JP2018135677A - Method for simultaneously replacing floor slabs for multiple bridges - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for simultaneously replacing floor slabs for multiple bridges which allows floor slabs to be simultaneously replaced on multiple bridges in a shortened construction period.SOLUTION: A method for simultaneously replacing floor slabs for multiple bridges which allows floor slabs for multiple bridges to be collectively replaced in the same construction period includes: a heavy machinery and material carry-in process in which, prior to commencement of floor slab replacement work, heavy machinery and new floor slabs, to be used in the floor slab replacement work, are carried-in via one or both of the bridges located at each end (bridge A and bridge D) of a plurality of bridges (bridge A to bridge D) undergoing floor slab replacement work in the same construction period; an existing floor slab stocking process in which replaced existing floor slabs are stocked on either a road connecting the bridges located at each end (bridge A and bridge D), its surrounding area, or both, after commencement of floor slab replacement work on the bridges located at each end (bridge A and bridge D); and an existing floor slab carry-out process in which the stocked existing floor slabs are carried-out via one or both of the bridges located at each end after completion of the floor slab replacement work on the bridges located at each end.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a floor slab replacement method for replacing a bridge floor slab, and more particularly to a simultaneous bridge floor slab replacement method for simultaneously replacing a plurality of bridge floor slabs.

  Conventionally, replacement of bridge decks has been done one by one because of the necessity of a detour. For example, in Patent Literature 1, the existing composite girder floor slab is removed, and the main girder is prevented from falling down before the precast floor slab is combined with the precast floor slab. For the purpose of eliminating defects in measures, the box opening part formed in the precast floor slab is placed on the upper flange of the main girder, and the distance between the box opening parts in the main girder direction is the distance between the fixed points. A precast floor slab and main girder are temporarily fixed at the box opening part, and after the precast floor slab has been installed, the fixing is released and concrete is placed on the box opening part. (See claim 1 of Patent Document 1, paragraphs [0008] to [0010] of the specification, FIG. 1 and FIG. 9 of the drawings, etc.).

  Moreover, in patent document 2, the web 6 of the steel girder 4 in the existing floor slab 1 of the position to replace is cut | disconnected up and down along a bridge-axis direction, and the existing floor slab 1 is used for the upper web 9b of the steel girder 4. A new floor slab 20 having the same shape and the same size as the existing floor slab 1 is disposed on the lower web 9a of the existing steel girder, and the steel girder lower web 9a and the new floor slab 20 are manufactured separately. A bridge concrete floor slab replacement method for integrally joining the steel girder upper web 29 is disclosed (claim 1 of patent document 2, paragraphs [0022] to [0031] of the specification, FIG. 1 of the drawings, (See FIG. 2 etc.)

  However, if the floor slab replacement work is done one by one as in the past, it will take decades to complete the replacement of the floor slabs of all the bridges, and there is a problem that it can not keep up with the aging of the bridge It has occurred. For this reason, in recent years, it is being requested to perform floor plate replacement work for a plurality of bridges collectively for each IC (interchange).

  However, when the replacement work cannot be performed from under the bridge, there are the following problems when the floor slab replacement work of a plurality of bridges is performed simultaneously. For example, as shown in FIG. 7, when the floor slab replacement work for four bridges, A bridge to D bridge, is to be performed at the same time, when the construction of the floor slabs for A bridge and D bridge located at both ends is started, It is impossible to carry out the existing floor slab S1 or carry in the new floor slab S2 through the A and D bridges. For this reason, there was a problem that the floor slab replacement work for the B and C bridges could not be performed until the floor slab replacement work for the A and D bridges was completed. That is, the conventional floor slab replacement method has a problem that a plurality of bridges cannot be constructed at the same time, and the construction period cannot be shortened. In addition, further shortening of the construction period is required due to a request to shorten the traffic regulation period as much as possible.

JP-A-8-218327 JP 2007-239365 A

  Accordingly, the present invention has been devised in view of the above-described problems, and the object of the present invention is to simultaneously replace the floor slabs of a plurality of bridges to shorten the construction period and simultaneously replace the slabs of a plurality of bridges. Is to provide.

  The multiple bridge floor slab simultaneous replacement method according to the first invention is a multiple bridge floor slab simultaneous replacement method in which a plurality of bridge floor slabs are collectively replaced within the same construction period. Heavy machines that perform floor slab replacement work by passing either or both of these bridges before the start of the floor slab replacement work of the bridges located at both ends of the plurality of bridges that perform plate replacement work, and After the start of heavy equipment material loading process to carry in the new floor slab and the floor slab replacement work of the bridges located at both ends, the existing floor replaced with one or both of the road connecting the bridges located at both ends and the surrounding area After completing the existing floor slab stocking process to stock slabs and the floor slab replacement work for the bridges located at both ends, the existing floor slabs are transported through one or both of these bridges and the existing floor slabs are unloaded. A plate unloading step.

  In the first invention, the simultaneous replacement method for floor slabs of a plurality of bridges according to the second aspect of the present invention may be any of these bridges before the construction of the floor slab replacement work for the bridges located at both ends in the heavy machinery material carrying-in process. One or both of them are passed, and material moving means such as a trailer or a forklift is carried in.

  In the first invention or the second invention, the simultaneous replacement method for floor slabs of a plurality of bridges according to the third invention is any of the bridges located at both ends using the heavy machinery and new floor slabs carried in the heavy machinery material loading step. The bridge slab replacement work is performed.

  In the first and second inventions, the method for simultaneous replacement of floor slabs for a plurality of bridges according to the fourth aspect of the present invention is such that the number of a plurality of bridges for replacing the floor slabs together in the same construction period is three or more bridges, Using the heavy machinery and new floor slabs carried in the material carrying-in process, floor slab replacement work for bridges other than the bridges located at both ends is performed.

  According to the 1st invention-the 4th invention, the floor plan of a floor slab replacement work can be shortened by exchanging the floor slab of a plurality of bridges simultaneously.

  In particular, according to the second invention, since the material moving means such as a trailer or a forklift is carried in before the start of the slab replacement work, the stock position of the removed existing slab and the stock position of the newly installed slab can be easily The work efficiency of the floor slab replacement work can be improved, and the construction period can be further shortened.

  In particular, according to the third invention, because the floor slab replacement work for either of the bridges located at both ends is performed using the heavy machinery and the new floor slab carried in the heavy machinery material carry-in process, the bridges located at both ends At least one of these will allow the floor slabs to be replaced from both sides of the bridge, further reducing the construction period.

  In particular, according to the fourth invention, the floor slab replacement work for bridges other than the bridges located at both ends is performed using the heavy machinery and the new floor slabs carried in the heavy machinery material carry-in process. It is possible to replace the floor slabs of other bridges at the same time. For this reason, a construction period can be shortened.

It is a flowchart which shows each process of the floor slab simultaneous replacement construction method of multiple bridges concerning 1st Embodiment of this invention. It is explanatory drawing explaining the floor slab simultaneous replacement construction method of the multiple bridge which concerns on 1st Embodiment. It is a flowchart which shows each process of the floor slab simultaneous replacement construction method of multiple bridges concerning 2nd Embodiment of this invention. It is explanatory drawing explaining the floor slab simultaneous replacement construction method of the multiple bridge which concerns on 2nd Embodiment. It is a flowchart which shows each process of the floor slab simultaneous replacement construction method of the several bridge concerning 3rd Embodiment of this invention. It is explanatory drawing explaining the floor slab simultaneous replacement construction method of multiple bridges concerning 3rd Embodiment. It is explanatory drawing explaining the conventional floor slab simultaneous replacement construction method of multiple bridges.

  Hereinafter, an embodiment for carrying out a simultaneous slab replacement method for a plurality of bridges according to the present invention will be described in detail with reference to the drawings.

[First Embodiment]
First, the simultaneous replacement method of floor slabs for a plurality of bridges according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. The case where the floor slabs of four bridges from A bridge to D bridge are simultaneously replaced within the same construction period by applying the simultaneous slab replacement method for a plurality of bridges according to this embodiment will be described as an example. Moreover, as a bridge, the bridge of the composite girder by which the existing floor slab S1 made from reinforced concrete was synthesize | combined with the stud bolt etc. on the steel girder G1 is illustrated.

  FIG. 1 is a flowchart showing the steps of the simultaneous replacement method for floor slabs of a plurality of bridges according to the first embodiment of the present invention, and FIG. 2 shows the simultaneous slab of multiple bridges according to the first embodiment of the present invention. It is explanatory drawing explaining a replacement construction method.

(1) Heavy machinery material carrying-in process As shown in FIGS. 1 and 2, in the simultaneous slab replacement method for a plurality of bridges according to the first embodiment, A bridge and D located at both ends of A bridge to D bridge. Prior to the start of the bridge slab replacement work, a heavy equipment material carrying-in process for carrying in the heavy slab and the newly installed floor slab S2 through the A bridge and the D bridge is performed.

  Here, the heavy machinery mainly refers to a self-propelled lifting machine such as a rough terrain crane CL or a crawler crane, and is a concept including a material moving means such as a trailer TL or a forklift. The new floor slab S2 refers to a new precast floor slab that replaces the existing floor slab S1 that has deteriorated due to deterioration (see FIG. 7 and the like).

  In this process, before the construction of the slab replacement work for the A bridge, the new slabs for heavy equipment such as the rough terrain crane CL and the trailer TL that pass the A bridge and perform the slab replacement work for the B bridge and the B bridge S2b is carried into the area A2 between the A bridge and the B bridge. In addition, the new floor slab S2c for heavy equipment such as the rough terrain crane CL and the trailer TL that passes the D bridge and performs the floor slab replacement work for the C bridge before the start of the replacement work for the D bridge floor slab S2c To the area A4 between the D and C bridges. Of course, passing through one of the bridges A and D, carry the heavy equipment for replacing the slabs of the B bridge and the new slab S2b for the B bridge into the area A2, and the floor slab of the C bridge. A heavy machine for replacement work or a new floor slab S2c for the C bridge may be carried into the area A4.

  Also, if necessary, in this process, the floor slab can be replaced with a portal crane for moving materials such as the existing floor slab S1 and the new floor slab S2, equipped with a lifting device such as an electric hoist, or a built-up girder. The erection equipment for the erection girder in the case of carrying out may also be carried into the area A2 or the area A4.

  In addition, in this process, before the start of the slab replacement work for the B and C bridges, for heavy machinery and B bridges that pass the B and C bridges and perform the slab replacement work for the B and C bridges. The new floor slab S2b and the new floor slab S2c for the C bridge may be carried into the area A3 between the B bridge and the C bridge. By doing so, it is possible to replace the floor slabs of the B and C bridges from the area A2 and the area A4 and at the same time to replace the floor slabs of the B and C bridges from the area A3. This is because shortening can be achieved.

(2) Floor slab cutting step Next, in the simultaneous slab replacement method for a plurality of bridges according to the first embodiment of the present invention, a floor for cutting an existing floor slab S1 to a size capable of being lifted by a rough terrain crane CL or the like. A plate cutting process is performed.

  Specifically, using a concrete cutting means such as a diamond cutter or a wire saw, it is cut into a size that can be lifted by a self-propelled lifting machine such as the aforementioned rough terrain crane CL. In the simultaneous slab replacement method for a plurality of bridges according to the present embodiment, this slab cutting process is performed simultaneously for all four bridges of A bridge to D bridge (in the same process in parallel).

(3) Existing floor slab removal process Next, in the simultaneous replacement method of floor slabs of a plurality of bridges according to the present embodiment, an existing floor slab removal process for removing the existing floor slab S1 cut to a predetermined size in the previous process. Do.

  When the existing floor slab S1 is combined with the steel girder G1 by a stud gibber or the like, the combined part is scraped off using a drilling machine such as a call pick hammer or a hydraulic breaker to separate it from the steel girder G1. Remove. Of course, it goes without saying that a synthetic part such as an existing stud gibber may be cut off from the base and cut off from the steel girder G1.

  In the simultaneous slab replacement method for a plurality of bridges according to the present embodiment, the existing floor slab S1 cut in the previous process using the rough terrain crane CL installed in the area A1 up to the A bridge is used on the steel beam G1 of the A bridge. Carry out from the trailer TL. At the same time (in parallel with the same process), the existing floor slab S1 cut in the previous process is removed from the steel beam G1 of the B bridge using the rough terrain crane CL installed in the area A2, and the road in the area A2 and Stock around it.

  At the same time, using the rough terrain crane CL installed in the area A5, the existing floor slab S1 cut in the previous process is carried out from the steel beam G1 of the D bridge by the trailer TL. At the same time, the existing floor slab S1 cut in the previous process is removed from the steel girder G1 of the C bridge using a rough terrain crane CL installed in the area A4 and stocked on the road in the area A4 and its surroundings.

(4) New floor slab installation process Next, in the multiple bridge floor slab simultaneous replacement method according to this embodiment, a new floor slab installation process in which the new floor slab S2 is placed on the steel girder G1 and installed at a predetermined position. I do.

  Specifically, in this step, the previously installed new floor slab S2 is lifted and installed at a predetermined position using the aforementioned rough terrain crane CL or the like.

  In the simultaneous slab replacement method for a plurality of bridges according to the present embodiment, a new floor slab S2a for A bridge newly introduced into area A1 using a rough terrain crane CL or the like installed in area A1 is used as a steel girder for A bridge. Install on G1. At the same time, using the rough terrain crane CL installed in area A2, the new floor slab S2b for B that has been loaded and stocked in area A2 in the heavy machinery material loading process described above is installed on the steel beam G1 of the B bridge. To do.

  At the same time, the new floor slab S2d for the D bridge newly introduced into the area A5 up to the D bridge is installed on the steel beam G1 of the D bridge using the rough terrain crane CL installed in the area A5. At the same time, using the rough terrain crane CL installed in area A3, the new floor slab S2c for C that has been loaded and stocked in area A4 in the heavy machinery material loading process described above is installed on the steel beam G1 of the C bridge. To do.

(5) Stud Standing Step Next, in the simultaneous replacement method of the multiple bridge floor slabs according to this embodiment, the upper surface of the steel girder G1 in the cotter (hole for synthesis) of the new floor slab S2 installed in the previous step. A stud erection process is performed to erect a newly installed stud gibber.

  Specifically, in this process, the welding gun of the stud welding machine is pressed against the stud gibber, and the stud gibber is melted one by one on the upper surface of the steel girder G1, and the cotter (hole for synthesis) of the newly installed floor slab S2 is obtained. ) Instead of planting the stud gibber, the steel girder G1 may be drilled and a bolt or the like may be bolted to the hole to stand upright.

  In addition, in the simultaneous slab replacement method for a plurality of bridges according to the present embodiment, this stud standing process is performed simultaneously for all four bridges A bridge to D bridge (in the same process in parallel).

(6) Filler Filling Step Next, in the simultaneous slab replacement method for multiple bridges according to the present embodiment, a filler filling step of filling a filler such as a non-shrink mortar into the cotter of the new floor slab S2 is performed. .

  As a filler used in this step, a hardened cement cured by a hydration reaction such as general concrete or mortar can be used in addition to non-shrink mortar. However, when the gap between the cotter and the stud gibber is narrow, a mortar having no coarse aggregate is preferable, and a non-shrinkable mortar with extremely little drying shrinkage at the time of curing is more preferable. If cost is not taken into consideration, it is also possible to use a resin or the like as the filler.

  In addition, in the simultaneous slab replacement method for a plurality of bridges according to the present embodiment, this filling material filling process is also performed at the same time for all four bridges A bridge to D bridge (in the same process in parallel).

  After performing this process, take a curing period until the filler hardens, perform other necessary work such as asphalt pavement on the new floor slab S2, and stock it in area A2 and area A4 The existing floor slab S1 and the remaining materials that have been removed are carried out. Then, a self-propelled lifting machine such as a rough terrain crane CL and a heavy machine including a material moving means such as a trailer TL are carried out, and the floor slab replacement work of the simultaneous replacement method of the floor slabs of the multiple bridges according to this embodiment is completed To do.

  As described above, according to the simultaneous slab replacement method for a plurality of bridges according to the first embodiment of the present invention, before the start of the slab replacement work for both the A bridge and the D bridge, A heavy machine and a new floor slab S2 that carry out the floor slab replacement work by passing through the D bridge are carried in. For this reason, in (2) floor slab cutting process to (6) filling material filling process, which are subsequent processes, all four bridges of A bridge to D bridge can be performed simultaneously. Therefore, the work efficiency of the floor slab replacement work can be improved and the construction period of the floor slab replacement work can be shortened.

  Further, according to the simultaneous replacement method of the floor slabs of the plurality of bridges according to the first embodiment, the material transfer means such as the trailer TL or the forklift is set in the area A2 or the like before the start of the floor slab replacement work of the A bridge and the D bridge. Carry into area A4. For this reason, even after the start of the slab replacement work for the A and D bridges, the stock position of the removed existing slab S1 and the stock position of the newly installed slab S2 can be easily replaced in area A2 and area A4. Can do. Therefore, the work efficiency of the floor slab replacement work can be improved and the construction period can be further shortened.

[Second Embodiment]
Next, the simultaneous replacement method for floor slabs of a plurality of bridges according to the second embodiment of the present invention will be described with reference to FIGS. As in the first embodiment, the case where the floor slabs of four bridges from A bridge to D bridge are simultaneously replaced within the same construction period by applying the method of simultaneous replacement of the slabs of multiple bridges according to this embodiment is illustrated. To explain.

  FIG. 3 is a flowchart showing the steps of the simultaneous replacement method for a plurality of bridge slabs according to the second embodiment of the present invention, and FIG. 4 shows the simultaneous slab for a plurality of bridges according to the second embodiment of the present invention. It is explanatory drawing explaining a replacement construction method.

(1) Heavy machinery material carrying-in process As shown in FIGS. 3 and 4, in the simultaneous slab replacement method for multiple bridges according to the second embodiment, A bridge and D located at both ends of A bridge to D bridge. Prior to the start of the bridge slab replacement work, a heavy equipment material carrying-in process for carrying in the heavy slab and the newly installed floor slab S2 through the A bridge and the D bridge is performed.

  In this step, as in the first embodiment, before the start of the bridge slab replacement work of A bridge, the rough terrain crane CL, trailer TL, etc. that passes the A bridge and performs the bridge slab replacement work of B bridge A heavy machine or a new floor slab S2b for the B bridge is carried into the area A2 between the A bridge and the B bridge. In addition, a heavy machine that passes through the A bridge and performs a floor slab replacement work for the A bridge and a new floor slab S2a for the A bridge are carried into the area A2.

  In addition, in this process, as in the first embodiment, before the start of the D bridge floor slab replacement work, a new heavy machine or C bridge will be installed to pass the D bridge and perform the C bridge floor slab replacement work. The floor slab S2c is carried into the area A4 between the D bridge and the C bridge. In addition, a heavy machine that passes through the D bridge and performs a floor slab replacement work for the D bridge and a new floor slab S2d for the D bridge are carried into the area A2.

(2) Floor slab cutting step Next, in the simultaneous slab replacement method for multiple bridges according to the second embodiment of the present invention, the existing floor slab S1 is lifted by a rough terrain crane CL or the like as in the first embodiment. A floor slab cutting process is performed to cut to a possible size. At this time, in the simultaneous slab replacement method for a plurality of bridges according to the present embodiment, this slab cutting process is performed simultaneously for all four bridges of the A bridge to the D bridge.

(3) Existing floor slab removal process Next, in the simultaneous replacement method of floor slabs of a plurality of bridges according to the present embodiment, an existing floor slab removal process for removing the existing floor slab S1 cut to a predetermined size in the previous process. Do.

  In the simultaneous slab replacement method for a plurality of bridges according to the present embodiment, the existing floor slab S1 cut in the previous process is removed from the steel beam G1 of the A bridge by using a rough terrain crane CL or the like installed in the area A1. Unload at. At the same time, the existing floor slab S1 cut in the previous step is removed from the steel beam G1 of the B bridge using a rough terrain crane CL installed in the area A2, and stocked in the area A2. In addition, the existing floor slab S1 cut in the previous process is removed from the steel girder G1 of the A bridge using another rough terrain crane CL installed in the area A2, and stocked in the area A2.

  At the same time, using the rough terrain crane CL installed in the area A5, the existing floor slab S1 cut in the previous process is carried out from the steel beam G1 of the D bridge by the trailer TL. At the same time, the existing floor slab S1 cut in the previous process is removed from the steel girder G1 of the C bridge using a rough terrain crane CL installed in the area A4 and stocked on the road in the area A4 and its surroundings. In addition, the existing floor slab S1 cut in the previous process is removed from the steel girder G1 of the D bridge by using another rough terrain crane CL installed in the area A4 and stocked in the area A4.

(4) New floor slab installation process Next, in the multiple bridge floor slab simultaneous replacement method according to the present embodiment, the new floor slab S2 is placed on the steel girder G1 in the same manner as in the first embodiment. A new floor slab installation process will be installed.

  In the simultaneous slab replacement method for a plurality of bridges according to the present embodiment, a new floor slab S2a for A bridge newly introduced into the area A1 up to the A bridge using the rough terrain crane CL installed in the area A1 is A. Installed on the steel girder G1 of the bridge. At the same time, using the rough terrain crane CL installed in area A2, the new floor slab S2b for B that has been loaded and stocked in area A2 in the heavy machinery material loading process described above is installed on the steel beam G1 of the B bridge. To do. In addition, using the other rough terrain crane CL installed in area A2, the newly installed floor slab S2a for A bridge that has been loaded and stocked in area A2 in the heavy machinery material loading process described above is used for steel of A bridge. Install on the girder G1.

  At the same time, the new floor slab S2d for the D bridge newly introduced into the area A5 up to the D bridge is installed on the steel beam G1 of the D bridge using the rough terrain crane CL installed in the area A5. At the same time, using the rough terrain crane CL installed in area A3, the new floor slab S2c for C that has been loaded and stocked in area A4 in the heavy machinery material loading process described above is installed on the steel beam G1 of the C bridge. To do. In addition, using the other rough terrain crane CL installed in area A4, the newly installed floor slab S2d for D bridge that has been loaded and stocked in area A4 in the heavy machinery material loading process described above is used as steel for D bridge. Install on the girder G1.

  Next, in the simultaneous slab replacement method for a plurality of bridges according to the present embodiment, (5) a stud standing process and (6) a filler filling process are performed as in the first embodiment. Since the stud erecting step and the filler filling step are not particularly different from those of the first embodiment, description thereof is omitted.

  After performing the above steps, take a curing period until the filler is hardened, and perform other necessary work such as asphalt pavement on the new floor slab S2, and stock it in area A2 and area A4 The existing floor slab S1 and the remaining materials that have been removed are carried out. Then, a self-propelled lifting machine such as a rough terrain crane CL and a heavy machine including a material moving means such as a trailer TL are carried out, and the floor slab replacement work of the simultaneous replacement method of the floor slabs of a plurality of bridges according to this embodiment is completed. To do.

  As described above, according to the simultaneous slab replacement method for a plurality of bridges according to the second embodiment of the present invention, before the start of the slab replacement work for both the A bridge and the D bridge, A heavy machine and a new floor slab S2 for carrying out the floor slab replacement work for the A bridge and the D bridge are carried through the D bridge. For this reason, in the subsequent steps (2) floor slab cutting step to (4) new floor slab installation step, the floor slab replacement work from both sides of the A bridge and the D bridge becomes possible. Therefore, the work efficiency of the floor slab replacement work can be improved and the construction period of the floor slab replacement work can be shortened.

[Third Embodiment]
Next, the multiple bridge floor slab simultaneous replacement method according to the third embodiment of the present invention will be described with reference to FIGS. 5 and 6. The case where the floor slabs of the two bridges A ′ bridge and B ′ bridge are simultaneously replaced within the same construction period by applying the floor slab simultaneous replacement method according to the present embodiment will be described as an example.

  FIG. 5 is a flowchart showing the steps of the simultaneous replacement method for a plurality of bridge slabs according to the third embodiment of the present invention, and FIG. 6 shows the simultaneous slab for a plurality of bridges according to the third embodiment of the present invention. It is explanatory drawing explaining a replacement construction method.

(1) Heavy equipment material carrying-in process As shown in FIGS. 5 and 6, in the simultaneous slab replacement method for multiple bridges according to the third embodiment, A ′ bridge and B as in the first and second embodiments. Prior to the start of the bridge slab replacement work, a heavy equipment material carrying-in process for carrying in the heavy slab replacement work and the new floor slab S2 through the A 'and B' bridges is performed.

  In this process, before the start of the construction work for replacing the floor slab of A 'bridge, heavy equipment such as a rough terrain crane CL and a trailer TL that passes the A' bridge and performs the construction work for replacing the floor slab of A 'bridge, The new floor slab S2a ′ is carried into the area A2 ′ between the A ′ bridge and the B ′ bridge. In addition, a heavy machine that passes through the B 'bridge and performs a floor slab replacement work for the B' bridge and a new floor slab S2a for the B 'bridge are carried into the area A2'.

(2) Floor slab cutting step Next, in the simultaneous slab replacement method for a plurality of bridges according to the third embodiment of the present invention, the existing floor slab S1 is replaced with a rough terrain crane, as in the first and second embodiments. A floor slab cutting process is carried out to cut to a size that can be lifted by CL or the like. At this time, in the simultaneous slab replacement method for a plurality of bridges according to the present embodiment, this slab cutting process is simultaneously performed on the A ′ bridge and the B ′ bridge.

(3) Existing floor slab removal process Next, in the multiple bridge floor slab simultaneous replacement method according to the present embodiment, as in the first and second embodiments, it was cut into a predetermined size in the previous process. An existing floor slab removal step for removing the existing floor slab S1 is performed.

  In the simultaneous bridge floor slab replacement method according to the present embodiment, the existing floor slab S1 cut in the previous process is trailed from the steel beam G1 of the A 'bridge using the rough terrain crane CL installed in the area A1'. Unload by TL. At the same time, using the rough terrain crane CL installed in the area A2 ', the existing floor slab S1 cut in the previous process is removed from the steel beam G1 of the A' bridge and stocked in the area A2 '.

  Further, using the rough terrain crane CL installed in the area A3 ', the existing floor slab S1 cut in the previous process is carried out from the steel beam G1 of the B' bridge by a trailer TL or the like. At the same time, the existing floor slab S1 cut in the previous process is removed from the steel beam G1 of the B 'bridge using the rough terrain crane CL installed in the area A2' and stocked in the area A2 '.

(4) New floor slab installation process Next, in the multiple bridge floor slab replacement method according to this embodiment, the new floor slab S2 is mounted on the steel girder G1 as in the first and second embodiments. A new floor slab installation process is carried out.

  In the simultaneous slab replacement method for a plurality of bridges according to the present embodiment, a new floor slab S2a ′ for A ′ bridge newly loaded into area A1 ′ is used by using a rough terrain crane CL or the like installed in area A1 ′. 'Install on the steel girder G1 of the bridge. At the same time, using the rough terrain crane CL installed in the area A2 ′, the new floor slab S2b for the A ′ bridge that has been loaded and stocked in the area A2 ′ in the heavy machinery material loading process described above is used for the steel of the A ′ bridge. Install on the girder G1.

  At the same time, using a rough terrain crane CL installed in area A3 ′, the newly installed floor slab S2b ′ for B ′ bridge newly introduced into area A3 ′ up to B ′ bridge is replaced with a steel girder for B ′ bridge. Install on G1. At the same time, using the other rough terrain crane CL installed in area A2 ′, the newly installed floor slab S2b for B ′ bridge that has been loaded and stocked in area A2 ′ in the aforementioned heavy machinery material loading process B 'Install on the steel girder G1 of the bridge.

  Next, in the simultaneous slab replacement method for a plurality of bridges according to the present embodiment, (5) a stud standing step and (6) a filler filling step are performed as in the first and second embodiments. . Since the stud erecting step and the filler filling step are not particularly different from the first embodiment and the second embodiment, description thereof is omitted.

  After performing the above steps, take a curing period until the filler hardens, perform other necessary work such as asphalt paving on the new floor slab S2, and stock it in area A2 ' The existing floor slab S1 and the remaining materials are carried out. Then, a self-propelled lifting machine such as a rough terrain crane CL and a heavy machine including a material moving means such as a trailer TL are carried out, and the floor slab replacement work of the simultaneous replacement method of the floor slabs of a plurality of bridges according to this embodiment is completed. To do.

  As described above, according to the simultaneous replacement method of floor slabs of a plurality of bridges according to the third embodiment of the present invention, before the start of the floor slab replacement work of A ′ bridge and B ′ bridge, A ′ bridge and B The heavy machinery and the newly installed floor slab S2 that carry out the floor slab replacement work of the A 'and B' bridges through the bridge are carried in. Therefore, in the subsequent steps (2) floor slab cutting step to (4) newly installed floor slab installation step, the floor slab replacement work from both sides of the A 'bridge and the B' bridge becomes possible. Therefore, the work efficiency of the floor slab replacement work can be improved and the construction period of the floor slab replacement work can be shortened.

  As mentioned above, the floor slab simultaneous replacement construction method of the plurality of bridges according to the first to third embodiments of the present invention has been described in detail. However, each of the above-described or illustrated embodiments is merely a specific embodiment for carrying out the present invention, and the technical scope of the present invention should not be construed as being limited thereto. Is.

G1: (existing) steel girder S1: existing floor slab S2: new floor slab S2a: new floor slab for A bridge (new floor slab)
S2b: New floor slab for B bridge (new floor slab)
S2c: New floor slab for C bridge (new floor slab)
S2d: New slab for D bridge (new slab)
S2a ': New floor slab for A' bridge (new floor slab)
S2b ': New floor slab for B' bridge (new floor slab)
CL: Rough terrain crane TL: Trailer

The simultaneous slab replacement method for multiple bridges according to the first invention is a simultaneous slab replacement method for multiple bridges in which the slabs of three or more bridges are replaced together within the same construction period. Before starting construction of floor slab replacement work for the bridges located at both ends of the above three or more bridges that will perform floor slab replacement work within the period, either one or both of these bridges will be allowed to pass. Heavy equipment to carry in the slab replacement work and heavy equipment material loading process to carry in the newly installed slab, and the road connecting the bridges located at both ends and the surrounding area after the start of the slab replacement work of the bridge located at both ends After completion of the existing floor slab stocking process for stocking the existing floor slab replaced with one or both of the above and the floor slab replacement work of the bridges located at both ends, the stock is passed through either or both of these bridges. An existing floor slab unloading step for unloading the existing floor slab , Using the heavy machinery and new floor slabs carried in the machine material carrying-in process, the floor slab replacement work for the bridges located at both ends and the other bridges is simultaneously performed within the same construction period .

According to 1st invention- 3rd invention, since the floor slab replacement | exchange construction of bridges other than a bridge located in both ends is performed using the heavy machinery carried in the heavy machinery material carrying-in process and a newly installed floor slab, the bridge located in both ends And other bridge deck replacement works can be performed at the same time. For this reason, a construction period can be shortened.

Claims (4)

It is a method for simultaneous replacement of multiple slab floor slabs within the same construction period.
Among the multiple bridges that will be replaced during the same construction period, before starting the replacement work for the bridges located at both ends, pass one or both of these bridges to remove the floor slab. Heavy equipment material carrying-in process for carrying in heavy equipment for replacement work and new floor slabs;
After the start of the floor slab replacement work of the bridges located at both ends, an existing floor slab stock process for stocking the existing floor slabs replaced with one or both of the road connecting the bridges located at both ends and the surroundings;
An existing floor slab unloading step of unloading the existing floor slabs stocked by passing through one or both of the bridges after completion of the floor slab replacement work of the bridges located at both ends. The simultaneous replacement method for floor slabs of multiple bridges. In the heavy machinery material carrying-in process, before starting the construction work for replacing the floor slabs of the bridges located at both ends, the material moving means such as a trailer or a forklift is carried through one or both of these bridges. The simultaneous replacement method for floor slabs of a plurality of bridges according to claim 1 characterized by the above. 3. The plurality of bridges according to claim 1, wherein a floor slab replacement work of any one of the bridges located at both ends is performed using the heavy equipment and the new floor slab carried in the heavy equipment material carrying-in process. Bridge floor plate simultaneous replacement method. The number of multiple bridges that replace floor slabs together within the same construction period is 3 or more,
The bridge slab replacement work for bridges other than the bridges located at both ends is performed using the heavy machinery and the newly installed floor slab carried in the heavy machinery material carrying-in process. Floor slab simultaneous replacement method.

Images