JP2632922B2 - Bridge construction method - Google Patents
Bridge construction methodInfo
- Publication number
- JP2632922B2 JP2632922B2 JP63119037A JP11903788A JP2632922B2 JP 2632922 B2 JP2632922 B2 JP 2632922B2 JP 63119037 A JP63119037 A JP 63119037A JP 11903788 A JP11903788 A JP 11903788A JP 2632922 B2 JP2632922 B2 JP 2632922B2
- Authority
- JP
- Japan
- Prior art keywords
- bridge
- pier
- support bracket
- construction method
- support
- 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
Links
Landscapes
- Bridges Or Land Bridges (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は連続桁やゲルバー桁、或はアーチ橋等の橋梁
の施工方法に関するものである。The present invention relates to a method for constructing a bridge such as a continuous girder, a Gerber girder, or an arch bridge.
＜従来の技術＞ 桁下が高い場合や、河川の水深が深い場合等は、橋脚
上部から片持梁式に桁部材を順次張り出して施工する、
片持式架設工法が採用される。<Conventional technology> When the girder is high or the river is deep, etc., the girder members are overhanged from the upper part of the pier in a cantilever manner.
The cantilever construction method is adopted.
又、施工期間の短縮を目的として、片持式架設工法に
加えて、地上側から支持可能な範囲を場所打ちにより施
工する工法を併用することが知られている。Also, in order to shorten the construction period, in addition to the cantilever type construction method, it is known to use a construction method in which a supportable area from the ground side is cast in place.
ところで、場所打ちする場合、従来は支保工を利用し
ている。By the way, in the case of cast-in-place, a shoring is conventionally used.
この支保工は、鉄骨等からなる支柱を適当な間隔をお
いて鉛直方向に配置し、これらの支柱間に多数の筋かい
部材を接続して組み立てられる。This shoring is assembled by arranging columns made of steel or the like in the vertical direction at appropriate intervals, and connecting a number of bracing members between these columns.
＜本発明が解決しようとする問題点＞ 上記した従来の支保工技術には次のような問題があ
る。<Problems to be Solved by the Present Invention> The above-mentioned conventional support technology has the following problems.
（イ）地上側の支保工の載置部分に基礎工を必要とす
る。(B) A foundation work is required for the mounting part of the ground support.
しかし、基礎工の予定地が急斜面であったり、崩土、
或は軟弱であると、その対策工が大掛かりとなるうえ、
難工事となる。However, the planned site for foundation work is steep slopes,
Or if it is weak, the countermeasures will be large and
It becomes difficult construction.
（ロ）不等沈下により支保工が崩壊する危険性が残り、
安全性の点で問題がある。(B) There is a risk that the support will collapse due to uneven settlement.
There is a problem in terms of safety.
（ハ）支保工の高さが高くなるほど支保工の安定性が悪
化し、その対策工を必要とする。(C) As the height of the shoring increases, the stability of the shoring deteriorates, and countermeasures are required.
（ニ）水平方向の変位を拘束するために、支保工に控用
のワイヤーロープ等を設置しなければならず、その着脱
に手数がかかる。(D) In order to restrain the displacement in the horizontal direction, it is necessary to install a spare wire rope or the like in the support, and it takes time to attach and detach the wire rope.
＜本発明の目的＞ 本発明は以上の点に鑑み成されたもので、次の橋梁の
施工方法を提供することを目的とする。<Object of the present invention> The present invention has been made in view of the above points, and has as its object to provide the following bridge construction method.
（イ）地上側の影響を受けずに施工できる、橋梁の施工
方法。(B) A bridge construction method that can be constructed without being affected by the ground side.
（ロ）支保工が崩壊する心配のない、橋梁の施工方法。(B) A bridge construction method that does not cause collapse of the support structure.
（ハ）施工の経済性が図れる、橋梁の施工方法。(C) A bridge construction method that can achieve economical construction.
＜問題点を解決するための手段＞ 本発明は、橋梁を場所打して構築する橋梁の施工方法
において、橋脚の基礎（フーチング）を利用し、逆三角
形状に組み立てたブラケットの下端をフーチング載置す
ると共に、PC鋼棒等を用いてブラケットを橋脚の周面に
固定し、鉛直方向の荷重をフーチングで支持し、水平方
向の変位を橋脚で拘束した状態で橋梁を場所打ちにより
構築する。<Means for Solving the Problems> According to the present invention, in a bridge construction method in which a bridge is cast in place, a lower end of a bracket assembled in an inverted triangular shape using a foot of a pier is mounted on a footing. At the same time, the bracket is fixed to the peripheral surface of the pier using PC steel bars, etc., the vertical load is supported by footing, and the horizontal displacement is restrained by the pier.
＜本発明の構成＞ 次に図面を参照にしながら、本発明の一実施例につい
て説明する。<Configuration of the Present Invention> Next, an embodiment of the present invention will be described with reference to the drawings.
（イ）支保用ブラケット（第１、２図） 支保用ブラケット１は基本的に、鉛直方向に配置した
複数の鉛直支柱２と、鉛直支柱２の上部で直角方向にの
びる支持部３と、鉛直支柱２の下部と支持部３の自由端
との間を斜めに連結する斜支柱４と、各鉛直支柱２間や
各斜支柱４間及び両支柱間２、４間を連結するトラス部
材５とより構成するトラス構造体であり、例えば鋼材等
を用いて製作する。(A) Support bracket (FIGS. 1 and 2) The support bracket 1 is basically composed of a plurality of vertical supports 2 arranged in the vertical direction, a support portion 3 extending in the right angle direction above the vertical support 2, and a vertical support. An oblique strut 4 that obliquely connects the lower portion of the strut 2 and the free end of the support portion 3; a truss member 5 that interconnects between the vertical struts 2 and between the oblique struts 4 and between the struts 2 and 4; The truss structure is composed of, for example, a steel material.
支持部３の突出長は、構築予定の橋梁の長さにより異
なるが、少なくとも型枠６を安定した状態で支持できる
長さとする。The protruding length of the support portion 3 depends on the length of the bridge to be constructed, but is set to a length that can support at least the formwork 6 in a stable state.
鉛直支柱２の全長は、橋脚７のフーチング８の上面か
ら型枠６までの距離と等しく形成する。The total length of the vertical support 2 is formed equal to the distance from the upper surface of the footing 8 of the pier 7 to the formwork 6.
斜支柱４の下端は、フーチング８の上面に面接触する
よう斜めに形成しておく。The lower end of the inclined support 4 is formed obliquely so as to make surface contact with the upper surface of the footing 8.
又、支持ブラケット１は、各部材を溶接して製作して
も良いが、ボルト止め式に構成すると、支持ブラケット
１の組立及び解体が容易に行える。Further, the support bracket 1 may be manufactured by welding each member. However, when the support bracket 1 is configured by bolting, the assembly and disassembly of the support bracket 1 can be easily performed.
次に橋梁の施工方法について説明する。 Next, a bridge construction method will be described.
（イ）橋梁の張り出し作業（第３図） 橋脚９の頭部9aの両側に橋梁のブロック体9b、9c、9d
・・・を順次接続して水平方向に延長する。(A) Bridge overhang work (Fig. 3) Bridge blocks 9b, 9c, 9d on both sides of the head 9a of the pier 9
Are sequentially connected and extended in the horizontal direction.
この張り出し作業は例えば、公知のトラベラーを用い
て行う。This overhanging operation is performed using, for example, a known traveler.
（ロ）場所打ち作業（第１、２図） ブロック体9b、9c、9d・・・を所定の長さまで延長し
たら、その端から隣の橋脚７までの間（側経部間）に
に、以下の手順に従ってコンクリートの打設する。(B) Cast-in-place operation (Figs. 1 and 2) When the blocks 9b, 9c, 9d ... are extended to a predetermined length, between the ends and the adjacent piers 7 (between the lateral sections), Place concrete according to the following procedure.
［支持ブラケットの取付］ 橋脚７のフーチング８上に、前記支持ブラケット１を
載置する。[Attachment of Support Bracket] The support bracket 1 is placed on the footing 8 of the pier 7.
この場合、支持ブラケット１を構成する鉛直支柱２と
斜支柱４の下端をフーチング８に載置し、鉛直支柱２の
側面を橋脚７の周面に接触させる。In this case, the lower ends of the vertical support 2 and the oblique support 4 constituting the support bracket 1 are placed on the footing 8, and the side surface of the vertical support 2 is brought into contact with the peripheral surface of the pier 7.
そして、PC鋼棒等の連結材10を用いて、鉛直支柱２を
橋脚７に固定する。Then, the vertical support 2 is fixed to the pier 7 using a connecting member 10 such as a PC steel bar.
尚、橋脚７に連結材10を貫通するためには、予め橋脚
７に孔を開設しておく必要がある。In order to penetrate the connecting member 10 into the pier 7, it is necessary to open a hole in the pier 7 in advance.
本発明では、支持ブラケット１の取付作業を、ブロッ
ク体9b、9c、9d・・・の張り出し作業の完了を待たずに
開始できる。In the present invention, the mounting operation of the support bracket 1 can be started without waiting for the overhang operation of the block bodies 9b, 9c, 9d,.
又、フーチング８の上面が傾斜している場合は、この
フーチンウン８上に、水平な上面を有する専用台を増設
し、この専用台に支持ブラケット１を載置する。If the upper surface of the footing 8 is inclined, a dedicated base having a horizontal upper surface is additionally provided on the footing 8, and the support bracket 1 is mounted on the dedicated base.
［型枠の組み立て］ 次に支持ブラケット１の支持部３を作業台として、公
知の仮設部材を用いて型枠６を組み立てる。[Assembly of Form] Next, the form 6 is assembled using the support portion 3 of the support bracket 1 as a work table and using a known temporary member.
［コンクリートの打設］ 型枠６の組立を完了したら型枠６内にコンクリートを
打設して、ブロック体9b、9c、9d・・・と一体の場所打
梁11を構築する。[Concrete Casting] When the assembling of the formwork 6 is completed, concrete is cast into the formwork 6 to construct a place cast beam 11 integrated with the blocks 9b, 9c, 9d,.
［養生、脱型］ 養生期間中、場所打梁11や型枠６等の重量は支持ブラ
ケット１によって橋脚７のフーチング８で支持される。[Healing, Demolding] During the curing period, the weight of the place beam 11 and the formwork 6 are supported by the footing 8 of the pier 7 by the support bracket 1.
又、支持ブラケット１に働く水平方向の変位は、橋脚
７に接続する連結材10によって拘束される。The horizontal displacement acting on the support bracket 1 is restrained by the connecting member 10 connected to the pier 7.
所定の期間経過後、型枠６を解体すると共に、支持ブ
ラケット１を撤去する。After a lapse of a predetermined period, the mold 6 is dismantled and the support bracket 1 is removed.
＜その他の実施例＞ 前記実施例は橋脚７の片側に支持ブラケット１を取り
付けて場所打梁11を構築する場合について説明したが、
支持ブラケット１を転用して橋脚７の両側に場所打ち式
の場所打梁11を構築することも可能である。<Other Embodiments> In the above-described embodiment, the case where the support bracket 1 is attached to one side of the pier 7 to construct the cast-in-place beam 11 has been described.
It is also possible to construct the cast-in-place cast-in-place beam 11 on both sides of the pier 7 by diverting the support bracket 1.
＜本発明の効果＞ 本発明は以上説明したようになるから次の効果が得ら
れる。<Effects of the Present Invention> The present invention is as described above, and the following effects can be obtained.
（イ）橋脚の基礎上面のみで、場所打ちコンクリートの
荷重を支持できる。(A) The load of cast-in-place concrete can be supported only by the top surface of the pier foundation.
従って、従来のような地上側の基礎工が不要となるだ
けでなく、場所打ちする橋梁の下方の形状や地質の影響
をまったく受けないで施工できる。Therefore, not only the conventional foundation work on the ground side is unnecessary, but also the construction can be performed without being affected by the shape and the geology below the bridge to be cast in place.
（ロ）場所打ちしたコンクリートの荷重を橋脚の基礎で
受ける方式であるから、不等沈下を起こす心配がまった
くない。(B) Since the load of cast-in-place concrete is received on the pier foundation, there is no concern about uneven settlement.
（ハ）従来は橋梁の張り出し作業の終了を待って、支保
工の組立作業を行っていた。(C) Conventionally, the work of assembling the shoring has been performed after the completion of the overhang work of the bridge.
これに対し、本発明では橋梁の張り出し作業と並行し
て、場所打梁用の型枠の組立作業を行えるので、工程上
有利である。On the other hand, in the present invention, the assembling work of the cast-in-place formwork can be performed in parallel with the overhang work of the bridge, which is advantageous in the process.
（ニ）支持ブラケットを橋脚に載置し一体に固定するた
め、従来のような控用ロープ材を載置しなくても水平方
向及び鉛直方向の変位を確実に拘束できる。(D) Since the support bracket is mounted on the pier and fixed integrally, the displacement in the horizontal direction and the vertical direction can be reliably restrained without mounting the conventional rope material.
従って、作業の安全性が著しく向上する。 Accordingly, work safety is significantly improved.
（ホ）支持ブラケットを構成する鋼材の使用量を、従来
の支保工に比べて大幅に少なくできる。(E) The amount of steel material constituting the support bracket can be significantly reduced as compared with the conventional shoring.
又、支持ブラケットの解体や組立に要する時間も従来
に比べて約４割近く短縮できる。Also, the time required for disassembly and assembly of the support bracket can be reduced by about 40% as compared with the related art.
（ヘ）支持ブラケットの転用が容易である。(F) Diversion of the support bracket is easy.
第１図：本発明に係る橋梁の施工方法の説明図であっ
て、支持ブラケットを用いて橋梁を施工する時の説明図 第２図：第１図におけるII−IIの断面図 第３図：橋梁の張り出し施工時の説明図FIG. 1 is an explanatory view of a bridge construction method according to the present invention, and is an explanatory view when constructing a bridge using a support bracket. FIG. 2 is a cross-sectional view of II-II in FIG. 1 FIG. Explanatory drawing at the time of bridge overhang construction
Claims (1)
出して構築した橋梁の端部と、別途の橋脚との間に場所
打ちにより橋梁を構築する、橋梁の施工方法において、 橋脚の基礎上に、上部ほど巾広となる逆三角形状に組み
立てたトラス構造体の支持ブラケットの下端を載置する
と共に、 連結材を用いて支持ブラケットを橋脚の周面に一体に固
定し、 鉛直方向の荷重を橋脚基礎で支持し、且つ、水平方向の
変位を橋脚で拘束した状態で橋梁を場所打ちする、 橋梁の施工方法。In a bridge construction method, a bridge is constructed by placing a bridge between an end of a bridge constructed by projecting a cantilevered block body from the head of the bridge pier and a separate pier. On the foundation, place the lower end of the support bracket of the truss structure assembled in an inverted triangular shape that is wider toward the top, and fix the support bracket integrally to the peripheral surface of the pier using connecting materials. A bridge construction method in which the load is supported by the pier foundation, and the bridge is cast in place with the horizontal displacement restrained by the pier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63119037A JP2632922B2 (en) | 1988-05-16 | 1988-05-16 | Bridge construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63119037A JP2632922B2 (en) | 1988-05-16 | 1988-05-16 | Bridge construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01290806A JPH01290806A (en) | 1989-11-22 |
| JP2632922B2 true JP2632922B2 (en) | 1997-07-23 |
Family
ID=14751395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63119037A Expired - Lifetime JP2632922B2 (en) | 1988-05-16 | 1988-05-16 | Bridge construction method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2632922B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194982A (en) * | 2013-03-25 | 2013-07-10 | 中交路桥建设有限公司 | Construction method for short cantilever support at bridge side span cast-in-situ segment |
| CN107130520A (en) * | 2017-05-26 | 2017-09-05 | 中建五局第三建设有限公司 | A kind of Bailey bracket double-layer double-direction arranges high-formwork construction method |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100820299B1 (en) * | 2007-05-15 | 2008-04-08 | 삼성물산 주식회사 | Temporary structure and precast concrete beam of pylon setting method using the bracket |
| JP4949202B2 (en) * | 2007-10-31 | 2012-06-06 | 三井住友建設株式会社 | Bridge erection method |
| US8522381B1 (en) * | 2010-09-07 | 2013-09-03 | OCCI, Inc. | System and method for bridge pier replacement |
| CN103469735B (en) * | 2013-09-26 | 2015-11-04 | 中南大学 | The mounting method of curve ultrahigh hollow column plate type pier top solid section template |
| CN109629449B (en) * | 2019-01-29 | 2020-07-17 | 中铁大桥局集团有限公司 | Mounting and positioning support and alignment method for steel-concrete combined section of arch foot of steel box arch bridge |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0235950Y2 (en) * | 1985-05-23 | 1990-10-01 |
-
1988
- 1988-05-16 JP JP63119037A patent/JP2632922B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194982A (en) * | 2013-03-25 | 2013-07-10 | 中交路桥建设有限公司 | Construction method for short cantilever support at bridge side span cast-in-situ segment |
| CN103194982B (en) * | 2013-03-25 | 2015-02-25 | 中交路桥建设有限公司 | Construction method for short cantilever support at bridge side span cast-in-situ segment |
| CN107130520A (en) * | 2017-05-26 | 2017-09-05 | 中建五局第三建设有限公司 | A kind of Bailey bracket double-layer double-direction arranges high-formwork construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01290806A (en) | 1989-11-22 |
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