JP2017198008A - Installation structure, base member, and installation method of bridge guard fence - Google Patents

Installation structure, base member, and installation method of bridge guard fence Download PDF

Info

Publication number
JP2017198008A
JP2017198008A JP2016090835A JP2016090835A JP2017198008A JP 2017198008 A JP2017198008 A JP 2017198008A JP 2016090835 A JP2016090835 A JP 2016090835A JP 2016090835 A JP2016090835 A JP 2016090835A JP 2017198008 A JP2017198008 A JP 2017198008A
Authority
JP
Japan
Prior art keywords
ground cover
base member
bridge
anchor
column
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2016090835A
Other languages
Japanese (ja)
Other versions
JP6691808B2 (en
Inventor
充洋 北野
Mitsuhiro Kitano
充洋 北野
佐川 就一
Shuichi Sagawa
就一 佐川
圭祐 中野
Keisuke Nakano
圭祐 中野
橋本 徹
Toru Hashimoto
徹 橋本
陽介 谷
Yosuke Tani
陽介 谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sekisui Jushi Corp
Hinode Ltd
Original Assignee
Sekisui Jushi Corp
Hinode Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sekisui Jushi Corp, Hinode Ltd filed Critical Sekisui Jushi Corp
Priority to JP2016090835A priority Critical patent/JP6691808B2/en
Publication of JP2017198008A publication Critical patent/JP2017198008A/en
Application granted granted Critical
Publication of JP6691808B2 publication Critical patent/JP6691808B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Bridges Or Land Bridges (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an installation structure of a bridge guard fence that ensures sufficient strength even when a ground cover is narrow.SOLUTION: An installation structure for a bridge guard fence includes: a plurality of anchor bolts B1 fitted on a top surface of a ground cover W of a road bridge and arranged to form two or more rows in a direction of extension of the ground cover W; a base member 3 fixed to project outward in a bridge width direction from the ground cover W; a support post 1 fixed on the base member 3; and a beam fitted on the support post 1. The base member 3 includes a plurality of anchor bolt fitting holes 311 through which each of the plurality of anchor bolts B1 penetrates. An interval between the plurality of anchor bolt fitting holes 311 arranged in the direction of extension of the ground cover W is of a ratio between 0.5 and 3.0 with respect to an embedded depth of the plurality of anchor bolts B1 into the ground cover W.SELECTED DRAWING: Figure 1

Description

本発明は、特に既設橋梁用防護柵の更新に好適である橋梁用防護柵の設置構造、橋梁用防護柵用のベース部材、そして、橋梁用防護柵の設置工法に関する。   The present invention relates to an installation structure of a bridge protection fence, particularly a base member for the bridge protection fence, and an installation method of the bridge protection fence, which are particularly suitable for renewing an existing bridge protection fence.

近年、老朽化した道路構造物などの社会インフラが損傷することにより、死傷者の発生するような重大事故が発生している。このため、老朽化した社会インフラの更新が急務となっており、この更新が国や自治体によって推進されている。   In recent years, serious accidents such as casualties have occurred due to damage to social infrastructure such as aging road structures. For this reason, renewal of aging social infrastructure is urgently needed, and this renewal is promoted by the government and local governments.

これに関連した既設橋梁用防護柵の更新工法につき、例えば、本願の出願人等により特許文献1に記載された工法が提案されている。この工法は、まず、コンクリート製の地覆から既設の橋梁用防護柵を除去し、更に、既設アンカーボルトにおいて地覆から突出した部分を除去する。この後、地覆に新しいアンカーボルト(例えば後施工アンカーボルト)を設置することで、地覆に新しい橋梁用防護柵を取り付ける工法である。   Regarding the renewal method of the existing bridge guard fence related to this, for example, the method described in Patent Document 1 has been proposed by the applicant of the present application. This method first removes the existing bridge guard fence from the concrete ground cover, and further removes the portion of the existing anchor bolt protruding from the ground cover. Thereafter, a new anchor bolt (for example, post-installed anchor bolt) is installed on the ground cover, and a new bridge protection fence is attached to the ground cover.

ところで、特に自治体(都道府県及び市区町村)が管理する橋梁(道路用橋梁)は、国が管理する橋梁に比べて、例えば設置時期が古かったり橋長が短かったりすること等により地覆の幅が狭く形成されていることが多い。このような幅の狭い地覆に対しては、従来、既設橋梁用防護柵を更新する際、新しいアンカーボルトを地覆の延長方向に向かって複数列に設置できず、新しいアンカーボルトを地覆に深く埋め込むことで対処していた。   By the way, bridges (road bridges) that are managed by local governments (prefectures and municipalities) in particular are less likely to cover the ground due to, for example, the installation time being shorter or the length of the bridge being shorter than bridges managed by the government. In many cases, the width is narrow. For such a narrow ground cover, conventionally, when updating an existing bridge guard fence, new anchor bolts cannot be installed in multiple rows in the direction of the ground cover extension. It was dealt with by embedding it deeply.

しかし、幅の狭い地覆に後施工アンカーボルトを設置する場合、車両衝突に耐えうるコンクリートの有効せん断面積を確保するためにアンカーボルトを深く埋め込む必要があるが、例えば古い橋梁は地覆高が低く、床版までの距離が小さいため、アンカーボルトを十分な埋め込み深さで設置困難なケースが多い。このため、例えば橋梁用防護柵に車両が衝突した場合、この衝突によりアンカーボルトにかかる力によりアンカーボルトが地覆から引き抜かれてしまうことで、橋梁用防護柵が河川に落下し、それと共に車両も河川に落下してしまう可能性があって問題であった。また、アンカーボルトを設置できたとしても、地覆の幅が狭いことにより、道路構造令において定められた建築限界を確保できないケースが多くある。   However, when post-installed anchor bolts are installed on a narrow ground cover, it is necessary to embed the anchor bolts deeply in order to secure an effective shear area of concrete that can withstand vehicle collisions. Since it is low and the distance to the floor slab is small, there are many cases where it is difficult to install the anchor bolt with a sufficient embedding depth. For this reason, for example, when a vehicle collides with a guard fence for a bridge, the anchor bolt is pulled out from the ground cover by the force applied to the anchor bolt due to this collision, so that the guard fence for the bridge falls into the river and the vehicle There was also a problem that could fall into the river. Moreover, even if an anchor bolt can be installed, there are many cases where the building limit defined in the road structure ordinance cannot be secured due to the narrow width of the ground cover.

また、既設地覆を除去した上で拡幅した地覆を再度形成する方法もあるが、工事が大掛かりとなるために工期が長くかかり、長期にわたり交通規制が必要になる等、周囲に与える影響が大きい。そして、拡幅した地覆は拡幅前より重量が増加するため、橋梁の床版や橋脚にかかる負担が大きくなってしまう。   In addition, there is a method of re-forming the widened ground cover after removing the existing ground cover, but because the construction becomes large, the construction period is long and traffic control is required over a long period of time. large. And since the weight of the widened ground cover increases from before the widening, the load on the bridge slab and the pier is increased.

また、地覆の橋梁幅方向外面(橋梁上の道路に面する側とは反対側の面、または河川側の面)にアンカーボルトにより金具を固定し、その金具に新しい支柱を取り付ける方法もあるが、金具を固定するアンカーボルトに常時引き抜き荷重がかかる可能性があるから、安全性及び耐久性に難がある。そして、地覆の橋梁幅方向外面にアンカーボルトを施工するためには、河川上に仮設足場を組む必要があるので工事施工コストが増加する。   There is also a method to fix the bracket with anchor bolts on the outer surface of the bridge in the width direction of the bridge (the surface on the opposite side of the road facing the road or the surface on the river side) and attach a new strut to the bracket. However, since there is a possibility that a pulling load is always applied to the anchor bolt for fixing the metal fitting, there is a difficulty in safety and durability. And, in order to construct anchor bolts on the outer surface in the bridge width direction of the ground cover, it is necessary to assemble a temporary scaffold on the river, so the construction cost increases.

特許第5190599号公報Japanese Patent No. 5190599

そこで本発明は前記問題に鑑み、幅の狭い地覆であっても十分に強度を確保できる橋梁用防護柵の設置構造、橋梁用防護柵用のベース部材、橋梁用防護柵の設置工法を提供することを課題とする。   In view of the above problems, the present invention provides an installation structure of a bridge protection fence, a base member for the bridge protection fence, and an installation method of the bridge protection fence that can sufficiently secure strength even in a narrow ground cover. The task is to do.

本発明は、道路用橋梁における地覆上面に取り付けられ、地覆の延長方向に向かって2列以上となるように配置される複数のアンカーボルトと、地覆から橋梁幅方向外側に張り出すように、前記複数のアンカーボルトによって固定されるベース部材と、前記ベース部材上に固定される支柱と、前記支柱に取り付けられる横梁と、を備え、前記ベース部材は、前記複数のアンカーボルトの各々が貫通する複数のアンカーボルト取付孔を備え、前記複数のアンカーボルト取付孔は、地覆の延長方向における配置の間隔につき、前記複数のアンカーボルトの地覆への埋め込み深さを基準とした比率で0.5〜3.0となる間隔で配置された橋梁用防護柵の設置構造である。   The present invention provides a plurality of anchor bolts that are attached to the upper surface of a ground cover in a road bridge and are arranged in two or more rows in the extending direction of the ground surface, and project from the ground surface to the outside in the bridge width direction. A base member fixed by the plurality of anchor bolts, a support post fixed on the base member, and a cross beam attached to the support post, wherein the base member includes each of the plurality of anchor bolts. A plurality of anchor bolt mounting holes penetrating therethrough, wherein the plurality of anchor bolt mounting holes is a ratio based on the embedding depth of the plurality of anchor bolts in the ground cover with respect to the arrangement interval in the extending direction of the ground cover. This is an installation structure of bridge guard fences arranged at intervals of 0.5 to 3.0.

また本発明は、道路用橋梁における地覆上面に取り付けられ、地覆の延長方向に向かって2列以上となるように配置される複数のアンカーボルトの各々が貫通する複数のアンカーボルト取付孔と、橋梁用防護柵の支柱を取り付ける支柱取付用ボルト孔と、を備え、地覆に対して固定された場合に、地覆の橋梁幅方向における外面よりも一端が外方に位置し、前記複数のアンカーボルト取付孔は、地覆の延長方向における配置の間隔につき、前記複数のアンカーボルトの地覆への埋め込み深さを基準とした比率で0.5〜3.0となる間隔で配置されたベース部材である。   Further, the present invention is provided with a plurality of anchor bolt mounting holes that are attached to the top surface of the ground in the road bridge and through which each of the plurality of anchor bolts arranged so as to be in two or more rows in the extending direction of the ground cover. A pillar mounting bolt hole for mounting a bridge guard fence post, and when fixed to the ground cover, one end is located outward from the outer surface in the bridge width direction of the ground cover, the plurality The anchor bolt mounting holes are arranged at intervals of 0.5 to 3.0 with respect to the arrangement interval in the extending direction of the ground cover in a ratio based on the embedding depth of the plurality of anchor bolts in the ground cover. Base member.

これらの構成によると、地覆と支柱との間にベース部材を設けることで支柱を地覆からずらせて配置できる。このようにずらせて配置した分、幅の狭い地覆であっても、地覆上面に、地覆の延長方向に向かって2列以上となるように配置される複数のアンカーボルトを取り付ける十分なスペースが確保される。このため、幅の狭い地覆であっても複数のアンカーボルトを用いて支柱を固定できる。よって、複数のアンカーボルトにより支柱が十分な強度で固定される。   According to these structures, a support | pillar can be displaced from a ground cover by providing a base member between a ground cover and a support | pillar. A sufficient amount of anchor bolts to be arranged in two or more rows in the extending direction of the ground cover on the top surface of the ground cover is sufficient even if the ground cover has a narrow width by the amount of the displacement. Space is reserved. For this reason, even if it is a narrow ground cover, a pillar can be fixed using a plurality of anchor bolts. Therefore, the column is fixed with sufficient strength by the plurality of anchor bolts.

更に、複数のアンカーボルト取付孔が、地覆の延長方向における配置の間隔につき、複数のアンカーボルトの地覆への埋め込み深さを基準とした比率で0.5〜3.0となる間隔で配置されたため、少なくとも地覆の延長方向でのアンカーボルト取付孔の間隔に応じて、地覆を構成するコンクリートにコーン破壊が生じる領域を隣接するコーン破壊が生じる領域から適度に離すことができるので、アンカーボルトに働く引き抜き方向の外力、及び、水平方向の外力に対する強度を向上できる。   Furthermore, the plurality of anchor bolt mounting holes are arranged at intervals of 0.5 to 3.0 in terms of the interval of arrangement in the extending direction of the ground cover, with the ratio based on the embedding depth of the plurality of anchor bolts in the ground cover. Because it is arranged, the area where the cone breakage occurs in the concrete that constitutes the cover can be separated from the adjacent cone breakage area at least according to the distance between the anchor bolt mounting holes in the extension direction of the cover. The strength against the external force in the pulling direction acting on the anchor bolt and the external force in the horizontal direction can be improved.

また本発明は、道路用橋梁における地覆上面に取り付けられ、地覆の延長方向に向かって2列以上となるように配置される複数のアンカーボルトと、地覆から橋梁幅方向外側に張り出すように、前記複数のアンカーボルトによって固定されるベース部材と、前記ベース部材上に固定される支柱と、前記支柱に取り付けられる横梁と、を備え、前記ベース部材は、前記複数のアンカーボルトの各々が貫通する複数のアンカーボルト取付孔を備え、前記複数のアンカーボルト取付孔は、橋梁幅方向の外側の列における孔間隔よりも内側の列における孔間隔が大きい橋梁用防護柵の設置構造である。   The present invention also includes a plurality of anchor bolts that are attached to the upper surface of the ground cover of the road bridge and are arranged in two or more rows in the extending direction of the ground cover, and project outward from the ground surface in the bridge width direction. A base member fixed by the plurality of anchor bolts, a support post fixed on the base member, and a cross beam attached to the support post, wherein the base member is each of the plurality of anchor bolts Is provided with a plurality of anchor bolt mounting holes, wherein the plurality of anchor bolt mounting holes is an installation structure of a guard fence for a bridge in which the hole interval in the inner row is larger than the hole interval in the outer row in the bridge width direction. .

また本発明は、道路用橋梁における地覆上面に取り付けられ、地覆の延長方向に向かって2列以上となるように配置される複数のアンカーボルトの各々が貫通する複数のアンカーボルト取付孔と、橋梁用防護柵の支柱を取り付ける支柱取付用ボルト孔と、を備え、地覆に対して固定された場合に、地覆の橋梁幅方向における外面よりも一端が外方に位置し、前記複数のアンカーボルト取付孔は、橋梁幅方向の外側の列における孔間隔よりも内側の列における孔間隔が大きいベース部材である。   Further, the present invention is provided with a plurality of anchor bolt mounting holes that are attached to the top surface of the ground in the road bridge and through which each of the plurality of anchor bolts arranged so as to be in two or more rows in the extending direction of the ground cover. A pillar mounting bolt hole for mounting a bridge guard fence post, and when fixed to the ground cover, one end is located outward from the outer surface in the bridge width direction of the ground cover, the plurality The anchor bolt mounting hole is a base member having a hole interval in the inner row larger than a hole interval in the outer row in the bridge width direction.

これらの構成によると、地覆と支柱との間にベース部材を設けることで支柱を地覆からずらせて配置できる。このようにずらせて配置した分、幅の狭い地覆であっても、地覆上面に、地覆の延長方向に向かって2列以上となるように配置される複数のアンカーボルトを取り付ける十分なスペースが確保される。このため、幅の狭い地覆であっても複数のアンカーボルトを用いて支柱を固定できる。よって、複数のアンカーボルトにより支柱が十分な強度で固定される。   According to these structures, a support | pillar can be displaced from a ground cover by providing a base member between a ground cover and a support | pillar. A sufficient amount of anchor bolts to be arranged in two or more rows in the extending direction of the ground cover on the top surface of the ground cover is sufficient even if the ground cover has a narrow width by the amount of the displacement. Space is reserved. For this reason, even if it is a narrow ground cover, a pillar can be fixed using a plurality of anchor bolts. Therefore, the column is fixed with sufficient strength by the plurality of anchor bolts.

更に、地覆の延長方向に向かって2列以上となるように配置される複数のアンカーボルト取付孔の孔間隔につき、橋梁幅方向の外側の列における孔間隔よりも内側の列における孔間隔が大きいため、前記各列方向かつ橋梁幅方向でのアンカーボルト取付孔の間隔に応じて、地覆を構成するコンクリートにコーン破壊が生じる領域を隣接するコーン破壊が生じる領域から適度に離すことができるので、アンカーボルトに働く引き抜き方向の外力、及び、水平方向の外力に対する強度を向上できる。   Furthermore, with respect to the hole spacing of the plurality of anchor bolt mounting holes arranged so that there are two or more rows in the extending direction of the ground cover, the hole spacing in the inner row is larger than the hole spacing in the outer row in the bridge width direction. Since it is large, the area where the cone breakage occurs in the concrete constituting the ground cover can be appropriately separated from the area where the adjacent cone breakage occurs according to the distance between the anchor bolt mounting holes in each row direction and in the bridge width direction. Therefore, the strength against the external force in the pulling direction acting on the anchor bolt and the external force in the horizontal direction can be improved.

また、前記ベース部材の、地覆に対する前記橋梁幅方向外側への張り出しは、前記ベース部材の底面と地覆の橋梁幅方向における外面との間に空間を有するようになされるようにできる。   Further, the base member can be projected outward in the bridge width direction with respect to the ground cover so as to have a space between the bottom surface of the base member and the outer surface in the bridge width direction of the ground cover.

この構成によると、ベース部材の底面と地覆の橋梁幅方向における外面(橋梁上の道路に面する側とは反対側の面、または河川側の面)との間に空間を有するよう構成することで、ベース部材に橋梁幅方向外側へ倒れ込む外力がかかった場合でも、この外力が地覆の橋梁幅方向における外面に伝わらないため、地覆が破壊されることを抑制できる。   According to this configuration, there is a space between the bottom surface of the base member and the outer surface in the bridge width direction of the ground cover (the surface on the opposite side of the road facing the road or the surface on the river side). Thus, even when an external force that falls to the outer side in the bridge width direction is applied to the base member, the external force is not transmitted to the outer surface in the bridge width direction of the ground cover, so that the ground cover can be prevented from being destroyed.

また、前記支柱は、前記ベース部材に対してボルトにより固定され、前記ベース部材は、前記支柱を固定するためのボルトの下方延長方向に、前記ボルトに当接可能であって、前記空間に面する蓋部材を備えるようにできる。   Further, the support column is fixed to the base member by a bolt, and the base member is capable of contacting the bolt in a downward extending direction of the bolt for fixing the support column, and faces the space. It is possible to provide a lid member that performs.

この構成によると、蓋部材により、支柱を固定する前の状態のボルトが前記空間に脱落することを防止できる。   According to this structure, it can prevent that the volt | bolt of the state before fixing a support | pillar falls out to the said space by a cover member.

また本発明は、地覆に複数のアンカーボルトを埋め込む工程と、地覆上に、前記ベース部材を配置し、前記アンカーボルトにナットをねじ込むことにより、地覆に対して前記ベース部材を固定する工程と、前記ベース部材上に支柱を載せ、前記支柱取付用ボルト孔に取り付けられた状態とされたボルトにナットをねじ込むことで、前記支柱を前記ベース部材に取り付ける工程と、前記支柱に横梁を取り付ける工程と、を有する橋梁用防護柵の設置工法である。   The present invention also includes a step of embedding a plurality of anchor bolts in the ground cover, and disposing the base member on the ground cover, and fixing the base member to the ground cover by screwing a nut into the anchor bolt. A step of mounting the column to the base member by placing a column on the base member and screwing a nut into a bolt mounted in the column mounting bolt hole; A method of installing a guard fence for a bridge having a mounting process.

この方法によると、幅の狭い地覆であっても支柱を十分な強度で固定した橋梁用防護柵を提供できる。   According to this method, it is possible to provide a guard fence for a bridge in which a column is fixed with sufficient strength even in a narrow ground cover.

本発明によると、地覆と支柱との間にベース部材を設けることで、地覆に対して支柱が十分な強度で固定される。よって、幅の狭い地覆であっても十分に強度を確保できる橋梁用防護柵の設置構造、橋梁用防護柵用のベース部材、橋梁用防護柵の設置工法を提供できる。   According to the present invention, by providing the base member between the ground cover and the support column, the support column is fixed to the ground cover with sufficient strength. Therefore, it is possible to provide an installation structure of a bridge protection fence, a base member for the bridge protection fence, and an installation method of the bridge protection fence that can sufficiently secure strength even in a narrow ground cover.

本発明につき、一実施形態に係る橋梁用防護柵(横梁を除く)を地覆上に設けた状態を示す、斜め上方から見た場合の斜視図である。It is a perspective view at the time of seeing from the diagonally upper direction which shows the state which provided the guard fence for bridges (except a cross beam) concerning one embodiment on the ground cover concerning this invention. 同橋梁用防護柵(横梁を除く)で地覆を図示省略した状態を示す、斜め下方から見た場合の斜視図である。It is a perspective view at the time of seeing from the diagonally lower direction which shows the state which abbreviate | omitted the ground cover by the protective fence for bridges (except a horizontal beam). 同橋梁用防護柵(横梁を除く)を地覆上に設けた状態を示し、(a)は正面図、(b)は平面図、(c)は(b)のI−I矢視の縦断面図(横梁を二点鎖線で表示)である。The protection fence for the bridge (excluding the horizontal beam) is shown on the ground cover, (a) is a front view, (b) is a plan view, and (c) is a longitudinal section taken along line II in (b). It is a surface figure (a horizontal beam is displayed with a dashed-two dotted line). 同橋梁用防護柵のベース部材を示し、(a)は斜め上方から見た場合の斜視図、(b)は斜め下方から見た場合の斜視図である。The base member of the protection fence for bridges is shown, (a) is a perspective view at the time of seeing from diagonally upward, (b) is a perspective view at the time of seeing from diagonally downward. 同橋梁用防護柵のベース部材を示し、(a)は平面図、(b)は底面図、(c)は(b)のII−II矢視の縦断面図である。The base member of the protection fence for bridges is shown, (a) is a top view, (b) is a bottom view, (c) is a longitudinal cross-sectional view of the II-II arrow of (b). 本発明につき、全体カバーを備えた実施形態に係る橋梁用防護柵を地覆上に設けた状態を示し、(a)は正面図、(b)は平面図、(c)は(b)のIII−III矢視の縦断面図である。The present invention shows a state in which a guard fence for a bridge according to an embodiment provided with an entire cover is provided on the ground cover, (a) is a front view, (b) is a plan view, and (c) is a view of (b). It is a longitudinal cross-sectional view of III-III arrow. 橋梁用防護柵の設置工法につき、(a)〜(f)に順を追って示した概略図である。It is the schematic shown in order for (a)-(f) about the installation construction method of the guard fence for bridges.

次に、本発明につき実施形態を取り上げて説明を行う。なお、本実施形態はあくまでも本発明を理解するための一例を示したに過ぎず、各部の形状、構造、材質等に関し、本実施形態以外のバリエーションが、本発明の要旨を逸脱しない範囲内で許容されていることは言うまでもない。   Next, embodiments of the present invention will be described. Note that this embodiment is merely an example for understanding the present invention, and variations other than the present embodiment regarding the shape, structure, material, and the like of each part are within the scope of the present invention. It goes without saying that it is allowed.

また、以下説明における「前後左右」の表現は、図1、図4(a)(b)、図5(a)に記載した方向に基づき、「上下方向」の表現は、図1に記載した方向に基づいている。   In addition, the expression “front / rear / left / right” in the following description is based on the directions described in FIGS. 1, 4A, 4B, and 5A, and the expression “vertical direction” is described in FIG. Based on direction.

本実施形態の橋梁用防護柵の設置構造として、図1、図2、図3(a)〜(c)に示すように構成され、「高欄」とも呼ばれる支柱1及び横梁2(図3(c)にのみ示す)が組み合わされてなる橋梁用防護柵に加え、地覆Wと支柱1との間に配置されるアタッチメントとして機能するベース部材3を備える。   As shown in FIG. 1, FIG. 2, FIG. 3 (a) to (c), the installation structure of the bridge guard fence according to the present embodiment is configured as shown in FIG. 1, FIG. In addition to the bridge guard fence formed by combining (only)), a base member 3 functioning as an attachment disposed between the ground cover W and the support column 1 is provided.

ベース部材3は鋳鉄製(より詳しくはダクタイル鋳鉄製)である。ただし、ベース部材3の素材はこれに限定されず、例えばアルミ鋳物、鉄、ステンレス合金等、種々の素材で形成できる。このベース部材3は、図4(a)(b)及び図5(a)〜(c)に示す形状のものである。このベース部材3は、図1及び図3(a)〜(c)に示すように地覆W上に配置される場合において、前方が橋梁上の道路に面するように位置し、左右方向が地覆Wの延長方向(左右方向)に位置する。このベース部材3は、地覆Wから後方、つまり橋梁幅方向(前後方向)外側に張り出すように地覆W上に固定される。   The base member 3 is made of cast iron (more specifically, made of ductile cast iron). However, the material of the base member 3 is not limited to this, and can be formed of various materials such as an aluminum casting, iron, and a stainless alloy. The base member 3 has a shape shown in FIGS. 4A and 4B and FIGS. 5A to 5C. When the base member 3 is disposed on the ground cover W as shown in FIG. 1 and FIGS. 3A to 3C, the base member 3 is positioned so that the front faces the road on the bridge, and the horizontal direction is It is located in the extending direction (left-right direction) of the ground cover W. The base member 3 is fixed on the ground cover W so as to protrude rearward from the ground cover W, that is, outward in the bridge width direction (front-rear direction).

ベース部材3における前方寄りの位置にはアンカーボルト取付部31が形成されている。このアンカーボルト取付部31には4個のアンカーボルト取付孔311が形成されており、地覆Wに上面から埋め込まれたアンカーボルトB1に対してナット止めで締結される。なお、アンカーボルトB1は上下方向に延びるように地覆Wに埋め込まれる。アンカーボルト取付孔311は、左右方向に長い長孔、つまり、地覆Wへの設置時において地覆Wの延長方向(左右方向)に沿って延びる長孔とされている。なお、地覆Wの延長方向は橋梁幅方向に対して交わる(本実施形態では直交する)方向である。このようにアンカーボルト取付孔311が長孔とされたことにより、例えばアンカーボルトB1の設置予定位置に地覆W内部の鉄筋が存在する場合、鉄筋を避けるためにアンカーボルトB1をずらせて設置できる。   An anchor bolt mounting portion 31 is formed at a position near the front of the base member 3. The anchor bolt mounting portion 31 is formed with four anchor bolt mounting holes 311 and is fastened with nuts to the anchor bolt B1 embedded in the ground cover W from the upper surface. The anchor bolt B1 is embedded in the ground cover W so as to extend in the vertical direction. The anchor bolt mounting hole 311 is a long hole extending in the left-right direction, that is, a long hole extending along the extending direction (left-right direction) of the ground cover W when installed on the ground cover W. In addition, the extending direction of the ground cover W is a direction intersecting (orthogonal in the present embodiment) with respect to the bridge width direction. Thus, when the anchor bolt mounting hole 311 is a long hole, for example, when there is a reinforcing bar inside the ground cover W at a position where the anchor bolt B1 is to be installed, the anchor bolt B1 can be shifted and installed to avoid the reinforcing bar. .

本実施形態のアンカーボルト取付部31には地覆Wの延長方向に向かって2列で4個のアンカーボルト取付孔311が形成されているが、アンカーボルト取付孔311の形成数はこれに限定されない。例えば、3列以上とすることができ、また、アンカーボルト取付孔311として形成された一つの長孔を共用するようにして、2本のアンカーボルトB1が取り付けられるようアンカーボルト取付部31を構成することもできる。   In the anchor bolt mounting portion 31 of this embodiment, four anchor bolt mounting holes 311 are formed in two rows in the extending direction of the ground cover W, but the number of anchor bolt mounting holes 311 formed is limited to this. Not. For example, the anchor bolt mounting portion 31 can be configured so that two anchor bolts B1 can be mounted so as to share three elongated holes formed as the anchor bolt mounting holes 311. You can also

アンカーボルト取付部31は、図4(a)及び図5(a)(c)に示すように凹部312を有する。凹部312は前方に開放された空間を有している。このため、アンカーボルトB1を締め付けるための工具がベース部材3に干渉しにくく、作業員による締め付け作業を円滑に行うことができる。一つの凹部312には、前後左右方向にずれた二つのアンカーボルト取付孔311が形成されている。   The anchor bolt mounting portion 31 has a recess 312 as shown in FIGS. 4 (a) and 5 (a) (c). The recess 312 has a space opened forward. For this reason, the tool for tightening the anchor bolt B1 hardly interferes with the base member 3, and the tightening operation by the worker can be performed smoothly. Two recesses 312 are formed with two anchor bolt mounting holes 311 that are displaced in the front-rear and left-right directions.

ベース部材3の1台あたり、本実施形態では4個のアンカーボルト取付孔311が形成されている。図5(a)に示すように、そのうち後側(橋梁幅方向の外側)の列に位置する2個は左右方向で相対的に小さい間隔(孔間隔)W311bで設けられ、前側(橋梁幅方向の内側)の列に位置する2個は左右方向で相対的に大きい間隔(孔間隔)W311fで設けられている。つまり、前後各列に属するアンカーボルト取付孔311は、前後方向にずれて配置されている。なお、これに限定されず、例えば、前方に位置する2個と後方に位置する2個とを同一間隔で設けることで、各列に属するアンカーボルト取付孔311が、前後方向に一致して配置されていてもよい。また、アンカーボルト取付孔311の左右方向間隔W311b,W311fは、支柱1の幅寸法(地覆Wの延長方向における寸法)よりも大きく設定することが好ましい。アンカーボルトB1を支柱1の幅寸法よりも小さい間隔で配置した場合、アンカー強度の十分な発揮が期待できないからである。   In this embodiment, four anchor bolt mounting holes 311 are formed for each base member 3. As shown in FIG. 5 (a), two of them located in the rear row (outside in the bridge width direction) are provided with a relatively small interval (hole interval) W311b in the left-right direction, and the front side (in the bridge width direction). Are located at a relatively large gap (hole gap) W311f in the left-right direction. That is, the anchor bolt mounting holes 311 belonging to the front and rear rows are arranged so as to be shifted in the front-rear direction. However, the present invention is not limited to this, and for example, by providing two pieces located in the front and two pieces located in the rear at the same interval, the anchor bolt mounting holes 311 belonging to each row are arranged in the front-rear direction. May be. Further, it is preferable that the left and right intervals W311b and W311f of the anchor bolt mounting hole 311 are set larger than the width dimension of the support column 1 (dimension in the extending direction of the ground cover W). This is because when the anchor bolts B1 are arranged at an interval smaller than the width dimension of the support column 1, sufficient anchor strength cannot be expected.

複数のアンカーボルト取付孔311は、地覆Wの延長方向における配置の間隔につき、複数のアンカーボルトB1の地覆Wへの埋め込み深さDB1(図3(c)参照)を基準とした比率で0.5〜3.0、好ましくは、地覆Wの押抜せん断面積が最大になる条件から、前記比率で0.5〜2.0となる間隔で配置されている。なお、複数のアンカーボルトB1の埋め込み深さDB1は、個々の寸法にばらつきがある場合には平均値を用いるものとする。この配置により、少なくとも地覆Wの延長方向でのアンカーボルト取付孔311の間隔に応じて、地覆Wを構成するコンクリートにコーン破壊(下すぼみの円錐形状の破壊であって、破壊深さは埋め込み深さDB1に対応する)が生じる領域を隣接するコーン破壊が生じる領域から適度に離すことができる。つまり、複数のコーン破壊が生じる領域を極力重ならないようにできる。特に、各列に属するアンカーボルト取付孔311(本実施形態では後側(橋梁幅方向の外側)の列に位置するアンカーボルト取付孔311と、前側(橋梁幅方向の内側)の列に位置するアンカーボルト取付孔311)が左右方向にずれて配置された場合には、各列に属するアンカーボルト取付孔311が前後にまっすぐ並んで配置された場合と比べ、前後各列の間隔が同一でも、前記コーン破壊が生じる領域を容易に離すことができる。本実施形態のように複数のアンカーボルト取付孔311を配置することで、アンカーボルトB1に働く引き抜き方向の外力、及び、水平方向の外力に対する強度を向上できる。このため、コンクリートの体積が十分に確保できない、幅の狭い地覆Wであっても、複数のアンカーボルトB1により確実にベース部材3を支持できる。   The plurality of anchor bolt mounting holes 311 is a ratio based on the embedding depth DB1 (see FIG. 3C) of the plurality of anchor bolts B1 in the ground cover W with respect to the arrangement interval in the extending direction of the ground cover W. It is 0.5-3.0, Preferably, it arrange | positions by the space | interval which becomes 0.5-2.0 by the said ratio from the conditions from which the punching shear area of the ground cover W becomes the maximum. It should be noted that an average value is used as the embedding depth DB1 of the plurality of anchor bolts B1 when there are variations in individual dimensions. According to this arrangement, the concrete constituting the ground cover W is destroyed by cone according to the distance between the anchor bolt mounting holes 311 in at least the extending direction of the ground cover W. A region where the corresponding (development depth DB1) occurs can be appropriately separated from an adjacent region where cone fracture occurs. That is, it is possible to avoid overlapping regions where a plurality of cone breaks occur as much as possible. In particular, the anchor bolt mounting holes 311 belonging to each row (in this embodiment, the anchor bolt mounting holes 311 located in the row on the rear side (outside in the bridge width direction) and the row on the front side (inside in the bridge width direction) are located. When the anchor bolt mounting holes 311) are arranged so as to be shifted in the left-right direction, even if the distance between the front and rear rows is the same as compared to the case where the anchor bolt mounting holes 311 belonging to each row are arranged straight forward and backward, The region where the cone breakage occurs can be easily separated. By arranging the plurality of anchor bolt mounting holes 311 as in the present embodiment, it is possible to improve the external force in the pulling direction acting on the anchor bolt B1 and the strength against the external force in the horizontal direction. Therefore, the base member 3 can be reliably supported by the plurality of anchor bolts B1 even in the case of the narrow ground cover W in which the volume of the concrete cannot be sufficiently secured.

ベース部材3は、底面3aから上面3bまでの距離(凹部312の上端からベース部材3の底面3aまでの距離)が、地覆Wの上面からアンカーボルトB1が突出する高さよりも大きいものとされている。このため、図3(a)(c)に示すように、地覆Wから突出したアンカーボルトB1の上端部分をこの凹部312に納めるようにでき、ベース部材3の上面3bから突出しないようにできる。よって、後述のカバー5を設けない場合にあっては、地覆W上にベース部材3を取り付けた際の美観に優れる。更に、もし車両がベース部材3上に乗り上げた場合であっても、アンカーボルトB1が三方から「壁」で囲まれた状態となっていることから、アンカーボルトB1の周囲に何もない状態に比べると、アンカーボルトB1の上端部分がタイヤに当たることを抑制できるため、バースト等のタイヤ損傷が起こりにくい。   In the base member 3, the distance from the bottom surface 3a to the top surface 3b (the distance from the upper end of the recess 312 to the bottom surface 3a of the base member 3) is greater than the height at which the anchor bolt B1 protrudes from the top surface of the ground cover W. ing. Therefore, as shown in FIGS. 3A and 3C, the upper end portion of the anchor bolt B1 protruding from the ground cover W can be accommodated in the recess 312 and can be prevented from protruding from the upper surface 3b of the base member 3. . Therefore, when the cover 5 described later is not provided, the aesthetic appearance when the base member 3 is mounted on the ground cover W is excellent. Furthermore, even if the vehicle rides on the base member 3, the anchor bolt B1 is surrounded by “walls” from three sides, so that there is nothing around the anchor bolt B1. In comparison, since the upper end portion of the anchor bolt B1 can be prevented from hitting the tire, tire damage such as burst is unlikely to occur.

ベース部材3における後方の領域には支柱取付部32が形成されている。この支柱取付部32の上面は支柱1の下端プレート11が配置できる形状とされている。この支柱取付部32には支柱取付用ボルト孔321が形成されており、支柱取付用ボルトB2が取り付けられて、支柱1の下端プレート11が固定される。ベース部材3は図3(c)に示すように、この支柱取付部32において、底面3aから上面3bにわたって必要となる断面性能が確保されており、支柱1及び横梁2の荷重、及び、例えば強風時や車両の衝突時に、支柱1及び横梁2が橋梁幅方向外側(後方)に倒れ込もうとすることによりベース部材3に働く曲げ応力について、ベース部材3の撓みを弾性範囲内とし、材料の耐力値以下におさめることが可能である。   A column attachment portion 32 is formed in the rear region of the base member 3. The upper surface of the column attachment portion 32 is shaped such that the lower end plate 11 of the column 1 can be disposed. A column mounting bolt hole 321 is formed in the column mounting portion 32, and a column mounting bolt B <b> 2 is mounted to fix the lower end plate 11 of the column 1. As shown in FIG. 3C, the base member 3 has a cross-sectional performance required from the bottom surface 3a to the top surface 3b in the column mounting portion 32, and the load of the column 1 and the cross beam 2 and, for example, strong wind The bending force of the base member 3 is set within the elastic range with respect to the bending stress acting on the base member 3 when the column 1 and the cross beam 2 try to fall outside (backward) in the width direction of the bridge at the time of a vehicle collision. It is possible to keep it below the proof stress value.

支柱取付部32に支柱取付用ボルト孔321は4個設けられている。そのうち前方に位置する2個は左右方向で相対的に小さい間隔で設けられ、後方に位置する2個は左右方向で相対的に大きい間隔で設けられている。なお、これに限定されず、例えば、前方に位置する2個と後方に位置する2個とを同一間隔で設けることもできる。図5(c)に示すように、支柱取付用ボルト孔321は底面3a側において拡大された拡大部321aを有する。この拡大部321aは、図4(b)及び図5(b)に示すように、底面視で左右方向に対向する平面321bを有する形状である。支柱取付用ボルトB2として六角ボルトが用いられた場合、図3(c)に示すように、この拡大部321aにはボルト頭部が位置する。ボルト頭部は平面321bに当たることにより、支柱取付用ボルトB2の回り止めがなされる。このため、支柱取付用ボルトB2に対して上面3b側からナットをねじ込むだけでベース部材3に支柱1を固定できる。   Four column mounting bolt holes 321 are provided in the column mounting part 32. Of these, the two positioned forward are provided with a relatively small interval in the left-right direction, and the two positioned rearward are provided with a relatively large interval in the left-right direction. In addition, it is not limited to this, For example, two located in the front and two located in the back can also be provided at the same interval. As shown in FIG.5 (c), the column attachment bolt hole 321 has the enlarged part 321a expanded in the bottom face 3a side. As shown in FIGS. 4B and 5B, the enlarged portion 321a has a shape having a flat surface 321b facing in the left-right direction when viewed from the bottom. When a hexagonal bolt is used as the post mounting bolt B2, as shown in FIG. 3C, the bolt head is positioned at the enlarged portion 321a. The bolt head is brought into contact with the flat surface 321b, thereby preventing the column mounting bolt B2 from rotating. For this reason, the support | pillar 1 can be fixed to the base member 3 only by screwing a nut from the upper surface 3b side with respect to the support | pillar mounting bolt B2.

また図2に示すように、ベース部材3は、支柱1を固定するための支柱取付用ボルトB2の下方延長方向に、支柱取付用ボルトB2に当接可能であって、空間S(図3(c)参照)に面する蓋部材4を備えることもできる。この蓋部材4を設けた場合、支柱1を固定する前の状態の支柱取付用ボルトB2が下方の空間Sに脱落することを有効に防止できる。なお蓋部材4の他、例えばこの拡大部321aに、支柱取付用ボルトB2が支柱取付用ボルト孔321から脱落しないようにする脱落防止機構が設けられ、支柱取付用ボルトB2が脱落しないようにされていてもよい。   Further, as shown in FIG. 2, the base member 3 can abut on the column mounting bolt B2 in the downward extending direction of the column mounting bolt B2 for fixing the column 1 and is in the space S (FIG. 3 ( It is also possible to provide a lid member 4 facing c). When this lid member 4 is provided, it is possible to effectively prevent the column mounting bolt B2 in a state before fixing the column 1 from dropping into the space S below. In addition to the lid member 4, for example, the expansion portion 321 a is provided with a drop-off preventing mechanism for preventing the column mounting bolt B <b> 2 from dropping from the column mounting bolt hole 321, so that the column mounting bolt B <b> 2 does not fall off. It may be.

支柱取付部32はアンカーボルト取付部31に対して後方(地覆Wの橋梁幅方向外側)に離れて位置している。このため、地覆Wと支柱1との間にベース部材3を設けることで支柱1を地覆Wからずらせて配置できる。このようにずらせて配置した分、幅の狭い地覆Wであっても、地覆上面に、地覆Wの延長方向に向かって2列以上(別の表現で表すと、橋梁幅方向の内外に少なくとも2列)となるように配置される複数(本実施形態では4本)のアンカーボルトB1を取り付ける十分なスペースが確保される。なお、前記「地覆Wの延長方向に向かって2列」とは、地覆Wの延長方向(左右方向)に向かう列が、橋梁幅方向(前後方向)に並ぶように2列存在するという意味である。また、前記「2列」には、各列が1本のアンカーボルトB1だけで構成される場合も含まれる。このため、幅の狭い地覆Wであっても、地覆Wの延長方向に向かって2列以上となるように配置される複数のアンカーボルトB1を用いて支柱1を固定できる。よって、複数のアンカーボルトB1により支柱1が十分な強度で固定される。   The column attachment portion 32 is located away from the anchor bolt attachment portion 31 at the rear (outside in the bridge width direction of the ground cover W). For this reason, by providing the base member 3 between the ground cover W and the support 1, the support 1 can be shifted from the cover W. Even if the width of the ground cover W is narrow, the two or more rows in the extending direction of the ground cover W (in other words, the inside and outside of the bridge width direction) A sufficient space for mounting a plurality of (four in this embodiment) anchor bolts B1 arranged so as to be in at least two rows. The “two rows in the extending direction of the ground cover W” means that there are two rows in the extending direction (left and right direction) of the ground cover W so that they are aligned in the bridge width direction (front and rear direction). Meaning. The “two rows” includes a case where each row is composed of only one anchor bolt B1. For this reason, even if it is the ground cover W with a narrow width | variety, the support | pillar 1 can be fixed using the some anchor bolt B1 arrange | positioned so that it may become 2 or more rows toward the extension direction of the ground cover W. Therefore, the support column 1 is fixed with sufficient strength by the plurality of anchor bolts B1.

また、支柱取付用ボルトB2をアンカーボルトB1とは別に設けている。このため、支柱取付用ボルトB2ではベース部材3の変形荷重を負担できることが想定され、この想定を前提とすると、アンカーボルトB1では、橋梁用防護柵に車両が衝突した場合等に生じる引き抜き荷重を負担できるので、支柱取付用ボルトB2とアンカーボルトB1とで負担する荷重を分散できる。よって、アンカーボルトB1の負担すべき荷重が小さくなる分、アンカーボルトB1の地覆Wへの埋め込み深さを小さくできると考えられる。   Further, the column mounting bolt B2 is provided separately from the anchor bolt B1. For this reason, it is assumed that the column mounting bolt B2 can bear the deformation load of the base member 3, and assuming this assumption, the anchor bolt B1 does not have a pulling load generated when a vehicle collides with the bridge guard fence. Since it can bear, the load burdened by the column mounting bolt B2 and the anchor bolt B1 can be dispersed. Therefore, it is considered that the embedding depth of the anchor bolt B1 into the ground cover W can be reduced by the amount of load that should be borne by the anchor bolt B1.

また、アンカーボルトB1と支柱取付用ボルトB2とが互いに干渉しない。よって、地覆Wへのベース部材3の固定と、ベース部材3への支柱1の固定とを別個の工程で行うことができるので、橋梁用防護柵の更新工事を効率良く行うことができる。   Further, the anchor bolt B1 and the column mounting bolt B2 do not interfere with each other. Therefore, since the fixing of the base member 3 to the ground cover W and the fixing of the support column 1 to the base member 3 can be performed in separate steps, the bridge guard fence can be updated efficiently.

なお、本実施形態とは異なり、アンカーボルト取付孔311の一部または全部を支柱取付用ボルト孔321が兼ねることもできる。この場合、アンカーボルトB1の一部または全部を、ベース部材3に対して支柱1を固定するために用いることができる。ただしこの場合では、後述する道路構造令の建築限界に適合させるため、例えば特別な形状の支柱1を用意することが必要になるため、本実施形態のようにアンカーボルト取付孔311と支柱取付用ボルト孔321とは別個に形成することが望ましい。   Note that unlike the present embodiment, a part or all of the anchor bolt mounting hole 311 can also serve as the column mounting bolt hole 321. In this case, a part or all of the anchor bolt B <b> 1 can be used to fix the column 1 to the base member 3. However, in this case, in order to adapt to the construction limit of the road structure ordinance described later, for example, it is necessary to prepare a column 1 having a special shape. Therefore, as in this embodiment, the anchor bolt mounting hole 311 and the column mounting column are used. It is desirable to form it separately from the bolt hole 321.

ベース部材3における後方で、支柱取付部32よりも左右方向端寄りには吊り下げ孔33が形成されている。この吊り下げ孔33に吊りベルト等を通すことにより、重機等を用いてベース部材3を吊り下げることが容易にでき、地覆W上へのベース部材3の配置を容易に行うことができる。この吊り下げ孔33は作業員の持ち手として使用することもでき、その場合、手作業によるベース部材3の運搬が容易となる。また、図4(b)に示すように、ベース部材3で荷重負担に直接寄与しない、支柱取付用ボルト孔321の左右部分には、底面側に開口した肉盗み部34等が形成されており、ベース部材3の軽量化に貢献している。更に、肉盗み部34等の、空間を有する部分を形成することにより、断面係数(断面二次モーメント)を大きくできることから、ベース部材3の強度(剛性)を向上できる。   A suspension hole 33 is formed behind the base member 3 and closer to the end in the left-right direction than the column attachment portion 32. By passing a suspension belt or the like through the suspension hole 33, the base member 3 can be easily suspended using a heavy machine or the like, and the base member 3 can be easily placed on the ground cover W. The suspension hole 33 can also be used as a handle of an operator. In this case, the base member 3 can be easily transported manually. Further, as shown in FIG. 4B, a meat stealing portion 34 opened on the bottom side is formed on the left and right portions of the column mounting bolt holes 321 that do not directly contribute to the load burden on the base member 3. This contributes to the weight reduction of the base member 3. Furthermore, since the section modulus (second moment of section) can be increased by forming a portion having a space such as the meat stealing portion 34, the strength (rigidity) of the base member 3 can be improved.

ベース部材3は、図1及び図3(a)〜(c)に示すように地覆Wに取り付けられた状態で、図示のように前端が地覆W上に位置し、後端が地覆Wよりも後方(橋梁幅方向外側方向)に張り出す。この状態で取り付けられた支柱1は、地覆Wに対して後方(橋梁幅方向外側方向)にオフセットされた状態となるため、幅の狭い地覆Wであっても、後述する道路構造令の建築限界に適合させることができる。   The base member 3 is attached to the ground cover W as shown in FIG. 1 and FIGS. 3A to 3C, the front end is located on the ground cover W as shown, and the rear end is the ground cover. Projects beyond W (outside in the width direction of the bridge). The column 1 attached in this state is in a state of being offset backward (outside in the bridge width direction) with respect to the ground cover W. Can be adapted to building limits.

ベース部材3の、地覆Wに対する橋梁幅方向外側への前記張り出しは、図3(c)に示すように、ベース部材3の底面3aと地覆Wの橋梁幅方向における外面(橋梁上の道路に面する側とは反対側の面、または河川側の面)W1との間に空間Sを有するようになされる。このように構成することで、ベース部材3に橋梁幅方向外側へ倒れ込む外力がかかった場合でも、この外力が地覆Wの橋梁幅方向における外面W1に伝わることがなく、外力が外面W1に伝わることが原因で地覆Wを構成するコンクリートが破壊されるということを抑制できる。   As shown in FIG. 3C, the protrusion of the base member 3 to the outer side in the bridge width direction with respect to the ground cover W is the outer surface (the road on the bridge) of the bottom surface 3a of the base member 3 and the ground width W in the bridge width direction. A space S is formed between the first side W1 and the opposite side or the river side surface. With this configuration, even when an external force is applied to the base member 3 that falls outward in the bridge width direction, the external force is not transmitted to the outer surface W1 in the bridge width direction of the ground cover W, and the external force is transmitted to the outer surface W1. It can suppress that the concrete which comprises the ground cover W is destroyed because of this.

支柱1及び横梁2は、従来用いられていたものと同構造のものを使用できる。支柱1の下端には下端プレート11が設けられている。この下端プレート11とベース部材3を固定部材で締結する。このため、下端プレート11にはボルト貫通孔111が形成されている(図3(c)、図7(d)参照)。なお、本実施形態では、この固定部材として支柱取付用ボルトB2及びナットが用いられているが、その他の締結手段を用いることもできる。また、本実施形態では、支柱取付用ボルトB2として六角ボルトが用いられているが、六角ボルト以外のボルトを用いることもできる。また、場合によっては(具体的にはベース部材3として溶接可能な素材で形成した場合)、下端プレート11をベース部材3に対して溶接することもできる。横梁2は、図3(c)に示すように、支柱1の前方に形成された凹部に取り付けられ、図6(a)に示すように、地覆Wの延長方向に沿って位置する。   The strut 1 and the cross beam 2 can have the same structure as that conventionally used. A lower end plate 11 is provided at the lower end of the column 1. The lower end plate 11 and the base member 3 are fastened with a fixing member. For this reason, a bolt through hole 111 is formed in the lower end plate 11 (see FIGS. 3C and 7D). In the present embodiment, the column mounting bolts B2 and nuts are used as the fixing members, but other fastening means may be used. Moreover, in this embodiment, although the hexagon bolt is used as the support | pillar mounting bolt B2, bolts other than a hexagon bolt can also be used. In some cases (specifically, when the base member 3 is formed of a weldable material), the lower end plate 11 can be welded to the base member 3. As shown in FIG. 3C, the cross beam 2 is attached to a recess formed in front of the support column 1, and is positioned along the extending direction of the ground cover W as shown in FIG.

なお、支柱1とベース部材3とを一体に構成することも可能であり、この構成では、ベース部材3に支柱1を固定する手間が省けるというメリットがある。ただ、この構成では支柱1とベース部材3との結合体の重量が各々の重量よりも大きくなり、場合によっては重機が必要となること、及び、地覆Wに対する支柱1の位置調整がしにくくなるというデメリットがある。更に、支柱1とベース部材3とを一体に構成した場合、例えば支柱1とベース部材3の一方だけが損傷した場合であっても全部を交換しないとならないが、別体で構成しておけば損傷した部分だけを交換できる。これらにより、支柱1とベース部材3とは別体で構成することが望ましい。   In addition, it is also possible to comprise the support | pillar 1 and the base member 3 integrally, and in this structure, there exists an advantage that the effort which fixes the support | pillar 1 to the base member 3 can be saved. However, in this configuration, the weight of the combined body of the support column 1 and the base member 3 is larger than the respective weights, and in some cases, heavy equipment is required, and it is difficult to adjust the position of the support column 1 with respect to the ground cover W. There is a demerit that Further, when the support column 1 and the base member 3 are integrally formed, for example, even if only one of the support column 1 and the base member 3 is damaged, the entire structure must be replaced. Only damaged parts can be replaced. Accordingly, it is desirable that the support column 1 and the base member 3 are configured separately.

ここで、道路構造令(政令)において道路の建築限界が定められている。これによると、車道の外端、つまり、地覆Wの内面から構造物を250mm以上離すことが要求されている。   Here, the road construction limit is defined in the road structure ordinance (decree). According to this, it is required that the structure be separated from the outer end of the roadway, that is, the inner surface of the ground cover W by 250 mm or more.

地覆Wに対してアンカーボルトを設置する場合、地覆W内部の鉄筋、特にフープ筋に囲まれた領域にアンカーボルトB1を配置しないと十分な引き抜き強度を発揮できない。一方、この領域にアンカーボルトを配置しつつ建築限界に適合させることは、特に幅の狭い地覆Wでは難しかった。   When anchor bolts are installed on the ground cover W, sufficient pullout strength cannot be exhibited unless the anchor bolts B1 are arranged in a region surrounded by the reinforcing bars inside the ground cover W, particularly the hoop bars. On the other hand, it is difficult to adapt to the construction limit while arranging anchor bolts in this region, particularly in the case of the narrow ground cover W.

本実施形態では、ベース部材3により支柱1を後方(橋梁幅方向外側方向)にオフセットできるため、地覆Wの内面から、横梁2のうちで最も道路に近い位置までの水平距離X(図3(c)参照)を250mm以上とできる。このため、容易に道路構造令の要求を満たすことができる。本実施形態では、図3(c)に示すように4本のアンカーボルトB1全てが水平距離Xの範囲内に位置している。ただしこれに限定されず、例えば前方に位置するアンカーボルトB1等、複数のアンカーボルトのうち少なくとも一部のみが水平距離Xの範囲内に位置するよう構成されることもできる。以上、支柱1が後方にオフセットされるため、幅の狭い地覆Wを有する橋梁における防護柵の更新を促進できる。また、ベース部材3を用いることにより、支柱1及び横梁2については、建築限界を満たすための特殊な形状のものを用いずに、従来用いられていた形状のものがそのまま使用できる。   In the present embodiment, since the column 1 can be offset backward (in the direction of the bridge width direction) by the base member 3, the horizontal distance X from the inner surface of the ground cover W to the position closest to the road among the horizontal beams 2 (FIG. 3). (See (c)) can be 250 mm or more. For this reason, it is possible to easily satisfy the requirements of the road structure ordinance. In the present embodiment, all four anchor bolts B1 are positioned within the range of the horizontal distance X as shown in FIG. However, the present invention is not limited to this, and for example, at least a part of the plurality of anchor bolts such as the anchor bolt B1 positioned at the front can be configured to be positioned within the range of the horizontal distance X. As mentioned above, since the support | pillar 1 is offset back, the update of the protection fence in the bridge which has the narrow ground cover W can be accelerated | stimulated. Moreover, by using the base member 3, the column 1 and the cross beam 2 can be used as they are, without using a special shape for satisfying the building limit.

本実施形態のアンカーボルトB1は、支柱1の1本当たりで4本が用いられる。なお、3本または5本以上が用いられることもできる。従来のようにアンカーボルトB1の1本当たりの地覆Wへの埋め込み長さを大きくしなくても、本数が多い分、アンカーボルトB1の1本当たりの負担荷重が小さくなるので、相対的に小さい埋め込み長さで十分な引き抜き強度を確保できる。アンカーボルトB1には、ケミカルアンカー等の後施工アンカーを用いることができる。   Four anchor bolts B1 of this embodiment are used for each column 1. Three or five or more can also be used. Even if the embedding length of each anchor bolt B1 in the ground cover W is not increased, the burden load per anchor bolt B1 is reduced as the number of anchor bolts B1 increases. Sufficient pulling strength can be secured with a small embedding length. As the anchor bolt B1, a post-installed anchor such as a chemical anchor can be used.

本実施形態では、ベース部材3を覆うようにカバー5が取り付けられる。このカバー5は、例えば鋼板が略コの字状に曲げ成形されて形成され、図6(a)(b)に示すように、ベース部材3及び地覆Wの上部を覆う全体カバーとして実施することができる。なお、ベース部材3のみを覆うようにしたり、ベース部材3同士の間のみを覆う部分カバーとして実施することもできる。カバー5の取り付けは種々の手段により行うことができる。例えば、ベース部材3への嵌合、ボルト止め、地覆W上に設置したレールへの固定等で行うことができる。なお、カバー5の素材はこれに限定されず、例えばアルミニウム合金や合成樹脂等、種々の素材で形成できる。   In the present embodiment, the cover 5 is attached so as to cover the base member 3. The cover 5 is formed, for example, by bending a steel plate into a substantially U-shape, and is implemented as an entire cover that covers the base member 3 and the upper portion of the ground cover W as shown in FIGS. be able to. In addition, it can also be implemented as a partial cover that covers only the base member 3 or covers only between the base members 3. The cover 5 can be attached by various means. For example, it can be performed by fitting to the base member 3, bolting, fixing to a rail installed on the ground cover W, or the like. In addition, the material of the cover 5 is not limited to this, For example, it can form with various materials, such as an aluminum alloy and a synthetic resin.

このカバー5は、図6(c)に示すように地覆Wから後方に張り出した形状とされている。この後方に張り出した部分は、図6(b)に示すように、ベース部材3の地覆Wに対する張り出しに対応している。   The cover 5 has a shape protruding rearward from the ground cover W as shown in FIG. The rearwardly projecting portion corresponds to the projecting of the base member 3 with respect to the ground cover W as shown in FIG.

カバー5と地覆Wとの間には補強材6が配置される。本実施形態では、補強材6はアルミニウム合金等の金属押し出し材から構成された、横断面が中空の長尺状体である。中空に形成することで、補強材6の強度を保ちつつ軽量化できる。なお、補強材6は押し出しに限定されず、曲げやプレスにより形成することもできる。また、合成樹脂、炭素繊維、FRPで形成することもできる。本実施形態では、地覆Wの幅方向に複数本の補強材6が配置される。具体的には地覆W上に2本の補強材6が並列される。補強材6の高さ寸法は、ベース部材3の高さ寸法と略同一とされている。このように、地覆Wの幅方向に複数本を配置できるように補強材6を構成することにより、一定幅の補強材6を用意しておけば、補強材6の位置及び並列させる数量を調整して種々の幅寸法の地覆Wに適用できるため、汎用性に優れる。図6(c)に示すように、補強材6はアンカーボルトB3により地覆Wに固定され、ねじ止め等により補強材6にカバー5が固定される。   A reinforcing member 6 is disposed between the cover 5 and the ground cover W. In this embodiment, the reinforcing member 6 is a long body having a hollow cross section made of a metal extrusion material such as an aluminum alloy. By forming it hollow, it is possible to reduce the weight while maintaining the strength of the reinforcing material 6. The reinforcing material 6 is not limited to extrusion, and can be formed by bending or pressing. It can also be formed of synthetic resin, carbon fiber, or FRP. In the present embodiment, a plurality of reinforcing members 6 are arranged in the width direction of the ground cover W. Specifically, the two reinforcing members 6 are juxtaposed on the ground cover W. The height of the reinforcing member 6 is substantially the same as the height of the base member 3. In this way, by configuring the reinforcing material 6 so that a plurality of the reinforcing materials 6 can be arranged in the width direction of the ground cover W, if the reinforcing material 6 having a certain width is prepared, the position of the reinforcing material 6 and the quantity to be arranged in parallel are determined. Since it can adjust and apply to the ground cover W of various width dimensions, it is excellent in versatility. As shown in FIG. 6C, the reinforcing member 6 is fixed to the ground cover W by anchor bolts B3, and the cover 5 is fixed to the reinforcing member 6 by screwing or the like.

カバー5を設けることにより、橋梁用防護柵の美観を向上でき、ベース部材3及びアンカーボルトB1に雨粒や車両が跳ね上げた水滴が直接かからないようにできることから腐食を抑制できる。また、もしも車両がベース部材上に乗り上げた場合であっても、車両、ベース部材3、地覆Wのそれぞれが損傷することを抑制できる。特に、本実施形態のカバー5は全体カバーであって、カバー5の上面に凹凸を生じないようにできるため、もし車両がベース部材上に乗り上げた場合であっても、車両のタイヤがベース部材3の部分で引っ掛かることが起こりにくいので、車両を速やかに道路上に戻すよう誘導させることができる。また、特にカバー5が合成樹脂等の軽量材料で形成された場合には、仮に車両の衝突、または強風や河川の増水により地覆Wからカバー5が離脱しても、歩行者や他の構造物にカバー5が当たった際に生じる危険性を低減できる。   By providing the cover 5, the beauty of the bridge guard fence can be improved, and the rain can be prevented from being directly applied to the base member 3 and the anchor bolt B <b> 1, and the corrosion can be suppressed. Moreover, even if it is a case where a vehicle runs on a base member, it can suppress that each of a vehicle, the base member 3, and the ground cover W is damaged. In particular, since the cover 5 of the present embodiment is an entire cover and can prevent the upper surface of the cover 5 from being uneven, even if the vehicle rides on the base member, the vehicle tire is used as the base member. Since it is unlikely to get caught at the portion 3, the vehicle can be promptly returned to the road. In particular, when the cover 5 is formed of a lightweight material such as a synthetic resin, even if the cover 5 is detached from the ground cover W due to a vehicle collision, strong wind, or increase in river water, a pedestrian or other structure is used. The danger which arises when the cover 5 hits an object can be reduced.

そして、カバー5と地覆Wとの間に補強材6が配置されることで、カバー5の強度を向上できる。このため、前述のように車両がベース部材上に乗り上げた場合でも、カバー5の損傷を抑制できる。   And the intensity | strength of the cover 5 can be improved by arrange | positioning the reinforcing material 6 between the cover 5 and the ground cover W. FIG. For this reason, even when the vehicle rides on the base member as described above, damage to the cover 5 can be suppressed.

次に、本実施形態の橋梁用防護柵を用いた、橋梁用防護柵の設置工法の一例である、既設橋梁用防護柵の更新工法について説明する。ただし、施工順は以下の説明順に限定されるものではなく、順序を適宜前後させることもできる。まず、地覆Wから既設橋梁用防護柵の支柱及び横梁を除去する。次に、地覆Wに埋め込まれていた既設アンカーボルトのうち、少なくとも地覆Wの上面から突出した部分を除去する。また必要により、地覆Wの表面等の補修を行う。次に、図7(a)に示すように、地覆Wに4本の新たなアンカーボルトB1を埋め込む。次に、図7(b)に示すように、支柱取付用ボルト孔321の下方から支柱取付用ボルトB2を通した状態としたベース部材3を地覆W上に位置させ、図7(c)に示すように、ベース部材3のアンカーボルト取付孔311にアンカーボルトB1を通してナットN1をねじ込む。なお、ナットN1はこの段階では仮止め状態としておく。   Next, an update method for an existing bridge protection fence, which is an example of a bridge protection fence installation method using the bridge protection fence according to the present embodiment, will be described. However, the construction order is not limited to the following description order, and the order can be appropriately changed. First, the pillars and lateral beams of the existing bridge protective fence are removed from the ground cover W. Next, among the existing anchor bolts embedded in the ground cover W, at least a portion protruding from the upper surface of the ground cover W is removed. If necessary, repair the surface of the ground cover W or the like. Next, as shown in FIG. 7A, four new anchor bolts B1 are embedded in the ground cover W. Next, as shown in FIG. 7 (b), the base member 3 that has been passed through the column mounting bolt B2 from below the column mounting bolt hole 321 is positioned on the ground cover W, and FIG. As shown, the nut N1 is screwed into the anchor bolt mounting hole 311 of the base member 3 through the anchor bolt B1. The nut N1 is temporarily fixed at this stage.

次に、図7(d)に示すように、支柱1をベース部材3の支柱取付部32上に位置させ、図7(e)に示すように、支柱1における下端プレート11のボルト貫通孔111を貫通した支柱取付用ボルトB2に対してナットN2をねじ込む。なお、ナットN2はこの段階では仮止め状態としておく。次に、図7(f)に示すように、支柱1に横梁2を取り付ける。その後、各部の位置関係を調整し、アンカーボルトB1及び支柱取付用ボルトB2にねじ込まれたナットN1,N2と、横梁2の取付用のボルト・ナットを本締めして完成する。   Next, as shown in FIG. 7 (d), the support 1 is positioned on the support attachment portion 32 of the base member 3, and as shown in FIG. 7 (e), the bolt through hole 111 of the lower end plate 11 in the support 1. The nut N2 is screwed into the column mounting bolt B2 penetrating through the nut N2. The nut N2 is temporarily set at this stage. Next, as shown in FIG. 7 (f), the cross beam 2 is attached to the column 1. Thereafter, the positional relationship of each part is adjusted, and the nuts N1 and N2 screwed into the anchor bolt B1 and the column mounting bolt B2 and the bolts and nuts for mounting the horizontal beam 2 are finally tightened to complete.

以上、本実施形態では、ベース部材3が地覆Wを後方(橋梁幅方向外側方向)に延長するアタッチメントである「地覆延長部材」として作用する。このため、幅の狭い地覆Wであっても、地覆Wの延長方向に向かって2列以上となるように配置される複数(本実施形態では4本)のアンカーボルトB1で支柱1を支持できる。しかも建築限界も確保できる。このため、強度を確保しつつ安全性が高い。また、地覆Wを再構築する必要がない。また、地覆W上だけで既設橋梁用防護柵の更新工法の作業を完結できる(橋梁上だけで施工可能である)ため、河川上である橋梁の後方(外方)に仮設足場を設置する必要がなく、工期の短縮及び工事施工コストの低減が可能である。また、更新工法を実施するための各部材を、作業員が人力で持ち運ぶことのできるように構成できるため、重機を使う必要がなく、工事施工コストを低減できる。   As described above, in the present embodiment, the base member 3 acts as a “ground cover extending member” which is an attachment that extends the ground cover W rearward (outward in the bridge width direction). For this reason, even if it is the narrow ground cover W, the support | pillar 1 is attached with the anchor bolt B1 arrange | positioned so that it may become 2 or more rows toward the extension direction of the ground cover W (four in this embodiment). I can support it. Moreover, building limits can be secured. For this reason, safety is high while ensuring strength. Moreover, there is no need to reconstruct the ground cover W. In addition, since the work of renewal of the existing fence guard can be completed only on the ground cover W (it can be constructed only on the bridge), a temporary scaffold is installed behind (outside) the bridge on the river. There is no need, and the construction period can be shortened and the construction cost can be reduced. Moreover, since each member for carrying out the renewal construction method can be configured so that the worker can carry it by manpower, it is not necessary to use heavy machinery and construction costs can be reduced.

なお、本実施形態の工法は、ここまで説明してきた既設橋梁用防護柵の更新だけに限定されず、例えば橋梁用防護柵の設けられていなかった地覆Wに対し、新たに橋梁用防護柵を設ける際に適用することもできる。更には、新設した地覆Wに対してこの工法を適用することもできる。   In addition, the construction method of this embodiment is not limited only to the update of the existing bridge protection fence described so far. For example, a new bridge protection fence is provided for the ground cover W in which the bridge protection fence is not provided. It can also be applied when providing. Furthermore, this construction method can also be applied to the newly formed ground cover W.

以上、本発明の実施形態について説明したが、本発明は前記の各実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々の変更を加えることができる。   As mentioned above, although embodiment of this invention was described, this invention is not limited to each said embodiment, A various change can be added in the range which does not deviate from the summary of this invention.

1 支柱
2 横梁
3 ベース部材
3a ベース部材の底面
3b ベース部材の上面
311 アンカーボルト取付孔
312 凹部
321 支柱取付用ボルト孔
4 蓋部材
5 カバー
B1 アンカーボルト
B2 支柱を固定するためのボルト、固定部材、支柱取付用ボルト
W 地覆
W1 地覆の橋梁幅方向における外面
S 空間
DB1 アンカーボルトの埋め込み深さ
W311b アンカーボルト取付孔の配置の間隔、橋梁幅方向の外側の列におけるアンカーボルト取付孔の孔間隔
W311f アンカーボルト取付孔の配置の間隔、橋梁幅方向の内側の列におけるアンカーボルト取付孔の孔間隔
DESCRIPTION OF SYMBOLS 1 Support | pillar 2 Horizontal beam 3 Base member 3a Bottom surface of base member 3b Upper surface of base member 311 Anchor bolt mounting hole 312 Recess 321 Support bolt mounting bolt hole 4 Cover member 5 Cover B1 Anchor bolt B2 Bolt for fixing the support, fixing member, Strut mounting bolt W Ground cover W1 Outer surface in the width direction of the bridge S space DB1 Depth of anchor bolt embedding W311b Spacing distance of anchor bolt mounting holes, spacing of anchor bolt mounting holes in the outer rows in the bridge width direction W311f Anchor bolt mounting hole spacing, anchor bolt mounting hole spacing in the inner row in the bridge width direction

Claims (7)

道路用橋梁における地覆上面に取り付けられ、地覆の延長方向に向かって2列以上となるように配置される複数のアンカーボルトと、
地覆から橋梁幅方向外側に張り出すように、前記複数のアンカーボルトによって固定されるベース部材と、
前記ベース部材上に固定される支柱と、
前記支柱に取り付けられる横梁と、を備え、
前記ベース部材は、前記複数のアンカーボルトの各々が貫通する複数のアンカーボルト取付孔を備え、
前記複数のアンカーボルト取付孔は、地覆の延長方向における配置の間隔につき、前記複数のアンカーボルトの地覆への埋め込み深さを基準とした比率で0.5〜3.0となる間隔で配置された橋梁用防護柵の設置構造。
A plurality of anchor bolts attached to the upper surface of the ground cover in the road bridge and arranged in two or more rows in the extending direction of the ground surface;
A base member fixed by the plurality of anchor bolts so as to project outward from the ground cover in the bridge width direction;
A column fixed on the base member;
A transverse beam attached to the column,
The base member includes a plurality of anchor bolt mounting holes through which each of the plurality of anchor bolts passes,
The plurality of anchor bolt mounting holes are spaced at intervals of 0.5 to 3.0 with respect to the arrangement interval in the extending direction of the ground cover, with a ratio based on the embedding depth of the plurality of anchor bolts in the ground cover. The installation structure of the guard fence for the arranged bridge.
道路用橋梁における地覆上面に取り付けられ、地覆の延長方向に向かって2列以上となるように配置される複数のアンカーボルトと、
地覆から橋梁幅方向外側に張り出すように、前記複数のアンカーボルトによって固定されるベース部材と、
前記ベース部材上に固定される支柱と、
前記支柱に取り付けられる横梁と、を備え、
前記ベース部材は、前記複数のアンカーボルトの各々が貫通する複数のアンカーボルト取付孔を備え、
前記複数のアンカーボルト取付孔は、橋梁幅方向の外側の列における孔間隔よりも内側の列における孔間隔が大きい橋梁用防護柵の設置構造。
A plurality of anchor bolts attached to the upper surface of the ground cover in the road bridge and arranged in two or more rows in the extending direction of the ground surface;
A base member fixed by the plurality of anchor bolts so as to project outward from the ground cover in the bridge width direction;
A column fixed on the base member;
A transverse beam attached to the column,
The base member includes a plurality of anchor bolt mounting holes through which each of the plurality of anchor bolts passes,
The plurality of anchor bolt mounting holes have a bridge guard fence installation structure in which the hole interval in the inner row is larger than the hole interval in the outer row in the bridge width direction.
前記ベース部材の、地覆に対する前記橋梁幅方向外側への張り出しは、前記ベース部材の底面と地覆の橋梁幅方向における外面との間に空間を有するようになされる、請求項1または2に記載の橋梁用防護柵の設置構造。   The overhang of the base member to the outside in the bridge width direction with respect to the ground cover is made to have a space between the bottom surface of the base member and the outer surface in the bridge width direction of the ground cover. Installation structure of the guard fence for the described bridge. 前記支柱は、前記ベース部材に対してボルトにより固定され、
前記ベース部材は、前記支柱を固定するためのボルトの下方延長方向に、前記ボルトに当接可能であって、前記空間に面する蓋部材を備える、請求項3に記載の橋梁用防護柵の設置構造。
The column is fixed to the base member with a bolt,
The bridge guard fence according to claim 3, wherein the base member includes a lid member that can contact the bolt in a downward extending direction of the bolt for fixing the support and faces the space. Installation structure.
道路用橋梁における地覆上面に取り付けられ、地覆の延長方向に向かって2列以上となるように配置される複数のアンカーボルトの各々が貫通する複数のアンカーボルト取付孔と、
橋梁用防護柵の支柱を取り付ける支柱取付用ボルト孔と、を備え、
地覆に対して固定された場合に、地覆の橋梁幅方向における外面よりも一端が外方に位置し、
前記複数のアンカーボルト取付孔は、地覆の延長方向における配置の間隔につき、前記複数のアンカーボルトの地覆への埋め込み深さを基準とした比率で0.5〜3.0となる間隔で配置された橋梁用防護柵用のベース部材。
A plurality of anchor bolt mounting holes through which each of a plurality of anchor bolts that are attached to the top surface of the road bridge and are arranged in two or more rows in the extending direction of the ground cover;
A post mounting bolt hole for mounting a bridge guard fence post,
When fixed to the ground cover, one end is located outside the outer surface in the bridge width direction of the ground cover,
The plurality of anchor bolt mounting holes are spaced at intervals of 0.5 to 3.0 with respect to the arrangement interval in the extending direction of the ground cover, with a ratio based on the embedding depth of the plurality of anchor bolts in the ground cover. Base member for the guard fence for the arranged bridge.
道路用橋梁における地覆上面に取り付けられ、地覆の延長方向に向かって2列以上となるように配置される複数のアンカーボルトの各々が貫通する複数のアンカーボルト取付孔と、
橋梁用防護柵の支柱を取り付ける支柱取付用ボルト孔と、を備え、
地覆に対して固定された場合に、地覆の橋梁幅方向における外面よりも一端が外方に位置し、
前記複数のアンカーボルト取付孔は、橋梁幅方向の外側の列における孔間隔よりも内側の列における孔間隔が大きい橋梁用防護柵用のベース部材。
A plurality of anchor bolt mounting holes through which each of a plurality of anchor bolts that are attached to the top surface of the road bridge and are arranged in two or more rows in the extending direction of the ground cover;
A post mounting bolt hole for mounting a bridge guard fence post,
When fixed to the ground cover, one end is located outside the outer surface in the bridge width direction of the ground cover,
The plurality of anchor bolt mounting holes are base members for a guard fence for a bridge in which the hole interval in the inner row is larger than the hole interval in the outer row in the bridge width direction.
地覆に複数のアンカーボルトを埋め込む工程と、
地覆上に、請求項5または6に記載のベース部材を配置し、前記アンカーボルトにナットをねじ込むことにより、地覆に対して前記ベース部材を固定する工程と、
前記ベース部材上に支柱を載せ、前記支柱取付用ボルト孔に取り付けられた状態とされたボルトにナットをねじ込むことで、前記支柱を前記ベース部材に取り付ける工程と、
前記支柱に横梁を取り付ける工程と、を有する橋梁用防護柵の設置工法。
Embedding a plurality of anchor bolts in the ground cover;
A step of placing the base member according to claim 5 or 6 on the ground cover, and fixing the base member to the ground cover by screwing a nut into the anchor bolt;
A step of mounting the column to the base member by placing a column on the base member and screwing a nut into the bolt attached to the column mounting bolt hole;
A method of installing a guard fence for a bridge, comprising attaching a horizontal beam to the support column.
JP2016090835A 2016-04-28 2016-04-28 Installation structure of protective fence for bridge, installation method of protective fence for bridge Active JP6691808B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2016090835A JP6691808B2 (en) 2016-04-28 2016-04-28 Installation structure of protective fence for bridge, installation method of protective fence for bridge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2016090835A JP6691808B2 (en) 2016-04-28 2016-04-28 Installation structure of protective fence for bridge, installation method of protective fence for bridge

Publications (2)

Publication Number Publication Date
JP2017198008A true JP2017198008A (en) 2017-11-02
JP6691808B2 JP6691808B2 (en) 2020-05-13

Family

ID=60237490

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2016090835A Active JP6691808B2 (en) 2016-04-28 2016-04-28 Installation structure of protective fence for bridge, installation method of protective fence for bridge

Country Status (1)

Country Link
JP (1) JP6691808B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220145523A (en) * 2021-04-22 2022-10-31 시스템코리아 주식회사 The rotating cylinder system for suicide prevention with enhanced structural performance

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220145523A (en) * 2021-04-22 2022-10-31 시스템코리아 주식회사 The rotating cylinder system for suicide prevention with enhanced structural performance
KR102477828B1 (en) * 2021-04-22 2022-12-15 시스템코리아 주식회사 The rotating cylinder system for suicide prevention with enhanced structural performance

Also Published As

Publication number Publication date
JP6691808B2 (en) 2020-05-13

Similar Documents

Publication Publication Date Title
KR102168358B1 (en) Landfill facility for bridge inspection structure and construction method
GB2490118A (en) Bollard assembly for preventing vehicular access
JP4310444B1 (en) Width expansion material for road bridges
KR101604640B1 (en) Footbridges footbridges installed by the installation method and installation method
JP6410553B2 (en) Installation structure of guard fence for bridge, base member for guard fence for bridge, installation method of guard fence for bridge
JP5023404B1 (en) Method for reinforcing corroded part of steel pipe support
JP6691808B2 (en) Installation structure of protective fence for bridge, installation method of protective fence for bridge
JP6068243B2 (en) Expansion joint for road
JP6652461B2 (en) Bridge fence
JP5043879B2 (en) How to install width expansion materials for road bridges
JP5519966B2 (en) Protective fence
JP5334880B2 (en) Protective fence
JP6733933B2 (en) Vehicle restraint structure for bridge landslide
JP2015045162A (en) Guard fence
KR100680819B1 (en) Guardrail structure of road
KR100797863B1 (en) Roadside safety barrier
JP6652462B2 (en) Bridge fence
JP5334883B2 (en) Protective fence
KR101073874B1 (en) Installing structure of floor beam
JP5688039B2 (en) Partition structure
WO2017143381A1 (en) System and method of reinforcing an in-ground utility pole
JP5829901B2 (en) Guard fence support and support for bridge
JP3708080B2 (en) Guard fence integrated fence
JP5519967B2 (en) Protective fence
JP5851315B2 (en) Scaffolding bracket and its mounting method

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20190123

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20191018

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20191018

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20191217

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20200327

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20200413

R150 Certificate of patent or registration of utility model

Ref document number: 6691808

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250