JP4714204B2 - Protective body - Google Patents

Protective body Download PDF

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JP4714204B2
JP4714204B2 JP2007285574A JP2007285574A JP4714204B2 JP 4714204 B2 JP4714204 B2 JP 4714204B2 JP 2007285574 A JP2007285574 A JP 2007285574A JP 2007285574 A JP2007285574 A JP 2007285574A JP 4714204 B2 JP4714204 B2 JP 4714204B2
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support
column
protective body
pillar
ground
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JP2009114635A (en
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満明 山本
陽一 西田
智弘 藤井
昭一 井上
利充 野村
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Protec Engineering Inc
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Protec Engineering Inc
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Description

本発明は、防護体に関する。   The present invention relates to a protective body.

従来、この種の防護体として、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、前記支柱の上部と支柱前側の斜面とを控えロープ材により連結した防護柵（例えば、特許文献２）などが知られている。
特開平６−１７３２２１号公報 特開２０００−２７３８２７号公報 Conventionally, as this type of protection body, protective fences (shields provided with wire nets provided with struts at predetermined intervals, with horizontal rope members between the struts, and between the struts hung on the horizontal rope members) 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 in which the upper part of the column and the slope on the front side of the column are connected by a reed rope material ( For example, Patent Document 2) is known.
JP-A-6-173221 Japanese Patent Laid-Open No. 2000-273727

上記の防護柵のように、支柱上部に控えロープ材を連結した構造では、斜面の積雪により控えロープ材に荷重が加わると、該控えロープ材が撓んで伸びを生じ、支柱を支持する支持張力が低下する問題がある。   As in the case of the above-mentioned protective fence, in the structure in which the stay rope material is connected to the upper part of the support column, when the load is applied to the stay rope material due to the snow on the slope, the stay rope material is bent and stretched, and the support tension that supports the support column There is a problem that decreases.

また、支柱の下部を地中に建て込めことにより、支柱の基礎構造を簡略化することができるが、地中に埋設する地中下部の部分だけ支柱の全長が長くなるため、斜面への搬入や据付け作業が煩雑になることが予想される。   In addition, it is possible to simplify the foundation structure of the column by installing the lower part of the column in the ground, but the entire length of the column only in the lower part of the underground that is buried in the ground will increase the length of the column. And installation work is expected to be complicated.

そこで、本発明は、控えロープ材を備えた防護体において、基礎を不要とし、安定性に優れた防護体を提供することを目的とする。   SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a protective body that is superior in stability and does not require a foundation in a protective body provided with a constraining rope material.

請求項１の発明は、設置場所に立設する支柱構造と、この支柱構造の地上部と該支柱構造の山側と連結する控えロープ材とを備えた防護体において、前記支柱構造は、前記控えロープ材を連結し前記地上部となる支柱上部と、前記設置場所に形成した掘削孔に建て込んで地中に固定する支柱下部と、前記設置場所の表面近傍でそれら支柱上部と支柱下部とを接合する接合手段とを備え、前記接合手段が面積拡大部を有し、前記支柱上部より前記支柱下部の断面性能が小さく、前記接合手段が、設計積雪深さの積雪により等分布荷重を受けた前記支柱構造の曲げモーメントの反曲点に位置するように、前記支柱上部の高さの１/２以下、１/４以上の高さ位置に前記控えロープ材を連結したものである。   According to a first aspect of the present invention, there is provided a protective body including a support structure standing upright at an installation location, a ground portion of the support structure, and a storage rope member connected to a mountain side of the support structure. Connecting the rope material, the upper part of the pillar that becomes the ground part, the lower part of the pillar that is built in the excavation hole formed in the installation place and fixed in the ground, the upper part of the pillar and the lower part of the pillar near the surface of the installation place A joining means for joining, the joining means has an area enlarged portion, the cross-sectional performance of the lower part of the pillar is smaller than the upper part of the pillar, and the joining means has received an evenly distributed load due to snow accumulation of a designed snow depth The retainer rope material is connected to a height position of 1/2 or less and 1/4 or more of the height of the upper portion of the support so as to be located at the inflection point of the bending moment of the support structure.

また、請求項２の発明は、前記支柱上部にプレストレストを導入したものである。   In the invention of claim 2, a prestress is introduced into the upper portion of the support.

また、請求項３の発明は、前記支柱上部と前記支柱下部は管材からなり、前記支柱下部は前記支柱上部より直径が小さいものである。   According to a third aspect of the present invention, the upper part of the support and the lower part of the support are made of a pipe material, and the lower part of the support is smaller in diameter than the upper part of the support.

また、請求項４の発明は、前記支柱下部の外径が円形である。   According to a fourth aspect of the present invention, the outer diameter of the lower portion of the column is circular.

また、請求項５の発明は、前記支柱上部が中空部材からなり、この中空部材の内部にコンクリートを充填したものである。   According to a fifth aspect of the present invention, the upper portion of the column is made of a hollow member, and the inside of the hollow member is filled with concrete.

請求項１の構成によれば、控えロープ材を支柱上部の低い位置に連結したから、積雪荷重が加わっても、接合手段におけるモーメントを小さく抑えることができ、また、従来に比べて、積雪荷重による控えロープ材における伸びの発生を抑制できる。   According to the configuration of the first aspect, since the stay rope material is connected to the lower position of the upper portion of the support column, even if a snow load is applied, the moment in the joining means can be suppressed to a small level, and the snow load is smaller than that in the past. It is possible to suppress the occurrence of elongation in the holding rope material.

そして、支柱構造を支柱上部と支柱下部とに分割したから、現場への搬入作業が容易となり、また、条件により支柱上部と支柱下部の径や構造，強度設定などを変えることもでき、さらに、支柱下部を建て込むことにより、基礎が不要あるいは簡易なものとなる。   And since the strut structure is divided into the strut upper part and the strut lower part, the work to carry in to the site becomes easy, and the diameter, structure, strength setting etc. of the upper strut and lower strut can be changed according to the conditions, By building the lower part of the column, the foundation is unnecessary or simple.

また、請求項１の構成によれば、接合手段の位置におけるモーメントが小さくなり、支柱上部と支柱下部の接合箇所に無理な力が加わることがない。   Moreover, according to the structure of Claim 1, the moment in the position of a joining means becomes small, and an excessive force is not added to the joining location of a support | pillar upper part and a support | pillar lower part.

また、請求項１の構成によれば、支柱下部を地中に固定する際、支柱下部の長さより深い掘削孔に、支柱下部を挿入しても、面積拡大部がストッパーとなって接合箇所が地表面に位置決めされる。   According to the configuration of claim 1, when the lower part of the support is fixed in the ground, even if the lower part of the support is inserted into the excavation hole deeper than the length of the lower part of the support, the area enlarged portion serves as a stopper and the joining portion is Positioned on the ground surface.

また、請求項１の構成によれば、支柱下部の部材を簡易なものにできるので、コストダウンなどを図ることができる。   Moreover, according to the structure of Claim 1, since the member of the support | pillar lower part can be made simple, cost reduction etc. can be aimed at.

また、請求項２の構成によれば、支柱上部に比べて強度を要さない支柱下部には、プレストレスを導入せずに、強度が必要な支柱上部にプレストレスを導入して強度を向上できる。   Further, according to the configuration of the second aspect, the strength is improved by introducing prestress to the upper portion of the supporting column requiring strength without introducing prestress to the lower portion of the supporting column which does not require strength compared to the upper portion of the supporting column it can.

また、請求項３の構成によれば、支柱上部に比べて強度を要さない支柱下部の部材を小さくでき、かつ、建て込みの際の掘削孔の直径が小さく済むため、施工コストを抑制することができる。   Moreover, according to the structure of Claim 3, since the member of the support | pillar lower part which does not require intensity | strength compared with the support | pillar upper part can be made small, and the diameter of the excavation hole at the time of erection is small, construction cost is suppressed. be able to.

また、請求項４の構成によれば、角型などに比べて、建て込みの際の掘削孔の直径を小さくすることができる。   Moreover, according to the structure of Claim 4, compared with a square shape etc., the diameter of the excavation hole at the time of erection can be made small.

また、請求項５の構成によれば、支柱上部の強度を向上することができる。   Moreover, according to the structure of Claim 5, the intensity | strength of a support | pillar upper part can be improved.

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防護体を採用することにより、従来にない防護体が得られ、その防護体について記述する。   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, an unprecedented protective body is obtained by adopting a new protective body different from the conventional one, and the protective body will be described.

以下、本発明の実施例１について、図１〜図３を参照して説明する。図１に示すように、防護体である雪崩予防柵１は、設置場所である斜面２に所定間隔を置いて複数の支柱構造３，３…を設け、この支柱構造３の地上部と斜面２の前側とを控えロープ材４により連結し、それら支柱構造３，３…の間に、可撓性を有する防護面を構成する横ロープ材５と網体６を設けてなる。   Embodiment 1 of the present invention will be described below with reference to FIGS. As shown in FIG. 1, an avalanche prevention fence 1 as a protective body is provided with a plurality of support structures 3, 3... Are connected to each other by a constraining rope material 4, and a horizontal rope material 5 and a net 6 constituting a protective surface having flexibility are provided between the support structures 3, 3.

尚、支柱構造３，３…間に、前記横ロープ材５が設けられると共に、網体６が張設されている。   The horizontal rope member 5 is provided between the support structures 3, 3,.

前記支柱構造３は、地上部となる支柱上部11と地中部となる支柱下部12とを備え、これら支柱上部11と支柱下部12の接合箇所に、接合手段たるフランジ13，13をそれぞれ設けてなり、それらフランジ13，13のボルト挿通孔（図示せず）にボルト14を挿通し、このボルト14にナットを螺合してフランジ13，13を締め付けることにより、支柱上部11の下部と支柱下部12の上部が接合される。尚、接合箇所は斜面２の表面近傍が好ましい。   The strut structure 3 includes a strut upper portion 11 serving as a ground portion and a strut lower portion 12 serving as a ground portion, and flanges 13 and 13 serving as joining means are respectively provided at joint portions of the strut upper portion 11 and the strut lower portion 12. The bolts 14 are inserted into bolt insertion holes (not shown) of the flanges 13 and 13, and nuts are screwed into the bolts 14 to tighten the flanges 13 and 13. The upper part of is joined. In addition, the joining location is preferably near the surface of the slope 2.

前記控えロープ材４は、ワイヤーロープなどからなり、その一端を前記支柱上部11に固定し、その他端をアンカー15により斜面２に固定する。前記アンカー15は、その地中先端側を斜め下向きにして斜面２の地山に固定され、前記アンカー15に基端を固定された前記控えロープ材４は、空中において略水平に配置されている。   The holding rope member 4 is made of a wire rope or the like, and one end thereof is fixed to the upper portion 11 of the column and the other end is fixed to the slope 2 by an anchor 15. The anchor 15 is fixed to the natural ground of the slope 2 with its underground tip side obliquely downward, and the holding rope material 4 whose base end is fixed to the anchor 15 is disposed substantially horizontally in the air. .

前記控えロープ材４の支柱上部11への連結箇所Ｒは、以下のように設定されている。設計積雪深さＨｓによる設計荷重が加わった際、雪崩予防柵１に発生するモーメントＭの反曲点Ｍ0が接合箇所であるフランジ13，13の近傍に位置するように、前記連結箇所Ｒを設定している。 The connection location R to the upper portion 11 of the support rope 4 is set as follows. When the design load is applied according to the design snow depth Hs, the connecting point R is set so that the inflection point M 0 of the moment M generated in the avalanche prevention fence 1 is located in the vicinity of the flanges 13 and 13 that are the joining points. It is set.

そして、図２に示すように、設計積雪深さＨｓの条件で設計荷重が加わった際、支柱上部11には、山側が引張領域となるモーメントＭ1が発生し、逆に支柱下部12には、谷側が引張領域となるモーメントＭ2が発生し、反曲点Ｍ0でモーメントＭが零になり、支柱上部11では、連結箇所ＲでモーメントＭが最大となる。 As shown in FIG. 2, when a design load is applied under the condition of the design snow depth Hs, a moment M 1 in which the mountain side becomes a tensile region is generated in the upper column 11, and conversely in the lower column 12. A moment M 2 in which the trough side becomes a tensile region is generated, the moment M becomes zero at the inflection point M 0 , and the moment M becomes the maximum at the connection point R in the upper column 11.

このように連結箇所Ｒを設定すると、接合箇所近傍におけるモーメントＭの発生を零に設定することができる。そして、従来、上部に連結していた控えロープ材４の連結箇所Ｒを、支柱上部11の高さＨの１/２（２分の１）以下、前記高さＨの１/６以上、好ましくは１/４以上とすることにより、接合箇所に加わるモーメントＭを小さくすることができる。すなわち、図２などに示したように、等分布荷重を受ける場合は、支柱上部11の高さＨの１/２（２分の１）以下、高さＨの１/６以上で、支柱下部に加わる曲げモーメントが小さくなるため、支柱上部11より支柱下部12の断面性能が小さくしても、等分布荷重には対応でき、一方、等分布荷重と雪崩の衝撃荷重を受ける場合は、それより高い高さＨが１/４以上が好ましい。 When the connection point R is set in this way, the generation of the moment M in the vicinity of the joint point can be set to zero. Conventionally, the connecting portion R of the holding rope member 4 connected to the upper portion is less than 1/2 (1/2) of the height H of the column upper portion 11, and more than 1/6 of the height H, preferably Can be made 1/4 or more, the moment M applied to the joint can be reduced. That is, as shown in FIG. 2 and the like, when receiving an evenly distributed load, the lower part of the column is less than 1/2 (1/2) of the height H of the column upper part 11 and 1/6 or more of the height H. Therefore, even if the cross-sectional performance of the lower column 12 is smaller than that of the upper column 11, it can handle evenly distributed loads. The high height H is preferably 1/4 or more.

また、連結箇所Ｒを支柱上部11の高さの２分の１以下とすることにより、控えロープ材４の長さを短くすることができ、控えロープ材４に対する積雪荷重の影響を抑えることができ、特に、控えロープ材４を水平に配置したから、支柱上部11とアンカー15の頭部とを最短距離で結ぶことができ、積雪荷重による控えロープ材４の伸びの発生を抑制できる。   Moreover, the length of the stay rope material 4 can be shortened by making the connection point R less than half of the height of the column upper part 11, and the influence of the snow load on the stay rope material 4 can be suppressed. In particular, since the stay rope material 4 is horizontally disposed, the upper portion 11 of the column and the head of the anchor 15 can be connected with the shortest distance, and the occurrence of the extension of the stay rope material 4 due to a snow load can be suppressed.

前記支柱下部12は、斜面２に略垂直に掘削孔21を形成し、この掘削孔21に支柱下部12を挿入し、前記掘削孔21にグラウト材などの充填材（図示せず）を充填して建て込まれる。尚、支柱下部12を建て込んでから、支柱上部11を接合してもよいし、支柱上部11と支柱下部12を接合した後、建て込んでもよい。尚、前記掘削孔21の直径に対して前記フランジ13は径大であり、該フランジ13により支柱構造３の面積拡大部を構成している。   The support lower part 12 is formed with a drilling hole 21 substantially perpendicular to the slope 2, the support lower part 12 is inserted into the drilling hole 21, and a filling material (not shown) such as a grout material is filled in the drilling hole 21. Built. In addition, after the lower column 12 is built, the upper column 11 may be joined, or after the upper column 11 and the lower column 12 are joined, they may be built. The flange 13 is larger in diameter than the diameter of the excavation hole 21, and the flange 13 constitutes an area expansion portion of the support structure 3.

この例では、前記支柱上部11及び支柱下部12は、同径の鋼管からなり、支柱上部11より支柱下部12の肉厚を薄くすることができる。すなわち、支柱上部11の高さＨの１/２（２分の１）以下、高さＨの１/６以上に控えロープ材４を連結することにより、支柱下部に加わる曲げモーメントが小さくなるため、荷重を受けた際、支柱上部11より支柱下部12に加わる力が小さいから、支柱上部11より断面性能の小さい支柱下部12を用いることができる。このように肉厚を薄く設定する以外でも、直径を小さくしたり、支柱下部12を鋼管以外のＨ形鋼などで構成したりしてもよい。一方、支柱上部11の強度を向上するには、プレストレスを導入したり、コンクリートを充填した充填鋼管を用いたりすることができる。図３には、支柱上部11の鋼管111内に、コンクリート112を充填すると共に、支柱上部11の引張領域側、すなわち山側にＰＣ鋼材113を挿入し、このＰＣ鋼材113によりプレストレスを導入したものを示している。 In this example, the support upper part 11 and the support lower part 12 are made of steel pipes having the same diameter, and the thickness of the support lower part 12 can be made thinner than the support upper part 11. That is, the bending moment applied to the lower part of the column is reduced by connecting the cord rope 4 to 1/2 (1/2) of the height H of the column upper part 11 or less than 1/6 of the height H. When a load is applied, since the force applied to the column lower part 12 is smaller than that of the column upper part 11, the column lower part 12 having a smaller cross-sectional performance than the column upper part 11 can be used. In addition to setting the wall thickness as thin as described above, the diameter may be reduced, or the lower column 12 may be formed of an H-shaped steel other than a steel pipe. On the other hand, in order to improve the strength of the upper column 11, prestress can be introduced, or a filled steel pipe filled with concrete can be used. In FIG. 3, the steel pipe 111 of the upper column 11 is filled with concrete 112, and a PC steel material 113 is inserted on the tensile region side, that is, the mountain side of the upper column 11, and prestress is introduced by the PC steel material 113. Is shown.

また、前記支柱上部11はフランジ13を含めて溶融亜鉛メッキなどのメッキ処理を施すことが好ましい。一方、地中に埋設する支柱下部12にはメッキを施す必要がないが、必要に応じてメッキ処理してもよい。   Further, it is preferable that the support upper part 11 includes a plating process such as hot dip galvanizing including the flange 13. On the other hand, it is not necessary to apply plating to the lower column 12 that is buried in the ground, but it may be plated if necessary.

このように本実施例では、請求項１に対応して、設置場所たる斜面２に立設する支柱構造３と、この支柱構造３の地上部と該支柱構造３の山側と連結する控えロープ材４とを備えた防護体たる雪崩予防柵１において、支柱構造３は、控えロープ材４を連結し地上部となる支柱上部11と、斜面２に形成した掘削孔21に建て込んで地中に固定する支柱下部12と、斜面２の表面近傍でそれら支柱上部11と支柱下部12とを接合する接合手段たるフランジ13とを備え、フランジ13が、設計積雪深さの積雪により等分布荷重を受けた支柱構造３の曲げモーメントの反曲点に位置するように、支柱上部11の高さの１/２以下、１/４以上の高さ位置に控えロープ材４を連結したから、積雪荷重が加わっても、接合手段におけるモーメントを小さく抑えることができ、また、従来に比べて、積雪荷重による控えロープ材４における伸びの発生を抑制できる。   As described above, in this embodiment, in accordance with claim 1, the support structure 3 standing on the slope 2 as the installation location, and the cable rope material connected to the ground portion of the support structure 3 and the mountain side of the support structure 3. In the avalanche prevention fence 1 as a protection body provided with 4, the strut structure 3 is built in the excavation hole 21 formed on the slope 2 and the strut upper portion 11 that connects the stay rope material 4 and becomes the ground portion. There are provided a lower strut 12 to be fixed and a flange 13 as a joining means for joining the upper strut 11 and the lower strut 12 in the vicinity of the surface of the slope 2, and the flange 13 receives a uniform load by the snow cover of the designed snow depth. Since the constraining rope material 4 is connected to a height position of 1/2 or less and 1/4 or more of the height of the column upper part 11 so that it is located at the inflection point of the bending moment of the column structure 3, the snow load is Even if added, the moment in the joining means can be kept small, And, as compared with the conventional, I am possible to suppress the occurrence of elongation at refrain rope materials 4 by snow load.

そして、支柱構造３を支柱上部11と支柱下部12とに分割したから、現場への搬入作業が容易となり、また、条件により支柱上部11と支柱下部12の径や構造，強度設定などを変えることもでき、さらに、支柱下部12を建て込むことにより、基礎が不要あるいは簡易なものとなる。   In addition, since the column structure 3 is divided into the column upper part 11 and the column lower part 12, it is easy to carry in to the site, and the diameter, structure, strength setting, etc. of the column upper part 11 and the column lower part 12 can be changed depending on conditions. In addition, the foundation is unnecessary or simple by installing the lower column 12 of the column.

また、このように本実施例では、請求項１に対応して、接合手段たるフランジ13の位置におけるモーメントが小さくなり、支柱上部11と支柱下部12の接合箇所に無理な力が加わることがない。   In this way, in this embodiment, corresponding to claim 1, the moment at the position of the flange 13 serving as the joining means is reduced, and an excessive force is not applied to the joining portion of the support column upper portion 11 and the support column lower portion 12. .

また、このように本実施例では、請求項１に対応して、前記接合手段が、面積拡大部たるフランジ13を有するから、支柱下部12を地中に固定する際、支柱下部12の長さより深い掘削孔21に、支柱下部12を挿入しても、フランジ13がストッパーとなって接合箇所が地表面に位置決めされるため、現場での作業が容易となる。   In this way, in this embodiment, corresponding to claim 1, since the joining means has the flange 13 which is an area expanding portion, when fixing the column lower part 12 to the ground, the length of the column lower part 12 is determined. Even when the support column lower part 12 is inserted into the deep excavation hole 21, the joint 13 is positioned on the ground surface using the flange 13 as a stopper, so that the work at the site becomes easy.

また、このように本実施例では、請求項１に対応して、支柱上部11より支柱下部12の断面性能が小さいから、支柱下部12の部材を簡易なものにできるので、コストダウンなどを図ることができる。   Further, in this embodiment, in accordance with the first aspect, since the cross-sectional performance of the column lower part 12 is smaller than that of the column upper part 11, the member of the column lower part 12 can be simplified, so that the cost can be reduced. be able to.

また、このように本実施例では、請求項２に対応して、支柱上部11に比べて強度を要さない支柱下部12には、プレストレスを導入せずに、強度が必要な支柱上部11のみにプレストレスを導入して強度を向上することができる。   In this way, in this embodiment, corresponding to claim 2, the strut upper portion 11 which requires strength without introducing prestress into the strut lower portion 12 which does not require strength compared to the strut upper portion 11. Only pre-stress can be introduced to improve the strength.

また、このように本実施例では、請求項３に対応して、支柱下部12の外径が円形であるから、角型などに比べて、建て込みの際の掘削孔の直径を小さくすることができる。   As described above, in this embodiment, the outer diameter of the column lower portion 12 is circular, so that the diameter of the excavation hole at the time of erection is made smaller than that of the square type. Can do.

また、このように本実施例では、請求項４に対応して、支柱上部11が中空部材である円形の鋼管からなり、この鋼管の内部にコンクリートを充填したから、支柱上部11の強度を向上することができる。   In this way, in this embodiment, corresponding to claim 4, the support upper part 11 is made of a circular steel pipe which is a hollow member, and the inside of the steel pipe is filled with concrete, so that the strength of the support upper part 11 is improved. can do.

図４及び図５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、支柱下部12Ａには、支柱上部11より断面性能の小さいＨ形鋼を用い、その支柱下部12Ａの上端に前記フランジ13を設けている。   4 and 5 show a second embodiment of the present invention. The same reference numerals are given to the same portions as those in the first embodiment, and detailed description thereof will be omitted. The flange 13 is provided at the upper end of the lower part 12A of the pillar using an H-shaped steel having a smaller cross-sectional performance than the upper part 11 of the pillar.

このように本実施例では、上記実施例１と同様な作用・効果を奏し、また、このように本実施例では、請求項３に対応して、支柱上部11より支柱下部12Ａの断面性能が小さいから、支柱下部12の部材を簡易なものにできるので、コストダウンなどを図ることができる。   As described above, in this embodiment, the same operations and effects as those of the first embodiment are obtained. In this embodiment, the cross-sectional performance of the lower column 12A is higher than the upper column 11 corresponding to the third aspect. Since it is small, the member of the column lower part 12 can be simplified, so that the cost can be reduced.

図６及び図７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、この例では、支柱上部11の鋼管より支柱下部12Ｂの鋼管が小径で、支柱上部11より断面性能が低い支柱下部12Ｂを用いている。   6 and 7 show a third embodiment of the present invention. The same reference numerals are given to the same portions as those of the above-described embodiments, and the detailed description thereof will be omitted. The steel pipe of the lower column 12B is smaller in diameter and the lower column 12B having a lower cross-sectional performance than the upper column 11 is used.

このように本実施例では、上記実施例１と同様な作用・効果を奏し、また、このように本実施例では、請求項３に対応して、支柱上部11と支柱下部12Ｂは管材である鋼管からなり、支柱下部12は支柱上部11より直径が小さいから、支柱上部11に比べて強度を要さない支柱下部12の部材を小さくでき、かつ、建て込みの際の掘削孔21の直径が小さく済むため、施工コストを抑制することができる。   As described above, in this embodiment, the same operations and effects as those of the first embodiment are obtained. In this embodiment, the column upper portion 11 and the column lower portion 12B are pipe members corresponding to the third aspect. It consists of a steel pipe, and the diameter of the lower part 12 of the pillar is smaller than that of the upper part 11 of the pillar, so that the member of the lower part of the pillar 12 which does not require strength compared to the upper part 11 of the pillar can be made small. Since it is small, construction cost can be suppressed.

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。   In addition, this invention is not limited to the said Example, A various deformation | transformation implementation is possible.

本発明の実施例１を示す断面図である。It is sectional drawing which shows Example 1 of this invention. 同上、積雪荷重により発生するモーメントを説明する説明図である。It is explanatory drawing explaining the moment which generate | occur | produces with a snow load. 同上、支柱上部の断面図である。It is sectional drawing of a support | pillar upper part same as the above. 本発明の実施例２を示す断面図である。It is sectional drawing which shows Example 2 of this invention. 同上、支柱下部の断面図である。It is sectional drawing of a support | pillar lower part same as the above. 本発明の実施例３を示す断面図である。It is sectional drawing which shows Example 3 of this invention. 同上、支柱下部の断面図である。It is sectional drawing of a support | pillar lower part same as the above.

１ 雪崩予防柵（防護体）
２ 斜面（設置場所）
３ 支柱構造
４ 控えロープ材
５ 横ロープ材（防護面）
６ 網体（防護面）
11 支柱上部
12，12Ａ，12Ｂ 支柱下部
13 フランジ（接合手段・面積拡大部）
21 掘削孔
Ｒ 連結箇所
Ｍ モーメント
Ｈｓ 設計積雪深
Ｈ 高さ（支柱上部） 1 avalanche prevention fence (protector)
2 Slope (installation location)
3 Prop structure 4 Reservoir rope material 5 Horizontal rope material (protective surface)
6 mesh (protective surface)
11 Upper column
12, 12A, 12B Lower column
13 Flange (joining means / area expansion)
21 Drilling hole R Connection point M Moment Hs Design snow depth H Height (upper column)

Claims (5)

設置場所に立設する支柱構造と、この支柱構造の地上部と該支柱構造の山側と連結する控えロープ材とを備えた防護体において、前記支柱構造は、前記控えロープ材を連結し前記地上部となる支柱上部と、前記設置場所に形成した掘削孔に建て込んで地中に固定する支柱下部と、前記設置場所の表面近傍でそれら支柱上部と支柱下部とを接合する接合手段とを備え、前記接合手段が面積拡大部を有し、前記支柱上部より前記支柱下部の断面性能が小さく、前記接合手段が、設計積雪深さの積雪により等分布荷重を受けた前記支柱構造の曲げモーメントの反曲点に位置するように、前記支柱上部の高さの１/２以下、１/４以上の高さ位置に前記控えロープ材を連結したことを特徴とする防護体。 In a protective body comprising a support structure standing at an installation location, and a ground rope portion of the support structure and a mountain rope material connected to the mountain side of the structure, the support structure connects the cable rope material to the ground surface. An upper part of the support column, a lower part of the support column which is built in the excavation hole formed at the installation site and fixed in the ground, and a joining means for joining the upper part of the support column and the lower support column near the surface of the installation site. The joining means has an area-enlarged portion, and the cross-sectional performance of the lower part of the pillar is smaller than the upper part of the pillar, and the joining means is subjected to a bending moment of the strut structure that receives an evenly distributed load due to snow accumulation of the designed snow depth. A protective body characterized in that the tie rope material is connected to a height position of 1/2 or less and 1/4 or more of the height of the upper portion of the support so as to be located at the inflection point. 前記支柱上部にプレストレストを導入したことを特徴とする請求項１記載の防護体。 The protective body according to claim 1, wherein a prestressed portion is introduced into the upper portion of the column. 前記支柱上部と前記支柱下部は管材からなり、前記支柱下部は前記支柱上部より直径が小さいことを特徴とする請求項１又は２記載の防護体。 The protective body according to claim 1 or 2, wherein the upper part of the support and the lower part of the support are made of a pipe material, and the lower part of the support is smaller in diameter than the upper part of the support. 前記支柱下部の外径が円形であることを特徴とする請求項１〜３のいずれか１項に記載の防護体。 The protective body according to any one of claims 1 to 3, wherein an outer diameter of the lower portion of the column is circular. 前記支柱上部が中空部材からなり、この中空部材の内部にコンクリートを充填したことを特徴とする請求項１〜４のいずれか１項に記載の防護体。 The protective body according to any one of claims 1 to 4, wherein an upper portion of the support column is made of a hollow member, and concrete is filled in the hollow member.
JP2007285574A 2007-11-01 2007-11-01 Protective body Active JP4714204B2 (en)

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