JP2005220666A

JP2005220666A - Tube girder viaduct

Info

Publication number: JP2005220666A
Application number: JP2004031140A
Authority: JP
Inventors: Yasuo Egashira; 泰生江頭; Akira Fujimoto; 朗藤本
Original assignee: Sumitomo Heavy Industries Ltd
Current assignee: Sumitomo Heavy Industries Ltd
Priority date: 2004-02-06
Filing date: 2004-02-06
Publication date: 2005-08-18

Abstract

<P>PROBLEM TO BE SOLVED: To provide a viaduct capable of collectively reducing construction cost by imparting an ancillary facility function to a bridge body, in the light of the inconvenience of increasing cost caused by arranging an ancillary facility due to the arrangement of the ancillary facility separately from the bridge body in a conventional viaduct. <P>SOLUTION: This viaduct is constituted so that a tubular bridge girder having a closed cross section is supported by a pier, a traffic floor slab is installed in the bridge girder, an illuminating lamp is arranged on a bride girder inner wall, and the function of the ancillary facility is used in common for the bridge girder. The viaduct is characterized in that a shape of the closed cross section is formed in a rectangular shape, a circular shape and an elliptic shape. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、高架橋に関するものであり、特に、交通騒音の防止や景観性の悪化を防ぎ、照明施設を容易に設備することができ、また、建設費を縮減することができる閉断面の、チューブ状橋桁を用いた高架橋に係わる。 TECHNICAL FIELD The present invention relates to a viaduct, and in particular, a closed-section tube that can prevent traffic noise and deterioration of scenery, can easily install a lighting facility, and can reduce construction costs. Related to viaducts using bridge girder.

一般に、高架橋を建設する場合、橋脚上に、交通方向に主桁を配置し、主桁間に横桁や斜材メンバーを取り付け、これらの桁に支持させて床版を設けている。そして、併せてこの橋梁本体に付帯する照明施設、防音施設や景観性の悪化を防止するための化粧板などの付帯設備も建設される。 In general, when constructing a viaduct, main girders are arranged on the pier in the traffic direction, horizontal girders and diagonal members are attached between the main girders, and floor slabs are provided by these girders. In addition, incidental facilities such as a lighting facility attached to the bridge body, a soundproofing facility, and a decorative panel for preventing deterioration of the scenery are also constructed.

従来の付帯設備は、橋梁本体に付帯設備機能を持たせていないことから、橋梁本体上に、橋梁本体とは別途に付帯設備を設ける必要があった。このため、付帯設備設置に伴う工費の増加と各付帯設備の以下のような欠点が問題となっている。
照明設備は、適宜の間隔で照明ポールを設置しているが、この照明ポールを設置するため、高架橋の床版や高欄に取り付け構造が必要であり、工費がかかる。また、照明ポールは交通振動による疲労が激しく、その取り付け部の耐久性に問題があり、疲労によるクラックが発生することもある。 Since the conventional incidental facilities do not have the incidental facility function in the bridge body, it is necessary to provide the incidental facilities on the bridge body separately from the bridge body. For this reason, the increase in construction cost accompanying incidental installation and the following faults of each incidental installation are problems.
In the lighting equipment, lighting poles are installed at an appropriate interval. However, since these lighting poles are installed, an installation structure is required on a viaduct floor slab or a railing, which requires work costs. In addition, the lighting pole is very fatigued due to traffic vibration, and there is a problem in the durability of the mounting portion, and cracks due to fatigue may occur.

防音設備は、高架橋の両側に防音壁を設置しているが、この防音壁も高架橋の床版や高欄に取り付け、自立させる構造であり、その取り付け構造が必要になるが、台風などの強風を受けるため、強固な取り付け構造が必要となる。また、防音壁は非常に高価であり、工費が嵩むことになる。さらに、桁構造の上方に防音壁が設置されると、景観的に圧迫感を与え、不安感が拭えないことになる。 The soundproofing equipment has soundproofing walls on both sides of the viaduct, but this soundproofing wall is also attached to the viaduct floor slab and railing so that it can stand on its own. Therefore, a strong mounting structure is required. In addition, the soundproof wall is very expensive, which increases the construction cost. Furthermore, if a soundproof wall is installed above the girder structure, it will give a sense of pressure in the landscape, and anxiety cannot be wiped off.

化粧板は、都市部において高架橋を建設するとき、主桁構造を見せると圧迫感を与えるなど周辺景観を悪化させるので、その構造を塞ぐように主桁の下面に取り付けているが、化粧板も高価であり、高架橋建設工費を大幅にアップする要因になっている。 When building a viaduct in an urban area, the decorative board deteriorates the surrounding landscape, such as giving a feeling of pressure when the main girder structure is shown, so it is attached to the lower surface of the main girder so as to close the structure. It is expensive and is a factor that significantly increases the cost of viaduct construction.

中には、一部このような問題点を解決するため、遮音壁の機能を発揮する高さのある主桁を用い、主桁上部にはシールド屋根を取り付けるようにした高架橋の構造が提案されている（例えば、特許文献１参照）。
しかし、この構成では、主桁に遮音壁を兼用されるだけであり、構造材的には主桁間に横桁を配置する従来型と同等である。そして、シールド屋根は橋梁本体とは別途に設置されるし、主桁構造下面には化粧板を施す必要もある。 In order to solve some of these problems, a viaduct structure has been proposed in which a main girder with a height that functions as a sound insulation wall is used, and a shield roof is attached to the top of the main girder. (For example, refer to Patent Document 1).
However, in this configuration, only the sound insulation wall is used for the main girder, and the structural material is equivalent to the conventional type in which a horizontal girder is arranged between the main girder. The shield roof is installed separately from the bridge body, and it is necessary to apply a decorative panel to the lower surface of the main girder structure.

特開２００１−１４０２１６号公報（図１〜図３、第１〜２頁）JP 2001-140216 A (FIGS. 1 to 3, pages 1 and 2)

本発明は、橋梁本体に付帯設備機能を持たせ、総合的に建設費が縮減できる高架橋を得ることを目的とする。 It is an object of the present invention to obtain a viaduct that can provide an auxiliary facility function to a bridge body and can reduce the construction cost comprehensively.

高架橋であって、橋脚に閉断面の、チューブ状とした橋桁を支承し、該橋桁内に交通床版を施設すると共に、該橋桁に付帯設備の機能を兼用させた構成とした。閉断面の形状を矩形、円形、楕円形としたことも特徴とする。 It is a viaduct, and a bridge-shaped bridge girder with a closed cross section is supported on the bridge pier, a traffic floor slab is installed in the bridge girder, and the function of ancillary equipment is also used in the bridge girder. Another feature is that the shape of the closed cross section is rectangular, circular, or elliptical.

橋桁を閉断面の、チューブ状としたので、構造材として主桁と横桁とを兼ねることができ、かつ、橋桁がそのまま防音壁および化粧板としての機能を発揮するし、照明についても別途の照明ポールなどを要さず、直接橋桁に設備できる。
高架橋としての部品点数が削減できるし、防音壁および化粧板を別途設備することがなく、付帯設備のための工費、ひいては高架橋の建設費を縮減できる。 Since the bridge girder has a closed cross-section, it can be used as the main girder and horizontal girder as a structural material, and the bridge girder can function as a soundproof wall and a decorative board as it is, and lighting is also separately provided It can be installed directly on the bridge girder without the need for lighting poles.
The number of parts as a viaduct can be reduced, and there is no need to install a soundproof wall and a decorative board separately.

以下図に沿って、本発明を実施するための最良の形態について説明する。図１は本発明を実施した高架橋の一部破断側面図、図２は同一部破断平面図、図３は同正断面図、図４は本発明の他の例を示す正断面図、図５は本発明のさらに他の例を示す正断面図である。 The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway side view of a viaduct embodying the present invention, FIG. 2 is a plan view of the same section, FIG. 3 is a front sectional view thereof, and FIG. 4 is a front sectional view showing another example of the present invention. FIG. 6 is a front sectional view showing still another example of the present invention.

図において、１は橋脚であり、通常使用されているコンクリート製あるいは鋼管を使用したものである。２は橋脚１上に載置され、固定支持される橋桁であり、閉断面の、チューブ状に形成されている。
このチューブ状の橋桁２は鉄鋼製や鉄鋼とコンクリートの複合構造、あるいは、アルミニウム製など、強度、価格などを考慮して適宜に選択される。 In the figure, reference numeral 1 denotes a pier, which is a concrete or steel pipe that is usually used. A bridge girder 2 is mounted on the pier 1 and fixedly supported, and is formed in a tube shape with a closed cross section.
The tubular bridge girder 2 is appropriately selected in consideration of strength, price, etc., such as steel, a composite structure of steel and concrete, or aluminum.

３は橋桁２の内部に施設された交通床版であり、橋桁２内の底部に支承体４によって支持され、橋桁２の内壁面に固定されている。５は交通床版３の両側に、その全長にわたって固定されている地覆である。
６は橋桁２の内壁天井部分に設備された照明灯であり、７は同じく橋桁２の内壁天井部分に設備された排気ファンなどの排気設備であって、これら照明灯６および排気設備７は橋桁２の交通方向に適宜の間隔を置いて設備されている。なお、図中８は本高架橋に繋がる道路部を示している。 Reference numeral 3 denotes a traffic floor slab installed inside the bridge girder 2, supported by a support 4 at the bottom of the bridge girder 2 and fixed to the inner wall surface of the bridge girder 2. Reference numeral 5 denotes a ground cover fixed on both sides of the traffic floor slab 3 over its entire length.
6 is an illumination lamp installed on the ceiling of the inner wall of the bridge girder 2, and 7 is an exhaust system such as an exhaust fan installed on the ceiling of the inner wall of the bridge girder 2. The illumination lamp 6 and the exhaust installation 7 are connected to the bridge girder. It is installed at appropriate intervals in the two traffic directions. In the figure, reference numeral 8 denotes a road portion connected to the viaduct.

なお、前記した排気設備は、所定間隔ごとに排気塔（図示せず）と、該排気塔に繋げて空気清浄機（図示せず）を設け、排気ガスを清浄化して放出するなど、大気への放出を管理し、周辺環境への影響を軽減することができる。
また、チューブ状橋桁２については、側部ないし上部に適宜窓状の、換気口や明かり採りを設けることができる。 The above-described exhaust equipment is provided with an exhaust tower (not shown) at every predetermined interval and an air purifier (not shown) connected to the exhaust tower so that the exhaust gas is purified and discharged. Can be controlled and the impact on the surrounding environment can be reduced.
Moreover, about the tube-shaped bridge girder 2, a window-shaped ventilation opening and a lighting can be suitably provided in a side part or upper part.

図３、図４、図５にチューブ状橋桁２の正断面形状を示している。図３の正断面形状は楕円形であって、景観的に優れた形状であり、構造材として高い剛性が得られるし、交通床版の幅も広くとれる。図４の正断面形状は円形であって、上下に若干の空部が生じるが、さらに高い剛性が得られるし、景観的にも優れた形状である。図５の正断面形状は矩形であって、上下の空部を小さくでき、幅一杯に交通床版を施設できるので、閉断面空間を効率よく利用できると云う利点が有る。 The front cross-sectional shape of the tubular bridge girder 2 is shown in FIGS. The normal cross-sectional shape of FIG. 3 is an ellipse, and is a landscape-excellent shape. As a structural material, high rigidity is obtained, and the width of a traffic floor slab can be widened. The front cross-sectional shape of FIG. 4 is circular, and some empty portions are generated in the upper and lower sides, but higher rigidity is obtained and the shape is also excellent in landscape. The regular cross-sectional shape of FIG. 5 is a rectangle, and the upper and lower empty portions can be made small, and the traffic floor slab can be installed to the full width. Therefore, there is an advantage that the closed cross-sectional space can be used efficiently.

このように本発明は、閉断面の、チューブ状の橋桁２を使用したものであり、主桁と横桁を兼ねた構造材として剛性の高い橋桁を得ることができる。かつ、この橋桁２に付帯設備の機能を持たせたので、別途に高価な防音壁や化粧板、また、照明用のポールなどを設備する必要がなくなり、高架橋建造工費を大幅に縮減できる。さらに、強風に対しても強い構成の高架橋が得られるものである。 In this way, the present invention uses a tubular bridge girder 2 having a closed cross section, and a highly rigid bridge girder can be obtained as a structural material serving both as a main girder and a horizontal girder. In addition, since the bridge girder 2 has the function of ancillary facilities, it is not necessary to separately provide expensive soundproof walls, decorative panels, lighting poles, etc., and the construction cost of the viaduct can be greatly reduced. Furthermore, a high bridge having a structure strong against strong winds can be obtained.

本発明を実施した高架橋の一部破断側面図。The partially broken side view of the viaduct which implemented this invention. 同一部破断平面図。FIG. 同正断面図。FIG. 本発明の他の例を示す正断面図。FIG. 5 is a front sectional view showing another example of the present invention. 本発明のさらに他の例を示す正断面図。FIG. 6 is a front sectional view showing still another example of the present invention.

符号の説明Explanation of symbols

１橋脚２橋桁
３交通床版４支承体
５地覆６照明灯
７排気設備８道路部 1 Bridge Pier 2 Bridge Girder 3 Traffic Floor Slab 4 Bearing Body 5 Ground Cover 6 Illumination Light 7 Exhaust Equipment 8 Road Section

Claims

橋脚に閉断面の、チューブ状とした橋桁を支承し、該橋桁内に交通床版を施設し、橋桁内壁に照明灯を設備すると共に、該橋桁に付帯設備の機能を兼用させたことを特徴とするチューブ桁高架橋。 A bridge-shaped bridge girder with a closed cross section is supported on the pier, a traffic floor slab is installed in the bridge girder, an illumination light is installed on the inner wall of the bridge girder, and the function of ancillary equipment is also used in the bridge girder. And tube girder viaduct.

閉断面の形状を矩形としたことを特徴とする請求項１記載のチューブ桁高架橋。 2. The tube girder viaduct according to claim 1, wherein the closed cross section has a rectangular shape.

閉断面の形状を円形としたことを特徴とする請求項１記載のチューブ桁高架橋。 2. The tube girder viaduct according to claim 1, wherein the closed cross section has a circular shape.

閉断面の形状を楕円形としたことを特徴とする請求項１記載のチューブ桁高架橋。 2. The tube girder viaduct according to claim 1, wherein the closed cross section has an oval shape.

橋桁の交通方向に、適宜の間隔をおいて排気設備を設けたことを特徴とする請求項１または請求項２または請求項３または請求項４記載のチューブ桁高架橋。 The tube girder viaduct according to claim 1, claim 2, claim 3, or claim 4, wherein an exhaust system is provided at an appropriate interval in the traffic direction of the bridge girder.