JP7519520B2 - How to relocate the deck manufacturing facility - Google Patents

Description

The present invention relates to a method for relocating a deck manufacturing facility that produces precast concrete decks from a source to a destination.

Bridges such as road bridges are composed of, for example, multiple piers, multiple bridge girders (H-shaped steel) that each straddle the multiple piers and extend in the bridge axis direction, and a deck that is arranged straddling the multiple girders. The deck is made of, for example, reinforced concrete. Such decks may need to be replaced (removal of the existing deck and installation of a new deck) due to reasons such as deterioration of the concrete after many years of use and corrosion of the internal reinforcing bars. In this regard, Patent Document 1 uses a precast PC deck manufactured in a factory as the new deck.

JP 2009-264040 A

However, the deck manufacturing facilities (facilities that manufacture precast concrete decks), which correspond to the aforementioned "factories," are generally stationary, and no consideration has been given to the overall relocation (relocation) of the facilities.

In view of this situation, the present invention aims to provide a method for relocating deck construction facilities.

Therefore, the first and second aspects of the method for relocating a deck slab fabrication facility according to the present invention are methods for relocating a deck slab fabrication facility that fabricates a precast concrete deck from a source to a destination. In the first aspect of the method for relocating a deck slab fabrication facility according to the present invention, the layout of the equipment of the deck slab fabrication facility at the source is different from the layout of the equipment of the deck slab fabrication facility at the destination. In the second aspect of the method for relocating a deck slab fabrication facility according to the present invention, the layout of the equipment of the deck slab fabrication facility at the source is the same as the layout of the equipment of the deck slab fabrication facility at the destination. In the first and second aspects of the method for relocating a deck slab fabrication facility according to the present invention, the deck slab fabrication facility includes a tensioning frame for applying tension to the tension members that constitute the deck, and the tensioning frame has a pair of rectangular frame structures that function as reaction frames for applying tension to the tension members, and each of the pair of rectangular frame structures includes two columns, one upper beam, and one lower beam.

According to a first aspect of the method for relocating a deck fabrication facility of the present invention, it is possible to provide a method for relocating a deck fabrication facility in which the layout of the equipment can be changed when the deck fabrication facility is relocated. According to a second aspect of the method for relocating a deck fabrication facility of the present invention, it is possible to provide a method for relocating a deck fabrication facility in which the layout of the equipment is not changed when the deck fabrication facility is relocated.

1 is a plan view of a first example of a deck manufacturing facility according to an embodiment of the present invention; FIG. 2 is a plan view of a deck construction section constituting a first example of the deck construction facility. 2. A-A arrow view of FIG. FIG. 1 is a side view of a tension rack according to one embodiment of the present invention; FIG. 1 is a top view of a tension rack in the embodiment; A flowchart showing a deck manufacturing method according to the embodiment. A flowchart showing an example of a deck manufacturing process in the embodiment. FIG. 1 is an explanatory diagram of an example of a deck manufacturing process in the embodiment. FIG. 1 is an explanatory diagram of an example of a deck manufacturing process in the embodiment. FIG. 1 is an explanatory diagram of an example of a deck manufacturing process in the embodiment. FIG. 2 is a plan view of a second example of the deck manufacturing facility according to the embodiment; FIG. 2 is a plan view of a deck construction section constituting a second example of the deck construction facility. FIG. 2 is a side view of a deck construction section constituting a second example of the deck construction facility. 12 taken along the line B-B in FIG. FIG. 1 shows examples of temporary locations for the first and second examples of the deck fabrication facility. FIG. 1 shows the second example of the deck fabrication facility temporarily installed on the existing deck. A flowchart showing a method for relocating a deck slab manufacturing facility in the embodiment. FIG. 1 shows a first example and a second example of a deck replacement project according to the embodiment. FIG. 11 shows a third example of a deck replacement project in the embodiment.

The following describes an embodiment of the present invention with reference to the drawings. Note that the same or corresponding parts in all the drawings are given the same reference numerals.

Figure 1 is a plan view of a deck production facility 10 corresponding to a first example of a deck production facility 100 in one embodiment of the present invention. Figure 2 is a plan view of the deck production section 11a constituting the deck production facility 10. Figure 3 is a view taken along the line A-A in Figure 2. For ease of explanation, the following description defines east, west, north and south as shown in Figures 1 to 3, but it goes without saying that the relationship between each component of the deck production facility 10 and east, west, north and south is not limited to that shown in the figures.

The deck construction facility 10 is a facility for manufacturing decks 1 made of precast concrete. The deck construction facility 10 is composed of one or more deck construction sections 11. In the example shown in FIG. 1, the deck construction facility 10 is composed of three deck construction sections 11a to 11c. The three deck construction sections 11a to 11c are arranged in a line in the east-west direction. It goes without saying that the number of deck construction sections 11 constituting the deck construction facility 10 is not limited to three. The same applies to the deck construction facility 10' described below.

The deck construction section 11a, located on the west side, has a rebar assembly yard 12, a deck construction yard 13, a washout and inspection yard 14, a stockyard 15, a generator 16, a boiler 17, an operation panel 18, a bending strength testing device 19, and a lifting device 20.

In the reinforcing bar assembly yard 12, the assembly work (ground assembly work) of the reinforcing bars 2 that make up the deck 1 is carried out. In order to protect against rain and wind during the assembly work of the reinforcing bars 2, the reinforcing bar assembly yard 12 is provided with an expandable tent house 21 that can surround the area where the assembly work is carried out. This tent house 21 extends in the north-south direction and is expandable in the north-south direction. By expanding and contracting this tent house 21, the degree to which the tent house 21 is opened or closed can be appropriately adjusted. When this tent house 21 is in its most contracted state, it is in its fully open state. On the other hand, when this tent house 21 is in its most extended state, it is in its fully closed state. The tent house 21 is configured to be movable.

In the deck slab production yard 13, the work of producing the deck 1 including the reinforcing bars 2 assembled in the reinforcing bar assembly yard 12 is carried out. In order to protect against rain and wind during the production work of the deck 1, the deck slab production yard 13 is provided with an expandable tent house 22 that can surround the area where the production work is carried out. The tent house 22 extends in the north-south direction and is divided into two parts, north and south, at the center in the north-south direction, and each divided part can be expanded and contracted in the north-south direction. By expanding and contracting each divided part of the tent house 22, the degree of opening and closing of the tent house 22 can be appropriately adjusted. When each divided part of the tent house 22 is in the most contracted state, the tent house 22 is in a fully open state. On the other hand, when each divided part of the tent house 22 is in the most extended state, the tent house 22 is in a fully closed state. The tent house 22 is configured to be movable.

In the screening/inspection yard 14, screening work for all deck slabs 1 is carried out, as well as dimensional inspection and visual inspection of all deck slabs 1. Then, of these deck slabs 1, those that are subject to bending strength testing are temporarily stored in the screening/inspection yard 14. Meanwhile, those that are not subject to bending strength testing are transported to the stockyard 15 and stored.

The flexural strength test device 19 performs a flexural strength test on the deck 1 that is the subject of the flexural strength test and is temporarily placed in the screening and inspection yard 14. The deck 1 that has undergone this test is transported to the stockyard 15 for storage. Here, the flexural strength test device 19 is configured to be portable. The flexural strength test device 19 corresponds to the "equipment for inspecting the quality of decks" of the present invention.

The lifting device 20 is, for example, a mobile crane such as a rough terrain crane. The lifting device 20 has at least the following roles (1) to (5).
(1) The role of transporting the reinforcing bars 2 assembled in the reinforcing bar assembly yard 12 to the deck slab production yard 13.
(2) The role of transporting the deck 1 from the deck manufacturing yard 13 to the washing and inspection yard 14.
(3) The role of transporting the deck 1 from the washing/inspection yard 14 to the bending strength testing device 19.
(4) The role of transporting the deck 1 from the bending strength testing device 19 to the stockyard 15.
(5) The role of transporting the deck 1 from the washing/inspection yard 14 to the stockyard 15.

A tension frame 30 is installed on the deck slab production yard 13 so as to be surrounded by a tent house 22 in a fully closed state.
The schematic configuration of the tensioning frame 30 will be described with reference to Figures 4 and 5. Figures 4 and 5 are a side view and a top view of the tensioning frame 30. Here, the dashed dotted line shown in Figure 4 indicates the center position of the deck 1 to be manufactured, along which the tensioning members 3 such as PC steel members (see Figures 8 to 10 described later) can be arranged. Also, the two-dotted dashed line shown in Figure 5 indicates the position of the deck 1 to be manufactured.

The tensioning frame 30 is also called a pretensioning frame. The tensioning frame 30 is used to apply tension to the tension members 3 that make up the deck 1, and corresponds to the "equipment for applying tension to the tension members that make up the deck" of the present invention.

The tensioning frame 30 includes four columns 31, two upper beams 32, and two lower beams 33 erected on the deck construction yard 13. The columns 31 are arranged at the four corners of a rectangular imaginary area with the long side in the north-south direction and the short side in the east-west direction, and each extends in the vertical direction. The lower ends of the columns 31 are fixed to the concrete surface of the deck construction yard 13, for example, via anchor bolts. The upper beam 32 extends in the north-south direction and both ends are connected to the upper ends of the columns 31. The lower beam 33 extends in the north-south direction and both ends are connected to the lower ends of the columns 31. Therefore, the tensioning frame 30 has a rectangular frame structure with two columns 31, one upper beam 32, and one lower beam 33.

A plurality of vertical beams 34 are provided so as to straddle between the upper beam 32 and the lower beam 33. The upper end of each vertical beam 34 is connected to the upper beam 32, and the lower end is connected to the lower beam 33. The multiple vertical beams 34 are arranged at intervals from one another in the north-south direction.
A plurality of cross beams 35 are provided so as to straddle the two upper beams 32. The cross beams 35 extend in the east-west direction. The plurality of cross beams 35 are arranged in the north-south direction at intervals. The cross beams 35 are detachably fixed to the upper beams 32.

An anchoring beam 36 is provided so as to straddle the vertical center of the two pillars 31 located on the north side. The anchoring beam 36 is located north of the two pillars 31 located on the north side. The eastern end of the anchoring beam 36 is fixed to the vertical center of the northeastern pillar 31, and the western end is fixed to the vertical center of the northwestern pillar 31. The anchoring beam 36 has multiple holes (not shown) formed therein for passing the tension members 3 through.

A support frame portion 37a for supporting the fixing beam 36 is connected to the two pillars 31 located on the north side. The support frame portion 37a is located north of the two pillars 31 located on the north side.

The anchoring beam 39 is provided via a plurality of jacks 38 (four in this embodiment) so as to straddle the vertical center of the two columns 31 located on the south side. The jacks 38 are located south of the two columns 31 located on the south side, and the anchoring beam 39 is located south of the jacks 38. The eastern end of the anchoring beam 39 is fixed to the vertical center of the southeastern column 31 via two upper and lower jacks 38, and the western end is fixed to the vertical center of the southwestern column 31 via two upper and lower jacks 38. The anchoring beam 39 has a plurality of holes (not shown) for passing the tension material 3 through. The jacks 38 are, for example, hydraulic jacks, and can be freely extended and retracted in the north-south direction. The extension and retraction operation of the jacks 38 can be operated by an operator using the operation panel 18.

A support frame portion 37b for supporting the anchor beam 39 is connected to the two pillars 31 located on the south side. The support frame portion 37b is located south of the two pillars 31 located on the south side. The support frame portion 37b can also function as a guide portion that guides the movement of the anchor beam 39 in the north-south direction caused by the extension and contraction of the jack 38.

Conventionally, the reaction base used to apply tension to the tension member 3 was a concrete block with a solid foundation, making it difficult to relocate. In this regard, the tension base 30 has a rectangular frame structure with two pillars 31, one upper beam 32, and one lower beam 33, so the pillars 31 themselves and their support structure can be simplified compared to the reaction base described above, and the tension base 30 can be easily relocated. Therefore, the tension base 30 is configured to be relocatable.

Returning to FIG. 1, the deck slab construction section 11c located on the east side is similar to the deck slab construction section 11a on the west side with the bending strength test device 19 omitted.
The deck construction section 11b, located between the deck construction sections 11a and 11c, is similar to the deck construction section 11c on the east side, with the east-west orientation swapped.

In the deck construction facility 10, the extension direction (north-south direction) of each tent house 21, 22 of the deck construction sections 11a-11c is perpendicular to the arrangement direction (east-west direction) of the deck construction sections 11a-11c. Therefore, in the deck construction facility 10, the deck construction sections 11a-11c are arranged in parallel.

Next, a method for manufacturing the deck 1 will be described with reference to Figs. 6 to 10 in addition to Figs. 1 to 5 described above. Fig. 6 is a flowchart showing a method for manufacturing the deck 1. Fig. 7 is a flowchart showing an example of the deck manufacturing process (step S1) in Fig. 6. Figs. 8(a) to 10(f) are explanatory diagrams of an example of the deck manufacturing process (step S1) in Fig. 6.
This deck construction method may be carried out in each of the deck construction sections 11a to 11c.

As shown in FIG. 6, in the method for manufacturing the deck 1, first, in step S1, the deck 1 is manufactured (deck manufacturing process). The deck manufacturing process can be carried out in a rebar assembly yard 12 and a deck manufacturing yard 13.

In an example of the deck manufacturing process shown in FIG. 7, as step S11, as shown in FIG. 8(A), a steel formwork 4 is assembled in the deck manufacturing yard 13 (formwork assembly process). In this embodiment, the formwork 4 is a rectangular box with a bottom and an open top, but it may also be a rectangular cylinder with an open top and bottom. If the formwork 4 is a rectangular cylinder, the bottom opening of the formwork 4 may be blocked by a concrete floor or a manufacturing bed. The formwork 4 is assembled in the tensioning frame 30. In this embodiment, two formworks 4 are arranged side by side in the north-south direction in the tensioning frame 30, but the number of formworks 4 arranged in the tensioning frame 30 is not limited to two, and may be one or three or more.

In parallel with this, in step S21, rebar 2 is assembled (ground assembly) in the rebar assembly yard 12.

Next, in step S12, as shown in FIG. 8 (A), the rebars 2 assembled in the rebar assembly yard 12 are set in the formwork 4, and tension members 3 are set so as to pass through the gaps between the rebars 2 (rebar and tension member placement process). Here, the tension members 3 are, for example, PC steel members, and extend in the north-south direction. One end of the tension member 3 is fixed to the anchor beam 36 by a fixing device 5, and the other end is fixed to the anchor beam 39 by a fixing device 6.

Next, in step S13, as shown in FIG. 9 (c), the jack 38 is extended to apply tension to the tension member 3 (tension member tensioning process). In other words, the tension member 3 is pulled.

Next, in step S14, while the tension members 3 are kept tensioned, concrete C is poured into the formwork 4 as shown in FIG. 9 (E) (concrete pouring process). Here, the deck 1 is composed of the concrete C, the reinforcing bars 2, and the tension members 3.

Next, in step S15, the poured concrete C is cured (curing process). In this curing process, for example, steam curing is performed. In this steam curing, the formwork 4 filled with the concrete C is covered with a sheet or the like, and steam from the boiler 17 is introduced inside the sheet. This forcibly increases the temperature of the concrete C inside the formwork 4, thereby promoting the development of strength. Note that a temperature control device may be provided to maintain the temperature inside the sheet at a predetermined temperature (for example, about 50°C) for a predetermined period of time during steam curing.

After the curing process is completed, in step S16, the tension of the tension member 3 is released by shortening the jack 38 as shown in FIG. 10 (E), and then the excess portion of the tension member 3 is cut off as shown in FIG. 10 (F) (tension member release and cutting process). This release of the tension member 3 applies a compressive force (prestress) to the deck slab 1.

After this cutting, or in parallel with this cutting, in step S17, the formwork 4 is dismantled and removed (removal process). In this way, the precast concrete deck 1 is produced.

In the above example, the precast concrete slab 1 to be manufactured is a prestressed concrete slab (precast PC slab), but the precast concrete slab 1 to be manufactured may also be an RC slab (precast RC slab). If the precast concrete slab 1 to be manufactured is an RC slab (precast RC slab), the matters related to the tension member 3 in the above steps S12, S13, and S16 are omitted.

In the above example, the precast concrete deck 1 is a precast PC deck manufactured using the so-called pretensioning method, but it may also be a precast PC deck manufactured using the so-called post-tensioning method.

The deck manufacturing process (step S1 in FIG. 6) may include manufacturing a wall parapet 8 (see FIGS. 1 to 3) integrally with the deck 1.
When the deck manufacturing process (step S1) is completed, the manufactured deck 1 is washed out in step S2 (deck washing process). The deck washing process can be carried out in a washing and inspection yard 14. In the deck washing process, a release agent and the like that is attached to the surface of the deck 1 and that facilitates demolding can be washed away.

Once the washing out is complete, the deck slab 1 proceeds to step S3, where quality inspections such as dimensional inspection and appearance inspection are carried out (deck slab inspection process).
For the deck 1 that has undergone quality inspections such as dimensional inspection and visual inspection in step S3, if the deck 1 is subject to a bending strength test, the process proceeds from step S4 to step S5, where a bending strength test is conducted on the deck 1 using a bending strength test device 19 (bending strength test process). The deck 1 that has completed this bending strength test is transported to and stored in the stockyard 15. Here, the process from step S3 to step S5 is a process for inspecting the quality of the deck 1 (deck quality inspection process).

On the other hand, if the deck 1 that has undergone quality inspection such as dimensional inspection and visual inspection in step S3 is not subject to a bending strength test, it is transported to the stockyard 15 and stored.
In this manner, the deck 1 is produced in each of the deck production sections 11a to 11c.

In addition, in the deck manufacturing facility 10, bending strength tests are conducted on some of the multiple decks 1 that have been manufactured. Therefore, of the deck manufacturing sections 11a to 11c, only the deck manufacturing section 11a has a bending strength test device 19. It goes without saying that the deck manufacturing sections 11b and 11c may also have this bending strength test device 19. In other words, the bending strength test device 19 may be provided in at least one of the deck manufacturing sections 11a to 11c.

FIG. 11 is a plan view of a deck fabrication facility 10' corresponding to a second example of the deck fabrication facility 100 in this embodiment. FIG. 12 and FIG. 13 are plan and side views of a deck fabrication section 11a' constituting the deck fabrication facility 10'. FIG. 14 is a view taken along the arrows B-B in FIG. 12. For convenience of explanation, the following description will be given with east-west-north-south directions defined as shown in FIG. 11 to FIG. 14, but it goes without saying that the relationship between each component of the deck fabrication facility 10' and east-west-north-south directions is not limited to that shown in the drawings. Also, in FIG. 13, the running rails 26 are omitted for the sake of simplicity.
The differences between the deck slab production facility 10 and the deck slab production facility 10' described above will be described.

In the deck construction facility 10', the extension direction (north-south direction) of the tent houses 21, 22 of each of the deck construction sections 11a'-11c' coincides with the arrangement direction (north-south direction) of the deck construction sections 11a'-11c'. Therefore, in the deck construction facility 10', the deck construction sections 11a'-11c' are arranged in series. Also, in each of the deck construction sections 11a'-11c', the rebar assembly yard 12, deck construction yard 13, washout/inspection yard 14, and stockyard 15 are arranged in a straight line in the north-south direction (i.e., arranged in series).

Each of the deck construction sections 11a'-11c' uses a bridge crane (gantry crane) as the lifting device 25. The lifting device 25 can travel along a pair of running rails 26 that extend in the north-south direction. Between the running rails 26 are located the rebar assembly yard 12, deck construction yard 13, washout and inspection yard 14, and stockyard 15. The lifting device 25 has the aforementioned roles (1)-(5) like the previously described lifting device 20.

In the example shown in FIG. 11, the running rails 26 are separated between the deck construction sections 11a' and 11b' and between the deck construction sections 11b' and 11c', but the running rails 26 may also be connected between the deck construction sections 11a' and 11b' and between the deck construction sections 11b' and 11c'. In this case, the lifting device 25 can travel between the deck construction sections 11a' to 11c'.

Comparing the deck fabrication facility 10 (slab fabrication sections 11a-11c) and the deck fabrication facility 10' (slab fabrication sections 11a'-11c'), the layout of the facilities (in other words, the relative positions (arrangements) of the rebar assembly yard 12, deck fabrication yard 13, washout/inspection yard 14, stockyard 15, generator 16, boiler 17, operation panel 18, bending strength test device 19, tent houses 21, 22, tensioning frame 30, etc.) is clearly different. Here, the facilities of the deck fabrication facilities 10, 10' (slab fabrication facility 100) include the rebar assembly yard 12, deck fabrication yard 13, washout/inspection yard 14, stockyard 15, generator 16, boiler 17, operation panel 18, bending strength test device 19, tent houses 21, 22, tensioning frame 30, etc.

Next, an example of a method for replacing a deck slab will be described with reference to FIG. 15 in addition to the above-mentioned FIGS.
Figure 15 is a diagram showing an example of a temporary location for the deck fabrication facilities 10, 10'. Figure 15(A) is a plan view showing a traffic control area 41 on an expressway 40. Figure 15(B) is a cross-sectional view taken along CC in Figure 15(A).
Here, the method for replacing a deck is included in the "bridge construction method" of the present invention.

As shown in FIG. 15, the deck replacement work area 43 of the bridge 42 is located within the traffic control area 41. Within the deck replacement work area 43 of the bridge 42, the existing deck will be removed and a new deck will be installed. Multiple decks 1 manufactured at the deck manufacturing facility 10 and/or deck manufacturing facility 10' will be used as this new deck.

In the method for replacing the deck of a bridge 42 (method for constructing a bridge 42), construction of the bridge 42 is advanced by sequentially lining up multiple decks 1 in the bridge axis direction of the bridge 42 as new decks in the area of the deck replacement work 43 where the existing deck has been removed. Here, the method for constructing the bridge 42 is a method for constructing the bridge 42 by lining up multiple decks 1 in the bridge axis direction of the bridge 42.

The deck fabrication facility 10 (parallel type) can be temporarily installed, for example, in the bridge underside site P1 in FIG. 15, in general site P2 near the expressway 40 and/or bridge 42, or in a service area or parking area P3 within the traffic control area 41.

The deck fabrication facility 10' (straight type) can be temporarily installed, for example, on the bridge underside site P1 in FIG. 15, on general site P2 near the expressway 40 and/or bridge 42, or on the road surface P4 within the traffic control area 41.

Here, the method of replacing the deck of the bridge 42 (method of constructing the bridge 42) may include temporarily setting up the deck manufacturing facility 10, 10' below the bridge 42 (e.g., the bridge underside site P1). For example, a lifting device such as a crane may be placed on the bridge 42, and the deck 1 may be lifted from the deck manufacturing facility 10, 10' to the installation location of the deck 1 on the bridge 42 using the lifting device. In this case, a deck 1 with larger dimensions than conventional ones can be manufactured.

The method for replacing the deck of the bridge 42 (the method for constructing the bridge 42) may also include temporarily setting up the deck manufacturing facility 10 in a service area or parking area P3 of the expressway 40. In this case, too, it is possible to manufacture a deck 1 with dimensions larger than those of conventional ones.

The method for replacing the deck of the bridge 42 (the method for constructing the bridge 42) may also include temporarily setting up the deck manufacturing facility 10' at a chain attachment/detachment site adjacent to the road. In this case, a deck 1 with larger dimensions than conventional ones can be manufactured. Here, the chain attachment/detachment site is a place where chains are attached to and detached from vehicle tires.

The method for replacing the deck of the bridge 42 (the method for constructing the bridge 42) may also include temporarily setting up the deck manufacturing facility 10' on a closed area of the road (for example, on the road surface P4 within the traffic control area 41 of the expressway 40). In this case, too, it is possible to manufacture a deck 1 with dimensions larger than those of conventional ones.

The method of replacing the deck of the bridge 42 (the method of constructing the bridge 42) may include temporarily setting up the deck manufacturing facility 10' on the existing deck of the bridge 42 (for example, on the deck 1 already installed on the bridge 42 as a new deck). In this regard, FIG. 16 shows the deck manufacturing facility 10' temporarily set up on the existing deck (for example, on the deck 1 already installed on the bridge 42 as a new deck). In this case, a deck 1 with a larger size than the conventional one can be manufactured. Note that the lifting device 25 shown in FIG. 16 does not have the running rail 26, and instead has wheels 27 that can roll on the existing deck. The lifting device 25 shown in FIG. 16 also has wheels 28 that can contact the wall parapet 8, and the running of the lifting device 25 can be guided by these wheels 28.

In addition, in the method of replacing the deck of the bridge 42 (the method of constructing the bridge 42), the deck manufacturing facility 10, 10' may be adjacent to the bridge 42 (for example, the deck manufacturing facility 10, 10' may be temporarily installed on the general site P2). In this case, a deck 1 with larger dimensions than the conventional one can be manufactured.

It is preferable that the route for transporting the deck from the deck manufacturing facility 10, 10' to the installation site of the deck 1 on the bridge 42 does not include a public road. Even in this case, it is possible to manufacture a deck 1 with larger dimensions than conventional ones.

In this embodiment, the deck fabrication facility 10, 10' includes equipment (tensioning frame 30) for applying tension to the tension members 3 that make up the deck 1, and this equipment (tensioning frame 30) is configured to be relocatable. The deck fabrication facility 10, 10' also includes equipment (bending strength testing device 19) for inspecting the quality of the deck 1, and this equipment (bending strength testing device 19) is configured to be relocatable. Therefore, the deck fabrication facility 10, 10' can be smoothly relocated (moved).

In this embodiment, the balustrade 8 is manufactured integrally with the slab 1 in the slab manufacturing facilities 10, 10'. This reduces the work required to form the balustrade 8 on-site.

Next, a method for relocating the deck slab production facility 100 from the source to the destination will be described with reference to FIG. 17 in addition to the above-mentioned FIGS.
FIG. 17 is a flowchart showing a method for relocating the deck manufacturing facility 100 in this embodiment.

In this relocation method, first, in step S31, a relocation destination for the deck slab fabrication facility 100 is determined.
Next, in step S32, the layout of the equipment of the deck manufacturing facility 100 at the relocation destination is determined.
Next, in step S33, the deck manufacturing facility 100 is moved from the original location to the destination location.

When the deck fabrication facility 100 is moved from the source to the destination, the layout of the equipment may be changed. For example, if the equipment layout of the deck fabrication facility 100 at the source is the equipment layout of the deck fabrication facility 10 (parallel type) described above, and the equipment layout of the deck fabrication facility 100 at the destination is the equipment layout of the deck fabrication facility 10' (series type) described above, then the equipment layout of the deck fabrication facility 100 at the source and the equipment layout of the deck fabrication facility 100 at the destination will be different.

When the deck fabrication facility 100 is moved from the source to the destination in step S33, the layout of the equipment does not need to be changed. In other words, the layout of the equipment of the deck fabrication facility 100 at the source may be the same as the layout of the equipment of the deck fabrication facility 100 at the destination.

At least one of the aforementioned source and destination locations may be located below the bridge 42 (e.g., bridge underside site P1) on which the deck 1 produced in the deck manufacturing facility 100 is to be installed. For example, a lifting device such as a crane may be placed on the bridge 42, and the deck 1 may be lifted from the deck manufacturing facility 100 to the installation location of the deck 1 on the bridge 42 using the lifting device. In this case, a deck 1 with larger dimensions than conventional ones can be manufactured.

At least one of the aforementioned source and destination locations may be adjacent to the bridge 42 on which the deck 1 produced in the deck production facility 100 will be installed (for example, the deck production facility 100 may be temporarily installed on general site P2). In this case, a deck 1 with larger dimensions than conventional ones can be produced.

At least one of the aforementioned source and destination points can be located on an existing deck of the bridge 42 on which the deck 1 produced in the deck production facility 100 will be installed (for example, on a deck 1 that has already been installed on the bridge 42 as a new deck) (see FIG. 16). In this case, too, a deck 1 with larger dimensions than conventional ones can be produced.

At least one of the source and destination of the relocation may be located in a service area or parking area P3 of the expressway 40. In this case, too, it is possible to manufacture a deck 1 with larger dimensions than conventional ones.

At least one of the aforementioned source and destination locations can be located at a chain attachment/detachment site adjacent to a road. In this case, too, it is possible to manufacture a deck 1 with larger dimensions than conventional ones.

At least one of the aforementioned source and destination locations may be located in a closed area of a road (for example, on road surface P4 within traffic control area 41 of expressway 40). In this case, too, it is possible to manufacture a deck 1 with larger dimensions than conventional ones.

Figures 18(a) and (b) show a first and second example of a deck replacement project in this embodiment. Figure 19 shows a third example of a deck replacement project in this embodiment.

In the first example of a deck replacement project shown in FIG. 18 (A), the deck replacement work area 43 of the bridge 42 is short, about 50 to 100 m. Therefore, the deck fabrication facility 100 temporarily constructed for this project will not be relocated until the project is completed. Once the project is completed, the deck fabrication facility 100 will be relocated, with the layout of the facilities of the deck fabrication facility 100 changed if necessary, depending on the shape of the land at the temporary location (relocation destination) of the deck fabrication facility 100 for the next different project.

In the second example of a deck replacement project shown in FIG. 18(A), the deck replacement work area 43 of the bridge 42 is long, at 300 to 400 m or more. Therefore, in this project, the deck fabrication facility 100 is relocated according to the progress of the deck replacement work on the bridge 42 (in other words, according to the progress of the construction of the bridge 42). For example, as shown in FIG. 18(A), as the construction of the bridge 42 progresses, the deck fabrication facility 100 is relocated from the bridge underside site P1-1, which is the source of the relocation, to the bridge underside site P1-2, which is the destination of the relocation. In this case, the layout of the equipment of the deck fabrication facility 100 is changed if necessary depending on the site shape of the bridge underside site P1-2 (destination), and the deck fabrication facility 100 is relocated.

In the third example of a deck replacement project shown in FIG. 19, deck replacement is performed on multiple bridges 42-1 to 42-4 (four in FIG. 19) between interchanges M1 and M2 on a highway 40 at the same time. Here, the distance between interchanges M1 and M2 is very long, about 20 to 30 km. In this project, the deck manufacturing facility 100 may be relocated according to the schedule for replacing the decks of bridges 42-1 to 42-4. Alternatively, the deck manufacturing facility 100 may be temporarily installed separately for each of bridges 42-1 to 42-4. The deck manufacturing facility 100 can efficiently manufacture decks 1 with the flexibility of being easily relocated, even in such a complex and large-scale project.

In the above-mentioned first to third examples of deck replacement projects, the following cases 1 to 3 are possible.
[Case 1]
When the deck manufacturing facility 100 is relocated, the size of the equipment (e.g., the tension frame 30, etc.) may increase or decrease.
[Case 2]
Since construction work may not be continuous, in such cases the equipment to be relocated is temporarily placed in another location, and then the equipment is transported from the other location to the new location.
[Case 3]
For each temporary location of the deck fabrication facility 100, some of the equipment for the deck fabrication facility 100 (e.g., H-shaped steel, tents, etc.) will be procured from a leasing company, and this part may not be transported from the source to the destination.

It goes without saying that the illustrated embodiments are merely illustrative of the present invention, and that the present invention encompasses various modifications and variations that may be made by those skilled in the art within the scope of the claims, in addition to those directly shown in the described embodiments.
In addition, the claims at the time of filing of Patent Application No. 2019-158646 were as follows.
[Claim 1]
A method for relocating a floor slab production facility for producing precast concrete floor slabs from a relocation source to a relocation destination, comprising:
A method for relocating a deck fabrication facility, in which the layout of the equipment of the deck fabrication facility at the source of relocation is different from the layout of the equipment of the deck fabrication facility at the destination of relocation.
[Claim 2]
2. The method for relocating a deck slab fabrication facility according to claim 1, wherein the deck slab fabrication facility includes equipment for applying tension to tension members constituting the deck, the equipment being configured to be relocatable.
[Claim 3]
3. The method for relocating a deck slab manufacturing facility according to claim 1, wherein the deck slab manufacturing facility includes equipment for inspecting the quality of the deck slab, and the equipment is configured to be relocatable.
[Claim 4]
The method for relocating a deck slab manufacturing facility according to any one of claims 1 to 3, wherein a wall parapet is manufactured integrally with the deck slab at the deck slab manufacturing facility.
[Claim 5]
A method for relocating a deck fabrication facility described in any one of claims 1 to 4, wherein at least one of the source and destination is adjacent to a bridge on which the deck fabricated at the deck fabrication facility will be installed.
[Claim 6]
A method for relocating a deck fabrication facility described in any one of claims 1 to 4, wherein at least one of the source and destination is located on an existing deck of a bridge on which the deck fabricated at the deck fabrication facility will be installed.
[Claim 7]
A method for relocating a deck fabrication facility described in any one of claims 1 to 4, wherein at least one of the source and destination is located below a bridge on which the deck fabricated at the deck fabrication facility will be installed.
[Claim 8]
A method for relocating a deck manufacturing facility according to any one of claims 1 to 4, wherein at least one of the source and destination is located in a service area or a parking area of a highway.
[Claim 9]
A method for relocating a deck manufacturing facility as described in any one of claims 1 to 4, wherein at least one of the source and destination is located at a chain attachment/detachment site adjacent to a road.
[Claim 10]
A method for relocating a deck manufacturing facility according to any one of claims 1 to 4, wherein at least one of the source and destination is located on a closed area of a road.
[Claim 11]
A method for relocating a floor slab production facility for producing precast concrete floor slabs from a relocation source to a relocation destination, comprising:
A method for relocating a deck fabrication facility, in which the layout of the equipment of the deck fabrication facility at the source of relocation is the same as the layout of the equipment of the deck fabrication facility at the destination of relocation.

1... Deck, 2... Steel bar, 3... Tendon, 4... Formwork, 5, 6... Fixing device, 8... Wall parapet, 10, 10'... Deck slab production facility, 11, 11a to 11c, 11a' to 11c'... Deck slab production section, 12... Steel bar assembly yard, 13... Deck slab production yard, 14... Washing and inspection yard, 15... Stock yard, 16... Generator, 17... Boiler, 18... Control panel, 19... Bending strength test device, 20... Lifting device, 21, 22... Tent house, 25... Lifting device, 26... Running rail, 27, 28... Wheels, 3 0... tension frame, 31... support, 32... upper beam, 33... lower beam, 34... vertical beam, 35... horizontal beam, 36... fixed beam, 37a, 37b... support frame, 38... jack, 39... fixed beam, 40... expressway, 41... traffic control area, 42, 42-1 to 42-4... bridge, 43... deck replacement work area, 100... deck manufacturing facility, C... concrete, M1, M2... interchange, P1, P1-1, P1-2... bridge underside land, P2... general land, P3... service area or parking area, P4... road surface

Claims (2)

A method for relocating a floor slab production facility for producing precast concrete floor slabs from a relocation source to a relocation destination, comprising:
The layout of the equipment of the deck slab production facility at the relocation source is different from the layout of the equipment of the deck slab production facility at the relocation destination,
The deck fabrication facility includes a tension frame for applying tension to the tension members constituting the deck,
A method for relocating a deck slab manufacturing facility, wherein the tensioning frame has a pair of rectangular frame structures which function as reaction frames for applying tension to the tensioning members, and each of the pair of rectangular frame structures includes two supports, one upper beam, and one lower beam. A method for relocating a floor slab production facility for producing precast concrete floor slabs from a relocation source to a relocation destination, comprising:
The layout of the equipment of the deck slab fabrication facility at the relocation source is the same as the layout of the equipment of the deck slab fabrication facility at the relocation destination,
The deck fabrication facility includes a tension frame for applying tension to the tension members constituting the deck,
A method for relocating a deck slab manufacturing facility, wherein the tensioning frame has a pair of rectangular frame structures which function as reaction frames for applying tension to the tensioning members, and each of the pair of rectangular frame structures includes two supports, one upper beam, and one lower beam.