JP2003072885A - Structure and method of joining precast concrete plates - Google Patents

Abstract

PROBLEM TO BE SOLVED: To construct a water tank or the like using precast (PCa) panels which allows the tanks or the like with various diameters to be constructed of the PCa panels of the same shape, to construct a joint structure excellent in water sealability of the PCa panels, and to easily form of a simple framework or the like. SOLUTION: The joint structure of PCa plates 1 of a PCa tank with an external cable has a slit steel pipe 10 disposed as a joining pipe toward the outside of the tank on a joint space 2, and right and left sides of the steel pipe 10 are respectively fitted into notched grooves 11 and 11 formed on opposite joining end surfaces 1a and 1a, thereby making adjustable a joining angle of adjacent PCa plates 1 and 1 with the steel pipe 10 as the center. A semi-through type joint framework comprising the steel pipe 10, a resin-based framework 12 and a resin-based separator 13 is used to fill an unshrinkable grout material 14 into a joint space 2-1 and the steel pipe 10. An applied waterproof material 15 is provided between the steel pipe 10 and the groove 11, and a waterproof sealing material 16 is provided inside a joint space 2-2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining structure and joining method for precast concrete plates, for example, a water tank for agricultural and livestock industries using a precast concrete plate, a general water tank, tap water, and sewage. It is effectively applied to water tanks for fire protection and fire protection.

[0002]

2. Description of the Related Art In recent years, water tanks for field irrigation or the like have been replaced with RC structures in which concrete is cast in place using formwork, in terms of quality uniformity, durability, quick construction, and weight reduction. Many have excellent prestressed structures. In this prestressed water tank, a large number of precast concrete panels (hereinafter referred to as PCa panels) are arranged so as to be connected in the circumferential direction, and a large number of PCa panels are integrated by tensioning a plurality of PC steel wires arranged on the outer periphery. It has become.

In such a prestressed water tank, the joint structure of the PCa panel is usually filled with the grout material 3 in the joint space 2 of the PCa panels 1 and 1 to be joined, as shown in FIG. In the joint space 2 inside and outside the water storage tank, elastic sealing materials 4 and 4 are provided for waterproofing.

[0004]

However, in the case of the conventional joint structure as described above, when constructing the water storage tanks having different diameters, the joining angles of the PCa panels 1 and 1 to be joined are changed so that they are adjacent to each other. Since it is necessary to change the angle of the joint end surfaces so that the joint end surfaces of the PCa panels 1 and 1 are parallel to each other, it is necessary to custom-order the PCa panel 1 according to each diameter. There has been a demand for a technology for constructing a water tank.

Therefore, as shown in FIG. 4, when the diameter of the water storage tank is changed and the joining angle of the PCa panels 1, 1 to be joined is changed, the amount of the grout material 3 is increased and the joint angle is increased. It is conceivable to adopt a construction method in which the joint space portion is filled with the grout material 3. According to such a construction method, PCa adjusted to the diameter of the water tank
It is not necessary to make a custom order for each panel 1, and the cost can be reduced significantly.

However, assuming the joint structure as shown in FIG. 4,
Forming materials are required on the side where the joints are widened, and if this is carried out with a conventional formwork structure, the formwork materials and scaffolding structure for placing the joint grout are greatly increased, and the cost merit is reduced by half.

Further, in Japanese Patent Laid-Open No. 2000-43985, adjacent PCa panels 1 and 1 are joined to each other by a semi-cylindrical fitting concave portion and a fitting convex portion having the same shape which are provided on their joint end faces, respectively, so that the joining angle can be adjusted. Then, a sealing member such as rubber may be disposed between the fitting concave portion and the fitting convex portion to perform watertight sealing, and a water tank having a plurality of diameters can be constructed with the PCa panel having the same shape. There has been proposed a concrete panel and a water tank capable of eliminating concrete pouring at the joint between PCa panels.

However, even in the case of this joint structure, since the fitting concave portion and the fitting convex portion are formed at the joint end portions on both sides of the PCa panel respectively, a sealing member (waterproof rubber) such as rubber is also used.
In addition, the cost merit is halved because a special shape is used in order to obtain a good waterproof property against joints that are long in the inner and outer directions.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to construct a water tank using a PCa panel, etc., having various diameters with the same shape of the PCa panel. In addition, the joint structure of the precast concrete plate can be formed, and the joint structure of the PCa panel having excellent water-stopping property can be formed of relatively inexpensive members and can be easily formed with a simple formwork or the like. And to provide a joining method.

[0010]

According to a first aspect of the present invention, there is provided a joining structure in which joining ends of precast concrete plates are joined so as to be able to stop water, and between the joining end faces of the precast concrete plates to be joined. A joint pipe that is arranged and that joins adjacent precast concrete plates to each other so that the joint angle can be adjusted, and a joint pipe that is continuous in the joint longitudinal direction, and one side surface of this joint pipe and the precast concrete plate (in the case of a water tank, etc.) Is a joint structure of a precast concrete plate characterized by having a grout material filled in a first joint space between and.

Claim 1 is applied to a prestressed water storage tank or the like, and uses a joint pipe having a circular cross section or other cross sectional shapes made of steel pipe or the like, and sandwiching the joint pipe between adjacent precast concrete plates. Join with adjustable joint angle. It is preferable that the joining end surface of the precast concrete plate is provided with a fitting recess into which the side portion of the joining pipe fits. In addition, if a special grout material is used, it is not necessary to apply a waterproof material, but if the special grout material is not used, it is partially (for example, the fitting recess of the joint pipe) on the joint end face of the precast concrete plate. Alternatively, the applied waterproof material is applied in advance over the entire joint end surface. Also,
The joint pipe is also a grout injection pipe, injecting grout material into the joint pipe, filling the joint space from the joint pipe, and filling the joint pipe and joint space with the grout material. The second joint space on the opposite side of the joint pipe is filled with a waterproof sealing material or a grout material.

According to a second aspect of the present invention, in the joint structure according to the first aspect, a fitting recess into which a side portion of the joining pipe is fitted is formed on a joining end face of the precast concrete plate, and at least the fitting recess is formed. This is a joint structure for precast concrete boards, characterized in that a waterproof material is provided between the joint pipes. It is preferable that the joining pipe has a circular cross section and the fitting recess has a notched groove having a substantially semicircular cross section. The application waterproof material is applied in advance to the fitting concave portion of the joint end surface of the precast concrete plate. Further, the application waterproof material may be applied to the joint end surface of the fitting concave portion and the first joint space, or the entire joint end surface (first joint space + fitting concave portion + second joint space).

According to a third aspect of the present invention, in the joint structure according to the first or second aspect, the grout material is injected into the joint pipe to fill the joint space from the joint pipe, and the joint pipe and joint space are made of the grout material. It is a joint structure of precast concrete boards characterized by being filled. That is, the joint space is filled with the grout material through the joint pipe so that the joint space and the joint pipe are continuously filled with the grout material. If the joint pipe is provided with a grout hole, the joint space and the joint pipe can be simultaneously filled with the grout material.

According to a fourth aspect of the present invention, in the joint structure according to the first, second or third aspect, the second side opposite to the first joint space (in the case of a water storage tank or the like) sandwiching the joint pipe. The joint structure of precast concrete boards is characterized in that the joint space (outer side in the case of a water tank, etc.) is filled with a waterproof sealing material or grout material. That is, the first joint space on one side is filled with grout material with the joining pipe interposed therebetween,
The other second joint space is filled with a waterproof sealing material or grout material.

A fifth aspect of the present invention is a method for joining the joining ends of the precast concrete plates in a water-tight manner so that a joining pipe continuous in the joint longitudinal direction is formed between the joining end faces of the precast concrete plates to be joined. A mold that covers the first joint space (inside in the case of a water tank, etc.) between the joint pipe and one side surface of the precast concrete plate is attached to the one side surface, and via a separator. It is a joining method for a precast concrete plate, which comprises fixing to the joining pipe, injecting grout material into the joining pipe, and filling the first joint space from the joining pipe.

In the present invention, the joining pipe is, for example, a slit steel pipe having continuous slit holes in the vertical direction, and the protrusion at the base end portion of the separator is inserted into the slit hole and locked, and the tip end portion of the separator. Pierces the formwork, attaches separator stoppers, and tightens the formwork to form a semi-penetrating joint formwork. The mold is preferably a resin system having excellent flexibility. In addition, the grout material is injected into the joint pipe to fill the joint space, the joint pipe and joint space are filled with the grout material, and when the grout material hardens, the tip part protruding from the mold of the separator is cut to form the mold. Remove the frame. The separator is also preferably made of a resin because it has excellent corrosion resistance and can be easily removed by cutting. The second joint space on the opposite side of the joint pipe is filled with a waterproof sealing material or grout material.

According to a sixth aspect of the present invention, in the joining method according to the fifth aspect, the second joint space (in the case of a water tank or the like) opposite to the first joint space is covered with the joint pipe interposed therebetween. A method for joining precast concrete boards, characterized in that a formwork is fixed to the joining pipe via a separator, and grout material is filled into the second joint space from the joining pipe.

Claim 6 is a case in which molds are provided on both surfaces of the precast concrete plate and both the first joint space and the second joint space are filled with grout material through the joint pipe. Use a separator that penetrates the junction pipe,
It can be used for both molds, but from the viewpoint of waterproofness, the separators for each mold are fixed to the joint pipe to be a semi-penetrating type, so that the separator does not become a water drain. Is preferred.

According to the present invention having the above-described structure, (a) the joint angle of the precast concrete plate can be adjusted around the joint pipe, and the joint structure can be constructed without being restricted by the joint angle. It is possible to construct water tanks of various diameters with precast concrete plates (panels) of the same shape.

(B) It is possible to construct a joint structure in which the joint angle can be adjusted with the joint pipe and the grout material, which is less expensive than the conventional method using the mating recess and mating projection and the waterproof rubber. It can be a joint structure.

(C) Since the half-penetrating joint joint form made up of the joint pipe, the form and the separator is used, the joint structure can be easily constructed with a simple formwork device.

(D) Since the continuity of the joint of the grout material and the water from the separator is interrupted by the joint pipe, the grout material in the joint pipe, and the coating waterproof material, it is surely prevented from reaching the opposite side. Excellent water resistance.

(E) If a resin system is used for the separator, it is excellent in corrosion resistance, so that even if it is exposed on the joint surface, there is no problem in the structural properties and durability of the tank and the like.

(F) If a plurality of grout holes are provided in the joint pipe,
The grout material can be reliably filled in the joint pipe and the joint space, and the joint structure becomes reliable.

(G) If a resin system is used for the mold, the flexibility is excellent, the joining angle is followed, and the grout material can be surely filled.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described based on an illustrated embodiment. In this embodiment, a precast concrete (hereinafter referred to as PCa) plate for agricultural use and P
It is an example applied to an outer cable PCa tank using a C steel wire.

As shown in FIG. 1, the outer cable PCa tank is constructed by connecting a large number of PCa plates (PCa panels) 1 in the circumferential direction so as to form a substantially circular tank. FIG. 1 (a) shows a case of a tank having a small diameter using 36 PCa plates 1, and FIG. 1 (b) shows a PCa of the same shape.
This is the case of a tank with a large diameter using 60 plates 1.
In FIG. 1 (a), the joining end surface 1 of the adjacent PCa plates 1 and 1 is
a and 1a are parallel to each other, and in FIG. 1 (b),
Since the joining angle becomes gentle, the joint space on the tank inner surface 1b side of the joint space 2 becomes wider.

In the joint structure of the PCa plate 1 as described above, in the present invention, as shown in FIGS. 1 and 2, a circular joint which is continuous in the joint vertical direction as a joint pipe near the tank outer surface 1c of the joint space 2. A slit steel pipe 10 is provided, and a cutout groove (fitting concave portion) 11 having a substantially semicircular cross section continuous in the joint vertical direction formed on the facing joint end faces 1a, 1a,
The left and right side portions of the slit steel pipe 10 are fitted into the slit steel pipes 11 and PCa adjacent to each other with the slit steel pipe 10 as the center.
PCa of the same shape that can adjust the joining angle of plates 1 and 1
The plate 1 allows the construction of tanks of different diameters.

Furthermore, by using a semi-penetrating joint joint form made up of the slit steel pipe 10, the resin type mold 12, and the resin type separator 13, the first joint space 2 from the slit steel pipe 10 to the tank inner surface 1b is used. 1 is filled with a non-shrink grout material (such as non-shrink cement or non-shrink mortar) 14. The non-shrink grout material 14 is also filled in the slit steel pipe 10.

A coating waterproof material 15 is provided between the slit steel pipe 10 and the notch groove 11. First joint space 2-1
The coating waterproof material 15 may be provided also on the joint end surfaces 1a, 1a. If a special grout material 14 is used,
The coating waterproof material 15 can be omitted. Further, a waterproof sealing material 16 such as an elastic sealing material is provided in the second joint space 2-2 from the slit steel pipe 10 to the tank outer surface 1c.

As shown in FIG. 2 (b), the slit steel pipe 10 is formed with a continuous slit 10a from the top to the bottom.
Further, a plurality of grout holes 10b are formed in the slit 10a at intervals in the vertical direction. The slit steel pipe 10 is arranged so that the slit 10a and the grout hole 10b face the first joint space 2-1 inside the tank,
The base end of the resin separator 13 can be attached to the slit 10a, and the slit 10a and the grout hole 1 can be attached.
0b enables the non-shrink grout material 14 to be injected from the slit steel pipe 10 into the first joint space 2-1.

As shown in FIG. 2 (b), a grout hose 17 is provided at the lower part of the joint end on one side of the PCa plate 1, for example.
Embedded in advance, the non-shrink grout material 14 is injected from the grout hose 17 into the slit steel pipe 10, and is filled from the slit steel pipe 10 into the first joint space 2-1 to form the slit steel pipe 10 and the first joint space. 2-1 is filled with non-shrink grout material 14. By using the slit steel pipe 10 as a grout injection pipe and injecting it into the first joint space 2-1 from the slit steel pipe 10, the non-shrink grout material 14 can be surely filled in the first joint space 2-1. .

As shown in FIG. 2 (a), a locking projection 18 is provided at the base end of the resin separator 13, and the slit steel pipe is inserted into the slit steel pipe 10 through the slit 10a. It can be locked to 10. Further, a plurality of resin-based separators 13 are arranged at intervals in the axial direction of the slit steel pipe 10 (portions other than the grout holes 10b), and the locking projections 18 are temporarily fixed by an adhesive or the like,
It is preferable to attach the slit steel pipe 10 in advance.

The resin mold 12 is a plate material having a length and a width that completely cover the opening inside the tank of the first joint space 2-1 and is excellent in flexibility, so that it can follow various joining angles. And adheres to the inner surface 1b of the tank, and the non-shrink grout material 1
4 can be reliably filled.

Further, the resin type frame 12 has a mounting hole into which the tip of the resin type separator 13 is inserted.
A plurality of holes are provided at intervals in the axial direction of 0. By screwing the separator stopper (nut member) 19 into the male screw of the resin-based separator 13, the resin-based form 12 is attached to the slit steel pipe 10 / PCa plate 1. Fixed against.

In the PCa board joint structure having the above-mentioned structure, the construction is performed in the following procedure (FIGS. 1 and 2).
reference).

(1) The PCa plates 1 are sequentially installed in the circumferential direction on the base of the tank. The slit steel pipe 10 in which the waterproof coating material 15 is applied to at least the notched groove 11 on one side of the PCa plate 1 previously built and the resin separator 13 is attached.
Stick one side of.

(2) The coating waterproof material 15 is applied to at least the notched groove 11 of the PCa plate 1 to be built later, and the notched groove 1
The PCa plate 1 is installed so that one side surface of the slit steel pipe 10 fits into the slit 1.

(3) The resin mold 12 is attached to the first joint space 2-1.
It is attached so as to cover the opening inside the tank, and is tightened and fixed by the separator stopper 19.

(4) The non-shrink grout material 14 is injected into the slit steel pipe 10 from the grout hose 17, and the non-shrink grout material 14 is filled in the slit steel pipe 10 and the first joint space 2-1.
To fill.

(5) The waterproof sealing material 16 is filled in the second joint space 2-2 outside the tank.

(6) The tip of the resin-based separator 13 exposed from the surface of the resin-based mold 12 is cut to cut the resin-based mold 1
Construction is completed by removing 2.

Although the case where the non-shrink grout material 14 is filled only in the first joint space 2-1 on one side of the slit steel pipe 10 has been described above, the first joint space 2-1 and the second joint space 2 are described. -2 may be filled with the non-shrink grout material 14. In this case, without using a separator penetrating the slit steel pipe 10, the resin type molds 12 are attached to both sides of the slit steel pipe 10 via the resin type separators 13, respectively, and the slit steel pipes are formed by two semi-penetrating joint forms. At 10 the continuity is broken.

When no special grout material is used, it is preferable that the coating waterproof material 15 is coated on the entire joint end surfaces 1a, 1a. The non-shrink grout material 14 is poured into the slit steel pipe 10 to form the grout hole 10
The first joint space 2-1 and the second joint space 2-2 can be filled via b.

According to the PCa board bonding structure having the above-described structure, the following operational effects can be obtained.

(A) PCa centering on the slit steel pipe 10
The joint angle of the plates 1 and 1 can be adjusted, and the joint structure can be constructed regardless of the joint angle.

(B) It is possible to construct a joint structure in which the joint angle can be adjusted by the slit steel pipe 10 and the non-shrink grout material 14, and compared with the conventional method using the fitting recess and fitting projection and the waterproof rubber. Thus, an inexpensive joint structure can be obtained.

(C) Since a semi-penetrating joint formwork consisting of the slit steel pipe 10, the resin system form 12, and the resin system separator 13 is used, the joint structure can be easily constructed with a simple formwork device. .

(D) Water leakage from the joints of the grout material 14 and the resin-based separator 13 which may be a concern from the inside of the joint (inside of the tank) to the outside of the joint is filled in the coating waterproof material 15, the slit steel pipe 10 and the slit steel pipe. The non-shrinkable grout material 14 interrupts the continuity, so that it is surely prevented from reaching the outside of the joint, and the water stopping property is excellent.

(E) Since the resin-based separator 13 is excellent in corrosion resistance, there is no problem in the structure and durability of the tank even if it is exposed on the inner surface of the joint.

(F) Since the slit 10a of the slit steel pipe 10 is provided with a plurality of grout holes 10b, the non-shrink grout material 14 is surely filled in the slit steel pipe 10 and the joint space 2 to form a joint structure. It will be certain.

(G) The resin mold 12 has excellent flexibility, can follow the joining angle, and can surely fill the non-shrink grout material 14.

Needless to say, the present invention can be applied not only to the prestressed water tank but also to other tanks using the PCa plate.

[0054]

Since the present invention is constructed as described above, it has the following effects.

(A) The joint angle of the precast concrete plate can be adjusted around the joint pipe, and the joint structure can be constructed without being restricted by the joint angle, and various precast concrete plates (panels) having the same shape can be used. It is possible to construct a water tank with a diameter of.

(B) It is possible to construct a joint structure in which the joint angle can be adjusted with the joint pipe and the grout material, which is less expensive than the conventional method using the mating recess and mating projection and the waterproof rubber. It can be a joint structure.

(C) Since the semi-penetrating joint formwork consisting of the joint pipe, the formwork and the separator is used, the joint structure can be easily constructed with a simple formwork device.

(D) Since the continuity of the joint of the grout material and the water from the separator is interrupted by the joint pipe, the grout material inside the joint pipe, and the coating waterproof material, it is surely prevented from reaching the opposite side. Excellent water resistance.

(E) If a resin system is used for the separator, it is excellent in corrosion resistance, so that even if it is exposed on the joint surface, there is no problem in the structural properties and durability of the tank and the like.

(F) If a plurality of grout holes are provided in the joint pipe,
The grout material can be reliably filled in the joint pipe and the joint space, and the joint structure becomes reliable.

(G) If a resin system is used for the mold, the flexibility is excellent, the joining angle is followed, and the grout material can be surely filled.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a joint structure for a precast concrete plate according to the present invention, where (a) is a small diameter tank and (b) is a large diameter tank.

FIG. 2 is an enlarged view of the joint structure of FIG. 1, (a) is a plan view, and (b) is a vertical sectional view.

FIG. 3 is a plan view showing a conventional joining structure.

FIG. 4 is a plan view showing a conventional improved joining structure.

[Explanation of symbols]

1 ... PCa board (PCa panel) 1a ... Joined end face 1b ... tank inner surface 1c ... tank outer surface 2 ... Joint space 2-1 ... First joint space 2-2 ... Second joint space 10 ... Slit steel pipe 10a ... slit 10b ... Grout hole 11 ... Notch groove (fitting recess) 12 ... Resin-based formwork 13 ... Resin-based separator 14 ... Non-shrink grout material 15 ... Applied waterproof material 16 ... Waterproof sealing material 17 ... Grout horse 18 ... Locking protrusion 19 ... Separator stopper

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tetsuro Miyata             4-9-3 Matsugaya, Taito-ku, Tokyo F-term (reference) 2D063 DA17 DA20                 3E070 AA03 AB02 BH01 DA05 KA01                       KA09 KB02 KC06 QA04 VA13

Claims (6)

[Claims] 1. A joining structure in which joining ends of precast concrete plates are joined so as to be able to stop water, and the precast concrete plates are placed between joining end faces of the precast concrete plates to be joined, and adjacent precast concrete plates are joined together. Precast concrete, characterized in that it has a joint pipe continuous in the joint longitudinal direction for jointing with adjustable angles, and a grout material filling the first joint space between the joint pipe and one surface of the precast concrete plate. Board joint structure. 2. The joint structure according to claim 1, wherein a fitting recess into which a side portion of the joining pipe fits is formed on a joining end face of the precast concrete plate, and at least a waterproof portion is provided between the fitting recess and the joining pipe. A structure for joining precast concrete boards, which is characterized by the provision of materials. 3. The joint structure according to claim 1, wherein the grout material is injected into the joint pipe to fill the joint space from the joint pipe, and the joint pipe and joint space are filled with the grout material. Characteristic pre-cast concrete board joint structure. 4. The joint structure according to claim 1, 2 or 3, wherein the second pipe is provided on the opposite side of the first joint space with the joint pipe interposed therebetween.
A joint structure of precast concrete boards, characterized in that the joint space is filled with waterproof sealing material or grout material. 5. A method for joining joint ends of precast concrete plates in a water-tight manner so that joint pipes that are continuous in the joint longitudinal direction are installed between the joint end faces of the precast concrete plates to be joined. And a mold for covering the first joint space between the one side surface of the precast concrete plate and the one side surface are affixed to the one side surface, fixed to the joint pipe through a separator, and grout material is poured into the joint pipe. A method for joining precast concrete boards, comprising filling the first joint space from a joining pipe. 6. The joining method according to claim 5, wherein a mold that covers the second joint space on the opposite side of the first joint space with the joint pipe interposed therebetween is fixed to the joint pipe via a separator, and the grout material is used. A method for joining precast concrete plates, characterized in that the second joint space is filled from the joining pipe.