JP3282808B2 - Precast PC soundproofing wall having curved surface and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof wall made of precast and prestressed concrete having a curved surface which is installed along both sides of a road, a railroad or the like, and protects the residents from the noise from a car noise, a train noise and the like. And its manufacturing method.

[0002]

2. Description of the Related Art Conventionally, generally, a precast concrete soundproof wall is made of reinforced concrete (made of RC) and is a simple form of precast reinforced concrete soundproof wall which does not provide prestress or pretension. If the side (tip) is a sound-insulating wall made of reinforced concrete (hereinafter referred to as RC) having no prestress or pre-tension even if it has a curved structure curved in an arc shape, manufacture of the sound-insulating wall The method was relatively easy.

However, in the case of a reinforced concrete precast soundproof wall, the thickness of the soundproof wall must be increased in order to have a structure that can withstand the stress caused by wind load. In addition, the soundproof wall becomes larger and the weight of the soundproof wall increases,
There has been a problem that erection is time-consuming and expensive.

Therefore, instead of the conventional RC noise barrier,
As a lightweight soundproof wall that has a large load-bearing capacity against wind loads and the like, it is made of precast steel using PC steel to make a soundproof wall made of prestressed concrete with a prestress applied to the soundproof concrete body (hereinafter referred to as PC).
Made of prestressed concrete (hereinafter precast PC
Soundproof wall), but has the following problems.

[0005]

When manufacturing a soundproof wall made of precast PC, a problem is how to introduce prestress. It is well known that there are a post-tension method and a pre-tension method as a method of introducing prestress. When the post-tension system is applied to a soundproof wall, there are the following problems. The thickness of the sound-insulating wall is determined by the necessity of filling the grout material into the space around the PC steel material embedded in the sound-insulating wall and the shape of the fixing tool for fixing the end of the PC steel material to the sound-insulating wall. Because the thickness of the member becomes large, and the height of the pre-cast PC soundproof wall is as low as 2 m to 3 m,
In the post-tension method, the influence of the set loss when fixing the end fixing device of the PC steel material is large (the compressive force may not be sufficiently introduced into the soundproof wall).
It has been found that the introduction of prestress into a soundproof wall made of precast PC is inappropriate.

Accordingly, it is conceivable that the pretensioning method is used. However, even in the case of the pretensioning method, particularly when manufacturing a precast PC soundproof wall having a curved surface, the following problems must be overcome. For example, it is impossible to manufacture a soundproof wall made of precast PC.

That is, a precast PC having a curved surface
The problem when manufacturing the soundproof wall made of a pretension method is how to arrange the PC steel material on the curved surface of the soundproof wall made of precast PC. In the pretension method, PC
Steel materials can only be arranged in a straight line or a broken line, and PC steel materials cannot be arranged in a curved shape along a curved surface.

Therefore, in the present invention, the precast PC soundproof wall is manufactured by the pretensioning method, with the PC steel material disposed on the curved surface of the soundproof wall being arranged in a folded line.
When the PC steel material is arranged in a folded line, the center of the PC steel material is separated from the center of the soundproof wall, so that a bending stress acts on the curved surface portion, which may cause breakage.

Further, since the PC steel material is disposed over the entire length from one end of the soundproof wall in the vertical direction to the other end thereof,
Even if the PC steel material is cut after the steel material is tensioned, there is a problem that the PC steel material comes into contact with air at the end portion and rust is generated.

According to the present invention, a method of manufacturing a precast PC soundproof wall having a curved surface on which a bending stress does not act on a soundproof wall even when a PC steel material is folded and a broken line is arranged, and a precast PC soundproof wall having a curved surface are provided. The purpose is to provide.

[0011]

SUMMARY OF THE INVENTION In order to advantageously solve the above-mentioned problems, a method of manufacturing a sound-insulating wall made of precast PC having a curved surface according to the present invention is provided at intervals in the left-right direction. One or more molds 6 each having a bottom plate 5 having an upper surface 3 having an arc-shaped cross section and an upper surface 4 such as a flat portion connected thereto are arranged between the plurality of abutments 1 and 2. , 2 are spaced apart in the front-rear direction, and a plurality of PC steel members 7 are arranged in a state of being stretched along the bottom plate 5 in the formwork 6, and the upper surface 3 having an arc-shaped cross section in the formwork 6. And the upper surface 4 connected to it
In the vicinity of the boundary with
Each PC steel material 7 is pressed from above by the steel material bending position holding device 8 to bend each PC steel material 7 into a bent line arrangement state,
Further, the folded line portion 9 of the PC steel material 7 of the portion arranged on the curved upper surface 3 from at least the refraction starting point P of each PC steel material 7 is filled with concrete 10 filled in the formwork 6.
Structure 11 covered with a sheath (sheath) or a pipe or the like so that the steel plate 7 and the PC steel 7 do not adhere to each other, and then the concrete 10 is placed in the form 6 so as to embed each PC steel 7 and the reinforcing steel arranged in the form. It is characterized by being cast and hardening the concrete 10.

According to the second aspect of the present invention, there is provided the first aspect.
In the method for manufacturing a soundproof wall made of precast PC having a curved surface, a plurality of molds 6 having a bottom plate 5 having an upper surface 3 having an arc-shaped cross section and an upper surface 4 such as a flat portion connected thereto.
Are arranged in series, and the formwork 6 is arranged so that the curved upper surface 3 side of the adjacent formwork 6 is adjacent or the upper surface 4 portion connected to the curved upper surface is adjacent. And

According to a third aspect of the present invention, in the method for manufacturing a soundproof wall made of precast PC having a curved surface according to the first aspect, a bottom plate 5 having an upper surface 3 having an arc-shaped cross section and an upper surface 4 such as a flat portion connected thereto. A plurality of molds 6 are arranged in series, and a portion of an upper surface 4 connected to a curved upper surface 3 side of one mold 6 in an adjacent mold 6 and a curved upper surface of the other mold 6 Are arranged so as to be alternately repeated in the left-right direction.

Further, in the sound-insulating wall made of precast / prestressed concrete according to claim 4, the sound-insulating wall is erected along both sides of a railway, a road, etc., and the upper part is made relatively thinner with respect to the lower part, and in the left-right direction. The PC steel material 7 arranged so as to be spaced and extending in the vertical direction is arranged so as to be embedded in the concrete 10, and
The precast / prestressed concrete soundproof wall in which the prestress is relatively introduced into the concrete soundproof wall main body 12 by the opening after the tension of the C steel material 7 is integrally provided with a curved surface portion 13 having an arc-shaped cross section at an upper portion. The PC steel 7 disposed on the curved surface portion 13 is previously covered with a sheath (sheath) or a pipe 14 so as to form an unbonded structure 11 to prestress the concrete 10 on the curved surface portion 13. Is not introduced, and the portion of the PC steel material 7 of the curved surface portion 13 is embedded or fixed in the concrete of the curved surface portion directly or indirectly by the water-blocking filler 15.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 6 show a state in which a soundproof wall 16 made of precast / prestressed concrete is manufactured by the manufacturing method of the present invention. At predetermined intervals, reaction force supporting abutments 1 and 2 are provided, and between each of the abutments 1 and 2, steel H-shaped steel is formed so as to extend in the front-rear direction with an interval in the left-right direction. A sleeper 18 is arranged, and a form support member 19 made of H-shaped steel is placed in parallel with a space in the front-rear direction so as to extend in the left-right direction across the steel sleeper 18 and fixed with bolts or the like. Have been.

H-shaped steel holding members 20 are arranged at right and left intervals so as to extend in the front-rear direction across the form support members 19. A bottom plate having a curved upper surface 3 having an arc-shaped cross section and a flat upper surface 4 connecting the upper surface and the upper surface symmetrically at both ends in the left-right direction so as to extend toward the end. 5 are mounted on the holding member 20 with bolts and nuts 22 at intervals in the left and right direction to form a steel bottom mold 21, and the curved upper surface 3 of each bottom mold 21 is formed. On the upper end level side, a vertically oriented side plate 23 arranged to extend in the front-rear direction.
The lower part of the side mold 24 having the shape is abutted and is detachably fixed by bolts and nuts (not shown).
The side formwork 24 is made of a precast / PC soundproof wall 1.
6 is a mold for molding the upper end side.

In the vicinity of the center of the bottom mold 21 in the left-right direction, an intermediate mold 26 having a vertical plate 25 extending in the front-rear direction is arranged in parallel at intervals in the left-right direction and opposite to each other. And is detachably fixed to the bottom mold 21 by bolts or the like, and extends over the front end and the rear end of the side mold 24 and the front end and the rear end of the intermediate mold 26.
A front formwork 27 and a rear formwork 28 (see FIG. 5) are provided, and are detachably fixed to the side formwork 24, the intermediate formwork 26, and the bottom formwork 21 by bolts or the like, and the bottom formwork is formed. Outside molds 29 for soundproof walls are formed on both right and left sides of the mold 21 respectively.

The inside of each of the outer walls 29 for soundproofing walls is inclined so that the lower part thereof is separated from the middle part form 26 so as to face each of the intermediate part forms 26 at intervals. Are formed in a substantially parallelogram-shaped bulge-forming inner mold 30 and a step-forming mold 30a arranged and fixed on the upper part thereof so as to extend in the front-rear direction. Are fixed to the front mold frame 27 and the rear mold frame 28 which are arranged so as to extend by bolts and nuts (not shown) in a detachable manner.

One side and side forms 24 of the bottom form 21, an inner form 30 for forming the bulging portion, and an intermediate form 26
The front mold 27, the rear mold 28, the inner mold 30 for forming the bulging portion and the like constitute the soundproof wall mold 6. A large number of noise-insulating wall molds 6 having one curved surface configured as described above are formed at intervals in the left-right direction, and are detachably fixed to the mold holding member 20 with bolts or the like.

At a substantially central portion in the vertical direction of the side formwork 24, a plurality of lateral holes 31 for inserting a PC steel material are provided at intervals in the front-rear direction. Holes 31 are provided at the same level position, and at a low level position in the intermediate section formwork 26, a large number of transverse holes 32 for inserting a PC steel material or at the lower end of the intermediate section formwork 26 at intervals in the front-rear direction. Opening lateral holes 32 for PC steel material are provided at the same level.

As shown in FIGS. 2 to 6 in an enlarged manner, the flat upper surface 4 (close to the circular upper surface 3) near the boundary between the arc-shaped upper surface 3 and the flat upper surface 4. At the front side of the arc-shaped upper surface 3) and above the sound-insulating wall form 6, a support beam 34 made of a channel steel or an H-shaped steel is provided so as to extend in the front-rear direction. Alternatively, a U-shaped (portion-shaped) holding frame 36 having a leg 35 made of H-section steel or the like is provided (see FIG. 5), and a mounting flange 37 fixed to the lower end of the leg 35 by welding is provided. , Bottom plate 5 and H supporting it
Bolts 22a inserted through the through holes of the holding member 20 and the mounting flange 37 made of shaped steel
(22) and a nut 22b (2
It is detachably fixed by 2).

The horizontal lower flange 38 of each of the support beams 34 is provided with a plurality of (four in the illustrated case) vertical through holes 39 at intervals in the longitudinal direction of the support beam 34. The upper screw 41 of the steel position holding member 40 for PC steel for directly or indirectly holding the bending portion of the PC steel 7 is inserted through the nut, and the nut 42 screwed to the upper screw 41 is tightened. Thus, the steel position holding member 40 for PC steel is fixed to the support beam 34.

As shown in FIG. 6, the steel position holding member 40 for PC steel is formed of a cylindrical intermediate portion 4 having a large diameter solid circular cross section.
An inverted frusto-conical portion 44 having a small diameter upper screw 41 provided integrally with the upper portion of the upper portion 2 and having a tapered outer surface 43 which is inclined so as to be reduced in diameter in a lower portion of the cylindrical intermediate portion 42. The circular lower end surface connected to the lower end portion of the tapered outer surface 43 has a cross-sectional half extending in the left-right direction and opening at both left and right end sides and downward at a central portion in the front-rear direction. A locking groove 45 for supporting a PC steel bending portion made of a circular concave portion is provided, and an upper end of the tapered outer surface 43 is set to be positioned at an upper surface level of the concrete 10 to be cast. The locking groove 45 for supporting the steel bent portion is made of a precast
It is set to be located at the PC steel material embedded position on the PC soundproof wall 16. The PC steel material position holding device 8 is formed by the holding frame 36 fixed to the formwork 6 so as to take a reaction force and the steel position holding member 40 for PC steel material.
Is configured.

As shown in FIGS. 1 to 6, the level of the locking groove 45 for supporting the bending portion of the PC steel and the PC steel 7 inserted into the horizontal hole 32 for inserting the PC steel provided in the intermediate frame 26.
Is set to be substantially on the same central axis and at the same level, and the PC steel material insertion lateral hole 31 provided in the adjacent side formwork 24 is on the same central axis,
And set to be at the same level,
4 is set so that the level of the PC steel material insertion horizontal hole 31 provided in the intermediate part form frame 26 is higher than the level of the PC steel material insertion horizontal hole 32 provided in the intermediate part formwork 26.

As shown in FIG. 4, in the sound-insulating wall formwork 6 constructed as described above, the sound-insulating wall vertical reinforcing bars 46 are appropriately arranged in parallel in the front-rear direction so as to extend in the left-right direction. A level adjusting spacer (not shown) is interposed, and a distribution force bar (horizontal reinforcing bar) 47 extending in the front-rear direction to intersect with the spacer is disposed. Reinforcing bars 48 and connecting sleeves 49 are disposed at predetermined positions, and a large number (four in the illustrated case) of PC steel members 7 are disposed between the abutments 1 and 2 with an interval in the front-rear direction. At the same time, it is inserted into the lateral hole 32 for inserting the PC steel material in each of the intermediate mold sections 26 and the lateral hole 31 for inserting the PC steel material in the side mold section 24, and is locked in the locking groove 45 for supporting the bending section of the PC steel material. It is arranged to be. Each part of the PC steel material 7 from the flat upper surface 4 in front of the arc-shaped upper surface 3 to the locking groove 45 for supporting the PC steel bending portion and the inner surface of the side mold 24 is stamped into the mold 6. The unbonded structure 11 is covered with a continuous sheath (sheath) or a pipe 14 so as not to adhere to the concrete 10 to be provided. In addition, the end of each PC steel material 7 is inserted into the insertion hole 51 of the center hole jack 50 directly or indirectly attached to the outside of each abutment 1, 2 and the casing 50 of the center hole jack 50.
is connected to a locking member 52 such as a nut engaged with a.

The inner surfaces of the through holes 31 and 32 of each mold 6 have P
The C steel 7 can be supported and its disposition direction can be changed. Next, the movable piston 50b of each center hole jack 50 is extended to tension each PC steel material 7,
The PC steel material 7 is disposed in a bent state in the sound-insulating wall formwork 6. Concrete 10 is filled into the form 6 so as to embed the rebars 46, 47, 48 and the PC steel 7, and is hardened.

Thereafter, the steel position holding member 40 for PC steel is used.
Is removed upward, and the inner mold 30, the side mold 24, the front mold 27, the rear mold 28, and the middle mold 26 are removed from the bulge forming inner mold 30, and each mold is removed. Each of the recesses 53 formed by the steel position holding member 40 for PC steel is filled with mortar 54 and hardened, and P projects from the lower bulging portion 55 of the soundproof wall 16 and the upper portion on the arcuate curved surface side.
The C steel material 7 is cut at a position close to the lower part and the upper part. At this time, the PC steel 7 of the unbonded structure 11
Is 5 per m by cutting the PC steel 7 after tension.
mm, the sheath enters into the sheath (or pipe) 14 from the upper end of the soundproof wall 16, that is, the end face of the sheath (sheath tube) or the pipe 14, and the rust prevention treatment becomes possible.

FIG. 8 shows a state in which the rust-prevention treatment is applied to the PC steel material 7 that has entered the sheath (sheath tube) 14 at the upper end of the soundproof wall 16. The PC steel 7 is rust-proof so that the water-stopping-type synthetic resin adhesive 56 is filled and solidified so that rainwater does not enter the sheath (sheath tube) 14. In this case, the PC
The steel material 7 is embedded and fixed in the concrete 10 indirectly through a sheath (sheath tube) 14.
A paste-like anti-adhesion film instead of 14 is applied to the broken line portion 9
Can be applied to the unbonded structure 11.

That is, in the present invention, in order to arrange the PC steel material 7 from the bending point P, the PC steel material position holding device 8 taking a reaction force on the form 6 is used, and the PC steel material 7 starts to be folded. While pressing point P from above, bend line portion 9 from concrete 10 and PC
Sheath the PC steel 7 so that the steel 7 does not adhere.
Alternatively, by forming the unbonded structure 11 covered with the pipe 14, even if the PC steel 7 is eccentrically arranged like the broken line portion 9, the PC steel 7 is cut by cutting the PC steel 7 after the concrete 10 is hardened. Even if the tension is released and the prestress is relatively introduced into the concrete 10, the prestress is not introduced into the polygonal line portion 9.
Eccentric bending moment.
Conversely, when the PC steel 7 is adhered to the concrete 10, an eccentric bending moment is generated by the eccentric arrangement of the broken line portion 9 of the PC steel 7, and the concrete soundproof wall 16 may be broken.

In the case of the above-described embodiment, the arrangement is such that the curved upper surface 3 having an arc-shaped cross section is adjacent to the curved upper surface 3.
Are arranged in such a manner as to alternately repeat the arrangement state in which the flat upper surfaces 4 are connected to each other alternately, so that the PC steel members 7 are arranged in a straight line between the side molds 24 adjacent in series. Therefore, it is not necessary to attach a means (metal fitting) for turning the direction in which the PC steel material 7 is disposed in the longitudinal direction to the side part formwork 24 or the intermediate part formwork 26, so that the configuration of the soundproof wall formwork 6 is not required. Can be simplified. Also, the shape of the precast / PC soundproof wall is not a uniform cross section in the vertical direction, but has a curved surface structure at the upper portion and a thicker cross section at the lower portion in order to connect with the bridge cross section. For this reason, when manufacturing a plurality of precast / PC soundproofing wall members, the soundproofing is performed so that the lower side and the lower side face each other and the upper side and the upper side face each other when manufacturing the precast / PC soundproofing wall members. When the wall form 6 is manufactured, the arrangement state of the PC steel material 7 can be simplified, and the number of parts in the arrangement direction can be reduced, so that the number of parts can be reduced.

FIG. 7 shows an embodiment in which a precast / PC soundproof wall 16 is manufactured by the manufacturing method according to the second embodiment of the present invention. The soundproof wall forms 6 having the bottom formwork 21 having the upper surface 3 are densely arranged in series, but the other configurations are the same as those in the above-described embodiment. Portions are assigned the same reference numerals as in the above-described embodiment, and descriptions thereof are omitted.

In this embodiment, one precast / PC soundproof wall 16 is manufactured in one bottom mold 21 unlike the above embodiment. Also in this case, the soundproof wall formwork 6 is arranged in series in the same direction, or the arrangement of the curved upper surface 3 having an arc-shaped cross section is adjacent to each other, and the flat upper surface 4 connected to the curved upper surface 3 is different. The arrangement of the soundproof wall formwork 6 that alternately repeats the arrangement state adjacent to each other can be appropriately selected.

FIGS. 8 to 10 show the precast method of the present invention.
FIG. 9 shows one form of a precast / PC soundproof wall 16 manufactured by a method for manufacturing a PC soundproof wall, and FIG.
As shown in the figure, a large number of PC steel members 7 are buried at equal intervals in the left-right direction of the soundproof wall, and a number of vertical reinforcing bars 46 arranged so as to extend in the vertical direction have substantially equal intervals in the left-right direction. Distributing bars (horizontal reinforcing bars) 47 which are disposed at the same time and are arranged so as to extend in the left-right direction are disposed at equal intervals in the vertical direction, and their intersections are connected by welding or number lines or the like. It is formed in a lattice shape.

As described above, the water-proof and hardening type synthetic resin adhesive 56 is filled and solidified in the sheath (sheath) or the pipe 14 on the upper end side of the precast / PC soundproof wall 16, and tension (pre-cast) is applied. P when tension is released
The upper side of the C steel material 7 is embedded and fixed. Also, in the lower thick portion 57 of the precast / PC soundproof wall 16,
A plurality of lower end side connection splice sleeves (connection sleeves) 49 are embedded and fixed at positions shifted in the thickness direction and spaced apart in the horizontal direction.

FIGS. 11 and 12 show a state in which the precast / PC soundproof wall 16 of the present invention is installed on the side of the roadbed 58a of the reinforced concrete elevated structure 58 with a mortar for height adjustment interposed therebetween. In addition, in the state where the connecting vertical reinforcing bar 59 rising from the upper surface of the concrete elevated floor 58 is inserted into the connecting sleeve 49 on the precast / PC soundproof wall 16 side, the concrete elevated floor 5 is inserted.
8 and a precast / PC soundproof wall 1
6 is arranged such that the upper side of the arc-shaped concave portion is on the inside,
And the lower thick portion 57 of the precast / PC soundproof wall 16.
The soundproof wall 16 made of precast PC is fixed to the concrete elevated track floor 58 by mortar 60 or the like filled and solidified in the sleeve 49 inside. In the figure, reference numeral 61 denotes a step portion for supporting the duct forming lid member 62, 63 denotes a duct member, and 64 denotes a connecting reinforcing bar for the splice sleeve 49 which also serves as an anchor.

In the above embodiment, a large number of molds are arranged between the abutments 1. However, when the present invention is implemented, one or more molds are arranged between the abutments 1. You may.

In practicing the present invention, a PC stranded wire, a PC steel wire, a PC steel rod, or the like can be used as the PC steel material.

Although the sleeve or pipe 14 is shown in the above embodiment, the unbonded structure 11 of the PC steel 7 in the broken line portion 9 is a means for preventing the PC steel 7 from being attached to the concrete 10. Alternatively, other known means such as applying a paste-like adhesion preventing film to the broken line portion 9 of the PC steel material 7 may be employed.

[0039]

As described above, the present invention has the following effects. Since the PC steel material of the curved surface portion has an unbonded structure, an eccentric bending moment does not occur, and a soundproof wall made of precast PC that can prevent cracking can be easily manufactured. When the PC steel material of the unbonded structure portion is cut by cutting the PC steel material after being strained, the PC steel material is shortened and enters the end of the member (upper end of the soundproof wall), so that rust prevention treatment can be easily performed. The upper side of the sound insulation wall in the formwork and the upper side of the sound insulation wall in the other formwork, the lower side of the sound insulation wall in the other formwork adjacent to the lower side of the sound insulation wall in the formwork are set to face in series in advance. When manufacturing or arranging the formwork, the number of diverting devices for the PC steel material 7 is reduced as compared with the case where the formwork is arranged in series such as the upper side, the lower side, the upper side, and the lower side of the soundproof wall in the formwork. And manufacturing costs can be saved. In order to manufacture the pre-cast / PC sound-insulating wall by the pretension method, the thickness of the sound-insulating wall member can be reduced, transportation and erection of the sound-insulating wall become easy, and the installation cost of the sound-insulating wall can be saved.

[Brief description of the drawings]

FIG. 1 is a partially longitudinal front view showing a state in which concrete is poured into a formwork to produce a precast / prestressed concrete soundproof wall by implementing the method of the present invention.

FIG. 2 is a partially cut-away longitudinal front view showing a part of FIG. 1 in an enlarged manner.

FIG. 3 is a longitudinal sectional front view showing a part of FIG. 2 in an enlarged manner.

FIG. 4 is a partially cutaway vertical front view showing a part of FIG. 1 at a position away from a part subjected to unbonding processing;

FIG. 5 is a sectional view taken along line AA of FIG. 4;

6 is an enlarged vertical sectional view showing a part of FIG. 5 in an enlarged manner.

FIG. 7 is a partially cut-away vertical front view showing a state in which concrete is cast in a formwork to produce a precast / prestressed concrete soundproofing wall according to another embodiment of the present invention.

FIG. 8 is a longitudinal sectional front view showing the arrangement of reinforcing bars in one embodiment of a precast / prestressed concrete soundproof wall manufactured by applying the method of the present invention.

FIG. 9 is a sectional view taken along line BB of FIG. 8;

FIG. 10 is an enlarged longitudinal side view showing the vicinity of the lower end and the upper end of the precast / prestressed concrete soundproof wall of the present invention.

FIG. 11 is a longitudinal sectional front view showing a state in which the precast / PC soundproof wall of the present invention is installed on a roadbed in a railway concrete elevated structure.

FIG. 12 is an enlarged vertical sectional front view showing a joint portion between a lower end portion of a precast / PC soundproof wall and a roadbed of an elevated structure in FIG. 11;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Abut 2 Abut 3 Upper surface of circular section 4 Upper surface such as flat part 5 Bottom plate 6 Formwork (former for soundproof wall) 7 PC steel material 8 PC steel material bending position holding device 9 Fold line portion 10 Concrete 11 Unbonded structure 12 Concrete soundproofing Wall body 13 Arc-shaped curved surface portion 14 Sheath (sheath) or pipe 15 Waterproof filler 16 Precast / prestressed concrete soundproof wall 17 Base 18 Steel sleeper 19 Formwork support member 20 Holding member 21 Bottom formwork 22 Bolt Nut 23 Side plate 24 Side formwork 25 Vertical plate 26 Middle formwork 27 Front formwork 28 Rear formwork 29 Outer formwork for soundproof wall 30 Inner formwork for forming bulging part 31 PC steel material insertion lateral hole (side) Part form) 32 PC steel insertion hole (middle part form) 34 Support beam 35 Leg 36 Holding frame 37 Mounting Flange 38 Lower flange 39 Through hole 40 Steel position holding member for PC steel 41 Upper threaded rod 42 Cylindrical intermediate part 43 Tapered outer surface 44 Reverse truncated conical part 45 Lock groove for supporting PC steel bending part 46 Vertical for soundproof wall Reinforcing bar 47 Distributing bar (horizontal reinforcing bar) 48 Reinforcing bar for reinforcing bulging portion 49 Connecting sleeve 50 Center hole jack 50a Casing 50b Movable piston 51 Movable piston 52 Locking member 53 Recess 54 Mortar 55 Lower bulging portion 56 Synthetic resin bonding Material 57 Lower wall portion 58 Concrete elevated structure 58a Roadbed 59 Connecting vertical reinforcing bar 60 Mortar 61 Stepped portion 62 Duct forming lid material 63 Duct member 64 Connecting reinforcing bar

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshio Saito 1-32-2 Honcho, Nakano-ku, Tokyo Oriental Construction Co., Ltd. Tokyo Branch (56) References JP-A-11-161621 (JP, A) JP-A 62-233359 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E01F 8/00 B28B 23/04

Claims (4)

(57) [Claims] 1. A bottom plate 5 having an upper surface 3 having an arc-shaped cross section and an upper surface 4 such as a flat portion connected thereto is provided between a plurality of abutments 1 and 2 provided at intervals in the left-right direction. One or a plurality of molds 6 are arranged,
A plurality of PC steel members 7 are arranged in a state of being tensioned along the bottom plate 5 in the formwork 6 at intervals in the front-rear direction between the two, and the upper surface 3 having the arc-shaped cross section in the formwork 6 is provided. Near the boundary with the upper surface 4 connected thereto, the form 6
The PC steel bending position holding device 8 which takes a reaction force
The C steel member 7 is pressed from above to bring each PC steel member 7 into a bent line arrangement state, and further, at least the bending line portion of the PC steel member 7 disposed on the curved upper surface 3 from the bending start point P of each PC steel member 7. 9 so that the concrete 10 and the PC steel 7 filled in the formwork 6 do not adhere to each other.
The unbonded structure 11 is covered with a sheath (sheath) or a pipe, and then the concrete 10 is poured into the formwork 6 so as to embed the PC steel 7 and the reinforcing steel arranged in the formwork 6, and the concrete 10 is hardened. A method of manufacturing a soundproof wall made of precast PC having a curved surface. 2. A plurality of molds 6 each having an upper surface 3 having an arc-shaped cross section and a bottom plate 5 having an upper surface 4 such as a flat portion connected to the upper surface 3 are arranged in series, and curved upper surfaces of adjacent molds 6 are formed. The soundproofing made of a precast PC having a curved surface according to claim 1, wherein the formwork 6 is arranged so that the three sides are adjacent or the upper surface 4 portion connected to the curved upper surface is adjacent. The method of manufacturing the wall. 3. A plurality of molds 6 having a bottom plate 5 having an upper surface 3 having an arcuate cross section and an upper surface 4 such as a flat portion connected thereto are arranged in series, and one of adjacent ones of the molds 6 is formed. The curved upper surface 3 side of the mold 6 and the other mold 6
2. The method for manufacturing a precast PC soundproof wall having a curved surface according to claim 1, wherein the upper surface 4 portion connected to the curved upper surface is arranged so as to be alternately repeated in the left-right direction. 4. It is erected along both sides of a railroad, a road, etc., the upper part is made thinner relative to the lower part, and it is arranged so as to be spaced apart in the left-right direction and extend vertically. The precast / prestressed concrete soundproof wall in which the PC steel material 7 is disposed so as to be embedded in the concrete 10, and the prestress is relatively introduced into the concrete soundproof wall main body 12 by opening the PC steel material 7 after being tensioned. In the above, a soundproof wall made of precast concrete is integrally provided with a curved surface portion 13 having an arc-shaped cross section at an upper portion, and a portion of the PC steel material 7 disposed on the curved surface portion 13 is previously covered with a sheath (sheath) or a pipe 14 or the like. And the pre-stress is not introduced into the concrete 10 of the curved surface portion 13, and the PC of the curved surface portion 13 The part water-blocking filler 15 of timber 7, precast prestressed concrete sound barrier, characterized in that it is embedded in and fixed to the concrete of the curved portion.