JPH0253591B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A typical method for constructing a chimney is a parallel construction method using a jack up and a post crane.

FIG. 1 shows the construction procedure up to the lower part of the chimney in the construction method, in which a large truck crane 1 is used to install a post crane 5 on the top of the jack up barrel 2, other barrels 3, steel tower 4, and the jack up barrel 2. Set.

Next, the jack up barrel 2 is jacked up to a predetermined height by the jacking device 6 shown in FIG. Accordingly, the other cylinders 3 and 3 steel towers 4 are erected. (Refer to Figure 2) Erection up to the top of the chimney is carried out by repeating the erection using the jack up and post crane.

Figures 3 to 5 show the details of the jack up cylinder 2, as well as the procedure for installing the jack.
8 is a stopper attached to the outer periphery of the divided cylinder; 8 is a push-up support ring made of multiple arc-shaped pieces;
9 is a push-up ring, 10 is a joint between the upper and lower divided barrels, 11 is a guide column, and 12 is a barrel holder.

Then, the push-up support ring 8 is fastened to the lower surface of the stopper 7, and the push-up ring 9 is pressed and engaged with the lower surface of the support ring 8, and the jack up device 6 is operated to move the upper divided barrel along the guide column 11. 2' to a predetermined height, the lower divided cylinder body 2'' is carried in and welded together with the upper divided cylinder body 2'.This joint part 1
0 is completed, the push-up support ring 8 is loosened to release the engagement with the stopper 7, the push-up ring 9 is lowered using the jacking device 6, and the lower divided barrel 2'' is lowered. The jack-up is carried out by engaging the push-up support ring 8 and the push-up ring 9 with the stopper 7'.The jack-up barrel 2 is successively erected by repeating the above-mentioned operations.

Next, construction using the post crane 5 will be explained with reference to FIG.

The jack-up cylinder 2 supports its entire weight on the cylinder holder 12, lifts the divided cylinder 3' with the post crane 5, and then lifts up the divided cylinder 3' and attaches it to the other cylinders 3 that have already been erected.
It is stacked on top and welded. The steel tower 4 is also similarly stacked on the lower steel tower by the post crane 5 and joined by welding or bolts.

Since a large bending moment acts when the post crane 5 is loaded, the inner peripheral surface of the cylinder reinforcing ring 13 fixed to the cylinder cradle 12 and the tower support structure 14 shown in FIGS. By wedged a wooden arrow 15 between the outer peripheral surface of the cylinder body 2 and fixing the jack up cylinder body 2, resistance is converted into horizontal force.

Therefore, in order to prevent the upper part of the cylinder from collapsing when jacked up, a cylinder reinforcing ring 13 fixed to the tower support structure 14 shown in Fig. 6 is set at a certain distance from the outer surface of the cylinder. This is done by the guide roller 16-1.

The guide rollers 16-1 are installed on each support surface A ₁ , A ₂ . . . A ₆ of the steel tower 4, as shown in FIG. Further, the guide roller 16-1 extends from 8 to 16 in the circumferential direction on the cylinder reinforcing ring 13.
It is fixed to a certain extent.

Therefore, it is necessary to arrange a large number of guide rollers 16-1, which requires a large number of man-hours to manufacture, set on the cylindrical reinforcing ring 13, and remove the guide rollers that are the erection jig after the erection is completed. , accompanied by the dangers of high-place removal work.

The present invention has been proposed in order to eliminate such drawbacks, and includes suspending and supporting a barrel guide device so that it can be raised and lowered via a cable by a hoist installed at the top of the barrel to be jacked up. The barrel guide device is fixed to the uppermost structure of the steel tower under construction and the barrel is jacked up.Then, the barrel guide device is removed from the tower structure and lifted and held near the top of the steel tower. This relates to a jack-up construction method for a steel tower type chimney, which is characterized in that the above steps are repeated.

Since the present invention is configured as described above,
Before the top cylinder is jacked up, the cylinder guide device, which is suspended and supported so that it can be raised and lowered via a cable, is set on the top support structure of the steel tower being erected by a hoist installed at the top of the cylinder. Then, while letting out the cable, the barrel is jacked up using the barrel guide device as a guide to prevent the barrel from being inverted and to raise it smoothly, and then the barrel guide device is removed from the support structure. Then, the steel tower is hoisted and held near the top of the cylinder by the hoisting machine, and then the above steps are repeated to construct a steel tower type chimney by the jack-up method.

As described above, according to the method of the present invention, the barrel guide device is placed only in one stage of the uppermost structure of the steel tower under construction, which reduces the number of barrel guide devices manufactured and reduces the installation and removal time. This reduces man-hours and reduces the risk of removal work at high places.

The present invention also provides a barrel guide ring that can be fitted around the jack-up barrel, and a plurality of barrel guide rings that are mounted on the barrel guide ring at intervals in the circumferential direction while maintaining a slight gap on the outer surface of the barrel. A cylindrical body guide device comprising a guide roller and a plurality of hanging cable connectors on the cylindrical body guide ring and is removably attached to the steel tower structure at a cylindrical body support point of the steel tower; A cylindrical guide device for a jack up construction method for a steel tower type chimney, characterized in that the cylindrical body guide device is equipped with a hoisting machine for winding up a rope having one end connected to the hanging rope connector on the cylindrical body guide ring. Accordingly, the above-mentioned jack-up construction method for steel tower type chimneys can be effectively carried out by this device.

The present invention will be described below with reference to the illustrated embodiments.

FIG. 10A shows the state before the cylinder body 2 is jacked up, and the cylinder guide device is suspended and supported via a cable 17 so as to be able to rise and fall by a hoist (not shown) mounted on the top of the cylinder body 2. 16 is set on the first support surface 14-1 of the steel tower 4.

Next, as shown in FIG. 10B, the tube body 2 is jacked up while letting out the cable 17, the lower tube body 2-1 is inserted and connected to the tube body 2, and the first support structure 14-1 is fixed. state.

Next, as shown in FIG. 10C, after lifting the barrel guide device 16 above the steel tower 4-1 to be constructed, the steel tower 4-1 and the second support structure 14 are lifted.
-2 will be erected.

Next, as shown in FIG. 10D, the barrel guide device 1 is installed.
6 is suspended and set on the second support structure 14-2.

Repeat the above steps up to the top of the chimney to obtain the 10th E.
A steel tower type chimney will be constructed as shown in the figure.

FIG. 11 shows a replaceable cylinder guide device 16, in which cylinder guide rings 16-1 are mounted with guide rollers 16-1 at predetermined intervals in the circumferential direction.
2 is removably attached to the mounting seat 31 on the male support metal fitting 29 of the support structure 14-1 of the steel tower via the bracket 16-3, and the cylinder guide ring 1
The rope 17, whose lower end is connected to the suspension rope connector 16-4 on 6-2, is connected to the hoisting machine 19 via a pulley 18 installed at the top of the barrel 2, and is connected to the hoisting machine 19 by the hoisting machine 19. As a result, the barrel guide device 16 is raised and lowered.

12 to 17 show a barrel jack up device using a replaceable barrel guide device 16.

Figure 12 shows the case where the barrel is jacked up from the process of Figure 10D, and in the figure 20
is a jack up device installed on the foundation 21, which supports a plurality of guide columns 22 planted between the first support structure 14-1 of the steel tower 4 and the foundation 21, and each guide column 22.
A jack 23 provided to move up and down inside, a push-up ring 24 loosely fitted around the barrel and supported on the jacks 23, 23, and a stopper 25 with the push-up ring 24 fixed to the outer surface of the barrel. Alternatively, it is constituted by a push-up support ring 27 provided on the push-up ring 24 so as to be coupled to the barrel support ring 26 from below. 28 is a cylinder pedestal on the foundation 21, 29 is each support structure 14-1, 14-2 of the steel tower
a male support metal fitting disposed opposite to the barrel; 3
0 is a female support metal fitting attached to the outer surface of the cylinder support ring 26 so as to be slidably engaged with the same male support metal fitting 29 in the vertical direction; 10 is a weld between the cylinder body 2 and the lower cylinder block 2-2. It is a joining line.

In FIGS. 13 to 16, the male support hardware 2
Reference numeral 9 indicates two ring-shaped bases 29a that protrude rearward.
A mounting seat 3 for mounting the cylinder guide device 16 is formed into a rectangular block shape by welding and fixed to the support structure 14, and is fixed by welding to the upper surface of the block with legs 32.
1. The female support hardware 30 is made up of a pair of shoe-shaped pieces having a curved mounting portion 30a that matches the outer circumference of the barrel support ring 26 and an engagement surface 30b that faces the side surface of the block portion of the male support hardware 29. A bolt 33 is installed on the outer surface of the support ring 26, and a circumferential elongated hole (not shown) drilled in the surface of the mounting portion 30a is fitted into the bolt 33, and the nut 34 is tightened to attach it.

Female support hardware 30 shown in solid line in FIG.
1 shows the state when the steel tower 4 and other parts are erected using the post crane 5 at the top of the barrel 2, and when the jack-up construction of the barrel 2 is completed and the barrel 2 is movably supported by the steel tower in the vertical direction. , and the broken line shows the state in which the gap between the pair of female support metal fittings 30, 30 is widened when the cylinder body 2 is pushed up and erected.

13 and 14 show the barrel guide device 16 attached to the mounting seat 31 on the male support metal fitting 29, and 16-3 is the outer surface of the barrel guide ring 16-2 of the barrel guide device 16. The bracket provided in
16-1 is a guide roller, and 16-4 is a hanging rope connector. FIG. 10D shown above shows the state when the cylinder joining line 10 in FIG. The cylinder body 2 is supported by fitting into a female support metal fitting 30 which is attached to the cylinder body support ring 26 at the same level as the support ring 26. At this time, the steel tower 4 has been erected up to the height of the second support structure 14-2, and the cylinder guide device 16 is placed on the male support metal fitting 29 of the second support structure 14-2 as shown in FIG. is installed.

FIG. 12 shows that from this state, the gap between the female support hardware 30 at the support structure 14-1 level is opened, the push-up ring 24 is engaged with the lowest stopper 25 and pushed up, and the cylinder support ring 26 is placed below it. The lower barrel block 2-2 marked with is inserted and joined and placed on the pedestal 28, the push-up support ring 27 is loosened, and the push-up ring 24 is lowered to a position below the barrel support ring 26. ing. The inner diameter of the push-up ring 24 is similar to that of the barrel support ring 26 as shown at the broken part.
It is larger than the outer diameter.

In the state shown in the figure, the female support hardware 30, 30 is attached to the outer surface of the barrel support ring 26 directly above the push-up ring 24 as shown by the broken line in FIG. The lower surface of the barrel support ring 26 is raised and the lower surface of the barrel support ring 26 is pushed, and the jacking up and erection of the barrel are repeated until the upper support ring 26 reaches the level of the second support structure 14-2. The height of the barrel block that is connected to the lower side of the barrel is such that the upper barrel support ring 26 is at the same height as the second support structure 14-2, and its lower end can be placed on the pedestal 28. Manufactured above ground with adjusted block height.

The upper barrel support ring 26 is connected to the second support structure 14
When the height of −2 is reached, the barrel support ring 2
6. The female support hardware 30 on the outer surface can be fitted with the male support hardware 29 under the barrel guide device 16 shown in FIG. (See Fig. 15) By moving and fixing the female support hardware 30 to the solid line state shown in Fig. 16, the barrel is firmly supported in the horizontal direction at the lower end and at the upper and lower positions of the second support structure 14-2. .

Next, the barrel guide device 16 is attached to the second support structure 14.
Remove from above -2 and use the lifting post crane 5 near the top of the cylinder to construct the steel tower up to the height of the third support structure 14-3.

Upper and lower barrel support rings 26, 26 in Fig. 12
The spacing is between the 5th and 4th support points in Figure 10E.
The spacing is made to match the spacing between A ₅ and A ₄ , and the barrel support rings provided at the bottom below are similarly installed on the ground in order to match the spacing to the lower support points.

Note that FIG. 17 shows how to replace the cylinder reinforcement ring 13 shown in FIG. 6 from the tower support structure 14 to the cylinder body 2. Wedge-shaped rib members 40 are inserted into the gap between the cylinder body 2 and the outer surface of the cylinder body 2 at intervals in the circumferential direction, and the rib members 40 are welded to the inner circumferential surface of the cylinder body reinforcing ring 13 and the outer circumferential surface of the cylinder body 2. . Next, the ring plate pieces 4 are divided in the circumferential direction.
1 and 42 are wrapped around the upper and lower surfaces of the barrel reinforcing ring 13, the outer and inner edges of the ring plate pieces 41 and 42 are welded to the barrel reinforcing ring 13 and the barrel 2, and then the bolts 43 are removed. This completes the replacement of the barrel reinforcing ring 13,
This is the same as the conventional technology.

[Brief explanation of drawings]

Figures 1 and 2 are slope views showing an overview of the implementation of the jack-up construction method for steel tower-type chimneys, and Figure 3 is a front view showing the procedure for constructing the cylindrical body using the jack-up method.
Figures 4 and 5 are an enlarged front view and a vertical cross-sectional view of the main parts, respectively, and Figures 6 and 7 are a vertical cross-sectional view and a cross-sectional plan view of the barrel guide and collapse prevention device during jack-up, respectively. , FIG. 8 is a longitudinal cross-sectional view showing the fixing portion between the cylinder reinforcing ring and the outside surface of the cylinder, FIG. 9 is a front view of the tower-type chimney constructed by the jack up method, and FIGS. 10A to 10E. 11 is a front view showing the steps of an embodiment of the jack-up construction method for a steel tower type chimney according to the present invention, FIG. 11 is a slope view of a replaceable barrel guide device, and FIG. 12 is a diagram showing the implementation status of the method of the present invention. A front view, FIG. 13 is an enlarged view of the part in FIG. 12, and FIG. 14 is a view from the arrow in FIG. 13.
Figure 15 is a front view showing the joint between the barrel support ring and tower support structure, Figure 16 is a view taken from the arrow in Figure 15, and Figure 17 is the barrel attachment part of the barrel reinforcement ring. FIG. 2...Cylinder body, 16...Cylinder guide device, 17...
...Cable, 19...Hoisting machine.

Claims (1)

[Scope of Claims] 1. A cylinder body guide device is suspended and supported via a cable so that it can be raised and lowered by a hoisting machine disposed at the top of the cylinder body to be jacked up, and the cylinder body guide device is attached to a steel tower under construction. The tube body is fixed to the uppermost structural surface and jacked up, and then the tube guide device is removed from the tower structure and hoisted and held near the top of the tube body to construct the steel tower, and the above steps are repeated. The jack-up construction method for steel tower-type chimneys is characterized by 2. A barrel guide ring that can be fitted around the jack-up barrel, and a plurality of guide rollers that are mounted on the barrel guide ring at slight intervals on the outer surface of the barrel at intervals in the circumferential direction. , a tube guide device comprising a plurality of suspension rope connectors on the tube guide ring and detachably attached to the steel tower structure at a tube support point of the steel tower; and a tube guide device disposed on the jack up tube body; A tube guide device for use in a jack up construction method for a steel tower type chimney, comprising a winding machine for winding up a rope whose one end is connected to the hanging rope connector on the tube guide ring.