Method for Reinforcing Base of PBB and Reinforced Base

Abstract

There is a need for a reinforcement method that reuses and reinforces an existing base without newly remaking the existing base. 【Solution means】A base reinforcement method for reinforcing an existing base, wherein the existing base projects vertically from the ground of the airport, and a fixing plate on which a plurality of existing anchor bolts for fixing a PBB extend in the vertical direction is fixed to the upper surface of the existing base. The base reinforcement method includes a step of drilling a plurality of holes in the fixing plate on the upper surface of the existing base, an additional anchor fixing step of fixing a plurality of additional anchor bolts to the plurality of holes, a conversion adapter fixing step of fixing a conversion adapter to the plurality of existing anchor bolts and the plurality of additional anchor bolts, and a mortar molding step of filling and molding non-shrinkage mortar on the upper part of the existing base. It is solved by the base reinforcement method of the PBB including these steps.

Description

Technical Field

[0001] The present invention relates to a method for reinforcing a base of a PBB and a reinforced base.

Background Art

[0002] In a passenger aircraft (hereinafter referred to as an airliner), passengers board the airliner (not shown) using a Passenger Boarding Bridge (hereinafter referred to as "PBB") 2. As shown in FIG. 3, the PBB 3 is a facility having a tunnel 31 which is a passage connecting between a cab 33 which is an end portion connecting to the entrance / exit of the airliner and a rotunda 37 which is an end portion on the airport building side disposed in the airport building.

[0003] The rotunda 37 is connected to the airport building, the tunnel 31 is attached to a column 34 having wheels 34a, and the cab 33 extends with respect to the rotunda 37 by the forward movement of the wheels 34a to connect to the entrance / exit of the airliner, and the cab 33 contracts with respect to the rotunda 37 by the backward movement of the wheels 34a to separate from the entrance / exit of the airliner. Passengers board the airliner or disembark from the airliner through the tunnel 31 extending between the cab 33 and the rotunda 37.

[0004] The PBB 3 is laid in such a manner that a fixing column 135 of the rotunda 37 of the PBB 3 is fixed to an existing base (hereinafter referred to as "existing base") 11 which is already installed in the airport in advance for fixing the PBB. With reference to FIGS. 3, 4A and 4B, the existing base 11 will be described. The existing base 11 has a central axis CL defined so as to extend in the vertical direction from the ground G, protrudes in the vertical direction from the ground G, and has a cylindrical shape. A part of the existing base 11 is buried in the ground. The existing base 11 is installed in advance on the airport side on the airport building side for laying the PBB 3. The existing base 11 is made of concrete. The existing base 11 typically has a two-stage cylindrical shape with different diameters and different thicknesses from the central axis CL. The existing base 11 is provided with a metal fixing plate 12 on its upper surface. The fixing plate 12 is typically circular, and its center O is arranged to coincide with the position of the central axis CL of the existing base 11. The fixing plate 12 is fixed as a part of the upper surface of the existing base 11 by a plurality of anchor bolts 13. The anchor bolts 13 are arranged on a circumference 12a with a predetermined diameter around the center O of the fixing plate 12 so as to equally divide the central angle at a predetermined angle. For example, as shown in FIGS. 4A and 4B, eight anchor bolts 13 are arranged on a circumference 12a with a predetermined diameter around the center O of the fixing plate 12 at every 45 degrees of the central angle. The plurality of anchor bolts 13 of the metal fixing plate 12 also function as bolts for fixing the fixing column 135 of the rotunda 37 of PBB3 to the existing base 11. The fixing column 135 has a flange where the mounting hole 135a is arranged. When fixing the fixing column 135 of the rotunda 37 of PBB3 to the existing base 11, the mounting hole 135a is inserted into the plurality of anchor bolts 13, and the fixing column 135 is fixed by pressing the flange having the mounting hole 135a against the upper surface of the existing base 11 provided with the fixing plate 12 with the PBB fixing nut 136.

Summary of the Invention

Problems to be Solved by the Invention

[0005] In recent PBB3s, in order to ensure the safety of passengers during boarding and alighting, it is required to reduce the gradient of PBB3, so the length of PBB3 has inevitably become longer. Therefore, the weight of recent PBB3s has increased compared to previous PBB3s, and a greater load due to bending moment is applied to the rotunda 37 of PBB3 than to previous PBB3s.

[0006] In existing airports where previous PBB3s before enlargement were installed, it has become more common to update from previous PBB3s to enlarged PBB3s. Such existing bases of existing airports are subjected to a load due to a large bending moment from the rotunda 37 of PBB3.

[0007] However, since the existing base 11 already installed at the airport for fixing PBBs was made according to the specifications of the previous PBB3, when laying PBB3 on the existing base 11, there is a problem that the existing base 11 already installed at the airport does not conform to the specifications of the large PBB3.

[0008] Regarding this, if the existing base 11 is broken and a new base 11 is remade so that the existing base 11 has the strength corresponding to the size of the PBB3 with increasing size, it will be a major construction, requiring a long construction period and a large cost.

[0009] When laying PBB3 on the existing base 11 at the airport, without remaking the existing base 11 anew, if the existing base 11 can be diverted and reinforced so that it has the strength corresponding to the size of the PBB3 with increasing size, and the PBB3 can be fixed, then the large PBB3 can be laid in a short period at low cost. Thus, a reinforced base 1 obtained by reinforcing the existing base 11 and a method for reinforcing the base for reinforcing the existing base are required.

Means for Solving the Problem

[0010] A method for reinforcing an existing base installed at an airport for fixing a PBB, the method comprising: an existing base perforation step of drilling a plurality of holes through the fixing plate on the upper surface of the existing base; an additional anchor fixing step of fixing a plurality of additional anchor bolts to the plurality of holes; a conversion adapter fixing step of fixing a conversion adapter to the plurality of existing anchor bolts and the plurality of additional anchor bolts, the conversion adapter being positioned parallel to the fixing plate in a state where the conversion adapter is fixed to the plurality of existing anchor bolts and the plurality of additional anchor bolts, and the conversion adapter fixing step comprising a conversion adapter PBB fixing bolt extending in the vertical direction for fixing the PBB; and a mortar molding step of filling and molding non-shrinking mortar on the upper part of the existing base. The problem is solved by the method for reinforcing the base of the PBB.

[0011] A reinforced base in which an existing base installed at an airport for fixing a PBB has been reinforced, the existing base protruding vertically from the ground of the airport, a fixing plate having a plurality of existing anchor bolts for fixing the PBB arranged to extend in the vertical direction being fixed to the upper surface of the existing base, the reinforced base being fixed to the plurality of existing anchor bolts of the existing base and a plurality of additional anchor bolts newly fixed to the upper surface of the existing base, and comprising a conversion adapter having a plate member positioned parallel to the fixing plate, a conversion adapter PBB fixing bolt extending in the vertical direction for fixing the PBB, and non-shrinking mortar filled and molded on the upper part of the existing base. The problem is solved by the reinforced base.

Advantages of the Invention

[0012] Without newly reconstructing the existing base, it is possible to utilize and reinforce the existing base to provide strength corresponding to the increasing size of the PBB, and to fix a large PBB.

Brief Description of the Drawings

[0013]

Figure 1A

Figure 1B

Figure 1C

Figure 1D

Figure 1E

Figure 2

Figure 3

Figure 4A

Figure 4B

Embodiments for Carrying Out the Invention

[0014] [Embodiment 1] (Existing base for PBB fixing) The present invention is a base reinforcement method and a reinforced base for reinforcing the conventional existing base 11 in order to fix the large PBB3. First, regarding the existing base 11 to which the present invention is applied, with reference to FIGS. 3, 4A, and 4B, the existing base 11 for fixing the existing PBB3 before the present invention is applied will be described. The existing base 11 has a central axis CL defined so as to extend in the vertical direction from the ground G, protrudes in the vertical direction from the ground G, and has a cylindrical shape. The existing base 11 is installed in advance on the airport side on the airport building side for laying the PBB3. The existing base 11 is made of concrete. The existing base 11 typically has a two-stage cylindrical shape with different thicknesses and different diameters from the central axis CL.

[0015] The existing base 11 is provided with a metal fixing plate 12 on the upper surface. The fixing plate 12 is arranged horizontally. The fixing plate 12 is typically circular, and its center O is arranged to coincide with the position of the central axis CL of the existing base 11. The fixing plate 12 is horizontally fixed as a part of the upper surface of the existing base 11 by a plurality of anchor bolts 13. The rows of anchor bolts 13 are arranged such that the anchor bolts (existing anchor bolts) 13 are evenly divided by a central angle at a predetermined angle on a circumference 12a with a predetermined diameter around the center O of the fixing plate 12 and are aligned on the circumference. The anchor bolts 13 are arranged and welded so as to extend in the vertical direction from the surface of the fixing plate 12. For example, as shown in FIGS. 4A and 4B, eight anchor bolts 13 are arranged on a circumference 12a with a predetermined diameter around the center O of the fixing plate 12 at every 45 degrees of the central angle. However, the interval and number of the central angles at which the anchor bolts 13 are arranged are not limited to this.

[0016] The plurality of anchor bolts 13 of the metal fixing plate 12 also function as bolts for fixing the fixing column 135 of the rotunda 37 of the PBB3 to the existing foundation base 11. The fixing column 135 has a flange where the mounting holes 135a are arranged. When fixing the fixing column 135 of the rotunda 37 of the PBB3 to the existing foundation base 11, the mounting holes 135a are inserted into the plurality of anchor bolts 13, and the fixing column 135 presses and fixes the flange having the mounting holes 135a against the upper surface of the existing foundation base 11 provided with the fixing plate 12 with the PBB fixing nut 136.

[0017] (Reinforced foundation base for PBB fixing to which the present invention is applied) Next, embodiments of the present invention will be described with reference to FIGS. 1A to 3. FIG. 1A is a perspective view of the reinforced foundation base 1 for fixing the PBB3 to which the foundation base reinforcement method of the present invention is applied. FIG. 1B is a perspective view of the reinforced foundation base for PBB fixing to which the foundation base reinforcement method of the present invention is applied. FIG. 1C is a cross-sectional view seen from the side of the reinforced foundation base for PBB fixing to which the foundation base reinforcement method of the present invention is applied. FIG. 1D is a top view of the reinforced foundation base for PBB fixing to which the foundation base reinforcement method of the present invention is applied, as seen from the arrow B in FIG. 1B. FIG. 1E is a top view of the reinforced foundation base for PBB fixing to which the foundation base reinforcement method of the present invention is applied, as seen from the arrow C in FIG. 1B. FIG. 2 is a flowchart of each step of the foundation base reinforcement method of the present invention. FIG. 3 is a view showing the PBB3 to which the present invention is applied.

[0018] The foundation base reinforcement method of the present invention includes an existing foundation base drilling step (S1), an additional anchor bolt fixing step (S2), a conversion adapter fixing step (S3), and a mortar molding fixing step (S4). Each step is typically executed in this order, as shown in FIG. 2, for example. After the reinforcement of the existing foundation base 11 is completed, after the mortar molding step, a fixing step (S5) for fixing the PBB3 is executed.

[0019] In the method for reinforcing the base of the present invention, a conversion adapter 22 is used. The conversion adapter 22 is disposed above the fixing plate 12 of the existing base 11 in the vertical direction. The conversion adapter 22 includes a lower member 221 of the conversion adapter plate, an upper member 222 of the conversion adapter plate, and a plurality of conversion adapter PBB fixing bolts 23. The lower member 221 of the conversion adapter plate is a member disposed to face the fixing plate 12 of the existing base 11.

[0020] The lower member 221 of the conversion adapter plate and the upper member 222 of the conversion adapter plate are plate-shaped members made of metal. The lower member 221 of the conversion adapter plate and the upper member 222 of the conversion adapter plate can be in the shape of a disc having a center O. The lower member 221 of the conversion adapter plate and the upper member 222 of the conversion adapter plate are fixed so as to be parallel to each other with a predetermined interval. For example, the lower member 221 of the conversion adapter plate and the upper member 222 of the conversion adapter plate can be fixed so as to be parallel to each other with a predetermined interval by the conversion adapter PBB fixing bolts 23. When the lower member 221 of the conversion adapter plate and the upper member 222 of the conversion adapter plate are fixed parallel to each other with a predetermined interval, the conversion adapter PBB fixing bolts 23 extend perpendicular to each of the lower member 221 of the conversion adapter plate and the upper member 222 of the conversion adapter plate. Further, an imaginary line connecting the respective centers O of the lower member 221 of the conversion adapter plate and the upper member 222 of the conversion adapter plate constitutes the central axis CL of the conversion adapter 22, and the central axis CL is perpendicular to each of the lower member 221 of the conversion adapter plate and the upper member 222 of the conversion adapter plate. This central axis CL is defined as the central axis CL (center O) of the conversion adapter 22. The diameter of the conversion adapter PBB fixing bolts 23 is preferably selected to be larger than the diameter of the anchor bolts 13 used for fixing the previous PBB.

[0021] The conversion adapter PBB fixing bolts 23 are typically arranged around the central axis CL at a predetermined angle to equally divide the central angle around the respective centers O of the lower member 221 and the upper member 222 of the conversion adapter plate. For example, the conversion adapter PBB fixing bolts 23 are arranged in four directions perpendicular to each other at every 90-degree central angle around the central axis CL (center O) of the conversion adapter 22. The conversion adapter PBB fixing bolts 23 can be arranged, for example, in sets of two in each of the four directions, for a total of eight conversion adapter PBB fixing bolts 23. The conversion adapter PBB fixing bolts 23 are arranged, for example, on a circumference with a diameter larger than the central circumference 12a around the center O in the fixing plate 12 of the existing base 11. That is, when the central axis CL of the conversion adapter 22 is defined to pass through the center O of the fixing plate 12, the conversion adapter PBB fixing bolts 23 are located outside the plurality of anchor bolts 13 for fixing the fixing column 35 of the enlarged PBB to the existing base 11 with respect to the center O.

[0022] The conversion adapter 22 has, at least in the lower member 221 of the conversion adapter plate, a plurality of fixing holes drilled at positions corresponding to the positions of the respective anchor bolts 13 in the row of the anchor bolts 13 of the fixing plate 12 in a state where the central axis CL (center O) of the conversion adapter 22 and the central axis CL (center O) of the fixing plate 12 are aligned. That is, at least in the lower member 221 of the conversion adapter plate, a plurality of fixing holes corresponding to the number and positions of the anchor bolts 13 are drilled on a circumference having the same diameter as the circumference 12a of the fixing plate 12. Further, the lower member 221 of the conversion adapter plate has additional holes as fixing holes at a predetermined number of locations among the spaces between the bolts of the anchor bolts 13. The additional holes as fixing holes are for passing through the additional anchor bolts 21 described later, which are necessary to support the conversion adapter 22 on the existing foundation base 11 and to ensure the strength for the conversion adapter 22 to support a PBB larger than the PBB assumed on the existing foundation base 11. That is, the fixing holes are composed of the fixing holes corresponding to the anchor bolts 13 of the fixing plate 12 and the additional holes newly drilled as fixing holes at a predetermined number of locations among the spaces between the bolts of the anchor bolts 13. The predetermined number, which is the number of the additional holes as fixing holes, is determined by the strength of the additional anchor bolts 21 that can support the conversion adapter 22 on the existing foundation base 11 and that can support a PBB larger than the PBB assumed on the existing foundation base 11. For example, taking the example of the eight existing anchor bolts 13 in this specification, the additional holes as fixing holes are drilled between four out of the eight spaces between adjacent existing anchor bolts 13. Hereinafter, this example will be described. Note that the additional holes may be arranged at least in the lower member 221 of the conversion adapter plate, but may also be arranged in both the lower member 221 and the upper member 222 of the conversion adapter plate. When arranged in both the lower member 221 and the upper member 222 of the conversion adapter plate, the additional holes drilled in the upper member 222 of the conversion adapter plate are at positions corresponding to the positions of the additional holes in the lower member 221 of the conversion adapter plate along the central axis CL (center O) of the conversion adapter 22. Hereinafter, an example having fixing holes only in the lower member 221 of the conversion adapter plate will be described.

[0023] <Existing Foundation Base Drilling Process (S1)> The existing foundation base drilling process (S1) is a process of newly drilling a plurality of holes in the upper surface of the existing foundation base 11. For example, a plurality of holes are newly drilled through the fixing plate 12 fixed to the existing foundation base 11. A plurality of holes may be newly drilled outside the fixing plate 12. The plurality of holes to be drilled are for inserting the additional anchor bolts 21, and the plurality of holes to be drilled are located at the positions of the additional anchor bolts 21. Hereinafter, an example of newly drilling a plurality of holes through the fixing plate 12 fixed to the existing foundation base 11 will be described. The plurality of holes are drilled around the center O of the fixing plate 12 so as to reach the existing foundation base 11 of the concrete part through the fixing plate 12. The plurality of holes are typically drilled on the circumference where the plurality of existing anchor bolts 13 are arranged. The plurality of holes are drilled at positions corresponding to the holes drilled in the lower member 221 of the conversion adapter plate of the conversion adapter 22. That is, for example, holes corresponding to the additional holes for the additional anchor bolts 21 of the lower member 221 of the conversion adapter plate are additionally drilled between the adjacent existing anchor bolts 13 in the fixing plate 12. For example, in the examples from FIG. 1A to FIG. 1E, out of the 8 existing anchor bolts 13, holes are drilled at 4 locations between the adjacent existing anchor bolts 13, and a total of 12 holes are drilled. Typically, the diameter of the holes additionally drilled is smaller than the effective diameter of the additional anchor bolts 21 described later.

[0024] <Additional Anchor Bolt Fixing Process (S2)> The additional anchor fixing step (S2) is a step of fixing a plurality of additional anchor bolts 21 to holes additionally drilled in the fixing plate 12 of the existing foundation base 11 by the existing foundation base drilling step (S1). In the anchor fixing step (S2), a plurality of additional anchor bolts 21 are fitted into a plurality of holes additionally drilled in the existing foundation base drilling step (S1). After the plurality of additional anchor bolts 21 are fitted into the plurality of holes drilled in the existing foundation base 11, resin as a chemical anchor is injected and filled into the gap between the inner wall of the hole additionally drilled in the existing foundation base 11 and the plurality of additional anchor bolts 21 to fix them. The resin as a chemical anchor is, for example, vinyl ester resin, but is not limited thereto. The filling method of the chemical anchor is, for example, inserting a capsule filled with resin into the hole before fitting the plurality of additional anchor bolts 21 into the holes drilled in the existing foundation base 11, and fitting the additional anchor bolts 21 into the holes, whereby the capsule is broken and the resin is filled into the gap between the inner wall of the hole and the additional anchor bolts 21.

[0025] After the additional anchor bolts 21 are fitted into the existing foundation base 11 and completely fixed with the chemical anchor, subsequently, each hole edge of the plurality of holes in the fixing plate 12 and each of the plurality of additional anchor bolts 21 are fixed by welding. Each hole edge of the plurality of holes additionally drilled in the fixing plate 12 and each of the plurality of additional anchor bolts 21 are directly welded. Also, in this welding, a member (not shown) having a diameter smaller than the diameter of each of the plurality of holes may be fitted to each of the plurality of additional anchor bolts 21, the member and the plurality of additional anchor bolts 21 are welded, and the member and each hole edge of the plurality of holes in the fixing plate 12 are welded. Thereby, the fixing plate 12 is fixed to the foundation base 11 in a more reinforced and firm state than before.

[0026] <Conversion adapter fixing step (S3)> Attach the conversion adapter 22 to the existing anchor bolts 13 and the additional anchor bolts 21 of the existing base 11. Specifically, pass the existing anchor bolts 13 and the additional anchor bolts 21 through the fixing holes of the conversion adapter 22, and thread the conversion adapter fixing nut 21a onto the existing anchor bolts 13 and the additional anchor bolts 21 to fix the conversion adapter 22 to the existing base 11. This fixing is performed such that the central axis CL of the conversion adapter 22 and the central axis CL of the existing base 11 are coaxial. And by this fixing, the conversion adapter PBB fixing bolt 23 of the conversion adapter 22 is attached to the existing base 11 such that it is parallel to the central axis CL of the conversion adapter 22 and the central axis CL of the existing base 11.

[0027] When both the existing anchor bolt 13 and the additional anchor bolt 21 have threads throughout, the conversion adapter fixing nuts 21a can be respectively arranged above and below the conversion adapter 22 of the lower member 221 of the conversion adapter plate, and in each of the existing anchor bolt 13 and the additional anchor bolt 21, the conversion adapter 22 can be clamped by the conversion adapter fixing nut 21a above the conversion adapter 22 and the conversion adapter fixing nut 21a below the conversion adapter 22. Or, the existing anchor bolt 13 and the additional anchor bolt 21 have steps, and the fixing holes of the lower member 221 of the conversion adapter plate penetrate the threaded portions of the existing anchor bolt 13 and the additional anchor bolt 21 but do not penetrate the steps, and the conversion adapter 22 can also be supported and fixed by the steps of the existing anchor bolt 13 and the additional anchor bolt 21 and the conversion adapter fixing nut 21a. Also, although the method of fixing with the conversion adapter fixing nut 21a has been described here, the lower member 221 of the conversion adapter plate, the existing anchor bolt 13, and the additional anchor bolt 21 may be fixed by welding or the like. The conversion adapter 22 has a plate that becomes horizontal when the conversion adapter 22 is fixed to the existing base 11 by the existing anchor bolt 13 and the additional anchor bolt 21. In this embodiment, for example, the upper member 222 of the conversion adapter plate becomes horizontal when the conversion adapter 22 is fixed to the existing base 11 by the existing anchor bolt 13 and the additional anchor bolt 21. For example, the lower member 221 of the conversion adapter plate and the upper member 222 of the conversion adapter plate are configured to be parallel, and by horizontally fixing the lower member 221 of the conversion adapter plate to the upper surface of the horizontal existing base 11, the upper member 222 of the conversion adapter plate becomes horizontal.

[0028] <Mortar Molding Process (S4)> After the conversion adapter 22 is fixed to the existing base 11, it is molded with non-shrinking mortar on the upper part of the existing base 11. That is, the non-shrinking mortar is filled without gaps inside the conversion adapter 22 and between the conversion adapter 22 and the existing base 11. The inside of the conversion adapter 22 is between the lower member 221 of the conversion adapter plate and the upper member 222 of the conversion adapter plate, and the non-shrinking mortar is filled here without gaps. Then, on the outside of the conversion adapter 22, the non-shrinking mortar is filled in a cylindrical shape so as to have the same diameter as the outer circumference of the existing base 11, and the conversion adapter 22 is molded so as to be hidden by the non-shrinking mortar. The upper part of the non-shrinking mortar is molded as a horizontal surface so that the fixing column 35 of the rotunda 37 of the PBB3 of the enlarged PBB can be fixed.

[0029] <PBB Fixing Step (S5)> With the mortar molding step (S4), the reinforcement of the existing base 11 is completed. After this, subsequently, the fixing step (S5) of fixing the PBB3 can be executed. In the fixing of the PBB3, the conversion adapter PBB fixing bolt 23 of the conversion adapter 22 is passed through the mounting hole 35a of the flange of the fixing column 35 of the rotunda 37 of the PBB3 of the enlarged PBB and fixed with the PBB fixing nut 36. The fixing column 35 has a hollow cylindrical shape inside. The inner diameter of the fixing column 35 is larger than the circumference where the existing anchor bolt 13 and the additional anchor bolt 15 are located, and the fixing column 35 does not interfere with the existing anchor bolt 13 and the additional anchor bolt 21.

[0030] By attaching the conversion adapter 22 to the existing base 11 on the fixing plate 12, the existing base 11 is firmly reinforced, so without changing the existing base 11, the reinforced fixing plate 12 and the conversion adapter 22 have the advantageous effect of withstanding the external load received from the large PBB3.

Explanation of Reference Signs

[0031] 1 PBB Fixing Part 11 Existing Base 12 Fixing Plate 12a Bolt Arrangement Circumference 12b Bolt Arrangement Circumference 13 Existing anchor bolts 21 Additional anchor bolts 22 Conversion adapter 23 Conversion adapter PBB fixing bolt 24 Non-shrink mortar additional forming part 31 Tunnel 33 Cab 34 Column 34a Wheel 35 Fixing column (for enlarged PBB) 36 PBB fixing nut 37 Rotunda 221 Lower member of conversion adapter plate 222 Upper member of conversion adapter plate 135 Fixing column (for conventional PBB)

Claims

1. A method for reinforcing an existing foundation already installed at an airport for fixing a PBB, comprising: The existing foundation is protruding vertically from the ground of the airport, and a horizontal fixing plate is fixed to an upper surface of the existing foundation, the horizontal fixing plate being arranged so that a plurality of existing anchor bolts for fixing the PBB extend in the vertical direction; The foundation reinforcement method includes: an existing foundation drilling step of drilling a plurality of holes on the upper surface of the existing foundation; an additional anchor fixing step of fixing a plurality of additional anchor bolts into the plurality of holes; a conversion adapter fixing step of fixing a conversion adapter to the plurality of existing anchor bolts and the plurality of additional anchor bolts, the conversion adapter being positioned parallel to the fixing plate in a state in which the conversion adapter is fixed to the plurality of existing anchor bolts and the plurality of additional anchor bolts, and including a conversion adapter PBB fixing bolt extending in the vertical direction for fixing a PBB; A mortar molding process for filling and molding non-shrink mortar on top of the existing foundation.

2. The method for reinforcing a foundation according to claim 1, The plurality of existing anchor bolts are arranged circumferentially on the fixing plate, The position where the plurality of holes are drilled is the circumference where the plurality of existing anchor bolts are arranged.

3. The method for reinforcing a foundation according to claim 1, A foundation reinforcing method in which the position of the conversion adapter PBB fixing bolt is outside the positions of the multiple existing anchor bolts relative to the center of the existing foundation.

4. The method for reinforcing a foundation according to any one of claims 1 to 3, the additional anchor bolts are fixed by welding the edges of the holes to the additional anchor bolts, and resin is filled between the additional anchor bolts and the inner walls of the holes.

5. A reinforced foundation is a reinforced foundation that reinforces an existing foundation already installed at an airport for fixing a PBB, The existing foundation is protruding vertically from the ground of the airport, and a horizontal fixing plate is fixed to an upper surface of the existing foundation, the horizontal fixing plate being arranged so that a plurality of existing anchor bolts for fixing the PBB extend in the vertical direction; The reinforcing base is a conversion adapter including a plate member that is fixed to the plurality of existing anchor bolts of the existing foundation and to the plurality of additional anchor bolts newly fixed to the upper surface of the existing foundation and is positioned parallel to the fixing plate; A conversion adapter PBB fixing bolt extending in the vertical direction for fixing a PBB; A reinforced foundation comprising non-shrinkage mortar filled and molded on top of the existing foundation.

6. The reinforcing base according to claim 5, The plurality of existing anchor bolts are arranged circumferentially on the fixing plate, The reinforced foundation, wherein the plurality of additional anchor bolts are arranged on the circumference on which the plurality of existing anchor bolts are arranged.

7. The reinforcing base according to claim 5, A reinforced foundation in which the position of the conversion adapter PBB fixing bolt is outside the positions of the multiple existing anchor bolts with respect to the center of the existing foundation.

8. A reinforcing base according to any one of claims 5 to 7, The multiple additional anchor bolts are fitted into multiple holes drilled in the upper surface of the existing foundation, the edges of the multiple holes are fixed to the multiple additional anchor bolts by welding, and resin is filled between each of the multiple additional anchor bolts and each of the multiple holes.

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