JP3844329B2 - Construction girder - Google Patents
Construction girder Download PDFInfo
- Publication number
- JP3844329B2 JP3844329B2 JP2000025499A JP2000025499A JP3844329B2 JP 3844329 B2 JP3844329 B2 JP 3844329B2 JP 2000025499 A JP2000025499 A JP 2000025499A JP 2000025499 A JP2000025499 A JP 2000025499A JP 3844329 B2 JP3844329 B2 JP 3844329B2
- Authority
- JP
- Japan
- Prior art keywords
- girder
- cross
- steel
- construction
- sleeper
- 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.)
- Expired - Lifetime
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Description
【0001】
【発明の属する技術分野】
本発明は線路下構造物を開削工法で構築する際に使用する工事桁に関する。
【0002】
【従来の技術】
線路下構造物を開削工法で構築する場合、軌道を枕木抱き込み式工事桁で仮受けして施工する方法が考えられる。この工法は、図4に示すように、地中に仮受杭を打ち込んで仮受桁を施工し、次いで軌道両側に主桁を施工して既設の枕木間に横桁を渡し、これに枕木を挿入する枕木抱き込み式工事桁を施工して仮受けし、線路下を開削して構造物を構築する工法である。
【0003】
図5は工事桁を説明する図で、図5(a)は軌道に直交する断面図、図5(b)は図5(a)のA−A断面図である。図示するように、工事桁は主に鋼板を溶接したI形断面の鋼製主桁1、レール3を受ける木製の並枕木4を挿入するための鋼板を溶接したU形断面の鋼製横桁2および横桁を載せるため主桁の腹板に溶接された鋼製棚板5で構成されている。図中に溶接部と記してある部分は溶接箇所であり、また図の左側は支点部、右側は中間部を示しており、支点部においては主桁1に端補剛材6が溶接されている。このように主桁、横桁、および棚板は各々鋼板を溶接し、横桁と棚板の間は高力ボルトで固定している。
【0004】
【発明が解決しようとする課題】
しかし、従来の工事桁は主桁、横桁、および棚板を各々鋼板を溶接して製作する構造となっており、溶接量が多いため、コストが高くなるほか、溶接ひずみが発生するという問題があった。
本発明は上記課題を解決するためのもので、コストを低く抑えることができる溶接不要な工事桁を提供することを目的とする。
【0005】
【課題を解決するための手段】
本発明は、主桁と、枕木を挿入するための横桁と、主桁に取り付けられて横桁を載せるための棚板とからなる工事桁において、主桁を形鋼で構成し、横桁を2つのL形鋼を重ね合わせて枕木を挿入するU形断面を形成して高力ボルトで締結することにより構成し、棚板はL形鋼を主桁腹板に高力ボルトで取り付けて構成したことを特徴とする。
【0006】
【発明の実施の形態】
以下、本発明の実施の形態を説明する。
図1は本発明の工事桁の例を説明する図であり、図1(a)は軌道に直交する断面図、図1(b)は図1(a)のA−A断面図である。I形断面の主桁10、レール3を受ける橋枕木13を挿入するための横桁11、横桁を載せるための棚板14で構成されているのは図5の場合と同様であり、図の左側が支点部、右側が中間部を示し、支点部においては主桁10に端補剛材16が取り付けられている点も図5の場合と同じである。
【0007】
主桁は鋼板を溶接して製作する従来法とは異なり、H形鋼または極厚H形鋼等の形鋼からなる主桁10を使用する。横桁も鋼板を溶接する従来法とは異なり、2つの山形鋼(L形鋼)11a、11bを重ね合わせ、打ち込み式高力皿ボルト12で締結してU形断面を形成する。図示の例では、橋梁用の橋枕木13が挿入されている。棚板は、鋼板を主桁腹板に溶接して取り付ける従来法と異なり、山形鋼(L形鋼)14を高力ボルト15で取り付ける。横桁の棚板への取り付けも高力ボルト15を用い、また支点部の端補剛材16も高力ボルト15で接合する。こうして、主桁、横桁、棚板は全て溶接を用いず、形鋼と高力ボルトを用いて製作することができる。
【0008】
図2は本発明の工事桁の他の例を示す図であり、図2(a)は軌道に直交する断面図、図2(b)は図1(a)のA−A断面図で、図1と同一番号は同一内容を示している。
この例は並枕木4が橋枕木に比して断面が小さいので横桁にH形鋼21を使用し、その内側に枕木を挿入するようにした点のみ図1と異なり、それ以外の構成は図1の場合と同じである。なお、H形鋼21端部のウエブ部分21aが棚板に載るように、フランジ21bの一部を切断加工している。
【0009】
図3は本発明の工事桁の他の例を示す図であり、図3(a)は軌道に直交する断面図、図3(b)は図3(a)のA−A断面図で、図1と同一番号は同一内容を示している。
この例は横桁にH形鋼31を使用し、枕木を使用しないで、レール3とH形鋼31のフランジ間に絶縁材32を介在させて直に絶縁締結装置33で締結した点のみ図1と異なり、それ以外の構成は図1の場合と同じである。この例では枕木を使用しないので工事桁の施工性を一層向上させることができる。なお、H形鋼31とレールの間を絶縁するのは信号電流が流れるレール間が短絡するいのを防ぐためである。
【0010】
【発明の効果】
以上のように本発明によれば、形鋼と高力ボルトを用いて製作するため、鋼板を溶接する必要がなく、従来の鋼板を溶接して製作する工事桁に比べて経済性の向上、施工性の向上を図ることができる。また、従来の工事桁と同様の機能を有し、列車荷重を確実に受けることができる。
【図面の簡単な説明】
【図1】 本発明の工事桁の例を説明する図である。
【図2】 本発明の工事桁の他の例を示す図である。
【図3】 本発明の工事桁の他の例を示す図である。
【図4】 軌道の仮受けを説明する図である。
【図5】 工事桁を説明する図である。
【符号の説明】
3…レール、4…並枕木、10…主桁、11,21,31…横桁、11a,11b…L形鋼、12…打ち込み式高力皿ボルト、13…橋枕木、14…棚板、15…高力ボルト、16…端補剛材、21a…ウエブ、21b…フランジ、32…絶縁材、33…絶縁締結装置。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a construction girder used when a structure under a track is constructed by an open-cut method.
[0002]
[Prior art]
When constructing the structure under the track by the open-cut method, it is conceivable that the track is temporarily received with a sleeper-embedded construction girder. As shown in Fig. 4, this construction method lays a temporary pile into the ground and constructs a temporary girder, then constructs a main girder on both sides of the track and passes a horizontal girder between existing sleepers. This is a construction method for constructing a structure by constructing a sleeper-embedding construction girder that is inserted and temporarily received, and then excavating under the track.
[0003]
FIGS. 5A and 5B are diagrams for explaining a construction girder. FIG. 5A is a cross-sectional view orthogonal to the track, and FIG. 5B is a cross-sectional view taken along line AA in FIG. As shown in the figure, the construction girder is mainly a steel main girder having an I-shaped cross section welded with a steel plate, and a steel cross girder with a U-shaped cross section welded with a steel plate for inserting a
[0004]
[Problems to be solved by the invention]
However, the conventional construction girder has a structure in which the main girder, the horizontal girder, and the shelf board are each manufactured by welding steel plates, and the amount of welding is high, which increases costs and causes welding distortion. was there.
The present invention has been made to solve the above-described problems, and an object thereof is to provide a construction girder that does not require welding and can reduce the cost.
[0005]
[Means for Solving the Problems]
The present invention relates to a construction girder composed of a main girder, a cross girder for inserting a sleeper, and a shelf board mounted on the main girder for placing a cross girder. Is formed by overlapping two L-shaped steels to form a U-shaped cross section for inserting a sleeper and fastening with high-strength bolts, and the shelf board is attached to the main girder belly plate with high-strength bolts It is characterized by comprising.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
1A and 1B are diagrams for explaining an example of a construction beam according to the present invention. FIG. 1A is a cross-sectional view orthogonal to the track, and FIG. The
[0007]
Unlike the conventional method in which a main girder is manufactured by welding steel plates, a
[0008]
FIG. 2 is a view showing another example of the construction beam of the present invention, FIG. 2 (a) is a cross-sectional view orthogonal to the track, FIG. 2 (b) is a cross-sectional view taken along line AA of FIG. The same numbers as those in FIG. 1 indicate the same contents.
This example is different from FIG. 1 only in that the
[0009]
FIG. 3 is a view showing another example of the construction beam of the present invention, FIG. 3 (a) is a cross-sectional view orthogonal to the track, FIG. 3 (b) is a cross-sectional view taken along line AA of FIG. The same numbers as those in FIG. 1 indicate the same contents.
In this example, only H-
[0010]
【The invention's effect】
As described above, according to the present invention, since it is manufactured using a shape steel and a high-strength bolt, it is not necessary to weld a steel plate, and the economic efficiency is improved compared to a construction girder manufactured by welding a conventional steel plate, The workability can be improved. Moreover, it has the same function as a conventional construction girder and can reliably receive a train load.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an example of a construction girder according to the present invention.
FIG. 2 is a view showing another example of a construction girder according to the present invention.
FIG. 3 is a diagram showing another example of a construction girder according to the present invention.
FIG. 4 is a diagram for explaining provisional reception of a track.
FIG. 5 is a diagram illustrating a construction girder.
[Explanation of symbols]
3 ... rails, 4 ... average sleepers, 10 ... main girders, 11, 21, 31 ... cross girders, 11a, 11b ... L-shaped steel, 12 ... driven high strength countersunk bolts, 13 ... bridge sleepers, 14 ... shelf boards, DESCRIPTION OF
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000025499A JP3844329B2 (en) | 2000-02-02 | 2000-02-02 | Construction girder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000025499A JP3844329B2 (en) | 2000-02-02 | 2000-02-02 | Construction girder |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2001214405A JP2001214405A (en) | 2001-08-07 |
JP3844329B2 true JP3844329B2 (en) | 2006-11-08 |
Family
ID=18551353
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2000025499A Expired - Lifetime JP3844329B2 (en) | 2000-02-02 | 2000-02-02 | Construction girder |
Country Status (1)
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JP (1) | JP3844329B2 (en) |
Cited By (1)
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JP2020105796A (en) * | 2018-12-27 | 2020-07-09 | 鹿島建設株式会社 | Construction girder and cant adjustment method |
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JP4606665B2 (en) * | 2001-08-29 | 2011-01-05 | 鹿島建設株式会社 | Road construction method |
JP4136959B2 (en) * | 2003-02-12 | 2008-08-20 | 鉄建建設株式会社 | "How to build underground structures and installation girder" |
KR100759923B1 (en) | 2007-05-28 | 2007-09-18 | 김정현 | Low height and longspan girder for a railway |
JP5333073B2 (en) * | 2009-09-03 | 2013-11-06 | 株式会社大林組 | Track height adjustment system and track height adjustment method using the system |
JP2012036615A (en) * | 2010-08-05 | 2012-02-23 | East Japan Railway Co | Construction girder |
JP5867451B2 (en) * | 2012-06-21 | 2016-02-24 | Jfeスチール株式会社 | Temporary bridge construction method and precast slab used in the construction method |
JP6117094B2 (en) * | 2013-12-25 | 2017-04-19 | 鹿島建設株式会社 | Construction girder construction method |
JP6823389B2 (en) * | 2016-07-04 | 2021-02-03 | 東日本旅客鉄道株式会社 | Railroad support structure |
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TWI687571B (en) * | 2017-04-27 | 2020-03-11 | 裕在有限公司 | Connection method of floor board of wooden building to steel beam |
CN107663814A (en) * | 2017-08-14 | 2018-02-06 | 中铁上海工程局集团华海工程有限公司 | One kind be used for underground cable lay a railway track construct service channel at transition apparatus and its construction method |
CN108203901A (en) * | 2018-02-09 | 2018-06-26 | 北京交通大学 | A kind of cross-saddle single-track traffic consolidates formula two-orbit beam |
CA3121143C (en) * | 2018-11-30 | 2023-06-27 | THAVAMANI PANDI, Vellaisamy | System for construction of double u and single u steel concrete composite structure for bridges. |
-
2000
- 2000-02-02 JP JP2000025499A patent/JP3844329B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020105796A (en) * | 2018-12-27 | 2020-07-09 | 鹿島建設株式会社 | Construction girder and cant adjustment method |
JP7132117B2 (en) | 2018-12-27 | 2022-09-06 | 鹿島建設株式会社 | Construction girder and cant adjustment method |
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Publication number | Publication date |
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JP2001214405A (en) | 2001-08-07 |
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