JP3923033B2 - Bridge construction method and bridge superstructure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bridge construction method and a bridge superstructure.
[0002]
[Prior art]
For example, on highways where there is a lot of traffic, the construction of three-dimensional intersections with heavy traffic congestion has been carried out in the past, but conventional three-dimensional intersection maintenance projects have made construction costs as low as possible. The social and economic generated by the traffic congestion on the main road and the surrounding area during the construction period and the resulting stagnation of urban functions, the deterioration of the surrounding environment due to the prolonged construction period, etc. No consideration was given to any loss.
[0003]
[Patent Document 1]
JP-A-8-170308
[0004]
In recent years, proposals have been made to comprehensively evaluate social infrastructure development projects, including these secondary losses. The proposal is to convert the above social and economic losses into monetary amounts, consider it as a maintenance project expenditure together with the construction cost of the construction itself, and ask the right or wrong of the maintenance project according to the amount of the expenditure. It is attracting attention as an attempt to put a stone in the way of conventional maintenance business.
[0005]
[Problems to be solved by the invention]
Needless to say, the traffic congestion due to construction has the most impact on the surrounding area in the construction project of the multi-level intersection. If road regulations and traffic restrictions on some lanes become longer due to construction work, not only will the traffic volume in the construction area and the surrounding area decrease, preventing the residents from moving around, but also the distribution of goods will stagnate. It is not difficult to imagine that a large loss will occur directly or indirectly, such as the economic activities of the surrounding society being damaged. Furthermore, it is expected that environmental pollution will be caused by automobile exhaust gas due to prolonged construction and increased traffic congestion.
The most effective way to reduce such social and economic losses as much as possible is how to shorten the construction period, or even if the overall construction period is long, road regulation and traffic in some lanes It is how to minimize regulations.
[0006]
The present invention has been made in view of the above circumstances, and suppresses the above-mentioned social and economic losses as much as possible in building a bridge, and reduces the expenditure of the maintenance business combined with the construction cost of the construction itself. The purpose is to do.
[0007]
[Means for Solving the Problems]
As means for solving the above problems, a bridge construction method and a bridge superstructure having the following configuration are adopted.
That is, the construction method of the bridge according to claim 1 according to the present invention has a structure in which the superstructure to be laid on the pier is divided into a plurality in the direction intersecting the bridge axis and these divided bodies are connected and folded together. The superstructure is installed on the pier in a state where the plurality of divided bodies are folded, and then the divided bodies are expanded.
In addition, the superstructure in the present invention refers to a structure erected on a pier (for example, the bridge unit 10 in the first embodiment to be described later) or a lateral beam (for example, a later-described first beam to be described later). 3) in the third embodiment.
[0008]
In the present invention, by installing the upper work on the pier in a state where the width is reduced by folding the upper work, the area where traffic other than the road and entry of humans other than workers should be restricted is narrow. As a result, traffic restrictions under the road are kept to a minimum.
[0009]
The method for constructing a bridge according to claim 2 is the method for constructing a bridge according to claim 1, wherein the superstructure is folded in such a manner that another divided body is superimposed on a certain divided body among the plurality of divided bodies. Then, after the superstructure is installed on the pier, the other divided body is developed with respect to the certain divided body.
[0010]
In the present invention, by installing the upper work on the pier in a state where the width is reduced by folding the upper work, the area where traffic other than the road and entry of humans other than workers should be restricted is narrow. As a result, traffic restrictions under the road are kept to a minimum.
[0011]
The method for constructing a bridge according to claim 3 is the method for constructing a bridge according to claim 1, wherein a rod is connected to the divided body, and the rod is raised or lowered by an elevating device, whereby the rod is inserted through the rod. The division body is developed by applying an upward or downward force to the division body.
[0012]
In the present invention, the divided body to be deployed and the lifting device are connected by a rod, and the lifting device is raised or lowered to apply an upward or downward force to the divided body via the rod. Since it expand | deploys, a division body can be expand | deployed more easily than the case where heavy machines, such as a crane, are used.
[0013]
The method for constructing a bridge according to claim 4 is the method for constructing a bridge according to claim 2, wherein the other divided body is also divided in the direction of the bridge axis, and the substructure is divided into the superstructure. After installing on the pier, it is developed in order from one end of the superstructure.
[0014]
In the present invention, the divided body to be developed is also divided in the direction of the bridge axis, and by expanding these small divided parts in order from one end of the superstructure, the number of development work itself is increased, but one time the development work This will help reduce the labor required to improve workability.
[0015]
The construction method of the bridge according to claim 5 is a structure in which an upper work to be installed along the main girder is divided into a plurality of parts in a direction intersecting the bridge axis and these divided bodies are connected and folded together. The superstructure is arranged under the main girder in a state in which the plurality of divided bodies are folded, and then the divided bodies are expanded and then fixed to the main girder.
[0016]
In the present invention, by installing the upper work on the pier in a state where the width is reduced by folding the upper work, the area where traffic other than the road and entry of humans other than workers should be restricted is narrow. As a result, traffic restrictions under the road are kept to a minimum.
[0017]
  The superstructure of the bridge according to claim 6, wherein the superstructure is composed of a plurality of divided bodies divided in a direction intersecting the bridge axis,The split body installed on the pier in a folded state can be deployed in a direction protruding from the superstructure in the width direction of the road.The divided bodies are connected so that they can be folded together.NoIt is characterized by that.
[0018]
In the superstructure of the present invention, the construction on the pier can be performed in a state where the width is narrowed by folding the superstructure, so that the area under which traffic other than workers and entry of people other than workers should be restricted Narrows and traffic restrictions under the road are kept to a minimum.
[0019]
  The superstructure of the bridge according to claim 7 is the structure according to claim 6.BridgeIn the superstructure, the divided body is provided with a unit-type scaffold.
[0020]
In the present invention, the division body is provided with a unit-type scaffolding, so that after the division body is deployed, the scaffold is quickly deployed, and the division body is fixed, etc. The road traffic regulation is kept to a minimum. The scaffold can also be used for future maintenance and inspections, in which case road traffic restrictions are kept to a minimum.
[0021]
  The superstructure of the bridge according to claim 8 is the claim6The bridge superstructure described above is characterized in that the divided bodies are connected by a pin structure.
[0022]
In the present invention, by adopting pin connection for connection between the divided bodies, it becomes easy to perform operations such as folding or unfolding the upper work. Moreover, the fall of each divided body is avoided.
[0023]
  The bridge superstructure according to claim 9 is the structure according to claim 8.BridgeIn the superstructure, the pin structureIsInstalled on both of the divided bodies connected to each other by the pin structure.,A holder having a pin hole, a connecting plate having at least two pin holes, and a pin that is inserted into the pin hole of the holder and the connecting plate so that the connecting plate connects both the holders to be rotatable. It is characterized by comprising.
[0024]
  In the present invention, by adopting a 2-pin type pin connection for pin connection,tatamiIn this state, the divided bodies can be connected in a compact manner.
[0025]
  The superstructure of the bridge according to claim 10 isItem 6In the bridge superstructure described in the above, a force is applied to the other divided body from one of the plurality of divided bodies that are connected adjacent to each other to expand the other divided body.DriveA portion is provided.
[0026]
In the present invention, by providing a drive unit that applies a force from one divided body to the other divided body to deploy the other divided body, the divided body can be used without using a large facility such as a crane. Since deployment work can be performed, the troublesome work of using large equipment is eliminated.
[0027]
  The superstructure of the bridge according to claim 11 is the claim10DescribedBridgeIn the superstructure, the drive unit is detachable.
[0028]
In the present invention, by making the drive unit detachable, it is possible to use it at a plurality of work locations, and it is not necessary to provide the drive units individually for all the divided bodies.
[0029]
The superstructure of a bridge according to claim 12, comprising: a main girder, a bracket attached to at least one side on the left and right sides of the main girder in the direction of the bridge axis, and a main girder of the bracket. It consists of a vertical girder mounted on the opposite side to the vertical axis so as to be rotatable.
[0030]
In the present invention, since the axis that folds the bracket and the stringer into the main beam is in the vertical direction, the gravity acting on the bracket and the stringer is not involved in the folding, and the force required to deploy the bracket and the stringer is extremely small. That's it.
[0031]
DETAILED DESCRIPTION OF THE INVENTION
  A first embodiment according to the present invention is shown in FIGS.8,Figure17 orThis will be described with reference to FIG.
  FIG. 1 shows an example of a bridge constructed at an intersection or level crossing of a highway with a high traffic volume. The bridge shown in FIG. 1 is constructed in the center of one main road so as to straddle the intersection and railroad crossing with the other road, and the bridge pier 1 standing on the separation zone A provided in the center of the road A main girder 2 erected along the main road on the pier 1 and a cross girder 3 installed so as to protrude from both sides of the main girder 2 in the width direction of the main road (direction perpendicular to the bridge axis); The vertical girder 4 installed in parallel with the main girder 2 at both ends of the horizontal girder 3, and the main girder on the main girder 2 and the horizontal girder 32Like the floor slab 5 laid along the main road, the ground cover 6 constructed on both sides of the floor slab 5, the balustrade 7 erected on the ground cover 6, and the ground cover 6 on both sides And pavement 8 laid so as to be buried. The main girder 2 has a box girder structure, and the horizontal girder 3 and the vertical girder 4 have a girder structure.
[0032]
Among the elements constituting the bridge, the main girder 2, the horizontal girder 3, the vertical girder 4 and the floor slab 5 are unitized as a bridge unit (superstructure) 10 in a portion constructed between the adjacent piers 1 and 1. Yes. The horizontal girder 3 has a structure in which both end portions 3B and 3C protruding from the main girder 2 in the width direction of the road with respect to the central portion 3A integrated with the main girder 2 can be folded and unfolded. As a result, the bridge unit 10 includes a central divided body 10A composed of the central part 3A of the main girder 2 and the horizontal girder 3 and a floor slab 5A laid thereon, one end part 3B of the horizontal girder 3 and its One side divided body 10B composed of the floor slab 5B laid on the upper side, the other end 3C of the cross beam 3 and the other side division composed of the floor slab 5C laid on the upper side The body 10C is largely divided into the above three.
[0033]
The divided bodies 10B and 10C are further divided into three in the bridge axis direction (see FIG. 4: hereinafter, these are referred to as small divided bodies 10B1 to 10B3 and small divided bodies 10C1 to 10C3).
[0034]
The respective divided bodies 10A, 10B (small divided bodies 10B1 to 10B3), 10C (small divided bodies 10C1 to 10C3) are connected by pin connecting portions 11 provided between the respective portions of the cross beam 3, and thereby divided on both sides. Both of the bodies 10B and 10C have a structure that can be folded over the central divided body 10A. As shown in FIG. 2, the pin connecting portion 11 includes a holder 12 installed on a side edge adjacent to the divided body 10B (or 10C) of the floor slab 5A constituting the divided body 10A, and the divided body 10B (or 10C). ) Of the floor slab 5B (or 5C) that constitutes) with a holder 13 installed on the side edge adjacent to the divided body 10A, and a pin (actually fastened with a pin / nut) across both holders 12 and 13 This is a two-pin type pin connecting portion composed of two connecting plates 15 that are rotatably connected.
[0035]
  The holders 12 and 13 are both welded or bolted to each divided body. The tip 12a of the holder 12 is formed in a semicircular shape with a radius R centering on the hole 16 through which the pin 14 is inserted, and the tip 13a of the holder 13 is also radius R around the hole 16 through which the pin 14 is inserted. It is formed in a semicircular shape. The connecting plate 15 has a distance 2R between the two holes 17 and 17 through which the pins 14 are inserted. When the holders 12 and 13 are connected by the connecting plate 15, the tips 12a and 13a are connected to each other. It has a structure that touches. In addition, if the holes 16 and 17 are long holes, a curved bridge can be handled. The connecting plate 15 is,holeIf the holders 12 and 13 can be rotatably connected by the pins 14 with the pins 14, the shape of the plate is not necessarily required. Furthermore, the pin 14 and the connecting plate 15 may be integrated, or a single connecting plate 15 may be sandwiched between the holders 12 and 13.
[0036]
  Moreover, as shown in FIG. 17, a part of the upper surface of both holders 12 and 13 is a plane,Center3A,edgePart of the side surface of the 3B coupling surface sideCenter3A,edgeIf the plane coincides with the bonding surface of 3B, the upper surface of the holder or the flat portions of the side surfaces are in contact with each other in both the folded state and the unfolded state, so that the stability is high.
[0037]
  Furthermore, as shown in FIG. 18, a part of the connecting plate 15 and a part of the holder 12 and the holder 13 are moved during deployment.At the hook KBy adopting the engaging structure, it is possible to prevent the deviation of the coupling of the divided bodies due to the play provided on the divided contact surface in order to avoid interference when the divided bodies are deployed after the divided bodies are deployed.
[0038]
  Furthermore, as shown in FIG. 19, if the tip of both holders 12 and 13 is geared into a gear shape and the tooth portions are in contact with each other,edgeSince 3B does not slide in an unintended direction, safety is high.
[0039]
  Furthermore, as shown in FIG.Center3A,edgeBy matching the 3B coupling surface and its extension, the pin connection portion can be made into a 1-pin type having a simpler structure than the 2-pin type.
[0040]
  Furthermore, a rail-type connection shown in FIG. 21 can also be used as a type of pin connection. in this way,CenterIn 3ACenter3A,edgeInstall the semicircular rail R so that it has a center on the 3B coupling surface and its extension,edgeA slider S that fits with the rail R is installed on 3B.edgeWhen deploying 3B,edgeWhen the slider S installed on 3B slides on the rail R,edge3B can be rotated and unfolded. In this connection method,edgeSince the deployment trajectory of 3B can be set arbitrarily,Center3A,edgeThe case where the 3B coupling surface is a curve can also be handled.
[0041]
  Next, the construction method of the bridge unit 10 will be described with reference to FIGS.
First, when the existing part of the bridge reaches one pier 1 with the adjacent piers 1 and 1 between, as shown in FIG. 3 (a), ascending and descending roads passing through both sides of the piers 1 and 1 Central for bothofRestrict the lanes (2) and (3) near the separation zone A to secure a working space. Then, as shown in FIG. 4A, the bridge unit 10 is sent from the existing bridge B between the piers 1 and 1. At this time, both of the divided bodies 10B and 10C on both sides are folded on the central divided body 10A.
[0042]
  When the bridge unit 10 is installed between the piers 1 and 1, the divided body 10 </ b> A is fixed to the pier 1. Next, after restricting lanes (1) and (4) and expanding the work space, as shown in FIG.ofThe crane C is moved to the tip of the bridge B, and the existing part of the folded divided body 10B is installed.ofThe small divided body 10B1 closest to the bridge B is hung, and the small divided body 10B1 is lifted and swung sideways to be developed. At this time, the wire rope W for hanging is previously provided inside the stringer 4 as shown in FIG.Hanging metalIngredient 18, orHanging metalInstall through the shackle 19 connected to the tool 18. If the wire rope W is passed through the shackle 19, interference between the wire rope W and the small divided body 10B1 can be avoided, so that the construction can be performed safely. If necessary, in order to prevent the wire rope W from damaging the stringer 4 during the unfolding process,Hanging metalThe tool 18 may be cured with rubber or the like. Moreover, the hanging metal fitting 18 can be removed after construction by using bolts, and can be used for developing other small divided bodies.
[0043]
When the small divided body 10B1 is deployed, as shown in FIG. 3 (b), an operator on the aerial work vehicle D arranged below the bridge unit 10 loosens the sling and uses a splice plate P or the like for the divided body 10A. Work to fix the small divided body 10B1.
While the worker is fixing the small divided body 10B1, this time the existing one of the divided bodies 10C is installed.ofIt hangs on the small divided body 10C1 closest to the bridge B and develops in the same manner as described above. When the small divided body 10C1 is expanded, the worker who has finished fixing the small divided body 10B1 disengages the small divided body 10C1 and fixes the small divided body 10C1 to the divided body 10A.
[0044]
While the worker is fixing the small divided body 10C1, as shown in FIG. 4C, the divided body 10A in which the floor slab 5 is exposed by unfolding the small divided bodies 10B1 and 10C1. The crane C is moved forward, and the small divided bodies 10B2 and 10C2 and further the small divided bodies 10B3 and 10C3 are sequentially deployed and fixed in the same manner as described above.
[0045]
When all the divided bodies 10B and 10C are deployed and the fixing work is completed, as shown in FIG. 3C, all the lane restrictions are released, and the pin connecting portion 11 is removed and the bridge unit is deployed. The ground cover 6, the balustrade 7 and the pavement 8 are sequentially constructed on the top 10.
[0046]
In the conventional construction, a support work is assembled between the piers 1 and 1, a main girder and a horizontal girder are arranged on the assembled support work, a floor slab is laid, and the ground cover 6, the balustrade 7 and the pavement 8 are installed. Work such as sequential construction was common, and road regulation and lane regulation were necessary during the entire period from assembly of support works to completion of the bridge. However, by proceeding with the erection work as described above as a unit in which a part of the superstructure can be folded / expanded, the road regulation period can be minimized during the bridge erection work between the piers 1 and 1. It is more effective if you go in the low traffic hours such as midnight.
[0047]
Moreover, although the divided bodies 10B and 10C to be expanded are further divided into small divided bodies 10B1 to 10B3 and 10C1 to 10C3, the number of operations by the crane C is increased, but the weight of the divided body to be lifted is light, so that the crane C Even the bridge unit 10 that is small in size and difficult to secure a work space can be safely operated.
[0048]
Furthermore, by adopting the pin connecting portion 11 for connecting the respective divided bodies, the structure of folding / unfolding is very simple, and in the process of developing the small divided body, the pin connecting portion 11 Since the tips 12a and 13a of the holders 12 and 13 are in contact with each other, a part of the weight of the small divided body 10B1 is supported by the divided body 10A via the holders 12 and 13, and the load on the crane C is reduced. Work is possible even with relatively small cranes. Therefore, reinforcement of the girder in the space where the crane is installed can be omitted, and work can be performed smoothly, so that workability can be improved. Further, since the divided bodies 10B and 10C are connected to the divided body 10A with pins, there is no fear that the divided bodies 10B and 10C will drop, and the safety is improved.
[0049]
  In this embodiment, the aerial work vehicle D is disposed below the bridge unit 10 to perform the slinging work and the fixing work of the small divided body. However, a work scaffold is attached to the small divided body in advance. The above work may be performed on this scaffold. In this case, as shown in FIG. 22, the divided bodies 10B and 10C are made of a single pipe.ofOne end of the frame 171 is rotatably joined with a pin 172, and a scaffolding plate 173 is joined to the other end of the frame 171 with a pin. Further, a morning glory 174 is provided at the end of the scaffold plate 173 to prevent the fall. Instead of morning glory, a two-stage handrail with a single tube may be installed.
[0050]
  At the time of installation on the bridge pier of the superstructure and after completion of the bridge construction, the scaffold 170 is stored by being folded around the floor board side by rotating around the pin 172. At the time of maintenance / inspection after deployment of the divided body at the time of construction and after construction of the bridge, the folded frame 171 and scaffolding plate 173 are deployed with the pin 172 as the rotation axis,ofA scaffold 170 is formed. workofAfter the scaffolding is deployed, the rotating parts are fixed to ensure work safety. The worker rides on the deployed scaffold 170 and fixes the divided body with the attachment plate, and performs maintenance and inspection work.
[0051]
Therefore, after the divided body is deployed, the scaffold 170 is quickly deployed, and the work such as fixing the divided body is performed. After the work is completed, the scaffold 170 is quickly stored, so that traffic restrictions on the road are minimized. To be held in. In addition, the scaffold 170 can be used for future maintenance and inspections, and in this case, road traffic restrictions are kept to a minimum.
[0052]
  In the present embodiment, the divided bodies 10B and 10C are further divided into small divided bodies 10B1 to 10B3 and 10C1 to 10C3. However, when a sufficient work space can be secured on the bridge unit 10, the small divided bodies 10B1 to 10B1 are separated. Without providing 10B3 and 10C1 to 10C3, the divided bodies 10B and 10C may be lifted and deployed as they are. In this case, as shown in FIG.ofIt is realistic to arrange the cranes C on the bridge B and lift the divided bodies 10B and 10C in cooperation with the two. In this way, the number of operations by the crane C is drastically reduced, so that the operation time can be shortened, and as a result, the road regulation time can be further shortened.
[0053]
Further, as shown in FIG. 23, the adjacent small divided bodies of the small divided bodies 10B1 to 10B3 and 10C1 to 10C3 are made of an elastic material such as rubber, or a U-shaped or U-shaped piece made of a combination of an elastic material and a rigid member. You may connect with the character-shaped damper 181. FIG.
[0054]
In this case, when the small divided body 10B1 is caused by a crane or the like, the small divided body 10B1 and the small divided body 10B2 adjacent to each other are connected by the small divided body 10B1 and the damper 181. Therefore, the small divided body 10B1 is connected via the damper 181. Caused late. Normally, the small divided body 10B1 tries to expand vigorously by its own weight when the opening angle becomes 90 degrees or more, but due to the connection by the damper 181, the force to expand the small divided body 10B1 is small. It is converted into a force that causes the body 10B2. Therefore, the small divided body 10B1 does not expand vigorously even when the opening angle becomes 90 degrees or more. Further, the small divided body 10B2 can be expanded even if the applied force is small. Furthermore, since the small divided bodies connected by the damper 181 are developed in a chain, only one small divided body needs to be applied with a large force by a crane or the like, and the workability is good. Furthermore, if the opening of the small divided body is a mechanism in which the opening angle is locked every 90 degrees, the development chain of the small divided body can be controlled, so that the safety is high.
[0055]
In this embodiment, the widths of the divided bodies 10B and 10C are substantially half of the divided body 10A, and when the divided bodies 10B and 10C are folded, the floor slabs face each other substantially in parallel. In order to make it larger, the widths of the divided bodies 10B and 10C may be made longer than half of the divided bodies 10A. In this case, as shown in FIG. 7, when the divided bodies 10B and 10C are folded, the ends of the divided bodies 10B and 10C abut against each other and are arranged in a mountain shape.
[0056]
In the present embodiment, the bridge unit 10 has a structure in which the main girder 2 having a box girder structure and the vertical girder 4 having a girder structure are combined, but the structure of the girder is not limited thereto. For example, as shown in FIG. 8 (a), all the girders 2 and 4 may have a girder structure, and as shown in FIG. 8 (b), all the girders 2 and 4 may have a box girder structure.
[0057]
Next, a second embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the component already demonstrated in the said embodiment, and description is abbreviate | omitted.
As shown in FIG. 9, the bridge unit 20 of the present embodiment connects the three main girders 21A, 21B, and 21C arranged in the bridge axis direction and the three main girders 21A, 21B, and 21C. It comprises a cross girder 22 arranged in a direction perpendicular to the bridge axis, main girder 21A, 21B, 21C and a floor slab 23 laid on the cross girder 22. As in the first embodiment, the cross beam 22 is connected to the central portion 22B integrated with the main beam 21B with respect to one end 22A integrated with the main beam 21A, and further to the main beam 21C. The other end 22C integrated can be folded or unfolded. As a result, the bridge unit 20 is composed of one side 22A composed of one end 22A of the main girder 21A and the horizontal girder 22 and a floor slab 23A laid thereon, the main girder 21B and the cross girder 22. A central divided body 20B composed of a central portion 22B and a floor slab 23B laid on the upper portion thereof, a main girder 21C, the other end 22C of the main girder 22 and a floor slab 23C laid on the upper portion thereof. The other side divided body 20C is divided into the above three parts.
[0058]
Each divided body 20 </ b> A, 20 </ b> B, 20 </ b> C is connected by a pin connecting portion 11 provided between each portion of the cross beam 3. The pin connection portion 11 between the divided bodies 20A and 20B is provided on the upper surface side of the cross beam 3, and the pin connection portion 11 between the divided bodies 20B and 20C is provided on the lower surface side of the horizontal beam 3, respectively. The body 20B is folded so as to be superimposed on one side divided body 20A, and the other side divided body 20C is folded so as to be superimposed on the central divided body 20B folded on the divided body 20A ( (See FIG. 2 for the structure of the pin connecting portion 11).
[0059]
Next, the construction method of the bridge unit 20 will be described with reference to FIG.
First, as shown in FIG. 10 (a), the work space is secured by regulating either the up line or the down line (lanes (1), (2)) of the road passing through both sides of the piers 1 and 1. After that, the bridge unit 20 is sent out between the piers 1 and 1 from an existing bridge (not shown). At this time, both the divided bodies 20B and 20C are folded on the divided body 20A.
[0060]
  When the bridge unit 20 is installed between the piers 1 and 1, the divided body 20 </ b> A is fixed to the pier 1. Next, after restricting lanes (3) and (4) and expanding the work space,ofThe divided bodies 20B and 20C are developed at once using a crane (not shown) arranged on the bridge. As shown in FIG. 10 (b), the end of the divided body 20C is hung, and not only the divided body 20C but also the divided body 20B is lifted, and is expanded to the side so as to open the bellows.
[0061]
When the divided bodies 20B and 20C are deployed, an operator on an aerial work vehicle (not shown) disposed below the bridge unit 20 throws the sling and uses the splice plate or the like to the divided body 20A. Do the fixing work.
[0062]
When all the divided bodies 20B and 20C are expanded and the fixing work is completed, as shown in FIG. 10C, all the lane restrictions are released, and the ground cover 6 and the rail 7 are placed on the expanded bridge unit 20. Then, pavement 8 will be constructed sequentially.
[0063]
  Also according to the present embodiment, the road regulation period is minimized during the bridge construction work between the piers 1 and 1 by proceeding with the construction work as described above as a unit in which a part of the superstructure can be folded / expanded. Can do.
In this embodiment, the bridge unit 20 has a box girder structure.WhatHowever, instead of this, a girder structure may be used.
[0064]
Next, a third embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the component already demonstrated in the said embodiment, and description is abbreviate | omitted.
In the present embodiment, for a so-called T-type pier 30 in which a cross beam 31 as a bridge superstructure is integrated with a pier 32, the cross beam 31 is divided into three in the length direction. The end portions 31B and 31C protruding in the width direction of the road with respect to the central portion 31A integrated with the upper end of the pier 32 can be folded and unfolded.
[0065]
More specifically, the cross beam 31 is connected by the pin connecting portion 11 provided between the above-described portions, and thereby both end portions 31B and 31C are folded so as to overlap each other on the central portion 31A. (See FIG. 2 for the structure of the pin connecting portion 11).
[0066]
  Next, the construction method of the T-type pier 30 will be described.
First, the center of both the up and down roads that pass through both sides of the piers 1 and 1ofAfter restricting the lanes (2) and (3) close to the separation zone A, the work space is secured and the T-type pier 30 is placed in the center.ofSet up in separation zone A. At this time, both end portions 31B and 31C are folded on the central portion 31A.
[0067]
Once the T-type pier 30 is erected, the restriction on the lane (3) is released, and the lane (2) and the separation zone A are used as a work space, and then the end using a crane (not shown) placed in this work space. Part 31B is expanded. In addition, since the operation | work which expand | deploys the edge part 31B can be implemented with a comparatively small crane, regulation of lane (1) is unnecessary.
[0068]
When the end 31B is unfolded, an operator on an aerial work vehicle (not shown) arranged in the work space as with the crane disengages the sling and performs the work of fixing the end 31B to the central portion 31A.
[0069]
When the end portion 31B is expanded and the fixing work is finished, the restriction of the lane (2) is canceled and the lane (3) is restricted, and the lane (3) and the separation zone A are set as a work space. The crane is moved to the end to expand the end 31C.
[0070]
  When the end 31C is unfolded, an operator on an aerial work vehicle arranged in the work space as in the crane disengages the sling and attaches the end 31 to the center 31A.CWork to fix.
[0071]
When the end portion 31C is expanded and the fixing work is completed, the T-type pier 30 is completed. Therefore, all the lane restrictions are released, and then the superstructure is constructed on the T-type pier 30.
[0072]
Also according to the present embodiment, the road beam 31 and the number of lane restrictions are minimized during the installation work of the T-type pier 30 by proceeding as described above with the structure in which the cross beam 31 as the superstructure can be folded / expanded. Can be suppressed.
[0073]
Next, a fourth embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the component already demonstrated in the said embodiment, and description is abbreviate | omitted.
In the T-type pier 30 ′ of the present embodiment, the cross beam 33 is divided into three in the length direction, but is the same as the third embodiment, but the central portion 33 </ b> A integrated with the upper end of the pier 32. Both end portions 33B and 33C protruding in the width direction of the road are supported so as to hang down from the central portion 33A, and are folded in the suspended state (in this state, the central portion 33A is bridged. 32, it can be expressed that both ends 33B and 33C are supported so as to hang down from the upper end of the pier 32).
[0074]
Also according to the present embodiment, by adopting the same work procedure as that of the third embodiment as a structure in which the cross beam 33 as the superstructure can be folded / expanded, the road regulation period and the lane are set during the installation work of the T-type pier 30 ′. The number of regulations can be minimized. In addition, also when center part 33A is an independent superstructure which is not integrated with a bridge pier, about the installation of superstructure, the same work procedure as 1st embodiment is followed, and the superstructure of this embodiment is developed. It can be performed.
[0075]
Next, a fifth embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the component already demonstrated in the said embodiment, and description is abbreviate | omitted.
In the T-type pier 30 ″ of the present embodiment, the cross beam 34 is divided into five in the length direction. Then, with respect to the central portion 34A integrated with the upper end of the pier 32, end portions 34B and 34C projecting to one side in the width direction of the road and end portions 34D and 34E projecting to the other side in the width direction of the road are folded. It has a structure that can be rolled out.
[0076]
This embodiment is different from the third and fourth embodiments in the folding direction, not the number of divided bodies. More specifically, the cross beam 34 has a structure in which one end portions 34B and 34C are folded not to be on the central portion 34A but to be overlapped in the bridge axis direction (the same applies to the other end portions 34D and 34E).
[0077]
Next, a method for constructing the T-type pier 30 ″ will be described.
First, the T-shaped pier 30 ″ is erected on the central separation zone A. At this time, one end portions 34B and 34C and the other end portions 34D and 34E are both folded in front of and behind the center portion 34A.
[0078]
Once the T-shaped pier 30 ″ is erected, the lane (1) is restricted, the lane (2) and the separation zone A are used as work spaces, and the end is placed using a crane (not shown) placed in this work space. The parts 34B and 34C are expanded so as to be pulled out to the side.
[0079]
When the end portions 34B and 34C are deployed, a worker on an aerial work vehicle (not shown) arranged in the work space as with the crane loosens the sling and fixes the end 34B to the central portion 34A, and further the end portions 34B and 34C. Work to fix each other.
[0080]
After the end portions 34B and 34C are expanded and the fixing work is finished, the restriction of the lane (2) is canceled and the lane (3) is restricted, and the lane (3) and the separation zone A are used as a work space. The cranes are moved to the work space to expand the end portions 34D and 34E.
[0081]
When the end portions 34D and 34E are deployed, a worker on an aerial work platform arranged in the work space as in the crane disengages the sling, fixes the end portion 34D to the central portion 34A, and further fixes the end portions 34D and 34E to each other. Work to do.
[0082]
When the ends 34D and 34E are deployed and the fixing work is completed, the T-type pier 30 ″ is completed. Therefore, all lane restrictions are released, and then the superstructure is installed on the T-type pier 30 ″. To do.
[0083]
Also according to the present embodiment, the cross beam 34 as the superstructure can be folded / expanded to proceed as described above, thereby minimizing the road regulation period and the number of lane restrictions during the installation work of the T-type pier 30 ″. To the limit. Further, in the present embodiment, the end portions 34B and 34C and the end portions 34D and 34E are expanded in the horizontal direction in a state where the pier is erected, and thus the T-type pier 30 in the third embodiment. In addition, unlike the T-type pier 30 'in the fourth embodiment, it is not necessary to move the end portion against gravity. Therefore, construction is possible with a smaller crane than in the previous embodiment, which contributes to smooth work.
[0084]
Next, a sixth embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the component already demonstrated in the said embodiment, and description is abbreviate | omitted.
In this embodiment, for a so-called portal pier 40 in which a cross beam 41 as a bridge superstructure is integrated with two bridge piers 42 and 42 that are separated in the width direction of the road, the cross beam 41 is divided into four in the length direction. Has been. And while constituting the pier half body 40A of the structure which can fold and expand the central division body 41B which should be arranged near the center of the road with respect to the end division body 41A integrated at the upper end of one pier 42, A pier half body 40B having a structure in which a central divided body 41D to be arranged near the center of the road can be folded or unfolded with respect to the end divided body 41C integrated with the upper end of the other pier 42 is constructed. At the stage of installation, these two halves are joined to complete the portal pier 40.
[0085]
  The end divided body 41A and the central divided body 41B arranged on one side, and the end divided body 41C and the central divided body 41D arranged on the other side are both connected by a pin connecting portion 11 provided therebetween. Thus, the central divided body 41B is placed on the end divided body 41A, and the central divided body 41D isedgeThe structure is such that it can be folded over the divided body 41C (see FIG. 2 for the structure of the pin connecting portion 11).
[0086]
  Next, the construction method of the gate-type pier 40 will be described.
First, the center of both the up and down roads that pass through both sides of the piers 1 and 1ofThe roadside across the road after restricting the lanes (1) and (4) far from the separation zone to secure work spaceIn the beltThe pier half bodies 40A and 40B are erected respectively. At this time, the central divided bodies 41B and 41D are folded on the end divided bodies 41A and 41C, respectively.
[0087]
Once the pier halves 40A and 40B are erected, the restriction on the lane (4) is canceled and the lane (2) is restricted, and the two-lane down line (▲ 3 ▼, (4)) is used as the two-way traffic and the up line The lanes (1) and (2) are used as work spaces, and the central divided body 41B is developed using a crane (not shown) arranged in the work spaces.
[0088]
  CenterWhen the divided body 41B is deployed, an operator on an aerial work vehicle (not shown) arranged in the work space as in the crane disengages the sling and performs the work of fixing the central divided body 41B to the end divided body 41A.
[0089]
When the central divided body 41B is deployed and the fixing work is completed, the restriction of the lanes (1) and (2) is canceled and the lanes (3) and (4) are restricted, and the original two-lane up line ((1) , ▲ 2 ▼) as a two-way traffic, securing the up line and down line, and setting the lanes ▲ 3 ▼, ▲ 4 ▼ as work space, moving the crane to this work space and deploying the central divided body 41D To do.
[0090]
When the central divided body 41D is deployed, an operator on an aerial work vehicle arranged in the work space as in the crane disengages the sling and fixes the central divided body 41D to the end divided body 41C.
[0091]
When the center divided body 41D is expanded and the fixing work is finished, the center divided bodies 41B and 41D are fixed to each other. At this time, since a gap is provided between the central divided bodies 41B and 41D in anticipation of interference when both are deployed, the mini-block 43 is inserted into the gap to fill the gap, and the horizontal block with the mini-block 43 as a part. 41 is integrated. When the central divided bodies 41B and 41D are fixed to each other, the gate-type pier 40 is completed. Therefore, all the lane restrictions are released, and then the superstructure is constructed on the gate-type pier 40.
[0092]
  Also according to the present embodiment, the road regulation period can be minimized during the installation work of the gate-type pier 40 by advancing the work as described above as a structure in which the cross beam 41 as the superstructure can be folded / expanded. .
In addition, by making the holes 16 and 17 of the pin connecting portion into long holes, the pin can be slid by the margin of the holes, and the mini block 43 can be omitted. Also, the central divided bodies 41B and 41D are arranged on one sideZHowever, there is a risk of bending the column base and falling the column.NoTheSukoYou can.
[0093]
Next, a seventh embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the component already demonstrated in the said embodiment, and description is abbreviate | omitted.
In the present embodiment, a lower bridge unit 50 that constitutes a lower bridge as a bridge superstructure (for example, a pony truss or the like, which is used when a double road surface is configured by installing under a main girder of an upper bridge (not shown)). , A girder structure 52 composed of a main girder and a horizontal beam installed between lower ends of truss-like hanging members 51, 51 suspended from the main girder of the upper bridge is divided into two in the width direction of the road. And these division bodies 52A and 52B have a structure which can be mutually folded and expand | deployed. Furthermore, one divided body 52A can be folded or expanded with respect to one hanging member 51, and the other divided body 52B can be folded or expanded with respect to the other hanging member 51. .
[0094]
  The divided bodies 52A and 52B, one hanging member 51 and the divided body 52A, and the other hanging member 51 and the divided body 52B are all connected by the pin connecting portion 11 provided between them, thereby two hanging members. Girder structure 5 folded between 51 and 512(See FIG. 2 for the structure of the pin connecting portion 11).
[0095]
In the lower bridge unit 50 configured as described above, the one assembled at the factory or a temporary assembly yard provided separately is folded and downsized so as to be within the legal restrictions, Transport using means of transport. At the site, the folded lower bridge unit 50 is lowered to the work yard and deployed using a crane or the like, and the pin connecting portion 11 is rigidly joined and then installed under the main girder of the upper bridge.
[0096]
According to the present embodiment, even when the size of the lower bridge exceeds the upper limit of the size of the load defined by the Road Traffic Law, the structure can be folded / expanded as described above, so that It is possible to carry the vehicle without any restrictions, and it is easy to carry it to the site, thereby improving the workability. In addition, since the occupation period of the work yard at the site can be shortened, road traffic restrictions can be suppressed in a short time.
[0097]
Next, an eighth embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the component already demonstrated in the said embodiment, and description is abbreviate | omitted.
In each of the above embodiments, the divided body is expanded by a crane (for example, in the first embodiment, the divided bodies 10B and 10C are lifted and expanded by the crane C). On the other hand, in the present embodiment, a driving device (driving unit) 60 that causes the bridge unit 10 to deploy by applying a force to the divided body 10B (10C) to be developed from the non-moving divided body 10A during deployment. Is provided.
[0098]
On the divided body 10A, a drive shaft 61 disposed at a center position when the divided body 10B (10C) is turned is rotatably supported by bearing portions 62 and 62. One end of the drive shaft 61 is fixed to the divided body 10B (10C) via the bracket 61a. When the other end of the drive shaft 61 is rotated to one side, the folded divided body 10B (10C) is moved to the drive shaft 61. It turns around. The drive device 60 includes a drive shaft 61 that is rotatably supported by the divided body 10 </ b> A, a drive unit 63 that rotates the drive shaft 61, and a gear unit 64 that amplifies the torque of the drive unit 63. As a drive source built in the drive unit 63, an electric motor, a hydraulic motor, or the like is employed. Further, although the drive shaft 61 cannot be removed, the drive unit 63 and the gear unit 64 are both detachably installed on the divided body 10A, and the weight of each unit is kept so that it can be carried by an operator (about 30 to 40 kg). It has been.
[0099]
In the bridge unit 10 including the drive device 60 configured as described above, when the division body 10B is expanded, the drive unit 63 is driven to rotate the division body 10B around the drive shaft 61 for expansion. When the unfolding operation is completed, the drive unit 63 and the gear unit 64 are detached from the divided body 10A, and then attached to the divided body 10C to be withdrawn to perform the unfolding operation.
[0100]
Further, as the drive unit 63, a rotary actuator using a hydraulic motor as a power source can be used. In this case, since a large torque can be generated by hydraulic pressure, a separate reduction gear (gear unit 64) can be used if the rotation axis for rotating and deploying the divided body 10B (10C) coincides with the rotation axis of the actuator. The divided body can be driven directly.
[0101]
As another driving device 60, there is a pantograph damper type driving device shown in FIG. A pantograph 161 having a damper function is provided by connecting the divided body 10A and the divided body 10B (10C) to the surfaces of the divided body 10A and the divided body 10B (10C) that are overlapped by folding. Furthermore, a jack 162 for pushing (or pulling) the pantograph from the side is installed in the divided body 10A.
[0102]
When the bent portion of the pantograph is pushed (or pulled) from the side by a jack, the pantograph extends in the vertical direction and gradually pushes up the divided body 10B (10C). Further, when the bent portion of the pantograph 161 is pushed (or pulled) from the side by the jack 162 and the opening of the divided body 10B (10C) exceeds 90 °, the divided body starts to be unfolded by its own weight, but the pantograph 161 is provided. With the damper function, the momentum of deployment is attenuated and the deployment is completed gradually. The damper is set to be effective when the opening of the divided body reaches at least 90 °, since it only serves as a resistance to the expansion of the divided body until the opening of the divided body 10B (10C) exceeds 90 °.
[0103]
In this embodiment, heavy equipment is not required for the development of the divided body, and the equipment is lightweight, so that construction can be performed with minimum traffic restrictions, and reinforcement for the superstructure for using heavy equipment is also unnecessary. In addition, it is quieter and more environmentally friendly than deploying with heavy machinery such as cranes, so it can be used for night construction.
[0104]
Further, as another driving device, there is a pneumatic driving device shown in FIG. In the present embodiment, an extendable flexible duct 163 that lifts up the divided body 10B (10C) is installed in the gap between the divided body 10A and the divided body 10B (10C) folded at the pin connecting portion. Both ends of the flexible duct are in contact with both adjacent surfaces of the folded divided bodies 10A and 10B (10C). The flexible duct 163 is connected to a friction blower 165 that generates compressed air via a flexible hose 164 for transferring compressed air. Further, a hydraulic damper 166 is installed in the divided body 10A so as to contact the divided body 10B and prevent rapid expansion of the divided body.
[0105]
  The compressed air generated by the friction blower 165 is sent to the flexible duct 163 via the flexible hose 164. The flexible duct 163 is extended by the compressed air gradually accumulated in the flexible duct 163, and the folded divided body 10B (10C) is gradually pushed up. When the divided body 10B (10C) rises up to 90 degrees, the divided body 10B (10C) tends to fall under its own weight,Par 1Since one end of 66 comes into contact with the divided body 10B (10C) and the force of rapid deployment is attenuated, the divided body develops gently. The hydraulic damperPar 166, a mechanism for exhausting air is provided in at least one of the flexible duct 163, the flexible hose 164, and the friction blower 165, and the damping force thereof is hydraulically damped.Par 166 may be used instead. Further, an air bag may be used instead of the flexible duct 163.
[0106]
In this embodiment, heavy equipment is not required for the development of the divided body, and the equipment is lightweight, so that construction can be performed with minimum traffic restrictions, and reinforcement for the superstructure for using heavy equipment is also unnecessary. Furthermore, the extension of the flexible hose 164 and the flexible duct 163 is easy in structure, and it is easy to cope with an increase in the size of a divided body or an obstacle. Furthermore, at the time of deployment, the friction blower 165 can be collectively managed and can be installed by a small number of people. Furthermore, it is quieter and more environmentally friendly than deploying with heavy machinery such as cranes, so it can be used for night construction.
[0107]
  Further, as another driving device, there is a wire type driving device shown in FIG. In this embodiment, before the installation on the bridge, the superstructure rotates the left and right divided bodies 10B and 10C to the lower side of the divided body 10A around the pin connection portion 11 installed at the lower end of the divided coupling surface. It is folded to do. When the divided bodies 10B and 10C are folded to the lower side of the divided body 10A, the space saving effect by folding is increased, that is, the gravity center of the small divided body 10B (10C) is vertically below the pin connecting portion by its own weight. Alternatively, the divided body 10B (10C) may be fixed so as to be positioned closer to the center of the divided body 10A. The upper end of the split coupling surface of the split body 10B (10C)Ya 167 is attached. WaiYa 167 is installed at the upper end of the split coupling surface of the split body 10A and rotates by itself.Ya 1While changing the direction of 67Ya 1It is wound up by a wire winding unit 169 installed on the divided body 10A through a sheave 168 for feeding 67. The wire winding unit 169 is driven by a hydraulic pump unit installed on the divided body 10A.
[0108]
When the wire take-up unit 169 is driven, the wire 167 is pulled and taken up via the sheave 168, and the divided body 10B (10C) connected to the wire 167 rotates horizontally around the pin coupling portion 11 as the rotation center. get up. Further, instead of the wire winding unit 169, using a link mechanism such as a pantograph, the same effect can be obtained by pulling the wire 167 upward by pulling a part of the wire 167 upward on the divided body 10A. .
[0109]
In this embodiment, heavy equipment is not required for the development of the divided body, and the equipment is lightweight, so that construction can be performed with minimum traffic restrictions, and reinforcement for the superstructure for using heavy equipment is also unnecessary. Furthermore, the extension of the wire 167 and the change of the installation position can be handled by the number of sheaves 168 installed and the like, and it is easy to cope with an increase in the size of the divided body or an obstacle. Furthermore, when the divided body is deployed, it can be collectively managed by the pump unit, and can be constructed by a small number of people. Furthermore, it is quieter and more environmentally friendly than deploying with heavy machinery such as cranes, so it can be used for night construction.
[0110]
  Furthermore, there is a jack type driving device shown in FIG. 27 as another driving device. In this embodiment, the divided body 10B (10C) connected to the divided body 10A and the pin connecting portion 11 is folded on the divided body 10A. Further, a jack 162 that extends and contracts in a direction perpendicular to the bridge axis is installed on the divided body 10A. The mount E is installed on the extension line of the jack 162. In the lower part of the gantry E, a notch is provided for smooth development. Further, a rubber material, a curing material made of wood or the like, a roller, or a rail that meshes with the divided body 10B (10C) is installed at the upper surface end portion of the mount E in contact with the divided body 10B (10C). Further, the divided body 10A includes a hydraulic damper (not shown) that contacts the divided body 10B (10C) and prevents rapid expansion of the divided body.Pais set up.
[0111]
  When the jack 162 is extended, the jack 162 pushes the gantry E in a direction perpendicular to the bridge shaft, and the pushed gantry E bites into the gap between the folded divided bodies 10A and 10B (10C) to widen the gap. Then, the divided body 10B (10C) is gradually pushed up. At this time, since the upper end portion of the gantry E that contacts the divided body 10B (10C) is provided with a rubber material, a curing material such as wood, or a roller, or a rail that meshes with the divided body 10B (10C), the divided body 10B (10C) is divided. There is no fear of damaging the body 10B (10C). When the extension length of the jack 162 is insufficient for the expansion of the divided body 10 </ b> B (10 </ b> C), it can be coped with by appropriately adding a horizontal material (not shown) between the jack 162 and the mount E. When the divided body rises up to 90 degrees, the divided body 10B (10C) tries to fall down due to its own weight.PaOne end comes into contact with the divided body 10B and attenuates the force of rapid deployment, so the divided body develops gently.
[0112]
  Hydraulic DanPaInstead, the stay cable F may be used to attenuate the deployment force. One end of the stay cable F is attached to any part other than the pin coupling part 11 of the divided body 10B (10C), preferably mechanically, on the opposite side of the divided coupling part. The stay cable F passes through a hanging bracket 18 installed at an arbitrary position on the divided body 10A, preferably at a position sufficiently away from the pin connecting portion 11, and winds up a cable (not shown) on the divided body 10A. Connected to the machine. When the jack 162 is extended and the divided body 10B (10C) rises up to 90 degrees, the divided body 10B (10C) tends to fall under its own weight, so the stay cable F is adjusted, and the divided body 10B is rapidly expanded. prevent. Furthermore, a plurality of mounts can be moved simultaneously through a link mechanism in the middle without directly pushing and pulling the mount E with the jack 162. In addition, when moving the gantry E using the link mechanism, the pushing or pulling force in the direction of the bridge axis can be converted into a direction orthogonal to the bridge axis, so that the power source is not only the jack 162 but also the split. A moving carriage on the body A can also be used.
[0113]
Since jacks are used for the development of the divided body, the equipment is lightweight, the workability is good, and the reinforcement to the superstructure is small. Moreover, when using an interlocking jack (link mechanism), collective management is possible and construction can be performed by a small number of people. Furthermore, it is quieter and more environmentally friendly than deploying with heavy machinery such as cranes, so it can be used for night construction.
[0114]
According to the present embodiment, since the divided bodies 10B and 10C can be deployed without using a crane, workability is eliminated by eliminating the troublesome work of using the crane such as crane movement and wire rope slinging work. Can be greatly improved. Further, since the driving device 60 can be used at a plurality of work locations, the equipment cost can be reduced.
[0115]
In the present embodiment, the example in which the driving device 60 is applied to the first embodiment has been described. However, it goes without saying that the driving device 60 can be applied to the unfolded structures in all the second to seventh embodiments. Absent.
[0116]
  Next, a ninth embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the component already demonstrated in the said embodiment, and description is abbreviate | omitted. In the present embodiment, the superstructure is divided into divided bodies 10 </ b> A, 10 </ b> B, and 10 </ b> C in a direction intersecting with the bridge shaft, and each is rotatably connected by the pin connecting portion 11. When installing the superstructure on the bridge pier, the divided bodies 10B and 10C are rotated by the pin connecting portion 11 and folded on the divided body 10A. A rod receiver 192 in which a coupling portion with the rod 191 projects outward from the divided coupling surface is provided on the side opposite to the floor plate of the divided bodies 10B and 10C, that is, the end portion on the divided coupling surface side of the upper surface when folded. . Also, when installing the superstructure on the pier, such as a jack that lifts the superstructure from the ground to above the pierElevatingA beam 194 having a rod receiver is provided on a lifter (not shown) provided with the device 193, and the rod receiver 192 of the superstructure and the rod receiver 192 of the beam 194 have sufficient rigidity to support the weight of the divided body 10B (10C). They are connected by a rod 191 having them. The rod 191 and the rod receiver 192 are coupled to each other using a pin so as to be rotatable.
[0117]
When the lifter is lowered, the rod 191 connected to the beam 194 is pulled downward, and the divided bodies 10B and 10C connected to the rod 191 are deployed while rotating about the pin connecting portion 11 as a rotation axis. At this time, the connecting portion of the rod 191 and the rod receiver 192 has a structure that projects outward from the split connecting surface when the split bodies 10B and 10C are folded, so the rod 191 does not interfere with the split body. Further, since the beam 194 and the divided bodies 10B and 10C are connected by the rod 191, the divided bodies 10B and 10C can be easily deployed at the same time if the beam 194 is lowered while being kept horizontal.
[0118]
  The means for pulling down the rod 191 need not be limited to a lifter. For example, an upper / lowering device may be placed on a car running under the beam and deployed while moving. Furthermore, in this embodiment, the rod 191 is pulled down by a lifter.FormHowever, the rod 191 itself may be provided with an expansion / contraction function without using a lifter. Furthermore, instead of the rod 191YaUsedYaWai as a means to lowerYamakiAlthough a scraper may be used, in this case, it is necessary to provide a damper that prevents rapid deployment of the divided body 10B (10C). Furthermore, depending on the dividing method and folding method of the divided body, not only can the rod 191 be pulled down, but also it can be unfolded by applying force to the divided body by pushing it up.
[0119]
In this embodiment, since the divided bodies 10B and 10C can be simultaneously deployed, the center of gravity of the upper work on the pier is not biased left and right, and the divided body can be stably deployed. Moreover, if the lifter for installing the superstructure necessary for construction on the bridge pier is used as the rod lifting means, the time required for expanding the divided body can be reduced and the construction can be completed quickly.
[0120]
Next, a tenth embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the component already demonstrated in the said embodiment, and description is abbreviate | omitted. In the present embodiment, the bracket 202 is attached to the left and right at least one side of the main girder 201 in the bridge axis direction so as to be rotatable around the vertical axis. A vertical girder 203 is attached to the end of the bracket opposite to the main girder so as to be rotatable about a vertical axis. By setting the number of brackets to at least two places on one side, the main beam 201 and the vertical beam 203 form a parallel link, which is preferable from the viewpoint of stability.
[0121]
With the above structure, the vertical beam 203 and the bracket 202 can be folded so that the vertical beam 203 is brought close to the main beam 201 when the superstructure is installed on the bridge pier. In addition, unlike other embodiments, the gravity acting on the bracket 202 and the stringer 203 is not involved in the folding, and the force required for the expansion of the bracket 202 and the stringer 203 can be extremely small.
[0122]
【The invention's effect】
As described above, according to the present invention, the construction of the superstructure on the bridge pier is performed in a state where the width is narrowed by folding the superstructure, so that it is possible to pass under the road and to enter humans other than workers. The area that should be restricted is narrowed and the traffic restrictions under the road are kept to a minimum, so that social and economic losses to the surrounding area can be minimized, resulting in the construction cost of the construction itself. Can reduce the expenditure of maintenance projects.
[0123]
  According to the present invention, the divided parts to be developed are also divided in the direction of the bridge axis, and by developing these small divided parts in order from one end of the superstructure, the number of development work itself is increased, but one time development. The labor required for work is reduced, which helps to improve workability. As a result, it is possible to shorten the work period accompanied by traffic restrictions, so that it is possible to minimize social and economic losses to the surrounding area. In addition, since the force to deploy the split body is small and construction can be performed with a relatively small crane, the space for installing the crane is less reinforced.SmallNaTheBecome.
[0124]
In the present invention, a rod is connected to the divided body to be developed, and the divided body is applied with an upward or downward force to the divided body via the rod by raising or lowering the rod by a lifting device. Therefore, it is possible to deploy the divided body more easily than when using a heavy machine such as a crane.
[0125]
In the present invention, by providing a scaffold that can be folded into the divided body, after the divided body is unfolded, the scaffold is quickly unfolded, and the work such as fixing the divided body is performed, and after completion of the work, the scaffold is quickly stored. As a result, traffic restrictions under the road are kept to a minimum. The scaffold can also be used for future maintenance and inspections, in which case road traffic restrictions are kept to a minimum.
[0126]
In the present invention, by adopting pin connection for connection between the divided bodies, it becomes easy to perform operations such as folding or unfolding the upper work. As a result, the work period accompanied by traffic restrictions can be shortened, so that social and economic losses to the surrounding area can be minimized. Further, since the divided bodies are connected by pins, there is no fear that the divided bodies will fall, and the safety is improved. Furthermore, by adopting a 2-pin type pin connection for pin connection, the divided bodies can be connected safely and at low cost.
[0127]
In the present invention, by providing a drive unit that applies a force from one divided body to the other divided body to deploy the other divided body, the divided body can be used without using a large facility such as a crane. Since deployment work can be performed, the troublesome work of using large equipment is eliminated. As a result, the work period accompanied by traffic restrictions can be shortened, so that social and economic losses to the surrounding area can be minimized.
[0128]
In the present invention, by making the drive part detachable, it is possible to use it at a plurality of work locations, and it becomes unnecessary to provide the drive part individually for all the divided bodies, so that the equipment cost can be reduced.
[0129]
In the present invention, since the axis that folds the bracket and the stringer into the main beam is in the vertical direction, the gravity acting on the bracket and the stringer is not involved in the folding, and the force required to deploy the bracket and the stringer is extremely small. That's it.
[Brief description of the drawings]
FIG. 1 is a diagram showing a first embodiment according to the present invention, and is a side view of (a) a bridge pier and a bridge unit, and (b) folding of the bridge unit as viewed from the bridge axis direction.
2A is an exploded view and FIG. 2B is a side view showing a structure of a pin connecting portion.
FIGS. 3A and 3B are state explanatory diagrams showing a step of unfolding a bridge unit on a bridge pier in stages: (a) before unfolding, (b) during unfolding, and (c) after unfolding.
FIG. 4 is also a state explanatory view showing stepwise development operations of the bridge unit on the pier, (a) before deployment, (b) during deployment, (c) (partly) after deployment.
FIG. 5 is a diagram showing a method of staking a divided body constituting a bridge unit.
FIG. 6 is a state explanatory view showing a derivation example of the installation work of the bridge unit on the bridge pier.
FIG. 7 is a side view showing a modification of the bridge unit.
FIG. 8 is a side view showing a modified example of the bridge unit.
FIG. 9 is a view showing a second embodiment according to the present invention, and is a side view of a bridge unit constituting a bridge as seen from the bridge axis direction.
FIGS. 10A and 10B are state explanatory diagrams showing stepwise the expansion operation of the bridge unit on the bridge pier as (a) before expansion, (b) during expansion, and (c) after expansion.
FIG. 11 is a view showing a third embodiment according to the present invention, and is a side view of a bridge pier with an integrated horizontal beam as seen from the bridge axis direction.
FIG. 12 is a view showing a fourth embodiment according to the present invention, and is a side view of a bridge pier integrated with a horizontal beam as seen from the bridge axis direction.
FIGS. 13A and 13B are views showing a fifth embodiment according to the present invention, in which FIG. 13A is a plan view of a bridge pier integrated with a horizontal beam as viewed from above, and FIG. 13B is a side view as viewed from a bridge axis direction. It is.
FIG. 14 is a view showing a sixth embodiment according to the present invention, and is a side view of a bridge pier with an integrated cross beam as seen from the bridge axis direction.
FIG. 15 is a view showing a seventh embodiment according to the present invention, and is a side view of a bridge unit constituting a bridge as seen from the bridge axis direction.
FIG. 16 is a diagram showing an eighth embodiment according to the present invention, and is an enlarged view showing a main part of a bridge unit constituting a bridge.
FIG. 17 is a side view showing a structure of a pin connecting portion including a holder whose upper surface and side surfaces are flat.
FIG. 18 is a side view showing a structure of a pin connecting portion provided with a portion that engages with a holder and a connecting plate.
FIG. 19 is a side view showing a structure of a pin connecting portion provided with teeth on a holder.
FIG. 20 is a side view showing a structure of a pin connecting portion connected by one pin.
FIG. 21 is a side view showing a structure of a connecting portion including a rail.
FIG. 22 is a side view showing the structure of the superstructure provided with a folding scaffold.
FIG. 23 is a diagram showing a first embodiment according to the present invention, and is an overhead view of an upper work in which small divided bodies are connected by a damper.
FIG. 24 is a diagram showing an eighth embodiment according to the present invention, and is a side view of a state of development of an upper work using a pantograph and a jack.
FIG. 25 is a view showing an eighth embodiment according to the present invention, and is a side view of a state of development of an upper work using a flexible duct.
FIG. 26 is a diagram showing an eighth embodiment according to the present invention,YaIt is a side view of the mode of development of the used superstructure.
FIG. 27 is a diagram showing an eighth embodiment according to the present invention, and is a side view of a state of development of an upper work using a jack.
FIG. 28 is a diagram showing a ninth embodiment according to the present invention, and is a side view showing a method of developing a divided body by a rod and a lifting device.
FIG. 29 is a diagram showing a tenth embodiment according to the present invention, and is a plan view showing a state of development of an upper work as viewed from above.
[Explanation of symbols]
  1 ...Bridge pier
  2 ... Main digit
  3 ... Horizontal beam
  10 ... Bridge unit
  10A-10C ... divided body
  10B1 to 10B3, 10C1 to 10C3 ... small divided bodies
  11 ... Pin connecting part
  18 ... Hanging bracket
  19 ... Shackle
  20 ... Bridge unit
  20A to 20C ... divided body
  30 ... T-type pier
  31 ... Horizontal beam
  40 ... Gate pier
  41 ... Horizontal beam
  50 ... Shimoji Bridge Unit
  52. Girder structure
  60 ... Drive device (drive unit)
  61 ... Drive shaft
  63 ... Drive unit
  64 ... gear unit
  161 ... Pantograph
  162 ... Jack
  163 ... Flexible duct
  164 ... Flexible hose
  165 ... Friction blower
  166 ... Hydraulic DanPa
  167 ... WaiYa
  168 ... Seeb
  171 ... Frame
  172 ... pin
  173 ... Scaffolding board
  174 ... morning glory
  181 ... Damper
  191 ... Rod
  192 ... Rod receiver
  193 ... Lifting device
  194 ... Beam
  201 ... Main digit
  202 ... Bracket
  203 ... vertical girder
  E ... Stand
  F ... Stay cable
  K ... Kake part
  R ... Rail
  S ... Slider
  W ... Wirerope
  P ... Splice plate

Claims (12)

The superstructure to be erected on the pier is divided into a plurality of parts in the direction intersecting the bridge axis, and these divided bodies are connected and folded together,
A bridge construction method, wherein the superstructure is installed on the pier in a state where the plurality of divided bodies are folded, and then the divided bodies are expanded. Fold the superstructure so that the other divided body is stacked on a divided body of the plurality of divided bodies,
The bridge construction method according to claim 1, wherein after the superstructure is installed on the pier, the other divided body is developed with respect to the certain divided body.   A rod is connected to the divided body, and the rod is lifted or lowered by an elevating device, thereby applying an upward or downward force to the divided body via the rod to expand the divided body. The bridge construction method according to claim 1. The other divided body is also divided in the bridge axis direction,
3. The method for constructing a bridge according to claim 2, wherein after the superstructure is installed on the pier, the subdivision is developed in order from one end of the superstructure. The upper work to be installed along the main girder under the main girder is divided into a plurality of directions in the direction intersecting the bridge axis, and these divided bodies are connected and folded together,
The superstructure is arranged under the main girder in a state in which the plurality of divided bodies are folded, and then the divided body is expanded and then fixed to the main girder. The superstructure consists of a plurality of divisions divided in the direction intersecting the bridge axis, and the divisions installed on the pier in a folded state can be deployed in a direction protruding from the superstructure in the width direction of the road , superstructure of a bridge, characterized in Rukoto the divided bodies each other has not been connected to collapsible each other.   The bridge superstructure according to claim 6, wherein the divided body is provided with a unit type scaffold.   The bridge superstructure according to claim 6, wherein the divided bodies are connected by a pin structure. The pin structure is installed on both of the divided bodies connected to each other by the pin structure, and a holder having a pin hole;
A connecting plate having at least two pin holes;
9. The bridge superstructure according to claim 8, wherein said connecting plate comprises a pin inserted into a pin hole of said connecting plate and said connecting plate so as to connect said both holders in a rotatable manner.   A drive unit is provided that applies force from one of the plurality of divided bodies connected adjacent to each other to the other divided body to expand the other divided body. The bridge superstructure according to claim 6.   The bridge superstructure according to claim 10, wherein the drive unit is detachable. The main girder,
A bracket attached to at least one of the left and right sides with respect to the bridge axis direction of the main girder so as to be rotatable around a vertical axis;
A bridge superstructure comprising a vertical girder mounted on a side opposite to the main girder of the bracket so as to be rotatable about a vertical axis.

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