JPH04222773A - Placing device of steel pipe concrete column and placing method thereof - Google Patents

Abstract

PURPOSE:To facilitate moving operation of a bucket and, at the same time, to make it difficult to have the influence of wind to promote execution efficiency by raisin the concrete bucket up to the upper position of a steel pipe to make it possible to place concrete without moving if from the position in the case a steel pipe concrete column is constructed. CONSTITUTION:A placing device of a steel pipe concrete column is so constituted that openings 3 are provided to a tremie pipe 4 inserted into a steel pipe at a proper interval lengthwise thereof, opening and shutting covers 5 capable of opening only inward of the tremie pipe 4 are provided to the openings 3, and a vibrator 9 is provided to the peripheral surface of the lower part of the tremie pipe 4. The placing device is prepared, the front ends of concrete supplying flexible hoses 6 are inserted into the openings 3 of the tremie pipe 4, concrete is poured to the inside thereof from the openings 3 of the tremie pipe, and the concrete is orderly placed from the lower part of the steel pipe while raising the tremie pipe orderly.

Description

Detailed Description of the Invention [0001] [Industrial Application Field] The present invention provides a pouring device and a pouring method that save labor in concrete pouring of steel pipe concrete columns and improve workability. Regarding. [0002] Conventionally, when constructing a steel pipe concrete column, as shown in Fig. 3, a steel pipe column 21 having about 2 to 3 layers as a section is installed at a predetermined position, and the steel pipe sections are welded. After that, the steel pipe column 21 and the beam 22 are connected, and further work such as slab reinforcement is performed, and concrete is placed inside the steel pipe column 21. [0003] When pouring this concrete, Fig. 4
As shown in the figure, a bucket 25 to which a tremie pipe 24 is connected via a flexible tube 23 is used, and the bucket 25 is placed on the ground and concrete is transferred from a ready-mixed concrete truck to the bucket 25.
Pour the water. By raising and lowering this bucket 25 using the crane hook 26, the lower end of the tremie tube 24 is inserted into the steel pipe column 11, and the tremie tube 24 is successively removed from the lower part of the steel tube column 21 at intervals of about 50 to 100 cm. −
Concrete was being poured while the pipe 24 was being raised. 0004

[Problem to be solved by the invention] Conventional steel pipe concrete
In the construction method of the column, the bucket and the tremie pipe are connected together for a long time (for example, 20 to 25 m), so a large space is required for unloading the concrete. Furthermore, when inserting a tremie pipe into a steel pipe, the bucket must be lifted to a considerable height by a crane, making crane operation difficult. Further, when inserting a tremie tube into a steel pipe, since there are protrusions such as a diaphragm inside the steel pipe, it is troublesome and takes a considerable amount of time to insert the tremie tube. Furthermore, when pouring concrete into a steel pipe, it is necessary to gradually raise the lower end of the tremie pipe, so the bucket must be gradually raised, and the concrete in the bucket is raised gradually. It becomes difficult to operate the on-off valve for supplying the pipe. Because the buckets and the like had to be raised high, they swayed under the influence of the wind, making it difficult to work, and it took a long time to pour concrete, resulting in poor workability. . [0006] Therefore, the present invention allows concrete to be poured without having to raise the bucket to the upper position of the steel pipe and move it from that position, making it easier to move the bucket, and preventing damage caused by wind. The purpose is to make it less susceptible to negative effects and improve workability. [0007] The present invention provides a steel pipe concrete column casting apparatus and a casting method that achieve the above objects. [0008] The invention of the casting device is such that openings are provided at appropriate intervals in the longitudinal direction of a tremie pipe inserted into a steel pipe, and each opening is provided with an opening/closing lid that allows opening only inward of the tremie pipe. A vibrator is attached to the outer periphery of the lower part of the tremie tube. The invention of the pouring method uses the above-mentioned pouring device to insert a tremie pipe into a fixed steel pipe for pouring a concrete column. Then, a flexible hose for supplying concrete is inserted into the opening of the tremie pipe to cause concrete to flow into the tremie pipe and further flow out from the lower end of the tremie pipe to the lower part of the steel pipe. Furthermore, the tremie tube is pulled up at predetermined intervals, and the flexible hose is sequentially inserted from the upper opening of the tremie tube to the lower opening, and the concrete is allowed to flow into the tremie tube one after another. concrete was poured. [Operation] In the above-mentioned steel pipe concrete column casting apparatus and method, a concrete bucket connected to a flexible hose is placed in a crate at the upper position of a steel pipe fixed at a predetermined position.
Concrete can be poured into the tremie pipe through a flexible hose and poured without having to be moved by simply lifting it up with a pipe. In addition, the tremie pipe is lifted by a crane and inserted into the steel pipe, and as concrete is poured into the steel pipe,
The tremie tube is gradually raised, but since the tremie tube has a smaller external shape than the bucket, it is less affected by wind.
Good workability. [Embodiment] An embodiment of the present invention will be explained with reference to FIGS. 1 and 2. [0012] When constructing steel pipe concrete columns, 2-
A columnar steel pipe 1 with a length equivalent to three layers is fixed in a predetermined position, further connected to a beam 2, and after slab reinforcing work, concrete is poured into the steel pipe 1. For this concrete pouring, a long tremie pipe 4 having a plurality of openings 3 is used.
Use a pouring device consisting of: The tremie 4 is inserted into the steel pipe 1 fixed at a predetermined position so that concrete can be fed into the steel pipe. A plurality of openings 3 are provided at appropriate intervals in the longitudinal direction of the tremie pipe 4, and the upper end of an opening/closing lid 5 is pivoted inside each opening 3, and the opening/closing lid 5 is used for supplying concrete. flexible hose 6
can be opened so that it can be inserted only from the outside. In addition, a rod-shaped vibrator 9 is attached to the lower outer peripheral wall of the tremie tube 4.
is attached to the tremie tube 4, and its cable is attached upward along the peripheral wall of the tremie tube 4.
It is designed to vibrate the concrete to make it easier to flow downward. [0014] Using the above-mentioned pouring equipment, steel pipe concrete is
When pouring a column, first fix the steel pipe 1 in a predetermined position. Then, the tremie tube 4 is lifted up by the crane hook 7a and inserted into the steel tube 1. Next, concrete is poured from the ready-mixed concrete truck into the bucket 8 connected to the flexible hose 6 on the ground, and the bucket 8 is lifted by the crane hook 7b and held at the upper position of the steel pipe 1. The tip is inserted into the opening 3 of the tremie tube located above the steel pipe 1. Concrete flows into the tremie pipe 4 by operating the on-off valve of the bucket 8, and concrete is poured into the lower part of the steel pipe 1. Note that it is possible to send concrete into the opening 3 of the tremie pipe using a concrete pump without lifting the bucket 8. When concrete has been poured to a predetermined height, the tremie pipe 4 is lifted up by the crane hook 7a, and
The flexible hose 6 is inserted into the opening 3 one space below the previous opening 3, and concrete is poured in the same manner as described above. In this way, by lifting the tremie pipes 4 one after another and pouring concrete, when the steel pipe concrete column has been poured, the tremie pipe 4 is pulled out from the steel pipe 1, the bucket 8 is lowered, and the work is continued. Complete. [0016] According to the steel pipe concrete column casting device or the casting method of the present invention, since the bucket and the tremie pipe are separate bodies, the bucket can be easily moved and concrete can be easily moved. - Requires less space for unloading,
The work of inserting the pipe into the steel pipe can be easily done without requiring much time. In addition, since the bucket does not have to be moved while being held in the upper position of the hopper, it is easy to operate the opening/closing valve of the concrete bucket, and it is less affected by wind during work, making it easier to pour concrete. It is easy and has good construction properties.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a pouring device of the present invention.

FIG. 2 is an explanatory diagram showing a method of constructing a steel pipe concrete column using a pouring device.

FIG. 3 is an explanatory diagram showing a conventional method of constructing a steel pipe concrete column.

FIG. 4 is an explanatory diagram of a state in which concrete is poured into a bucket using a conventional pouring method.

[Explanation of symbols]

1 Steel pipe 3 Opening 4. Tremy tube 5 Opening/closing lid 6 Flexible hose 9. Vibrator

Claims (2)

[Claims] Claim 1: A steel pipe concrete column casting device for feeding concrete into a steel pipe, in which a tremie pipe inserted into the steel pipe is provided with a plurality of openings at appropriate intervals in its longitudinal direction, and each The opening is equipped with an opening/closing lid that can only be opened to the inside of the tremie tube, a vibrator is attached to the outer peripheral wall of the lower part of the tremie tube, and a cable extending upward from the vibrator is attached along the tremie tube. Casting equipment for steel pipe concrete columns. [Claim 2] A steel pipe prepared by preparing a tremie pipe having openings at appropriate intervals in the longitudinal direction and each opening having an opening/closing lid that can be opened only inward, and fixed for pouring a concrete column. A tremie pipe is inserted into the tremie pipe from above, and the tip of a flexible hose for supplying concrete is inserted into the opening of the tremie pipe to cause concrete to flow into the tremie pipe and flow out to the bottom of the steel pipe. Pull up the tremie pipe at predetermined intervals, change the opening from the upper part of the tremie pipe to the lower opening, insert the flexible hose, and remove the concrete.
A method for placing a steel pipe concrete column, characterized by placing a concrete column.