JP4176123B2 - Load-bearing material manufacturing method, load-bearing material and manufacturing apparatus used for the method - Google Patents

Load-bearing material manufacturing method, load-bearing material and manufacturing apparatus used for the method Download PDF

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JP4176123B2
JP4176123B2 JP2006308454A JP2006308454A JP4176123B2 JP 4176123 B2 JP4176123 B2 JP 4176123B2 JP 2006308454 A JP2006308454 A JP 2006308454A JP 2006308454 A JP2006308454 A JP 2006308454A JP 4176123 B2 JP4176123 B2 JP 4176123B2
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steel
steel pipe
load
bearing
filler
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JP2008121353A (en
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昭一 井上
智弘 藤井
陽一 西田
満明 山本
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Protec Engineering Inc
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本発明は、圧縮力や引張力を受ける構造物の支柱や梁材等に用いる耐荷材の製造方法と耐荷材及びその製造方法に用いる製造装置に関する。   TECHNICAL FIELD The present invention relates to a load-bearing material manufacturing method, a load-bearing material, and a manufacturing apparatus used for the manufacturing method, which are used for a column or beam of a structure that receives compressive force or tensile force.

従来、この種の防護構造物として、落石、雪崩防護構造物などでは、所定の間隔で支柱を設け、各支柱の間に水平ロープ材を設け、各支柱間を水平ロープ材に掛止させたワイヤ製のネットで遮蔽した防護柵（例えば特許文献１）や、各支柱間にコンクリート製や金属製などからなる横杆を多段に設けた防護柵や、斜面に所定の間隔を隔てて立設され、防護ネットを張り巡らす防護柵用支柱において、支柱の下端が斜面に載置され、斜面に設けたアンカーと前記支柱の下部の間が据付用ロープで接続されて位置決めされている支柱を用いる防護柵（例えば特許文献２）や、前記アンカーと支柱の上部及び下部との間を据付用ロープで接続した吊柵式の防護柵（例えば特許文献３）などが知られており、前記支柱には鋼管が用いられている。   Conventionally, as this type of protective structure, falling rocks, avalanche protective structures, etc., are provided with support posts at predetermined intervals, horizontal rope materials are provided between the support posts, and the horizontal rope materials are hooked between the support posts. Guard fences shielded by wire nets (for example, Patent Document 1), guard fences with multiple layers of concrete or metal between each support, or standing on a slope at a predetermined interval In the protective fence post that stretches around the protective net, a support post in which the lower end of the support is placed on the slope, and the anchor provided on the slope and the lower part of the support is connected by an installation rope is used. A guard fence (for example, Patent Document 2) and a suspension fence type guard fence (for example, Patent Document 3) in which the anchor and the upper and lower portions of the column are connected by an installation rope are known. Steel pipes are used.

また、斜面に形成した擁壁と、前記擁壁を貫通して地山に挿入し、擁壁から突出する部位を片持式に支持する主構部材と、前記擁壁から張り出た主構部材間に設けた床版とにより構成した防護構造物（例えば特許文献４）があり、前記主構造材には鋼管が用いられている。   In addition, a retaining wall formed on the slope, a main structural member that penetrates the retaining wall and is inserted into a natural ground, and supports a portion protruding from the retaining wall in a cantilever manner, and a main structural member that protrudes from the retaining wall There is a protective structure (for example, Patent Document 4) configured by a floor slab provided between members, and a steel pipe is used as the main structural material.

上記のように防護構造物の部材には、鋼管が用いられており、さらに、その鋼管の強度を増すため、内部にＰＣ鋼材を配置し、コンクリートを充填した充填鋼管（例えば特許文献５）が用いられている。   As described above, a steel pipe is used as a member of the protective structure. Further, in order to increase the strength of the steel pipe, a PC steel material is arranged inside and a filled steel pipe (for example, Patent Document 5) filled with concrete is used. It is used.

上記充填鋼管では、鋼管内の前側にＰＣ鋼材を配置することにより、鋼管の前側に加わる引張力に対抗することができる。   In the said filled steel pipe, the tensile force added to the front side of a steel pipe can be countered by arrange | positioning PC steel materials in the front side in a steel pipe.

しかし、構造材として用いる鋼管には、引張力以外にも圧縮力が加わる場合があり、従来のものでは、圧縮力に対抗する効果的な補強方法は開発されていなかった。   However, there is a case where a compressive force is applied to the steel pipe used as the structural material in addition to the tensile force, and an effective reinforcing method that counters the compressive force has not been developed in the conventional one.

このような問題を考慮して、特願２００６−１７０７３９号では、長さ方向に間隔を置いて前記鋼管に対をなす支圧部を設け、鋼棒からなる圧縮部材は、それら支圧部の間隔を広げる方向の弾性復元力を有する耐荷材の製造方法であって、前記鋼棒を長さ方向に圧縮し、この圧縮した圧縮部材の両端側を前記支圧部に定着する耐荷材の製造方法が提案されている。
特開平６−１７３２２１号公報 特開２０００−２４８５１５号公報（段落００１３段） 特開平８−１８４０１４号公報 特開２００１−３２３４１６号公報 実用新案登録第２５４７４９４号公報 In consideration of such a problem, in Japanese Patent Application No. 2006-170739, there is provided a bearing portion that is paired with the steel pipe at intervals in the length direction. A method of manufacturing a load-bearing material having an elastic restoring force in a direction in which the interval is widened, wherein the steel rod is compressed in the length direction, and both ends of the compressed compression member are fixed to the bearing portion. A method has been proposed.
JP-A-6-173221 JP 2000-248515 A (paragraph 0013) JP-A-8-184014 JP 2001-323416 A Utility Model Registration No. 2547494

上記耐荷材の製造方法では、圧縮した鋼棒の両端側を支圧部に定着することにより、鋼棒の弾性復元力が、支圧部間を広げる方向の力とした働き、鋼管の長さ方向に引張力を導入することができるが、鋼管に比べて細い鋼棒を圧縮するため、圧縮時に座屈が生じ易く、製造において鋼棒の座屈を確実に防止する必要がある。   In the manufacturing method of the load bearing material, by fixing both ends of the compressed steel rod to the bearing section, the elastic restoring force of the steel rod works as a force in the direction of expanding the bearing section, and the length of the steel pipe Tensile force can be introduced in the direction, but since a steel rod that is thinner than a steel pipe is compressed, buckling is likely to occur during compression, and it is necessary to reliably prevent buckling of the steel rod during manufacture.

ところで、鋼棒に引張力を導入する場合、鋼棒の一端を固定し、その鋼棒の他端を引張り、引張った状態で他端を定着することにより、鋼棒に緊張力を付与する方法が知られている。しかし、この方法が鋼棒を引張るのに対して、逆に鋼棒を圧縮する場合、鋼棒の一端を固定し、鋼棒の他端を押して該鋼棒を圧縮するには、鋼棒を真っ直ぐ押す必要があり、作業精度が求められることが予想される。   By the way, when a tensile force is introduced into a steel rod, a method of applying tension to the steel rod by fixing one end of the steel rod, pulling the other end of the steel rod, and fixing the other end in the tensioned state. It has been known. However, when this method pulls the steel rod, but compresses the steel rod conversely, to fix the steel rod by fixing one end of the steel rod and pressing the other end of the steel rod, It is necessary to push straight, and it is expected that work accuracy will be required.

そこで、本発明は、圧縮時の圧縮部材の座屈を防止できる耐荷材の製造方法と耐荷材及びその製造方法に用いる製造装置を提供することを目的とし、また、圧縮部材の圧縮作業を効率よく行うことを目的とし、さらに、強度的に優れた耐荷材を提供することを目的とする。   Therefore, an object of the present invention is to provide a load-bearing material manufacturing method capable of preventing buckling of the compression member during compression, the load-bearing material, and a manufacturing apparatus used for the manufacturing method, and to efficiently compress the compression member. It aims at performing well, and also aims at providing the load-bearing material excellent in strength.

請求項１の発明は、鋼管内に配置された圧縮部材に圧縮力を加え、前記圧縮部材の伸長方向の弾性復元力により該鋼管の長さ方向に引張力を加える耐荷材の製造方法において、前記圧縮部材がアンボンド式のＰＣ鋼材であり、前記鋼管内の断面に部分的に充填材を充填して該充填材により前記ＰＣ鋼材を拘束した後、前記ＰＣ鋼材に圧縮力を加え、前記ＰＣ鋼材により前記鋼管の長さ方向に前記引張力を加えた後、前記鋼管内にセメント系充填材を充填する製造方法である。 The invention of claim 1, a compressive force to the compression member disposed in the steel tube was added, in the manufacturing method of the load bearing material applying a tensile force in the length direction of the steel pipe by the elastic restoring force of the extending direction of said compression member, The compression member is an unbonded PC steel material. After the filler is partially filled in the cross section in the steel pipe and the PC steel material is restrained by the filler, a compression force is applied to the PC steel material , and the PC In the manufacturing method, the tensile force is applied in the length direction of the steel pipe by a steel material, and then the cement-based filler is filled in the steel pipe .

また、請求項２の発明は、前記鋼管の断面一側に前記ＰＣ鋼材を配置し、前記鋼管の断面他側に引張部材により圧縮力を付与する製造方法である。   Moreover, invention of Claim 2 is a manufacturing method which arrange | positions the said PC steel materials to the cross-sectional one side of the said steel pipe, and provides compressive force with a tension member to the cross-sectional other side of the said steel pipe.

また、請求項３の発明は、長さ方向に間隔を置いて前記鋼管に対をなす支圧部を設け、前記ＰＣ鋼材は、それら支圧部の間隔を広げる方向の弾性復元力を有する製造方法である。   Further, the invention of claim 3 is provided with a supporting pressure part that forms a pair with the steel pipe at intervals in the lengthwise direction, and the PC steel material has an elastic restoring force in a direction to widen the interval between the supporting pressure parts. Is the method.

また、請求項４の発明は、前記支圧部の間に前記鋼管より小径な管体を配置し、この管体に前記ＰＣ鋼材を挿通すると共に前記管体内に前記充填材を充填して該充填材により該ＰＣ鋼材を拘束する製造方法である。   According to a fourth aspect of the present invention, a pipe body having a diameter smaller than that of the steel pipe is disposed between the bearing portions, the PC steel material is inserted into the pipe body, and the filler is filled in the pipe body. In this manufacturing method, the PC steel material is restrained by a filler.

また、請求項１の発明は、前記鋼管の長さ方向に引張力を加えた後、前記鋼管内にセメント系充填材を充填する製造方法である。 Moreover, invention of Claim 1 is a manufacturing method which fills the said steel pipe with a cement-type filler after applying tensile force to the length direction of the said steel pipe.

また、請求項５の発明は、伸縮手段の伸長により前記ＰＣ鋼材の端部を内側に押すと共に、前記伸長により前記鋼管を外側に引張って前記ＰＣ鋼棒に前記圧縮力を加える製造方法である。 The invention of claim 5, together with the pushing at the end of the PC steel inside the extension of the telescopic unit, the steel pipe pulling outwardly by said extension applying said compressive force to the PC steel bars is the production method .

また、請求項６の発明は、請求項１〜５のいずれか１項に記載の耐荷材の製造方法により製造されたものである。 The invention according to claim 6 is manufactured by the method for manufacturing a load-bearing material according to any one of claims 1 to 5 .

また、請求項７の発明は、請求項１〜４のいずれか１項に記載の耐荷材の製造方法に用いる耐荷材の製造装置において、前記ＰＣ鋼材の端部側に配置され伸長動作により前記ＰＣ鋼材を内側に押して前記圧縮力を加える伸縮手段と、この伸縮手段の伸長動作により前記鋼管を外側に引張る引張手段とを備えるものである。 The invention of claim 7 is the load-bearing material manufacturing apparatus used in the load-bearing material manufacturing method according to any one of claims 1 to 4 , and is arranged on an end side of the PC steel material, and is extended by an extension operation. An expansion / contraction means that pushes the PC steel material inward and applies the compressive force, and a tension means that pulls the steel pipe outward by an extension operation of the expansion / contraction means.

請求項１の構成によれば、アンボンド式のＰＣ鋼材を充填材により拘束することにより、座屈が発生することなく、ＰＣ鋼材を圧縮することができる。また、圧縮後、ＰＣ鋼材の弾性復元力により鋼管に引張力が導入され、鋼管に伸びを与えることができる。この場合、鋼管には充填材が部分的に設けられているから、鋼管全体に充填材を設けた場合に比べて大きな伸びを得ることができる
このように製造することにより、曲げモーメントによって鋼管に長さ方向の圧縮力が加わると、この圧縮力に対して圧縮部材の引張力が対抗することにより、荷重に強い耐荷材が得られる。 According to the configuration of the first aspect, the PC steel material can be compressed without causing buckling by restraining the unbonded PC steel material with the filler. In addition, after compression, a tensile force is introduced into the steel pipe by the elastic restoring force of the PC steel material, and the steel pipe can be stretched. In this case, since the steel pipe is partially provided with a filler, it is possible to obtain a large elongation compared to the case where the entire steel pipe is provided with the filler. When a compressive force in the length direction is applied, the tensile force of the compressing member opposes this compressive force, thereby obtaining a load-resistant material that is resistant to loads.

また、請求項２の構成によれば、さらに、曲げモーメントによって鋼管に長さ方向の引張力が加わると、この引張力に対して引張部材の圧縮力が対抗することにより、荷重に強い耐荷材が得られる。   Further, according to the configuration of claim 2, when a tensile force in the length direction is further applied to the steel pipe by a bending moment, the compressive force of the tensile member opposes this tensile force. Is obtained.

また、請求項３の構成によれば、支圧部間を広げるＰＣ鋼材の弾性復元力により鋼管の長さ方向に引張力を加えることができる。   Moreover, according to the structure of Claim 3, tensile force can be added to the length direction of a steel pipe with the elastic restoring force of PC steel materials which spreads between the bearing parts.

また、請求項４の構成によれば、鋼管に配置された管体にＰＣ鋼材を挿通することにより、ＰＣ鋼材を略真っ直ぐに位置決めすることができ、ＰＣ鋼材を拘束する充填材とその外側の管体により、圧縮時におけるＰＣ鋼材の座屈を防止することができる。   Moreover, according to the structure of Claim 4, by inserting PC steel material in the pipe body arrange | positioned at the steel pipe, PC steel material can be positioned substantially straightly, the filler which restrains PC steel material, and its outer side The tubular body can prevent buckling of the PC steel during compression.

また、請求項１の構成によれば、セメント系充填材の充填後に引張力を導入するには、鋼管及び充填材の断面積が大きくなり、大きな導入力が必要となり、製造が困難となるが、セメント系充填材の充填前に鋼管に引張力を加えることにより、大きな引張力を加えることができ、得られた耐荷材の弾性領域が広がる。 Moreover, according to the structure of Claim 1 , in order to introduce | transduce a tensile force after filling with a cement-type filler, the cross-sectional area of a steel pipe and a filler becomes large, and big introduction force is required, but manufacture becomes difficult. By applying a tensile force to the steel pipe before filling with the cement-based filler, a large tensile force can be applied, and the elastic region of the obtained load-bearing material is expanded.

また、請求項５の構成によれば、ＰＣ鋼材の端部を内側に押すと共に、これとは逆方向の外側に鋼管を引張ってＰＣ鋼棒に前記圧縮力を加えるため、セットロスが小さく、有効プレストレスを大きくできるので、効率よくＰＣ鋼材を圧縮することができる。 Moreover, according to the structure of Claim 5 , while pushing the edge part of PC steel material inside, pulling a steel pipe to the outer side of the opposite direction to this, and applying the said compression force to a PC steel rod, set loss is small, Since the effective prestress can be increased, the PC steel can be efficiently compressed.

また、請求項６の構成によれば、弾性領域が大きな耐荷材となる。 Moreover, according to the structure of Claim 6 , it becomes a load-bearing material with a large elastic area | region.

また、請求項７の構成によれば、伸縮手段を伸長すると、ＰＣ鋼材を内側に押す力が加わり、同時にその反力により鋼管を外側に引く力が加わるため、セットロスが小さく、有効プレストレスを大きくできるので、伸縮手段の動作により効率よくＰＣ鋼材を圧縮することができる。 According to the configuration of claim 7 , when the expansion / contraction means is extended, a force that pushes the PC steel material inward is applied, and simultaneously, a force that pulls the steel pipe outward by the reaction force is applied. Therefore, the PC steel can be efficiently compressed by the operation of the expansion / contraction means.

本発明における好適な実施の形態について、添付図面を参照しながら詳細に説明する。尚、以下に説明する実施の形態は、特許請求の範囲に記載された本発明の内容を限定するものではない。また、以下に説明される構成の全てが、本発明の必須要件であるとは限らない。各実施例では、従来とは異なる新規な耐荷材の製造方法と耐荷材及びその製造方法に用いる製造装置を採用することにより、従来にない耐荷材が得られ、その耐荷材について記述する。   Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention. In each of the embodiments, a new load-bearing material manufacturing method, a load-bearing material, and a manufacturing apparatus used for the manufacturing method, which are different from conventional ones, are employed, and an unprecedented load-bearing material is obtained, and the load-bearing material is described.

以下、本発明の実施例１について、図１〜図１１を参照して説明する。同図に示すように、耐荷材１は、鋼管２と、この鋼管２の長さ方向に引張力を加える圧縮部材たるアンボンド式のＰＣ鋼棒３とを備える。また、前記鋼管２の両端部に、それぞれ支圧部たる支圧板４，４´を設け、これら支圧板４，４´は、鋼管２の直径方向の板材からなり、溶接などにより鋼管２の内周面の一側に固着されている。それら支圧板４，４´は、その幅方向両側に、補強リブ５，５を有し、断面略コ字形をなし、その長さ方向両端側に鋼管２の内周面に対応する円弧部６，６を有し、この円弧部６と前記補強リブ５の縁部を鋼管２の内周面に溶接などにより固着している。そして、前記ＰＣ鋼棒３を長さ方向に圧縮した状態で、該鋼棒３の両端側を前記支圧板４，４に定着し、鋼管１に長さ方向の引張力を導入する。その支圧板４，４には、鋼管２の断面一側に位置して、前記ＰＣ鋼棒３を挿通する挿通孔７，７´が穿設されている。また、前記支圧板４，４には、前記鋼管２の断面他側に位置して、引張部材たるＰＣ鋼材８を挿通する挿通孔７Ａ，７Ａ´が穿設されている。尚、一側の支圧板４´の挿通孔７´，７Ａ´より他側の支圧板４の挿通孔７，７Ａは大きく形成されている。   Hereinafter, Example 1 of the present invention will be described with reference to FIGS. As shown in FIG. 1, the load bearing material 1 includes a steel pipe 2 and an unbonded PC steel rod 3 as a compression member that applies a tensile force in the length direction of the steel pipe 2. Further, bearing plates 4 and 4 ', which are bearing portions, are provided at both ends of the steel pipe 2, respectively. These bearing plates 4 and 4' are made of a plate material in the diametrical direction of the steel pipe 2, and are welded to the inside of the steel pipe 2 by welding. It is fixed to one side of the peripheral surface. These bearing plates 4, 4 ′ have reinforcing ribs 5, 5 on both sides in the width direction, have a substantially U-shaped cross section, and arc portions 6 corresponding to the inner peripheral surface of the steel pipe 2 at both ends in the length direction. , 6 and the arc portion 6 and the edge of the reinforcing rib 5 are fixed to the inner peripheral surface of the steel pipe 2 by welding or the like. Then, in a state where the PC steel bar 3 is compressed in the length direction, both end sides of the steel bar 3 are fixed to the bearing plates 4, 4, and a tensile force in the length direction is introduced into the steel pipe 1. The bearing plates 4, 4 are provided with insertion holes 7, 7 ′ through which the PC steel rod 3 is inserted, located on one side of the cross section of the steel pipe 2. The bearing plates 4 and 4 are provided with insertion holes 7A and 7A 'through which the PC steel material 8 as a tensile member is inserted, located on the other side of the cross section of the steel pipe 2. The insertion holes 7 and 7A of the other side pressure plate 4 are formed larger than the insertion holes 7 'and 7A' of the one side pressure plate 4 '.

前記鋼棒３は内装体11により前記鋼管２内に配置され、その内装体11は、対をなす管体たる鞘管12，12Ａと、長さ方向に間隔をおいて設けた複数の管体用スペーサ13，13…とからなる。前記対をなす鞘管12，12Ａは、鋼管２内の対向する位置で、鋼管２の内面に近い位置にあり、前記スペーサ13は、前記鋼管２に円板状をなし、前記鞘管12を挿通する挿通孔14を備え、この挿通孔14において鞘管12を固定している。また、前記スペーサ13には、鞘管12，12Ａの間で、その円周に切欠き溝15，15が形成され、後述するセメント系充填材が前記切欠き溝15を通る。尚、前記ＰＣ鋼棒３を挿通する鞘管12は、両側の支圧板４，４の間隔より短く、その端部と支圧板４との間に間隔が設けられている。   The steel bar 3 is disposed in the steel pipe 2 by an inner body 11, and the inner body 11 includes a plurality of pipe bodies provided at intervals in the length direction from the sheath pipes 12 and 12A which are paired pipe bodies. Spacers 13, 13. The pair of sheathed pipes 12 and 12A are opposed to each other in the steel pipe 2 and are located close to the inner surface of the steel pipe 2, and the spacer 13 is formed in a disk shape on the steel pipe 2 so that the sheath pipe 12 is formed. An insertion hole 14 for insertion is provided, and the sheath tube 12 is fixed in the insertion hole 14. Further, the spacer 13 is formed with notches 15 and 15 on the circumference between the sheath tubes 12 and 12A, and a cement-based filler to be described later passes through the notch 15. The sheath tube 12 through which the PC steel rod 3 is inserted is shorter than the interval between the pressure-bearing plates 4 and 4 on both sides, and a space is provided between the end portion and the pressure-bearing plate 4.

前記鞘管12の内径は、例えば７０ｍｍ程度であり、前記ＰＣ鋼棒３の外径は、３６ｍｍ程度であり、鞘管12の内周には、該鞘管12の長さ方向に所定間隔を置いて複数のスペーサ16が設けられている。このスペーサ16は、図６に示すように、前記鞘管12の内周に複数の円弧板17，17，17を設け、これら円弧板17，17，17の内端17Ａ，17Ａ，17Ａを通る仮想円の直径が前記ＰＣ鋼棒３の外径に略対応し、実際には、前記仮想円の直径をＰＣ鋼棒３の外径より僅かに大きく設定している。そして、ＰＣ鋼棒３を挿通した状態で、前記内端17Ａ，17Ａ間には隙間があり、ここを後述した充填材が通ることができる。   The inner diameter of the sheath tube 12 is, for example, about 70 mm, the outer diameter of the PC steel rod 3 is about 36 mm, and a predetermined interval is provided in the longitudinal direction of the sheath tube 12 on the inner periphery of the sheath tube 12. A plurality of spacers 16 are provided. As shown in FIG. 6, the spacer 16 is provided with a plurality of arc plates 17, 17, 17 on the inner periphery of the sheath tube 12, and passes through inner ends 17A, 17A, 17A of the arc plates 17, 17, 17. The diameter of the virtual circle substantially corresponds to the outer diameter of the PC steel rod 3, and actually the diameter of the virtual circle is set slightly larger than the outer diameter of the PC steel rod 3. And in the state which inserted the PC steel rod 3, there exists a clearance gap between the said inner ends 17A and 17A, The filler mentioned later can pass here.

前記ＰＣ鋼棒３の両端には、雌螺子部18がそれぞれ形成され、この雌螺子部18にナット体19，19Ａが螺合し、これらナット体19，19Ａは支圧板４を挟んだ外側と内側に螺合される。尚、ナット体19Ａと支圧板４，４´との間にはアンカープレート30が配置される。   Female screw portions 18 are formed at both ends of the PC steel rod 3, and nut bodies 19 and 19A are screwed into the female screw portions 18, respectively. Screwed inside. An anchor plate 30 is disposed between the nut body 19A and the supporting pressure plates 4 and 4 '.

次に、前記圧縮部材たるＰＣ鋼棒３を長さ方向に圧縮する方法について説明する。一方の前記支圧板４には、鋼管２の断面一側に、張出し縁部４Ａ，４Ａを一体に形成し、これら張出し縁部４Ａ，４Ａに、連結孔20，20を穿設する。製造装置21は、伸縮手段たるジャッキ22を備え、このジャッキ22は油圧などの流体圧により伸縮し、基端側の本体23と、この本体23に対して進退する伸縮部24とを有し、この伸縮部24の進退によりジャッキ22が伸縮する。また、前記本体23の基端側には、ジャッキ22の伸長時に本体23から反力を受ける枠体25を設け、この枠体25に連結部たる一対の連結杆26，26を設けて支圧板４と枠体25とを連結し、それら連結杆26，26はジャッキ22を挟んだ両側に位置し、それら連結杆26，26の先端を前記連結孔20，20に挿入し、その先端の螺子部にナット27を螺合して連結し、それら連結杆26，26の先端を枠体25に挿入し、その先端の螺子部にナット27Ａを螺合して連結している。また、前記伸縮部24の先端には、前記ＰＣ鋼棒３の端部を挿入する挿入孔28が設けられており、前記伸縮部24に当接する位置で前記ＰＣ鋼棒３の雄螺子部18に押圧用ナット29を螺合する。   Next, a method for compressing the PC steel rod 3 as the compression member in the length direction will be described. On one side of the support plate 4, overhanging edges 4A, 4A are integrally formed on one side of the cross section of the steel pipe 2, and connection holes 20, 20 are formed in these overhanging edges 4A, 4A. The manufacturing apparatus 21 includes a jack 22 that is an expansion / contraction means, and the jack 22 is expanded and contracted by a fluid pressure such as hydraulic pressure, and includes a base body 23 and an expansion / contraction portion 24 that moves forward and backward with respect to the main body 23. The jack 22 expands and contracts due to the expansion / contraction of the expansion / contraction part 24. Further, on the base end side of the main body 23, a frame body 25 that receives a reaction force from the main body 23 when the jack 22 is extended is provided, and a pair of connecting rods 26 and 26 that are connecting portions to the frame body 25 are provided to provide a bearing plate. 4 and the frame 25 are connected, and the connecting rods 26 and 26 are located on both sides of the jack 22, and the tips of the connecting rods 26 and 26 are inserted into the connecting holes 20 and 20, and the screw at the tip is inserted. A nut 27 is screwed and connected to the portion, the tips of the connecting rods 26 and 26 are inserted into the frame 25, and a nut 27A is screwed and connected to the screw portion at the tip. An insertion hole 28 for inserting the end of the PC steel rod 3 is provided at the tip of the expansion / contraction part 24, and the male screw part 18 of the PC steel bar 3 is in a position where it abuts on the expansion / contraction part 24. The pressing nut 29 is screwed onto the screw.

まず、鋼管２内に内装体11を挿入した後、鋼管２の両側に支圧板４，４´を固定する。この場合、内装体11を鋼管２内面に固定してもよいし、あるいは固定しなくてもよいが、支圧板４，４´の挿通孔７，７Ａ，７´，７Ａ´と内装体11の鞘管12，12Ａとの位置を合せておく。   First, after the inner body 11 is inserted into the steel pipe 2, the bearing plates 4 and 4 ′ are fixed to both sides of the steel pipe 2. In this case, the inner body 11 may or may not be fixed to the inner surface of the steel pipe 2, but the insertion holes 7, 7 A, 7 ′, 7 A ′ of the bearing plates 4, 4 ′ and the inner body 11 Align the position with the sheath tube 12, 12A.

まず、鋼管２の長さ方向他側（図１中で右側）の挿通孔７´から、ＰＣ鋼棒３を鞘管12内に挿入し、この鞘管12の長さ方向一側から出たＰＣ鋼棒３の端部たる一端３Ａに、鞘管12と支圧板４との間で、ナット体19Ａを螺合し、このナット体19Ａを回しながら鋼棒３の一端３Ａを長さ方向一端側の挿通孔５から外側に所定長さだけ突出させて、鋼棒３の端部たる他端３Ｂが挿通孔７´を挿通したら（挿通孔７´より内側に移動したら）、その他端３Ｂに支圧板４´と鞘管12との間でナット体19Ａを螺合し、さらに、ナット体19Ａを回しながら、他端３Ｂが支圧板４の外側に突出するように配置し、その他端３Ｂにナット体19を螺合し、これにより、ＰＣ鋼棒３の他端３Ｂをナット体19，19Ａにより他端側の支圧板４´に固定する。尚、ＰＣ鋼棒３の一端３Ａも一側の支圧板４の外側に突出し、ナット体19，19Ａは、支圧板４と離れた位置で、雄螺子部18に螺合しておく。このようにして鞘管12内にＰＣ鋼棒３を挿通したら、鞘管12内に、無収縮モルタルやセメントミルクなどの充填材31を充填し、充填材31が硬化した後、ＰＣ鋼棒３に圧縮力を加える。この場合、スペーサ16は、内端17Ａ，17Ａ，17Ａの３点でＰＣ鋼棒３を位置決めしており、鞘管12内でＰＣ鋼棒３が真っ直ぐに配置され、また、充填材31は、隣り合う円弧板17，17とＰＣ鋼棒３の外周との間の隙間を通し鞘管12の全長に充填され、ＰＣ鋼棒３の略全周で略全長が充填材31により覆われる。   First, the PC steel rod 3 was inserted into the sheath tube 12 from the insertion hole 7 ′ on the other side in the length direction of the steel tube 2 (right side in FIG. 1), and exited from one side in the length direction of the sheath tube 12. A nut body 19A is screwed between one end 3A, which is the end of the PC steel bar 3, between the sheath tube 12 and the bearing plate 4, and one end 3A of the steel bar 3 is connected to one end in the longitudinal direction while turning the nut body 19A. When the other end 3B, which is the end of the steel bar 3, is inserted through the insertion hole 7 '(moved inward from the insertion hole 7') by projecting outward by a predetermined length from the insertion hole 5 on the side, the other end 3B The nut body 19A is screwed between the bearing plate 4 ′ and the sheath tube 12, and the other end 3B is arranged so as to protrude outside the bearing plate 4 while rotating the nut body 19A. The nut body 19 is screwed so that the other end 3B of the PC steel rod 3 is fixed to the bearing plate 4 'on the other end side by the nut bodies 19 and 19A. Note that one end 3A of the PC steel rod 3 also protrudes to the outside of the one side bearing plate 4, and the nut bodies 19 and 19A are screwed into the male screw portion 18 at positions away from the bearing plate 4. After inserting the PC steel rod 3 into the sheath tube 12 in this way, the sheath tube 12 is filled with a filler 31 such as non-shrink mortar or cement milk, and after the filler 31 has hardened, the PC steel rod 3 Apply compressive force to In this case, the spacer 16 positions the PC steel rod 3 at three points of the inner ends 17A, 17A, and 17A, the PC steel rod 3 is disposed straight in the sheath tube 12, and the filler 31 is The entire length of the sheath tube 12 is filled through the gap between the adjacent circular arc plates 17 and 17 and the outer periphery of the PC steel rod 3, and substantially the entire length of the PC steel rod 3 is covered with the filler 31.

図７〜図８に示すように、ＰＣ鋼棒３に圧縮力を加える前に、前記伸縮部24に当接する位置で、前記ＰＣ鋼棒３の一端３Ａの雄螺子部18に押圧用ナット29を螺合し、ＰＣ鋼棒３の端部を前記挿入孔28に挿入し、伸縮部24に押圧ナット29を当接する。この状態で、連結杆26，26の先端を前記連結孔20，20に挿入し、その先端の螺子部18にナット27を螺合して連結する。尚、図８に示すように、ナット体19を支圧板４から離れた位置にして、ＰＣ鋼棒３を押し込み可能にしておく。   As shown in FIGS. 7 to 8, before applying a compressive force to the PC steel bar 3, a pressing nut 29 is applied to the male screw part 18 of the one end 3 </ b> A of the PC steel bar 3 at a position where it abuts on the expansion / contraction part 24. And the end of the PC steel rod 3 is inserted into the insertion hole 28, and the pressing nut 29 is brought into contact with the expansion / contraction part 24. In this state, the ends of the connecting rods 26 and 26 are inserted into the connecting holes 20 and 20, and the nuts 27 are screwed into the screw portions 18 at the ends of the connecting holes and connected. As shown in FIG. 8, the nut body 19 is positioned away from the bearing plate 4 so that the PC steel rod 3 can be pushed in.

そして、鋼管２内の充填材31が硬化した後、ジャッキ22を駆動して伸縮部24を伸長すると、図８の白抜き矢印に示すように、伸縮部24により押圧用ナット29が押されてＰＣ鋼棒３を長さ方向に圧縮する力が加わり、同時に伸縮部24の伸長により支圧板４と枠体25との間を広げようとする力が発生し、黒塗り矢印に示すように、枠体25に連結杆26，26によって連結された支圧板４が外側に引張られることにより、セットロスが少なく、ＰＣ鋼棒３を効率よく圧縮することができる。尚、この例では、ＰＣ鋼棒３の一端３Ａ側に製造装置21を配置したが、同時にＰＣ鋼棒３の他端３Ｂ側に製造装置21を配置し、両側の製造装置21，21により、略同時にＰＣ鋼棒３を圧縮するようにしてもよい。   Then, after the filler 31 in the steel pipe 2 is hardened, when the jack 22 is driven to extend the expansion / contraction part 24, the pressing nut 29 is pushed by the expansion / contraction part 24 as shown by the white arrow in FIG. A force to compress the PC steel bar 3 in the length direction is applied, and at the same time, a force to expand the support plate 4 and the frame body 25 is generated by the extension of the expansion / contraction part 24. As shown by the black arrow, Since the bearing plate 4 connected to the frame 25 by the connecting rods 26 and 26 is pulled outward, the set loss is small and the PC steel rod 3 can be efficiently compressed. In this example, the manufacturing apparatus 21 is arranged on the one end 3A side of the PC steel bar 3, but at the same time, the manufacturing apparatus 21 is arranged on the other end 3B side of the PC steel bar 3, and the manufacturing apparatuses 21 and 21 on both sides are used. You may make it compress the PC steel bar 3 substantially simultaneously.

この場合、ＰＣ鋼棒３は、スペーサ16，16…により真っ直ぐに配置され、且つ、ＰＣ鋼棒３と管体12との間に充填した充填材31により拘束されているため、座屈を生じることなく、ＰＣ鋼棒３を圧縮することができる。そして、ＰＣ鋼棒３を長さ方向に所定寸法だけ圧縮したら、この状態で、他端側のナット体19，19Ａを支圧板４に当接する位置まで回して止め、この後、ジャッキ22を収縮し、連結杆26からナット27を外して連結杆26と支圧板４との連結を解除し、ＰＣ鋼棒３の端部からジャッキ22を取外す。ジャッキ22を収縮すると、ＰＣ鋼棒３の伸長方向の弾性復元力により両側のナット体ナット体19Ａ，19Ａにより両側の支圧板４，４´を広げようとする力が発生し、鋼管２の断面一側を長さ方向に伸ばす引張力を導入することができる。   In this case, the PC steel rod 3 is arranged straight by the spacers 16, 16... And is restrained by the filler 31 filled between the PC steel rod 3 and the pipe body 12, so that buckling occurs. The PC steel bar 3 can be compressed without any problem. When the PC steel bar 3 is compressed by a predetermined dimension in the length direction, in this state, the nut bodies 19 and 19A on the other end side are turned to a position where they abut against the bearing plate 4, and then the jack 22 is contracted. Then, the nut 27 is removed from the connecting rod 26 to release the connection between the connecting rod 26 and the bearing plate 4, and the jack 22 is removed from the end of the PC steel rod 3. When the jack 22 is contracted, the elastic restoring force in the extending direction of the PC steel rod 3 generates a force for spreading the bearing plates 4 and 4 'on both sides by the nut bodies 19A and 19A on both sides, and the cross section of the steel pipe 2 A tensile force can be introduced that stretches one side in the length direction.

一方、他方の鞘管12Ａに支圧板４の挿通７Ａから引張部材たるＰＣ鋼材８を挿入し、このＰＣ鋼材８の両端側を外側に引張る引張力を加えて緊張した状態で、それら両端側を定着具32，32により定着し、定着後、前記引張力を解放することにより、支圧板４，４間に圧縮力を付与する。この場合、前記ＰＣ鋼棒３による引張力と前記ＰＣ鋼材８による圧縮力とが釣り合うように設定することにより、鋼管２に加わる軸方向の力を±０にすることができる。尚、定着具32と支圧板４，４´との間にはアンカープレート30が配置される。   On the other hand, the PC steel material 8 which is a tensile member is inserted into the other sheath tube 12A from the insertion 7A of the bearing plate 4 and the both ends of the PC steel material 8 are stretched by applying a tensile force that pulls both ends outward. Fixing is performed by the fixing devices 32 and 32, and after the fixing, a compressive force is applied between the supporting plates 4 and 4 by releasing the tensile force. In this case, the axial force applied to the steel pipe 2 can be set to ± 0 by setting so that the tensile force by the PC steel bar 3 and the compressive force by the PC steel material 8 are balanced. An anchor plate 30 is disposed between the fixing tool 32 and the pressure plate 4, 4 '.

前記ＰＣ鋼材８は、ＰＣ鋼棒やＰＣ鋼線からなり、前記ＰＣ鋼材８がＰＣ鋼棒であれば、定着具たるナット体をＰＣ鋼棒の両端側に螺合し、前記ＰＣ鋼材８がＰＣ鋼線であれば、楔式の定着具を用いることができる。   The PC steel material 8 is made of a PC steel rod or a PC steel wire. If the PC steel material 8 is a PC steel rod, a nut body as a fixing tool is screwed to both ends of the PC steel rod, and the PC steel material 8 is If it is a PC steel wire, a wedge-type fixing tool can be used.

上述したように、ＰＣ鋼棒３により断面一側に引張力を導入し、ＰＣ鋼材８により断面他側に圧縮力を導入した後、さらに、前記鋼管２内にセメント系充填材33を充填することができる。そのセメント系充填材33として、コンクリートが例示される。このようにコンクリート充填前に、鋼管２に引張力と圧縮力を導入することにより、耐荷材１の弾性領域が広がる。また、図１０に示すように、鋼管２の両端側の管用スペーサ13と鋼管２の管端との間には、防蝕用充填材たる無収縮セメントミルク33Ａを充填し、定着部たるＰＣ鋼棒２の両端，ＰＣ鋼材の両端，ナット体19，19Ａ及び定着具32の防蝕を図る。尚、両端側の管用スペーサ13，13間においては、鋼管２内に前記セメント系充填材33を充填する。   As described above, after introducing a tensile force on one side of the cross section by the PC steel rod 3 and a compressive force on the other side of the cross section by the PC steel material 8, the steel pipe 2 is further filled with the cement filler 33. be able to. Concrete is exemplified as the cement-based filler 33. Thus, by introducing a tensile force and a compressive force to the steel pipe 2 before filling the concrete, the elastic region of the load bearing material 1 is expanded. Further, as shown in FIG. 10, between the pipe spacers 13 on both ends of the steel pipe 2 and the pipe ends of the steel pipe 2, non-shrinkage cement milk 33A, which is a corrosion-proof filler, is filled, and a PC steel rod as a fixing portion Corrosion-proofing of both ends of 2, both ends of the PC steel material, nut bodies 19, 19 </ b> A and fixing tool 32 is attempted. Note that the cement filler 33 is filled in the steel pipe 2 between the pipe spacers 13 on both ends.

以下、試験例について説明する。試験に用いた鋼管２は、一般構造用炭素鋼鋼管で、外径457.2mm，厚さ12.7mmである。試験に用いたＰＣ鋼棒３は、SBPR 930/1080（耐力930Ｎ/mm2以上，引張強さ：1030Ｎ/mm2以上）、直径36mmのアンポンド式ＰＣ鋼棒である。試験に用いたＰＣ鋼材８は、SBPR 930/1080（耐力930Ｎ/mm2以上，引張強さ：1030Ｎ/mm2以上）、直径36mmのＰＣ鋼棒である。試験に用いた鞘管12，12Ａの中心間隔は、300mmであり、この中央に鋼管２の中心が位置する。試験品（Ａ）は、前記鋼管２である。試験品（Ｂ）は、鋼管２内にコンクリートを充填したものである。試験品（Ｃ）は、鋼管２内にコンクリートを充填し、ＰＣ鋼棒３とＰＣ鋼材８を挿通し、鋼管２にＰＣ鋼棒３により引張力を導入せず、鋼管２にＰＣ鋼材８により圧縮力を導入していないものである。試験品（Ｄ）は、鋼管２にＰＣ鋼棒３により引張力を導入し、鋼管２にＰＣ鋼材８により圧縮力を導入したものである。試験品（Ｅ）は、鋼管２にＰＣ鋼棒３により引張力を導入し、鋼管２にＰＣ鋼材８により圧縮力を導入し、コンクリートを充填したものである。尚、ＰＣ鋼棒３により鋼管２に引張力を導入する際、該ＰＣ鋼棒３を500ｋＮの圧縮力を加え、ＰＣ鋼材８により鋼管２に引張力を導入する際、該ＰＣ鋼材３に500ｋＮの引張力を加えた。 Hereinafter, test examples will be described. The steel pipe 2 used for the test is a general structural carbon steel pipe having an outer diameter of 457.2 mm and a thickness of 12.7 mm. PC steel rod 3 used in the test, SBPR 930/1080 (proof stress 930N / mm 2 or more, tensile strength: 1030N / mm 2 or higher), a Anpondo type PC steel rod having a diameter of 36 mm. The PC steel material 8 used for the test is a SBPR 930/1080 (yield strength of 930 N / mm 2 or more, tensile strength: 1030 N / mm 2 or more) and a 36 mm diameter PC steel bar. The center interval between the sheath tubes 12 and 12A used in the test is 300 mm, and the center of the steel tube 2 is located at the center. The test product (A) is the steel pipe 2. The test product (B) is a steel tube 2 filled with concrete. In the test product (C), the steel pipe 2 is filled with concrete, the PC steel bar 3 and the PC steel material 8 are inserted, the tensile force is not introduced into the steel pipe 2 by the PC steel bar 3, and the steel pipe 2 is made of the PC steel material 8. The compression force is not introduced. In the test product (D), a tensile force is introduced into the steel pipe 2 by the PC steel rod 3, and a compressive force is introduced into the steel pipe 2 by the PC steel material 8. In the test product (E), a tensile force is introduced into the steel pipe 2 by the PC steel rod 3, a compressive force is introduced into the steel pipe 2 by the PC steel material 8, and concrete is filled. When a tensile force is introduced into the steel pipe 2 by the PC steel bar 3, a compressive force of 500 kN is applied to the PC steel bar 3, and when a tensile force is introduced into the steel pipe 2 by the PC steel material 8, 500 kN is applied to the PC steel material 3. The tensile force of was applied.

上記試験品（Ａ）〜（Ｅ）のモーメントＭと曲率φの関係を実験より求めた結果を図１２に示す。また、それぞれの降伏モーメントを下記の表１に示す。   FIG. 12 shows the results obtained by experiments regarding the relationship between the moment M and the curvature φ of the test products (A) to (E). Further, each yield moment is shown in Table 1 below.

Figure 0004176123
上記の表１に示されるように、鋼管２にＰＣ鋼棒３により引張力を導入し、鋼管２にＰＣ鋼材８により圧縮力を導入し、コンクリートを充填した試験品（Ｅ）は他に比べて極めて高い降伏モーメントの値を得ることができ、耐力に優れることが分かる。
Figure 0004176123
 As shown in Table 1 above, the specimen (E) in which the tensile force is introduced into the steel pipe 2 by the PC steel rod 3, the compressive force is introduced into the steel pipe 2 by the PC steel material 8, and the concrete is filled is compared with the others. It can be seen that an extremely high yield moment value can be obtained and that the proof stress is excellent.

このように本実施例では、請求項１に対応して、鋼管２内に配置された圧縮部材に圧縮力を加え、圧縮部材の伸長方向の弾性復元力により該鋼管の長さ方向に引張力を加える耐荷材の製造方法において、圧縮部材がアンボンド式のＰＣ鋼材たるＰＣ鋼棒３であり、鋼管２内の断面に部分的に充填材31を充填して該充填材31によりＰＣ鋼棒３を拘束した後、ＰＣ鋼棒３に圧縮力を加え、ＰＣ鋼棒３により鋼管２の長さ方向に前記引張力を加えた後、鋼管２内にセメント系充填材33を充填するから、アンボンド式のＰＣ鋼棒３を充填材31により包んで拘束することにより、座屈が発生することなく、ＰＣ鋼棒３を圧縮することができる。また、圧縮後、ＰＣ鋼棒３の弾性復元力により鋼管２に引張力が導入され、鋼管２に伸びを与えることができる。この場合、鋼管２には充填材31が部分的に設けられているから、鋼管２全体に充填材を設けた場合に比べて大きな伸びを得ることができる。
このように製造することにより、曲げモーメントによって鋼管２に長さ方向の圧縮力が加わると、この圧縮力に対してＰＣ鋼棒３の引張力が対抗することにより、荷重に強い耐荷材１が得られる。 Thus, in this embodiment, corresponding to claim 1, a compression force is applied to the compression member disposed in the steel pipe 2, and a tensile force is applied in the length direction of the steel pipe by the elastic restoring force in the extension direction of the compression member. In the method of manufacturing a load-bearing material, the compression member is a PC steel rod 3 which is an unbonded PC steel material, and the filler 31 is partially filled in the cross section in the steel pipe 2 and the PC steel rod 3 is filled with the filler 31. Since the compressive force is applied to the PC steel bar 3 and the tensile force is applied in the length direction of the steel pipe 2 by the PC steel bar 3, the cement-based filler 33 is filled in the steel pipe 2, By enclosing and restraining the PC steel rod 3 of the type with a filler 31, the PC steel rod 3 can be compressed without causing buckling. In addition, after compression, a tensile force is introduced into the steel pipe 2 by the elastic restoring force of the PC steel rod 3, and the steel pipe 2 can be stretched. In this case, since the filler 31 is partially provided in the steel pipe 2, it is possible to obtain a greater elongation than when the filler is provided in the entire steel pipe 2.
By manufacturing in this way, when a compressive force in the length direction is applied to the steel pipe 2 by the bending moment, the tensile force of the PC steel rod 3 opposes this compressive force, so that the load-bearing material 1 that is strong against the load is obtained. can get.

また、このように本実施例では、請求項２に対応して、鋼管２の断面一側にＰＣ鋼棒３を配置し、鋼管２の断面他側に引張部材たるＰＣ鋼材８により圧縮力を付与するから、さらに、曲げモーメントによって鋼管２に長さ方向の引張力が加わると、この引張力に対してＰＣ鋼材８の圧縮力が対抗することにより、荷重に強い耐荷材１が得られる。すなわち、曲げモーメントにより発生する断面一側の圧縮力と断面他側の引張力とに対して、ＰＣ鋼棒３の引張力とＰＣ鋼材８の緊張力とが対抗する。   In this way, in this embodiment, corresponding to claim 2, the PC steel rod 3 is arranged on one side of the cross section of the steel pipe 2, and the compressive force is applied to the other side of the cross section of the steel pipe 2 by the PC steel material 8 as a tensile member. Therefore, when a tensile force in the length direction is further applied to the steel pipe 2 by the bending moment, the compressive force of the PC steel material 8 opposes this tensile force, whereby the load-resistant material 1 that is strong against the load is obtained. That is, the tensile force of the PC steel rod 3 and the tension force of the PC steel material 8 are opposed to the compressive force on one side of the cross section and the tensile force on the other side of the cross section generated by the bending moment.

また、このように本実施例では、請求項３に対応して、長さ方向に間隔を置いて鋼管２に対をなす支圧部たる支圧板４，４´を設け、ＰＣ鋼棒３は、それら支圧板４，４´の間隔を広げる方向の弾性復元力を有するから、支圧板４，４´間を広げるＰＣ鋼棒３の弾性復元力により鋼管２の長さ方向に引張力を加えることができる。   In this way, in this embodiment, corresponding to claim 3, the supporting plates 4 and 4 'are provided as supporting members that are paired with the steel pipe 2 at intervals in the length direction. Since it has an elastic restoring force in the direction of widening the interval between the bearing plates 4 and 4 ', a tensile force is applied in the length direction of the steel pipe 2 by the elastic restoring force of the PC steel rod 3 that widens the space between the bearing plates 4 and 4'. be able to.

また、このように本実施例では、請求項４に対応して、支圧部たる支圧板４，４´の間に鋼管２より小径な管体たる鞘管12を配置し、この鞘管12にＰＣ鋼材たるＰＣ鋼棒３を挿通すると共に鞘管12内に充填材31を充填して該充填材31により該ＰＣ鋼棒３を拘束するから、鋼管２に配置された管体12にＰＣ鋼棒３を挿通することにより、ＰＣ鋼棒３を略真っ直ぐに位置決めすることができ、ＰＣ鋼棒３を囲んで拘束する充填材31とその外側の鞘管12により、圧縮時におけるＰＣ鋼棒３の座屈を防止することができる。   In this way, in this embodiment, corresponding to the fourth aspect, the sheath tube 12 which is a tube body having a smaller diameter than the steel tube 2 is disposed between the bearing plates 4 and 4 ′ serving as the bearing portions. Since the PC steel rod 3 which is a PC steel material is inserted into the casing tube 12 and the filler 31 is filled in the sheath tube 12 and the PC steel rod 3 is constrained by the filler 31, the PC 12 is placed on the pipe body 12 arranged in the steel pipe 2. By inserting the steel rod 3, the PC steel rod 3 can be positioned substantially straight, and the PC steel rod at the time of compression is formed by the filler 31 surrounding and restraining the PC steel rod 3 and the outer sheath tube 12. 3 buckling can be prevented.

また、実施例上の効果として、管体たる鞘管12内にＰＣ鋼材たるＰＣ鋼棒３を位置決めするスペーサ16を設けたから、スペーサにより管体内のＰＣ鋼材の位置決めを行うことができる。   In addition, as an effect of the embodiment, since the spacer 16 for positioning the PC steel rod 3 as the PC steel material is provided in the sheath tube 12 as the tube body, the PC steel material in the pipe body can be positioned by the spacer.

また、このように本実施例では、請求項１に対応して、鋼管２の長さ方向に引張力を加えた後、鋼管２内にセメント系充填材33を充填するから、セメント系充填材33の充填後に引張力を導入するには、鋼管２及び充填材33の断面積が大きくなり、大きな導入力が必要となり、製造が困難となるが、セメント系充填材33の充填前に鋼管２に引張力を加えることにより、大きな引張力を加えることができ、得られた耐荷材１の弾性領域が広がる。 In this way, in this embodiment, in accordance with claim 1 , the cement-based filler 33 is filled in the steel pipe 2 after applying the tensile force in the length direction of the steel pipe 2. In order to introduce a tensile force after filling 33, the cross-sectional area of the steel pipe 2 and the filler 33 becomes large and a large introduction force is required, which makes it difficult to manufacture, but before the cement-based filler 33 is filled, the steel pipe 2 By applying a tensile force to the plate, a large tensile force can be applied, and the elastic region of the obtained load bearing material 1 is expanded.

また、このように本実施例では、請求項５に対応して、伸縮手段たるジャッキ22の伸長によりＰＣ鋼材たるＰＣ鋼棒３の端部を内側に押すと共に、前記伸長により鋼管２を外側に引張ってＰＣ鋼棒３に前記圧縮力を加えるから、ＰＣ鋼棒３の端部を内側に押すと共に、これとは逆方向の外側に鋼管２を引張ってＰＣ鋼棒３に前記圧縮力を加えるため、セットロスが小さく、有効プレストレスを大きくできるので、効率よくＰＣ鋼棒３を圧縮することができる。 Thus, in this embodiment, corresponding to claim 5 , the end of the PC steel rod 3 as the PC steel material is pushed inward by the extension of the jack 22 as the expansion / contraction means, and the steel pipe 2 is brought outward by the extension. Since the compression force is applied to the PC steel rod 3 by pulling, the end of the PC steel rod 3 is pushed inward, and the steel pipe 2 is pulled outward in the opposite direction to apply the compression force to the PC steel rod 3. Therefore, since the set loss is small and the effective prestress can be increased, the PC steel bar 3 can be efficiently compressed.

また、このように本実施例では、請求項６に対応して、請求項１〜５のいずれか１項に記載の耐荷材の製造方法により製造され、好ましくは鋼管２内にセメント系充填材33が充填されているから、弾性領域が大きな耐荷材１となる。 In this way, in this embodiment, corresponding to claim 6 , it is manufactured by the method for manufacturing a load-bearing material according to any one of claims 1 to 5 , and preferably in the steel pipe 2 a cement-based filler. Since 33 is filled, the load bearing material 1 has a large elastic region.

また、このように本実施例では、請求項７に対応して、請求項１〜４のいずれか１項に記載の耐荷材の製造方法に用いる耐荷材の製造装置において、支圧部たる支圧板４より外側でＰＣ鋼材たるＰＣ鋼棒３の端部側に配置され伸長動作によりＰＣ鋼棒３を内側に押して前記圧縮力を加える伸縮手段たるジャッキ22と、このジャッキ22の伸長動作により鋼管２の支圧板４側を外側に引張る引張部材たる連結杆26とを備えるから、ジャッキ22を伸長すると、ＰＣ鋼棒３を内側に押す力が加わり、同時にその反力により支圧板４側を外側に引く力が加わるため、セットロスが小さく、有効プレストレスを大きくできるので、ジャッキ22の動作により効率よくＰＣ鋼棒３を圧縮することができる。 As described above, in this embodiment, corresponding to claim 7 , in the load bearing material manufacturing apparatus used for the load bearing material manufacturing method according to any one of claims 1 to 4 , the support serving as the bearing portion is supported. A jack 22 which is disposed outside the pressure plate 4 on the end side of the PC steel rod 3 which is a PC steel material and pushes the PC steel rod 3 inward by an extension operation and applies the compression force, and a steel pipe by the extension operation of the jack 22 2 is provided with a connecting rod 26 that is a tension member that pulls the bearing plate 4 side to the outside. When the jack 22 is extended, a force is applied to push the PC steel bar 3 inward. Since the pulling force is applied, the set loss is small and the effective prestress can be increased. Therefore, the PC steel rod 3 can be efficiently compressed by the operation of the jack 22.

このようにジャッキ22はＰＣ鋼棒３を押し、且つ、ＰＣ鋼棒３を押すことによりジャッキ22が受ける反力を引張部材たる連結杆26により、支圧部たる支圧板４側を引張る力に用いている。したがって、反力を受けるためにジャッキ22の本体23側を壁などに固定する必要もない。   In this way, the jack 22 pushes the PC steel rod 3, and the reaction force received by the jack 22 by pushing the PC steel rod 3 is changed to a force that pulls the bearing plate 4 side serving as a bearing section by the connecting rod 26 serving as a tension member. Used. Therefore, it is not necessary to fix the main body 23 side of the jack 22 to a wall or the like in order to receive a reaction force.

また、実施例上の効果として、前記圧縮部材たるＰＣ鋼棒３の鋼管２内位置を位置決めする位置決め部材たる内装体11を備えるから、ＰＣ鋼棒３に圧縮力を加えても、内装体11により位置決めされているため、鋼棒３に座屈を防止でき、圧縮されたＰＣ鋼棒３の弾性復元力により鋼管２に引張力を導入することができる。また、耐荷材の製造方法において、引張部材たるＰＣ鋼材８を長さ方向に引張って緊張し、この緊張したＰＣ鋼材８の両端側を支圧部たる支圧板４，４´に定着するから、ＰＣ鋼材８の弾性復元力が、支圧板４，４´間を狭める方向の力とした働き、鋼管２の長さ方向に圧縮力を導入することができる。また、鋼管２の断面一側に圧縮部材たるＰＣ鋼棒３を配置し、鋼管２の断面他側に引張部材たるＰＣ鋼材８により圧縮力たる緊張力を付与し、前記引張力と前記緊張力を略同一に設定するから、長さ方向の軸力が釣り合い、鋼管２の長さ方向に軸力が発生することがない。   Further, as an effect of the embodiment, since the internal body 11 as a positioning member for positioning the position of the PC steel bar 3 as the compression member in the steel pipe 2 is provided, the internal body 11 is provided even if a compression force is applied to the PC steel bar 3. Therefore, buckling of the steel bar 3 can be prevented, and a tensile force can be introduced into the steel pipe 2 by the elastic restoring force of the compressed PC steel bar 3. Further, in the method of manufacturing a load-bearing material, the PC steel material 8 serving as a tension member is tensioned by being stretched in the length direction, and both ends of the strained PC steel material 8 are fixed to the bearing plates 4 and 4 ′ serving as the bearing portions. The elastic restoring force of the PC steel material 8 acts as a force in the direction of narrowing the space between the support plates 4 and 4 ′, and a compressive force can be introduced in the length direction of the steel pipe 2. Further, a PC steel rod 3 as a compression member is disposed on one side of the cross section of the steel pipe 2, and a tension force as a compression force is applied to the other side of the cross section of the steel pipe 2 by a PC steel material 8 as a tension member. Are set substantially the same, the axial force in the length direction is balanced, and no axial force is generated in the length direction of the steel pipe 2.

図１３は、本発明の実施例２を示し、上記実施例１と同一部分に同一符号を付し、その詳細な説明を省略して詳述すると、この例の耐荷材１では、前記鞘管12を用いずに、ＰＣ鋼棒３を拘束する充填材31を、鋼管２の断面の２分の１以下に充填し、硬化させる。すなわち、充填材31の上面31Ａは、鋼管２の断面高さの２分の１以下であり、好ましくは３分の１以下で、且つＰＣ鋼棒３と上面31Ａとの間が所定寸法を備えており、所定寸法としては、ＰＣ鋼棒３に圧縮力を加えた際に、前記ＰＣ鋼棒３と上面31Ａとの間の充填材31が破損しない程度の寸法である。   FIG. 13 shows a second embodiment of the present invention. The same reference numerals are given to the same portions as those of the first embodiment, and detailed description thereof will be omitted. Without using 12, the filler 31 for restraining the PC steel rod 3 is filled to half or less of the cross section of the steel pipe 2 and cured. That is, the upper surface 31A of the filler 31 is less than or equal to one half of the cross-sectional height of the steel pipe 2, and preferably less than or equal to one third, and a predetermined dimension is provided between the PC steel rod 3 and the upper surface 31A. The predetermined dimension is such that when the compressive force is applied to the PC steel bar 3, the filler 31 between the PC steel bar 3 and the upper surface 31A is not damaged.

したがって、アンポンド式のＰＣ鋼棒３を長さ方向に圧縮する力を加えても、充填材31によりＰＣ鋼棒３が位置決め状態で拘束されているため、座屈を起すことがなく、その圧縮したＰＣ鋼棒３の両端を支圧板４，４に定着して鋼管２の断面一側に引張力を付与することができる。   Therefore, even if a force that compresses the unpound type PC steel rod 3 in the length direction is applied, the PC steel rod 3 is restrained in the positioning state by the filler 31 and therefore, the buckling does not occur. Both ends of the PC steel rod 3 can be fixed to the bearing plates 4 and 4 to apply a tensile force to one side of the cross section of the steel pipe 2.

この例では、鞘管12などを用いずに充填材31によりＰＣ鋼棒３を位置決め拘束するため、構造簡易となり、製造が容易となる。   In this example, since the PC steel rod 3 is positioned and restrained by the filler 31 without using the sheath tube 12 or the like, the structure becomes simple and the manufacture becomes easy.

このように本実施例においても、充填材31によりＰＣ鋼棒３を包み、上記各実施例と同様な作用・効果を奏する。   Thus, also in the present embodiment, the PC steel rod 3 is wrapped with the filler 31, and the same operations and effects as in the above embodiments are exhibited.

図１４は、本発明の実施例３を示し、上記実施例１と同一部分に同一符号を付し、その詳細な説明を省略して詳述すると、この例では、実施例２の耐荷材１において、鋼管２の内面にＰＣ鋼棒３の内面にスペーサ16Ａを設けており、このスペーサ16Ａは板状をなし、鋼管２の長さ方向に所定間隔毎に配置している。前記スペーサ16Ａには、前記円弧板17，17，17により形成され孔と同形の位置決め孔34が穿設されており、この位置決め孔34は３つの円弧の内端17Ａ，17Ａ，17Ａを通る仮想円の直径が前記ＰＣ鋼棒３の外径に略対応し、実際には、前記仮想円の直径をＰＣ鋼棒３の外径より僅かに大きく設定している。   FIG. 14 shows a third embodiment of the present invention. The same reference numerals are given to the same portions as those of the first embodiment, and detailed description thereof is omitted. In this example, the load-bearing material 1 of the second embodiment is shown in FIG. , A spacer 16A is provided on the inner surface of the steel pipe 2 on the inner surface of the PC steel rod 3, and the spacer 16A has a plate shape and is arranged at predetermined intervals in the length direction of the steel pipe 2. The spacer 16A is formed with a positioning hole 34 formed by the circular arc plates 17, 17, 17 and having the same shape as the hole. The positioning hole 34 is a virtual passage through the inner ends 17A, 17A, 17A of the three arcs. The diameter of the circle substantially corresponds to the outer diameter of the PC steel rod 3, and actually the diameter of the virtual circle is set slightly larger than the outer diameter of the PC steel rod 3.

したがって、複数のスペーサ16Ａ，16Ａ…にＰＣ鋼棒３を挿通して真っ直ぐに配置し、この状態で充填材31を充填して該充填材31内に前記ＰＣ鋼棒３を埋設する。   Therefore, the PC steel rod 3 is inserted straight into the plurality of spacers 16A, 16A..., And the filler 31 is filled in this state, and the PC steel rod 3 is embedded in the filler 31.

このように本実施例においても、充填材31によりＰＣ鋼棒３を包み、上記各実施例と同様な作用・効果を奏する。   Thus, also in the present embodiment, the PC steel rod 3 is wrapped with the filler 31, and the same operations and effects as in the above embodiments are exhibited.

図１５〜図１６は、本発明の実施例４を示し、上記実施例１と同一部分に同一符号を付し、その詳細な説明を省略して詳述すると、この例の耐荷材１では、前記鞘管12を用いずに、充填空間形成部材41を用い、この充填空間形成部材41は、縁部42，42間に上部開口43を有する有底な断面形状をなし、コ字形鋼，山形鋼や半円鋼管などが例示され、前記縁部42，42を鋼管２の内面に溶着などにより固定することにより、該鋼管２の内面との間に充填空間44を形成するものである。   FIGS. 15-16 shows Example 4 of this invention, attaches | subjects the same code | symbol to the same part as the said Example 1, and abbreviate | omits the detailed description, In the load-bearing material 1 of this example, Instead of using the sheath tube 12, a filling space forming member 41 is used. The filling space forming member 41 has a bottomed cross-sectional shape having an upper opening 43 between the edges 42, 42, a U-shaped steel, and a chevron shape. A steel, a semicircular steel pipe, etc. are illustrated, The said edge parts 42 and 42 are fixed to the inner surface of the steel pipe 2 by welding etc., and the filling space 44 is formed between the inner surfaces of this steel pipe 2. FIG.

そして、充填空間44内にＰＣ鋼棒３を真っ直ぐに配置した後、該充填空間44内に充填材31を充填し、充填材31が硬化した後、アンポンド式のＰＣ鋼棒３を長さ方向に圧縮する力を加えても、充填材31によりＰＣ鋼棒３が位置決め状態で拘束されているため、座屈を起すことがなく、その圧縮したＰＣ鋼棒３の両端を支圧板４，４に定着して鋼管２の断面一側に引張力を付与することができる。   After the PC steel bar 3 is placed straight in the filling space 44, the filling material 44 is filled with the filling material 31, and after the filling material 31 is hardened, the unpound PC steel rod 3 is moved in the length direction. Even if a compressive force is applied to the steel plate 3, the PC steel rod 3 is restrained in a positioning state by the filler 31, so that buckling does not occur and both ends of the compressed PC steel rod 3 are supported at the support plates 4, 4. It is possible to apply a tensile force to one side of the cross section of the steel pipe 2.

このように本実施例においても、充填材31によりＰＣ鋼棒３を包み、上記各実施例と同様な作用・効果を奏する。   Thus, also in the present embodiment, the PC steel rod 3 is wrapped with the filler 31, and the same operations and effects as in the above embodiments are exhibited.

図１７は、本発明の実施例５を示し、上記実施例１と同一部分に同一符号を付し、その詳細な説明を省略して詳述すると、この例では、実施例３の耐荷材１において、充填空間44内にＰＣ鋼棒３のスペーサ16Ａを設けており、このスペーサ16Ａは板状をなし、鋼管２の長さ方向に所定間隔毎に配置している。前記スペーサ16Ａには、前記円弧板17，17，17により形成され孔と同形の位置決め孔34が穿設されており、この位置決め孔34は３つの円弧の内端17Ａ，17Ａ，17Ａを通る仮想円の直径が前記ＰＣ鋼棒３の外径に略対応し、実際には、前記仮想円の直径をＰＣ鋼棒３の外径より僅かに大きく設定している。   FIG. 17 shows a fifth embodiment of the present invention. The same reference numerals are given to the same portions as those of the first embodiment, and detailed description thereof will be omitted. In this example, the load-bearing material 1 of the third embodiment is shown in FIG. , A spacer 16A for the PC steel rod 3 is provided in the filling space 44. The spacer 16A has a plate shape and is arranged at predetermined intervals in the length direction of the steel pipe 2. The spacer 16A is formed with a positioning hole 34 formed by the circular arc plates 17, 17, 17 and having the same shape as the hole. The positioning hole 34 is a virtual passage through the inner ends 17A, 17A, 17A of the three arcs. The diameter of the circle substantially corresponds to the outer diameter of the PC steel rod 3, and actually the diameter of the virtual circle is set slightly larger than the outer diameter of the PC steel rod 3.

したがって、複数のスペーサ16Ａ，16Ａ…にＰＣ鋼棒３を挿通して真っ直ぐに配置し、この状態で充填材31を充填して該充填材31内に前記ＰＣ鋼棒３を埋設する。   Therefore, the PC steel rod 3 is inserted straight into the plurality of spacers 16A, 16A..., And the filler 31 is filled in this state, and the PC steel rod 3 is embedded in the filler 31.

このように本実施例においても、充填材31によりＰＣ鋼棒３を包み、上記各実施例と同様な作用・効果を奏する。   Thus, also in the present embodiment, the PC steel rod 3 is wrapped with the filler 31, and the same operations and effects as in the above embodiments are exhibited.

図１８〜図１９は、本発明の実施例６を示し、上記実施例１と同一部分に同一符号を付し、その詳細な説明を省略して詳述すると、この例では、実施例３の耐荷材１において、前記充填空間形成部材41を用い、この充填空間形成部材41の縁部42，42を鋼管２の内面に仮固定し、鋼管２の内面との間に充填空間44を形成するものである。   18 to 19 show a sixth embodiment of the present invention. The same reference numerals are given to the same portions as those of the first embodiment, and detailed description thereof will be omitted. In this example, the third embodiment is the same as the third embodiment. In the load bearing material 1, the filling space forming member 41 is used, and the edge portions 42, 42 of the filling space forming member 41 are temporarily fixed to the inner surface of the steel pipe 2, thereby forming the filling space 44 between the inner surface of the steel pipe 2. Is.

そして、充填空間44内にＰＣ鋼棒３を真っ直ぐに配置した後、該充填空間44内に充填材31を充填し、充填材31が硬化した後、図１９に示すように、前記充填空間形成部材41を鋼管２から取り外す。この後、アンポンド式のＰＣ鋼棒３を長さ方向に圧縮する力を加えても、充填材31によりＰＣ鋼棒３が位置決め状態で拘束されているため、座屈を起すことがなく、その圧縮したＰＣ鋼棒３の両端を支圧板４，４に定着して鋼管２の断面一側に引張力を付与することができる。   And after arrange | positioning the PC steel rod 3 straightly in the filling space 44, the filling material 31 is filled in the filling space 44, and after the filling material 31 is hardened, as shown in FIG. The member 41 is removed from the steel pipe 2. After that, even if a force for compressing the uncoiled PC steel bar 3 in the length direction is applied, the PC steel bar 3 is restrained in the positioning state by the filler 31, so that buckling does not occur. Both ends of the compressed PC steel rod 3 can be fixed to the bearing plates 4, 4, and a tensile force can be applied to one side of the cross section of the steel pipe 2.

このように本実施例においても、充填材31によりＰＣ鋼棒３を包み、上記各実施例と同様な作用・効果を奏する。   Thus, also in the present embodiment, the PC steel rod 3 is wrapped with the filler 31, and the same operations and effects as in the above embodiments are exhibited.

図２０は、本発明の実施例７を示し、上記実施例１と同一部分に同一符号を付し、その詳細な説明を省略して詳述すると、この例では、断面角形の鋼管２Ａを用いており、その鋼管２Ａの対向する辺の中央に対応して、前記ＰＣ鋼棒３とＰＣ鋼材８とを配置しており、このように断面角形の鋼管２Ａを用いても、上記各実施例と同様な作用・効果を奏する。   FIG. 20 shows a seventh embodiment of the present invention. The same reference numerals are given to the same portions as those of the first embodiment, and detailed description thereof will be omitted. In this example, a steel pipe 2A having a square cross section is used. The PC steel rod 3 and the PC steel material 8 are arranged corresponding to the center of the opposite sides of the steel pipe 2A. Even when the steel pipe 2A having a square cross section is used as described above, Has the same actions and effects as

なお、本発明は、前記実施例に限定されるものではなく、種々の変形実施が可能である。例えば、実施例では、断面円形の圧縮部材を示したが、断面角形でもよい。   In addition, this invention is not limited to the said Example, A various deformation | transformation implementation is possible. For example, in the embodiment, a compression member having a circular cross section is shown, but a square cross section may be used.

本発明の実施例１を示す耐荷材の断面図である。It is sectional drawing of the load bearing material which shows Example 1 of this invention. 同上、内装体の側面図である。It is a side view of an interior body same as the above. 同上、一端側の支圧板を示し、図３（Ａ）は正面図、図３（Ｂ）は側面図である。FIG. 3A is a front view, and FIG. 3B is a side view. 同上、他端側の支圧板を示し、図４（Ａ）は正面図、図４（Ｂ）は側面図である。FIG. 4A is a front view, and FIG. 4B is a side view. 同上、管体用スペーサの正面図である。It is a front view of a spacer for pipes same as the above. 同上、管体にＰＣ鋼棒を挿通した状態の管体の断面図である。It is sectional drawing of a tubular body of the state which inserted the PC steel rod in the tubular body same as the above. 同上、ＰＣ鋼棒に圧縮力を加える製造装置の使用状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the use condition of the manufacturing apparatus which applies compressive force to a PC steel bar same as the above. 同上、ＰＣ鋼棒に圧縮力を加える製造装置の使用状態を示す平断面図である。It is a top sectional view which shows the use condition of the manufacturing apparatus which applies compressive force to a PC steel bar same as the above. 同上、図７のＡ−Ａ線断面である。It is an AA line cross section of FIG. 7 same as the above. 同上、鋼管に充填材を充填した耐荷材の要部の断面図である。It is sectional drawing of the principal part of the load-bearing material which filled the steel pipe with the filler same as the above. 同上、耐荷材の概略説明図である。It is a schematic explanatory drawing of a load bearing material same as the above. 同上、試験品（Ａ）〜（Ｅ）のモーメントＭと曲率φの関係を示すグラフ図である。It is a graph which shows the relationship between the moment M and curvature (phi) of test products (A)-(E) same as the above. 本発明の実施例２を示す耐荷材の断面図である。It is sectional drawing of the load bearing material which shows Example 2 of this invention. 本発明の実施例３を示す耐荷材の断面図である。It is sectional drawing of the load bearing material which shows Example 3 of this invention. 本発明の実施例４を示す耐荷材の断面図である。It is sectional drawing of the load bearing material which shows Example 4 of this invention. 同上、充填空間形成部材の断面図である。It is sectional drawing of a filling space formation member same as the above. 本発明の実施例５を示す耐荷材の断面図である。It is sectional drawing of the load bearing material which shows Example 5 of this invention. 本発明の実施例６を示す耐荷材の断面図である。It is sectional drawing of the load bearing material which shows Example 6 of this invention. 同上、充填空間形成部材を取り外した耐荷材の断面図である。It is sectional drawing of the load-bearing material which removed the filling space formation member same as the above. 本発明の実施例７を示す耐荷材の断面図である。It is sectional drawing of the load bearing material which shows Example 7 of this invention.

符号の説明Explanation of symbols

１ 耐荷材
２ 鋼管
３ ＰＣ鋼棒（圧縮部材）
４，４´ 支圧板
８ ＰＣ鋼材（引張部材）
12 鞘管（管体）
12Ａ 鞘管（管体）
13 管体用スペーサ
16 スペーサ
21 製造装置
22 ジャッキ（伸縮手段）
26 連結杆
31 充填材
33 セメント系充填材 1 Load-bearing material 2 Steel pipe 3 PC steel bar (compressed member)
4, 4 'bearing plate 8 PC steel (tensile member)
12 sheath tube (tube)
12A sheath tube (tube)
13 Tube spacer
16 Spacer
21 Production equipment
22 Jack (extension / retraction means)
26 Linkage
31 Filler
33 Cement-based filler

Claims (7)

鋼管内に配置された圧縮部材に圧縮力を加え、前記圧縮部材の伸長方向の弾性復元力により該鋼管の長さ方向に引張力を加える耐荷材の製造方法において、前記圧縮部材がアンボンド式のＰＣ鋼材であり、前記鋼管内の断面に部分的に充填材を充填して該充填材により前記ＰＣ鋼材を拘束した後、前記ＰＣ鋼材に圧縮力を加え、前記ＰＣ鋼材により前記鋼管の長さ方向に前記引張力を加えた後、前記鋼管内にセメント系充填材を充填することを特徴とする耐荷材の製造方法。 A compressive force to the compression member disposed in the steel tube was added, in the manufacturing method of the load bearing material applying a tensile force in the length direction of the steel pipe by the elastic restoring force of the extending direction of said compression member, said compression member is unbonded formula It is a PC steel, and after filling the cross section in the steel pipe partially with the filler and constraining the PC steel with the filler, a compressive force is applied to the PC steel, and the length of the steel pipe is increased with the PC steel. After applying the tensile force in the direction, the steel pipe is filled with a cement-based filler . 前記鋼管の断面一側に前記ＰＣ鋼材を配置し、前記鋼管の断面他側に引張部材により圧縮力を付与することを特徴とする請求項１記載の耐荷材の製造方法。 The method for producing a load-bearing material according to claim 1, wherein the PC steel material is disposed on one side of the cross section of the steel pipe, and a compressive force is applied to the other side of the cross section of the steel pipe by a tensile member. 長さ方向に間隔を置いて前記鋼管に対をなす支圧部を設け、前記ＰＣ鋼材は、それら支圧部の間隔を広げる方向の弾性復元力を有することを特徴とする請求項１又は２記載の耐荷材の製造方法。 3. A bearing part that forms a pair with the steel pipe at intervals in the length direction is provided, and the PC steel material has an elastic restoring force in a direction that widens the interval between the bearing parts. The manufacturing method of the load-bearing material as described. 前記支圧部の間に前記鋼管より小径な管体を配置し、この管体に前記ＰＣ鋼材を挿通すると共に前記管体内に前記充填材を充填して該充填材により該ＰＣ鋼材を拘束することを特徴とする請求項１〜３のいずれか１項に記載の耐荷材の製造方法。 A pipe body having a diameter smaller than that of the steel pipe is disposed between the bearing portions, the PC steel material is inserted into the pipe body, the filler is filled in the pipe body, and the PC steel material is restrained by the filler. The method for producing a load-bearing material according to any one of claims 1 to 3, wherein: 伸縮手段の伸長により前記ＰＣ鋼材の端部を内側に押すと共に、前記伸長により前記鋼管を外側に引張って前記ＰＣ鋼材に前記圧縮力を加えることを特徴とする請求項１〜４のいずれか１項に記載の耐荷材の製造方法。 By extension of the telescopic means with pressing the edge portion of the PC steel inside, either the steel pipe pulling outwardly by the extension of the claims 1-4, characterized in that applying said compressive force to the PC steel 1 The method for producing a load-bearing material according to Item. 請求項１〜５のいずれか１項に記載の耐荷材の製造方法により製造されたことを特徴とする耐荷材。 A load-bearing material produced by the method for producing a load-bearing material according to any one of claims 1 to 5 . 請求項１〜４のいずれか１項に記載の耐荷材の製造方法に用いる耐荷材の製造装置において、前記ＰＣ鋼材の端部側に配置され伸長動作により前記ＰＣ鋼材を内側に押して前記圧縮力を加える伸縮手段と、この伸縮手段の伸長動作により前記鋼管を外側に引張る引張手段とを備えることを特徴とする耐荷材の製造装置。 The load-bearing material manufacturing apparatus used in the load-bearing material manufacturing method according to any one of claims 1 to 4 , wherein the PC steel material is pushed inward by an extension operation and is arranged on an end portion side of the PC steel material. And a tension means for pulling the steel pipe outward by an extension operation of the expansion / contraction means.
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