JP2010168844A - Road widening structure - Google Patents

Road widening structure Download PDF

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JP2010168844A
JP2010168844A JP2009013818A JP2009013818A JP2010168844A JP 2010168844 A JP2010168844 A JP 2010168844A JP 2009013818 A JP2009013818 A JP 2009013818A JP 2009013818 A JP2009013818 A JP 2009013818A JP 2010168844 A JP2010168844 A JP 2010168844A
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road
shaped block
widening
block body
plate portion
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JP4726259B2 (en
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Akihiro Tasaka
晃宏 田坂
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Daiwa Cres Co Ltd
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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

<P>PROBLEM TO BE SOLVED: To provide a road widening structure capable of shortening a construction term and achieving high strength. <P>SOLUTION: This road widening structure is constituted by providing a high level foundation body in a road shoulder part on a valley side of an existing road, providing a low level foundation body in a slope part in contact with the road shoulder part along the existing road, and erecting a plurality of roadbed members for widening road composed of L-shaped block by inverting them in the reverse L-shape, and arranging them along the existing road. A locking rib formed in a tip edge part of a lower face of a horizontal board part of the L-shaped block is engaged with a fastening rib formed in an outer edge part of an upper face of the high level foundation body to support the horizontal board part of the L-shaped block on the high level foundation body and support a lower end of a vertical board part of the L-shaped block on the low level foundation body. A space surrounded by the L-shaped block and the slope part is filled with a stuffing filler to support load to be applied on a roadbed part for widening road by the slope part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、谷側の路肩部より下向きに傾斜した法面部を上載荷重の支承部として利用した道路拡幅構造に関する。 The present invention relates to a road widening structure using a slope portion inclined downward from a shoulder portion on the valley side as a support portion for an overload.

山岳地等の斜面の途中に造成された既設道路において、交通量の増加や大型車両の乗り入れ開放によって道路の拡幅が必要となった場合には、山側に道路を拡幅することが困難であるため、谷側の法面部の上方空間に拡幅用の路床部材を張り出させることが行われている。 In existing roads built in the middle of slopes in mountainous areas, etc., it is difficult to widen the road to the mountain side if it is necessary to widen the road due to increased traffic volume or the opening of large vehicles. A roadbed member for widening is projected over the space above the slope portion on the valley side.

従来の道路拡幅工法の一例においては、法面部に間隔を隔てて埋設された基礎にコンクリート製の支柱を支持させ、その各支柱間に梁を架け渡し、当該梁と、既設道路の側縁に設置した支持梁とに路床版の両側縁をそれぞれ支持させている（特許文献１参照）。 In an example of a conventional road widening method, a concrete support is supported on a foundation embedded with a gap in the slope, and a beam is bridged between each support, and the beam is attached to the side edge of the existing road. Both side edges of the road bed slab are supported by the installed support beams (see Patent Document 1).

しかし、上記の道路拡幅工法では、支柱を立設する工程、支柱間に梁を架け渡す工程、路床版を設置する工程等、施工現場における工程が多く、工期が長期化し、施工費用が嵩むという問題があった。また、路床版を支柱によって支持する構造であるため、車道のように大きな負荷のかかるものに対しては十分な強度を得ることが困難であるという問題があった。 However, in the road widening method described above, there are many processes at the construction site, such as the process of erecting the columns, the process of bridging the beams between the columns, and the process of installing the road bed slab. There was a problem. Further, since the road bed slab is supported by the support column, there is a problem that it is difficult to obtain sufficient strength for a heavy load such as a roadway.

別の道路拡幅構造では、既設道路の谷側路肩部に上位基礎体を設け、前記路肩部に接する法面部に下位基礎体を設け、Ｌ字ブロック体よりなる複数の拡幅用路床部材を逆Ｌ字状に倒立させて並設し、前記上位基礎体に載せた前記Ｌ字ブロック体の水平版部の先端部をアンカーボルトによって前記上位基礎体に固定し、前記Ｌ字ブロック体の垂直版部の下端を前記下位基礎体の上面に支持させている（特許文献２参照）。 In another road widening structure, an upper foundation body is provided on the shoulder portion of the valley side of the existing road, a lower foundation body is provided on the slope portion in contact with the road shoulder portion, and a plurality of widening roadbed members made of L-shaped block bodies are reversed. A vertical plate of the L-shaped block body is fixed to the upper base body by anchor bolts, the tip of the horizontal plate portion of the L-shaped block body placed upside down in an L-shape and placed on the upper base body. The lower end of the part is supported on the upper surface of the lower basic body (see Patent Document 2).

この道路拡幅構造では、前記Ｌ字ブロック体と法面部に囲まれた空間は、電線等の生活導線を配設する空間、あるいは道路の整備用品等の倉庫として利用するので、空間のまま放置されており、前記Ｌ字ブロック体の水平版部を通行する車両からの上載荷重が、前記下位基礎体に直接負荷されるため、所要の支承力を確保するために、前記法面部に所定間隔で複数の基礎杭を打ち込み、当該基礎杭の上端溝部に前記下位基礎体を嵌着し、前記Ｌ字ブロック体の垂直版部の下端をアンカーボルトによって前記下位基礎体に固定している。 In this road widening structure, the space surrounded by the L-shaped block body and the slope portion is used as a space for arranging a living lead such as an electric wire or a warehouse for road maintenance goods, so it is left as it is. In order to ensure the required bearing force, the upper load from the vehicle passing through the horizontal plate portion of the L-shaped block body is directly applied to the lower base body. A plurality of foundation piles are driven in, the lower foundation body is fitted into the upper end groove portion of the foundation pile, and the lower end of the vertical plate portion of the L-shaped block body is fixed to the lower foundation body by an anchor bolt.

しかしながら、谷側の法面部への基礎杭の打ち込みは容易な工事ではなく、多数本の基礎杭の打ち込みのために既設道路を占用する期間、すなわち道路閉鎖等の交通規制の期間が長くなり、その道路が生活用道路であるときには地域住民への影響が大きい。また、アンカーボルトによる前記上位基礎体及び下位基礎体に対するＬ字ブロック体の固定作業も煩雑であり、工期が長くなる原因となる。 However, it is not easy construction to drive foundation piles into the slope of the valley side, and the period of occupying the existing road to drive a large number of foundation piles, that is, the period of traffic regulation such as road closure becomes longer, When the road is a residential road, the impact on local residents is great. Moreover, the fixing work of the L-shaped block body with respect to the upper base body and the lower base body using the anchor bolts is complicated, which causes a long construction period.

特開２０００−３５２００１号公報JP 2000-352001 A 特開２００４−３４６７２９号公報JP 2004-346729 A

本発明の課題は、施工コストの嵩む基礎杭の打ち込み作業がなく、工期の短縮が可能で高い強度を有する道路拡幅構造を提供することである。 An object of the present invention is to provide a road widening structure that does not require a driving work for a foundation pile with a high construction cost, can be shortened, and has high strength.

請求項１の発明の道路拡幅構造では、既設道路の谷側の路肩部に上位基礎体を設け、前記路肩部に接する法面部に下位基礎体を前記既設道路に沿って設け、Ｌ字ブロック体よりなる複数の拡幅用路床部材を逆Ｌ字状に倒立させて前記既設道路に沿って並設し、前記Ｌ字ブロック体の水平版部の先端部を前記上位基礎体に支持させる一方、前記Ｌ字ブロック体の垂直版部の下端を前記下位基礎体の上面に支持させて、前記Ｌ字ブロック体と前記法面部に囲まれた空間に中詰充填材を充填し、拡幅路床部の上載荷重を前記法面部で支承させるようにしたものである。 In the road widening structure according to the first aspect of the present invention, an upper base body is provided on the shoulder portion on the valley side of the existing road, and a lower base body is provided along the existing road on the slope portion in contact with the road shoulder portion. A plurality of widening roadbed members inverted in an inverted L shape and juxtaposed along the existing road, while supporting the tip of the horizontal plate portion of the L-shaped block body on the upper base body, The lower end of the vertical plate portion of the L-shaped block body is supported on the upper surface of the lower base body, and the space surrounded by the L-shaped block body and the slope portion is filled with the filling material, and the widened road bed portion Is supported by the slope portion.

請求項２の発明の道路拡幅構造は、請求項１の発明の前記構成に加えて、前記Ｌ字ブロック体の水平版部の下面先端縁部に係止リブを形成し、前記上位基礎体の上面外縁部に留止リブを形成し、前記係止リブを前記留止リブに係合させて、前記Ｌ字ブロック体の水平版部を前記上位基礎体に支持させたものである。 A road widening structure according to a second aspect of the present invention is the road widening structure according to the first aspect, wherein a locking rib is formed at a lower end edge of the horizontal plate portion of the L-shaped block body. A retaining rib is formed on the outer edge of the upper surface, the locking rib is engaged with the retaining rib, and the horizontal plate portion of the L-shaped block body is supported by the upper base body.

請求項１の発明の道路拡幅構造では、既設道路の谷側の路肩部に設けた上位基礎体に前記Ｌ字ブロック体の水平版部の先端部を支持させる一方、前記Ｌ字ブロック体の垂直版部の下端を前記下位基礎体の上面に支持させ、前記Ｌ字ブロック体と前記法面部に囲まれた空間に中詰充填材を充填して、前記Ｌ字ブロック体と前記法面部が一体構造化しており、前記Ｌ字ブロック体の水平版部に負荷される通行車両Ｃからの上載荷重が、前記法面部の全面に伝達されるため、十分に大きな支承力を確保でき、基礎杭がなくても強度の高い道路拡幅構造が的確に得られる。 In the road widening structure according to the first aspect of the invention, the upper base body provided on the shoulder portion on the valley side of the existing road supports the front end portion of the horizontal plate portion of the L-shaped block body, while the L-shaped block body is vertical. The lower end of the printing plate is supported on the upper surface of the lower base body, the space surrounded by the L-shaped block body and the slope portion is filled with a filling material, and the L-shaped block body and the slope portion are integrated. Since it is structured and the overload from the passing vehicle C loaded on the horizontal plate portion of the L-shaped block body is transmitted to the entire surface of the slope portion, a sufficiently large bearing force can be secured, and the foundation pile Even without it, a road widening structure with high strength can be obtained accurately.

このように施工が容易でない法面部への基礎杭の打ち込み作業が不要となるため、道路拡幅工事の工期が短縮化され、施工コストを節減できる。また、基礎杭の打ち込み用機械設備によって道路を封鎖することがないので、道路の通行規制が少なくなり、生活用道路である場合、地域住民に与える影響が少ない。 Thus, since it is not necessary to drive the foundation pile into the slope part where the construction is not easy, the construction period of the road widening work is shortened and the construction cost can be reduced. In addition, since the road is not blocked by the foundation pile driving machinery and equipment, road traffic restrictions are reduced, and in the case of a residential road, there is little impact on local residents.

また、請求項２の発明の道路拡幅構造では、前記Ｌ字ブロック体と前記法面部に囲まれた空間に中詰充填材を充填するとき、前記Ｌ字ブロック体の水平版部の下面先端縁部の係止リブが、前記上位基礎体の上面外縁部の留止リブに係合している一方、前記Ｌ字ブロック体の垂直版部の下端が前記下位基礎体の上面に支持されているため、前記Ｌ字ブロック体は、アンカーボルトを使用することなく、中詰め充填材の充填開始から固化に至るまで当初の据付け位置に安定に保持されているため、充填作業がやり易く、また、拡幅路床部の完成寸法に狂いが生じない。
アンカーボルトによる締め付け固定作業が不要であるため、さらに工期の短縮が図れる。 Further, in the road widening structure of the invention of claim 2, when filling the filling material into the space surrounded by the L-shaped block body and the slope portion, the lower end edge of the horizontal plate portion of the L-shaped block body The engaging ribs of the portion engage with the retaining ribs on the outer edge of the upper surface of the upper base body, while the lower end of the vertical plate portion of the L-shaped block body is supported on the upper surface of the lower base body Therefore, since the L-shaped block body is stably held at the initial installation position from the start of filling of the filling material to the solidification without using anchor bolts, the filling operation is easy to perform, There is no deviation in the completed dimensions of the widened roadbed.
The tightening and fixing work with anchor bolts is not necessary, so the construction period can be further shortened.

本発明の道路拡幅構造は、現況を極力崩すことなく簡単に施工が可能であり、通行止め等による道路規制も抑制でき、大型車両が通行しても荷重分散でき、雨水等による法面の侵食を防ぐこともできる。また、カーブ施工に対しても容易に対応が可能である。 The road widening structure of the present invention can be easily constructed without disrupting the current situation as much as possible, can suppress road regulation due to traffic closure, etc., can disperse load even when large vehicles pass, and erodes slopes due to rainwater, etc. It can also be prevented. Moreover, it is possible to easily cope with curve construction.

図示の実施例では、上位基礎体１は、拡幅対象の既設道路Ａの谷側の路肩部を適宜に掘削して締め固め、所要間隔に配置した型枠パネル間に鉄筋を組み込み、場所打ちコンクリートを流し込んで硬化させることによって形成される。上位基礎体１は、既設道路Ａに沿って一連に設置されており、留止リブ２は上位基礎体１の谷側縁部に形成されている。
下位基礎体３は、既設道路Ａの谷側の路肩部より下向きに傾斜した法面部Ｂを適宜に掘削して締め固め、所要間隔に配置した型枠パネル間に鉄筋を組み込み、場所打ちコンクリートを流し込んで硬化させることによって形成される。下位基礎体３は、既設道路Ａに沿って一連に設置されている。 In the illustrated embodiment, the upper foundation body 1 appropriately excavates and compacts the shoulder on the valley side of the existing road A to be widened, incorporates reinforcing bars between the formwork panels arranged at the required intervals, and casts in place concrete. It is formed by pouring and curing. The upper foundation body 1 is installed in series along the existing road A, and the retaining rib 2 is formed on the valley side edge of the upper foundation body 1.
The lower foundation 3 is made by appropriately excavating and compacting the slope portion B inclined downward from the shoulder on the valley side of the existing road A, incorporating reinforcing bars between the formwork panels arranged at a required interval, and placing cast-in-place concrete. It is formed by pouring and curing. The lower basic bodies 3 are installed in series along the existing road A.

拡幅用路床部材のＬ字ブロック体４はプレキャストコンクリート製品であり、水平版部５と垂直版部６とで構成されている。水平版部５の下面先端部には係止リブ７が一連に形成されている。垂直版部６は水平版部５の基端部側に直角に形成されている。水平版部５の基端部上面には段差を付けて車輪止めリブ８が形成されており、車輪止めリブ８にはガードレール９の支柱１０が挿入される受孔１１が形成されている。
水平版部５には半円形の充填用開口部１２が形成されており、隣り合う２枚の水平版部５の充填用開口部１２が合わされた円形開口部を通して、場所打ちコンクリート等の中詰め充填材１３が充填される。中詰め充填材１３としては、コンクリートや重量モルタル等が使用できる。
炉床を構成するＬ字ブロック体４の水平版部５の上面部には、既設道路Ａの舗装面にレベルを揃えて舗装層１４が施される。
なお、施工法面によっては、杭やアンカー筋１５を打ち込むことによって滑動に対して対抗させることもできる。 The L-shaped block body 4 of the roadbed member for widening is a precast concrete product, and is composed of a horizontal plate portion 5 and a vertical plate portion 6. A locking rib 7 is formed in a series at the tip of the lower surface of the horizontal plate portion 5. The vertical plate portion 6 is formed at a right angle on the base end side of the horizontal plate portion 5. A wheel stopper rib 8 is formed with a step on the upper surface of the base end portion of the horizontal plate portion 5, and a receiving hole 11 into which the column 10 of the guard rail 9 is inserted is formed in the wheel stopper rib 8.
The horizontal plate portion 5 is formed with a semicircular filling opening 12, and filled with cast-in-place concrete or the like through the circular opening formed by combining the filling openings 12 of two adjacent horizontal plate portions 5. Filler 13 is filled. As the filling material 13 for filling, concrete, heavy mortar, or the like can be used.
A pavement layer 14 is applied to the upper surface portion of the horizontal plate portion 5 of the L-shaped block body 4 constituting the hearth so as to align the level with the pavement surface of the existing road A.
Note that, depending on the construction slope, it is possible to counteract sliding by driving a pile or anchor bar 15.

本発明の一実施例に係る道路拡幅構造を示し、中詰め充填材の充填前における斜視図である。FIG. 2 is a perspective view showing a road widening structure according to an embodiment of the present invention before filling with an intermediate filling material. 図１の道路拡幅構造に使用されたＬ字ブロック体の斜視図である。It is a perspective view of the L-shaped block body used for the road widening structure of FIG. 図２のＬ字ブロック体の別の方向からの斜視図である。It is a perspective view from another direction of the L-shaped block body of FIG. 中詰め充填材の充填後における本発明の道路拡幅構造の斜視図である。It is a perspective view of the road widening structure of this invention after filling with a filling material for filling.

Ａ 既設道路
Ｂ 法面部
Ｃ 車両
１ 上位基礎体
２ 留止リブ
３ 下位基礎体
４ Ｌ字ブロック体
５ 水平版部
６ 垂直版部
７ 係止リブ
８ 車輪止めリブ
９ ガードレール
１０ 支柱
１１ 受孔
１２ 充填用開口部
１３ 中詰め充填材
１４ 舗装層 A Existing road B Slope C Vehicle 1 Upper base body 2 Retaining rib 3 Lower base body 4 L-shaped block body 5 Horizontal plate portion 6 Vertical plate portion 7 Locking rib 8 Wheel stop rib 9 Guard rail 10 Post 11 Receiving hole 12 Filling Opening 13 for filling 14 filling layer for paving

Claims (2)

既設道路の谷側の路肩部に上位基礎体を設け、前記路肩部に接する法面部に下位基礎体を前記既設道路に沿って設け、Ｌ字ブロック体よりなる複数の拡幅用路床部材を逆Ｌ字状に倒立させて前記既設道路に沿って並設し、前記Ｌ字ブロック体の水平版部の先端部を前記上位基礎体に支持させる一方、前記Ｌ字ブロック体の垂直版部の下端を前記下位基礎体の上面に支持させ、前記Ｌ字ブロック体と前記法面部に囲まれた空間に中詰充填材を充填し、拡幅路床部の上載荷重を前記法面部で支承させるようにした道路拡幅構造。 An upper foundation body is provided on the shoulder portion on the valley side of the existing road, a lower foundation body is provided along the existing road on the slope portion in contact with the road shoulder portion, and a plurality of widening roadbed members made of L-shaped block bodies are reversed. Inverted in an L shape and juxtaposed along the existing road, the upper end of the horizontal plate portion of the L-shaped block body is supported by the upper base body, while the lower end of the vertical plate portion of the L-shaped block body Is supported on the upper surface of the lower base body, and a space surrounded by the L-shaped block body and the slope portion is filled with a filling material so that the load on the widened road floor is supported by the slope portion. Road widening structure. 前記Ｌ字ブロック体の水平版部の下面先端縁部に係止リブを形成し、前記上位基礎体の上面外縁部に留止リブを形成し、前記係止リブを前記留止リブに係合させて、前記Ｌ字ブロック体の水平版部を前記上位基礎体に支持させたことを特徴とする請求項１に記載の道路拡幅構造。 A locking rib is formed at the lower edge of the horizontal plate portion of the L-shaped block body, a retaining rib is formed at the outer edge of the upper surface of the upper base body, and the locking rib is engaged with the retaining rib. The road widening structure according to claim 1, wherein a horizontal plate portion of the L-shaped block body is supported by the upper base body.
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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
CN113373750A (en) * 2021-06-30 2021-09-10 中铁二院工程集团有限责任公司 Steep slope high-fill-section roadbed structure and construction method thereof
CN113389150A (en) * 2021-07-22 2021-09-14 山东省交通规划设计院集团有限公司 Highway reconstruction and extension construction method for expanded bridge road section

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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
CN113373750A (en) * 2021-06-30 2021-09-10 中铁二院工程集团有限责任公司 Steep slope high-fill-section roadbed structure and construction method thereof
CN113373750B (en) * 2021-06-30 2022-05-24 中铁二院工程集团有限责任公司 Steep slope high-fill-section roadbed structure and construction method thereof
CN113389150A (en) * 2021-07-22 2021-09-14 山东省交通规划设计院集团有限公司 Highway reconstruction and extension construction method for expanded bridge road section

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