JPH089917B2 - Construction method of steel tower supported chimney - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a method for constructing a steel tower supported chimney.

(Prior art) Conventionally, in this type of erection method, the tower part is erected with the track crane to a height where it can be erected with the track crane, and the higher part is the tower tower method, the side tower method, the erector method, etc. The part and the barrel part were installed.

9 to 11 show the erector method among the above-mentioned methods, in which the steel tower (b) is erected up to a height H that can be erected by the track crane (a) (see FIG. 9). Ten
As shown in the figure, the erector (c) is installed, and the upper tower portion that cannot be erected by the truck crane is erected by the erector.

Next, attach the lifting wire (d) to the top of the tower,
The cylinder blocks (e) are sequentially inserted into the lower side of the steel tower, welded to the upper cylinder blocks and lifted, and the cylinder body (f) is erected. (Refer to FIG. 11) (Problems to be solved by the invention) A special device called an erector is required for the erector method, a jack up device is used for the jack up method, and a tawer wrench is used for the side tower method. There are areas where it is difficult to arrange.

In addition, in each of the above-mentioned construction methods, the tower is built up with a truck crane, the truck crane is used in the initial stage, and then a special construction method is applied, so a device other than the truck crane is required. It will be higher than if installed alone.

(Means for Solving Problems) The present invention has been proposed in order to solve such problems, and a cylindrical block is hoisted by a hoisting wire to a low-rise tower section erected on the ground. And a joint of the lower end cylinder block is overturned to construct a cylinder projecting above the low-rise steel tower part, and then a track crane is used to fix the steel tower part of the first layer to the cylinder body in the sky. Then, the tubular body to which the steel tower portion of the first layer is fixed is lifted up by the lifting wire, and subsequently, the connection of the steel tower portion of the lower layer to the steel tower portion of the first layer and the lifting of the tubular body. It is characterized by repeating and.

(Operation) In the present invention, as described above, while the cylinder block is hung from the low-rise tower erected by the track crane, the lower cylinder block is inserted into the tower and is connected to the upper cylinder block. Then, a tube body projecting upward from the low-rise steel tower is constructed by reversing the above-mentioned operation, and then the steel tower portion of the first layer is fixed to the cylinder body in the sky by a truck crane to form the same cylinder. Along with raising the body, a new cylinder block is joined to the lower end of the barrel, and then a steel tower part of the second layer is joined below the steel tower part of the first layer to raise the cylinder body. , A new cylindrical block is connected to the lower end of the block, and the same operation as described above is repeated to construct a tower supporting chimney.

(Example) Hereinafter, an illustrated example in which the present invention is applied to the construction of a single-cylinder 8-layer tower-supporting chimney will be described.

The steel tower part is erected to a height before the range (H) where it can be erected by the truck crane (1). (Refer to FIG. 1) A hoisting wire (3) was charged on the top of the low-rise tower part (2) thus constructed, and the tubular block (4)
Hoist. (See FIG. 2) Further, the barrel block (4) is inserted into the lower part of the steel tower part (2), the welding to the barrel block at the lower end and the lifting of the barrel are repeated to erect the barrel (5). To do. (Refer to Fig. 3) Next, the track crane (1) was used to construct the steel tower member (6
Lift A) and fix it to the barrel (5) in the air. (4th
(See the figure) Next, the cylinder body (5) is lifted while the first layer steel tower member (6A) is fixed to the cylinder body (5), and the cylinder block (4) is inserted from the lower end of the steel tower part (2). Weld the bottom of the barrel and lift the barrel. (Refer to FIG. 5) Then, the track crane (1) lifts the steel tower portion (6B) of the second layer below the steel tower portion (6A) of the first layer,
Connect. (Refer to FIG. 6) Then, while the steel tower portions (6A) and (6B) of the first layer and the second layer are fixed to the tubular body (5), the tubular body (5) is hung up, and the tubular block is carried out in the same manner as described above. (4) is inserted and connected, and the cylinder body is lifted. (See FIG. 7) Next, the track crane (1) is used to hang and erect the steel tower portion (6C) of the third layer below the steel tower portion (6B) of the second layer. (Refer to FIG. 8) Hereinafter, the steel tower and the barrel are erected by repeating the setup of lifting the barrel, attaching the steel tower portion, and lifting the barrel.

(Effects of the Invention) As described above, according to the present invention, the low-rise steel tower is erected above the ground by reversing the suspension of the cylindrical block and the joint of the lower-end cylindrical block with the wire for lifting. A tubular body projecting upward from the upper part, and then, by means of a truck crane, in the sky, the first layer steel tower portion is fixed to the tubular body, and then the first layer steel tower portion is fixed to the tubular body. It is lifted up by a hoisting wire, and the connection of the lower tower part to the first tower part and the lifting of the tubular body are reversed. It is sufficient to use only the lifting wire and winch commonly used for
There is an effect that it is possible to construct a high-rise tower-supporting chimney with a small truck crane without the need to arrange special equipment such as a jack.

Although the present invention has been described with reference to the embodiments, the present invention is of course not limited to such embodiments, and various design modifications can be made without departing from the spirit of the present invention. .

[Brief description of drawings]

1 to 8 are front views showing steps of an embodiment of a method for constructing a steel tower supported chimney according to the present invention, and FIGS. 9 to 11 are front views showing steps of a conventional erector method. . (1) …… Truck crane, (2) …… Low-rise tower part (4) …… Cylinder block, (5) …… Cylinder (6A) …… First layer tower member

Claims (1)

[Claims] 1. A tubular body projecting above the low-rise steel tower section by reversing the suspension of the tubular block and the joining of the lower-end tubular block with a lifting wire in the low-rise steel tower section installed on the ground. Then, by using a truck crane, the steel tower portion of the first layer is fixed to the cylinder body in the sky, and then the cylinder body having the steel tower portion of the first layer is fixed by the lifting wire. The method of erection of a chimney supporting a steel tower, wherein the connection of the steel tower portion of the lower layer to the steel tower portion of the first layer and the raising of the tubular body are reversed.