JP2007146443A - Method for constructing and removing bridge, and apparatus for constructing bridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of constructing and removing a bridge capable of recovering the site in a short period by reducing working time at the site and an apparatus for constructing the bridge used for the method. <P>SOLUTION: The construction of a bridge G is performed by using the apparatus 1 for constructing the bridge. First, vertical beam members 10 formed integrally with the bridge G to be installed are carried into a side space S in an installation district C. Lateral beam members are installed across the installation district C. The bridge G suspended from the vertical beam members 10 is installed on a pedestal A by laterally moving it over the installation district C. Then, the vertical beam members 10 are returned from over the installation district C to the side space S. The vertical beam members 10 are removed from the side space S together with the lateral beam members 30. The removal construction is performed basically by following the reverse steps of the installation construction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a bridge girder construction and removal method and a bridge girder construction apparatus.

As a kind of erection method to install the bridge girder transported from the factory on site, carry the bridge girder into the side space provided on the side of the construction section where the bridge girder is erected, and send this bridge girder laterally to the predetermined position. There is a construction method of laying them together (for example, Patent Document 1). In this method, a horizontal beam is passed from the side space to the construction section, the bridge girder carried to the side space is attached to the end of the side space on the side beam, and then the bridge girder is installed along the side beam to the construction section side. It is a method of sending and installing at a predetermined position.
Also, as a type of construction method to remove the existing bridge girder, a cross beam is transferred from the removal section where the bridge girder is removed to the side space, and the existing bridge girder is laterally fed along the side beam to the side space for removal. There is.
JP-A-9-59930

  However, in the construction method as described above, it is necessary to bridge the cross beam in advance before the bridge girder installation and removal work, and it is necessary to remove the cross beam after the bridge girder installation and removal work is completed. is there. In order to cross the cross beam, in order to cross-feed the bridge girder at a predetermined height position, equipment such as a gantry that supports the cross beam by adjusting the installation height of the cross beam is required. It is very difficult to perform installation and removal work of this equipment in a short time, and it takes a long time to complete a series of work, and during that time, these equipments are kept assembled on the site.

  And when a side space is narrow, these facilities may violate construction limits, such as an adjacent road and a railroad. In such a case, the work is performed after traffic restrictions on nearby roads and railways are performed, or the work is performed in anticipation of a time zone without a passing vehicle. However, it is difficult to regulate traffic for a long time, and there is a problem that it is not possible to cope with a time zone when there is no passing vehicle, because it is limited to a very short time.

  The present invention has been completed based on the above circumstances, and a bridge girder erection and removal method capable of shortening the work time at the site and clearing the site in a short time, and the bridge girder used in the method. The purpose is to provide construction equipment.

  As means for achieving the above object, the invention of claim 1 is a bridge girder erection method in which a bridge girder is laterally fed from a side space of a bridge girder erection section, and has a total length longer than that of the erection section. A longitudinal beam member capable of suspending the bridge girder for a long time, a pair of transverse beam members provided at both ends of the longitudinal beam member farther than the distance of the installation section, and between the longitudinal beam member and the transverse beam member A movable support mechanism that is capable of moving the transverse beam member up and down with respect to the longitudinal beam member and capable of moving the longitudinal beam member along the transverse beam member; A longitudinal beam that supports a longitudinal beam member and uses a bridge girder construction device including a transportation mechanism capable of transporting the longitudinal beam member together with the lateral beam member, and transports the longitudinal beam member into a lateral space of the installation section by the transportation mechanism. The carrying-in process and before A horizontal beam installation step of lowering the horizontal beam member by the moving support mechanism in a state where the vertical beam member is supported by the transport mechanism and installing the horizontal beam member across the installation section; and A bridge girder transverse feed process in which the bridge beam is moved along the cross beam member by the moving support mechanism in a state where the bridge girder is suspended, and the bridge girder is laterally fed onto the erection section, and suspended from the vertical beam member. The bridge girder installation step of lowering the lowered bridge girder and installing it on the girder seat provided in the erection section, and the vertical beam member separating the bridge girder from the erection section by the moving support mechanism A vertical beam returning step for returning to the side space and a withdrawal step for supporting the vertical beam member on the transport mechanism and withdrawing from the side space together with the transverse beam member are provided. That.

  According to a second aspect of the present invention, in the method according to the first aspect, in the longitudinal beam carrying-in step, the bridge beam is integrated with the longitudinal beam member in a state in which the bridge girder can be suspended in advance, and the side of the installation section is formed by the transport mechanism. It has the feature in the place where it carries in to the side space.

  The invention of claim 3 is a method for removing a bridge girder, in which the bridge girder is laterally fed from a section of the bridge girder to a side space of the removed section, and the bridge girder is longer than the removed section and can be suspended. A vertical beam member, a pair of horizontal beam members provided at both ends of the vertical beam member farther than the distance of the removal section, and provided between the vertical beam member and the horizontal beam member, A movable support mechanism capable of moving up and down with respect to the longitudinal beam member and capable of moving the longitudinal beam member along the transverse beam member; and supporting the longitudinal beam member Using a bridge girder construction device comprising a transport mechanism capable of transporting this together with the transverse beam member, the longitudinal beam carrying-in step of carrying the longitudinal beam member into a side space of the removal section by the transport mechanism, and the transport mechanism In the vertical beam member A transverse beam installation step of installing the transverse beam member in a state of straddling the removal section by lowering the transverse beam member by the moving support mechanism in a supported state, and the transverse beam member by the moving support mechanism. A longitudinal beam feeding step that moves along the removal section and sends it onto the removal section; a bridge girder installation process that lowers the longitudinal beam member and attaches the bridge girder of the removal section to the longitudinal beam member so as to be suspended; and A bridge girder transverse feed process in which the bridge girder is suspended from a beam member and laterally fed from the removal section to the side space by the moving support mechanism, and the vertical beam member is supported on the transport mechanism. And a withdrawal step of withdrawing from the side space.

  According to a fourth aspect of the present invention, in the method according to the third aspect, in the withdrawal step, the bridge girder suspended from the longitudinal beam member is integrated with the longitudinal beam member, and the side of the removal section is integrated by the transport mechanism. It has the feature that it is withdrawn from the space.

  The invention of claim 5 is a bridge girder construction device for erection of a bridge girder in a erection section or removal of a bridge girder from a detachment section, which is longer than the erection section or the removal section and suspends the bridge girder. A possible longitudinal beam member, a pair of transverse beam members provided at both ends of the longitudinal beam member at a distance greater than the distance of the erection section or the removal section, and provided between the longitudinal beam member and the transverse beam member The horizontal beam member can be moved up and down with respect to the vertical beam member, and the vertical beam member can be moved along the horizontal beam member, and the vertical beam And a transport mechanism capable of supporting the member and transporting the member together with the cross beam member.

  According to a sixth aspect of the present invention, in the fifth aspect of the present invention, the upper surface of the transverse beam member is provided with a track portion extending along a member axial direction of the transverse beam member, and the moving support mechanism is provided along the track portion. It is characterized in that it can be run.

  The invention according to claim 7 is the invention according to claim 5 or claim 6, wherein the transport mechanism can travel on a rail laid in a side space of the erection section or a side space of the removal section. It is characterized in that it has rail running wheels.

  The invention according to claim 8 is the one according to any one of claims 5 to 7, wherein the transport mechanism is capable of traveling in a direction along a member axial direction of the longitudinal beam member, and The cross beam member is characterized in that it can turn in a direction along its traveling direction.

  Invention of Claim 9 is a thing in any one of Claims 5-8. WHEREIN: The said conveyance mechanism supports the said vertical beam member integrated with the said bridge girder, and can be conveyed. It has the characteristics.

  According to a tenth aspect of the present invention, in the ninth aspect, a support mechanism is provided on a lower surface of the vertical beam member, and the vertical beam member is placed on the bridge girder placed on the transport mechanism. It is characterized in that it is supported by the transport mechanism via the bridge girder by contacting the lower surface of the support mechanism.

  The invention of claim 11 is characterized in that, in the invention described in claim 10, the support mechanism is vertically extendable.

<Invention of Claims 1, 3 and 5>
According to the invention of claim 1, claim 3 and claim 5, the vertical beam member is supported at a predetermined height by the movement support mechanism, and the horizontal beam member is moved down so that the construction section or the removal section of the horizontal beam member is After the bridge beam is suspended from the vertical beam member, the bridge beam is moved horizontally on the installation section by moving the vertical beam member along the horizontal beam member by the moving support mechanism. It is possible to feed (when removing the bridge girder from the removal section). As a result, in installing the horizontal beam member, in order to cross-feed the bridge girder at a predetermined height position, it is not necessary to install a facility such as a frame for adjusting the installation height of the horizontal beam member. The work of installing the members can be completed in a short time. In addition, after installing or removing the bridge girder, the cross beam member and the vertical beam member can be quickly withdrawn from the side space, so that it is not necessary to dismantle the cross beam member and the equipment such as the frame as in the past. Well, you can clear the scene in a short time.

<Invention of Claim 2, Claim 4 and Claim 9>
According to invention of Claim 2, Claim 4, and Claim 9, a bridge girder can be integrated with a vertical beam member, and it can carry in to the side space of a construction area, or can be withdrawn from the side space of a removal area. As a result, the bridge girder can be installed or removed at a location other than the site, so that the work time at the site can be reduced correspondingly, and there is no need to secure a space for this operation at the site. . Further, it is not necessary to separately arrange a bridge girder transportation means such as a trailer.

<Invention of Claim 6>
According to the invention of claim 6, since the moving support mechanism can travel in the member axial direction of the cross beam member along the track portion provided on the upper surface of the cross beam member, the movement of the moving support mechanism is within a specified range. Limited to within. As a result, control relating to the movement of the moving support mechanism is facilitated, and the moving support mechanism can be moved smoothly.

<Invention of Claim 7>
According to the invention of claim 7, since the transport mechanism includes the rail traveling wheels that can travel on the rails laid in the side space of the installation section or the side space of the removal section, the transport mechanism is an existing mechanism. The rail is used to smoothly carry in or out of the side space.

<Invention of Claim 8>
According to the invention of claim 8, the transport mechanism can travel in the direction along the member axial direction of the longitudinal beam member, and the transverse beam member can be turned in the direction along the traveling direction. When the vertical beam member is transported together with the horizontal beam member, the horizontal beam member can be turned to be in a direction along the traveling direction of the transport mechanism. Thereby, when conveying, it can avoid that a cross beam member contacts the existing structure (for example, utility pole, various buildings, etc.) installed along the conveyance route.

<Invention of Claim 10>
According to the invention of claim 10, the support mechanism is provided on the lower surface of the vertical beam member, and the vertical beam member is configured to contact the lower surface of the support mechanism with the lower surface of the support mechanism on the bridge beam placed on the transport mechanism. Supported by the transport mechanism. As a result, it is not necessary to provide a support mechanism at a position avoiding the bridge girder on the lower surface of the vertical beam member. The length of the member can be shortened. Therefore, the bridge girder construction apparatus can be made compact and easy to carry.

<Invention of Claim 11>
According to the eleventh aspect of the invention, since the support mechanism can be vertically expanded and contracted, when the longitudinal beam member is supported by the transport mechanism via the bridge girder, the entire support mechanism is contracted by the height of the bridge girder. The height can be suppressed as low as possible, and when the longitudinal beam member is supported without using the bridge girder, the height necessary for transporting the longitudinal beam member can be ensured by extending the support mechanism. In this way, it is possible to keep the overall height as low as possible while securing the predetermined height necessary for transportation by extending and contracting the support mechanism up and down, so that the bridge girder construction device should be made more compact Can do.

  Hereinafter, the construction and removal method of the bridge girder G using the bridge girder construction apparatus 1 of the present embodiment will be described with reference to FIGS. Here, the case where the bridge girder G is constructed on the down line side or removed from the down line side in the double-track section of the railway as shown in FIG. 5 will be described. Note that a main rail R (corresponding to the rail of the present invention) is laid on a portion excluding the installation section C or the removal section D on the down line side and on the up line side.

  FIG. 1 is a side view showing a state in which the bridge girder construction apparatus 1 of the present embodiment is carried into the side space S of the erection section C at the time of erection, and FIGS. AA sectional view, BB sectional view, and plan view of FIG. Hereinafter, in each component, the right side (orbit motor car 44 side) in FIG. 1 will be described as the front and the left side as the rear.

  First, the bridge girder construction apparatus 1 will be described. The bridge girder construction apparatus 1 is for erection of the bridge girder G in the erection section C or removal of the bridge girder G from the removal section D.

  The bridge girder construction apparatus 1 includes a vertical beam member 10 that suspends a bridge girder G. The vertical beam member 10 is made of steel, and has a rectangular tube shape that is slightly longer than the length of the erection section C in which the bridge girder G is to be erected (the removal period D in which the bridge girder G is to be removed at the time of removal).

  At both the front and rear ends of the vertical beam member 10, there are provided a horizontal device 20 (corresponding to the moving support mechanism of the present invention) capable of supporting the vertical beam member 10 and the vertical beam member 10 in a state where the bridge girder G is suspended. It has been. Each preemption device 20 includes four support columns 21 that are long in the vertical direction. The lower end of the support column 21 is supported by a rotating base 22 that is rotatably connected around a line that is equidistant from the axes of the four support columns 21 as a central axis. The rotating pedestal 22 has a substantially rectangular plate shape, and two pairs of wheels 23 are provided on the lower surface thereof.

  A transverse beam member 30 is provided below each rotary base 22. These transverse beam members 30 are located at both ends of the longitudinal beam member 10 and are provided at a distance longer than the interval between the erection section C or the removal section D. As shown in FIG. 2, the cross beam member 30 is composed of two H-shaped steels 31, and the abdominal portions 31 </ b> A of the respective H-shaped steels 31 are arranged in parallel so as to extend in the vertical direction. It is connected by. Further, on the upper surface of the upper flange portion 31B of each H-shaped steel 31, a side rail 33 (corresponding to the track portion of the present invention) on which the wheel 23 provided on the lower surface of the rotating base 22 can travel is provided. . The horizontal rails 33 extend along the axial direction of the member in the member width direction in the upper flange portion 31B, that is, at a position corresponding to the abdominal portion 31A. The distance between the pair of wheels 23 provided is approximately the same as the distance between the wheels 23, and the wheels 23 can travel on the horizontal rail 33. The horizontal beam member 30 can be suspended below the rotary pedestal 22 by a plurality of steel rods 34. By rotating the rotary pedestal 22 in this suspended state, the horizontal beam member 30 is 10 can be turned between an orientation along the axial direction of 10 and an orientation substantially perpendicular to the axial direction of the longitudinal beam member 10 (see also FIG. 6).

  On the upper surface of the new bridge girder G installed in the erection section C (the bridge girder G to be removed from the removal section D at the time of removal) A pair of left and right girder hanging pieces 13 is provided at one place. On the other hand, in the longitudinal beam member 10, the beam suspension portions 11 are provided at two positions before and after the position corresponding to the beam suspension piece 13. As shown in FIG. 4, each girder suspension portion 11 has a beam shape projecting to the left and right outside of the left and right width of the vertical beam member 10, and chain blocks 12 that suspend the bridge girder G are lowered at both ends thereof. Yes. By connecting the chain block 12 of the beam suspension portion 11 to the beam suspension piece 13 of the bridge beam G, the bridge beam G can be suspended from the vertical beam member 10.

  Below the bridge girder G and the longitudinal beam member 10, two transport carts 40 (corresponding to the transport mechanism of the present invention) for transporting these are placed in front and rear (see FIG. 1). The two transport trolleys 40 are arranged at a predetermined interval so that they can be supported in a balanced manner in the front-rear direction when the longitudinal beam member 10 or the bridge beam G and the longitudinal beam member 10 are placed. Each carriage 40 includes rail running wheels 41 that can run on rails, and can run on a main line rail R laid on an up line or a rail of a lead-in line (not shown) branched from the main line rail R. Has been. Further, the transport carriage 40 transports the longitudinal beam member 10 such that the member axial direction is oriented along the traveling direction. The carriage 40 is provided with an outrigger, and can maintain stability while supporting the longitudinal beam member 10 or the bridge beam G and the longitudinal beam member 10.

  Each carriage 40 is provided with a girder mounting portion 42 on which the bridge girder G and the vertical beam member 10 are placed. The girder 42 has a substantially rectangular plate shape having a lateral width substantially the same as the lateral width of the bridge girder G when viewed from above (see also FIG. 9). As shown in FIG. 3, lever blocks 43 are provided at both left and right ends of the girder mounting portion 42. Of the front and rear transport carts 40, a track motor car 44 is connected to the front transport cart 40 by a connecting rod 45, and the bridge girder construction device 1 is pulled by the track motor car 44.

  A telescopic bend 14 (corresponding to the support mechanism of the present invention) that can be placed on the bridge beam G or the carriage 40 is provided on the lower surface of the vertical beam member 10 (see FIG. 1). The telescopic bends 14 are arranged at two front and rear locations corresponding to the two transport carts 40 on the lower surface of the vertical beam member 10, respectively, and at the lower portion thereof, a base portion facing the upper surface of the girder 42 of the transport cart 40. 15 is provided (see FIG. 3). The base portion 15 has a substantially rectangular plate shape having substantially the same width as the left and right width of the bridge girder G, and a lever block 43 provided in the transport carriage 40 is connected to both ends in the lateral direction. It has become. Then, by placing the bridge girder G on the girder mounting part 42 and bringing the base part 15 into contact therewith, the bridge girder G is moved by the girder mounting part 42 and the base part 15 by operating the lever 43A of the lever block 43. The positional deviation is prevented by being sandwiched. Thus, the vertical beam member 10 is supported by the carriage 40 via the bridge girder G by bringing the lower surface of the base portion 15 of the telescopic bend 14 into contact with the bridge girder G placed on the carriage 40. It has become. The telescopic bend 14 has a telescopic function that can be expanded and contracted in the vertical direction, and the vertical distance between the bridge beam G and the vertical beam member 10 is adjusted by the telescopic bend 14 extending and contracting in the vertical direction. It has become.

  On the upper surface of the vertical beam member 10, two bend suspension beams 16 are provided at two positions in front and rear corresponding to the telescopic bend 14. As shown in FIG. 3, the bend suspension beam 16 is a beam member projecting in the left-right direction with respect to the width in the left-right direction of the vertical beam member 10, and steel rods 17 are provided at both ends thereof. The telescopic bend 14 is fixed to the vertical beam member 10 by the steel rod 17 in a form suspended from the bend suspension beam 16 with the vertical beam member 10 interposed therebetween. Thus, the telescopic bend 14 can be suspended from the longitudinal beam member 10.

  Each horizontal capturing device 20 includes a vertical beam receiving portion 24 having a lift function (see FIG. 2). The vertical beam receiving portion 24 moves up and down along the four columns 21 and can be fixed to the column 21 so as not to move up and down at an arbitrary height. The ends of the vertical beam members 10 are connected to the vertical beam receiving portions 24, and the vertical beam receiving portions 24 are vertically moved with respect to the support columns 21 to be fixed vertically. The height position of the beam member 10 can be set arbitrarily. Further, in a state where the vertical beam member 10 is supported by the transport carriage 40, the column 21 is moved up and down with respect to the vertical beam receiving unit 24 and the column 21 is moved up and down at an arbitrary height with respect to the vertical beam receiving unit 24. Can be fixed impossible. Thereby, the height position of the horizontal beam member 30 provided at the lower end of the column 21 is arbitrarily set with respect to the vertical beam member 10 by moving the column 21 up and down with respect to the vertical beam receiving portion 24 and fixing it. It can be done.

  Further, when the crossing device 20 travels along the crossing rail 33 of the cross beam member 30, the vertical beam member 10 connected to the vertical beam receiving portion 24 moves along the cross beam member 30. Yes. In addition, the horizontal capture device 20 can move the vertical beam receiving portion 24 up and down while traveling on the horizontal beam member 30.

A. Construction Method of Bridge Girder Next, a construction method of the bridge girder G using the bridge girder construction apparatus 1 described above will be described.
This erection method uses the bridge girder construction apparatus 1 and installs the longitudinal beam member 10 into the lateral space S of the erection section C and the transverse beam member 30 across the erection section C. A horizontal beam installation process, a bridge girder horizontal feed process in which a new bridge girder G suspended from the vertical beam member 10 is laterally fed onto the construction section C, a bridge girder installation process in which the bridge girder G is installed on the bridge seat A, and a vertical beam The bridge girder G is installed in the installation section by performing a longitudinal beam returning process for returning the member 10 from the construction section C to the side space S and a withdrawal process for removing the longitudinal beam member 10 together with the transverse beam member 30 from the side space S. This is a construction method of the bridge girder G installed in C.

Hereinafter, this process will be described step by step.
(1) Carrying-in process of the longitudinal beam member 10 At the base of the bridge girder construction apparatus 1 of the present embodiment, a lead-in line branched from the main line rail R on the up line side is laid. On the rail of the lead-in line, the bridge bend G and the vertical beam member 10 are supported by the two transport carts 40 while aligning the telescopic bend 14 and the transport cart 40 on the vertical axis. At this time, the bridge girder G is firmly clamped and fixed between the transport carriage 40 and the telescopic bend 14, and the horizontal beam member 30 is suspended from both ends of the vertical beam member 10 (see FIG. 1). Further, the chain block 12 of the beam suspension part 11 is connected to the beam suspension piece 13 of the bridge beam G.
Then, the track motor car 44 is connected to the front carriage 40 using the connecting rod 45, and the bridge beams G and the vertical beam members 10 are arranged with the front and rear transverse beam members 30 oriented along the traveling direction of the carriage 40. The loaded carriage 40 is pulled by the track motor car 44 so as to travel along the main line rail R on the up line side from the pull-in line rail. Thus, the bridge girder G and the vertical beam member 10 are advanced until they reach the side space S of the installation section C, and the vertical beam member 10 is carried into the side space S of the installation section C (see FIG. 5).

(2) Installation Step of Cross Beam Member 30 Next, the cross beam member 30 is installed in a state of straddling the installation section C. FIG. 6 is a plan view showing a state of the horizontal beam installation process, and FIGS. 7 and 8 are a side view and a cross-sectional view taken along the line CC in FIG.
First, the horizontal beam member 30 that is oriented along the member axial direction of the vertical beam member 10 is rotated in the direction along the member axial direction of the vertical beam member 10 by rotating the rotary base 22 of the horizontal capturing device 20. On the other hand, it is swung in a substantially perpendicular direction, that is, in a direction in which the cross beam member 30 is bridged between the vertical lines (see FIG. 6). Then, the connecting rod 45 that connects the track motor car 44 and the transport carriage 40 is cut off, and the receiving beams 35 are installed on both sides of each main rail R on the lower side of the horizontal beam member 30. The receiving beam 35 is made of an H-shaped steel 31 having a cross-sectional height larger than that of the main rail R, and the abdomen extends in the up-down direction and extends 4 up and down. A total of 8 books will be installed. Note that the length of the receiving beam 35 is longer than the dimension of the transverse beam member 30 in the member width direction. Further, the lower surface (surface on the ground surface side) of the receiving beam 35 is provided with a cushioning material 35A made of a single-size plate.
Next, the struts 21 of both the front and rear transverse devices 20 are lowered with respect to the vertical beam receiving portion 24, and when the lower surface of the horizontal beam member 30 comes into contact with the receiving beam 35, the strut 21 is moved up and down with respect to the vertical beam receiving portion 24. Fix immovable. By supporting the cross beam member 30 on the receiving beam 35, the height position of the cross beam member 30 can be finely adjusted so that the cross beam member 30 can be installed substantially horizontally, and the crossing device 20 moves on the cross beam member 30. Such vibrations are absorbed by the receiving beam 35. Thus, the front and rear transverse beam members 30 are respectively installed in the front and rear spaces of the installation section C on the down line, that is, installed in a state of straddling the installation section C, and the vertical beam member 10 is supported by the front and rear both-side capture device 20. It will be in the state.

(3) Transverse feeding step of bridge girder G Next, the bridge girder G for new installation suspended from the vertical beam member 10 is laterally fed onto the construction section C. FIG. 9 is a plan view showing the state of the bridge girder G transverse feed process, and FIGS. 10 and 11 are a side view and a DD cross-sectional view of FIG.
First, the lever block 43 connecting the telescopic bend 14 and the transport carriage 40 is loosened and removed to release the position shift prevention of the bridge girder G, and the vertical beam receiving portion 24 of the crossing device 20 is raised. Then, when the crossing device 20 is moved laterally (from the up line side to the down line side) along the crossing rail 33 on the cross beam member 30, the chain block 12 causes the beam suspension part 11 of the vertical beam member 10 to move. The suspended bridge girder G also moves from the ascending line side to the descending line side along with the preemption device 20 (see FIG. 9). When the bridge girder G is sent out, the transport carriage 40 is kept in the side space S (on the up line), and the bridge girder G is sent out on the construction section C (on the down line) while being suspended from the girder suspension portion 11. It is.
Then, when both the front and rear interceptors 20 reach a predetermined position on the down line side, the interceptors 20 are stopped. As a result, the bridge girder G suspended from the vertical beam member 10 is suspended from the installation section C at a position corresponding to the installation position of the bridge girder G.

(4) Installation Step of Bridge Girder Next, the bridge girder G is installed on the bridge seat A (corresponding to the girder seat portion of the present invention) in the erection section C. FIG. 12 is a side view showing the bridge girder installation process, and FIG. 13 is a cross-sectional view taken along line EE of FIG.
First, the longitudinal beam member 10 is lowered by lowering the longitudinal beam receiving portion 24 in both the front and rear interceptors 20. Then, when the bridge girder G suspended from the vertical beam member 10 reaches the position of the bridge A, both vertical beam receiving portions 24 are fixed so as not to move up and down, and the bridge girder G is set at a predetermined position. Is removed, and the bridge girder G is installed on the bridge seat A. Note that the vertical beam receiving portion 24 may be lowered while moving the horizontal capturing device 20.

(5) Returning process of the longitudinal beam member 10 Next, the longitudinal beam member 10 with the bridge girder G lowered is returned to the side space S. FIG. 14 is a plan view showing the state of the longitudinal beam returning process, and FIG. 15 is a side view of FIG.
First, the vertical beam member 10 is raised from the installation position of the bridge girder G by raising the vertical beam receiving portion 24 in both the front and rear interceptors 20. As the vertical beam member 10 is raised, the telescopic bend 14 placed on the upper surface of the bridge girder G is suspended from the bent suspension beam 16 by the steel rod 17. Then, the front and rear vertical beam receiving portions 24 are fixed so as not to move up and down, and the telescopic bend 14 is set to extend by the height of the bridge girder G. As a result, when the vertical beam member 10 is placed on the transport carriage 40 without the bridge girder G interposed therebetween, a height capable of suspending the horizontal capture devices 20 at both front and rear ends of the vertical beam member 10 is secured. Yes. Next, when the crossing device 20 is moved laterally (from the down line side to the up line side) along the cross beam member 30, the vertical beam member 10 is also moved from the down line side to the up line side. When the telescopic bend 14 reaches the carriage 40 that is kept on the up line, the movement of the preemption device 20 is stopped. The raising of the vertical beam receiving portion 24 and the height adjustment of the telescopic bend 14 may be performed simultaneously.

(6) Withdrawing step Next, the longitudinal beam member 10 is withdrawn from the side space S together with the transverse beam member 30. FIG. 16 is a side view showing a state in which the vertical beam member 10 is supported on the transport carriage 40, and FIG. 17 shows a state in which the horizontal beam member 30 is turned in the direction along the traveling direction of the transport carriage 40. A plan view is shown in FIG. 18, and a side view showing the state of the withdrawal process is shown.
First, the longitudinal beam member 10 is lowered by lowering both the front and rear longitudinal beam receiving portions 24 so that the telescopic bend 14 is placed on the transport carriage 40. In this way, after the vertical beam member 10 is supported by the transport carriage 40, the column 21 of the front and rear both-side capture device 20 is raised to a position where the horizontal beam member 30 at the lower end floats from the receiving beam 35. Then, the vertical beam member 10 is supported by the two front and rear transport carts 40 (see FIG. 16). Then, the transverse beam member 30 facing in the lateral direction (substantially perpendicular to the axial direction of the longitudinal beam member 10) is turned in the axial direction of the longitudinal beam member 10, that is, the direction along the traveling direction of the transport carriage 40 ( FIG. 17). Thereafter, the receiving beam 35 installed on the side of the main rail R is removed, the track motor car 44 is connected to the front carriage 40, and the track motor car 44 is advanced along the main rail R so that the vertical The beam member 10 and the cross beam member 30 are removed from the side space S and further transported to the base.

B. Method for Removing Bridge Girder G Next, a method for removing the bridge girder G using the above-mentioned bridge girder construction apparatus 1 will be described.
The method for removing the bridge girder G basically follows the reverse process of the construction method described above.
This removal method uses the bridge girder construction apparatus 1 and installs the longitudinal beam member 10 into the lateral space S of the removal section D and the transverse beam member 30 across the removal section D. Horizontal beam installation process, vertical beam feeding process for sending the vertical beam member 10 onto the removal section D, bridge girder installation process for attaching the bridge girder G so that it can be suspended on the vertical beam member 10, and hanging the girder G on the vertical beam member 10 The bridge girder G is obtained by performing a bridge girder horizontal feed process that transversally feeds from the removal section D to the side space S and a withdrawal process that withdraws the vertical beam member 10 together with the cross beam member 30 from the side space S. This is a method of removing the bridge girder G to be removed from the removal section D.

Hereinafter, this process will be described step by step. In addition, it demonstrates using the drawing used for description of the construction method, and abbreviate | omits description about the part which overlaps with the construction method.
(1) Carry-in process of the longitudinal beam member 10 At the base, the bridge girder construction apparatus 1 is installed on the rail of the lead-in line.
First, the vertical beam member 10 is supported by the two transport carts 40 while the telescopic bend 14 and the transport cart 40 are aligned on the vertical axis. At this time, the horizontal beam member 30 is suspended from both ends of the vertical beam member 10 as shown in FIG.
Then, the transport cart 40 on the front side is connected to the track motor car 44 by the connecting rod 45, the front and rear transverse beam members 30 are oriented along the traveling direction of the transport cart 40, and the transport cart 40 on which the vertical beam member 10 is placed. Is towed by the track motor car 44 to travel along the main line rail R on the up line side from the pull-in line rail. Thus, the vertical beam member 10 is advanced to the side space S of the removal section C and is carried into the side space S of the removal section C.

(2) Installation Step of Cross Beam Member 30 Next, the cross beam member 30 is installed in a state of straddling the removal section D.
As in the case of the above-described erection, the transverse beam member 30 that is oriented along the member axial direction of the longitudinal beam member 10 is turned to the direction spanned between the upper and lower lines, and is placed on the receiving beam 35 installed in advance. The horizontal beam member 30 is lowered and supported, and the vertical beam receiving portion 24 is fixed so as not to move up and down (see FIGS. 14 and 15). As a result, both the front and rear horizontal beam members 30 are installed in a state of straddling the removal section D in the down line, and the vertical beam member 10 is supported by the front and rear both horizontal capture devices 20.

(3) Feeding process of longitudinal beam member 10 Next, the longitudinal beam member 10 is laterally fed onto the removal section D.
First, the longitudinal beam receiving portion 24 is raised in both the front and rear interceptors 20, so that the telescopic bend 14 placed on the upper surface of the transport carriage 40 is suspended from the longitudinal beam member 10. Then, the front and rear vertical beam receiving portions 24 are fixed so as not to move up and down, and the telescopic bend 14 is set by being contracted by the height of the bridge girder G (see FIG. 12). As a result, when the vertical beam member 10 is placed on the transport carriage 40 via the bridge girder G, the overall height is made as low as possible while ensuring a height at which the horizontal capturing device 20 can be suspended.
Then, when the crossing device 20 is moved laterally (from the up line side to the down line side) along the crossing rail 33 on the cross beam member 30, the vertical beam member 10 also rises along with the crossing device 20. Move from the line side to the down line side. When the vertical beam member 10 is sent out, the carriage 40 is kept in the side space S (on the up line), and the vertical beam member 10 is sent out on the removal section D (on the down line) (see FIG. 9).
Then, when both the front and rear interceptors 20 reach a predetermined position on the down line side, the interceptors 20 are stopped. Thereby, the vertical beam member 10 will be in the state which reached the upper position of the bridge girder G to remove on the removal area D. FIG. The raising of the vertical beam receiving portion 24 and the height adjustment of the telescopic bend 14 may be performed simultaneously.

(4) Step of attaching bridge girder G to be removed Next, the bridge girder G to be removed is attached to the longitudinal beam member 10.
First, the longitudinal beam member 10 is lowered by lowering the longitudinal beam receiving portion 24 in both the front and rear interceptors 20. When the vertical beam member 10 reaches a height at which the bridge girder G can be suspended, the vertical beam receiving portions 24 are fixed so as not to move up and down, and the lower surface of the telescopic bend 14 is brought into contact with the upper surface of the bridge girder G. In this state, the beam suspension part 11 of the longitudinal beam member 10 and the bridge beam G are connected by the chain block 12.

(5) Transverse feed process of bridge girder G to be removed Next, the bridge girder G suspended from the longitudinal beam member 10 is laterally fed from the removal section D to the side space S.
First, when the vertical beam receiving portion 24 of the horizontal beam device 20 is raised and the horizontal beam device 20 is moved laterally (downward line side to upward line side) along the horizontal rail 33 on the horizontal beam member 30, The bridge girder G suspended from the vertical beam member 10 also moves from the down line side to the up line side along with the steerer 20. Then, when the telescopic bend 14 of the vertical beam member 10 reaches the transport carriage 40 that is kept on the up line, the movement of the preemption device 20 is stopped (see FIG. 6).

(6) Withdrawing process Next, the longitudinal beam member 10 and the bridge beam G are withdrawn from the side space S together with the transverse beam member 30.
First, the longitudinal beam member 10 is lowered by lowering the front and rear longitudinal beam receiving portions 24, and the bridge girder G is placed on the transport carriage 20 (see FIG. 7). Then, when the horizontal beam member 30 is raised to a position where it floats from the receiving beam 35, the vertical beam member 10 and the bridge girder G are supported by the two front and rear transport carts 40 (see FIG. 1). Then, the transverse beam member 30 is turned in the direction along the traveling direction of the transport carriage 40 and the track motor car 44 is advanced along the main rail R, so that the longitudinal beam member 10 and the bridge girder G are moved sideways together with the transverse beam member 30. Remove from space S and transport to base.

  As described above, when the bridge girder G is installed or removed by using the bridge girder construction apparatus 1 according to the present embodiment, the vertical beam member 10 is supported at a predetermined height by the horizontal capturing device 20, and the transverse beam member The horizontal beam member 30 can be installed in a state of straddling the installation section C or the removal section D by lowering 30, and after the bridge beam G is suspended from the vertical beam member 10, the vertical beam member 10 Is moved along the cross beam member 30 by the cross-trapping device 20, the bridge girder G can be laterally fed onto the erection section C (the bridge girder G can be laterally fed from the removal section D at the time of removal). As a result, in installing the horizontal beam member, in order to laterally feed the bridge girder G at a predetermined height position, it is not necessary to install a facility such as a stand for adjusting the installation height of the horizontal beam member. The work of installing the cross beam member can be completed in a short time. In addition, after installing or removing the bridge girder G, the cross beam member 30 and the vertical beam member 10 can be quickly withdrawn from the side space S. It is not necessary to do so, and the site can be revealed in a short time.

  Further, the bridge girder G can be integrated into the vertical beam member 10 and carried into the side space S of the erection section C or removed from the side space S of the removal section D. As a result, the installation or removal of the bridge girder G can be performed at a place other than the site, so that the work time at the site can be reduced correspondingly, and there is no need to secure a space for this work at the site. Good. Further, it is not necessary to separately arrange a bridge girder transportation means such as a trailer.

  In addition, since the crossing device 20 can travel in the member axial direction of the cross beam member 30 along the cross rail 33 provided on the upper surface of the cross beam member 30, the movement of the crossing device 20 is within a specified range. Limited to within. Thereby, the control which concerns on the movement of the preemption apparatus 20 becomes easy, and the preemption apparatus 20 can be moved smoothly.

  Further, since the carriage 40 includes rail running wheels 41 that can travel on rails, the main line laid in the side space S of the construction section C (the side space S of the removal section D when removed). It can run on the rail of the lead-in line branched from the rail R or the main rail R. Accordingly, the transport carriage 40 is smoothly carried into or out of the side space S using the existing main rail R.

  Since the transport carriage 40 can travel in the direction along the member axial direction of the longitudinal beam member 10 and the lateral beam member 30 can turn in the direction along the traveling direction, the longitudinal beam member When transporting 10 together with the cross beam member 30, the cross beam member 30 can be turned to be in a direction along the traveling direction of the transport carriage 40. Thereby, when carrying, it can avoid that the cross beam member 30 contacts the existing structure (for example, utility pole, various buildings, etc.) installed in the roadside of a conveyance path | route.

  The telescopic bend 14 is provided on the lower surface of the vertical beam member 10, and the vertical beam member 10 is brought into contact with the lower surface of the telescopic bend 14 on the bridge beam G placed on the transport carriage 40. It is supported by the transport carriage 40 via G. As a result, the telescopic bend 14 does not have to be disposed at the lower surface of the vertical beam member 10 so as to avoid the bridge beam G. Therefore, the telescopic bend 14 and the bridge beam G are separated in the member axial direction of the vertical beam member 10. Compared with the arrangement, the length of the vertical beam member 10 can be shortened. Therefore, the bridge girder construction apparatus 1 can be made compact and easy to carry.

  In addition, since the telescopic bend 14 can be vertically expanded and contracted, when the longitudinal beam member 10 is supported on the transport carriage 40 via the bridge girder G, the telescopic bend 14 is contracted by the height of the bridge girder G. The overall height can be kept as low as possible, and when the longitudinal beam member 10 is supported without the bridge girder G, the height required for transporting the longitudinal beam member 10 by extending the telescopic bend 14 is increased. Can be secured. In this way, the telescopic bend 14 can be expanded and contracted up and down, so that the overall height can be kept as low as possible while ensuring the predetermined height necessary for transportation. Can be.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.

  (1) In the above embodiment, the method for installing and removing the bridge girder G has been described. However, the bridge girder can be replaced by using the method for installing and removing the bridge girder together.

  (2) In erection and removal of the bridge girder G using the bridge girder construction apparatus 1 according to the embodiment, it is possible to cope with erection and removal of various bridge girder such as steel girder, RC girder, PC girder and the like.

  (3) In the above embodiment, the method of installing or removing one bridge girder G for each span has been described. However, the present invention is not limited to this, or a plurality of bridge girders are installed side by side for each span, or It can also be applied to removing existing bridge girders that are lined up.

  (4) In the erection method of the above embodiment, the bridge girder G is attached and then loaded into the side space S of the erection section C. However, the present invention is not limited thereto, and after the longitudinal beam member 10 is loaded into the side space S, The bridge girder G may be attached in the side space S.

  (5) In the removal method of the above embodiment, the bridge girder G is carried out from the side space S of the removal section D in a state where the bridge girder G is attached, but not limited to this, even if the bridge girder G is removed in the side space S Good.

  (6) In the above embodiment, the horizontal beam member 30 is lowered and supported on the receiving beam 35. However, the horizontal beam member does not necessarily have to be supported on the receiving beam, for example, via a buffer member. You may make it support on a main line rail.

  (7) In the above embodiment, the front and rear horizontal beam members 30 are transported in a state of being floated from the main rail R at the time of transport. However, the present invention is not limited to this. You may do it.

  (8) In the above embodiment, the cross beam member 30 is made of the two H-shaped steels 31, but is not limited to this, and may be a combination of various steel plate materials, for example.

  (9) In the above embodiment, the cross beam 33 is provided on the upper surface of the cross beam member 30 so that the wheel 23 provided at the lower end of the cross device 20 can travel. For example, a tire that can run on a flat surface may be provided at the lower end of the intercepting device, and the upper surface of the transverse beam member may be moved. At this time, a side wall or the like may be provided on the peripheral edge of the cross beam member so that the tire does not escape from the cross beam member.

  (10) In the said embodiment, although the conveyance trolley 40 is provided with the rail driving | running | working wheel 41 which can drive | work on a rail, it is not restricted to this, For example, you may be provided with the tire which can drive | work a road surface without a rail.

  (11) In the above embodiment, the horizontal beam member 30 is turned between the direction along the axial direction of the vertical beam member 10 and the direction substantially perpendicular to the axial direction of the vertical beam member 10. However, the transverse beam member does not have to be able to turn.For example, when the width of the conveying path for conveying the longitudinal beam member and the transverse beam member is sufficiently wide, the transverse beam member is not necessarily arranged in the axial direction of the longitudinal beam member, that is, It is not necessary to travel in the direction along the traveling direction of the transport cart.

  (12) In the above embodiment, the vertical beam member 10 is supported by the transport carriage 40 via the telescopic bend 14, but the vertical beam member is not necessarily supported by the transport cart via the telescopic bend. For example, a columnar support member may be provided on the transport carriage so that the vertical beam member is supported by the support member.

  (13) In the above embodiment, the telescopic bend 14 has a telescopic function that can be expanded and contracted in the vertical direction. For example, in a transportation route or a side space, a viaduct is bridged in the upper space or a train. In the case where there is no restriction such as an overhead line or the like, a bend that does not have a telescopic function may be used instead of the telescopic bend.

Side view showing a state where the bridge girder construction apparatus of the present embodiment is carried into the side space of the construction section at the time of construction Front view of bridge girder construction equipment in the state of FIG. AA sectional view of FIG. BB sectional view of FIG. Plan view of FIG. Plan view showing the cross beam installation process Side view of FIG. CC sectional view of FIG. Plan view showing the bridge girder feed process Side view of FIG. DD sectional view of FIG. Side view showing the bridge girder installation process EE sectional view of FIG. Plan view showing the vertical beam return process Side view of FIG. Side view showing a state in which the vertical beam member is supported on the carriage The top view which shows a mode that the horizontal beam member was turned in the direction along the traveling direction of a conveyance trolley. Side view showing the withdrawal process

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Bridge girder construction apparatus 10 ... Longitudinal beam member 14 ... Telescopic bend (support mechanism)
20 .. Preparatory device (moving support mechanism)
30 ... Horizontal beam member 33 ... Horizontal rail (track)
40 ... Transport cart (transport mechanism)
41 ... rail running wheel A ... bridge seat (girder seat)
C ... Erecting section D ... Removal section G ... Bridge girder R ... Main rail
S ... Side space

Claims (11)

A bridge girder construction method in which a bridge girder is laterally fed from a side space of a bridge girder construction section,
A longitudinal beam member that is longer than the erection section and can suspend the bridge girder,
A pair of transverse beam members provided at both ends of the longitudinal beam member farther away than the distance of the erection section;
Provided between the longitudinal beam member and the transverse beam member, the transverse beam member can be moved up and down with respect to the longitudinal beam member, and the longitudinal beam member is moved along the transverse beam member A movable support mechanism that can be moved;
Using a bridge girder construction device comprising a transport mechanism that supports the vertical beam member and can transport it along with the horizontal beam member,
A longitudinal beam carrying-in step of carrying the longitudinal beam member into a lateral space of the installation section by the transport mechanism;
A transverse beam installation step of installing the transverse beam member across the installation section by lowering the transverse beam member by the movement support mechanism in a state where the longitudinal beam member is supported by the transport mechanism;
A bridge girder transverse feed step of transversally feeding the bridge girder on the erection section by moving the longitudinal beam member along the transverse beam member by the movement support mechanism as a state in which the bridge girder is suspended from the longitudinal beam member;
A bridge girder installation step of lowering the bridge girder suspended from the longitudinal beam member and installing the bridge girder on the girder seat provided in the erection section;
A longitudinal beam returning step of returning the longitudinal beam member that has separated the bridge girder from the construction section to the lateral space by the moving support mechanism;
A method for constructing a bridge girder, comprising: a step of supporting the vertical beam member on the transport mechanism and withdrawing from the side space together with the horizontal beam member. The said longitudinal beam carrying-in process is integrated in the state which can hang | suspend the said bridge girder in the said longitudinal beam member previously, and it carries in to the side space of the said installation area by the said conveyance mechanism. How to build bridge girders. A method for removing a bridge girder by laterally feeding a bridge girder from a section of a bridge girder to a side space of the removed section.
A longitudinal beam member that is longer than the removal section and can suspend the bridge girder,
A pair of transverse beam members provided farther than the distance of the removal section at both ends of the longitudinal beam member;
Provided between the longitudinal beam member and the transverse beam member, the transverse beam member can be moved up and down with respect to the longitudinal beam member, and the longitudinal beam member is moved along the transverse beam member A movable support mechanism that can be moved;
Using a bridge girder construction device comprising a transport mechanism that supports the vertical beam member and can transport it along with the horizontal beam member,
A longitudinal beam carrying-in step of carrying the longitudinal beam member into a lateral space of the removal section by the transport mechanism;
A transverse beam installation step of installing the transverse beam member across the removal section by lowering the transverse beam member by the movement support mechanism in a state where the longitudinal beam member is supported by the transport mechanism;
A longitudinal beam feeding step of moving the longitudinal beam member along the transverse beam member by the movement support mechanism and feeding it on the removal section;
A bridge girder mounting step of lowering the vertical beam member and attaching the bridge girder of the removal section to the vertical beam member so as to be suspended;
A bridge girder lateral feed step of laterally feeding from the removal section to the lateral space by the moving support mechanism as a state where the bridge girder is suspended from the vertical beam member,
A removal step of supporting the vertical beam member on the transport mechanism and withdrawing from the side space together with the horizontal beam member. The said withdrawal process WHEREIN: The said bridge beam suspended by the said longitudinal beam member is integrated with the said longitudinal beam member, and it withdraws from the side space of the said removal area by the said conveyance mechanism. How to remove the bridge girder. A bridge girder construction device for erection of a bridge girder from a construction section or removal of a bridge girder from a removal section,
A longitudinal beam member that is longer than the installation section or the removal section and that can suspend the bridge girder,
A pair of transverse beam members provided at both ends of the longitudinal beam member and spaced apart from the distance of the erection section or the removal section;
Provided between the longitudinal beam member and the transverse beam member, the transverse beam member can be moved up and down with respect to the longitudinal beam member, and the longitudinal beam member is moved along the transverse beam member A movable support mechanism that can be moved;
A bridge girder construction apparatus comprising: a transport mechanism that supports the vertical beam member and can transport the vertical beam member together with the horizontal beam member. The upper surface of the cross beam member is provided with a track portion extending along the member axial direction of the cross beam member, and the moving support mechanism is capable of traveling along the track portion. Equipment for bridge girder construction as described. The said conveyance mechanism is equipped with the rail travel wheel which can drive | work on the rail laid in the side space of the said installation area, or the side space of the said removal area, The Claim 5 or Claim 6 characterized by the above-mentioned. Equipment for bridge girder construction. The transport mechanism is capable of traveling in a direction along a member axial direction of the longitudinal beam member, and the transverse beam member is capable of turning in a direction along the traveling direction. The bridge girder construction apparatus according to any one of claims 5 to 7. 9. The bridge girder construction apparatus according to claim 5, wherein the transport mechanism is configured to support and transport the longitudinal beam member integrated with the bridge girder. A support mechanism is provided on the lower surface of the vertical beam member, and the vertical beam member is brought into contact with the lower surface of the support mechanism on the bridge girder placed on the transport mechanism, thereby conveying the transport beam via the bridge girder. The bridge girder construction apparatus according to claim 9, wherein the bridge girder construction apparatus is supported by a mechanism. 11. The bridge girder construction apparatus according to claim 10, wherein the support mechanism can be vertically expanded and contracted.

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