JP2011047117A - Construction method for launching bridge girder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction method for launching a bridge girder, in which the wide bridge girder equipped with a plurality of main girders can be turned in a stably balanced manner by means of a straight track. <P>SOLUTION: In this construction method for launching the bridge girder, front and rear trucks 13 and 14, on which a bridge girder member H is placed, travel to construct the bridge girder member from a first bridge pier P2 to a second bridge pier P1. The bridge girder member H is the wide bridge girder which is provided with the main girders HA and HB on both sides. The construction method includes a turning step of turning the bridge girder member H on a turning base 31 as a supporting point, by supporting one HA of the main girders by the turning base 31 installed on the first bridge pier P2, and moving the plurality of main girders HA and HB, on the side of the first bridge pier P2, of the bridge girder member H by means of the straight track 21 installed on the second bridge pier P1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a bridge girder delivery method that bridges a bridge girder from a first pier to a second pier by running a delivery carriage on which a bridge girder member is placed.

When building a bridge on a railway track or on an expressway, a ground yard is installed on the rear extension line of the construction point, a bridge girder member is assembled on the ground yard, and the assembled bridge girder member is placed on the ground yard. A bridge girder delivery method is carried out in which a bridge girder member is sent from a first pier to a second pier, and is placed on a delivery carriage movable on a track installed in the road.
Here, there are cases where the bridge girder member has a curved portion, or the ground yard cannot be secured on the extension of the bridge position. In this case, a rotation process for rotating the delivered bridge girder member is required. Conventionally, a rotating track is used to perform the rotating process. However, since a precise work is required to manufacture the rotating track, there is a problem of increasing costs. Moreover, since it is a narrow space on a bridge pier etc., it may be difficult to install a rotation track | orbit depending on the installation place.

A means for solving the above problems is proposed in Patent Document 1. As shown in FIG. 17, a plurality of vents 101 and 102 are installed near the second pier, and a linear track 103 is installed on the plurality of vents 101 and 102. On the other hand, as shown in FIG. 18, the rotation center mechanism 105 is installed on the first pier 104. FIG. 18B is an enlarged cross-sectional view of part b of FIG.
The central portion of the bridge girder member 106 on the first pier side is placed on the rotation center mechanism 105. On the other hand, a carriage 107 is movably installed on the linear track 103, and a crawler plate 108 that is rotatable with respect to the carriage 107 is installed on the carriage 107 as shown in FIG. The second pier side of the bridge girder member 106 is placed on the crawler plate 108.
Then, by moving the carriage 107 from the state indicated by the solid line in FIG. 17 to the state indicated by the two-dot chain line, the bridge girder member 106 is rotated about the rotation center mechanism 105. At this time, the bridge girder member 106 is moved on the crawler plate 108 on the carriage 107 so that the bridge girder member 106 can be rotated using a linear track. In FIG. Move / rotate from the position indicated by the solid line to the position indicated by the two-dot chain line.

JP, 2007-138514, A FIG. 1, FIG. 2, FIG. 5, FIG.

However, the conventional technique has the following problems.
That is, in the technique of Patent Document 1, since the center position on the first pier side of the bridge girder member is supported by the rotation center mechanism 105, one point is obtained when the bridge girder member 106 is a wide one having a plurality of main girders. Since it becomes support, there existed a problem that the balance by the side of the 1st pier of the bridge girder member 106 became unstable.
In particular, in the technique of Patent Document 1, the rotation center mechanism 105 receives a horizontal force generated along with the rotation of the bridge girder member 106 and a vertical force that supports the weight of the bridge girder member 106 at a single point support. Since the balance between the horizontal force and the vertical force must be taken at the same time, there is a problem that the balance on the first pier side of the bridge girder member 106 becomes more unstable.

  An object of the present invention is to solve the above problems and to provide a bridge girder feeding method capable of rotating a wide bridge girder having a plurality of main girders with a stable balance using a linear track. .

The bridge girder delivery method according to the present invention has the following configuration.
(1) A bridge girder delivery method that runs from a first pier to a second pier by running a delivery carriage on which a bridge girder is placed, wherein the bridge girder member is a wide bridge girder having a plurality of main girders. The rotation center shaft mechanism installed on the first pier supports one of the main girders, and uses the straight track installed on the second pier, and the first pier side of the bridge girder member And a pivoting step of pivoting the bridge girder member about the rotation center shaft mechanism as a fulcrum by moving both the main girders. The present invention is effective as a solution when the bridge girder has a curved portion or when the ground yard cannot be secured on the extension of the bridge position.
(2) In the bridge girder delivery method described in (1), the rotation center shaft mechanism includes a horizontal force receiving means for receiving a horizontal force in the turning step, and the horizontal force receiving means for supporting the weight of the pier member. Has a separate vertical force receiving means.

(3) In the bridge girder delivery method described in (1) or (2), in the rotation step, the other of the main girders is moved using a straight rail installed on the first pier. And
(4) In the bridge girder feeding method described in (3), the stroke error of a horizontal jack used when moving the other of the main girders is adjusted by a relief valve of a hydraulic pump.

Next, the operation and effect of the bridge girder delivery method having the above configuration will be described.
(1) A bridge girder delivery method that runs from a first pier to a second pier by running a delivery carriage on which a bridge girder is placed, wherein the bridge girder member is a wide bridge girder having a plurality of main girders. The rotation center shaft mechanism installed on the first pier supports one of the main girders, and uses the straight track installed on the second pier, and the first pier side of the bridge girder member In the case where the bridge girder member has a curved portion, or the step of rotating the bridge girder member with the rotation center shaft mechanism as a fulcrum by moving the plurality of main girders, or When the ground yard cannot be secured on the extension of the bridge position, the bridge girder member is rotated around the main girder on the first pier side of the bridge girder member. It can be rotated.
(2) In the bridge girder delivery method described in (1), the rotation center shaft mechanism includes a horizontal force receiving means for receiving a horizontal force in the turning step, and the horizontal force receiving means for supporting the weight of the pier member. Has a separate vertical force receiving means, so that the rotation center shaft mechanism serving as the center of rotation separates the horizontal force generated in the rotation process and the vertical force that supports the weight of the bridge girder member. Since it can support, compared with the single point support of patent document 1, a bridge girder member can be rotated with the stable balance.

(3) In the bridge girder delivery method described in (1) or (2), in the turning step, the other of the main girders is moved using a straight track installed on the first pier. Therefore, since the first pier side of the bridge girder member can be supported at a plurality of points, the bridge girder member can be rotated with a stable balance. In particular, when one of the main beams is supported by the rotation center shaft mechanism, the other of the main beams needs to move. At this time, since the other necessary movement of the main girder is performed using the linear rail, the bridge girder member can be rotated with a stable balance even with respect to the wide girder member.
(4) In the bridge girder feeding method described in (3), the adjustment of the stroke error of the horizontal jack used when moving the other of the main girders is performed by the relief valve of the hydraulic pump. Even if the main girder on the first pier side needs to be moved unexpectedly when the bridge girder is moved largely on the second pier side, the relief valve can escape, so a wide bridge girder The bridge girder member can be rotated with a stable balance with respect to the member.

It is a 1st process drawing which shows the process of a bridge girder delivery method. It is a 2nd process figure which shows the process of a bridge girder delivery method. It is a 3rd process figure which shows the process of a bridge girder delivery method. It is a 4th process figure which shows the process of a bridge girder delivery method. It is a top view in the state of FIG. It is a top view in the state of FIG. It is the figure which looked at the rotation apparatus installed on the pier P1 from the front direction. FIG. 8 is a plan view of FIG. 7. It is the figure which looked at the rotation apparatus installed on the pier P1 after completion | finish of a rotation process from the front direction. FIG. 10 is a plan view of FIG. 9. It is the figure which looked at the rotation apparatus installed on the pier P2 from the front direction. 3 is a central sectional view of the turntable 31. FIG. FIG. 4 is a layout view of a vertical jack 314. It is an enlarged view of the rail part for horizontal jacks in FIG. It is a side view of FIG. It is the X section enlarged view of FIG. It is a top view of the conventional bridge girder member rotation. It is a figure which shows the structure of the conventional rotation center. It is a figure which shows the structure of the conventional mobile trolley | bogie.

A bridge girder delivery method according to an embodiment of the present invention will be described in detail with reference to the drawings. 1 to 4 show the steps of the bridge girder delivery method. FIG. 1 shows a state before the bridge girder member H is sent out.
As shown in the figure, P1, P2, P3, P4, P5, and P6 are constructed from the left side of the pier. The first pier in the claims corresponds to the pier P2, and the second pier in the claims corresponds to the pier P1. At the midpoint of the pier P, a bent leg B, which is a temporary assembly leg and is removed after completion, is assembled. As shown, the vent B is assembled with vents B1, B2, B3, B4, B5, and B6 from the left.
An elevated girder D1 has already been installed in the left direction of the pier P1. Further, an elevated girder D2 has been installed between the piers P2, P3, P4, and P5. The elevated beam D2 is supported not only by the piers P2, P3, P4, P5, and P6 but also by the vents B1, B2, B3, B4, B5, and B6.

On the elevated beam D2, the delivery-side linear track 11 is supported by a plurality of support bases 12. A self-propelled front carriage 13 and a rear carriage 14 are movably installed on the delivery-side straight track 11.
A bridge girder member H is placed on the front carriage 13 and the rear carriage 14. On the front side of the bridge girder member H, the hand extender T is connected. Further, a rear work girder U is connected to the rear side of the bridge girder member H.
By driving the self-propelled forward carriage 13, the bridge girder member H is moved to the vicinity of the bridge girder P2. The rear carriage 14 moves on the delivery-side straight track 11 as the bridge girder member H moves. As a result of this movement, the leading end of the hand extender T reaches the vent B1. A roller is provided on the vent B1, and the hand extender T is placed on the roller. Further, a jack is provided on the vent B2, and the bridge girder member H is supported by the vent B1, the vent B2, and the rear carriage 14. In this state, the front carriage 13 moves backward about 10 m and supports the bridge girder member H by lowering the jack on the vent B2. And it self-travels again and sends the bridge girder member H ahead. By repeating this operation, the bridge girder member H can be sent out.
And the bridge girder member H, the hand extension machine T, and the rear construction girder U are sent out to the position shown in FIG.

Next, the first digit lowering operation is performed. The bridge girder member H, the hand extender T, and the rear construction girder U are lowered using the hydraulic jacks disposed on the upper surfaces of the vent B1 and the vent B2. The lowered state is shown in FIG. FIG. 5 shows a plan view in the state of FIG. The bridge girder member H is a wide bridge girder having main girders HA and HB on both sides, and has a curved portion having a gentle curve. The front part of the bridge girder H is located on the pier P1 which is the 2nd pier of a claim, and the rear part of the bridge girder H is located on the pier P2 which is the 1st pier of a claim. In the present embodiment, the bridge girder member H is rotated clockwise in order to move the bridge girder member H from the state of FIG. 5 to the state of FIG.
Next, a device for rotating the bridge girder member H and its operation will be described.
FIG. 7 shows a view (a cross-sectional view taken along line AA in FIG. 5) of the rotating device installed on the pier P1 as viewed from the front. FIG. 8 shows an enlarged view of a portion B in FIG. A straight track 21 is disposed on the bridge pier P <b> 1 by a plurality of support bases 24. On the straight track 21, four moving carriages 23 are held so as to be movable along the straight track 21.
As shown in FIG. 8, the bridge beam member H has main beams HA and HB on both sides, and the main beam HA and the main beam HB are connected by an intermediate material HC. The main girder HA is constituted by connecting a pair of main girder constituting digits HA1 and main girder constituting digits HA2 by a connecting material HAC. The main girder HB includes a pair of main girder constituting digits HB1 and main girder constituting digits HB2 connected by a connecting material HBC.

The moving carriage 23 uses a 200 TON magic slide manufactured by Otsuki Jack Co., Ltd. Since the basic structure of the product is the same as the structure of the carriage 107 having the crawler plate 108 of Patent Document 1 in FIG. 19, a detailed description thereof will be omitted. The crawler plate 108 is rotatably arranged with respect to the carriage 107, and the loaded heavy object can move on the crawler plate 108 while changing its direction. Among the four moving carriages 23, the two crawler plates 108 on the left side in the figure each have a pair of main girder constituting digits HA1 and HA2 constituting the first main girder HA of the bridge girder member H. Is placed. A horizontal jack 22 is attached to the movable carriage 23 on which the main girder constituting beam HA2 is placed. The horizontal jack 22 has a rod end coupled to a moving carriage 23, and a rear end of the cylinder is detachably attached to the linear track 21.
A pair of main girder constituting beams HB1 and HB2 constituting the second main girder HB of the bridge girder member H are mounted on the remaining two crawler plates 108, respectively. A horizontal jack 22 is attached to the movable carriage 23 on which the main girder constituting beam HB2 is placed.

On the other hand, in FIG. 11, the figure which looked at the rotation apparatus installed on the pier P2 from the front direction is shown. A turntable 31 (corresponding to the central axis mechanism of claim 1) is arranged on the bridge pier P2 via a turntable 37. The turntable 31 is provided behind the main girder HA of the bridge girder member H. The end is placed. On the other hand, a pair of horizontal jack rails 35 are disposed on the bridge pier P2 via a gantry 32. The horizontal jack rail 35 is connected to a bridge girder member via a gantry 34 and a plurality of vertical jacks 36. The rear end of the H main beam HB is placed.
Next, the structure of the turntable 31 will be described. FIG. 12 shows a central sectional view of the turntable 31. FIG. 13 shows the arrangement of the slide jack 314 with a Teflon (registered trademark) plate attached to the bottom, as seen from the direction of arrow C in FIG. Four slide jacks 314 are arranged between two square bases 312 and 313 formed by connecting two square plates. A central hole is formed at the center of the square bases 312 and 313, and a central shaft 311 is fitted therein. The central shaft 311 is an S45CN material having a diameter of 150 mm, passes through the square bases 312 and 313, and places the central point of the main beam HB on a flat surface at the upper end.

In the turntable 31, the weight of the bridge girder member H is supported by four slide jacks 314. On the other hand, the horizontal force that is received when the bridge girder member H is rotated is received by the rotating shafts installed in the center holes of the two square stands 312 and 313.
In this way, the vertical force due to its own weight transmitted from the bridge girder member H is supported by the slide jack 314 having the Teflon (registered trademark) plate on the four bottoms, and the horizontal force accompanying the rotation is received by the square bases 312 and 313. Therefore, as compared with the one-point support in Patent Document 1, the bridge girder member can be rotated with a stable balance. That is, a large horizontal force acts on the central shaft 311 by the rotating operation, but the horizontal force is received by the square plate 312 and the square plate 313, and therefore, four slide jacks supporting the vertical force. 314 is less affected. Further, even if the supporting force of the bridge girder member H changes due to the rotation operation, the balance is not lost because the weight of the bridge girder member H is supported by the four slide jacks 314.

Next, the structure of the rail for horizontal jack will be described. In FIG. 14, the enlarged view of the rail part for horizontal jacks in FIG. 11 is shown. FIG. 15 shows a side view of FIG. FIG. 16 is an enlarged view of a portion X in FIG.
A pair of straight rails 35 are disposed on the gantry 32. On the upper surface of the straight rail 35, a slide jack 335 having a Teflon (registered trademark) plate 333 at the bottom is placed through the mounting plate 332. Guides 334 are fixed to both ends of the lower surface of the mounting plate 332 with the straight rail 35 interposed therebetween. The clearance between the straight rail 35 and the guide 334 is 50 mm on each side. A bracket 331 is attached to the upper surface of the mounting plate 332, and the gantry 34 is fixed to the upper surface of the bracket 331. A rear end portion of the main girder HB of the bridge girder member H is placed on the upper surface of the gantry 34 via two slide jacks 36. As shown in FIG. 15, the rod tip 38 a of the horizontal jack 38 is connected to the bracket 331. A cylinder rear end 38 b of the horizontal jack 38 is fixed to the straight rail 35.

Next, the operation of the turning device for the bridge girder member H having the above configuration will be described.
The bridge girder member H is disposed at the position shown in FIGS. 5 and 8 on the pier P1. Moreover, on the bridge pier P2, it has arrange | positioned in the position shown in FIG.
In FIG. 8, the cylinder rear end portion of the horizontal jack 22 is fixed to the linear track 21, and the horizontal jack 22 is hydraulically driven. When the horizontal jack 22 is driven, the moving carriage 23 on which the main girder constituting beam HA2 is placed and the moving carriage 23 on which the main girder constituting beam HB2 is placed are moved to the left in the figure by the stroke of the horizontal jack 22. Moving. Accordingly, the remaining two moving carriages 23 are also moved, so that the main girders HA and HB of the bridge girder member H are simultaneously moved leftward by the stroke of the horizontal jack 22.
On the other hand, since the rear end portion of the main beam HA is placed on the turntable 31 on the pier P2, the main beam HA is only rotated about the central axis 311 of the turntable 31. is there.
On the pier P1, when the main girders HA1 and HA2 are moved in the left direction, the main girders HA1 and HA2 are moved forward on the respective crawler plates with respect to the movable carriage 23 on which each is placed. Moving.

The front end portion of the main girder HB on the other side moves on the bridge pier P1 so that the entire bridge girder member H rotates about the central axis 311. That is, the main girders HB1 and HB2 move in the left direction, and the main girders HB1 and HB2 move in the forward direction on the respective crawler plates with respect to the movable carriage 23 on which the main girders HB1 and HB2 are placed.
On the other hand, the rear end of the main beam HB moves around the central axis 311 on the pier P2. That is, a relief valve (not shown) is attached to the hydraulic pressure supply portion of the horizontal jack 38, and when the excessive hydraulic pressure is applied to the horizontal jack 38, the hydraulic pressure is released.
In normal operation, hydraulic pressure is supplied to the horizontal jack 38, and the mounting plate 332 can move by sliding on the Teflon (registered trademark) plate 333, and thus moves along the straight rail 35. At this time, due to the rotating action, the mounting plate 332 acts on the straight rail 35 in a direction away from the axis. In this case, the guide plate 332 moves along the straight rail 35 while moving within a margin range of the guide 334 of the mounting plate 332, that is, a range of 50 mm on each side.

  When one driving by the horizontal jack 22 is completed on the pier P1, the cylinder rear end of the horizontal jack 22 is removed from the linear track 21. Then, the cylinder hydraulic pressure supply direction is switched, the rod is accommodated in the cylinder, and the cylinder rear end portion of the horizontal jack 22 is fixed to another position of the linear track 21 again. Then, the hydraulic drive is performed again. By repeating this operation, the bridge beam member H (main beams HA1, HA2, HB1, HB2) is moved to the position shown in FIG. A plan view of FIG. 9 is shown in FIG. 6, 9, and 10 show a state where the bridge beam member H has finished rotating.

The moving distance of the main beam HA and the main beam HB on the pier P1 can be calculated almost accurately by the design value, but the moving distance of the rear end portion of the main beam HB on the pier P2 can be calculated accurately. difficult. It is also necessary to absorb the madness somewhere. In the present embodiment, since the relief valve is connected to the horizontal jack 38, when a force outside the calculation is applied to the bridge girder member H, the horizontal jack 38 follows the movement of the bridge girder member H, so that the bridge girder member is smooth. Can be rotated.
Next, as shown in FIG. 4, the bridge girder member H which is rotated and is in a normal position is lowered by the vertical jacks arranged in the vents B1 and B2, and is connected to the already installed elevated girders D1 and D2. . Thereby, the delivery method of the bridge girder member H is completed.

  As described above in detail, according to the bridge girder delivery method of the present embodiment, the first pier P2 to the second pier P1 are caused by running the front carriage 13 and the rear carriage 14 on which the bridge girder member H is placed. The bridge girder delivery method is a wide girder having main girder HA, HB on both sides, having a curved portion, and the turntable 31 installed on the first pier P2. The bridge girder member H is supported by moving the main girder HA, HB on the first pier P2 side of the bridge girder H using the linear track 21 installed on the second pier P1 while supporting one HA of the main girder. Is provided with a turning step of turning the turntable 31 as a fulcrum, so that the bridge girder member H is turned around the main girder HA on the first pier P2 side of the bridge girder member H. Bridge girder member H with a stable balance It can be dynamic.

  Further, the turntable 31 is separate from the square stands 312 and 313 that are horizontal force receiving means for receiving a horizontal force in the rotation process, and the square stands 312 and 313 that are horizontal force receiving means for supporting the weight of the pier member H. 4 vertical jacks 314, which are vertical force receiving means, and the rotating table 31 serving as the center of rotation is a vertical force that supports the horizontal force generated in the rotating process and the weight of the bridge girder member H. Since the force can be supported separately, the bridge girder member H can be rotated with a stable balance as compared with the one-point support in Patent Document 1.

Moreover, since the other HB of the main girder is moved using the linear rail 35 installed on the 1st pier P2 in a rotation process, it is two points on the 1st pier P2 side of the bridge girder member H. Therefore, the bridge girder member H can be rotated with a stable balance. In particular, when one HA of the main beam is supported by the turntable 31, the other HB of the main beam needs to move. At this time, since the necessary movement of the other HB of the main girder is performed using the straight rail 35, the bridge girder member H can be rotated with a stable balance even with respect to the wide girder member H. .
Further, since the adjustment of the stroke error of the horizontal jack 38 used when moving the other HB of the main girder is performed by the relief valve of the hydraulic pump, the bridge girder member H is largely moved on the second pier P1 side. Even when the other HB of the main girder on the side of the first pier P2 needs to be moved unexpectedly, the relief valve can escape, so it is stable against the wide bridge girder member H. The bridge girder member H can be rotated with the balance achieved.

As mentioned above, although the Example was shown about the delivery method of the bridge girder member which concerns on this invention, this invention is not limited to this Example, A various change is possible in the range which does not deviate from the meaning.
For example, in the present embodiment, the wide bridge girder member H having the main girders HA and HB on both sides has been described, but the same applies to the case where the width is wider and there are three or more main girders.
In the present embodiment, the case where the bridge girder member has a curved portion has been described. However, even when the bridge girder member does not have the curved portion, the ground yard cannot be secured on the extension of the bridge position. Can achieve the same effect.

H Bridge girder member HA, HB Main girder T Hand extender U Rear construction girder P Bridge pier B Bent 21 Straight track 22, 38 Horizontal jack 23 Moving carriage 31 Revolving stand 311 Revolving shaft 35 Straight rail

Claims (4)

In the bridge girder delivery method that spans from the first pier to the second pier by running the delivery carriage on which the bridge girder is placed,
The bridge girder member is a wide bridge girder having a plurality of main girders,
The rotation center shaft mechanism installed on the first pier supports one of the main girders and uses the straight track installed on the second pier, the plurality of the plurality of bridge pier members on the first pier side. A bridge girder feeding method characterized by having a turning step of turning the bridge girder member about the rotation center shaft mechanism as a fulcrum by moving the main girder. In the bridge girder delivery method according to claim 1,
The rotation center shaft mechanism includes a horizontal force receiving means for receiving a horizontal force in the rotating step, and a vertical force receiving means separate from the horizontal force receiving means for supporting the weight of the pier member. Bridge girder delivery method. In the bridge girder delivery method according to claim 1 or claim 2,
In the turning step, a bridge girder feeding method characterized by moving the other of the main girders using a straight rail installed on the first pier. In the bridge girder delivery method according to claim 3,
A bridge girder feeding method characterized by adjusting a stroke error of a horizontal jack used when moving the other of the main girders by a relief valve of a hydraulic pump.

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