JPH08128014A - Knock-off device for bridge girder - Google Patents
Knock-off device for bridge girderInfo
- Publication number
- JPH08128014A JPH08128014A JP26886094A JP26886094A JPH08128014A JP H08128014 A JPH08128014 A JP H08128014A JP 26886094 A JP26886094 A JP 26886094A JP 26886094 A JP26886094 A JP 26886094A JP H08128014 A JPH08128014 A JP H08128014A
- Authority
- JP
- Japan
- Prior art keywords
- bridge girder
- knock
- bridge
- earthquake
- air
- 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.)
- Granted
Links
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、橋桁の免震用のノッ
クオフ装置に関し、特に、橋桁と橋台の間または橋桁相
互の間に位置して、地震時においてこれらの遊間以上の
変位が橋桁に生じた場合に、橋桁端部との衝突により変
形して地震力を緩和する橋桁のノックオフ装置に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a knock-off device for seismic isolation of bridge girders, and more particularly to a knock-off device for seismic isolation of bridge girders. The present invention relates to a knock-off device for a bridge girder that, if it occurs, deforms due to a collision with the end of the girder to mitigate seismic force.
【０００２】[0002]
【従来の技術】例えば道路橋や鉄道橋、その他の各種の
橋梁において、地震力を柔らかく受けとめるための免震
橋梁の構成部材として、ノックオフ装置が開発されてい
る。すなわち、地震力を柔らかく受けとめるためには橋
桁と橋台の間または橋桁相互の間にこれらを衝突させな
いようにできるだけ大きな遊間を設ける必要がある一方
で、単に遊間をあまり大きく採ると、この遊間に取り付
ける伸縮装置が大きくなって経済的でなくなるととも
に、騒音や振動を発生しやすくして管理上の問題を生じ
やすい。したがって、この免震用のノックオフ装置は、
かかる点に鑑み、遊間を単に大きく採ることを避けるべ
く、図３に示すように、遊嵌ｄに隣接して上面に伸縮装
置３０を載置するように設置されるものである。2. Description of the Related Art For example, in a road bridge, a railroad bridge, and various other bridges, a knock-off device has been developed as a component of a seismic isolation bridge for softly receiving seismic force. In other words, in order to receive the seismic force softly, it is necessary to provide as large a clearance as possible between the bridge girder and the abutment or between the bridge girders so that they do not collide, but if the clearance is simply taken too large, it will be installed in this clearance. The expansion and contraction device becomes large and uneconomical, and noise and vibration are likely to occur, which causes management problems. Therefore, this seismic isolation knock-off device
In view of this point, as shown in FIG. 3, the expansion device 30 is installed so as to be mounted on the upper surface adjacent to the loose fitting d in order to avoid simply taking a large gap.
【０００３】そして、この図３に示す従来のノックオフ
装置３０は、例えば橋桁３２と橋台３３との間の遊間ｄ
に隣接して橋桁３２の端面と対向する部分の橋台３３の
端面に配置されたアスファルトによる軟弱層からなり、
地震力の生じない通常の状態においては、上面に載置さ
れた伸縮装置３１を支持して、当該伸縮装置３１によっ
て橋桁３２の温度伸縮等に伴う変位や車輛の走行に伴う
変位等を吸収できるようにするとともに（（ａ）参
照）、地震時において、橋桁３２に、前記遊間ｄ以上の
変位が生じた場合には、橋桁３２の端面の衝突により圧
縮破壊を生じて地震の慣性力による衝撃を緩和するもの
である（（ｂ）参照）。The conventional knock-off device 30 shown in FIG. 3 has a clearance d between a bridge girder 32 and an abutment 33, for example.
Consisting of a soft layer of asphalt placed on the end face of the abutment 33 adjacent to the end face of the bridge girder 32,
In a normal state where no seismic force is generated, the expansion / contraction device 31 mounted on the upper surface is supported, and the expansion / contraction device 31 can absorb the displacement of the bridge girder 32 due to the temperature expansion / contraction or the like or the displacement of the vehicle running. In addition to the above (see (a)), when the displacement of the bridge girder 32 is equal to or more than the clearance d during an earthquake, the end face of the bridge girder collides with each other to cause a compressive failure and an impact due to the inertial force of the earthquake. Is alleviated (see (b)).
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記従
来のアスファルトによる軟弱層からなるノックオフ装置
３０によれば、地震時において当該ノックオフ装置３０
が作動して圧縮破損した後、再度通常の状態に戻すに
は、このノックオフ装置３０をアスファルトを用いて再
構築する必要があり、かかる再構築のための作業に多く
の手間がかかるという問題があった。However, according to the above-mentioned conventional knock-off device 30 composed of a soft layer of asphalt, the knock-off device 30 is affected by an earthquake.
However, in order to return to the normal state again after the operation and compression damage, the knock-off device 30 needs to be rebuilt using asphalt, which requires a lot of time and effort for the rebuilding. there were.
【０００５】また、ノックオフ装置３０を構成するアス
ファルト層は耐候性が小さく、常時の補修及び維持管理
に手間がかかるとともに、伸縮装置３１を取り付けた部
分と橋桁３２の本体部分の舗装面との間に段差が生じや
くす、橋の上面における円滑な走行を妨げる要因となる
惧れがある。Further, the asphalt layer constituting the knock-off device 30 has a small weather resistance, and it takes a lot of time to repair and maintain it at all times. Moreover, the asphalt layer between the part to which the expansion device 31 is attached and the pavement surface of the main part of the bridge girder 32 is required. There is a risk that steps will occur easily and that it will be a factor that hinders smooth running on the upper surface of the bridge.
【０００６】そこで、この発明はかかる従来の課題に着
目してなされたもので、地震時において圧縮変形した後
の復旧作業を容易に行なうことができるとともに、これ
の上面に載置される伸縮装置を安定して支持することの
できる橋桁のノックオフ装置を提供することを目的とす
るものである。Therefore, the present invention has been made in view of such a conventional problem, and it is possible to easily perform the recovery work after being compressed and deformed in the event of an earthquake, and at the same time, the expansion / contraction device mounted on the upper surface thereof. It is an object of the present invention to provide a knock-off device for a bridge girder capable of stably supporting the bridge.
【０００７】[0007]
【課題を解決するための手段】この発明は、上記目的を
達成するためになされたものであって、その要旨は、橋
桁と橋台の間または橋桁相互の間に位置して、地震時に
おいてこれらの間の遊間以上の変位が橋桁に生じた場合
に、橋桁端部との衝突により変形して地震力を緩和する
橋桁の免振用のノックオフ装置であって、該ノックオフ
装置が、橋桁を通過する車輛荷重等に対してその形状を
保持し得る変形強度を有するとともに、地震時における
橋桁との衝突時には内部の空気を排出しつつその形状を
圧縮変化させる可変性を備えた強化ゴム，高分子性膜等
の強化膜構造からなる中空袋体によって構成されること
を特徴とする橋桁のノックオフ装置にある。The present invention has been made to achieve the above object, and its gist is to locate between a bridge girder and an abutment or between bridge girders, and to prevent these from occurring during an earthquake. A knock-off device for vibration isolation of the bridge girder that deforms due to collision with the end of the bridge girder to mitigate the seismic force when displacement of the bridge girder or more occurs between the bridge girder. Reinforced rubber and polymers that have the deformation strength that can maintain their shape against the vehicle load, etc., and have the variability to compress and change the shape while exhausting the internal air when colliding with the bridge girder during an earthquake. A knock-off device for a bridge girder characterized by being configured by a hollow bag body having a reinforced membrane structure such as a flexible membrane.
【０００８】また、この発明の橋桁のノックオフ装置
は、前記強化膜構造からなる中空袋体に、高圧空気を注
入するための注入弁と、所定以上の内圧を受けて動作す
る空気排出用のリリーフ弁とを設けることが好ましい。
なお、この注入弁とリリーフ弁とはそれぞれ別個に設け
てもよく、また、双方の機能を備えた一つの弁部材とし
て設けることもできる。Further, in the knock-off device for a bridge girder of the present invention, an injection valve for injecting high-pressure air into the hollow bag body having the reinforced membrane structure, and a relief for air discharge which operates by receiving an internal pressure of a predetermined value or more. It is preferable to provide a valve.
The injection valve and the relief valve may be provided separately, or may be provided as one valve member having both functions.
【０００９】[0009]
【作用】そして、この発明のノックオフ装置は、内部の
空気を排出しつつその形状を圧縮変化させる可変性を備
えた強固な強化膜構造の中空袋体からなり、通常の状態
ではその形状を保持して伸縮装置及びその上方を通過す
る車輛荷重等を強固に支持するとともに、地震時におい
て、橋桁に遊間以上の変位が生じた場合には、橋桁の端
面の衝突によって前記空気を排出することにより、圧縮
変形を生じて地震の慣性力による衝撃を緩和する。The knock-off device of the present invention comprises a hollow bag having a strong reinforced membrane structure that has the variability of compressing and changing the shape of the air while discharging the air inside, and maintains the shape in a normal state. In addition to firmly supporting the expansion device and the vehicle load passing above it, if the displacement of the bridge girder exceeds the clearance during an earthquake, the air is discharged by the collision of the end faces of the bridge girder. , It causes compressive deformation to mitigate the impact of the inertial force of the earthquake.
【００１０】また、圧縮変形した強化膜構造の中空袋体
は、これの内部に圧縮空気を注入することにより容易に
変形前の形状に復元するので、当該ノックオフ装置の復
旧作業を容易に行うことができる。Further, the hollow bag body having the reinforced membrane structure which has been compressed and deformed can be easily restored to the shape before the deformation by injecting compressed air into the hollow bag body, so that the knock-off device can be easily restored. You can
【００１１】そして、前記強化膜構造からなる中空袋体
には、高圧空気を注入するための注入弁と、所定以上の
内圧を受けて動作する空気排出用のリリーフ弁とを設け
ておけば、ノックオフ装置は圧縮変形を生じて地震の慣
性力による衝撃を緩和する機能を効果的に発揮するとと
もに、ノックオフ装置の復旧作業を迅速に行なうことが
できる。If the hollow bag body having the reinforced membrane structure is provided with an injection valve for injecting high-pressure air and a relief valve for air discharge that operates by receiving an internal pressure of a predetermined value or more, The knock-off device effectively exerts the function of causing compression deformation and mitigating the impact due to the inertial force of the earthquake, and also allows the knock-off device to be quickly restored.
【００１２】[0012]
【実施例】以下、この発明の好適な一実施例を添付図面
を参照しつつ詳細に説明する。図１はこの発明の橋桁の
免震用のノックオフ装置を、橋桁３と橋台１の間のノッ
クオフ装置４として適用した場合の実施例を示す部分破
断斜視図、図２（ａ），（ｂ）は通常時および地震発生
時におけるノックオフ装置４の機能状態を示す部分断面
図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a partially cutaway perspective view showing an embodiment in which the knock-off device for seismic isolation of a bridge girder of the present invention is applied as a knock-off device 4 between a bridge girder 3 and an abutment 1, FIGS. 2 (a) and 2 (b). [Fig. 4] is a partial cross-sectional view showing a functional state of knock-off device 4 at normal times and when an earthquake occurs.
【００１３】図において、橋脚上に設けられた橋台１に
は、支承２を介して橋桁３のノックオフ部（端部）３ａ
が、橋桁３の温度収縮や地震力による変位に伴って摺動
可能に設置されている。In the figure, a knock-off portion (end portion) 3a of a bridge girder 3 is mounted on a bridge abutment 1 provided on a pier via a bearing 2.
However, the bridge girder 3 is installed so that it can slide due to temperature shrinkage and displacement due to seismic force.
【００１４】一方、橋台１の立上部１ａの側端部、すな
わち橋桁３のノックオフ部３ａと対向する端面には、当
該ノックオフ部３ａとの間に遊間ｄをおいてこの実施例
のノックオフ装置４が設けられている。On the other hand, at the side end of the rising portion 1a of the abutment 1, that is, at the end face of the bridge girder 3 facing the knock-off portion 3a, there is a clearance d between the knock-off portion 3a and the knock-off device 4 of this embodiment. Is provided.
【００１５】また、遊間ｄの上方には、この遊間ｄを覆
って、櫛の刃状の伸縮機構を備えた一対のプレートから
なる伸縮装置５が、橋桁３のノックオフ部３ａ及びこれ
と対向する橋台１の立上部１ａ端面に埋め込まれた支持
部材１１によって支持されつつ設置され、橋桁３および
橋台１の上面を連続する面に保持しているるとともに、
この伸縮装置５は、ノックオフ装置４によってその下面
を下方から支持されている。さらに、図中符号Ａは橋台
１，橋桁３の表面に施工されたアスファルト等からなる
舗装である。Further, above the clearance d, an expansion / contraction device 5 composed of a pair of plates having a comb blade-shaped expansion / contraction mechanism is provided so as to cover the clearance d and face the knock-off portion 3a of the bridge girder 3 and this. It is installed while being supported by the support member 11 embedded in the end face of the abutment 1a of the abutment 1, and holds the upper surfaces of the bridge girder 3 and the abutment 1 on a continuous surface,
The expansion / contraction device 5 has its lower surface supported by the knock-off device 4 from below. Further, reference numeral A in the figure is a pavement made of asphalt or the like constructed on the surface of the abutment 1 and the bridge girder 3.
【００１６】そして、この実施例のノックオフ装置４
は、例えば前記立上部１ａのコンクリート中に埋設され
たアンカー部材等を介して、立上部１ａの端面に固定さ
れる、断面Ｌ形の取付け架台６と、これの内方に収容さ
れて支持固定された中空袋体としてのアブソーバ７とに
よって構成されている。Then, the knock-off device 4 of this embodiment
Is a mounting base 6 having an L-shaped cross section, which is fixed to the end face of the rising portion 1a via, for example, an anchor member embedded in the concrete of the rising portion 1a, and is supported and fixed by being accommodated inside thereof. And an absorber 7 as a hollow bag body.
【００１７】ここで、アブソーバ７は、強化膜構造とし
ての高分子性膜構造の外殻からなる中空袋体で、その形
状を保持しつつ伸縮装置５及びその上方を通過する車輛
荷重等を支持するのに十分な強度を有するとともに、こ
の中空袋体７の一側部には適宜の位置に、図１に示すよ
うに、注入弁８およびリリーフ弁９が一体に突設されて
いる。Here, the absorber 7 is a hollow bag made of an outer shell of a polymer membrane structure as a reinforced membrane structure, and while supporting its shape, supports the expansion / contraction device 5 and a vehicle load passing thereabove. The hollow bag 7 has a sufficient strength, and an injection valve 8 and a relief valve 9 are integrally provided on one side of the hollow bag body 7 at appropriate positions as shown in FIG.
【００１８】すなわち、注入弁８は１種の逆止弁であっ
て、この注入弁８を通じてエアコンプレッサなどにより
圧縮空気を注入することによって、アブソーバ７をボッ
クス状に膨脹させてその形状を復元し、上記車輛荷重等
を支持させるようにすることができる。一方、リリーフ
弁９は、橋桁の衝突によりアブソーバ７内の空気の圧力
が過大になったとき、すなわち設計された所定圧以上の
過度の圧力に達した時に、内部の空気を開放する機能を
備えるものである。That is, the injection valve 8 is a check valve of one kind, and by injecting compressed air through the injection valve 8 by an air compressor or the like, the absorber 7 is expanded into a box shape to restore its shape. It is possible to support the vehicle load and the like. On the other hand, the relief valve 9 has a function of releasing the internal air when the pressure of the air inside the absorber 7 becomes excessive due to the collision of the bridge girders, that is, when the pressure exceeds the designed predetermined pressure. It is a thing.
【００１９】以上の構成において、通常の交通荷重によ
る振動や小地震時における橋桁３の微少な変位は、図２
（ａ）に示すように、遊間ｄにより吸収される。また、
アブソーバ７はその形状を強固かつ容易に保持して、伸
縮装置５及びその上方を通過する車輛荷重等を支持す
る。With the above-mentioned structure, a slight displacement of the bridge girder 3 during a vibration due to a normal traffic load or a small earthquake is shown in FIG.
As shown in (a), the space d is absorbed. Also,
The absorber 7 firmly and easily holds its shape, and supports the expansion / contraction device 5 and a vehicle load passing thereabove.
【００２０】また、また地震時において、遊間ｄでは吸
収仕切れない変位が橋桁３に生じた場合には、橋桁３は
その地震時慣性力により橋台１に衝突するまで移動する
が、ノックオフ装置４のアブソーバ７は、図２（ｂ）に
示すように、橋桁３の衝突を受けて内部の空気を排出し
つつ圧縮変形し、衝撃力を橋梁構造の他の箇所に及ぼす
ことなく、地震時慣性力を受けとめてこれを減衰緩和す
る。Further, in the event of an earthquake, when displacement that cannot be completely absorbed by the clearance d occurs in the bridge girder 3, the bridge girder 3 moves until it collides with the abutment 1 due to the inertial force during the earthquake, but the knock-off device 4 As shown in FIG. 2 (b), the absorber 7 is compressed and deformed while receiving the collision of the bridge girder 3 while discharging the internal air, so that the impact force does not affect the other parts of the bridge structure and the inertia force during an earthquake is exerted. Receiving it, it attenuates and relaxes it.
【００２１】そして、地震が終了したら、アブソーバ７
を復元して、ノックオフ装置４及び伸縮装置５をもとの
状態に復旧する必要があるが、この際に、前記注入弁８
を介して、圧縮空気を注入するこにより、アブソーバ７
を容易に元の状態に回復させることができる。After the earthquake, the absorber 7
It is necessary to restore the knock-off device 4 and the telescopic device 5 to the original state by restoring the injection valve 8 at this time.
By injecting compressed air through the
Can be easily restored to its original state.
【００２２】また、ノックオフ装置４のアブソーバ７
は、圧縮空気が充填された中空袋体からなるので、常時
の補修及び維持管理をも容易に行なうことができる。Further, the absorber 7 of the knock-off device 4
Since it consists of a hollow bag filled with compressed air, it can be easily repaired and maintained at all times.
【００２３】なお、前記実施例では橋桁と橋台の間のノ
ックオフ装置としてこの発明を適用した場合について説
明したが、橋桁相互の間のノックオフ装置としてもこの
本発明を適用できることは勿論である。In the above embodiment, the case where the present invention is applied as the knock-off device between the bridge girder and the abutment has been described, but it goes without saying that the present invention can also be applied as a knock-off device between the bridge girders.
【００２４】[0024]
【発明の効果】以上実施例によって詳細に説明したよう
に、この発明にかかる橋桁のノックオフ装置は、内部の
空気を排出しつつその形状を圧縮変化させる可変性を備
えた強固な強化膜構造の中空袋体からなり、通常の状態
ではその形状を保持して伸縮装置及びその上方を通過す
る車輛荷重等を強固に支持するとともに、地震時におい
て、橋桁に遊間以上の変位が生じた場合には、橋桁の端
面の衝突によって前記空気を排出することにより、圧縮
変形を生じて地震の慣性力による衝撃を緩和することが
できるとともに、中空袋体の内部に圧縮空気を注入する
ことにより容易にこれを変形前の形状に復元することが
できるので、当該ノックオフ装置の復旧作業を容易に行
うことができる。As described above in detail with reference to the embodiments, the knock-off device for the bridge girder according to the present invention has a strong reinforced membrane structure having the variability of compressing and changing its shape while discharging the internal air. It consists of a hollow bag, and in its normal state it retains its shape to firmly support the expansion device and the vehicle load passing above it, and in the event of an earthquake, if the bridge girder displaces more than the clearance, By discharging the air by the collision of the end faces of the bridge girder, it is possible to alleviate the shock caused by the inertial force of the earthquake due to the compressive deformation, and it is easy to inject the compressed air into the hollow bag. Since it is possible to restore the shape to the shape before the deformation, it is possible to easily perform the recovery work of the knock-off device.
【００２５】また強化膜構造からなる中空袋体に、高圧
空気を注入するための注入弁と、所定以上の内圧を受け
て動作する空気排出用のリリーフ弁とを設けておけば、
ノックオフ装置は、圧縮変形を生じて地震の慣性力によ
る衝撃を緩和する機能を効果的に発揮するとともに、ノ
ックオフ装置の復旧作業を迅速に行なうことができる。If a hollow bag having a reinforced membrane structure is provided with an injection valve for injecting high-pressure air and an air-exhaust relief valve that operates by receiving an internal pressure higher than a predetermined level,
The knock-off device effectively exerts the function of causing compression deformation and mitigating the impact due to the inertial force of an earthquake, and can quickly perform the recovery work of the knock-off device.
【図１】この発明の橋桁のノックオフ装置を、橋桁と橋
台の間のノックオフ装置として適用した場合の実施例を
示す部分破断斜視図である。FIG. 1 is a partially cutaway perspective view showing an embodiment in which the knock-off device for a bridge girder of the present invention is applied as a knock-off device between a bridge girder and an abutment.
【図２】（ａ），（ｂ）は通常時および地震発生時にお
ける、ノックオフ装置の機能状態を示す部分断面図であ
る。2 (a) and 2 (b) are partial cross-sectional views showing a functional state of a knock-off device at normal times and when an earthquake occurs.
【図３】（ａ），（ｂ）は通常時および地震発生時にお
ける、従来のノックオフ装置の機能状態を示す部分断面
図である。3 (a) and 3 (b) are partial cross-sectional views showing a functional state of a conventional knock-off device at normal times and when an earthquake occurs.
１ 橋台 ３ 橋桁 ３ａ ノックオフ部（端部） ４ ノックオフ装置 ７ アブソーバ（強化膜構造からなる中空袋体） ８ 注入弁 ９ リリーフ弁 1 Abutment 3 Bridge girder 3a Knock-off part (end) 4 Knock-off device 7 Absorber (hollow bag with reinforced membrane structure) 8 Injection valve 9 Relief valve
Claims (2)
置して、地震時においてこれらの間の遊間以上の変位が
橋桁に生じた場合に、橋桁端部との衝突により変形して
地震力を緩和する橋桁の免震用のノックオフ装置であっ
て、該ノックオフ装置が、橋桁を通過する車輛荷重等に
対してその形状を保持し得る変形強度を有するととも
に、地震時における橋桁との衝突時には内部の空気を排
出しつつその形状を圧縮変化させる可変性を備えた強化
膜構造からなる中空袋体によって構成されることを特徴
とする橋桁の免震ノックオフ装置。1. When the bridge girder is located between the bridge girders and abutments or between the bridge girders, and the displacement of the bridge girder or more between them during an earthquake occurs, the bridge girder deforms due to the collision with the end of the girder and the earthquake occurs. A knock-off device for seismic isolation of a bridge girder that alleviates a force, the knock-off device having a deformation strength capable of retaining its shape against a vehicle load passing through the bridge girder, and a collision with the bridge girder during an earthquake. A seismic isolation knock-off device for a bridge girder, which is characterized by being constituted by a hollow bag body having a reinforced membrane structure capable of compressing and changing the shape of the air while at the same time discharging the internal air.
圧空気を注入するための注入弁と、所定以上の内圧を受
けて動作する空気排出用のリリーフ弁とを備えることを
特徴とする橋桁の免震ノックオフ装置。2. The hollow bag body having the reinforced membrane structure includes an injection valve for injecting high-pressure air, and a relief valve for air discharge that operates by receiving an internal pressure of a predetermined value or more. Seismic isolation knock-off device for bridge girders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6268860A JP3011032B2 (en) | 1994-11-01 | 1994-11-01 | Bridge girder knock-off device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6268860A JP3011032B2 (en) | 1994-11-01 | 1994-11-01 | Bridge girder knock-off device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08128014A true JPH08128014A (en) | 1996-05-21 |
| JP3011032B2 JP3011032B2 (en) | 2000-02-21 |
Family
ID=17464277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6268860A Expired - Lifetime JP3011032B2 (en) | 1994-11-01 | 1994-11-01 | Bridge girder knock-off device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3011032B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009191466A (en) * | 2008-02-12 | 2009-08-27 | Kawasaki Heavy Ind Ltd | Steel floor slab bridge reinforcement device using compressed air |
| JP2013124471A (en) * | 2011-12-14 | 2013-06-24 | Kfc Ltd | Repairing method of column support for guardrail |
| JP5259868B1 (en) * | 2012-10-26 | 2013-08-07 | 孝典 佐藤 | Seismic isolation system for structures |
| JP2019019466A (en) * | 2017-07-12 | 2019-02-07 | 東日本高速道路株式会社 | Bridge expansion structure and method of constructing bridge expansion structure |
| JP2021025251A (en) * | 2019-08-01 | 2021-02-22 | 大林道路株式会社 | Extension pavement type expansion device |
-
1994
- 1994-11-01 JP JP6268860A patent/JP3011032B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009191466A (en) * | 2008-02-12 | 2009-08-27 | Kawasaki Heavy Ind Ltd | Steel floor slab bridge reinforcement device using compressed air |
| JP2013124471A (en) * | 2011-12-14 | 2013-06-24 | Kfc Ltd | Repairing method of column support for guardrail |
| JP5259868B1 (en) * | 2012-10-26 | 2013-08-07 | 孝典 佐藤 | Seismic isolation system for structures |
| JP2019019466A (en) * | 2017-07-12 | 2019-02-07 | 東日本高速道路株式会社 | Bridge expansion structure and method of constructing bridge expansion structure |
| JP2021025251A (en) * | 2019-08-01 | 2021-02-22 | 大林道路株式会社 | Extension pavement type expansion device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3011032B2 (en) | 2000-02-21 |
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