JPH0543832B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for constructing a concrete structure, particularly when pouring the sloped wall portion of the structure.
This invention relates to a method for placing concrete into a steel shell that supplies and fills concrete into a steel shell that has been preassembled to form the external shape of an inclined wall, and a concrete placement device used to carry out this method. be.

[Conventional technology]

As an example of a construction method for constructing a concrete structure, such as a marine platform, a steel shell (a high-strength member of the marine platform) that forms the outer shape of the marine platform is assembled in advance, and concrete is poured inside this steel shell. A method of pouring is known.

Conventionally, in order to place concrete inside the steel shell using this construction method, a method has been considered in which a concrete pipe for supplying concrete is inserted into the steel shell and the concrete is sent into the steel shell through this concrete pipe. There is.

[Problem that the invention seeks to solve]

However, with this concrete placement method, the sloped walls of marine platforms,
That is, when pouring an inclined wall, there is a risk of concrete separation or insufficient filling of the concrete due to poor flow of concrete within the steel shell. That is, in the inclined wall portion of a large structure such as an offshore platform, the steel shell is uniformly and
It was extremely difficult to fill it in a dense state.

The present invention has been made in view of the above circumstances, and its purpose is to enable concrete to be uniformly and densely filled into a steel shell when pouring an inclined wall. An object of the present invention is to provide a method and device for pouring concrete into a steel shell.

[Means for solving problems]

The method for placing concrete in a steel shell of the present invention is as follows:
In a method of pouring concrete inside a steel shell assembled along an inclined surface to form the outer shape of a concrete structure, a plurality of supply pipes for supplying concrete are inserted into the steel shell, and then Concrete is discharged from each supply pipe into the steel shell while sequentially switching the supply pipes that discharge concrete.
The concrete discharged by the supply pipes is vibrated by a vibrator, and each of the supply pipes is pulled up along the steel shell to fill the steel shell.

Further, the apparatus for placing concrete into a steel shell of the present invention is an apparatus for placing concrete inside a steel shell assembled along an inclined surface to form the outer shape of a concrete structure, and the apparatus pumps concrete. A plurality of supply pipes are connected to the tips of the concrete pipes via switching valves, vibrators are provided near the tip members of these supply pipes, and the supply pipes and vibrators are integrally fixed to the structure. The structure is characterized in that the body is provided with a guide roller that rollably engages with a guide rail provided along the inclination direction of the steel shell when the structure is pulled up along the steel shell.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 4 is a diagram showing a state in which the concrete placing device A according to the present invention is inserted into a steel shell K. First, the configuration of the concrete placing apparatus A will be explained with reference to FIG. 1. In the figure, reference numeral 1 indicates a concrete pipe. Concrete pipe 1 is
It transports concrete sent out from a concrete pump (not shown). A switching valve 2 is provided at an end 1a of the concrete pipe 1, and supply pipes 3, 3 are connected to the switching valve 2. The switching valve 2 has a valve body 4 therein operated by a hydraulic cylinder 5, thereby selectively feeding the concrete transported by the concrete pipe 1 into the supply pipes 3, 3. Also,
The supply pipes 3, 3 are fixed by movable tables 7, 8. Vibrator mounts 9, 9, .
Vibrator 1 via anti-vibration rubber (not shown)
0, 10,... are attached. The vibrators 10, 10, ... include the same vibrators 10, 1.
A power supply cable 12, which supplies power to 0,...
12, . . . are connected to each other, and these power supply cables 12, 12 . Furthermore, a rod 13 is fixed to the movable tables 7 and 8. At both ends of the rod 13 and the upper surface of the movable tables 7, 8, guide rollers 14,
14, . . . and guide rollers 15, 15, . . . are provided, respectively. These guide rollers 14, 14, guide rollers 15, 15, . . . , and rod 13 are provided so that each of these components is at a symmetrical position with respect to a line of symmetry.

On the other hand, on the inner wall of the steel shell K, I-shaped steels 23, 23 are arranged in parallel along the inclination direction of the steel shell K. Here, a concrete placing device A is placed inside the steel shell K.
is inserted, the guide rollers 14, 1
4, 15, 15 are in contact with the I-shaped steel, and the guide rollers 14, 14, 15, 15 are able to roll freely, thereby allowing the concrete pouring device A to move along the inclined direction of the steel shell K. It is movable. Furthermore, a wire 21 is fixed to the movable table 8 of the concrete placement device A. This wire 21 is connected to a winch 2 installed near the entrance of the steel shell K shown in FIG.
2 to move the concrete placing device A.

A method of pouring concrete into a steel shell K shown in FIG. 4 using the concrete pouring apparatus A configured as described above, that is, a method of pouring concrete into a steel shell according to the present invention will be explained. . First, the concrete placing device A is inserted into the steel shell K. At this time, the guide rollers 14, 14 and the guide roller 1
5 and 15 are engaged with the I-shaped steels 23 and 23. Next, the winch 22 is operated to extend the wire 21, and the concrete placement device A is lowered to the concrete placement location within the steel shell K. When the concrete placement device A descends to the concrete placement site, the concrete pump is started to discharge concrete from the supply pipes 3, 3 into the steel shell K. At this time, the switching valve 2 is operated to sequentially switch the supply pipes 3, 3 through which the concrete flows, and at the same time, the vibrators 10, 10, . . . are activated. Then, as concrete is supplied from the supply pipes 3, 3, the winch 22 is operated to wind up the wire 21, and the apparatus main body is pulled upward along the inclination direction of the steel shell K. Through the above series of operations, the steel shell K
Concrete will be poured inside.

In the above-mentioned concrete pouring device A, concrete is supplied into the steel shell K by switching the supply pipes 3 and 3 sequentially by the switching valve 2, so that the concrete is properly placed inside the steel shell. The concrete is distributed within the steel shell K so that there is no flow failure or separation phenomenon within the steel shell K. In addition, in the concrete placing device A, vibrators 10, 10, ... are arranged near the tips of the supply pipes 3, 3, and while applying vibration with these vibrators 10, 10, ..., concrete is poured into the steel shell K. Since the container is filled with concrete, it is possible to densely fill the concrete supplied by the supply pipes 3, 3. Furthermore, with the concrete placing apparatus A, large-scale structures such as marine platforms can be easily constructed due to the above-mentioned effects. Furthermore,
The concrete placing device A has a guide roller 1.
4, 14, 15, and 15 are provided, the above-mentioned concrete supply and filling work can be performed efficiently.

In the above embodiment, two supply pipes 3, 3 are connected to the switching valve 2, but a larger number of supply pipes may be connected to the switching valve 2. Furthermore, the above-described concrete placing method and apparatus can also be applied to placing concrete inside a general formwork.

〔Effect of the invention〕

As explained above, according to the present invention, concrete is supplied into the steel shell by sequentially switching the supply pipes, and the concrete supplied by the supply pipes is filled into the steel shell while being vibrated by a vibrator. Since the supply pipe is pulled up along the steel shell and filled into the steel shell, the concrete can be supplied into the steel shell in a uniform state without causing poor flow. The vibration allows the concrete supplied into the steel shell to be densely filled without separation, and can be filled while pulling up the supply pipe, making it possible to perform concrete supply and filling operations efficiently. This has advantages such as making it possible to easily construct large structures such as marine platforms.

[Brief explanation of drawings]

1 to 4 show embodiments of the present invention;
The figure is an overall plan view of the concrete pouring device, Figure 2 is a sectional view taken along line a-a of the concrete pouring device with the concrete pouring device inserted into the steel shell, and Figure 3
The figure is a bb-b sectional view of the concrete pouring device with the concrete pouring device inserted into the steel shell, and FIG. 4 is a schematic diagram for explaining the method of pouring concrete into the steel shell. . 1... Concrete pipe, 2... Switching valve, 3
... Supply pipe, 10 ... Vibrator, 14, 15
...Guide roller, 23...I-shaped steel (guide rail).

Claims (1)

[Claims] 1. A method of pouring concrete inside a steel shell assembled along an inclined surface to form the outer shape of a concrete structure, in which a plurality of concrete supply tubes are placed inside the steel shell. The supply pipes are inserted, and then concrete is discharged from each supply pipe into the steel shell while sequentially switching the supply pipes for discharging concrete, and while the concrete discharged by the supply pipes is vibrated by a vibrator, A method for placing concrete into a steel shell, the method comprising filling a pipe into the steel shell while pulling the pipe along the steel shell. 2. In a device that places concrete inside a steel shell assembled along an inclined surface to form the external shape of a concrete structure, multiple supply pipes are connected to the tip of the concrete pipe that pumps the concrete via a switching valve. A vibrator is provided near the tips of these supply pipes, and the supply pipe and vibrator are integrally fixed to the structure, and when the structure is pulled up along the steel shell, An apparatus for pouring concrete into a steel shell, characterized in that a guide roller is provided that rollably engages with a guide rail provided along the inclination direction of the steel shell.