JP2006077521A - Bridge constructing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bridge constructing apparatus which can construct a corrugated steel web prestressed concrete bridge having a wide width and driven with a heavy weight, according to a cantilever method, and further can construct a cable-stayed bridge which employs a steel member as a main girder joint portion, having a heavy weight at a joint portion block, and also employs the steel member as a transverse girder, to thereby have a further increased weight. <P>SOLUTION: The bridge constructing apparatus is formed of a hung-type movable work vehicle 2 having base frames 21 and overhanging frames 23, and a support-type movable work vehicle 3 having suspension frames 33 and support frames 34. Each base frame 21 is mounted on an upper surface of an upper girder 11 constituting a girder 1 arranged on bridge piers, in a manner reciprocating in a bridge axial direction, and provided with a fixing device for being fixed to the upper girder 11. Each overhanging frame 23 extends from the base frame 21 so as to overhang above the front of the base frame 21, and exhibits a portal shape with its lower ends opened, as viewed in a front elevation. The overhanging frame 23 has arranged thereon suspension devices for suspending and supporting corrugated web members and forms. Each suspension frame 33 is suspended from a lower surface of a lower girder 12 constituting the girder 1 in a manner reciprocating in the bridge axial direction. Each support frame 34 is arranged in front of the suspension frame 33 and extends in a direction perpendicular to a bridge axis. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a bridge construction apparatus for corrugated steel web prestressed concrete bridges.

  Conventionally, in a prestressed concrete box girder bridge, a corrugated steel web prestressed concrete bridge using a corrugated steel web instead of a concrete web is known.

  This corrugated steel web prestressed concrete bridge replaces the web with a light corrugated steel sheet, greatly reduces its own weight, supports longer spans, and streamlines construction and shortens construction time. Furthermore, there is an advantage that a high shear buckling strength can be obtained without an auxiliary material by corrugation.

  A cantilever erection method is known as one of bridge construction means for such a corrugated steel web prestressed concrete bridge.

This cantilever erection method is presented in Japanese Patent Laid-Open Nos. 2001-020227, 2002-021024, 2003-166215, 2003-193430, 2003-301415, and the like. And
In these cantilever erection methods, as shown in FIGS. 14 and 15, the upper surface of the upper girder 11 of the girder 1 provided on the bridge pier (not shown) has a predetermined interval and is installed in the bridge axis direction. A frame-like base frame 21 in which a fixing device 212 is disposed below a rear portion having moving rollers 211 and 211 that are movably fitted to a pair of rails 113 and 113, and a front portion of the base frame 21. Suspension type moving work provided with an overhanging frame 22 provided with a hanging member 221 for hanging and supporting a corrugated steel sheet web member W, a formwork M, etc., in a front gate shape that is extended and continuously opened and opened downward. Car 2 is used.

  That is, in the mobile work vehicle 2 placed and fixed on the bridge pier, the assembly of the formwork, the placement of the reinforcing bars and the prestressed concrete steel bar, the placement of the concrete, and the introduction of the prestress after curing are carried out integrally. The cycle is sequentially constructed by a so-called cantilever construction method in which the movable work vehicle 2 is advanced by the drive device 213 and the girders 11 are projected. As shown in FIG. 13, for example, a plurality of corrugated steel sheet web members W appropriately divided in the vertical direction according to the formwork M are traveled on the main frame 23 extending in the bridge axis direction provided in the portal-type projecting frame 22. The corrugated steel sheet web part conveying device 231 suspended as possible is sequentially conveyed to the arrangement position and fixedly connected to the upper frame M1 and the lower frame M2 of the formwork M, and the concrete is cast and the girder H is sequentially extended. Is.

  This cantilever construction method is most suitable for the construction of mountain valleys, high-flow rivers, and long span bridges on the sea where ships are navigating. Zhang Bridge) and arch bridge construction.

  However, in the cantilever erection method using the conventional mobile work vehicle 2, for example, when a wide bridge having a bridge width exceeding 40 m is constructed, the driving weight is large, and the worker is required to work. The support load (fulcrum reaction force) of the mobile work vehicle 2 becomes large because a wide range of scaffolding is required, and it may be difficult to support it with the overhanging frame 22.

In particular, in the case of an extra bridge (cable stayed bridge), the diagonal member (cable), the joint part of the main girder is a steel member and the joint block is heavy, and the cross girder is also a steel member. Will increase.
JP 2001-020227 A JP 2002-021024 JP 2003-166215 A JP 2003-193430 A JP 2003-301415 A

  The problem to be solved by the present invention is that when a corrugated steel web prestressed concrete bridge with a wide bridge width is constructed by a cantilever erection method, the placement weight of one block is large, and the suspension type mobile work vehicle is supported. The load (fulcrum reaction force) becomes large, and it is difficult to place concrete while holding the web, formwork, many scaffolds and workers with the overhanging frame.

  In order to solve the above-mentioned problem, a bridge construction device according to the present invention is a frame in which an upper girder constituting a girder provided on a bridge pier is mounted so as to be able to reciprocate in the direction of the bridge axis, and a fixing device is disposed below the rear part. And a hanging frame for hanging and supporting a corrugated steel web member, a formwork, etc. in a front gate shape that is extended and connected to the upper part of the front part of the base frame and opened downward. A suspension-type mobile work vehicle including a suspension frame, and a suspension frame that extends in a bridge axis direction that is suspended so as to reciprocate in a bridge axis direction on a lower surface of a lower girder constituting the girder in a direction perpendicular to the bridge axis. And a support-type mobile work vehicle having an extended support frame.

  In addition, an extension frame of the suspension type mobile work vehicle and a support frame of the support type mobile work vehicle are detachably connected, and the suspension type mobile work vehicle and the support type mobile work vehicle are integrated with each other as a bridge. It is good to be able to move forward in the axial direction.

  Furthermore, it is preferable that the position where the load of the suspension type mobile work vehicle is applied to the beam and the position where the load of the support type mobile work vehicle is applied are arranged at a predetermined interval in the direction perpendicular to the bridge axis.

  By using a suspension-type mobile work vehicle and a support-type mobile work vehicle together, it is possible to construct a corrugated steel web prestressed concrete bridge with a wide and heavy casting weight by the overhang construction method. It is possible to construct an extra bridge (cable stayed bridge) which is a steel member and has a large joint block weight, and the cross beam is also a steel member, and the weight further increases. In addition, an extension frame of the suspension type mobile work vehicle and a support frame of the support type mobile work vehicle are detachably connected, and the suspension type mobile work vehicle and the support type mobile work vehicle are integrated with each other as a bridge. If it is possible to move forward in the axial direction, the suspended mobile work vehicle and the support-type mobile work vehicle can be moved together, so there is no need to align the two during movement. Both of them can be moved by one of the driving devices. It should be noted that if the suspension-type mobile work vehicle and the support-type mobile work vehicle are individually movable, there is an advantage that fine adjustment of the formwork position and the like is possible. Furthermore, the position where the load of the suspension type mobile work vehicle in the girder and the position where the load of the support type mobile work vehicle is applied are installed at a predetermined interval in the direction perpendicular to the bridge axis, The load applied to the girder by each mobile work vehicle is averaged to prevent a part of the load from being applied.

  Next, the best mode for carrying out the present invention will be described.

  1 to 6 show a preferred embodiment of the present invention, and a bridge construction apparatus according to the present invention mainly includes an upper surface 111 of an upper girder 11 constituting a girder 1 provided on a pier (not shown). The suspension type mobile work vehicle 2 disposed on the lower part of the lower girder 12 and the support type mobile work vehicle 3 disposed on the lower surface 121 of the lower girder 12.

  The suspended mobile work vehicle 2 has two pairs of rails 113 installed in the bridge axis direction with a predetermined interval on the upper surface 111 of the upper girder 11 of the girder 1 provided on the bridge pier (not shown). , 113 and 113, 113 are arranged so as to be able to travel, and are composed of two work vehicles 2A, 2B arranged in parallel in a direction perpendicular to the bridge axis.

  The two work vehicles 2A and 2B are symmetrical and have the same shape, and travel on a pair of rails 113 and 113 installed in the bridge axis direction at a predetermined interval on the upper surface 111 of the upper girder 11 in the girder 1, respectively. A frame-like base portion in which a fixing device 212 for preventing a fall at the time of movement and a fixing device 213 for preventing a fall at the time of driving work are arranged below the rear portion having movable rollers 211 and 211 that can be fitted. It has a frame 21 and a front gate-shaped projecting frame 22 that projects from the upper part of the front part of the base frame 21 and is continuously connected to the lower part.

  A suspension frame 232 extending in a direction perpendicular to the bridge axis is suspended from the support frame 231 extending in the bridge axis direction so as to reciprocate in the bridge axis direction over the base frame 21 and the overhanging frame 22 of the work vehicles 2A and 2B. In addition, the corrugated steel sheet web member W (the left divided body W1, the central divided body W2, and the right divided body W3) is suspended from the suspension frame 232, respectively.

  On the other hand, the support type mobile work vehicle 3 has a protruding end from the lower surface 121 of the lower girder 12 of the lower girder 12 that is penetrated and fixed to the front / rear / right / left positions as seen from at least the plane of the girder protruding end portion of the girder 1 A pair of base frames 33, 33 extending in the direction of the bridge axis suspended so as to be movable in the direction of the bridge axis by suspension vehicles 32,. The main part is constituted by the support frames 34 and 34 having a predetermined width.

  The suspension frames 33 and 33 and the support frames 34 and 34 of the mobile work vehicle 3 are provided with a large number of scaffolds 4 over almost the entire surface, so that the worker can support the suspension-type mobile work vehicle 2 and the support-type movement. It is possible to go back and forth between the work vehicle 3 using the stairs 41 erected between the two.

  2 and 3, the position of each rail 113 to which the load of the suspended mobile work vehicle 2 is applied in the girder 1, that is, the position to which the load of the suspended mobile work vehicle 2 is applied (shown in the drawings). AA line) and the position of each wage anchor 31 that is the suspension position of the support type mobile work vehicle 3, that is, the position to which the load of the support type mobile work vehicle 3 is applied (BB line shown in the figure). Are installed at a predetermined interval in the direction perpendicular to the bridge axis without being coincident or close to each other, that is, the position where the load of the suspension type mobile work vehicle 2 is applied to the girder 1 and the support type movement Since the position of the work vehicle 3 to which the load is applied is installed at a predetermined interval in the direction perpendicular to the bridge axis, the load applied to the beam 1 by each mobile work vehicle 2, 3 is averaged and Deformation or breakage caused by burden on parts The to prevent.

  In addition, as shown in FIG. 7A, the bridge axis direction tip of the overhanging frame 22 of the suspension type mobile work vehicle 2 and the bridge axis direction tip of the support frame 34 of the support type mobile work vehicle 3 are: It can be lifted by a suspension column jack 51 installed on the overhanging frame 22 and is connected to a support frame 34 arranged at the lower end by a suspension column 52 that can be connected and disconnected.

  More specifically, as shown in FIG. 7 (b), the suspension column 52 is formed at a connecting portion 53 formed below, and the overhang frame 22 of the suspension type mobile work vehicle 2 and the support frame of the support type mobile work vehicle 3. 34 is connected or disconnected.

  In particular, in this embodiment, as shown in FIG. 7B, the pin hole 521 formed in the suspension column 52 communicates with the fitting cylinder 541 installed upright on the fixing member 54 installed on the support frame 34 side. The detachable pin 523 is fitted and connected to the pin holes 542 and 542 formed in this manner, and the detachable pin 523 can be easily inserted and removed by making the pin hole 521 a long hole. Is increasing.

  As described above, the suspension type mobile work vehicle 2 and the support type by the suspension column 52 are formed by inserting / removing the detachable pin 523 and the vertical movement of the suspension column jack 51 installed on the extension frame 22 of the suspension type mobile work vehicle 2. The mobile work vehicle 3 is connected and disconnected, and the suspension column jack 51 has a stroke that is greater than the total deflection of the suspension-type mobile work vehicle 2 and the support-type mobile work vehicle 3. Therefore, when the suspension-type mobile work vehicle 2 and the support-type mobile work vehicle 3 are connected to each other by the suspension column 52 and moved together, the stroke of the suspension column jack 51 is adjusted to increase the length of the suspension column 52. By adjusting, the suspended mobile work vehicle 2 and the support-type mobile work vehicle 3 can be moved together, and the load is reliably prevented from being unbalanced during the movement.

  FIGS. 8 to 13 show the procedure of the erection work according to the present embodiment. As shown in FIG. 8, the suspended mobile work vehicle 2 is advanced to a predetermined position along the traveling rail 113. At this time, since the suspension type mobile work vehicle 2 and the support type mobile work vehicle 3 are connected by the suspension pillar 52, the support type mobile work vehicle 3 is also moved together only by moving to the predetermined position. Therefore, the support-type mobile work vehicle 3 does not need to be aligned and complicated control is not required, and both of them can be moved together by driving one of them. At this time, the carry-in device 24 for the corrugated steel web member (not shown) is located at the end.

  Next, as shown in FIG. 9, the corrugated steel web member W ( The left divided body W1, the central divided body W2, and the right divided body W3) are lifted. Further, the connection between the lower end of the suspension column 52 and the support type mobile work vehicle 3 is released, and the suspension column 52 is lifted by the jack 51.

  Further, as shown in FIG. 10, the corrugated steel sheet web member W (the left divided body W <b> 1, the central divided body W <b> 2, and the right divided body W <b> 3) is conveyed to a predetermined position in front by the carry-in device 24.

  Then, as shown in FIG. 11, the lower mold frame M and the lower mold frame support beam 7 (horizontal beam, vertical beam) are set in the same manner as in the conventional suspended mobile work vehicle 2. At this time, since the connection between the suspension type mobile work vehicle 2 and the support type mobile work vehicle 3 by the suspension pillar 52 is released, the suspension type mobile work vehicle 2 and the support type mobile work vehicle 3 are individually connected. It can be moved, and for example, it can be appropriately moved according to the individual purpose of use of the suspension type mobile work vehicle 2 or the support type mobile work vehicle 3 such as fine adjustment of the position of the formwork.

  Next, the placing work is performed as shown in FIG. 12, and then the lower mold frame M and the lower mold support beam 7 are removed and lowered onto the support type moving work vehicle 3, and as shown in FIG. Thus, the suspension column 52 is lowered by the jack 51 to connect the lower end of the suspension column 52 and the support type mobile work vehicle 3, and the suspension type mobile work vehicle 2 is connected to the support type mobile work vehicle 3. Are integrally moved forward to return to the initial state shown in FIG. 7, and this process is sequentially repeated to perform the installation work.

The side view which shows preferable embodiment of this invention. The top view of embodiment shown in FIG. The front view of embodiment shown in FIG. Sectional drawing which follows the IV-IV line | wire of FIG. Sectional drawing which follows the VV line | wire of FIG. The top view which shows the support type | mold mobile work vehicle in embodiment shown in FIG. Explanatory drawing which shows the suspension pole part of embodiment shown in FIG. Explanatory drawing which shows the use condition of embodiment shown in FIG. Explanatory drawing which shows the use condition of embodiment shown in FIG. Explanatory drawing which shows the use condition of embodiment shown in FIG. Explanatory drawing which shows the use condition of embodiment shown in FIG. Explanatory drawing which shows the use condition of embodiment shown in FIG. Explanatory drawing which shows the use condition of embodiment shown in FIG. The side view which shows a prior art example. The front view which shows a prior art example.

Explanation of symbols

1 digit, 2 suspension-type mobile work vehicle, 3 support-type mobile work vehicle, 11 upper girder, 12 lower girder, 21 base frame, 23 overhang frame, 24 suspension member, 33 suspension frame, 34 support frame

Claims (3)

  A frame-like base frame which is mounted on the upper surface of the upper girder constituting the girder provided on the pier so as to be able to reciprocate in the direction of the bridge axis and which has a fixing device for the upper girder, and the front of the base frame A suspension-type mobile work vehicle including a projecting frame in which a suspension device for hanging and supporting a corrugated steel sheet web member, a formwork, etc. is suspended in a front gate shape that projects continuously upward and is opened downward. A support-type mobile work vehicle having a support frame extending in a direction perpendicular to the bridge axis in front of a suspension frame extending in the bridge axis direction that is suspended so as to reciprocate in the bridge axis direction on the lower surface of the lower girder constituting the girder; A bridge construction apparatus characterized by comprising:   The projecting frame of the suspension type mobile work vehicle and the support frame of the support type mobile work vehicle are detachably connected, and the suspension type mobile work vehicle and the support type mobile work vehicle are integrated in the direction of the bridge axis. The bridge construction device according to claim 1, which is movable forward. The position where the load of the suspension type mobile work vehicle in the girder is applied and the position where the load of the support type mobile work vehicle is applied have a predetermined distance from each other in the direction perpendicular to the bridge axis. Bridge construction device.

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