KR20240106722A - FRP Deck Struture and Its Installation Method for Concrete Track Installation - Google Patents

Abstract

The present invention relates to an assembly structure and method for assembling an FRP floor plate for a concrete running track that allows for easy assembly and disassembly of the FRP floor plate installed on a basic structure for the construction of a concrete running track.
The assembly structure of the FRP floor plate for a concrete running track of the present invention is an assembly structure of an FRP floor plate for a concrete running track in which FRP floor plates installed on a basic structure are assembled in the width direction for the construction of a concrete running track, The FRP floor plate includes a lower plate coupled to the upper surface of the basic structure, an upper plate with a smaller width than the lower plate, a center web vertically connecting the centers of the upper plate and the lower plate, and slanting both ends of the upper plate and the lower plate. A side web for connecting, a first connection flange extending to one end of the lower plate and having a first assembly upper surface tapered downward toward the outer end, and extending to the other end of the lower plate to the first assembly upper surface of the first connection flange. It includes a second connection flange having a second assembly lower surface tapered for assembly, and a bolt hole is formed in the first connection flange and the second connection flange of the FRP floor plate to pass through an anchor bolt provided in the basic structure to be fixed. It is fixed by screwing bolts, and the opening formed between both side webs of the FRP floor plate assembled in the width direction is designed to be removably shielded with a shielding plate.

Description

Assembly structure and assembly method of FRP floor plate for concrete running track {FRP Deck Struture and Its Installation Method for Concrete Track Installation}

The present invention relates to the assembly structure and assembly method of an FRP floor plate for a concrete running track, and more specifically, to a concrete running track that can easily assemble and dismantle the FRP floor plate installed on the basic structure for the construction of a concrete running track. This relates to the assembly structure and assembly method of FRP floor plates for tracks.

As is well known, FRP (fiber reinforced plastics) is a plastic composite material reinforced with glass and carbon fibers, and is a high-performance and highly functional material with excellent light weight, corrosion resistance, and formability.

FRP materials are installed at the bottom of concrete to build tracks or bridges, reducing the cross-sectional area and reducing weight.

As a prior art using such FRP material, Republic of Korea Patent No. 10-1298581 (registration date August 14, 2013) 'Connection of floor plate and girder by snap-fit and adhesive mixed assembly between fiber reinforced composite material tech tubes' 'Structure and connection method', Republic of Korea Patent No. 10-0769222 (registration date October 16, 2007) 'Connection structure of hollow FRP bottom plate and mold', etc. are disclosed.

The gist of the prior art is the combined structure of the FRP deck (floor plate) and girder (mould).

In contrast, as a prior art using FRP material, Republic of Korea Patent No. 10-0502583 (registration date July 12, 2005) ‘Mechanical connection structure of precast floor plate members made of composite materials’, Republic of Korea Patent No. 10 -0563718 (registration date: March 16, 2006) ‘Girder bridge deck construction method using glass fiber reinforced composite precast deck panels with hollow cross-section’ and Korea Registered Patent No. 10-1991765 (registration date) June 17, 2019) 'Assembly structure of FRP panel with snap-fit combination locking and panel separation and replacement using symmetrical FRP panel and cover-type connection panel, floor plate equipped with it, and construction method thereof', etc. It has been disclosed.

The gist of the prior art is a structure for assembling a plurality of FRP floor plates (panels).

As a prior art using another FRP material, Republic of Korea Patent No. 10-0568903 (registration date April 3, 2006) ‘Composite floor plate with shear connector made of hybrid fiber-reinforced plastic’, a Korean registered patent. No. 10-0641607 (registration date: October 26, 2006) ‘Fiber-reinforced plastic floor plate module with integrated shear connector and concrete composite floor plate using the same’ and Korea Registered Patent No. 10-0835901 (registration date: June 2, 2008) 1) 'A fiber-reinforced plastic composite floor plate in which a fiber-reinforced plastic floor plate and the upper floor concrete are integrally combined and a method of manufacturing the same' are disclosed.

The gist of the prior art is a structure in which concrete is poured on top of the FRP floor.

However, the above-described prior art had the following problems.

First, in order to prevent the vertical connection connecting the FRP floor plate from spreading on both sides due to repeated loads, when multiple bolts are installed from top to bottom of the connection, glass or carbon fiber is formed through the multiple perforations formed in the connection. There was a problem that it could short-circuit and weaken structural performance.

Second, because the flanges that connect the FRP floor plate to the girder overlap, there was a problem that the load was concentrated due to an increase in the thickness of the cross section, which could cause the flange to fall off.

Third, according to existing research literature, it is known that delemination occurring at the right angle of FRP floor plates is the main cause of failure, but the conventional technology had the problem of being vulnerable to destruction because the connection of the FRP floor plate was formed at the right corner.

Fourth, since the FRP floor plate is joined to the girder and then other FRP floor plates are assembled by fitting, there is a problem in that the assembled FRP floor plates cannot be combined to the girder at the same time, which takes a lot of work time.

Fifth, when a shear connector was provided on the FRP floor plate to integrate the concrete poured on the FRP floor plate, the shear connector protruded from the FRP floor plate, causing problems with loading and transportation.

(0001) Republic of Korea Patent No. 10-1298581 (registration date: August 14, 2013) (0002) Republic of Korea Patent No. 10-0769222 (registration date: October 16, 2007) (0003) Republic of Korea Patent No. 10-0502583 (registration date: July 12, 2005) (0004) Republic of Korea Patent No. 10-0641607 (registration date: October 26, 2006) (0005) Republic of Korea Patent No. 10-1991765 (registration date: June 17, 2019) (0006) Republic of Korea Patent No. 10-0568903 (registration date April 3, 2006) (0007) Republic of Korea Patent No. 10-0641607 (registration date: October 26, 2006) (0008) Republic of Korea Patent No. 10-0835901 (registration date: June 2, 2008)

The present invention was devised to solve the conventional problems as described above. The purpose of the present invention is to form a connection connecting FRP floor plates in a structurally weak area to secure resistance against destruction and at the same time secure the perforation area. The purpose is to provide an assembly structure and assembly method for an FRP floor plate for a concrete running track that can minimize short circuiting of fibers.

Another object of the present invention is to shorten the construction period by improving the assembly efficiency by simultaneously assembling the FRP floor plate and installing it on the basic structure, and to shorten the construction cost and construction period by integrating the FRP floor plate and the concrete poured on it. The purpose is to provide an assembly structure and assembly method of an FRP floor plate for a concrete running track that can be designed.

The assembly structure of the FRP floor plate for a concrete running track of the present invention to achieve the above object is an FRP floor plate for a concrete running track in which FRP floor plates installed on a basic structure are assembled in the width direction for the construction of a concrete running track. In the assembled structure, the FRP floor plate includes a lower plate coupled to the upper surface of the basic structure, an upper plate with a width smaller than the lower plate, a center web vertically connecting the centers of the upper plate and the lower plate, and the upper plate and the lower plate. A side web that obliquely connects both ends of the lower plate, a first connection flange extending to one end of the lower plate and having a first assembly upper surface tapered downward toward the outer end, and a first connection flange extending to the other end of the lower plate of the first connection flange. It includes a second connection flange having a second assembly lower surface tapered to be assembled to the first assembly top surface, and the first connection flange and the second connection flange of the FRP floor plate are provided with bolts so as to penetrate anchor bolts provided in the basic structure. Holes are formed and fixed by screwing fastening bolts, and the openings formed between both side webs of the FRP floor plate assembled in the width direction are removably shielded with shielding plates.

The first connection flange and the second connection flange may be joined by an adhesive applied to the first assembly upper surface or the second assembly lower surface.

A key hole is formed in the shielding plate to position the anchor bolt at a vertical lower portion, and a shear key can be inserted into the key hole.

The shear key may include a horizontal plate mounted on the upper surface of the second connection flange, and a vertical plate vertically connected to both ends of the horizontal plate.

The vertical plate of the shear key may be formed to be vertically long so as to protrude toward the top of the shield plate.

The shear key may be made of a square pipe with a hollow interior and a square cross-section so that it can be inserted into the keyhole.

At this time, a filling hole may be formed in the lower part of the shear key to fill the space between the front and rear partition plates with concrete.

Dividing plates may be installed in the openings corresponding to the front and rear of the anchor bolts to partition the pouring area of the concrete injected through the keyhole.

In order to achieve the above object, the method of assembling an FRP floor plate for a concrete running track of the present invention includes the steps of installing a basic structure; Embedding anchor bolts in the basic structure; Assembling the first connection flange and the second connection flange of the FRP floor plate aligned in the width direction by applying adhesive; Mounting the assembled FRP floor plate on the upper part of the basic structure and screwing fixing nuts to the anchor bolts penetrating the bolt holes; Installing a partition plate in the opening between the FRP floor plates corresponding to the front and rear of the anchor bolt; Arranging a shear key between the front and rear partition plates; Shielding the opening between the FRP bottom plates with a shielding plate having a keyhole formed to penetrate the shear key; And pouring concrete into an opening between the front and rear partition plates through the open top of the shear key and the key hole to pour a running track on the top of the FRP floor plate.

According to the present invention implemented as a solution described above, the connection flanges on both sides of the FRP floor plate are tapered to maximize the attachment surface, thereby preventing the flange from falling off due to the concentrated lower roof, and assembling it through a region other than the right corner. Therefore, durability can be expected to improve by overcoming the cause of vulnerability to destruction, and there is a very useful effect of preventing fiber short-circuiting in the relevant area in advance by forming multiple perforated areas for bolt fastening into one.

In addition, according to the present invention implemented as the above-mentioned solution, the FRP floor plate assembled in the width direction is first joined by an adhesive and then secondarily fixed to the basic structure by anchor bolts and fixing nuts, thereby strengthening the connection and at the same time securing the site. Working time can be reduced, and the FRP bottom plate and shear key are separated, so there are no protruding parts on the FRP bottom plate, which has the very useful effect of making loading and transportation easier.

Figure 1 is a cross-sectional view of an FRP floor plate according to an embodiment of the present invention.
Figure 2 is a cross-sectional view of the assembly of an FRP floor plate according to an embodiment of the present invention.
Figure 3 is an exploded cross-sectional view of an FRP floor plate according to an embodiment of the present invention.
Figure 4 is a perspective view of the assembly of an FRP floor plate according to an embodiment of the present invention.
Figure 5 is a perspective view showing a state in which a partition plate is installed inside an FRP floor plate according to an embodiment of the present invention.
Figure 6 is a perspective view showing the disassembled state of the shear key according to an embodiment of the present invention.
Figure 7 is a perspective view showing the state in which concrete is poured on the top of the FRP floor plate according to an embodiment of the present invention.
Figure 8 is a perspective view showing a disassembled state of a shear key according to another embodiment of the present invention.
Figure 9 is a perspective view showing a state in which concrete is poured on the top of an FRP floor plate according to another embodiment of the present invention.
Figure 10 is a perspective view showing the disassembled state of the shear key according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the attached drawings in order to fully understand the present invention.

Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. This example is provided to more completely explain the present invention to those with average knowledge in the art.

Accordingly, the shapes of components expressed in the drawings may be exaggerated to emphasize a clearer explanation, and it should be noted that the same members may be indicated by the same reference numerals in each drawing.

Additionally, detailed descriptions of well-known functions and configurations that are judged to unnecessarily obscure the gist of the present invention may be omitted.

The assembly structure of the FRP floor plate for a concrete running track according to an embodiment of the present invention includes an FRP floor plate 100 installed on the upper surface of the basic structure 10 and assembled in the width direction, and the assembled FRP floor plate 100. It includes a shielding plate 200 that shields the opening (OP) therebetween.

First, the basic structure 10 includes sections such as H-beams, I-beams, and U-beams, which are structural rolled steels, and beams.

Figure 1 is a cross-sectional view showing a cross-section in the width direction of an FRP floor plate according to an embodiment of the present invention, and Figure 2 is a cross-sectional view showing an assembled state of an FRP floor plate according to an embodiment of the present invention.

Referring to Figure 1, the FRP floor plate 100 includes a lower plate 110, an upper plate 120, a center web 130, a side web 140, a first connection flange 150, and a second connection flange 160. Includes.

The lower plate 110 is a plate installed on the upper surface of the basic structure 10 and has a larger width than the upper plate 120.

The upper plate 120 is a plate disposed at a predetermined interval on top of the lower plate 110 and has a smaller width than the lower plate 110.

The center web 130 vertically connects the centers of the upper plate 120 and the lower plate 110. Optionally, the center web 130 may be provided in plural pieces at predetermined intervals along the width direction to vertically connect the centers of the upper plate 120 and the lower plate 110.

The side web 140 obliquely connects both ends of the upper plate 120 and the lower plate 110. An elastic rim 141 is formed integrally with an assembly recess 142 on the upper outer surface of the side web 140. The elastic rim 141 is elastically opened and then restored by the assembly convex portion 210 that is unevenly assembled to the assembly recess 142, which will be described later.

The first connection flange 150 has a first assembly top surface 151 that extends from the right end of the lower plate 110 and tapers downward toward the outer end. A plurality of bolt holes BH are drilled in the first connection flange 150 along the axial direction and pass through the anchor bolt 20 provided perpendicular to the basic structure 10. The first connection flange 150 can be assembled to the second connection flange 160 and installed on the basic structure 10 at the same time.

The second connection flange 160 has a second assembly surface 161 that extends to the other end of the lower plate 110 and tapers upward toward the outer end. That is, the second assembly surface of the second connection flange 160 is assembled to the first assembly upper surface 151 of the first connection flange 150. A plurality of bolt holes BH are drilled in the second connection flange 160 along the axial direction and pass through the anchor bolt 20 provided perpendicular to the basic structure 10. The second connection flange 160 can be assembled to the first connection flange 150 and installed on the basic structure 10 at the same time.

First, the first connection flange 150 and the second connection flange 160 are joined with an adhesive such as epoxy applied to the first assembly top surface 151 or the second assembly bottom surface 161.

Afterwards, a fixing nut 40 is screwed to the anchor bolt 20 penetrating the bolt hole BH of the first connection flange 150 and the second connection flange 160, thereby forming the FRP floor plate 100 as a base. It has the function of being installed on the structure 10 and the function of assembling the FRP floor plate 100 in the width direction.

Figure 3 is a cross-sectional view showing the disassembled state of the FRP floor plate according to an embodiment of the present invention, and Figure 4 is a perspective view showing the assembled state of the FRP floor plate according to an embodiment of the present invention.

Referring to FIG. 3, the shielding plate 200 functions to shield the opening (OP) between the side webs 140 on both sides of the FRP floor plate 100 assembled in the width direction. Assembly iron parts 210 are integrally formed on both sides of the bottom of the shielding plate 200 and are detachably assembled to the assembly recess 142 of the FRP floor plate 100. The shielding plate 200 can be separated and repaired when a defect occurs, such as a screw loosening of the fixing nut 40.

Referring to FIG. 4, a key hole 220 is formed in the shielding plate 200 so that the anchor bolt 20 is positioned at the vertical lower part, and a shear key 500, which will be described later, is inserted into the key hole 220. These keyholes 220 are formed in plural numbers at predetermined intervals along the longitudinal direction of the shielding plate 200.

Figure 5 is a perspective view showing a state in which a partition plate is installed inside an FRP floor plate according to an embodiment of the present invention.

Referring to FIG. 5, partition plates 400 are installed in the openings OP corresponding to the front and rear of the anchor bolt 20 to partition the pouring area of the concrete 30 injected through the key hole 220.

Figure 6 is a perspective view showing the disassembled state of the shear key according to an embodiment of the present invention.

Referring to FIG. 6, the shear key 500 is inserted into the key hole 220 and becomes integrated with the concrete 30 poured on the top of the FRP floor plate 100. The shear key 500 includes a horizontal plate 511 seated on the upper surface of the second connection flange and a vertical plate 520 vertically connected to both ends of the horizontal plate 511, and has an approximately '┗┛' cross section. is formed Concrete 30 is injected between the front and rear partition plates 400 through the open upper space between the vertical plates 520 on both sides of the shear key 500 to integrate the FRP floor plate 100 and concrete 30.

In addition, the vertical plate 520 of the shear key 500 has a vertical length so as to protrude toward the top of the shield plate 200 and is responsible for shearing force.

In addition, a through hole 511 is formed in the horizontal plate 511 of the shear key 500 to penetrate the anchor bolt 20 and the fixing nut 40, so that when the shear key 500 is inserted into the keyhole 220, the anchor bolt Interference between (20) and the fixing nut (40) can be avoided.

Figure 7 is a perspective view showing the state in which concrete is poured on the top of the FRP floor plate according to an embodiment of the present invention.

Referring to FIG. 7, the concrete 30 forming the foundation of the running track is injected between the front and rear partition plates 400 of the opening OP through the key hole 220 to form the FRP floor plate 100 along with the shear key 500. It is poured at the top.

Meanwhile, Figure 8 is a perspective view showing a disassembled state of a shear key according to another embodiment of the present invention, and Figure 9 is a perspective view showing a state in which concrete is poured on the top of an FRP floor plate according to another embodiment of the present invention.

Referring to FIG. 8, the shear key 500 is implemented as a square pipe with a hollow interior and a square cross-section so that it can be inserted into the keyhole 220. The shear key 500 has a vertical length so as to protrude from the top of the shield plate 200 and is responsible for shearing force. Since the shear key 500 is formed in a hollow shape, interference between the anchor bolt 20 and the fixing nut 40 can be avoided when inserted into the key hole 220.

Referring to FIG. 9, the shear key 500 injects concrete 30 between the front and rear partition plates 400 through the open upper space to integrate the concrete 30 and the FRP floor plate 100, which form the foundation of the running track. promotes.

Figure 10 is a perspective view showing the disassembled state of the shear key according to another embodiment of the present invention.

Referring to Figure 10, a filling hole 530 is formed in the lower part of the shear key 500 of each pipe to fill the concrete 30 between the front and rear partition plates 400.

That is, the concrete 30 injected through the open top of the shear key 500 passes through the filling hole 530 and fills the space between the front and rear partition plates 400.

The method of assembling the FRP floor plate for a concrete running track according to an embodiment of the present invention configured as described above will be described in detail with reference to the attached drawings as follows.

The method of assembling an FRP floor plate for a concrete running track according to an embodiment of the present invention includes the steps of (a) installing the basic structure 10, (b) embedding anchor bolts 20 in the basic structure 10. , (c) applying adhesive to the first connection flange 150 and the second connection flange 160 of the FRP floor plate 100 aligned in the width direction and assembling it, (d) the assembled FRP floor plate 100 ) on the top of the basic structure (10) and fixing the fixing nut (40) to the anchor bolt (20) penetrating the bolt hole (BH) by screwing, (e) before and after the anchor bolt (20) Step of installing a partition plate 400 in the opening (OP) between the corresponding FRP floor plates 100, (f) placing a shear key 500 between the front and rear partition plates 400, (g) a shear key ( 500), shielding the opening (OP) between the FRP bottom plate 100 with a shielding plate 200 having a key hole 220 formed therethrough, (h) the open upper part of the shear key 500 and the key hole 220. It includes the step of pouring concrete 30 into the opening OP between the front and rear partition plates 400 and pouring the running track on the upper part of the FRP floor plate 100.

Step (a) is a step of installing a basic structure 10 suitable for constructing a concrete running track, and a structural rolled steel such as section steel can be used as the basic structure 10.

Step (b) is a step of embedding the vertical anchor bolt 20 in the upper part of the basic structure 10, and in the subsequent step (d), the bolt hole BH drilled in the FRP floor plate 100 penetrates.

Step (c) is a step of assembling a plurality of FRP floor plates 100 aligned in the width direction, by applying adhesive to the first connection flange and the second connection flange 160 of the FRP floor plate 100 discussed above. Assemble.

Step (d) is a step of fixing a plurality of FRP floor plates 100 assembled in the width direction to the upper part of the basic structure 10, and the FRP floor plate ( After penetrating the bolt hole (BH) of 100), the FRP floor plate 100 is fixed to the basic structure 10 by screwing the fixing nut 40 to the anchor bolt 20.

Step (e) is a step of installing the partition plate 400 in the opening (OP) formed between a plurality of FRP floor plates 100 assembled in the width direction. As shown in FIG. 5, the anchor bolt 20 The partition plates 400 are installed at the front and rear openings (OP), respectively.

Step (f) is a step of placing the shear key 500 between the front and rear partition plates 400 installed in the previous step (e), and the top of the shear key 500 is a shielding plate as shown in FIGS. 6 and 7. It protrudes to the top of (200) and is responsible for the shear force when pouring concrete (30).

Step (g) is a step of shielding the opening (OP) formed between a plurality of FRP floor plates 100 assembled in the width direction, and the shielding plate 200 is installed in the assembly recess 142 of the FRP floor plate 100. The assembly iron portion 210 is unevenly coupled to shield the opening (OP). A key hole 220 is formed in the shielding plate 200 to penetrate the upper end of the shear key 500 installed in the previous step (f).

In step (h), after installing the form around the shear key 500, concrete 30 is poured into the opening (OP) between the front and rear partition plates 400 through the open top of the shear key 500 and the key hole 220. In the step of injecting concrete 30, the concrete 30 cured through this process is poured into a running track so as to form one body with the FRP floor plate 100.

The embodiments of the present invention described above are merely illustrative, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom.

Therefore, it can be well understood that the present invention is not limited to the forms mentioned in the detailed description above.

Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims, and the present invention includes the technical spirit defined by the appended claims and all modifications, equivalents, and works within the scope thereof. It should be understood to include substitutes.

10: Basic structure 20: Anchor bolt
30: Concrete 100: FRP floor plate
200: shielding plate 400: partition plate
500: Shear key OP: Opening

Claims (9)

In the assembly structure of the FRP floor plate for the concrete running track in which the FRP floor plate installed on the basic structure is assembled in the width direction for the construction of the concrete running track,
The FRP floor plate includes a lower plate coupled to the upper surface of the basic structure, an upper plate with a smaller width than the lower plate, a center web vertically connecting the centers of the upper plate and the lower plate, and slanting both ends of the upper plate and the lower plate. A side web for connecting, a first connection flange extending to one end of the lower plate and having a first assembly upper surface tapered downward toward the outer end, and extending to the other end of the lower plate to the first assembly upper surface of the first connection flange. It includes a second connection flange having a second assembly lower surface tapered for assembly,
Bolt holes are formed in the first connection flange and the second connection flange of the FRP floor plate to pass through anchor bolts provided in the basic structure, and are fixed by screwing fastening bolts,
An assembly structure of an FRP floor plate for a concrete running track, wherein the opening formed between both side webs of the FRP floor plate assembled in the width direction is removably shielded with a shielding plate. In claim 1,
An assembly structure of an FRP floor plate for a concrete running track, wherein the first connection flange and the second connection flange are joined by an adhesive applied to the first assembly upper surface or the second assembly lower surface. In claim 1,
An assembly structure of an FRP floor plate for a concrete running track, wherein a key hole is formed in the shielding plate to position the anchor bolt at a vertical lower part, and a shear key is inserted into the key hole. In claim 3,
The shear key is an assembly structure of an FRP floor plate for a concrete running track, characterized in that it includes a horizontal plate seated on the upper surface of the second connection flange, and a vertical plate vertically connected to both ends of the horizontal plate. In claim 4,
The assembly structure of the FRP floor plate for a concrete running track, characterized in that the vertical plate of the shear key is formed to be vertically long so as to protrude above the shield plate. In claim 3,
The shear key is an assembly structure of an FRP floor plate for a concrete running track, characterized in that the shear key is made of a square pipe with a hollow interior and a square cross section to be inserted into the key hole. In claim 6,
An assembly structure of an FRP floor plate for a concrete running track, characterized in that a filling hole is formed in the lower part of the shear key to fill concrete between the front and rear partition plates. In claim 3,
The assembly structure of the FRP floor plate for a concrete running track, characterized in that partition plates are installed in the openings corresponding to the front and rear of the anchor bolts to partition the pouring area of the concrete injected through the key hole. In the method of assembling an FRP floor plate for a concrete running track,
Installing a foundation structure;
Embedding anchor bolts in the basic structure;
Assembling the first connection flange and the second connection flange of the FRP floor plate aligned in the width direction by applying adhesive;
Mounting the assembled FRP floor plate on the upper part of the basic structure and screwing fixing nuts to the anchor bolts penetrating the bolt holes;
Installing a partition plate in the opening between the FRP floor plates corresponding to the front and rear of the anchor bolt;
Arranging a shear key between the front and rear partition plates;
Shielding the opening between the FRP bottom plates with a shielding plate having a keyhole formed to penetrate the shear key; and
Pouring a running track on the top of the FRP floor plate by injecting concrete into an opening between the front and rear partition plates through the open top of the shear key and the keyhole;
A method of assembling an FRP floor plate for a concrete running track, comprising:

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