JP6202113B2 - Protective fence - Google Patents

Protective fence Download PDF

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JP6202113B2
JP6202113B2 JP2016006973A JP2016006973A JP6202113B2 JP 6202113 B2 JP6202113 B2 JP 6202113B2 JP 2016006973 A JP2016006973 A JP 2016006973A JP 2016006973 A JP2016006973 A JP 2016006973A JP 6202113 B2 JP6202113 B2 JP 6202113B2
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diameter pipe
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和人 河野
和人 河野
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Description

本発明は、落石、雪崩、土砂や崩壊等による災害を防止する防護柵に関する。   The present invention relates to a protective fence for preventing disasters caused by falling rocks, avalanches, earth and sand, or collapse.

従来、落石や雪崩等による土砂災害を防止する防護柵として、間隔をおいて立設した支柱間に多段的にロ−プ材を横架して構成する衝撃吸収柵において、隣り合う支柱に2本のロープ材の途上を把持するメイン衝撃吸収装置を取り付け、前記各支柱のメイン衝撃吸収装置に2本のロープ材の途上を重合させて挟持させ、重合させた各ロープ材の余長部にロープ材の抜け出しを拘束する端ストッパを取り付け、かつ重合させた各ロ−プ材のメイン衝撃吸収装置と端ストッパとの間を把持するサブ衝撃吸収装置を取り付け、前記メイン衝撃吸収装置及びサブ衝撃吸収装置がロープ材の引張強度以下の張力が作用した時にロープ材との摺動を許容する挟持力で把持し、端ストッパとサブ衝撃吸収装置とメイン衝撃吸収装置との当接時にロープ材の張力と支柱の曲げ力とを相互に伝達可能に構成したものがあり、支柱は、鋼管内にアンボンドタイプのPC鋼材を設置すると共に、鋼管内にコンクリートを充填して製作した剛性部材である(例えば特許文献1)。   Conventionally, as a protective fence to prevent landslides caused by falling rocks, avalanches, etc., in an impact absorbing fence constructed by laying a rope material in a multistage manner between struts erected at intervals, two adjacent struts A main shock absorbing device for gripping the middle of the rope material is attached, and the main shock absorbing device of each support column is overlapped with the middle of the two rope materials, and the superposed length of each rope material is overlapped. An end stopper for restraining the pull-out of the rope material is attached, and a sub impact absorbing device for gripping between the main impact absorbing device and the end stopper of each of the laminated rope materials is attached, the main impact absorbing device and the sub impact The absorber is gripped with a clamping force that allows sliding with the rope material when a tension below the tensile strength of the rope material is applied, and when the end stopper, the sub impact absorber and the main impact absorber are in contact, Zhang And the bending force of the column can be transmitted to each other. The column is a rigid member manufactured by installing an unbonded PC steel material in the steel pipe and filling the steel tube with concrete (for example, Patent Document 1).

また、支柱の強度を高めるために、内部にコンクリートなどを充填した二重鋼管からなる支柱が知られている。   Moreover, in order to raise the intensity | strength of a support | pillar, the support | pillar which consists of a double steel pipe which filled concrete etc. in the inside is known.

さらに、同一出願人は、地盤に立設する雪崩・落石等防護柵の支柱構造において、大径管と、前記大径管内に挿入される中径管と、前記中径管内に挿入される小径管とで三重管を構成し、前記三重管が、設置面より上方にあたる前記大径管の上部から、設置面より下方にあたる前記大径管の下部にかけて形成される雪崩・落石等防護柵の支柱構造(例えば特許文献2)を提案しており、この支柱構造においては、鋼管内にH形鋼を配置し、そのH形鋼のフランジ部の外面に板状補強材を設けることが記載されている。   Furthermore, the same applicant has a large diameter pipe, a medium diameter pipe inserted into the large diameter pipe, and a small diameter inserted into the medium diameter pipe in a support structure of a protection fence such as avalanche and falling rock standing upright on the ground. A triple pipe is configured with a pipe, and the triple pipe is formed from the upper part of the large-diameter pipe, which is above the installation surface, to the lower part of the large-diameter pipe, which is below the installation surface. A structure (for example, Patent Document 2) has been proposed, and in this support structure, it is described that an H-shaped steel is disposed in a steel pipe and a plate-shaped reinforcing material is provided on the outer surface of the flange portion of the H-shaped steel. Yes.

また、水平抵抗杭の分野では、中詰めコンクリートを有する水平抵抗鋼管杭において、鋼管内にH形鋼を配置し、このH形鋼の前後のフランジの前後面と鋼管内面との間に、鋼板等からなる前後方向の断面補強材を設けたものがある(例えば特許文献3)。   Moreover, in the field of horizontal resistance piles, in horizontal resistance steel pipe piles with filled concrete, H-shaped steel is arranged in the steel pipe, and a steel plate is provided between the front and rear surfaces of the flanges before and after the H-shaped steel and the inner surface of the steel pipe. There is one provided with a cross-sectional reinforcing material in the front-rear direction made of, for example, Patent Document 3.

上述したように、同一出願人は、地盤に立設する雪崩・落石等防護柵の支柱構造において、大径管と、この大径管内に挿入される中径管と、この中径管内に挿入される小径管とで三重管を構成した支柱構造(例えば特許文献)を提案しており、この支柱構造では、荷重に対する応力を効果的に向上することができる。 As described above, the same applicant has a large diameter pipe, a medium diameter pipe inserted into the large diameter pipe, and a medium diameter pipe inserted into the medium diameter pipe in the structure of a protective fence such as an avalanche and rockfall standing on the ground. A strut structure (for example, Patent Document 2 ) in which a triple pipe is configured with a small-diameter pipe is proposed. With this strut structure, stress against a load can be effectively improved.

そして、特許文献のように、杭式構造の落石防護柵はコンクリート基礎が必要なく、施工も簡単であるが、杭施工はダウンザハンマ工により掘削する場合がほとんどである。ダウンザハンマ工の工費は、掘削径により増加するため、落石規模が小さくなれば全体工事費の掘削施工比重が大きくなり、小規模杭式構造防護柵のメリットが価格的に低減してしまう問題がある。また、ダウンザハンマ工は道路からの施工が困難な場合は大型の足場が必要になり、資機材の運搬費も嵩む問題がある。 And like patent document 2 , although the rock fall protection fence of a pile-type structure does not require a concrete foundation and construction is easy, pile construction is mostly excavated by down-the-hammer construction. The down-the-hammer construction cost increases with the diameter of the drill, so if the falling rock scale is reduced, the overall construction cost will increase, and there will be a problem that the merit of the small-sized pile type protective fence will be reduced in price. . In addition, down-the-hammer construction requires a large scaffold when construction from the road is difficult, and there is a problem that the transportation cost of materials and equipment increases.

特許第2649891号公報Japanese Patent No. 2649891 特開2012−193589号公報JP 2012-193589 A 実開昭55−40031号公報Japanese Utility Model Publication No. 55-40031

上記特許文献2の支柱構造は、小〜中規模の落石・雪崩等の対策には優れている。しかし、対象が大規模になると、鋼管径と、この鋼管を建て込むための掘削孔径が大きくなり、設置現場の条件により対応が難しい場合がある。   The strut structure of Patent Document 2 is excellent in measures against small to medium-scale rockfalls and avalanches. However, when the object is large, the diameter of the steel pipe and the diameter of the drilling hole for installing the steel pipe become large, and it may be difficult to respond depending on the conditions of the installation site.

一方、上記特許文献3では、H形鋼と前後方向の断面補強材との組み合わせにより杭の強度を向上することができる。特に鋼管杭の内面に近いフランジを厚くするほど断面性能が向上する。しかし、H形鋼は規格品であるため、使用できる厚さには限度がある。また、前記断面補強材を設けることにより、鋼管杭とH形鋼とを一体化することができるが、前後方向の断面補強材では断面性能の上からは大きな効果は得られない。   On the other hand, in the said patent document 3, the intensity | strength of a pile can be improved by the combination of H-section steel and the cross-section reinforcement material of the front-back direction. In particular, the thicker the flange near the inner surface of the steel pipe pile, the better the cross-sectional performance. However, since the H-section steel is a standard product, there is a limit to the thickness that can be used. In addition, by providing the cross-sectional reinforcing material, the steel pipe pile and the H-shaped steel can be integrated, but a cross-sectional reinforcing material in the front-rear direction cannot provide a great effect in terms of cross-sectional performance.

さらに、断面補強材は、一端面がH形鋼のフランジ上面に溶接され、他端面が鋼管杭の内面に圧接している。このため鋼管杭の内部が断面補強材により仕切られるから、コンクリートを中詰めする際、仕切られた左右の空間に充填を行わないと、部分的に充填不良を起こす虞がある。   Further, the cross-section reinforcing material has one end surface welded to the upper surface of the flange of the H-shaped steel and the other end surface pressed against the inner surface of the steel pipe pile. For this reason, since the inside of a steel pipe pile is partitioned off by a cross-section reinforcing material, there is a possibility that partial filling failure may occur unless the left and right spaces are filled when filling concrete.

また、仮に上記特許文献3の杭をこの種の支柱に用いた場合、支柱は地上部分が必要なため全長が長くなる。そして、支柱の全長が長くなると、重量が増し、現場の条件により制約を受け、一体物として施工ができなくなる。このため支柱の外側を構成する鋼管とH形鋼とを別々に建て込み、現場で一体化する必要とする場合がある。   Moreover, when the pile of the said patent document 3 is used for this kind of support | pillar temporarily, since a support | pillar requires a ground part, full length becomes long. And if the full length of a support | pillar becomes long, a weight will increase, it will receive restrictions with the conditions on the field, and it will become impossible to construct as an integrated object. For this reason, the steel pipe and H-shaped steel which comprise the outer side of a support | pillar may be built separately, and it may be necessary to integrate on the spot.

そこで、本発明は、支柱の径を必要以上に大きくすることなく、大規模な落石・雪崩・崩壊土砂等の外力に対応することができる防護柵を提供することを目的とする。   Then, an object of this invention is to provide the protective fence which can respond to external forces, such as a large-scale falling rock, avalanche, and collapsed earth and sand, without enlarging the diameter of a support | pillar more than necessary.

本発明の請求項1における防護柵では、所定の間隔をおいて設けられ内部に充填材が充填された複数の支柱と、前記支柱間に設けた防護面とを備えた防護柵において、前記支柱は、大径管と、この大径管内に挿入される中径管と、この中径管内に挿入される小径管とを備え、設置面に立設され、前記設置面の上下に前記大径管と前記中径管と前記小径管が位置し、前記中径管には鍔部が設けられ、前記鍔部が前記大径管の下端に当接し、前記大径管の内周面と前記中径管の外周面との間の隙間が前記鍔部により塞がれ、連結手段により前記大径管と前記中径管と前記小径管とが連結され、前記小径管の下端は前記大径管の下端より下方に位置し、前記大径管及び前記小径管の下端位置から前記中径管の下端が下方に延設されていることを特徴とする。 The guard fence according to claim 1 of the present invention is a guard fence comprising a plurality of pillars provided at predetermined intervals and filled with a filler, and a guard surface provided between the pillars. includes a large diameter pipes, a diameter tube in which is inserted into the large diameter tube, the inside and a small-diameter tube that is inserted into the diameter tube, erected on the installation surface, the diameter above and below the mounting surface tube and to the small diameter pipe is positioned between the in-diameter pipe, the flange portion is provided in said diameter tube, abuts the flange portion at the lower end of the large diameter tube, wherein the inner peripheral surface of the large diameter tube A gap between the outer peripheral surface of the medium-diameter pipe is closed by the flange, and the large-diameter pipe, the medium-diameter pipe, and the small-diameter pipe are connected by connecting means, and the lower end of the small-diameter pipe is the large-diameter characterized in that positioned below the lower end of the tube, the lower end of the in-diameter tube from the lower end position of the large diameter tube and the smaller diameter tube is extended downwardly To.

請求項1の構成によれば、設置面下方の地中への建て込み部分は、主として大径管より小径な中径管で済むため、施工が容易となり、現場で、大径管と中径管と小径管とより設置面の上下が三重となった支柱を構築できる。また、支柱を分割して軽量化し、人力運搬・施工によりどんな場所でも簡単に杭式防護柵を設置することができる。   According to the configuration of the first aspect, since the portion to be built into the ground below the installation surface is mainly a medium-diameter pipe having a smaller diameter than the large-diameter pipe, the construction is facilitated, and the large-diameter pipe and the intermediate A strut can be constructed in which the upper and lower sides of the installation surface are tripled by a tube and a small diameter tube. In addition, it is possible to install a pile-type protective fence easily at any location by dividing the support and reducing the weight, and by carrying and constructing manpower.

求項の構成によれば、前記大径管の内周面と前記中径管の外周面との間の隙間を前記鍔部により塞ぐことができる According to the configuration of Motomeko 1, the gap between the outer peripheral surface in said diameter tube and the inner peripheral surface of the large diameter tube can be closed by the flange portion.

請求項の構成によれば、前記大径管と前記中径管と前記小径管とを連結手段により連結することができる。 According to the structure of Claim 1 , the said large diameter pipe | tube, the said medium diameter pipe | tube, and the said small diameter pipe | tube can be connected by a connection means.

本発明の請求項における防護柵では、前記小径管の外面に複数のストッパ片を設け、これら複数のストッパ片を前記中径管の上端に当接して前記中径管に対する前記小径管の高さ位置決めされていることを特徴とする。 The safety barrier in claim 2 of the present invention, a plurality of stopper pieces on the outer peripheral surface of the small diameter tube, the smaller diameter tube with respect to the in-diameter tube of the plurality of stopper piece abuts on the upper end of the in-diameter tube wherein the height of the is positioned.

請求項の構成によれば、前記中径管に対する前記小径管の高さを位置決めすることができる。 According to the structure of Claim 2 , the height of the said small diameter pipe with respect to the said medium diameter pipe can be positioned.

本発明の請求項における防護柵では、所定の間隔をおいて設けられ内部に充填材が充填された複数の支柱と、前記支柱間に設けた防護面とを備えた防護柵において、前記支柱は、大径管と、この大径管内に挿入される中径管と、この中径管内に挿入される小径管とを備え、設置面に立設され、前記設置面の上下に前記大径管と前記中径管と前記小径管が位置し、前記大径管の地中下端に連結され前記中径管と同径の管材と、それら大径管と管材とを連結する連結手段とを備え、前記大径管の下部に前記管材の上部が挿入された状態で、前記連結手段により前記大径管と前記管材とが連結され、前記管材の外周面の前記大径管に挿入した部分にスペーサが設けられ、前記スペーサにより前記大径管の中心と前記管材の中心が位置決めされ、前記管材には鍔部が設けられ、前記鍔部が前記大径管の下端に当接し、前記大径管の内周面と前記管材の外周面との間の隙間が前記鍔部により塞がれ、前記大径管の下端位置から前記管材の下端が下方に延設されていることを特徴とする。 In the protective fence according to claim 3 of the present invention, the protective fence includes a plurality of support columns provided at predetermined intervals and filled with a filler, and a protective surface provided between the support columns. Is provided with a large-diameter pipe, a medium-diameter pipe inserted into the large-diameter pipe, and a small-diameter pipe inserted into the medium-diameter pipe. tube and to the small diameter pipe is positioned between the in-diameter tube, and the tube material in said same diameter and diameter tube is connected to the ground lower end of the large-diameter tube, and a connecting means for connecting the their large diameter pipe and tubing A portion where the large-diameter pipe and the pipe material are connected by the connecting means in a state where the upper portion of the pipe material is inserted into the lower portion of the large-diameter pipe, and is inserted into the large-diameter pipe on the outer peripheral surface of the pipe material A spacer is provided, and the center of the large-diameter pipe and the center of the pipe material are positioned by the spacer, The pipe is provided with a flange, the flange contacts the lower end of the large-diameter pipe, and the gap between the inner peripheral surface of the large-diameter pipe and the outer peripheral surface of the pipe is closed by the flange. The lower end of the pipe material extends downward from the lower end position of the large-diameter pipe .

請求項の構成によれば、施工条件などにより長尺な大径管を現場に搬入できない場合、現場で大径管に管材を連結して延長することができる。 According to the third aspect, when it is not possible to carry on site a long large-diameter pipe due welding conditions, it can be lengthened by connecting the tubing to the large diameter tube in situ.

請求項の構成によれば、大径管の下部に前記管材の上部が挿入される。 According to the third aspect, the upper portion of the pipe member is inserted into the lower portion of the large-diameter pipe.

請求項の構成によれば、大径管と中径管と小径管とより設置面の上下が三重となった支柱を構築できる。 According to the structure of Claim 3 , the support | pillar by which the upper and lower sides of the installation surface were tripled by the large diameter pipe, the medium diameter pipe, and the small diameter pipe can be constructed.

請求項の構成によれば、前記大径管の内周面と前記管材の外周面との間の隙間を前記鍔部により塞ぐことができる。 According to the third aspect, the gap between the outer peripheral surface of the tubular member and the inner peripheral surface of the large-diameter pipe can be closed by the flange portion.

本発明の防護柵によれば、大規模な落石・雪崩・崩壊土砂等の外力に対応することができる防護柵を提供することができる。   According to the protective fence of the present invention, it is possible to provide a protective fence that can cope with external forces such as large-scale falling rocks, avalanches, collapsed earth and sand.

本発明の参考例1における防護柵の正面図である。It is a front view of the protection fence in the reference example 1 of this invention. 同上、防護柵の側面図である。It is a side view of a protection fence same as the above. 同上、端末支柱付近の正面図である。It is a front view of a terminal support | pillar vicinity same as the above. 同上、中間支柱付近の正面図である。It is a front view near an intermediate | middle support | pillar same as the above. 同上、端末支柱の管材と補強材の側面図である。It is a side view of the pipe material and reinforcement material of a terminal support | pillar same as the above. 同上、中間支柱の管材の側面図である。It is a side view of the pipe material of an intermediate | middle support | pillar same as the above. 同上、支柱上部の側面図である。It is a side view of a support | pillar upper part same as the above. 同上、支柱上部の平断面図である。It is a plane sectional view of a support | pillar upper part same as the above. 同上、設置面位置の支柱の平断面図である。It is a plane sectional view of the support | pillar of an installation surface position same as the above. 同上、スペーサ位置の支柱の平断面図である。It is a plane sectional view of the support | pillar of a spacer position same as the above. 同上、支柱の中央の側面図である。It is a side view of the center of a support | pillar same as the above. 同上、補強材下端における支柱の側面図である。It is a side view of the support | pillar in a reinforcing material lower end same as the above. 同上、端末支柱の緩衝用保持部付近の断面図である。It is sectional drawing of the holding | maintenance holding | maintenance part vicinity of a terminal support | pillar same as the above. 同上、端末支柱の緩衝用保持部付近の正面図である。It is a front view near the holding part for buffering of a terminal support | pillar same as the above. 同上、端末支柱の緩衝用保持部付近の側面図である。It is a side view near the holding part for buffering of a terminal support | pillar same as the above. 同上、中間支柱の固定用保持部付近の正面図である。It is a front view of the holding | maintenance holding part vicinity of an intermediate | middle support | pillar same as the above. 同上、中間支柱の固定用保持部付近の断面図である。It is sectional drawing of the holding part vicinity for fixing of an intermediate | middle support | pillar same as the above. 同上、固定用保持部の保持部本体の正面図である。It is a front view of the holding | maintenance part main body of a holding part for fixation same as the above. 同上、回転連結機構の一部切欠き正面図である。It is a partially cutaway front view of a rotation connection mechanism same as the above. 同上、回転連結機構の一部切欠き側面図である。FIG. 4 is a partially cutaway side view of the rotary coupling mechanism. 同上、回転連結機構の平面図である。It is a top view of a rotation connection mechanism same as the above. 本発明の参考例2における支柱上部の平断面図である。It is a top sectional view of the support | pillar upper part in the reference example 2 of this invention. 同上、設置面位置の支柱の平断面図である。It is a plane sectional view of the support | pillar of an installation surface position same as the above. 同上、スペーサ位置の支柱の平断面図である。It is a plane sectional view of the support | pillar of a spacer position same as the above. 本発明の参考例3における防護柵の正面図である。It is a front view of the protection fence in the reference example 3 of this invention. 同上、支柱上部の平断面図である。It is a plane sectional view of a support | pillar upper part same as the above. 同上、設置面位置の支柱の平断面図である。It is a plane sectional view of the support | pillar of an installation surface position same as the above. 同上、スペーサ位置の支柱の平断面図である。It is a plane sectional view of the support | pillar of a spacer position same as the above. 本発明の参考例4における支柱上部の平断面図である。It is a top sectional view of the support | pillar upper part in the reference example 4 of this invention. 同上、設置面位置の支柱の平断面図である。It is a plane sectional view of the support | pillar of an installation surface position same as the above. 同上、スペーサ位置の支柱の平断面図である。It is a plane sectional view of the support | pillar of a spacer position same as the above. 本発明の参考例5における支柱の平断面図である。It is a plane sectional view of the support in reference example 5 of the present invention. 同上、補強材下端における支柱の側面図である。It is a side view of the support | pillar in a reinforcing material lower end same as the above. 本発明の実施例1における防護柵の正面図である。It is a front view of the protection fence in Example 1 of this invention. 同上、大径管と中径管と小径管の側面図である。It is a side view of a large diameter pipe, a medium diameter pipe, and a small diameter pipe same as the above. 同上、支柱下部の側面図である。It is a side view of a support | pillar lower part same as the above. 同上、支柱上部の大径管と小径管の平面図である。It is a top view of the large diameter pipe and small diameter pipe of a support | pillar upper part same as the above. 同上、支柱上部の断面図である。It is sectional drawing of a support | pillar upper part same as the above. 同上、支柱上部の平面図である。It is a top view of a support | pillar upper part same as the above. 同上、小径管の中央の平面図である。It is a top view of the center of a small diameter pipe same as the above. 同上、小径管の下部の平面図である。It is a top view of the lower part of a small diameter pipe same as the above. 同上、支柱の要部の平面図である。It is a top view of the principal part of a support | pillar same as the above. 同上、小径管の下部の側面図である。It is a side view of the lower part of a small diameter pipe same as the above. 本発明の実施例2における防護柵の正面図である。It is a front view of the protection fence in Example 2 of this invention. 同上、大径管と中径管と小径管の側面図である。It is a side view of a large diameter pipe, a medium diameter pipe, and a small diameter pipe same as the above. 同上、端末支柱付近の正面図である。It is a front view of a terminal support | pillar vicinity same as the above. 同上、支柱下部の側面図である。It is a side view of a support | pillar lower part same as the above. 同上、支柱上部の大径管と小径管の平面図である。It is a top view of the large diameter pipe and small diameter pipe of a support | pillar upper part same as the above. 同上、支柱上部の断面図である。It is sectional drawing of a support | pillar upper part same as the above. 同上、支柱上部の平面図である。It is a top view of a support | pillar upper part same as the above. 同上、三重管部分の平面図である。It is a top view of a triple pipe part same as the above. 本発明の実施例3における端末支柱付近の正面図である。It is a front view of the terminal column vicinity in Example 3 of this invention. 本発明の実施例4における端末支柱付近の正面図である。It is a front view of the terminal column vicinity in Example 4 of this invention. 同上、大径管と中径管と小径管の側面図である。It is a side view of a large diameter pipe, a medium diameter pipe, and a small diameter pipe same as the above. 同上、支柱下部の側面図である。It is a side view of a support | pillar lower part same as the above.

以下、添付図面を参照しつつ、本発明における防護柵の好ましい参考例及び実施例を説明する。
[参考例1]
Hereinafter, with reference to the attached drawings, preferred reference examples and embodiments of the protective fence according to the present invention will be described.
[Reference Example 1]

図1〜図21は、本発明の参考例1を示すもので、本参考例の防護柵は、傾斜面1に沿って、その傾斜面1を備えた山側2と谷側3との境界部分近傍に立設された複数の支柱5と、支柱5間に上下方向に多段に設けられた横ロープ材6と、支柱5間に張設された防護面としての網材7を備えている。   FIGS. 1-21 shows the reference example 1 of this invention, and the guard fence of this reference example is the boundary part of the mountain side 2 and the trough side 3 provided with the inclined surface 1 along the inclined surface 1. FIG. A plurality of struts 5 erected in the vicinity, a horizontal rope member 6 provided in multiple stages in the vertical direction between the struts 5, and a net member 7 as a protective surface stretched between the struts 5 are provided.

支柱5としては、下部を地中に建て込まれ、横ロープ材6の各端部を保持する端末支柱8と、前記端末支柱8間に立設され、横ロープ材6の中間部分を保持する中間支柱9とを備えている。   As the support | pillar 5, the lower part is built in the ground, the terminal support | pillar 8 which hold | maintains each edge part of the horizontal rope material 6, and standing between the said terminal support | pillar 8, and hold | maintains the intermediate part of the horizontal rope material 6 Intermediate struts 9 are provided.

端末支柱8及び中間支柱9は、管材たる外側鋼管11の内部に、鋼製などからなる補強材12を設けている。この補強材12は、H形鋼からなる芯材13を備え、この芯材13は支柱5の引張領域(山側)と圧縮領域(反山側)に配置するフランジ部14,14と、これらフランジ部14,14の左右方向中央を連結するウエブ部15とを一体に備え、前後方向に長く形成されている。尚、前記フランジ部14が左右板部であり、前記ウエブ部15が前後板部である。前記フランジ部14,14の外面には、主補強板たる第1帯板16と副補強板たる第2帯板17が設けられている。尚、第1帯板16及び第2帯板17は鋼板等からなる。   The terminal strut 8 and the intermediate strut 9 are provided with a reinforcing member 12 made of steel or the like inside an outer steel pipe 11 which is a pipe material. The reinforcing member 12 includes a core member 13 made of H-shaped steel. The core member 13 is provided with flange portions 14 and 14 disposed in a tension region (mountain side) and a compression region (counter mountain side) of the support column 5, and these flange portions. The web part 15 which connects the center of the left-right direction of 14 and 14 is integrally provided, and is formed long in the front-back direction. The flange portion 14 is a left and right plate portion, and the web portion 15 is a front and rear plate portion. On the outer surfaces of the flange portions 14, 14, a first strip plate 16 as a main reinforcing plate and a second strip plate 17 as an auxiliary reinforcing plate are provided. The first strip 16 and the second strip 17 are made of a steel plate or the like.

前記第1帯板16の幅W1は第2帯板17の幅W2より広く又は同一で、第1帯板16の厚さT1は第2帯板17の厚さT2と同等又は厚さT2より厚い。また、円形の外側鋼管11の内径寸法Sに対して、幅W1は内径寸法Sの0.3〜0.7、幅W2は内径寸法Sの0.2〜0.5、但し、W1>=W2である。また、厚さT1は6〜49mm、厚さT2は6〜36である。また、第1帯板16及び第2帯板17の外側角部が、外側鋼管11の内面に接しないように第1帯板16及び第2帯板17の寸法が設定されている。尚、補強材12は前後対象・左右対称である。また、好ましくは、前記第1帯板16の幅W1は第2帯板17の幅W2より広く、第1帯板16の厚さT1は第2帯板17の厚さT2より厚い。   The width W1 of the first strip 16 is wider than or the same as the width W2 of the second strip 17, and the thickness T1 of the first strip 16 is equal to or equal to the thickness T2 of the second strip 17. thick. Further, with respect to the inner diameter dimension S of the circular outer steel pipe 11, the width W1 is 0.3 to 0.7 of the inner diameter dimension S, and the width W2 is 0.2 to 0.5 of the inner diameter dimension S, provided that W1> = W2. The thickness T1 is 6 to 49 mm, and the thickness T2 is 6 to 36. The dimensions of the first strip 16 and the second strip 17 are set so that the outer corners of the first strip 16 and the second strip 17 do not contact the inner surface of the outer steel pipe 11. In addition, the reinforcing material 12 is a front / rear object and left / right symmetrical. Preferably, the width W1 of the first strip 16 is wider than the width W2 of the second strip 17, and the thickness T1 of the first strip 16 is thicker than the thickness T2 of the second strip 17.

また、両側のフランジ部14,14は両側の第1帯板16を平行に配置するための位置決め部であり、強度上の必要性は低いから、そのフランジ部14の幅Wは60mm以上であればよい。   Further, the flange portions 14 on both sides are positioning portions for arranging the first strips 16 on both sides in parallel, and since the necessity for strength is low, the width W of the flange portion 14 should be 60 mm or more. That's fine.

さらに、第1帯板16はフランジ部14に部分的な溶接、例えば点溶接などにより取り付けられ、同様に、第2帯板17は第2帯板17に点溶接などにより取り付けられる。また、補強材12は外側鋼管11の一端から内部に挿入され、挿入後、外側鋼管11内には、無収縮モルタルなどのセメント系固化材からなる充填材10が充填され、例えば、充填材10にはセメントミルクが用いられる。従って、固化した充填材10により外側鋼管11と補強材12とが一体化されるから、帯板16,17及びフランジ部14は点溶接などにより固定しておけば済む。   Further, the first strip 16 is attached to the flange portion 14 by partial welding, for example, spot welding, and similarly, the second strip 17 is attached to the second strip 17 by spot welding or the like. Further, the reinforcing material 12 is inserted into one end of the outer steel pipe 11, and after the insertion, the outer steel pipe 11 is filled with a filler 10 made of a cement-based solidifying material such as a non-shrink mortar, for example, the filler 10 For this, cement milk is used. Accordingly, since the outer steel pipe 11 and the reinforcing material 12 are integrated by the solidified filler 10, the strip plates 16, 17 and the flange portion 14 may be fixed by spot welding or the like.

さらに、図9及び図10に示すように、補強材12には、その第1帯板16にスペーサ18を設けている。このスペーサ18は鋼製の板材からなり、第1帯板16の左,右側面16S,16Sの外側に設けられている。従って、補強材12の長さ方向において、前後左右の4箇所にスペーサ18が設けられている。また、この例では、第1帯板16,16の長さ方向両端側にスペーサ18を設けている。尚、長さ方向両端側のスペーサ18の間に、中央側のスペーサを設けてもよい。   Further, as shown in FIGS. 9 and 10, the reinforcing member 12 is provided with a spacer 18 on the first strip 16. The spacer 18 is made of a steel plate and is provided outside the left and right side surfaces 16S and 16S of the first strip plate 16. Accordingly, the spacers 18 are provided at four positions, front, rear, left and right, in the length direction of the reinforcing member 12. In this example, spacers 18 are provided on both ends of the first strips 16 and 16 in the length direction. A spacer on the center side may be provided between the spacers 18 on both ends in the length direction.

また、芯材13の下端は第1帯板16と第2帯板17に対して略同一位置か、下方に延設されており、芯材13の上端は第1帯板16と第2帯板17に対して上方に延設されている。さらに、外側鋼管11の上部には、第1帯板16と第2帯板17が設けられておらず、左右方向の貫通孔211,211を上下に間隔を置いて設けており、これら貫通孔211,211に対応して、前記芯材13のウエブ部15に貫通孔212,212を設けている。また、それら貫通孔211,212,211には、吊り下げ手段たる長ボルト213が挿通され、この長ボルト213にナット214,214が螺合される。尚、貫通孔211は芯材13の前後方向中央に設けられている。   Further, the lower end of the core member 13 extends substantially at the same position or downward with respect to the first band plate 16 and the second band plate 17, and the upper end of the core member 13 extends to the first band plate 16 and the second band plate. The plate 17 extends upward with respect to the plate 17. Further, the upper portion of the outer steel pipe 11 is not provided with the first strip 16 and the second strip 17, and through holes 211, 211 in the left-right direction are provided at intervals in the vertical direction. Corresponding to 211 and 211, through-holes 212 and 212 are provided in the web portion 15 of the core member 13. Further, long bolts 213 as suspension means are inserted into the through holes 211, 212, 211, and nuts 214, 214 are screwed into the long bolts 213. The through hole 211 is provided at the center in the front-rear direction of the core member 13.

さらに、支柱5の外面には、該支柱5の設置面1A位置の上下に跨るように、湾曲状の鋼板からなる外補強部215が設けられている。この外補強部215は、支柱5の外面の前後に該外面に沿うように設けられている。即ち、補強板215の角度θは、60度〜120度であり、この例では90度であるが、前記補強板215は、支柱5の半径の1/2未満の円弧(角度θが180度未満)であればよい。また、補強板215の高さ寸法は、設置面1Aの上部部分及び設置面1Aの埋設部分が支柱5の外径寸法以上としている。こうすることにより、支柱5に荷重を受けた際、応力が集中する支柱の設置面1A付近を効率よく強化することができる。   Further, an outer reinforcement portion 215 made of a curved steel plate is provided on the outer surface of the support column 5 so as to straddle the upper and lower sides of the position of the installation surface 1A of the support column 5. The outer reinforcing portion 215 is provided along the outer surface before and after the outer surface of the column 5. That is, the angle θ of the reinforcing plate 215 is 60 degrees to 120 degrees, which is 90 degrees in this example, but the reinforcing plate 215 is an arc having a radius less than ½ of the radius of the column 5 (the angle θ is 180 degrees). Less). The height of the reinforcing plate 215 is such that the upper portion of the installation surface 1 </ b> A and the embedded portion of the installation surface 1 </ b> A are equal to or larger than the outer diameter of the column 5. By doing so, when the load is applied to the support column 5, the vicinity of the installation surface 1A of the support column where stress concentrates can be efficiently strengthened.

また、外側鋼管11の貫通孔の上下には、山側2の傾斜面1に向けて外側鋼管11の外周面から突設した左右一対の第1のキャップ取付用プレート19及び第2のキャップ取付用プレート20を備えている。第1のキャップ取付用プレート19及び第2のキャップ取付用プレート20には、それぞれ第1のキャップ取付孔21及び第2のキャップ取付孔22を備えている。   A pair of left and right first cap mounting plates 19 projecting from the outer peripheral surface of the outer steel pipe 11 toward the inclined surface 1 on the mountain side 2 and the second cap mounting upper and lower sides of the through hole of the outer steel pipe 11. A plate 20 is provided. The first cap mounting plate 19 and the second cap mounting plate 20 are provided with a first cap mounting hole 21 and a second cap mounting hole 22, respectively.

端末支柱8の外側鋼管11は、山側2の傾斜面1に向けて設置される山側面に複数の緩衝用保持部23を上下方向に所定間隔をおいて備えている。   The outer steel pipe 11 of the terminal support column 8 includes a plurality of buffer holding portions 23 at predetermined intervals in the vertical direction on the side surface of the mountain that is installed toward the inclined surface 1 on the mountain side 2.

緩衝用保持部23は、一方を端末支柱8の外側鋼管11の山側面に取り付けられた、平面視略矩形の鋼製の板材からなる上下一対の第1の固定部材24,24と、第1の固定部材24,24間に回転自在に取り付けられた把持部25とを備えている。   The buffer holding portion 23 has a pair of upper and lower first fixing members 24 and 24 made of a steel plate having a substantially rectangular shape in plan view, one of which is attached to the mountain side surface of the outer steel pipe 11 of the terminal support column 8, The holding member 25 is rotatably mounted between the fixing members 24 and 24.

具体的には、図15などに示すように、把持部25の取り付けに側面コ字形のブラケット28を用いる。そして、ブラケット28の上下に端末支柱8の中心軸方向と平行に貫通して形成された軸孔26を形成し、この軸孔26にボルト等の第1の固定手段27を螺着し、この固定手段27を中心として前記ブラケット28を支柱5,8に回動自在に取り付けている。尚、前記ブラケット28の上下の横板部28Y,28Yには前記第1の固定手段を遊挿する透孔24A,24Aを穿設している。   Specifically, as shown in FIG. 15 or the like, a bracket 28 having a U-shaped side surface is used for attaching the grip portion 25. A shaft hole 26 formed so as to penetrate the bracket 28 in parallel with the central axis direction of the terminal column 8 is formed above and below the bracket 28, and a first fixing means 27 such as a bolt is screwed into the shaft hole 26. The bracket 28 is pivotally attached to the columns 5 and 8 with the fixing means 27 as the center. The upper and lower horizontal plate portions 28Y and 28Y of the bracket 28 are provided with through holes 24A and 24A for loosely inserting the first fixing means.

把持部25は、一対の把持片29,29を有し、これら把持片29,29の合わせ面には断面半円状の第1の凹溝31及び第2の凹溝32がそれぞれ支柱5の中心軸方向に所定間隔をおいて並設されている。そして、高力ボルト・ナット等の第2の固定手段25Aによって一対の把持片29,29と前記ブラケット28の縦板部28Tとを挟着し、第1の凹溝31,31同士と第2の凹溝32,32同士が対向して、把持部25を端末支柱8の中心軸方向と直交する方向に対して直線状、且つ断面略円状に貫通する第1及び第2の保持溝33,34が形成される。   The gripping portion 25 has a pair of gripping pieces 29, 29, and a first concave groove 31 and a second concave groove 32 having a semicircular cross section are provided on the mating surfaces of the gripping pieces 29, 29, respectively. They are arranged side by side at a predetermined interval in the central axis direction. Then, the pair of gripping pieces 29 and 29 and the vertical plate portion 28T of the bracket 28 are clamped by the second fixing means 25A such as high strength bolts and nuts, and the first concave grooves 31 and 31 and the second The first and second holding grooves 33 that pass through the grip portion 25 in a straight line and a substantially circular cross section with respect to the direction orthogonal to the central axis direction of the terminal column 8. , 34 are formed.

この把持部25では、端末支柱8の中心軸方向に所定間隔をおいて並設された第1の保持溝33及び第2の保持溝34の内径は、横ロープ材6の直径より小さく形成されており、横ロープ材6を第1の保持溝33及び第2の保持溝34に端末支柱8の中心軸方向と直交する方向に直線状、且つスライド自在な非固定状態に保持可能な構成としている。また把持部25は、ブラケット28によって端末支柱8から離間させて回転自在に備えている。   In this gripping portion 25, the inner diameters of the first holding groove 33 and the second holding groove 34 arranged in parallel at a predetermined interval in the central axis direction of the terminal column 8 are formed smaller than the diameter of the lateral rope member 6. The horizontal rope member 6 can be held in the first holding groove 33 and the second holding groove 34 in a straight and slidable non-fixed state in a direction perpendicular to the central axis direction of the terminal support column 8. Yes. The gripping portion 25 is provided so as to be rotatable away from the terminal column 8 by a bracket 28.

中間支柱9の外側鋼管11は、山側2の傾斜面1に向けて設置される山側面に前述の端末支柱8の緩衝用保持部23に対応させて複数の固定用保持部36を上下方向に所定間隔をおいて備えている。   The outer steel pipe 11 of the intermediate strut 9 has a plurality of fixing holding portions 36 in the vertical direction corresponding to the buffer holding portions 23 of the terminal struts 8 on the mountain side faced toward the inclined surface 1 of the mountain side 2. A predetermined interval is provided.

固定用保持部36は、中間支柱9の外側鋼管11の山側面に取り付けられた、平面視略半円形状の鋼製の板材からなる第2の固定部材37と、第2の固定部材37に取り付けられた保持部本体38とを備えている。   The fixing holding portion 36 is attached to a second fixing member 37 made of a steel plate having a substantially semicircular shape in plan view and attached to the mountain side surface of the outer steel pipe 11 of the intermediate column 9. And a holder main body 38 attached thereto.

保持部本体38は、上部に環状部39、中間部に抜け止め部40、そして下部に雄螺子部41を備えた、所謂アイボルトを採用しており、雄螺子部41を第2の固定部材37に中間支柱9の中心軸方向と平行に貫通して形成された長孔状の貫通部37Aに挿通して、抜け止め部40を第2の固定部材37の上面に当接させた状態で、第2の固定部材37の下方から雄螺子部41にナット41Aを螺合させて、第2の固定部材37に固定されるものである。   The holding portion main body 38 employs a so-called eyebolt having an annular portion 39 in the upper portion, a retaining portion 40 in the middle portion, and a male screw portion 41 in the lower portion, and the male screw portion 41 is connected to the second fixing member 37. In a state where the retaining portion 40 is in contact with the upper surface of the second fixing member 37 through a long hole-shaped through portion 37A formed so as to penetrate in parallel with the central axis direction of the intermediate support column 9. A nut 41 </ b> A is screwed into the male screw portion 41 from below the second fixing member 37, and is fixed to the second fixing member 37.

保持部本体38では、環状部39の内径が横ロープ材6の直径、第1の保持溝33、及び第2の保持溝34の内径より大きく形成されているとともに、抜け止め部40と第2の固定部材37の間や、第2の固定部材37とナット41Aの間にスペーサ(図示せず)を配置することにより、環状部39の上下方向、つまり中間支柱9の中心軸方向における位置を調整可能としている。   In the holding portion main body 38, the inner diameter of the annular portion 39 is formed larger than the inner diameter of the horizontal rope member 6, the first holding groove 33, and the second holding groove 34, and the retaining portion 40 and the second holding portion 38. By arranging a spacer (not shown) between the fixing members 37 and between the second fixing member 37 and the nut 41A, the position of the annular portion 39 in the vertical direction, that is, in the central axis direction of the intermediate strut 9 is set. Adjustable.

ここで、本参考例の横ロープ材6は、複数のワイヤー(ここでは3本)を撚り合わせたロープ材本体42と、ロープ材本体42の両端に備えた抜け止め用のストッパー部材43とを備えている。   Here, the horizontal rope member 6 of this reference example includes a rope member body 42 formed by twisting a plurality of wires (here, three pieces), and stopper members 43 for preventing the rope member 42 provided at both ends of the rope member body 42. I have.

各外側鋼管11の上部には、支柱キャップ44が装着される。支柱キャップ44は、内径を外側鋼管11の外径より大きく形成され、上部を閉塞して下部を開放した有底円筒形状を有している。   A support cap 44 is attached to the upper part of each outer steel pipe 11. The support cap 44 is formed with a larger inner diameter than the outer diameter of the outer steel pipe 11, and has a bottomed cylindrical shape in which the upper part is closed and the lower part is opened.

また、支柱キャップ44には、外側鋼管11の第1のキャップ取付用プレート19に対応して、山側2の傾斜面1に向けて設置される山側面に向けて支柱キャップ44の外周面から突設した左右一対の第3のキャップ取付用プレート45を備えている。第3のキャップ取付用プレート45には、切欠き溝状の第3のキャップ取付孔46を備えている。   Further, the support cap 44 protrudes from the outer peripheral surface of the support cap 44 toward the side of the mountain that is installed toward the inclined surface 1 of the mountain side 2 corresponding to the first cap mounting plate 19 of the outer steel pipe 11. A pair of left and right third cap mounting plates 45 are provided. The third cap mounting plate 45 is provided with a third cap mounting hole 46 having a notch groove shape.

各支柱5の回転連結構造については、第1のキャップ取付孔21と第3のキャップ取付孔46とが一致するように、第1のキャップ取付用プレート19上に第3のキャップ取付用プレート45が設置された状態で、支柱キャップ44が各支柱5の外側鋼管11の上部に外嵌されるものとする。   With respect to the rotational connection structure of each support column 5, the third cap mounting plate 45 is placed on the first cap mounting plate 19 so that the first cap mounting hole 21 and the third cap mounting hole 46 coincide with each other. It is assumed that the column cap 44 is fitted on the upper portion of the outer steel pipe 11 of each column 5 in a state where is installed.

そして、第3のキャップ取付孔46、第1のキャップ取付孔21、第2のキャップ取付孔22の順に挿通して、第2のキャップ取付用プレート20の下方から複数のナット47Aが螺着されて、第1のキャップ取付用プレート19、第2のキャップ取付用プレート20、第3のキャップ取付用プレート45を連結する取付ボルト47を備えている。   Then, the third cap mounting hole 46, the first cap mounting hole 21, and the second cap mounting hole 22 are inserted in this order, and a plurality of nuts 47A are screwed from below the second cap mounting plate 20. The first cap mounting plate 19, the second cap mounting plate 20, and the third cap mounting plate 45 are provided with mounting bolts 47.

第1のキャップ取付用プレート19と第2のキャップ取付用プレート20の間の取付ボルト47には、可動ブラケット48が水平方向に揺動自在に取り付けられている。可動ブラケット48は、鋼製の板材からなるブラケット本体49の一端に、取付ボルト47が挿通可能な円筒状の軸受部50を備えている。   A movable bracket 48 is attached to a mounting bolt 47 between the first cap mounting plate 19 and the second cap mounting plate 20 so as to be swingable in the horizontal direction. The movable bracket 48 includes a cylindrical bearing portion 50 into which a mounting bolt 47 can be inserted at one end of a bracket body 49 made of a steel plate material.

隣接する端末支柱8の上部と中間支柱9の上部とを連結する支持部材51は、円筒形状を有する鋼製の支持部材本体51Aと、支持部材本体51Aの両端に取り付けられた支持部材側取付部材52と、支持部材側取付部材52と可動ブラケット48とを連結する端部ブラケット53とを備えている。   The support member 51 that connects the upper part of the adjacent terminal column 8 and the upper part of the intermediate column 9 includes a steel support member main body 51A having a cylindrical shape, and support member side mounting members attached to both ends of the support member main body 51A. 52, and an end bracket 53 for connecting the support member side mounting member 52 and the movable bracket 48 to each other.

支持部材側取付部材52は、一方を支持部材本体51Aの両端に嵌挿され後、溶接等により支持部材本体51Aに固定されており、他方に取り付け用の取付孔(図示せず)を備えた鋼製の板材からなる。   One of the support member side mounting members 52 is inserted into both ends of the support member main body 51A, and then fixed to the support member main body 51A by welding or the like, and the other has mounting holes (not shown) for mounting. Made of steel plate.

端部ブラケット53は、一方から中間部分にかけて所定間隔をおいて複数の調整用取付孔(図示せず)を並設しているとともに、他方に可動ブラケット48に取り付けられる取付孔(図示せず)を備えた、少なくとも一方側を支持部材本体51A内に挿入可能に設けた鋼製の板材からなる。   The end bracket 53 has a plurality of adjustment mounting holes (not shown) arranged in parallel at predetermined intervals from one side to an intermediate portion, and a mounting hole (not shown) attached to the movable bracket 48 on the other side. It is made of a steel plate material provided at least one side so as to be insertable into the support member main body 51A.

可動ブラケット48と端部ブラケット53は、可動ブラケット48のブラケット本体49の貫通部(図示せず)と端部ブラケット53の取付孔(図示せず)とを介して、ボルト・ナット等の第3の固定手段57によって連結されている。   The movable bracket 48 and the end bracket 53 are connected to a third portion such as a bolt and a nut through a penetration portion (not shown) of the bracket body 49 of the movable bracket 48 and a mounting hole (not shown) of the end bracket 53. The fixing means 57 are connected.

また、端部ブラケット53と支持部材側取付部材52は、適宜複数の調整用取付孔(図示せず)の中から端末支柱8と中間支柱9との間隔に応じた調整用取付孔(図示せず)を選択して、その選択された支持部材側取付部材52の調整用取付孔(図示せず)と端部ブラケット53の取付孔(図示せず)を介して、ボルト・ナット等の第4の固定手段58によって連結されている。   Further, the end bracket 53 and the support member side mounting member 52 are appropriately provided with adjustment mounting holes (not shown) corresponding to the distance between the terminal column 8 and the intermediate column 9 among a plurality of adjustment mounting holes (not shown). Through the adjustment mounting hole (not shown) of the selected support member-side mounting member 52 and the mounting hole (not shown) of the end bracket 53, and the like. The four fixing means 58 are connected.

また、上下に多段に設けた横ロープ材6,6・・・には、支柱5,5の間において、横ロープ材6の上下方向の間隔を所定間隔に保持する間隔保持部材59が取り付けられている。この間隔保持部材59は、鋼製の板材に、端末支柱8の緩衝用保持部23と中間支柱9の固定用保持部36に対応して、横ロープ材6を挿通する複数のロープ挿通部61を所定間隔をおいて配置したものである。   In addition, the horizontal rope members 6, 6... Provided in the upper and lower stages are attached with a spacing member 59 that holds the horizontal rope material 6 in the vertical direction between the support columns 5, 5. ing. The spacing holding member 59 is formed of a plurality of rope insertion portions 61 through which the horizontal rope material 6 is inserted into a steel plate material corresponding to the buffer holding portion 23 of the terminal column 8 and the fixing holding portion 36 of the intermediate column 9. Are arranged at a predetermined interval.

ロープ挿通部61は、Uボルト62をナット(図示せず)で間隔保持部材59に固定して、Uボルト62と間隔保持部材59によって囲まれた環状部分に横ロープ材6を挿通するものである。   The rope insertion part 61 fixes the U bolt 62 to the interval holding member 59 with a nut (not shown), and inserts the horizontal rope member 6 into the annular portion surrounded by the U bolt 62 and the interval holding member 59. is there.

網材7は、各支柱5、支持部材51等によって囲まれた領域の山側2に配置された金属線材で編成した金網である。   The mesh material 7 is a wire mesh knitted with a metal wire disposed on the mountain side 2 in a region surrounded by each support column 5, the support member 51, and the like.

さらに、網材7は、結合コイル等の取付部材64を介して、横ロープ材6にも固定されて
いる。
Further, the net member 7 is also fixed to the horizontal rope member 6 via an attachment member 64 such as a coupling coil.

本参考例の支柱5と、比較例として外径が鋼管の267.4mm、厚さが41.0mmの断面性能について検討した。本参考例の実施品として、図9において、外側鋼管11は、外径が267.4mm、厚さが6.6mmで、芯材13は、H型鋼であって、前後幅が125mm、フランジ部14の左右幅が60mm、フランジ部14の厚さが8mm、ウエブ部15の厚さが6mmで、第1帯板16は、鋼板であって、左右幅が150mm、厚さが36mmで、第2帯板17は、鋼板であって、左右幅が100mm、厚さが16mmで、外側補強部215は、鋼板であって、厚さが6.6mm、角度θが90度のものを用いた。   As a comparative example, the cross-sectional performance of an outer diameter of 267.4 mm of steel pipe and a thickness of 41.0 mm was examined as a comparative example. In FIG. 9, the outer steel pipe 11 has an outer diameter of 267.4 mm and a thickness of 6.6 mm, and the core material 13 is an H-shaped steel having a front-rear width of 125 mm and a flange portion 14 in FIG. The left and right width is 60 mm, the flange portion 14 is 8 mm thick, the web portion 15 is 6 mm thick, the first strip 16 is a steel plate, the left and right width is 150 mm, the thickness is 36 mm, and the second strip The plate 17 is a steel plate having a lateral width of 100 mm and a thickness of 16 mm, and the outer reinforcing portion 215 is a steel plate having a thickness of 6.6 mm and an angle θ of 90 degrees.

Figure 0006202113
Figure 0006202113

上記表1は、比較例として、外径が同一で、厚さが41mmの鋼管を例示したものである。両者は断面係数が同一であるが、重量は比較例が20%以上重たくなる。また、キロ当たりの加工費が実施品が高いが、材料費・メッキ代・運搬費が重量に比例するから、全体として、支柱の単価としては、比較例が実施品の1.79倍以上となる。尚、実施品では、前後の第1帯板16,16と第2帯板17,17により、断面係数の50%以上(約53%)を得ることができる。   Table 1 exemplifies a steel pipe having the same outer diameter and a thickness of 41 mm as a comparative example. Both have the same section modulus, but the weight of the comparative example is 20% or more heavier. In addition, although the processing cost per kilometer is high for the implemented product, since the material cost, plating fee, and transportation cost are proportional to the weight, as a whole, the unit price of the support is 1.79 times or more that of the implemented product as a unit price. Become. In the embodiment, 50% or more (about 53%) of the section modulus can be obtained by the front and rear first strip plates 16, 16 and the second strip plates 17, 17.

特に、支柱を建て込む杭式構造の防護柵は、コンクリート基礎の設置し難い場所に設定されることがほとんどのため、掘削孔65の大きさや部材重量が制限されることが多い。これに対して、鋼管単品の比較品では、重量が重たいため、狭いスペースでの施工に不向きであり、また、厚さ41mmの汎用品はない。   In particular, since the pile-type protective fence in which the pillar is built is often set in a place where it is difficult to install a concrete foundation, the size and weight of the drilling hole 65 are often limited. On the other hand, the comparative product of a single steel pipe is heavy and thus unsuitable for construction in a narrow space, and there is no general-purpose product with a thickness of 41 mm.

上述の防護柵の支柱5の施工方法について説明すると、支柱5の設置面1Aに、外側鋼管11より大径な掘削孔65を形成し、この掘削孔65内に外側鋼管11の下部を挿入し、掘削孔65に外側鋼管11を建て込む。この場合、補強材12を挿入する前に、掘削孔65に充填材を充填して外側鋼管11を固定してもよいし、補強材12を外側鋼管11内に一体の設けた後に、外側鋼管11を掘削孔65に固定してもよい。   Explaining the construction method of the support fence post 5 described above, an excavation hole 65 having a diameter larger than that of the outer steel pipe 11 is formed in the installation surface 1A of the support pillar 5, and the lower part of the outer steel pipe 11 is inserted into the excavation hole 65. The outer steel pipe 11 is installed in the drilling hole 65. In this case, the outer steel pipe 11 may be fixed by filling the excavation hole 65 with the filler before inserting the reinforcing material 12, or after the reinforcing material 12 is integrally provided in the outer steel pipe 11, 11 may be fixed to the drilling hole 65.

支柱5を建て込んだ後、一方の貫通孔212を用いて補強材12を吊り上げる。そして、補強材12の下端12Kを外側鋼管11の上部開口に合わせて、補強材12を外側鋼管11内に吊り下ろし、図8に示すように、他方の貫通孔212と外側鋼管11の貫通孔211,211に長ボルト213を挿通し、長ボルト213にナット214,214を螺着する。この後、同様にして他方の貫通孔212と外側鋼管11の貫通孔211,211に長ボルト213を挿通し、長ボルト213にナット214,214を螺着する。この場合、外側鋼管11と補強材12を別々に吊り込むことができるため、ここの部品が軽量で済み、施工に制限を受ける箇所への設置が可能となる。   After the column 5 is built, the reinforcing member 12 is lifted using one through hole 212. Then, the lower end 12K of the reinforcing member 12 is aligned with the upper opening of the outer steel pipe 11, the reinforcing member 12 is suspended in the outer steel pipe 11, and the other through hole 212 and the through hole of the outer steel pipe 11 are shown in FIG. Long bolts 213 are inserted into 211 and 211, and nuts 214 and 214 are screwed into the long bolts 213. Thereafter, similarly, a long bolt 213 is inserted into the other through hole 212 and the through holes 211 and 211 of the outer steel pipe 11, and nuts 214 and 214 are screwed into the long bolt 213. In this case, since the outer steel pipe 11 and the reinforcing material 12 can be hung separately, the components here are light and can be installed in places subject to construction restrictions.

このようにして外側鋼管11内に補強材12を挿入すると、2本の長ボルト213,213により、外側鋼管11に対する補強材12の長さ方向が位置決めされる。また、2本の長ボルト213,213により、外側鋼管11の断面内における補強材12の上部側の前後位置が位置決めされ、複数個所のスペーサ18により、外側鋼管11の断面内における補強材12の前後左右位置が位置決める。   When the reinforcing member 12 is inserted into the outer steel pipe 11 in this way, the length direction of the reinforcing member 12 with respect to the outer steel pipe 11 is positioned by the two long bolts 213 and 213. In addition, the two long bolts 213 and 213 position the front and rear positions on the upper side of the reinforcing member 12 in the cross section of the outer steel pipe 11, and the spacers 18 at a plurality of locations of the reinforcing member 12 in the cross section of the outer steel pipe 11 The front-rear and left-right positions are positioned.

この状態で、外側鋼管11の上部開口から充填材10を充填すると、第1帯板16及び第2帯板17の外側角部と外側鋼管11の内面の隙間を通って、充填材10が外側鋼管11の内部にスムーズに充填される。そして、充填した充填材10が固化することにより、外側鋼管11内に補強材12が一体に設けられる。   When the filler 10 is filled from the upper opening of the outer steel pipe 11 in this state, the filler 10 is passed through the gap between the outer corners of the first strip 16 and the second strip 17 and the inner surface of the outer steel pipe 11. The inside of the steel pipe 11 is smoothly filled. And the reinforcing material 12 is integrally provided in the outer steel pipe 11 by solidifying the filled filler 10.

尚、支柱5は第1帯板16及び第2帯板17が山側2と反山側である谷側3に位置するように建て込む。   In addition, the support | pillar 5 is built so that the 1st strip 16 and the 2nd strip 17 may be located in the valley side 3 which is the mountain side 2 and the anti-mountain side.

防護柵は、山側2からの落石、雪崩、土砂等が防護柵の防護面である網材7に衝突すると、網材7にかかる衝撃を緩衝しようとして横ロープ材6が山側2から谷側3へと撓む。   When the falling rocks, avalanches, earth and sand, etc. from the mountain side 2 collide with the net material 7 which is the protective surface of the protective fence, the horizontal fence material 6 moves from the mountain side 2 to the valley side 3 in an attempt to buffer the impact applied to the net material 7. Deflection.

そして、横ロープ材6が山側2から谷側3へ撓む際に、緩衝側保持部23と固定側保持部36がそれぞれ保持している横ロープ材6が撓むことにより、緩衝側保持部23から横ロープ材6が引き出される。   And when the horizontal rope material 6 bends from the mountain side 2 to the valley side 3, the buffer rope side holding member 23 and the horizontal rope material 6 held by the fixed side holding portion 36 are bent, respectively, so that the buffer side holding portion The horizontal rope member 6 is pulled out from 23.

ここで、緩衝側保持部23では、把持部25が回転して、横ロープ材6の把持方向を横ロープ材6が撓んだ箇所に向けるので、横ロープ材6が撓んだ箇所へ向けての横ロープ材6の引き出しがスムーズに行われる。即ち、横ロープ材6が無理に屈曲されることを防止できる。   Here, in the buffer side holding part 23, since the holding part 25 rotates and the holding direction of the horizontal rope material 6 is directed to the location where the horizontal rope material 6 is bent, it is directed to the location where the horizontal rope material 6 is bent. All the horizontal rope members 6 are drawn out smoothly. That is, it is possible to prevent the lateral rope member 6 from being forcibly bent.

このように本参考例では、所定の間隔をおいて設けられた複数の支柱5と、支柱5間に設けた防護面たる網材7とを備えた防護柵において、支柱5は、管材たる外側鋼管11と、この外側鋼管11の内部に設けた補強材12と、外側鋼管11内に充填した充填材10を備え、補強材12は、前後方向の芯材13と、この芯材13の前側及び後側に設けた左右方向の主補強板たる第1帯板16とを備え、芯材13は前後方向の前後板部たるウエブ部15と、このウエブ部15の両端部に設けた左右方向の左右板部たるフランジ部14とを備え、第1帯板16はフランジ部14より左右方向に幅広で且つ肉厚であるから、幅広で肉厚な第1帯板16を外側鋼管11の内面側に配置することにより、曲げモーメントに対する断面性能が向上する。そして、芯材13は比較的安価な規格品であるI形鋼又はH形鋼を用い、主補強板は板材を用いることができるから、補強材12の構成が簡易となる。   As described above, in this reference example, in the protection fence including the plurality of support columns 5 provided at predetermined intervals and the net member 7 serving as a protection surface provided between the support columns 5, the support columns 5 are outside the tube material. A steel pipe 11, a reinforcing material 12 provided inside the outer steel pipe 11, and a filler 10 filled in the outer steel pipe 11 are provided. The reinforcing material 12 includes a core material 13 in the front-rear direction and a front side of the core material 13. And a first strip 16 as a main reinforcing plate in the left-right direction provided on the rear side, and the core member 13 includes a web portion 15 as a front-rear plate portion in the front-rear direction, and a left-right direction provided at both ends of the web portion 15. And the first strip 16 is wider and thicker in the left-right direction than the flange 14, so that the wider and thicker first strip 16 is attached to the inner surface of the outer steel pipe 11. By arranging on the side, the cross-sectional performance against the bending moment is improved. The core material 13 can be made of I-shaped steel or H-shaped steel, which is a relatively inexpensive standard product, and the main reinforcing plate can be made of a plate material. Therefore, the configuration of the reinforcing material 12 is simplified.

また、このように本参考例では、副補強板たる第2帯板17を備え、第2帯板17,17を前側及び後側の主補強板たる第1帯板16,16の前面及び後面に重ねて設けたから、第1帯板16と管材内面との間の隙間に第2帯板17を設けることにより、曲げモーメントに対する断面性能を向上することができる。   In this way, in this reference example, the second strip plate 17 serving as the auxiliary reinforcing plate is provided, and the second strip plates 17 and 17 are front and rear surfaces of the first strip plates 16 and 16 serving as the main reinforcing plates on the front side and the rear side. Since the second strip 17 is provided in the gap between the first strip 16 and the inner surface of the pipe material, the cross-sectional performance against the bending moment can be improved.

また、このように本参考例では、管材たる外側鋼管11の断面が円形であり、副補強板たる第2帯板17が主補強板たる第1帯板16より左右方向幅狭に形成されているから、断面円形の外側鋼管11内において、第1帯板16と外側鋼管11の内面との間の隙間に第2帯板17を設けることができ、この第2帯板17により曲げモーメントに対する断面性能を向上することができる。   In this way, in this reference example, the outer steel pipe 11 serving as the pipe material has a circular cross section, and the second strip 17 serving as the auxiliary reinforcing plate is formed to be narrower in the left-right direction than the first strip 16 serving as the main reinforcing plate. Therefore, the second strip 17 can be provided in the gap between the first strip 16 and the inner surface of the outer steel tube 11 in the outer steel pipe 11 having a circular cross section. The cross-sectional performance can be improved.

また、このように本参考例では、補強材12と管材たる外側鋼管11の内面との間に間隔を設けるスペーサ18を備えるから、間隔を挟んだ空間が間隔により連通するため、外側鋼管11の内部に充填材10をスムーズに充填することができる。   In addition, in this reference example, since the spacer 18 is provided between the reinforcing member 12 and the inner surface of the outer steel pipe 11 serving as the pipe material, the space having the gap communicated with the gap. The filler 10 can be filled smoothly inside.

また、このように本参考例では、主補強板たる第1帯板16の左右にスペーサ18,18を設けると共に、これらスペーサ18,18は第1帯板16の長さ方向に部分的に設けられているから、第1帯板16を外側鋼管11の内面に近接しても、主補強材と管材との内面に間隔を設けることができる。   As described above, in this reference example, the spacers 18 and 18 are provided on the left and right sides of the first strip plate 16 as the main reinforcing plate, and the spacers 18 and 18 are partially provided in the length direction of the first strip plate 16. Therefore, even if the 1st strip 16 is adjoined to the inner surface of the outer side steel pipe 11, a space | interval can be provided in the inner surface of a main reinforcement material and a pipe material.

また、参考例上の効果として、補強材12の長さ方向において、前後左右の4箇所にスペーサ18を設けたから、外側鋼管11に対して、補強材12の中心を合わせることができ、また、スペーサ18は鋼製の板片からなるから、外側鋼管11内に補強材12を挿入する場合の案内となる。さらに、芯材13の上端は第1帯板16と第2帯板17に対して上方に延設され、その芯材13の上端側に貫通孔211を設けたから、芯材13の上部を用いて吊り下ろしと、芯材13の外側鋼管11内への挿入作業を簡便に行うことができる。
[参考例2]
Further, as an effect on the reference example, since the spacers 18 are provided at the four positions on the front, rear, left and right in the length direction of the reinforcing member 12, the center of the reinforcing member 12 can be aligned with the outer steel pipe 11, Since the spacer 18 is made of a steel plate, it serves as a guide when the reinforcing member 12 is inserted into the outer steel pipe 11. Furthermore, since the upper end of the core member 13 is extended upward with respect to the first strip plate 16 and the second strip plate 17 and the through hole 211 is provided on the upper end side of the core member 13, the upper portion of the core member 13 is used. It is possible to simply suspend and suspend and insert the core material 13 into the outer steel pipe 11.
[Reference Example 2]

図22〜図24は、本発明の参考例2を上記参考例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。この例の芯材は、断面が前後方向に長い角型鋼管71からなり、この角型鋼管71の前後の側板部71A,71Aが左右板部であり、その角型鋼管71の前後の側板部71B,71Bが前後側板部である。そして、前後の側板部71Aに前記第1帯板16が点溶接などにより取り付けられている。また、前記左右の側板部71A,71Aに前記貫通孔212,212が穿設されている。尚、図23に示すように、角型鋼管71の内部にも充填材10を充填することが好ましい。   22 to 24, the second embodiment of the present invention will be described in detail with the same reference numerals assigned to the same parts as the first embodiment, and detailed description thereof omitted. The core material of this example is composed of a square steel pipe 71 having a long cross section in the front-rear direction. The front and rear side plate portions 71A and 71A of the square steel pipe 71 are left and right plate portions, and the front and rear side plate portions of the square steel pipe 71. 71B and 71B are front and rear side plate portions. The first band plate 16 is attached to the front and rear side plate portions 71A by spot welding or the like. The through holes 212 and 212 are formed in the left and right side plate portions 71A and 71A. As shown in FIG. 23, it is preferable to fill the filler 10 into the square steel pipe 71 as well.

また、前後の側板部71A,71Aは両側の第1帯板16を平行に配置するための位置決め部であり、強度上に必要性は低いから、その側板部71Aの幅Wは60mm以上であればよく、また、角型鋼管71の厚さは6mm以下でよい。   Further, the front and rear side plate portions 71A and 71A are positioning portions for arranging the first strips 16 on both sides in parallel, and since the necessity for strength is low, the width W of the side plate portion 71A should be 60 mm or more. The thickness of the square steel pipe 71 may be 6 mm or less.

本参考例の支柱5と、比較例として外径が鋼管の267.4mm、厚さが41.0mmの断面性能について検討した。角型鋼管71は、厚さが4.5mm、前後幅が125mm、左右幅は75mmであり、第1帯板16,第2帯板17及び外側補強部215は参考例1と同一である。   As a comparative example, the cross-sectional performance of an outer diameter of 267.4 mm of steel pipe and a thickness of 41.0 mm was examined as a comparative example. The square steel pipe 71 has a thickness of 4.5 mm, a front-rear width of 125 mm, and a left-right width of 75 mm. The first strip 16, the second strip 17, and the outer reinforcing portion 215 are the same as in the first reference example.

Figure 0006202113
Figure 0006202113

上記表2は、比較例として、外径が同一で、厚さが41mmの鋼管を例示したものである。両者は断面係数が同一であるが、重量は比較例が20%以上重たくなる。また、キロ当たりの加工費は実施品が高いが、材料費・メッキ代・運搬費が重量に比例するから、全体として、支柱の単価としては、比較例が実施品の1.79倍以上となる。尚、実施品では、前後の第1帯板16,16と第2帯板17,17により、断面係数の50%以上(約53%)を得ることができる。   Table 2 exemplifies a steel pipe having the same outer diameter and a thickness of 41 mm as a comparative example. Both have the same section modulus, but the weight of the comparative example is 20% or more heavier. In addition, the processing cost per kilometer is high for the implemented product, but since the material cost, plating fee, and transportation cost are proportional to the weight, as a whole, the unit price of the support is 1.79 times more than the implemented product as a unit price. Become. In the embodiment, 50% or more (about 53%) of the section modulus can be obtained by the front and rear first strip plates 16, 16 and the second strip plates 17, 17.

このように本参考例では、所定の間隔をおいて設けられた複数の支柱5と、支柱5間に設けた防護面たる網材7とを備えた防護柵において、支柱5は、管材たる外側鋼管11と、この外側鋼管11の内部に設けた補強材12と、外側鋼管11内に充填した充填材10を備え、補強材12は、前後方向の芯材たる角型鋼管71と、この角型鋼管71の前側及び後側に設けた左右方向の主補強板たる第1帯板16とを備え、芯材13は前後方向の前後板部たるウエブ部15と、このウエブ部15の両端部に設けた左右方向の左右板部たるフランジ部14とを備え、第1帯板16はフランジ部14より左右方向に幅広で且つ肉厚であるから、参考例1と同様な作用・効果を奏する。   As described above, in this reference example, in the protection fence including the plurality of support columns 5 provided at predetermined intervals and the net member 7 serving as a protection surface provided between the support columns 5, the support columns 5 are outside the tube material. A steel pipe 11, a reinforcing material 12 provided inside the outer steel pipe 11, and a filler 10 filled in the outer steel pipe 11 are provided. The reinforcing material 12 includes a square steel pipe 71 as a core material in the front-rear direction, A first strip 16 that is a main reinforcing plate in the left-right direction provided on the front side and the rear side of the shaped steel pipe 71, the core member 13 is a web portion 15 that is a front-rear plate portion in the front-rear direction, and both end portions of the web portion 15 Since the first strip 16 is wider and thicker in the left-right direction than the flange 14, the same operation and effect as in Reference Example 1 are achieved. .

また、このように本参考例では、芯材たる角型鋼管71は、前記前後方向の前後板部たる側板部71Aを左右に配置すると共に、これら側板部71A,71Aの両端部に左右方向の左右板部たる側板部71B,71Bをそれぞれ連結した強度的に優れた角形の角型鋼管71を芯材に用いることができる。   As described above, in this reference example, the square steel pipe 71 as the core material has the left and right side plate portions 71A as the front and rear plate portions arranged on the left and right sides, and the left and right sides of the side plate portions 71A and 71A in the left and right direction. A square steel pipe 71 having a superior strength in which the side plate portions 71B and 71B as the left and right plate portions are connected to each other can be used as a core material.

また、参考例上の効果として、角型鋼管71を設けることにより、同一高さ位置で左右の側板部71B,71Bに貫通孔212をそれぞれ形成し、それら貫通孔212,212に長ボルト213を挿入することにより、安定して吊り上げや位置決めを行うことができる。
[参考例3]
Further, as an effect on the reference example, by providing a square steel pipe 71, through holes 212 are formed in the left and right side plate portions 71B and 71B at the same height, and long bolts 213 are formed in the through holes 212 and 212, respectively. By inserting, stable lifting and positioning can be performed.
[Reference Example 3]

図25〜図28は、本発明の参考例3を上記各参考例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。この例の外側鋼管11Aは角型鋼管であり、この角型鋼管の四辺は等しく、角部が湾曲状に形成されている。   25 to 28, reference example 3 of the present invention will be described in detail with the same reference numerals assigned to the same parts as those of the above reference examples, and detailed description thereof omitted. The outer steel pipe 11A in this example is a square steel pipe, and the four sides of the square steel pipe are equal and the corners are curved.

また、この例の補強材12では、第2帯板17の幅W2は前記第1帯板16の幅W1より広く又は同一で、第2帯板17の厚さT2は第1帯板16の厚さT1と同等又は厚さT1より厚い。また、核型の外側鋼管11Aの内幅寸法Wに対して、幅W1は内幅寸法Wの0.93以上、幅W2は内径寸法Sの0.68以上、但し、W1<=W2である。また、厚さT1は6〜49mm、厚さT2は6〜36mmである。また、第1帯板16及び第2帯板17の外側角部が、外側鋼管11の内面に接しないように第1帯板16及び第2帯板17の寸法が設定されている。尚、補強材12は前後対象・左右対称である。また、好ましくは、第2帯板17の幅W2は前記第1帯板16の幅W1より広く、第2帯板17の厚さT2は第1帯板16の厚さT1より厚い。   Further, in the reinforcing member 12 of this example, the width W2 of the second strip 17 is wider than or equal to the width W1 of the first strip 16, and the thickness T2 of the second strip 17 is equal to that of the first strip 16. It is equal to or thicker than the thickness T1. Further, the width W1 is 0.93 or more of the inner width dimension W and the width W2 is 0.68 or more of the inner diameter dimension S with respect to the inner width dimension W of the core-type outer steel tube 11A, provided that W1 <= W2. . The thickness T1 is 6 to 49 mm, and the thickness T2 is 6 to 36 mm. The dimensions of the first strip 16 and the second strip 17 are set so that the outer corners of the first strip 16 and the second strip 17 do not contact the inner surface of the outer steel pipe 11. In addition, the reinforcing material 12 is a front / rear object and left / right symmetrical. Preferably, the width W2 of the second strip 17 is wider than the width W1 of the first strip 16, and the thickness T2 of the second strip 17 is thicker than the thickness T1 of the first strip 16.

補強材12には、その第2帯板17の外面にスペーサ18を設けている。このスペーサ18は鋼製の板材からなり、前後の第2帯板17の前面,後面に左右に間隔を置いて設けられている。また、図27に示すように、外補強部215は鋼製の平板からなり、外補強部215の左右の幅WGは前記第1帯板16の幅W1と略等しい。   The reinforcing member 12 is provided with a spacer 18 on the outer surface of the second strip 17. The spacer 18 is made of a steel plate, and is provided on the front and rear surfaces of the front and rear second strips 17 with a space left and right. As shown in FIG. 27, the outer reinforcing portion 215 is made of a steel flat plate, and the left and right widths WG of the outer reinforcing portion 215 are substantially equal to the width W1 of the first strip 16.

さらに、第1のキャップ取付用プレート19には、キャップ取付孔21Aが設けられ、第1のキャップ取付用プレート19上に第3のキャップ取付用プレート45が設置された状態で、支柱キャップ44が各支柱5の外側鋼管11の上部に外嵌し、第3のキャップ取付孔46とキャップ取付孔21Aにボルト(図示せず)を挿通し、このボルトにナットを螺合して、第1のキャップ取付用プレート19に第3のキャップ取付用プレート45を固定する。尚、参考例1と同様に第1のキャップ取付用プレート19と第2のキャップ取付用プレート20の間の取付ボルト47に、可動ブラケット48が水平方向に揺動自在に取り付けられている。   Further, the cap mounting hole 21A is provided in the first cap mounting plate 19, and the column cap 44 is installed in a state where the third cap mounting plate 45 is installed on the first cap mounting plate 19. It fits on the upper part of the outer steel pipe 11 of each support column 5, and a bolt (not shown) is inserted into the third cap mounting hole 46 and the cap mounting hole 21A. The third cap mounting plate 45 is fixed to the cap mounting plate 19. Similar to the first embodiment, a movable bracket 48 is attached to a mounting bolt 47 between the first cap mounting plate 19 and the second cap mounting plate 20 so as to be swingable in the horizontal direction.

このように本参考例では、所定の間隔をおいて設けられた複数の支柱5と、支柱5間に設けた防護面たる網材7とを備えた防護柵において、支柱5は、管材たる外側鋼管11Aと、この外側鋼管11Aの内部に設けた補強材12と、外側鋼管11A内に充填した充填材10を備え、補強材12は、前後方向の芯材13と、この芯材13の前側及び後側に設けた左右方向の主補強板たる第1帯板16とを備え、芯材13は前後方向の前後板部たるウエブ部15と、このウエブ部15の両端部に設けた左右方向の左右板部たるフランジ部14とを備え、第1帯板16はフランジ部14より左右方向に幅広で且つ肉厚であるから、参考例1と同様な作用・効果を奏する。   As described above, in this reference example, in the protection fence including the plurality of support columns 5 provided at predetermined intervals and the net member 7 serving as a protection surface provided between the support columns 5, the support columns 5 are outside the tube material. A steel pipe 11A, a reinforcing material 12 provided inside the outer steel pipe 11A, and a filler 10 filled in the outer steel pipe 11A are provided. The reinforcing material 12 includes a core material 13 in the front-rear direction and a front side of the core material 13 And a first strip 16 as a main reinforcing plate in the left-right direction provided on the rear side, and the core member 13 includes a web portion 15 as a front-rear plate portion in the front-rear direction, and a left-right direction provided at both ends of the web portion Since the first strip 16 is wider and thicker in the left-right direction than the flange 14, the same action and effect as in Reference Example 1 are achieved.

また、外側鋼管11Aが角型鋼管であるから、外側鋼管11Aの前後寸法を押えることができ、これによりコンクリート基礎に支柱8,9を立設する場合、コンクリート基礎の前後方向寸法を小さく抑えることができる。   In addition, since the outer steel pipe 11A is a square steel pipe, the front-rear dimension of the outer steel pipe 11A can be suppressed, so that when the columns 8, 9 are erected on the concrete foundation, the front-rear dimension of the concrete foundation is kept small. Can do.

また、参考例上の効果として、外側鋼管11Aが角型だから、外側に近い第2帯板17を内側の第1帯板16に比べた厚くすることにより、強度に優れたものなる。また、外補強部215は外側鋼管11Aに所定の取付強度を有するように固定しなければならないが、第2帯板17は充填材10により外側鋼管11Aに一体化されるから、芯材13との高い取付強度を要さないという製作上の利点がある。
[参考例4]
Further, as an effect on the reference example, since the outer steel pipe 11A is square, the second strip 17 closer to the outer side is made thicker than the inner first strip 16 so that the strength is excellent. The outer reinforcing portion 215 must be fixed to the outer steel pipe 11A so as to have a predetermined mounting strength. However, since the second strip 17 is integrated with the outer steel pipe 11A by the filler 10, There is an advantage in manufacturing that high mounting strength is not required.
[Reference Example 4]

図29〜図31は、本発明の参考例4を上記各参考例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。この例は、上記参考例3のH型鋼からなる芯材を、断面が前後方向に長い角型鋼管71に置き換えており、外側鋼管11Aが角型の場合でも上記各参考例と同様な作用・効果を奏する。
[参考例5]
29 to 31, reference example 4 of the present invention will be described in detail with the same reference numerals assigned to the same parts as those of the above reference examples, and detailed description thereof omitted. In this example, the core material made of the H-shaped steel of Reference Example 3 is replaced with a square steel pipe 71 having a long cross section in the front-rear direction, and even when the outer steel pipe 11A is a square type, There is an effect.
[Reference Example 5]

図32〜図33は、本発明の参考例5を上記各参考例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。この例の補強材12は、芯材13である前記角型鋼管71のみからなる。   32 to 33, reference example 5 of the present invention will be described in detail with the same reference numerals assigned to the same parts as those of the reference examples described above, and detailed description thereof omitted. The reinforcing member 12 in this example is composed only of the square steel pipe 71 which is the core member 13.

このように応力的に第1帯板,第2帯板及び外補強部を取り付ける必要がなければ、外側鋼管11Aと内部の角型鋼管71のみの多重角型鋼管合成支柱により防護体の支柱8,9を構成することができ、本参考例では、二重管を例示したが、外側鋼管11Aと角型鋼管71の間に中間の角型鋼管を配置した三重管でもよい。   Thus, if it is not necessary to attach the first strip, the second strip and the outer reinforcing portion in stress, the support column 8 of the protective body is formed by the multi-angle steel tube composite support column of only the outer steel tube 11A and the inner square steel tube 71. , 9 can be configured. In this reference example, the double pipe is exemplified, but a triple pipe in which an intermediate square steel pipe is disposed between the outer steel pipe 11A and the square steel pipe 71 may be used.

図34〜図43は、本発明の実施例1を上記各参考例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。この例の支柱8,9は、断面円形又は断面角型の三重管からなる。   34 to 43, the first embodiment of the present invention will be described in detail with the same reference numerals assigned to the same parts as those of the above-described reference examples, and detailed description thereof omitted. The struts 8 and 9 in this example are triple tubes having a circular cross section or a square cross section.

図35に示すように、それら支柱8,9は、外側管たる大径管81と、この大径管81内に挿入される中径管82と、この中径管82内に挿入される小径管83とを備え、前記設置面1Aに立設される。また、中径管82は大径管81及び小径管83より短く、中径管82と小径管83は下端位置を略合わせて配置され、それら中径管82と小径管83の下端位置より大径管81の下端は下方に延設され、その大径管81と小径管83の上端位置は略同一である。   As shown in FIG. 35, the support columns 8 and 9 are composed of a large-diameter pipe 81 as an outer pipe, a medium-diameter pipe 82 inserted into the large-diameter pipe 81, and a small-diameter inserted into the medium-diameter pipe 82. A pipe 83, and is erected on the installation surface 1A. Further, the medium diameter pipe 82 is shorter than the large diameter pipe 81 and the small diameter pipe 83, and the medium diameter pipe 82 and the small diameter pipe 83 are arranged with their lower end positions substantially aligned, and are larger than the lower end positions of the medium diameter pipe 82 and the small diameter pipe 83. The lower end of the diameter pipe 81 extends downward, and the upper end positions of the large diameter pipe 81 and the small diameter pipe 83 are substantially the same.

コンクリート基礎を用いない杭式構造の支柱では、設置面1Aの位置より下方の地中部分が長くなり、支柱が全体として長くなる場合がある。これに対して、支柱を構成する部材は車両運搬時や現場搬入時などに長さの制限があり、トレーラーを用いた場合の最長積載長さは例えば12m程度であり、この寸法を超えると、現場で接合する必要がある。   In a pillar-type strut that does not use a concrete foundation, the underground part below the position of the installation surface 1A becomes longer, and the strut may become longer as a whole. On the other hand, the length of the member constituting the column is limited when the vehicle is transported or when it is carried on the site, and the maximum loading length when using a trailer is about 12 m, for example. It is necessary to join on site.

そこで、本実施例では、支柱8,9は、その大径管81の下端に下延長部を設けるように構成しており、以下、その構成について説明する。   Therefore, in this embodiment, the support columns 8 and 9 are configured to provide a lower extension at the lower end of the large-diameter pipe 81, and the configuration will be described below.

図35に示すように、この例では、前記下延長部は、前記中径管82と同径・同厚の管材84からなる。図36などに示すように、大径管81の下部には、その長さ方向に一定間隔を置いて、左右方向の貫通孔85,85を複数個所設け、この例では大径管81の長さ方向に3箇所の貫通孔85を設けている。また、前記管材84の上部には前記貫通孔85,85,85に対応して貫通孔86,86,86を穿設している。尚、貫通孔85,86はそれぞれ管の直径を通って左右両側に形成されている。   As shown in FIG. 35, in this example, the lower extension portion is made of a tube material 84 having the same diameter and the same thickness as the medium diameter tube 82. As shown in FIG. 36 and the like, a plurality of through-holes 85, 85 in the left-right direction are provided at a lower portion of the large-diameter pipe 81 at regular intervals in the length direction. Three through holes 85 are provided in the vertical direction. Further, through holes 86, 86, 86 are formed in the upper portion of the pipe member 84 so as to correspond to the through holes 85, 85, 85. The through holes 85 and 86 are formed on both the left and right sides through the diameter of the tube.

さらに、連結手段として長ボルト87とナット88とを用い、その長ボルト87を貫通孔85,86に挿通し、長ボルト87の先端に2個のナット88,88を螺合することにより、大径管81の下端に管材84を連結している。また、大径管81の下端に対応して、前記管材84には鍔部84Fが設けられ、連結状態で、鍔部84Fが大径管81の下端81Kに当接し、大径管81の内周面と中径管82の外周面との間の隙間を該鍔部84Fが塞いでいる。   Further, a long bolt 87 and a nut 88 are used as connecting means, the long bolt 87 is inserted into the through holes 85 and 86, and the two nuts 88 and 88 are screwed to the tip of the long bolt 87, so that A pipe 84 is connected to the lower end of the diameter pipe 81. Further, the tube member 84 is provided with a flange portion 84F corresponding to the lower end of the large diameter tube 81, and in the connected state, the flange portion 84F abuts on the lower end 81K of the large diameter tube 81, The flange 84F closes the gap between the peripheral surface and the outer peripheral surface of the medium diameter tube 82.

また、小径管83の上部には、吊下げ手段たるフラットバー89を小径管83の直径方向に固定する。図37に示すように、フラットバー89の長さは大径管81の内径寸法より短く、そのフラットバー89の両端が大径管81の内面に近接することにより、フラットバー89はスペーサの役割をなす。また、大径管81の上部には、前後方向の貫通孔91,91を設け、この貫通孔91,91に対応して、前記小径管83に前後方向の貫通孔92,92を設けている。そして、前記長ボルト87を前記貫通孔91,92に挿通し、長ボルト87の先端に2個のナット88,88を螺合することにより、大径管81の上部に小径管83の上部とが連結固定される。   Further, a flat bar 89 as a suspension means is fixed to the upper portion of the small diameter tube 83 in the diameter direction of the small diameter tube 83. As shown in FIG. 37, the length of the flat bar 89 is shorter than the inner diameter dimension of the large-diameter pipe 81, and both ends of the flat bar 89 are close to the inner surface of the large-diameter pipe 81. Make. Further, in the upper part of the large-diameter pipe 81, through-holes 91, 91 in the front-rear direction are provided, and through-holes 92, 92 in the front-rear direction are provided in the small-diameter pipe 83 corresponding to the through-holes 91, 91. . Then, the long bolt 87 is inserted into the through holes 91 and 92, and two nuts 88 and 88 are screwed onto the tip of the long bolt 87, so that the upper portion of the small diameter tube 83 and the upper portion of the large diameter tube 81 are connected. Is fixedly connected.

さらに、図35及び図40に示すように、小径管83の長さ方向中央には、スペーサ93,93,93,93が円周方向等間隔に4箇所設けられ、それらスペーサ93,93,93,93は、鋼製の板片からなり、中径管82の内面に当接又は近接して該中径管82の中心に小径管83の中心を合わせるように位置決めされる。   Further, as shown in FIGS. 35 and 40, four spacers 93, 93, 93, 93 are provided at equal intervals in the circumferential direction at the center in the length direction of the small diameter pipe 83. , 93 are made of steel plate pieces, and are positioned so as to be in contact with or close to the inner surface of the medium diameter tube 82 and to align the center of the small diameter tube 83 with the center of the medium diameter tube 82.

また、図36などに示すように、管材84には、スペーサ94,94,94,94が円周方向等間隔に複数(4箇所)設けられている。それらスペーサ94,94,94,94は、鋼製の板片からなり、大径管81の内面に当接して該大径管81の中心に管材84の中心を合わせるように位置決めされる。尚、図36に示すように、管材84の大径管81に挿入した部分の上側及び下側にスペーサ94がそれぞれ設けられて位置決めされている。   Also, as shown in FIG. 36 and the like, the pipe member 84 is provided with a plurality (four places) of spacers 94, 94, 94, 94 at equal intervals in the circumferential direction. These spacers 94, 94, 94, 94 are made of steel plate pieces, and are positioned so as to contact the inner surface of the large diameter pipe 81 and to align the center of the pipe member 84 with the center of the large diameter pipe 81. As shown in FIG. 36, spacers 94 are respectively provided and positioned on the upper side and the lower side of the portion inserted into the large-diameter pipe 81 of the pipe member 84.

図41〜図43に示すように、小径管83の下端には、上向き係止部たる係止突起95,95,95,95が円周方向等間隔に複数(4箇所)設けられている。それら係止突起95,95,95,95は、鋼製の略三角形状の板片からなり、外側に向って低くなる傾斜の上傾斜部95Kを有し、この上傾斜部95Kが中径管82の下端に係止し、これにより小径管83の下端に小径管83の下端が位置決めされる。また、係止突起95の外端が大径管81の内面に当接又は近接して該大径管81の中心に小径管83の中心を合わせるように位置決めされる。   As shown in FIGS. 41 to 43, a plurality of (four places) locking projections 95, 95, 95, 95, which are upward locking portions, are provided at equal intervals in the circumferential direction at the lower end of the small-diameter pipe 83. Each of the locking projections 95, 95, 95, 95 is made of a substantially triangular plate piece made of steel, and has an upper inclined portion 95K that is inclined downward, and the upper inclined portion 95K is a medium diameter tube. The lower end of the small-diameter pipe 83 is positioned at the lower end of the small-diameter pipe 83. Further, the locking projection 95 is positioned so that the outer end of the locking projection 95 is in contact with or close to the inner surface of the large diameter tube 81 and the center of the small diameter tube 83 is aligned with the center of the large diameter tube 81.

尚、この例では、大径管81,中径管82,小径管83及び管材84は断面円形の鋼管であるが、角型鋼管を用いてもよい。   In this example, the large-diameter pipe 81, the medium-diameter pipe 82, the small-diameter pipe 83, and the pipe member 84 are steel pipes having a circular cross section, but square steel pipes may be used.

次に、前記防護柵の施工方法につき、支柱の施工を中心にして説明する。設置面1Aに大径管81の下部及び管材84を挿入する掘削孔65を掘削し、大径管81の下部に管材84の上部を挿入し、図36に示したように、両者を連結手段である長ボルト87とナット88により連結する。これにより大径管81の長さを延長することができ、この管材84の下部からなる延長部分は支柱8,9の最低部に位置するから、加わる応力も他に比べて小さく、大径管81に比べて小径で肉薄な管材84を用いることができる。   Next, the construction method of the protective fence will be described focusing on the construction of the support. A drilling hole 65 for inserting the lower part of the large-diameter pipe 81 and the pipe material 84 is excavated on the installation surface 1A, and the upper part of the pipe member 84 is inserted into the lower part of the large-diameter pipe 81. As shown in FIG. The long bolt 87 and the nut 88 are connected. As a result, the length of the large-diameter pipe 81 can be extended, and since the extension portion consisting of the lower portion of the pipe material 84 is located at the lowest part of the support columns 8 and 9, the applied stress is also smaller than the others, and the large-diameter pipe 81 Compared to 81, a thin tube material 84 having a small diameter can be used.

大径管81の下部に管材84を掘削孔65に挿入し、この掘削孔65にモルタルなどの充填材を充填して大径管81を固定する。   A pipe 84 is inserted into the drilling hole 65 below the large-diameter pipe 81, and the large-diameter pipe 81 is fixed by filling the drilling hole 65 with a filler such as mortar.

一方、中径管82の下部から小径管83を挿入すると、スペーサ93により中径管82と小径管83とが位置合わせされる。また、図43に示すように、係止突起95が中径管82の下端に形成し、フラットバー89を用いて中径管82と小径管83とを吊り上げることができ、中径管82と小径管83の下部を大径管81の上部から挿入して吊り下ろし、図38に示すように、貫通孔91,92を位置合わせした状態で、貫通孔91,92に長ボルト87を挿入して大径管81に小径管83を固定する。   On the other hand, when the small-diameter pipe 83 is inserted from the lower part of the medium-diameter pipe 82, the medium-diameter pipe 82 and the small-diameter pipe 83 are aligned by the spacer 93. As shown in FIG. 43, a locking projection 95 is formed at the lower end of the medium diameter pipe 82, and the medium diameter pipe 82 and the small diameter pipe 83 can be lifted using the flat bar 89. The lower part of the small-diameter pipe 83 is inserted and suspended from the upper part of the large-diameter pipe 81, and the long bolt 87 is inserted into the through-holes 91 and 92 with the through-holes 91 and 92 aligned as shown in FIG. The small diameter pipe 83 is fixed to the large diameter pipe 81.

この後、大径管81,中径管82及び小径管83内に充填材10を充填し、これら三者を一体化する。   Thereafter, the large diameter pipe 81, the medium diameter pipe 82 and the small diameter pipe 83 are filled with the filler 10, and these three are integrated.

このように本実施例では、請求項に対応して、所定の間隔をおいて設けられ内部に充填材10が充填された複数の支柱5と、支柱5間に設けた防護面たる網材7とを備えた防護柵において、支柱5は、大径管81と、この大径管81内に挿入される中径管82と、この中径管82内に挿入される小径管83とを備え、設置面1Aに立設され、設置面1Aの上下に大径管81と中径管82と小径管83が位置し、大径管81の地中下端に連結され中径管82と同径の管材84と、それら大径管81と管材84とを連結する連結手段たる長ボルト87とを備え、大径管81の下部に管材84の上部が挿入された状態で、長ボルト87により大径管81と管材84とが連結され、管材84の外周面の大径管81に挿入した部分にスペーサ94が設けられ、スペーサ94により大径管81の中心と管材84の中心が位置決めされ、管材84には鍔部84Fが設けられ、鍔部84Fが大径管81の下端81Kに当接し、大径管81の内周面と管材84の外周面との間の隙間が鍔部84Fにより塞がれ、大径管81の下端81K位置から管材84の下端が下方に延設されているから、施工条件などにより長尺な大径管81を現場に搬入できない場合、現場で大径管81に管材84を連結して大径管81を延長することができる。 Thus, in this embodiment, corresponding to claim 3 , a plurality of support columns 5 provided at predetermined intervals and filled with a filler 10 inside, and a mesh material as a protective surface provided between the support columns 5 7, the support column 5 includes a large-diameter pipe 81, a medium-diameter pipe 82 inserted into the large-diameter pipe 81, and a small-diameter pipe 83 inserted into the medium-diameter pipe 82. It includes, erected on the installation surface 1A, vertically positioned the medium diameter pipes 82 and the small diameter tube 83 and large diameter tube 81 of the mounting surface 1A, and diameter tube 82 in connected to ground lower end of the large-diameter tube 81 the the diameter of the tube 84, and a connecting means Chief bolts 87 for connecting with their large-diameter pipe 81 and the tubing 84, in a state where the upper is inserted in the tubing 84 to the bottom of the large-diameter tube 81, the long bolts 87 The large-diameter pipe 81 and the pipe material 84 are connected to each other, and a spacer 94 is provided at a portion inserted into the large-diameter pipe 81 on the outer peripheral surface of the pipe material 84. The center of the large-diameter pipe 81 and the center of the pipe material 84 are positioned by the spacer 94. The tube 84 is provided with a flange 84F, the flange 84F contacts the lower end 81K of the large diameter pipe 81, and the gap between the inner peripheral surface of the large diameter tube 81 and the outer peripheral surface of the tube 84 is the flange. Since it is blocked by 84F and the lower end of the pipe 84 is extended downward from the position of the lower end 81K of the large diameter pipe 81, if the long large diameter pipe 81 cannot be brought into the site due to construction conditions, etc. The large diameter pipe 81 can be extended by connecting the pipe 84 to the diameter pipe 81.

このように本実施例では、請求項に対応して、外側管が大径管81であり、支柱5は、大径管81と、この大径管81内に挿入される中径管82と、この中径管内に挿入される小径管83とを備え、設置面1Aの上下に大径管81と中径管82と小径管83が位置するから、大径管81と中径管82と小径管83とより設置面1Aの上下が三重となった支柱5を構築できる。 Thus, in this embodiment, corresponding to the third aspect , the outer tube is the large-diameter tube 81, and the support column 5 includes the large-diameter tube 81 and the medium-diameter tube 82 inserted into the large-diameter tube 81. And the small-diameter pipe 83 inserted into the medium-diameter pipe, and the large-diameter pipe 81, the medium-diameter pipe 82, and the small-diameter pipe 83 are positioned above and below the installation surface 1A. Thus, it is possible to construct the column 5 in which the upper and lower sides of the installation surface 1A are tripled by the small diameter pipe 83.

このように本実施例では、請求項に対応して、管材84には鍔部84Fが設けられ、大径管81と管材84を連結した状態で、鍔部84Fが外側管たる大径管81の下端に当接し、大径管81の内周面と管材84の外周面との間の隙間を鍔部84Fが塞ぎ、鍔部84Fが大径管81の下端81Kに当接し、大径管81の内周面と中径管82の外周面との間の隙間を該鍔部84Fが塞いでいるから、充填材10が漏れ出すことがない。 Thus, in this embodiment, in correspondence with claim 3 , the tube 84 is provided with the flange 84F, and the large diameter tube 81F is the outer tube with the flange 84F being connected to the large diameter tube 81 and the tube 84. The flange 84F is in contact with the lower end of 81, the gap between the inner peripheral surface of the large-diameter pipe 81 and the outer peripheral surface of the tube 84 is closed by the flange 84F, and the flange 84F is in contact with the lower end 81K of the large-diameter pipe 81. Since the flange portion 84F closes the gap between the inner peripheral surface of the pipe 81 and the outer peripheral surface of the medium diameter pipe 82, the filler 10 does not leak out.

また、実施例上の効果として、小径管83の下端に係止突起95に、この上傾斜部95Kが中径管82の下端に係止するから、小径管83の下端に小径管83の下端が位置決めされ、また、係止突起95の外端が大径管81の内面に当接又は近接して該大径管81の中心に小径管83の中心を合わせるように位置決めされる。   Further, as an effect of the embodiment, the lower projection of the small diameter pipe 83 is engaged with the lower end of the small diameter pipe 83 and the upper inclined portion 95K is engaged with the lower end of the medium diameter pipe 82. In addition, the outer end of the locking projection 95 is positioned so that the center of the small-diameter pipe 83 is aligned with the center of the large-diameter pipe 81 in contact with or close to the inner surface of the large-diameter pipe 81.

図44〜図51は、本発明の実施例2を上記各参考例及び実施例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。この例の支柱8,9は、断面円形又は断面角型の三重管からなる。   44 to 51, the second embodiment of the present invention will be described in detail by assigning the same reference numerals to the same portions as those of the reference examples and embodiments described above, and omitting the detailed description thereof. The struts 8 and 9 in this example are triple tubes having a circular cross section or a square cross section.

図45に示すように、それら支柱8,9は、大径管81と、この大径管81内に挿入される中径管82と、この中径管82内に挿入される小径管83とを備え、前記設置面1Aに立設される。また、小径管83は大径管81より長く、小径管83と大径管81の上端位置を略合わせて配置され、中径管82は大径管81及び小径管83の下端から下方に延設されている。さらに、小径管83の下端は大径管81より下方に位置する。   As shown in FIG. 45, the support columns 8 and 9 include a large-diameter tube 81, a medium-diameter tube 82 inserted into the large-diameter tube 81, and a small-diameter tube 83 inserted into the medium-diameter tube 82. And is erected on the installation surface 1A. The small-diameter pipe 83 is longer than the large-diameter pipe 81 and is arranged so that the upper end positions of the small-diameter pipe 83 and the large-diameter pipe 81 are substantially aligned, and the medium-diameter pipe 82 extends downward from the lower ends of the large-diameter pipe 81 and the small-diameter pipe 83. It is installed. Further, the lower end of the small diameter pipe 83 is positioned below the large diameter pipe 81.

そして、設置面1Aの上下において大径管81,中径管82及び小径管83が位置する。尚、この例では、大径管81,中径管82及び小径管83の外径は、89.1mm以下,60.5mm以下,48.6mm以下である。   The large diameter pipe 81, the medium diameter pipe 82, and the small diameter pipe 83 are positioned above and below the installation surface 1A. In this example, the outer diameters of the large diameter pipe 81, the medium diameter pipe 82, and the small diameter pipe 83 are 89.1 mm or less, 60.5 mm or less, and 48.6 mm or less.

大径管81,中径管82及び小径管83の重複部分には、左右方向の貫通孔101,102,103を複数設け、この例では大径管81の長さ方向に間隔を置いて2箇所の貫通孔101,102,103を設けている。尚、貫通孔101,102,103はそれぞれ管の直径を通って左右両側に形成されている。   A plurality of left and right through holes 101, 102, 103 are provided in the overlapping portion of the large diameter pipe 81, the medium diameter pipe 82, and the small diameter pipe 83. In this example, the large diameter pipe 81 is spaced 2 in the longitudinal direction. The through-holes 101, 102, and 103 are provided at locations. The through holes 101, 102, 103 are formed on the left and right sides respectively through the diameter of the tube.

さらに、連結手段として前記長ボルト87とナット88とを用い、その長ボルト87を貫通孔101,102,103に挿通し、長ボルト87の先端に2個のナット88,88を螺合することにより、大径管81,中径管82及び小径管83を連結している。また、大径管81の下端に対応して、前記中径管82には鍔部82Fが設けられ、連結状態で、鍔部82Fが大径管81の下端81Kに当接し、大径管81の内周面と中径管82の外周面との間の隙間を該鍔部82Fが塞いでいる。尚、鍔部82Fは大径管81の下端に設けてもよい。また、図中83Kは小径管83の下端、82Jは中径管82の上端である。   Further, the long bolt 87 and the nut 88 are used as connecting means, the long bolt 87 is inserted into the through holes 101, 102, 103, and the two nuts 88, 88 are screwed to the tip of the long bolt 87. Thus, the large diameter pipe 81, the medium diameter pipe 82 and the small diameter pipe 83 are connected. Corresponding to the lower end of the large diameter pipe 81, the intermediate diameter pipe 82 is provided with a flange portion 82F, and in the connected state, the flange portion 82F abuts against the lower end 81K of the large diameter tube 81, The flange portion 82F closes the gap between the inner peripheral surface of the tube and the outer peripheral surface of the medium diameter tube 82. The flange portion 82F may be provided at the lower end of the large diameter pipe 81. In the figure, 83K is the lower end of the small diameter pipe 83, and 82J is the upper end of the medium diameter pipe 82.

また、小径管83の上部には、吊下げ手段兼スペーサである前記フラットバー89を小径管83の直径方向に固定する。   Further, the flat bar 89 as a suspension means / spacer is fixed to the upper portion of the small diameter tube 83 in the diameter direction of the small diameter tube 83.

さらに、図45に示すように、小径管83の長さ方向中央には、ストッパ片105,105,105,105が円周方向等間隔に4箇所設けられ、それらストッパ片105,105,105,105は、鋼製の板片からなり、中径管82の上端に当接して中径管82に対する小径管83の高さが位置決めされる。   Furthermore, as shown in FIG. 45, at the center in the length direction of the small diameter tube 83, four stopper pieces 105, 105, 105, 105 are provided at equal intervals in the circumferential direction, and these stopper pieces 105, 105, 105, 105 is made of a steel plate piece and abuts on the upper end of the medium diameter pipe 82 so that the height of the small diameter pipe 83 relative to the medium diameter pipe 82 is positioned.

また、中径管82の上部外面には、前記スペーサ94,94,94,94が円周方向等間隔に複数(4箇所)設けられている。それらスペーサ94,94,94,94は、鋼製の板片からなり、大径管81の内面に当接して該大径管81の中心に中径管82の中心を合わせるように位置決めされる。   Further, a plurality (four places) of the spacers 94, 94, 94, 94 are provided at equal intervals in the circumferential direction on the upper outer surface of the medium diameter pipe 82. The spacers 94, 94, 94, 94 are made of steel plate pieces, and are positioned so as to contact the inner surface of the large-diameter pipe 81 and align the center of the medium-diameter pipe 82 with the center of the large-diameter pipe 81. .

尚、図45に示すように、中径管82の下部に掘削用のビット106を取り付けて塞いだり、図46に示すように、中径管82の下部を蓋体107により塞いだりしてもよい。
また、この例では、大径管81,中径管82,小径管83及び管材84は断面円形の鋼管であるが、角型鋼管を用いてもよい。
As shown in FIG. 45, the excavation bit 106 is attached and closed at the lower part of the intermediate diameter pipe 82, or the lower part of the intermediate diameter pipe 82 is closed by the lid 107 as shown in FIG. Good.
In this example, the large-diameter pipe 81, the medium-diameter pipe 82, the small-diameter pipe 83, and the pipe material 84 are steel pipes having a circular cross section, but square steel pipes may be used.

次に、前記防護柵の施工方法につき、支柱の施工を中心にして説明する。設置面1Aに中径管82の下部を挿入する掘削孔65を掘削し、中径管82の下部を挿入して仮固定する。この場合、地上で連結作業ができるように貫通孔102を設置面1Aより上にした状態で仮固定する。この仮固定の方法としては、中径管82の外面を挟持した支持具を設置面1Aに載置して中径管82を保持するなどして行う。   Next, the construction method of the protective fence will be described focusing on the construction of the support. The excavation hole 65 for inserting the lower part of the medium diameter pipe 82 is excavated on the installation surface 1A, and the lower part of the medium diameter pipe 82 is inserted and temporarily fixed. In this case, the through hole 102 is temporarily fixed in a state where it is above the installation surface 1A so that the connection work can be performed on the ground. As the temporary fixing method, a support tool that sandwiches the outer surface of the medium diameter tube 82 is placed on the installation surface 1A and the medium diameter tube 82 is held.

この後、フラットバー89を用いて小径管83を吊り上げ、小径管83を中径管82の上部から挿入して吊り下ろすと、ストッパ片105が中径管82の上端に当接し、中径管82に対して小径管83の高さ位置が決まり、それぞれの貫通孔102,103の高さ位置が合わされる。   Thereafter, when the small diameter pipe 83 is lifted using the flat bar 89, and the small diameter pipe 83 is inserted from the upper part of the medium diameter pipe 82 and suspended, the stopper piece 105 comes into contact with the upper end of the medium diameter pipe 82, and the medium diameter pipe 82 The height position of the small diameter pipe 83 is determined with respect to 82, and the height positions of the respective through holes 102 and 103 are matched.

さらに、大径管81を吊り上げ、大径管81を吊り下ろして小径管83と中径管82に外装し、前記中径管82の鍔部82Fに大径管81の下端が当接することにより、中径管82に対して大径管81の高さ位置が決まり、それぞれの貫通孔101,102,103の高さ位置が合わされる。この後、貫通孔101,102,103に長ボルト87を挿入し、ナット88,88を螺合して、大径管81と中径管82と小径管83を長さ方向に連結一体化する。尚、スペーサ93,94などの作用は上記参考例及び実施例と同様である。   Further, the large-diameter pipe 81 is lifted, the large-diameter pipe 81 is hung and covered with the small-diameter pipe 83 and the medium-diameter pipe 82, and the lower end of the large-diameter pipe 81 comes into contact with the flange portion 82F of the medium-diameter pipe 82 The height position of the large diameter pipe 81 is determined with respect to the medium diameter pipe 82, and the height positions of the respective through holes 101, 102, 103 are matched. Thereafter, long bolts 87 are inserted into the through holes 101, 102, 103, and nuts 88, 88 are screwed together so that the large diameter pipe 81, the medium diameter pipe 82, and the small diameter pipe 83 are connected and integrated in the length direction. . The actions of the spacers 93, 94 and the like are the same as those in the above reference example and example.

前記連結一体化の後、仮固定を解除して支柱8,9を所定深さまで地中に押し込み、掘削孔65に充填材を充填して支柱8,9を固定し、また、支柱8,9内に充填材10を充填し、この充填材10が硬化することにより、大径管81と中径管82と小径管83が一体化され、設置面1Aの上下に渡って、大径管81と中径管82と小径管83が重複した三重管部分が形成される。   After the connection and integration, temporary fixing is released and the columns 8 and 9 are pushed into the ground to a predetermined depth, the excavation hole 65 is filled with a filler to fix the columns 8 and 9, and the columns 8 and 9 are fixed. When the filler 10 is filled therein and the filler 10 is cured, the large-diameter pipe 81, the medium-diameter pipe 82, and the small-diameter pipe 83 are integrated, and the large-diameter pipe 81 extends over the installation surface 1A. As a result, a triple pipe portion in which the medium diameter pipe 82 and the small diameter pipe 83 overlap is formed.

このように本実施例では、請求項1に対応して、所定の間隔をおいて設けられ内部に充填材10が充填された複数の支柱5と、支柱5間に設けた防護面たる網材7とを備えた防護柵において、支柱5は、大径管81と、この大径管81内に挿入される中径管82と、この中径管82内に挿入される小径管83とを備え、設置面1Aに立設され、設置面1Aの上下に大径管81と中径管82と小径管83が位置し、中径管82には鍔部82Fが設けられ、鍔部82Fが大径管81の下端81Kに当接し、大径管81の内周面と中径管82の外周面との間の隙間が鍔部82Fにより塞がれ、連結手段たる長ボルト87とナット88により大径管81と中径管82と小径管83とが連結され、小径管83の下端は大径管81の下端81Kより下方に位置し、大径管81の下端81K位置から中径管82の下端が下方に延設されているから、設置面1A下方の地中への建て込み部分は、主として大径管81より小径な中径管82で済むため、施工が容易となり、現場で、大径管81と中径管82と小径管83とより設置面1Aの上下が三重となった支柱5を構築できる。また、支柱5を分割して軽量化し、人力運搬・施工によりどんな場所でも簡単に杭式防護柵を設置することができる。 Thus, in this embodiment, corresponding to claim 1, a plurality of support columns 5 provided at predetermined intervals and filled with a filler 10 inside, and a net member as a protective surface provided between the support columns 5. 7, the support column 5 includes a large-diameter pipe 81, a medium-diameter pipe 82 inserted into the large-diameter pipe 81, and a small-diameter pipe 83 inserted into the medium-diameter pipe 82. The large-diameter pipe 81, the medium-diameter pipe 82, and the small-diameter pipe 83 are positioned above and below the installation surface 1A. The intermediate-diameter pipe 82 is provided with a flange portion 82F. Abutting the lower end 81K of the large-diameter pipe 81, the gap between the inner peripheral surface of the large-diameter pipe 81 and the outer peripheral surface of the medium-diameter pipe 82 is closed by the flange 82F, and a long bolt 87 and a nut 88 serving as connection means The large-diameter pipe 81, the medium-diameter pipe 82, and the small-diameter pipe 83 are connected to each other, and the lower end of the small-diameter pipe 83 is located below the lower end 81K of the large-diameter pipe 81. The lower end of 82 extends downward Therefore, since the installation part into the ground below the installation surface 1A is mainly the medium diameter pipe 82 smaller in diameter than the large diameter pipe 81, the construction becomes easy, and the large diameter pipe 81 and the medium diameter pipe 82 It is possible to construct the column 5 in which the upper and lower sides of the installation surface 1A are tripled from the small diameter pipe 83. Moreover, the pillar 5 can be divided and reduced in weight, and a pile-type protective fence can be easily installed at any place by manual transportation and construction.

このように本実施例では、請求項に対応して、小径管83の外面に複数のストッパ片105を設け、これら複数のストッパ片105を中径管82の上端に当接して中径管82に対する小径管83の高さ位置決めされ、好ましくはストッパ片105を円周方向等間隔に複数個所(好ましくは3箇所以上)設けたから、中径管82と大径管81とを位置あわせすることができる。 Medium Thus, in this embodiment, corresponding to claim 2, a plurality of stopper pieces 105 on the outer circumferential surface of the small diameter tube 83, abuts a plurality of stopper piece 105 to the upper end of the middle diameter tube 82 The height of the small-diameter pipe 83 relative to the radial pipe 82 is positioned, and preferably, the stopper pieces 105 are provided at a plurality of positions (preferably three or more) at equal intervals in the circumferential direction, so that the medium-diameter pipe 82 and the large-diameter pipe 81 are positioned. Can be combined.

このように本実施例では、請求項に対応して、中径管82には鍔部82Fが設けられ、大径管81と中径管82を連結した状態で、鍔部82Fが大径管81の下端に当接し、大径管81の内周面と中径管82の外周面との間の隙間を鍔部82Fが塞ぐから、充填材10が漏れ出すことがない。 Thus, in the present embodiment, corresponding to claim 1 , the intermediate diameter tube 82 is provided with the flange portion 82F, and the flange portion 82F has a large diameter in a state where the large diameter tube 81 and the intermediate diameter tube 82 are connected. Since the flange 82F closes the gap between the inner peripheral surface of the large-diameter tube 81 and the outer peripheral surface of the medium-diameter tube 82, the filler 10 does not leak out.

図52は、本発明の実施例3を上記各参考例及び実施例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。この例では、設置面1Aには支柱位置に対応して擂り鉢型の開削孔101を形成し、この開削孔101は底面101Aから設置面位置にある上面101Bに向ってテーパー状に拡大形成されており、その底面101Aから下方に向って前記掘削孔65が形成されている。尚、開削孔101の深さは、中径管82の地中部分の長さに略等しい。   52, the third embodiment of the present invention will be described in detail with the same reference numerals assigned to the same parts as those of the reference examples and the embodiments described above, and detailed description thereof omitted. In this example, a bowl-shaped excavation hole 101 is formed on the installation surface 1A corresponding to the position of the support column, and the excavation hole 101 is enlarged and formed in a taper shape from the bottom surface 101A toward the upper surface 101B at the installation surface position. The excavation hole 65 is formed downward from the bottom surface 101A. The depth of the cut hole 101 is substantially equal to the length of the underground portion of the medium diameter pipe 82.

そして、一例として、中径管82が挿入可能な掘削孔65を形成した後、掘削孔65に中径管82を挿入し、掘削孔65に充填材を充填し、中径管82の下部を地中に固定する。また、他の例として、中径管82の下部に前記ビット106を設け、中径管82を回転しながら押し込んで地中に固定する。この場合もビット106が形成した掘削孔に充填材を充填してもよい。   As an example, after forming the excavation hole 65 into which the medium diameter pipe 82 can be inserted, the medium diameter pipe 82 is inserted into the excavation hole 65, the filling material is filled into the excavation hole 65, and the lower portion of the medium diameter pipe 82 is formed. Secure in the ground. As another example, the bit 106 is provided in the lower part of the medium diameter pipe 82, and the medium diameter pipe 82 is pushed in while rotating and fixed in the ground. In this case as well, the filler may be filled in the excavation hole formed by the bit 106.

いずれの場合も、中径管82を固定した後、実施例2と同様にして、中径管82内に小径管83を挿入し、これら中径管82と小径管83に大径管81を外装し、連結手段である長ボルト87とナット88により大径管81と中径管82と小径管83とを長さ方向に連結一体化した後、大径管81と中径管82と小径管83の内部に充填材10を充填する。   In either case, after fixing the medium diameter pipe 82, the small diameter pipe 83 is inserted into the medium diameter pipe 82 in the same manner as in the second embodiment, and the large diameter pipe 81 is inserted into the medium diameter pipe 82 and the small diameter pipe 83. After covering and integrating the large diameter pipe 81, the medium diameter pipe 82 and the small diameter pipe 83 in the length direction with the long bolt 87 and the nut 88 which are connection means, the large diameter pipe 81, the medium diameter pipe 82 and the small diameter The inside of the tube 83 is filled with the filler 10.

また、大径管81と中径管82と小径管83とを長さ方向に連結一体化した後、開削孔101にモルタルなどの硬化性材料を充填して埋め戻し、開削孔101のモルタルが硬化して基礎部が形成される。   After the large diameter pipe 81, the medium diameter pipe 82 and the small diameter pipe 83 are connected and integrated in the length direction, the opening hole 101 is filled with a curable material such as mortar, and the mortar of the opening hole 101 is refilled. Curing forms the base.

このように本実施例では、上記参考例及び実施例と同様な作用・効果を奏し、また、この例では、開削孔101を形成することにより、中径管82が挿入可能な掘削孔65を形成すれば済み、掘削孔65の施工を簡略化することができる。   As described above, in this embodiment, the same operation and effect as the above-described reference example and embodiment are achieved. In this example, the excavation hole 65 into which the medium diameter pipe 82 can be inserted is formed by forming the cut hole 101. If it forms, it will be sufficient and construction of excavation hole 65 can be simplified.

また、実施例上の効果として、中径管82の下部に前記ビット106を設けることにより、中径管82を回転しながら押し込んで地中に固定することができる。この場合、ビット106は地中に埋設したままとする。   Further, as an effect of the embodiment, by providing the bit 106 at the lower part of the medium diameter pipe 82, the medium diameter pipe 82 can be pushed in and fixed in the ground while rotating. In this case, the bit 106 is left buried in the ground.

図53〜図55は、本発明の実施例4を上記各参考例及び実施例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。この例では、上記実施例2及び3において、貫通孔101,102,103をそれぞれ設置面1Aより上部の大径管81,中径管82,小径管83の地上部に形成している。尚、この例では、山側及び谷側を前後方向とすると、貫通孔101,102,103は大径管81,中径管82,小径管83の左右方向に形成されている。 53 to 55, the fourth embodiment of the present invention will be described in detail by assigning the same reference numerals to the same portions as those of the reference examples and embodiments described above, and omitting the detailed description thereof. In this example, Example 2 and Oite to 3, the through holes 101, 102, 103 respectively mounting surface than the upper 1A large diameter pipe 81, a medium diameter tube 82, is formed on the ground portion of the small-diameter tube 83 . In this example, the through-holes 101, 102, 103 are formed in the left-right direction of the large-diameter pipe 81, the medium-diameter pipe 82, and the small-diameter pipe 83, assuming that the peak side and the valley side are the front-rear direction.

したがって、地上部において長ボルト87を用いて大径管81,中径管82,小径管83を連結することができ、このように支柱5を分割し軽量化し、人力運搬・施工によりどのような場所でも簡便に杭式防護柵を設置することができる。また、最も応力の必要な地際(設置面1A)の上下部は三重構造となり、最も応力が少ない地中部の下部が一重、その他を二重構造にでき、また、分解することが可能となり、支柱の部材重量を軽量化することができる。   Therefore, it is possible to connect the large diameter pipe 81, the medium diameter pipe 82, and the small diameter pipe 83 by using the long bolt 87 in the ground part. A pile-type protective fence can be easily installed even at a place. In addition, the upper and lower parts of the ground (installation surface 1A) where the most stress is required have a triple structure, the lower part of the underground part where the stress is the least can be single, the other can be a double structure, and can be disassembled. The weight of the column member can be reduced.

このように本実施例では、請求項1に対応して、所定の間隔をおいて設けられた複数の支柱5と、支柱5間に設けた防護面たる網材7とを備えた防護柵において、支柱5は、大径管81と、この大径管81内に挿入される中径管82と、この中径管82内に挿入される小径管83とを備え、設置面1Aに立設され、設置面1Aの上下に大径管81と中径管82と小径管83が位置し、大径管81の下端81K位置から中径管82の下端が下方に延設されているから、上記各実施例と同様な作用・効果を奏する。   As described above, in this embodiment, in accordance with the first aspect of the present invention, in a protective fence provided with a plurality of support columns 5 provided at predetermined intervals and a net member 7 as a protective surface provided between the support columns 5. The support column 5 includes a large-diameter pipe 81, an intermediate-diameter pipe 82 inserted into the large-diameter pipe 81, and a small-diameter pipe 83 inserted into the intermediate-diameter pipe 82, and is erected on the installation surface 1A. Since the large-diameter pipe 81, the medium-diameter pipe 82, and the small-diameter pipe 83 are positioned above and below the installation surface 1A, and the lower end of the medium-diameter pipe 82 extends downward from the lower end 81K position of the large-diameter pipe 81, The same operations and effects as the above-described embodiments are achieved.

また、実施例上の効果として、地上部において長ボルト87を用いて大径管81,中径管82,小径管83を連結することができる。   Further, as an effect of the embodiment, the large diameter pipe 81, the medium diameter pipe 82, and the small diameter pipe 83 can be connected using a long bolt 87 in the ground portion.

なお、本発明は、上記各実施例に限定されるものではなく、本発明の趣旨を逸脱しない範囲で変更可能である。例えば、各支柱は内側管材、中間管材、外側管材からなる三重管に限られるものではない。また、端末支柱と中間支柱の構造は同一構造とすることができる。   The present invention is not limited to the above embodiments, and can be modified without departing from the spirit of the present invention. For example, each strut is not limited to a triple pipe composed of an inner tube material, an intermediate tube material, and an outer tube material. Moreover, the structure of a terminal support | pillar and an intermediate | middle support | pillar can be made into the same structure.

1A 設置面
7 網材(防護面)
8 端末支柱
9 中間支柱
10 充填材
11 外側鋼
81 大径
81K 下端
82 中径管
82F 鍔部
83 小径管
84 管材
84F 鍔部
87 長ボルト(連結手段)
88 ナット(連結手段)
105 ストッパ片
1A Installation surface 7 Net material (protective surface)
8 Terminal support 9 Intermediate support
10 Filler
11 outer steel tube
81 large diameter pipe
81K bottom
82 Medium diameter pipe
82F Isobe
83 Small diameter pipe
84 Pipe material
84F Isobe
87 Long bolt (connecting means)
88 Nut (connection means)
105 Stopper piece

Claims (3)

所定の間隔をおいて設けられ内部に充填材が充填された複数の支柱と、前記支柱間に設けた防護面とを備えた防護柵において、
前記支柱は、大径管と、この大径管内に挿入される中径管と、この中径管内に挿入される小径管とを備え、設置面に立設され、
前記設置面の上下に前記大径管と前記中径管と前記小径管が位置し、
前記中径管には鍔部が設けられ、前記鍔部が前記大径管の下端に当接し、前記大径管の内周面と前記中径管の外周面との間の隙間が前記鍔部により塞がれ、
連結手段により前記大径管と前記中径管と前記小径管とが連結され、
前記小径管の下端は前記大径管の下端より下方に位置し、
前記大径管及び前記小径管の下端位置から前記中径管の下端が下方に延設されていることを特徴とする防護柵。
In a protective fence provided with a plurality of columns provided with a predetermined interval and filled with a filler, and a protective surface provided between the columns,
The support column includes a large-diameter pipe, a medium-diameter pipe inserted into the large-diameter pipe, and a small-diameter pipe inserted into the medium-diameter pipe, and is erected on the installation surface.
Wherein the small diameter tube the large diameter tube and the in diameter tube above and below the mounting surface is positioned,
The intermediate diameter pipe is provided with a flange, the flange contacts the lower end of the large diameter pipe, and the gap between the inner peripheral surface of the large diameter pipe and the outer peripheral surface of the medium diameter pipe is the flange. Blocked by the part,
The large diameter tube, the medium diameter tube and the small diameter tube are connected by a connecting means,
The lower end of the small diameter pipe is located below the lower end of the large diameter pipe,
A protective fence, wherein a lower end of the medium-diameter pipe extends downward from a lower end position of the large-diameter pipe and the small-diameter pipe .
前記小径管の外面に複数のストッパ片を設け、これら複数のストッパ片を前記中径管の上端に当接して前記中径管に対する前記小径管の高さ位置決めされていることを特徴とする請求項1記載の防護柵。 Characterized in that the outer providing a plurality of stopper pieces on the peripheral surface, the height of the small diameter tube with respect to the in-diameter tube of the plurality of stopper piece abuts on the upper end of the in-diameter tube of the small diameter tube is positioned claim 1 Symbol placement of fences and. 所定の間隔をおいて設けられ内部に充填材が充填された複数の支柱と、前記支柱間に設けた防護面とを備えた防護柵において、
前記支柱は、大径管と、この大径管内に挿入される中径管と、この中径管内に挿入される小径管とを備え、設置面に立設され、
前記設置面の上下に前記大径管と前記中径管と前記小径管が位置し、
前記大径管の地中下端に連結され前記中径管と同径の管材と、それら大径管と管材とを連結する連結手段とを備え
前記大径管の下部に前記管材の上部が挿入された状態で、前記連結手段により前記大径管と前記管材とが連結され、
前記管材の外周面の前記大径管に挿入した部分にスペーサが設けられ、前記スペーサにより前記大径管の中心と前記管材の中心が位置決めされ、
前記管材には鍔部が設けられ、前記鍔部が前記大径管の下端に当接し、前記大径管の内周面と前記管材の外周面との間の隙間が前記鍔部により塞がれ、
前記大径管の下端位置から前記管材の下端が下方に延設されていることを特徴とする防護柵。
In a protective fence provided with a plurality of columns provided with a predetermined interval and filled with a filler, and a protective surface provided between the columns,
The support column includes a large-diameter pipe, a medium-diameter pipe inserted into the large-diameter pipe, and a small-diameter pipe inserted into the medium-diameter pipe, and is erected on the installation surface.
The large diameter pipe, the medium diameter pipe and the small diameter pipe are located above and below the installation surface,
Wherein comprises a large-diameter pipe is connected to the ground lower the in-diameter pipe and the diameter of the tube, and a connecting means for connecting the their large diameter pipe and tubing,
With the upper portion of the pipe inserted in the lower part of the large diameter pipe, the large diameter pipe and the pipe are connected by the connecting means,
A spacer is provided in a portion of the outer peripheral surface of the pipe inserted into the large diameter pipe, and the center of the large diameter pipe and the center of the pipe are positioned by the spacer,
The pipe is provided with a flange, the flange contacts the lower end of the large-diameter pipe, and the gap between the inner peripheral surface of the large-diameter pipe and the outer peripheral surface of the pipe is closed by the flange. And
A protective fence, wherein a lower end of the pipe material extends downward from a lower end position of the large-diameter pipe .
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