JP4453370B2 - Precast concrete member manufacturing method and precast concrete member joining method - Google Patents

Precast concrete member manufacturing method and precast concrete member joining method Download PDF

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JP4453370B2
JP4453370B2 JP2004012396A JP2004012396A JP4453370B2 JP 4453370 B2 JP4453370 B2 JP 4453370B2 JP 2004012396 A JP2004012396 A JP 2004012396A JP 2004012396 A JP2004012396 A JP 2004012396A JP 4453370 B2 JP4453370 B2 JP 4453370B2
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precast concrete
hollow
concrete member
mold
hollow part
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JP2005205639A (en
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光生 小柳
英雄 勝俣
守 山田
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Obayashi Corp
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Description

本発明は、プレキャストコンクリート部材、より詳細には、相互に接合され他方に向けて突出する継手用の鉄筋を受け入れてその内部にグラウト等の固化材が注入可能な中空部を備えたプレキャストコンクリート部材の製造方法および接合方法に関する。   The present invention relates to a precast concrete member, and more particularly, a precast concrete member having a hollow portion into which a reinforcing bar for joints that are joined to each other and projecting toward the other is received and into which a solidifying material such as grout can be injected. The present invention relates to a manufacturing method and a joining method.

近年、品質管理、および現場施工の時間短縮等の理由から工場で生産するプレキャストコンクリート部材（以下、ＰＣ部材とする。）が建設現場で使用されるようになってきている。   In recent years, precast concrete members (hereinafter referred to as “PC members”) produced in factories have been used at construction sites for reasons such as quality control and shortening the time for on-site construction.

ＰＣ部材を接合する方法としては、一方のＰＣ部材に定着された鉄筋（差し筋）を他方のＰＣ部材に埋設されたシース管や該ＰＣ部材に形成されたスリーブ孔に挿入し、鉄筋とシース管またはスリーブ孔との間にグラウト等の固化材を注入して一体化するものがある。   As a method of joining PC members, a reinforcing bar (insertion bar) fixed to one PC member is inserted into a sheath tube embedded in the other PC member or a sleeve hole formed in the PC member, and the reinforcing bar and the sheath are inserted. There is one in which a solidifying material such as grout is injected and integrated between the tube or the sleeve hole.

しかしながら、このような従来のＰＣ部材の接合方法にあっては、一方のＰＣ部材に複数の鉄筋を定着し、他方のＰＣ部材に鉄筋を挿入可能な複数のシース管を埋設するか複数のスリーブ孔を形成する必要があり、しかもそれぞれの位置を整合させる必要があるので、ＰＣ部材の製造が煩雑であるという課題があるとともに、接合作業にあたっては、複数の鉄筋をそれぞれ対応するシース管またはスリーブ孔に挿入する必要があり、作業が煩雑で高い精度を要求されるという課題がある。   However, in such a conventional PC member joining method, a plurality of rebars are fixed on one PC member, and a plurality of sheath tubes into which the rebars can be inserted are embedded or a plurality of sleeves. Since it is necessary to form holes and the positions of the holes need to be aligned, there is a problem that the manufacture of the PC member is complicated. There is a problem that it is necessary to insert into the hole, the work is complicated, and high accuracy is required.

そこで本発明は上記問題点を鑑みてなされたものであり、特に、中空部を有するＰＣ部材の簡便な製造方法、および中空部を利用するＰＣ部材の接合方法を提供することを目的とする。   Then, this invention is made | formed in view of the said problem, and it aims at providing the manufacturing method of the PC member which has a hollow part especially, and the joining method of the PC member using a hollow part.

上記の課題を解決する本発明のプレキャストコンクリート部材の製造方法は、他のプレキャストコンクリート部材から突出している継手用の鉄筋を受け入れてその内部にグラウト等の固化材が注入可能な中空部を備えたプレキャストコンクリート部材の製造方法であって、所望の寸法の中抜き構造を形成するための合成樹脂またはゴム製の中空部形成部材をプレキャストコンクリート部材成型用の型枠内に内挿し、該プレキャストコンクリート部材成型用の型枠内にコンクリートを打設し、コンクリートがある程度固化した段階で前記中空部形成部材を取り出すことを特徴とする（第１の発明）。 The method for producing a precast concrete member of the present invention that solves the above-described problem includes a hollow portion into which a reinforcing bar for a joint protruding from another precast concrete member is received and into which a solidifying material such as grout can be injected. A method of manufacturing a precast concrete member, wherein a hollow portion forming member made of synthetic resin or rubber for forming a hollow structure with a desired dimension is inserted into a mold for molding a precast concrete member, and the precast concrete member Concrete is placed in a mold for molding, and the hollow portion forming member is taken out when the concrete is solidified to some extent (first invention).

第２の発明は、第１の発明において、前記中空部形成部材は表面にコッター状の凸凹を有することを特徴とする。   According to a second invention, in the first invention, the hollow portion forming member has a cotter-like unevenness on a surface thereof.

第３の発明は、第１の発明において、前記中空部形成部材は、縦断面形状が逆台形等のアンカー機能を有する形状の発泡スチロール製であって、前記中空部形成部材をビニル等の被覆材で覆い、該被覆材にて覆われた前記中空部形成部材をプレキャストコンクリート部材成型用の型枠内に内挿し、該プレキャストコンクリート部材成型用の型枠内にコンクリートを打設し、コンクリートがある程度固化した段階で前記中空部形成部材を引き抜くことを特徴とする。   According to a third invention, in the first invention, the hollow portion forming member is made of a polystyrene foam having a vertical cross-sectional shape having an anchor function such as an inverted trapezoid, and the hollow portion forming member is made of a covering material such as vinyl. The hollow portion forming member covered with the covering material is inserted into a mold for molding a precast concrete member, and concrete is placed in the mold for molding the precast concrete member. The hollow part forming member is pulled out at the stage of solidification.

第４の発明によるプレキャストコンクリート部材の製造方法は、他のプレキャストコンクリート部材から突出している継手用の鉄筋を受け入れてその内部にグラウト等の固化材が注入可能な中空部を備えたプレキャストコンクリート部材の製造方法であって、前記継手用の鉄筋を複数受け入れ可能な中空部の寸法を有する表面を粗面化した金属製またはコンクリート製の中抜き型枠部材をプレキャストコンクリート部材成型用の型枠内に配設し、該プレキャストコンクリート部材成型用の型枠内にコンクリートを打設し、前記中抜き型枠部材をコンクリート内に残置することを特徴とする。 Method for producing precast concrete parts according to the fourth invention, the precast concrete member solidifying material grout or the like therein is provided with a hollow portion pourable accept reinforcing bar fitting which projects from the other precast concrete parts A manufacturing method, wherein a metal or concrete hollow mold member with a roughened surface having a dimension of a hollow part capable of receiving a plurality of reinforcing bars for joints is placed in a mold for molding a precast concrete member It is disposed, concrete is placed in a mold for molding the precast concrete member, and the hollow mold member is left in the concrete.

第５の発明は、第１〜４のいずれかの発明において製造されたプレキャストコンクリート部材を接合する方法であって、第１のプレキャストコンクリート部材と第２のプレキャストコンクリート部材を現場にて建て込んで両方の接合面を対向させ、該第１のプレキャストコンクリート部材から突出している複数の鉄筋を、前記第２のプレキャストコンクリート部材の中空部に挿入し、該中空部にグラウト材を注入して一体化させるプレキャストコンクリート部材を接合することを特徴とする。   5th invention is the method of joining the precast concrete member manufactured in any one of 1st-4th invention, Comprising: The 1st precast concrete member and the 2nd precast concrete member are built in the field. Both joint surfaces are made to face each other, and a plurality of reinforcing bars protruding from the first precast concrete member are inserted into a hollow portion of the second precast concrete member, and a grout material is injected into the hollow portion to be integrated. It is characterized by joining precast concrete members.

中空部を有するＰＣ部材の簡便な製造方法、および中空部を利用するＰＣ部材の接合方法を提供する。   A simple method for producing a PC member having a hollow part and a method for joining PC members using the hollow part are provided.

以下、この発明の好ましい実施の形態、すなわち実施例について図面を用いて詳細に説明する。   Hereinafter, preferred embodiments of the present invention, that is, examples will be described in detail with reference to the drawings.

図１は第一実施例にかかる中空部形成部材を示す図である。図１に示すとおり、中空部形成部材１００は、ＰＣ部材の中空部の形成に使用される物で、例えば、伸縮性を有するバルーンであって、バルブ１０１から圧縮空気を注入して膨張させると、大きさは幅７０ｃｍ、奥行き１５ｃｍ、高さ８０ｃｍの直方体となる。   FIG. 1 is a view showing a hollow portion forming member according to the first embodiment. As shown in FIG. 1, the hollow part forming member 100 is an object used for forming a hollow part of a PC member. For example, the hollow part forming member 100 is a balloon having elasticity and is inflated by injecting compressed air from a valve 101. The size is a rectangular parallelepiped having a width of 70 cm, a depth of 15 cm, and a height of 80 cm.

本実施例では、コンクリートからの剥離性が良い塩ビ製のオカモト社のエアーウォール（商品名）を使用した。エアーウォールは耐久性に富んでおり繰り返し使用ができるために、経済的である。   In this example, an air wall (trade name) manufactured by Okamoto Co., Ltd., made of PVC, which has good peelability from concrete was used. Airwalls are economical because they are durable and can be used repeatedly.

また、中空部形成部材１００の外面と接するＰＣ部材側の界面を凸凹状に賦形してＰＣ部材の接合後のＰＣ部材間の引き抜き強度を確保するために、縦断面が三角柱状もしくは台形状のゴム製コッター１０２を中空部形成部材１００の外面に水平状に取り付ける。   Moreover, in order to shape the interface on the PC member side in contact with the outer surface of the hollow portion forming member 100 in an uneven shape and ensure the pulling strength between the PC members after joining the PC members, the longitudinal section has a triangular prism shape or a trapezoidal shape. The rubber cotter 102 is horizontally attached to the outer surface of the hollow part forming member 100.

本実施例では、例えば、鉛直断面形状が三角形で、底面、高さはそれぞれ１ｍｍ以上５ｍｍ以下程度、長さはエアーウォールの幅と同等程度の三角柱状のゴム製コッターを使用する。中空部形成部材除去に際して、コッターがコンクリートに付着して残置されることが無いように必要に応じてコッターの表面にあらかじめ潤滑材を塗布する。   In the present embodiment, for example, a triangular pillar-shaped rubber cotter having a vertical cross-sectional shape of a triangle, a bottom surface and a height of about 1 mm to about 5 mm, and a length equivalent to the width of the air wall is used. When removing the hollow portion forming member, if necessary, a lubricant is applied to the surface of the cotter in advance so that the cotter does not adhere and remain on the concrete.

図２は第一実施例にかかる中空部形成部材を使用するＰＣ部材の製造方法を示し、（ａ）は外枠、内枠および中空部形成部材を設置した状態の断面図、（ｂ）は中空部形成部材設置後、ＰＣ部材成型用の型枠内にコンクリートを打設した状態の断面図である。   FIG. 2 shows a method of manufacturing a PC member using the hollow part forming member according to the first embodiment, (a) is a cross-sectional view of the outer frame, the inner frame and the hollow part forming member installed, (b) It is sectional drawing of the state which poured concrete in the mold for PC member shaping | molding after installation of a hollow part formation member.

図２（ａ）に示すとおり、ベッドと呼ばれる表面が平らな底板２００上に、外枠２０１を底板２００に対してある一定の角度になるようにクランプ等の固定治具を利用して取り付ける。この外枠２０１の内側に内枠２０２を外枠２０１と平行になるように底板２００上に取り付ける。内枠２０２は両端部にグラウト注入用の貫通孔と空気抜き用の貫通孔を備えており、下方部にはグラウト注入孔２０３が、上方には空気抜き孔２０４がそれぞれ形成されている。   As shown in FIG. 2A, the outer frame 201 is attached on the bottom plate 200 having a flat surface called a bed by using a fixing jig such as a clamp so as to have a certain angle with respect to the bottom plate 200. An inner frame 202 is attached to the inner side of the outer frame 201 on the bottom plate 200 so as to be parallel to the outer frame 201. The inner frame 202 is provided with a grout injection through hole and an air vent through hole at both ends, and a grout injection hole 203 is formed in the lower part and an air vent hole 204 is formed in the upper part.

あらかじめ萎んだ状態の中空部形成部材１００をバルブ１０１から圧縮空気を送り膨張させる。このバルブ１０１はグラウト注入孔として後で利用する。   The hollow portion forming member 100 in a previously deflated state is expanded by sending compressed air from the valve 101. This valve 101 will be used later as a grout injection hole.

中空部形成部材１００を固定した後、グラウト時の空気抜きのためのパイプ２０５を取り付ける。このパイプ２０５は中空部形成部材１００を穿通する必要は無く、中空部形成部材１００の外面に定着していれば良い。   After fixing the hollow part forming member 100, a pipe 205 for removing air during grouting is attached. The pipe 205 does not need to penetrate the hollow portion forming member 100 and may be fixed to the outer surface of the hollow portion forming member 100.

上記方法で１つのＰＣ部材に必要に応じて複数の中空部を作成することが可能である。   It is possible to create a plurality of hollow portions in one PC member as necessary by the above method.

外枠２０１、内枠２０２、中空部形成部材１００を設置後、図２（ｂ）に示すとおり、ＰＣ部材間の継手用の複数の鉄筋２０６（本図では例として１本だけ表示）をＰＣ部材の上端側接合面に対して垂直に、かつ一端を約０．６ｍ程度突出させた状態となるように突出部２０７を作成する。   After installing the outer frame 201, the inner frame 202, and the hollow portion forming member 100, as shown in FIG. 2 (b), a plurality of reinforcing bars 206 for joints between PC members (only one is shown as an example in the figure) is displayed on the PC. The projecting portion 207 is formed so as to be perpendicular to the upper end side joining surface of the member and have one end projecting by about 0.6 m.

上記方法で１つのＰＣ部材に中空部と同数の突出部を作成することが可能である。   By the above method, it is possible to create the same number of protrusions as the hollow part on one PC member.

そして、外枠２０１と内枠２０２との間にコンクリートを打設し、打設後徐々にコンクリートが固まり始め、コンクリートが変形しない程度に固化した状態で、中空部形成部材１００を抜き出す。抜き出す際には、中空部形成部材１００から空気を抜いて、萎ませてコンクリート面から剥がれ易くしてから除去することによりＰＣ部材中の中空部２０８を作成する。   Then, concrete is placed between the outer frame 201 and the inner frame 202, and after the placement, the concrete starts to harden gradually, and the hollow portion forming member 100 is extracted in a state where the concrete is solidified so as not to deform. When extracting, the hollow part 208 in a PC member is created by removing air after extracting air from the hollow part forming member 100 and making it easy to peel off from the concrete surface.

中空部形成部材１００除去後、グラウト注入孔２０３、および空気抜き孔２０４が中空部２０８と貫通しているかの確認を行う。   After the hollow part forming member 100 is removed, it is confirmed whether the grout injection hole 203 and the air vent hole 204 penetrate the hollow part 208.

図３は第一実施例にかかるＰＣ部材の接合方法を示す、図３（ａ）は接合する２つのＰＣ部材を設置した状態の断面図、図３（ｂ）は中空部にグラウト注入した状態の断面図、図３（ｃ）は閉鎖型鉄筋を使用した状態の略図である。   FIG. 3 shows a method for joining PC members according to the first embodiment, FIG. 3 (a) is a sectional view showing a state in which two PC members to be joined are installed, and FIG. FIG. 3C is a schematic view of a state where a closed type reinforcing bar is used.

図３（ａ）に示すとおり、第１のＰＣ部材３００と第２のＰＣ部材３０１を現場にて建て込んで両方の接合面を対向させ、第１のＰＣ部材３００の上端側接合面に中空部部分だけ型抜きされたシール材３０２を接合面全体に取り付ける。
第１のＰＣ部材３００の上端側接合面から突出している突出部２０７を、第２のＰＣ部材３０１の下端側接合面に開口している中空部２０８に挿入する。 As shown in FIG. 3 (a), the first PC member 300 and the second PC member 301 are built in the field so that both joint surfaces face each other, and the first PC member 300 is hollow on the upper joint surface. A sealing material 302 that is die-cut only at a portion is attached to the entire joining surface.
The protruding portion 207 protruding from the upper end side joining surface of the first PC member 300 is inserted into the hollow portion 208 opened to the lower end side joining surface of the second PC member 301.

そして、図３（ｂ）に示すとおり、グラウト注入孔２０３からグラウト材を中空部２０８に注入し、エア抜き孔２０４から空気を抜いて、複数の鉄筋２０６を備えた突出部２０７をまとめてグラウトすることにより、第１のＰＣ部材３００と第２のＰＣ部材３０１とを一体化させる。   Then, as shown in FIG. 3 (b), a grout material is injected into the hollow portion 208 from the grout injection hole 203, the air is extracted from the air vent hole 204, and the protruding portions 207 having a plurality of reinforcing bars 206 are gathered together. By doing so, the first PC member 300 and the second PC member 301 are integrated.

第２のＰＣ部材３０１の中空部２０８の界面には前述のように凸凹が形成されているので第１のＰＣ部材３００と第２のＰＣ部材３０１の引き抜き強度が非常に大きくなる。   Since the unevenness is formed at the interface of the hollow portion 208 of the second PC member 301 as described above, the pull-out strength between the first PC member 300 and the second PC member 301 becomes very large.

そして、グラウト材注入後、中１日の養生期間を取り、この養生期間中に第２のＰＣ部材の上位となる第３のＰＣ部材の設置を行う（図示せず）。第３のＰＣ部材の設置後、上記グラウト作業を行い、第２のＰＣ部材と第３のＰＣ部材を接合する。本作業を繰り返して行い、例えば、塔体を建設する。   And after grout injection | pouring, the curing period of 1st is taken, and installation of the 3rd PC member used as the upper rank of the 2nd PC member is performed during this curing period (not shown). After the installation of the third PC member, the grouting operation is performed to join the second PC member and the third PC member. Repeat this work to build towers, for example.

また、図３（ｃ）に示すとおり、逆Ｕ字形の閉鎖型鉄筋３０３を使用することにより、定着長を短くすることが可能である。   In addition, as shown in FIG. 3C, the fixing length can be shortened by using an inverted U-shaped closed reinforcing bar 303.

図４は第一実施例にかかる（ａ）中空部を有するＰＣ部材単体の斜視図、（ｂ）中空部を有するＰＣ部材を接合して形成された塔体の概略図である。   4A is a perspective view of a PC member having a hollow part according to the first embodiment, and FIG. 4B is a schematic view of a tower formed by joining PC members having a hollow part.

図４（ａ）に示すとおり、前述した方法で製造されたＰＣ部材３００は、例えば、大きさは底面径４．５ｍ、高さは２ｍ、肉厚４０ｃｍであり、中空部２０８は８箇所、ＰＣ部材間の継手用の３本の鉄筋を備えた突出部２０７は中空部２０８と同数の８箇所を有する。本実施例では、鉄筋突出部１箇所において３本の鉄筋を示しているが、本数は必要に応じて変化させることが可能である。また、中空部の大きさ、および数も必要に応じて変化させることが可能である。   As shown in FIG. 4A, the PC member 300 manufactured by the above-described method has, for example, a size having a bottom diameter of 4.5 m, a height of 2 m, and a thickness of 40 cm, and eight hollow portions 208, The protrusion part 207 provided with the three reinforcing bars for the joint between the PC members has the same number of eight places as the hollow part 208. In this embodiment, three reinforcing bars are shown in one reinforcing bar protrusion, but the number can be changed as necessary. Further, the size and number of the hollow portions can be changed as necessary.

図４（ｂ）に示すとおり、前述した方法で製造されたＰＣ部材３００を風力発電の円錐形状の塔体４００に適用した例を示すもので、最上部から最低部までその勾配が一定に連続すべく高さ方向に８分割して作られたＰＣ部材を積上げたものである（実際の塔体は３０分割等の多数に分割されるが、説明の便宜上、ここではモデル的に８分割とした）。   As shown in FIG. 4B, an example in which the PC member 300 manufactured by the above-described method is applied to a cone-shaped tower body 400 of wind power generation, and the gradient is continuously constant from the top to the bottom. PC members made up of 8 parts in the height direction are piled up (the actual tower is divided into a large number of parts such as 30 parts, but for convenience of explanation, here it is modeled as 8 parts. did).

図５は第二実施例にかかる金属製中抜き型枠部材を示す、（ａ）山形中抜き型枠部材断面図、（ｂ）テーパー形中抜き型枠部材断面図である。   FIGS. 5A and 5B show a metal hollow mold member according to the second embodiment, wherein FIG. 5A is a cross-sectional view of a chevron hollow mold member and FIG. 5B is a cross-sectional view of a tapered hollow mold member.

第二実施例では、金属製中抜き型枠部材を捨て型枠として利用し、コンクリート打設後、脱型せずに、金属製中抜き型枠部材の開口部をそのままＰＣ部材の中空部として利用する。また、第二実施例にかかるＰＣ部材製造方法で第一実施例と同様の技術を用いたものと対応する部分には同一の符号を付して、説明を省略する。   In the second embodiment, the metal hollow mold member is used as a discarded mold frame, and after the concrete is placed, the opening of the metal hollow mold member is directly used as the hollow part of the PC member without demolding. Use. Further, in the PC member manufacturing method according to the second embodiment, portions corresponding to those using the same technique as in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

図５（ａ）に示すとおり、ＰＣ部材の中空部の形成に使用される山形中抜き型枠部材５００は、ＰＣ部材間同士の引き抜き強度を確保するために山形中抜き型枠部材５００の本体形状は山形状を有し、表面５０１は円形状または四角形状の凸凹のエンボス加工を施すことにより粗面化した金属製中抜き型枠部材である。   As shown in FIG. 5A, the chevron hollow mold member 500 used for forming the hollow portion of the PC member is a main body of the chevron hollow mold member 500 in order to ensure the pulling strength between the PC members. The shape is a mountain shape, and the surface 501 is a metal hollow mold member roughened by embossing a circular or quadrangular unevenness.

図５（ｂ）に示すとおり、ＰＣ部材の中空部の形成に使用されるテーパー形中抜き型枠部材５０２は、ＰＣ部材間同士の引き抜き強度を確保するためにテーパー形中抜き型枠部材５０２の本体の内面側形状はテーパー形状を有し、表面５０３は円形状または四角形状の凸凹のエンボス加工を施すことにより粗面化した金属製中抜き型枠部材である。   As shown in FIG. 5B, the tapered hollow mold member 502 used for forming the hollow portion of the PC member has a tapered hollow mold member 502 to ensure the pulling strength between the PC members. The inner surface of the main body has a tapered shape, and the surface 503 is a metal hollow form member whose surface is roughened by embossing a circular or quadrangular irregularity.

山形中抜き型枠部材５００およびテーパー形中抜き型枠部材５０２の下方部にはグラウト注入孔５０４が、上方には空気抜き孔５０５がそれぞれ形成されている。   A grout injection hole 504 is formed in the lower part of the chevron hollow mold member 500 and the tapered hollow mold member 502, and an air vent hole 505 is formed in the upper part.

図６は第二実施例にかかる金属製中抜き型枠部材を使用するＰＣ部材製造方法を示し、（ａ）は外枠、内枠および金属製中抜き型枠部材を設置した状態の断面図、（ｂ）は金属製中抜き型枠部材設置後、ＰＣ部材成型用の型枠内にコンクリートを打設した状態の断面図である。   FIG. 6: shows the PC member manufacturing method which uses the metal hollow formwork member concerning 2nd Example, (a) is sectional drawing of the state which installed the outer frame, the inner frame, and the metal hollow formwork member (B) is sectional drawing of the state which laid concrete in the mold for PC member shaping | molding after metal hollow mold member installation.

第二実施例にかかるＰＣ部材製造方法で第一実施例と同様の技術を用いたものと対応する部分には同一の符号を付して、説明を省略する。なお、説明はテーパー形状中抜き型枠部材５０２を用いて行う。   In the PC member manufacturing method according to the second embodiment, portions corresponding to those using the same technique as in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. The description will be made using a tapered hollow mold member 502.

図６（ａ）に示すとおり、まず、第一実施例と同様に底板２００、外枠２０１、内枠２０２を設置する。   As shown in FIG. 6A, first, the bottom plate 200, the outer frame 201, and the inner frame 202 are installed as in the first embodiment.

次に、外枠２０１の内面とテーパー形状中抜き型枠部材５０２の外面６００との間隔と、内枠２０２の外面とテーパー形状中抜き型枠部材５０２の外面６００との間隔が等しくなるように、かつＰＣ部材の下端側接合面の一部を開口させるためにテーパー形状中抜き型枠部材５０２の開口部が底板２００に接するように、テーパー形状中抜き型枠部材５０２を設置する。   Next, the distance between the inner surface of the outer frame 201 and the outer surface 600 of the tapered hollow mold member 502 is made equal to the gap between the outer surface of the inner frame 202 and the outer surface 600 of the tapered hollow mold member 502. In addition, the tapered hollow mold member 502 is installed so that the opening of the tapered hollow mold member 502 is in contact with the bottom plate 200 in order to open a part of the joint surface on the lower end side of the PC member.

また、複数の棒鋼６０１はＰＣ接合部が引っ張り荷重を受けた際に、金属製中抜き型枠部材の内面の開き止めの役割を果たして引き抜き強度を確保し、かつ、コンクリート打設時に金属製中抜き型枠部材が側圧変形するのを防ぐ機能を有する。   Further, when the PC joint portion receives a tensile load, the plurality of steel bars 601 serve to prevent the inner surface of the metal punching mold member from opening, and ensure the pulling strength. It has a function of preventing the punching mold member from undergoing lateral pressure deformation.

そして、図６（ｂ）に示すとおり、第一実施例（図２（ｂ））と同様に外枠２０１と内枠２０２との間にコンクリートを打設し、コンクリートを固化させる。テーパー形状中抜き型枠部材５０２はコンクリート固化後、脱型しないために施工性が向上する。   Then, as shown in FIG. 6 (b), concrete is placed between the outer frame 201 and the inner frame 202 in the same manner as in the first embodiment (FIG. 2 (b)), and the concrete is solidified. Since the taper-shaped hollow mold member 502 is not demolded after the concrete is solidified, workability is improved.

本実施例におけるＰＣ部材の接合方法は、第１のＰＣ部材の上端側接合面から突出している複数の鉄筋を備えた突出部２０７を、第２のＰＣ部材の下端側接合面に開口している中空部６０２に挿入する（図示せず）。   In this embodiment, the PC member is joined by opening the protruding portion 207 having a plurality of reinforcing bars protruding from the upper end side joining surface of the first PC member to the lower end side joining surface of the second PC member. (Not shown).

また、第一実施例（図３（ｂ））と同様に、グラウト注入孔５０４からグラウト材を中空部６０２に注入し、エア抜き孔５０５から空気を抜いて、複数の鉄筋２０６を備えた突出部２０７をまとめてグラウトすることにより、第１のＰＣ部材と第２のＰＣ部材とを一体化させる（図示せず）。鉄筋２０６は閉鎖型鉄筋３０３とすることで定着長を短くすることが可能である。   Further, similarly to the first embodiment (FIG. 3B), a grout material is injected into the hollow portion 602 from the grout injection hole 504, the air is extracted from the air vent hole 505, and a protrusion having a plurality of reinforcing bars 206 is provided. The first PC member and the second PC member are integrated (not shown) by grouting the parts 207 together. Since the reinforcing bar 206 is a closed type reinforcing bar 303, the fixing length can be shortened.

図７は第三実施例にかかる中空部形成部材を示す図である。
第三実施例にかかるＰＣ部材製造方法で第一または第二実施例と同様の技術を用いたものと対応する部分には同一の符号を付して、説明を省略する。 FIG. 7 is a view showing a hollow portion forming member according to the third embodiment.
In the PC member manufacturing method according to the third embodiment, parts corresponding to those using the same technique as in the first or second embodiment are denoted by the same reference numerals, and description thereof is omitted.

図７に示すとおり、中空部形成部材７００は、中抜き型枠部材の中空部の形成に使用される物で、例えば、直方体の発泡スチロールである。   As shown in FIG. 7, the hollow portion forming member 700 is used for forming the hollow portion of the hollow mold member, and is, for example, a rectangular solid foam.

また、中空部形成部材７００の外面と接する中抜き型枠部材側の界面を凸凹状に賦形してＰＣ部材の接合後のＰＣ部材間の引き抜き強度を確保するために、縦断面が三角柱状もしくは台形状のウレタン製コッター７０１を中空部形成部材７００の外面に水平状に取り付ける。   Further, in order to shape the interface on the side of the hollow mold member in contact with the outer surface of the hollow part forming member 700 in an uneven shape, and to ensure the pulling strength between the PC members after joining the PC members, the longitudinal section has a triangular prism shape. Alternatively, a trapezoidal urethane cotter 701 is attached horizontally to the outer surface of the hollow portion forming member 700.

本実施例では、ウレタン製コッター７０１は、図７の一部拡大図に示すように、例えば、鉛直断面形状が台形で、長さは中空部形成部材７００の幅と同等程度の台形柱状である。中空部形成部材７００の除去に際して、コッター７０１がコンクリートに付着して残置されることが無いように必要に応じてコッター７０１の表面にあらかじめ潤滑剤を塗布する。   In the present embodiment, the urethane cotter 701 is, for example, a trapezoidal columnar shape having a trapezoidal vertical cross-sectional shape and a length equivalent to the width of the hollow portion forming member 700, as shown in a partially enlarged view of FIG. . When removing the hollow portion forming member 700, a lubricant is applied in advance to the surface of the cotter 701 as necessary so that the cotter 701 does not adhere to the concrete and remain.

図８は第三実施例にかかる中抜き型枠部材のうちの門形中抜き型枠部材断面図である。   FIG. 8 is a cross-sectional view of a gate-shaped hollow mold member of the hollow mold members according to the third embodiment.

図８に示すとおり、ＰＣ部材の中空部の形成に使用される門型中抜き型枠部材８００は、ＰＣ部材間同士の引き抜き強度を確保するために門型中抜き型枠部材８００の本体の内面側形状はコッター状の凸凹を有し、表面８０２は円形状あるいは四角形状の凸凹のエンボス加工を施すことにより粗面化したコンクリート製中抜き型枠部材である。   As shown in FIG. 8, the gate-type hollow mold member 800 used for forming the hollow portion of the PC member has a main body of the gate-type hollow mold member 800 in order to ensure the pulling strength between the PC members. The inner surface has a cotter-like unevenness, and the surface 802 is a concrete hollow mold member roughened by embossing a circular or quadrangular unevenness.

次に門形中抜き型枠部材８００の製造方法を記す。
まず、ベッドと呼ばれる表面が平らな底板上に所望の寸法を形成するための外枠を底板に対して垂直に取り付ける。この外枠で囲まれた内側に中空部形成部材７００の中心と中抜き型枠部材８００の中心が一致するように中空部形成部材７００を底板上に取り付ける（図示せず）。 Next, a manufacturing method of the portal hollow mold member 800 will be described.
First, an outer frame for forming a desired dimension on a bottom plate having a flat surface called a bed is attached perpendicularly to the bottom plate. The hollow portion forming member 700 is mounted on the bottom plate so that the center of the hollow portion forming member 700 and the center of the hollow mold member 800 are aligned with the inside surrounded by the outer frame (not shown).

そして、中空部形成部材７００を固定した後、グラウト注入用のパイプ５０４とグラウト時の空気抜きのためのパイプ５０５を取り付ける。パイプ５０４、５０５は中空部形成部材７００を穿通する必要は無く、中空部形成部材７００の外面に定着していれば良い。   And after fixing the hollow part formation member 700, the pipe 504 for grouting and the pipe 505 for venting air at the time of grouting are attached. The pipes 504 and 505 do not need to penetrate the hollow portion forming member 700, and may be fixed to the outer surface of the hollow portion forming member 700.

そして、外枠と中空部形成部材７００との間にコンクリートを打設し、打設後徐々にコンクリートが固まり始め、コンクリートが変形しない程度に固化した状態で、中空部形成部材７００を抜き出す。   Then, concrete is placed between the outer frame and the hollow portion forming member 700, and after the placement, the concrete gradually starts to harden, and the hollow portion forming member 700 is extracted in a state where the concrete is solidified so as not to deform.

中空部形成部材７００を除去後、グラウト注入孔５０４と空気抜き孔５０５が中空部と貫通しているかの確認を行う。したがって、門形中抜き型枠部材８００下方部にはグラウト注入孔５０４が、上方には空気抜き孔５０５がそれぞれ形成されている。   After removing the hollow portion forming member 700, it is confirmed whether the grout injection hole 504 and the air vent hole 505 pass through the hollow portion. Accordingly, a grout injection hole 504 is formed in the lower part of the portal hollow mold member 800, and an air vent hole 505 is formed in the upper part.

図９は第三実施例にかかる門形中抜き型枠部材を使用するＰＣ部材製造方法を示し、門形中抜き型枠部材設置後、ＰＣ部材成型用の型枠内にコンクリートを打設した状態の断面図である。   FIG. 9 shows a PC member manufacturing method using a portal hollow mold member according to the third embodiment. After installing the portal hollow mold member, concrete was placed in the mold for molding the PC member. It is sectional drawing of a state.

図９に示すとおり、まず、第一および第二実施例と同様に底板２００、外枠２０１、内枠２０２を設置する。
次に、外枠２０１の内面と門形中抜き型枠部材８００の外面８０２との間隔と、内枠２０２の外面と門形中抜き型枠部材８００の外面８０２との間隔が等しくなるように、かつＰＣ部材の下端側接合面の一部を開口させるために門形中抜き型枠部材８００の開口部が底板２００に接するように、門形中抜き型枠部材８００を設置する。
そして、外枠２０１と内枠２０２との間にコンクリートを打設し、コンクリートを固化させる。門形中抜き型枠部材８００はコンクリート固化後、脱型しないために施工性が向上する。 As shown in FIG. 9, first, the bottom plate 200, the outer frame 201, and the inner frame 202 are installed as in the first and second embodiments.
Next, the distance between the inner surface of the outer frame 201 and the outer surface 802 of the portal hollow mold member 800 is made equal to the distance between the outer surface of the inner frame 202 and the outer surface 802 of the portal hollow mold member 800. In addition, the portal hollow mold member 800 is installed so that the opening of the portal hollow mold member 800 is in contact with the bottom plate 200 in order to open a part of the lower end side joining surface of the PC member.
Then, concrete is placed between the outer frame 201 and the inner frame 202 to solidify the concrete. Since the portal hollow mold member 800 is not demolded after the concrete is solidified, workability is improved.

図１０は第四実施例にかかる中空部形成部材を使用するＰＣ部材の製造方法を示し、中空部形成部材設置後、ＰＣ部材成型用の型枠内にコンクリートを打設した状態の断面図である。   FIG. 10 shows a method for manufacturing a PC member using the hollow part forming member according to the fourth embodiment, and is a cross-sectional view showing a state in which concrete is placed in a mold for molding a PC member after the hollow part forming member is installed. is there.

第四実施例にかかるＰＣ部材の製造方法で第一から第三実施例のいずれかと同様の技術を用いたものと対応する部分には同一の符号を付して、説明を省略する。   Parts corresponding to those using the same technique as in any of the first to third embodiments in the PC member manufacturing method according to the fourth embodiment are denoted by the same reference numerals, and description thereof is omitted.

図１０に示すとおり、中空部形成部材１０００は、ＰＣ部材の中空部１００１の形成に使用される物で、例えば、縦断面形状が逆台形の発泡スチロールである。   As shown in FIG. 10, the hollow portion forming member 1000 is used for forming the hollow portion 1001 of the PC member, and is, for example, a foamed polystyrene having an inverted trapezoidal longitudinal sectional shape.

発泡スチロール等の中空部形成部材１０００の除去に際しては、破損してＰＣ部材内に残置されることが無いように、中空部形成部材１０００を必要に応じてビニル等の被覆材１００２にて覆う。   When removing the hollow portion forming member 1000 such as polystyrene foam, the hollow portion forming member 1000 is covered with a covering material 1002 such as vinyl as necessary so as not to be damaged and remain in the PC member.

次に中空部１００１を有するＰＣ部材の製造方法を記す。
まず、第一実施例と同様に底板２００、外枠２０１、内枠２０２を設置する。
次に、外枠２０１の内面と中空部形成部材１０００の外面との間隔と、内枠２０２の外面と中空部形成部材１０００の外面との間隔が等しくなるように、かつＰＣ部材の下端側接合面の一部を開口させるために中空部形成部材１０００が底板２００に接するように中空部形成部材１０００を設置する。 Next, the manufacturing method of PC member which has the hollow part 1001 is described.
First, as in the first embodiment, the bottom plate 200, the outer frame 201, and the inner frame 202 are installed.
Next, the lower end side bonding of the PC member is performed so that the interval between the inner surface of the outer frame 201 and the outer surface of the hollow portion forming member 1000 is equal to the interval between the outer surface of the inner frame 202 and the outer surface of the hollow portion forming member 1000. In order to open a part of the surface, the hollow part forming member 1000 is installed so that the hollow part forming member 1000 is in contact with the bottom plate 200.

また、複数の棒鋼６０１を必要に応じて設置する（図示せず）。
そして、第一実施例と同様に外枠２０１と内枠２０２との間にコンクリートを打設する。 Moreover, the some steel bar 601 is installed as needed (not shown).
Then, concrete is placed between the outer frame 201 and the inner frame 202 as in the first embodiment.

コンクリート打設後、徐々にコンクリートが固まり始め、コンクリートが変形しない程度に固化した状態で、ビニル等の被覆材１００２に覆われた中空部形成部材１０００を被覆材１００２といっしょに抜き出す。中空部形成部材１０００を抜き出す際には、発泡スチロールの弾性変形可能な性質を利用して形状を変形させつつ引き抜いて除去することによりＰＣ部材中の門形形状の中空部１００１を作成する。   After the concrete is placed, the hollow portion forming member 1000 covered with the covering material 1002 such as vinyl is extracted together with the covering material 1002 in a state where the concrete gradually solidifies and does not deform. When the hollow portion forming member 1000 is extracted, the portal-shaped hollow portion 1001 in the PC member is created by pulling and removing while deforming the shape using the elastically deformable property of the polystyrene foam.

中空部形成部材１０００除去後、グラウト注入孔２０３、および空気抜き孔２０４が中空部１００１と貫通しているかの確認を行う。   After the hollow part forming member 1000 is removed, it is confirmed whether the grout injection hole 203 and the air vent hole 204 penetrate the hollow part 1001.

第三および第四実施例において製作されるＰＣ部材の接合方法は、第一および第二実施例のＰＣ部材接合方法と同様である。   The PC member joining method manufactured in the third and fourth embodiments is the same as the PC member joining method in the first and second embodiments.

また、第二から第四実施例のいずれかにおいて製造されたＰＣ部材は第一実施例で示した塔体に使用が可能である。   The PC member manufactured in any of the second to fourth embodiments can be used for the tower shown in the first embodiment.

第一実施例にかかる中空部形成部材を示す図である。It is a figure which shows the hollow part formation member concerning a 1st Example. 第一実施例にかかる中空部形成部材を使用するＰＣ部材の製造方法を示し、（ａ）は外枠、内枠および中空部形成部材を設置した状態の断面図、（ｂ）は中空部形成部材設置後、ＰＣ部材成型用の型枠内にコンクリートを打設した状態の断面図である。The manufacturing method of the PC member which uses the hollow part formation member concerning 1st Example is shown, (a) is sectional drawing of the state which installed the outer frame, the inner frame, and the hollow part formation member, (b) is hollow part formation It is sectional drawing of the state which poured concrete into the mold for PC member shaping | molding after member installation. 第一実施例にかかるＰＣ部材の接合方法を示し、接合する２つのＰＣ部材を設置した状態の断面図である。It is sectional drawing of the state which showed the joining method of the PC member concerning a 1st Example, and installed two PC members to join. 第一実施例にかかるＰＣ部材の接合方法を示し、中空部にグラウト注入した状態の断面図である。It is sectional drawing of the state which showed the joining method of the PC member concerning a 1st Example, and grout-injected into the hollow part. 第一実施例にかかるＰＣ部材の接合方法を示し、閉鎖型鉄筋を使用した状態の略図である。It shows the joining method of the PC member concerning a 1st Example, and is the schematic of the state which used the closed type reinforcement. 第一実施例にかかり、（ａ）は中空部を有するＰＣ部材単体の斜視図、（ｂ）は中空部を有するＰＣ部材を接合して形成された塔体の概略図である。FIG. 2A is a perspective view of a single PC member having a hollow part according to the first embodiment, and FIG. 2B is a schematic view of a tower formed by joining PC members having a hollow part. 第二実施例にかかる金属製中抜き型枠部材を示し、（ａ）は山形中抜き型枠部材断面図、（ｂ）はテーパー形中抜き型枠部材断面図である。The metal hollow mold member concerning a 2nd example is shown, (a) is a mountain-shaped hollow mold member sectional view, and (b) is a taper hollow mold member sectional view. 第二実施例にかかる金属製中抜き型枠部材を使用するＰＣ部材製造方法を示し、（ａ）は外枠、内枠および金属製中抜き型枠部材を設置した状態の断面図、（ｂ）は金属製中抜き型枠部材設置後、ＰＣ部材成型用の型枠内にコンクリートを打設した状態の断面図である。The PC member manufacturing method which uses the metal hollow mold member concerning 2nd Example is shown, (a) is sectional drawing of the state which installed the outer frame, the inner frame, and the metal hollow mold member, (b ) Is a cross-sectional view showing a state in which concrete is placed in a mold for molding a PC member after the metal hollow mold member is installed. 第三実施例にかかる中空部形成部材を示す図である。It is a figure which shows the hollow part formation member concerning a 3rd Example. 第三実施例にかかる中抜き型枠部材のうちの門形中抜き型枠部材断面図である。It is sectional drawing of the portal shape hollow mold member among hollow mold members concerning a 3rd example. 第三実施例にかかる門形中抜き型枠部材を使用するＰＣ部材製造方法を示し、門形中抜き型枠部材設置後、ＰＣ部材成型用の型枠内にコンクリートを打設した状態の断面図である。A cross section of a state in which concrete is placed in a mold for molding PC members after installing a portal hollow mold member and showing a PC member manufacturing method using the portal hollow mold member according to the third embodiment. FIG. 第四実施例にかかる中空部形成部材を使用するＰＣ部材の製造方法を示し、中空部形成部材設置後、ＰＣ部材成型用の型枠内にコンクリートを打設した状態の断面図である。The manufacturing method of PC member which uses the hollow part formation member concerning 4th Example is shown, and after hollow part formation member installation, it is sectional drawing of the state which laid concrete in the formwork for PC member shaping | molding.

符号の説明Explanation of symbols

１００、７００、１０００ 中空部形成部材
１０２ ゴム製コッター
２０３ グラウト注入孔
２０４ 空気抜き孔
２０６ 鉄筋
２０７ 突出部
２０８、６０２、１００１ 中空部
３００ 第１のＰＣ部材
３０１ 第２のＰＣ部材
３０３ 閉鎖型鉄筋
４００ 塔体
５００ 山形中抜き型枠部材
５０２ テーパー形中抜き型枠部材
５０４ グラウト注入孔
５０５ 空気抜き孔
６０１ 棒鋼
７０１ ゴム製コッター
８００ 門形中抜き型枠部材
１００２ 被覆材 100, 700, 1000 Hollow part forming member 102 Rubber cotter 203 Grout injection hole 204 Air vent hole 206 Reinforcing bar 207 Projection part 208, 602, 1001 Hollow part 300 First PC member 301 Second PC member 303 Closed type reinforcing bar 400 Tower Body 500 Angle hollow mold member 502 Tapered hollow mold member 504 Grout injection hole 505 Air vent hole 601 Steel bar 701 Rubber cotter 800 Portal hollow mold member 1002 Coating material

Claims (5)

他のプレキャストコンクリート部材から突出している継手用の鉄筋を受け入れてその内部にグラウト等の固化材が注入可能な中空部を備えたプレキャストコンクリート部材の製造方法であって、
所望の寸法の中抜き構造を形成するための合成樹脂またはゴム製の中空部形成部材をプレキャストコンクリート部材成型用の型枠内に内挿し、該プレキャストコンクリート部材成型用の型枠内にコンクリートを打設し、コンクリートがある程度固化した段階で前記中空部形成部材を取り出すことを特徴とするプレキャストコンクリート部材の製造方法。 A method for producing a precast concrete member having a hollow portion capable of receiving a reinforcing bar for a joint projecting from another precast concrete member and injecting a solidifying material such as grout into the interior thereof,
A synthetic resin or rubber hollow part forming member for forming a hollow structure with a desired dimension is inserted into a mold for molding a precast concrete member, and concrete is cast into the mold for molding the precast concrete member. The method for producing a precast concrete member is characterized in that the hollow part forming member is taken out when the concrete is solidified to some extent. 前記中空部形成部材は表面にコッター状の凸凹を有す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の製造方法。   The method for producing a precast concrete member according to claim 1, wherein the hollow portion forming member has a cotter-like unevenness on a surface thereof. 前記中空部形成部材は、縦断面形状が逆台形等のアンカー機能を有する形状の発泡スチロール製であって、前記中空部形成部材をビニル等の被覆材で覆い、該被覆材にて覆われた前記中空部形成部材をプレキャストコンクリート部材成型用の型枠内に内挿し、該プレキャストコンクリート部材成型用の型枠内にコンクリートを打設し、コンクリートがある程度固化した段階で前記中空部形成部材を引き抜く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の製造方法。   The hollow part forming member is made of a polystyrene foam having an anchor function such as an inverted trapezoidal longitudinal cross-sectional shape, the hollow part forming member is covered with a covering material such as vinyl, and the covering material is covered with the covering material The hollow part forming member is inserted into a mold for molding a precast concrete member, the concrete is placed in the mold for molding the precast concrete member, and the hollow part forming member is pulled out when the concrete is solidified to some extent. The manufacturing method of the precast concrete member of Claim 1 characterized by these. 他のプレキャストコンクリート部材から突出している継手用の鉄筋を受け入れてその内部にグラウト等の固化材が注入可能な中空部を備えたプレキャストコンクリート部材の製造方法であって、
前記継手用の鉄筋を複数受け入れ可能な中空部の寸法を有する表面を粗面化した金属製またはコンクリート製の中抜き型枠部材をプレキャストコンクリート部材成型用の型枠内に配設し、該プレキャストコンクリート部材成型用の型枠内にコンクリートを打設し、前記中抜き型枠部材をコンクリート内に残置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製造方法。 A method for producing a precast concrete member having a hollow portion capable of receiving a reinforcing bar for a joint protruding from another precast concrete member and injecting a solidifying material such as grout into the interior thereof,
A metal or concrete hollow mold member with a roughened surface having dimensions of a hollow part capable of receiving a plurality of reinforcing bars for the joint is disposed in a mold for molding a precast concrete member. A method for producing a precast concrete member, wherein concrete is placed in a mold for molding a concrete member, and the hollow mold member is left in the concrete. 請求項１〜４のいずれかに記載の方法で製造されたプレキャストコンクリート部材を接合する方法であって、
第１のプレキャストコンクリート部材と第２のプレキャストコンクリート部材を現場にて建て込んで両方の接合面を対向させ、
該第１のプレキャストコンクリート部材から突出している複数の鉄筋を、前記第２のプレキャストコンクリート部材の中空部に挿入し、
該中空部にグラウト材を注入して一体化させるプレキャストコンクリート部材を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の接合方法。 A method for joining precast concrete members produced by the method according to claim 1,
The first precast concrete member and the second precast concrete member are built at the site so that both joint surfaces face each other,
Inserting a plurality of reinforcing bars protruding from the first precast concrete member into the hollow portion of the second precast concrete member;
A method for joining precast concrete members, comprising joining a precast concrete member for injecting and integrating a grout material into the hollow portion.
JP2004012396A 2004-01-20 2004-01-20 Precast concrete member manufacturing method and precast concrete member joining method Expired - Fee Related JP4453370B2 (en)

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