JP2010138551A - Rock fall prevention fence - Google Patents

Rock fall prevention fence Download PDF

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JP2010138551A
JP2010138551A JP2008313517A JP2008313517A JP2010138551A JP 2010138551 A JP2010138551 A JP 2010138551A JP 2008313517 A JP2008313517 A JP 2008313517A JP 2008313517 A JP2008313517 A JP 2008313517A JP 2010138551 A JP2010138551 A JP 2010138551A
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rope
movable intermediate
terminal
column
support plate
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JP5005665B2 (en
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Yasunori Yoshida
泰則 吉田
Norio Kaneko
則夫 金子
Takahiro Okayama
隆宏 岡山
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Tokyo Seiko Rope Manufacturing Co Ltd
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Tokyo Seiko Rope Manufacturing Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact rock fall prevention fence which has high rock fall energy absorption efficiency, and is excellent in strength, functionality, construction performance and repairing performance. <P>SOLUTION: Two terminal supports 2 are installed at a predetermined space; a supporting plate 3 is installed in an approximately central position between the terminal supports; a movable intermediate support 4 is placed on the supporting plate in such a manner as to be slidable to a road side; and the right and left terminal supports and the movable intermediate support are connected to each other by means of a plurality of horizontal ropes 5 in such a manner that the movable intermediate support is positioned in the center. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は道路沿い等に設置されて落石の衝撃力をロープの伸びで吸収する形式の落石防護柵に関する。 The present invention relates to a rockfall protection fence of a type installed along a road or the like to absorb the impact force of rockfall by the elongation of a rope.

山間地の傾斜に発生する落石から道路や家屋を守るための手段として、支柱間に複数本の水平状の横ロープを上下に間隔をもって張設し、その張設した横ロープの表面に金網を取り付けて落石を受け止めるようにした落石防護柵が用いられている。
さらに、こうした落石防護柵において、支柱と横ロープの係留部を、緩衝金具を介して結合した構造とし、山側から落下した落石がロープを直撃した際の張力によるロープと緩衝金具の滑り摩擦抵抗や金具の塑性変形により衝撃エネルギーを減衰吸収させるようにしたものが提案されている。
As a means to protect roads and houses from falling rocks that occur in the slopes of mountainous areas, several horizontal horizontal ropes are stretched between the columns at intervals, and a wire mesh is attached to the surface of the stretched horizontal rope. A rockfall guard fence is attached to catch rockfalls.
Furthermore, in such a rockfall protection fence, the mooring part of the support and the side rope is connected via a shock absorber, and the sliding friction resistance between the rope and the shock absorber due to the tension when the rock falling from the mountain hits the rope directly There has been proposed one in which impact energy is attenuated and absorbed by plastic deformation of a metal fitting.

しかし、このような緩衝金具による衝突エネルギー吸収の方法は、緩衝金具を塑性変形させるので、ロープ端末及び緩衝金具にはロープの破断荷重以上の強度が要求される。ロープの伸び(破断伸びは5%以下)ではエネルギー吸収はそれほど期待できず、緩衝金具及びロープ端末が衝撃エネルギーを直接受けることになるので、ロープ端末や支柱の大型化は避けられない。 However, the collision energy absorption method using the buffer metal fitting plastically deforms the buffer metal fitting, so that the rope terminal and the buffer metal fitting are required to have a strength higher than the breaking load of the rope. When the rope is stretched (the elongation at break is 5% or less), energy absorption cannot be expected so much, and the shock absorber and the rope terminal are directly subjected to impact energy.

また、ロープの伸びにより衝撃エネルギーの吸収量を上げるためには、支柱間の距離を、例えば30m〜60mといった長スパン化することが必要となる。しかし、長スパンにすると落石発生可能性面積が広がり、落石量も増大するので、ロープ強度も上げる必要があり、ロープ強度増加に合わせたロープ端末金具や支柱の大型化が避けられなくなる。さらに、防護柵全体で衝撃エネルギーを吸収する構造では、部分補修の難度は高くなり、補修費用も嵩むことになる。
特開2002−180422号公報
Further, in order to increase the amount of absorption of impact energy by the elongation of the rope, it is necessary to increase the distance between the columns, for example, 30 m to 60 m. However, if the span is long, the falling rock occurrence area increases and the amount of falling rocks increases, so it is necessary to increase the rope strength, and it is inevitable to increase the size of the rope end fittings and supports in accordance with the increase in the rope strength. Furthermore, the structure that absorbs impact energy in the entire protective fence increases the difficulty of partial repair, and increases the repair cost.
JP 2002-180422 A

本発明は前記のような問題点を解消するために創案されたもので、その目的とするところは、コンパクトで落石エネルギー吸収効率が高く、強度面、機能面及び施工面、補修面ですぐれた落石防護柵を提供することにある。 The present invention was devised in order to solve the above-mentioned problems, and the object of the present invention is compact and high in efficiency of absorbing rockfall energy, and excellent in terms of strength, function, construction, and repair. The purpose is to provide a rockfall protection fence.

上記目的を達成するため本発明は、所定の間隔で2本の端末支柱を設け、端末支柱間の略中央位置に支持プレートを設置し、該支持プレート上に道路側へ摺動可能に可動中間支柱を載置し、該可動中間支柱を中心として左右の端末支柱と可動中間支柱を水平状の複数段のロープで連結したことを特徴としている。(請求項1) In order to achieve the above object, the present invention provides two terminal struts at a predetermined interval, and a support plate is installed at a substantially central position between the terminal struts. A support column is placed, and the left and right terminal support columns and the movable intermediate support column are connected by a plurality of horizontal ropes around the movable intermediate support column. (Claim 1)

本発明によれば、所定の間隔の端末支柱間の略中央に設置した支持プレート上に可動中間支柱を道路側方向に摺動可能に載置し、その可動中間支柱を中心に左右の端末支柱と可動中間支柱を水平状の多段ロープで連結しているので、ロープは一方の端末支柱−可動中間支柱(1/2スパン)、可動中間支柱−他方の端末支柱(1/2スパン)で縁切りされ、小さなあるいは小規模の落石の場合は、端末支柱−可動中間支柱のロープの伸びで衝撃エネルギーを吸収し、他の端末支柱や可動中間支柱に影響を与えない。従って補修作業が容易であり、コストも安価で済む。 According to the present invention, the movable intermediate strut is slidably mounted in the road side direction on the support plate installed in the approximate center between the terminal struts at a predetermined interval, and the left and right terminal struts centering on the movable intermediate strut And the movable intermediate strut are connected by a horizontal multistage rope, so the rope is edge-cut at one end strut-movable intermediate strut (1/2 span), and the movable intermediate strut-other end strut (1/2 span) In the case of small or small falling rocks, the impact energy is absorbed by the extension of the rope between the terminal column and the movable intermediate column, and the other terminal columns and the movable intermediate column are not affected. Therefore, the repair work is easy and the cost is low.

そして、大きなあるいは大規模な落石の場合は、ロープに加わる衝撃荷重により可動中間支柱が支持プレート上で道路側にスライドし、可動中間支柱の左右の合計(1スパン)したロープ長の伸び(塑性変形)で衝撃エネルギーを効率よく吸収する。
また、2本の端末支柱と1本の可動中間支柱を1ロット(1スパン)とした防護柵であるため防護柵のコンパクト化を達成することができ、部材および施工の標準化を容易にし、品質の信頼性を向上させることができる。また、防護柵の補修もロット単位とすることで、コスト、補修時間の圧縮が可能になる。
In the case of a large or large-scale rock fall, the movable intermediate strut slides on the road side on the support plate due to the impact load applied to the rope, and the total length of the movable intermediate strut on the left and right (one span) is extended (plastic) (Deformation) absorbs impact energy efficiently.
In addition, since it is a guard fence with two terminal struts and one movable intermediate strut in one lot (one span), it is possible to achieve a compact guard fence, facilitating standardization of parts and construction, quality Reliability can be improved. In addition, by repairing the protective fence in units of lots, cost and repair time can be reduced.

好適には、支持プレートが、ロープに加わる張力による可動中間支柱の道路側への移動を許容するが、山側への移動は許さないように働く位置決め手段を備えている。
これによれば、可動中間支柱を常態において的確な位置に保持することができるとともに、落石発生時には可動中間支柱の道路側へのずれを促して衝撃エネルギーを級数させることができる。
好適には、伸びPが20%≦P≦65%であるロープで端末支柱と可動中間支柱が連結されている。
これによれば、ロープの塑性変形によるエネルギー吸収が大きく、衝撃エネルギーの多くをロープが効率よく吸収し、ロープ端末金具、端末支柱、可動中間支柱に加わるエネルギーが減衰されるので、これらの金具、部材の小型化が可能である。
Preferably, the support plate is provided with positioning means that allows movement of the movable intermediate strut to the road side due to tension applied to the rope, but does not allow movement to the mountain side.
According to this, the movable intermediate strut can be held at an accurate position in a normal state, and when the falling rock occurs, the displacement of the movable intermediate strut to the road side can be promoted to classify the impact energy.
Preferably, the terminal column and the movable intermediate column are connected by a rope having an elongation P of 20% ≦ P ≦ 65%.
According to this, the energy absorption by the plastic deformation of the rope is large, the rope efficiently absorbs most of the impact energy, and the energy applied to the rope end fitting, terminal strut, movable intermediate strut is attenuated, so these fittings, The member can be downsized.

好適には、上下複数段のロープを間隔保持材で結合し、上下複数団のロープを一体化している。
これによれば、落石が1本のロープを直撃した場合でも間隔保持材により上下のロープ全体に落石エネルギーが伝達されるので、落石エネルギーの吸収効率が高められる。
Preferably, a plurality of upper and lower stages of ropes are coupled with a spacing member, and the upper and lower groups of ropes are integrated.
According to this, even when the falling rock hits one rope directly, the falling rock energy is transmitted to the entire upper and lower ropes by the spacing member, so that the absorption efficiency of falling rock energy is enhanced.

以下添付図面を参照して本発明の実施例を説明する。
図1は本発明による落石防護柵の実施例を示しており、aは山側、bは道路側である。符号1は、道路と山側傾斜面との境界に沿って設置された本発明の高エネルギー吸収式の落石防護柵である。
前記落石防護柵1は、左右に間隔をおいて立設された端末支柱2,2と、それら端末支柱2,2間のほぼ中間位置に配され、道路側方向に移動可能な可動中間支柱4と、可動中間支柱4に一端が連結され、他端が左右の端末支柱2,2にそれぞれ連結されるように水平状に張設された左右の複数段のロープ5,5とを1スパンLとして構成されている。
Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows an embodiment of a rock fall protection fence according to the present invention, where a is a mountain side and b is a road side. Reference numeral 1 denotes a high energy absorption type rock fall protection fence of the present invention installed along the boundary between the road and the mountain side inclined surface.
The rock fall protection fence 1 has terminal struts 2 and 2 erected at intervals on the left and right sides, and a movable intermediate strut 4 which is arranged at a substantially intermediate position between the terminal struts 2 and 2 and is movable in the road side direction. And a plurality of left and right ropes 5 and 5 extending horizontally so that one end is connected to the movable intermediate strut 4 and the other end is connected to the left and right terminal struts 2 and 2, respectively. It is configured as.

端末支柱2,2は、たとえば450mm×450mm、長さ4500mmの鋼製四角柱からなり、防食および景観の効果を高めるために亜鉛めっきが施され、さらにその上に樹脂塗装されている。四角柱は角鋼管でもよいし、溝形鋼を対向状に溶接したものでもよい。
前記端末支柱2,2は道路に沿って間隔をおいて配され、所要長さたとえば1500mmの下部20がモルタルやコンクリートなどのセメント系基礎60、60に埋め込まれることで立設されている。しかし、これに限らず、下部にステーつきのプレート金具を設け、これをセメント系基礎にアンカーされたプレート金物(図示せず)に剛結することで立設していてもよい。
The terminal columns 2 and 2 are made of, for example, a steel square column having a size of 450 mm × 450 mm and a length of 4500 mm. The terminal columns 2 and 2 are galvanized in order to enhance the effect of corrosion prevention and scenery, and are further coated with resin. The square column may be a square steel pipe or may be obtained by welding channel steels in an opposing manner.
The terminal columns 2 and 2 are arranged at intervals along the road, and are erected by embedding a lower portion 20 having a required length, for example, 1500 mm, in cement-based foundations 60 and 60 such as mortar and concrete. However, the present invention is not limited to this, and a plate metal fitting with a stay may be provided at the lower portion, and the metal plate may be erected by being rigidly connected to a metal plate (not shown) anchored to a cement-based foundation.

可動中間支柱4は、たとえば200mm×200mm×8mm×12mm、高さが3000mmのH形鋼からなっており、防食効果を高めるために亜鉛めっきされている。さらに、景観を高めるため樹脂塗装が施されていてもよい。
前記可動中間支柱4が位置すべき左右の端末支柱2、2の略中間位置の地面には、モルタルやコンクリートで造られた基礎61が設けられ、この基礎61上に鋼板、樹脂あるいはコンクリートで造られた支持プレート3が設けられている。支持プレート3はたとえば450mm×450mm、厚さ7mmのごときからなる。
The movable intermediate strut 4 is made of, for example, an H-shaped steel having a size of 200 mm × 200 mm × 8 mm × 12 mm and a height of 3000 mm, and is galvanized to enhance the anticorrosion effect. Furthermore, resin coating may be applied to enhance the landscape.
A foundation 61 made of mortar or concrete is provided on the ground at a substantially intermediate position between the left and right terminal supports 2 and 2 on which the movable intermediate support 4 is to be placed, and the foundation 61 is made of steel plate, resin or concrete. A support plate 3 is provided. The support plate 3 is formed of, for example, 450 mm × 450 mm and a thickness of 7 mm.

この実施例では、図2のように、基礎61に4本のアンカーボルト33が頭部の雄ねじ部を上方に突出させるように埋め込まれている。支持プレート3は4隅に前記アンカーボルト33に対応する通孔32を穿設しており、前記基礎61の上面に載置され、通孔32を貫通した各アンカーボルト33の頭部にナット34を螺合して締結することで固定されている。支持プレート3がコンクリートの場合、基礎61上にモルタルで接合して定着することもできるし、型枠などを用いて現場打ちで構築してもよい。 In this embodiment, as shown in FIG. 2, four anchor bolts 33 are embedded in the foundation 61 so that the male screw portion of the head protrudes upward. The support plate 3 has through holes 32 corresponding to the anchor bolts 33 at four corners. The support plate 3 is placed on the upper surface of the foundation 61 and has nuts 34 on the heads of the anchor bolts 33 passing through the through holes 32. Are fixed by screwing together. When the support plate 3 is concrete, the support plate 3 can be fixed by being joined to the foundation 61 with mortar, or it can be built on-site using a formwork or the like.

可動中間支柱4は、フランジ部45,45が山側及び道路側に面するように前記支持プレート3上に載置される。そして支持プレート3の表面には、ロープ5に加わる張力による可動中間支柱4の道路側への移動を許容するが、山側への移動は許さないように働く位置決め手段31を設けている。 The movable intermediate column 4 is placed on the support plate 3 so that the flange portions 45, 45 face the mountain side and the road side. Positioning means 31 is provided on the surface of the support plate 3 to allow movement of the movable intermediate strut 4 to the road side due to tension applied to the rope 5 but not to allow movement to the mountain side.

この実施例では、前記位置決め手段31として、図2のように、可動中間支柱4のフランジ45,45と対向するように山側と道路側に突部31A、31Bが支持プレート状に突出しており、山側の突部31Aは障壁として機能すべく可動中間支柱4のフランジと対向する側が垂直状面となっている。この例では断面矩形状をなしている。これに対して道路側の突部31Bは摺動許容部であり、可動中間支柱4のフランジ45と対向する側が傾斜状でその頂上から先が垂直ないしそれに近い角度となる断面三角形状となっていて、一定以上の荷重がかかったときに可動中間支柱4の下端が乗り越えて移動し得るようになっている。 In this embodiment, as the positioning means 31, as shown in FIG. 2, protrusions 31A, 31B protrude in a support plate shape on the mountain side and the road side so as to face the flanges 45, 45 of the movable intermediate column 4. The protrusion 31A on the mountain side has a vertical surface on the side facing the flange of the movable intermediate strut 4 so as to function as a barrier. In this example, the cross section is rectangular. On the other hand, the projecting portion 31B on the road side is a sliding allowance portion, and the side facing the flange 45 of the movable intermediate column 4 is inclined, and has a triangular cross section with the tip perpendicular to or close to the top from the top. Thus, the lower end of the movable intermediate strut 4 can get over and move when a certain load or more is applied.

前記突部31A、31Bは、この例ではフランジと同等以上の長さの突条ないし土手形態となっているが、図3(a)に示すように複数個の山すなわち突起に分割されていてもよい。それら突部や突起31A、31Bは、部材を接合あるいは溶接し、もしくは支持プレートを打出し加工することで形成される。
また、場合によっては、図3(b)のように、支持プレート3を下板301と上板300の2枚の重ね板で構成し、上板300に位置決め手段31として可動中間支柱4の下端を嵌めうる寸法形状の矩形状の窓穴を形成するとともに、この窓穴における山側の辺を障壁用の垂直面311Aとし、道路側の辺を摺動許容部として垂直でなく上面に向かって浅くなる傾斜状面311B とし、一定以上の荷重がかかったときに可動中間支柱4の下端が乗り越えて移動し得るようにしている。
In this example, the protrusions 31A and 31B are in the form of ridges or banks with a length equal to or greater than the flange, but are divided into a plurality of peaks or protrusions as shown in FIG. Also good. These protrusions and protrusions 31A and 31B are formed by joining or welding members or punching a support plate.
In some cases, as shown in FIG. 3 (b), the support plate 3 is composed of two overlapping plates of a lower plate 301 and an upper plate 300, and the lower end of the movable intermediate column 4 serves as a positioning means 31 on the upper plate 300. A rectangular window hole having a size and shape that can be fitted into the window hole is formed, and the side on the mountain side of the window hole is a vertical surface 311A for a barrier, and the side on the road side is a sliding allowance portion and is shallow toward the upper surface, not vertical. The lower end of the movable intermediate strut 4 can get over and move when a certain load or more is applied.

可動中間支柱4は前述のようにプレート3の上にフランジ部45,45が山側及び道路側に面するよう配置されるが、そうした可動中間支柱4にはこれを中心として端末支柱2、2との間を水平状の多段のロープ5、5で連結している。
ロープ5は、構成するワイヤの降伏比が0.5〜0.7(降伏点/引っ張り破断荷重)の範囲にコントロールされており、かつ、伸びPが20%≦P≦65%の吸収エネルギーの大きなロープが用いられる。
伸びの下限を20%としたのはこれ未満だとエネルギー吸収が少なく十分な効果が得られないからであり、上限を65%としたのは、これを超える伸びでは必要以上に道路側に落石がはみ出すからである。好適には大型車の交通の障害にならないように、上限を55%に抑えることが望ましい。
ロープ5の具体例をあげると、構造が3×7、直径18mm、材質は軟質ステンレスであり、破断荷重は84kN、伸びは52%、吸収エネルギーは35kN・mである。ロープ5は景観の効果を高めるため樹脂塗装されていることが好ましい。
As described above, the movable intermediate column 4 is arranged on the plate 3 so that the flanges 45, 45 face the mountain side and the road side. The movable intermediate column 4 has the terminal columns 2, 2, Are connected by horizontal multi-stage ropes 5 and 5.
The rope 5 is controlled so that the yield ratio of the constituent wire is in the range of 0.5 to 0.7 (yield point / tensile breaking load) and the elongation P is 20% ≦ P ≦ 65%. A big rope is used.
The reason why the lower limit of elongation is set to 20% is that if it is less than this, energy absorption is small and a sufficient effect cannot be obtained, and the upper limit is set to 65% because if the elongation exceeds this, rock falls on the road more than necessary. Because it protrudes. It is desirable to keep the upper limit at 55% so as not to obstruct traffic of large vehicles.
As a specific example of the rope 5, the structure is 3 × 7, the diameter is 18 mm, the material is soft stainless steel, the breaking load is 84 kN, the elongation is 52%, and the absorbed energy is 35 kN · m. The rope 5 is preferably resin-coated in order to enhance the landscape effect.

次に端末支柱2と端末支柱4へのロープ5の張設構造を説明すると、まず各端末支柱2には、ロープ5を張設するため、可動中間支柱4に対面する側とこれと反対側に、上下方向で間隔をおいてたとえば10箇所に孔21、21を設けている。それら孔21,21は一直線上にある。
上記端末支柱2に連結するためのロープ5の端部はアイボルト端末56となっている。すなわち、図4(a)に示すようにアルミニュームやステンレスなどの金属管512に挿通したロープ5をアイボルト511のリングに潜らせたのち引き返して前記金属管512に反対側から挿通し、この状態で金属管を圧締している。
前記アイボルト端末56は端末支柱2の前記孔21、21に貫挿され、孔から突出した雄ねじにナット58が螺合されることで端末支柱2に連結固定される。
Next, the structure for extending the rope 5 to the terminal column 2 and the terminal column 4 will be described. First, in order to stretch the rope 5 to each terminal column 2, the side facing the movable intermediate column 4 and the opposite side thereof. In addition, for example, holes 21 and 21 are provided at 10 positions at intervals in the vertical direction. The holes 21 and 21 are in a straight line.
An end portion of the rope 5 for connecting to the terminal column 2 is an eyebolt terminal 56. That is, as shown in FIG. 4A, the rope 5 inserted through the metal tube 512 such as aluminum or stainless steel is buried in the ring of the eyebolt 511 and then turned back and inserted into the metal tube 512 from the opposite side. The metal tube is clamped with.
The eyebolt terminal 56 is inserted into the holes 21 and 21 of the terminal column 2 and is connected and fixed to the terminal column 2 by screwing a nut 58 into a male screw protruding from the hole.

図5のように、可動中間支柱4の山側と道路側のフランジ45,45には、ウエブ46を境として左右に、ロープ5を連結するためのボルトからなる連結ピン52を貫通させる孔47、47が設けてある。孔47、47は一直線上にあり、左右の組は平行状をなしている。
可動中間支柱4に連結するロープ5の端部は、金属管512に挿通したロープ5を、ループ状を呈するように折り返し、再び前記金属管512に挿通して金属管を圧締したトヨロック端末57となっている。
連結にあたっては、道路側フランジ45と山側フランジ45の間にカラーパイプ53、トヨロック端末57、カラーパイプ53の順に配置し、連結ピン52を道路側の前記孔47からカラーパイプ53、トヨロック端末57、カラーパイプ53、山側側の孔47へと順次貫挿し、連結ピン52の端部の雄ねじに螺合したナット59で締結するものである。
As shown in FIG. 5, a hole 47 through which a connecting pin 52 made of a bolt for connecting the rope 5 is passed through the mountain 45 and the road-side flanges 45, 45 of the movable intermediate column 4 on the left and right sides of the web 46. 47 is provided. The holes 47 and 47 are in a straight line, and the left and right sets are parallel.
The end of the rope 5 connected to the movable intermediate strut 4 is folded back so that the rope 5 inserted through the metal tube 512 has a loop shape, and is inserted again into the metal tube 512 to press the metal tube and toyolock terminal 57 It has become.
In connection, the color pipe 53, the toyo lock terminal 57, and the color pipe 53 are arranged in this order between the road side flange 45 and the mountain side flange 45, and the connection pin 52 is connected from the hole 47 on the road side to the color pipe 53, the toyo lock terminal 57, The collar pipe 53 and the mountain side hole 47 are sequentially inserted and fastened with a nut 59 screwed into the male thread at the end of the connecting pin 52.

そして、可動中間支柱4に取り付けたトヨロック端末57を落石の衝突から保護するために、山側フランジ45にカバー55を配し、前記ナット59で固定している。カバー55は厚さがたとえば5mm程度の長方形の鉄板をフランジよりも大きい円弧を描くように傘状に加工したもので、カバー55の円弧の内側には可動中間支柱4に取り付けるための馬蹄形状に加工されたばね板部550を有しており、ばね板部の端には連結ピン52を貫挿させる通孔を設けている。
端末支柱2と可動中間支柱4に張設されたロープ5のロープ張力は、端末支柱2を貫通したアイボルト511に螺合したナット58により調整される。可動中間支柱4−端末支柱2(1/2スパン)のロープ5取り付けは前記と同様なので説明を省略する。
And in order to protect the toyo lock terminal 57 attached to the movable intermediate column 4 from the collision of falling rocks, a cover 55 is disposed on the mountain side flange 45 and fixed with the nut 59. The cover 55 is a rectangular iron plate having a thickness of, for example, about 5 mm, processed into an umbrella shape so as to draw an arc larger than the flange. The cover 55 has a horseshoe shape attached to the movable intermediate column 4 inside the arc. A processed spring plate portion 550 is provided, and a through hole through which the connecting pin 52 is inserted is provided at an end of the spring plate portion.
The rope tension of the rope 5 stretched between the terminal column 2 and the movable intermediate column 4 is adjusted by a nut 58 screwed into an eyebolt 511 penetrating the terminal column 2. Since the attachment of the movable intermediate strut 4 to the end strut 2 (1/2 span) with the rope 5 is the same as described above, the description thereof is omitted.

多段状のロープ5,5は、図6のように端末支柱2と可動中間支柱4の略中央部で間隔保持材6にU型金具601及びナット602で連結固定されている。間隔保持材6は、たとえば直径90mm、厚さ3.2mmのパイプが使用され、端末支柱2と可動中間支柱4の略中間点で10段のロープ5に対して略垂直に連結固定してある。また、端末支柱2−可動中間支柱4の道路側前面には50mm×50mmの菱形金網7が配され、結合コイル(図示せず)でロープ5に取り付けられている。
間隔保持材6と金網7は防食および景観の効果を高めるため亜鉛めっきされ、さらに樹脂塗装されている。
As shown in FIG. 6, the multi-stage ropes 5 and 5 are connected and fixed to the interval holding member 6 by a U-shaped metal fitting 601 and a nut 602 at a substantially central portion of the terminal support 2 and the movable intermediate support 4. The spacing member 6 is, for example, a pipe having a diameter of 90 mm and a thickness of 3.2 mm, and is connected and fixed substantially vertically to the ten-stage rope 5 at a substantially middle point between the terminal column 2 and the movable intermediate column 4. . Further, a rhombus metal mesh 7 of 50 mm × 50 mm is arranged on the road side front surface of the terminal column 2 -the movable intermediate column 4 and is attached to the rope 5 with a coupling coil (not shown).
The spacing member 6 and the wire mesh 7 are galvanized and resin-coated to enhance the anticorrosion and landscape effect.

本実施例の落石防止柵に落石が衝突したときの様子を模式図として図7に示す。図7(a)に示すように落石Gが左の1/2スパンに衝突すると、図7(b)のように左側ロープ5は道路側に伸び、端末支柱2、可動中間支柱4には道路側に引っ張る張力が働く。この張力は間隔保持材6により左の1/2スパンの上下方向に張設した全部のロープに伝達される。
この張力が一定値(例えば50kN)を超えると、可動中間支柱4の下端部が図7(c)のように支持プレート3上の位置決め手段31の摺動許容部(道路側突部又は突起31Bまたは傾斜状面311B)を滑り超え、可動中間支柱4は道路側に移動する。
FIG. 7 shows a schematic diagram of a state where a falling rock collides with the falling rock prevention fence of the present embodiment. When the falling rock G collides with the left half span as shown in FIG. 7A, the left rope 5 extends to the road side as shown in FIG. The tension pulling to the side works. This tension is transmitted to all ropes stretched in the vertical direction of the left 1/2 span by the spacing member 6.
When this tension exceeds a certain value (for example, 50 kN), the lower end portion of the movable intermediate column 4 is allowed to slide (the road side protrusion or protrusion 31B) of the positioning means 31 on the support plate 3 as shown in FIG. Alternatively, the movable intermediate strut 4 moves to the road side by slipping over the inclined surface 311B).

左右のロープ5,5´は可動中間支柱4で縁切りされていたが、可動中間支柱4が道路側に移動することで右ロープ5´に張力が伝達され、右の1/2スパンのロープ5´も伸び、端末支柱間が1本のロープとして作用し、塑性変形が拡大することで衝突エネルギーの吸収効率が高められる。また、落石はG中央部に誘導され衝突エネルギーを緩和する効果もある。 The left and right ropes 5 and 5 ′ were cut off by the movable intermediate strut 4, but when the movable intermediate strut 4 moves to the road side, the tension is transmitted to the right rope 5 ′ and the right half span rope 5 'Also extends, the terminal struts act as a single rope, and the plastic deformation is expanded, so that the efficiency of collision energy absorption is enhanced. In addition, rock fall is guided to the center of G and has the effect of relaxing the collision energy.

可動中間支柱4のロープの連結部分にはカバー55が覆っており、落石Gが衝突してもロープ端末が破壊しないように防護される。したがって、落石後のロープ破損の補修も略5mのロープを取り替えるだけでよく、カバー55の交換もロープ取替え時に同時に行うこともできる。また、落石によるロープ5の損傷の補修においては、前述の通り落石防護柵1(1スパン)のロープ5は可動中間支柱4により左右1/2スパンの単位で縁切りされているので、可動中間支柱4が移動しない場合は1/2スパンのロープ5補修(取替え等)で済む。 The connecting portion of the rope of the movable intermediate column 4 is covered with a cover 55, so that the rope terminal is protected from being destroyed even if the falling rock G collides. Therefore, the rope breakage after falling rocks can be repaired only by replacing the approximately 5 m rope, and the cover 55 can be replaced simultaneously with the replacement of the rope. Further, in repairing damage to the rope 5 due to falling rocks, the rope 5 of the falling rock protection fence 1 (1 span) is edge-cut by the movable intermediate strut 4 in units of 1/2 left and right as described above. When 4 does not move, repair (replacement etc.) of the rope 5 of 1/2 span is sufficient.

第2の実施例を図8に示す。これは第1実施例に示す略10mの防護柵(1スパン)を設置場所に合わせて複数連続配置したものである。なお、中間の可動中間支柱4や間隔保持材6は図示を省略している。
この実施例も、端末支柱2の左右の面にロープ連結用金具であるアイボルト端末56を取り付けるための孔を設けるが、その孔は2組21,21´の孔であり、山側と道路側に間隔を置いて平行状に開けてある。
第1スパン901では、道路側の孔21´を使用し、第2スパン902は山側の穴21を使用することで1本の端末支柱2を第1スパン901と第2スパン902に共用することができる。第3スパン903以降も同様に設置することができる。
A second embodiment is shown in FIG. In this example, a plurality of protective fences (1 span) of about 10 m shown in the first embodiment are continuously arranged according to the installation location. The intermediate movable intermediate strut 4 and the spacing member 6 are not shown.
In this embodiment as well, holes for attaching eyebolt terminals 56, which are rope connection fittings, are provided on the left and right surfaces of the terminal column 2, but the holes are two sets of 21 and 21 'holes on the mountain side and the road side. It is opened in parallel at intervals.
The first span 901 uses the road-side hole 21 ′, and the second span 902 uses the mountain-side hole 21 to share one terminal column 2 for the first span 901 and the second span 902. Can do. The third span 903 and thereafter can be similarly installed.

(a)は本発明による落石防護柵の第1実施例示す正面図、(b)は平面図である。(A) is a front view which shows 1st Example of the rock fall protection fence by this invention, (b) is a top view. (a)は本発明の支持プレートにおける位置決め手段の一例を可動中間支柱との取り合いで示す正面図、(b)は平面図、(c)は側面図である。(A) is a front view which shows an example of the positioning means in the support plate of this invention by engagement with a movable intermediate | middle support | pillar, (b) is a top view, (c) is a side view. (a)は支持プレートにおける位置決め手段の他の例を示す平面図、(b)は支持プレートにおける位置決め手段の他の例を示す側面図である。(A) is a top view which shows the other example of the positioning means in a support plate, (b) is a side view which shows the other example of the positioning means in a support plate. (a)は本発明のロープ端末と端末支柱との連結関係を示す正面図、(b)は平面図である。(A) is a front view which shows the connection relation of the rope terminal of this invention, and a terminal support | pillar, (b) is a top view. (a)は可動中間支柱とロープの連結部を示す正面図、(b)は横断面図である。(A) is a front view which shows the connection part of a movable intermediate | middle support | pillar and a rope, (b) is a cross-sectional view. (a)は本発明の間隔保持材を示す正面図、(b)は平面図である。(A) is a front view which shows the space | interval maintenance material of this invention, (b) is a top view. 本発明の落石防護柵に衝突した落石の挙動と防護柵の変化を示す模式図である。It is a schematic diagram which shows the behavior of the falling rock colliding with the falling rock protection fence of this invention, and the change of a protection fence. 本発明の落石防護柵を複数連結した第2実施例を示し、(a)は正面図、(b)は平面図である。The 2nd Example which connected two or more rockfall protection fences of this invention is shown, (a) is a front view, (b) is a top view.

符号の説明Explanation of symbols

1 落石防護柵
2 端末支柱
3 支持プレート
4 可動中間支柱
5 ロープ
6 間隔保持材
31 位置決め手段
DESCRIPTION OF SYMBOLS 1 Falling rock guard 2 Terminal support | pillar 3 Support plate 4 Movable intermediate support | pillar 5 Rope 6 Space | interval holding material 31 Positioning means

Claims (4)

所定の間隔で2本の端末支柱を設け、端末支柱間の略中央位置に支持プレートを設置し、該支持プレート上に道路側へ摺動可能な可動中間支柱を載置し、該可動中間支柱を中心として左右の端末支柱と可動中間支柱を水平状の複数段のロープで連結したことを特徴とする落石防護柵。 Two terminal struts are provided at a predetermined interval, a support plate is installed at a substantially central position between the terminal struts, a movable intermediate strut slidable on the road side is placed on the support plate, and the movable intermediate strut A rockfall protection fence characterized by connecting the left and right terminal struts and movable intermediate struts with a multi-level horizontal rope. 支持プレートが、ロープに加わる張力による可動中間支柱の道路側への移動を許容するが、山側への移動は許さないように働く位置決め手段を備えている請求項1に記載の設けている落石防護柵。   The rock fall protection provided according to claim 1, wherein the support plate is provided with positioning means for allowing movement of the movable intermediate strut to the road side by tension applied to the rope but not allowing movement to the mountain side. fence. ロープとして伸びPが20%≦P≦65%のものを用いている請求項1又は2に記載の落石防護柵。 The rock fall protection fence according to claim 1 or 2, wherein the rope has an elongation P of 20% ≦ P ≦ 65%. 上下複数段のロープを間隔保持材で結合している請求項1ないし3のいずれかに記載の落石防護柵。 The rock fall protection fence according to any one of claims 1 to 3, wherein a plurality of upper and lower steps of rope are joined together by a spacing member.
JP2008313517A 2008-12-09 2008-12-09 Rock fall protection fence Expired - Fee Related JP5005665B2 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012225036A (en) * 2011-04-19 2012-11-15 Raiteku:Kk Guard fence
WO2015102032A1 (en) * 2014-01-06 2015-07-09 株式会社プロテックエンジニアリング Support post structure for safety fence
JP2018100484A (en) * 2016-12-19 2018-06-28 吉佳エンジニアリング株式会社 Rockfall protection fence
JP6990474B1 (en) * 2021-07-20 2022-01-12 株式会社プロテックエンジニアリング Guard rail
JP7079542B1 (en) * 2022-02-24 2022-06-02 株式会社プロテックエンジニアリング Standing structure of guard rail columns

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60190804U (en) * 1984-05-30 1985-12-18
JPS61109805A (en) * 1984-10-31 1986-05-28 Tokyo Rope Mfg Co Suspension type falling rock preventing fence
JP2000248515A (en) * 1999-03-02 2000-09-12 Yoshida Kouzou Design:Kk Footing structure of column for protective fence
JP2003239225A (en) * 2002-02-20 2003-08-27 Asahi Steel Industry Stone guard
JP2004019369A (en) * 2002-06-19 2004-01-22 Yutaka Hosokawa Protection fence
JP2007077672A (en) * 2005-09-14 2007-03-29 Yoshida Kouzou Design:Kk Shock absorbing fence
JP2009150097A (en) * 2007-12-20 2009-07-09 Shibata Ind Co Ltd Shock absorber and flow-down object catching device using it

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60190804U (en) * 1984-05-30 1985-12-18
JPS61109805A (en) * 1984-10-31 1986-05-28 Tokyo Rope Mfg Co Suspension type falling rock preventing fence
JP2000248515A (en) * 1999-03-02 2000-09-12 Yoshida Kouzou Design:Kk Footing structure of column for protective fence
JP2003239225A (en) * 2002-02-20 2003-08-27 Asahi Steel Industry Stone guard
JP2004019369A (en) * 2002-06-19 2004-01-22 Yutaka Hosokawa Protection fence
JP2007077672A (en) * 2005-09-14 2007-03-29 Yoshida Kouzou Design:Kk Shock absorbing fence
JP2009150097A (en) * 2007-12-20 2009-07-09 Shibata Ind Co Ltd Shock absorber and flow-down object catching device using it

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012225036A (en) * 2011-04-19 2012-11-15 Raiteku:Kk Guard fence
WO2015102032A1 (en) * 2014-01-06 2015-07-09 株式会社プロテックエンジニアリング Support post structure for safety fence
JP2018100484A (en) * 2016-12-19 2018-06-28 吉佳エンジニアリング株式会社 Rockfall protection fence
JP6990474B1 (en) * 2021-07-20 2022-01-12 株式会社プロテックエンジニアリング Guard rail
JP7079542B1 (en) * 2022-02-24 2022-06-02 株式会社プロテックエンジニアリング Standing structure of guard rail columns

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