JPS6268924A - Construction for underwater reinforced concrete - Google Patents

Abstract

PURPOSE:To facilitate construction and prevent concrete from being deteriorated, by fitting seawater-corrosion-proof sheathing boards on both sides of a reinforced cage, to install the reinforced cage in water, and by casting concrete between the seawater-corrosion-proof sheathing boards. CONSTITUTION:Sheathing boards 3 are installed on the both sides of a reinforced cage 2 confronting the boards 3, and hooks 6 are fixed on the reinforcements 8 of the reinforced cage 2, and a hook 7 is fixed on a plate 9. After that, the reinforced cage 2 is installed in water, and the lower end sections of the sheathing boards 3 are embedded into the bottom bed of the water to a specified depth, to be fixed. Between the sheathing boards 3 confronted with each other, concrete 10 is cast up to the upper ends of the sheathing boards 3, and the reinforced cage 2 is completely embedded in the concrete 10. As a result, all works on the assembly, overhauling, and removal of molds are saved to facilitate the execution of work extremely.

Description

[Detailed Description of the Invention] Industrial Application Field This invention is a reinforced concrete structure built underwater.
Concerning construction methods.

BACKGROUND OF THE INVENTION Conventionally, reinforced concrete in seawater, such as breakwaters, has been constructed using the formwork method, caisson method, or cast-in-place pile method.

Problems that the invention aims to solve However, construction using the formwork method is difficult because the assembly, disassembly and removal of the formwork is cumbersome depending on the location. In addition, construction using the caisson construction method and cast-in-place piles has the disadvantage that it tends to require large-scale construction and significantly increases construction costs because it involves continuous work using heavy machinery, such as making the caisson, towing it, and driving the piles.

Moreover, no matter which construction method is used, reinforced concrete is constantly exposed to seawater, so deterioration of the concrete due to seawater is unavoidable.

In particular, in recent years, the problem of concrete deterioration due to seawater has increased, and the covering and materials of concrete have become a major problem.

This invention was proposed in order to solve the above-mentioned conventional problems. It is extremely easy to construct and can prevent the deterioration of concrete due to seawater, and can be used as an alternative construction method to the caisson construction method and cast-in-place piles. The purpose of this study is to provide a method of constructing reinforced concrete that will hold great promise in the future.

Means for Solving the Problems This invention was proposed in order to solve the above-mentioned conventional problems, and includes providing seawater corrosion-resistant weir plates on both sides of the reinforcing bar cage with a space between them. Then, the reinforced concrete cage is erected underwater, and then concrete is poured between the opposing seawater corrosion-resistant weir plates to create reinforced concrete 1.
The above purpose is achieved by constructing the following.

Example Hereinafter, the construction method of the present invention will be explained step by step.

0 Assemble the necessary number of reinforcing bars 2 of a predetermined width, predetermined height, and predetermined thickness depending on the scale of the reinforced concrete temple Buddha 1 to be constructed.

■ Next, seawater corrosion-resistant weir plates (hereinafter referred to as weir plates) 3, 3 are erected on both sides of the reinforcing cage 2.

The weir plate 3 used here is vertically long and thin.

A reinforcing rib 4 that protrudes inward is attached to the periphery of the weir plate 3.
It is formed continuously around the entire circumference. Furthermore, a reinforcing rib 5 is formed at the inner center portion over the entire length of the weir plate 3. The reinforcing ribs 4, 4 at both the upper and lower ends of the weir plate 3 and the reinforcing ribs 4, 4 at both the left and right ends are provided with hooks 6 and 7 that protrude to a certain length.
are formed respectively. The length of the hook 6.7 serves as a guideline to ensure a cover of Conch IJ -) 10.

Furthermore, the reinforcing ribs 4, 4 at both left and right ends are provided with protrusions 4a and grooves 4b over the entire length of the reinforcing ribs 4, 4.

Note that this type of weir plate 3 is made of a plastic material such as glass fiber reinforced plastic material (FRP).

The weir plates 3, 3 formed in this way are erected on opposite sides of the reinforcing bar cage 2, and the hooks 6 are attached to the reinforcing bars 8 of the reinforcing bars 2, and the hooks 7 are attached to plates 9 welded to the reinforcing bars 2 in advance. Secure by hooking.

Furthermore, the adjacent weir plates 3, 3 have a projection 4a and a groove 4b.
Complete contact is achieved by engaging the two.

(2) Next, the reinforcing bars 2 are erected in the water, and the lower ends of the weir plates 3, 3 are fixed by embedding them into the ground at the bottom of the water to a predetermined depth. By this method, the required number of reinforcing bars and 2 are installed in the water. Adjacent reinforcing bars 2, 2 are completely connected by a joint fitting such as a coupler, and the weir plates 3, 3 are completely brought into close contact by engaging the protrusion 4a and the groove 4b.

■ Next, concrete 10
The reinforcing bars 2 are completely buried in the concrete IJ-1-10.

By this construction method, a reinforced concrete 1 in which the reinforcing bar cage 2, the weir plate 3, and the concrete 10 are integrated is constructed underwater.

Effects of the Invention The present invention has the following effects because it has the above configuration.

■ All of the weir plates are attached above ground and are completely fixed with hooks, and there is no need for any shoring to support the weir plates, making construction extremely easy as there is no need to assemble, dismantle, or remove formwork underwater. It's easy to do.

Furthermore, compared to construction using the caisson method or cast-in-place piles,
Construction costs can be reduced as there is little need for large heavy machinery.

- Since the concrete surface is completely covered with a seawater corrosion-resistant weir plate, deterioration of the concrete IJ-t due to seawater can be completely prevented.

[Brief explanation of drawings]

Figures 1 to 4 show an embodiment of the present invention. Figure 1 is a partial plan view of a reinforced concrete IJ-t, and Figures 2 and 3 are a weir plate in Figure 1. and the connection diagram with reinforcing steel, No. 4
The figure shows how the weir plates are installed. 1. Car, 3.. Weir plate, 4, 5.. Reinforcement ribs, 6. 7.. Hooks, 8.. Vertical reinforcing bars, 9.. Plate.

Claims (1)

[Scope of Claims] Seawater corrosion-resistant weir plates are installed on both sides of the reinforcing bar cage with a space between the reinforcing bar cages, and then the reinforcing bar cage is erected in water, and then the seawater corrosion-resistant weir plate is installed on both sides of the reinforcing bar cage. A construction method for underwater reinforced concrete, which is characterized by pouring concrete between the weir plates.