JP2021147840A - Road and construction method for the same - Google Patents

Abstract

To provide a road which makes an anchoring reinforcement of a precast wall balustrade more corrosion-resistant and enables the anchoring length of the anchoring reinforcement to be easily reduced.SOLUTION: A floor slab 2 has: a plurality of first receiving holes 15 arranged along an extension direction X of a road; and a plurality of second receiving holes 16 arranged outside the plurality of the first receiving holes 15 along the extension direction X. A precast wall balustrade 3 has: a plurality of first anchoring reinforcements 4 respectively inserted into the plurality of first receiving holes 15; and a plurality of second anchoring reinforcements 5 respectively inserted into the plurality of second receiving holes 16. The first anchoring reinforcements 4 are fixed to the floor slab 2 with a first mortar M1 charged into the first receiving holes 15. The second anchoring reinforcements 5 are fixed to the floor slab 2 with a second mortar M2 charged into the second receiving holes 16. The strength of the first and second mortars M1, M2 is 80 N/mm2 or more. The adhesion strength of the first and second anchoring reinforcements 4, 5 is 18 N/mm2 or more.SELECTED DRAWING: Figure 3

Description

The present invention relates to a road and a construction method thereof, and particularly to a structure of a wall railing.

The wall railings of bridges and highways may be precast to reduce construction time and on-site work. The precast wall balustrade is manufactured as a separate member from the deck and is attached to the deck on site. The precast wall balustrade may have anchorage bars protruding from the bottom, in which case the deck will have receiving holes into which the anchorage bars will be inserted. The precast wall balustrade is fixed to the deck by inserting the anchoring bar of the precast wall balustrade into the receiving hole and fixing it with mortar. Patent Document 1 discloses that a reinforcing bar in which a nut is screwed at the tip is used as a fixing bar in order to increase the pull-out resistance force.

JP-A-2019-148158

Since the fixing bar described in Patent Document 1 is a reinforcing bar, it has low resistance to corrosion due to salt, and it is difficult to reduce the frequency of maintenance and repair of the wall balustrade. In addition, the reinforcing bar has a limited adhesive strength and requires a long fixing length.

An object of the present invention is to provide a road having high resistance to corrosion of anchoring muscles of precast wall balustrades and easily suppressing anchoring length.

The present invention relates to a road having a deck and a precast wall balustrade attached to the deck. The deck has a plurality of first receiving holes arranged along the extending direction of the road and a plurality of second receiving holes arranged outside the plurality of first receiving holes along the extending direction. doing. The precast wall balustrade has a plurality of first anchoring muscles inserted into the plurality of first receiving holes, and a plurality of second anchoring muscles inserted into the plurality of second receiving holes, respectively. ing. The first anchoring bar is fixed to the deck with the first mortar filled in the first receiving hole, and the second anchoring bar is fixed to the deck with the second mortar filled in the second receiving hole. Has been done. Strength of the first and second mortar is at 80 N / mm ² or more, the adhesion strength of the first and second fixing muscle is 18N / mm ² or more.

According to the present invention, it is possible to provide a road having high resistance to corrosion of the fixing muscle of the precast wall balustrade and easily suppressing the fixing length.

It is a perspective view of the floor slab and the wall balustrade according to one Embodiment of this invention. It is a partially enlarged view of the floor slab and the wall balustrade shown in FIG. It is a side sectional view of the floor slab and the wall balustrade shown in FIG. It is a front view and a horizontal cross-sectional view of the wall balustrade shown in FIG. It is a conceptual diagram which shows the construction method of a wall balustrade. It is a side sectional view of the floor slab and the wall balustrade according to another embodiment.

Hereinafter, an embodiment of the road 1 of the present invention will be described with reference to the drawings. In each drawing, the extension direction X means the extension direction of the road 1, the width direction Y means the width direction Y of the road 1, the "inside" is the central side in the width direction Y of the road 1, and the "outside" is the width of the road 1. It means the end side in the direction Y. The stretching direction X and the width direction Y are horizontal directions orthogonal to each other, and are orthogonal to the vertical direction Z. The road of the present invention is not limited in structure and use, and can be widely applied to roads provided with decks and wall railings, such as bridges and highways.

FIG. 1 is a perspective view of a floor slab and a wall column, and FIG. 2 is a partially enlarged exploded view of FIG. Although not shown, more wall railings are arranged along the deck in the extension direction X on the actual road. FIG. 3A is a cross-sectional view of the floor slab and the wall column, FIG. 3B is a side view of the first and second anchoring bars 4 and 5 as viewed from the same direction as FIG. c) is an enlarged view of part A of FIG. 3 (a). 4 (a) is a front view seen from the direction B of FIG. 3 (a), FIG. 4 (b) is a cross-sectional view taken along the line CC of FIG. 3 (a), and FIG. 4 (c) is FIG. 3 (c). A cross-sectional view taken along the line DD of a), FIG. 4 (d) is an enlarged view of part A of FIG. 4 (b). FIG. 4A shows an internal anchoring streak and a slit 8 for convenience.

The floor slab 2 is a member constituting the road surface of the road 1. Although the floor slab 2 is made of precast, it may be constructed on site. A foundation portion 12 raised with respect to a general portion is formed at a portion of the floor slab 2 where the wall balustrade 3 is installed. The upper surface of the foundation portion 12 connects the first upper surface 13A located inside the road 1, the second upper surface 13B located outside the road 1, and the first upper surface 13A and the second upper surface 13B. It has a slope 14 of 1. The first upper surface 13A and the second upper surface 13B are generally horizontal, and the second upper surface 13B is higher than the first upper surface 13A. The first upper surface 13A has a plurality of first receiving holes 15 into which the first fixing muscle 4 is inserted, and the second upper surface 13B has a plurality of second receiving holes into which the second fixing muscle 5 is inserted. Each of the holes 16 is formed. The plurality of second receiving holes 16 are arranged on the outside of the plurality of first receiving holes 15 along the extending direction X. The plurality of first receiving holes 15 and the plurality of second receiving holes 16 are arranged at a substantially constant pitch along the extending direction X of the road 1. The first receiving hole 15 and the second receiving hole 16 are circular holes extending vertically inside the floor slab 2, and are terminated inside the floor slab 2. As an example, a spiral groove is formed in the inner walls of the first receiving hole 15 and the second receiving hole 16, and the adhesiveness of the mortar to be filled can be improved.

The wall balustrade 3 is made of precast, is manufactured in advance at a factory or the like, and is carried to the site. A first gap G1 is provided between the upper surface of the foundation portion 12 and the lower surface of the wall railing 3, and the first gap G1 is filled with a fourth mortar M4 made of non-shrink mortar. The first gap G1 during construction before the fourth mortar M4 is filled is set by a bolt or the like (not shown) protruding upward from the upper surface of the foundation portion 12 or downward from the lower surface of the wall railing column 3. be able to. The wall balustrade 3 has a first surface 9A facing the inside of the road 1 and a second surface 9B which is the back surface of the first surface 9A, and the first surface 9A has a downward width. It is wider (overhanging inside road 1 as it approaches floor slab 2). The bottom of the wall slope 3 connects a first lower surface 10A facing the first upper surface 13A, a second lower surface 10B facing the second upper surface 13B, and a first lower surface 10A and a second lower surface 10B. However, it has a first slope 14 and a second slope 11 that faces diagonally.

A plurality of first fixing bars 4, a plurality of second fixing bars 5, a plurality of third fixing bars 6, and a plurality of internal reinforcing bars 7 are provided inside the wall balustrade 3. The first to third fixing bars 4, 5 and 6 and the internal reinforcing bar 7 are made of rod-shaped glass fiber reinforced plastic (GFRP rod). GFRP is a resin reinforced with glass fiber, and has features such as light weight, high corrosion resistance, high strength, and high adhesion strength, as will be described later. These fixing bars 4 to 6 and the internal reinforcing bars 7, particularly the first fixing bar 4 and the second fixing bar 5, have spiral irregularities formed on their surfaces and have a rough surface. Therefore, as will be described later, by setting the compressive strengths of the first mortar M1 and the second mortar M2 to 80 N / mm ² or more, the adhesion strength of 18 ^{N / mm 2} is realized, and the fixing length is set to the fixing muscles 4 and 4. It is possible to make it about 15 times or less the diameter of 5. Further, the first fixing bar 4 and the second fixing bar 5 can have a simple shape mainly composed of straight lines.

As shown in FIG. 3B, the first anchoring bar 4 is connected to the upper portion 4A extending vertically along the second surface 9B and the upper portion 4A of the upper portion 4A. A central portion 4B extending downward from the second surface 9B toward the first surface 9A, and a lower portion 4C connected to the central portion 4B and extending vertically below the central portion 4B to the first receiving hole 15. And consists of. Bending of GFRP is difficult, and the strength decreases especially when bent at a large angle. Therefore, the first anchoring bar 4 is bent at a relatively small angle of about 20 to 40 degrees at two locations, the connection portion between the upper portion 4A and the central portion 4B and the connection portion between the central portion 4B and the lower portion 4C. Other than that, it is almost linear. The plurality of first anchoring muscles 4 are inserted into the plurality of first receiving holes 15, respectively, and are fixed to the deck 2 by the first mortar M1 filled in the first receiving holes 15. The first mortar M1 is composed of a non-shrink mortar.

The second anchoring bar 5 extends vertically along the second surface 9B to the second receiving hole 16. The plurality of second anchoring bars 5 are inserted into the plurality of second receiving holes 16, respectively, and are fixed to the deck 2 by the second mortar M2 filled in the second receiving holes 16. The second mortar M2 comprises a non-shrink mortar. The upper end of the second anchoring muscle 5 coincides with the upper end of the first anchoring muscle 4.

The central portion 4B extending in the oblique direction of the first fixing muscle 4 makes it possible to secure a distance L in the Y direction between the first fixing muscle 4 and the second fixing muscle 5 at the fixing portion. It is considered that the bending moment due to the collision load is generally generated in the clockwise direction in FIG. 3A centering on the fixing portion of the second fixing muscle 5. By securing the distance L (arm length) between the first fixing bar 4 and the second fixing bar 5 at the fixing portion, it becomes easy to resist the bending moment, and the bending fracture resistance of the wall railing column 3 is increased. Can be improved. In other words, the resistance to the collision load is enhanced by projecting the lower portion of the wall railing 3 inward and aligning the first fixing bar 4 along the projecting portion of the lower portion. It should be noted that since the first fixing bar 4 is not used as a tensioning material, it can be bent, and here, a GFRP rod that can be bent is selected.

A plurality of third anchoring bars 6 are provided for joining with the adjacent wall rails 3. In the following description, one wall height column 3 adjacent to each other in the stretching direction X is referred to as a first wall height column 3A, and the other wall height column 3 is referred to as a second wall height column 3B. The side surface of the first wall column 3A facing the second wall column 3B is referred to as the first side surface 17A, and the side surface of the second wall column 3B facing the first wall column 3A is referred to as the second side surface 17B. .. Four third anchoring bars 6 are arranged on the second side surface 17B of the second wall railing 3B. A part of the third anchoring bar 6 is embedded in the second wall railing column 3B, and the rest protrudes from the second side surface 17B in a direction perpendicular to the second side surface 17B. The third anchoring muscles 6 are arranged in a row in the vertical direction.

The first wall railing 3A has a slit 8 that receives the third anchoring bar 6. The slit 8 is open to the upper surface 18 and the first side surface 17A of the first wall railing 3A. The third anchoring bar 6 is inserted into the slit 8 and fixed to the first wall balustrade 3A by the third mortar M3 filled in the slit 8. Actually, the first wall railing column 3A and the second wall railing column 3B have the same configuration, and a slit 8 is formed on the opposite surface of the first side surface 17A of the first wall railing column 3A. A third anchoring muscle 6 is formed on the opposite surface of the second side surface 17B of the second wall railing 3B. That is, in the first and second wall height columns 3A and 3B, the third anchoring bar 6 is arranged on one side surface 17A or 17B in the stretching direction X, and the slit 8 is arranged on the other side surface 17B or 17A. The third anchoring muscle 6 is made of GFRP like the first and second anchoring muscles 4 and 5. The third mortar M3, like the first and second mortars M1 and M2, is made of non-shrink mortar.

The third anchoring bar 6 and the slit 8 are provided only in the upper half of the wall column 3 in order to avoid interference with the first anchoring bar 4 of the wall column 3 to be attached in advance. This is also effective in ensuring the horizontal bending strength and breaking strength of the joint when a collision load is applied to the joint between the adjacent wall railings 3. As an example, a GFRP rod equivalent to P60-18-D19 is used as the first and second anchoring muscles 4 and 5, and a GFRP rod equivalent to P60-23-D22 is used as the third anchoring muscle 6. ..

A second gap G2 of about 30 mm is provided between the first wall railing column 3A and the second wall railing column 3B in consideration of workability. The second gap G2 is formed between the first side surface 17A of the first wall railing 3A and the second side surface 17B of the second wall railing 3B. The second gap G2 is filled with a third mortar M3. A groove 20 extending in the vertical direction is formed on the first side surface 17A, and a ridge 19 extending in the vertical direction facing the groove 20 is formed on the second side surface 17B. The slit 8 extends horizontally from the bottom surface of the groove 20. As described above, since the third anchoring muscle 6 is made of GFRP, the tensile strength is high but the strength against shearing force is small. The ridge 19 and the groove 20 engage with each other via the third mortar M3 and function as a shear key that absorbs the shearing force when a collision load is applied. The ridge 19 and the groove 20 may be provided on either wall height column 3. That is, one of the first and second wall height columns 3B is provided with a ridge 19 and the other is provided with a groove 20 that engages with the ridge 19, and the slit 8 is opened in the ridge 19 or the groove 20. The slit 8 is preferably roughened, but the second gap G2 does not need to be roughened.

The plurality of internal reinforcing bars 7 are housed inside the wall balustrade 3. The internal reinforcing bars 7 are arranged in a grid pattern in the stretching direction and the vertical direction. The individual internal reinforcing bars 7 extend substantially linearly. Therefore, it is possible not only to prevent the strength from being lowered due to the bending process, but also to introduce prestress into the internal reinforcing bar 7. Since the shear strength of concrete is increased by introducing prestress, the resistance to punching shear failure can be improved. In addition, in order to improve the resistance to punching shear failure, short fiber reinforced concrete in which short fibers are mixed with concrete may be used.

As is clear from the above description, the joint surface between the wall railing column 3 and the floor slab 2 has a step having a first slope 14 and a second slope 11. The step absorbs the shearing force when a collision load is applied, and acts as a shearing key to protect the first fixing muscle 4. Since the GFRP rod has low strength against the shearing force, the shearing force applied to the GFRP rod can be reduced by the step bearing the shearing force. On the other hand, if the wall balustrade 3 is lifted from the floor slab 2 by the shearing force due to the collision load, the performance of the step to transmit the shearing force may deteriorate. Therefore, the first and second fixing muscles 4 and 5 are provided with high adhesion strength to suppress the lifting of the wall height column 3. With such a configuration, it is possible to secure the necessary resistance performance against the shearing force. In the present embodiment, the first slope 14 and the second slope 11 form an angle θ of 75 degrees with the horizontal plane. When the angle is small (for example, when it is 45 degrees, which is a general shear key angle), the effect as a shear key (shearing force of the key) is reduced. When the angle θ is large, the effect as a shear key is enhanced, but the filling property of the mortar is deteriorated. By setting the angle θ to about 75 degrees, it is possible to achieve both performance as a shear key and mortar filling property. The angle θ is not limited to 75 degrees and can be selected from the range of 60 to 80 degrees.

The first and second fixing muscles 4 and 5 have high adhesion strength as described above. Therefore, the fixing length can be significantly reduced as compared with a general reinforcing bar. Table 1 shows the adhesion strength of various types of anchoring muscles. Table 1 shows data based on the test results conducted by the applicant or data described in published literature. The reinforcing bars are painted with epoxy resin. This is because it is common to use epoxy resin-coated reinforcing bars that are resistant to salt damage in the wall balustrade 3. In addition, Table 1 also shows the reinforcing bars not coated with epoxy resin as a reference for comparison. With reference to Table 1, the adhesion strength of GFRP is less than 3 times that of the reinforcing bar (the actual adhesion strength may be higher than the value shown in the table because the base metal was broken first). It is considered that this is because the surface of GFRP is rougher than that of the reinforcing bar, and the biting of concrete is improved. Since the adhesive force is proportional to the adhesive strength and the fixing length, when the adhesive force equivalent to that of the reinforcing bar is obtained by GFRP, the fixing length may be about 1/3 of the reinforcing bar. However, in order to secure high adhesion strength, it is necessary to increase the strength of the mortar accordingly. If the strength of the non-shrink mortar combined with GFRP is 80 N / mm ² or more as a design value, at least the adhesion strength shown in the table can be secured.

GFRP has a tensile strength of 1000 MPa or more, which is about three times that of general reinforcing bars. In other words, GFRP has a high tensile strength commensurate with the high adhesive strength. Therefore, when securing the same fixing length as the reinforcing bar, it is possible to significantly reduce the number of the first and second fixing bars 4 and 5 as compared with the reinforcing bar. In addition, the high tensile strength also increases the strength of the joint.

By reducing the fixing lengths of the first and second fixing muscles 4 and 5, the influence on the floor slab 2 can be suppressed. As shown by the broken line in FIG. 3A, when the fixing length is long, the thickness of the deck 2 may be insufficient. In that case, it is necessary to add a floor slab 2 at the installation position of the wall balustrade 3, which affects the precast manufacturability and the workability at the site. The thickness of the floor slab 2 is usually about 25 to 30 cm, and it is difficult to keep the fixing length of the reinforcing bar within this range. When the arrangement density is restricted, it is also difficult to shorten the fixing length and increase the number of reinforcing bars. In the present embodiment, the additional floor slab 2 can be minimized, and in some cases, the additional floor slab can be eliminated.

From the above, it is the adhesion strength is 18N / mm ² or more, the strength of the first and second mortar M1, M2 is achieved sufficient effects of the present invention as long as 80 N / mm ² or more. Although GFRP is a preferable example that satisfies this condition, it should be noted that the first and second colonizing muscles 4 and 5 are not limited to GFRP.

Another advantage of GFRP is high corrosion resistance. The wall railing 3 using reinforcing bars is liable to corrode in an environment with a high salt concentration such as along the coast, and it may be difficult to maintain soundness for a long period of time. GFRP is a non-ferrous and non-metallic material and is not corroded by salt. Therefore, it is easy to extend the life and reduce the maintenance load as compared with the wall height column 3 using the reinforcing bar. Further, the reinforcing bar requires a certain reinforcing bar cover (for example, about 70 mm) to prevent corrosion, but GFRP does not need it. A minimal cover is required to ensure wraparound of the aggregate, but this is significantly smaller than a rebar cover to prevent corrosion. Therefore, the degree of freedom in arranging the first and second fixing muscles 4 and 5 is high. Since the required fog is small, it is possible to reduce the amount of concrete in the wall balustrade 3 if there are no restrictions on the outer shape. Furthermore, since GFRP is lightweight, workability during assembly is improved as compared with reinforcing bars.

Next, the construction method of the road 1 will be described with reference to FIG. First, as shown in FIG. 5A, a plurality of floor slabs 2 are attached. The first and second receiving holes 15 and 16 are formed in advance in the plurality of decks 2. The first and second receiving holes 15 and 16 are formed by setting a steel sheath before placing the concrete of the deck 2 and pulling out the steel sheath after placing the concrete. Since the outer surface of the steel sheath is provided with a spiral groove, the spiral groove is also formed on the inner walls of the first and second receiving holes 15 and 16. Next, the first receiving hole 15 is filled with the first mortar M1, and the second receiving hole 16 is filled with the second mortar M2. Next, as shown in FIG. 5B, the first and second anchoring bars 4 and 5 of the first wall height column 3A are inserted into the first and second receiving holes 15 and 16. The third anchoring bar 6 is inserted into the slit 8 of the previously attached wall rail 30. Similarly, the first and second anchoring bars 4 and 5 of the second wall railing column 3B are inserted into the first and second receiving holes 15 and 16. The third anchoring bar 6 is inserted into the slit 8 of the first wall railing column 3A. Although not shown, the other wall balustrade 3 is attached to the floor slab 2 in the same manner. Next, as shown in FIG. 5 (c), the mortar is filled through the slit 8 of the wall railing column 30 attached earlier. Plates (not shown) for confining mortar are installed in advance on the first surface 9A and the second surface 9B of the wall column 3. The mortar is filled in the slit 8, the second gap G2 between the previously attached wall rail 30 and the first wall rail 3A, and further the first between the first wall rail 3A and the deck 2. The gap G1 is filled. If there is a fillable space, the mortar is also filled in the first and second receiving holes 15 and 16. When the slit 8 of the wall railing column 30 is filled with mortar, the filling port of the mortar is switched to the slit 8 between the first wall railing column 3A and the second wall railing column 3B, and the same process is repeated.

In the wall balustrade disclosed in Patent Document 1, since the fixing tool (nut) is screwed to the tip of the reinforcing bar, the distance between the receiving hole and the reinforcing bar is small, and the workability when inserting the reinforcing bar into the receiving hole is improved. descend. In the present embodiment, such a fixing tool is unnecessary, and the joining structure between the wall railing column 3A and the floor slab 2 is simplified. Therefore, the first and second receiving holes 15, 16 and the first and first It is easy to secure a gap between the fixing bars 4 and 5 of No. 2, and workability is improved.

FIG. 6 is a diagram similar to FIG. 3A showing another embodiment of the present invention. A ground cover 21 is provided between the wall balustrade 3 and the floor slab 2. The ground cover 21 is made of precast and is joined to the deck 2 by a reinforcing bar 22 for joining. The ground cover 21 is integrated with the floor slab 2 and carried to the site, but it may be integrated at the site. The upper surface of the ground cover 21 is provided with a step 12 similar to that of the above-described embodiment, and the wall balustrade 3 is attached in the same manner. According to this embodiment, when the floor slab 2 is thin, it is easy to secure the depths of the first and second receiving holes 15 and 16. In the present embodiment, the first anchoring muscle 104 is composed of an upper portion 104A and a lower portion 104B. The upper portion 104A extends along the first surface 9A of the wall railing column 3, but is inclined with respect to the vertical direction Z, so that the first fixing bar 104 and the second fixing bar 5 are formed at the fixing portion. It is possible to secure a space between them in the Y direction. Further, as described above, since the first fixing bar 104 may have a small fog, it can be arranged close to the first surface 9A. This also makes it possible to secure the interval in the Y direction.

1 Road 2 Deck 3 Wall balustrade 4 1st anchorage 4A Upper part 4B Central part 4C Lower part 5 2nd anchorage 6 3rd anchorage 8 Slits 9A-9B 1st to 2nd surface 12 Foundation 15 1st receiving hole 16 2nd receiving hole 17A to 17B 1st and 2nd side surfaces 18 Upper surface of wall balustrade 19 Convex 20 Groove M1 to M3 1st to 3rd mortar X Road extension direction

Claims (7)

A road having a deck and a precast wall balustrade attached to the deck.
The deck includes a plurality of first receiving holes arranged along the extending direction of the road and a plurality of second receiving holes arranged outside the plurality of first receiving holes along the extending direction. Have,
The precast wall balustrade includes a plurality of first anchoring bars inserted into the plurality of first receiving holes, and a plurality of second fixing bars inserted into the plurality of second receiving holes, respectively. Have,
The first fixing bar is fixed to the deck with the first mortar filled in the first receiving hole, and the second fixing bar is the second mortar filled in the second receiving hole. in is fixed to the floor plate, the first and second fixing muscle is non-metallic, strength of the first and second mortar is at 80 N / mm ² or more, adhesion strength of 18N / mm ² or more The road that is. The road according to claim 1, wherein the first and second anchoring bars are made of glass fiber reinforced plastic. The wall balustrade has a first surface facing the inside of the road and a second surface that is the back surface of the first surface, and the first surface is inside the road as it approaches the deck. Overhanging on
The first anchoring bar is connected to an upper portion extending vertically along the second surface and the upper portion of the upper portion of the wall balustrade, and the lower portion of the upper portion is connected to the upper portion from the second surface. It consists of a central portion that extends diagonally toward the first surface and a lower portion that is connected to the central portion and extends vertically below the central portion to the first receiving hole.
The road according to claim 1 or 2, wherein the second anchoring bar extends vertically along the second surface to the second receiving hole. The joint surface between the precast wall balustrade and the floor slab has a step with a slope, and the slope forms an angle of 60 to 80 degrees with the horizontal plane, according to any one of claims 1 to 3. The listed road. It has first and second first precast wall railings provided adjacent to each other in the stretching direction.
The first precast wall balustrade has a first side surface facing the second precast wall balustrade, an upper surface, and slits opening in the first side surface and the upper surface.
The second precast wall balustrade has a second side surface facing the first precast wall balustrade and a third anchoring bar protruding from the second side surface and housed in the slit.
The third anchoring bar is fixed to the first precast wall balustrade with a third mortar filled in the slit, and the third anchoring bar is made of glass fiber reinforced plastic, according to claims 1 to 4. The road described in any one of the above. 5. Claim 5 that one of the first side surface and the second side surface has a ridge, and the other has a groove that engages with the ridge, and the slit is open in the ridge or the groove. The road described in. It is a construction method of a road having a floor slab and a precast wall balustrade attached to the floor slab.
The plurality of first receiving holes arranged along the extending direction of the road of the deck are filled with the first mortar, and the outside of the plurality of first receiving holes of the deck is oriented in the extending direction. Filling the plurality of second receiving holes arranged along with the second mortar and
The plurality of first anchoring bars and the plurality of second anchoring bars of the precast wall railing column were filled with the plurality of first receiving holes filled with the first mortar and the second mortar. Each of the plurality of second receiving holes is inserted, and the precast wall balustrade is fixed to the floor slab.
The intensity of the first and second mortar is at 80 N / mm ² or more, the first and adhesion strength of the second fixing muscle is 18N / mm ² or more, construction method of the road.

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