JP2014047525A - Method for erecting bridge between building ridges - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for erecting a bridge between building ridges, capable of efficiently performing an erection work while easily securing a work space of a building ridge on the side of delivering of the bridge, and capable of easily securing a preparation space for arranging a crane.SOLUTION: A bridge 12 is arranged on a first building ridge 102, and the bridge 12 is delivered to the side of a second building ridge 104 adjacent to the building ridge 102 while the bridge 12 is cantilever-supported, thus erecting the bridge 12 between the building ridges 102, 104. The bridge 12 is divided into a plurality of blocks in a delivery direction, a block being a leading end in the delivery direction is lifted and connected to a front launching machine 18 arranged on the building ridge 102 in advance, and the other blocks are lifted in order from the leading end side to connect the blocks to each other while making the leading end block move along with the front launching machine 18 in the delivery direction, thereby assembling the bridge 12 while keeping the front launching machine 18 floating at a position between the building ridges 102, 104.

Description

  The present invention relates to an inter-building bridge construction method for bridging a bridge girder between buildings in a plant such as a power plant, and more particularly to efficiently construct a bridge even in a work space limited by the existing equipment layout in the plant. It is related with the technology which performs

  Some thermal power plants use coal as a fuel by pulverizing coal into pulverized coal. In such a thermal power plant, coal is stored in a bunker and supplied to a conveying means such as a belt conveyor at a certain rate and conveyed, and the conveyed coal is pulverized into pulverized coal by a pulverizer. The pulverized coal is burned in a boiler facility, and the water is heated by this combustion to generate steam.

  A boiler building may be added for reasons such as an increase in power demand.In this case, the existing belt conveyor from the coal storage to the existing boiler building bunker is used, and coal is added to the building that is added via the existing building. May be transported. At this time, it is necessary to construct a bridge for installing a belt conveyor between the existing building and the additional building.

The simplest way to build a bridge is to lift the assembled bridge with a crane, move it to a position where it can be installed, attach one of the bridges to one of the buildings, and attach the other to the other of the buildings . However, this method cannot be employed when a work space such as a crane cannot be secured between the buildings.
In view of this, a method has been proposed in which a bridge is installed in one of the buildings, and the bridge is installed by feeding the bridge toward the other building.

  In Patent Document 1, a construction facility adjacent to one of the two bridge piers to be constructed is constructed, a bridge is arranged in the construction facility, and a handrail is attached to the direction in which the bridge is extended or the opposite side. Sending out along with the spreader, supporting the bridge with a handrailer on one of the piers and continuing to feed out the bridge. When the bridge hits the two piers, attach the bridge to the pier and remove the spreader and the installation equipment. A method is disclosed.

JP 2007-321389 A

  However, in the above method, since the installation facility requires a length in which the bridge and the handrail are combined, the floor surface of the building having a limited size cannot be used as a preparation space for the installation. In addition, when a bridge is arranged in the installation facility, it is lifted by a crane. However, in a place where many buildings are already arranged, it is difficult to introduce a large crane capable of lifting the bridge integrally.

  Therefore, the present invention pays attention to the above-mentioned problem, and it is possible to easily secure the work space in the ridge on the side where the bridge is sent out and to efficiently perform the erection work, and to secure the preparation space for arranging the crane. An object is to provide an inter-building bridge erection method that can be easily performed.

  In order to achieve the above object, the inter-building bridge erection method according to the present invention is such that a bridge is disposed in a first wing and the bridge is cantilevered on a second wing side adjacent to the first wing. A method of constructing the bridge in the first ridge and the second ridge, wherein the bridge is divided into a plurality of blocks in the bridge delivery direction, and the blocks are arranged in the delivery direction. The leading block is lifted and connected to a front spreader previously arranged in the first ridge, and the remaining block is moved from the distal end side while moving the leading block together with the front spreader in the feeding direction. Assembling the bridge in a state where the front reach is floated at a position between the first wing and the second wing by lifting the blocks in order and connecting the blocks together. And butterflies.

  According to the above method, in the first building on the side of sending out the bridge, it is not necessary to secure a work space for simultaneously arranging the bridge and the front reach, so it is easy to secure the work space in the first building, Construction work can be performed efficiently. Moreover, since the bridge is divided into a plurality of blocks and the blocks are lifted one by one in order, a large crane is not required, and it is easy to secure a preparation space for placing the crane.

In the present invention, a part of the front hand reacher that reaches the second ridge is separated.
In the bunker room on the existing bunker in the second wing, a belt conveyor for carrying coal is already arranged. Therefore, according to the above configuration, after the front reach reaches the bunker room in the second ridge, You can dismantle the front hand machine.

In the present invention, a first rolling contact roller that is in rolling contact with the lower surface of the front spreader is disposed in the second building.
By the above method, it is possible to easily support and send out the front spreader.

  In the present invention, the front spreader is divided into a plurality of frames in the delivery direction, and adjacent frames are connected by a detachable connecting portion from the frame, and a lower portion of the frame is connected to the delivery direction. A horizontal flange that extends to the front and forms a lower surface of the front reel, and a first vertical flange that extends in the feed direction and is attached to the center of the upper surface of the horizontal flange in the width direction, and extends in the feed direction. And a second vertical flange attached to an end in the width direction of the upper surface of the horizontal flange, and the connecting portion connects the first vertical flanges connecting the first vertical flanges adjacent to each other. It is constructed by a plate and a second splicing plate connecting the second vertical flanges adjacent to each other.

  By the above method, interference between the rolling roller and the connecting portion is avoided, and the lower surface of the front extending portion is prevented from being curved to form a gap between the horizontal flanges. It is possible to prevent the bridge and the like from being damaged due to the transmission of vibration and impact to the front spreader and the bridge every time it rolls into the gap.

In the present invention, a conveying means that can be conveyed in the longitudinal direction of the bridge is disposed on the bridge, and after the bridge is installed in the first ridge and the second ridge, the frame is used by the conveying means. And transporting to the first building.
By the above method, the front hand machine can be efficiently removed.

In the present invention, a pair of guide rails is disposed in the first ridge so as to extend along the feed-out direction and sandwich the bridge, and the second rolling contact is brought into rolling contact with the side surface of each guide rail. A roller is attached, and when the bridge is moved, the second rolling contact roller guides the bridge to be fed out.
By the above method, it is possible to suppress the shift in the bridge delivery direction.

In the present invention, the second rolling roller is formed integrally with a roller unit block that loads the bridge and travels on the first ridge, and when the bridge is sent out, the roller unit block includes: Whenever the end on the first ridge is reached, the roller unit block is rearranged to a position on the opposite side of the feeding direction from the position on the bridge on the first ridge. It is characterized by doing.
By the above method, the number of roller unit blocks can be reduced and the cost can be suppressed.

In the present invention, a stopper that is in contact with the roller unit block is disposed at a position that is an end of the guide rail on the delivery direction side.
By the above method, it is possible to prevent the bridge (truss structure 10 to be described later) from swinging or escaping in the X-axis direction when an earthquake occurs during the delivery work.

In the present invention, the roller unit block is attached with a lifting prevention metal fitting facing the lower surface of the guide rail.
By the above method, the bridge can be prevented from rising.

In the present invention, a rear spreader connected to an end of the bridge opposite to the delivery direction and extending in a direction opposite to the delivery direction is lifted and disposed on the first ridge, and the rear spreader is disposed on the bridge. It connects to the edge part on the opposite side of the said sending-out direction.
By the above method, the bridge can be passed to the second building even if the length of the bridge is about the same as the distance between the first building and the second building.

In the present invention, a weight is mounted on the rear handrail.
By the above method, the bridge can be stably passed to the second building.

In the present invention, the bridge is loaded on a multi-roller that is self-propelled by a propulsion jack built in the first building.
By the above method, the bridge can be moved with a simple configuration without occupying useless space.

In the present invention, a plurality of the roller units are provided in the roller unit block, and the extension amount of the jack is controlled so that the bridge is horizontal based on a load applied to the jack lifting the bridge built in each roller unit. It is characterized by that.
By the above method, the bridge can be moved while adjusting the level of the bridge, and the bridge can be moved stably.

  According to the inter-building bridge erection method according to the present invention, it is not necessary to secure a work space for simultaneously arranging the bridge and the front extension machine in the ridge that sends out the bridge. The work space can be easily secured and the erection work can be performed efficiently. Moreover, since the bridge is divided into a plurality of blocks and the blocks are lifted one by one in order, a large crane is not necessary, and a preparation space for arranging the crane can be easily secured.

It is an arrangement plan of bridges to which the inter-building bridge erection method of the present embodiment is applied. It is a schematic diagram which shows the connection state of the front hand machine, bridge | bridging machine, and rear hand machine of this embodiment. FIG. 3 is a plan view of FIG. 2. It is sectional drawing of the front reacher (frame part) of this embodiment, a bridge (frame part), and a rear reacher (frame part). It is a schematic diagram of the front reach of this embodiment and the divided | segmented bridge | bridging. It is a schematic diagram of the frame lower part and connection part of the front-handing machine of this embodiment. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is a mimetic diagram at the time of removing a connection part in a frame lower part of a front machine of this embodiment. It is a schematic diagram of the traveling rail, guide rail, multi-roller block, and roller unit block arranged in the first building. It is the sectional view on the AA line of FIG. It is a schematic diagram which shows the operation | work process (A front block is connected to a front extension machine) of the bridge construction method of the bridge between buildings of this embodiment. It is a schematic diagram which shows the work process (connection of a center block) of the bridge construction method of the bridge between buildings of this embodiment. It is a schematic diagram which shows the work process (removal of a support roller) of the bridge construction method between buildings of this embodiment. It is a schematic diagram which shows the operation | work process (sending out of a machine mentioned above) of the bridge construction method of the bridge between buildings of this embodiment. It is a schematic diagram which shows the work process (connection of a back block) of the bridge construction method of the bridge between buildings of this embodiment. It is a schematic diagram which shows the operation | work process (rearrangement of a roller unit block) of the bridge construction method of a bridge of this embodiment. It is a schematic diagram which shows the operation | work process (forward delivery machine and sending out of a bridge) of the bridge construction method of the bridge of this embodiment. It is a schematic diagram which shows the operation | work process (connection of a rear stretcher) of the bridge construction method of the bridge of this embodiment. It is a schematic diagram which shows the operation | work process (mounting of a weight) of the bridge construction method of the bridge of this embodiment. It is a schematic diagram which shows the operation | work process (rearrangement of a roller unit block) of the bridge construction method of a bridge of this embodiment. It is a schematic diagram which shows the work process (sending to a 2nd ridge of a front extension machine and a bridge) of the bridge construction method of the bridge between ridges of this embodiment. FIG. 23 is a plan view of FIG. 22. It is a schematic diagram which shows the operation | work process (detachment | attachment of the 1st step | frame of a frame) of the bridge construction method of the bridge between buildings of this embodiment. It is a schematic diagram which shows the operation | work process (detachment | attachment of the 2nd step | frame of a frame) of the bridge construction method of the bridge between buildings of this embodiment. It is a schematic diagram which shows the operation | work process (removal of the last flame | frame) of the bridge construction method of the bridge between buildings of this embodiment. It is a schematic diagram which shows the operation | work process (removal of a backhand machine) of the bridge construction method of an inter-building of this embodiment. It is a schematic diagram which shows the work process (attachment of a bridge | bridging) of the bridge construction method of the bridge between buildings of this embodiment.

  Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. However, the components, types, combinations, shapes, relative arrangements, and the like described in this embodiment are merely illustrative examples and not intended to limit the scope of the present invention only unless otherwise specified. . In the figure, the X axis (feeding direction), the Y axis (width direction), and the Z axis (vertical direction) are orthogonal to each other.

  In FIG. 1, the layout of the bridge used as the application object of the bridge construction method between buildings of this embodiment is shown. The inter-building bridge construction method of the present embodiment can be applied, for example, when constructing a bridge for transporting coal between buildings of a thermal power plant. The bridge 12 is connected to the first building 102 and the second building 104. The second building 104 is an existing building, for example, and includes a bunker for storing and supplying coal in addition to the boiler facility. One end of the bridge 12 is attached to the floor of a room in which a belt conveyor is disposed on the bunker of the second ridge 104. The first building 102 is, for example, a new building, and generates steam by supplying coal to the boiler facility in such a manner that coal is supplied via the second building 104.

As shown in FIG. 1, the bridge 12 has a hollow truss structure, and a belt conveyor 100 is disposed therein. The belt conveyor 100 supplies coal to the first building 102 via the second building 104.
In the present embodiment, the bridge 12 is disposed in the first ridge 102, and the bridge 12 is sent out while being cantilevered to the second ridge 104 side adjacent to the first ridge 102. A construction method is employed in which the first building 102 and the second building 104 are installed.

  In the present embodiment, the bridge 12 is divided into a plurality of blocks (front block 38, center block 40, rear block 42, FIG. 5) in the delivery direction (X-axis direction) of the bridge 12, Then, the block (front block 38) which becomes the tip in the delivery direction is lifted and connected to the front hand extender 18 (FIG. 2) previously arranged in the first ridge 102.

  Then, while moving the block at the leading end together with the front spreader 18 in the feeding direction, the remaining blocks are lifted in order from the leading end side, and the blocks are connected to each other. The bridge 12 is assembled in a state of floating at a position between the second ridge 102 and the second ridge 104.

  Between the first building 102 and the second building 104, outdoor units and the like of the air conditioning facilities of the first building 102 and the second building 104 are already arranged, and may not be used as a work space. In addition, the first building 102 is not designed with a margin for installing the bridge 12, so that a sufficient work space cannot be secured in the first building 102.

  However, according to the above method, in the first ridge 102 on the side where the bridge 12 is sent out, it is not necessary to secure a work space for simultaneously arranging the bridge 12 and the front spreader 18. The work space can be easily secured and the erection work can be performed efficiently. Moreover, since the bridge 12 is divided into a plurality of blocks and the blocks are lifted one by one in order, a large crane is not required, and it is easy to secure a preparation space for placing the crane. Hereinafter, the present embodiment will be described more specifically.

  FIG. 2 is a schematic diagram (side view) showing a connection state of the front reacher, bridge, and rear reacher of the present embodiment, FIG. 3 is a plan view of FIG. 2, and FIG. 4 is a front reach of the present embodiment. Sectional drawing of a machine (frame part), a bridge (frame part), and a rear hand extending machine (frame part) is shown. As shown in FIGS. 2 to 4, the bridge 12, the front spreader 18, and the rear spreader 20 all have a truss structure, and the rectangular frame-shaped frame portions 22 </ b> A to 22 </ b> C define the openings as X. A plurality of frame portions 22A to 22C that are aligned in the axial direction and are arranged at regular intervals in the X-axis direction are connected to each other via upper beams 24A to 24C and lower beams 26A to 26C, respectively. Furthermore, the integrated body by frame part 22A-22C, upper beam 24A-24C, and lower beam 26A-26C is reinforced by brace 28A-28C, and each has acquired rigidity as a whole.

  A front connection portion 14 is provided at the front end of the bridge 12 in the + X-axis direction, and the front connection portion 14 is connected to the front spreader 18 by bolting or the like. Further, a rear connection portion 16 is provided at the front end of the bridge 12 in the −X axis direction, and the rear connection portion 16 is connected to the rear spreader 20 by bolting or the like. In the present embodiment, when the bridge 12 is installed, the rear spreader 20, the bridge 12, and the front spreader 18 are integrated to form the truss structure 10 that has acquired rigidity.

  The front connection unit 14 is attached to the second building 104 when the bridge 12 reaches the second building 104, and the rear connection unit 16 is used when the bridge 12 reaches the second building 104. It is attached to the first ridge 102.

  Further, in the truss structure 10, the suspension rails 30 are arranged in a straight line over the longitudinal direction (X-axis direction) of the truss structure 10, and the suspension rails 30 are arranged in frame portions 22 </ b> A to 22 </ b> C (may be in other places). It is supported by the connected support tool 32. The suspension rail 30 is provided with a suspension bracket 34 that moves along the suspension rail 30 and a drive mechanism (not shown) that moves the suspension bracket 34 along the suspension rail 30. The transport means including the suspension rail 30, the suspension bracket 34, and the drive mechanism transports the brace 28B of the front hand extender 18 and the like as will be described later.

  The front spreader 18 is connected to the front connection portion 14 of the bridge 12 and supports the bridge 12 (truss structure 10) after reaching the second building 104 prior to the bridge 12 when the bridge 12 is sent out. Is. On the other hand, the rear hand machine 20 cantilever the bridge 12 and the front hand machine 18 until the front hand machine 18 is sent out from the first building 102 and reaches the second building 104. It is. Further, the rear spreader 20 is provided with a weight 36 as will be described later in order to stably support the cantilever.

  In FIG. 5, the schematic diagram of the front reacher of this embodiment and the divided | segmented bridge | bridging is shown. As shown in FIG. 5, the bridge 12 is divided into a front block 38, a central block 40, and a rear block 42 before lifting. By dividing the bridge 12 in this way, the burden on the crane 92 (FIG. 12) that lifts the bridge 12 can be reduced.

  The front spreader 18 can be divided at a position indicated by a two-dot chain line in FIG. That is, the front spreader 18 is divided into a plurality of frames 44 in the delivery direction (X-axis direction). In this case, a configuration in which the upper beam 24B and the lower beam 26B of the front hand spreader 18 can be divided at a position where the frame portion 22B is connected or a position between the adjacent frame portions 22B can be applied. In this case, the connection position of each beam and the frame portion 22B, or the state where the beams that are in contact with each other are bolted and connected, and the bolting is released when the beam is divided can be applied. However, in the lower beam 26B (lower portion of the frame 44), the frames 44 adjacent to each other are connected by a connecting portion 46 that is detachable from the lower beam 26B.

  FIG. 6 shows a schematic view of the lower part of the frame and the connecting portion of the machine described in the present embodiment, FIG. 7 is a sectional view taken along line AA in FIG. 6, and FIG. 8 is a sectional view taken along line BB in FIG. The figure is shown. FIG. 9 is a schematic diagram when the connecting portion is removed from the lower part of the frame of the machine described in the present embodiment.

  As shown in FIG. 6 and the like, the lower beam 26B extends in the X-axis direction, and its cross section has a shape in which the letter H is laid down (FIG. 7). The lower beam 26B is disposed in parallel with the first horizontal flange 48 at the upper part of the first horizontal flange 48 and the first horizontal flange 48 that forms the lower surface of the lower beam 26B, and forms the upper surface of the lower beam 26B. And a first vertical flange 52 that connects the first horizontal flange 48 and the second horizontal flange 50 to each other. A first rolling roller 74 described later is in rolling contact with the lower surface of the first horizontal flange 48. The first vertical flange 52 extends in the X-axis direction similarly to the first horizontal flange 48 and the second horizontal flange 50, and the center portion of the upper surface of the first horizontal flange 48 and the lower surface of the second horizontal flange 50. Connected to the center of the.

  Further, second vertical flanges 54 are disposed at both ends of the upper surface of the first horizontal flange 48. The second vertical flange 54 is arranged in parallel with the first vertical flange 52, but the upper end thereof is lower than the lower surface of the second horizontal flange 50 and is spaced at a constant interval.

  Further, a reinforcing plate 56 that is joined to the first horizontal flange 48, the second horizontal flange 50, the first vertical flange 52, and the second vertical flange 54 is disposed to support the rigidity of the second vertical flange 54. ing.

  When the adjacent frames 44 are connected to each other and the front spreader 18 is constructed, the ends of the first horizontal flange 48 and the second horizontal flange 50 are positioned between the adjacent frames 44. The ends, the ends of the first vertical flange 52, and the ends of the second vertical flange 54 are in contact with each other.

  The first vertical flanges 52 adjacent to each other are both sandwiched by the first splicing plate 58, and the second vertical flanges 54 adjacent to each other are sandwiched by the second splicing plate 60. It is rare. Similarly, the second horizontal flanges 50 adjacent to each other are sandwiched by the third splicing plate 62. Bolt holes 64 that communicate with each other are formed in each flange and each splicing plate that sandwiches each flange, and bolts 66 are inserted into the bolt holes 64 and bolted using nuts 68 so that the frames 44 adjacent to each other are connected to each other. Is connected with a certain rigidity.

  In the present embodiment, when the front spreader 18 reaches the second building 104 and supports the bridge 12, the first rolling roller 74 in the frame 44 constituting the front spreader 18 is changed. A force that curves so as to protrude downward is applied to the frame 44 before passing. Thereby, a force is received in the direction in which the interval between the first horizontal flanges 48 is expanded in the frames 44 adjacent to each other. However, in the present embodiment, the second vertical flange 54 is arranged at a position (lower part of the lower beam 26B) where the displacement is the largest with respect to the bending force, and the second vertical flanges 54 adjacent to each other are arranged. Since it fixes by the 2nd splicing board 60, it can prevent that the space | interval of 1st horizontal flanges 48 spreads. Further, since the second vertical flange 54 is not disposed on the lower surface of the first horizontal flange 48, it does not interfere with the first rolling roller 74.

The front machine 18 can avoid interference between the first rolling roller 74 and the connecting portion 46 by including the above-described configuration. Further, the lower surface of the front extending portion 18 is curved to avoid the formation of a gap between the first horizontal flanges 48, so that the front of the first rolling contact roller 74 rolls into the gap. It is possible to prevent the bridge 12 and the like from being damaged due to the vibration and impact transmitted to the hand-roller 18 and the bridge 12.
In addition, as shown in FIG. 9, the frames 44 adjacent to each other can be separated by releasing all bolt tightening and removing all the connecting plates (connecting portions 46).

  FIG. 10 shows a schematic diagram of a traveling rail, a guide rail, a multi-roller block, and a roller unit block arranged in the first building, and FIG. 11 shows a cross-sectional view taken along line AA of FIG. As shown in FIG. 10, a guide rail 70 and a travel rail 82 are arranged on the floor surface of the first ridge 102, extending along the delivery direction (X-axis direction) of the truss structure 10. The guide rail 70 is a member extending in the X-axis direction on the first ridge 102, and is arranged so that the end in the + X-axis direction does not protrude from the first ridge 102. The guide rails 70 are arranged in pairs so as to sandwich the truss structure 10 from the width direction (Y-axis direction). Further, the guide rail 70 is arranged in a form floating at a certain height from the floor surface of the first ridge 102 and is supported by a guide bracket 72 fixed to the floor surface of the first ridge 102.

  The multi-roller block 77 and the roller unit block 76 are disposed between the pair of guide rails 70. The multi-roller block 77 is self-propelled in the + X-axis direction while loading the truss structure 10. The multi-roller block 77 includes a pair of multi-rollers 79 having a driving propulsion jack (not shown) that travels in the X-axis direction, and a block portion 80 that connects the multi-rollers 79 to each other. The propulsion jack includes, for example, a drive jack (not shown) attached to the multi-roller 79 and extending in the −X axis direction, and an anchor jack (not shown) attached to the tip of the drive jack. . Here, the anchor jack can be extended so as to press the floor surface with the multi-roller 79 as a fulcrum. At this time, the anchor jack can press the anchor jack itself against the floor surface without lifting the multi-roller block 77 from the floor surface due to the load of the truss structure 10. Therefore, the multi-roller block 77 can be self-propelled in the + X-axis direction using the frictional force with respect to the floor surface of the anchor jack and the force by which the drive jack extends.

  The roller unit block 76 travels in the + X-axis direction while loading the truss structure 10. The roller unit block 77 has a pair of roller units 78 that travel in the X-axis direction, and a block portion 81 that connects the pair of roller units 78 to each other. Since the roller unit block 76 does not include a drive device, the roller unit block 76 travels in the X-axis direction by being driven by the multi-roller block 77 or being pulled by a traction device. Thus, since the truss structure 10 is moved by the multi-roller block 77 and the roller unit block 76 on which the truss structure 10 is loaded, the truss structure 10 can be moved without occupying useless space with a simple configuration.

  When the bridge 12 is sent out, the multi-roller 79 or the roller unit 78 supports the truss structure 10 by supporting either the bridge 12 or the rear spreader 20. The truss structure 10 can be sent out in the + X-axis direction by the multi-roller 79 traveling in the + X-axis direction.

  In this embodiment, a multi-roller block 77 and a roller unit 78 are used. As a result, two or four multi-rollers 79 are used, and two roller units 78 are used. The roller unit 78 includes a jack 78b, can measure the load applied to the roller unit 78 from the hydraulic pressure of the jack 78b, and can adjust the level of the truss structure 10 by adjusting the amount of jack. That is, the amount of extension of the jack 78b can be controlled so that the truss structure 10 (bridge 12) is horizontal based on the load applied to the jack 78b.

  For example, when the vertical bisector of the two roller units 78 aligned in the Y-axis direction matches the X-axis direction component of the center of gravity of the truss structure 10, the load applied to each jack 78b is made uniform. By controlling the feed amount, the Y-axis direction of the truss structure 10 can be kept horizontal. Furthermore, the X-axis direction of the truss structure 10 can be kept horizontal by controlling the feed amount in a state where the load applied to each jack 78b is made uniform. Further, the above-described control is possible even while the multi-roller 79 is traveling. Therefore, in this embodiment, the multi-roller 79 moves the truss structure 10 in the + X-axis direction, and the roller unit 78 controls the posture of the moving truss structure 10 in the X-axis direction and the Y-axis direction. Therefore, the truss structure 10 (bridge 12) can be moved while adjusting the level of the truss structure 10 (bridge 12), and the truss structure 10 (bridge 12) can be moved stably.

  The traveling rail 82 extends in the X-axis direction and is disposed at a passing position of the multi-roller unit 79 and the roller unit 78. A central portion of the traveling rail 82 has a traveling guide 84 that extends in the X-axis direction and serves as a protrusion, and a multi-roller 79 and a roller unit 78 are disposed so as to sandwich the traveling guide 84 from the side surface direction.

  A second rolling roller 86 and a lifting prevention metal fitting 88 are attached to both ends of the block portions 80 and 81 in the width direction. The second rolling roller 86 is in rolling contact with the side surface of the guide rail 70. Thereby, when the multi-roller block 77 and the roller unit block 76 move in the X-axis direction, the travel guide 84 and the guide rail 70 can be guided to feed the truss structure body 10 in the X-axis direction.

  As shown in FIG. 11, the anti-lifting metal fitting 88 is an L-shaped metal fitting that is arranged at a position lower than the lower surface of the guide rail 70 so as to be spaced apart from each other. Thereby, when the truss structure 10 is sent out, the balance of the truss structure 10 is lost, and even if a force to lift the truss structure 10 is applied to the truss structure 10, the lifting prevention metal fitting 88 receives it. Lifting of the truss structure 10 (bridge 12) can be suppressed.

  Further, a stopper 90 is disposed at the end of the guide rail 70 in the + X-axis direction, and the roller unit block 76 comes into contact with the stopper 90. Therefore, it is possible to prevent the truss structure body 10 from shaking or escaping in the X-axis direction when an earthquake occurs during the delivery work.

  As described above, the roller unit block 76 is configured to be detachable from the truss structure 10. Therefore, when the roller unit block 76 comes into contact with the stopper 90, as described later, after the roller unit block 76 is removed, the roller unit block 76 is moved to the −X axis side to change the mounting position on the truss structure 10. Can do. Thereby, it is not necessary to use many roller unit blocks 76, and cost can be suppressed. The roller unit block 76 (roller unit 78) is disposed at a position directly below the frame portions 22B and 22C in order to avoid bending of the truss structure 10 (lower beams 26B and 26C).

  Next, the work process of the inter-building bridge construction method of this embodiment is demonstrated. In this work process, the crane 92 that lifts the front reach 18 and the like, the caster 94 that supports traveling while supporting the truss structure 10 in the first building 102, and the truss structure 10 are jacked up or down. A vertical jack 96, a temporary holder 98 that temporarily supports the truss structure 10, and a first rolling roller 74 that is in contact with the lower surface of the front spreader 18 in the second building 104 and supports the front spreader 18. Etc. are used.

  FIG. 12 to FIG. 28 are schematic views showing work steps of the inter-building bridge erection method according to this embodiment. 12 to 28 (excluding FIG. 23), for simplification, among those previously arranged in the first ridge 102 (FIG. 10), the stopper 90, the roller unit block 76, and the multi-roller Represents a block 77, and other components are omitted.

  As shown in FIG. 12, the front reach 18 is lifted by a crane 92 and placed in the first building 102, and the front reach 18 is pulled to a position where the front reach 18 and the front block 38 can be connected. Move to the + X-axis side by the device. At this time, casters 94 (two places) are attached in advance to a position facing the lower portion of the frame portion 22B of the front spreader 18. Further, the support 32 (FIG. 16) and the suspension rail 30 are attached to the inside of the front spreader 18.

  On the other hand, a caster 94 is attached in advance to a position facing the lower portion of the frame portion 22A arranged in the −X axis direction of the front block 38. The casters 94 are height-adjusted in advance according to the height of the front spreader 18 and the front block 38 when the first ridge 102 is arranged. And the front block 38 is lifted with the crane 92, and the front connection part 14 of the front block 38 and the edge part by the side of the -X axis of the front spreader 18 are connected. At this time, the roller unit block 76 that is lifted in advance by the crane 92 is attached to the first ridge 102 at a position facing the lower portion of the frame portion 22A arranged in the + X-axis direction of the front block 38. Then, the connected front block 38 and the front spreader 18 are moved by a traction device or the like to a position where the central block 40 (FIG. 13) can be connected.

  As shown in FIG. 13, the central block 40 is lifted by a crane 92 and joined to the front block 38. At this time, the temporary support 98 is attached to a position facing the lower part of the + X-axis side frame portion 22A and the −X-axis side frame portion 22A of the central block 40, and the multi-roller block 77 is located on the most −X-axis side of the central block 40. It attaches to the lower part of 22 A of frame parts arrange | positioned.

  As shown in FIG. 14, the + X-axis end of the lower surface of the front spreader 18 and the central block 40 is jacked up by a vertical jack 96, and casters 94 attached to the front reacher 18 and the front block 38 The temporary holder 98 of the central block 40 is removed. After the caster 94 and the temporary support 98 are removed, the vertical jack 96 is removed by jacking down.

As shown in FIG. 15, the multi-roller block 77 sends out (moves) the front spreader 18, the front block 38, and the central block 40 in the + X-axis direction, and sends them out until the roller unit block 76 contacts the stopper 90.
As shown in FIG. 16, the rear block 42 is lifted by a crane 92, and a temporary support 98 is installed under the frame portion 22 </ b> A and joined to the central block 40. Thereby, the bridge 12 is assembled in a state where the front spreader 18 floats at a position between the first building 102 and the second building 104. At this time, the support tool 32 and the suspension rail 30 are attached to the bridge 12 so that the suspension bracket 34 can be moved in the front spreader 18 and the bridge 12 by the suspension rail 30.

As shown in FIG. 17, the bridge 12 is jacked up by the vertical jack 96, the roller unit block 76 in contact with the stopper 90 is removed, and the roller unit block 76 is located on the −X axis side from the position where the roller unit block 76 is first attached. And rearranged to a position directly below the frame 22A. In addition, the temporary support 98 is removed while being jacked up by the vertical jack 96, the vertical jack 96 is jacked down to become lower than the roller unit block 76 and the multi-roller block 77, and the vertical jack 96 is removed.
As shown in FIG. 18, the multi-roller block 77 feeds the front spreader 18 and the bridge 12 to the + X axis side, and feeds until the roller unit block 76 contacts the stopper 90.

  As shown in FIG. 19, the vertical jack 96 jacks up the rear side of the bridge 12 in a cantilevered state, removes the multi-roller block 77, and temporarily positions it at a position directly below the frame portion 22 </ b> A on the −X axis side of the bridge 12. The support 98 is inserted, the bridge 12 is supported by the temporary support 98, and the vertical jack 96 is jacked down. Then, the rear spreader 20 is lifted by the crane 92 and connected to the rear connection portion 16 of the bridge 12. At that time, an intermediate member or the like is arranged on the multi-roller block 77 to adjust the height, and is arranged at a position directly below the frame portion 22C of the rear hand extender 20, so that the multi-roller block 77 is placed in the rear hand reach 20. Attach to. As a result, the truss structure 10 is formed by the rear spreader 20, the bridge 12, and the front spreader 18. Thereafter, the vertical jack 96 is jacked up again to remove the temporary support 98, and then the vertical jack 96 is jacked down and removed.

As shown in FIG. 20, a weight 36 is mounted on the rear part of the rear spreader 20 and the center of gravity of the truss structure 10 is moved rearward (−X axis side). Further, the support 32 and the suspension rail 30 are arranged in the rear hand extender 18 so that the suspension fitting 32 can be moved by the suspension rail 30 in the entire longitudinal direction of the truss structure 10.
As shown in FIG. 21, the truss structure 10 is jacked up by the vertical jack 96, and the temporary support 98 is inserted to support the truss structure 10 in the same manner as described above. Is replaced with a position to be a lower portion of the frame portion 22A behind the bridge 12.

  22 and 23 (plan view of FIG. 22), the multi-roller block 77 is used to feed the truss structure 10 toward the second ridge 104 in the + X-axis direction. Send out until it touches. At this time, the truss structure 10 (bridge 12) is sent out from the first building 102 to the second building 104 in a cantilevered state by the roller unit block 76. As a result, the front end of the front hand extender 18 reaches the second building 104, and therefore the first rolling roller 74 is placed at a position on the floor surface of the second building 104 facing the front end of the front hand extender 18. Deploy. Accordingly, the truss structure 10 is supported by the multi-roller block 77, the roller unit block 76, and the first rolling roller 74.

  As shown in FIG. 24, the roller unit block 76 is replaced on the rear side of the bridge 12 by the same method as described above, and the truss structure 10 is moved in the + X-axis direction. And the frame 44 of the front-end | tip which passed the 1st rolling contact roller 74 is removed among the frames 44 which comprise the front spreader 18. At this time, the upper beam 24B, the lower beam 26B, and the brace 28B constituting the frame 44 are separated from the rear frame 44, but the lower beam 26B is separated by releasing the connection of the connecting portion 46.

  Prior to the separation of the frame 44, the first rolling roller 74 passes through the connecting portion 46 to be released, but the first horizontal flange 48 (FIGS. 6 to 9) on the lower surface of the lower beam 26B. Since there are no obstacles such as protrusions and no gap is formed between the first horizontal flanges 48 adjacent to each other as described above, the first rolling contact roller 74 smoothly connects the frames 44 adjacent to each other. The truss structure 10 is not vibrated or shocked.

  Then, of the removed frame 44, for example, an integrated object composed of the frame portion 22B, the upper beam 24B, the lower beam 26B, and the brace 28B is temporarily placed on the second ridge 104, and the frame portion 22B and the brace 28B are The truss structure 10 is transported to the first ridge 102 by the hanging metal fittings 34 arranged in the truss structure 10. Note that a suspension rail (not shown) and a suspension fitting (not shown) that travels on the suspension rail (not shown) are arranged on the ceiling of the bunker room of the second ridge 104, and the above-described integrated object is attached to the suspension fitting (not shown). It may be lifted by a not-shown and temporarily placed on the second ridge 104 in a single-point support state by a hanging metal fitting (not shown).

  As shown in FIG. 25, the roller unit block 76 is further replaced on the rear side of the truss structure 10 by the same method as described above, and the truss structure 10 is moved in the + X-axis direction. Then, the frame 44 that has passed through the first rolling contact roller 74 is removed from the frame 44 that constitutes the front spreader 18 in the same manner as described above, and a part of the frame 44 is conveyed by the hanging bracket 34 as described above, and the rest Is temporarily placed in the second ridge 104. Similarly, portions of the support 32 and the suspension beam 30 that have passed through the first rolling roller 74 are also removed and conveyed to the first ridge 102 by the suspension fitting 34. In this way, the roller unit block 76 is replaced with the rear side of the truss structure 10 (including the rear spreader 20) and the truss structure 10 is sent to the + X-axis side, and the first rolling roller 74 is passed. The process of removing the frame 44 is repeated until all of the frame 44 is removed.

As shown in FIG. 26, when the final frame 44 of the front spreader 18 is removed, the front connection portion 14 of the bridge 12 reaches the second ridge 104.
As shown in FIG. 27, a vertical jack 96 is inserted at a position directly below the front connecting portion 14 and the rear connecting portion 16, and the vertical jack 96 is jacked up to support the bridge 12, and the rear spreader 20 is bridged. It is separated from 12 and suspended by a crane 92.

  As shown in FIG. 28, the vertical jack 96 is removed by jackdown, the front connection portion 14 is connected to the second ridge 104, and the rear connection portion 16 is connected to the first ridge 102. The jack-down method is performed as follows, for example. First, a plurality of spacers (not shown) having a height lower than the stroke length of the vertical jack 96 are stacked, and a first portion (not shown) in which the vertical jack 96 is disposed thereon is formed. Here, the first portion is disposed at a position where the vertical jack 96 of FIG. 27 is located. In addition, the position of the above-described spacer facing the front connection portion 14 of the second ridge 104 (position adjacent to the vertical jack 96) and the position facing the rear connection portion 16 of the first ridge 102 (on the vertical jack 96). A second portion (not shown) is formed such that the upper end of each of the vertical jacks 96 is slightly higher than the lowest position of the movable range at the upper end of the vertical jack 96.

  Thus, during the jackdown of the vertical jack 96, the load of the bridge 12 is not applied to the vertical jack 96, and the load of the bridge 12 is applied to the spacer of the second portion. On the contrary, during the jack-up of the vertical jack 96, the bridge load is not applied to the spacer of the second portion, and the load of the bridge 12 is applied to the vertical jack 96 and the spacer of the first portion. Then, the jack-up and jack-down of the vertical jack 96 are repeated, and the spacers to which the bridge 12 is not loaded are removed one by one each time. This operation is repeated until all the first portion spacers are removed, and then the vertical jack 96 is removed.

Next, when the bridge 12 is arranged in the first ridge 102 and the second ridge 104, the gap between the front connection portion 14 and the second ridge 104 and the gap between the rear connection portion 16 and the first ridge 102. A second vertical jack (not shown) that includes the height of the second portion in the stroke range is disposed in the first portion (for example, the position where the vertical jack 96 is disposed), etc. Remove the spacer. Then, by jacking down the second vertical jack, the front connection portion 14 and the rear connection portion 16 are newly disposed on the floor surface (or the second portion or the like during the jack-up of the second vertical jack). And the second vertical jack can be taken out.
Finally, the above-mentioned integrated object temporarily placed in the second ridge 104 is transported to the first ridge 102 by the hanging bracket 34 and is suspended by the crane 92, whereby all the processes are completed.

  By performing the above steps, it is not necessary to secure a work space for simultaneously arranging the bridge 12 and the front spreader 18 in the first building 102 on the side of sending out the bridge 12. The work space can be easily secured and the erection work can be performed efficiently. Also, the bridge 12 is divided into a plurality of blocks (front block 38, center block 40, rear block 42), and the blocks are lifted one by one in order, so a large crane is not required and it is easy to secure a preparation space for placing the crane. It becomes.

  As described above, the belt conveyor is arranged in the bunker room on the bunker of the second ridge 104 to which the front reach 18 reaches. For this reason, it was necessary to separate the front hand extender 18 after reaching the bunker room of the second building 104. In the present embodiment, the front spreader is structured to be disassembled, and a bridge can be built to an existing building.

  In the present embodiment, a first rolling roller 74 that is in rolling contact with the lower surface of the front spreader 18 is disposed in the second building 104. As a result, the front spreader 18 can be easily supported and delivered.

  In the present embodiment, the connecting portion 46 is disposed on the lower side of the lower beam 26 </ b> B of the frame 44 constituting the front hand extender 18. Thereby, while avoiding interference with the 1st rolling roller 74 and the connection part 46, the lower surface of the front extension part 18 curves, and the clearance gap between 1st horizontal flanges 48 is formed. As a result, every time the first rolling roller 74 rolls into the gap, vibrations and impacts are transmitted to the front spreader 18 and the bridge 12, thereby preventing the bridge 12 and the like from being damaged. it can.

  In the present embodiment, the suspension bracket 34 is disposed on the bridge 12, the bridge 12 is installed in the first ridge 102 and the second ridge 104, and then the frame 44 is transferred to the first ridge 102 using the suspension bracket 34. doing. Thereby, the front spreader 18 can be removed efficiently.

  In the present embodiment, a pair of guide rails 70 is arranged in the first ridge 102 and is brought into contact with the bridge 12 (the roller unit block 76 and the multi-roller block 77 on which the bridge 12 is loaded) on the side surface of the guide rail 70. When the second rolling contact roller 86 is attached and the bridge 12 is sent out, the second rolling contact roller 86 guides the feeding of the bridge 12. Thereby, the shift | offset | difference of the delivery direction of the bridge | bridging 12 can be suppressed.

  In this embodiment, every time the roller unit block 76 reaches the end on the first ridge 102, the roller unit block 76 is changed to a position on the bridge 12 (truss structure 10) that is opposite to the feeding direction. Thereby, the number of roller unit blocks 76 can be reduced and cost can be suppressed.

In the present embodiment, a stopper 90 that comes into contact with the roller unit block 76 is disposed at a position that is an end of the guide rail 70 on the feed direction side. As a result, it is possible to prevent the truss structure 10 from shaking or escaping in the X-axis direction when an earthquake occurs during the delivery work.
In the present embodiment, a lifting prevention metal fitting 88 disposed close to the lower surface of the guide rail 70 is attached to the roller unit block 76 and the multi-roller block 77. Thereby, the floating of the bridge 12 (truss structure 10) can be suppressed.

  In the present embodiment, a front reach 18 is connected to the front of the bridge 12 and a back reach 20 is connected to the rear. As a result, even when the length of the bridge 12 is approximately the same as the distance between the first ridge 102 and the second ridge 104, the bridge 12 can be passed to the second ridge 104. Further, a weight 36 is mounted on the rear hand machine 20. Thereby, the bridge 12 can be stably passed to the second ridge 104.

  In the present embodiment, when the length of the bridge 12 is sufficiently longer than the distance between the first building 102 and the second building 104, the rear spreader 20 is not necessary. In this case, a weight 36 may be mounted on the rear side of the bridge 12 and the center of gravity of the truss structure including the front spreader 18 and the bridge 12 may be moved to the first ridge 102 side.

  It is possible to easily secure the work space in the ridge on the side where the bridge is sent out and efficiently perform the erection work, and it is also possible to easily secure the preparation space for placing the crane. Available as

10... Truss structure, 12... Bridge, 14... Front connection part, 16... Rear connection part, 18 .... Front reach machine, 20 .... Rear reach machine, 22A to 22C ......... Frame, 24A-24C ......... Upper beam, 26A-26C ......... Lower beam, 28A-28C ......... Brace, 30 ......... Suspension rail, 32 ......... Supporting tool, 34 ......... Suspension bracket, 36 ......... Weight, 38 ......... Front block, 40 ......... Center block, 42 ......... Back block, 44 ......... Frame, 46 ......... Connecting portion, 48 ......... First Horizontal flange, 50 ......... Second horizontal flange, 52 ......... First vertical flange, 54 ......... Second vertical flange, 56 ......... Reinforcement plate, 58 ...... First splice plate , 60 ......... second splice plate, 62 ......... third splice plate, 64 ......... bo Hole, 66 ......... bolt, 68 ......... nut, 70 ......... guide rail, 72 ......... guide bracket, 74 ......... first rolling roller, 76 ......... roller unit block, 77 ... ...... Multi-roller block, 78 ......... Roller unit, 78a ......... Driving roller, 78b ......... Jack, 79 ......... Multi-roller, 80 ......... Block part, 81 ......... Block part, 82 ... ... travel rail, 84 ... travel guide, 86 ... second rolling roller, 88 ......... lift-up prevention metal fitting, 90 ......... stopper, 92 ......... crane, 94 ...... caster, 96 ... ...... Vertical jack, 98 ......... Tentative receptacle, 100 ......... Belt conveyor, 102 ......... First building, 104 ...... Second building.

Claims (13)

A bridge is arranged in the first building, and the bridge is cantilevered and supported on the second building side adjacent to the first building, and the bridge is installed in the first building and the second building. It is a construction method that
Dividing the bridge into a plurality of blocks in the delivery direction of the bridge;
Among the blocks, the block that is the tip in the delivery direction is lifted and connected to a front hand extender that is arranged in advance in the first wing,
By moving the block at the leading end together with the front hand extender in the feeding direction and lifting the remaining blocks in order from the front end side to connect the blocks together, the front hand extender is connected to the first building and the first building. An inter-building bridge erection method, wherein the bridge is assembled in a state of being floated at a position between the second ridges.   2. The inter-building bridge erection method according to claim 1, wherein a part of the front hand machine reaching the second ridge is separated.   The inter-building bridge erection method according to claim 1 or 2, wherein a first rolling contact roller that rolls on the lower surface of the front spreader is disposed in the second building. The front spreader is divided into a plurality of frames in the delivery direction and the frames adjacent to each other are connected by a detachable connecting portion from the frame,
The lower part of the frame,
A horizontal flange that extends in the delivery direction and forms a lower surface of the front spreader; a first vertical flange that extends in the delivery direction and is attached to a central portion in the width direction of the upper surface of the horizontal flange; and the delivery A second vertical flange extending in the direction and attached to the widthwise end of the upper surface of the horizontal flange,
The connecting portion,
It is constructed by a first splicing plate connecting the first vertical flanges adjacent to each other and a second splicing plate connecting the second vertical flanges adjacent to each other. Item 4. The bridge erection method between bridges according to item 3. A conveying means that can be conveyed in the longitudinal direction of the bridge is disposed on the bridge,
5. The frame according to claim 3, wherein after the bridge is installed in the first building and the second building, the frame is transferred to the first building using the transfer unit. Building bridge construction method between buildings. In the first ridge, a pair of guide rails are arranged so as to extend along the feeding direction and sandwich the bridge.
A second rolling roller that rolls on the side surface of each guide rail is attached to the bridge,
When moving the bridge,
6. The inter-building bridge erection method according to claim 1, wherein the bridge is guided by the second rolling contact roller. 7. The second rolling roller;
Formed integrally with a roller unit block that carries the bridge and travels on the first building,
When the bridge unit is delivered, each time the roller unit block reaches the end on the first ridge,
6. The inter-building bridge according to claim 5, wherein the roller unit block is rearranged to a position on the opposite side of the feeding direction from a position on the first ridge of the bridge. Construction method.   The inter-building bridge erection method according to claim 6, wherein a stopper that contacts the roller unit block is disposed at a position that is an end portion of the guide rail on the delivery direction side.   The inter-building bridge erection method according to claim 7 or 8, wherein a lifting prevention metal fitting facing the lower surface of the guide rail is attached to the roller unit block. A rear hand stretcher connected to an end of the bridge opposite to the delivery direction and extending in the direction opposite to the delivery direction is disposed on the first ridge,
The inter-building bridge erection method according to any one of claims 1 to 9, wherein the rear spreader is connected to an end portion of the bridge opposite to the feeding direction.   The inter-building bridge erection method according to claim 10, wherein a weight is mounted on the rear spreader.   The inter-building bridge erection method according to any one of claims 1 to 11, wherein the bridge is loaded on a multi-roller that is self-propelled by a propulsion jack built in the first ridge. A plurality of the roller units are provided in the roller unit block,
The feed amount of the jack is controlled so that the bridge is horizontal based on a load applied to the jack that lifts the bridge built in each roller unit. The building bridge construction method described.

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