JP2016084641A - Overhanging sidewalk block - Google Patents

Overhanging sidewalk block Download PDF

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JP2016084641A
JP2016084641A JP2014218793A JP2014218793A JP2016084641A JP 2016084641 A JP2016084641 A JP 2016084641A JP 2014218793 A JP2014218793 A JP 2014218793A JP 2014218793 A JP2014218793 A JP 2014218793A JP 2016084641 A JP2016084641 A JP 2016084641A
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overhanging
sidewalk block
plate
road
block
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JP6373163B2 (en
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剛史 亀山
Takeshi Kameyama
剛史 亀山
恭平 細川
Kyohei Hosokawa
恭平 細川
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Nihon Kogyo KK
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract

PROBLEM TO BE SOLVED: To provide an overhanging sidewalk block that does not require widening of an excavated width of an existing road at a time of construction, and mitigates a bias in loads exerted on a substructure.SOLUTION: An overhanging sidewalk block includes: a main body block 10 comprising an anchoring deck slab 11, a side wall plate 12 erected on a top surface of an outer edge of the anchoring deck slab 11, and an overhanging floor slab 13 joined on an outer surface at a top edge of the side wall plate 12; and a rear surface plate 20 inclined toward a road side from an inner edge part of the anchoring deck slab 11, the rear surface plate allowing an angle of inclination to be adjusted. Since a load of a backfill material is exerted not only on the anchoring deck slab 11 but also on the rear surface plate 20 inclined toward the road side, a center of gravity of an overhanging sidewalk block A shifts toward the road side, thereby mitigating a bias in loads exerted on a substructure. The rear surface plate 20 only needs to be inclined to suit an inclination of excavation at a time of construction, thereby eliminating a need to widen an excavated width of an existing road due to the rear surface plate 20 installed.SELECTED DRAWING: Figure 1

Description

本発明は、張出歩道ブロックに関する。さらに詳しくは、張出歩道を構築するための張出歩道ブロックに関する。   The present invention relates to an overhanging sidewalk block. More specifically, the present invention relates to an extended sidewalk block for constructing an extended sidewalk.

河川や崖等に隣接する既存の道路を拡張して歩道を構築する場合に、空中に張り出した歩道を、張出歩道ブロックを用いて構築することが行われる。張出歩道ブロックは、定着底版と、定着底版の外縁上面に立設された側壁版と、側壁版の上端外面に連接された張出床版とからなるプレキャストコンクリートブロックである。既設道路の縁部を掘削して、掘削部の底に基礎コンクリートを形成した後に、基礎コンクリート上に張出歩道ブロックを設置して、定着底版の上部空間を埋め戻すことで張出歩道が構築される。   When a sidewalk is constructed by extending an existing road adjacent to a river, a cliff, or the like, a sidewalk projecting in the air is constructed using a projecting sidewalk block. The overhanging sidewalk block is a precast concrete block including a fixing bottom plate, a side wall plate standing on the upper surface of the outer edge of the fixing bottom plate, and an overhanging floor plate connected to the upper outer surface of the side wall plate. After digging the edge of the existing road and forming the foundation concrete at the bottom of the excavation part, install the overhanging block on the foundation concrete and refill the upper space of the anchored bottom plate to build the overhanging sidewalk Is done.

一般に、張出歩道が構築される既設道路の下部には擁壁や石積み等の下部構造物が存在する。下部構造物には、張出歩道ブロックの自重や、裏込め材、張出歩道ブロック上を通行する車両や人等の荷重がかかる。張出歩道ブロックは張出床版が下部構造物から張り出した状態で設けられるため、下部構造物にかかる荷重は歩道側に偏っており、定着底版の外縁部からは下部構造物に大きな荷重がかかる。しかし、既設の下部構造物は、張出歩道ブロックを支持すること想定して構築されていないため、荷重が大きすぎると不安定になるという問題がある。   In general, there are substructures such as retaining walls and masonry at the bottom of the existing road where the overhanging trail is constructed. The substructure is subjected to the weight of the overhanging sidewalk block, the backfill material, and the load of vehicles and people passing through the overhanging sidewalk block. Since the overhanging sidewalk block is provided with the overhanging floor plate protruding from the lower structure, the load applied to the lower structure is biased toward the sidewalk, and a large load is applied to the lower structure from the outer edge of the anchored bottom plate. Take it. However, since the existing substructure is not constructed on the assumption that the overhanging sidewalk block is supported, there is a problem that it becomes unstable if the load is too large.

特許文献１には、基礎コンクリートの幅を定着底版の幅よりも広く設定することで、基礎コンクリートの拡幅部分の自重と拡幅部分上の埋め戻し土砂の重量を、張出歩道ブロックの転倒を阻止する抵抗要素として安定化計算に加算できることが開示されている。   In Patent Document 1, by setting the width of the foundation concrete wider than the width of the fixed bottom plate, the weight of the widened portion of the foundation concrete and the weight of the backfill earth and sand on the widened portion are prevented from falling over the overhanging sidewalk block. It is disclosed that the resistance element can be added to the stabilization calculation.

しかし、幅広の基礎コンクリートを形成するためには、既設道路の掘削幅を広くする必要があり、二車線道路の両方の車線が塞がれるなど、施工時に既設道路を通行できなくなるという問題がある。なお、土壌を掘削する際には、土砂が崩れることなく自立する安息角（例えば３０°〜４０°）に合わせて掘削する必要がある。そのため、既設道路の掘削幅は基礎コンクリートの幅よりも広くなる。   However, in order to form wide foundation concrete, it is necessary to widen the excavation width of the existing road, and there is a problem that it becomes impossible to pass the existing road at the time of construction, such as blocking both lanes of the two-lane road . In addition, when excavating soil, it is necessary to excavate according to an angle of repose (for example, 30 ° to 40 °) where the soil does not collapse. Therefore, the excavation width of the existing road is wider than that of the foundation concrete.

特開２００５−１９４７２２号公報JP 2005-194722 A

本発明は上記事情に鑑み、施工時に既設道路の掘削幅を広くする必要がなく、しかも下部構造物にかかる荷重の偏りを低減できる張出歩道ブロックを提供することを目的とする。   In view of the above circumstances, an object of the present invention is to provide an overhanging sidewalk block that does not need to widen the excavation width of an existing road during construction and that can reduce the load bias applied to the lower structure.

第１発明の張出歩道ブロックは、定着底版と、該定着底版の外縁上面に立設された側壁版と、該側壁版の上端外面に連接された張出床版とからなる本体ブロックと、前記定着底版の内縁部から道路側に傾斜し、傾斜角度を調整可能に設けられた背面板と、を備えることを特徴とする。
第２発明の張出歩道ブロックは、第１発明において、前記背面板を任意の傾斜角度で前記本体ブロックに固定する角度調整部材を備えることを特徴とする。
第３発明の張出歩道ブロックは、第１または第２発明において、前記背面板は網であることを特徴とする。
第４発明の張出歩道ブロックは、第１または第２発明において、前記背面板はコンクリートパネルであることを特徴とする。 The overhanging sidewalk block of the first invention comprises a main body block comprising a fixed bottom plate, a side wall plate standing on the upper surface of the outer edge of the fixed bottom plate, and a overhanging floor plate connected to the upper outer surface of the side wall plate, And a back plate that is inclined from the inner edge of the fixing bottom plate to the road side and is capable of adjusting the inclination angle.
The overhanging sidewalk block according to a second aspect of the invention is characterized in that in the first aspect of the invention, an angle adjusting member for fixing the back plate to the main body block at an arbitrary inclination angle is provided.
The overhanging sidewalk block of the third invention is characterized in that, in the first or second invention, the back plate is a net.
According to a fourth aspect of the present invention, in the first or second aspect, the back plate is a concrete panel.

第１発明によれば、定着底版に加えて道路側に傾斜した背面板にも裏込め材の荷重がかかるので、張出歩道ブロックの重心が道路側に移動し、下部構造物にかかる荷重の偏りを低減できる。また、施工時には、背面板を掘削勾配に合わせて傾斜させればよく、背面板を設けることにより既設道路の掘削幅を広くする必要がない。
第２発明によれば、背面板の傾斜角度を調整することで、張出歩道ブロックの重心を最適な位置に移動させることができる。
第３発明によれば、背面板が網であるので、施工時の取り扱いが容易である。
第４発明によれば、背面板がコンクリートパネルであるので、背面板の自重によっても張出歩道ブロックの重心を道路側に移動させることができる。 According to the first invention, in addition to the fixing bottom plate, the back plate inclined to the road side is also loaded with the backfill material, so that the center of gravity of the overhanging sidewalk block moves to the road side and the load on the lower structure is reduced. The bias can be reduced. Further, at the time of construction, the back plate may be inclined according to the excavation gradient, and it is not necessary to widen the excavation width of the existing road by providing the back plate.
According to the second invention, the center of gravity of the overhanging sidewalk block can be moved to the optimum position by adjusting the inclination angle of the back plate.
According to the third invention, since the back plate is a net, handling during construction is easy.
According to the fourth invention, since the back plate is a concrete panel, the center of gravity of the overhanging sidewalk block can be moved to the road side by the weight of the back plate.

本発明の第１実施形態に係る張出歩道ブロックＡの側面図である。It is a side view of the overhanging sidewalk block A which concerns on 1st Embodiment of this invention. 同張出歩道ブロックＡの平面図である。It is a top view of the overhanging sidewalk block A. 張出歩道ブロックＡの施工手順（１）（２）の説明図である。It is explanatory drawing of the construction procedure (1) (2) of the overhanging sidewalk block A. 張出歩道ブロックＡの施工手順（３）（４）の説明図である。It is explanatory drawing of the construction procedure (3) of a overhanging sidewalk block A (4). 張出歩道ブロックＡの下部構造物にかかる荷重の説明図であって、（Ａ）図は金網２０を設けない場合、（Ｂ）図は金網２０を設けた場合である。It is explanatory drawing of the load concerning the lower structure of the overhanging sidewalk block A, Comprising: (A) A figure shows the case where the metal mesh 20 is not provided, (B) The figure is the case where the metal mesh 20 is provided. 本発明の第２実施形態に係る張出歩道ブロックＢの側面図である。It is a side view of the overhanging sidewalk block B which concerns on 2nd Embodiment of this invention.

つぎに、本発明の実施形態を図面に基づき説明する。
〔第１実施形態〕
（張出歩道ブロックＡ）
まず、本発明の第１実施形態に係る張出歩道ブロックＡの構造を説明する。
図１および図２に示すように、張出歩道ブロックＡは、主に本体ブロック１０と、背面板２０と、角度調整部材３０とを備えている。 Next, an embodiment of the present invention will be described with reference to the drawings.
[First Embodiment]
(Overhang sidewalk block A)
First, the structure of the overhanging sidewalk block A according to the first embodiment of the present invention will be described.
As shown in FIGS. 1 and 2, the overhanging sidewalk block A mainly includes a main body block 10, a back plate 20, and an angle adjusting member 30.

本体ブロック１０は、平面視略方形の定着底版１１と、定着底版１１の外縁上面に立設された側壁版１２と、側壁版１２の上端外面に連接された張出床版１３とからなるプレキャストコンクリートブロックである。使用時には定着底版１１の上部に道路が構築され、張出床版１３が歩道となる。そのため、本体ブロック１０の定着底版１１側（図１における左側）を道路側と称し、張出床版１３側（図１における右側）を歩道側と称する。また、定着底版１１の道路側の縁は道路の内側に向けられるため内縁と称し、定着底版１１の歩道側の縁は道路の外側に向けられるため外縁と称する。同様に、張出床版１３の道路側の縁を内縁と称し、歩道側の縁を外縁と称する。   The main body block 10 is a precast comprising a fixed bottom plate 11 having a substantially square shape in plan view, a side wall plate 12 erected on the upper surface of the outer edge of the fixed bottom plate 11, and an overhanging floor plate 13 connected to the upper outer surface of the side wall plate 12. It is a concrete block. At the time of use, a road is constructed on the upper part of the fixing bottom plate 11 and the overhanging floor plate 13 becomes a sidewalk. Therefore, the fixing bottom slab 11 side (the left side in FIG. 1) of the main body block 10 is referred to as the road side, and the overhanging slab 13 side (the right side in FIG. 1) is referred to as the sidewalk side. Further, the edge on the road side of the fixing bottom slab 11 is referred to as an inner edge because it is directed to the inside of the road, and the edge on the sidewalk side of the fixing bottom slab 11 is referred to as an outer edge because it is directed to the outside of the road. Similarly, the road side edge of the overhanging slab 13 is referred to as an inner edge, and the sidewalk side edge is referred to as an outer edge.

定着底版１１の内縁部には隆起部１４が形成されており、隆起部１４と側壁版１２との間には２条のリブ１５が形成されている。リブ１５の頂部には、鉄筋４２が配置される溝１６が形成されている。定着底版１１の略中央部には表裏に貫通した孔１７が形成されている。また、張出床版１３の外縁部には隆起部１８が形成されており、隆起部１８の略中央部には転倒防止柵の支柱が挿入される取付孔１９が形成されている。   A raised portion 14 is formed at the inner edge of the fixing bottom plate 11, and two ribs 15 are formed between the raised portion 14 and the side wall plate 12. A groove 16 in which the reinforcing bar 42 is disposed is formed at the top of the rib 15. A hole 17 penetrating the front and back is formed in a substantially central portion of the fixing bottom plate 11. Further, a raised portion 18 is formed at the outer edge portion of the overhanging floor slab 13, and a mounting hole 19 into which a column of a fall prevention fence is inserted is formed at a substantially central portion of the raised portion 18.

背面板２０は定着底版１１と略同一幅寸法の金網である。金網２０はその下部が隆起部１４の背面に沿って設けられ、ボルト等で固定されている。また、金網２０は隆起部１４の上端において折り曲げられており、その上部は隆起部１４から道路側に傾斜している。金網２０の折り曲げ角度を調整することにより、金網２０の上部の傾斜角度が調整可能となっている。背面板２０として金網を採用することにより、施工時の取り扱いが容易となる。なお、金網２０の幅寸法を長尺とし、並んで設けられる複数の本体ブロック１０で共通の部材としてもよい。また、金網２０に代えて、樹脂網などある程度剛性を有する網を用いてもよい。   The back plate 20 is a wire mesh having substantially the same width as the fixing bottom plate 11. The lower part of the metal mesh 20 is provided along the back surface of the raised part 14, and is fixed with a bolt or the like. Further, the wire mesh 20 is bent at the upper end of the raised portion 14, and the upper portion thereof is inclined from the raised portion 14 to the road side. By adjusting the bending angle of the wire mesh 20, the inclination angle of the upper portion of the wire mesh 20 can be adjusted. By adopting a wire mesh as the back plate 20, handling during construction becomes easy. In addition, it is good also considering the width dimension of the metal-mesh 20 as long, and making it a common member with the several main body block 10 provided along with it. Further, instead of the metal net 20, a net having some rigidity such as a resin net may be used.

金網２０の上部とリブ１５の頂部に固定された鉄筋４２とは、角度調整部材３０で連結されている。角度調整部材３０により、金網２０を任意の傾斜角度で本体ブロック１０に固定している。角度調整部材３０としては上記機能を有すれば特に限定されないが、鋼製の線材やターンバックル、チェーン等が用いられる。角度調整部材３０として線材やターンバックル、チェーンを用いる場合には、これらの長さを調整することで金網２０の傾斜角度を調整できる。また、角度調整部材３０と金網２０および本体ブロック１０との連結箇所は特に限定されず、角度調整部材３０と定着底版１１とを連結する構成のほか、角度調整部材３０と側壁版１２とを連結する構成としてもよい。   The upper part of the wire mesh 20 and the reinforcing bar 42 fixed to the top of the rib 15 are connected by an angle adjusting member 30. The wire mesh 20 is fixed to the main body block 10 at an arbitrary inclination angle by the angle adjusting member 30. The angle adjusting member 30 is not particularly limited as long as it has the above function, but a steel wire, turnbuckle, chain, or the like is used. When a wire rod, turnbuckle, or chain is used as the angle adjustment member 30, the inclination angle of the wire mesh 20 can be adjusted by adjusting the lengths thereof. Moreover, the connection location of the angle adjustment member 30 and the metal mesh 20 and the main body block 10 is not particularly limited, and the angle adjustment member 30 and the side wall plate 12 are connected in addition to the configuration in which the angle adjustment member 30 and the fixing bottom plate 11 are connected. It is good also as composition to do.

（施工方法）
つぎに、張出歩道ブロックＡの施工方法を説明する。
図３（１）に示すように、張出歩道ブロックＡを施工する前の既設道路は、土壌の表面にアスファルト舗装５１を施すことにより構築されている。また、河川や崖等に面する法面には擁壁５２や石積みが構築されている。 (Construction method)
Below, the construction method of the overhanging sidewalk block A is demonstrated.
As shown in FIG. 3 (1), the existing road before constructing the overhanging sidewalk block A is constructed by applying asphalt pavement 51 to the soil surface. Retaining walls 52 and masonry are constructed on slopes facing rivers and cliffs.

まず、図３（２）に示すように、既設道路の縁部を一段低く掘削するとともに、擁壁５２の上部を掘削部に合わせて除去する。土壌を掘削する際には、土砂が崩れることなく自立する安息角（例えば３０°〜４０°）に合わせて掘削する必要がある。そのため、掘削部の道路側は、後に造成される基礎コンクリート５４の内縁を起点とする傾斜面となる。なお、施工性のため、掘削部の傾斜面と基礎コンクリート５４の内縁とは少し離す場合もある。   First, as shown in FIG. 3 (2), the edge of the existing road is excavated one step lower, and the upper part of the retaining wall 52 is removed in accordance with the excavation part. When excavating the soil, it is necessary to excavate in accordance with an angle of repose (for example, 30 ° to 40 °) where the earth and sand does not collapse. Therefore, the road side of the excavation part becomes an inclined surface starting from the inner edge of the foundation concrete 54 to be formed later. In addition, for workability, the inclined surface of the excavation part and the inner edge of the foundation concrete 54 may be slightly separated.

つぎに、掘削部の底に基礎砕石５３を敷き均し、十分転圧して不陸のないように所定の厚さに仕上げる。つぎに、基礎砕石層５３の上面にコンクリートを打設し、基礎コンクリート５４を形成する。この際、基礎コンクリート５４に差し筋用の鉄筋４１を埋め込む。鉄筋４１は、本体ブロック１０を据付けたときに、定着底版１１の孔１７に通る位置に配置される。基礎コンクリート５４の養生硬化後、基礎コンクリート５４の上面に敷モルタル５５を施す。   Next, the ground crushed stone 53 is spread on the bottom of the excavation part, and it is rolled to a predetermined thickness so as not to be uneven. Next, concrete is cast on the upper surface of the foundation crushed stone layer 53 to form the foundation concrete 54. At this time, the reinforcing bar 41 for reinforcing bars is embedded in the basic concrete 54. The reinforcing bar 41 is disposed at a position that passes through the hole 17 of the fixing bottom plate 11 when the main body block 10 is installed. After curing and curing the foundation concrete 54, a mortar 55 is applied to the upper surface of the foundation concrete 54.

つぎに、図４（３）に示すように、クレーン等を用いて本体ブロック１０を敷モルタル５５の上に据え付ける。この際、本体ブロック１０は、定着底版１１を道路側とし、張出床版１３を空中に張り出した状態とされる。また、定着底版１１は、孔１７に鉄筋４１が挿入されるように位置決めされる。同様に、複数の本体ブロック１０が道路の縁に沿って並べられる。   Next, as shown in FIG. 4 (3), the main body block 10 is installed on the mortar 55 using a crane or the like. At this time, the main body block 10 is in a state where the fixing bottom plate 11 is on the road side and the overhanging floor plate 13 is overhanging in the air. Further, the fixing bottom plate 11 is positioned so that the reinforcing bar 41 is inserted into the hole 17. Similarly, the plurality of main body blocks 10 are arranged along the edge of the road.

つぎに、溝１６に鉄筋４２を配置する。鉄筋４２は隣り合う本体ブロック１０に掛け渡される。つぎに、本体ブロック１０に金網２０をボルト等で固定するとともに、金網２０の上部を道路側に傾斜させる。そして、金網２０の上部と鉄筋４２とを角度調整部材３０で連結し、金網２０の傾斜角度を所望の角度で固定する。   Next, the reinforcing bar 42 is disposed in the groove 16. The reinforcing bars 42 are stretched between adjacent main body blocks 10. Next, while fixing the metal mesh 20 to the main body block 10 with a bolt etc., the upper part of the metal mesh 20 is inclined to the road side. And the upper part of the metal mesh 20 and the reinforcing bar 42 are connected by the angle adjusting member 30, and the inclination angle of the metal mesh 20 is fixed at a desired angle.

ここで、掘削部の道路側は傾斜面となっており、その分空間があるため、金網２０を道路側に傾斜させたとしても追加で土壌を掘削する必要がない。しかも、この掘削部は必要最小限の幅の基礎コンクリート５４を形成するために必要な規模であり、既設道路の掘削幅も最小限となっている。このように、金網２０を掘削勾配に合わせて傾斜させればよく、金網２０を設けることにより既設道路の掘削幅を広くする必要がない。そのため、例えば二車線道路の場合、一車線を工事用に閉塞し、残りの車線を通行に使用することができる。   Here, since the road side of the excavation part is an inclined surface and there is a corresponding space, even if the wire mesh 20 is inclined to the road side, it is not necessary to excavate additional soil. Moreover, this excavation part is a scale necessary for forming the foundation concrete 54 having the minimum necessary width, and the excavation width of the existing road is also minimized. In this way, the wire mesh 20 may be inclined according to the excavation gradient, and it is not necessary to widen the excavation width of the existing road by providing the wire mesh 20. Therefore, for example, in the case of a two-lane road, one lane can be blocked for construction, and the remaining lane can be used for traffic.

つぎに、図４（４）に示すように、定着底版１１上に鉄筋４１、４２が埋め込まれる厚さまでコンクリート５６を打設し、養生硬化する。鉄筋４１により定着底版１１が基礎コンクリート５４に固定され、鉄筋４２により隣り合う本体ブロック１０同士が連結される。   Next, as shown in FIG. 4 (4), concrete 56 is placed on the fixing bottom slab 11 to a thickness where the reinforcing bars 41 and 42 are embedded, and cured and cured. The fixing bottom plate 11 is fixed to the basic concrete 54 by the reinforcing bars 41, and the adjacent main body blocks 10 are connected by the reinforcing bars 42.

つぎに、掘削部を土砂等の裏込め材５７で埋め戻す。裏込め材層５７の上面には、常法にしたがってアスファルト舗装５１が施される。また、必要に応じて、転倒防止柵の支柱を取付孔１９に固定して、転倒防止柵を取り付ける。なお、必要に応じて、定着底版１１上部の埋め戻し空間に側溝を設置してもよいし、ガードレールや縁石を設置してもよい。   Next, the excavation part is backfilled with backfill material 57 such as earth and sand. Asphalt pavement 51 is applied to the upper surface of the backfill material layer 57 according to a conventional method. Further, if necessary, the fall prevention fence is fixed to the attachment hole 19 and the fall prevention fence is attached. If necessary, a side groove may be installed in the backfill space above the fixing bottom plate 11, or a guardrail or curb may be installed.

（下部構造物にかかる荷重）
つぎに、張出歩道ブロックＡの下部構造物にかかる荷重を説明する。
図５（Ａ）に示すように、本体ブロック１０に金網２０を設けない場合は、本体ブロック１０は張出床版１３が擁壁５２等の下部構造物から張り出した状態で設けられるため、重心が歩道側に寄っている。そのため、下部構造物にかかる荷重は歩道側に偏っており、定着底版１１の外縁部から下部構造物かかる荷重ｑ１が大きくなる。既設の下部構造物は、張出歩道ブロックＡを支持すること想定して構築されていないため、荷重ｑ１が大きすぎると不安定になる。 (Load applied to the substructure)
Next, a load applied to the lower structure of the overhanging sidewalk block A will be described.
As shown in FIG. 5A, when the metal block 20 is not provided in the main body block 10, the main body block 10 is provided in a state in which the overhanging floor slab 13 protrudes from the lower structure such as the retaining wall 52. Is close to the sidewalk. Therefore, the load applied to the lower structure is biased toward the sidewalk, and the load q1 applied to the lower structure from the outer edge portion of the fixing bottom plate 11 increases. Since the existing substructure is not constructed assuming that the overhanging sidewalk block A is supported, it becomes unstable if the load q1 is too large.

これに対して、図５（Ｂ）に示すように、本体ブロック１０に金網２０を設けると、定着底版１１に加えて道路側に傾斜した金網２０にも裏込め材５７の荷重がかかるので、重心が道路側に移動する。そのため、下部構造物にかかる荷重の偏りを低減でき、定着底版１１の外縁部から下部構造物かかる荷重ｑ１を小さくできる。これにより、既設の下部構造物でも張出歩道ブロックＡを安定して支持することができる。   On the other hand, as shown in FIG. 5 (B), if the main body block 10 is provided with the wire mesh 20, the load of the backfill material 57 is applied to the wire mesh 20 inclined to the road side in addition to the fixed bottom plate 11. The center of gravity moves to the road side. Therefore, the uneven load applied to the lower structure can be reduced, and the load q1 applied to the lower structure from the outer edge portion of the fixing bottom plate 11 can be reduced. Thereby, the overhanging sidewalk block A can be stably supported even in the existing lower structure.

また、金網２０の傾斜角度を調整することで、金網２０上部の裏込め材５７の量を増減できるので、金網２０にかかる裏込め材５７の荷重を調整でき、張出歩道ブロックＡの重心を最適な位置に移動させることができる。したがって、本体ブロック１０のサイズ等に合わせて金網２０の傾斜角度を調整することで、重心を最適な位置とすることができる。   Further, by adjusting the inclination angle of the wire mesh 20, the amount of the backfill material 57 on the upper portion of the wire mesh 20 can be increased or decreased, so that the load of the backfill material 57 on the wire mesh 20 can be adjusted, and the center of gravity of the overhanging sidewalk block A can be increased. It can be moved to the optimal position. Therefore, the center of gravity can be set to the optimum position by adjusting the inclination angle of the wire mesh 20 according to the size of the main body block 10 and the like.

〔第２実施形態〕
図６に示すように、本発明の第２実施形態に係る張出歩道ブロックＢは、第１実施形態の張出歩道ブロックＡにおいて、背面板としてコンクリートパネル２１を採用した形態である。その余の構成は第１実施形態を同様であるので、同一部材に同一符号を付して説明を省略する。 [Second Embodiment]
As shown in FIG. 6, the overhanging sidewalk block B according to the second embodiment of the present invention is a form in which a concrete panel 21 is employed as a back plate in the overhanging sidewalk block A of the first embodiment. Since the other structure is the same as that of 1st Embodiment, the same code | symbol is attached | subjected to the same member and description is abbreviate | omitted.

コンクリートパネル２１は略方形の板材である。コンクリートパネル２１の幅寸法は、定着底版１１と略同一としてもよいし、それより長尺としてもよい。定着底版１１の隆起部１４の頂部には凹部１４ａが形成されており、凹部１４ａにコンクリートパネル２１の下縁が嵌め込まれている。コンクリートパネル２１は凹部１４ａを中心に傾斜角度を調整可能となっている。   The concrete panel 21 is a substantially square plate material. The width dimension of the concrete panel 21 may be substantially the same as that of the fixing bottom plate 11 or may be longer than that. A concave portion 14a is formed at the top of the raised portion 14 of the fixing bottom plate 11, and the lower edge of the concrete panel 21 is fitted into the concave portion 14a. The concrete panel 21 can adjust the inclination angle around the recess 14a.

背面板をコンクリートパネル２１としても、定着底版１１に加えて道路側に傾斜したコンクリートパネル２１にも裏込め材５７の荷重がかかるので、張出歩道ブロックＢの重心が道路側に移動する。しかも、コンクリートパネル２１の自重によっても張出歩道ブロックＢの重心を道路側に移動させることができる。これにより、下部構造物にかかる荷重の偏りを低減できる。   Even if the back panel is the concrete panel 21, the load of the backfill material 57 is also applied to the concrete panel 21 inclined to the road side in addition to the fixed bottom plate 11, so that the center of gravity of the overhanging sidewalk block B moves to the road side. In addition, the center of gravity of the overhanging sidewalk block B can be moved to the road side by the dead weight of the concrete panel 21. Thereby, the bias of the load applied to the lower structure can be reduced.

なお、背面板は金網２０や樹脂網、コンクリートパネル２１に限定されず、裏込め材５７を保持できる部材であればよい。   The back plate is not limited to the wire mesh 20, the resin mesh, or the concrete panel 21, and may be any member that can hold the backfill material 57.

Ａ、Ｂ 張出歩道ブロック
１０ 本体ブロック
１１ 定着底版
１２ 側壁版
１３ 張出床版
２０ 金網
３０ 角度調整部材 A, B Overhang sidewalk block 10 Main body block 11 Fixed bottom plate 12 Side wall plate 13 Overhang floor plate 20 Wire mesh 30 Angle adjustment member

Claims (4)

定着底版と、該定着底版の外縁上面に立設された側壁版と、該側壁版の上端外面に連接された張出床版とからなる本体ブロックと、
前記定着底版の内縁部から道路側に傾斜し、傾斜角度を調整可能に設けられた背面板と、を備える
ことを特徴とする張出歩道ブロック。 A main body block comprising a fixing bottom plate, a side wall plate standing on the upper surface of the outer edge of the fixing bottom plate, and an overhanging floor plate connected to the upper outer surface of the side wall plate;
An overhanging sidewalk block, comprising: a back plate that is inclined from the inner edge of the fixing bottom plate toward the road and is provided so that the inclination angle can be adjusted. 前記背面板を任意の傾斜角度で前記本体ブロックに固定する角度調整部材を備える
ことを特徴とする請求項１記載の張出歩道ブロック。 The overhanging sidewalk block according to claim 1, further comprising an angle adjusting member for fixing the back plate to the main body block at an arbitrary inclination angle. 前記背面板は網である
ことを特徴とする請求項１または２記載の張出歩道ブロック。 The overhanging sidewalk block according to claim 1 or 2, wherein the back plate is a net. 前記背面板はコンクリートパネルである
ことを特徴とする請求項１または２記載の張出歩道ブロック。 The overhanging sidewalk block according to claim 1 or 2, wherein the back plate is a concrete panel.
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JP2018021300A (en) * 2016-08-01 2018-02-08 ケイコン株式会社 Overhung sidewalk constituent body, and construction method of overhung sidewalk using the same
CN110761127A (en) * 2019-12-04 2020-02-07 中铁二院工程集团有限责任公司 Rock foundation existing high-speed railway embankment force balance side width structure and construction method

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JP2018021300A (en) * 2016-08-01 2018-02-08 ケイコン株式会社 Overhung sidewalk constituent body, and construction method of overhung sidewalk using the same
CN110761127A (en) * 2019-12-04 2020-02-07 中铁二院工程集团有限责任公司 Rock foundation existing high-speed railway embankment force balance side width structure and construction method

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