JP2004124375A

JP2004124375A - Construction method for composite floor panel

Info

Publication number: JP2004124375A
Application number: JP2002285752A
Authority: JP
Inventors: Toshiyuki Nakagawa; 中川　敏之; Mamoru Izawa; 井澤　衞; Yoichi Kobayashi; 小林　洋一; Takashi Kamijo; 上條　崇
Original assignee: Sumitomo Metal Industries Ltd
Current assignee: Nippon Steel Corp
Priority date: 2002-09-30
Filing date: 2002-09-30
Publication date: 2004-04-22
Anticipated expiration: 2022-09-30
Also published as: JP3997876B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction method for a composite floor panel enabling the joining work of a floor panel from a lower face for conventional work from a bridge face, to solve problems of traffic regulations and the prolongation of a construction term. <P>SOLUTION: The floor system panel constituting the composite floor panel is composed of an upper steel plate 1, a plurality of section steels 2 arranged in parallel at required intervals on the lower face of the upper steel plate 1, and a bottom steel plate 3 connecting the section steels 2 to one another to cope with a short-term traffic load by only a steel hull. A plurality of bolt holes 9 are formed in a joint plate 5 at the end of the floor system panel in advance. A bolt 6 is attached to the bolt hole 9 from an opening formed on the bottom face side of the floor panel on a main girder 15 supporting the end of the floor system panel and is tightened with a nut to join the floor panels. Then, a haunch member 4 is attached between the upper part of the main girder 15 and the bottom steel plate 3 of the floor panel from below to block the opening, and a filler is filled into the floor panel. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本願発明は、主構造を鋼製部材からなる鋼殻で構成し、内部に充填材を充填した複合床版の施工方法、特に鋼殻としての床版パネルの主桁位置での固定方法に関するものであり、例えば橋梁等の床版取替えに適する。
【０００２】
【従来の技術】
橋梁等の床版には、従来から鉄筋コンクリート床版が多く用いられているが、近年の自動車輪荷重の増大や交通量の増大に伴って、老朽化した鉄筋コンクリート床版の損傷事例が増えており、維持、管理上の問題となっている。
【０００３】
損傷を受けた鉄筋コンクリート床版の修復方法としては、従来、以下のような方法が採られている。
（１）　床版コンクリートのひび割れへの樹脂注入による補修。
（２）　縦桁増設や鋼板接着による補強。
（３）　鉄筋コンクリート床版の打換え。
（４）　他形式床版（プレキャスト床版、鋼床版、合成床版など）への取替え。
【０００４】
上記（１）　の方法は、床版の損傷が比較的軽微な場合に用いられる方法で、ひび割れに樹脂注入することで、床版の水密性を増し、コンクリートおよび鉄筋の劣化を防ぐ効果がある。
【０００５】
上記（２）　の方法は、損傷した床版を補強することで、活荷重によって床版に作用する曲げモーメントを減少させたり、床版の抵抗力を増したりする方法であり、一旦、損傷した床版に対して、その後の損傷の進行をくい止めたり、遅らせたりする効果が期待できる。
【０００６】
しかし、（１）　、（２）　の方法は既に損傷を受けた床版に対する対処法であるため、補修、補強後も床版の劣化が進行して再補修が必要になったり、また、損傷が著しい床版に対しては適用できないといった問題点がある。
【０００７】
一方、上記（３）　、（４）　の方法のように、既設床版を取り壊してから床版を打換えたり、取替えたりする方法では、床版が新しく健全なものに置き換わるので、損傷が著しい場合、既設床版に施工不良がある場合、交通の増大によって既設床版の耐荷力が不足している場合など、様々な状況に対応することができる。
【０００８】
しかし、上記（３）　の方法では工事期間中、コンクリート打設のために交通の全面通行止めまたは車線規制を行わなければならず、打設したコンクリートが硬化するまでの間、振動や衝撃を与えないようにする必要があり、施工工期と交通規制期間が長期化するという問題、既設床版の耐荷力不足を補うためには床版厚さを大きくする必要があり、床版を支える桁への負荷が増大するなどの問題点がある。
【０００９】
これに対して上記（４）　の方法では、鋼床版や鋼・コンクリート合成床版など、床版厚さが鉄筋コンクリート床版と同程度でも鉄筋コンクリート床版よりも耐荷性能の高い床版を用いることができるので、桁への負荷を増大させることなく既設床版の耐荷力不足にも十分対応可能である。
【００１０】
このような床版としては、例えば特許文献１記載の複合床版がある。この複合床版では、図６に示すように、主構造を底鋼板３と、底鋼板３の上面に所要間隔で並列配置した複数本の形鋼２と、隣接する形鋼２間に架け渡した上鋼板１で構成し、上鋼板１と底鋼板３との間に形成される中空部内に補強材または補剛材としての充填材１４が充填されている。
【００１１】
この複合床版は鋼製部材の製作を工場で行うので架設現場における作業の効率化が図られ、さらに、充填材として高流動コンクリートなどを現場打設する場合には、運搬、架設する段階では重量が小さく、取り扱いが容易であるといった利点があり、取替え工事にも対応できる床版である。
【００１２】
また、このような複合床版を橋梁等の新設構造物に適用する場合に、床版パネルの長さが大きくなると、輸送・運搬可能なサイズの制約上、床版パネルを橋軸方向に分割して、図８に示すような添接板１３を用いたボルト接合による縦継手構造を設けることで、輸送可能なサイズに分割して輸送し、現場架設時に床版パネルどうしを連結する方法がある。
【００１３】
【特許文献１】
特許第３１９１５６９号公報
【００１４】
【発明が解決しようとする課題】
上述の特許文献１記載の複合床版は、他形式の床版に比べて床版取替え工事に適用するのに都合がよいものの、底鋼板、形鋼、および上鋼板からなる鋼殻を桁上に架設した後、鋼殻継手部の施工、充填材の施工を床版上面から行うので、この期間は橋面上の交通規制が必要であるという問題点が残されている。
【００１５】
本願発明は、以上のような課題の解決を図ったものであり、橋梁等の床版取替え工事において重視される交通規制や工期の長期化の問題を解決することができる複合床版の施工方法を提供することを目的としたものである。
【００１６】
【課題を解決するための手段】
本願の請求項１に係る発明は、床版を構成する鋼殻内に充填材が充填されてなる複合床版の施工方法であって、上鋼板と、前記上鋼板の下面に所要間隔をおいて並列配置された複数本の形鋼と、前記形鋼間をつなぐ底鋼板とを有する床版パネルどうしを、該床版パネルの端部を支持する主桁上で連結する際に、あらかじめ前記床版パネル端部の継手板に複数のボルト孔を設けておき、該床版パネルの底面側に形成された開口部から前記ボルト孔にボルトを取り付けて床版パネルどうしを接合し、その後、前記主桁上部と前記床版パネルの底鋼板間にハンチ部材を取り付けて前記開口部を閉塞し、床版パネル内に充填材を充填することを特徴とするものである。
【００１７】
すなわち、請求項１に係る発明は、床版パネルを連結して行く場合に、連結作業を全て下側から行なえるように、ハンチ部の構造について、鋼板等からなるハンチ部材を下面側から取付け可能な方式とすることで、ハンチ部材を取り付ける前の状態において、床版パネルの継手板連結を下面側から行うための作業スペースが確保でき、作業を下から行うことで、複合床版パネル上面側を仮供用させることができる。
【００１８】
なお、継手部は複合床版パネルの架設時のコンクリート等の充填材が未充填の状態および供用時のコンクリートなどの充填材が鋼殻内に充填された状態で、所要の設計荷重に耐え得るように引張ボルト接合とすることが望ましい。
【００１９】
また、この場合、橋軸直角方向の寸法誤差を吸収する必要がある場合は、継手板間にフィラーフプレートを設置するのが望ましい。
【００２０】
上鋼板の下面に配置される形鋼としては、例えば、Ｔ形鋼、Ｈ形鋼、溝形鋼等を用いることができ、通常、工場等で形鋼の上下縁または上下フランジを溶接等により上下鋼板に接合する。
【００２１】
充填材としては、コンクリート、発泡コンクリート、軽量コンクリート、ウレタンなどの材料が使用可能であり、対象となる複合床版が必要とする強度、剛性、桁等の支持構造体の耐荷力から決まる床版重量の制約、建設コストの制約等に応じて充填材を選ぶ。
【００２２】
例えば、本願発明の複合床版の施工方法を道路橋などの橋梁の床版取替工事に用いる場合、架設時期が古い既設橋梁では、設計荷重が現行のものより小さいため、既設床版の厚さが薄く、桁の耐荷性能の余裕が小さいことが多いが、このような床版の取替えに際しては、充填材は軽量なものが良い。
【００２３】
また、床版取替工事では、既存交通への影響を極力小さくする必要があるので、工事機材や施工機械のために十分なスペースが確保できないことが多い。このため、床版は比較的小さく、かつ、軽量なパネルに分割して現場に搬入する必要があるが、結果としてパネル間継手の箇所が増え、施工に時間がかかる。
【００２４】
従来の床版では、このパネル間の継手の施工を床版上面から行っていたため、この間の交通規制が長期化するという問題があった。これに対して、本願発明の複合床版では所要の強度を有する鋼殻を用いることで、パネル間の継手や充填材を施工する以前であっても、鋼殻の疲労損傷が問題にならない短期間であれば橋面の交通開放が可能であり、交通開放しながら継手、充填材の施工を行うことで、交通規制期間の大幅な短縮を図ることができる。
【００２５】
本願の請求項２に係る発明は、床版を構成する鋼殻内に充填材が充填されてなる複合床版の施工方法であって、上鋼板と、前記上鋼板の下面に所要間隔をおいて並列配置された複数本の形鋼と、前記形鋼間をつなぐ底鋼板とを有する鋼殻からなる床版パネルどうしを、該床版パネルの端部を支持する主桁上で連結する際に、あらかじめ前記床版パネル端部の上鋼板に複数のボルト孔を設けておき、隣接する床版パネルの上鋼板どうしを、該床版パネルの底面側に形成された開口部から前記上鋼板のボルト孔と対応する位置にボルト孔を有する添接板を介してボルト接合し、その後、前記主桁上部と前記床版パネルの底鋼板間にハンチ部材を取り付けて前記開口部を閉塞し、床版パネル内に充填材を充填することを特徴とするものである。
【００２６】
ボルトは、例えば上鋼板のボルト孔にボルトの頭が上になるように貫通させて取り付けておき、床版パネルの架設後、ハンチ部材を取り付ける前に、底鋼板のボルト孔に対応させて所定間隔でボルト孔を設けた添接板を隣接する床版パネルの上鋼板間にわたってそれらの下面側に設置し、添接板のボルト孔に通したボルトを下面側からナット締めすることができる。あるいは、ワンサイドボルト等を使用して下から接合することもできる。
【００２７】
連結作業を下側から行うことができる効果は、請求項１に係る発明の場合と同様である。
【００２８】
なお、添接板を用いた上鋼板どうしの接合部は、床版パネル架設時の充填材が未充填の状態または供用時の充填材が鋼殻内に充填された状態で、所要の設計荷重に耐え得るように摩擦ボルト接合とするのが望ましい。
【００２９】
本願の請求項３に係る発明は、床版を構成する鋼殻内に充填材が充填されてなる複合床版の施工方法であって、上鋼板と、前記上鋼板の下面に所要間隔をおいて並列配置された複数本の形鋼と、前記形鋼間をつなぐ底鋼板とを有する鋼殻からなる床版パネルどうしを、該床版パネルの端部を支持する主桁上で連結する際に、あらかじめ前記床版パネルの下面側と前記主桁の上面側の対向する位置に、それぞれ複数のボルト孔を有する連結用鋼材を取り付けておき、該床版パネルの下面側において前記連結用鋼材のボルト孔どうしを合わせてボルト接合し、その後、前記主桁上部と前記床版パネルの底鋼板間にハンチ部材を取り付けて前記開口部を閉塞し、床版パネル内に充填材を充填することを特徴とするものである。
【００３０】
床版パネル側の連結用鋼材は、床版パネルの工場製作時に溶接等で取り付けることができるが、寸法誤差を吸収するためボルト孔を大きくしてボルトで取り付けることもできる。連結用鋼材としては、アングル等の形鋼を用いることができるが、必要な強度が得られるものであれば、特に形状や材質は限定されない。
【００３１】
請求項４は、請求項１、２または３に係る複合床版の施工方法において、前記ハンチ部材の前記床版パネルの底鋼板への取付けを、前記底鋼板とハンチ部材どうしの取付け位置に設けたボルト孔に通したボルトをハンチ部材の下側から締め込んで行うことを特徴とするものである。
【００３２】
この場合も、ボルトは、例えば床版パネルの底鋼板のボルト孔にボルトの頭が上になるように貫通させて取り付けておき、ハンチ部材の対応する位置に設けたボルト孔に通し、ナット締めすることで、下からの取り付け作業が容易となる。あるいは、ワンサイドボルト等を使用して下から接合することもできる。
【００３３】
【発明の実施の形態】
図１は、本願の請求項１に係る複合床版の施工方法の一実施形態を示したものである。
【００３４】
床版パネルは、図６に示された複合床版と同様、上鋼板１と、上鋼板１の下面に所要間隔（必ずしも一定の間隔である必要はない。他の箇所についても同様。）をおいて並列に配置した複数本の形鋼２と、隣接する形鋼２間に架け渡した底鋼板３とで構成される鋼殻からなり、上鋼板１と底鋼板３の間に形成される中空部にコンクリート等の充填材が充填される。
【００３５】
この例では、主桁１５への架設位置において、床版パネルの端部にボルト孔９を有する継手板５が設けられており、また架設位置については床版パネルの底鋼板３がなく開口部を形成している。
【００３６】
床版パネルの架設後に、ボルト孔９に例えばトルシア形ボルト６（普通のボルトでもよい）を貫通させ、ハンチ部材４がない状態で、かつ床版パネルの端部が開口した状態で、床版パネルの下面側からナット１０を締結する。
【００３７】
なお、上鋼板１の荷重伝達においては、継手板５の板厚はボルト６の直径以上とする場合がある。
【００３８】
図２は、本願の請求項１に係る複合床版の施工方法の他の実施形態を示したもので、図１の実施形態では継手板５が床版パネルの全厚に相当する幅（高さ方向）を有していたのに対し、図２の実施形態では継手板５が床版パネルの厚さの約半分であり、下方に底鋼板３位置の開口部に連続する開口を形成している。
【００３９】
この場合は開口部が大きい分、コンクリート等の充填材の充填が容易となる。
【００４０】
図３は、本願の請求項２に係る複合床版の施工方法の一実施形態を示したものであり、本実施形態では、上鋼板１の連結部に所定間隔をおいてボルト孔９を設け、床版パネルの架設前に上鋼板１のボルト孔９にボルト６の頭が上になるように貫通させておく。
【００４１】
床版パネルの架設後、鋼板製のハンチ部材４を取り付ける前に、上鋼板１のボルト孔９に対応させて所定間隔でボルト孔９を設けた添接板１３を隣接する床版パネルの上鋼板１間の下面側に架け渡し、ボルト６を添接板１３のボルト孔に貫通させ、添接板１３の下面側からナットで締結する。
【００４２】
図４は、本願の請求項３に係る複合床版の施工方法の一実施形態を示したものであり、本実施形態では、主桁１５側に取り付けた鋼板からなる連結鋼材７と、床版パネル側に取り付けたアングルからなる連結鋼材８にボルト孔９を設け、床版パネルの連結前に、主桁１５側の連結鋼材７および床版パネル側の連結鋼材８のボルト孔にボルト６の頭が内側になるように貫通させて、外側からナットで締結する。
【００４３】
なお、図１〜３の実施形態においても、主桁１５への床版パネルの固定については、連結鋼材７，８を用い、同様の接合構造を形成している。
【００４４】
また、本実施形態における連結鋼材７、８のボルト孔９は一方を縦の長孔、他方を横の長孔とし、位置ずれの誤差を吸収できるようにしている。
【００４５】
図５は、本願の請求項４に係る複合床版の施工方法の一実施形態を示したもので、本実施形態では、底鋼板３およびハンチ部材４にボルト孔９を設け、主桁１５への床版パネルの固定後に、底鋼板３のボルト孔９にボルト６を頭が上になるように貫通させて、前記ボルトを所定間隔でボルト孔９を設けたハンチ部材４に貫通させてハンチ部材４の下面側からナットで締結する。
【００４６】
【発明の効果】
本願発明の複合床版の施工方法によれば、床版パネルどうしの連結、主桁との固定等を、床版パネルの下面側から行うことができるため、床版パネル架設後には床版パネルの上面を仮供用することができ、道路橋などに適用した場合においては、施工中に橋面上を交通解放できるので、工事に伴う渋滞の発生などの不便を解消することができる。
【００４７】
本願発明で用いる床版パネルは構成部材が少なく、工場製作の合理化が図られ、橋梁の床版取替え工事における架設現場等の作業の効率化が図られる。
【図面の簡単な説明】
【図１】本願の請求項１に係る複合床版の施工方法の一実施形態を示したもので、（ａ）　は橋軸方向と直角な断面図、（ｂ）　はそのＡ−Ａ断面図である。
【図２】本願の請求項１に係る複合床版の施工方法の他の実施形態を示したもので、（ａ）　は橋軸方向と直角な断面図、（ｂ）　はそのＢ−Ｂ断面図である。
【図３】本願の請求項２に係る複合床版の施工方法の一実施形態を示したもので、（ａ）　は橋軸方向と直角な断面図、（ｂ）　はそのＣ−Ｃ断面図である。
【図４】本願の請求項３に係る複合床版の施工方法の一実施形態を示したもので、（ａ）　は橋軸方向と直角な断面図、（ｂ）　はそのＤ−Ｄ断面図である。
【図５】本願の請求項４に係る複合床版の施工方法の一実施形態を示したもので、（ａ）　は橋軸方向と直角な断面図、（ｂ）　はそのＥ−Ｅ断面図である。
【図６】本願発明が適用される複合床版の概要を示す斜視図である。
【図７】従来の複合床版（特許文献１参照）の構造例を示す斜視図である。
【図８】新設橋における従来の複合床版パネルの縦継手構造の一例を示したもので、（ａ）　は橋軸方向と直角な断面図、（ｂ）　は橋軸方向の断面図である。
【符号の説明】
１…上鋼板、２…形鋼、３…底鋼板、４…ハンチ部材、５…継手板、６…ボルト、７…主桁側連結用鋼材、８…床版パネル側連結用鋼材、９…ボルト孔、１０…ナット、１１…主桁上フランジ、１２…締込み治具、１３…添接板、１４…充填材、１５…主桁、１６…ハンチ部材、１７…スタッド[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method of constructing a composite slab in which a main structure is constituted of a steel shell made of a steel member and filled with a filler therein, and particularly to a method of fixing a slab panel as a steel shell at a main girder position. For example, it is suitable for replacing a floor slab of a bridge or the like.
[0002]
[Prior art]
Conventionally, reinforced concrete slabs have been used for decks such as bridges, but with the increase in automobile wheel load and traffic volume in recent years, the number of damaged cases of aging reinforced concrete slabs has increased. , Maintenance and management issues.
[0003]
As a method of repairing a damaged reinforced concrete slab, the following method has conventionally been adopted.
(1) Repair of cracks in floor slab concrete by injecting resin.
(2) Reinforcement by adding stringers and bonding steel plates.
(3) Replacement of reinforced concrete floor slabs.
(4) Replacement with another type of slab (precast slab, steel slab, composite slab, etc.).
[0004]
The method (1) is used when the damage to the floor slab is relatively small, and has an effect of increasing the watertightness of the floor slab and preventing deterioration of concrete and reinforcing steel by injecting resin into cracks. .
[0005]
The method (2) is a method of reducing the bending moment acting on the floor slab by the live load or increasing the resistance of the floor slab by reinforcing the damaged floor slab. The effect of stopping or delaying the progress of subsequent damage to the floor slab can be expected.
[0006]
However, since the methods (1) and (2) are measures for a slab that has already been damaged, the slab will deteriorate even after repair and reinforcement, and it will be necessary to repair it again. However, there is a problem that the method cannot be applied to a floor slab having a remarkable effect.
[0007]
On the other hand, in the methods of (3) and (4) above, in which the existing slabs are demolished and then the slabs are replaced or replaced, the slabs are replaced with new and healthy ones. In this case, it is possible to cope with various situations such as a case where the existing slab has a poor construction, a case where the load capacity of the existing slab is insufficient due to an increase in traffic.
[0008]
However, in the above method (3), during the construction period, all traffic must be closed or traffic lanes must be restricted in order to cast concrete, and no vibration or impact is applied until the cast concrete hardens. In order to compensate for the shortage of the load-carrying capacity of the existing slab, the thickness of the slab needs to be increased. There are problems such as an increase in load.
[0009]
On the other hand, in the above method (4), using a slab such as a steel slab or a steel / concrete composite slab having a load carrying capacity higher than that of the reinforced concrete slab even if the slab thickness is the same as that of the reinforced concrete slab. Therefore, it is possible to sufficiently cope with insufficient load-bearing capacity of the existing slab without increasing the load on the girder.
[0010]
As such a slab, there is, for example, a composite slab described in Patent Document 1. In this composite slab, as shown in FIG. 6, the main structure is a bottom steel plate 3, a plurality of shaped steel bars 2 arranged in parallel on a top surface of the bottom steel plate 3 at required intervals, and bridged between adjacent shaped steel bars 2. A filler 14 as a reinforcing material or a stiffening material is filled in a hollow portion formed between the upper steel plate 1 and the bottom steel plate 3.
[0011]
Since this composite slab makes steel members at the factory, work efficiency at the erection site is improved.Furthermore, when casting high-fluid concrete or the like as a filler, on-site transportation and erection are required. The floor slab has the advantages of low weight and easy handling, and can be used for replacement work.
[0012]
In addition, when applying such a composite slab to a new structure such as a bridge, if the length of the slab panel becomes large, the slab panel is divided in the bridge axis direction due to restrictions on the size that can be transported. Then, by providing a vertical joint structure by bolt joining using the attachment plate 13 as shown in FIG. 8, a method of transporting by dividing into a transportable size and connecting floor slab panels at the time of site construction is known. is there.
[0013]
[Patent Document 1]
Japanese Patent No. 3191569
[Problems to be solved by the invention]
Although the composite slab described in Patent Document 1 described above is more convenient to apply to slab replacement work than other types of slabs, a steel shell composed of a bottom steel plate, a shaped steel plate, and an upper steel plate is placed on a girder. Since the construction of the steel shell joint and the filling material are performed from the upper surface of the floor slab after erection, the problem that traffic regulation on the bridge surface is required during this period remains.
[0015]
The invention of the present application is intended to solve the above problems, and a method of constructing a composite slab capable of solving the problems of traffic regulation and prolonging the construction period which are emphasized in the slab replacement work for bridges and the like. The purpose is to provide.
[0016]
[Means for Solving the Problems]
The invention according to claim 1 of the present application is a method for constructing a composite slab in which a filler is filled in a steel shell constituting a slab, wherein a required interval is provided between an upper steel plate and a lower surface of the upper steel plate. When the floor slab panels each having a plurality of section steels arranged in parallel and a bottom steel plate connecting the section steels are connected to each other on a main girder supporting an end of the floor slab panels, A plurality of bolt holes are provided in the joint plate at the end of the floor slab panel, and bolts are attached to the bolt holes from the openings formed on the bottom side of the floor slab panel to join the floor slab panels together. A haunch member is attached between the upper part of the main girder and the bottom steel plate of the floor slab panel to close the opening, and the floor slab panel is filled with a filler.
[0017]
In other words, the invention according to claim 1 has a haunch member structure made of a steel plate or the like attached from the lower surface side so that when the floor slab panels are joined, the joining operation can be performed entirely from below. By using a possible method, a work space for connecting the joint plate of the floor slab panel from the lower surface side can be secured in a state before the haunch member is attached, and by performing the work from below, the upper surface of the composite slab panel can be obtained. The side can be temporarily put in service.
[0018]
The joint part can withstand the required design load in a state where the filler such as concrete is not filled when the composite floor panel is erected and in a state where the filler such as concrete is filled in the steel shell during operation. Thus, it is desirable to use a tension bolt joint.
[0019]
In this case, if it is necessary to absorb a dimensional error in the direction perpendicular to the bridge axis, it is desirable to install a filler plate between the joint plates.
[0020]
As the section steel disposed on the lower surface of the upper steel sheet, for example, a T section steel, an H section steel, a channel section steel, etc. can be used. Usually, the upper and lower edges or the upper and lower flanges of the section steel are welded at a factory or the like. Join to upper and lower steel plates.
[0021]
Materials such as concrete, foamed concrete, lightweight concrete, and urethane can be used as the filler, and the floor slab is determined by the load-bearing capacity of the supporting structure such as the strength, rigidity, and girder required by the target composite slab. The filler is selected according to the restrictions on weight and construction costs.
[0022]
For example, when the method of constructing a composite slab according to the present invention is used for slab replacement work of a bridge such as a road bridge, the design load of an existing bridge with an earlier erection time is smaller than that of a current one, so the thickness of the existing slab is large. Although the thickness is small and the margin of the load carrying capacity of the girder is small in many cases, when such a floor slab is replaced, a lightweight filler is preferable.
[0023]
In addition, in the slab replacement work, it is necessary to minimize the effect on existing traffic, so that it is often difficult to secure sufficient space for construction equipment and machines. For this reason, it is necessary to divide the floor slab into relatively small and lightweight panels and carry the panels to the site, but as a result, the number of joints between panels increases, and it takes time for construction.
[0024]
In the conventional floor slab, since the joint between the panels is constructed from the upper surface of the floor slab, there is a problem that the traffic regulation during this period is prolonged. In contrast, the composite slab of the present invention uses a steel shell having the required strength, so that even before the joints and fillers between panels are constructed, fatigue damage of the steel shell does not cause a problem in a short term. Between the bridges, it is possible to open the traffic on the bridge surface, and by performing the joints and filling materials while the traffic is open, the traffic control period can be significantly reduced.
[0025]
The invention according to claim 2 of the present application is a method of constructing a composite slab in which a filler is filled in a steel shell constituting the slab, wherein a required interval is provided between an upper steel plate and a lower surface of the upper steel plate. When connecting floor slab panels each formed of a steel shell having a plurality of shaped steel bars arranged in parallel and a bottom steel plate connecting the shaped steel bars on a main girder supporting an end of the floor slab panels. A plurality of bolt holes are provided in the upper steel plate at the end of the floor slab panel in advance, and the upper steel plates of the adjacent floor slab panels are separated from each other through the opening formed on the bottom side of the floor slab panel. Bolted via a contact plate having a bolt hole at a position corresponding to the bolt hole, and thereafter, a haunch member is attached between the main girder upper part and the bottom steel plate of the floor slab panel to close the opening, The present invention is characterized in that a flooring panel is filled with a filler.
[0026]
For example, the bolts are installed by penetrating the bolt holes of the upper steel plate so that the heads of the bolts are directed upward, and after erection of the floor slab panel, before mounting the haunch member, predetermined bolts corresponding to the bolt holes of the bottom steel plate. The contact plates provided with bolt holes at intervals can be installed on the lower surface side of the upper slab panel between the upper steel plates, and the bolts passed through the bolt holes of the contact plate can be tightened with nuts from the lower surface side. Alternatively, it can be joined from below using a one-side bolt or the like.
[0027]
The effect that the connecting operation can be performed from the lower side is the same as that of the invention according to claim 1.
[0028]
The joints between the upper steel plates using the contact plate should be filled with the required design load when the filler is not filled when the slab panel is erected or when the filler is filled in the shell during operation. It is desirable to use a friction bolt joint so as to be able to endure.
[0029]
The invention according to claim 3 of the present application is a method for constructing a composite slab in which a filler is filled in a steel shell constituting the slab, wherein a required interval is provided between an upper steel plate and a lower surface of the upper steel plate. When connecting floor slab panels each formed of a steel shell having a plurality of shaped steel bars arranged in parallel and a bottom steel plate connecting the shaped steel bars on a main girder supporting an end of the floor slab panels. A connecting steel material having a plurality of bolt holes, respectively, is attached to a lower surface side of the floor slab panel and an upper surface side of the main girder in advance, and the connecting steel material is provided on the lower surface side of the floor slab panel. The bolt holes are aligned and bolted together, and then a haunch member is attached between the upper part of the main girder and the bottom steel plate of the floor slab panel to close the opening and fill the floor slab panel with filler. It is characterized by the following.
[0030]
The connecting steel material on the floor slab panel side can be attached by welding or the like when the floor slab panel is manufactured at the factory, but can also be attached with bolts with large bolt holes to absorb dimensional errors. As the connecting steel material, a shape steel such as an angle can be used, but the shape and the material are not particularly limited as long as the required strength is obtained.
[0031]
According to a fourth aspect of the present invention, in the method of constructing a composite slab according to the first, second or third aspect, the haunch member is attached to a bottom steel plate of the floor slab panel at an attachment position between the bottom steel plate and the haunch member. A bolt passed through the bolt hole is tightened from below the haunch member.
[0032]
Also in this case, the bolts are attached by, for example, penetrating the bolt holes of the bottom steel plate of the floor slab panel so that the heads of the bolts face up, and passing the bolts through the bolt holes provided at the corresponding positions of the haunch member, and tightening the nuts. By doing so, mounting work from below becomes easy. Alternatively, it can be joined from below using a one-side bolt or the like.
[0033]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows an embodiment of a method for constructing a composite floor slab according to claim 1 of the present application.
[0034]
Similar to the composite slab shown in FIG. 6, the floor slab panel has a required interval (it is not necessarily required to be a constant interval) between the upper steel plate 1 and the lower surface of the upper steel plate 1. The same applies to other portions. A steel shell composed of a plurality of shaped steel plates 2 arranged in parallel and a bottom steel plate 3 bridged between adjacent shaped steel bars 2, formed between the upper steel plate 1 and the bottom steel plate 3. The hollow portion is filled with a filler such as concrete.
[0035]
In this example, a joint plate 5 having a bolt hole 9 is provided at an end of the floor slab panel at a position where the floor slab is installed on the main girder 15. Is formed.
[0036]
After the installation of the floor slab panel, for example, a torcia-shaped bolt 6 (or an ordinary bolt) may be passed through the bolt hole 9, and the floor slab may be opened without the haunch member 4 and with the end of the floor slab panel opened. The nut 10 is fastened from the lower surface side of the panel.
[0037]
In the load transmission of the upper steel plate 1, the thickness of the joint plate 5 may be equal to or larger than the diameter of the bolt 6.
[0038]
FIG. 2 shows another embodiment of the method of constructing a composite slab according to claim 1 of the present application. In the embodiment of FIG. 1, the joint plate 5 has a width (high) corresponding to the entire thickness of the slab panel. In the embodiment of FIG. 2, the joint plate 5 is about half the thickness of the floor slab panel, and forms an opening below the bottom plate 3 at the opening at the position of the bottom steel plate 3. ing.
[0039]
In this case, since the opening is large, the filling of the filler such as concrete becomes easy.
[0040]
FIG. 3 shows an embodiment of a method of constructing a composite floor slab according to claim 2 of the present application. In this embodiment, bolt holes 9 are provided at predetermined intervals in a connecting portion of the upper steel plate 1. Before the installation of the floor slab panel, the bolt 6 is passed through the bolt hole 9 of the upper steel plate 1 so that the head of the bolt 6 faces upward.
[0041]
After the slab panel is erected, before attaching the haunch member 4 made of steel plate, the adjoining plate 13 provided with the bolt holes 9 at predetermined intervals corresponding to the bolt holes 9 of the upper steel plate 1 is placed on the adjacent slab panel. The bolt 6 is passed over the lower surface between the steel plates 1, the bolt 6 is passed through the bolt hole of the attachment plate 13, and fastened with a nut from the lower surface of the attachment plate 13.
[0042]
FIG. 4 shows an embodiment of a method of constructing a composite floor slab according to claim 3 of the present application. In this embodiment, a connecting steel member 7 made of a steel plate attached to the main girder 15 and a floor slab A bolt hole 9 is provided in the connecting steel member 8 made of an angle attached to the panel side, and before connecting the floor slab panel, the bolt 6 is inserted into the bolt hole of the connecting steel member 7 on the main girder 15 side and the connecting steel member 8 on the floor slab panel side. Penetrate so that the head is inside, and fasten with a nut from the outside.
[0043]
In addition, in the embodiment of FIGS. 1 to 3 as well, for fixing the floor slab panel to the main girder 15, the same joining structure is formed using the connecting steel members 7 and 8.
[0044]
Further, one of the bolt holes 9 of the connecting steel members 7 and 8 in the present embodiment is a vertically long hole and the other is a horizontally long hole, so that an error in displacement can be absorbed.
[0045]
FIG. 5 shows an embodiment of a method of constructing a composite floor slab according to claim 4 of the present application. In this embodiment, a bolt hole 9 is provided in the bottom steel plate 3 and the haunch member 4, and After the floor slab panel is fixed, the bolts 6 are passed through the bolt holes 9 of the bottom steel plate 3 so that their heads face upward, and the bolts are passed through the haunch member 4 provided with the bolt holes 9 at predetermined intervals. The member 4 is fastened with a nut from the lower surface side.
[0046]
【The invention's effect】
According to the method for constructing a composite slab of the present invention, the connection of the slab panels, the fixing to the main girder, and the like can be performed from the lower surface side of the slab panel. Can be temporarily used, and when applied to a road bridge or the like, traffic on the bridge surface can be released during construction, so that inconvenience such as occurrence of traffic congestion due to construction can be eliminated.
[0047]
The floor slab panel used in the present invention has a small number of constituent members, rationalization of factory production is achieved, and efficiency of work at a erection site or the like in bridge slab replacement work is achieved.
[Brief description of the drawings]
FIG. 1 shows an embodiment of a method for constructing a composite floor slab according to claim 1 of the present application, wherein (a) is a sectional view perpendicular to the bridge axis direction, and (b) is an AA sectional view thereof. It is.
FIGS. 2A and 2B show another embodiment of the method of constructing a composite floor slab according to claim 1 of the present application, wherein FIG. 2A is a cross-sectional view perpendicular to the bridge axis direction, and FIG. FIG.
FIG. 3 shows an embodiment of a method for constructing a composite floor slab according to claim 2 of the present application, wherein (a) is a cross-sectional view perpendicular to the bridge axis direction, and (b) is a CC cross-sectional view thereof. It is.
4A and 4B show one embodiment of a method for constructing a composite floor slab according to claim 3 of the present application, wherein FIG. 4A is a cross-sectional view perpendicular to the bridge axis direction, and FIG. It is.
5A and 5B show one embodiment of a method for constructing a composite floor slab according to claim 4 of the present application, wherein FIG. 5A is a cross-sectional view perpendicular to the bridge axis direction, and FIG. It is.
FIG. 6 is a perspective view showing an outline of a composite floor slab to which the present invention is applied.
FIG. 7 is a perspective view showing a structural example of a conventional composite floor slab (see Patent Document 1).
FIG. 8 shows an example of a vertical joint structure of a conventional composite floor slab panel in a new bridge, (a) is a cross-sectional view perpendicular to the bridge axis direction, and (b) is a cross-sectional view in the bridge axis direction. .
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Top steel plate, 2 ... Shape steel, 3 ... Bottom steel plate, 4 ... Hunch member, 5 ... Joint plate, 6 ... Bolt, 7 ... Steel material for main girder side connection, 8 ... Steel material for floor slab panel side connection, 9 ... Bolt hole, 10 nut, 11 upper flange of main girder, 12 fastening jig, 13 attachment plate, 14 filler, 15 main girder, 16 haunch member, 17 stud

Claims

A method for constructing a composite slab in which a filler is filled in a steel shell constituting a slab, comprising: an upper steel plate; and a plurality of shaped steel bars arranged in parallel at a required interval on a lower surface of the upper steel plate. When connecting the slab panels each having a bottom steel plate connecting the section steels to each other on a main girder supporting an end portion of the slab panel, a plurality of joint plates at the end portions of the slab panel are connected in advance. Bolt holes are provided, and bolts are attached to the bolt holes from the openings formed on the bottom side of the floor slab panel to join the floor slab panels together. A method for constructing a composite slab, comprising: attaching a haunch member between bottom steel plates to close the opening, and filling a slab panel with a filler.

A method for constructing a composite slab in which a filler is filled in a steel shell constituting a slab, comprising: an upper steel plate; and a plurality of shaped steel bars arranged in parallel at a required interval on a lower surface of the upper steel plate. When connecting the slab panels made of a steel shell having a bottom steel plate connecting the section steels to each other on a main girder supporting an end portion of the slab panel, the slab panel ends are preliminarily formed. A plurality of bolt holes are provided in the upper steel plate, and the upper steel plates of adjacent slab panels are bolted to positions corresponding to the bolt holes of the upper steel plate from openings formed on the bottom side of the slab panel. Then, a haunch member is attached between the upper part of the main girder and the bottom steel plate of the floor slab panel to close the opening, and a filler is filled in the floor slab panel. A method of constructing a composite floor slab, characterized in that:

A method for constructing a composite slab in which a filler is filled in a steel shell constituting a slab, comprising: an upper steel plate; and a plurality of shaped steel bars arranged in parallel at a required interval on a lower surface of the upper steel plate. When connecting floor slab panels made of a steel shell having a bottom steel plate connecting between the section steels on a main girder supporting an end of the floor slab panel, a lower surface side of the floor slab panel is previously And a connecting steel material having a plurality of bolt holes, respectively, is attached to opposed positions on the upper surface side of the main girder, and the bolt holes of the connecting steel materials are bolted together by aligning the bolt holes of the connecting steel material on the lower surface side of the floor slab panel. And thereafter, mounting a haunch member between the upper part of the main girder and the bottom steel plate of the floor slab panel to close the opening, and filling the floor slab panel with a filler material, wherein .

The mounting of the haunch member to the bottom steel plate of the floor slab panel is performed by tightening a bolt passing through a bolt hole provided at a mounting position between the bottom steel plate and the haunch member from below the haunch member. The method for constructing a composite floor slab according to claim 1, 2, or 3.