Method and structure for increasing coupling strength between existing floor slab and new floor slab in floor slab replacement work, and floor slab replacement method using the method and structure

Abstract

To connect an existing floor slab and a new floor slab having sufficient strength to resume traffic over a long period even when floor slab replacement work is performed in a bridge or the like with a bridge length so long that the floor slab replacement work cannot be completed within a predetermined traffic regulation period and / or when the floor slab replacement work is not completed and the existing floor slab and the new floor slab are mixed in a construction zone.SOLUTION: A mounting step of mounting a connection member, which is a member protruding from an existing floor slab to the existing floor slab in a gap that is a space between the existing floor slab and a new floor slab that are adjacent to each other, in floor slab replacement work in which the existing floor slab is removed and the new floor slab is disposed at a removal location of the existing floor slab; a placing step of pouring a filler having fluidity into a filling region, which is a region including at least the connection member of the gap and the joint reinforcing bar protruding from the new floor slab into the gap; and a curing step of curing the filler poured into the filling region are executed.SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The present disclosure relates to a method and structure for increasing the bonding strength between an existing deck slab and a newly constructed deck slab in deck replacement work, and a deck replacement method using the method and structure. [Background technology]

[0002] In deck replacement work using conventional methods, a certain section of the existing deck is removed, a new deck is installed in that section, and the deck is waterproofed and paved before traffic is opened (see, for example, paragraph

[0002] of Patent Document 1). Such conventional methods are carried out accompanied by some sort of traffic control in the construction section, for example, closing the up-bound lanes of a highway and restricting two-way traffic on the down-bound lanes. Because such traffic controls have a large impact on society, it is difficult for the road administrator (client) to determine the traffic control period alone, and in reality, the traffic control period is set through consultation with related organizations such as the traffic administrator (police).

[0003] The traffic control period determined as above may not be sufficient to complete the deck replacement work, for example, depending on the number of standard workers and heavy equipment. In this case, it is necessary to extend the traffic control period, but as mentioned above, the traffic control period requires the permission of the traffic manager, and considering the social impact, it is generally difficult to extend the traffic control period. If it were possible to firmly connect the existing deck and the new deck, it would be possible to suspend the deck replacement work and resume traffic according to the preset traffic control period. However, the technology that can connect the existing deck and the new deck with sufficient strength to enable traffic to be resumed has not been established in the technical field.

[0004] Due to the above circumstances, in the past, it was necessary to complete deck replacement work within the designated traffic control period by, for example, increasing the number of workers and heavy machinery to increase the amount of work done per day, or by including weekends in the work period in addition to daytime work on weekdays. However, such measures are not desirable from the standpoint of, for example, cost management, labor management, and safety management. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2005-282272 A Summary of the Invention [Problem to be solved by the invention]

[0006] As mentioned above, in this technical field, there is a demand for technology that can connect the existing deck and the new deck with sufficient strength to enable traffic to be resumed for an extended period of time, even when the deck replacement work has not been completed and the existing deck and the new deck are mixed in the construction area.

[0007] The present disclosure has been made in consideration of the above-mentioned problems, and aims to provide a method and structure for increasing the bonding strength between an existing deck slab and a newly constructed deck slab in deck replacement work, as well as a deck replacement method using the method and structure. [Means for solving the problem]

[0008] As a result of intensive research, the inventors have discovered that the above problem can be solved in situations where deck replacement work has not been completed by fixing a reinforcing material to the existing deck so that it protrudes into the space between the newly constructed deck and the existing deck adjacent to the newly constructed deck, and pouring and hardening a filler material into the area of ​​the space that includes at least the reinforcing material and the joint steel bar protruding from the newly constructed deck into the space.

[0009] Specifically, the method of increasing the bonding strength between an existing deck slab and a new deck slab according to the present disclosure (hereinafter also referred to as the "presently disclosed method") is a method of increasing the bonding strength between an existing deck slab and a new deck slab in deck replacement work in which the existing deck slab is removed and a new deck slab is installed in the location where the existing deck slab was removed. In other words, the presently disclosed method is a method of increasing the bonding strength between an existing deck slab and a new deck slab in a state before deck replacement work is completed and all existing deck slabs are replaced with new deck slabs. The presently disclosed method is characterized by including the installation process, pouring process, and hardening process listed below.

[0010] The mounting process is a process of attaching a connecting member, which is a member that protrudes from the existing deck slab, to the existing deck slab in the gap, which is the space between the adjacent existing and new deck slabs. The casting process is a process of pouring a filler having fluidity into at least the filling area of ​​the gap. The filling area is an area including the connection member protruding from the existing deck into the gap and the joint reinforcing bar protruding from the new deck into the gap. The hardening step is a step of hardening the filling material poured into the filling region.

[0011] Another aspect of the disclosed method is characterized in that it further includes a reinforcing step of fixing reinforcing members to the existing deck and the new deck on the upper and / or lower sides of the gap so as to span the gap.

[0012] Another aspect of the disclosed method is characterized in that it further includes an edge cutting process, prior to the pouring process, in which a portion of the end face facing the filling area of ​​the newly constructed deck is covered with an edge cutting material, which is a material that reduces the adhesion strength between the filling material and the end face.

[0013] As stated at the beginning of this specification, the present disclosure relates not only to a method for increasing the bonding strength between an existing deck slab and a newly constructed deck slab in deck replacement work, but also to a structure for increasing the bonding strength between an existing deck slab and a newly constructed deck slab in deck replacement work.

[0014] The structure for increasing the bonding strength between the existing deck slab and the new deck slab in deck replacement work according to the present disclosure (hereinafter also referred to as the "disclosed structure") is a structure for increasing the bonding strength between the existing deck slab and the new deck slab in deck replacement work in which the existing deck slab is removed and a new deck slab is installed in the location where the existing deck slab was removed. In other words, the disclosed structure is a structure for increasing the bonding strength between the existing deck slab and the new deck slab in the state before the deck replacement work is completed and all the existing deck slabs are replaced with new deck slabs.

[0015] In the disclosed structure, a connecting member that protrudes from the existing deck slab is attached to the existing deck slab in the gap between the adjacent existing and new deck slabs, and the existing and new deck slabs are connected by a filler that hardens in at least the filling area of ​​the gap. The filling area is an area that includes the connecting member that protrudes from the existing deck slab into the gap and the joint reinforcing bar that protrudes from the new deck slab into the gap.

[0016] Another aspect of the disclosed structure is characterized in that it further comprises reinforcing members fixed to the existing deck and the new deck so as to span the gap on the upper and / or lower sides of the gap.

[0017] Another aspect of the disclosed structure is characterized in that an edge cutter, which is a material that reduces the adhesion strength between the end face facing the filling area of ​​the newly constructed deck and the filler, is arranged so as to be interposed between a portion of the end face of the newly constructed deck and the filler.

[0018] As described at the beginning of this specification, the present disclosure relates not only to a method and structure for increasing the bonding strength between an existing deck slab and a newly constructed deck slab in deck replacement work, but also to a deck replacement construction method using the method and structure.

[0019] The deck replacement method according to the present disclosure (hereinafter also referred to as the "disclosed method") includes a control process for controlling traffic in the area where the deck replacement work is to be carried out, a removal process for removing the existing deck, and a new installation process for installing a new deck at the location where the existing deck was removed. In addition, the disclosed method is characterized by further including the installation process, casting process, and hardening process listed below.

[0020] The mounting process is a process of attaching a connecting member, which is a member that protrudes from the existing deck slab, to the existing deck slab in the gap, which is the space between the adjacent existing and new deck slabs. The casting process is a process of pouring a filler having fluidity into at least the filling area of ​​the gap. The filling area is an area including the connection member protruding from the existing deck into the gap and the joint reinforcing bar protruding from the new deck into the gap. The hardening step is a step of hardening the filling material poured into the filling region.

[0021] Another aspect of the disclosed construction method is characterized in that it further includes a reinforcing step of fixing reinforcing members to the existing deck slab and the new deck slab on the upper and / or lower sides of the gap so as to span the gap.

[0022] Another aspect of the disclosed construction method is characterized in that it further includes an edge cutting process, prior to the pouring process, in which a portion of the end face facing the filling area of ​​the newly constructed deck slab is covered with an edge cutting material, which is a material that reduces the adhesion strength between the filling material and the end face. Effect of the Invention

[0023] In the method, structure and construction method according to the present disclosure, as described above, in a situation where the deck replacement work has not been completed, a connection member is attached to the existing deck so as to protrude into the gap between the new deck and the existing deck adjacent to the new deck, and a filler is poured into the area of ​​the gap including at least the connection member and the joint reinforcing bar protruding from the new deck and hardened. As a result, according to the method, structure and construction method according to the present disclosure, even if the deck replacement work has not been completed and the existing deck and the new deck are mixed in the construction area, it is possible to connect the existing deck and the new deck with sufficient strength to enable traffic to be resumed for a long period of time. Therefore, even if it is impossible to complete the deck replacement work within the predetermined traffic control period, traffic can be resumed according to the traffic control period, and the impact of the traffic control associated with the deck replacement work on society can be minimized. [Brief description of the drawings]

[0024] [Figure 1] 1 is a flowchart showing the flow of each construction process in a typical deck replacement method. [Diagram 2] FIG. 1 is a schematic diagram showing an example of traffic control carried out during a period (traffic control period) from a control step (step S01) to a resumption step (step S05) included in a general deck replacement construction method. [Diagram 3] FIG. 1 is a schematic diagram illustrating a conventional method for completing deck replacement work within a predetermined traffic control period. [Figure 4] 1 is a flowchart showing an example of the flow of each step in a method for increasing the bonding strength between an existing deck 10 and a new deck 20 according to the present disclosure (the method disclosed herein). [Diagram 5] 5 is a schematic cross-sectional view illustrating the state of a gap 30 between an existing deck 10 and a new deck 20 in each process illustrated in FIG. 4. [Figure 6] 2 is a flowchart showing an example of the flow of each construction process in the deck replacement method according to the present disclosure (the presently disclosed construction method). [Figure 7] 4 is a flowchart showing another example of the flow of each construction process in the deck replacement method according to the present disclosure (the presently disclosed construction method). [Figure 8] FIG. 13 is a schematic perspective view illustrating a removal process for removing an existing deck in deck replacement work using the disclosed construction method. [Figure 9] This is a schematic oblique view illustrating a new installation process in which a new deck slab is installed at the location where the existing deck slab has been removed in deck replacement work using the disclosed construction method. [Figure 10] FIG. 1 is a schematic perspective view illustrating a state in which pavement has been laid on the top surface of a newly constructed deck, enabling traffic restrictions to be lifted and traffic to be resumed. [Figure 11] This is a schematic cross-sectional view illustrating the state in which the mounting process, pouring process, and hardening process (steps S11 to S13) included in the disclosed method, which are executed in the disclosed construction method, have been performed, and the disclosed structure has been formed, including a temporary connection portion 50 that firmly connects adjacent existing deck slabs 10 and newly constructed deck slabs 20. [Figure 12]FIG. 13 is a schematic diagram illustrating how deck replacement work is divided into multiple parts using the disclosed construction method. [Figure 13] FIG. 11 is a schematic enlarged cross-sectional view of the vicinity of a temporary connection portion 50 connecting an existing deck 10 and a new deck 20, showing an example of the configuration of a structure disclosed herein formed by a method disclosed herein relating to another embodiment. [Figure 14] FIG. 11 is a schematic enlarged cross-sectional view of the vicinity of a temporary connection 50 connecting an existing deck 10 and a new deck 20, showing an example of the configuration of a structure disclosed herein formed by a method disclosed herein relating to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] Hereinafter, a method (the disclosed method) and a structure (the disclosed structure) for increasing the bond strength between an existing deck and a new deck according to the present disclosure, as well as a deck replacement method (the disclosed method) according to the present disclosure will be described with reference to the drawings. Hereinafter, the disclosed method, the disclosed structure, and the deck replacement method (the disclosed method) according to the present disclosure will also be referred to as the "technology of the present disclosure."

[0026] <composition> First, the disclosed method and structure are intended to increase the bonding strength between an existing deck and a new deck in, for example, a deck replacement method for bridges, etc. In a deck replacement method to which the disclosed method and structure are applied, the existing deck is removed and a new deck is installed in the location where the existing deck was removed.

[0027] FIG. 1 is a flowchart showing an example of the flow of each construction process in a general deck replacement method. The deck replacement method shown in FIG. 1 includes a restriction process (step S01) for restricting traffic in a section where the deck replacement work is to be performed, a removal process (step S02) for removing the existing deck, a new installation process (step S03) for installing a new deck at the removal location of the existing deck, and a resumption process (step S05) for lifting traffic restrictions in the section and resuming traffic. Furthermore, after the new installation process (step S03), a first determination process (step S04) is included for determining whether or not replacement of all existing decks with new decks has been completed, and the removal process (step S02) and the new installation process (step S03) are repeated until all existing decks are replaced with new decks. In addition, in the flowchart shown in FIG. 1, the process of waterproofing and paving the deck after installing the new deck is omitted.

[0028] Fig. 2 is a schematic diagram showing an example of traffic regulation implemented during the period (traffic regulation period) from the regulation step (step S01) to the resumption step (step S05) described above. In the example shown in Fig. 2, two-way traffic regulation is implemented, with traffic being blocked in one of the upbound and downbound lanes, and two-way traffic being implemented in one lane each in the other two lanes. As described at the beginning of this specification, such traffic regulations have a large impact on society, so it is difficult for the road administrator (client) alone to determine the traffic regulation period, and the traffic regulation period is set through consultation with related organizations such as the traffic administrator (police), for example.

[0029] The traffic control period determined as above may not necessarily be sufficient to complete the deck replacement work by replacing all existing decks with new decks, for example, depending on the number of standard workers and heavy equipment. However, it is virtually impossible for the traffic control period to be extended or for a new traffic control period to be established in the near future in order to complete the deck replacement work by replacing the remaining existing decks with new decks, and a new traffic control period will be set after a fairly long period of time, such as several months, has passed.

[0030] On the other hand, if the deck replacement work is not completed, the existing deck and the new deck will be mixed in the construction area, but under such circumstances, there is no established technology in the art that can connect the existing deck and the new deck with sufficient strength to enable traffic to be resumed for a long period until the next new traffic control period. For this reason, in the past, it was necessary to complete the deck replacement work within the predetermined traffic control period by, for example, increasing the number of workers and heavy machinery to increase the amount of construction per day, or by incorporating holidays into the construction period in addition to weekday daytime hours.

[0031] FIG. 3 is a schematic diagram for explaining a conventional method for completing deck replacement work within a predetermined traffic control period as described above. For example, when deck replacement work is performed using standard workers (not shown) and a number of heavy machinery 200 such as large cranes, only six existing decks 10 can be replaced with new decks 20 per day, so the deck replacement work progresses only in a section of (6×2m=) 12m per day. Therefore, in order to perform deck replacement work on a bridge with a bridge length of 300m, a period of (300m / 12m / day=) 25 days is required. However, as described above, a sufficient traffic control period for completing the deck replacement work is not necessarily set. If a traffic control period of 13 days is set, if the deck replacement work is performed using a standard number of workers and heavy machinery, only a section of about 150m, which is about half the bridge length, can replace the deck, as illustrated in FIG. 3(a).

[0032] Therefore, if the number of workers (not shown) and heavy machinery 200 is doubled to double the amount of work per day, 12 decks can be replaced per day, and deck replacement work can be carried out for a section of (12 decks x 2 m =) 24 m per day. As a result, as shown in FIG. 3(b), deck replacement work for a bridge with a bridge length of 300 m can be completed in a period of (300 m / 24 m / day ≒) 13 days. However, as mentioned above, such a response is not desirable from the standpoint of, for example, cost management, labor management, and safety management.

[0033] Therefore, the technology of the present disclosure enhances the bonding strength between the existing deck and the new deck before the deck replacement work is completed and all the existing decks are replaced with new decks. FIG. 4 is a flowchart showing an example of the flow of each process in the method of the present disclosure. As illustrated in FIG. 4, the method of the present disclosure includes the following mounting process (step S11), pouring process (step S12), and hardening process (step S13) in order to enable traffic to be resumed in accordance with the contracted traffic control period even if the deck replacement work cannot be completed within the traffic control period. FIG. 5 is a schematic cross-sectional view illustrating the state of the gap between the existing deck and the new deck in each process illustrated in FIG. 4. Each process included in the method of the present disclosure will be described in detail below with reference to FIG. 4 and FIG. 5.

[0034] The mounting process shown in step S11 in Figure 4 is a process of attaching a connecting member 11, which is a member that protrudes from the existing deck slab 10, to the existing deck slab 20 in a gap 30, which is the space between the adjacent existing deck slab 10 and the new deck slab 20.

[0035] The specific configuration (e.g., material, shape, number, arrangement, etc.) of the connection member 11 is not particularly limited as long as it is possible to connect the existing deck 10 and the new deck 20 with the presently disclosed structure formed by the presently disclosed method, with a strength sufficient to withstand the load of heavy machinery and the like during construction and the load on the bridge surface, such as wheel load when traffic is opened. Typically, rod-shaped members having high mechanical strength, such as reinforcing bars or carbon fiber rods, can be used as the connection member 11, but the configuration of the connection member 11 is not limited to these.

[0036] The method for attaching the connection member 11 to the existing deck 20 is also not particularly limited, as long as it is possible to connect the existing deck 10 and the new deck 20 with a strength that can withstand the load of heavy machinery during construction and the load on the bridge surface such as wheel load when traffic is opened by connecting the existing deck 10 and the new deck 20 with the disclosed structure formed by the disclosed method. Typically, for example, a hole is drilled in the end face facing the gap 30 of the existing deck 10, a rod-shaped connection member 11 is inserted into the hole, and the connection member 11 can be fixed to the existing deck 10 with an adhesive or the like, but the method for attaching the connection member 11 to the existing deck 20 is not limited thereto.

[0037] In the example shown in Fig. 5(a), one existing deck 10 that has not yet been removed is on the left side of the drawing, and two new decks 20 (not shown) that have been placed at the location from which the existing deck 10 was removed are on the right side of the drawing, each fixed onto the main girder 100. Concrete is poured and hardened in the space between these two new decks 20 so as to enclose the joint reinforcing bars 21 protruding from both new decks 20, forming a deck spacer 40 that connects these new decks 20. Meanwhile, a pavement 12 that was laid in the past remains on the top surface of the existing deck 10.

[0038] Next, the pouring step shown in step S12 of Fig. 4 is a step of pouring a filler 32 having fluidity into at least the filling area 31 of the gap 30. The filling area 31 is an area including the connection member 11 protruding from the existing deck 10 into the gap 30 and the joint reinforcing bar 21 protruding from the new deck 20 into the gap 30, as exemplified by the area surrounded by a thick dashed line in Fig. 5(b).

[0039] The joint reinforcing bar 21 protruding from the new slab 20 into the gap 30 is typically a reinforcing bar that protrudes continuously from a portion embedded inside the new slab 20 through the end face of the new slab 20 into the gap 30. However, for example, for construction reasons, it may be necessary to connect the end face of the new slab 20 from which the joint reinforcing bar does not protrude to the end face of the adjacent existing slab 10. In such a case, the joint reinforcing bar 21 protruding from the new slab 20 into the gap 30 can be provided by adding a post-installation reinforcing bar to the preceding reinforcing bar, which is a reinforcing bar embedded in advance inside the new slab 20, using a mechanism such as a mechanical joint before the concrete pouring process.

[0040] Specifically, for example, a sleeve (cap coupler) with a female thread is provided in advance on the end face side of the leading rebar of the newly constructed deck 20, and the male thread portion of the post-installation rebar with a male thread on the end on the base end side (the side of the newly constructed deck 20 with the connecting member) is screwed into it. This allows the post-installation rebar to be connected with sufficient strength to the leading rebar embedded inside the newly constructed deck 20, and the post-installation rebar can be used as the joint rebar 21 protruding into the gap 30.

[0041] The filler 32 is not particularly limited as long as it has a fluidity that allows it to be poured into the filling area 31 and fill the filling area 31 before hardening, and is connected to the connection members 11 and joint reinforcing bars 21 with sufficient strength after hardening to connect the existing deck 10 and the new deck 20 with a strength that can withstand the load of heavy machinery during construction and the load on the bridge surface such as wheel load when traffic is opened. Typically, the filler 32 is concrete and / or mortar. In addition, when performing the casting process, a formwork (not shown) is assembled so as to have a shape corresponding to the shape of the filling area 31 and the members existing around the filling area 31.

[0042] As described above, in the casting process, the filler 32 is poured into at least the filling area 31 of the gap 30. However, from the viewpoint of connecting the existing deck 10 and the new deck 20 with high strength after the filler 32 hardens, it is preferable to pour the filler 32 over the entire area in the width direction (transverse direction or direction perpendicular to the bridge axis) of the gap 30. However, the technology disclosed herein does not exclude the existence of an area (hereinafter also referred to as a "non-filled area") into which the filler 32 is not poured in part of the gap 30, for example, for the purpose of avoiding interference with other components that constitute the bridge.

[0043] In addition, in order to suspend construction in a state where the deck replacement work cannot be completed within the predetermined traffic control period and the existing deck 10 and the new deck 20 are mixed in the construction area and resume traffic according to the traffic control period, it is necessary to lay pavement on the new deck 20 arranged at the removal site of the existing deck 10 and on the upper surface of the gap 30 between the existing deck 10 and the new deck 20. Therefore, if the above-mentioned non-filled area exists in a part of the gap 30, flat plate-shaped members such as steel plates are fixed to the upper surfaces of the existing deck 10 and the new deck 20 by, for example, bolting, so as to cover the area. However, the flat plate-shaped members are arranged only for the purpose of supporting the weight of the pavement and the wheel load when traffic resumes, and do not need to have a mechanical strength large enough to contribute to the connection between the existing deck 10 and the new deck 20.

[0044] Next, the hardening step shown in step S13 in Fig. 4 is a step of hardening the filler poured into the filling area. In Fig. 5(c), the color of the filler 32 poured into the filling area 31 is darkened, indicating that the filler 32 has hardened. The hardened filler 32 contains the connection members 11 protruding from the existing deck 10 and the joint reinforcing bars 21 protruding from the new deck 20, and a temporary connection portion 50 is formed between the existing deck 10 and the new deck 20, which are firmly connected to each other.

[0045] From the viewpoint of shortening the construction period, for example, it is preferable to use a fast-hardening or ultra-fast-hardening filler 32 that requires a short time for hardening. Also, from the viewpoint of sufficiently and reliably transmitting the axial force between the existing deck 10 and the new deck 20 after hardening, it is preferable to use a non-shrinkage filler 32 that has a small amount of shrinkage associated with hardening.

[0046] As mentioned at the beginning of this specification, in deck replacement work using conventional methods, all existing decks laid in the work area are removed, new decks are laid in that area, and the area is paved and otherwise cured before being opened to traffic.

[0047] On the other hand, in the deck replacement work according to the technology disclosed herein, the existing deck 10 and the new deck 20 can be firmly connected by the disclosed structure formed by the disclosed method, so that even if the deck replacement work cannot be completed within the predetermined traffic control period and the existing deck 10 and the new deck 20 are mixed in the construction area, traffic can be resumed according to the traffic control period. In this case, curing such as paving is also required to resume traffic. Figure 5 (d) illustrates a state in which the pavement 22 is laid on the top surface of the new deck 20 so as to be flush with the pavement 12 previously laid on the top surface of the existing deck 10 after the above-mentioned hardening process is completed and the temporary connection portion 50 is formed.

[0048] In the disclosed structure formed by the disclosed method as described above, as illustrated in (c) of Fig. 5, a connecting member 11, which is a member protruding from the existing deck 10, is attached to the existing deck 10 in a gap 30, which is a space between the adjacent existing deck 10 and the new deck 20, and the existing deck 10 and the new deck 20 are connected by a filler 32 hardened in at least a filling area 31 of the gap 30. As described above, the filling area 31 is an area including the connecting member 11 and the joint reinforcing bar 21 protruding from the new deck 20 into the gap 30.

[0049] That is, in the structure disclosed herein, the existing deck 10 and the new deck 20 are firmly connected via the temporary connection part 50, which is a part in which the connection member 11 protruding from the existing deck 10 and the joint reinforcing bar 21 protruding from the new deck 20 are contained within the hardened filler material 32. Therefore, even if the deck replacement work cannot be completed within the predetermined traffic control period and the existing deck 10 and the new deck 20 are mixed in the construction area, according to the structure disclosed herein, traffic can be resumed according to the traffic control period, and the impact of the traffic control associated with the deck replacement work on society can be minimized.

[0050] Therefore, the deck replacement method disclosed herein (the disclosed method) employs the disclosed structure, which makes it possible to suspend construction work when the deck replacement work cannot be completed within the predetermined traffic control period and the existing deck 10 and the newly constructed deck 20 are mixed in the construction area, and to resume traffic according to the traffic control period.

[0051] FIG. 6 is a flowchart showing an example of the flow of each construction process in the disclosed construction method. The disclosed construction method illustrated in FIG. 6 includes a restriction process (step S01) for restricting traffic in a section where the deck replacement work is to be performed, a removal process (step S02) for removing the existing deck, a new installation process (step S03) for installing a new deck at the removal location of the existing deck, and a first determination process (step S04) for determining whether or not replacement of all existing decks with new decks has been completed. If it is determined in the first determination process (step S04) that replacement of all existing decks with new decks has been completed (step S04: Yes), curing such as paving is performed, and then in the next resumption process (step S05), traffic restrictions in the section are lifted and traffic is resumed. The flow of each construction process up to this point is the same as that of the general deck replacement construction method illustrated in FIG. 1.

[0052] However, in the disclosed method illustrated in Fig. 6, the flow of each construction process in the case where replacement of all existing deck slabs with new deck slabs has not been completed in the first determination process (step S04) (step S04: No) is different from that of a general deck replacement method. Specifically, in the disclosed method illustrated in Fig. 6, the removal process (step S02) and the new construction process (step S03) are not repeated unconditionally as in the general deck replacement method illustrated in Fig. 1, but in the next second determination process (step S06), it is determined whether or not replacement of all existing deck slabs with new deck slabs (completion) is impossible within the traffic restriction period.

[0053] If it is determined in the second determination step (step S06) that the construction can be completed within the traffic restriction period (step S06: No), the removal step (step S02), the new construction step (step S03), and the first determination step (step S04) are repeated. On the other hand, if it is determined in the second determination step (step S06) that the construction cannot be completed within the traffic restriction period (step S06: Yes), the method of the present disclosure is executed in the next step S10. That is, the installation step (step S11), the pouring step (step S12), and the hardening step (step S13) illustrated in FIG. 4 are executed, and the structure of the present disclosure is formed, which includes a temporary connection portion 50 that firmly connects the adjacent existing deck 10 and new deck 20.

[0054] As described above, according to the disclosed structure, even if the deck replacement work is not completed and the existing deck 10 and the new deck 20 are mixed in the work area, the bridge can withstand the load of heavy machinery during construction and the load on the bridge surface such as wheel load when traffic is opened. Therefore, after curing such as paving is performed, the traffic restrictions in the area can be lifted in the next reopening process (step S05) and traffic can be resumed.

[0055] Incidentally, as described at the beginning of this specification, the traffic control period for the deck replacement work is set in advance through consultation with related organizations such as traffic managers (police). In addition, the construction volume per day can be estimated in advance based on, for example, the number of workers and heavy machinery. Furthermore, the process that can be performed within the preset traffic control period can also be estimated in advance based on the traffic control period and the construction volume. Therefore, whether or not it is possible to complete the deck replacement work within the traffic control period by the process set based on the traffic control period and the construction volume can be determined in advance based on the traffic control period and the construction volume. If it is determined that the deck replacement work can be completed within the traffic control period, the deck replacement work may be performed in the same manner as the general deck replacement method illustrated in FIG. 1.

[0056] On the other hand, if it is determined that the deck replacement work cannot be completed within the traffic control period due to the process set based on the traffic control period and the construction volume, the disclosed method may be executed at the time when the set process is completed, the deck replacement work may be suspended, and traffic may be resumed. In this case, the remaining existing deck 10 in the next traffic control period to be newly set will be replaced with a new deck 20. As mentioned above, the next traffic control period will be set after a fairly long period of time, such as several months, has passed. Therefore, the existing deck 10 and the new deck 20 need to be firmly connected.

[0057] Fig. 7 is a flowchart showing an example of the flow of each construction process in the disclosed construction method configured to execute the disclosed method at the time when the process that can be executed within the traffic control period set in advance as described above is completed. The disclosed construction method illustrated in Fig. 7 is applied when it is determined that the deck replacement work cannot be completed within the traffic control period due to the process set based on the traffic control period and the construction volume. That is, in the disclosed construction method illustrated in Fig. 7, instead of the first judgment process (step S04) and the second judgment process (step S06) in the disclosed construction method illustrated in Fig. 6, a third judgment process (step S07) is provided to judge whether the process set according to the traffic control period and the construction volume has been completed.

[0058] If the process set according to the traffic control period and the construction amount in the third determination step (step S07) has not yet been completed (step S07: No), the removal process (step S02), the new construction process (step S03), and the third determination step (step S07) are repeated. On the other hand, if the process set according to the traffic control period and the construction amount in the third determination step (step S07) has been completed (step S07: Yes), the method of the present disclosure is executed in the next step S10. That is, the installation process (step S11), the pouring process (step S12), and the hardening process (step S13) illustrated in FIG. 4 are executed, and the structure of the present disclosure having the provisional connection portion 50 that firmly connects the adjacent existing deck 10 and the new deck 20 is formed.

[0059] As described above, according to the disclosed construction method including the examples shown in Figures 6 and 7, the disclosed structure is formed with a temporary connection part 50 that firmly connects adjacent existing deck 10 and new deck 20 by executing the disclosed construction method at the time when the process that can be carried out within the preset traffic control period is completed. Therefore, according to the disclosed construction method, if the deck replacement work cannot be completed within the preset traffic control period, the existing deck 10 and the new deck 20 can be left mixed in the construction area, and after curing such as paving is carried out, the traffic control in the area can be lifted and traffic can be resumed.

[0060] 8 to 10 are schematic perspective views illustrating the construction procedure of the deck replacement work by the disclosed construction method. FIG. 8 illustrates a state in which a removal process (step S02) is performed in which the existing deck 10 is removed using heavy machinery (not shown). FIG. 9 illustrates a state in which a new deck 20 is installed at the removal location of the existing deck 10 in a new installation process (step S03). More specifically, as illustrated in FIG. 9, the dowels 102 provided at a predetermined pitch on the upper flange 101 of the main girder 100 are inserted into the dowel holes 23 formed in the new deck 20, and a filler such as mortar is poured into the dowel holes 23, thereby fixing the main girder 100 and the new deck 20. Thereafter, as illustrated in FIG. 10, a pavement 22 is laid on the upper surface of the new deck 20, and the traffic restrictions in the section are lifted, making it possible to resume traffic.

[0061] Fig. 11 is a schematic cross-sectional view illustrating a state in which the mounting step (step S11), pouring step (step S12), and hardening step (step S13) included in the disclosed method (step S10) executed in the disclosed construction method are performed, and the disclosed structure is formed with a temporary connection part 50 that firmly connects adjacent existing deck 10 and new deck 20. Note that Fig. 11 illustrates a state in which, after the temporary connection part 50 is formed, pavement 22 is laid on the top surface of the new deck 20 so as to be flush with pavement 12 previously laid on the top surface of the existing deck 10.

[0062] The dashed line EP in Fig. 11 represents the end of the construction section in the process carried out during the current traffic control period P1. That is, the portion to the right of the dashed line EP in the drawing includes the temporary connection portion 50 formed in the gap 30 between the new deck 20 installed by the process carried out during the current traffic control period P1 and the existing deck 10 adjacent to the new deck 20. On the other hand, the portion to the left of the dashed line EP in the drawing is the portion where the existing deck 10 that was not removed during the current traffic control period P1 is installed, and is the portion that will be replaced with the new deck 20 in the next traffic control period P2 that is newly set.

[0063] That is, according to the disclosed construction method, if the deck replacement work cannot be completed within the preset traffic control period P1, the disclosed method is executed in a state where the existing deck 10 and the new deck 20 are mixed in the construction area. As a result, as shown in FIG. 12(a), a structure disclosed herein is formed that includes a temporary connection portion 50 that firmly connects the adjacent existing deck 10 and the new deck 20, and after curing such as paving is performed, the traffic control in the area can be temporarily lifted to resume traffic. Then, when the next new traffic control period P2 is set, the remaining existing deck 10 can be replaced with the new deck 20, as shown in FIG. 12(b), so that the deck replacement work in the construction area can be divided into multiple parts.

[0064] When the remaining existing deck 10 is replaced with the new deck 20 in the next new traffic control period P2, the hardened filler material 32 constituting the temporary connection portion 50 connecting the existing deck 10 and the new deck 20 is also removed by a process such as so-called "chipping." At this time, from the viewpoint of minimizing damage to the new deck 20 installed during the current traffic control period P1 and / or from the viewpoint of increasing the efficiency of removing the hardened filler material 32, it is preferable to use, for example, a water jet.

[0065] However, depending on the configuration and / or use of the building that is the target of the deck replacement work, it may be desired to further strengthen the connection between the adjacent existing deck 10 and the new deck 20. For example, when an upward stress acts on a deck that contains a mixture of the existing deck 10 and the new deck 20, causing the deck to bend so as to be convex upward, a tensile stress acts on the upper side of the provisional connection 50 that connects the existing deck 10 and the new deck 20, and a compressive stress acts on the lower side. Conversely, when a downward stress such as a load acts on a deck that contains a mixture of the existing deck 10 and the new deck 20, causing the deck to bend so as to be convex downward, a compressive stress acts on the upper side of the provisional connection 50, and a tensile stress acts on the lower side.

[0066] In the above situation, the filler 32 may be appropriately selected so that the filler 32 after hardening has a strength sufficient to withstand the compressive stress acting on the temporary connection 50. On the other hand, for the tensile stress acting on the temporary connection 50, it is preferable to add a further member that contributes to maintaining the connection between the existing deck 10 and the new deck 20 against the stress, in addition to the connection member 11 protruding from the existing deck 10, the joint reinforcing bar 21 protruding from the new deck 20, and the filler 32 after hardening.

[0067] Therefore, the disclosed method of another embodiment further includes a reinforcing step of fixing a reinforcing member 60 to the existing deck 10 and the new deck 20 so as to span the gap 30 on the upper and / or lower side of the gap 30, which is the space between the adjacent existing deck 10 and new deck 20.

[0068] Fig. 13 is a schematic enlarged cross-sectional view of an example of the configuration of the disclosed structure formed by the disclosed method according to this embodiment, showing the vicinity of a temporary connection part 50 connecting the existing deck 10 and the new deck 20. As illustrated in Fig. 13, the disclosed structure according to this embodiment further includes reinforcing members 60 (61 and 62) fixed to the existing deck 10 and the new deck 20 so as to span the gap 30 on both the upper and lower sides of the gap 30.

[0069] In the example shown in FIG. 13, since the new deck 20 is thicker than the existing deck 10, a step exists between the existing deck 10 and the provisional joint 50 on the upper side of the gap 30. For this reason, an adjustment material 63 that fills the step is interposed between the upper side reinforcing member 61 and the existing deck 10 to fix the reinforcing member 61 to the existing deck 10. Such a step between the existing deck 10 and the provisional joint 50 may exist not only on the upper side of the gap 30 but also on the lower side. In this way, when a step exists on the lower side of the gap 30, an adjustment material that fills the step can be interposed between the lower side reinforcing member 62 and the existing deck 10 to fix the reinforcing member 62 to the existing deck 10.

[0070] 13 is merely an example, and it is not necessary to provide the reinforcing member 60 on both the upper and lower sides of the gap 30. For example, if it is expected that tensile stress acts only on the upper side of the temporary connection portion 50, the reinforcing member 60 may be provided only on the upper side of the gap 30. Conversely, if it is expected that tensile stress acts only on the lower side of the temporary connection portion 50, the reinforcing member 60 may be provided only on the lower side of the gap 30. In addition, if it is possible to sufficiently firmly connect the existing deck 10 and the new deck 20 only by the temporary connection portion 50 composed of the connection member 11 protruding from the existing deck 10, the joint reinforcing bar 21 protruding from the new deck 20, and the hardened filler material 32, it is not necessary to provide the reinforcing member 60 as in the first embodiment.

[0071] The specific configuration of the reinforcing member 60 is not particularly limited as long as it is possible to increase the connection strength between the existing deck 10 and the new deck 20 by connecting the existing deck 10 and the new deck 20 to straddle the gap 30 on the upper and / or lower sides of the gap 30 in the disclosed structure formed by the disclosed method according to this embodiment. Typically, a rod-shaped or plate-shaped member having high mechanical strength, such as a channel material, a flat bar, a steel plate, or a carbon fiber sheet, can be used as the reinforcing member 60, but the material constituting the reinforcing member 60 and the shape of the reinforcing member 60 are not limited to these.

[0072] Furthermore, the specific means for fixing the reinforcing member 60 to the existing deck 10 and the new deck 20 is also not particularly limited as long as it is possible to increase the connection strength between the existing deck 10 and the new deck 20. Typically, when a channel material, a flat bar, a steel plate, or the like is used as the reinforcing member 60, the reinforcing member 60 can be fixed to the existing deck 10 and the new deck 20 by a fastening method such as bolting. Furthermore, when a carbon fiber sheet, or the like is used as the reinforcing member 60, the reinforcing member 60 can be fixed to the existing deck 10 and the new deck 20 by an adhesive, or the like.

[0073] As is clear from the above description, by applying the disclosed method according to this embodiment to the disclosed construction method, it is also possible to increase the connection strength between the existing deck 10 and the new deck 20. That is, the disclosed construction method according to this embodiment is a deck replacement construction method characterized by further including a reinforcing step of fixing reinforcing members 60 to the existing deck 10 and the new deck 20 so as to span the gap 30 on the upper and / or lower sides of the gap 30.

[0074] According to the technology disclosed in this embodiment, the connection strength between the existing deck 10 and the new deck 20 can be further increased, thereby further increasing the strength and durability of the deck when traffic is opened in the period between the current traffic restriction period P1 and the next new traffic restriction period P2.

[0075] As described above, if the deck replacement work cannot be completed during the current traffic control period P1 and the existing deck 10 and the new deck 20 are mixed in the work area, the work is suspended, traffic is resumed according to the traffic control period, and then the remaining existing deck 10 is replaced with the new deck 20 during the next new traffic control period P2, the hardened filler 32 that constitutes the temporary connection 50 is also removed. At this time, from the viewpoint of reducing the labor required to remove the hardened filler 32 and minimizing damage to the new deck 20 that was installed during the current traffic control period P1, it is preferable to minimize adhesion between the end face of the new deck 20 and the filler 32.

[0076] Therefore, the disclosed method of another embodiment further includes an edge cutting process, prior to the pouring process (step S12), in which a portion of the end face facing the filling area 31 of the newly constructed deck 20 is covered with an edge cutting material 70, which is a material that reduces the adhesion strength between the filling material 32 and the end face.

[0077] 14 is a schematic enlarged cross-sectional view of an example of the configuration of the disclosed structure formed by the disclosed method according to this embodiment, showing the vicinity of the provisional joint 50 connecting the existing deck 10 and the new deck 20. As illustrated in FIG. 14, in the disclosed structure according to this embodiment, an edge cutter 70 (see thick black solid line) which is a material that reduces the adhesive strength between the end face of the new deck 20 facing the filling area 31 and the filler 32 is disposed between a part of the end face of the new deck 20 and the filler 32.

[0078] In addition, FIG. 14 illustrates the configuration of the disclosed structure according to the present embodiment in the case where it is assumed that compressive stress acts on the upper side of the temporary connection part 50 connecting the existing deck 10 and the new deck 20 and tensile stress acts on the lower side. In this case, it is not desirable to reduce the adhesive strength between the new deck 20 and the filler 32 on the lower side of the temporary connection part 50 where tensile stress is assumed to act. Therefore, in the example shown in FIG. 14, only the upper side of the end face facing the filling area 31 of the new deck 20 is covered by the edge cut material 70. Conversely to the example shown in FIG. 14, when it is assumed that tensile stress acts on the upper side of the temporary connection part 50 and compressive stress acts on the lower side, it is desirable that only the lower side of the end face facing the filling area 31 of the new deck 20 is covered by the edge cut material 70.

[0079] The edge cutting material 70 is not particularly limited as long as it can reduce the adhesion strength between the end face of the new deck 20 and the filler 32 and can cover a predetermined range of the end face of the new deck 20. Specific examples of the edge cutting material 70 include, for example, a resin sheet, a resin tape, and a resin paint. The method of covering a predetermined range of the end face of the new deck 20 with the edge cutting material 70 is also not particularly limited, and can be appropriately selected according to the member or material adopted as the edge cutting material 70. For example, when a resin sheet or a resin tape is adopted as the edge cutting material 70, the resin sheet or the resin tape as the edge cutting material 70 can be attached to a predetermined range of the end face of the new deck 20 with an adhesive or the like. In addition, when a resin paint is adopted as the edge cutting material 70, the resin paint as the edge cutting material 70 can be applied to a predetermined range of the end face of the new deck 20 by a method such as spray application or brush application, and then dried.

[0080] As is clear from the above explanation, by applying the disclosed method according to this embodiment to the disclosed construction method and covering a predetermined range of the end face of the new deck 20 with the edge cutting material 70, it is possible to reduce the labor required to remove the hardened filler material 32 and minimize damage to the new deck 20 installed during the current traffic control period P1. In other words, the disclosed construction method according to this embodiment is a deck replacement construction method characterized by further including an edge cutting step of covering a part of the end face facing the filling area 31 of the new deck 20 with the edge cutting material 70, which is a material that reduces the adhesive strength between the filler material 21 and the end face, prior to the pouring step (step S12).

[0081] According to the technology disclosed in this embodiment, adhesion between the end face of the newly constructed deck 20 and the filler 32 can be kept to a necessary minimum, thereby reducing the effort required to remove the filler 32 after it has hardened and minimizing damage to the newly constructed deck 20 installed during the current traffic control period P1.

[0082] <effect> As described above, in the technology disclosed herein, in a situation where the deck replacement work has not been completed, the connection member 11 is attached to the existing deck 10 so as to protrude into the gap 30 between the adjacent existing deck 10 and the new deck 20, and the filler 32 is poured into the filling area 31, which is an area including at least the connection member 11 in the gap 30 and the joint reinforcing bar 21 protruding from the new deck 20, and hardened. As a result, according to the technology disclosed herein, even if the deck replacement work has not been completed and the existing deck 10 and the new deck 20 are mixed in the construction area, the existing deck 10 and the new deck 20 can be connected with sufficient strength to enable traffic to be resumed for a long period of time. Therefore, even if it is impossible to complete the deck replacement work within the predetermined traffic control period, traffic can be resumed according to the traffic control period, and the impact of the traffic control associated with the deck replacement work on society can be minimized.

[0083] Furthermore, according to the technology of the present disclosure in other embodiments, the connection strength between the existing deck 10 and the new deck 20 can be further increased, so that the strength and durability of the deck can be further increased when traffic is opened in the period between the current traffic control period P1 and the next new traffic control period P2. In addition, according to the technology of the present disclosure in other embodiments, the adhesion between the end face of the new deck 20 and the filler 32 can be kept to a necessary minimum, so that the labor required to remove the filler 32 after hardening can be reduced and damage to the new deck 20 installed in the current traffic control period P1 can be minimized.

[0084] For the purpose of explaining the contents of the present disclosure, a number of embodiments having specific configurations have been described above, sometimes with reference to the accompanying drawings. However, the scope of the present disclosure should not be construed as being limited to these exemplary embodiments, and it goes without saying that appropriate modifications can be made within the scope of the claims and the matters described in the specification.

[0085] For example, in Figures 8 to 12 referred to in the explanation of the disclosed construction method, an example is shown in which the disclosed method, the disclosed structure, and the disclosed construction method (the disclosed technology) are applied when the existing deck slab and the new deck slab are adjacent in the longitudinal direction of the road or the bridge axis direction of the bridge, but the direction in which the existing deck slab and the new deck slab are adjacent is not limited to the above. For example, the disclosed technology can also be applied when the existing deck slab and the new deck slab are adjacent in a direction other than the above examples, such as the transverse direction of the road or the direction perpendicular to the bridge axis of the bridge. [Explanation of symbols]

[0086] 10...Existing deck, 11...Connection member, 12...Pavement, 20...New deck, 21...Joint steel bar, 22...Pavement, 23...Dowel hole, 30...Gap, 31...Filling area, 32...Filling material, 40...Deck spacer, 50...Temporary connection, 60...Reinforcing member, 61...Reinforcing member on upper surface, 62...Reinforcing member on lower surface, 70...Edge cutting member, 100...Main girder, 101...Upper flange, 102...Dowel, 200...Heavy machinery

Claims

1. In deck replacement work, an existing deck is removed and a new deck is installed in the location where the existing deck was removed. An installation process of attaching a connection member, which is a member protruding from the existing deck, to the existing deck in a gap between the adjacent existing deck and the new deck; A pouring step of pouring a filler having fluidity into a filling area which is an area including at least the connection member of the gap and a joint reinforcing bar protruding from the new deck into the gap; and a hardening step of hardening the filling material poured into the filling region; Including, A method for increasing the bonding strength between an existing deck and a newly constructed deck, comprising:

2. A method for increasing the bonding strength between an existing deck and a new deck according to claim 1, A reinforcing step of fixing a reinforcing member to the existing deck and the new deck so as to span the gap on the upper surface side and / or the lower surface side of the gap; Further comprising: A method for increasing the bonding strength between an existing deck and a newly constructed deck, comprising:

3. A method for increasing the bonding strength between an existing deck and a new deck according to claim 1 or 2, A cutting step of covering a part of the end surface of the new deck facing the filling area with a cutting material which is a material that reduces the adhesive strength between the filling material and the end surface, prior to the pouring step; Further comprising: A method for increasing the bonding strength between an existing deck and a newly constructed deck, comprising:

4. In deck replacement work, an existing deck is removed and a new deck is installed in the location where the existing deck was removed. A connecting member, which is a member protruding from the existing deck in a gap that is a space between the adjacent existing deck and the new deck, is attached to the existing deck, The existing deck and the new deck are connected by a filler hardened in a filling area that is an area including at least the connecting member and the joint reinforcing bar protruding from the new deck into the gap. A structure that enhances the bonding strength between the existing deck and the newly constructed deck.

5. A structure for enhancing the bonding strength between an existing deck and a new deck as described in claim 4, Further provided is a reinforcing member fixed to the existing deck and the new deck so as to span the gap on the upper surface side and / or the lower surface side of the gap, A structure that enhances the bonding strength between the existing deck and the newly constructed deck.

6. A structure for enhancing the bonding strength between an existing deck and a new deck as described in claim 4 or 5, An edge cutter, which is a material that reduces the adhesive strength between the end face of the new deck facing the filling area and the filler, is arranged so as to be interposed between a part of the end face of the new deck and the filler. A structure that enhances the bonding strength between the existing deck and the newly constructed deck.

7. A traffic control process to restrict traffic in the area where the deck replacement work is to be carried out; A removal process to remove the existing deck, A new installation process for installing a new deck at the removal site of the existing deck; and a restarting step of lifting traffic restrictions in the section and restarting traffic; A deck replacement method including: An installation process of attaching a connection member, which is a member protruding from the existing deck, to the existing deck in a gap between the adjacent existing deck and the new deck; A pouring step of pouring a filler having fluidity into a filling area which is an area including at least the connection member of the gap and a joint reinforcing bar protruding from the new deck into the gap; and a hardening step of hardening the filling material poured into the filling region; Further comprising: A deck replacement method characterized by the above.

8. The deck replacement method according to claim 7, A reinforcing step of fixing a reinforcing member to the existing deck and the new deck so as to span the gap on the upper surface side and / or the lower surface side of the gap; Further comprising: A deck replacement method characterized by the above.

9. The deck replacement method according to claim 7 or 8, A cutting step of covering a part of the end surface of the new deck facing the filling area with a cutting material which is a material that reduces the adhesive strength between the filling material and the end surface, prior to the pouring step; Further comprising: A deck replacement method characterized by the above.

10. A traffic control process for the area where the deck replacement work is to be carried out; A removal process to remove the existing deck, A new installation process of installing a new deck at the removal site of the existing deck; and a restarting step of lifting traffic restrictions in the section and restarting traffic; A deck replacement method including: An installation process of attaching a connection member, which is a member protruding from the existing deck, to the existing deck in a gap between the adjacent existing deck and the new deck; A pouring step of pouring a filler having fluidity into a filling area which is an area including at least the connection member of the gap and a joint reinforcing bar protruding from the new deck into the gap; and a hardening step of hardening the filling material poured into the filling region; Further comprising: By doing so, Lifting traffic restrictions in the section and resuming traffic even if replacement of all existing decks in the section with new decks has not been completed. A deck replacement method characterized by the above.

11. The deck replacement method according to claim 10, A reinforcing step of fixing a reinforcing member to the existing deck and the new deck so as to span the gap on the upper surface side and / or the lower surface side of the gap; Further comprising: A deck replacement method characterized by the above.

12. The deck replacement method according to claim 10 or 11, Prior to the pouring step, a cutting step is performed to cover a part of the end surface of the new deck facing the filling area with a cutting material which is a material that reduces the adhesive strength between the filling material and the end surface; Further comprising: A deck replacement method characterized by the above.

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