limited. It is performed anywhere before the concrete 4 is placed and after the strength of the joint concrete 4 is developed.

図7に示す例ではPC部材1の端面からPC部材1の内部へケースの配置等により形成された空洞1a内のPC部材1本体側に被定着材7を配置し、接合部コンクリート4側に突出区間31を定着する楔やナット等の定着具6を配置した状態で、空洞1a内に流動性を有するグリース等の充填材を充填し、定着具6周囲の空隙を埋めている。   In the example shown in FIG. 7, the fixing material 7 is arranged on the PC member 1 main body side in the cavity 1a formed by the arrangement of the case from the end face of the PC member 1 to the inside of the PC member 1, and on the joint concrete 4 side. In a state where the fixing tool 6 such as a wedge or a nut for fixing the protruding section 31 is arranged, the cavity 1a is filled with a filler such as grease having fluidity to fill the gap around the fixing tool 6.

ここでは被定着材7がPC部材1の上面等からPC部材1外へ抜け出せるよう、空洞1aからPC部材1の表面にまで連通する挿通孔1bを形成することにより空洞1a内とPC部材1の表面側の空間を連続させ、被定着材7の例えば上方側に一体化した棒材をPC部材1の表面に突出させている。被定着材7は接合部コンクリート4の打設前、または打設後にPC部材1から離脱させられ、空洞1aから不在になるため、空洞1a内には被定着材7の離脱後に定着具6が係止し、定着具6の移動を阻止する被係止材8が固定状態で配置されている。   Here, by forming an insertion hole 1b that communicates from the cavity 1a to the surface of the PC member 1 so that the fixing material 7 can come out from the upper surface of the PC member 1 and the like, the inside of the cavity 1a and the PC member 1 are formed. The space on the surface side is continuous, and a bar material integrated on, for example, the upper side of the material to be fixed 7 is protruded from the surface of the PC member 1. The fixing material 7 is detached from the PC member 1 before or after the joint concrete 4 is placed, and is removed from the cavity 1a. Therefore, the fixing tool 6 is placed in the cavity 1a after the fixing material 7 is detached. A locked material 8 that locks and prevents movement of the fixing tool 6 is arranged in a fixed state.

被定着材7は突出区間31に緊張力を導入した状態で、被定着材7に一体化した棒材がPC部材1上に設置されたジャッキ9に把持され、引き抜かれることによりPC部材1から離脱させられる。被定着材7の離脱に伴い、定着具6が被係止材8側へ移動するが、定着端部32は引張力伝達部材5の定着材53に係合していることで、定着具6に追従して移動することはないため、定着具6の移動距離分、突出区間31は伸長し、この伸長分の緊張力が定着端部32から引張力伝達部材5に伝達される。図8はPC部材1から被定着材7の離脱による突出区間31への緊張力の導入の様子を示している。この他、被定着材7は何らかの手段でPC部材1から離脱させらればよく、流動性のあるグリース、粒状体等の材料も使用可能である。   In a state where tension is introduced into the protruding section 31, the fixing material 7 is held by the jack 9 installed on the PC member 1 and pulled out from the PC member 1 by being pulled out by the jack 9 installed on the PC member 1. You can leave. As the fixing material 7 is detached, the fixing tool 6 moves toward the locked material 8, but the fixing end portion 32 is engaged with the fixing material 53 of the tensile force transmitting member 5. Therefore, the protruding section 31 is extended by the moving distance of the fixing tool 6, and the tension force of this extension is transmitted from the fixing end 32 to the tensile force transmitting member 5. FIG. 8 shows a state in which tension is introduced into the protruding section 31 by the separation of the fixing material 7 from the PC member 1. In addition, the fixing material 7 may be separated from the PC member 1 by some means, and fluid grease, granular materials, and the like can be used.

1……プレキャストコンクリート部材(PC部材)、1a……空洞、
2……支持部材、
3……緊張材、31……突出区間、32……定着端部、33……伝達材、34……シース、
4……接合部コンクリート、
5……引張力伝達部材、51……引張力伝達材、52……引張材、53……定着材、54……ナット、55……連結材、
6……定着具、7……被定着材、8……被係止材、
9……ジャッキ。
1 ... Precast concrete member (PC member), 1a ... Cavity,
2 …… Supporting member,
3 ... tension material, 31 ... projecting section, 32 ... fixing end, 33 ... transmission material, 34 ... sheath,
4 …… Concrete,
5 ... Tensile force transmitting member, 51 ... Tensile force transmitting material, 52 ... Tensile material, 53 ... Fixing material, 54 ... Nut, 55 ... Connecting material,
6 ... Fixing tool, 7 ... Fixing material, 8 ... Locked material,
9: Jack.

Claims (5)

内部に緊張材が配置され、この緊張材の軸方向の端部が端面から突出したプレキャストコンクリート部材を、このプレキャストコンクリート部材の軸方向両端部に位置する支持部材の天端上に設置し、前記プレキャストコンクリート部材の軸方向の端面から突出した前記緊張材の定着端部を前記支持部材上に現場で打設される接合部コンクリート中に埋設する方法であり、
前記緊張材の全長の内、少なくとも前記プレキャストコンクリート部材の端面から突出した突出区間の周面と前記接合部コンクリートとの付着が切れ、前記定着端部は前記緊張材の引張力を前記接合部コンクリートに伝達する機能を有しており、
前記支持部材の天端上に、前記緊張材に生じる引張力を前記接合部コンクリート内で負担する引張力伝達部材を載置する工程と、
前記プレキャストコンクリート部材の軸方向端部を前記支持部材の天端上に載置する工程とを含み、
前記定着端部と前記引張力伝達部材を前記緊張材の引張力の作用の向きに互いに係合させた状態で前記支持部材上に前記接合部コンクリートを打設し、前記定着端部を前記接合部コンクリート中に埋設し、前記プレキャストコンクリート部材を前記接合部コンクリートに接合することを特徴とするプレキャストコンクリート部材と接合部コンクリートとの接合方法。
A tension member is disposed inside, and a precast concrete member in which an end portion in the axial direction of the tension member protrudes from the end surface is installed on the top end of the support member positioned at both axial end portions of the precast concrete member, It is a method of burying in the joint concrete that is placed on the support member in the fixed portion of the tension material protruding from the end surface in the axial direction of the precast concrete member,
Of the total length of the tendon material, at least the peripheral surface of the projecting section projecting from the end surface of the precast concrete member is disconnected from the joint concrete, and the fixing end portion exerts the tensile force of the tendon material on the joint concrete. Has a function to communicate to
On the top end of the support member, placing a tensile force transmission member that bears the tensile force generated in the tension material in the joint concrete; and
Placing the axial end of the precast concrete member on the top end of the support member,
The joint concrete is placed on the support member in a state in which the fixing end and the tensile force transmitting member are engaged with each other in the direction of the tensile force of the tension material, and the fixing end is joined to the joint. A method of joining a precast concrete member and joint concrete, wherein the precast concrete member is embedded in joint concrete and the precast concrete member is joined to the joint concrete.
前記接合部コンクリートの打設前の時点で前記緊張材に緊張力を導入し、前記突出区間を前記プレキャストコンクリート部材の端面に定着させた状態で、前記定着端部と前記引張力伝達部材を係合させることを特徴とする請求項1に記載のプレキャストコンクリート部材と接合部コンクリートとの接合方法。   Tension force is introduced into the tendon material before placing the joint concrete, and the fixing end and the tensile force transmitting member are engaged with the protruding section fixed to the end surface of the precast concrete member. The joining method of the precast concrete member and joint concrete of Claim 1 characterized by the above-mentioned. 前記緊張材の前記プレキャストコンクリート部材の内部に位置する区間の周面と前記プレキャストコンクリート部材との付着が切れており、前記定着端部と前記引張力伝達部材を係合させた後、前記プレキャストコンクリート部材の端面に定着されている前記突出区間の定着を解除することを特徴とする請求項2に記載のプレキャストコンクリート部材と接合部コンクリートとの接合方法。   The precast concrete after the adhesion between the peripheral surface of the section of the tendon material located inside the precast concrete member and the precast concrete member is broken, and the fixing end and the tensile force transmitting member are engaged. The method for joining a precast concrete member and joint concrete according to claim 2, wherein the fixing of the protruding section fixed to the end face of the member is released. 前記接合部コンクリートの打設前に前記緊張材に緊張力を導入した状態で、前記定着端部と前記引張力伝達部材を係合させることを特徴とする請求項1に記載のプレキャストコンクリート部材と接合部コンクリートとの接合方法。   2. The precast concrete member according to claim 1, wherein the fixing end and the tensile force transmitting member are engaged with each other in a state in which a tension force is introduced into the tension member before the joint concrete is placed. Joining method with concrete. 請求項1乃至請求項4のいずれかに記載の接合方法に使用される前記引張力伝達部材であり、前記プレキャストコンクリート部材の軸方向を向く引張材とこの引張材の軸方向両側に、前記緊張材の前記定着端部が係合し得る定着材を有する、複数本の引張力伝達材を備え、前記支持部材の天端上で、少なくとも2本の前記引張伝達材が対になって1本の前記緊張材の前記突出区間の幅方向両側に配置され、2本の前記引張伝達材の両定着材に1本の前記緊張材の前記定着端部が係合することを特徴とする引張力伝達部材。   5. The tensile force transmission member used in the joining method according to claim 1, wherein the tension material facing the axial direction of the precast concrete member and the tension material on both sides in the axial direction of the tensile material. A plurality of tensile force transmitting materials having a fixing material with which the fixing end of the material can be engaged, and at least two of the tensile transmitting materials are paired on the top end of the supporting member; Tensile force characterized by being arranged on both sides in the width direction of the protruding section of the tension member, and the fixing end portions of the one tension member engaging with both fixing members of the two tension transmitting members. Transmission member.
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