JP6411970B2 - Method for dismantling and removing mobile work vehicle and mobile work vehicle - Google Patents

Method for dismantling and removing mobile work vehicle and mobile work vehicle Download PDF

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JP6411970B2
JP6411970B2 JP2015163915A JP2015163915A JP6411970B2 JP 6411970 B2 JP6411970 B2 JP 6411970B2 JP 2015163915 A JP2015163915 A JP 2015163915A JP 2015163915 A JP2015163915 A JP 2015163915A JP 6411970 B2 JP6411970 B2 JP 6411970B2
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bridge girder
mobile work
work vehicle
bridge
supported
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JP2017040139A (en
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利玄 小林
利玄 小林
大明 山中
大明 山中
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Kajima Corp
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本発明は、移動作業車の解体撤去方法及び移動作業車に関するものである。   The present invention relates to a method for dismantling and removing a mobile work vehicle and a mobile work vehicle.

従来、この分野の技術として、例えば下記特許文献1に記載の移動作業車(ワーゲン)の撤去方法が知られている。この移動作業車は斜張橋を建設に使用されるものであり、橋桁の完成後には、橋梁の橋脚の近傍まで後退し解体される。   Conventionally, as a technique in this field, for example, a method for removing a mobile work vehicle (wagen) described in Patent Document 1 below is known. This mobile work vehicle is used for the construction of a cable-stayed bridge. After the bridge girder is completed, it is retracted to the vicinity of the bridge pier and dismantled.

特開昭63−125712号公報JP 63-125712 A

橋桁の完成後には、移動作業車と橋脚との間の領域に、既に舗装やパラペットが施工済みであることも多い。このため、移動作業車を橋脚まで後退させるためには、移動作業車が舗装やパラペットを避けて後退する仕組みを構築する必要がある。例えば、特許文献1においては、橋桁の下方にある足場を橋桁の幅方向両端で支持する支持部を取り付け、支持部の車輪によって足場を支持して当該足場を橋脚近傍まで後退させる。しかしながら、このような移動作業車を後退させるための一連の作業は煩雑である。またスパンが大きい橋梁の場合には、移動作業車の移動自体にも時間がかかるので、工期短縮の観点からも移動作業車を橋脚近傍まで後退させる工程を省略することが望まれる。   After completion of the bridge girder, paving and parapets are often already constructed in the area between the mobile work vehicle and the pier. For this reason, in order to move the mobile work vehicle back to the pier, it is necessary to construct a mechanism in which the mobile work vehicle moves backward while avoiding paving and parapets. For example, in patent document 1, the support part which supports the scaffold under the bridge girder in the width direction both ends of a bridge girder is attached, a scaffold is supported by the wheel of a support part, and the said scaffold is retracted to the bridge pier vicinity. However, a series of operations for retracting such a mobile work vehicle is complicated. In the case of a bridge with a long span, it takes time to move the mobile work vehicle itself, and it is desirable to omit the step of moving the mobile work vehicle back to the vicinity of the bridge pier from the viewpoint of shortening the construction period.

本発明は、移動作業車の解体撤去時において、橋脚近傍までの後退工程を省略する移動作業車の解体撤去方法及び移動作業車を提供することを目的とする。   An object of the present invention is to provide a mobile work vehicle dismantling / removal method and a mobile work vehicle that eliminate the step of moving backward to the vicinity of the pier when the mobile work vehicle is dismantled.

本発明の移動作業車の解体撤去方法は、橋桁の張出し架設工法に用いられる移動作業車の解体撤去方法であって、移動作業車は、橋桁の上で橋軸方向に移動可能な移動台座部と、移動台座部から下方に延在し橋桁を間に挟んで両側に配置された一対の吊材と、橋桁の下方で橋軸直角方向に延在し一対の吊材によって吊下げ支持される横梁と、を有し移動台座部で支持される吊下構造体と、を備えており、吊下構造体を二分割し、分割された吊下構造体の各部分が独立して一つずつ移動台座部に吊下げ支持された状態とする構造体分割工程と、構造体分割工程の後、吊下構造体の各部分を移動台座部から撤去する撤去工程と、を備える。   The dismantling / removal method of the mobile work vehicle according to the present invention is a dismantling / removal method of the mobile work vehicle used for the bridge girder overhang construction method, and the mobile work vehicle is movable on the bridge girder in the direction of the bridge axis. And a pair of suspension members extending downward from the movable pedestal portion and disposed on both sides with the bridge girder interposed therebetween, and extending below the bridge girder in a direction perpendicular to the bridge axis and supported by the pair of suspension members. A suspension structure that is supported by the movable pedestal, and divides the suspension structure into two parts, and each of the divided suspension structures is independently one by one. And a structure dividing step for suspending and supporting the movable pedestal portion, and a removing step for removing each part of the suspended structure from the moving pedestal portion after the structure dividing step.

構造体分割工程では、横梁を延在方向に分割して2つの分割横梁とし、分割横梁が各々の吊材を介して一つずつ移動台座部に吊下げ支持された状態とするようにしてもよい。   In the structure dividing step, the transverse beam is divided in the extending direction to form two divided transverse beams, and the divided transverse beams are suspended and supported by the movable pedestal portion one by one through each suspension member. Good.

また、構造体分割工程では、横梁と一方の吊材との接続を解除し、横梁が他方の吊材を介して移動台座部に吊下げ支持された状態とするようにしてもよい。   Further, in the structure dividing step, the connection between the cross beam and one of the suspension members may be released, and the cross beam may be suspended and supported by the movable pedestal portion via the other suspension member.

また、本発明の移動作業車の解体撤去方法では、移動台座部は、橋軸直角方向に配列された複数のワーゲンフレームと、複数のワーゲンフレームに支持され橋軸直角方向に延在し、吊材が取り付けられる上梁と、を備え、撤去工程の後、上梁を延在方向に分割する上梁分割工程を更に備えるようにしてもよい。   In the dismantling / removal method for a mobile work vehicle according to the present invention, the mobile pedestal portion includes a plurality of wage frame arranged in a direction perpendicular to the bridge axis, and is supported by the plurality of wage frame and extends in a direction perpendicular to the bridge axis, and is suspended. An upper beam to which the material is attached, and after the removing step, an upper beam dividing step of dividing the upper beam in the extending direction may be further provided.

本発明の移動作業車は、橋桁の張出し架設工法に用いられる移動作業車であって、橋桁の上で橋軸方向に移動可能な移動台座部と、移動台座部から下方に延在し橋桁を間に挟んで両側に配置された一対の吊材と、橋桁の下方で橋軸直角方向に延在し一対の吊材によって吊下げ支持される横梁と、を有し移動台座部で支持される吊下構造体と、横梁を延在方向に分割可能とする分割機構と、吊材と横梁とを橋軸方向周りに相対回転可能にヒンジ結合するヒンジ部と、を備える。   The mobile work vehicle of the present invention is a mobile work vehicle used in a bridge girder overhang construction method, a movable pedestal portion movable in the bridge axis direction on the bridge girder, and a bridge girder extending downward from the movable pedestal portion. A pair of suspension members disposed on both sides of the bridge and a cross beam extending in a direction perpendicular to the bridge axis below the bridge girder and supported by the pair of suspension members and supported by the movable pedestal portion A suspension structure, a splitting mechanism that can split the horizontal beam in the extending direction, and a hinge portion that hinge-couples the hanging material and the horizontal beam so as to be relatively rotatable about the bridge axis direction.

また、本発明の移動作業車は、橋桁の張出し架設工法に用いられる移動作業車であって、橋桁の上で橋軸方向に移動可能な移動台座部と、移動台座部から下方に延在し橋桁を間に挟んで両側に配置された一対の吊材と、橋桁の下方で橋軸直角方向に延在し一対の吊材によって吊下げ支持される横梁と、を有し移動台座部で支持される吊下構造体と、一方の吊材と横梁とを橋軸方向周りに相対回転可能にヒンジ結合するヒンジ部と、他方の吊材と横梁との接続を解除可能な接続解除機構と、を備える。   Further, the mobile work vehicle of the present invention is a mobile work vehicle used in a bridge girder overhang construction method, and a movable pedestal portion movable in the bridge axis direction on the bridge girder, and extending downward from the movable pedestal portion. A pair of suspension members arranged on both sides with the bridge girder in between, and a horizontal beam extending in the direction perpendicular to the bridge axis below the bridge girder and supported by the pair of suspension members, and supported by the movable pedestal A suspension structure, a hinge portion that hinge-couples one suspension member and the transverse beam so as to be relatively rotatable around the bridge axis direction, and a connection release mechanism that can release the connection between the other suspension member and the transverse beam, Is provided.

本発明によれば、移動作業車の解体撤去時において、橋脚近傍までの後退工程を省略する移動作業車の解体撤去方法及び移動作業車を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the dismantling removal method of a mobile work vehicle and a mobile work vehicle which abbreviate | omit the reverse process to the pier vicinity at the time of the dismantling removal of a mobile work vehicle can be provided.

第1実施形態の解体撤去方法が適用される移動作業車と橋梁とを示す側面図である。It is a side view which shows the mobile work vehicle and bridge to which the dismantling removal method of 1st Embodiment is applied. 移動作業車と橋桁とを示す正面図である。It is a front view which shows a mobile work vehicle and a bridge girder. 完成した橋桁と移動作業車とを示す側面図である。It is a side view which shows the completed bridge girder and a mobile work vehicle. (a)はヒンジ部近傍を示す側面図,(b)はその正面図である。(A) is the side view which shows the hinge part vicinity, (b) is the front view. (a),(b)は、連結分割機構を示す図である。(A), (b) is a figure which shows a connection division | segmentation mechanism. (a),(b)は、解体撤去方法の手順を示す図である。(A), (b) is a figure which shows the procedure of the demolition removal method. (a),(b)は、図5に続く手順を示す図である。(A), (b) is a figure which shows the procedure following FIG. 第2実施形態における解体撤去方法を示す図である。It is a figure which shows the demolition removal method in 2nd Embodiment.

以下、本発明に係る実施の形態について図面を参照しながら具体的に説明する。便宜上、実質的に同一の要素には同一の符号を付し、その説明を省略する場合がある。   Embodiments according to the present invention will be specifically described below with reference to the drawings. For convenience, the same reference numerals are given to substantially the same elements, and the description thereof may be omitted.

(第1実施形態)
図1は、橋梁100及び移動作業車1を示す側面図であり、図2は、その正面図である。移動作業車1は、橋梁100における橋桁102の張出し架設工法に用いられる。以下、図に示されるように橋梁100の橋軸直角方向にX軸、橋軸方向にY軸、鉛直方向にZ軸を取ったXYZ直交座標系を設定し、各部の位置関係等の説明にX,Y,Zを用いる場合がある。移動作業車1は、張出施工が予定される予定施工位置P側を張出方向として、橋桁102の既設部分から外方に張り出している。移動作業車1は、橋桁102の上面において橋軸方向に移動可能な移動台座部3と、移動台座部3により吊下げられ支持される吊下構造体5とを備えている。
(First embodiment)
FIG. 1 is a side view showing the bridge 100 and the mobile work vehicle 1, and FIG. 2 is a front view thereof. The mobile work vehicle 1 is used in a method for extending a bridge girder 102 in a bridge 100. As shown in the figure, an XYZ orthogonal coordinate system is set with the X axis in the direction perpendicular to the bridge axis of the bridge 100, the Y axis in the bridge axis direction, and the Z axis in the vertical direction. X, Y, Z may be used. The mobile work vehicle 1 projects outward from the existing part of the bridge girder 102 with the planned construction position P side where the overhang construction is scheduled as the overhang direction. The mobile work vehicle 1 includes a movable pedestal 3 that can move in the bridge axis direction on the upper surface of the bridge girder 102, and a suspended structure 5 that is suspended and supported by the movable pedestal 3.

橋桁102の上面にはY方向に延在するレール103が敷設されており、移動台座部3はレール103上をY方向に移動可能である。移動台座部3は、X方向に配列された左右一対のワーゲンフレーム7と、ワーゲンフレーム7に架け渡されX方向に延びる2本の上梁9とを備えている。ワーゲンフレーム7は、側面視において略平行四辺形状をなしており当該平行四辺形の鈍角を構成する一方の頂点と他方の頂点とを連結する支柱が設けられている。2本の上梁9は、ワーゲンフレーム7上でX方向に延在すると共にY方向に配列されている。2本の上梁9のうち、後方の上梁9が橋桁102の既設の部分の鉛直上方に位置し、前方の上梁9が予定施工位置Pの鉛直上方に位置するように、移動台座部3が配置される。   A rail 103 extending in the Y direction is laid on the upper surface of the bridge girder 102, and the movable pedestal 3 can move on the rail 103 in the Y direction. The movable pedestal 3 includes a pair of left and right wage frames 7 arranged in the X direction, and two upper beams 9 that extend across the wage frame 7 and extend in the X direction. The wagen frame 7 has a substantially parallelogram shape in a side view, and is provided with a column that connects one apex constituting the obtuse angle of the parallelogram and the other apex. The two upper beams 9 extend in the X direction on the wage frame 7 and are arranged in the Y direction. Of the two upper beams 9, the movable pedestal portion is such that the rear upper beam 9 is positioned vertically above the existing portion of the bridge girder 102 and the front upper beam 9 is positioned vertically above the planned construction position P. 3 is arranged.

吊下構造体5は、前後2本の上梁9の一つずつに設けられている。図2に示されるように、吊下構造体5は、上梁9の両端部から下方に延在し橋桁102を間に挟んで両側に配置された一対の吊材13a,13bと、橋桁102の下方でX方向に延在し一対の吊材13a,13bによって両持ちで吊下げ支持される横梁15と、を有している。吊材13a,13bとしては、例えば、ゲビンデを採用することができる。吊材13a,13bは、センターホールジャッキ18を介して上梁9に支持されており、センターホールジャッキ18の駆動により上梁9に対して上下移動する。また、2本の横梁15上に架け渡すように、Y方向に延在する複数の縦梁17がX方向に複数配列されている。このような2本の横梁15と複数の縦梁17とによって、橋桁102の下方に作業足場19が構築されている。また、作業足場19と橋桁102との間には、吊材13a,13bに支持された型枠受梁21が配置されている。   The suspended structure 5 is provided in each of the two upper beams 9 in the front and rear. As shown in FIG. 2, the suspension structure 5 includes a pair of suspension members 13 a and 13 b that extend downward from both ends of the upper beam 9 and are arranged on both sides with the bridge girder 102 interposed therebetween, and a bridge girder 102. And a transverse beam 15 that extends in the X direction below and is supported by being suspended by a pair of suspension members 13a and 13b. As the suspension members 13a and 13b, for example, Gebinde can be adopted. The suspension members 13 a and 13 b are supported by the upper beam 9 via the center hole jack 18, and move up and down with respect to the upper beam 9 by driving the center hole jack 18. A plurality of vertical beams 17 extending in the Y direction are arranged in the X direction so as to be bridged on the two horizontal beams 15. The work scaffold 19 is constructed below the bridge girder 102 by the two horizontal beams 15 and the plurality of vertical beams 17. Further, between the work scaffold 19 and the bridge girder 102, a frame receiving beam 21 supported by the suspension members 13a and 13b is disposed.

このような移動作業車1では、橋脚101上の柱頭部104の端部から張出方向に向かって張出施工が行われる。本実施形態では、柱頭部104に配置された2台の移動作業車1によって、互いに反対方向に向かって段階的に張出施工が行われる。すなわち、予め計画された張出スパン長毎にブロック単位で複数回の施工が行われることによって、橋桁102が張出方向に伸長される。   In such a mobile work vehicle 1, overhanging work is performed from the end of the column head 104 on the pier 101 toward the overhanging direction. In the present embodiment, the overhanging work is performed in stages in the opposite directions by the two mobile work vehicles 1 arranged on the column head 104. That is, the bridge girder 102 is extended in the overhang direction by performing a plurality of constructions in units of blocks for each overhang span length planned in advance.

図1に示されるように、張出施工では、柱頭部104に移動作業車1が固定されている状態で、型枠受梁21に型枠が配置される。このとき型枠は、予め計画された張出スパン長に対応した予定施工位置Pに配置される。続いて、鉄筋及びPC(Prestressed Concrete)鋼材の組立が行われ、コンクリートが打設される。コンクリートの養生期間が終了するとPC鋼材の緊張がなされ、型枠が解体される。これにより、施工計画における一回目の施工サイクルが終了し、所定スパン長だけ橋桁102が伸長される。次の施工サイクルでは、まず、伸長された橋桁102上にレール103が延長される。移動作業車1は、延長されたレール103上を移動し、伸長された橋桁102の端部に固定される。そして、施工計画に基づいて施工サイクルが繰り返されることによって、計画された張出スパン長に応じて段階的に橋桁102が伸長される。   As shown in FIG. 1, in the overhang construction, the formwork is arranged on the formwork receiving beam 21 in a state where the mobile work vehicle 1 is fixed to the column head 104. At this time, the formwork is arranged at the planned construction position P corresponding to the overhang span length planned in advance. Subsequently, rebar and PC (Prestressed Concrete) steel materials are assembled and concrete is placed. When the concrete curing period ends, the PC steel is tensioned and the formwork is dismantled. Thereby, the first construction cycle in the construction plan is completed, and the bridge girder 102 is extended by a predetermined span length. In the next construction cycle, the rail 103 is first extended on the extended bridge girder 102. The mobile work vehicle 1 moves on the extended rail 103 and is fixed to the end of the extended bridge girder 102. Then, by repeating the construction cycle based on the construction plan, the bridge girder 102 is extended stepwise in accordance with the planned overhang span length.

図3に示されるように、同様の張出施工が、橋脚101に隣接する橋脚101Bからも行われている。そして、橋脚101,101B間で張り出し部分同士が接合されることによって、橋脚101,101B間の橋桁102が完成する。   As shown in FIG. 3, a similar overhang construction is also performed from the pier 101B adjacent to the pier 101. And the overhang | projection part is joined between the bridge piers 101 and 101B, and the bridge girder 102 between the bridge piers 101 and 101B is completed.

続いて、橋脚101,101B間の橋桁102が完成した後に、移動作業車1を解体撤去する方法の第1実施形態について説明する。   Next, a first embodiment of a method for dismantling and removing the mobile work vehicle 1 after the bridge girder 102 between the piers 101 and 101B is completed will be described.

本実施形態の解体撤去方法を実行可能にするために、移動作業車1は、以下の構成を備えている。すなわち、吊材13a,13bと横梁15とはヒンジ部23においてヒンジ結合されている。ヒンジ部23においては、吊材13a,13bと横梁15とがY方向に平行な軸線周りに相対回転可能な状態で結合されている。また、移動作業車1においては、横梁15は、X方向に着脱可能に連結された同じ長さの2本の分割横梁15a,15bで構成されている。そして、分割横梁15aと分割横梁15bとは、連結分割機構27を介して連結されている。横梁15は、2本の吊材13a,13bで吊下げ支持された状態から、橋桁102の幅方向中央の位置でX方向に二分割可能である。また、上梁9は、X方向に着脱可能に連結された同じ長さの2本の分割上梁9a,9bで構成されており、橋桁102の幅方向中央の位置でX方向に二分割可能である。そして、分割上梁9aと分割上梁9bとは、連結分割機構29を介して連結されている。   In order to enable the dismantling / removal method of the present embodiment, the mobile work vehicle 1 has the following configuration. That is, the suspension members 13 a and 13 b and the cross beam 15 are hinge-coupled at the hinge portion 23. In the hinge part 23, the suspension members 13a and 13b and the cross beam 15 are coupled in a state in which they can rotate relative to each other around an axis parallel to the Y direction. In the mobile work vehicle 1, the cross beam 15 is composed of two split cross beams 15a and 15b having the same length and detachably connected in the X direction. The divided transverse beams 15 a and the divided transverse beams 15 b are connected via a connecting and dividing mechanism 27. The horizontal beam 15 can be divided into two in the X direction at the center in the width direction of the bridge girder 102 from a state in which the cross beam 15 is suspended and supported by the two suspension members 13a and 13b. Further, the upper beam 9 is composed of two divided upper beams 9a and 9b having the same length that are detachably connected in the X direction, and can be divided into two in the X direction at the center of the bridge beam 102 in the width direction. It is. The divided upper beam 9 a and the divided upper beam 9 b are connected via a connecting and dividing mechanism 29.

ここで、ヒンジ部23の一例を説明する。例えば、図4(a),(b)に示されるように、横梁15が2本の平行するH鋼15sで構成される場合、ヒンジ部23においては、H鋼15s同士の間に吊材13bの先端の接続部13jが挟み込まれる。接続部13jとH鋼16aのウエブには、Y方向に貫通するピン孔がそれぞれ設けられており、これらのピン孔にY方向に挿通される1本の接続ピン14によって、横梁15と吊材13bとが互いに接続され、横梁15と吊材13bとが接続ピン14を軸として互いに回転可能とされている。   Here, an example of the hinge part 23 will be described. For example, as shown in FIGS. 4A and 4B, when the cross beam 15 is composed of two parallel H steels 15s, in the hinge portion 23, the suspension member 13b is interposed between the H steels 15s. The connecting portion 13j at the tip of the is sandwiched. The connecting portion 13j and the web of the H steel 16a are provided with pin holes penetrating in the Y direction, respectively, and the horizontal beam 15 and the suspension member are formed by one connecting pin 14 inserted through these pin holes in the Y direction. 13b is connected to each other, and the cross beam 15 and the suspension member 13b are rotatable about the connection pin 14 as an axis.

また、連結分割機構27の一例を説明する。図5(a),(b)に示されるように、連結分割機構27は、分割横梁15aの下面に設けられた連結部27aと、分割横梁15bの下面に設けられた連結部7bと、を有している。連結部27a,27bにはそれぞれピン孔27hが設けられている。連結部27a,27bがY方向に重ねられ、両方のピン孔27hに連結ピン27pがY方向に挿通されることにより、連結部27aと連結部27bとが連結され、分割横梁15aと分割横梁15bとが連結される。また、連結ピン27pをY方向に引抜くことにより、分割横梁15aと分割横梁15bとが分離される。上記のような連結ピン27pの挿抜は、例えば油圧ジャッキ等で連結ピン27pをY方向に駆動して行ってもよい。なお、連結分割機構29は、例えば、上述の連結分割機構27と同様の構造を成してもよい。   An example of the connecting / dividing mechanism 27 will be described. As shown in FIGS. 5A and 5B, the connecting and dividing mechanism 27 includes a connecting portion 27a provided on the lower surface of the divided transverse beam 15a and a connecting portion 7b provided on the lower surface of the divided transverse beam 15b. Have. Each of the connecting portions 27a and 27b is provided with a pin hole 27h. The connecting portions 27a and 27b are overlapped in the Y direction, and the connecting pin 27p is inserted in both the pin holes 27h in the Y direction, whereby the connecting portion 27a and the connecting portion 27b are connected to each other, and the divided transverse beam 15a and the divided transverse beam 15b are connected. And are connected. Further, the split horizontal beam 15a and the split horizontal beam 15b are separated by pulling out the connecting pin 27p in the Y direction. The insertion and removal of the connecting pin 27p as described above may be performed by driving the connecting pin 27p in the Y direction with, for example, a hydraulic jack. In addition, the connection division | segmentation mechanism 29 may comprise the structure similar to the above-mentioned connection division | segmentation mechanism 27, for example.

本実施形態の解体撤去方法では、橋脚101,101B間の橋桁102が完成した後、図6(a)に示されるように、型枠受梁21と縦梁17とが撤去される。次に、橋桁102上にウインチ41が設置され、上梁9の端部と分割横梁15aと分割横梁bとにそれぞれ滑車43a,43b,43cが設置される。ウインチ41から延びるワイヤ45が滑車43a,43b,43cに架けられ、ワイヤ45の先端45aが分割横梁15aに固定される。次に、連結分割機構27の連結ピン27pが除去されることで、横梁15がX方向に二分割され分割横梁15a,15bとなる。この状態から、ワイヤ45がウインチ41から送り出されると、図6(b)に示されるように、分割横梁15a,15bは、自重によってそれぞれヒンジ部23を中心として回転する。そして最終的には、分割横梁15a,15bが各々の吊材13a,13bを介して一つずつ移動台座部3の上梁9に吊下げ支持された状態となる(構造体分割工程)。このとき、ウインチ41からのワイヤ45の送り出し速度を調整することにより、分割横梁15a,15bの急激な回転が避けられ、分割横梁15a,15bの搖動が抑えられる。   In the dismantling and removal method of the present embodiment, after the bridge girder 102 between the piers 101 and 101B is completed, the form receiving beam 21 and the vertical beam 17 are removed as shown in FIG. Next, the winch 41 is installed on the bridge girder 102, and the pulleys 43a, 43b, and 43c are installed at the end of the upper beam 9, the divided horizontal beam 15a, and the divided horizontal beam b, respectively. A wire 45 extending from the winch 41 is hung on the pulleys 43a, 43b, and 43c, and a tip 45a of the wire 45 is fixed to the split transverse beam 15a. Next, by removing the connecting pin 27p of the connecting and splitting mechanism 27, the cross beam 15 is divided into two in the X direction to form split horizontal beams 15a and 15b. From this state, when the wire 45 is fed out from the winch 41, as shown in FIG. 6B, the divided horizontal beams 15a and 15b rotate around the hinge portion 23 by their own weight. Finally, the divided transverse beams 15a and 15b are suspended and supported by the upper beam 9 of the movable pedestal 3 one by one through the respective suspension members 13a and 13b (structure dividing step). At this time, by adjusting the feeding speed of the wire 45 from the winch 41, rapid rotation of the divided transverse beams 15a and 15b can be avoided, and peristalsis of the divided transverse beams 15a and 15b can be suppressed.

続いて、図7(a)に示されるように、橋桁102上に設置されたクレーン47により、一方の吊材13a及び分割横梁15aが一体として吊り上げられ、上梁9から取り外される。取り外された吊材13aと分割横梁15aは、橋桁102上で分解され搬出される。なお、クレーン47に代えて、例えばヘリコプターで吊材13a及び分割横梁15aが吊り上げられ上梁9から取り外されてもよい。同様にして、他方の吊材13b及び分割横梁15bが撤去される(撤去工程)。   Subsequently, as shown in FIG. 7A, the one suspension member 13 a and the divided transverse beam 15 a are lifted together by the crane 47 installed on the bridge girder 102 and removed from the upper beam 9. The removed suspension member 13a and the divided cross beam 15a are disassembled on the bridge girder 102 and carried out. Instead of the crane 47, the suspension member 13a and the divided cross beam 15a may be lifted and removed from the upper beam 9 by a helicopter, for example. Similarly, the other suspension member 13b and the divided cross beam 15b are removed (removal step).

続いて、図7(b)に示されるように、連結分割機構29が操作され、上梁9が分割上梁9aと分割上梁9bとに二分割される(上梁分割工程)。そして、分割上梁9a及び一方のワーゲンフレーム7が一体としてクレーン47で吊り上げられ、橋桁102上で分解され搬出される。このとき、分割上梁9b側は、仮ステー49により一時的に支持されてもよい。同様にして、分割上梁9a及び他方のワーゲンフレーム7が撤去される。   Subsequently, as shown in FIG. 7B, the connecting / dividing mechanism 29 is operated to divide the upper beam 9 into two parts, the divided upper beam 9a and the divided upper beam 9b (upper beam dividing step). Then, the split upper beam 9a and one of the wage frame 7 are lifted together by the crane 47, disassembled on the bridge girder 102, and carried out. At this time, the divided upper beam 9 b side may be temporarily supported by the temporary stay 49. Similarly, the divided upper beam 9a and the other wage frame 7 are removed.

上述の解体撤去方法による作用効果について説明する。この解体撤去方法では、一対の吊材13a,13bと横梁15とで構成される吊下構造体5が二分割される。そして、吊材13a及び分割横梁15aと、吊材13b及び分割横梁15bと、が独立して一つずつ移動台座部3に吊下げ支持された状態となり(構造体分割工程)、その後、各々吊下げ支持された吊下構造体5の各部分が移動台座部3から撤去される(撤去工程)。このような解体撤去方法によれば、橋桁102の下で二分割された吊下構造体5をそれぞれ別々に撤去することにより、橋脚101と橋脚101Bとの中央の位置においても、移動作業車1の解体撤去を実行することができる。よって、移動作業車1を橋脚101の近傍まで後退させる工程を省略することができ、工期の短縮を図ることができる。   The effect by the above-mentioned dismantling removal method is demonstrated. In this dismantling and removal method, the suspended structure 5 composed of the pair of suspension members 13a and 13b and the cross beam 15 is divided into two. Then, the suspension member 13a and the divided transverse beam 15a, and the suspension member 13b and the divided transverse beam 15b are individually suspended and supported by the movable pedestal portion 3 one by one (structure dividing step), and then suspended. Each part of the suspended structure 5 supported by being lowered is removed from the movable pedestal 3 (removal step). According to such a dismantling / removing method, the suspended work body 1 divided under the bridge girder 102 is separately removed, so that the mobile work vehicle 1 can be installed even at the center of the pier 101 and the pier 101B. Can be dismantled. Therefore, the process of retracting the mobile work vehicle 1 to the vicinity of the pier 101 can be omitted, and the construction period can be shortened.

また、上述の解体撤去方法における構造体分割工程は、横梁15を延在方向に分割して2つの分割横梁15a,15bとし、分割横梁15a,15bが各々の吊材13a,13bを介して一つずつ移動台座部3に吊下げ支持された状態とする方式で実行される。従って、移動台座部3の両側に吊下げ支持される重量のバランスが良い。   Further, the structure dividing step in the dismantling and removing method described above divides the transverse beam 15 in the extending direction into two divided transverse beams 15a and 15b, and the divided transverse beams 15a and 15b are connected to each other via the suspension members 13a and 13b. It is executed in such a manner that the mobile base 3 is suspended and supported one by one. Therefore, the weight balance supported by suspension on both sides of the movable pedestal 3 is good.

(第2実施形態)
続いて、第2実施形態に係る移動作業車1Aの解体撤去方法について説明する。だだし、本実施形態において、前述の第1実施形態と同一又は同等な構成部分には同一符号を付し重複する説明を省略する。
(Second Embodiment)
Next, a method for dismantling and removing the mobile work vehicle 1A according to the second embodiment will be described. However, in the present embodiment, the same reference numerals are given to the same or equivalent components as those in the first embodiment described above, and redundant description will be omitted.

本実施形態の解体撤去方法を可能にするために、図8に示される移動作業車1Aは、以下の構成を備えている。すなわち、移動作業車1Aの横梁16は、前述の横梁15とは異なり、二分割不可能であってもよい。また、横梁16は、接続解除可能な接続解除機構24を介して吊材13bと接続されており、吊材13aとはヒンジ部23を介して接続されている。ここで、接続解除機構24の一例を説明する。接続解除機構24は、例えば、ヒンジ部23と同様の構造(図4参照)を有している。そして、ヒンジ部23における接続ピン14を、油圧ジャッキ等を用いてY方向に引抜くことにより、横梁16と吊材13bとの接続を解除することができる。   In order to enable the disassembly and removal method of the present embodiment, the mobile work vehicle 1A shown in FIG. 8 has the following configuration. That is, the cross beam 16 of the mobile work vehicle 1A may not be divided into two, unlike the cross beam 15 described above. The cross beam 16 is connected to the suspension member 13b via a connection release mechanism 24 that can be disconnected, and is connected to the suspension member 13a via a hinge portion 23. Here, an example of the connection release mechanism 24 will be described. The connection release mechanism 24 has, for example, the same structure as that of the hinge part 23 (see FIG. 4). And the connection of the cross beam 16 and the suspension member 13b can be cancelled | released by pulling out the connection pin 14 in the hinge part 23 to a Y direction using a hydraulic jack etc. FIG.

本実施形態の解体撤去方法における構造体分割工程について説明する。構造体分割工程では、橋桁102上のウインチ41と、上梁9の端部の滑車43aが設置され、ウインチ41から延びるワイヤ45が滑車43aを介して横梁16の端部に接続される。続いて、接続解除機構24が操作され、吊材13bと横梁16との接続が解除される。この状態から、ワイヤ45がウインチ41から送り出されると、図7に示されるように、横梁16は、自重によってヒンジ部23を中心として回転する。そして最終的には、横梁16が吊材13aを介して移動台座部3の上梁9に吊下げ支持された状態となる。一方、吊材13bは、上梁9の他端側から吊下げ支持された状態となる。なお、本実施形態の解体撤去方法における構造体分割工程以外の工程は、第1実施形態と同様であるので、重複する説明を省略する。   The structure division | segmentation process in the dismantling removal method of this embodiment is demonstrated. In the structure dividing step, the winch 41 on the bridge girder 102 and the pulley 43a at the end of the upper beam 9 are installed, and the wire 45 extending from the winch 41 is connected to the end of the cross beam 16 through the pulley 43a. Subsequently, the connection release mechanism 24 is operated, and the connection between the suspension member 13b and the cross beam 16 is released. From this state, when the wire 45 is fed out from the winch 41, as shown in FIG. 7, the horizontal beam 16 rotates around the hinge portion 23 by its own weight. Finally, the horizontal beam 16 is suspended and supported by the upper beam 9 of the movable pedestal portion 3 via the suspension member 13a. On the other hand, the suspension member 13 b is suspended and supported from the other end side of the upper beam 9. In addition, since processes other than the structure division | segmentation process in the dismantling removal method of this embodiment are the same as that of 1st Embodiment, the overlapping description is abbreviate | omitted.

上述の解体撤去方法による作用効果について説明する。この解体撤去方法では、吊下構造体5が一方の吊材13a及び横梁16と、他方の吊材13bと、に二分割される。そして、一方の吊材13a及び横梁16と、他方の吊材13bと、が独立して一つずつ移動台座部3に吊下げ支持された状態となり(構造体分割工程)、その後、各々吊下げ支持された吊下構造体5の各部分が移動台座部3から撤去される(撤去工程)。このような解体撤去方法によっても、第1実施形態と同様に、移動作業車1Aを橋脚101の近傍まで後退させる工程を省略することができ、工期の短縮を図ることができる。   The effect by the above-mentioned dismantling removal method is demonstrated. In this dismantling / removal method, the suspended structure 5 is divided into one suspended member 13a and a cross beam 16 and the other suspended member 13b. Then, the one suspension member 13a and the cross beam 16 and the other suspension member 13b are independently suspended and supported by the movable pedestal 3 one by one (structure dividing step), and then suspended. Each part of the supported suspended structure 5 is removed from the movable base part 3 (removal process). Also by such a dismantling removal method, the process of retracting the mobile work vehicle 1A to the vicinity of the pier 101 can be omitted as in the first embodiment, and the construction period can be shortened.

本発明は、上述した実施形態を始めとして、当業者の知識に基づいて種々の変更、改良を施した様々な形態で実施することができる。また、上述した実施形態に記載されている技術的事項を利用して変形例を構成することも可能である。各実施形態の構成を適宜組み合わせて使用してもよい。   The present invention can be implemented in various forms including various modifications and improvements based on the knowledge of those skilled in the art including the above-described embodiments. Moreover, it is also possible to configure a modified example using the technical matters described in the above-described embodiment. You may use combining the structure of each embodiment suitably.

1…移動作業車、3…移動台座部、5…吊下構造体、7…ワーゲンフレーム、9…上梁、13a,13b…吊材、15…横梁、15a,15b…分割横梁、23…ヒンジ部、24…接続解除機構、27…連結分割機構(分割機構)、102…橋桁。   DESCRIPTION OF SYMBOLS 1 ... Mobile work vehicle, 3 ... Moving base part, 5 ... Suspension structure, 7 ... Wagen frame, 9 ... Upper beam, 13a, 13b ... Suspension material, 15 ... Cross beam, 15a, 15b ... Divided cross beam, 23 ... Hinge , 24 ... Connection release mechanism, 27 ... Connection and division mechanism (split mechanism), 102 ... Bridge girder

Claims (6)

橋桁の張出し架設工法に用いられる移動作業車の解体撤去方法であって、
前記移動作業車は、
前記橋桁の上で橋軸方向に移動可能な移動台座部と、
前記移動台座部から下方に延在し前記橋桁を間に挟んで両側に配置された一対の吊材と、前記橋桁の下方で橋軸直角方向に延在し前記一対の吊材によって吊下げ支持される横梁と、を有し前記移動台座部で支持される吊下構造体と、を備えており、
前記吊下構造体を二分割し、分割された前記吊下構造体の各部分が独立して一つずつ前記移動台座部に吊下げ支持された状態とする構造体分割工程と、
前記構造体分割工程の後、前記吊下構造体の各部分を前記移動台座部から撤去し、前記橋桁上で前記各部分を分解し搬出する撤去工程と、を備える、移動作業車の解体撤去方法。
A method of dismantling and removing a mobile work vehicle used for the bridge girder overhang construction method,
The mobile work vehicle is
A movable pedestal that is movable in the direction of the bridge axis on the bridge girder;
A pair of suspension members extending downward from the movable pedestal portion and disposed on both sides with the bridge girder in between, and a suspension support supported by the pair of suspension members extending in a direction perpendicular to the bridge axis below the bridge girder And a suspended structure that is supported by the movable pedestal portion,
A structure dividing step in which the suspended structure is divided into two, and each part of the divided suspended structure is suspended and supported by the movable pedestal portion one by one;
After the structure dividing step, each part of the suspended structure is removed from the moving pedestal part, and a removing step of disassembling and carrying out the parts on the bridge girder is provided. Method.
前記構造体分割工程では、
前記横梁を延在方向に分割して2つの分割横梁とし、前記分割横梁が各々の前記吊材を介して一つずつ前記移動台座部に吊下げ支持された状態とする、請求項1に記載の移動作業車の解体撤去方法。
In the structure dividing step,
The said horizontal beam is divided | segmented into the extending direction, it is set as two division | segmentation horizontal beams, The said horizontal beam is made into the state suspended and supported by the said movement base part one by one via each said suspension material. How to dismantle and remove mobile work vehicles.
橋桁の張出し架設工法に用いられる移動作業車の解体撤去方法であって、
前記移動作業車は、
前記橋桁の上で橋軸方向に移動可能な移動台座部と、
前記移動台座部から下方に延在し前記橋桁を間に挟んで両側に配置された一対の吊材と、前記橋桁の下方で橋軸直角方向に延在し前記一対の吊材によって吊下げ支持される横梁と、を有し前記移動台座部で支持される吊下構造体と、を備えており、
前記吊下構造体を二分割し、分割された前記吊下構造体の各部分が独立して一つずつ前記移動台座部に吊下げ支持された状態とする構造体分割工程と、
前記構造体分割工程の後、前記吊下構造体の各部分を前記移動台座部から撤去する撤去工程と、を備え、
前記構造体分割工程では、
前記横梁と一方の前記吊材との接続を解除し、前記横梁が他方の前記吊材を介して前記移動台座部に吊下げ支持された状態とする、移動作業車の解体撤去方法。
A method of dismantling and removing a mobile work vehicle used for the bridge girder overhang construction method,
The mobile work vehicle is
A movable pedestal that is movable in the direction of the bridge axis on the bridge girder;
A pair of suspension members extending downward from the movable pedestal portion and disposed on both sides with the bridge girder in between, and a suspension support supported by the pair of suspension members extending in a direction perpendicular to the bridge axis below the bridge girder And a suspended structure that is supported by the movable pedestal portion,
A structure dividing step in which the suspended structure is divided into two, and each part of the divided suspended structure is suspended and supported by the movable pedestal portion one by one;
A removal step of removing each part of the suspended structure from the movable pedestal after the structure dividing step;
In the structure dividing step,
Said cross beam and releases the connection between one of said hanging member, said transverse beams shall be the state of being suspended on the moving base portion via the other of the suspended material support, dismantling method of transfer operations industry vehicles.
前記移動台座部は、前記橋軸直角方向に配列された複数のワーゲンフレームと、
前記複数のワーゲンフレームに支持され前記橋軸直角方向に延在し、前記吊材が取り付けられる上梁と、を備え、
前記撤去工程の後、前記上梁を延在方向に分割する上梁分割工程を更に備える、請求項1〜3の何れか1項に記載の移動作業車の解体撤去方法。
The moving pedestal portion includes a plurality of wage frame arranged in a direction perpendicular to the bridge axis,
An upper beam supported by the plurality of wage frame and extending in a direction perpendicular to the bridge axis, to which the suspension member is attached,
The dismantling removal method of the mobile work vehicle according to any one of claims 1 to 3, further comprising an upper beam dividing step of dividing the upper beam in an extending direction after the removing step.
橋桁の張出し架設工法に用いられる移動作業車であって、
前記橋桁の上で橋軸方向に移動可能な移動台座部と、
前記移動台座部から下方に延在し前記橋桁を間に挟んで両側に配置された一対の吊材と、前記橋桁の下方で橋軸直角方向に延在し前記一対の吊材によって吊下げ支持される横梁と、を有し前記移動台座部で支持される吊下構造体と、
前記横梁を延在方向に分割可能とし、前記横梁が分割されてなる各々の分割横梁に設けられたピン孔と、各前記ピン孔の両方に挿抜される連結ピンと、前記ピン孔への挿抜方向に前記連結ピンを駆動する駆動部と、を有する分割機構と、
前記吊材と前記横梁とを橋軸方向周りに相対回転可能にヒンジ結合するヒンジ部と、を備える、移動作業車。
It is a mobile work vehicle used for the bridge girder overhang construction method,
A movable pedestal that is movable in the direction of the bridge axis on the bridge girder;
A pair of suspension members extending downward from the movable pedestal portion and disposed on both sides with the bridge girder in between, and a suspension support supported by the pair of suspension members extending in a direction perpendicular to the bridge axis below the bridge girder A suspended structure that is supported by the movable pedestal portion,
The transverse beam can be divided in the extending direction, pin holes provided in each of the divided transverse beams obtained by dividing the transverse beam, connecting pins inserted into and extracted from both the pin holes, and insertion / extraction into the pin holes a dividing mechanism for chromatic and a driving unit for driving the connecting pin in a direction, and
A mobile work vehicle comprising: a hinge portion that hinges the suspension member and the cross beam so as to be relatively rotatable about a bridge axis direction.
橋桁の張出し架設工法に用いられる移動作業車であって、
前記橋桁の上で橋軸方向に移動可能な移動台座部と、
前記移動台座部から下方に延在し前記橋桁を間に挟んで両側に配置された一対の吊材と、前記橋桁の下方で橋軸直角方向に延在し前記一対の吊材によって吊下げ支持される横梁と、を有し前記移動台座部で支持される吊下構造体と、
一方の前記吊材と前記横梁とを橋軸方向周りに相対回転可能にヒンジ結合するヒンジ部と、
他方の前記吊材と前記横梁との接続を解除可能な接続解除機構と、を備える、移動作業車。
It is a mobile work vehicle used for the bridge girder overhang construction method,
A movable pedestal that is movable in the direction of the bridge axis on the bridge girder;
A pair of suspension members extending downward from the movable pedestal portion and disposed on both sides with the bridge girder in between, and a suspension support supported by the pair of suspension members extending in a direction perpendicular to the bridge axis below the bridge girder A suspended structure that is supported by the movable pedestal portion,
A hinge portion that hinge-couples the one suspension member and the cross beam so as to be relatively rotatable around a bridge axis direction;
A mobile work vehicle comprising: a connection release mechanism capable of releasing connection between the other suspension member and the cross beam.
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