JPS59165768A - Curing of oblique concrete structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for curing a concrete structure tilted in the direction of gravity, by sprinkling water only on the upper surface of the concrete structure after pouring in the direction of gravity. This invention relates to a curing method that can form a water film that flows down along both the upper surface and the lower surface, and that can cure concrete using the water film.

In general, the sliding form construction method is used when molding cylindrical structures such as silos, chimneys, etc. whose diameters are gradually reduced in the height direction using concrete. This sliding form construction method involves pouring concrete into a truncated cylindrical ring with a predetermined height.
Furthermore, rings whose diameters are successively reduced are placed on top of this concrete ring.

These stacked concrete rings each have a truncated conical cylinder shape and are defined by concrete walls that are inclined in the direction of gravity. In addition, when concrete rings are successively placed in the height direction using the sliding form method described above, the rings are stacked from the bottom to the top, so after pouring the concrete to form the bottom ring, , it will be unframed in a short time and then framed to form the upper ring located above it.

Therefore, it is necessary to cure the concrete wall or ring as soon as possible after it has been unframed and poured.

By the way, in general, in order to cure a concrete wall structure after pouring, a method is adopted in which water is sprinkled on the wall surface to form a water film, but concrete wall structures cast by the sliding form method Since the object is tilted in the direction of gravity, it is possible to sprinkle water on the top surface, but not on the bottom surface, so curing can only be done using a curing compound method.

Curing using this curing compound method has the drawbacks of being complicated and expensive.

Therefore, the present invention was devised to effectively solve the problems in curing methods for concrete structures in the direction of gravity.

The purpose of the present invention is to sprinkle water only on the upper surface of a concrete structure after pouring in the direction of gravity, thereby forming a water film that flows down both the upper surface and the lower surface.
To provide a curing method capable of curing concrete using a water spray film.

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, a concrete structure 1 as a wall structure inclined in the direction of gravity is cast by a sliding form construction method or the like. This concrete structure 1 is formed by pouring concrete into a formwork that is regulated to sandwich the upper surface part 2 and lower surface part 3, and after pouring, the formwork is moved upward and framed. It will be removed from the framework as much as possible. A through hole 4 penetrating from the upper surface part 2 to the lower surface part 3 is formed in the cast concrete structure 1 immediately after or at the same time after it is unframed. As shown in FIG. 2, a plurality of through holes 4 are formed in one wall of the concrete structure 1 at predetermined intervals. Further, these through holes 4 are formed so that their diameters are narrowed so that the water led out from the upper surface portion 2 flows down along the lower surface portion 3.

After forming the through hole 4, the nozzle 5 is inserted from above the upper surface part 2.
Sprinkle water through etc. The water sprinkled on the upper surface part 2 naturally flows downward from above to form a water film 6 of a predetermined thickness to cover the upper surface part 2. The water film 6 flowing down on the upper surface part 2 is led out to the lower surface part 3 through the through hole 4,
A water film 7 is formed that flows down along this line.

In particular, the through holes 4 allow water from the upper surface 2 to flow out along the lower surface 3 while attenuating its flow velocity.

Therefore, the amount of water sprinkled on the upper surface part 2 is determined to be sufficient to form a water film 6 flowing down along the upper surface part 2 and a water film 7 flowing down along the lower surface part 3.

By spraying water only on the upper surface part 2 in this way, it is possible to form water films 6 and 7 flowing down along both the upper surface part 2 and the lower surface part 3, and this flowing water film 6 can be formed.
．． 7, the concrete structure 1 after pouring is cured. After the curing process is completed, watering is stopped and the through holes 4 are closed.

As shown in FIG. 3, a guide tube 8 is detachably provided in the through hole 4 to prevent the diameter of the through hole 4 from collapsing and expanding due to the flowing water passing through the through hole and led out to the lower surface portion 3 side. It is being After the curing process is completed, the guide tube 8 is removed and the through hole 4 is closed with concrete.

Furthermore, as shown in FIG. 3, by providing the male die 10 in advance in the formwork 9 that regulates the upper surface portion 2, it is possible to form the male die 10 integrally with the concrete structure 1 at the same time as removing the frame. In addition, when closing the through hole 4 after curing, both openings are grounded and the upper and lower surfaces 2 and 3 are formed into flat surfaces,
The inside and outside can be separated as separate spaces.

In summary, according to the present invention, the following excellent effects are achieved.

(1) By sprinkling water on one side of the upper surface, a water film that naturally flows down in the direction of gravity can be formed on both the upper and lower surfaces. It is possible to achieve curing of concrete with a water film.

(2) Also, when pouring concrete structures that are inclined in the direction of gravity, water film curing can be achieved by adding a process of forming through holes that penetrate from the upper surface to the lower surface, making the work easier. be.

[Brief explanation of the drawing]

FIG. 1 is a schematic side sectional view for explaining the present invention in detail;
FIG. 2 is a partial plan view showing a structure for implementing the method of the present invention, and FIG. 3 is a partially schematic side sectional view showing a modified embodiment. In the figure, 1 is a concrete structure, 2 is an upper surface, 3 is a lower surface, 4 is a through hole, and 6 and 7 are water films. Patent applicant Nobuo Kinutani0 σ
--4″＼Figure 3

Claims (1)

[Claims] In a concrete structure that is cast and formed at an angle with respect to the direction of gravity, a penetration that penetrates the concrete structure from the top surface to the bottom surface of the concrete structure that is cast and formed at the same time as the concrete structure is cast and formed. A hole is formed and water is sprayed so as to form a water film that flows down along the upper surface, and the water sprayed on the upper surface is led out to the lower surface through the through hole and a water film that flows down along this. A method for curing a sloping concrete structure, characterized by forming a slanted concrete structure.