JP2634271B2 - Jack-up method and device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a jack-up method and apparatus applied for installation in, for example, thermal power generation and other boilers.

[Conventional technology]

As a conventional jack-up method for equipment, there is, for example, a method described in JP-A-62-185964 (Japanese Patent Application No. 61-27969). FIG. 10 is an explanatory view of the method. In the figure, this method is to build a support frame with many columns as shown in Fig. 10, then set only the top beam that has been integrated on the ground in advance to the predetermined position of the top beam, and then try to install it Each device is disassembled into a single unit or a small block, and is lifted to a predetermined place from the ground by a crane or a winch and installed.

[Problems to be solved by the invention]

As described above, in the conventional jack-up method of equipment, after the top beam is installed at a predetermined position, each equipment is lifted by a single unit or a small block and installed at a high place.
In this case, if the top beam and each device can be lifted integrally on the ground in advance, the work will progress.However, the reason why the lifting cannot be performed integrally is that the support frame at the time of lifting is because the cantilever is used. This is because it is unstable and the lifting load is limited. For this reason, work efficiency is low, and work risk is high.

[Means for solving the problem]

The jack-up method according to the present invention is aimed at solving the above-described problem, and a plurality of disassembly columns that can be disassembled for each node are installed at intervals, and both ends of the beam are inserted into the assembly columns, respectively. Both ends of the beam are jacked up by a lifting device mounted on the assembly column while disassembling and restoring the assembly column for each node.

In addition, the jack-up device according to the present invention includes a plurality of assembled columns that are built at intervals from each other and that can be disassembled for each node, beams whose both ends are respectively inserted into the plurality of assembled columns, A lifting device that is mounted on each of the assembling columns and jacks up both ends of the beam.

[Action]

That is, in the jack-up method and apparatus according to the present invention, a lifting device is attached to each of a plurality of disassembled columns that can be disassembled for each node, and the lifting devices are used to remove beams that are respectively inserted into the plurality of assembled columns. Both ends are assembled so that jacks are jacked up while disassembling and restoring columns at each node.Because both ends of the beam are inserted into the assembled columns, eccentric loads on the support frame are eliminated and it is stable, for example, beams and beams It is also possible to jack up the equipment to be installed on the ground beforehand.

〔Example〕

FIG. 1 to FIG. 9 are illustrations of a jack-up method for equipment according to one embodiment of the present invention. In the figure, the jack-up method for equipment according to the present embodiment is applied to the installation of a boiler for thermal power generation, and first, as shown in FIG.
The assembling columns 1 and the truss girder 2 are assembled on the ground to build a support frame. Next, as shown in FIG. 2, both ends of the top girders 3 are removed and inserted into the four-assembly columns 1 of the support frame, and the top girders 4 are fixed to the top girders 3 and then inserted. Attach the hanging bar receiver 5 to Next, as shown in FIG. 3, four top beams 4 pre-assembled on the ground are lifted from the middle floor by a winch and a wire installed in the middle of the four assembling columns 1, and jack-ups are provided under the top girders 3. Attach the rod support 6. Also,
A temporary roof 7 for rainwater protection is mounted on the upper part. Then, as shown in FIG. 4, a jack-up device 8 is attached to the top of the four-post assembly column 1, and the four jack-up rods 9 are inserted into the four-post assembly column 1.

After setting in this manner, the top beam 4 is gradually lifted by the jack-up device 8 while the brace 10 and the joint material inside the four-assembly column 1 are sequentially removed and restored as shown in FIG. Attach the equipment hanging rod 11 to the beam 4. Next, as shown in FIGS. 6 to 8, the upper part 12, the middle part 13, and the lower part 14 of the equipment are installed while lifting the top beam 4. As shown in FIG. 6 (b), the truss girder 2 indicated by a dotted line in the front direction is obstructed when the top beam 4 is lifted, so it is removed and attached after the top beam 4 is lifted. Since the four assembling columns 1 are reinforced by the steel frame outside the truss girder 2, overturning is prevented. In addition, the brace 10 inside the four-piece column 1 indicated by the chain line is removed only when the top girders 3 pass. Each part 12, 13 and 14 of the equipment is made into a small block, carried into the support frame from the opening of the truss garter 2, and assembled into a middle block. Then, as shown in FIG. 8, the top beam 4 is set at the top level, the support beam 15 of the top beam 3 is mounted at a specified position, the top beam 3 is jacked down, and the jack up rod receiving beam 6 is moved. Remove. Finally, the ninth
As shown in the figure, the jack-up device 8 is removed, and the temporary roof 7 is also removed.

In the conventional supporting frame shown in FIG. 10, the eccentric load is applied to the supporting frame due to the multiple columns being cantilevered during lifting, and the supporting frame becomes unstable, and the load during lifting is limited. In the above, the eccentric load is not applied to the supporting frame by inserting the top girders 3 into the four-assembly columns 1, and the top beam 4 and each device installed on the top beam 4 are jacked up integrally and installed. Becomes possible. As a result, the support frame can be installed on the ground, and the period from the upright to the start of installation of the device can be shortened. In addition, since the installation work of each device can be performed on the ground, the work efficiency is improved, and the work is stable and safe. In addition, since the temporary roof 7 can be installed above the top beam 4 when assembling on the ground, work in rainy weather becomes possible, and the installation process can be shortened. In addition, although the jack-up device 8 for lifting the top beam 4 and each device as a whole is required, the conventional construction method does not require a device such as a large crane or a winch for lifting a single device or a small block.

〔The invention's effect〕

The jack-up method and apparatus according to the present invention are as described above, and it is possible to jack up the beam and each device to be installed on the beam integrally on the ground in advance,
The work efficiency is improved and the danger of the work is reduced.

[Brief description of the drawings]

1 to 9 are explanatory views of a jack-up method for equipment according to an embodiment of the present invention, and are shown in FIGS. 1 (a), 2 (a), 3 to 5 and 6, and FIGS. (A), FIG. 7, FIG. 8 (a), FIG. 9 (a) are side views of the support frame, FIG. 1 (b) and FIG. 9 (b) are front view, FIG. b), FIG. 8 (b) is a plan view, FIG. 1 (c) is a sectional view taken along line cc in FIG. 1 (a), and FIG. 6 (b) is a sectional view taken along line bb in FIG. FIG. 10 is an explanatory view of a conventional jack-up method for equipment, wherein FIG. 10 (a) is a front view of a support frame, FIG. 10 (b) is a side view, and FIG. 10 (c) is a plan view. 1 ... 4 pillars, 2 ... truss girder, 3 ... top girders, 4 ... top beams, 5 ... hanging rod beams, 6 ... rod beams, 7 ... temporary roof, 8 ... Jack-up device, 9… Rod, 10… Brace, 11… Equipment hanging rod, 12 …… Equipment upper part, 13 …… Equipment middle part, 14 …… Equipment lower part, 15 …… Support beam.

Claims (2)

(57) [Claims] 1. A plurality of assembled columns that can be disassembled for each node are spaced apart from each other, and both ends of the beam are inserted into the assembled columns, and the assembled columns are disassembled and restored for each node. A jack-up method, wherein both ends of the beam are jacked up by a lifting device mounted on the assembly column. 2. A plurality of assembling columns which are spaced apart from each other and can be disassembled at each node, a beam having both ends inserted into the plurality of assembling columns, respectively, and mounted on the plurality of assembling columns respectively. A jack-up device comprising a lifting device for jacking up both ends of the beam.