JP7387122B2 - Cast-in-place concrete pile reinforcement net and cast-in-place concrete pile - Google Patents

Description

The present invention relates to a cast-in-place concrete pile reinforcing net and a cast-in-place concrete pile in which a reinforcing bar cage equipped with the reinforcing net is arranged, and in particular, to prevent the reinforcing net from breaking due to impact, lateral pressure, etc. during concrete pouring. This makes it possible to easily form cast-in-place concrete piles with uniform cross sections.

Generally speaking, cast-in-place concrete piles are produced at construction sites by machine or manual excavation of the ground to a predetermined diameter and predetermined depth to form a vertical hole, into which a cylindrical reinforcing bar cage is erected. It is formed by pouring.

By the way, at construction sites with extremely soft ground such as reclaimed land, the walls of the hole may collapse during excavation or concrete pouring, or the concrete may flow toward the hole wall during concrete pouring, causing the pile body to collapse. There were cases where the holes bulged out to the sides, or the concrete dragged in earth and sand as the hole walls collapsed.

Therefore, at construction sites on soft ground such as reclaimed land, by placing a permeable net around the outer circumference of the reinforcing bar cage, it is possible to prevent the collapse of the hole wall during concrete pouring and the damage caused by the lateral flow of concrete. Prepared for lateral bulge, etc.

By the way, this type of water-permeable net is made of chemical fiber resin such as polyethylene, and is usually arranged in plural numbers around the outer circumference of the reinforcing bar cage in the circumferential direction and/or axial direction depending on the diameter and/or length of the reinforcing bar cage. In addition, the ends of the water permeable nets that are adjacent to each other in the circumferential direction and/or the axial direction of the reinforcing bar cage are sewn together with sewing thread to form a cylindrical shape.

For example, in Patent Document 1, a plurality of spacers that bulge outward of the reinforcing bar cage are attached to the outside of the vertical reinforcing bars of a reinforcing bar cage assembled in a cylindrical shape, and a plurality of spacers are attached to the outside of the spacers along the circumferential direction of the reinforcing bar cage. Disclosed is an invention of a reinforcing bar cage for constructing cast-in-place concrete piles, which is constructed by attaching a net attachment ring to the net attachment ring and attaching a water-permeable net to the outside of the net attachment ring.

Japanese Patent Application Publication No. 2007-2550 Patent No. 3963921 Japanese Patent Application Publication No. 2006-241919 Japanese Patent Application Publication No. 2005-264522

However, since the aforementioned reinforcing net is made of thin fibers made of chemical fiber resin such as polyethylene, it naturally has a limit in its strength to restrain impact and lateral pressure during concrete pouring. Part of the concrete cast inside the net bulged out to the side, making it impossible to form concrete piles with a uniform cross section.

In addition, there was also a risk that the connection between the ends of the permeable net would break due to impact or lateral pressure during concrete placement, and the concrete inside the net would flow into the pile hole.

The present invention has been made to solve the above-mentioned problems, and it is possible to prevent the fracture of the connection between the ends of the permeable net due to impact or lateral pressure during concrete pouring, and to improve the quality of cast-in-place concrete piles with uniform cross sections. The purpose of the present invention is to provide a cast-in-place concrete pile reinforcing net that can be reliably constructed, and a cast-in-place concrete pile using the reinforcing net.

The present invention is an invention of a reinforcing net attached to a reinforcing bar cage arranged on a cast-in-place concrete pile, which includes a water-permeable net that covers the outer periphery of the reinforcing bar cage, and a plurality of reinforcing ribs formed on the water-permeable net. The reinforcing ribs are arranged continuously in the circumferential direction and/or axial direction of the reinforcing bar cage on the outside and/or inside of the water permeable net, and are arranged continuously in the circumferential direction and/or axial direction of the reinforcing bar cage by sewing threads It is characterized by being equipped with reinforcing tape sewn in the axial direction, and the simplest structure prevents the water permeable net from breaking or bulging due to impact or lateral pressure during concrete pouring. Cast-in-place concrete piles with uniform cross sections can be easily formed.

The reinforcing tape may be sewn on the outside or inside of the water-permeable net, or on both sides of the water-permeable net so as to sandwich the water-permeable net. Furthermore, the thickness of the reinforcing ribs can be adjusted by sewing a plurality of reinforcing tapes together. The width of the reinforcing ribs is not particularly limited, but may be about 3 to 5 cm depending on the pile diameter.

A water-permeable chemical fiber (polyester) mesh cloth can be used for the water-permeable net, and the material of the reinforcing tape is not particularly limited, but it may be a nylon tape or the like, which has at least a higher tensile strength than the water-permeable net. It is desirable to use a tape made of

Furthermore, the sewing thread should have at least a higher tensile strength than the water-permeable net, such as vinylon sewing thread (about #8 (about 3.3 mm in diameter)) or polyester sewing thread (about #5 (about 4.5 mm in diameter)). etc. are suitable.

The reinforcing rib is formed from pleats (pleats) formed by folding a part of the water-permeable net in the circumferential direction or axial direction of the reinforcing bar cage, and a reinforcing tape attached on the pleat. You can also.

In this case, the thickness of the reinforcing rib can be freely adjusted as necessary by forming the pleats by alternately folding them two or three times in the circumferential or axial direction of the reinforcing bar cage. The reinforcing tape may be folded into a U-shape along the cross-sectional shape of the pleats, and sewn together with the pleats onto the water-permeable net using a sewing thread.

In addition, a plurality of reinforcing ribs can be formed continuously in the axial or circumferential direction of the reinforcing bar cage and spaced apart in the circumferential or axial direction of the reinforcing bar cage, and the pitch of the reinforcing ribs does not necessarily have to be equal. You can set it freely.

Furthermore, a reinforcing tape can be attached to the connection portion between the ends of the water-permeable net to reinforce the connection portion between the ends of the water-permeable net. In this case, the ends of the water permeable net are overlapped with each other in the circumferential direction or the axial direction of the reinforcing bar cage, and the reinforcing tape is placed in a U-shape along the cross-sectional shape of the connection between the ends of the water permeable net. It suffices if the water permeable net is folded in and sewn to the connecting portion between the ends of the water permeable net using sewing thread.

In addition, the reinforcing tape is folded in the circumferential direction or axial direction of the reinforcing bar cage together with the connecting portion between the ends of the water permeable net, and is sewn onto the water permeable net with a sewing thread. Reinforcing ribs can be formed at the joints between the sections, and when the reinforcing cage is inserted into the pile hole, the connection between the ends of the permeable net will not become an obstacle. The construction work can be carried out smoothly.

In addition, by forming the connections between the ends of the permeable net by alternately folding them two to three times in the circumferential direction or axial direction of the reinforcing bar cage, the thickness of the reinforcing ribs at the connection portions can be adjusted as necessary. Can be adjusted freely.

The present invention is an invention of a reinforcing net that is attached to a reinforcing bar cage arranged on a cast-in-place concrete pile, and includes a water permeable net that covers the outer periphery of the reinforcing bar cage, and a plurality of reinforcing tapes formed on the water permeable net. The reinforcing tape is continuously arranged in the circumferential direction and/or axial direction of the reinforcing bar cage on the outside and/or inside of the water permeable net, and By being sewn in the axial direction, the extremely simple structure prevents the permeable net from breaking or bulging due to impact or lateral pressure during concrete placement, making it easy to form cast-in-place concrete piles with a uniform cross section. can do.

This is an embodiment of the present invention, and is a cast-in-place concrete pile constructed by arranging a reinforcing cage with a reinforcing net arranged around the outer periphery. c) is a front view. The cast-in-place concrete shown in FIG. 1 is shown in FIG. 1, in which FIG. 1(a) is a partially enlarged view of FIG. 1(a), and FIG. The connection between the ends of the permeable net is arranged so that the connection between the ends of the permeable net is continuous in the axial direction of the reinforcing bar cage. A cross-sectional view before being folded in the circumferential direction, and Figures (b) and (c) are cross-sectional views of a modified example of the connecting portion between the ends of the water-permeable net. The connection between the ends of the permeable net is arranged so that the connection between the ends of the permeable net is continuous in the circumferential direction of the reinforcing bar cage. Figure (b) is a cross-sectional view of the reinforcing bar cage before it is folded in the axial direction. The cast-in-place concrete shown in Fig. 1(a) is a partially enlarged view of Fig. 1(a), Fig. 5(b) is an enlarged view of the bottom part of Fig. 5(a), and Fig. 5(c) is a partially enlarged view of Fig. 1(a). ) shows the folds before being folded. The connection between the ends of the permeable net is arranged so that the connection between the ends of the permeable net is continuous in the circumferential direction of the reinforcing bar cage. Figure (b) is a cross-sectional view of the reinforcing bar cage before it is folded in the axial direction. The connection between the ends of the permeable net is arranged so that the connection between the ends of the permeable net is continuous in the axial direction of the reinforcing bar cage. A cross-sectional view before being folded in the circumferential direction, and Figures (b) and (c) are cross-sectional views of a modified example of the connecting portion between the ends of the water-permeable net. The cast-in-place concrete pile shown in FIG. 1 is shown in FIG. 1, in which FIG. 1A is a plan view and FIG. 1B is a front view. This figure illustrates another embodiment of the present invention, which is a cast-in-place concrete pile constructed by doubly arranging a permeable net around the outer periphery of a reinforcing bar cage. The top view, FIGS. 9(b) and 9(c) are enlarged views of the C part and the D part in FIG. 9(a), respectively.

1 to 7 illustrate an embodiment of the present invention, in which a cast-in-place concrete pile is formed by arranging a reinforcing net around the outer periphery of a reinforcing bar cage and pouring concrete into it. There is.

The cast-in-place concrete pile 1 is integrally formed from a reinforcing bar cage 2, a reinforcing net 3 placed around the outer periphery of the reinforcing bar cage 2, and concrete 4 cast within the reinforcing net 3.

The reinforcing bar cage 2 has a cylindrical shape made up of a plurality of longitudinal reinforcing bars 5 arranged at equal intervals in a circular shape with a predetermined diameter in plan view, and a plurality of hoop reinforcing bars 6 arranged around the outer periphery of the plurality of longitudinal reinforcing bars 5. It is configured. The hoop reinforcements 6 are arranged at predetermined intervals in the axial direction (longitudinal direction) of the vertical reinforcing bars 5.

A plurality of first spacers 7 are spaced at predetermined intervals in the axial direction (longitudinal direction) of the reinforcing bar cage 2 at every other or every other longitudinal reinforcing bars 5 among the plurality of longitudinal reinforcing bars 5 that are adjacent to each other in a circular shape in a plan view. and are attached adjacent to each other in a circular shape in plan view in the circumferential direction.

Further, second spacers 8 are spaced apart in a ring shape in the circumferential direction of the reinforcing bar cage 2 and at predetermined intervals in the axial direction of the reinforcing bar cage 2 between the plurality of first spacers 7, 7 that are adjacent to each other in a circular shape in a plan view. installed.

The first spacer 7 is formed integrally with a pair of welded portions 7a, 7a extending in the axial direction of the vertical reinforcing bar 5, and between the welded portions 7a, 7a, and is arranged outwardly of the reinforcing bar cage 2 in a substantially rectangular shape when viewed from the side. It is formed into a substantially hat shape in side view from the overhanging portion 7b formed to overhang the shape (see FIG. 4).

Further, the first and second spacers 7 and 8 are formed by a method such as bending a single long plate (steel band) or reinforcing steel, and in particular, the first and second spacers 7 and 8 shown in the figure are Each is formed by bending a long plate. Further, the first spacer 7 is attached by binding or welding the welded portions 7a, 7a to the vertical reinforcing bars 5 with a binding wire, and the second spacer 8 is attached to the overhanging portion 7b of the first spacers 7, 7 by binding or welding with a binding wire. It is attached by etc.

The reinforcing net 3 is arranged on the outer periphery of the reinforcing bar cage 2 so as to cover the entire circumference of the reinforcing bar cage 2, and is spaced between the reinforcing net 3 and the reinforcing bar cage 2 by a first spacer 7 and a second spacer 8. , the covering thickness w of the concrete 4 to the reinforcing bar cage 2 is ensured (see Figures 2(a) and 4(a)).

Further, the reinforcing net 3 includes a water-permeable net 9 that covers the entire outer periphery of the reinforcing bar cage 2 and a plurality of reinforcing tapes 10 or 11 that reinforce the water-permeable net 9.

The reinforcing tapes 10 and 11 are tapes made of a reticulated net or fabric (cloth) that is similar to tent fabric and has at least a higher tensile strength than the water-permeable net 9.

Of the water-permeable net 9, as shown in FIG. 1(b), the ends 9a of the water-permeable net 9 are arranged so that the connection part a between them is continuous in the axial direction of the reinforcing bar cage 2. The ends 9a, 9a of the water-permeable net 9 are overlapped by a predetermined length in the circumferential direction of the reinforcing bar cage 2 (see FIG. 3(a)).

Further, as shown in FIG. 1(c), the water permeable nets 9, 9 are arranged so that the ends 9a, 9a of the water permeable net 9 are continuous in the circumferential direction of the reinforcing bar cage 2. The end portions 9b, 9b are overlapped with each other by a predetermined length in the axial direction of the reinforcing bar cage 2 (see FIG. 4(a)).

Further, a reinforcing tape 10 is attached to the connection part a between the ends 9a, 9a of the water permeable net 9 (see FIG. 3(a)), and the connection between the ends 9b, 9b of the water permeable nets 9, 9 is attached. A reinforcing tape 11 is attached to part b (see FIG. 4(a)).

Furthermore, the connecting portion a between the ends 9a, 9a of the water-permeable net 9 is folded in one direction in the circumferential direction of the reinforcing bar cage 2, and is tightly attached to the water-permeable net 9 together with the reinforcing tape 10. (See Figure 2(b)).

In addition, in the figure, a gap is provided at the connection part a so that the overlap between the ends 9a, 9a of the water-permeable net 9 and the reinforcing tape 10 can be understood. The same is true.

Furthermore, the ends 9b of the water-permeable nets 9, 9, and the connection part b between them are folded in one direction in the axial direction of the reinforcing bar cage 2, and are tightly attached to the water-permeable net 9 together with the reinforcing tape 11. (See Figure 4(b)).

The reinforcing tape 10 is folded along the cross-sectional shape of the connection part a between the ends 9a, 9a of the water-permeable nets 9 which are superimposed on each other, so as to sandwich the connection part a, so that the reinforcing tape 10 is folded in the axial direction of the reinforcing bar cage 2. It is formed in a substantially U-shaped cross section that is continuous with (see FIGS. 2(a) and 2(b)).

The reinforcing tape 11 is folded along the cross-sectional shape of the connection part b between the ends 9b of the water-permeable nets 9, 9 which are superimposed on each other, so as to sandwich the connection part b, thereby reinforcing the reinforcing bar cage 2. It is formed in a substantially U-shaped cross section that continues in the circumferential direction (see FIGS. 4(a) and 4(b)).

Further, the reinforcing tape 10 is sewn continuously in multiple rows in the axial direction of the reinforcing bar cage 2 with sewing thread 12 to the connection part a of the ends 9a, 9a of the water-permeable net 9, and the reinforcing tape 11 is water-permeable. A plurality of rows are successively sewn in the circumferential direction of the reinforcing bar cage 2 to the connecting portion b of the ends 9b and 9b of the net 9 using sewing thread 12 (see FIGS. 4(a) and 4(b)).

Furthermore, the reinforcing tapes 10 and 11 are integrally sewn onto the water-permeable net 9 with the sewing thread 12 along with the ends 9a, 9a of the water-permeable net 9, and the ends 9b, 9b of the water-permeable net 9, respectively. You can leave it there.

The sewing thread 12 is at least a sewing thread having a tensile strength greater than that of the water-permeable net 9, such as vinylon thread (about #8) or polyester thread (about #5).

In this way, the ends 9a, 9a and 9b, 9b of the water-permeable net 9 are respectively joined by the above-described structure, and the connecting parts a, 9b, 9b are connected to each other, and By attaching the reinforcing tapes 10 and 11 to b, respectively, the connection parts a and b between the ends 9a, 9a and 9b, 9b of the water permeable net 9 are prevented from breaking due to impact or lateral pressure during concrete pouring. can be prevented.

In addition, the connection parts a and b between the ends 9a, 9a and 9b, 9b of the water-permeable net 9 that are joined to each other are sewn in close contact with the water-permeable net 9, so that the water-permeable Since the ends 9a and 9b of the reinforcing net 9 do not protrude for a long time from the surface of the reinforcing net 3, it becomes easy to erect the reinforcing bar cage 2 into the pile hole.

Further, the connection parts a and b between the ends 9a, 9a and 9b, 9b of the water permeable net 9 are integrally sewn onto the water permeable net 9 with a sewing thread 12 together with reinforcing tapes 10 and 11, respectively. By doing so, not only the connecting parts a and b between the ends of the water permeable net 9 are reinforced, but also the connecting parts a and b between the ends of the water permeable net 9 are reinforced, and the parts formed from the ends 9a, 9a, 9b and 9b of the water permeable net 9 and the reinforcing tapes 10 and 11 are respectively reinforced. The reinforcing ribs 16 and 17 can reinforce the entire reinforcing net 3.

Note that even if the connecting portion a between the ends 9a and 9a of the water-permeable net 9 is folded double or triple alternately in both circumferential directions of the reinforcing bar cage 2, and the reinforcing tape 10 is attached thereon, Good (see Figure 3(b)).

Similarly, the ends 9b of the water-permeable net 9, and the connection part b between them are alternately folded double or triple in both axial directions of the reinforcing bar cage 2, and the reinforcing tape 11 is attached thereon. Good (figure omitted).

FIG. 3(c) shows a modification of the connection between the ends of the water-permeable net 9, in which one or more reinforcing tapes 13 are interposed between the ends 9a, 9a of the water-permeable net 9. At the same time, a reinforcing tape 10 is attached to the outside of the ends 9a, 9a of the water-permeable net, and the ends 9a, 9a of the water-permeable net, the reinforcing plate 13, and the reinforcing plate 10 are integrated with the sewing thread 12 in the axial direction of the reinforcing bar cage 2. By sewing the ends 9a of the water-permeable net 9 together, the strength of the connection part a between the ends 9a, 9a can be increased.

Similarly, one or more reinforcing tapes 13 are interposed between the ends 9b, 9b of the water-permeable nets 9, and reinforcing tapes 11 are attached to the outside of the ends 9b, 9b of the water-permeable nets, and the water-permeable By sewing together the end portions 9b, 9b of the steel net, the reinforcing tape 13, and the reinforcing tape 11 in the circumferential direction of the reinforcing bar cage 2 with the sewing thread 12 (not shown), a water permeable net adjacent to the reinforcing bar cage 2 in the axial direction is formed. The strength of the connecting portion b between the ends 9b and 9b can be increased.

In addition, the permeable net 9, which is arranged so that the connecting portion a between the ends 9a and 9a of the permeable net 9 is continuous in the axial direction of the reinforcing bar cage 2, has folds that are continuous in the axial direction of the reinforcing bar cage 2. Pleats 14 are formed (see FIGS. 5(a), (b), and (c)).

In addition, the connection part b between the ends 9b, 9b of the water permeable net 9 is continuous in the circumferential direction of the reinforcing bar cage 2 with the water permeable nets 9, 9 arranged so as to be continuous in the circumferential direction of the reinforcing bar cage 2. Folds (pleats) 15 are formed (see FIG. 1(c), FIGS. 6(a) and (b)).

The pleats 14 are formed at predetermined intervals in the circumferential direction of the reinforcing bar cage 2 (see FIG. 5(a)), and the pleats 14 are formed at predetermined intervals in the axial direction of the reinforcing bar cage 2. (See Figure 5(a)).

The pleats 14 are formed by folding a part of the water-permeable net 9 in the circumferential direction of the reinforcing bar cage 2 by a predetermined length and overlapping each other (FIGS. 5(b) and (c)). A part of the net 9 is formed by folding and overlapping a predetermined length in the axial direction of the reinforcing bar cage 2 (see FIGS. 6(a) and 6(b)). A reinforcing tape 10 is attached to each pleat 14, and a reinforcing tape 11 is attached to each pleat 15.

Further, the pleat portion 14 is folded into one side of the reinforcing bar cage 2 in the circumferential direction, and attached to the water permeable net 9 so as to be in close contact with the reinforcing tape 10 (see FIG. 5(b)).

With this configuration, a plurality of reinforcing ribs 16 made of pleats 14 and reinforcing tape 10 are arranged on the permeable net 9 at predetermined intervals in the circumferential direction of the reinforcing bar cage 2 and continuous in the axial direction of the reinforcing bar cage 2. (See Figure 1(a)).

Further, the pleat portion 15 is folded into one side of the reinforcing bar cage 2 in the axial direction, and is attached to the water-permeable net 9 together with the reinforcing tape 11 so as to be in close contact with the reinforcing tape 11 (see FIG. 1(b)). Further, the pleats 15 are sewn together with the reinforcing tape 11 onto the water-permeable net 9 using sewing threads 12 in a plurality of consecutive rows in the circumferential direction of the reinforcing bar cage 2.

With this configuration, a plurality of reinforcing ribs 17 made of pleats 15 and reinforcing tape 11 are continuous in the circumferential direction of the reinforcing bar cage 2 on the water permeable net 9, and are spaced apart at predetermined intervals in the axial direction of the reinforcing bar cage 2. (See Figure 1(c)).

FIGS. 7(a) and 7(b) illustrate an example in which the reinforcing tape 13 is attached to one side of the pleat part 14 by sewing it with the sewing thread 12, and the reinforcing rib 16 is simply attached to the water-permeable net 9. In addition, the water permeable net 9 itself can be reinforced throughout.

The pleats 14 are folded alternately in both circumferential directions of the reinforcing bar cage 2, and the pleats 15 are folded in double or triple folds in both axial directions of the reinforcing bar cage 2. and 11 may be attached respectively (see FIG. 7(c)).

FIGS. 8(a) and 8(b) illustrate another embodiment of the present invention, in which reinforcing tapes 10 and 11 are placed on the outside and/or inside of the permeable net 9, respectively, of the reinforcing bar cage 2. The water permeable net 9 is arranged continuously in the circumferential direction and the axial direction, and is sewn to the water permeable net 9 in the circumferential direction and the axial direction of the reinforcing bar cage 2 with sewing thread. It can be reinforced with the simplest configuration.

In this case, by attaching the reinforcing tape 10, reinforcing ribs 16 that are continuous in the longitudinal direction of the reinforcing bar cage 2 are formed, and by attaching the reinforcing tape 11, reinforcing ribs 17 that are continuous in the circumferential direction of the reinforcing bar cage 2 are formed. It is formed.

FIGS. 9(a) to 9(c) illustrate a reinforcing net 3 constructed by doubly arranging water-permeable nets 9 around the outer periphery of the reinforcing bar cage 2. The connections between the ends 9a and 9a and between the ends 9b and 9b of each of the water permeable nets adjacent in the circumferential and axial directions are as described in FIGS. 1 to 7, except that the water permeable nets are arranged in a double manner. This is almost the same as the embodiment described above.

Furthermore, the pleats 14 and 15 that are continuously formed in the permeable net 9 in the circumferential and axial directions of the reinforcing bar cage 2 are also the same as those explained in FIGS. 1 to 7, except that the permeable net is doubled. The configuration is almost the same as the embodiment.

Note that a tensile test was conducted on the connection portion (seam portion) of the water-permeable net in the reinforcing net according to the embodiment of the present invention under the following specifications.

(1) A net-like fabric made of water-permeable chemical fiber (polyester fiber) was used as the fabric for the test piece (water-permeable net), nylon tape was used as the reinforcing tape, and polyester #5 was used as the sewing thread. (polyester fiber) and has a higher tensile strength than net fabric.

(2) The fabrics of the test pieces were single and double (double), and four types of combinations were prepared, with and without reinforcement with reinforcing tape.

(3) The test method (JIS 1093 A-1 method) was to grasp both ends of the fabric of the test piece using a testing machine and pull it, and the tensile test was terminated when the sewing thread at the connection part or the fabric of the test piece broke.

(4) As a result of the tensile test, the strength (N) of the joint (seam) in the single case without reinforcing tape and with reinforcing tape was 487 N and 500 N, respectively.

In addition, the strength (N) of the joint (seam) in the case of double (double) without reinforcing tape and with reinforcing tape was 943 N and 1050 N, respectively.

As a result of the tensile test, it was confirmed that the strength of the joints (seams) with reinforcing tape was about 20% greater than without reinforcing tape in both single and double fabrics.

The present invention enables easy construction of cast-in-place concrete piles with a uniform cross section by preventing breakage of the permeable net due to impact, lateral pressure, etc. during concrete placement.

1 Cast-in-place concrete pile 2 Reinforcement cage 3 Reinforcement net 4 Cast-in-place concrete 5 Vertical reinforcing bar 6 Hoop reinforcement 7 First spacer 7a Welded part 7b Overhanging part 8 Second spacer 9 Water permeable net 9a End part 9b of water permeable net Water permeability Net edge 10 Reinforcement tape 11 Reinforcement tape 12 Sewing thread 13 Reinforcement tape 14 Folds (pleats)
15 Folds (pleats)
16 Reinforcement rib 17 Reinforcement rib a Connection portion between the ends of the water-permeable net b Connection portion between the ends of the water-permeable net

Claims (5)

A reinforcing net attached to a reinforcing bar cage arranged on a cast-in-place concrete pile, comprising a water-permeable net that covers the outer periphery of the reinforcing bar cage and a plurality of reinforcing ribs formed on the water-permeable net, The rib is formed from a pleat portion and a reinforcing tape attached to the pleat portion, the pleat portion is formed by folding a part of the water permeable net in the circumferential direction or the axial direction of the reinforcing bar cage, A reinforcing net for cast-in-place concrete piles, characterized in that the reinforcing tape is folded into a U-shape along the cross-sectional shape of the pleats, and is sewn together with the pleats to the water-permeable net with sewing thread. 2. The reinforcing net for cast-in-place concrete piles according to claim 1 , wherein a reinforcing tape is attached to the connection between the ends of the water-permeable net, and the connection between the ends of the water-permeable net is connected to the periphery of the reinforcing bar cage. The reinforcing tape is folded into a U shape along the cross-sectional shape of the connection between the ends of the water-permeable net, and the reinforcing tape is folded into a U-shape along the cross-sectional shape of the connection between the ends of the water-permeable net. A reinforcing net for cast-in-place concrete piles, which is sewn with sewing thread. 3. The cast-in-place concrete pile reinforcing net according to claim 2, wherein the reinforcing tape is sewn to the water-permeable net together with a connecting portion between the ends of the water-permeable net using sewing thread. Net for reinforcing concrete piles. 4. The reinforcement net for cast-in-place concrete piles according to claim 2 or 3, wherein the reinforcing tape is formed continuously in the circumferential direction or axial direction of the reinforcing bar cage. Net for use. A cast-in-place concrete pile comprising concrete, a reinforcing bar cage arranged in the concrete, and a reinforcing net placed around the outer periphery of the reinforcing bar cage, the reinforcing net being a water-permeable concrete pile that covers the outer periphery of the reinforcing bar cage. and a plurality of reinforcing ribs formed on the water-permeable net, the reinforcing ribs are formed from pleats and reinforcing tape attached to the pleats, and the pleats are attached to the water-permeable net. The reinforcing tape is formed by being folded in the circumferential or axial direction of the reinforcing bar cage, and the reinforcing tape is folded into a U-shape along the cross-sectional shape of the pleats, and the reinforcing tape is folded into the water-permeable net together with the pleats. A cast-in-place concrete pile characterized by being sewn with sewing thread.

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