JP2008002125A

JP2008002125A - Snow avalanche prevention fence

Info

Publication number: JP2008002125A
Application number: JP2006171998A
Authority: JP
Inventors: Shoichi Inoue; 昭一井上; Toshihiro Fujii; 智弘藤井; Yoichi Nishida; 陽一西田; Mitsuaki Yamamoto; 満明山本; Isao Ueishi; 勲上石
Original assignee: ARUGOSU KK; Protec Engineering Inc
Current assignee: ARUGOSU KK; Protec Engineering Inc
Priority date: 2006-06-21
Filing date: 2006-06-21
Publication date: 2008-01-10

Abstract

PROBLEM TO BE SOLVED: To provide a snow avalanche prevention fence, improving the strength of a column subjected to compressive force due to external force. SOLUTION: The columns 1 are erected at spaces, and a protection surface 26 is provided corresponding to the mountain side Y between the columns 1. The columns 1 are formed of a steel pipe 2 in which tensile force is introduced in the longitudinal direction. The column 1 and the mountain side slope 22 of the column 1 are connected to each other by a stay rope material 31. Since the tensile force is introduced in the longitudinal direction on the mountain side Y of a section of the steel pipe 2, when the snowfall load is applied to the protection surface 26, although the compressive force is applied to the mountain side Y below the connecting position of the column 1 to the stay rope material 31, tensile force resists against this compressive force to obtain the column 1 having strong load. COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、雪崩を予防する雪崩予防柵に関する。 The present invention relates to an avalanche prevention fence for preventing an avalanche.

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

上記のような防護柵には、鋼管が用いられており、さらに、その鋼管の強度を増すため、内部にＰＣ鋼材を配置し、コンクリートを充填した充填鋼管（例えば特許文献４）が用いられている。
特開平６−１７３２２１号公報特開２０００−２４８５１５号公報（段落００１３段）特開平８−１８４０１４号公報特開２００１−３２３４１６号公報 Steel pipes are used for the above-mentioned protective fences. Further, in order to increase the strength of the steel pipes, filled steel pipes (for example, Patent Document 4) in which PC steel materials are arranged and filled with concrete are used. Yes.
JP-A-6-173221 JP 2000-248515 A (paragraph 0013) JP-A-8-184014 JP 2001-323416 A

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

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

そこで、本発明は、外部からの力により圧縮力や引張力を受ける支柱の強度を向上することができる雪崩予防柵を提供することを目的とする。 Then, an object of this invention is to provide the avalanche prevention fence which can improve the intensity | strength of the support | pillar which receives compression force and tensile force with the force from the outside.

請求項１の発明は、間隔をおいて支柱を立設すると共に、これら支柱間に山側に対応する防護面を設けた雪崩予防柵において、前記支柱は、長さ方向に引張力を導入した鋼管からなるものである。 The invention of claim 1 is an avalanche prevention fence in which struts are erected at intervals and a protective surface corresponding to the mountain side is provided between the struts. The strut is a steel pipe into which a tensile force is introduced in the length direction. It consists of

また、請求項２の発明は、間隔をおいて支柱を立設すると共に、これら支柱間に山側に対応する防護面を設けた雪崩予防柵において、前記支柱は、長さ方向に圧縮力を導入した鋼管からなるものである。 Further, the invention of claim 2 is an avalanche prevention fence in which struts are erected at intervals and a protective surface corresponding to the mountain side is provided between the struts. The struts introduce compressive force in the length direction. Made of steel pipe.

また、請求項３の発明は、前記引張力を前記鋼管断面の一側に導入し、前記鋼管断面の他側に長さ方向の圧縮力を導入したものである。 According to a third aspect of the present invention, the tensile force is introduced into one side of the steel pipe cross section, and a compressive force in the length direction is introduced into the other side of the steel pipe cross section.

また、請求項４の発明は、前記引張力と前記圧縮力を略同一に設定したものである。 According to a fourth aspect of the present invention, the tensile force and the compressive force are set substantially the same.

また、請求項５の発明は、前記支柱と該支柱山側の斜面とを控えロープ材により連結し、前記引張力を前記鋼管断面の山側で長さ方向に導入したものである。 According to a fifth aspect of the present invention, the support column and the slope on the support mountain side are connected by a reed rope material, and the tensile force is introduced in the length direction on the mountain side of the steel pipe cross section.

また、請求項６の発明は、前記支柱と該支柱山側の斜面とを控えロープ材により連結し、前記圧縮力を前記鋼管断面の谷側で長さ方向に導入したものである。 Further, the invention of claim 6 is one in which the support column and the slope on the support mountain side are connected by a constraining rope material, and the compressive force is introduced in the length direction on the valley side of the cross section of the steel pipe.

また、請求項７の発明は、前記鋼管に配置され該鋼管の長さ方向に引張力を加える圧縮部材を備え、長さ方向に間隔を置いて前記鋼管に対をなす支圧部を設け、前記圧縮部材は、それら支圧部の間隔を広げる方向の弾性復元力を有するものである。 The invention of claim 7 is provided with a compression member that is arranged on the steel pipe and applies a tensile force in the length direction of the steel pipe, and is provided with a bearing section that forms a pair with the steel pipe at intervals in the length direction. The compression member has an elastic restoring force in a direction that widens the interval between the bearing portions.

また、請求項８の発明は、隣り合う前記支柱同士を連結部材により連結したものである。 The invention according to claim 8 is such that adjacent struts are connected by a connecting member.

また、請求項９の発明は、前記支柱は、上部支柱と埋設部分の下部支柱とからなり、前記引張力を前記上部支柱の鋼管断面の山側で長さ方向に導入したものである。 According to a ninth aspect of the present invention, the support column includes an upper support column and a lower support column of the embedded portion, and the tensile force is introduced in the length direction on the mountain side of the steel pipe cross section of the upper support column.

また、請求項１０の発明は、前記支柱は、上部支柱と埋設部分の下部支柱とからなり、前記圧縮力を前記上部支柱の鋼管断面の谷側で長さ方向に導入したものである。 According to a tenth aspect of the present invention, the support column is composed of an upper support column and a lower support column, and the compressive force is introduced in the length direction on the trough side of the steel pipe cross section of the upper support column.

請求項１の構成によれば、防護面に積雪荷重が加わった際の支柱の圧縮領域に、予め引張力を導入しておくことにより、荷重に強い支柱が得られる。 According to the configuration of the first aspect, a strut that is strong against the load can be obtained by introducing a tensile force in advance into the compression region of the strut when a snow load is applied to the protective surface.

また、請求項２の構成によれば、防護面に積雪荷重が加わった際の支柱の引張領域に、予め圧縮力を導入しておくことにより、荷重に強い支柱が得られる。 According to the second aspect of the present invention, a load-resistant strut can be obtained by introducing a compressive force in advance into the tension region of the strut when a snow load is applied to the protective surface.

また、請求項３の構成によれば、曲げモーメントにより発生する断面一側の圧縮力と断面他側の引張力とに対して、予め導入した断面一側の引張力と断面他側の圧縮力とが対抗する。 According to the third aspect of the present invention, in contrast to the compressive force on one side of the cross section and the tensile force on the other side of the cross section generated by the bending moment, the tensile force on the one side of the cross section and the compressive force on the other side of the cross section introduced in advance. And counter.

また、請求項４の構成によれば、引張力と圧縮力とを略同一に設定することにより、長さ方向の軸力が釣り合い、鋼管の長さ方向に軸力が発生することがない。 According to the configuration of claim 4, by setting the tensile force and the compressive force substantially the same, the axial force in the length direction is balanced, and no axial force is generated in the length direction of the steel pipe.

また、請求項５の構成によれば、防護面に積雪荷重が加わると、支柱の控えロープ材連結位置より下部の山側に圧縮力が加わるが、この圧縮力に対して引張力が対抗することにより、荷重に強い支柱が得られる。 According to the structure of claim 5, when a snow load is applied to the protective surface, a compressive force is applied to the mountain side below the connecting rope material connecting position of the support column, but the tensile force counters this compressive force. Thus, a strut that is resistant to load can be obtained.

また、請求項６の構成によれば、防護面に積雪荷重が加わると、支柱の控えロープ材連結位置より下部の山側に圧縮力が加わるが、この圧縮力に対して谷側の圧縮力が対抗することにより、荷重に強い支柱が得られる。 According to the configuration of claim 6, when a snow load is applied to the protective surface, a compressive force is applied to the mountain side below the connecting rope material connecting position of the support column. By struggling, a strut that is resistant to loads can be obtained.

また、請求項７の構成によれば、支圧部間を広げる弾性復元力により鋼管の長さ方向に引張力を加えることができる。 Moreover, according to the structure of Claim 7, a tensile force can be added to the length direction of a steel pipe by the elastic restoring force which spreads between the bearing parts.

また、請求項８の構成によれば、連結部材により隣り合う支柱間に間隔が保持され、それら支柱と連結部材とからなる門型構造により強度が向上する。 Moreover, according to the structure of Claim 8, a space | interval is hold | maintained between adjacent support | pillars by a connection member, and intensity | strength improves with the portal type structure which consists of these support | pillars and a connection member.

また、請求項９の構成によれば、防護面に積雪荷重が加わると、上部支柱の控えロープ材連結位置より下側の山側に圧縮力が加わるが、この圧縮力に対して圧縮部材の引張力が対抗することにより、荷重に強い支柱が得られる。 According to the ninth aspect of the present invention, when a snow load is applied to the protective surface, a compressive force is applied to the mountain side below the connecting rope material connecting position of the upper support column. When the force opposes, a strut that is resistant to load is obtained.

また、請求項１０の構成によれば、防護面に積雪荷重が加わると、上部支柱の控えロープ材連結位置より下側の山側に圧縮力が加わるが、この圧縮力に対して谷側の圧縮力が対抗することにより、荷重に強い支柱が得られる。 Further, according to the structure of claim 10, when a snow load is applied to the protective surface, a compressive force is applied to the mountain side below the connecting rope material connecting position of the upper support column. The struts that are strong against the load can be obtained by the opposing compression force.

本発明における好適な実施の形態について、添付図面を参照しながら詳細に説明する。尚、以下に説明する実施の形態は、特許請求の範囲に記載された本発明の内容を限定するものではない。また、以下に説明される構成の全てが、本発明の必須要件であるとは限らない。各実施例では、従来とは異なる新規な雪崩予防柵を採用することにより、従来にない雪崩予防柵が得られ、その雪崩予防柵について記述する。 Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, a new avalanche prevention fence that is different from the conventional avalanche prevention fence is obtained, and the avalanche prevention fence is described.

以下、本発明の実施例１について、図１〜図１１を参照して説明する。まず、図１〜図８に示すように、支柱１は、鋼管２と、この鋼管２の長さ方向に引張力を加える圧縮部材たる鋼棒３とを備える。また、前記鋼管２の両端部に、それぞれ支圧部たる支圧板４，４を設け、これら支圧板４，４は溶接などにより鋼管２の内周面の一側に固着されている。その支圧板４は、鋼管２の内周面に対応する円弧部８を有し、この円弧部８を鋼管の内周面に溶着などにより固着している。そして、前記鋼棒３を長さ方向に圧縮した状態で、該鋼棒３の両端側を前記支圧板４，４に定着し、鋼管１に長さ方向の引張力を導入する。その支圧板４，４には前記鋼棒３を挿通する挿通孔５，５が穿設されている。 Hereinafter, Example 1 of the present invention will be described with reference to FIGS. First, as shown in FIGS. 1-8, the support | pillar 1 is equipped with the steel pipe 2 and the steel rod 3 which is a compression member which applies tensile force to the length direction of this steel pipe 2. As shown in FIG. In addition, bearing plates 4 and 4 serving as bearing portions are provided at both ends of the steel pipe 2, and these bearing plates 4 and 4 are fixed to one side of the inner peripheral surface of the steel pipe 2 by welding or the like. The bearing plate 4 has an arc portion 8 corresponding to the inner peripheral surface of the steel pipe 2, and the arc portion 8 is fixed to the inner peripheral surface of the steel pipe by welding or the like. Then, in a state where the steel bar 3 is compressed in the length direction, both end sides of the steel bar 3 are fixed to the bearing plates 4 and 4, and a tensile force in the length direction is introduced into the steel pipe 1. The bearing plates 4 and 4 are formed with insertion holes 5 and 5 through which the steel rod 3 is inserted.

また、前記鋼棒３の両端側には雌螺子部６が形成され、この雌螺子部６にナット体７が螺合する。 Further, female screw portions 6 are formed on both end sides of the steel rod 3, and a nut body 7 is screwed into the female screw portion 6.

前記鋼棒３は内装体11により前記鋼管２内に配置され、その内装体11は、対をなす鞘管12，12Ａと、長さ方向に間隔をおいて設けた複数のスペーサ13，13…とからなる。前記対をなす鞘管12，12は、鋼管２内の対向する位置で、鋼管２の内面に近い位置にあり、前記スペーサ13は、前記鋼管２に内嵌するリング板状をなし、前記鞘管12を挿通する挿通孔14を備え、この挿通孔14において鞘管12を固定している。 The steel bar 3 is disposed in the steel pipe 2 by an inner body 11, and the inner body 11 includes a pair of sheath pipes 12, 12A and a plurality of spacers 13, 13,. It consists of. The pair of sheath pipes 12 and 12 are opposed to each other in the steel pipe 2 and are close to the inner surface of the steel pipe 2, and the spacer 13 has a ring plate shape that fits inside the steel pipe 2. An insertion hole 14 for inserting the tube 12 is provided, and the sheath tube 12 is fixed in the insertion hole 14.

次に、前記支柱１における引張力の導入方法につき説明すると、まず、鋼管２内に内装体11を挿入した後、鋼管２の両側に支圧板４，４を固定する。この場合、内装体11を鋼管２内面に固定してもよいし、あるいは固定しなくてもよいが、支圧板４の挿通孔５と内装体11の一方の鞘管12との位置を合せておく。 Next, a method for introducing a tensile force in the support column 1 will be described. First, after the inner body 11 is inserted into the steel pipe 2, the bearing plates 4 and 4 are fixed to both sides of the steel pipe 2. In this case, the inner body 11 may be fixed to the inner surface of the steel pipe 2 or may not be fixed, but the positions of the insertion hole 5 of the bearing plate 4 and the one sheath pipe 12 of the inner body 11 are matched. deep.

まず、鋼管２の長さ方向一側の挿通孔５から、鋼棒３を鞘管12内に挿入し、この鞘管12の長さ方向他側から出た鋼棒３の他端に、鞘管12と支圧板４との間で、ナット体７を螺合し、このナット体７を回しながら鋼棒３の他端を長さ方向他側の挿通孔５から外側に所定長さだけ突出させて、鋼棒３の一端３Ｔが挿通孔５を挿通したら、その一端３Ｔに支圧板４と鞘管12との間でナット体７を螺合図６に示すように、一端３Ｔが支圧板４の外側に突出するように配置する。尚、鋼棒３の他端も他側の支圧板４の外側に突出する。 First, the steel rod 3 is inserted into the sheath tube 12 from the insertion hole 5 on the one side in the length direction of the steel tube 2, and the sheath is connected to the other end of the steel rod 3 that has come out from the other length direction of the sheath tube 12. A nut body 7 is screwed between the tube 12 and the bearing plate 4, and the other end of the steel bar 3 protrudes from the insertion hole 5 on the other side in the longitudinal direction by a predetermined length while turning the nut body 7. When one end 3T of the steel rod 3 is inserted through the insertion hole 5, the nut body 7 is screwed between the bearing plate 4 and the sheath tube 12 at the one end 3T, as shown in FIG. It arranges so that it may protrude outside. In addition, the other end of the steel bar 3 protrudes to the outside of the support plate 4 on the other side.

この後、鋼棒３の両端側から長さ方向の圧縮力を加える。そして、図６の白抜き矢印に示す圧縮力により一端３Ｔを寸法Ｋだけ押し込み、これにより支圧板４とナット体７との間に隙間Ｋが発生したら、ナット体７を支圧板４に近づける方向に回し、これを他端側も同様に行い、図７に示すように、鋼棒３を圧縮した状態で、ナット体７，７により両端を支圧板４，４に固定する。 Thereafter, a compressive force in the length direction is applied from both ends of the steel bar 3. Then, when one end 3T is pushed in by a dimension K by the compressive force indicated by the white arrow in FIG. 6 and a gap K is generated between the bearing plate 4 and the nut body 7, the nut body 7 is brought closer to the bearing plate 4. The other end side is also turned in the same manner. As shown in FIG. 7, both ends are fixed to the bearing plates 4, 4 by the nut bodies 7, 7 while the steel bar 3 is compressed.

したがって、長さ方向に圧縮された鋼棒３の弾性復元力により、鋼管２を長さ方向に引き伸ばす引張力を加えることができる。 Therefore, a tensile force for stretching the steel pipe 2 in the length direction can be applied by the elastic restoring force of the steel bar 3 compressed in the length direction.

図９〜図１１は、前記支柱１を用いた雪崩予防柵21を示し、雪圧を受ける雪崩予防柵21は、設置場所である山の斜面22にほぼ垂直に、支柱として前記支柱１，１…を立設し、これら支柱１，１…は所定間隔を置いて斜面２に複数立設され、この場合、前記鋼棒３を山側Ｙにし、支柱１全長の約２分の１を斜面22の下部に埋設固定している。また、それら支柱１の上端間を、鋼材などからなる連結部材23により連結している。尚、図中、Ｔは谷側である。尚、前記支柱１は、基礎を用いることなく、斜面22に穿孔した縦孔に建て込まれる。 FIGS. 9-11 shows the avalanche prevention fence 21 using the said support | pillar 1, and the avalanche prevention fence 21 which receives a snow pressure is the said support | pillar 1,1 as a support | pillar substantially perpendicularly to the slope 22 of the mountain which is an installation place. .. Are erected on the slope 2 at predetermined intervals. In this case, the steel rod 3 is set to the mountain side Y, and about one half of the entire length of the pillar 1 is inclined 22. It is buried and fixed at the bottom. Further, the upper ends of the columns 1 are connected by a connecting member 23 made of steel or the like. In the figure, T is the valley side. In addition, the said support | pillar 1 is built in the vertical hole drilled in the slope 22 without using a foundation.

また、前記支柱１，１間に横方向のロープ材24，24…を多段に設けると共に、それら支柱１，１…の間に網体25を張設し、前記ロープ材24と網体25とにより防護面26を構成し、この防護面26は山側に対応する。また、支柱１，１間に位置して、縦方向の間隔保持具27を設け、この間隔保持具27はフラットバー等からなり、上下多段に設けた前記ロープ材24，24…にクリップ28などにより連結され、それら上下多段のロープ材24，24…の間隔を保持する。 Further, horizontal rope members 24, 24... Are provided in multiple stages between the columns 1, 1 and a net body 25 is stretched between the columns 1, 1,. The protective surface 26 is constituted by the above, and this protective surface 26 corresponds to the mountain side. Further, a vertical interval holder 27 is provided between the support columns 1 and 1, and the interval holder 27 is formed of a flat bar or the like, and the rope members 24, 24. To maintain the interval between the upper and lower multi-stage rope members 24, 24.

前記支柱１の中央上部と斜面22との間には、控えロープ材31が設けられ、この控えロープ材31の基端は、斜面22に固定したアンカー32に連結固定され、その控えロープ材31の先端は、支柱１の中央上部の連結部33に連結固定されている。 A retaining rope member 31 is provided between the center upper portion of the support column 1 and the slope 22, and the proximal end of the retaining rope member 31 is connected and fixed to an anchor 32 fixed to the slope 22. The tip of is connected and fixed to a connecting portion 33 at the upper center of the column 1.

次に、前記構成につき、その作用を説明すると、斜面22の積雪Ｓにより防護面26には、斜面22と略平行な方向の荷重Ｆが加わる。図１１において、一点鎖線は、積雪Ｓによる荷重Ｆが防護面26に加わったときの支柱１に発生する曲げモーメントを示し、支柱１の連結部33より上方の部分には、上端側が後に移動するような曲げモーメントが発生し、支柱１の連結部33と斜面22との間の部分には、支柱１の山側が圧縮領域、谷側が引張領域となる曲げモーメントが発生する。さらに、荷重Ｆの垂直方向分力ｆｖにより、支柱１の連結部33と斜面22との間の部分には、圧縮力が加わる。尚、斜面22より下部においては、支柱１は、山側が引張領域、谷側が圧縮領域となる曲げモーメントが発生する。 Next, the operation of the above configuration will be described. A load F in a direction substantially parallel to the slope 22 is applied to the protective surface 26 by the snow accumulation S on the slope 22. In FIG. 11, the alternate long and short dash line indicates the bending moment generated in the support column 1 when the load F due to the snow cover S is applied to the protective surface 26, and the upper end side moves later in the portion above the connecting portion 33 of the support column 1. Such a bending moment is generated, and in the portion between the connecting portion 33 and the inclined surface 22 of the support column 1, a bending moment is generated in which the peak side of the support column 1 is a compression region and the trough side is a tensile region. Further, a compressive force is applied to the portion between the connecting portion 33 of the support column 1 and the inclined surface 22 by the vertical component force fv of the load F. In the lower part of the slope 22, the column 1 generates a bending moment in which the peak side is a tensile region and the valley side is a compression region.

このような曲げモーメントが発生する支柱１において、該支柱１の山側（一側）に予め引張力を付与しているから、曲げモーメントに対して、鋼棒３による引張力が有効に作用し、強度を向上することができ、しかも、荷重の垂直方向分力ｆｖにより、支柱１の連結部33と斜面22との間の部分には軸方向の圧縮力が加わるから、この圧縮力に対して、前記鋼棒３による引張力が有効に作用する。 In the column 1 in which such a bending moment is generated, a tensile force is applied in advance to the mountain side (one side) of the column 1, so that the tensile force by the steel rod 3 effectively acts on the bending moment, The strength can be improved, and the compressive force in the axial direction is applied to the portion between the connecting portion 33 and the inclined surface 22 of the support column 1 by the vertical component force fv of the load. The tensile force by the steel rod 3 acts effectively.

このように本実施例では、請求項１に対応して、間隔をおいて支柱１，１…を立設すると共に、これら支柱１，１…間に山側Ｙに対応する防護面26を設けた雪崩予防柵において、支柱１は、長さ方向に引張力を導入した鋼管２からなるから、防護面26に積雪荷重が加わった際の支柱１の圧縮領域に、予め引張力を導入しておくことにより、荷重に強い支柱が得られる。 As described above, in this embodiment, in correspondence with claim 1, the support columns 1, 1... Are erected at intervals, and the protective surface 26 corresponding to the mountain side Y is provided between the support columns 1, 1. In the avalanche prevention fence, the support column 1 is composed of a steel pipe 2 introduced with a tensile force in the length direction. Therefore, a tensile force is previously introduced into the compression region of the support column 1 when a snow load is applied to the protective surface 26. As a result, a strut resistant to the load can be obtained.

また、このように本実施例では、請求項５に対応して、支柱１と該支柱１の山側Ｙの斜面22とを控えロープ材31により連結し、前記引張力を鋼管２断面の山側Ｙで長さ方向に導入したから、防護面26に積雪荷重が加わると、支柱１の控えロープ材31の連結位置より下部の山側Ｙに圧縮力が加わるが、この圧縮力に対して前記引張力が対抗することにより、荷重に強い支柱１が得られる。 In this way, in this embodiment, corresponding to claim 5, the strut 1 and the slope 22 on the mountain side Y of the strut 1 are connected by the reed rope material 31, and the tensile force is applied to the mountain side Y of the cross section of the steel pipe 2. Therefore, when a snow load is applied to the protective surface 26, a compressive force is applied to the mountain side Y below the connecting position of the holding rope material 31 of the support column 1, but the tensile force against the compressive force is The struts 1 that are resistant to loads can be obtained.

また、このように本実施例では、請求項７に対応して、鋼管２に配置され該鋼管２の長さ方向に引張力を加える圧縮部材たる鋼棒３を備え、長さ方向に間隔を置いて鋼管２に対をなす支圧部たる支圧板４，４を設け、鋼棒３は、それら支圧板４，４の間隔を広げる方向の弾性復元力を有するから、支圧板４，４間を広げる弾性復元力により鋼管２の長さ方向に引張力を加えることができる。 In this way, in this embodiment, corresponding to claim 7, the steel rod 2 is provided as a compression member that is disposed on the steel pipe 2 and applies a tensile force in the length direction of the steel pipe 2, and is spaced apart in the length direction. Since the steel plate 2 is provided with bearing plates 4 and 4 that are paired to the steel pipe 2 and the steel rod 3 has an elastic restoring force in the direction of widening the interval between the bearing plates 4 and 4, the bearing plates 4 and 4 are A tensile force can be applied in the length direction of the steel pipe 2 by the elastic restoring force that spreads the width.

また、このように本実施例では、請求項８に対応して、隣り合う支柱１，１同士を連結部材23により連結したから、連結部材23により隣り合う支柱１，１間に間隔が保持され、それら支柱１，１と連結部材23とからなる門型構造により強度が向上する。 In this way, in this embodiment, since the adjacent struts 1 and 1 are connected to each other by the connecting member 23 in correspondence with the eighth aspect, the spacing is maintained between the adjacent struts 1 and 1 by the connecting member 23. The strength is improved by the portal structure composed of the support columns 1, 1 and the connecting member 23.

また、実施例上の効果として、圧縮部材たる鋼棒３の鋼管２内位置を位置決めする位置決め部材たる内装体11を備えるから、鋼棒３に圧縮力を加えても、内装体11により位置決めされているため、鋼棒３に座屈が発生することがなく、圧縮された鋼棒３の弾性復元力により鋼管２に引張力を導入することができる。また、圧縮部材たる鋼棒３を長さ方向に圧縮し、この圧縮した鋼棒３の両端側を支圧部たる支圧板４，４に定着するから、鋼棒３の弾性復元力が、支圧板４，４間を広げる方向の力とした働き、鋼管２の長さ方向に引張力を導入することができる。 Further, as an effect of the embodiment, since the inner body 11 is provided as a positioning member for positioning the position of the steel rod 3 as the compression member in the steel pipe 2, even if a compression force is applied to the steel bar 3, the inner body 11 is positioned. Therefore, buckling does not occur in the steel rod 3, and a tensile force can be introduced into the steel pipe 2 by the elastic restoring force of the compressed steel rod 3. Further, the steel rod 3 as the compression member is compressed in the length direction, and both ends of the compressed steel rod 3 are fixed to the bearing plates 4 and 4 as the bearing portions, so that the elastic restoring force of the steel rod 3 is supported. It acts as a force in the direction of spreading the pressure plates 4, 4, and a tensile force can be introduced in the length direction of the steel pipe 2.

図１２〜図１３は、本発明の実施例２を示し、上記実施例１と同一部分に同一符号を付し、その詳細な説明を省略して詳述すると、この例では、前記支柱１を、斜面22の上下で上部支柱１Ｕと下部支柱１Ｓとに分割している。これら上部支柱１Ｕ及び下部支柱１Ｓは、鋼管２と、この鋼管２の長さ方向に引張力を加える圧縮部材たる鋼棒３と、支圧板４，４とをそれぞれ備え、鋼棒３を山側Ｙに配置した前記上部支柱１Ｕと、鋼棒３を谷側Ｔに配置した前記下部支柱１Ｄとの鋼管２，２同士を接合部51において溶接などにより一体化して支柱１を形成する。 FIGS. 12-13 shows Example 2 of this invention, attaches | subjects the same code | symbol to the same part as the said Example 1, and abbreviate | omits the detailed description, In this example, the said support | pillar 1 is shown. The upper column 1U and the lower column 1S are divided above and below the slope 22. The upper strut 1U and the lower strut 1S are each provided with a steel pipe 2, a steel bar 3 as a compression member that applies a tensile force in the length direction of the steel pipe 2, and bearing plates 4 and 4. The steel pipes 2, 2 of the upper support column 1U arranged in the above and the lower support column 1D arranged with the steel rod 3 on the valley side T are integrated by welding or the like at the joint 51 to form the support column 1.

上記のような雪崩予防柵21において、防護面26に積雪荷重が加わると、上部支柱１Ｕの連結部33と斜面22との間に部分には、山側Ｙが圧縮領域、谷側Ｔが引張領域となる曲げモーメントが発生し、逆に斜面22より下の下部支柱１Ｓの上部においては、山側が引張領域、谷側が圧縮領域となる曲げモーメントが発生するが、上部支柱１Ｕでは、山側Ｙに引張力を導入し、逆に下部支柱１Ｓでは、谷側Ｔに引張力を導入することにより、支柱１の耐力を向上することができる。 In the avalanche prevention fence 21 as described above, when a snow load is applied to the protective surface 26, the mountain side Y is a compression region and the valley side T is a tension region between the connecting portion 33 and the slope 22 of the upper support column 1U. On the other hand, in the upper part of the lower support column 1S below the slope 22, a bending moment is generated in which the peak side is a tensile region and the valley side is a compression region. On the contrary, in the lower support column 1S, by introducing a tensile force to the valley side T, the proof stress of the support column 1 can be improved.

このように本実施例では、請求項９に対応して、支柱１は、上部支柱１Ｕと埋設部分の下部支柱１Ｓとからなり、前記引張力を上部支柱１Ｕの鋼管２断面の山側Ｙで長さ方向に導入したから、防護面26に積雪荷重が加わると、上部支柱１Ｕの控えロープ材31連結位置より下側の山側Ｙに圧縮力が加わるが、この圧縮力に対して鋼棒３の引張力が対抗することにより、荷重に強い支柱１が得られる。 Thus, in this embodiment, corresponding to claim 9, the support column 1 is composed of the upper support column 1U and the lower support column 1S of the embedded portion, and the tensile force is long on the mountain side Y of the cross section of the steel pipe 2 of the upper support column 1U. Since it was introduced in the vertical direction, when a snow load is applied to the protective surface 26, a compressive force is applied to the mountain side Y below the connecting position of the stay rope member 31 of the upper support column 1U. When the tensile force opposes, the strut 1 which is strong against the load is obtained.

また、実施例上の効果として、前記下部支柱１Ｓにおいて、鋼棒３を鋼管２内の谷側Ｔに配置して引張力を付与したから、下部支柱１Ｓの耐力を向上することができる。 Moreover, since the steel rod 3 is arrange | positioned in the trough side T in the steel pipe 2, and the tensile force was provided in the said lower support | pillar 1S as an effect on an Example, the yield strength of the lower support | pillar 1S can be improved.

さらに、下部支柱１Ｓにおいて、鋼棒３を設ける代わりに、ＰＣ鋼材15を鋼管２内の山側Ｙに配置して長さ方向の圧縮力を付与してもよいし、または、鋼棒３を鋼管２内の谷側Ｔに配置して引張力を付与すると共に、ＰＣ鋼材15を鋼管２内の山側Ｙに配置して長さ方向の圧縮力を付与してもよい。 Further, in the lower support column 1S, instead of providing the steel bar 3, the PC steel material 15 may be arranged on the mountain side Y in the steel pipe 2 to apply a compressive force in the length direction, or the steel bar 3 may be provided as a steel pipe. The PC steel material 15 may be arranged on the mountain side Y in the steel pipe 2 to apply the compressive force in the length direction while being arranged on the valley side T in 2. FIG.

さらにまた、鋼棒３を設けた上部支柱１Ｕにおいて、ＰＣ鋼材15を鋼管２内の谷側Ｔに配置して長さ方向の圧縮力を付与してもよい。 Furthermore, in the upper support column 1U provided with the steel rod 3, the PC steel material 15 may be arranged on the valley side T in the steel pipe 2 to apply the compressive force in the length direction.

図１４〜図１６は、本発明の実施例３を示し、上記各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と、図１４及び図１５に示すように、この例の支柱１Ａでは、他方の鞘管12Ａに対応して、鋼管２の長さ方向両側に支圧板４，４をそれぞれ設け、支圧板４の挿通孔５から他方の鞘管12ＡにＰＣ鋼材15を挿入し、このＰＣ鋼材15の両端側を外側に引張る引張力を加えて緊張した状態で、それら両端側を定着具16，16により定着し、定着後、前記引張力を解放することにより、支圧板４，４間に圧縮力を付与する。この場合、前記鋼棒３による引張力と前記ＰＣ鋼材15による圧縮力とが釣り合うように設定することにより、鋼管２に加わる軸方向の力を±０にすることができる。 14 to 16 show a third embodiment of the present invention. The same reference numerals are given to the same parts as those in the above-mentioned embodiments, and detailed description thereof will be omitted. As shown in FIGS. Furthermore, in the column 1A of this example, corresponding to the other sheath tube 12A, the supporting plates 4 and 4 are provided on both sides in the longitudinal direction of the steel tube 2, respectively, and the insertion tube 5 of the supporting plate 4 is connected to the other sheath tube 12A. The PC steel material 15 is inserted, and the both ends of the PC steel material 15 are fixed by the fixing tools 16 and 16 in a tensioned state by applying a tensile force that pulls both ends of the PC steel material 15 outward. After fixing, the tensile force is released. As a result, a compressive force is applied between the bearing plates 4 and 4. In this case, the axial force applied to the steel pipe 2 can be set to ± 0 by setting the tensile force of the steel bar 3 and the compressive force of the PC steel material 15 to be balanced.

前記ＰＣ鋼材15は、ＰＣ鋼棒やＰＣ鋼線からなり、前記ＰＣ鋼材15がＰＣ鋼棒であれば、定着具たるナット体をＰＣ鋼棒の両端側に螺合し、前記ＰＣ鋼材15がＰＣ鋼線であれば、楔式の定着具を用いることができる。 The PC steel material 15 is composed of a PC steel rod or a PC steel wire. If the PC steel material 15 is a PC steel rod, a nut body as a fixing tool is screwed to both ends of the PC steel rod, and the PC steel material 15 is If it is a PC steel wire, a wedge-type fixing tool can be used.

図１６は、前記支柱１Ａを用いる雪崩予防柵を示し、この雪崩予防柵21は、控えロープ材31，アンカー32及び連結部33を備えない点と、鋼管２断面の谷側Ｔに鋼棒３を配置して引張力を付与し、鋼管２断面の山側ＹにＰＣ鋼材15を配置して圧縮力を付与した点以外は、上記実施例１と同一構成である。 FIG. 16 shows an avalanche prevention fence using the support column 1A. The avalanche prevention fence 21 is not provided with the cable rope 31, the anchor 32, and the connecting portion 33, and the steel rod 3 on the valley side T of the cross section of the steel pipe 2. Is the same as that of Example 1 except that a tensile force is applied and a PC steel material 15 is disposed on the crest side Y of the cross section of the steel pipe 2 and a compressive force is applied.

したがって、控えロープ材31のないこの例の雪崩予防柵21では、斜面22の積雪Ｓにより防護面26に、斜面22と略平行な方向の荷重Ｆが加わると、支柱１Ａの上端を谷側Ｔに倒す力が働き、支柱の谷側Ｔが圧縮領域、山側Ｙが引張領域となる曲げモーメントが発生する。 Therefore, in the avalanche prevention fence 21 of this example without the reserve rope material 31, when a load F in a direction substantially parallel to the slope 22 is applied to the protective surface 26 due to the snow accumulation S on the slope 22, the upper end of the support 1 A is placed on the valley side T. A bending moment is generated in which the trough side T of the support column is a compression region and the crest side Y is a tension region.

このような曲げモーメントが発生する支柱１Ａにおいて、支柱１Ａの山側（一側）に予め圧縮力を付与し、支柱１Ａの谷側に予め引張力を付与しているから、曲げモーメントに対して、ＰＣ鋼材15の圧縮力と鋼棒３の引張力が有効に作用し、強度を向上することができる。 In the column 1A in which such a bending moment is generated, a compressive force is applied in advance to the peak side (one side) of the column 1A, and a tensile force is applied in advance to the valley side of the column 1A. The compressive force of the PC steel material 15 and the tensile force of the steel rod 3 act effectively, and the strength can be improved.

このように本実施例においても、上記各実施例と同様な作用・効果を奏する。 As described above, this embodiment also has the same operations and effects as the above embodiments.

加えて、このように本実施例では、請求項２に対応して、間隔をおいて支柱１Ａ，１Ａ…を立設すると共に、これら支柱１Ａ，１Ａ…間に山側Ｙに対応する防護面26を設けた雪崩予防柵21において、支柱１Ａは、長さ方向に圧縮力を導入した鋼管２からなるから、防護面26に積雪荷重が加わった際の支柱１Ａの引張領域（鋼管２断面の山側Ｙ）に、予め圧縮力を導入しておくことにより、荷重に強い支柱１Ａが得られる。 In addition, in this embodiment, in accordance with the second aspect, the support posts 1A, 1A... Are erected at intervals, and the protective surface 26 corresponding to the mountain side Y between these support posts 1A, 1A. In the avalanche prevention fence 21 provided with the support column 1A, the support column 1A is composed of a steel pipe 2 introduced with a compressive force in the length direction. Therefore, the tension region of the support column 1A when a snow load is applied to the protective surface 26 (the mountain side of the cross section of the steel pipe 2) By introducing a compressive force into Y) in advance, a strut 1A that is resistant to load can be obtained.

また、このように本実施例では、請求項３に対応して、前記引張力を鋼管２断面の一側である谷側Ｔに導入し、鋼管２断面の他側たる山側Ｙに長さ方向の圧縮力を導入したから、曲げモーメントにより発生する断面一側の圧縮力と断面他側の引張力とに対して、予め導入した断面一側の引張力と断面他側の圧縮力とが対抗する。 In this way, in this embodiment, corresponding to claim 3, the tensile force is introduced into the valley side T which is one side of the cross section of the steel pipe 2, and the length direction is applied to the mountain side Y which is the other side of the cross section of the steel pipe 2. Therefore, the previously introduced tensile force on one side of the cross section and the compressive force on the other side of the cross section are opposed to the compressive force on the other side of the cross section and the tensile force on the other side of the cross section generated by the bending moment. To do.

また、このように本実施例では、請求項４に対応して、前記引張力と前記圧縮力を略同一に設定したから、鋼管２における長さ方向の軸力が釣り合い、鋼管２の長さ方向に軸力が発生することがない。 In this way, in this embodiment, the tensile force and the compressive force are set to be substantially the same in correspondence with the fourth aspect, so that the axial force in the length direction of the steel pipe 2 is balanced, and the length of the steel pipe 2 is No axial force is generated in the direction.

また、このように本実施例では、鋼管２の断面一側に圧縮部材たる鋼棒３を配置し、鋼管２の断面他側に引張部材たるＰＣ鋼材15により圧縮力たる緊張力を付与したから、曲げモーメントにより発生する断面一側の圧縮力と断面他側の引張力とに対して、鋼棒３の引張力とＰＣ鋼材15の緊張力とが対抗する。 Further, in this embodiment, the steel rod 3 as the compression member is arranged on one side of the cross section of the steel pipe 2 and tension force as a compression force is applied to the other side of the cross section of the steel pipe 2 by the PC steel material 15 as the tension member. The tensile force of the steel bar 3 and the tension force of the PC steel material 15 oppose the compressive force on one side of the cross section and the tensile force on the other side of the cross section generated by the bending moment.

また、このように本実施例では、鋼管２の断面一側に圧縮部材たる鋼棒３を配置し、鋼管２の断面他側に引張部材たるＰＣ鋼材15により緊張力を付与し、前記引張力と前記緊張力を略同一に設定するから、長さ方向の軸力が釣り合い、鋼管２の長さ方向に軸力が発生することがない。 In this way, in this embodiment, the steel rod 3 as the compression member is arranged on one side of the cross section of the steel pipe 2, and the tensile force is applied to the other side of the cross section of the steel pipe 2 by the PC steel material 15 as the tensile member. Therefore, the axial force in the length direction is balanced and the axial force is not generated in the length direction of the steel pipe 2.

また、この支柱１Ａの製造方法において、圧縮部材たる鋼棒３を長さ方向に圧縮し、この圧縮した鋼棒３の両端側を支圧板４，４に定着するから、鋼棒３の弾性復元力が、支圧板４，４間を広げる方向の力とした働き、鋼管２の長さ方向に引張力を導入でき、また、引張部材たるＰＣ鋼材15を長さ方向に引張って緊張し、この緊張したＰＣ鋼材15の両端側を支圧部たる支圧板４，４に定着するから、ＰＣ鋼材15の弾性復元力が、支圧板４，４間を狭める方向の力とした働き、鋼管２の長さ方向に圧縮力を導入できる。 Further, in this method of manufacturing the strut 1A, the steel rod 3 as the compression member is compressed in the length direction, and both ends of the compressed steel rod 3 are fixed to the bearing plates 4 and 4, so that the elastic recovery of the steel rod 3 is achieved. The force acts as a force in the direction of expanding the bearing plates 4 and 4 and can introduce a tensile force in the length direction of the steel pipe 2, and the PC steel material 15 as a tension member is pulled in the length direction to be tensioned. Since both ends of the strained PC steel material 15 are fixed to the bearing plates 4 and 4 which are the bearing members, the elastic restoring force of the PC steel material 15 acts as a force in a direction to narrow the space between the bearing plates 4 and 4, Compressive force can be introduced in the length direction.

図１７は、本発明の実施例４を示し、上記各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と、この例の雪崩予防柵21の支柱１Ｃは、鋼管２の谷側Ｔに前記ＰＣ鋼材15を配置し、このＰＣ鋼材15により鋼管２の谷側Ｔに該鋼管２の長さ方向の圧縮力を付与しており、具体的には、実施例３と同様に、鋼管２の長さ方向両側に支圧板４，４をそれぞれ設け、支圧板４の挿通孔５から他方の鞘管12ＡにＰＣ鋼材15を挿入し、このＰＣ鋼材15の両端側を外側に引張る引張力を加えて緊張した状態で、それら両端側を定着具16，16により定着し、定着後、前記引張力を解放することにより、支圧板４，４間に圧縮力を付与している。 FIG. 17 shows a fourth embodiment of the present invention. The same reference numerals are assigned to the same parts as those in the above-described embodiments, and the detailed description thereof is omitted. The PC steel material 15 is disposed on the valley side T of the steel pipe 2, and a compressive force in the length direction of the steel pipe 2 is applied to the valley side T of the steel pipe 2 by the PC steel material 15. As in Example 3, support plates 4 and 4 are provided on both sides of the steel pipe 2 in the length direction, and a PC steel material 15 is inserted into the other sheath tube 12A from the insertion hole 5 of the support plate 4, and both ends of the PC steel material 15 are inserted. In a state of tension by applying a tensile force that pulls the outer side outward, the both ends are fixed by the fixing tools 16 and 16, and after the fixing, the tensile force is released so that a compressive force is applied between the supporting plates 4 and 4. Has been granted.

したがって、ＰＣ鋼材15により鋼管２の谷側Ｔが長さ方向に圧縮され、これにより鋼管２の山側Ｔが長さ方向に引張られるから、積雪Ｓ荷重を受けた際に発生する曲げモーメントに対して、ＰＣ鋼材15の圧縮力が有効に作用し、強度を向上することができる。 Therefore, the trough side T of the steel pipe 2 is compressed in the length direction by the PC steel material 15, and this causes the crest side T of the steel pipe 2 to be pulled in the length direction. Thus, the compressive force of the PC steel material 15 acts effectively, and the strength can be improved.

加えて、このように本実施例では、請求項２に対応して、間隔をおいて支柱１Ｃ，１Ｃ…を立設すると共に、これら支柱１Ｃ，１Ｃ…間に山側Ｙに対応する防護面26を設けた雪崩予防柵21において、支柱１Ｃは、長さ方向に圧縮力を導入した鋼管２からなるから、防護面26に積雪Ｓ荷重が加わった際の支柱１Ｃの引張領域に、予め圧縮力を導入しておくことにより、荷重に強い支柱１Ｃが得られる。 In addition, in this embodiment, in accordance with the second aspect, the support posts 1C, 1C,... Are erected at intervals, and the protective surface 26 corresponding to the mountain side Y is provided between the support posts 1C, 1C,. In the avalanche prevention fence 21 provided with the support 1C, the support 1C is made of a steel pipe 2 into which a compressive force is introduced in the length direction, so that the compressive force is applied in advance to the tensile region of the support 1C when a snow S load is applied to the protective surface 26. By introducing, a column 1C resistant to the load can be obtained.

また、このように本実施例では、請求項６に対応して、支柱１Ｃと該支柱１Ｃ山側の斜面22とを控えロープ材31により連結し、前記圧縮力を鋼管２断面の谷側Ｔで長さ方向に導入したから、防護面26に積雪荷重Ｓが加わると、支柱１Ｃの控えロープ材31の連結位置より下部の山側Ｙに圧縮力が加わるが、この圧縮力に対して谷側Ｔの圧縮力が対抗することにより、荷重に強い支柱１Ｃが得られる。 In this way, in this embodiment, corresponding to claim 6, the strut 1C and the slope 22 on the mountain side of the strut 1C are connected by the retaining rope material 31, and the compressive force is applied at the trough side T of the cross section of the steel pipe 2. Since it is introduced in the length direction, when a snow load S is applied to the protective surface 26, a compressive force is applied to the mountain side Y below the connecting position of the stay rope material 31 of the support column 1C. As a result, the struts 1C resistant to the load can be obtained.

図１８は、本発明の実施例５を示し、上記各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と、この例では、前記支柱１Ｃを、斜面22の上下で上部支柱１Ｕと下部支柱１Ｓとに分割している。これら上部支柱１Ｕ及び下部支柱１Ｓは、鋼管２と、この鋼管２の長さ方向に圧縮力を加える引張部材たるＰＣ鋼材15と、支圧板４，４とをそれぞれ備え、ＰＣ鋼材15を谷側Ｔに配置した前記上部支柱１Ｕと、ＰＣ鋼材15を山側Ｙに配置した前記下部支柱１Ｄとの鋼管２，２同士を接合部51において溶接などにより一体化して支柱１を形成する。 FIG. 18 shows a fifth embodiment of the present invention. The same reference numerals are given to the same parts as those of the above-described embodiments, and detailed description thereof will be omitted. In this example, the column 1C is connected to the inclined surface 22 in FIG. Are divided into an upper support column 1U and a lower support column 1S. The upper strut 1U and the lower strut 1S are each provided with a steel pipe 2, a PC steel material 15 as a tensile member for applying a compressive force in the length direction of the steel pipe 2, and bearing plates 4 and 4, and the PC steel material 15 is disposed on the valley side. The steel columns 2 and 2 of the upper support column 1U arranged at T and the lower support column 1D arranged at the mountain side Y of the PC steel material 15 are integrated by welding or the like at the joint 51 to form the support column 1.

上記のような雪崩予防柵21において、防護面26に積雪荷重が加わると、上部支柱１Ｕの連結部33と斜面22との間に部分には、山側Ｙが圧縮領域、谷側Ｔが引張領域となる曲げモーメントが発生し、逆に斜面22より下の下部支柱１Ｓの上部においては、山側Ｙが引張領域、谷側Ｔが圧縮領域となる曲げモーメントが発生するが、上部支柱１Ｕでは、谷側Ｔに圧縮力を導入し、逆に下部支柱１Ｓでは、山側Ｙに引張力を導入することにより、支柱１Ｃの耐力を向上することができる。 In the avalanche prevention fence 21 as described above, when a snow load is applied to the protective surface 26, the mountain side Y is a compression region and the valley side T is a tension region between the connecting portion 33 and the slope 22 of the upper support column 1U. On the other hand, in the upper part of the lower support column 1S below the slope 22, a bending moment is generated in which the peak side Y is a tension region and the valley side T is a compression region. By introducing a compressive force on the side T and, conversely, in the lower column 1S, a tensile force is introduced on the mountain side Y, whereby the proof stress of the column 1C can be improved.

このように本実施例では、請求項１０に対応して、支柱１Ｃは、上部支柱１Ｕと埋設部分の下部支柱１Ｓとからなり、前記圧縮力を上部支柱１Ｕの鋼管２断面の谷側Ｔで長さ方向に導入したから、防護面26に積雪荷重が加わると、上部支柱１Ｕの控えロープ材31連結位置より下側の山側Ｙに圧縮力が加わるが、この圧縮力に対してＰＣ鋼材15の圧縮力が対抗することにより、荷重に強い支柱１Ｃが得られる。 Thus, in this embodiment, corresponding to claim 10, the support column 1C is composed of the upper support column 1U and the lower support column 1S of the embedded portion, and the compressive force is applied to the valley side T of the cross section of the steel pipe 2 of the upper support column 1U. Since it was introduced in the length direction, when a snow load is applied to the protective surface 26, a compressive force is applied to the mountain side Y below the connecting position of the upper rope 31 in the upper support column 1U. As a result, the struts 1C resistant to the load can be obtained.

また、実施例上の効果として、前記下部支柱１Ｓにおいて、ＰＣ鋼材15を鋼管２内の山側Ｙに配置して圧縮力を付与したから、下部支柱１Ｓの耐力を向上することができる。 Moreover, since the PC steel material 15 is arrange | positioned in the mountain side Y in the steel pipe 2, and the compressive force was provided in the said lower support | pillar 1S as an effect on an Example, the yield strength of the lower support | pillar 1S can be improved.

さらに、下部支柱１Ｓにおいて、ＰＣ鋼材15を設ける代わりに、鋼棒３を鋼管２内の谷側Ｔに配置して長さ方向の引張力を付与してもよいし、または、鋼棒３を鋼管２内の谷側Ｔに配置して引張力を付与すると共に、ＰＣ鋼材15を鋼管２内の山側Ｙに配置して長さ方向の圧縮力を付与してもよい。 Further, in the lower support column 1S, instead of providing the PC steel material 15, the steel rod 3 may be disposed on the valley side T in the steel pipe 2 to apply a tensile force in the length direction, or the steel rod 3 may be While arrange | positioning to the trough side T in the steel pipe 2, you may provide a tensile force, and you may arrange | position the PC steel material 15 in the mountain side Y in the steel pipe 2, and may provide the compressive force of a length direction.

図１９〜図２２は、本発明の実施例６を示し、上記各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と、この例では、支柱１Ｂの内装体11は、鞘管12，12Ａの間で鋼管２の内周面に等間隔で、図中右側に鞘管12Ｂ，12Ｃ，12Ｄを配置し、図中左側に鞘管12Ｂ´，12Ｃ´，12Ｄ´を配置し、すなわち鞘管12から反時計回り方向に、鞘管12Ｂ，12Ｃ，12Ｄ，12Ａ，12Ｄ´，12Ｃ´，12Ｂ´を配置している。 19 to 22 show a sixth embodiment of the present invention. The same reference numerals are given to the same parts as those of the above-described embodiments, and detailed description thereof will be omitted. In this example, the interior of the column 1B is shown. The body 11 is arranged at equal intervals on the inner peripheral surface of the steel pipe 2 between the sheath pipes 12 and 12A, and the sheath pipes 12B, 12C and 12D are arranged on the right side in the figure, and the sheath pipes 12B ', 12C', 12D ′ is disposed, that is, the sheath tubes 12B, 12C, 12D, 12A, 12D ′, 12C ′, and 12B ′ are disposed in the counterclockwise direction from the sheath tube 12.

また、それら鞘管12，12Ｂ，12Ｃ，12Ｄ，12Ａ，12Ｄ´，12Ｃ´，12Ｂ´にそれぞれ対応して、前記鋼管２の長さ方向両側に、支圧部たる支圧板４Ａ，４Ａを設け、この支圧板４Ａは板片状をなし、その支圧板４Ａの外側の円弧部８を鋼管２の内周面に溶着などにより固着し、円周方向に隣り合う支圧板４Ａ，４Ａの間には隙間からなる縁切り部17が設けられている。 Further, corresponding to the sheath tubes 12, 12B, 12C, 12D, 12A, 12D ', 12C', and 12B ', the supporting plates 4A and 4A serving as the supporting portions are provided on both sides in the length direction of the steel tube 2, respectively. The bearing plate 4A is in the form of a plate, and the arc portion 8 outside the bearing plate 4A is fixed to the inner peripheral surface of the steel pipe 2 by welding or the like, and between the bearing plates 4A, 4A adjacent in the circumferential direction. Is provided with an edge cut portion 17 formed of a gap.

そして、鋼管２の内周面に略沿って等間隔に配置した複数の鞘管12，12Ｂ，12Ｃ，12Ｄ，12Ａ，12Ｄ´，12Ｃ´，12Ｂ´に、前記鋼棒３とＰＣ鋼材15を選択的に挿入し、その鋼棒３により支圧板４Ａ，４Ａの間を広げる引張力を付与し、そのＰＣ鋼材15により支圧板４Ａ，４Ａの間を狭める緊張力を付与し、鋼管２の円周位置の任意の位置に引張力と緊張力を付与することができる。 Then, the steel rod 3 and the PC steel material 15 are placed on a plurality of sheath tubes 12, 12B, 12C, 12D, 12A, 12D ', 12C', 12B 'arranged substantially equidistantly along the inner peripheral surface of the steel pipe 2. The steel tube 3 is applied with a tensile force to spread between the support plates 4A, 4A, and the PC steel material 15 is applied with a tension force to narrow the space between the support plates 4A, 4A. A tensile force and a tension force can be applied to any position of the circumferential position.

例えば、図２２に示すように、支柱１Ｂ，１を連結する連結部材がない場合、右側の端末の支柱１Ｂにおいては、複数のロープ材24，24…の張力により、端末の支柱１の上部を図中、左側に倒そうとする力が加わる。 For example, as shown in FIG. 22, in the case where there is no connecting member for connecting the struts 1B, 1, the upper end of the strut 1 of the terminal is supported by the tension of the plurality of rope members 24, 24. In the figure, a force is applied to the left side.

そこで、山側の鞘管12に前記鋼棒３を挿入し、対応する支圧板４Ａ，４Ａの間を広げる引張力を付与すると共に、谷側の鞘管12ＡにＰＣ鋼材15を挿入し、支圧板４Ａ，４Ａの間に緊張力を導入して積雪Ｓ荷重に対抗し、また、の鋼管２内で、ロープ材24からの張力が加わる側の鞘管12Ｃ´に前記鋼棒３を挿入し、対応する支圧板４Ａ，４Ａの間を広げる引張力を付与することにより、前記ロープ材24，24の張力に対応することができる。 Therefore, the steel rod 3 is inserted into the mountain-side sheath tube 12 to give a tensile force to spread between the corresponding bearing plates 4A, 4A, and the PC steel material 15 is inserted into the valley-side sheath tube 12A, 4A, 4A, a tension force is introduced to counter the snow load S, and the steel rod 3 is inserted into the sheath tube 12C ′ to which the tension from the rope member 24 is applied in the steel tube 2; The tension of the rope members 24, 24 can be dealt with by applying a tensile force that spreads between the corresponding bearing plates 4A, 4A.

尚、同様に図２２中、左側の端末の支柱１Ｂにおいては、図中、右側に倒そうとする力が加わから、ロープ材24からの張力が加わる側の鞘管12Ｃに鋼棒３を挿入して引張力を付与する。 Similarly, in FIG. 22, in the left end support column 1B, the steel rod 3 is inserted into the sheath tube 12C on the side to which the tension from the rope member 24 is applied because the force to fall on the right side in the drawing is applied. To give a tensile force.

このように本実施例では、使用状態に合せて、鋼管２断面の任意の位置に長さ方向の引張力と緊張力とを導入することができる。 As described above, in this embodiment, the tensile force and the tension force in the length direction can be introduced at an arbitrary position on the cross section of the steel pipe 2 in accordance with the use state.

また、前記支柱１，１Ａ，１Ｂ，１Ｃにおいて、前記鋼管２の内部にコンクリート等の充填材（図示せず）を充填した充填鋼管を用いることも可能であるが、充填材を充填しない支柱１，１Ａ，１Ｂ，１Ｃは軽量であり、施工が容易となる利点があり、このため、鋼管２の内部には充填材を充填していない。 Further, in the support columns 1, 1 A, 1 B, and 1 C, it is possible to use a filled steel pipe in which a filler (not shown) such as concrete is filled in the steel pipe 2, but the support column 1 not filled with a filler. , 1A, 1B, and 1C are light in weight and have an advantage that the construction is easy. Therefore, the steel pipe 2 is not filled with a filler.

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

本発明の実施例１を示す支柱の断面図である。It is sectional drawing of the support | pillar which shows Example 1 of this invention. 同上、図１のＡ−Ａ線断面図である。FIG. 2 is a cross-sectional view taken along line AA in FIG. 同上、支圧板の正面図である。It is a front view of a bearing plate same as the above. 同上、鋼棒及び内装体の側面図である。It is a side view of a steel bar and an interior body same as the above. 同上、内装体の正面図である。It is a front view of an interior body same as the above. 同上、鋼管端部側の拡大断面図であり、鋼棒を圧縮する前の状態を示す。It is an expanded sectional view of a steel pipe end side same as the above, and shows the state before compressing a steel bar. 同上、鋼管端部側の拡大断面図であり、鋼棒を圧縮した後の状態を示す。It is an expanded sectional view by the side of a steel pipe end same as the above, and shows the state after compressing a steel bar. 同上、支柱の概略説明図である。It is a schematic explanatory drawing of a support | pillar same as the above. 同上、支柱に用いた雪崩防護柵の断面図である。It is sectional drawing of the avalanche protection fence used for the support | pillar same as the above. 同上、雪崩防護柵の正面図である。It is a front view of an avalanche protection fence same as the above. 同上、支柱のモーメント図である。It is the moment figure of a support | pillar same as the above. 本発明の実施例２を示す雪崩防護柵の断面図である。It is sectional drawing of the avalanche protection fence which shows Example 2 of this invention. 同上、支柱のモーメント図である。It is the moment figure of a support | pillar same as the above. 本発明の実施例３を示す支柱の断面図である。It is sectional drawing of the support | pillar which shows Example 3 of this invention. 同上、鋼材端部の拡大断面図である。It is an enlarged sectional view of a steel material end part same as the above. 同上、雪崩防護柵の断面図である。It is sectional drawing of an avalanche protection fence same as the above. 本発明の実施例４を示す雪崩防護柵の断面図である。It is sectional drawing of the avalanche protection fence which shows Example 4 of this invention. 本発明の実施例５を示す雪崩防護柵の断面図である。It is sectional drawing of the avalanche protection fence which shows Example 5 of this invention. 本発明の実施例６を示す一部を切欠いた耐荷材の斜視図である。It is a perspective view of the load-bearing material which notched a part which shows Example 6 of this invention. 同上、内装材の正面図である。It is a front view of an interior material same as the above. 同上、鋼管端部の正面図である。It is a front view of a steel pipe edge part same as the above. 同上、雪崩防護柵の正面図である。It is a front view of an avalanche protection fence same as the above.

Explanation of symbols

１，１Ａ，１Ｂ，１Ｃ支柱
１Ｕ上部支柱
１Ｓ下部支柱
２鋼管
３鋼棒（圧縮部材）
４，４Ａ支圧板（支圧部）
11 内装体（位置決め部材）
15 ＰＣ鋼材（引張部材）
21 雪崩予防柵
23 連結部材
26 防護面
31 控えロープ材
33 連結部
51 接合部

1, 1A, 1B, 1C Column 1U Upper column 1S Lower column 2 Steel pipe 3 Steel rod (compression member)
4, 4A bearing plate (bearing section)
11 Interior body (positioning member)
15 PC steel (tensile member)
21 Avalanche prevention fence
23 Connecting members
26 Protective surfaces
31 Retaining rope material
33 Connection
51 joints

Claims

In the avalanche prevention fence which provided the protective surface corresponding to the mountain side between the pillars while standing upright at intervals, the pillars are made of steel pipes introduced with a tensile force in the length direction. Avalanche prevention fence.

In the avalanche prevention fence which provided the protective surface corresponding to the mountain side between the pillars while standing upright at intervals, the pillars are made of steel pipes introduced with compressive force in the length direction. Avalanche prevention fence.

The avalanche prevention fence according to claim 1, wherein the tensile force is introduced to one side of the steel pipe cross section and a compressive force in a length direction is introduced to the other side of the steel pipe cross section.

The avalanche prevention fence according to claim 3, wherein the tensile force and the compressive force are set substantially the same.

The avalanche prevention fence according to claim 1, wherein the support column and the slope on the support mountain side are connected by a reed rope material, and the tensile force is introduced in the length direction on the mountain side of the steel pipe cross section.

The avalanche prevention fence according to claim 2, wherein the support column and the slope of the support mountain side are connected by a reed rope material, and the compressive force is introduced in the length direction on the valley side of the steel pipe cross section.

A compression member that is disposed on the steel pipe and applies a tensile force in the length direction of the steel pipe is provided, and a pressure-bearing portion that is paired with the steel pipe is provided at intervals in the length direction, and the compression member includes the pressure-bearing portions. The avalanche prevention fence according to claim 1, wherein the fence has an elastic restoring force in a direction of widening the interval.

The avalanche prevention fence according to any one of claims 1 to 7, wherein the adjacent struts are connected by a connecting member.

6. The avalanche prevention fence according to claim 5, wherein the strut includes an upper strut and a lower strut of an embedded portion, and the tensile force is introduced in a length direction on a mountain side of a steel pipe cross section of the upper strut.

7. The avalanche prevention fence according to claim 6, wherein the support column is composed of an upper support column and a lower support column of an embedded portion, and the compressive force is introduced in a length direction on a trough side of a steel pipe cross section of the upper support column.