JP5683326B2 - Displacement limiting device installation method, displacement limiting device, and bridge girder displacement limiting structure - Google Patents

Displacement limiting device installation method, displacement limiting device, and bridge girder displacement limiting structure Download PDF

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JP5683326B2
JP5683326B2 JP2011047363A JP2011047363A JP5683326B2 JP 5683326 B2 JP5683326 B2 JP 5683326B2 JP 2011047363 A JP2011047363 A JP 2011047363A JP 2011047363 A JP2011047363 A JP 2011047363A JP 5683326 B2 JP5683326 B2 JP 5683326B2
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bridge girder
stopper
support
displacement
limiting device
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JP2012184567A (en
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高田 和彦
和彦 高田
考 永田
考 永田
洋平 小池
洋平 小池
智之 石部
智之 石部
佐織 坪内
佐織 坪内
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株式会社横河ブリッジ
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本願発明は、橋桁が地震などによって大きく変位することを防ぎ、橋台や橋脚からの落下を抑止する変位制限装置の設置方法と、変位制限装置及びその変位制限装置を設置した変位制限構造に関するものであり、具体的には、構成部材の一つである凹部材が2以上の分割体からなる変位制限装置、その設置方法及びその変位制限装置が設置された橋桁の変位制限構造に関するものである。 The present invention relates to an installation method of a displacement limiting device that prevents a bridge girder from being greatly displaced due to an earthquake and the like and suppresses falling from an abutment or a pier, and a displacement limiting device and a displacement limiting structure in which the displacement limiting device is installed. Specifically, the present invention relates to a displacement limiting device in which a concave member, which is one of the constituent members, is composed of two or more divided bodies, an installation method thereof, and a displacement limiting structure of a bridge girder in which the displacement limiting device is installed.

橋台や橋脚など橋桁を支持する構造物(以下、「支持躯体」という。)から橋桁が落下すること(以下、「落橋」という。)はかねてから問題視されていたが、兵庫県南部地震以来、従前にも増してこの落橋への対策が注目されるようになってきた。なお「落橋」という語は、橋梁における種々の損壊現象について広く用いられるものであるが、本書ではあくまで便宜上の理由から、支持躯体から橋桁が落下することを「落橋」とした。   It has been regarded as a problem for some time that the bridge girder has fallen from the structure that supports the bridge girder such as the abutment and the pier (hereinafter referred to as “supporting frame”). More than ever before, the countermeasures against this fallen bridge have attracted attention. The term “falling bridge” is widely used for various damage phenomena in bridges. In this document, for the sake of convenience, the term “falling bridge” means that a bridge girder falls from a support frame.

落橋は、おもに橋桁が大きく変位することによって生ずる。橋桁の変位への対策として最も代表的なものに支承(沓)が挙げられる。この支承には、橋桁を含む上部工から伝達される鉛直荷重を橋台等の下部工に伝える機能と、温度変化に伴う上部工の伸縮や、車両等による衝撃荷重・制動荷重に伴う水平変位に追随する機能が求められる。この水平変位に追随する機能(以下、単に「追随機能」という。)によって、橋桁の支点における応力集中を防ぎ、かつ所定の変位を吸収することができる。 The falling bridge is mainly caused by a large displacement of the bridge girder. One of the most representative measures against bridge girder displacement is support (沓). This support includes the function to transmit the vertical load transmitted from the superstructure including the bridge girder to the substructure such as the abutment, the expansion and contraction of the superstructure accompanying the temperature change, and the horizontal displacement accompanying the impact load and braking load by the vehicle. A function to follow is required. By the function of following the horizontal displacement (hereinafter simply referred to as “following function”), stress concentration at the fulcrum of the bridge girder can be prevented and a predetermined displacement can be absorbed.

また支承は、構成材料によってゴム支承や鋼製支承などに分類され、目的によって固定支承や可動支承に分類され、さらに対応する地震レベルによってタイプAとタイプBに分類される。タイプAの支承は、レベル1の地震(供用中に1〜2回発生すると考えられる比較的規模の小さな地震)に対しては追随機能を発揮するが、レベル2の地震(兵庫県南部地震等を含み、発生確率が極めて低い大規模な地震)に対しては変位制限装置と補完しあって追随機能を発揮するものである。一方、タイプBの支承は、レベル1の地震はもちろん、レベル2の地震まで単独で追随機能を発揮する。   The bearings are classified into rubber bearings, steel bearings, etc. according to the constituent materials, classified into fixed bearings and movable bearings according to the purpose, and further classified into type A and type B according to the corresponding earthquake level. Type A bearings are capable of following a level 1 earthquake (a relatively small earthquake that is expected to occur once or twice in service), but a level 2 earthquake (such as the Hyogoken Nanbu Earthquake) Large-scale earthquakes with a very low probability of occurrence) and complement the displacement limiter to exhibit a tracking function. On the other hand, the Type B support exhibits a tracking function independently up to Level 2 earthquakes as well as Level 1 earthquakes.

このようにタイプAの支承を設置する場合、あわせて変位制限装置が設置されることが多く、またタイプBの支承を設置する場合も、橋軸直角方向の水平変位に追随するため変位制限装置が設置されることもある。   In this way, when installing a type A support, a displacement limiting device is often installed together, and also when installing a type B support, the displacement limiting device follows the horizontal displacement in the direction perpendicular to the bridge axis. May be installed.

従来から用いられている変位制限装置の機構について説明すれば、概ね以下のとおりである。構成要素は、突起状のストッパとこれが係合されるポット部であり、ストッパは支持躯体に設置されてポット部は橋桁に設置されることが多い。そして、ストッパはポット部内の収容空間に係合されており、すなわちストッパはこの収容空間内の限られたスペースしか移動できないため、これによってストッパの変位が制限され、結果的に橋桁と支持躯体の相対的な変位を制限することができる。   The mechanism of the conventional displacement limiting device will be described as follows. The component is a protrusion-like stopper and a pot portion with which the stopper is engaged. In many cases, the stopper is installed on a support housing and the pot portion is installed on a bridge girder. The stopper is engaged with the accommodating space in the pot portion, that is, the stopper can move only in a limited space in the accommodating space, so that the displacement of the stopper is limited, and as a result, the bridge girder and the support housing are moved. The relative displacement can be limited.

変位制限装置はとくに兵庫県南部地震のあと広く用いられ、これまで種々工夫が重ねられており、例えば特許文献1では、水平方向の変位のみならず鉛直方向の変位も制限できるものが提案されている。また、本願発明で着眼している「ポット部の分割」についても、解決しようとする課題や作用・効果は異なるものの、特許文献1や特許文献2の中で示されている。   The displacement limiting device has been widely used especially after the Hyogoken-Nanbu Earthquake, and various devices have been devised so far. For example, Patent Document 1 proposes a device capable of limiting not only horizontal displacement but also vertical displacement. Yes. Also, “dividing the pot portion” focused on in the present invention is shown in Patent Document 1 and Patent Document 2, although the problems to be solved and actions / effects are different.

特開2008−25243号公報JP 2008-25243 A 特開2005−139705号公報JP 2005-139705 A

特許文献1で示される落橋防止構造は、上部工に設置された第1部材(ポット部)と、下部工に設置された第2部材(ストッパ)で構成され、第2部材が具備する凸部に拡張頭部が設けられている。この拡張頭部が、第1部材の下縁に係止されることで、上部工の鉛直方向の変位に抵抗しようとするものである。   The falling bridge prevention structure shown in Patent Document 1 is composed of a first member (pot portion) installed in the upper work and a second member (stopper) installed in the lower work, and the convex portion provided in the second member. Is provided with an extended head. This extended head is intended to resist the vertical displacement of the superstructure by being locked to the lower edge of the first member.

一方、特許文献2で示される発明は、浮島等に連結される浮体橋の支承に関するものであり、鉛直方向と水平方向に自在に案内できる支承に関するものである。   On the other hand, the invention shown in Patent Document 2 relates to a support for a floating bridge connected to a floating island or the like, and relates to a support that can be guided freely in a vertical direction and a horizontal direction.

特許文献1は変位制限装置で特許文献2は支承と、それぞれ対象技術は異なるものの、両者ともに、大きく2つの部材で構成され一方の部材が分割されているという内容が示されている。特許文献1では、第1部材が前方構造体と後方構造体に分割されていることが示され、特許文献2では、軸受本体が2つの半割体に分割されていることが示されている。そして、いずれの特許文献でも分割されたピースは、ボルト等で連結・一体化して使用されるものとしている。すなわち、特許文献1では、前方構造体と後方構造体を組み合わせてボルトで固定することが記載されており、特許文献2では、2つの半割体が突き合わされて鍔部においてボルトで一体化されることが記載されている。   Although Patent Document 1 is a displacement limiting device and Patent Document 2 is a support, each of the subject technologies is different, both of which are largely composed of two members and one member is divided. Patent Document 1 shows that the first member is divided into a front structure and a rear structure, and Patent Document 2 shows that the bearing body is divided into two halves. . And the piece divided | segmented also in any patent document shall be used by connecting and integrating with a volt | bolt etc. That is, in Patent Document 1, it is described that a front structure and a rear structure are combined and fixed with a bolt, and in Patent Document 2, two halves are abutted and integrated with a bolt at a collar. It is described that.

特許文献1を含め従来の変位制限装置は、次のような問題を抱えていた。すなわち、変位制限装置は上部工と下部工の完成後に設置されることが多く、上部工と下部工の間という限られた施工スペースで比較的大きな寸法・重量の変位制限装置を設置するため、設置作業が困難であるという問題と、作業員の安全性に劣るという問題を抱えていた。特に、特許文献1のように、ストッパ(第2部材)に拡張頭部が設けられている場合、あらかじめ拡張頭部をポット部(第1部材)に収容させた上で設置する必要があることから、さらに施工上の困難性が増し、作業安全上の安全性が低下することとなる。   The conventional displacement limiting devices including Patent Document 1 have the following problems. In other words, the displacement limiter is often installed after the completion of the superstructure and substructure, and in order to install a displacement limiter with a relatively large size and weight in a limited construction space between the superstructure and substructure, The problem was that the installation work was difficult and the safety of the workers was inferior. In particular, as in Patent Document 1, when an extended head is provided on the stopper (second member), it is necessary to install the expanded head after the pot portion (first member) is accommodated in advance. Therefore, the difficulty in construction further increases, and the safety in terms of work safety decreases.

特許文献1及び特許文献2では、ポット部(第1部材、軸受本体)を2分割されることは示されているものの、これらは連結・一体化して使用されるものであるから、結局、変位制限装置の寸法・重量の軽減を図ることはできず、つまり前記した施工上の困難性や作業安全上の安全性に関する問題は改善されない。   Although Patent Document 1 and Patent Document 2 show that the pot portion (first member, bearing body) is divided into two parts, these are connected and integrated, so that eventually the displacement It is not possible to reduce the size and weight of the limiting device, that is, the above-described problems related to construction difficulty and work safety are not improved.

本願発明の課題は、従来技術が抱える問題を解消するものであって、極めて施工性に優れ、作業上の安全も図ることができる変位制限装置の設置方法、変位制限構造、及び変位制限装置を提供することにある。   An object of the present invention is to solve the problems of the prior art, and to provide an installation method of a displacement limiting device, a displacement limiting structure, and a displacement limiting device that are extremely excellent in workability and can ensure safety in work. It is to provide.

本願発明は、凸部材と凹部材からなる変位制限装置において、分割した凹部材を連結することなく分離して構造物に設置するという点に着目して開発したものであり、従前からの「凹部材は一体化されて使用されるものである」という固定観念から脱却したものである。   The invention of the present application was developed by focusing on the fact that in a displacement limiting device composed of a convex member and a concave member, the divided concave members are separated and connected to each other without being connected. This is a departure from the fixed idea that the members are used in an integrated manner.

本願発明の変位制限装置の設置方法は、橋台や橋脚などの支持躯体と、その上に支承により支持されている橋桁との間の支持空間に設置して、橋桁と支持躯体との水平方向の相対変位又はその水平方向及び鉛直方向上方への相対変位を制限し得る変位制限装置を設置する方法において、前記変位制限装置は凸部材と凹部材とを備え、凸部材はストッパを備え、凹部材は2以上の分割体を備え、それぞれの分割体は前記ストッパの外周の一部を囲うことのできる収容壁とその内側の収容凹部を備え、凸部材が橋桁と支持躯体のいずれか一方に固定され、凹部材が前記凸部材の外周を囲って橋桁と支持躯体の他方に固定され、これら凸部材と凹部材とによって橋桁と支持躯体の前記相対変位を制限することができるものであり、前記支持空間にその側方から前記変位制限装置の凸部材を配置して橋桁と支持躯体のいずれか一方に固定する凸部材設置工程と、前記凸部材設置工程により凸部材を設置固定してから、前記支持空間の側方から当該支持空間内であって前記凸部材のストッパの外側に、前記凹部材の2以上の分割体を個別に配置して橋桁と支持躯体のいずれか他方に固定し、この配置固定を分割体の数だけ行うことにより、凸部材のストッパの外側を前記2以上の分割体の収容壁で囲うとともに当該ストッパの外周面と分割体の収容凹部内周面との間に隙間を設ける工程を備えた方法である。 The displacement limiting device according to the present invention is installed in a support space between a support frame such as an abutment or a pier and a bridge girder supported by a support on the support frame, and the horizontal direction between the bridge girder and the support frame is set. In the method of installing a displacement limiting device capable of limiting relative displacement or relative displacement in the horizontal and vertical directions , the displacement limiting device includes a convex member and a concave member, the convex member includes a stopper, and the concave member. Comprises two or more divided bodies, each divided body having a housing wall capable of enclosing a part of the outer periphery of the stopper and a housing recessed portion inside thereof, and the convex member is fixed to either the bridge girder or the support housing. The concave member surrounds the outer periphery of the convex member and is fixed to the other of the bridge girder and the support case, and the relative displacement of the bridge girder and the support case can be limited by the convex member and the concave member, Support space A convex member installation step of arranging the convex member of the displacement limiting device from the side and fixing the convex member to one of the bridge girder and the support housing, and after fixing the convex member by the convex member installation step, From the side, in the support space, outside the stopper of the convex member, two or more divided bodies of the concave material are individually arranged and fixed to either the bridge girder or the support frame, and this arrangement fixing is performed. The step of enclosing the outside of the stopper of the convex member with the housing wall of the two or more divided bodies and providing a gap between the outer peripheral surface of the stopper and the inner circumferential surface of the recessed portion of the divided body by performing as many as the number of the divided bodies It is a method provided with .

本願発明の変位制限装置の設置方法は、橋台や橋脚などの支持躯体と、その上に支承により支持されている橋桁との間の支持空間に設置して、橋桁と支持躯体との水平方向の相対変位又はその水平方向及び鉛直方向上方への相対変位を制限し得る変位制限装置を設置する方法において、前記変位制限装置は凸部材と凹部材とを備え、凸部材はストッパを備え、凹部材は2以上の分割体を備え、それぞれの分割体は前記ストッパの外周の一部を囲うことのできる収容壁とその内側の収容凹部を備え、凸部材が橋桁と支持躯体のいずれか一方に固定され、凹部材が前記凸部材の外周を囲って橋桁と支持躯体の他方に固定され、これら凸部材と凹部材とによって橋桁と支持躯体の前記相対変位を制限することができるものであり、前記支持空間の側方からその支持空間内に前記変位制限装置の一部の分割体を配置して橋桁と支持躯体のいずれか一方に固定する分割体設置工程と、前記分割体設置工程により分割体を設置固定してから、前記支持空間の側方から当該支持空間内であって前記分割体の収容凹部の内側に変位制限装置の凸部材を配置して橋桁と支持躯体のいずれか他方に固定する凸部材設置工程と、前記分割体設置工程により一部の分割体を設置固定し、その後に前記凸部材設置工程により凸部材を設置固定してから、前記支持空間の側方からその支持空間内であって前記凸部材のストッパの外側に他の分割体を配置して先に分割体を固定した橋桁又は支持躯体に固定することにより、この分割体と先に設置固定されている分割体とにより前記ストッパの外周を囲うとともに当該ストッパの外周面と分割体の収容凹部内周面との間に隙間を設ける工程を備えた方法とすることもできる。 The displacement limiting device according to the present invention is installed in a support space between a support frame such as an abutment or a pier and a bridge girder supported by a support on the support frame, and the horizontal direction between the bridge girder and the support frame is set. In the method of installing a displacement limiting device capable of limiting relative displacement or relative displacement in the horizontal and vertical directions , the displacement limiting device includes a convex member and a concave member, the convex member includes a stopper, and the concave member. Comprises two or more divided bodies, each divided body having a housing wall capable of enclosing a part of the outer periphery of the stopper and a housing recessed portion inside thereof, and the convex member is fixed to either the bridge girder or the support housing. The concave member surrounds the outer periphery of the convex member and is fixed to the other of the bridge girder and the support case, and the relative displacement of the bridge girder and the support case can be limited by the convex member and the concave member, Support space side A partial body installation step in which a part of the displacement limiting device is disposed in the support space and fixed to either the bridge girder or the support frame, and the division body is installed and fixed by the split body installation step. From the side of the support space, a convex member installation step of disposing the convex member of the displacement limiting device inside the support recess and inside the accommodating recess of the divided body and fixing it to either the bridge girder or the support housing And after installing and fixing a part of the divided body by the divided body installation step, after installing and fixing the convex member by the convex member installation step, in the support space from the side of the support space, By arranging another divided body on the outside of the stopper of the convex member and fixing it to the bridge girder or the support frame to which the divided body is fixed first, the divided body and the divided body that has been installed and fixed earlier are used to fix the stopper. Enclose the outer periphery It may be a method comprising the step of providing a gap between the outer peripheral surface and the housing recess inner peripheral surface of the divided body of the stopper.

本願発明の変位制限装置は、橋台や橋脚などの支持躯体と、その上に支承により支持されている橋桁との間の支持空間に設置して、橋桁と支持躯体との水平方向の相対変位又はその水平方向及び鉛直方向上方への相対変位を制限し得る変位制限装置において、前記変位制限装置は凸部材と凹部材とを備え、凸部材は固定プレートと当該固定プレートからそれと鉛直方向に突出するストッパを備え、凹部材は2以上の分割体を備え、それぞれの分割体はストッパの外周の一部を囲うことのできる収容壁とその内側の収容凹部を備え、凸部材は前記支持空間の側方から当該支持空間内に配置して橋桁と支持躯体とのいずれか一方に固定することができ、凹部材の分割体は、前記支持空間にその側方から個別に配置して橋桁と支持躯体とのいずれか他方に固定することにより前記ストッパの外周を2以上の分割体で囲うことができ、前記2以上の分割体の収容凹部は、前記ストッパの外周を囲うことによりストッパの外周面と分割体の収容壁の内周面との間に隙間ができる広さであり、前記2以上の分割体を配置固定した凹部材とその凹部材で囲まれるストッパとは、橋桁と支持躯体との水平方向又は水平方向及び鉛直方向への相対変位発生時に衝突してその相対変位を制限することができるThe displacement limiting device of the present invention is installed in a support space between a support frame such as an abutment or a pier and a bridge girder supported by a support on the support frame, and a horizontal relative displacement between the bridge girder and the support frame or In the displacement limiting device capable of limiting the relative displacement in the horizontal and vertical directions , the displacement limiting device includes a convex member and a concave member, and the convex member protrudes vertically from the fixed plate and the fixed plate. A stopper is provided, and the concave member has two or more divided bodies, each of the divided bodies has a housing wall capable of enclosing a part of the outer periphery of the stopper and an inner housing concave portion, and the convex member is located on the side of the support space. It can be arranged in the support space from the side, and can be fixed to either the bridge girder or the support frame, and the divided body of the recess material can be individually arranged in the support space from the side and bridge girder and the support frame. And either The outer periphery of the stopper can be surrounded by two or more divided bodies, and the receiving recesses of the two or more divided bodies can enclose the outer peripheral surface of the stopper and the divided body by surrounding the outer periphery of the stopper. The recess material in which a gap is formed between the wall and the inner peripheral surface, and the two or more divided bodies are arranged and fixed, and the stopper surrounded by the recess material are horizontal or horizontal between the bridge girder and the support frame. It is possible to limit the relative displacement by collision when the relative displacement occurs in the direction and the vertical direction .

本願発明の変位制限装置は、前記変位制限装置において、凸部材のストッパが角柱状であり、分割体の収容凹部の内面が平面であり、前記収容凹部の内面は水平方向の相対変位発生時にストッパの外周面と面衝突するようにすることもできる。In the displacement limiting device of the present invention, in the displacement limiting device, the stopper of the convex member is a prismatic shape, the inner surface of the housing recess of the divided body is flat, and the inner surface of the housing recess is a stopper when a relative displacement in the horizontal direction occurs. It is also possible to make a surface collision with the outer peripheral surface of the.

本願発明の変位制限装置は、前記変位制限装置において、ストッパの先端側に、当該ストッパの外周面外側に水平に張り出すストッパ拡張部が設けられ、分割体は2以上を支持空間内に配置固定することにより、ストッパの外周であってストッパ拡張部の下方を囲うことができる In the displacement limiting device according to the present invention, in the displacement limiting device, a stopper extension portion is provided on the tip end side of the stopper so as to extend horizontally outside the outer peripheral surface of the stopper, and two or more divided bodies are arranged and fixed in the support space. By doing so, it is possible to surround the stopper and the lower part of the stopper extension .

本願発明の変位制限装置は、前記変位制限装置において、分割体は障害板を備え、障害板は水平方向の相対変位発生時にストッパの外周面と衝突できるように、分割体の収容壁から収容凹部内に水平に突設することもできる。
ことを特徴とする変位制限装置。
The displacement limiting device according to the present invention is the above displacement limiting device , wherein the divided body includes an obstruction plate, and the obstruction plate can collide with the outer circumferential surface of the stopper when the relative displacement in the horizontal direction is generated, from the accommodating wall of the divided body. It can also project horizontally inside.
A displacement limiting device characterized by that.

本願発明の変位制限装置は、前記変位制限装置において、ストッパの外周と障害板の先端のいずれか一方に弾性のある緩衝材を備えることもできる。In the displacement limiting device of the present invention, in the displacement limiting device, an elastic buffer material may be provided on either the outer periphery of the stopper or the tip of the obstacle plate.

本願発明の変位制限構造は、橋台や橋脚などの支持躯体と、その上に、支承により支持されている橋桁との間の支持空間に、橋桁と支持躯体との水平方向又は水平方向及び鉛直方向の相対変位を制限し得る変位制限装置を設置した変位制限構造において、前記変位制限装置が請求項3記載の変位制限装置であり、前記変位制限装置の凸部材が橋桁と支持躯体の間の支持空間に設置され、橋桁と支持躯体のいずれか一方に固定されて、当該凸部材のストッパが前記支持空間内に突出し、2以上の分割体が前記支持空間に設置され、橋桁と支持躯体のいずれか他方に固定され、それら分割体の収容壁で前記ストッパの外周が囲われて、ストッパの外周面と分割体の収容凹部内面との間に隙間が形成され、橋桁と支持躯体との前記相対変位発生時に、前記2以上の分割体とそれらで囲まれたストッパとが衝突してその相対変位が制限される構造であるThe displacement limiting structure of the present invention is a horizontal or horizontal and vertical direction between a bridge girder and a support frame in a support space between a support frame such as an abutment or a pier and a bridge girder supported by a support. A displacement limiting structure in which a displacement limiting device capable of limiting the relative displacement is installed, wherein the displacement limiting device is the displacement limiting device according to claim 3, and the convex member of the displacement limiting device is a support between the bridge girder and the support frame. Installed in the space, fixed to either the bridge girder or the support frame, the stopper of the convex member protrudes into the support space, and two or more divided bodies are installed in the support space, and either the bridge girder or the support frame The outer periphery of the stopper is surrounded by the housing wall of the divided body, and a gap is formed between the outer peripheral surface of the stopper and the inner surface of the housing recess of the divided body. When displacement occurs A structure in which the relative displacement is limited the two or more divided body and a stopper enclosed by them collide.

本願発明の橋桁の変位制限構造は、橋台や橋脚などの支持躯体と、その上に、支承により支持されている橋桁との間の支持空間に、橋桁と支持躯体との水平方向又は水平方向及び鉛直方向の相対変位を制限し得る変位制限装置を設置した橋桁の変位制限構造において、前記変位制限装置が請求項4記載の、ストッパが角柱状である変位制限装置であり、前記変位制限装置の凸部材が橋桁と支持躯体の間の支持空間に配置され、橋桁と支持躯体のいずれか一方に固定されて、当該凸部材の角柱状のストッパが前記支持空間内に突出し、2以上の分割体が前記支持空間に配置され、橋桁と支持躯体のいずれか他方に固定されて、それら分割体の収容壁で前記角柱状のストッパの外周が囲われ、角柱状のストッパの外周面と分割体の収容凹部内面との間に隙間が形成され、橋桁と支持躯体との相対変位発生時に、前記2以上の分割体とそれらで囲まれた角柱状のストッパとが面衝突して、その相対変位が制限される構造である The displacement restriction structure of the bridge girder of the present invention has a horizontal or horizontal direction between the bridge girder and the support frame in a support space between the support frame such as the abutment and the pier and the bridge girder supported by the support. In a bridge girder displacement limiting structure provided with a displacement limiting device capable of limiting the relative displacement in the vertical direction, the displacement limiting device is a displacement limiting device in which the stopper is a prismatic shape, and the displacement limiting device A convex member is disposed in a support space between the bridge girder and the support housing, fixed to either the bridge girder or the support housing, and a prismatic stopper of the convex member protrudes into the support space, and two or more divided bodies Is disposed in the support space, fixed to either the bridge girder or the support frame, and the outer periphery of the prismatic stopper is surrounded by the partition wall, and the outer peripheral surface of the prismatic stopper and the split body The inner surface of the receiving recess A structure is formed in which a gap is formed between them, and when the relative displacement between the bridge girder and the support frame occurs, the two or more divided bodies and the prismatic stopper surrounded by them collide with each other, and the relative displacement is limited. There is .

本願発明の橋桁の変位制限構造は、橋台や橋脚などの支持躯体と、その上に、支承により支持されている橋桁との間の支持空間に、橋桁と支持躯体との水平方向又は水平方向及び鉛直方向の相対変位を制限し得る変位制限装置を設置した橋桁の変位制限構造において、前記変位制限装置が請求項5記載の、凸部材がストッパ拡張部を備えた変位制限装置であり、凸部材が橋桁と支持躯体の間の支持空間に配置され、橋桁と支持躯体のいずれか一方に固定されて当該凸部材のストッパが前記支持空間に突出し、2以上の分割体が前記支持空間に配置されて橋桁と支持躯体のいずれか他方に固定され、前記ストッパの外周であってストッパ拡張部の下方が2以上の分割体の収容壁で囲まれてストッパと分割体の収容凹部内面との間に隙間が形成され、前記2以上の分割体とストッパ及びストッパ拡張部とが、橋桁と支持躯体との前記相対変位発生時に衝突してそれら相対変位が制限される構造である The displacement restriction structure of the bridge girder of the present invention has a horizontal or horizontal direction between the bridge girder and the support frame in a support space between the support frame such as the abutment and the pier and the bridge girder supported by the support. 6. A bridge girder displacement restriction structure in which a displacement restriction device capable of restricting relative displacement in the vertical direction is installed, wherein the displacement restriction device is a displacement restriction device provided with a stopper extension, and the convex member. Is disposed in a support space between the bridge girder and the support frame, fixed to either the bridge girder or the support frame, the stopper of the convex member projects into the support space, and two or more divided bodies are disposed in the support space. The bridge girder and the support frame are fixed to the other, the outer periphery of the stopper, and the lower part of the stopper extension is surrounded by two or more divided body housing walls, between the stopper and the inner surface of the housing housing recess. Gaps formed The a 2 or more divided member and the stopper and the stopper extension is a structure in which the relative displacement occurs during a collision to their relative displacement between the bridge girder and the support skeleton is limited.

本願発明の橋桁の変位制限構造は、橋台や橋脚などの支持躯体と、その上に、支承により支持されている橋桁との間の支持空間に、橋桁と支持躯体との水平方向又は水平方向及び鉛直方向への相対変位を制限し得る変位制限装置を設置した橋桁の変位制限構造において、前記変位制限装置が請求項6記載の、分割体が障害板を備えた変位制限装置であり、凸部材が橋桁と支持躯体の間の支持空間に設置され、橋桁と支持躯体のいずれか一方に固定されて、当該凸部材のストッパが前記支持空間内に突設され、2以上の分割体が前記支持空間内に設置されて橋桁と支持躯体のいずれか他方に固定され、前記ストッパの外周が2以上の分割体の収容壁及び障害板で囲まれて、前記ストッパと前記分割体及び収容壁及び障害板との間に隙間が形成され、前記2以上の分割体の障害板とストッパとが、橋桁と支持躯体との前記相対変位発生時に衝突してその相対変位が制限される構造である The displacement restriction structure of the bridge girder of the present invention has a horizontal or horizontal direction between the bridge girder and the support frame in a support space between the support frame such as the abutment and the pier and the bridge girder supported by the support. A bridge girder displacement restriction structure provided with a displacement restriction device capable of restricting relative displacement in the vertical direction, wherein the displacement restriction device is a displacement restriction device in which the divided body includes an obstacle plate, and a convex member Is installed in a support space between the bridge girder and the support frame, fixed to one of the bridge girder and the support frame, a stopper of the convex member protrudes into the support space, and two or more divided bodies support the support It is installed in a space and is fixed to either the bridge girder or the support frame, and the outer periphery of the stopper is surrounded by two or more divided body housing walls and obstacle plates, and the stopper, the divided body, the housing wall, and the obstacle A gap is formed between the plate The is a 2 or more failures plate and stopper divided bodies, a structure in which the collided during a relative displacement occurs the relative displacement between the bridge deck and the support skeleton is limited.

本願発明の橋桁の変位制限構造は、橋台や橋脚などの支持躯体と、その上に、支承により支持されて設置されている橋桁との間の支持空間に、橋桁と支持躯体との水平方向又は水平方向及び鉛直方向への相対変位を制限し得る変位制限装置を設置した橋桁の変位制限構造において、前記変位制限装置が請求項7記載の、分割体とストッパとのいずれか一方が緩衝材を備えた変位制限装置であり、凸部材が橋桁と支持躯体の間の支持空間内に設置され、橋桁と支持躯体のいずれか一方に固定されて当該凸部材のストッパが前記支持空間内に突設され、2以上の分割体が前記支持空間内に設置されて橋桁と支持躯体のいずれか他方に固定され、前記ストッパの外周が前記2以上の分割体の収容壁で囲まれてストッパと分割体の収容凹部内面との間に隙間が形成され、前記ストッパの緩衝材と2以上の分割体の収容凹部内面とが、又は2以上の分割体の緩衝材と前記ストッパの外周面とが、前記相対変位発生時に衝突することによってその相対変位が制限される構造である The displacement restriction structure of the bridge girder of the present invention is the horizontal space between the bridge girder and the support frame in the support space between the support frame such as the abutment or the pier and the bridge girder supported and installed on the support frame. In the displacement limiting structure of the bridge girder in which the displacement limiting device capable of limiting the relative displacement in the horizontal direction and the vertical direction is installed, the displacement limiting device is any one of the divided body and the stopper according to claim 7, The convex member is installed in the support space between the bridge girder and the support housing, and is fixed to either the bridge girder or the support housing, and the stopper of the convex member protrudes into the support space. And the two or more divided bodies are installed in the support space and fixed to either the bridge girder or the support housing, and the stopper is surrounded by the housing wall of the two or more divided bodies. Between the housing recess and the inner surface A gap is formed, and the buffer material of the stopper and the inner surface of the housing recess of the two or more divided bodies, or the buffer material of two or more divided bodies and the outer peripheral surface of the stopper collide when the relative displacement occurs. The relative displacement is limited .

本願発明の変位制限装置の設置方法、橋桁の変位制限構造、及び変位制限装置には、次のような効果がある。
(1)凹部材内に係合されたストッパが収容壁に衝突することで凸部材の移動が制限され、これによって確実に橋桁と支持躯体との相対変位を制限することができる。さらに、凹部材に障害板を備え、凸部材にストッパ拡張部を備えると、鉛直方向の相対変位を制限することもできる。
(2)凹部材が2以上の分割体に分割されているので、小運搬や設置作業が容易となり、結果的に、作業上の安全性も向上する。
(3)とくに、鉛直方向の変位を制限するために障害板とストッパ拡張部を備えた場合、分割体を部分的に設置、凸部材を設置、残りの分割体を設置、という手順で進めることができるので、あらかじめ凸部材と凹部材を一体化させる必要がなく、従来に比べると著しく作業性と作業安全性に優れる。
(4)設置した凹部材は分割体ごとに取り外すことができ、すなわち凹部材あるいは凸部材を容易に取り外すことができるので、取替えが容易となって維持管理性にも優れる。
The displacement limiting device installation method, bridge girder displacement limiting structure, and displacement limiting device of the present invention have the following effects.
(1) The movement of the convex member is restricted when the stopper engaged in the concave member collides with the housing wall, and thus the relative displacement between the bridge beam and the support housing can be surely restricted. Furthermore, if the concave member is provided with an obstacle plate and the convex member is provided with a stopper extension, the relative displacement in the vertical direction can be limited.
(2) Since the recess material is divided into two or more divided bodies, small transportation and installation work are facilitated, and as a result, work safety is improved.
(3) Especially when the obstacle plate and the stopper extension part are provided to limit the displacement in the vertical direction, proceed with the procedure of partially installing the divided body, installing the convex member, and installing the remaining divided body. Therefore, it is not necessary to integrate the convex member and the concave member in advance, and the workability and work safety are remarkably excellent as compared with the conventional case.
(4) Since the installed concave member can be removed for each divided body, that is, the concave member or the convex member can be easily removed, the replacement is facilitated and the maintenance is excellent.

本願発明の変位制限装置が設置された橋梁を側面から見た全体図。The whole figure which looked at the bridge where the displacement limiting device of the present invention was installed from the side. (a)は変位制限装置の取付け箇所の詳細を示す側面図、(b)は(a)のA−A矢視断面図、(c)は(a)のB−B矢視断面図。(A) is a side view which shows the detail of the attachment location of a displacement limiting apparatus, (b) is the AA arrow sectional drawing of (a), (c) is BB arrow sectional drawing of (a). 凸部材を説明する斜視図。The perspective view explaining a convex member. (a)はストッパの胴部外周面に取り付けられた緩衝材を示す断面図、(b)はストッパの胴部外周面及び上面に取り付けられた緩衝材を示す断面図、(c)はストッパの胴部外周面及びストッパ拡張部の下面に取り付けられた緩衝材を示す断面図、(d)は凹部材に取り付けられた緩衝材を示す断面図。(A) is sectional drawing which shows the shock absorbing material attached to the trunk | drum outer peripheral surface of a stopper, (b) is sectional drawing which shows the shock absorbing material attached to the trunk | drum outer peripheral surface and upper surface of a stopper, (c) is a stopper of FIG. Sectional drawing which shows the shock absorbing material attached to the trunk | drum outer peripheral surface and the lower surface of a stopper expansion part, (d) is sectional drawing which shows the shock absorbing material attached to the recessed part material. (a)は凸部材が係合される前の状態の凹部材を示す斜視図、(b)は凸部材が係合された後の状態の凹部材を示す斜視図である。(A) is a perspective view which shows the recessed material in the state before a convex member is engaged, (b) is a perspective view which shows the recessed material in a state after the convex member is engaged. (a)は変位制限装置の設置状態を上方側から見た平面図、(b)は(a)のX−X矢視断面図、(c)は(a)のY−Y矢視断面図。(A) is the top view which looked at the installation state of a displacement limiting device from the upper side, (b) is XX arrow sectional drawing of (a), (c) is YY arrow sectional drawing of (a). . 凹部材が4つの分割体からなる変位制限装置の設置状態を下方側から見た平面図。The top view which looked at the installation state of the displacement control apparatus which a recessed part material consists of four division bodies from the downward side. (a)は橋台と橋桁に相対的水平変位が生じたときの変位制限装置の作用について説明するモデル図、(b)は橋台と橋桁に相対的鉛直変位が生じたときの変位制限装置の作用について説明するモデル図。(A) is a model diagram for explaining the action of the displacement limiting device when relative horizontal displacement occurs between the abutment and the bridge girder, and (b) shows the operation of the displacement limiting device when relative vertical displacement occurs between the abutment and the bridge girder. The model figure explaining about. (a)は凹部材のうち一部の分割体を設置する第1次凹部設置工程を説明する断面図、(b)は凸部材を橋台に設置する凸部設置工程を説明する断面図、(c)は残りの分割体7を取り付けて凹部材6の設置を完成させる第2次凹部設置工程を説明する断面図。(A) is sectional drawing explaining the 1st recessed part installation process which installs some division bodies among recessed parts, (b) is sectional drawing explaining the convex part installation process which installs a convex member in an abutment, ( c) Sectional drawing explaining the 2nd recessed part installation process which attaches the remaining division body 7 and completes installation of the recessed part material 6. FIG.

[実施形態]
本願発明の変位制限装置の設置方法、橋桁の変位制限構造、及び変位制限装置の一実施形態を図に基づいて説明する。
[Embodiment]
An embodiment of a displacement limiting device installation method, a bridge girder displacement limiting structure, and a displacement limiting device according to the present invention will be described with reference to the drawings.

(全体構成)
まず本願発明の全体構成について簡単に説明する。なお図1は、本願発明の変位制限装置1(図2(a))が設置された橋梁を側面から見た全体図、図2は図1に示すD部詳細図であり、図2(a)は変位制限装置の取付け箇所の詳細を示す側面図、図2(b)は図2(a)のA−A矢視断面図、図2(c)は図2(a)のB−B矢視断面図である。
(overall structure)
First, the overall configuration of the present invention will be briefly described. 1 is an overall view of a bridge on which a displacement limiting device 1 (FIG. 2 (a)) of the present invention is installed as seen from the side, and FIG. 2 is a detailed view of a portion D shown in FIG. ) Is a side view showing details of the location where the displacement limiting device is attached, FIG. 2B is a cross-sectional view taken along the line AA of FIG. 2A, and FIG. 2C is BB of FIG. It is arrow sectional drawing.

図1で示す橋梁は単純梁形式の跨川橋であり、左岸,右岸それぞれに構築された橋台2が、支承4を介して橋桁3を支持している。支承4の一方(図では左側)は固定支承4a(fix)であり、他方(図では右側)は可動支承4b(move)である。   The bridge shown in FIG. 1 is a simple bridge type bridge bridge, and an abutment 2 constructed on each of the left bank and the right bank supports the bridge girder 3 via a support 4. One of the bearings 4 (left side in the figure) is a fixed bearing 4a (fix), and the other (right side in the figure) is a movable bearing 4b (move).

変位制限装置1は、固定支承4a側の橋台2(図1では左側)と橋桁3との上下間に設置され、例えば図2(a)に示すように、橋軸方向に向けて支承4と並べて設置することができる。この図では、橋台2にボルト固定されたブラケットBrの上に変位制限装置1を設置しているが、もちろんブラケットBrを設けることなく橋台2上に直接設置してもよい。また、変位制限装置1と支承4を橋軸方向に並べて設置する場合に限らず、支承4周辺の任意の位置に(例えば支承4と橋軸直角方向に並べて)設置することができる。   The displacement limiting device 1 is installed between the top and bottom of the abutment 2 (left side in FIG. 1) and the bridge girder 3 on the side of the fixed support 4a. For example, as shown in FIG. Can be installed side by side. In this figure, the displacement limiting device 1 is installed on the bracket Br fixed to the abutment 2 by bolts. However, it is of course possible to install it directly on the abutment 2 without providing the bracket Br. Further, the displacement limiting device 1 and the support 4 are not limited to be installed side by side in the bridge axis direction, but can be installed at any position around the support 4 (for example, side by side in the direction perpendicular to the support 4 and the bridge axis).

ここでは、図1に示すように、変位制限装置1が固定支承4a側の橋台2と橋桁3の間に設置された場合で説明しているが、変位制限装置1の設置場所はこれに限定されるものではない。例えば、可動支承4b側の橋台2(図1では右側)と橋桁3の間に変位制限装置1を設置することもできるし、橋台2に代えて橋脚と橋桁3の間に設置することもできる。つまり、上部工(橋桁3など)と下部工(橋台2や橋脚といった支持躯体)の間であれば任意の場所で、変位制限装置1を設置することができる。もちろん単純梁形式の跨川橋に限らず、あらゆる構造形式(多径間形式など)や桁形式(版桁や箱桁、場打ちコンクリートの桁、鋼製桁やPC桁といった工場製作の桁、など)の橋梁、高架橋、跨道橋,跨線橋など種々の用途の橋梁、新設橋や既設橋、といった様々な橋梁に本願発明の変位制限装置1を設置することができる。   Here, as shown in FIG. 1, the case where the displacement limiting device 1 is installed between the abutment 2 and the bridge girder 3 on the fixed support 4a side is described, but the installation place of the displacement limiting device 1 is limited to this. Is not to be done. For example, the displacement limiting device 1 can be installed between the abutment 2 (right side in FIG. 1) and the bridge girder 3 on the movable support 4b side, or can be installed between the pier and the bridge girder 3 instead of the abutment 2. . In other words, the displacement limiting device 1 can be installed at any location between the superstructure (such as the bridge girder 3) and the substructure (supporting frame such as the abutment 2 and the pier). Of course, not only the simple bridge type bridge bridge, but also any structural type (multi-span type etc.) and girder format (plate girder, box girder, cast-in-place concrete girder, steel girder, PC girder, etc.) The displacement limiting device 1 of the present invention can be installed on various bridges such as bridges for various purposes such as bridges, viaducts, overpasses, and overpasses, new bridges, and existing bridges.

本願発明の変位制限装置1は、大きく2つの部材で構成されており、一つは凸部材5で、他の一つは凹部材6である(図2(c))。そして凸部材5は橋台2に固定され、一方の凹部材6は橋桁3に固定される。凸部材5は、凹部材6の収容空間(後に詳述)内で係合されており、この収容空間内であれば自由に移動することができる。換言すれば、凸部材5はその移動範囲を凹部材6の収容空間内に限定されており、この結果、凸部材5を固定している橋台2と橋桁3の相対的な水平方向の変位が制限される。なお、ここでいう相対的な水平方向の変位(以下、「相対的水平変位」という。)とは、一方(例えば橋台2)から見た他方(例えば橋桁3)の変位を意味するものであり、橋台2と橋桁3が同じ方向に同じ量だけ同時に移動した場合は相対的な変位は生じていないこととなる。また、ここで説明した相対的水平変位とは、水平方向(厳密な水平方向に限らず略水平方向も含む)の変位を意味するが、水平面内であればあらゆる方向(橋軸方向、橋軸直角方向、など)の変位が含まれる。   The displacement limiting device 1 of the present invention is mainly composed of two members, one is a convex member 5 and the other is a concave member 6 (FIG. 2 (c)). The convex member 5 is fixed to the abutment 2, and one concave member 6 is fixed to the bridge girder 3. The convex member 5 is engaged in the accommodation space (detailed later) of the concave member 6 and can move freely within this accommodation space. In other words, the range of movement of the convex member 5 is limited to the space in which the concave member 6 is accommodated. As a result, the relative horizontal displacement between the abutment 2 and the bridge girder 3 fixing the convex member 5 is reduced. Limited. Here, the relative horizontal displacement (hereinafter referred to as “relative horizontal displacement”) means the displacement of the other (for example, bridge girder 3) viewed from one (for example, abutment 2). When the abutment 2 and the bridge girder 3 are simultaneously moved in the same direction by the same amount, no relative displacement occurs. In addition, the relative horizontal displacement described here means a displacement in the horizontal direction (not only in a strict horizontal direction but also in a substantially horizontal direction), but in any direction within the horizontal plane (bridge axis direction, bridge axis) Displacement in a perpendicular direction, etc.).

前記のとおり、変位制限装置1は凸部材5と凹部材6との組み合わせであり、凸部材5と凹部材6のうちどちらか一方を橋台2に設置し、他方を橋桁3に設置して使用する。図2(a)に示すように、橋台2に凸部材5を設置して橋桁3に凹部材6を設置する場合に限らず、橋台2に凹部材6を設置して橋桁3に凸部材5を設置してもよい。ただし、凹部材6は水が溜まりやすい形状を呈しているので、橋台2など下部工側に凹部材6を設置する場合は、水抜き孔など排水手段を設けることが望ましい。   As described above, the displacement limiting device 1 is a combination of the convex member 5 and the concave member 6, and either the convex member 5 or the concave member 6 is installed on the abutment 2 and the other is installed on the bridge girder 3. To do. As shown in FIG. 2A, not only when the convex member 5 is installed on the abutment 2 and the concave member 6 is installed on the bridge girder 3, but the concave member 6 is installed on the abutment 2 and the convex member 5 on the bridge girder 3. May be installed. However, since the recessed member 6 has a shape in which water is likely to accumulate, when the recessed member 6 is installed on the lower work side such as the abutment 2, it is desirable to provide a drainage means such as a drain hole.

本願発明の変位制限装置1を構成する凹部材6は、図5(a)に示すように複数の分割体7からなる。一般に変位制限装置1は既設橋に設置されることが多く、この場合、橋台2と橋桁3との間の狭いスペースで、しかも大きくて重い部材を扱うこととなって、作業者は常に怪我の危険を伴う。凹部材6を分割することで、取り扱う部材が軽量かつ小さくなり、作業上の安全性と施工性が向上する、という効果が期待できる。なお、凹部材6の分割数、つまり一つの凹部材6を構成する分割体7の数は、2以上であれば任意の数とすることができるが、設置する現場の状況や製作コストなどを考慮して適切な分割数で設計することが望ましい。ここでは便宜上、凹部材6を2分割した場合で説明する。   The recessed member 6 constituting the displacement limiting device 1 of the present invention is composed of a plurality of divided bodies 7 as shown in FIG. In general, the displacement limiting device 1 is often installed on an existing bridge. In this case, a large and heavy member is handled in a narrow space between the abutment 2 and the bridge girder 3, and the operator is always injured. With danger. By dividing the recess material 6, it is possible to expect the effect that the member to be handled becomes light and small, and the safety and workability in work are improved. The number of divisions of the concave member 6, that is, the number of the divided bodies 7 constituting one concave member 6 can be any number as long as it is two or more. It is desirable to design with an appropriate number of divisions in consideration. Here, for the sake of convenience, the case where the concave member 6 is divided into two parts will be described.

以下、構成要素ごとに詳細に説明する。   Hereinafter, each component will be described in detail.

(凸部材)
図3は、凸部材5を説明する斜視図である。なおこの図では、説明上、凸部材5を主な部品ごとに分解した状態を示している。凸部材5は、直接的あるいは(ブラケットBrを介して)間接的に橋桁3へ固定され、凸部材5と橋台2は一体となって挙動する。すなわち、凸部材5の変位を制限することができれば、橋桁3の変位も制限することができる。
(Convex member)
FIG. 3 is a perspective view for explaining the convex member 5. In addition, in this figure, the state which decomposed | disassembled the convex member 5 for every main components is shown on account. The convex member 5 is fixed to the bridge girder 3 directly or indirectly (via the bracket Br), and the convex member 5 and the abutment 2 behave together. That is, if the displacement of the convex member 5 can be limited, the displacement of the bridge girder 3 can also be limited.

凸部材5は、図3に示すように、固定プレート51と、ストッパ52で構成される。固定プレート51は鋼製のプレートであり、橋台2にボルト固定するためのボルト孔51aが所定数(図では4個)設けられている。ストッパ52は、固定プレート51よりも小面積の底面を持つ直方体であり、やはり鋼材で作成される。ストッパ52の底面部分が、固定プレート51に溶接されて、凸部材5となる。   As shown in FIG. 3, the convex member 5 includes a fixed plate 51 and a stopper 52. The fixing plate 51 is a steel plate, and is provided with a predetermined number (four in the figure) of bolt holes 51a for bolting to the abutment 2. The stopper 52 is a rectangular parallelepiped having a bottom area smaller than that of the fixed plate 51 and is also made of steel. The bottom surface portion of the stopper 52 is welded to the fixed plate 51 to form the convex member 5.

本願発明に使用される凸部材5は、固定プレート51に対して立設する突起物であるストッパ52のみが必須の部材である。このストッパ52の形状は、橋台2に設置した際に立設した突起物となれば、図3の直方体に限らず、円柱、楕円柱、多角形体、その他任意の形状とすることができる。また、橋桁3の変位を制限することができれば、溶接以外の従来手法で固定プレート51に固定することもできるし、固定プレート51を介さず直接橋台2に固定することもできる。また、ストッパ52の材質も鋼材に限らず、強度上の設計要件を満足すれば種々の材料を使用することができる。   The convex member 5 used in the present invention is a member in which only the stopper 52 which is a protrusion standing on the fixed plate 51 is essential. The shape of the stopper 52 is not limited to the rectangular parallelepiped in FIG. 3 as long as it is a protrusion that is erected when installed on the abutment 2, and can be a cylinder, an elliptical column, a polygon, or any other shape. Further, if the displacement of the bridge girder 3 can be limited, the bridge girder 3 can be fixed to the fixed plate 51 by a conventional method other than welding, or can be directly fixed to the abutment 2 without using the fixed plate 51. Further, the material of the stopper 52 is not limited to steel, and various materials can be used as long as the design requirements for strength are satisfied.

ストッパ52には、ストッパ拡張部53を設けることもできる。後述するように、このストッパ拡張部53を設けることで、橋台2と橋桁3の相対的な鉛直方向の変位(以下、「相対的鉛直変位」という。)を制限することができる。このストッパ拡張部53は、ストッパ52の軸方向(図3では上下方向)に対して垂直に張り出すもので、凸部材5が橋台2に設置された状態で説明すると、鉛直方向(略鉛直方向も含む)に立設するストッパ52に対して、ストッパ拡張部53は水平方向(略水平方向も含む)に張り出す。図3では、ストッパ52の断面よりも大きな面積の鋼製プレートからなるストッパ拡張部53が、ストッパ52の頂部(上面)に溶接固定されている。ここでの固定方法も溶接手段に限らずボルト固定等種々の手法を用いることができ、ストッパ拡張部53の材質も強度上の設計要件を満足すれば鋼製のものに限らず種々のものを採用することができる。さらに、ストッパ拡張部53をストッパ52と別体としてそれぞれを固定する場合のほか、ストッパ52の製造段階でその一部を拡張してストッパ拡張部53を設けることもできる。   The stopper 52 can be provided with a stopper extension 53. As will be described later, by providing the stopper extension 53, the relative vertical displacement of the abutment 2 and the bridge girder 3 (hereinafter referred to as “relative vertical displacement”) can be limited. The stopper extension 53 projects perpendicularly to the axial direction of the stopper 52 (the vertical direction in FIG. 3). If the convex member 5 is installed on the abutment 2, the vertical direction (substantially vertical direction) will be described. The stopper extension 53 extends in a horizontal direction (including a substantially horizontal direction) with respect to the stopper 52 standing upright. In FIG. 3, a stopper extension 53 made of a steel plate having a larger area than the section of the stopper 52 is welded and fixed to the top (upper surface) of the stopper 52. The fixing method here is not limited to the welding means, and various methods such as bolt fixing can be used. The material of the stopper extension 53 is not limited to steel but can be various as long as it satisfies the design requirements for strength. Can be adopted. Furthermore, in addition to fixing the stopper extension 53 as a separate body from the stopper 52, the stopper extension 53 can be provided by expanding a part of the stopper 52 at the manufacturing stage.

橋台2に設置された凸部材5は、ストッパ52が凹部材6に係合しており、橋台2と橋桁3の間で相対的水平変位が生じると、ストッパ52が凹部材6の一部に衝突する。その際ストッパ52が受ける衝撃を緩和するために、ストッパ52周辺に緩衝材54を取り付けることができる。この緩衝材54は、クロロプレンゴムなど様々な材質のゴム製とすることが可能で、そのほか種々の樹脂をはじめあらゆる弾性体材料を選択することができる。   In the convex member 5 installed on the abutment 2, the stopper 52 is engaged with the concave member 6, and when a relative horizontal displacement occurs between the abutment 2 and the bridge girder 3, the stopper 52 becomes a part of the concave member 6. collide. In order to reduce the impact received by the stopper 52 at that time, a buffer material 54 can be attached around the stopper 52. The cushioning material 54 can be made of various materials such as chloroprene rubber, and various elastic materials including various resins can be selected.

ストッパ52に緩衝材54を取り付けておくと、橋台2と橋桁3の間で相対的水平変位が生じた際、ストッパ52に代わって緩衝材54が凹部材6の一部に衝突する。その衝撃力で緩衝材54は弾性変形を生じ、その変形によって衝撃エネルギーが低減され、この結果、ストッパ52や凹部材6が受ける衝撃力も緩和される。   If the buffer material 54 is attached to the stopper 52, the buffer material 54 collides with a part of the recess material 6 instead of the stopper 52 when a relative horizontal displacement occurs between the abutment 2 and the bridge girder 3. The shock absorbing material 54 is elastically deformed by the impact force, and the impact energy is reduced by the deformation. As a result, the impact force received by the stopper 52 and the recess member 6 is also reduced.

緩衝材54は、ストッパ52と凹部材6との間であればあらゆる場所に設けることができる。図4は、緩衝材54の設置箇所を例示した断面図である。図4(a)はストッパ52の胴部外周面(側面)に取り付けられた緩衝材54を示し、図4(b)はストッパ52の胴部外周面及び上面に取り付けられた緩衝材54を示している。図4(c)はストッパ52にストッパ拡張部53が設けられた場合であり、ストッパ52の胴部外周面及びストッパ拡張部53の下面(背面)に取り付けられた緩衝材54を示している。また、緩衝材54は、ストッパ52に取り付ける場合に限らず、図4(d)に示すように、凹部材6に取り付けることもできる。   The buffer material 54 can be provided at any location between the stopper 52 and the recess material 6. FIG. 4 is a cross-sectional view illustrating the installation location of the cushioning material 54. 4A shows the cushioning material 54 attached to the outer peripheral surface (side surface) of the body of the stopper 52, and FIG. 4B shows the cushioning material 54 attached to the outer peripheral surface and upper surface of the body of the stopper 52. ing. FIG. 4C shows a case where the stopper extension portion 53 is provided on the stopper 52, and shows the cushioning material 54 attached to the outer peripheral surface of the trunk portion of the stopper 52 and the lower surface (back surface) of the stopper extension portion 53. Further, the buffer material 54 is not limited to being attached to the stopper 52, but can also be attached to the concave portion 6 as shown in FIG.

(凹部材)
図5は凹部材6を説明する詳細図であり、(a)は凸部材5が係合される前の状態の凹部材6を示す斜視図、(b)は凸部材5が係合された後の状態の凹部材6を示す斜視図である。なお図6(b)は、凹部材6の設置状態を橋桁3側(つまり上方側)から見た状態であり、実際には橋桁3に遮られて見えないが、便宜上、ここでは橋桁3を省略して表している。この図に示すように、凹部材6は複数(図では2つ)の分割体7で構成されるものである。
(Concave material)
FIG. 5 is a detailed view for explaining the concave member 6, (a) is a perspective view showing the concave member 6 in a state before the convex member 5 is engaged, and (b) is a diagram showing the convex member 5 engaged. It is a perspective view which shows the recessed part material 6 of a back state. FIG. 6B shows a state in which the recessed member 6 is installed as viewed from the bridge girder 3 side (that is, the upper side), and is actually not obstructed by the bridge girder 3. Abbreviated. As shown in this figure, the concave member 6 is composed of a plurality (two in the figure) of divided bodies 7.

図5(a)に示すように、それぞれの分割体7は収容壁71によって形成されている。また図5(b)に示すように、2つの収容壁71を組み合わせると、収容壁71に周囲を囲まれた空間(以下、「収容空間72」という。)が形成され、この収容空間72内に凸部材5が係合される。なお図6(b)では、ストッパ拡張部53を含むストッパ52が、収容空間72内に係合されているが、ストッパ拡張部53も設けない場合はストッパ52が収容空間72内に係合されることとなる。なおここでいう「係合」とは、ストッパ52等の一部または全部が収容されている状態を意味する。   As shown in FIG. 5A, each divided body 7 is formed by a storage wall 71. Further, as shown in FIG. 5B, when the two accommodation walls 71 are combined, a space surrounded by the accommodation wall 71 (hereinafter referred to as “accommodation space 72”) is formed. The convex member 5 is engaged with the above. In FIG. 6B, the stopper 52 including the stopper extension 53 is engaged in the accommodation space 72. However, when the stopper extension 53 is not provided, the stopper 52 is engaged in the accommodation space 72. The Rukoto. The “engagement” here means a state in which a part or all of the stopper 52 or the like is accommodated.

収容壁71には、貫通するボルト孔71aが所定数(図では5個ずつ)設けられている。図2(a)に示すように、凹部材6は橋桁3の下フランジ部分に設置される。このとき収容壁71のボルト孔71aを利用して、2つの分割体7それぞれが橋桁3にボルト固定される。これら2つの分割体7は独立して設置されるものであり、お互いの分割体7を連結する必要はない。詳しくは、図5(b)や図6(a)に示すように、2つの分割体7の間に離隔Sを設けて、それぞれを分離して設置する。なお、凹部材6を設置する場所は、下フランジに限らず橋桁3の任意の場所とすることが可能で、設置する手段もボルト固定に限らず溶接など従来から用いられている種々の手段を採用できる。   The receiving wall 71 is provided with a predetermined number (5 in the drawing) of bolt holes 71a penetrating therethrough. As shown in FIG. 2A, the concave member 6 is installed on the lower flange portion of the bridge girder 3. At this time, each of the two divided bodies 7 is bolted to the bridge girder 3 using the bolt holes 71 a of the receiving wall 71. These two divided bodies 7 are installed independently, and it is not necessary to connect the divided bodies 7 to each other. Specifically, as shown in FIG. 5 (b) and FIG. 6 (a), a separation S is provided between the two divided bodies 7, and each is separated and installed. In addition, the place where the recessed member 6 is installed is not limited to the lower flange, and can be any place of the bridge girder 3. The means for installing is not limited to bolt fixing, and various conventionally used means such as welding can be used. Can be adopted.

図6は変位制限装置1を橋桁3に設置した状態を示す詳細図であり、図6(a)は変位制限装置1の設置状態を下方側から見た平面図、図6(b)は図6(a)のX−X矢視断面図、図6(c)は図6(a)のY−Y矢視断面図である。図6(a)に示すように、それぞれの分割体7は、平面視でコ字状を呈している。この分割体7は鋼製であり、収容壁71を一体としてコ字状に製造される。あるいは、コ字の3辺をそれぞれ別体の収容壁71とし、溶接等によって組み合わせた加工品とすることもできる。また、分割体7は鋼製のほか、強度上の設計要件を満足すれば種々の材料を使用することができる。   FIG. 6 is a detailed view showing a state in which the displacement limiting device 1 is installed on the bridge girder 3. FIG. 6 (a) is a plan view of the installation state of the displacement limiting device 1 seen from below, and FIG. 6 (b) is a diagram. 6 (a) is a cross-sectional view taken along the line XX, and FIG. 6 (c) is a cross-sectional view taken along the line YY of FIG. 6 (a). As shown to Fig.6 (a), each division body 7 is exhibiting U shape by planar view. The divided body 7 is made of steel, and is manufactured in a U-shape with the housing wall 71 integrated. Alternatively, the three sides of the U-shape can be used as separate housing walls 71 and combined with welding or the like. The divided body 7 is made of steel, and various materials can be used as long as it satisfies the design requirements for strength.

分割体7の形状はコ字状に限らず、L字状のほか種々の形状とすることができるし、図7に示すように、凹部材6を4つの分割体7からなるものとするなど、3以上の分割数とすることもできる。   The shape of the divided body 7 is not limited to the U-shape, and can be various shapes other than the L-shape, and the concave member 6 is composed of four divided bodies 7 as shown in FIG. The number of divisions may be 3 or more.

図6(a)に示すように2つの分割体7を橋桁3に設置すると、収容壁71で囲まれた収容空間72が形成される。この収容空間72内には、図6(b)に示すようにストッパ拡張部53を含むストッパ52が係合される。   As shown in FIG. 6A, when the two divided bodies 7 are installed on the bridge girder 3, an accommodation space 72 surrounded by the accommodation wall 71 is formed. A stopper 52 including a stopper extension 53 is engaged in the housing space 72 as shown in FIG.

図6(c)に示すように、一方の分割体7の収容壁71と、他方の分割体7の収容壁71との間には、離隔Sが設けられ、2つの分割体7は分離して設置されている。また、これらの分割体7はお互いを連結する必要がない。なお、図7に示すように4分割された分割体7を設置する場合は、全て連結しない全部分離とすることもできるし、橋軸方向(あるいは橋軸直角方向)に並んだ分割体7同士のみを連結するなど一部連結とすることもできる。   As shown in FIG. 6 (c), a separation S is provided between the accommodation wall 71 of one divided body 7 and the accommodation wall 71 of the other divided body 7, and the two divided bodies 7 are separated. Installed. Further, these divided bodies 7 do not need to be connected to each other. In addition, when installing the division body 7 divided into four as shown in FIG. 7, it can also be set as the isolation | separation which does not connect all, and the division bodies 7 arranged in the bridge-axis direction (or bridge-axis perpendicular direction) mutually It is also possible to make a partial connection, such as connecting only.

分割体7同士の間に設けられる離隔Sの幅は、任意に設計することができるものであり、略接触する程度の微小幅とすることも可能である。また図6(a)では、それぞれの分割体7が橋軸直角方向に並べられ、橋軸方向に2箇所の離隔Sが設けられる配置としているが、このような配置に限らず、それぞれの分割体7を橋軸方向に並べて橋軸直角方向に2箇所の離隔Sが設けられるような配置(図6(a)を90度回転した配置)とすることもできる。   The width of the separation S provided between the divided bodies 7 can be arbitrarily designed, and can be set to a very small width so as to be substantially in contact with each other. In FIG. 6A, the divided bodies 7 are arranged in a direction perpendicular to the bridge axis, and two spaces S are provided in the bridge axis direction. It is also possible to arrange the bodies 7 in the bridge axis direction so that two spaces S are provided in a direction perpendicular to the bridge axis (an arrangement obtained by rotating FIG. 6A by 90 degrees).

分割体7には、図5(a)、図6(a)に示される障害板73を設けることもできる。この障害板73は鋼製であり、分割体7に溶接固定されている。凹部材6を橋桁3に設置したときに、障害板73と橋桁3との間(収容空間72内)にストッパ拡張部53を収容するため、障害板73は分割体7の下端付近(凹部材6設置時)に設けられる。なお、障害板73は鋼製のほか、強度上の設計要件を満足すれば種々の材料を使用することができるし、障害板73も分割体7の一体として(一部として)製造することもできる。   The divided body 7 may be provided with an obstacle plate 73 shown in FIGS. 5 (a) and 6 (a). The obstacle plate 73 is made of steel and is fixed to the divided body 7 by welding. When the recess member 6 is installed on the bridge girder 3, the stopper plate 73 is accommodated between the obstacle plate 73 and the bridge girder 3 (within the accommodation space 72). 6). The obstruction plate 73 can be made of steel, and various materials can be used as long as the design requirements on strength are satisfied. The obstruction plate 73 can also be manufactured as an integral part of the divided body 7. it can.

凹部材6を橋桁3に設置すると、収容壁71と障害板73によって収容空間72が形成され(図9(c)の破線範囲)、図5(b)に示すようにストッパ拡張部53がこの収容空間72内に収容される。図6(b)からもわかるように、2つの障害板73の間に形成される間隙はストッパ拡張部53の幅よりも狭小であるため、ストッパ拡張部53は障害板73の間を通過できず、つまりストッパ拡張部53は収容空間72内から下方側へ抜け出すことができない。換言すれば、ストッパ拡張部53を具備する凸部材5は、鉛直方向の移動範囲を凹部材6の収容空間72内に限定されており、この結果、凸部材5を固定している橋台2と、凹部材6が設置された橋桁3との、相対的鉛直変位が制限されることとなる。   When the recessed member 6 is installed on the bridge girder 3, the accommodation space 72 is formed by the accommodation wall 71 and the obstacle plate 73 (the range of the broken line in FIG. 9C), and the stopper extension 53 is formed as shown in FIG. 5B. It is accommodated in the accommodating space 72. As can be seen from FIG. 6B, since the gap formed between the two obstacle plates 73 is narrower than the width of the stopper extension 53, the stopper extension 53 can pass between the obstacle plates 73. In other words, the stopper extension 53 cannot come out downward from the accommodation space 72. In other words, the convex member 5 provided with the stopper extension 53 has a vertical movement range limited to the accommodation space 72 of the concave member 6, and as a result, the abutment 2 fixing the convex member 5 and the abutment 2. And the relative vertical displacement with the bridge girder 3 in which the recessed part material 6 was installed will be restrict | limited.

(変位制限装置)
本願発明の変位制限装置1の作用について、図8に基づいて説明する。図8のうち、(a)は橋台2と橋桁3に相対的水平変位が生じたときの変位制限装置1の作用について説明するモデル図であり、(b)は橋台2と橋桁3に相対的鉛直変位が生じたときの変位制限装置1の作用について説明するモデル図である。
(Displacement limiting device)
The operation of the displacement limiting device 1 of the present invention will be described with reference to FIG. 8A is a model diagram for explaining the operation of the displacement limiting device 1 when relative horizontal displacement occurs between the abutment 2 and the bridge girder 3, and FIG. 8B is relative to the abutment 2 and the bridge girder 3. It is a model figure explaining the effect | action of the displacement limiting apparatus 1 when a vertical displacement arises.

まず、図8(a)に基づいて変位制限装置1の作用を説明する。地震等により橋梁に水平荷重が作用すると、橋台2は水平方向(矢印H方向)に振動し、また橋桁3も同じく水平方向に振動する。通常、橋台2と橋桁3の固有振動数は異なるので、橋台2と橋桁3との間には相対的水平変位が生じる。一方、橋台2に設置された凸部材5のストッパ52と、橋桁3に設置された凹部材6の収容壁71との間には、図に示すように水平クリアランスδが設けられている。すなわち、橋台2と橋桁3との間で相対的水平変位が生じると、ストッパ52(あるいは橋桁3側の収容壁71)は水平クリアランスδの分だけ自由に水平移動することができる。換言すれば、ストッパ52が水平クリアランスδを超えて移動すると、ストッパ52又はストッパ拡張部53(あるいはこれらに取り付けられた緩衝材54)が収容壁71(あるいは障害板73)に衝突するため、ストッパ52は収容壁71(あるいは障害板73)に遮られてそれ以上移動することができない。このように変位制限装置1は、ストッパ52(あるいは収容壁71)の変位量を水平クリアランスδ以下に制限することが可能であり、すなわち橋台2と橋桁3との間の相対的水平変位を水平クリアランスδ以下に制限することができるのである。 First, the operation of the displacement limiting device 1 will be described with reference to FIG. When a horizontal load is applied to the bridge due to an earthquake or the like, the abutment 2 vibrates in the horizontal direction (arrow H direction), and the bridge girder 3 also vibrates in the horizontal direction. Usually, since the natural frequency of the abutment 2 and the bridge girder 3 is different, a relative horizontal displacement occurs between the abutment 2 and the bridge girder 3. On the other hand, the stopper 52 of the convex member 5 disposed in abutment 2, between the housing wall 71 of the concave member 6 installed on the bridge girder 3, the horizontal clearance [delta] H is provided as shown in FIG. That is, when the relative horizontal displacement occurs between the abutment 2 and the bridge girder 3, (containing wall 71 or bridge beam 3 side) stopper 52 can be freely moved horizontally by the amount of horizontal clearance [delta] H. In other words, the stopper 52 moves beyond the horizontal clearance [delta] H, the stopper 52 or the stopper extension 53 (or the cushioning material 54 attached thereto) collide with the housing wall 71 (or disorder plate 73), The stopper 52 is blocked by the accommodation wall 71 (or the obstacle plate 73) and cannot move any further. Thus displacement limiting device 1, it is possible to limit the displacement of the stopper 52 (or housing wall 71) below the horizontal clearance [delta] H, i.e. the relative horizontal displacement between the abutment 2 and the bridge girder 3 it is possible to limit below the horizontal clearance [delta] H.

次に、図8(b)に基づいて変位制限装置1の作用を説明する。地震等により橋梁に鉛直荷重が作用すると、橋台2は鉛直方向(矢印V方向)に振動し、また橋桁3も同じく鉛直方向に振動し、橋台2と橋桁3との間には相対的鉛直変位が生じる。一方、凸部材5のストッパ拡張部53と、凹部材6の障害板73との間には、図に示すように鉛直クリアランスδが設けられている。すなわち、橋台2と橋桁3との間で相対的鉛直変位が生じると、ストッパ拡張部53(あるいは橋桁3側の障害板73)は鉛直クリアランスδの分だけ自由に鉛直移動することができる。換言すれば、ストッパ拡張部53が鉛直クリアランスδを超えて移動すると、ストッパ拡張部53は障害板73が障害となってそれ以上移動することができない。このように変位制限装置1は、ストッパ拡張部53(あるいは障害板73)の変位量を鉛直クリアランスδ以下に制限することが可能であり、すなわち橋台2と橋桁3との間の相対的鉛直変位を鉛直クリアランスδ以下に制限することができるのである。 Next, the operation of the displacement limiting device 1 will be described based on FIG. When a vertical load is applied to the bridge due to an earthquake or the like, the abutment 2 vibrates in the vertical direction (arrow V direction), and the bridge girder 3 vibrates in the same vertical direction, and the relative vertical displacement between the abutment 2 and the bridge girder 3 Occurs. On the other hand, the stopper extension 53 of the projecting member 5 and between the fault plate 73 of the concave member 6, the vertical clearance [delta] V is provided as shown in FIG. That is, when relative vertical displacement is generated between the abutment 2 and the bridge girder 3, (Failure plate 73 or bridge beam 3 side) stopper extension 53 may be freely vertically moved by the amount of vertical clearance [delta] V. In other words, the stopper extension 53 moves beyond the vertical clearance [delta] V, the stopper extension 53 may not be able to fault plate 73 is moved an obstacle more. Thus displacement limiting device 1, it is possible to limit the displacement of the stopper extension 53 (or disorder plate 73) below the vertical clearance [delta] V, i.e. the relative vertical between the abutment 2 and the bridge girder 3 it is possible to limit the displacement below a vertical clearance [delta] V.

(変位制限装置の設置手順)
本願発明の変位制限装置1を既設橋に設置する手順について、図9(a)〜(c)に基づいて説明する。なおここで、説明する手順はあくまで一例であり、本願発明の変位制限装置1は必ずしもこの手順で設置されなければならないものではない。またここでは、橋桁3がI形鋼であり、このI形鋼の下フランジに変位制限装置1を設置する場合を例示しているが、もちろんI形鋼以外の橋桁3に設置する場合でも、橋台2などの下部工に設置する場合でも、この設置手順を採用することができる。
(Installation procedure of displacement limiter)
A procedure for installing the displacement limiting device 1 of the present invention on an existing bridge will be described with reference to FIGS. In addition, the procedure demonstrated here is an example to the last, and the displacement limiting apparatus 1 of this invention does not necessarily have to be installed in this procedure. In addition, here, the bridge girder 3 is an I-shaped steel, and the case where the displacement limiting device 1 is installed on the lower flange of the I-shaped steel is illustrated, but of course, even when installed on the bridge girder 3 other than the I-shaped steel, This installation procedure can be adopted even when installing in a substructure such as the abutment 2.

まず図9(a)で示すように、凹部材6を構成する分割体7を橋桁3にボルト固定する。なおこの段階では、凹部材6を構成する複数の分割体7のうち一部のみ設置するものであり、図では2分割されたうち一方の分割体7(図では左側)を取り付けている。このように、凹部材6の一部、つまり一方の分割体7を設置する工程を、第1次凹部設置工程と呼ぶ。   First, as shown in FIG. 9A, the divided body 7 constituting the concave member 6 is bolted to the bridge girder 3. At this stage, only a part of the plurality of divided bodies 7 constituting the concave member 6 is installed, and one divided body 7 (left side in the figure) is attached in the figure. In this way, a step of installing a part of the concave member 6, that is, one of the divided bodies 7 is called a primary concave portion installing step.

つぎに図9(b)で示すように、凸部材5を橋台2(又は橋台2に設けた鋼製ブラケット)にボルト固定する。ここで取り付ける凸部材5は、鋼製の固定プレート51,鋼製のストッパ52,鋼製のストッパ拡張部53,クロロプレンゴム製の緩衝材54が一体に形成されたものである。   Next, as shown in FIG. 9B, the convex member 5 is bolted to the abutment 2 (or a steel bracket provided on the abutment 2). The convex member 5 attached here is formed by integrally forming a steel fixing plate 51, a steel stopper 52, a steel stopper extension 53, and a cushioning material 54 made of chloroprene rubber.

凸部材5を橋台2に設置する際は、所定の位置に、つまりストッパ52が収容空間72内に係合されるように配置する必要がある。とくに、ストッパ拡張部53が下向きに変位するときに、障害板73が確実に障害となって変位制限されるような配置となるよう留意する。このように凸部材5を橋台2に設置する工程を、凸部設置工程と呼ぶ。   When the convex member 5 is installed on the abutment 2, it is necessary to arrange the convex member 5 at a predetermined position, that is, so that the stopper 52 is engaged in the accommodation space 72. In particular, when the stopper extension 53 is displaced downward, attention should be paid to the arrangement in which the obstacle plate 73 reliably becomes an obstacle and the displacement is limited. The process of installing the convex member 5 on the abutment 2 in this way is called a convex part installation process.

最後に図9(c)で示すように、凹部材6を構成する残りの分割体7を橋桁3にボルト固定する。残りの分割体7とは、第1次凹部設置工程で取り付けた分割体7を除く分割体7のことであり、図では左側の分割体7を取り付けている。左側の分割体7を取り付ける際は、ストッパ52が収容空間72内に係合されるように左側の分割体7を配置する。また、ストッパ拡張部53の下方に障害板73が位置する配置となるよう留意する。このように、残りの分割体7を取り付けて凹部材6の設置を完成させる工程を、第2次凹部設置工程と呼ぶ。   Finally, as shown in FIG. 9 (c), the remaining divided body 7 constituting the concave member 6 is bolted to the bridge girder 3. The remaining divided bodies 7 are the divided bodies 7 excluding the divided bodies 7 attached in the first recess installation step, and the left divided bodies 7 are attached in the drawing. When the left divided body 7 is attached, the left divided body 7 is arranged so that the stopper 52 is engaged in the accommodating space 72. In addition, care should be taken so that the obstacle plate 73 is positioned below the stopper extension 53. Thus, the process of attaching the remaining divided body 7 and completing the installation of the recess material 6 is referred to as a secondary recess installation process.

なおこのとき、第1次凹部設置工程で取り付けた分割体7と、第2次凹部設置工程で取り付けた分割体7とは、それぞれ分離して設置し、例えば離隔Sを設けて設置する。そして、分離して設置された後もそれぞれの分割体7(図では左右の分割体7)を連結する必要はない。   At this time, the divided body 7 attached in the first recessed portion installing step and the divided body 7 attached in the second recessed portion installing step are separately installed, for example, provided with a separation S. And it is not necessary to connect each division body 7 (left and right division bodies 7 in a figure) even after installing separately.

ここでは、第1次凹部設置工程、凸部設置工程、第2次凹部設置工程、の順で取り付ける方法を示したが、これに代えて、凸部設置工程の後に、第1次凹部設置工程、第2次凹部設置工程、の順で取り付けることもできる。この場合の凸部設置工程では、ストッパ52が収容空間72内に係合されるように配慮する必要がなく、単に、凸部材5を橋台2(又は橋台2に設けた鋼製ブラケット)にボルト固定する。一方、第1次凹部設置工程では、ストッパ52が収容空間72内に係合されるように、分割体7を配置する必要がある。この点に配慮して、分割体7(凹部材6を構成する複数の分割体7のうち一部のみ)は橋桁3にボルト固定される。もちろんこの場合も、離して設置された(第1次凹部設置工程と第2次凹部設置工程で設置された)分割体7を連結する必要はない。   Here, although the method of attaching in order of a primary recessed part installation process, a convex part installation process, and a secondary recessed part installation process was shown, it replaces with this and a primary recessed part installation process is carried out after a convex part installation process. It can also be attached in the order of the secondary recess installation step. In this case, it is not necessary to consider that the stopper 52 is engaged in the accommodation space 72, and the convex member 5 is simply bolted to the abutment 2 (or a steel bracket provided on the abutment 2). Fix it. On the other hand, in the first recessed portion installation step, it is necessary to arrange the divided body 7 so that the stopper 52 is engaged in the accommodation space 72. Considering this point, the divided body 7 (only a part of the plurality of divided bodies 7 constituting the concave member 6) is bolted to the bridge girder 3. Of course, in this case as well, it is not necessary to connect the divided bodies 7 installed separately (installed in the primary recess installation process and the secondary recess installation process).

ここで示した設置手順によれば、あらかじめ凸部材5と凹部材6を組み合わせた状態(ストッパ52を収容空間72内に係合させた状態)で変位制限装置1を設置する必要がないため、極めて設置作業が容易となる。加えて、凹部材6が分割されているので、従来よりもコンパクトで軽量の分割体7を取り扱うこととなり、施工性が向上するとともに、狭隘な作業空間であっても安全に作業できるという効果がある。なお、ここでは設置手順について説明したが、取り外す場合も同様の効果を奏するので、取替えが容易となって維持管理性にも優れる。   According to the installation procedure shown here, it is not necessary to install the displacement limiting device 1 in a state where the convex member 5 and the concave member 6 are combined in advance (a state where the stopper 52 is engaged in the accommodation space 72). Installation work becomes extremely easy. In addition, since the concave member 6 is divided, the compact and lighter divided body 7 is handled than before, so that the workability is improved and the work can be safely performed even in a narrow work space. is there. In addition, although the installation procedure was demonstrated here, since the same effect is produced also when removing, replacement | exchange is easy and it is excellent also in maintainability.

本願発明の変位制限装置の設置方法、橋桁の変位制限構造、及び変位制限装置は、道路橋や鉄道橋、河川橋や高架橋など、種々の橋に利用することができる。また、橋桁と橋台など支持躯体と橋桁との連結に限られず、トンネル坑門や擁壁、あるいはビル等の建築構造物など、様々な構造物間に取り付けて応用することができる。 The displacement limiting device installation method, bridge girder displacement limiting structure, and displacement limiting device of the present invention can be used for various bridges such as road bridges, railway bridges, river bridges and viaducts. Further, the present invention is not limited to the connection between a supporting girder and a bridge girder such as a bridge girder and an abutment, and can be applied by attaching between various structures such as a tunnel gate, a retaining wall, or a building structure such as a building.

1 変位制限装置
2 橋台
3 橋桁
4 支承
4a 固定支承
4b 可動支承
5 凸部材
51 固定プレート
51a (固定プレートの)ボルト孔
52 ストッパ
53 ストッパ拡張部
54 緩衝材
6 凹部材
7 分割体
71 収容壁
71a (収容壁の)ボルト孔
72 収容空間
73 障害板
Br ブラケット
S 離隔
δ 水平クリアランス
δ 鉛直クリアランス
DESCRIPTION OF SYMBOLS 1 Displacement restriction device 2 Abutment 3 Bridge girder 4 Bearing 4a Fixed bearing 4b Movable bearing 5 Convex member 51 Fixed plate 51a (fixed plate) Bolt hole 52 Stopper 53 Stopper extension 54 Buffer material 6 Concave material 7 Divided body 71 Housing wall 71a ( Bolt hole 72 in the receiving wall
73 Obstacle plate Br Bracket S Separation δ H Horizontal clearance δ V Vertical clearance

Claims (12)

橋台や橋脚などの支持躯体と、その上に支承により支持されている橋桁との間の支持空間に設置して、橋桁と支持躯体との水平方向の相対変位又はその水平方向及び鉛直方向上方への相対変位を制限し得る変位制限装置を設置する方法において、
前記変位制限装置は凸部材と凹部材とを備え、凸部材はストッパを備え、凹部材は2以上の分割体を備え、それぞれの分割体は前記ストッパの外周の一部を囲うことのできる収容壁とその内側の収容凹部を備え、凸部材が橋桁と支持躯体のいずれか一方に固定され、凹部材が前記凸部材の外周を囲って橋桁と支持躯体の他方に固定され、これら凸部材と凹部材とによって橋桁と支持躯体の前記相対変位を制限することができるものであり、
前記支持空間にその側方から前記変位制限装置の凸部材を配置して橋桁と支持躯体のいずれか一方に固定する凸部材設置工程と、
前記凸部材設置工程により凸部材を設置固定してから、前記支持空間の側方から当該支持空間内であって前記凸部材のストッパの外側に、前記凹部材の2以上の分割体を個別に配置して橋桁と支持躯体のいずれか他方に固定し、この配置固定を分割体の数だけ行うことにより、凸部材のストッパの外側を前記2以上の分割体の収容壁で囲うとともに当該ストッパの外周面と分割体の収容凹部内周面との間に隙間を設ける工程を備えた、
ことを特徴とする変位制限装置の設置方法。
Installed in a support space between a support frame such as an abutment or pier and a bridge girder supported by a support on it, and the horizontal displacement of the bridge girder and the support frame in the horizontal direction or upward in the horizontal and vertical directions In a method of installing a displacement limiting device capable of limiting the relative displacement of
The displacement limiting device includes a convex member and a concave member, the convex member includes a stopper, the concave member includes two or more divided bodies, and each of the divided bodies can enclose a part of the outer periphery of the stopper. A convex member is fixed to one of the bridge girder and the support case, and a concave member is fixed to the other of the bridge girder and the support case, and the convex member is fixed to the other of the bridge girder and the support case. The relative displacement of the bridge girder and the support frame can be limited by the recess material,
A projecting member installation step of disposing the projecting member of the displacement limiting device from the side to the support space and fixing it to either the bridge girder or the support housing;
After the convex member is installed and fixed by the convex member installation step, two or more divided parts of the concave member are individually provided in the support space from the side of the support space and outside the stopper of the convex member. By arranging and fixing to the other one of the bridge girder and the support frame, and performing this arrangement and fixation by the number of divided bodies, the outer side of the stopper of the convex member is surrounded by the housing wall of the two or more divided bodies and the stopper Comprising a step of providing a gap between the outer peripheral surface and the inner peripheral surface of the accommodating recess of the divided body,
An installation method of a displacement limiting device characterized by the above.
橋台や橋脚などの支持躯体と、その上に支承により支持されている橋桁との間の支持空間に設置して、橋桁と支持躯体との水平方向の相対変位又はその水平方向及び鉛直方向上方への相対変位を制限し得る変位制限装置を設置する方法において、
前記変位制限装置は凸部材と凹部材とを備え、凸部材はストッパを備え、凹部材は2以上の分割体を備え、それぞれの分割体は前記ストッパの外周の一部を囲うことのできる収容壁とその内側の収容凹部を備え、凸部材が橋桁と支持躯体のいずれか一方に固定され、凹部材が前記凸部材の外周を囲って橋桁と支持躯体の他方に固定され、これら凸部材と凹部材とによって橋桁と支持躯体の前記相対変位を制限することができるものであり、
前記支持空間の側方からその支持空間内に前記変位制限装置の一部の分割体を配置して橋桁と支持躯体のいずれか一方に固定する分割体設置工程と、
前記分割体設置工程により分割体を設置固定してから、前記支持空間の側方から当該支持空間内であって前記分割体の収容凹部の内側に変位制限装置の凸部材を配置して橋桁と支持躯体のいずれか他方に固定する凸部材設置工程と、
前記分割体設置工程により一部の分割体を設置固定し、その後に前記凸部材設置工程により凸部材を設置固定してから、前記支持空間の側方からその支持空間内であって前記凸部材のストッパの外側に他の分割体を配置して先に分割体を固定した橋桁又は支持躯体に固定することにより、この分割体と先に設置固定されている分割体とにより前記ストッパの外周を囲うとともに当該ストッパの外周面と分割体の収容凹部内周面との間に隙間を設ける工程を備えた、
ことを特徴とする変位制限装置の設置方法。
Installed in a support space between a support frame such as an abutment or pier and a bridge girder supported by a support on it, and the horizontal displacement of the bridge girder and the support frame in the horizontal direction or upward in the horizontal and vertical directions In a method of installing a displacement limiting device capable of limiting the relative displacement of
The displacement limiting device includes a convex member and a concave member, the convex member includes a stopper, the concave member includes two or more divided bodies, and each of the divided bodies can enclose a part of the outer periphery of the stopper. A convex member is fixed to one of the bridge girder and the support case, and a concave member is fixed to the other of the bridge girder and the support case, and the convex member is fixed to the other of the bridge girder and the support case. The relative displacement of the bridge girder and the support frame can be limited by the recess material,
A split body installation step of disposing a partial split body of the displacement limiting device in the support space from the side of the support space and fixing it to either the bridge girder or the support housing;
After the divided body is installed and fixed by the divided body installation step, the convex member of the displacement limiting device is disposed in the support space from the side of the support space and inside the housing recess of the divided body, and the bridge girder. A convex member installation step for fixing to either one of the support housings;
A part of the divided body is installed and fixed by the divided body installation step, and then the convex member is installed and fixed by the convex member installation step, and then the convex member is located in the support space from the side of the support space. By placing another divided body on the outside of the stopper and fixing it to the bridge girder or the support frame on which the divided body is fixed first, the outer periphery of the stopper is formed by this divided body and the divided body that has been previously fixed. The step of enclosing and providing a gap between the outer peripheral surface of the stopper and the inner peripheral surface of the housing recess of the divided body,
An installation method of a displacement limiting device characterized by the above.
橋台や橋脚などの支持躯体と、その上に支承により支持されている橋桁との間の支持空間に設置して、橋桁と支持躯体との水平方向の相対変位又はその水平方向及び鉛直方向上方への相対変位を制限し得る変位制限装置において、
前記変位制限装置は凸部材と凹部材とを備え、凸部材は固定プレートと当該固定プレートからそれと鉛直方向に突出するストッパを備え、凹部材は2以上の分割体を備え、それぞれの分割体はストッパの外周の一部を囲うことのできる収容壁とその内側の収容凹部を備え、
凸部材は前記支持空間の側方から当該支持空間内に配置して橋桁と支持躯体とのいずれか一方に固定することができ、
凹部材の分割体は、前記支持空間にその側方から個別に配置して橋桁と支持躯体とのいずれか他方に固定することにより前記ストッパの外周を2以上の分割体で囲うことができ、
前記2以上の分割体の収容凹部は、前記ストッパの外周を囲うことによりストッパの外周面と分割体の収容壁の内周面との間に隙間ができる広さであり、
前記2以上の分割体を配置固定した凹部材とその凹部材で囲まれるストッパとは、橋桁と支持躯体との水平方向又は水平方向及び鉛直方向への相対変位発生時に衝突してその相対変位を制限することができる、
ことを特徴とする変位制限装置。
Installed in a support space between a support frame such as an abutment or pier and a bridge girder supported by a support on it, and the horizontal displacement of the bridge girder and the support frame in the horizontal direction or upward in the horizontal and vertical directions In a displacement limiting device capable of limiting the relative displacement of
The displacement limiting device includes a convex member and a concave member, the convex member includes a fixed plate and a stopper protruding vertically from the fixed plate, the concave member includes two or more divided bodies, and each divided body includes A housing wall capable of enclosing a part of the outer periphery of the stopper and a housing recess inside thereof,
The convex member can be arranged in the support space from the side of the support space and fixed to either the bridge girder or the support frame,
The recessed member divided body can be individually arranged in the support space from the side thereof and fixed to either the bridge girder or the supporting frame to surround the outer periphery of the stopper with two or more divided bodies,
The housing recesses of the two or more divided bodies are wide enough to create a gap between the outer peripheral surface of the stopper and the inner peripheral surface of the housing wall of the divided body by surrounding the outer periphery of the stopper,
The recess material in which the two or more divided bodies are arranged and fixed, and the stopper surrounded by the recess material collide with each other when the bridge girder and the supporting frame collide in the horizontal direction or in the horizontal direction and the vertical direction, and the relative displacement occurs. Can be restricted,
A displacement limiting device characterized by that.
請求項3記載の変位制限装置において、The displacement limiting device according to claim 3,
凸部材のストッパが角柱状であり、分割体の収容凹部の内面が平面であり、前記収容凹部の内面は水平方向の相対変位発生時にストッパの外周面と面衝突するようにした、The stopper of the convex member is prismatic, the inner surface of the accommodating recess of the divided body is flat, and the inner surface of the accommodating recess is in surface collision with the outer peripheral surface of the stopper when a horizontal relative displacement occurs.
ことを特徴とする変位制限装置。A displacement limiting device characterized by that.
請求項3又は請求項4記載の変位制限装置において、
ストッパの先端側に、当該ストッパの外周面外側に水平に張り出すストッパ拡張部が設けられ、
分割体は2以上を支持空間内に配置固定することにより、ストッパの外周であってストッパ拡張部の下方を囲うことができる、
ことを特徴とする変位制限装置。
In the displacement limiting device according to claim 3 or 4 ,
On the tip side of the stopper, there is provided a stopper extension that projects horizontally to the outside of the outer peripheral surface of the stopper,
By dividing and fixing two or more of the divided bodies in the support space, the outer periphery of the stopper and the lower part of the stopper extension can be enclosed.
A displacement limiting device characterized by that.
請求項3から請求項5のいずれか1項に記載の変位制限装置において、
分割体は障害板を備え、障害板は水平方向の相対変位発生時にストッパの外周面と衝突できるように、分割体の収容壁から収容凹部内に水平に突設された、
ことを特徴とする変位制限装置。
The displacement limiting device according to any one of claims 3 to 5 ,
The divided body is provided with an obstacle plate, and the obstacle plate is projected horizontally from the accommodating wall of the divided body into the accommodating recess so that it can collide with the outer peripheral surface of the stopper when the relative displacement in the horizontal direction occurs.
A displacement limiting device characterized by that.
請求項3から請求項6のいずれか1項に記載の変位制限装置において、
ストッパの外周と障害板の先端のいずれか一方に弾性のある緩衝材を備えた、
ことを特徴とする変位制限装置。
The displacement limiting device according to any one of claims 3 to 6,
Equipped with an elastic cushioning material on either the outer periphery of the stopper or the tip of the obstacle plate,
A displacement limiting device characterized by that.
橋台や橋脚などの支持躯体と、その上に、支承により支持されている橋桁との間の支持空間に、橋桁と支持躯体との水平方向又は水平方向及び鉛直方向の相対変位を制限し得る変位制限装置を設置した橋桁の変位制限構造において、
前記変位制限装置が請求項3記載の変位制限装置であり、
前記変位制限装置の凸部材が橋桁と支持躯体の間の支持空間に設置され、橋桁と支持躯体のいずれか一方に固定されて、当該凸部材のストッパが前記支持空間内に突出し、
2以上の分割体が前記支持空間に設置され、橋桁と支持躯体のいずれか他方に固定され、それら分割体の収容壁で前記ストッパの外周が囲われて、ストッパの外周面と分割体の収容凹部内面との間に隙間が形成され、
橋桁と支持躯体との前記相対変位発生時に、前記2以上の分割体とそれらで囲まれたストッパとが衝突してその相対変位が制限される構造である、
ことを特徴とする橋桁の変位制限構造。
Displacement that can limit the horizontal or horizontal and vertical relative displacement between the bridge girder and the support frame in the support space between the support frame such as abutment and pier and the bridge girder supported by the support. In the bridge girder displacement restriction structure with a restriction device installed,
The displacement limiting device according to claim 3,
The convex member of the displacement limiting device is installed in the support space between the bridge girder and the support housing, fixed to either the bridge girder or the support housing, and the stopper of the convex member protrudes into the support space,
Two or more divided bodies are installed in the support space, fixed to either the bridge girder or the support housing, and the outer periphery of the stopper is surrounded by the housing wall of the divided bodies, so that the outer peripheral surface of the stopper and the divided body are accommodated. A gap is formed between the inner surface of the recess,
When the relative displacement between the bridge girder and the support frame occurs, the two or more divided bodies and the stopper surrounded by them collide, and the relative displacement is limited.
Displacement limiting structure of bridge girder characterized by that.
橋台や橋脚などの支持躯体と、その上に、支承により支持されている橋桁との間の支持空間に、橋桁と支持躯体との水平方向又は水平方向及び鉛直方向の相対変位を制限し得る変位制限装置を設置した橋桁の変位制限構造において、
前記変位制限装置が請求項4記載の、ストッパが角柱状である変位制限装置であり、
前記変位制限装置の凸部材が橋桁と支持躯体の間の支持空間に配置され、橋桁と支持躯体のいずれか一方に固定されて、当該凸部材の角柱状のストッパが前記支持空間内に突出し、
2以上の分割体が前記支持空間に配置され、橋桁と支持躯体のいずれか他方に固定されて、それら分割体の収容壁で前記角柱状のストッパの外周が囲われ、角柱状のストッパの外周面と分割体の収容凹部内面との間に隙間が形成され、
橋桁と支持躯体との相対変位発生時に、前記2以上の分割体とそれらで囲まれた角柱状のストッパとが面衝突して、その相対変位が制限される構造である、
ことを特徴とする橋桁の変位制限構造。
Displacement that can limit the horizontal or horizontal and vertical relative displacement between the bridge girder and the support frame in the support space between the support frame such as abutment and pier and the bridge girder supported by the support. In the bridge girder displacement restriction structure with a restriction device installed,
The displacement limiting device according to claim 4, wherein the stopper has a prismatic shape,
The convex member of the displacement limiting device is disposed in a support space between the bridge girder and the support frame, and is fixed to either the bridge girder or the support frame, and the prismatic stopper of the convex member protrudes into the support space,
Two or more divided bodies are arranged in the support space, fixed to one of the bridge girder and the support housing, and the outer periphery of the prismatic stopper is surrounded by the housing wall of the divided bodies. A gap is formed between the surface and the inner surface of the accommodating recess of the divided body,
When the relative displacement between the bridge beam and the support frame occurs, the two or more divided bodies and the prismatic stopper surrounded by them collide with each other, and the relative displacement is limited.
Displacement limiting structure of bridge girder characterized by that.
橋台や橋脚などの支持躯体と、その上に、支承により支持されている橋桁との間の支持空間に、橋桁と支持躯体との水平方向又は水平方向及び鉛直方向の相対変位を制限し得る変位制限装置を設置した橋桁の変位制限構造において、
前記変位制限装置が請求項5記載の、凸部材がストッパ拡張部を備えた変位制限装置であり、
凸部材が橋桁と支持躯体の間の支持空間に配置され、橋桁と支持躯体のいずれか一方に固定されて当該凸部材のストッパが前記支持空間に突出し、
2以上の分割体が前記支持空間に配置されて橋桁と支持躯体のいずれか他方に固定され、前記ストッパの外周であってストッパ拡張部の下方が2以上の分割体の収容壁で囲まれてストッパと分割体の収容凹部内面との間に隙間が形成され、
前記2以上の分割体とストッパ及びストッパ拡張部とが、橋桁と支持躯体との前記相対変位発生時に衝突してそれら相対変位が制限される構造である、
ことを特徴とする橋桁の変位制限構造。
Displacement that can limit the horizontal or horizontal and vertical relative displacement between the bridge girder and the support frame in the support space between the support frame such as abutment and pier and the bridge girder supported by the support. In the bridge girder displacement restriction structure with a restriction device installed,
The displacement limiting device according to claim 5, wherein the convex member is a displacement limiting device provided with a stopper extension.
The convex member is disposed in the support space between the bridge girder and the support housing, fixed to either the bridge girder or the support housing, and the stopper of the convex member protrudes into the support space,
Two or more divided bodies are arranged in the support space and fixed to either the bridge girder or the support housing, and the outer periphery of the stopper is surrounded by the housing walls of the two or more divided bodies below the stopper extension. A gap is formed between the stopper and the inner surface of the accommodating recess of the divided body,
The two or more divided bodies, the stopper and the stopper extension portion are structured to collide when the relative displacement occurs between the bridge girder and the support housing and to limit the relative displacement.
Displacement limiting structure of bridge girder characterized by that.
橋台や橋脚などの支持躯体と、その上に、支承により支持されている橋桁との間の支持空間に、橋桁と支持躯体との水平方向又は水平方向及び鉛直方向への相対変位を制限し得る変位制限装置を設置した橋桁の変位制限構造において、
前記変位制限装置が請求項6記載の、分割体が障害板を備えた変位制限装置であり、
凸部材が橋桁と支持躯体の間の支持空間に設置され、橋桁と支持躯体のいずれか一方に固定されて、当該凸部材のストッパが前記支持空間内に突設され、
2以上の分割体が前記支持空間内に設置されて橋桁と支持躯体のいずれか他方に固定され、前記ストッパの外周が2以上の分割体の収容壁及び障害板で囲まれて、前記ストッパと前記分割体及び収容壁及び障害板との間に隙間が形成され、
前記2以上の分割体の障害板とストッパとが、橋桁と支持躯体との前記相対変位発生時に衝突してその相対変位が制限される構造である、
ことを特徴とする橋桁の変位制限構造。
It is possible to limit the horizontal displacement of the bridge girder and the support frame in the horizontal direction or the horizontal and vertical directions in the support space between the support frame such as the abutment and the pier and the bridge girder supported by the support. In the bridge girder displacement restriction structure with displacement restriction device installed,
The displacement limiting device according to claim 6, wherein the divided body is a displacement limiting device including an obstacle plate,
A convex member is installed in a support space between the bridge girder and the support housing, fixed to either the bridge girder or the support housing, and a stopper of the convex member is protruded into the support space,
Two or more divided bodies are installed in the support space and fixed to either the bridge girder or the support frame, and the outer periphery of the stopper is surrounded by the two or more divided body receiving walls and obstacle plates, A gap is formed between the divided body and the containing wall and the obstacle plate,
The obstacle plate and the stopper of the two or more divided bodies collide with each other when the relative displacement occurs between the bridge girder and the support frame, and the relative displacement is limited.
Displacement limiting structure of bridge girder characterized by that.
橋台や橋脚などの支持躯体と、その上に、支承により支持されて設置されている橋桁との間の支持空間に、橋桁と支持躯体との水平方向又は水平方向及び鉛直方向への相対変位を制限し得る変位制限装置を設置した橋桁の変位制限構造において、
前記変位制限装置が請求項7記載の、分割体とストッパとのいずれか一方が緩衝材を備えた変位制限装置であり、
凸部材が橋桁と支持躯体の間の支持空間内に設置され、橋桁と支持躯体のいずれか一方に固定されて当該凸部材のストッパが前記支持空間内に突設され、
2以上の分割体が前記支持空間内に設置されて橋桁と支持躯体のいずれか他方に固定され、前記ストッパの外周が前記2以上の分割体の収容壁で囲まれてストッパと分割体の収容凹部内面との間に隙間が形成され、
前記ストッパの緩衝材と2以上の分割体の収容凹部内面とが、又は2以上の分割体の緩衝材と前記ストッパの外周面とが、前記相対変位発生時に衝突することによってその相対変位が制限される構造である、
ことを特徴とする橋桁の変位制限構造。
The horizontal displacement of the bridge girder and the support frame in the horizontal direction or the horizontal and vertical directions is supported in the support space between the support frame such as the abutment and the pier and the bridge girder supported and installed on the support frame. In the bridge girder displacement restriction structure with a displacement restriction device that can be restricted,
The displacement limiting device according to claim 7, wherein any one of the divided body and the stopper is provided with a cushioning material,
The convex member is installed in the support space between the bridge girder and the support housing, and is fixed to either the bridge girder or the support housing, and the stopper of the convex member is protruded in the support space,
Two or more divided bodies are installed in the support space and fixed to one of the bridge girder and the support frame, and the stopper is surrounded by the two or more divided body receiving walls to accommodate the stopper and the divided body. A gap is formed between the inner surface of the recess,
The relative displacement is limited by the impact of the buffer material of the stopper and the inner surface of the receiving recess of the two or more divided bodies, or the buffer material of two or more divided bodies and the outer peripheral surface of the stopper when the relative displacement occurs Is the structure
Displacement limiting structure of bridge girder characterized by that.
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