JP2019073948A - Floor slab reconstruction method - Google Patents

Abstract

To provide a floor slab reconstruction method which makes it possible to carry out the efficient reconstruction of a floor slab.SOLUTION: A floor slab reconstruction method includes setting a plurality of construction areas Ato Aby dividing a bridge 1 as an example of a structure into a plurality of construction area Ato Ain its axial direction. Each of the construction areas Ato Ahas a plurality of stages of work processes (S1(S11 to S13), S2(S21 to S23), and S3(S31, S32)) from removal of an existing floor slab 5 to installation of a new floor slab 7. The floor slab reconstruction method concerned executes different work processes at the same time in the progress direction of the floor slab reconstruction construction along the axial direction of the bridge 1 both in a construction area on a front side in the progress direction of the floor slab reconstruction construction (e.g., a construction area A) and in a construction area rearward in the progress direction of the floor slab reconstruction construction from the aforesaid construction area (e.g., a construction area A).SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method of rebuilding a floor slab constituting a structure such as a bridge (removing an existing floor slab and installing a new floor slab to replace it).

  The bridge is disposed, for example, over a plurality of bridge piers, a plurality of bridge girder (H-shaped steel) each extending in the axial direction across the plurality of bridge piers, and a plurality of bridge girders. And a floor plate. The floor slab is made of, for example, reinforced concrete. Such floor slabs may be required to be rebuilt (removal of existing floor slabs and installation of new floor slabs) due to deterioration of concrete due to years of use and corrosion of internal rebars.

  As an apparatus used for rebuilding a floor slab, for example, a floor slab setting machine described in Patent Document 1 is known. This is provided so as to be movable in the longitudinal and lateral directions on the lower surface side of the rail-free and self-propelled portal structure connecting the portal frame front and back in the bridge axial direction and the ceiling part of the portal structure. And a lifting device (for example, a chain block). Here, the new floor is made of precast concrete.

The construction work of a new floor slab using such a construction machine is
(1) Take-in of a new floor slab at the rear of the construction machine, that is, a new floor slab with the long side of the new floor slab directed in the bridge axial direction by the lifting device positioned at the rear of the construction machine (2) Transfer of the new floor slab to the installation position by moving the lifting device to the front side (3) Changing the direction of the new floor slab so that the long side of the new floor slab is directed perpendicular to the bridge axis (90 ° rotation)
(4) And it is performed at the process of installation in a predetermined position.
In addition, the removal work of the existing floor slab is carried out in the reverse process almost in turn.

Patent No. 3901657 gazette

  However, in the above-mentioned method of rebuilding a floor slab using the above-mentioned construction machine, the above-mentioned construction machine moves in the axial direction of the bridge after removing the existing floor slab to installing a new floor slab at a construction site. From the removal of the existing floor version to the installation of a new floor version at the construction site. Therefore, it is not possible to start reconstruction of the floor slab at the next construction site until reconstruction of the floor slab at one construction site is completed, and as a result, reconstruction of the floor slab over the entire length of the bridge is required. There was a problem that it took time to do.

  An object of the present invention is to provide a method of rebuilding a floor slab that can efficiently rebuild a floor slab in a structure such as a bridge.

  Therefore, the method of rebuilding a floor plate according to the present invention is a method of rebuilding a floor plate in a structure. The floor slab rebuilding method according to the present invention includes setting a plurality of construction areas by dividing the structure into a plurality of construction areas in the axial direction of the structure. Each construction area has multiple stages of work processes from removal of the existing floor slab to arrangement of the new floor slab. In the method of rebuilding a floor slab according to the present invention, in the direction of progress of rebuilding the floor slab along the axial direction of the structure, the area of construction on the front side of the direction of rebuilding floor slab rebuilding progress Different work steps are carried out in parallel in the direction of the rear construction area.

  According to the present invention, different work processes are carried out in parallel in the construction area on the front side of the floor slab replacement construction direction and the construction area on the rear side of the floor slab reconstruction construction direction from the construction area. As a result, the construction can be carried out in parallel (that is, simultaneously) in a plurality of construction areas where the progress of the floor slab reconstruction work is different, so the reconstruction of the floor slab is efficiently performed (in other words, in a short period of time) )It can be carried out.

Side view of an example of an existing bridge Side view showing the installation state of the deck reconstruction method in the first embodiment of the present invention A flow chart showing a main routine of the floor plate rebuilding method in the first embodiment The flowchart which shows the subroutine of the floor edition rebuilding method in the aforementioned 1st execution form Flow chart showing the method of removing the existing floor slab in the first embodiment Flowchart showing arrangement preparation method of new floor in the first embodiment A flowchart showing a method of arranging a new floor in the first embodiment The figure which shows the cutting method of the existing floor slab in said 1st Embodiment. The figure which shows the cutting method of the existing floor slab in said 1st Embodiment. The figure which shows the border cutting method of the existing floor slab in said 1st Embodiment. The figure which shows the border cutting method of the existing floor slab in said 1st Embodiment. The figure which shows the arrangement preparation method of the new installation floor slab in the said 1st Embodiment. The figure which shows the arrangement preparation method of the new installation floor slab in the said 1st Embodiment. The figure which shows the arrangement preparation method of the new installation floor slab in the said 1st Embodiment. A diagram showing a method of arranging a new floor in the first embodiment A diagram showing a method of arranging a new floor in the first embodiment The figure which shows the installation method of the stud dowel in the said 1st Embodiment. The figure which shows the relationship between the time in the said 1st Embodiment, and the work process of each construction area | region The figure which shows the relationship between the time in the said 1st Embodiment, and the work process of each construction area | region Diagram showing the relationship between the time in an example of the conventional method of rebuilding a floor slab and the work process of each construction area The figure which shows the relationship between the time in 2nd Embodiment of this invention, and the operation process of each construction area | region The figure which shows the relationship between the time in the said 2nd Embodiment, and the work process of each construction area | region The flowchart which shows the arrangement method of the new floor in 3rd execution form of this invention The flowchart which shows the arrangement preparation method of the new installation floor slab in 4th execution form of this invention The flowchart which shows the arrangement method of the new installation floor slab in 5th execution form of this invention The flowchart which shows the arrangement preparation method of the new installation floor slab in 6th execution form of this invention

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same or corresponding parts are denoted by the same reference numerals.

  FIG. 1 is a side view of an example of an existing bridge to which the floor slab rebuilding method according to the present invention can be applied. FIG. 2: is a side view which shows the construction state of the floor slab change method in 1st Embodiment of this invention. In the present embodiment, the front and back are defined as shown in FIGS. 1 and 2 with the direction of progress of floor slab reconstruction work in a bridge as the direction of forward movement, which will be described below. Here, the direction in which the floor slab reconstruction work proceeds is along the bridge axis direction of the bridge. Further, in the present embodiment, the direction perpendicular to the bridge axis of the bridge will be described as the lateral direction (lateral direction) (see FIGS. 10A to 12).

  In the present embodiment, a bridge is described as an example of the “structure” (civil engineering structure) of the present invention, but the “structure” of the present invention is not limited to the bridge. Moreover, the above-mentioned bridge shaft direction may correspond to the “axial direction of the structure” and the “axial direction of the bridge” in the present invention.

  The bridge 1 which is an example of the "structure" of the present invention includes a pair of front and rear abutments 2a and 2b, a plurality of bridge piers 3 disposed at intervals between the abutments 2a and 2b, and abutments 2a and 2b, respectively. And a plurality of bridge girder (H-shaped steel) 4 extending in the bridge axial direction straddling on a plurality of bridge piers 3 and an existing floor slab 5 made of concrete disposed straddling a plurality of bridge girder 4 And is comprised. A bearing (not shown) is interposed between the abutments 2a and 2b and the plurality of bridge piers 3 and the plurality of bridge beams 4. Here, in the present embodiment, the existing floor slab 5 will be described below as being made of reinforced concrete (it is an RC floor slab), but in addition, the existing floor slab 5 may be made of prestressed concrete (PC floor It may be a version). The bridge girder 4 also has a web 4 w, an upper flange 4 f, and a lower flange (not shown), as shown in FIGS. 10A to 10C described later.

  In the present embodiment, the total length (bridge length) Lt of the bridge 1 will be described as 300 m, but the total length Lt of the bridge 1 is not limited to 300 m. Moreover, although this embodiment demonstrates as what is called a whole section floor slab reconstruction construction which does not divide the existing floor slab 5 in the bridge shaft right angle direction of the bridge 1 below, a construction form is not restricted to this, for example, a bridge The existing floor slab 5 may be divided into two in a direction perpendicular to the bridge axis 1 so-called a half-section floor slab replacement construction.

  In addition to FIG.1 and FIG.2, the floor-plate rebuilding method in this embodiment is demonstrated using FIG.3 and FIG.4. FIG. 3 is a flow chart showing a main routine of the floor plate rebuilding method in the present embodiment. FIG. 4 is a flow chart showing a subroutine of the floor plate rebuilding method according to the present embodiment.

  The floor slab rebuilding construction of the bridge 1 (removal of the existing floor slab 5 and installation of the new floor slab 7 instead of this) generally follows the main routine shown in FIG.

First, in step S101, (in this embodiment n) of a plurality of bridge 1 to Hashijiku direction by partitioning the construction area _A 1 to A _n of the sets a plurality of construction areas _A 1 to A _n. In the present embodiment, the length of each of the bridge axis direction construction areas A ₁ to A _n are, will be described below as a 6m respectively, of each of the bridge axis direction construction areas A ₁ to A _n length Is not limited to 6m. For example, in the case where the total length Lt of the bridge 1 is 300 m and the length in the direction of the bridge axis of each of the construction areas A _{1 to} A _n is 6 m, n = 300/6 = 50.

Next, in step S102, performed by each of the construction area _A 1 to A _n, and removal of the existing deck 5, the arrangement of the new floor plate 7 an alternative thereto. In the present embodiment, for example, as shown in FIG. 2, the floor plate hung replacement work can be performed in parallel by a plurality of construction areas A _k ~A _k-6. In the present embodiment, in the floor slab replacement construction progressing direction, the construction area on the front side (for example, construction area _Ak-4 ) and the construction area behind this construction area (for example construction area _Ak-6 ) Thus, different operation steps can be performed in parallel.

When removal of the existing floor slab 5 and placement of the new floor slab 7 replacing it are performed in all of the construction areas A _{1 to} A _n (that is, placement of the new floor slab 7 is completed over the entire length Lt of the bridge 1) In step S103, the new installation floor 7 and the bridge girder 4 are fixed and integrated, and the new installation floor 7 adjacent to each other in the bridge axis direction is fixed and integrated.
In this way, the floor plate reconstruction work of the bridge 1 is performed.

Regarding step S102 described above, each of the construction areas A _{1 to} A _n has a plurality of stages of work processes from removal of the existing floor slab 5 to arrangement of the new floor slab 7. The multistage working process is shown in FIG.
As shown in FIG. 4, first, at step S1, the existing floor slab 5 is removed as a front stage (first stage). Here, step S1 corresponds to the "first operation process" of the present invention.

  Next, in step S2, as the middle stage (the second stage), the preparatory work (placement preparation work for the newly installed floor version 7) for placing the newly installed floor version 7 in the construction area from which the existing floor version 5 has been removed Do. Here, step S2 corresponds to the "second operation process" of the present invention.

  Next, in step S3, as a subsequent stage (third stage), the new floor slab 7 is placed in the construction area where the placement preparation work of the new floor slab 7 has been performed. Here, step S3 corresponds to the "third operation process" of the present invention.

Here, the removal work of the existing floor slab 5 implemented in step S1 will be described using FIGS. 5 and 8A to 9B in addition to FIGS. 1 to 4 described above.
FIG. 5 is a flowchart showing a method of removing the existing floor slab 5 in the present embodiment. Drawing 8A and Drawing 8B are figures showing the cutting method of existing floor slab 5 in this embodiment. FIG. 9A and FIG. 9B are figures which show the border cutting method of the existing floor slab 5 in this embodiment.

  As shown in FIG. 5, first, in step S11, the existing floor plate 5 is cut. In this step S11, as shown in FIG. 8A and FIG. 8B, a cutting line 5b is set at a position ahead by a predetermined length La from the rear end of the existing floor slab 5, and along the cutting line 5b The existing floor slab 5 is cut using a concrete cutting device such as a wire saw to form the floor slab piece 5a. In the present embodiment, the above-mentioned predetermined length La is 2 m, but the above-mentioned predetermined length La is not limited to 2 m.

  Next, in step S12, the edge cutting operation of the floor slab piece 5a of the existing floor slab 5 is performed. In this step S12, first, as shown in FIG. 9A, a plurality of jacks 50a and 50b in a shortened state are installed on the front and the rear of the floor slab piece 5a, respectively. Here, the jacks 50a and 50b are extendable in the vertical direction, and are, for example, hydraulic jacks.

  The lower end of the front jack 50 a abuts on the upper surface of the existing floor plate 5. The lower end of the rear jack 50b abuts on the upper surface 4a of the bridge girder 4 (specifically, the upper surface 4a of the upper flange 4f of the bridge girder 4 shown in FIGS. 10A to 10C).

  Moreover, as shown to FIG. 9A, the beam member 51 is arrange | positioned so that it straddles on jack 50a, 50b. The beam member 51 is fixed to the upper end portions of the jacks 50a and 50b. The beam member 51 has a bracket (not shown), and a vertically extending PC steel rod 52 is disposed so as to penetrate the bracket and the floor slab 5a. The PC steel rods 52 are arranged to pass the bridge girder 4. Fixing members 53a and 53b for fixing the beam member 51 (the aforementioned bracket) and the floor slab piece 5a and the PC steel rod 52 are attached to the upper end portion and the lower end portion of the PC steel rod 52, respectively.

  Next, as shown in FIG. 9B, the floor slab piece 5a is pulled up via the beam member 51 (the aforementioned bracket) and the PC steel rod 52 by operating the jacks 50a and 50b to extend. Thus, when the floor slab piece 5a is separated from the bridge girder 4, the jacks 50a and 50b are shortened, and the PC steel rod 52, the beam member 51, and the jacks 50a and 50b are removed.

Next, in step S13 of FIG. 5, the floor slab 5a which has been cut from the bridge girder 4 is lifted by the crane device 20 shown in FIG. 2 and the floor of the floor slab 5a is oriented in the bridge axial direction. The direction of the printing piece 5a is changed (ie, rotated by 90 °), and the floor mounting piece 5a is placed by the crane device 20 on the bed of a transport vehicle (not shown). The transport vehicle is a floor plate pieces 5a, may be unloaded from the construction area A ₁ to A _n in construction ahead of the vehicle re hung slab. In addition, this transport vehicle can travel on the existing floor slab 5.

  The crane device 20 includes a pair of left and right lower frames 21 extending in the front and rear direction, a gate-shaped frame 22 whose lower ends are connected to the pair of left and right lower frames 21, and an upper frame 23 provided on the gate-shaped frame 22. And a lifting device 24 movable in the front, rear, left, and right directions with respect to the upper frame 23. The pair of left and right lower frames 21 is provided with wheels capable of rolling on the existing floor slab 5. In the portal frame 22 and between the pair of left and right lower frames 21, the above-described carrier of the transport vehicle can be disposed.

In this embodiment, each one construction region (i.e. in each of the construction area A ₁ to A _n), by three times the steps S11~S13 described above, the length of the bridge axis direction of one construction region We carry out removal work of the existing floor version 5 for 6m which is the same.
As described above, at step S1 in FIG. 4, the work of removing the existing floor plate 5 is performed.

Next, the placement preparation work of the new installation floor plate 7 performed in step S2 of FIG. 4 will be described using FIGS. 6 and 10A to 10C in addition to the above-described FIGS. 1 to 4.
FIG. 6 is a flow chart showing a method of preparing for placement of the new installation floor plate 7 in the present embodiment. FIG. 10A to FIG. 10C are diagrams showing a method of preparing the arrangement of the newly installed floor slab 7 in the present embodiment. Here, FIGS. 10A to 10C correspond to the I-I cross section of FIG. 11A described later.

  As shown in FIG. 6, first, in step S21, the upper surface 4a of the bridge girder 4 with the existing floor slab 5 (floor piece 5a) removed and exposed to the outside (more specifically, on the bridge girder 4 shown in FIG. The squeezing operation of the upper surface 4a) of the flange 4f is performed. Here, the kerening work may include removing concrete pieces and the like remaining on the upper surface 4 a of the bridge girder 4.

  Next, in step S22, flange seals 60 made of rubber, for example, are installed on the left and right sides of the upper flange 4f of the bridge girder 4 on which the squeezing operation is performed (see FIG. 10B). The flange seal 60 is a plate extending in the bridge axial direction. The flange seal 60 is inserted into the space 9 (see FIG. 11B) between the new floor plate 7 and the bridge girder 4 when the new floor plate 7 and the bridge girder 4 are fixed and integrated in step S103 described above. It is for preventing the mortar provided from leaking out of the space 9.

  Next, in step S23, a plurality of height adjustment members 70 for adjusting the arrangement height of the newly installed floor slab 7 are installed on the upper surface 4a of the upper flange 4f of the bridge girder 4 (see FIG. 10C). It is preferable that the height adjustment member 70 be stretchable in the vertical direction. The height adjustment member 70 may be, for example, a manual jack that can extend and contract in the vertical direction. Alternatively, the height adjustment member 70 may be configured by a member (spacer) having rigidity that can not be deformed after its own height is determined. The plurality of height adjustment members 70 are arranged in the bridge axial direction at intervals in the bridge axial direction.

  As for the height adjusting member 70, when the newly installed floor slab 7 is disposed on the bridge girder 4 in step S3 described above and step S31 described later, the planned height of the newly installed floor slab 7 is obtained. Prior to the placement of the new floor slab 7 on the bridge girder 4, height adjustment of the height adjustment member 70 itself may be performed. The height adjustment of the height adjusting member 70 itself may be performed before installing on the upper surface 4a of the upper flange 4f of the bridge girder 4 in step S23, or after installing on the upper surface 4a of the upper flange 4f of the bridge girder 4 You may go.

In the present embodiment, the height adjustment material 70 is installed after the installation of the flange seal 60. Alternatively, the height adjustment material 70 may be installed prior to the installation of the flange seal 60. That is, step S22 and step S23 may be interchanged.
As described above, in step S2 of FIG. 4, preparation work for placing the newly installed floor plate 7 is performed.

Next, the placement work of the new installation floor plate 7 performed in step S3 of FIG. 4 will be described using FIGS. 7, 11A, 11B, and 12 in addition to the above-described FIGS. 1 to 4.
FIG. 7 is a flowchart showing a method of arranging the new installation floor plate 7 in the present embodiment. 11A and 11B are diagrams showing a method of arranging the new installation floor plate 7 in the present embodiment. Here, FIG. 11B corresponds to the I-I cross section of FIG. 11A. FIG. 12 is a view showing a method of installing the stud dowel 80. As shown in FIG.

  As shown in FIG. 7, first, in step S31, the newly installed floor slab 7 is placed on a plurality of height adjustment members 70 installed on the upper surface 4a of the upper flange 4f of the bridge girder 4 (see FIGS. 11A and 11B). ). Thus, a space 9 surrounded by the upper surface 4 a of the upper flange 4 f of the bridge girder 4, the lower surface 7 b of the new floor slab 7, and the flange seal 60 is formed.

The new floor version 7 is made of precast concrete (ie, it is a PCa floor version). The newly installed floor slab 7 has a substantially rectangular shape, with the bridge axis direction as the short side and the bridge axis perpendicular direction as the long side. In the present embodiment, the length in the bridge axis direction of the newly installed floor version 7 is 2 m, but the length in the bridge axis direction of the newly installed floor version 7 is not limited to 2 m.
A plurality of through holes 7 a are formed in the new installation floor plate 7 so as to be opposed to the upper surface 4 a of the upper flange 4 f of the bridge girder 4.

  The crane apparatus 30 shown in FIG. 2 is used for the arrangement | positioning operation | work (mounting operation | work) of the newly installed floor slab 7 in step S31. The crane device 30 includes a pair of left and right lower frames 31 extending in the front and rear direction, a gate-shaped frame 32 whose lower ends are connected to the pair of left and right lower frames 31, and an upper frame 33 provided on the top of the gate-shaped frame 32; And a lifting device 34 movable in the front, rear, left, and right directions with respect to the upper frame 33. The left and right lower frames 31 are provided with wheels capable of rolling on the new floor slab 7 placed on the bridge girder 4. The transport carriage 40 can travel in the portal frame 32 and between the pair of left and right lower frames 31.

  The new floor slab 7 scheduled to be lifted by the crane device 30 is transported by the transport carriage 40 from the ground adjacent to the abutment 2 b (see FIG. 1) to the crane device 30. The running stability of the transport carriage 40 can be improved by laying a plate-like member such as an iron plate so as to cover from above the gap between the newly installed floor slabs 7 mounted on the bridge girder 4 and adjacent to each other. Good. The transport carriage 40 may be self-propelled. The transport carriage 40 preferably includes a wheel on which a rubber tire is used.

On the ground adjacent to the abutment 2b, the new floor slab 7 scheduled to be transported by the transport carriage 40 to the crane device 30 is unloaded from the transport vehicle (not shown) to the transport carriage 40 whose weight is lighter than that transport vehicle. For this unloading operation, a crane device having the same configuration as the above-described crane devices 20 and 30 may be used.
Accordingly, in the present embodiment, a new deck 7, carries the slab hung replacement construction traveling direction rearward construction area A ₁ to A _n.

  In the present embodiment, after the new floor slab 7 is lifted by the crane device 30 from above the transfer carriage 40, the long edge of the new floor slab 7 is directed by the crane device 30 in the direction perpendicular to the bridge axis. Change the orientation (ie rotate 90 °).

In this embodiment, each one construction region (i.e. in each of the construction area A ₁ to A _n), by three times the step S31 described above, the bridge axis direction of one construction region length fraction Perform placement work of a new floor 7 for a certain 6m (ie 3 pieces).

Next, in step S32 of FIG. 7, as shown in FIG. 12, a plurality of stud dowels 80 are welded to the upper surface 4a of the upper flange 4f of the bridge girder 4 so as to be positioned within the through holes 7a of the new floor slab 7. Fix it. When the transport carriage 40 passes in the middle of the installation work of the stud dowel 80 in step S32, the installation work of the stud dowel 80 is interrupted when the transport carriage 40 passes.
As described above, in step S3 of FIG. 4, the placement work of the newly installed floor plate 7 is performed.

In a construction state at a certain time shown in FIG. 2, the crane device 20 is located in the construction area _{Ak + 1} . In construction area _{A k} located behind the construction area _{A k + 1,} is performed tasks listed in step S1 described above (step S11 to S13). In construction area A _k-1 located behind the construction area A _k, which is implemented work shown in step S21 described above. In the construction area _Ak-2 located behind the construction area _Ak-1 , the work shown in step S22 described above is performed. In the construction area _Ak-3 located behind the construction area _Ak-2 , the work shown in step S23 described above is performed. In construction area A _k-4 located behind the construction area A _k-3, is performed work shown in step S31 described above. The crane apparatus 30 is located in the construction area _Ak-5 located behind the construction area _Ak-4 . In the construction area _Ak-6 located behind the construction area _Ak-5 , the work shown in step S32 described above is performed. In addition, the code | symbol "(alpha)" shown in FIG. 2 shows having stopped operation | work in the middle of above-mentioned step S1-S3 (step S11-S32).

In this embodiment, a construction area (for example, construction area A _k shown in FIG. 2) from the construction area (for example, construction area Ak shown in FIG. 2) in which the operation of step S1 is performed _A temporary tent 10 is provided so as to cover up to _k-6 ). Therefore, the kelen work in step S21 and the welding work in step S32 are performed in the temporary tent 10. In addition, the construction area | region covered by the temporary installation tent 10 is not restricted to what was shown in FIG.

In this manner, in the present embodiment, different work processes are performed in parallel (that is, simultaneously) in the construction area on the front side and the construction area behind the construction area in the direction of progress of floor slab replacement construction It is possible.
Further, in the present embodiment, in the direction of progress of floor slab replacement construction, as it goes from the front construction area to the rear construction area (for example, from the construction area _Ak to the construction area _Ak-6 shown in FIG. ), It is possible to perform a plurality of stages of work processes (steps S1 to S32) in parallel (that is, simultaneously) so as to be a work process of the latter stage (that is, approach step S32).

  In the present embodiment, as shown in FIG. 2, the crane device 20 is positioned in front of the crane device 30 in the direction of progress of floor slab replacement construction.

  In the present embodiment, the temporary tent 10 and the crane devices 20 and 30 move forward, following the progress of the floor plate rebuilding construction. Therefore, a floor-plate rebuilding system capable of carrying out multiple stages of work processes (steps S1 to S32) in parallel (that is, simultaneously) also advances. Here, the floor plate rebuilding system includes a temporary tent 10 and crane devices 20 and 30.

Figure 13 is a diagram showing the relationship between each of the working processes of the time t = T 1 -T 10 in this embodiment construction area _A 1 to A _9. Figure 14 is a diagram showing the relationship between each of the working processes of the time t = t1~t15 in this embodiment construction area _A 1 to A _8.

  Note that the symbol “α” shown in FIGS. 13 and 14 indicates that the work is paused in the middle of steps S1 to S3 (steps S11 to S32) described above, as in FIG. 2 described above.

Further, the time between time t1 and time t2, the time between time t2 and time t3, ..., the time between time t13 and time t14, and the time between time t14 and time t14 are the same time (in the present embodiment, respectively). 1.2 hours, but not limited to this). Further, for one construction region (i.e. each of the construction area _A 1 to A _n), step S1, S21, S22, S23, S31, the working process time S32 is the same. When setting the work process time, it can be considered which work process is a critical path among steps S1, S21, S22, S23, S31, and S32.

As shown in FIGS. 13 and 14, in this embodiment, between the time T1 to T13, and removal of the deck hung replacement (existing deck 5 in the construction area A ₁ to A _6, new floor in place to Arrangement of version 7 is completed.

In this respect, FIG. 15 shows the relationship between time t1 to t13 and each operation process of the construction areas A ₁ and A ₂ in an example of the conventional floor slab rebuilding method. Figure 15 is a removal of construction area A ₁ in the existing slab 5, after the placement of the new floor plate 7 an alternative thereto, the removal of existing deck 5 in the construction area A _2, new deck alternative thereto The arrangement of 7 indicates that it takes time to work at times t1 to t13.

  Therefore, as is apparent from the illustrations in FIGS. 13 to 15, when the floor plate reversion method of the present embodiment is used, the floor plate reversion construction can be advanced more quickly than in the conventional floor plate reversion method. Can.

  At step S103 in FIG. 3 described above, the mortar and stud dovetail 80 are injected and poured into the space 9 (see FIG. 11B) from the through holes 7a of the new floor slab 7 disposed on the bridge girder 4. The new floor plate 7 and the bridge girder 4 are fixed and integrated by (see FIG. 12). Further, in step S103 of FIG. 3 described above, the reinforced concrete construction is carried out in the space between the new floor slabs 7 adjacent to each other in the bridge axis direction (not shown), so that these new floor slabs 7 Is fixed and integrated.

According to the present embodiment, the floor slab rebuilding method divides a structure (bridge 1) into a plurality of construction areas A _{1 to} A _n in the axial direction of the structure (bridge 1) to form a plurality of construction areas It includes setting the a ₁ to a _n. Construction regions _A 1 to A _n are each has a work process of a plurality of stages leading to the arrangement of the new deck 7 from removal of the existing slab 5 (step S1~S3 (S11~S32)). In the floor plan reconstruction construction progress direction along the axial direction (bridge axis direction) of the structure (bridge 1), the construction zone on the front side of the floor slab reconstruction work progress direction and the floor slab reconstruction construction direction backward from this construction area Work steps different from each other are performed in parallel (see FIGS. 2, 13 and 14). In this manner, the construction can be carried out in parallel (that is, simultaneously) in a plurality of construction areas where the progress of the floor slab reconstruction work is different, so that the reconstruction from the existing floor slab 5 to the new floor slab 7 is efficient. It can be done well (in other words, in a short period of time) (see FIGS. 13-15).

Further, according to the present embodiment, the work process in the latter stage is performed from the construction area on the front side of the floor slab replacement construction direction toward the construction area on the rear side of the floor slab replacement construction direction (for example, as shown in FIG. 2) as such, as directed from the construction area _{a k} in the construction area _{a k-6,} so as to approach the step S32), and performed in parallel working processes of a plurality of stages (see Fig. 2, 13 and 14). Thereby, since it can be made to advance while continuing each work process along the floor slab rebuilding construction advancing direction, generation | occurrence | production of the idle time (work waiting time) of each work process can be suppressed, and, in addition, the floor slab construction Replacement construction can be performed efficiently.

According to the present embodiment, dismantled unloaded existing deck 5 (slab pieces 5a) from construction areas A ₁ to A _n in the construction ahead of the vehicle replacement bridged deck, applying a new floor plate 7 area A _{From 1 to} A _n , carry over from the back of the floor plate reconstruction work progress direction. Thereby, it can suppress that the carrying out operation of the existing floor slab 5 (floor piece 5a) and the carrying in operation of the newly installed floor slab 7 are mixed.

Further, according to the present embodiment, the plurality of stages of work processes included in each of the construction areas A _{1 to} A _n are the first work process (step S1) for carrying out the work of removing the existing floor slab 5 in the construction area; The second work process (step S2) for carrying out the preparation work for placing the new floor slab 7 in the construction area from which the floor slab 5 has been removed and the new construction floor 7 placed in the construction area for which the preparation work was carried out And a third operation process (step S3). Therefore, by performing various preparations for the placement of the new installation 7 before the placement of the new installation 7, the placement of the new installation 7 can be smoothly performed.

  Further, according to the present embodiment, the second operation process (step S2) is a height adjustment for adjusting the arrangement height of the newly installed floor slab 7 disposed in the construction area in the third operation process (step S3). Providing the members 70 on the upper surface 4a of the bridge girder 4 of the bridge 1 (step S23). Thereby, in step S31 (step S3), the newly installed floor slab 7 can be easily arranged in the construction area at the planned arrangement height.

  Further, according to the present embodiment, the second operation process (step S2) includes carrying out the Kering operation on the upper surface 4a of the bridge girder 4 of the bridge 1 (step S21). This kelen work is carried out in the temporary tent 10. Therefore, since the temporary tent 10 can function as a rain protection, it is possible to carry out the kelen work even in rainy weather. In addition, since dust generated in the kelen work can stay in the temporary tent 10, scattering of the dust to the outside can be suppressed.

According to the present embodiment, among the working process of the plurality of stages each having the construction area A ₁ to A _n, the working process including welding operation (e.g., step S32), the welding operation in the tents 10 is performed Ru. Therefore, since the temporary tent 10 can function as a rain guard, the welding operation can be performed even in rainy weather.

  Further, according to the present embodiment, the newly installed floor slab 7 is made of precast concrete. Therefore, the installation work of the new floor plate 7 at the construction site of the floor plate rebuilding can be simplified.

  Further, according to the present embodiment, after the placement of the new floor slab 7 is completed over the entire length of the bridge 1, the new floor slab 7 and the bridge girder 4 of the bridge 1 are fixed and integrated, and the axial direction of the bridge 1 ( The new floor slabs 7 adjacent to each other in the bridge axis direction are fixed and integrated (step S103). Thereby, integration of the new floor slab 7 and the bridge girder 4 and integration of adjacent new floor slabs 7 can be collectively performed over the entire length of the bridge 1, so these integration work can be performed in a short time. Can be done efficiently.

  In the present embodiment, after the placement of the new floor 7 is completed over the entire length of the bridge 1, the new floor 7 and the bridge girder 4 are fixed and integrated, and the new floor 7 adjacent to each other in the bridge axis direction is integrated. In addition, after the placement of the new floor slab 7 is completed over a predetermined section including a plurality of construction areas, which is shorter than the entire length of the bridge 1 and fixed together, these are collectively integrated in the predetermined section. The new installation floor 7 and the bridge girder 4 may be fixed and integrated, and the new installation floor 7 adjacent to each other in the bridge axial direction may be fixed and integrated.

FIG. 16A and FIG. 16B are diagrams showing the relationship between time t1 to t19 and each operation process of construction areas A _{1 to} A ₂₀ in the second embodiment of the present invention.
Points different from the first embodiment described above will be described.

In the present embodiment, the length in the bridge axis direction of each of the construction regions A _{1 to} A _n is shortened as compared with the first embodiment described above. In the present embodiment, the length of each of the bridge axis direction construction areas A ₁ to A _n, although a 2m respectively, the length of the bridge axis direction of each of the construction area A ₁ to A _n are not limited to 2m . For example, when the total length Lt of the bridge 1 is 300 m and the length in the direction of the bridge axis of each of the construction areas A _{1 to} A _n is 2 m, n = 300/2 = 150.

  In the present embodiment, the time between the times t1 and t2, the time between the times t2 and t3, ..., the time between the times t17 and t18, and the time between the times t18 and t19 are the same. (It is 0.4 hours in this embodiment, but it is not limited to this).

In the present embodiment, the work process time of step S1 is 0.4 hours for one construction area (ie, each of construction areas A _{1 to} A _n ), and the work process time of step S21 is 0.8 hours (0 4 hours × 2), and the operation process time of steps S22 and S23 is 1.2 hours (0.4 hours × 3), and the operation process time of step S31 is 0.4 hours, The work process time of step S32 is 0.4 hours.

  In the present embodiment, as shown in FIGS. 16A and 16B, according to the characteristics of each work process, the optimization of the time distribution of each work process and the optimization of the work range of each work process are realized. it can. For example, dusting in the temporary tent 10 can be performed by pausing the work of step S21 at time t6 to t7 and t9 to t10 in FIG. 16A and at time t12 to t13, t15 to t16, and t18 to t19 in FIG. 16B. Can be prevented from developing chronically.

FIG. 17 is a flow chart showing a method of arranging the new installation floor plate 7 in the third embodiment of the present invention.
Points different from the first embodiment described above will be described.

In the present embodiment, step S33 is added after step S32 as a substitute for step S103. That is, in this embodiment, each one construction region (i.e. in each of the construction area A ₁ to A _n), perform installation work stud dowels 80 in step S32, followed by this, in step S33, new The floor slab 7 and the bridge girder 4 are fixed and integrated, and the new construction floor slabs 7 adjacent to each other in the bridge axial direction are fixed and integrated. The integration operations are the same as those in the first embodiment described above, and thus the description thereof is omitted.

  In the second embodiment described above, it is needless to say that step S33 may be added after step S32 as a substitute for step S103 as in the present embodiment.

FIG. 18 is a flow chart showing a method of preparing the arrangement of the newly installed floor slab 7 in the fourth embodiment of the present invention.
Points different from the first embodiment described above will be described.

  In the present embodiment, after the work of the upper surface 4a of the upper flange 4f of the bridge girder 4 is performed in step S21 described above, the process proceeds to step S24, and the survey of the shape of the upper surface 4a of the upper flange 4f of the bridge girder 4 is performed. After this surveying is completed, the process proceeds to step S22, and flange seals 60 are installed on the left and right sides of the upper flange 4f of the bridge girder 4. That is, in the present embodiment, step S24 is added between step S21 and step S22.

  It goes without saying that in the second and third embodiments described above, step S24 may be added between step S21 and step S22 as in the present embodiment.

FIG. 19 is a flowchart showing a method of arranging the new installation floor plate 7 in the fifth embodiment of the present invention.
Points different from the first embodiment described above will be described.

  In the present embodiment, after the new installation floor 7 is placed on the plurality of height adjustment members 70 installed on the upper surface 4a of the upper flange 4f of the bridge girder 4 in step S31 described above, the process proceeds to step S34. Adjust the floor plate 7 height. After the height adjustment is completed, the process proceeds to step S 32, and a plurality of stud dowels 80 are welded and fixed to the upper surface 4 a of the upper flange 4 f of the bridge girder 4 so as to be located in the through holes 7 a of the new floor slab 7. That is, in the present embodiment, step S34 is added between step S31 and step S32.

  It goes without saying that in the second to fourth embodiments described above, step S34 may be added between step S31 and step S32 as in the present embodiment.

FIG. 20 is a flow chart showing a method of preparing the arrangement of the newly installed floor slab 7 in the sixth embodiment of the present invention.
Points different from the first embodiment described above will be described.

  In the present embodiment, a plurality of inserts are embedded in the new floor version 7. Each insert has an internal thread that passes through the new floor 7 up and down. An external thread of a bolt having a head on the upper side is screwed into the internal thread. The lower end portion of the male screw portion of the bolt protrudes downward from the lower surface 7 b of the new floor slab 7 and can abut on the upper surface 4 a of the upper flange 4 f of the bridge girder 4. By changing the degree of screwing of the male screw portion of the bolt with respect to the female screw portion, the amount by which the lower end portion of the male screw portion of the bolt protrudes downward from the lower surface 7b of the newly installed floor slab 7 may change. Therefore, these inserts and bolts (hereinafter, referred to as “insert bolts”) can function as height adjusting materials for adjusting the arrangement height of the new floor plate 7.

  In the present embodiment, a plurality of height adjustment members (for example, the above-mentioned insert and bolt) for adjusting the arrangement height of the new installation floor slab 7 are provided on the new installation floor slab 7 prior to the above-mentioned step S31. There is. Therefore, since the above-mentioned height adjustment material 70 becomes unnecessary, in this embodiment, as shown in FIG. 20, above-mentioned step S23 may be omitted.

  In the second to fifth embodiments described above, as in the present embodiment, the height adjustment material (e.g., the above-mentioned insert and bolt) for adjusting the arrangement height of the newly installed floor slab 7 is the same as that described above. It is needless to say that step S23 can be omitted because the height adjustment member 70 described above becomes unnecessary if a plurality of pieces are provided on the newly installed floor plate 7 prior to step S31. In particular, in the fifth embodiment described above, as in the present embodiment, the height adjustment material (for example, the above-mentioned insert and bolt) for adjusting the arrangement height of the new installation floor slab 7 is added to the above-mentioned step S31. If a plurality of new floor slabs 7 are provided in advance and step S23 is omitted, the height adjustment material (for example, the above-mentioned insert and bolt) is used in the height adjustment of the new floor slab 7 in step S34. obtain.

  In the first embodiment described above, work teams including workers and devices are individually organized (ie, divided into divisions) so as to correspond to each of a plurality of work processes (steps S1, S21 to S23, S31, S32). These work teams are arranged in a row in the axial direction of the bridge in accordance with the order of work processes (steps S1, S21 to S23, S31, S32) (that is, a production line for floor plate replacement consisting of these work teams) Something like is formed). Then, these work teams repeat the execution of each work and the forward movement in parallel, and the floor plate replacement construction proceeds. Therefore, the floor plate reversion construction proceeds by the flow work accompanied by forward movement by these work teams. This point is the same not only in the first embodiment but also in the second to sixth embodiments. Here, a part of the floor plate reconstruction work or a construction work by utilizing ICT (information and communication technology) including AI (Artificial Intelligence) technology or the like with regard to work by each work team and cooperation among the work teams, etc. The entire automation can be realized, which in turn can significantly improve productivity. Therefore, the method of rebuilding a floor plate according to the present invention improves productivity in updating infrastructure maintenance and management by promoting i-Construction (registered trademark) by utilization of ICT etc., as well as creating an attractive work environment. It can be one of the basic technologies to contribute to the increase in the number of workers entering construction for young people, and its industrial applicability is great.

In the first to sixth embodiments described above, for example, in the case of the slightly delayed work in either the construction area A ₁ to A _n can increase the personnel workers construction area work is slightly delayed, etc. The arrangement (configuration) of the above-mentioned work team may be changed according to the progress of construction (that is, the arrangement (configuration) of the work team may be flexible).

  In the first to sixth embodiments described above, the length in the bridge axis direction of the construction area in which the work of removing the existing floor slab 5 (step S1 described above) is performed is constant (the first and third to sixth embodiments In the case of 6 m in the second embodiment and 2 m in the second embodiment, an example is shown in which floor slab replacement construction proceeds, but in addition to this, in the construction area where removal work of the existing floor slab 5 (step S1 described above) is performed The length in the bridge axis direction may change according to the time. That is, flexibility may be given to the length in the bridge axial direction of the construction area where the work of removing the existing floor slab 5 (step S1 described above) is performed. If the length in the bridge axis direction of the construction area where the work of removing the existing floor slab 5 (step S1 described above) is performed changes according to the time, the subsequent work is appropriately adjusted to follow it. obtain.

In the first to sixth embodiments described above, the length in the bridge axis direction of each of the construction regions A _{1 to} A _n is constant (6 m in the first and third to sixth embodiments, 2 m in the second embodiment) although, this addition, the length of each of the bridge axis direction construction areas a ₁ to a _n may be different from each other.

In the above-described first embodiment, in each of the construction areas A _{1 to} A _n , a work pause period (a period corresponding to the symbol “α” in FIG. 2) is provided between the above-described step S31 and step S32. However, this work suspension period is not limited to between the above-mentioned step S31 and step S32. In addition to or in place of this, between the above-described step S1 and step S21, between step S21 and step S22, between step S22 and step S23, and between step S23 and step S31. At least one of the intervals may optionally be provided with a work rest period. This point is the same not only in the first embodiment but also in the second to sixth embodiments. Here, the work suspension period can function as an adjustment fee for the work time of each work.

In the first to sixth embodiments described above, but the order of each of the working processes in the construction area A ₁ to A _n are the same, the other part of the working process of the construction area A ₁ to A _n The order may be different from the order of the work steps described in the first to sixth embodiments described above.

  In the first to sixth embodiments described above, the existing floor slab 5 may be made of precast concrete (may be a PCa floor slab). The existing floor slab 5 may be made of cast-in-place concrete. The existing floor slab 5 may be a steel floor slab, a synthetic floor slab, or the like.

  In the first to sixth embodiments described above, the new floor slab 7 may be a floor slab made of half-precast concrete or the like, in which precast concrete is used in part of the floor slab. The newly installed floor version 7 may be made of prestressed concrete (may be a PC floor version). The newly installed floor version 7 may be a steel floor version, a synthetic floor version, or the like.

  In the first to sixth embodiments described above, a bridge is described as an example of the “structure” of the present invention, but the “structure” of the present invention is not limited to the bridge. For example, the "structure" of the present invention may be a tunnel having a floor slab.

  The illustrated embodiments are merely illustrative of the present invention, and in addition to those directly shown by the described embodiments, various improvements and modifications made by those skilled in the art within the scope of the claims can be made. It is needless to say that it is included.

1 Bridge 2a, 2b Abutment 3 Pier 4 Bridge 4a Upper surface 4f Upper flange 4w Web 5 Floor plate 5a Floor plate piece 5b Cutting line 7 New floor plate 7a Through hole 7b Lower surface 9 Space 10 Temporary tent 20, 30 Crane device 21, 31 Lower frame 22, 32 portal frame 23, 33 upper frame 24, 34 lifting device 40 transport carriage 50a, 50b jack 51 beam member 52 PC steel rod 53a, 53b fixing member 60 flange seal 70 height adjusting member 80 stud dowel A _{1 to} A _{k to} A _n construction area

Claims (10)

A method of replacing floor slabs in a structure,
Setting a plurality of construction areas by dividing the structure into a plurality of construction areas in the axial direction of the structure;
Each construction area has a multi-step work process from removal of the existing floor slab to placement of the new floor slab,
In the construction direction of the floor slab rebuilding along the axial direction of the structure, work steps different from each other in the construction area on the front side of the construction direction and in the construction area on the rear side of the construction area from the construction area How to rebuild the floor version.   The floor slab rebuilding according to claim 1, wherein a plurality of stages of work processes are carried out in parallel so as to become a work process of a later stage from the construction area on the front side in the traveling direction toward the construction area on the rear side in the traveling direction. Method. Carrying out the removed existing floor slab from the construction area forward in the traveling direction,
The floor plate rebuilding method according to claim 1 or 2, wherein a new floor slab is carried into the construction area from the rear in the traveling direction. The work processes of multiple stages that each construction area has respectively
A first operation process for removing the existing floor slab in the construction area;
A second operation process for performing a preparatory work for placing a new floor slab in the construction area where the existing floor slab has been removed;
A third operation process of arranging a new floor slab in the construction area in which the preparation work has been performed;
The floor plate rebuilding method according to any one of claims 1 to 3, comprising The structure is a bridge,
The second operation process includes providing a height adjustment material for adjusting the arrangement height of the new floor slab arranged in the construction area in the third operation process on the upper surface of the bridge girder of the bridge. The floor plate rebuilding method according to claim 4. The structure is a bridge,
The method of rebuilding a floor slab according to claim 4 or 5, wherein the second operation step includes performing a kerning operation on the upper surface of the bridge girder of the bridge.   The floor plate rebuilding method according to claim 6, wherein the kelen work is performed in a temporary tent.   The floor according to any one of claims 1 to 7, wherein in the work process including the welding work among the plurality of work processes each of the construction areas has, the welding work is performed in the temporary tent How to replace the version. The structure is a bridge,
After the placement of the new floor is completed over the entire length of the bridge, the new floor and the bridge girder of the bridge are fixed and integrated, and the adjacent new floors in the axial direction of the bridge are fixed and integrated. The floor plate rebuilding method according to any one of claims 1 to 8, wherein   The method for rebuilding a floor slab according to any one of claims 1 to 9, wherein the newly installed floor slab is made of precast concrete.