JP2017203292A

JP2017203292A - Protective body support post, and installation method for the same

Info

Publication number: JP2017203292A
Application number: JP2016095323A
Authority: JP
Inventors: 細川　豊; Yutaka Hosokawa; 細川　　豊
Original assignee: SOGOKAIHATSU CO Ltd; T CREATION CENTER CO Ltd; Raiteku KK; Wakow Bussan Co Ltd
Current assignee: SOGOKAIHATSU CO Ltd; T CREATION CENTER CO Ltd; Raiteku KK; Wakow Bussan Co Ltd
Priority date: 2016-05-11
Filing date: 2016-05-11
Publication date: 2017-11-16
Anticipated expiration: 2036-05-11
Also published as: JP6433459B2

Abstract

PROBLEM TO BE SOLVED: To provide a protective body support post and an installation method for the same, the protective body support post being of a structure that combines a plurality of parts but offers load bearing capacity similar to an integrally configured support post, at the same time facilitating the installation work.SOLUTION: A lower body 18a of a support post lower part 18 has a lower projection 18b formed by a fused and deposited bar steel 24, on an outer peripheral surface at a top edge part. An upper body 20a of a support post upper part 20 has an upper projection 20b formed by the fused and deposited bar steel 24, on an outer peripheral surface at a bottom edge part. A receiving steel pipe 22a of a receiving cylinder part 22 has a receiving projection 22b formed by the fused and deposited bar steel, on an inner peripheral surface. When assembled, the top edge part of the support post lower part 18 is disposed inside the receiving cylinder part 22, and the lower projection 18b is engaged with the receiving projection 22b. A bottom edge part of the receiving cylinder part 22 is fused and deposited on the outer peripheral surface of the support post lower part 18. The bottom edge part of the support post upper part 20 is disposed inside the receiving cylinder part 22, and the upper projection 20b is engaged with the receiving projection 22b. A filler material 30 is filled in a gap between the support post lower part 18/support post upper part 20 and the receiving cylinder part 22, for integral connection.SELECTED DRAWING: Figure 10

Description

本発明は、山間地の道路等の山側斜面に構築され、土砂や落石等を受け止めて道路等への落下、流入を阻止する防護体に使用される支柱及びその施工方法に関する。 The present invention relates to a strut that is constructed on a mountain-side slope such as a road in a mountainous area, and that is used for a protective body that receives earth and sand, falling rocks, and the like to prevent falling and inflowing on a road and the like, and a construction method thereof.

従来、この種の防護体用の支柱として、例えば特許文献１に開示されているように、基礎に固定する支柱下部と、この支柱下部の上部に設ける支柱上部とを連結した支柱であって、支柱下部の上側に、支柱上部の下端を挿入固定する受筒部を設けた支柱があった。 Conventionally, as a support for this type of protective body, as disclosed in, for example, Patent Document 1, a support that connects a support lower part fixed to a foundation and a support upper part provided on the upper part of the support lower part, There was a support column provided with a receiving tube part for inserting and fixing the lower end of the support column on the upper side of the support column.

支柱下部、支柱上部及び受筒部はそれぞれ鋼管により形成され、支柱下部及び支柱上部の外径は互いに等しく、受筒部の内径は、支柱下部及び支柱上部の外径よりもゆとりをもって大きく設定されている。受筒部の上端部と支柱上部の外周面には、それぞれフランジ状の鍔継手が延設されている。また、受筒部の軸方向のほぼ中央部の外周面が、肉厚部により補強されている。 The lower part of the column, the upper part of the column and the receiving cylinder part are each formed of a steel pipe, the outer diameters of the lower part of the supporting column and the upper part of the column are equal to each other, and the inner diameter of the receiving cylinder part is set larger than the outer diameter of the lower part of the column and the upper part of the column. ing. Flange-shaped flange joints are extended from the upper end portion of the receiving tube portion and the outer peripheral surface of the upper portion of the support column, respectively. Further, the outer peripheral surface of the substantially central portion in the axial direction of the receiving tube portion is reinforced by the thick portion.

この支柱を施工するときは、支柱下部の上端部を受筒部の下端側に挿入し、受筒部の下端部を支柱下部の上端部の外周面に溶着する。さらに、支柱上部の下端部を、受筒部の上端側に挿入し、受筒部と支柱上部の鍔継手同士をボルトのナットを用いて接合し、受筒部と支柱上部を仮固定する。その後、支柱上部及び支柱下部と受筒部とが対向する隙間にエポキシ系接着剤等の接合剤を充填し、支柱上部、支柱下部及び受筒部を一体に接合する。 When constructing this support column, the upper end portion of the lower portion of the support column is inserted into the lower end side of the receiving tube portion, and the lower end portion of the receiving tube portion is welded to the outer peripheral surface of the upper end portion of the lower portion of the support column. Further, the lower end portion of the upper portion of the support column is inserted into the upper end side of the receiving tube portion, and the joints of the receiving tube portion and the upper portion of the support column are joined together using nuts of bolts to temporarily fix the receiving tube portion and the upper portion of the support column. Thereafter, a bonding agent such as an epoxy-based adhesive is filled in the gap between the upper part of the support and the lower part of the support and the receiving cylinder part, and the upper part of the support, the lower part of the support and the receiving cylinder part are joined together.

複数の支柱を地面に立設した後、例えば、各支柱の先端部と斜面との間を控えロープで接続し、各支柱の間にネット等を張設することによって、防護柵等を形成する。 After standing a plurality of pillars on the ground, for example, connecting the tip of each pillar and the slope with a tie-down rope and stretching a net etc. between each pillar to form a protective fence etc. .

通常の一体物の支柱の場合、外形が大きいので、工場等で防錆用のメッキ処理を行うとき、特別な大きさのメッキ槽が必要になる。また、山間地の施工現場への輸送が大変であり、現場での据え付け作業を行う際にも専用の重機が必要になるケースがある。しかし、この支柱のように小形のパーツを組み合わせて大形の支柱を形成する構造は、小形のパーツの状態でメッキ処理、輸送及び据え付け作業を行うことができるので、各作業を容易に行うことができる。 In the case of a normal monolithic support column, the outer shape is large, so that a specially sized plating tank is required when performing a rust prevention plating process in a factory or the like. In addition, transportation to mountainous construction sites is difficult, and there are cases where dedicated heavy machinery is required for installation work on site. However, the structure that combines small parts such as this strut to form a large strut can be plated, transported, and installed in the state of a small part, so each work must be done easily. Can do.

特開２００８−３１７４２号公報JP 2008-31742 A

特許文献１の支柱は、支柱上部と受筒部の鍔継手をナット等で接合する作業が生じ、非常に面倒である。さらに、落石等の耐衝撃性能について見ると、一体物の支柱よりも劣るという問題がある。 The support of Patent Document 1 is very troublesome because an operation of joining the upper joint of the support and the flange joint of the receiving cylinder portion with a nut or the like occurs. Furthermore, when it sees about impact resistance performance, such as a falling rock, there exists a problem that it is inferior to the support | pillar of an integrated object.

図１３のグラフは、支柱の耐荷重性を評価するため、特許文献1に開示された従来の構造の支柱２の中央部両側の２箇所に荷重を加えて支柱の変位を測定し、「荷重−変位」特性を描いたものである。一体物の支柱の場合、塑性変形の後においてもなだらかなカーブになるので、一定の耐荷重性及び衝撃吸収性が得られる。 In order to evaluate the load resistance of the support column, the graph of FIG. 13 measures the displacement of the support column by applying a load to two places on both sides of the central portion of the support column 2 of the conventional structure disclosed in Patent Document 1. -Describes the "displacement" characteristic. In the case of a monolithic support column, a gentle curve is obtained even after plastic deformation, so that a certain load resistance and shock absorption can be obtained.

これに対して、特許文献１の支柱の場合、最大荷重がほぼ同様となるように設計した場合、塑性変形が進行する過程で、鍔継手同士を接合するボルト等が瞬間的に破損し、図１３の従来の支柱の曲線に示すように、耐荷重性がピークPaから急激に低下する。したがって、防護柵は、一定以上の大きさの落石等を受けると、支柱の連結部分が急激に折れ曲がり、衝撃エネルギーの吸収が少なく、落石等を保持しているネット等にも大きな衝撃が加わって破損し、防護柵全体の耐衝撃性が急激に低下する可能性がある。また、この支柱は、連結部分を補強するため受筒部に肉厚部が設けられているが、引用文献１の図１等に記載されているような構造の場合、補強の効果は限定的である。 On the other hand, in the case of the support of Patent Document 1, when the maximum load is designed to be almost the same, in the process of plastic deformation, the bolts etc. joining the joints are momentarily damaged, As shown by the curve of 13 conventional struts, the load bearing capacity decreases rapidly from the peak Pa. Therefore, if the protective fence receives a falling rock of a certain size or more, the connecting part of the column will be bent sharply, the impact energy will not be absorbed, and a large impact will be applied to the net etc. that holds the falling rock. It may be damaged and the impact resistance of the entire protective fence may be drastically reduced. Moreover, although this support | pillar is provided with the thick part in the receiving cylinder part in order to reinforce a connection part, in the case of the structure as described in FIG. 1 etc. of the cited reference 1, the effect of reinforcement is limited. It is.

なお、ボルト等による接合は仮固定用なので、支柱を施工した後で接合を解除することによって、ボルト等の破損による急激な変化は発生しなくなる。しかし、ボルト等による接合を解除する作業が追加になるので、作業者の負担がさらに大きくなる上、受筒部に対して支柱下部及び支柱上部が僅かの隙間を有して嵌合し接合剤で接着されているだけであるので、この鍔部の接合を解除すると、耐荷重性のピークが上記のPaよりも大きく低下し、全体として、一体物の支柱に近い耐荷重性を得ることは難しい。 In addition, since joining with a bolt etc. is for temporary fixation, the rapid change by breakage | damage of a bolt etc. will not generate | occur | produce by canceling joining after constructing a support | pillar. However, since the work of releasing the joining with bolts or the like is added, the burden on the operator is further increased, and the lower part of the support and the upper part of the support are fitted with a slight gap with respect to the receiving tube part. Therefore, when the joint of this buttock is released, the peak of load resistance is greatly reduced from the above Pa, and as a whole, it is possible to obtain load resistance close to that of a single column. difficult.

本発明は、上記背景技術に鑑みて成されたものであり、複数のパーツを組み合わせた構造でありながら、一体物の支柱に近い耐荷重性を得ることができ、施工作業も容易な防護体用の支柱及びその施工方法を提供することを目的とする。 The present invention has been made in view of the above-mentioned background art, and is a structure in which a plurality of parts are combined. It aims at providing the support | pillar for construction and its construction method.

本発明は、下側部分が地中に埋設される支柱下部と、前記支柱下部の上側に前記支柱下部と同軸に配置された支柱上部と、前記支柱下部と前記支柱上部とを連結する受筒部とを備え、傾斜地の山側斜面に設置される防護体用の支柱であって、
前記支柱下部は、円柱状外形の本体である下部本体を有し、前記下部本体の上端部の外周面に、前記下部本体の軸方向に設けられた複数の突条あって、複数の棒鋼が前記下部本体に溶着して成る下部突条が設けられ、前記支柱上部は、円柱状外形の本体である上部本体を有し、前記上部本体の下端部の外周面に、前記上部本体の軸方向に設けられた複数の突条あって、複数の棒鋼が前記上部本体に溶着して成る上部突条が設けられ、前記受筒部は、本体である受鋼管を有し、前記受鋼管の内周面に、前記受鋼管の軸方向に設けられた複数の突条あって、複数の棒鋼が前記受鋼管に溶着して成る受突条が設けられ、
組み立てた状態で、前記支柱下部の上端部は、前記受筒部の下端側の内側に配置され、前記下部突条が前記受突条に係合し、前記受筒部の下端部は、前記支柱下部の上端部の外周面に溶着され、前記支柱上部の下端部は、前記受筒部の上端側の内側に配置され、前記上部突条が前記受突条に係合し、前記支柱下部、支柱上部及び前記受筒部は、前記支柱下部及び支柱上部と前記受筒部との隙間に充填された充填材により一体に接合している防護体用の支柱である。 The present invention provides a lower part of a support whose lower part is buried in the ground, an upper part of a support disposed coaxially with the lower part of the support above the lower part of the support, and a cylinder that connects the lower part of the support and the upper part of the support And a support column for a protective body installed on a mountain slope of an inclined land,
The lower portion of the column has a lower body that is a cylindrical outer body, and there are a plurality of protrusions provided in an axial direction of the lower body on the outer peripheral surface of the upper end of the lower body, and a plurality of steel bars are provided. A lower protrusion formed by welding to the lower body is provided, and the upper portion of the support column has an upper body that is a cylindrical outer body, and an axial direction of the upper body is provided on an outer peripheral surface of a lower end portion of the upper body. A plurality of protrusions provided on the upper main body, the upper protrusion being formed by welding a plurality of steel bars to the upper body, and the receiving tube portion having a steel receiving pipe as a main body, On the peripheral surface, there are a plurality of protrusions provided in the axial direction of the steel receiving pipe, and a receiving protrusion formed by welding a plurality of steel bars to the steel receiving pipe is provided,
In the assembled state, the upper end portion of the lower portion of the support column is disposed inside the lower end side of the receiving tube portion, the lower protrusion is engaged with the receiving protrusion, and the lower end portion of the receiving tube portion is Welded to the outer peripheral surface of the upper end portion of the lower portion of the support column, the lower end portion of the upper portion of the support column is disposed inside the upper end side of the receiving tube portion, the upper protrusion engages with the receiving protrusion, The upper portion of the support column and the receiving tube portion are protective body support members that are integrally joined by a filler filled in a gap between the lower portion of the support column and the upper portion of the support column and the receiving tube portion.

前記支柱上部の上部本体及び前記支柱下部の下部本体は鋼管で成り、前記各鋼管の内側に補強用鋼材が配置され充填材で埋められていることが好ましい。また、前記支柱上部は、表面全体が耐候性メッキにより覆われ、前記支柱下部及び前記受筒部も、表面全体が耐候性メッキによりに覆われていることが好ましい。 It is preferable that the upper main body at the upper portion of the support column and the lower main body at the lower portion of the support column are made of steel pipes, and a reinforcing steel material is disposed inside each of the steel pipes and is filled with a filler. Further, it is preferable that the entire upper surface of the support column is covered with weathering plating, and the lower surface of the support column and the receiving tube part are also covered with weathering plating.

また本発明は、下側部分が地中に埋設される支柱下部と、前記支柱下部の上側に前記支柱下部と同軸に配置された支柱上部と、前記支柱下部と前記支柱上部とを連結する受筒部とを備え、傾斜地の山側斜面に設置される防護体用の支柱の施工方法であって、
前記支柱下部は、円柱状外形の本体である下部本体を有し、前記下部本体の上端部の外周面に、前記下部本体の軸方向に設けられた複数の突条あって、複数の棒鋼が前記下部本体に溶着して成る下部突条が設けられ、前記支柱上部は、円柱状外形の本体である上部本体を有し、前記上部本体の下端部の外周面に、前記上部本体の軸方向に設けられた複数の突条あって、複数の棒鋼が前記上部本体に溶着して成る上部突条が設けられ、前記受筒部は、本体である受鋼管を有し、前記受鋼管の内周面に、前記受鋼管の軸方向に設けられた複数の突条あって、複数の棒鋼が前記受鋼管に溶着して成る受突条が設けられ、
前記支柱下部の上端部を前記受筒部の下端側に挿入し、前記下部突条を前記受突条に係合させ、この状態で、前記受筒部の下端部を前記支柱下部の上端部の外周面に溶着させる第一の工程と、前記第一の工程の後、前記支柱上部の下端部を前記受筒部の上端側に挿入し、前記上部突条を前記受突条に係合させることによって仮固定する第二の工程と、前記第二の工程の後、前記支柱下部及び支柱上部と前記受筒部との隙間に充填材を充填し、前記支柱下部、支柱上部及び前記受筒部を一体に接合する第三の工程とを行う防護体用の支柱の施工方法である。 The present invention also provides a lower part of the support whose lower part is buried in the ground, an upper part of the support that is arranged coaxially with the lower part of the support above the lower part of the support, and a receiver that connects the lower part of the support and the upper part of the support. A method of constructing a support column for a protective body that is provided on a mountain slope of an inclined land,
The lower portion of the column has a lower body that is a cylindrical outer body, and there are a plurality of protrusions provided in an axial direction of the lower body on the outer peripheral surface of the upper end of the lower body, and a plurality of steel bars are provided. A lower protrusion formed by welding to the lower body is provided, and the upper portion of the support column has an upper body that is a cylindrical outer body, and an axial direction of the upper body is provided on an outer peripheral surface of a lower end portion of the upper body. A plurality of protrusions provided on the upper main body, the upper protrusion being formed by welding a plurality of steel bars to the upper body, and the receiving tube portion having a steel receiving pipe as a main body, On the peripheral surface, there are a plurality of protrusions provided in the axial direction of the steel receiving pipe, and a receiving protrusion formed by welding a plurality of steel bars to the steel receiving pipe is provided,
The upper end of the lower portion of the support column is inserted into the lower end side of the receiving tube portion, and the lower protrusion is engaged with the receiving protrusion, and in this state, the lower end portion of the receiving tube portion is connected to the upper end portion of the lower support column. After the first step of welding to the outer peripheral surface of the tube and after the first step, the lower end portion of the upper portion of the support column is inserted into the upper end side of the receiving tube portion, and the upper protrusion is engaged with the receiving protrusion. After the second step of temporarily fixing by the step, and after the second step, the gap between the lower portion of the support column and the upper portion of the support column and the receiving tube portion is filled with a filler, and the lower portion of the support column, the upper portion of the support column, and the receiving portion. It is the construction method of the support | pillar for protection bodies which performs the 3rd process of joining a cylinder part integrally.

前記支柱上部の上部本体及び前記支柱下部の下部本体は鋼管で成り、前記上部本体は、前記鋼管の内側に補強用鋼材が挿通されて充填材で埋められており、前記下部本体は、前記鋼管の内側に補強用鋼材が挿通されて充填材で埋められているものを用いて施工すると良い。 The upper body of the upper part of the column and the lower body of the lower part of the column are made of a steel pipe, the upper body is filled with a filler by inserting a reinforcing steel material inside the steel pipe, and the lower body is made of the steel pipe It is good to construct using the steel material for reinforcement inserted in the inside and filled with the filler.

前記支柱上部と前記支柱下部及び前記受筒部は、前記下部突条と前記上部突条及び前記受突条とにより形成される隙間に、前記充填剤であるモルタルを充填し硬化させることにより、これらの接合が完了するものである。 The upper portion of the support column, the lower portion of the support column, and the receiving tube portion are filled with a mortar that is the filler in a gap formed by the lower protrusion, the upper protrusion, and the receiving protrusion, and cured. These joinings are completed.

さらに、前記第二及び第三の工程は、前記支柱下部、前記支柱上部及び前記受筒部を施工現場に輸送し、前記支柱下部の下側部分を地中に埋設した後に行うことが好ましい。 Further, it is preferable that the second and third steps are performed after the lower part of the support column, the upper part of the support column and the receiving tube part are transported to a construction site and the lower part of the lower part of the support column is buried in the ground.

本発明の防護体用の支柱及びその施工方法によれれば、小形のパーツを組み合わせて大形の支柱を形成する構造なので、施工現場への輸送、現場での据え付け作業等を容易に行うことができる。さらに、支柱を施工するとき、鍔継手をナット等で接合したり解除したりする面倒な作業が不要であり、作業者の負担を軽減することができる。 According to the support column and its construction method of the present invention, since it is a structure in which small columns are combined to form a large column, transportation to the construction site, installation work on the site, etc. are easily performed. Can do. Furthermore, when constructing the support column, the troublesome work of joining or releasing the flange joint with a nut or the like is unnecessary, and the burden on the operator can be reduced.

また、本発明の支柱の「荷重−変位」特性は、塑性変形の後においても、なだらかに変化する耐荷重性が得られ、しかも、支柱上部、支柱下部及び受筒部に溶着された棒鋼等の突条により、連結部分が効果的に補強されているので、一体物の支柱に近い耐荷重性及び衝撃吸収性を得ることができる。さらに、支柱上部と支柱下部の内側に補強用鋼材を配置し充填材で埋めることによって、支柱の耐荷重性をさらに向上させることができる。 In addition, the “load-displacement” characteristic of the support column of the present invention provides a load resistance that changes gradually even after plastic deformation, and is a bar steel welded to the support column upper part, the support column lower part, and the receiving tube part, etc. Since the connecting portion is effectively reinforced by the protrusions, it is possible to obtain load resistance and shock absorption properties close to those of a single column. Furthermore, the load resistance of the support can be further improved by arranging a reinforcing steel material inside the support upper part and the support lower part and filling it with a filler.

本発明の防護体用の支柱の一実施形態を用いて施工された防護柵を示す図である。It is a figure which shows the protection fence constructed | assembled using one Embodiment of the support | pillar for protection bodies of this invention. この実施形態の支柱の支柱下部及び支柱上部を示す正面図（ａ）、平面図（ｂ）である。It is the front view (a) and top view (b) which show the support | pillar lower part and support | pillar upper part of the support | pillar of this embodiment. この実施形態の支柱の支柱下部及び支柱上部の内側に配置される補強用鋼材を示す正面図（１）、側面図（ｂ）、平面図（ｃ）である。It is the front view (1), side view (b), and top view (c) which show the steel material for reinforcement arrange | positioned inside the support | pillar lower part and support | pillar upper part of the support | pillar of this embodiment. この実施形態の支柱の受筒部を示す正面図（ａ）、平面図（ｂ）である。It is the front view (a) and top view (b) which show the cylinder receiving part of the support | pillar of this embodiment. 支柱下部及び受筒部の製作手順を示すフローチャートである。It is a flowchart which shows the manufacture procedure of a support | pillar lower part and a receiving cylinder part. 図５に示す第五の工程を行った後の支柱下部及び受筒部の状態を示す側面図（ａ）、Ａ−Ａ断面図（ｂ）である。It is the side view (a) which shows the state of a support | pillar lower part and a receiving cylinder part after performing the 5th process shown in FIG. 5, and AA sectional drawing (b). 支柱上部の製作手順を示すフローチャートである。It is a flowchart which shows the manufacture procedure of a support | pillar upper part. 支柱下部及び受筒部に支柱上部を連結する手順を示すフローチャートである。It is a flowchart which shows the procedure which connects a support | pillar upper part to a support | pillar lower part and a receiving cylinder part. 図８に示す第三の工程を行った後の支柱の受筒部及びその近傍の状態を示す側面図である。FIG. 9 is a side view showing a state of a receiving tube portion of a support post and the vicinity thereof after performing the third step shown in FIG. 8. 図９のＢ−Ｂ断面図である。It is BB sectional drawing of FIG. 図１に示す防護柵の施工手順の一例を示すフローチャート（ａ）、施工手順の他の例を示すフローチャート（ｂ）である。It is the flowchart (a) which shows an example of the construction procedure of the protection fence shown in FIG. 1, and the flowchart (b) which shows the other example of a construction procedure. この実施形態の支柱の「荷重−変位」特性を示すグラフである。It is a graph which shows the "load-displacement" characteristic of the support | pillar of this embodiment. 従来の支柱の「荷重−変位」特性を示すグラフである。It is a graph which shows the "load-displacement" characteristic of the conventional support | pillar.

以下、本発明の防護体用の支柱及びその施工方法の一実施形態について、図面に基づいて説明する。図１に示す防護体は、山間地の道路や線路等の山側の斜面Ｓに設けられた防護柵１０であり、落石や土砂崩れ等が発生しやすい危険箇所に沿って設置されている。防護柵１０は、この実施形態の支柱１２を略均等間隔に立設し、必要に応じて各支柱１２の上端部と斜面Ｓとの間を控えロープ１４で接続し、隣り合う支柱１２同士の間にネット１６を張設することにより形成されている。 DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a support column for a protective body and a construction method thereof according to the present invention will be described with reference to the drawings. A protective body shown in FIG. 1 is a protective fence 10 provided on a slope S on a mountain side such as a road or a railroad in a mountainous area, and is installed along a dangerous place where a falling rock or a landslide is likely to occur. The protective fence 10 is configured such that the columns 12 of this embodiment are erected at substantially equal intervals, and if necessary, the upper ends of the columns 12 and the slopes S are connected to each other with a tie-down rope 14 so that adjacent columns 12 can be connected to each other. It is formed by stretching a net 16 therebetween.

支柱１２は、下側部分が地中に埋設された支柱下部１８と、支柱下部１８の上側に支柱下部１８と同軸に配置された支柱上部２０と、支柱下部１８と支柱上部２０とを連結する受筒部２２とを備えている。 The column 12 connects the column lower part 18 whose lower part is buried in the ground, the column upper part 20 disposed coaxially with the column lower part 18 above the column lower part 18, and the column lower part 18 and the column upper part 20. And a receiving tube portion 22.

支柱下部１８は、図２に示すように、円筒形の鋼管で成る下部本体１８ａを有し、下部本体１８ａの上端部の外周面に、下部本体１８ａの軸方向に配置された複数の下部突条１８ｂが設けられている。下部突条１８ｂは、複数の棒鋼２４が下部本体１８ａの外周面に溶着したものである。下部突条１８ｂは、外周面の山側に２つ、谷側に２つ、それぞれ所定の間隔を空けて設けられている。 As shown in FIG. 2, the column lower portion 18 has a lower main body 18a made of a cylindrical steel pipe, and a plurality of lower protrusions arranged in the axial direction of the lower main body 18a on the outer peripheral surface of the upper end portion of the lower main body 18a. Article 18b is provided. The lower protrusion 18b is obtained by welding a plurality of steel bars 24 to the outer peripheral surface of the lower main body 18a. Two lower protrusions 18b are provided on the mountain side of the outer peripheral surface and two on the valley side, respectively, with a predetermined interval.

また、図６に示すように、支柱下部１８の内側には補強用鋼材２６が配置され充填材２８で埋められている。補強用鋼材２６は、図３に示すように、支柱下部１８とほぼ同じ長さの型鋼２６ａを有している。型鋼２６ａの断面形状は略Ｈ形で、２つのフランジが外向きの円弧状に湾曲し、その外側面に補強用の棒鋼２６ｂが溶着して一体になっている。２つのフランジは、それぞれ山側と谷側に配置される。充填材２８については後で説明する。 Further, as shown in FIG. 6, a reinforcing steel material 26 is disposed inside the column lower portion 18 and is filled with a filler 28. As shown in FIG. 3, the reinforcing steel material 26 includes a steel plate 26 a having substantially the same length as that of the lower column 18. The cross-sectional shape of the steel plate 26a is substantially H-shaped, two flanges are curved in an outward arc shape, and a reinforcing steel bar 26b is welded to and integrated with the outer surface thereof. The two flanges are arranged on the mountain side and the valley side, respectively. The filler 28 will be described later.

支柱上部２０は、ここでは支柱下部１８と同じものが兼用されている。以下、支柱上部２０と支柱下部１８とを区別するため、支柱上部２０の各部分について、下部本体１８ａに対応する部分を上部本体２０ａ、下部突条１８ｂに対応する部分を上部突条２０ｂと称する。なお、支柱上部２０の場合は、上部突条２０ｂが設けられた側が下端側となる。 The upper column 20 is the same as the lower column 18 here. Hereinafter, in order to distinguish between the upper column 20 and the lower column 18, for each part of the upper column 20, a portion corresponding to the lower main body 18 a is referred to as an upper main body 20 a, and a portion corresponding to the lower protrusion 18 b is referred to as an upper protrusion 20 b. . In the case of the upper column 20, the side on which the upper protrusion 20 b is provided is the lower end side.

受筒部２２は、図４に示すように、本体である受鋼管２２ａを有し、受鋼管２２ａの内周面に、受鋼管２２ａの軸方向に配置された複数の受突条２２ｂが設けられている。受突条２２ｂは、複数の棒鋼２４が下部本体１８ａの外周面に溶着したものである。受突条２２ｂは、内周面の山側に３つ、谷側に３つ、それぞれ所定の間隔を空けて設けられている。 As shown in FIG. 4, the receiving tube portion 22 has a steel receiving tube 22a as a main body, and a plurality of receiving protrusions 22b arranged in the axial direction of the steel receiving tube 22a are provided on the inner peripheral surface of the steel receiving tube 22a. It has been. The receiving protrusion 22b is obtained by welding a plurality of steel bars 24 to the outer peripheral surface of the lower main body 18a. The receiving protrusions 22b are provided at predetermined intervals, three on the mountain side and three on the valley side of the inner peripheral surface.

以下、支柱１２の施工方法の一実施形態を説明しながら、支柱１２の組み立て状態の構造について説明する。 Hereinafter, the structure of the assembly state of the support column 12 will be described while describing an embodiment of the method for constructing the support column 12.

図５は、支柱下部１８及び受筒部２２の製作手順を示しており、この中のＪ１，Ｊ２，Ｊ３は、施工の前準備の工程である。準備工程Ｊ１は、上記の支柱下部１８を製作する工程であり、下部本体１８ａの内周面に異形棒鋼等の棒鋼２４を抵抗溶接等の方法で溶着し、下部突条１８ｂを形成する。準備工程Ｊ２は、上記の補強用鋼材２６を製作する工程であり、型鋼２６ａのフランジの外側面に異形棒鋼等の棒鋼２６を抵抗溶接等の方法で溶着する。準備工程Ｊ３は、上記の受筒部２２を製作する工程であり、受鋼管２２ａの内周面に異形棒鋼等の棒鋼２４を抵抗溶接等の方法で溶着し、受突条２２ｂを形成する。 FIG. 5 shows a manufacturing procedure of the support lower portion 18 and the receiving tube portion 22, and J1, J2, and J3 in this are pre-preparation steps for construction. The preparation step J1 is a step of manufacturing the above-described lower column 18 and welds a steel bar 24 such as a deformed steel bar to the inner peripheral surface of the lower main body 18a by a method such as resistance welding to form the lower protrusion 18b. The preparation step J2 is a step of manufacturing the above-described reinforcing steel material 26, and a steel bar 26 such as a deformed steel bar is welded to the outer surface of the flange of the die steel 26a by a method such as resistance welding. The preparation step J3 is a step of manufacturing the receiving tube portion 22 described above, and a steel bar 24 such as a deformed steel bar is welded to the inner peripheral surface of the steel receiving tube 22a by a method such as resistance welding to form the receiving protrusion 22b.

支柱下部１８及び受筒部２２が用意できると、まず、第一の工程Ｋ１を行う。第一の工程Ｋ１は、支柱下部１８の上端部を受筒部２２の下端側に挿入し、下部突条１８ｂを受突条２２ｂに係合させ、この状態で、受筒部２２の下端部を支柱下部１８の上端部の外周面に溶着させる工程である。 If the support | pillar lower part 18 and the receiving cylinder part 22 are prepared, the 1st process K1 will be performed first. In the first step K1, the upper end portion of the column lower portion 18 is inserted into the lower end side of the receiving tube portion 22, the lower protrusion 18b is engaged with the receiving protrusion 22b, and in this state, the lower end portion of the receiving tube portion 22 is engaged. Is welded to the outer peripheral surface of the upper end portion of the lower column 18.

支柱下部１８を受筒部２２に挿入するときは、各下部突条１８ｂが相手方の受突条２２ｂの間に入り込むように挿入する。したがって、下部突条１８ｂが受突条２２ｂにガイドされる形になり、支柱下部１８を規定の向きに正確に挿入することができる。また、突条１８ｂ，２２ｂは、支柱下部１８と受筒部２２が互いに隙間を空けて同軸に配置されるように位置決めするスペーサの働きをし、下部突条１８ｂと受突条２２ｂが適度に係合することによって、支柱下部１８と受筒部２２が仮固定される。受筒部２２を支柱下部１８に溶着させるときは、例えば抵抗溶接等の方法を用いる（溶着部２２ｃ）。 When inserting the column lower part 18 into the receiving tube part 22, the lower protrusions 18b are inserted so as to enter between the other receiving protrusions 22b. Accordingly, the lower ridge 18b is guided by the receiving ridge 22b, and the column lower portion 18 can be accurately inserted in a prescribed direction. Further, the ridges 18b and 22b serve as spacers for positioning so that the support lower part 18 and the receiving tube part 22 are arranged coaxially with a gap therebetween, and the lower ridge 18b and the receiving protrusion 22b are appropriately By engaging, the support column lower portion 18 and the receiving tube portion 22 are temporarily fixed. When welding the receiving cylinder part 22 to the support | pillar lower part 18, methods, such as resistance welding, are used, for example (welding part 22c).

第一の工程Ｋ１の後、支柱下部１８及び受筒部２２の表面全体を耐候性メッキで覆うメッキ工程（Ｋ１１）に移る。耐候性メッキは、例えば防錆性を向上させるための溶融亜鉛メッキ等が好適で、一体化した支柱下部１８及び受筒部２２をメッキ槽のメッキ液の中に浸漬して行う。完成した支柱１２の状態でメッキ処理を行うと、通常よりも大きいメッキ槽が必要になるが、支柱下部１８及び受筒部２２の状態（パーツの状態）であれば、通常の大きさのメッキ槽でも十分対応できる。 After the first step K1, the process proceeds to a plating step (K11) in which the entire surfaces of the lower column 18 and the receiving tube portion 22 are covered with weatherproof plating. For example, hot dip galvanization for improving rust prevention is suitable for the weathering plating, and the integrated lower column 18 and the receiving tube 22 are immersed in the plating solution of the plating tank. When plating is performed in the state of the completed support column 12, a larger plating tank is required than usual. However, if the support lower portion 18 and the receiving tube portion 22 are in the state (part state), the plating is of a normal size. Even tanks can be used.

そして、メッキ工程Ｋ１１の後、補強工程Ｋ１２を行う。補強工程Ｋ１２は、下部本体１８の内側に補強用鋼材２６を配置して充填材２８で埋めて硬化させる工程である。充填材２８は、セメントや無収縮モルタル等が好適である。 Then, after the plating step K11, the reinforcing step K12 is performed. The reinforcing step K12 is a step in which the reinforcing steel material 26 is disposed inside the lower main body 18 and is filled with the filler 28 and hardened. The filler 28 is preferably cement or non-shrink mortar.

以上の工程Ｊ１，Ｊ２，Ｊ３，Ｋ１，Ｋ１１，Ｋ１２を行うことによって、図６（ａ）、（ｂ）に示す支柱下部１８及び受筒部２２が製作される。 By performing the above steps J1, J2, J3, K1, K11, and K12, the column lower portion 18 and the receiving tube portion 22 shown in FIGS. 6A and 6B are manufactured.

図７は、支柱上部２０の製作手順を示しており、この中のＪ４，Ｊ２は、施工の前準備の工程である。準備工程Ｊ４は支柱上部２０を製作する工程であり、ここでは支柱下部１８が兼用されるので、作業内容は上記の準備工程Ｊ１と同様である。準備工程Ｊ２は、上記のように、補強用鋼材２６を製作する工程である。 FIG. 7 shows a manufacturing procedure of the column upper part 20, and J4 and J2 in this are preparatory steps for construction. The preparation process J4 is a process of manufacturing the support upper part 20, and since the support lower part 18 is also used here, the work content is the same as the preparation process J1. The preparation step J2 is a step of manufacturing the reinforcing steel material 26 as described above.

支柱上部２０が用意できると、まず、メッキ工程Ｋ１３を行う。メッキ工程Ｋ１３は、支柱上部２０の表面全体を耐候性メッキで覆う工程である。耐候性メッキは、上記のように、例えば防錆性を向上させるための溶融亜鉛メッキ等が好適で、支柱上部２０をメッキ槽のメッキ液の中に浸漬して行う。支柱上部２０の状態（パーツの状態）であれば、通常の大きさのメッキ槽でも十分対応できる。 If the support | pillar upper part 20 is prepared, the plating process K13 will be performed first. The plating step K13 is a step of covering the entire surface of the upper column 20 with weathering plating. As described above, the weatherproof plating is preferably performed by hot dip galvanization for improving rust prevention, for example, and is performed by immersing the column upper portion 20 in a plating solution in a plating tank. As long as the upper column 20 is in a state (parts state), a plating tank of a normal size can be used sufficiently.

そして、メッキ工程Ｋ１３の後、補強工程Ｋ１４を行う。補強工程Ｋ１４は、上部本体２０の内側に補強用鋼材２６を配置して充填材２８で埋めて硬化させる工程である。充填材２８は、無収縮モルタル等が好適である。 Then, after the plating step K13, the reinforcing step K14 is performed. The reinforcing step K14 is a step in which the reinforcing steel material 26 is disposed inside the upper body 20 and is filled with the filler 28 and hardened. The filler 28 is preferably a non-shrink mortar or the like.

以上の工程Ｊ４，Ｊ２，Ｋ１３，Ｋ１４を行うことによって、図６（ａ）、（ｂ）と同様の構造であって、受筒部２２を省略した状態の支柱上部２０が製作される。なお、図７では省略しているが、支柱上部２０の場合、メッキ工程Ｋ１４の後、ネット１６を支持するための金具等を取り付ける工程が設けられる。 By performing the above-described steps J4, J2, K13, and K14, the column upper portion 20 having the same structure as that shown in FIGS. 6A and 6B and having the receiving tube portion 22 omitted is manufactured. Although omitted in FIG. 7, in the case of the upper column 20, a step of attaching a metal fitting or the like for supporting the net 16 is provided after the plating step K <b> 14.

図８は、図５に示す手順で製作された支柱下部１８及び受筒部２２に、図７に示す手順で製作された支柱上部２０を連結する手順を示している。 FIG. 8 shows a procedure for connecting the column upper part 20 manufactured by the procedure shown in FIG. 7 to the column lower part 18 and the receiving tube part 22 manufactured by the procedure shown in FIG.

第二の工程Ｋ２は、支柱上部２０の下端部を受筒部２２の上端側に挿入し、上部突条２０ｂを受突条２２ｂに係合させることによって仮固定する工程である。支柱上部２０を受筒部２２に挿入するときは、上述した支柱下部１８の場合と同様に、各上部突条２０ｂが相手方の受突条２２ｂの間に入り込むように挿入する。したがって、上部突条２０ｂが受突条２２ｂにガイドされる形になり、支柱上部２０を規定の向きに正確に挿入することができる。また、突条２０ｂ，２２ｂは、支柱上部２０と受筒部２２が互いに隙間を空けて同軸に配置されるように位置決めするスペーサの働きをし、上部突条２０ｂと受突条２２ｂが適度に係合することによって、支柱上部２０と受筒部２２が仮固定される。 The second step K2 is a step in which the lower end portion of the column upper portion 20 is inserted into the upper end side of the receiving tube portion 22 and temporarily fixed by engaging the upper protrusion 20b with the receiving protrusion 22b. When inserting the column upper part 20 into the receiving tube part 22, as in the case of the column lower part 18 described above, the upper protrusions 20b are inserted so as to enter between the other receiving protrusions 22b. Therefore, the upper ridge 20b is guided by the receiving ridge 22b, and the column upper portion 20 can be accurately inserted in a prescribed direction. Further, the protrusions 20b and 22b serve as spacers for positioning so that the support upper part 20 and the receiving tube part 22 are arranged coaxially with a gap therebetween, and the upper protrusion 20b and the receiving protrusion 22b are appropriately By engaging, the column upper part 20 and the receiving tube part 22 are temporarily fixed.

そして、第二の工程Ｋ２の後、第三の工程Ｋ３を行う。第三の工程Ｋ３は、支柱下部１８及び支柱上部２０と受筒部２２との隙間に充填材３０に充填し硬化させて、支柱下部１８、支柱上部２０及び受筒部２２を一体に接合する工程である。充填材３０は、いわゆる間詰め材であり、例えば、無収縮モルタルが好適であり、セメントやエポキシ系接着剤でも良い。 Then, after the second step K2, the third step K3 is performed. In the third step K3, the filler 30 is filled and cured in the gaps between the support lower part 18 and the support upper part 20 and the receiving cylinder part 22, and the support lower part 18, the support upper part 20 and the receiving cylinder part 22 are joined together. It is a process. The filler 30 is a so-called filling material, and is preferably a non-shrink mortar, and may be cement or an epoxy adhesive.

以上の工程Ｋ２，Ｋ３を行うことによって、支柱下部１８及び受筒部２２に支柱上部２０が連結され、図９、図１０に示す支柱１２の状態になる。 By performing the above steps K2 and K3, the support column upper part 20 is connected to the support column lower part 18 and the receiving tube part 22, and the state of the support column 12 shown in FIGS.

ここまで、支柱１２の施工方法の一例を説明したが、上述した各工程は、防護柵１０を施工する一連の作業の中の一部として行われる。 Up to this point, an example of a method for constructing the support column 12 has been described. However, the above-described steps are performed as part of a series of operations for constructing the protective fence 10.

図１１（ａ）は、防護柵１０の施工手順の好ましい一例を示している。この例では、支柱下部１８及び受筒部２２を製作する工程（Ｊ１，Ｊ２，Ｊ３，Ｋ１，Ｋ１１，Ｋ１２）と、支柱上部２０を製作する工程（Ｊ２，Ｊ４，Ｋ１３，Ｋ１４）を工場等で行い、各部材をパーツの状態で山間地の施工現場に輸送する。そして、施工現場で支柱下部１８を斜面Ｓに埋設した後、支柱下部１８及び受筒部２２と支柱上部２０とを連結する工程（Ｋ２，Ｋ３）を行って支柱１２を完成させ、控えロープ１４及びネット１６等を設営する。 FIG. 11A shows a preferred example of the construction procedure of the protective fence 10. In this example, a process of manufacturing the column lower part 18 and the receiving tube part 22 (J1, J2, J3, K1, K11, K12) and a process of manufacturing the column upper part 20 (J2, J4, K13, K14) are performed in a factory or the like. And transport each member to the mountain construction site in the state of parts. And after embedding the support | pillar lower part 18 in the slope S at the construction site, the process (K2, K3) which connects the support | pillar lower part 18 and the receiving cylinder part 22, and the support | pillar upper part 20 is performed, the support | pillar 12 is completed, And net 16 etc. are set up.

この施工手順によれば、工場等から現場までの支柱１２の輸送を、小形のパーツの状態で行うことができるので、特別な大型トラック等を用意しなくてもよいという利点がある。また、支柱１２を組み立てる作業の一部（Ｋ２，Ｋ３）を現場で行うことになるが、どちらも容易な作業なので、現場作業者の負担の増加は小さい。 According to this construction procedure, since the transportation of the column 12 from the factory or the like to the site can be performed in the state of small parts, there is an advantage that it is not necessary to prepare a special large truck or the like. In addition, part of the work for assembling the support column 12 (K2, K3) is performed on site, but since both are easy work, an increase in the burden on the field worker is small.

また、図１１（ｂ）は、防護柵１０の施工手順の他の例を示している。この例では、支柱下部１８及び受筒部２２を製作する工程（Ｊ１，Ｊ２，Ｊ３，Ｋ１，Ｋ１１，Ｋ１２）と、支柱上部２０を製作する工程（Ｊ２，Ｊ４，Ｋ１３，Ｋ１４）と、支柱下部１８及び受筒部２２と支柱上部２０とを連結する工程（Ｋ２，Ｋ３）をすべて工場等で行い、支柱１２に組み立てられた状態で山間地の施工現場に輸送する。そして、施工現場で支柱下部１８の部分を斜面Ｓに埋設し、ネット１６及び必要に応じて控えロープ１４等を設営する。この施工手順は、輸送用の大型トラックが確保できる場合に有効であり、現場で支柱１２を組み立てる作業が不要になるので、現場作業者の負担を最小限に抑えることができる。 FIG. 11B shows another example of the construction procedure of the protective fence 10. In this example, a step (J1, J2, J3, K1, K11, K12) for manufacturing the column lower portion 18 and the receiving tube portion 22, a step (J2, J4, K13, K14) for manufacturing the column upper portion 20, and the column All the steps (K2, K3) for connecting the lower portion 18 and the receiving tube portion 22 to the support column upper portion 20 are performed at a factory or the like, and transported to a construction site in a mountainous area while being assembled to the support column 12. And the part of the support | pillar lower part 18 is embed | buried in the slope S at a construction site, and the reserve rope 14 grade | etc., Is constructed | installed as needed. This construction procedure is effective when a large truck for transportation can be secured, and the work of assembling the column 12 on the site is not necessary, so that the burden on the site worker can be minimized.

組み立てられた支柱１２の「荷重−変位」特性は、図１２に示すように、塑性変形の後においてもなだらかなカーブになり、一体物の支柱に近い耐荷重性及び衝撃吸収性が得られる。 As shown in FIG. 12, the “load-displacement” characteristics of the assembled support column 12 have a gentle curve even after plastic deformation, and load resistance and shock absorption close to that of the integrated support column can be obtained.

以上説明したように、この実施形態の支柱１２及びその施工方法によれれば、小形のパーツを組み合わせて大形の支柱１２を形成する構造なので、耐候性メッキの処理、施工現場への輸送、現場での据え付け作業を容易に行うことができる。さらに、支柱１２を施工するとき、鍔継手をナット等で接合したり解除したりする面倒な作業が不要であり、作業者の負担を軽減することができる。 As described above, according to the column 12 of this embodiment and its construction method, since it is a structure in which small columns are combined to form a large column 12, processing of weatherproof plating, transportation to a construction site, Easy installation on site. Furthermore, when the support column 12 is constructed, the troublesome work of joining and releasing the flange joint with a nut or the like is unnecessary, and the burden on the operator can be reduced.

また、支柱１２の「荷重−変位」特性は、塑性変形の後においても、なだらかな耐荷重性が得られ、しかも、支柱上部２０、支柱下部１８及び受筒部２２に溶着された棒鋼２４により、連結部分が効果的に補強されているので、一体物の支柱に近い耐荷重性及び衝撃吸収性を得ることができる。特に、連結部分の隙間に無収縮モルタルの充填材３０を充填して硬化させた場合、連結部分に荷重が作用して圧力がかかっても、モルタルが破壊しにくく、破壊した後も圧縮荷重に対して高い強度を有し、且つ支柱上部２０、支柱下部１８及び受筒部２２との間で大きな間摩擦力を有するので、大きな耐荷重性及び衝撃吸収性を得ることができる。さらに、支柱上部２０と支柱下部１８の内側に補強用鋼材２６を配置し充填材２８で埋めてあるので、支柱１２の耐荷重性がさらに向上している。 Further, the “load-displacement” characteristic of the support column 12 is obtained by the steel bar 24 welded to the support column upper portion 20, the support column lower portion 18, and the receiving tube portion 22 even after the plastic deformation. Since the connecting portion is effectively reinforced, it is possible to obtain load resistance and shock absorption close to those of a single column. In particular, when the gap between the connecting portions is filled with a non-shrink mortar filler 30 and cured, even if a load is applied to the connecting portion and pressure is applied, the mortar is difficult to break, and the compression load is applied even after the breaking. On the other hand, since it has high strength and has a large frictional force between the column upper part 20, the column lower part 18 and the receiving tube part 22, it is possible to obtain a large load resistance and shock absorption. Further, since the reinforcing steel material 26 is disposed inside the support upper part 20 and the support lower part 18 and filled with the filler 28, the load resistance of the support 12 is further improved.

なお、本発明の防護体用の支柱及びその施工方法は、上記実施形態に限定されるものではない。支柱１０の場合、支柱上部２０として、支柱下部１８と同じものが使用されているが、支柱上部は、受筒部を介して支柱下部と連結可能なものであればよく、外形（長さ等）が異なるものを使用してもよい。なお、外形が異なる場合は、その外形に合わせて適切な外形の補強用鋼材を新規に設けるとよい。また、支柱下部１８、支柱上部２０及び受筒部２２に形成された突条１８ｂ，２０ｂ，２２ｂは、連結部分を補強するための棒鋼２４により形成されたものであればよく、各突条１８ｂ，２０ｂ，２２ｂの数や幅や高さは、上記の各工程を実施する際の作業性を考慮して、適宜変更することができる。 In addition, the support | pillar for protection bodies of this invention and its construction method are not limited to the said embodiment. In the case of the support column 10, the same structure as the support column lower part 18 is used as the support column upper part 20. However, the support column upper part only needs to be connectable to the support column lower part via the receiving tube part. ) May be different. If the outer shape is different, a reinforcing steel material having an appropriate outer shape may be newly provided in accordance with the outer shape. Further, the protrusions 18b, 20b, 22b formed on the support lower part 18, the support upper part 20, and the receiving tube part 22 only need to be formed of a steel bar 24 for reinforcing the connecting portion, and each protrusion 18b. , 20b, and 22b can be appropriately changed in consideration of workability when each of the above steps is performed.

さらに、補強用鋼材２６は、支柱上部２０と支柱下部１８を貫通していても良く、少なくとも支柱下部１８から受筒部２２を経て支柱上部２０に入るような長さに形成されていると良い。また、補強用鋼材２６を設ける補強工程Ｋ１２，Ｋ１４は、支柱１２の施工現場で行っても良い。 Further, the reinforcing steel material 26 may penetrate the support column upper part 20 and the support column lower part 18, and may be formed to have a length that enters at least the support column part 20 from the support column lower part 18 through the receiving tube part 22. . Further, the reinforcing steps K12 and K14 for providing the reinforcing steel material 26 may be performed at the construction site of the support column 12.

この他、施工現場の環境条件が合えば、耐候性メッキの処理は省略することができる。また、上記の支柱上部１８及び支柱下部２０は、内側に補強用鋼材２６が埋め込まれて補強されているが、補強用鋼材２６以外の形状の補強用鋼材を使用してもよい。また、補強用鋼材２６は耐候性メッキ処理を行わなくてもよく、メッキ槽内に収まるように短くする必要がない。したがって、補強用鋼材２６以外の各部材を支柱１２の状態に組み立てた後、上部本体２０及び下部本体１８内を通貫する長尺の補強用鋼材２６を埋め込むようにしてもよい。また、上部本体及び下部本体の強度が十分であれば、補強用鋼材及び充填材を省略してもよく、上部本体及び下部本体として鋼管以外の部材を使用することも可能である。 In addition, if the environmental conditions at the construction site are met, the weather-resistant plating process can be omitted. Moreover, although the above-mentioned support | pillar upper part 18 and support | pillar lower part 20 are reinforced by embedding the reinforcement steel material 26 inside, you may use the reinforcement steel materials of shapes other than the reinforcement steel material 26. FIG. Further, the reinforcing steel material 26 does not need to be subjected to weathering plating, and does not need to be shortened so as to be accommodated in the plating tank. Therefore, after assembling each member other than the reinforcing steel material 26 into the state of the support column 12, the long reinforcing steel material 26 penetrating through the upper main body 20 and the lower main body 18 may be embedded. Further, if the strength of the upper body and the lower body is sufficient, the reinforcing steel material and the filler may be omitted, and members other than the steel pipe can be used as the upper body and the lower body.

また、この支柱及び施工方法が適用できる防護体は特に限定されず、ネットが張設される防護柵以外の様々な防護体に適用することができる Moreover, the protection body which can apply this support | pillar and construction method is not specifically limited, It can apply to various protection bodies other than the protection fence by which a net is stretched.

１０防護柵（防護体）
１２支柱
１８支柱下部
１８ａ下部本体（鋼管）
１８ｂ下部突条
２０支柱上部
２０ａ上部本体（鋼管）
２０ｂ上部突条
２２受筒部
２２ａ受鋼管
２２ｂ受突条
２２ｃ溶着部
２４棒鋼
２６補強用鋼材
２８，３０充填材
Ｋ１第一の工程
Ｋ２第二の工程
Ｋ３第三の工程 10 Guard fence (protector)
12 Prop 18 Prop lower part 18a Lower body (steel pipe)
18b Lower ridge 20 Upper column 20a Upper body (steel pipe)
20b Upper ridge 22 Receiving tube portion 22a Receiving steel tube 22b Receiving ridge 22c Welding portion 24 Steel bar 26 Reinforcing steel materials 28 and 30 Filler K1 First step K2 Second step K3 Third step

Claims

下側部分が地中に埋設される支柱下部と、前記支柱下部の上側に前記支柱下部と同軸に配置された支柱上部と、前記支柱下部と前記支柱上部とを連結する受筒部とを備え、傾斜地の山側斜面に設置される防護体用の支柱において、
前記支柱下部は、円柱状外形の本体である下部本体を有し、前記下部本体の上端部の外周面に、前記下部本体の軸方向に設けられた複数の突条あって、複数の棒鋼が前記下部本体に溶着して成る下部突条が設けられ、
前記支柱上部は、円柱状外形の本体である上部本体を有し、前記上部本体の下端部の外周面に、前記上部本体の軸方向に設けられた複数の突条あって、複数の棒鋼が前記上部本体に溶着して成る上部突条が設けられ、
前記受筒部は、本体である受鋼管を有し、前記受鋼管の内周面に、前記受鋼管の軸方向に設けられた複数の突条あって、複数の棒鋼が前記受鋼管に溶着して成る受突条が設けられ、
組み立てた状態で、前記支柱下部の上端部は、前記受筒部の下端側の内側に配置され、前記下部突条が前記受突条に係合し、前記受筒部の下端部は、前記支柱下部の上端部の外周面に溶着され、前記支柱上部の下端部は、前記受筒部の上端側の内側に配置され、前記上部突条が前記受突条に係合し、前記支柱下部、支柱上部及び前記受筒部は、前記支柱下部及び支柱上部と前記受筒部との隙間に充填された充填材により一体に接合していることを特徴とする防護体用の支柱。 A lower part of the support whose lower part is buried in the ground, an upper part of the support arranged coaxially with the lower part of the support above the lower part of the support, and a receiving tube part that connects the lower part of the support and the upper part of the support In the pillar for the protective body installed on the mountain slope of the slope,
The lower portion of the column has a lower body that is a cylindrical outer body, and there are a plurality of protrusions provided in an axial direction of the lower body on the outer peripheral surface of the upper end of the lower body, and a plurality of steel bars are provided. A lower protrusion formed by welding to the lower body is provided,
The upper portion of the support has an upper body that is a cylindrical outer body, and there are a plurality of protrusions provided in the axial direction of the upper body on the outer peripheral surface of the lower end of the upper body, and a plurality of steel bars are provided. An upper protrusion formed by welding to the upper body is provided,
The receiving tube portion has a receiving steel pipe as a main body, and there are a plurality of protrusions provided in an axial direction of the receiving steel pipe on an inner peripheral surface of the receiving steel pipe, and a plurality of steel bars are welded to the receiving steel pipe. A receiving ridge is formed,
In the assembled state, the upper end portion of the lower portion of the support column is disposed inside the lower end side of the receiving tube portion, the lower protrusion is engaged with the receiving protrusion, and the lower end portion of the receiving tube portion is Welded to the outer peripheral surface of the upper end portion of the lower portion of the support column, the lower end portion of the upper portion of the support column is disposed inside the upper end side of the receiving tube portion, the upper protrusion engages with the receiving protrusion, The supporting column support and the receiving tube part are integrally joined to each other by a filler filled in a gap between the supporting column lower part and the supporting column upper part and the receiving tube part.

前記支柱上部の上部本体及び前記支柱下部の下部本体は鋼管で成り、前記各鋼管の内側に補強用鋼材が配置され充填材で埋められている請求項１記載の防護体用の支柱。 2. The support column according to claim 1, wherein the upper main body of the upper column and the lower main body of the lower column are made of steel pipes, and a reinforcing steel material is disposed inside each of the steel tubes and filled with a filler.

前記支柱上部は、表面全体が耐候性メッキにより覆われ、前記支柱下部及び前記受筒部は、耐候性メッキによりに覆われている請求項１又は２記載の防護体用の支柱。 3. The support column according to claim 1, wherein the upper surface of the support column is entirely covered with weatherproof plating, and the lower support portion and the receiving tube portion are covered with weatherproof plating.

下側部分が地中に埋設される支柱下部と、前記支柱下部の上側に前記支柱下部と同軸に配置された支柱上部と、前記支柱下部と前記支柱上部とを連結する受筒部とを備え、傾斜地の山側斜面に設置される防護体用の支柱の施工方法において、
前記支柱下部は、円柱状外形の本体である下部本体を有し、前記下部本体の上端部の外周面に、前記下部本体の軸方向に設けられた複数の突条あって、複数の棒鋼が前記下部本体に溶着して成る下部突条が設けられ、
前記支柱上部は、円柱状外形の本体である上部本体を有し、前記上部本体の下端部の外周面に、前記上部本体の軸方向に設けられた複数の突条あって、複数の棒鋼が前記上部本体に溶着して成る上部突条が設けられ、
前記受筒部は、本体である受鋼管を有し、前記受鋼管の内周面に、前記受鋼管の軸方向に設けられた複数の突条あって、複数の棒鋼が前記受鋼管に溶着して成る受突条が設けられ、
前記支柱下部の上端部を前記受筒部の下端側に挿入し、前記下部突条を前記受突条に係合させ、この状態で、前記受筒部の下端部を前記支柱下部の上端部の外周面に溶着させる第一の工程と、前記第一の工程の後、前記支柱上部の下端部を前記受筒部の上端側に挿入し、前記上部突条を前記受突条に係合させることによって仮固定する第二の工程と、前記第二の工程の後、前記支柱下部及び支柱上部と前記受筒部との隙間に充填材を充填し、前記支柱下部、支柱上部及び前記受筒部を一体に接合する第三の工程とを行うことを特徴とする防護体用の支柱の施工方法。 A lower part of the support whose lower part is buried in the ground, an upper part of the support arranged coaxially with the lower part of the support above the lower part of the support, and a receiving tube part that connects the lower part of the support and the upper part of the support In the construction method of the support column for the protective body installed on the mountain side slope of the slope,
The lower portion of the column has a lower body that is a cylindrical outer body, and there are a plurality of protrusions provided in an axial direction of the lower body on the outer peripheral surface of the upper end of the lower body, and a plurality of steel bars are provided. A lower protrusion formed by welding to the lower body is provided,
The upper portion of the support has an upper body that is a cylindrical outer body, and there are a plurality of protrusions provided in the axial direction of the upper body on the outer peripheral surface of the lower end of the upper body, and a plurality of steel bars are provided. An upper protrusion formed by welding to the upper body is provided,
The receiving tube portion has a receiving steel pipe as a main body, and there are a plurality of protrusions provided in an axial direction of the receiving steel pipe on an inner peripheral surface of the receiving steel pipe, and a plurality of steel bars are welded to the receiving steel pipe. A receiving ridge is formed,
The upper end of the lower portion of the support column is inserted into the lower end side of the receiving tube portion, and the lower protrusion is engaged with the receiving protrusion, and in this state, the lower end portion of the receiving tube portion is connected to the upper end portion of the lower support column. After the first step of welding to the outer peripheral surface of the tube and after the first step, the lower end portion of the upper portion of the support column is inserted into the upper end side of the receiving tube portion, and the upper protrusion is engaged with the receiving protrusion. After the second step of temporarily fixing by the step, and after the second step, the gap between the lower portion of the support column and the upper portion of the support column and the receiving tube portion is filled with a filler, and the lower portion of the support column, the upper portion of the support column, and the receiving portion. A method for constructing a support column for a protective body, comprising performing a third step of integrally joining the cylindrical portions.

前記支柱上部の上部本体及び前記支柱下部の下部本体は鋼管で成り、
前記上部本体は、前記鋼管の内側に補強用鋼材が挿通されて充填材で埋められており、前記下部本体は、前記鋼管の内側に補強用鋼材が挿通されて充填材で埋められているものを用いる請求項４記載の防護体用の支柱の施工方法。 The upper main body of the upper column and the lower main body of the lower column are made of steel pipes,
The upper main body has a reinforcing steel material inserted inside the steel pipe and filled with a filler, and the lower main body has a reinforcing steel material inserted inside the steel pipe and filled with a filler. The construction method of the support | pillar for protective bodies of Claim 4 using this.

前記支柱上部と前記支柱下部及び前記受筒部は、前記下部突条と前記上部突条及び前記受突条とにより形成される隙間に、前記充填剤であるモルタルを充填し硬化させることにより、これらの接合が完了する請求項４記載の防護体用の支柱の施工方法。 The upper portion of the support column, the lower portion of the support column, and the receiving tube portion are filled with a mortar that is the filler in a gap formed by the lower protrusion, the upper protrusion, and the receiving protrusion, and cured. The construction method of the support | pillar for protection bodies of Claim 4 which these joining completes.

前記第二及び第三の工程は、前記支柱下部、前記支柱上部及び前記受筒部を施工現場に輸送し、前記支柱下部の下側部分を地中に埋設した後に行う請求項４乃至６のいずれか記載の防護体用の支柱の施工方法。 The second and third steps are performed after the lower part of the support column, the upper part of the support column and the receiving tube part are transported to a construction site and the lower part of the lower part of the support column is buried in the ground. The construction method of the support | pillar for any protection body as described in any one.