JP2008069519A - Precast concrete member, and manufacturing method therefor - Google Patents

Precast concrete member, and manufacturing method therefor Download PDF

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JP2008069519A
JP2008069519A JP2006247254A JP2006247254A JP2008069519A JP 2008069519 A JP2008069519 A JP 2008069519A JP 2006247254 A JP2006247254 A JP 2006247254A JP 2006247254 A JP2006247254 A JP 2006247254A JP 2008069519 A JP2008069519 A JP 2008069519A
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insertion hole
precast concrete
reinforcing bar
concrete member
bar insertion
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Naoto Fujio
直人 藤生
Takesuke Kano
健佑 叶
Yasuhiko Masuda
安彦 増田
Kuniyoshi Sugimoto
訓祥 杉本
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Obayashi Corp
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Obayashi Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensively manufacturable PC member which is equipped with a hole allowing the insertion of a reinforcing bar etc., preventing the occurrence of a slip between concrete constituting the PC member, and internally injected grout. <P>SOLUTION: This precast concrete member is equipped with a reinforcing bar insertion hole 13. The reinforcing bar, a prestressing steel wire, etc. are inserted into the insertion hole 13; the grout is infilled into a gap between the insertion hole 13 and the reinforcing bar, the prestressing steel wire or the like; and the infilled ground is hardened to be integrated with a front reinforcing bar, the prestressing steel wire, etc. In the precast concrete member, a protrusion 21 is provided on the inner surface of the insertion hole 13. The protrusion 21 is formed in such a shape as to be gradually narrower toward the center of the insertion hole 13. Additionally, a spiral annealing wire 22 is embedded in the state of surrounding the insertion hole 13. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、プレキャストコンクリート部材及びこのプレキャストコンクリート部材の作成方法に関し、特に、鉄筋やＰＣ鋼線などが挿入され、鉄筋やＰＣ鋼線との隙間にグラウトを充填することにより、鉄筋やＰＣ鋼材が定着される鉄筋挿入孔を備えたプレキャストコンクリート部材及びその作成方法に関する。   The present invention relates to a precast concrete member and a method for producing the precast concrete member, and in particular, a rebar or PC steel wire is inserted, and a grout is filled in a gap between the rebar or PC steel wire so that the rebar or PC steel material is The present invention relates to a precast concrete member having a reinforcing bar insertion hole to be fixed and a method for producing the same.

従来より、施工期間短縮のため、プレキャストコンクリート（以下、ＰＣという）部材を用いてＲＣ柱梁構造を構築する工法が用いられている。このようなＰＣ部材を用いた工法として、例えば特許文献１には、ＰＣ柱部材と、ＰＣ梁部材と、ＰＣ仕口部材とを接合することにより柱梁構造を構築する方法が記載されている。この方法において、上方のＰＣ柱部材とＰＣ仕口部材と下方のＰＣ柱部材とを接合する場合には、下方のＰＣ柱部材の柱主筋の上端に継手を設け、ＰＣ仕口部材の柱主筋に相当する位置に鉄筋挿入孔を設けておき、下面より下方に向かって突出する上方のＰＣ柱部材の柱主筋を、その先端がＰＣ仕口部材の鉄筋挿入孔を貫通し、下方のＰＣ柱部材の継手内に到達するように挿入し、鉄筋挿入孔及び継手と柱主筋との隙間にグラウトを注入することにより、上方のＰＣ柱部材と、ＰＣ仕口部材と、下方のＰＣ柱部材とを一体化させる。
特開２００４―２７８２５７号公報 Conventionally, in order to shorten the construction period, a method of constructing an RC column beam structure using a precast concrete (hereinafter referred to as PC) member has been used. As a construction method using such a PC member, for example, Patent Document 1 describes a method of constructing a column beam structure by joining a PC column member, a PC beam member, and a PC joint member. . In this method, when the upper PC column member, the PC joint member, and the lower PC column member are joined, a joint is provided at the upper end of the column main bar of the lower PC column member, and the column main bar of the PC joint member is provided. Reinforcing bar insertion holes are provided at positions corresponding to the above, the main column bars of the upper PC column member projecting downward from the lower surface, the tip penetrates the reinforcing bar insertion hole of the PC joint member, and the lower PC column By inserting the grout into the gap between the reinforcing bar insertion hole and the joint and the column main reinforcement, the upper PC column member, the PC joint member, and the lower PC column member To integrate.
JP 2004-278257 A

上記の特許文献１には、ＰＣ部材に鉄筋挿入孔を設ける方法について詳細な記載がされていないが、一般的に、ＰＣ部材に鉄筋挿入孔を形成する場合には、シース管を埋設することにより形成する場合が多い。しかし、シース管は単価が高いため、ＰＣ部材を作成する際に多額のコストがかかる。また、シース管はコンクリート部材内に埋設されるため、コンクリート部材内に異物が残り、強度に影響を及ぼす虞がある。
また、コンクリートを打設する際に、鉄筋挿入孔に相当する位置に管状の部材を配置しておき、コンクリートの硬化後に管状の部材を取り除くことにより形成する方法も考えられるが、この方法では、コンクリートとグラウトとの間に充分な付着力がないため、滑りが生じてしまい強度が低下してしまう。 Although the above Patent Document 1 does not describe in detail a method for providing a reinforcing bar insertion hole in a PC member, generally, when forming a reinforcing bar insertion hole in a PC member, a sheath tube is embedded. It is often formed by. However, since the unit price of the sheath tube is high, a large amount of cost is required when creating the PC member. Further, since the sheath tube is embedded in the concrete member, foreign matter remains in the concrete member, which may affect the strength.
In addition, when placing concrete, a method of forming a tubular member at a position corresponding to the reinforcing bar insertion hole and removing the tubular member after hardening of the concrete is also conceivable. Since there is not enough adhesion between the concrete and the grout, slipping occurs and the strength decreases.

本発明は上記の問題に鑑みなされたものであり、その目的は、低コストで作成することができ、構成するコンクリートと内部に充填されたグラウトとの間ですべりの生じない鉄筋挿入孔を備えたＰＣ部材を提供することである。   The present invention has been made in view of the above problems, and has an object of providing a reinforcing bar insertion hole that can be produced at low cost and does not slip between the constituent concrete and the grout filled therein. PC member is provided.

本発明のＰＣ部材は、鉄筋、ＰＣ鋼線、又はＰＣ鋼材などの応力伝達部材が挿入され、挿入された応力伝達部材との隙間にグラウトが充填されることにより前記応力伝達部材が定着される挿入孔を有するプレキャストコンクリート部材であって、前記挿入孔の内面に凹凸部が形成されていることを特徴とする。
上記のＰＣ部材において、前記凹凸部を構成する凸部は前記挿入孔の中心側ほど幅が狭くなるような台形の断面形状を有してもよい。また、前記挿入孔は貫通していてもよく、前記挿入孔は、前記プレキャストコンクリート部材に埋設されたスリーブ継手に連通していてもよい。また、前記挿入孔の周囲を囲むように螺旋状に成形された番線又は細径の鋼材が埋設されていてもよい。 In the PC member of the present invention, a stress transmission member such as a reinforcing bar, PC steel wire, or PC steel is inserted, and the stress transmission member is fixed by filling a gap with the inserted stress transmission member. A precast concrete member having an insertion hole, wherein an uneven portion is formed on an inner surface of the insertion hole.
In the above-described PC member, the convex portion constituting the concave-convex portion may have a trapezoidal cross-sectional shape that becomes narrower toward the center of the insertion hole. Further, the insertion hole may penetrate, and the insertion hole may communicate with a sleeve joint embedded in the precast concrete member. Moreover, the wire formed in the spiral form so that the circumference | surroundings of the said insertion hole may be enclosed, or the steel material of a small diameter may be embed | buried.

本発明のＰＣ部材によれば、挿入孔の内面に凹凸部を設けることにより、コンクリートとグラウトの付着強度が向上される。また、挿入孔の周囲を囲むように螺旋状の番線又は細径の鋼材を埋設することにより、挿入孔の周囲のコンクリート部材を拘束し、さらに、コンクリートとグラウトの付着強度を向上することができる。   According to the PC member of the present invention, the adhesion strength between the concrete and the grout is improved by providing the uneven portion on the inner surface of the insertion hole. Moreover, by embedding a spiral wire or a thin steel material so as to surround the periphery of the insertion hole, the concrete member around the insertion hole can be restrained, and the adhesion strength between concrete and grout can be improved. .

また、本発明のＰＣ部材の作成方法は、上記のプレキャストコンクリート部材の作成方法であって、前記挿入孔に相当する位置に、可撓性部材がらせん状に巻きつけられた棒状部材を配置し、前記プレキャストコンクリート部材を構成するコンクリートを打設し、前記棒状部材を引抜き、前記可撓性部材を取り除くことにより前記挿入孔を形成することを特徴とする。   Further, the PC member producing method of the present invention is the above-mentioned precast concrete member producing method, wherein a rod-like member in which a flexible member is wound in a spiral shape is arranged at a position corresponding to the insertion hole. The insertion hole is formed by placing concrete constituting the precast concrete member, pulling out the bar-like member, and removing the flexible member.

また、本発明のＰＣ部材の作成方法は、上記のプレキャストコンクリート部材の作成方法であって、前記挿入孔に相当する位置に、複数の環状の可撓性部材が巻きつけられた棒状部材を配置し、前記プレキャストコンクリート部材を構成するコンクリートを打設し、前記棒状部材を引抜き、前記可撓性部材を取り除くことにより前記挿入孔を形成することを特徴とする。   Further, the PC member producing method of the present invention is the above-described precast concrete member producing method, wherein a rod-like member around which a plurality of annular flexible members are wound is disposed at a position corresponding to the insertion hole. The insertion hole is formed by placing concrete constituting the precast concrete member, pulling out the rod-like member, and removing the flexible member.

また、本発明のＰＣ部材の作成方法は、上記のプレキャストコンクリート部材の作成方法であって、前記挿入孔に相当する位置に表面に螺条の設けられた螺条部材を配置し、前記プレキャストコンクリート部材を構成するコンクリートを打設し、前記螺条部材を回転させながら引抜くことにより前記挿入孔を形成することを特徴とする。   Further, the PC member producing method of the present invention is the above-described precast concrete member producing method, wherein a screw member having a surface provided with a screw is disposed at a position corresponding to the insertion hole, and the precast concrete is provided. The insertion hole is formed by placing concrete constituting the member and pulling it out while rotating the screw member.

本発明のＰＣ部材の作成方法によれば、高価なシース管を用いず、再利用可能な可撓性部材及び棒状部材を用いてに鉄筋挿入孔を形成するため、ＰＣ部材の作成コストを削減することができる。   According to the method for producing a PC member of the present invention, the rebar insertion hole is formed using a reusable flexible member and a rod-like member without using an expensive sheath tube, thereby reducing the production cost of the PC member. can do.

本発明によれば、高価なシース管を用いず、再利用可能な可撓性部材及び棒状部材を用いて鉄筋挿入孔を形成するため、ＰＣ部材の作成コストを削減することができる。また、鉄筋挿入孔の内面に凸部を設けることにより、ＰＣ部材を構成するコンクリートと鉄筋挿入孔内に充填されたグラウトの付着強度を向上することができ、大きな応力が作用するような部位にも、ＰＣ部材を用いた施工を行うことができる。   According to the present invention, the rebar insertion hole is formed by using a reusable flexible member and a rod-like member without using an expensive sheath tube, and thus the production cost of the PC member can be reduced. In addition, by providing a convex portion on the inner surface of the reinforcing bar insertion hole, the adhesion strength between the concrete constituting the PC member and the grout filled in the reinforcing bar insertion hole can be improved, and a part where a large stress acts is applied. Also, construction using a PC member can be performed.

以下、本発明のＰＣ部材及びその作成方法の一実施形態について図面を参照しながら詳細に説明する。以下の説明では、図１に示すような、上方のＰＣ柱部材１０とＰＣ仕口部材１２と下方のＰＣ柱部材１４とを接合する場合を例として説明する。なお、ＰＣ仕口部材１２が本発明のＰＣ部材に該当する。
図１に示すように、上方のＰＣ柱部材１０は、下端より突出するように設けられた柱主筋１１を備える。ＰＣ仕口部材１２を構成するコンクリート１７には、柱主筋に相当する位置に鉄筋挿入孔１３が設けられている。また、下方のＰＣ柱部材１４は、柱主筋１５と、柱主筋１５の先端に接続され、鉄筋挿入口が上面に開口するように設けられたスリーブ継手１６とを備える。 Hereinafter, an embodiment of a PC member and a method for producing the same according to the present invention will be described in detail with reference to the drawings. In the following description, a case where the upper PC column member 10, the PC joint member 12, and the lower PC column member 14 are joined as shown in FIG. 1 will be described as an example. The PC joint member 12 corresponds to the PC member of the present invention.
As shown in FIG. 1, the upper PC column member 10 includes a column main reinforcement 11 provided so as to protrude from the lower end. The concrete 17 constituting the PC joint member 12 is provided with a reinforcing bar insertion hole 13 at a position corresponding to the column main reinforcement. The lower PC column member 14 includes a column main reinforcement 15 and a sleeve joint 16 that is connected to the tip of the column main reinforcement 15 and is provided so that a reinforcing bar insertion opening opens on the upper surface.

これらのＰＣ部材を接合する場合には、下方のＰＣ柱部材１４の上方にＰＣ仕口部材１２を建込み、上方のＰＣ柱部材１０を、柱主筋１１がＰＣ仕口部材１２の鉄筋挿入孔１３を貫通して、その先端がスリーブ継手１６内に挿入されるように建込んだ後、スリーブ継手１６及び鉄筋挿入孔１３と柱主筋１１との間にグラウトを充填する。この充填したグラウトが硬化することにより、上方のＰＣ柱部材１０、ＰＣ仕口部材１２、及び下方のＰＣ柱部材１４が一体に接続される。   When these PC members are joined, the PC joint member 12 is installed above the lower PC column member 14, and the upper PC column member 10 is connected to the reinforcing bar insertion hole of the PC joint member 12. 13, and the tip is inserted so as to be inserted into the sleeve joint 16, and then the grout is filled between the sleeve joint 16 and the reinforcing bar insertion hole 13 and the column main reinforcement 11. As the filled grout is cured, the upper PC column member 10, the PC joint member 12, and the lower PC column member 14 are integrally connected.

図２（Ａ）は、ＰＣ仕口部材１２の鉄筋挿入孔１３の近傍の断面図であり、同図（Ｂ）は、鉄筋挿入孔１３の拡大図である。同図（Ａ）に示すように、ＰＣ仕口部材１２は、鉄筋挿入孔１３の外周を囲むようにコンクリート１７に埋設された螺旋状の番線２２を備える。鉄筋挿入孔１３の内面には凹凸が形成されており、凹凸を構成する凸部２１は、鉄筋挿入孔１３の中心を軸とした螺旋状に形成されており、この凸部の間に凹部２３が形成されている。また、同図（Ｂ）に示すように、凸部２１は鉄筋挿入孔１３の中心側ほど幅が狭くなるような台形断面形状に形成されている。   FIG. 2A is a cross-sectional view of the PC joint member 12 in the vicinity of the reinforcing bar insertion hole 13, and FIG. 2B is an enlarged view of the reinforcing bar insertion hole 13. As shown in FIG. 2A, the PC joint member 12 includes a spiral wire 22 embedded in the concrete 17 so as to surround the outer periphery of the reinforcing bar insertion hole 13. Concavities and convexities are formed on the inner surface of the reinforcing bar insertion hole 13, and the convex portion 21 constituting the concave and convex portions is formed in a spiral shape with the center of the reinforcing bar insertion hole 13 as an axis, and a concave portion 23 is formed between the convex portions. Is formed. Further, as shown in FIG. 4B, the convex portion 21 is formed in a trapezoidal cross-sectional shape such that the width becomes narrower toward the center side of the reinforcing bar insertion hole 13.

以下、このような鉄筋挿入孔１３を備えたＰＣ仕口部材１２の作成方法について説明する。
まず、図３に示すように、凹部２３に対応する台形断面形状を有する細長いゴム材３１をホース部材３０の表面に螺旋状に巻きつける。この際、ゴム材３１の幅の広い側の面がホース部材３０の表面に当接するようにし、ゴム材３１とホース部材３０との間には隙間が生じないように密着させる。このようなホース部材３０としては、後述するコンクリートの打設時のコンクリートの圧力により変形が生じないものを用いる。また、ゴム材３１及びホース部材３０には、コンクリート硬化時の発熱やコンクリートのアルカリ性などにより劣化しないような材料を用いる。 Hereinafter, a method of creating the PC joint member 12 having such a reinforcing bar insertion hole 13 will be described.
First, as shown in FIG. 3, an elongated rubber material 31 having a trapezoidal cross-sectional shape corresponding to the recess 23 is spirally wound around the surface of the hose member 30. At this time, the surface of the rubber material 31 on the wide side is brought into contact with the surface of the hose member 30, and the rubber material 31 and the hose member 30 are in close contact with each other so that no gap is generated. As such a hose member 30, a member that is not deformed by the pressure of concrete at the time of placing concrete to be described later is used. Further, the rubber material 31 and the hose member 30 are made of materials that do not deteriorate due to heat generated when the concrete is hardened or alkalinity of the concrete.

次に、ゴム材３１を巻きつけたホース部材３０を型枠内の鉄筋挿入孔１３に相当する位置に配置する。この際、ホース部材３０の少なくとも一端がＰＣ仕口部材１２の表面に当たる位置まで到達するように配置する。ホース部材３０を配置する際には、コンクリート打設時にコンクリートの圧力により移動しないように、既に配筋されている柱主筋などの部材に結束線などを用いて固定しておく。
次に、ホース部材３０を囲むように、螺旋状に形成した番線２２を配置する。なお、この工程は、ホース部材３０を配置する工程の前に行ってもよい。
次に、ＰＣ仕口部材１２の外周に当たる位置に型枠を設置し、型枠内にコンクリートを打設する。コンクリートがホース部材３０とゴム材３１により形成された凹凸に入りこむことにより鉄筋挿入孔１３の内面の凸部２１を形成することができる。 Next, the hose member 30 around which the rubber material 31 is wound is disposed at a position corresponding to the reinforcing bar insertion hole 13 in the mold. At this time, the hose member 30 is arranged so that at least one end of the hose member 30 reaches a position where it contacts the surface of the PC connection member 12. When the hose member 30 is arranged, the hose member 30 is fixed to a member such as a column main reinforcement already arranged using a binding wire so that the hose member 30 is not moved by the pressure of the concrete when the concrete is placed.
Next, the number wire 22 formed in a spiral shape is disposed so as to surround the hose member 30. In addition, you may perform this process before the process of arrange | positioning the hose member 30. FIG.
Next, a mold is installed at a position corresponding to the outer periphery of the PC joint member 12, and concrete is placed in the mold. The convex portion 21 on the inner surface of the reinforcing bar insertion hole 13 can be formed by the concrete entering the irregularities formed by the hose member 30 and the rubber material 31.

打設したコンクリートが硬化したのち、あるいはコンクリートが完全に硬化する前に、ＰＣ仕口部材１２の表面よりホース部材３０を引抜く。ホース部材３０を引抜いた後、鉄筋挿入孔１３の部材表面に開口している側よりゴム材３１を引抜く。この際、上記のようにゴム材３１にコンクリート硬化時の発熱やコンクリートのアルカリなどにより劣化しないような材質のゴムを用いることで、ゴム材３１の一端を引張ることにより、ゴム材３１が破断することなく、簡単な作業でゴム材３１の全体を引抜くことができる。また、ホース部材３０及びゴム材３１は損傷することがないため、取り外したホース部材３０及びゴム材３１を再利用することができる。
以上のようにして内面に螺旋状の凸部２１の形成された鉄筋挿入孔１３を備えたＰＣ仕口部材１２を作成することができる。 After the cast concrete is cured or before the concrete is completely cured, the hose member 30 is pulled out from the surface of the PC joint member 12. After the hose member 30 is pulled out, the rubber material 31 is pulled out from the side opened on the member surface of the reinforcing bar insertion hole 13. At this time, as described above, the rubber material 31 is broken by pulling one end of the rubber material 31 by using the rubber material 31 that does not deteriorate due to heat generated during concrete curing or alkali of the concrete. The entire rubber material 31 can be pulled out with a simple operation. Further, since the hose member 30 and the rubber material 31 are not damaged, the removed hose member 30 and the rubber material 31 can be reused.
As described above, the PC joint member 12 including the reinforcing bar insertion hole 13 in which the spiral convex portion 21 is formed on the inner surface can be produced.

このようにして形成されたＰＣ仕口部材１２によれば、その鉄筋挿入孔１３の内面に凹凸が形成されることにより、鉄筋挿入孔１３に充填されたグラウトとＰＣ仕口部材１２を構成するコンクリートとの付着強度を向上することができる。特に、本実施形態では、凹凸を構成する凸部２１を、その断面が台形となるように形成しているので、付着強度が効果的に向上する。以下、このように付着強度を効果的に向上することができる原理を説明する。   According to the PC joint member 12 formed in this manner, the grout filled in the reinforcing bar insertion hole 13 and the PC joint member 12 are formed by forming irregularities on the inner surface of the reinforcing bar insertion hole 13. The adhesion strength with concrete can be improved. In particular, in this embodiment, since the convex part 21 which comprises an unevenness | corrugation is formed so that the cross section may become trapezoid, adhesion strength improves effectively. Hereinafter, the principle that the adhesion strength can be effectively improved will be described.

図４は、充填されたグラウトにせん断力の作用したＰＣ部材の鉄筋挿入孔の近傍の拡大図であり、（Ａ）は鉄筋挿入孔に長方形断面形状の凸部１２１が設けられた場合を、（Ｂ）は本実施形態の台形断面形状の凸部２１が設けられた場合を示す。同図（Ａ）に示すように、鉄筋挿入孔内に長方形断面形状の凸部１２１を有するＰＣ部材のコンクリート１４０と鉄筋挿入孔内に充填されたグラウト１４１との間にせん断力が作用した場合には、せん断力に垂直方向のコンクリート１４０の凸部１２１と、グラウトの凸部１４２との接合面に応力が発生する。このため、同図（Ａ）に破線で示すように、グラウト１４１の凸部１４２の付け根（図中の波線）にせん断応力が作用し、破損してしまう。   FIG. 4 is an enlarged view of the vicinity of the reinforcing bar insertion hole of the PC member in which a shearing force is applied to the filled grout, and (A) shows a case where a convex portion 121 having a rectangular cross section is provided in the reinforcing bar insertion hole. (B) shows the case where the convex part 21 of trapezoidal cross-sectional shape of this embodiment is provided. As shown in FIG. 6A, when a shearing force acts between the concrete 140 of the PC member having the convex portion 121 having a rectangular cross section in the reinforcing bar insertion hole and the grout 141 filled in the reinforcing bar insertion hole. In this case, stress is generated on the joint surface between the convex portion 121 of the concrete 140 and the convex portion 142 of the grout in a direction perpendicular to the shearing force. For this reason, as shown by a broken line in FIG. 6A, a shear stress acts on the root (the wavy line in the figure) of the convex portion 142 of the grout 141, resulting in damage.

これに対し、同図（Ｂ）に示すように、鉄筋挿入孔内の凸部２１が台形断面形状に形成されている場合には、グラウト４１にせん断力が作用すると、グラウト４１の凸部４２の傾斜部とコンクリート４０の凸部２１の傾斜部との間に支圧力が発生する。グラウト４１及びコンクリート４０は、この支圧力によりせん断力に抵抗しており、グラウト４１の凸部４２には過度の応力が作用せず、グラウト４１が破損するのを防止できる。さらに、本実施形態のＰＣ部材では、鉄筋挿入孔１３の周囲を囲むように螺旋状の番線２２を配置しており、この番線２２がグラウト４１及びコンクリート４０を拘束することによりコンクリートに作用する支圧力に対して抵抗する。このため、本実施形態のＰＣ部材は、グラウト４１とコンクリート４０との間でより大きなせん断力が作用した場合にも、これに抵抗することができる。   On the other hand, as shown in FIG. 5B, when the convex portion 21 in the reinforcing bar insertion hole is formed in a trapezoidal cross-sectional shape, when a shearing force acts on the grout 41, the convex portion 42 of the grout 41 is obtained. A supporting pressure is generated between the inclined portion of the protrusion and the inclined portion of the convex portion 21 of the concrete 40. The grout 41 and the concrete 40 resist the shearing force by this support pressure, and an excessive stress does not act on the convex portion 42 of the grout 41, and the grout 41 can be prevented from being damaged. Furthermore, in the PC member of this embodiment, the spiral wire 22 is arranged so as to surround the periphery of the reinforcing bar insertion hole 13, and the wire 22 supports the grout 41 and the concrete 40 to restrain the concrete. Resist to pressure. For this reason, the PC member of this embodiment can resist this even when a larger shearing force acts between the grout 41 and the concrete 40.

ここで、発明者らは、上記のように鉄筋挿入孔の内面に凸部を設けることにより、コンクリートとグラウトの付着強度が向上されることを実験により確かめたので、この実験について以下説明する。
本実験では、試供体として鉄筋挿入孔を有するコンクリート部材を作成し、鉄筋を試供体の鉄筋挿入孔に挿入し、鉄筋と鉄筋挿入孔との間の隙間にグラウトを充填し、グラウトが硬化した後、鉄筋に引張力を加えて最大耐力を調べた。
試供体としては、シース管を埋設し、鉄筋挿入孔を形成したコンクリート部材（リブが少ない場合と多い場合の２種類）、シース管を用いずに円筒状の鉄筋挿入孔を形成した（すなわち、鉄筋挿入孔に凸部が設けられていない）コンクリート部材（異なるグラウトを用いた３種類）、鉄筋挿入孔の内面に複数の凸部が設けられたコンクリート部材（凸部の間隔が異なる３種類）を用いた。 Here, since the inventors have confirmed through experiments that the adhesion strength between the concrete and the grout is improved by providing the protrusions on the inner surface of the reinforcing bar insertion hole as described above, this experiment will be described below.
In this experiment, a concrete member having a reinforcing bar insertion hole was created as a specimen, the reinforcing bar was inserted into the reinforcing bar insertion hole of the specimen, the grout was filled in the gap between the reinforcing bar and the reinforcing bar insertion hole, and the grout was hardened. Later, tensile strength was applied to the reinforcing bars to examine the maximum yield strength.
As a sample, a concrete member (two types of cases with few and many ribs) in which a sheath tube was embedded and a reinforcing bar insertion hole was formed, and a cylindrical reinforcing bar insertion hole was formed without using a sheath pipe (that is, Reinforcing bar insertion hole is not provided with a concrete member (three types using different grout), Reinforcing bar insertion hole is provided with a plurality of protruding parts on the inner surface (three types with different intervals between the protruding parts) Was used.

図５は、鉄筋挿入孔の周面積あたりの最大引張力（すなわち単位面積あたりの付着強度）を示すグラフである。同図に示すように、鉄筋挿入孔の内面に凸部を設けていない場合には、付着強度は１０［Ｎ／ｍｍ２］以下である。また、シース管により鉄筋挿入孔を形成した場合の付着強度は、リブが少ない場合では１０［Ｎ／ｍｍ２］程度、リブが多い場合では２５〜３０［Ｎ／ｍｍ２］程度である。
これに対して、鉄筋挿入孔の内面に凸部を設けた場合には、凸部の間隔が５０ｍｍである条件では若干低い値となっているものの、概ね２０〜２５［Ｎ／ｍｍ２］程度の付着強度が得られた。 FIG. 5 is a graph showing the maximum tensile force per circumferential area of the reinforcing bar insertion hole (that is, the adhesion strength per unit area). As shown in the figure, when no protrusion is provided on the inner surface of the reinforcing bar insertion hole, the adhesion strength is 10 [N / mm 2 ] or less. The adhesion strength when the reinforcing bar insertion hole is formed by the sheath tube is about 10 [N / mm 2 ] when the number of ribs is small, and about 25 to 30 [N / mm 2 ] when the number of ribs is large.
On the other hand, when the convex portion is provided on the inner surface of the reinforcing bar insertion hole, the value is approximately 20 to 25 [N / mm 2 ] although the value is slightly lower under the condition that the interval between the convex portions is 50 mm. The adhesion strength was obtained.

さらに、鉄筋挿入孔の周囲を囲むように螺旋状に形成した番線を埋設することにより付着強度が向上することを確かめるため、螺旋状に形成した番線を埋設した試供体と、番線を埋設していない試供体について、荷重と変位の関係を調べた。図６は、番線を埋設した試供体及び番線を埋設していない試供体の荷重―変形の関係を示すグラフである。同図に示すように、番線を埋設した試供体は、番線を埋設していない試供体に比べて、より大きな最大耐力を有することがわかる。このことから、ＰＣ部材に鉄筋挿入孔の周囲を囲むように螺旋状に形成した番線を埋設することにより、コンクリートとグラウトとの付着強度を向上できることが確認された。   Furthermore, in order to confirm that the adhesion strength is improved by embedding a spiral wire formed so as to surround the reinforcing bar insertion hole, a test sample embedded with the spiral wire and a wire are embedded. The relationship between load and displacement was investigated for the specimens that were not. FIG. 6 is a graph showing the load-deformation relationship of a specimen with an embedded wire and a specimen without an embedded wire. As shown in the figure, it can be seen that the specimen in which the wire is embedded has a greater maximum proof stress than the sample in which the wire is not embedded. From this, it was confirmed that the adhesion strength between the concrete and the grout can be improved by embedding a spiral wire in the PC member so as to surround the periphery of the reinforcing bar insertion hole.

本実施形態によれば、以下の効果が得られる。
従来は、単価が高く、コンクリート部材に埋め込まれるため、再利用することのできないシース管を用いて、ＰＣ部材に鉄筋挿入孔を形成しており、ＰＣ部材の作成にコストがかかっていたが、本実施形態では、シース管を用いず、再利用可能なホース部材及びゴム材により鉄筋挿入孔を作成するため、コストを削減することができる。 According to the present embodiment, the following effects can be obtained.
Conventionally, since the unit price is high and it is embedded in a concrete member, a rebar insertion hole is formed in the PC member using a sheath tube that cannot be reused, and it took cost to create the PC member. In this embodiment, since the reinforcing bar insertion hole is created by a reusable hose member and rubber material without using a sheath tube, the cost can be reduced.

また、ＰＣ部材内に異物が残存しないため、設計通りの強度の発現が期待できる。
また、鉄筋挿入孔内の凸部を台形断面形状とし、鉄筋挿入孔の周囲を螺旋状の番線で拘束することにより、グラウトとコンクリートとの間の付着強度を向上することができる。 In addition, since no foreign matter remains in the PC member, it is possible to expect the development of strength as designed.
Moreover, the adhesive strength between grout and concrete can be improved by making the convex part in a reinforcing bar insertion hole into trapezoidal cross-sectional shape, and restraining the circumference | surroundings of a reinforcing bar insertion hole with a spiral wire.

なお、本実施形態では、鉄筋挿入孔の内面に形成された凸部を台形断面形状としたが、これに限らす、凸部を長方形断面形状や、三角形断面形状などとしてもよい。
なお、本発明のＰＣ部材は、図７（Ａ）に示すように、端面より梁主筋５２が突出した一対のＰＣ梁部材５０と、梁主筋に相当する位置に鉄筋挿入孔５３を備えたＰＣ仕口部材５１とを接続する場合におけるＰＣ仕口部材５１にも適用できる。図７（Ａ）に示す場合には、ＰＣ仕口部材５１の鉄筋挿入孔５３の内面に凸部を設けることにより、スリーブ継手と同様に梁主筋同士の間で応力を伝達することができる。このように本発明は、鉄筋を挿入し、グラウトを充填することにより、ＰＣ部材と鉄筋とを一体化させるための鉄筋挿入孔を備えたＰＣ部材に対して適用することができる。 In this embodiment, the convex portion formed on the inner surface of the reinforcing bar insertion hole has a trapezoidal cross-sectional shape. However, the convex portion may be a rectangular cross-sectional shape or a triangular cross-sectional shape.
As shown in FIG. 7A, the PC member of the present invention includes a pair of PC beam members 50 in which the beam main bar 52 protrudes from the end surface, and a PC including a reinforcing bar insertion hole 53 at a position corresponding to the beam main bar. The present invention can also be applied to the PC joint member 51 when the joint member 51 is connected. In the case shown in FIG. 7A, by providing a convex portion on the inner surface of the reinforcing bar insertion hole 53 of the PC joint member 51, stress can be transmitted between the beam main bars similarly to the sleeve joint. Thus, this invention is applicable with respect to PC member provided with the reinforcing bar insertion hole for integrating a PC member and a reinforcing bar by inserting a reinforcing bar and filling grout.

さらに、本実施形態のＰＣ部材は、鉄筋を挿入するための鉄筋挿入孔のみではなく、ＰＣ鋼線やＰＣ鋼材などを挿入するような場合にも用いることができ、要するに、コンクリート部材に鉄筋挿入孔を設け、鉄筋、ＰＣ鋼線、ＰＣ鋼材などの応力伝達部材を挿入し、応力伝達部材と鉄筋挿入孔との隙間にグラウトを充填することにより一体化させるような場合に用いることができる。   Furthermore, the PC member of the present embodiment can be used not only for inserting a reinforcing bar insertion hole for inserting a reinforcing bar, but also when inserting a PC steel wire or a PC steel material. In short, the reinforcing bar is inserted into a concrete member. It can be used in the case where a hole is provided, a stress transmission member such as a reinforcing bar, PC steel wire, PC steel or the like is inserted, and the gap between the stress transmission member and the reinforcing bar insertion hole is filled with grout.

また、本発明のＰＣ部材は、鉄筋等を挿入する孔が貫通孔である場合に限らず、図７（Ｂ）に示すように、鉄筋６４と、鉄筋６４の先端に接続されたスリーブ継手６３とを備えるＰＣ部材６２において、スリーブ継手６３の鉄筋挿入口と部材表面との間を結ぶ鉄筋挿入孔６５が設けられる場合にも適用できる。この場合、部材端面より突出した鉄筋６１を備えるＰＣ部材６０の鉄筋６１を鉄筋挿入孔６５からスリーブ継手６３へ挿入し、スリーブ継手６３及び鉄筋挿入孔６５にグラウトを充填する。鉄筋挿入孔６５の内面に凹凸が設けられていないと、スリーブ継手のみで鉄筋６１に作用する応力を伝達しなければならないが、図７（Ｂ）の場合には、鉄筋挿入孔６５の内面に凹凸を設けることにより、鉄筋挿入孔６５内でも鉄筋６１に作用する応力の伝達が行われるため、より大きな応力を伝達することができる。   Further, the PC member of the present invention is not limited to the case where the hole for inserting the reinforcing bar or the like is a through hole, but as shown in FIG. 7B, the reinforcing bar 64 and the sleeve joint 63 connected to the tip of the reinforcing bar 64. In the PC member 62 including the above, the present invention can also be applied to a case where a reinforcing bar insertion hole 65 that connects the reinforcing bar insertion port of the sleeve joint 63 and the member surface is provided. In this case, the reinforcing bar 61 of the PC member 60 including the reinforcing bar 61 protruding from the end surface of the member is inserted into the sleeve joint 63 from the reinforcing bar insertion hole 65, and the sleeve joint 63 and the reinforcing bar insertion hole 65 are filled with grout. If the inner surface of the reinforcing bar insertion hole 65 is not provided with irregularities, the stress acting on the reinforcing bar 61 must be transmitted only by the sleeve joint, but in the case of FIG. By providing the unevenness, the stress acting on the reinforcing bar 61 is transmitted even in the reinforcing bar insertion hole 65, so that a larger stress can be transmitted.

このように、従来は、継手からＰＣ部材表面までの鉄筋挿入孔の内面には凹凸が設けられておらず、付着力を期待することができなかった。これに対し、上述のように、鉄筋挿入孔の内面に凹凸を設けることにより、鉄筋挿入孔の部分にも付着力を期待することができる。このように本発明によれば、従来は付着力を期待していなかった部分においても、付着力を発生させることができるため、作用する応力が大きくＰＣ部材を用いた施工を行うことができなかったような部位にも、ＰＣ部材を適用することが可能となる   Thus, conventionally, the inner surface of the reinforcing bar insertion hole from the joint to the surface of the PC member has not been provided with irregularities, and it has not been possible to expect adhesive force. On the other hand, as described above, by providing irregularities on the inner surface of the reinforcing bar insertion hole, it is possible to expect adhesive force at the reinforcing bar insertion hole. As described above, according to the present invention, since the adhesive force can be generated even in the portion where the adhesive force is not expected conventionally, the applied stress is large and the construction using the PC member cannot be performed. It is possible to apply PC members to such parts

また、鉄筋挿入孔を備えたＰＣ部材の作成方法は上述の方法に限られない。例えば、図８に示すような表面に螺条７１を有する螺条部材７０を用いて、鉄筋挿入孔を備えたＰＣ部材を作成することもできる。螺条部材７０を用いた方法では、上記の方法におけるホース部材３０及びゴム材３１と同様に、螺条部材７０はコンクリート硬化時の発熱やコンクリートのアルカリなどにより劣化しないような材料を用いるとよい。なお、この螺条部材７０は、軸方向に向かって一方の端部から他方の端部に向かって径が徐々に大きくなるように形成されており、また、螺条部材７０の表面に設けられた螺条７１の断面形状は外周に向かって幅の狭くなるような台形形状に形成されている。   Moreover, the creation method of PC member provided with the reinforcing bar insertion hole is not restricted to the above-mentioned method. For example, a PC member provided with a reinforcing bar insertion hole can also be created using a thread member 70 having a thread 71 on the surface as shown in FIG. In the method using the screw member 70, like the hose member 30 and the rubber material 31 in the above method, the screw member 70 may be made of a material that does not deteriorate due to heat generated during concrete hardening or alkali of the concrete. . The screw member 70 is formed so that its diameter gradually increases from one end to the other end in the axial direction, and is provided on the surface of the screw member 70. The cross-sectional shape of the screw 71 is formed in a trapezoidal shape that becomes narrower toward the outer periphery.

このような螺条部材７０を用いた場合には、上述したＰＣ部材の作成方法におけるホース部材３０及びゴム材３１に代えて、螺条部材７０を鉄筋挿入孔に相当する位置に配置する。そして、ＰＣ部材を構成するコンクリートを打設し、打設したコンクリートが硬化したのち、ＰＣ部材の表面に開口している側より螺条部材７０を回転させながら引き抜く。この際、螺条部材７０は、表面からＰＣ部材内部に向かって径が小さくなるように配置されているため、螺条部材７０を回転させることにより、容易に引き抜くことができる。これにより、ＰＣ部材に内面に凹凸を有する鉄筋挿入孔を設けることができる。   When such a screw member 70 is used, the screw member 70 is disposed at a position corresponding to the reinforcing bar insertion hole instead of the hose member 30 and the rubber material 31 in the above-described PC member creation method. Then, the concrete constituting the PC member is placed, and after the placed concrete is cured, the screw member 70 is pulled out from the side opened on the surface of the PC member while being rotated. At this time, since the screw member 70 is arranged so that the diameter decreases from the surface toward the inside of the PC member, the screw member 70 can be easily pulled out by rotating the screw member 70. Thereby, the reinforcing bar insertion hole which has an unevenness | corrugation on the inner surface can be provided in PC member.

なお、上記の実施形態では、凸部を螺旋状に形成するものとしたが、これに限らず、一定の間隔で複数の環状に形成された凸部を設ける構成としてもよい。このような場合には、上述のホース部材に巻きつけるゴム材として例えば図９に示すような、一部の切断された複数の環状部８２と、これらの環状部８２を連結する連結部８１とで構成されるゴム材８０を用いればよい。このゴム材８０をホース部材の周囲に取付け、鉄筋挿入孔に相当する位置に配置し、コンクリートを打設し、コンクリートの硬化後に、ホース部材及びゴム材８０を取り除くことで内面に凸部を有する鉄筋挿入孔を備えたＰＣ部材を作成することができる。   In the above embodiment, the convex portions are formed in a spiral shape. However, the present invention is not limited to this, and a plurality of annular convex portions may be provided at regular intervals. In such a case, as a rubber material wound around the above-described hose member, for example, as shown in FIG. 9, a plurality of partially cut annular portions 82, and a connecting portion 81 that connects these annular portions 82, The rubber material 80 constituted by the above may be used. This rubber material 80 is attached to the periphery of the hose member, arranged at a position corresponding to the reinforcing bar insertion hole, concrete is placed, and after the concrete is hardened, the hose member and the rubber material 80 are removed to have a convex portion on the inner surface. A PC member having a reinforcing bar insertion hole can be created.

上方のＰＣ柱部材とＰＣ仕口部材と下方のＰＣ柱部材とを接合する方法を説明するための図である。It is a figure for demonstrating the method to join an upper PC pillar member, a PC joint member, and a lower PC pillar member. （Ａ）は、ＰＣ仕口部材の鉄筋挿入孔の近傍の断面図であり、同図（Ｂ）は、鉄筋挿入孔１３の拡大図である。(A) is sectional drawing of the vicinity of the reinforcing bar insertion hole of PC joint member, The figure (B) is an enlarged view of the reinforcing bar insertion hole 13. FIG. 円柱状を有するホース部材の表面に、台形断面形状の細長いゴム材を幅の広い側の面がホース部材に密着するように螺旋状に巻き付けた様子を示す図である。It is a figure which shows a mode that the surface of the hose member which has a column shape was wound spirally so that the surface of a wide side might closely_contact | adhere to the hose member. ＰＣ仕口部材の鉄筋挿入孔の近傍の拡大図であり、（Ａ）は凸部を長方形断面形状に形成した場合を、（Ｂ）は本実施形態の凸部を台形形状に形成した場合を示す。It is an enlarged view of the vicinity of the reinforcing bar insertion hole of the PC joint member, (A) shows the case where the convex part is formed in a rectangular cross-sectional shape, (B) shows the case where the convex part of this embodiment is formed in a trapezoidal shape. Show. 鉄筋挿入孔の周面積あたりの最大引張力を示すグラフである。It is a graph which shows the maximum tensile force per circumference area of a reinforcing bar insertion hole. 番線を埋設した試供体及び番線を埋設していない試供体の荷重―変形の関係を示すグラフである。It is a graph which shows the load-deformation relationship of the test body which embed | buried the number wire, and the sample body which has not embed | buried the number wire. 本発明のＰＣ部材を提供することのできる場合を説明するための図であり、（Ａ）は、端面より梁主筋が突出した一対のＰＣ梁部材と、梁主筋に相当する位置に鉄筋挿入孔を備えたＰＣ仕口部材とを接続する場合、（Ｂ）は、端面より突出した鉄筋を備えるＰＣ部材と、鉄筋と、鉄筋の先端に接続されたスリーブ継手と、スリーブ継手の鉄筋挿入口と部材表面との間を結ぶ鉄筋挿入孔を備えるＰＣ部材とを接続する場合を示す。It is a figure for demonstrating the case where the PC member of this invention can be provided, (A) is a pair of PC beam members from which the beam principal reinforcement protruded from the end surface, and a reinforcing bar insertion hole at a position corresponding to the beam principal reinforcement (B) includes a PC member including a reinforcing bar protruding from the end surface, a reinforcing bar, a sleeve joint connected to the tip of the reinforcing bar, and a reinforcing bar insertion port of the sleeve joint. The case where it connects with the PC member provided with the reinforcing bar insertion hole which connects between the member surfaces is shown. 鉄筋挿入孔を有するＰＣ部材を作成する別の方法に用いられる螺条部材を示す図である。It is a figure which shows the thread member used for another method of creating the PC member which has a reinforcing bar insertion hole. 一定の間隔で複数の環状の凸部を設ける場合に、ホース部材の周囲に取付けられるゴム材を示す図である。It is a figure which shows the rubber material attached to the circumference | surroundings of a hose member, when providing a some cyclic | annular convex part with a fixed space | interval.

符号の説明Explanation of symbols

１０ 上方のＰＣ柱部材 １１ 柱主筋
１２ ＰＣ仕口部材 １３ 鉄筋挿入孔
１４ 下方のＰＣ柱部材 １５ 柱主筋
１６ スリーブ継手 １７ コンクリート
２１、１２１ 凸部 ２２ 番線
３０ ホース部材 ３１ ゴム材
４０、１４０ コンクリート部材 ４１，１４１ グラウト
５０ ＰＣ梁部材 ５１ ＰＣ仕口部材
５２ 梁主筋 ５３ 鉄筋挿入孔
６０、６２ ＰＣ部材 ６１、６４ 鉄筋
６３ スリーブ継手 ６５ 鉄筋挿入孔
７０ 螺条部材 ７１ 螺条
８０ ゴム材 ８１ 連結部
８２ 環状部 DESCRIPTION OF SYMBOLS 10 Upper PC column member 11 Column main reinforcement 12 PC joint member 13 Reinforcing bar insertion hole 14 Lower PC column member 15 Column main reinforcement 16 Sleeve joint 17 Concrete 21, 121 Convex part 22 Line 30 Hose member 31 Rubber material 40, 140 Concrete member 41,141 Grout 50 PC beam member 51 PC joint member 52 Beam main reinforcing bar 53 Reinforcing bar insertion hole 60, 62 PC member 61, 64 Reinforcing bar 63 Sleeve joint 65 Reinforcing bar insertion hole 70 Screw member 71 Screw 80 Rubber material 81 Connecting part 82 Annulus

Claims (8)

鉄筋、ＰＣ鋼線、又はＰＣ鋼材などの応力伝達部材が挿入され、挿入された応力伝達部材との隙間にグラウトが充填されることにより前記応力伝達部材が定着される挿入孔を有するプレキャストコンクリート部材であって、
前記挿入孔の内面に凹凸部が形成されていることを特徴とするプレキャストコンクリート部材。 A precast concrete member having an insertion hole in which a stress transmission member such as a reinforcing bar, PC steel wire, or PC steel is inserted, and the stress transmission member is fixed by filling the gap with the inserted stress transmission member Because
A precast concrete member, wherein an uneven portion is formed on an inner surface of the insertion hole. 請求項１記載のプレキャストコンクリート部材であって、
前記凹凸部を構成する凸部は前記挿入孔の中心側ほど幅が狭くなるような台形の断面形状を有することを特徴とするプレキャストコンクリート部材。 The precast concrete member according to claim 1,
The precast concrete member, wherein the convex portion constituting the concave and convex portion has a trapezoidal cross-sectional shape such that the width becomes narrower toward the center of the insertion hole. 請求項１又は２記載のプレキャストコンクリート部材であって、
前記挿入孔は貫通孔であることを特徴とするプレキャストコンクリート部材。 The precast concrete member according to claim 1 or 2,
The precast concrete member, wherein the insertion hole is a through hole. 請求項１又は２記載のプレキャストコンクリート部材であって、
前記挿入孔は、前記プレキャストコンクリート部材に埋設されたスリーブ継手に連通していることを特徴とするプレキャストコンクリート部材。 The precast concrete member according to claim 1 or 2,
The precast concrete member, wherein the insertion hole communicates with a sleeve joint embedded in the precast concrete member. 請求項１から４何れかに記載のプレキャストコンクリート部材であって、
前記挿入孔の周囲を囲むように螺旋状に成形された番線又は細径の鋼材が埋設されていることを特徴とするプレキャストコンクリート部材。 A precast concrete member according to any one of claims 1 to 4,
A precast concrete member in which a wire or a thin steel material formed in a spiral shape so as to surround the insertion hole is embedded. 請求項１から５何れかに記載のプレキャストコンクリート部材の作成方法であって、
前記挿入孔に相当する位置に、可撓性部材がらせん状に巻きつけられた棒状部材を配置し、
前記プレキャストコンクリート部材を構成するコンクリートを打設し、
前記棒状部材を引抜き、
前記可撓性部材を取り除くことにより前記挿入孔を形成することを特徴とするプレキャストコンクリート部材の作成方法。 A method for producing a precast concrete member according to any one of claims 1 to 5,
A rod-shaped member in which a flexible member is wound in a spiral shape is disposed at a position corresponding to the insertion hole,
Placing the concrete constituting the precast concrete member,
Pull out the rod-shaped member,
A method for producing a precast concrete member, wherein the insertion hole is formed by removing the flexible member. 請求項１から５何れかに記載のプレキャストコンクリート部材の作成方法であって、
前記挿入孔に相当する位置に、複数の環状の可撓性部材が巻きつけられた棒状部材を配置し、
前記プレキャストコンクリート部材を構成するコンクリートを打設し、
前記棒状部材を引抜き、
前記可撓性部材を取り除くことにより前記挿入孔を形成することを特徴とするプレキャストコンクリート部材の作成方法。 A method for producing a precast concrete member according to any one of claims 1 to 5,
A rod-shaped member around which a plurality of annular flexible members are wound is disposed at a position corresponding to the insertion hole,
Placing the concrete constituting the precast concrete member,
Pull out the rod-shaped member,
A method for producing a precast concrete member, wherein the insertion hole is formed by removing the flexible member. 請求項１から５何れかに記載のプレキャストコンクリート部材の作成方法であって、
前記挿入孔に相当する位置に表面に螺条の設けられた螺条部材を配置し、
前記プレキャストコンクリート部材を構成するコンクリートを打設し、
前記螺条部材を回転させながら引抜くことにより前記挿入孔を形成することを特徴とするプレキャストコンクリート部材の作成方法。 A method for producing a precast concrete member according to any one of claims 1 to 5,
A screw member provided with a screw on the surface is arranged at a position corresponding to the insertion hole,
Placing the concrete constituting the precast concrete member,
A method for producing a precast concrete member, wherein the insertion hole is formed by pulling out the screw member while rotating.
JP2006247254A 2006-09-12 2006-09-12 Precast concrete member, and manufacturing method therefor Pending JP2008069519A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101593563B1 (en) 2015-09-15 2016-02-15 케이피이엔씨 주식회사 Column Structure using Precast Concrete Hollow Column, and Constructing Method for such Column Structure
KR101616953B1 (en) * 2015-09-15 2016-04-29 케이피이엔씨 주식회사 Manufacturing Method of Precast Concrete Hollow Column with Inner Shear Groove, and Column Structure using such Precast Concrete Hollow Column
CN105937207A (en) * 2016-05-13 2016-09-14 中冶交通建设集团有限公司 Corrugated pipe for post-tensioned pre-stressed construction, and application method thereof

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JPH0542924B2 (en) * 1988-06-16 1993-06-30 Taisei Corp
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JPH07292770A (en) * 1994-04-27 1995-11-07 Ohbayashi Corp Connective structure between corner post and beam
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JPH0542924B2 (en) * 1988-06-16 1993-06-30 Taisei Corp
JPH0788832A (en) * 1993-09-24 1995-04-04 Taisei Corp Preparation of member for forming sheath hole of pc member and pc member with sheath hole
JPH07292770A (en) * 1994-04-27 1995-11-07 Ohbayashi Corp Connective structure between corner post and beam
JP2726399B2 (en) * 1995-07-26 1998-03-11 新貝工業株式会社 Method and apparatus for molding concrete product
JP2003261986A (en) * 2002-03-07 2003-09-19 Ishikawajima Constr Materials Co Ltd Insert implement
JP2004278257A (en) * 2003-03-19 2004-10-07 Ohbayashi Corp Joining structure of precast concrete column beam and frame structure including the same structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101593563B1 (en) 2015-09-15 2016-02-15 케이피이엔씨 주식회사 Column Structure using Precast Concrete Hollow Column, and Constructing Method for such Column Structure
KR101616953B1 (en) * 2015-09-15 2016-04-29 케이피이엔씨 주식회사 Manufacturing Method of Precast Concrete Hollow Column with Inner Shear Groove, and Column Structure using such Precast Concrete Hollow Column
CN105937207A (en) * 2016-05-13 2016-09-14 中冶交通建设集团有限公司 Corrugated pipe for post-tensioned pre-stressed construction, and application method thereof

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