JP2854389B2 - Steel construction method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a steel frame construction method suitable for a high-rise or long-sided building that can be realized only with a small crane.

"Conventional technology" Conventionally, steel frame construction in a high-rise or long-sided building can be done while climbing a tower crane while corresponding to a height that gradually increases, or on the other hand, it can correspond to a long-sided building In the mobile crane method, the boom is added as the height of the building increases, or the model is changed to a large crane for construction.

"Problems to be solved by the invention" With the conventional technology, in both cases of using a climbing crane and a mobile crane, the crane must be installed outside the building, Requires extra space for crane installation and foundation work for the crane equipment or ground curing.However, most of the sites are often congested due to densely populated buildings. In some cases, it is not possible to secure a large crane, and in the case of a large crane, the fact is that the installation becomes even more difficult.

Even if locational requirements are satisfied, the crane length will increase due to climbing and boom extension as the construction progresses. As a result, a large crane base that can be applied to the size of the completed building must be installed from the beginning.

On the other hand, in the case of a large crane, the crane is initially operated with unnecessary functions.

As described above, there is inconvenience and irrational operation of the crane in the steel frame construction of a high-rise or long-sided building.

The present invention provides a steel frame construction method that does not require a separate space for crane installation in addition to the building site, and that the required crane can be a small crane that can correspond to the small block under construction. It is intended to be.

"Means for Solving the Problems" In order to achieve the above object, in the steel frame construction method of the present invention, after the steel frame of the low-level block is erected with a small mobile crane, After laying travel rails, a small tower crane is installed inside the rails, and the tower crane is driven to move the steel frame of the upper block to the main building except for the top end located on the tower crane's movement line. After the crane is moved, the beam is removed in a manner that will be retrofitted, and then the tower crane is climbed via a temporary temporary support beam at the upper end of the upper block, and the traveling rails are repositioned to move the tower crane to the upper block floor This procedure is repeated, and the procedure is repeated to form a steel frame of a building having a desired floor and a desired long side.

[Operation] When a steel frame is erected by the method configured as described above, first, the base low-level blocks are erected by a small mobile crane, and then the upper blocks are sequentially small and mobile towers. The crane will be able to climb and build while being relocated to the upper floor.

Since the existing frame is used as an installation base and a traveling path for the crane for the upper block construction, there is no need to separately install a crane and secure a traveling space outside the building site.

In addition, since the tower crane moves and climbs, it is reasonable that the tower crane is effective only in an extremely narrow working range.

"Example" An example will be described with reference to the drawings.
FIG. 2 shows an embodiment of a high-rise or long-sided building in which the upper end is stepped.

The low-rise block 2 in the steel frame 1 of a high-rise or long-side building is first constructed by a small mobile crane (not shown).

Next, as shown in FIG.
The traveling rail 3 is laid on the upper part, and the small tower crane 4 is mounted thereon, that is, installed inside. In the drawing, only the laying rail 3 is partially laid. Since the tower crane 4 is movable, it is possible to build the steel frame of the upper block 5 in the same manner as the above-described low-layer block 2. At this time, as shown in FIG. 2b, the tower crane 4 is mounted on a crane so that the tower 4a of the tower crane 4 is not blocked by the main beams 6, 6 'of the block being moved. It must be done in a manner that will be added after 4 has moved. However, since the uppermost permanent beam 6 'blocks the traveling of the crane 4 which has been relocated to the upper floor, which will be described later, it must not be retrofitted.

When the steel construction of the upper block 5 is completed, a temporary receiving beam 7 is temporarily installed on the upper end of the block 5 as shown in FIG. 2a, and the turntable 4b attached to the tower 4a is hooked on this. Then, the tower 4a is climbed upward while taking a reaction force, and the rail 3 laid on the block 5 is changed to the upper floor, and the crane 4 is changed to the upper floor. At this time, since the beam 6 'at the uppermost end of the block 5 is not provided as described above and the frame is unstable, it is preferable to provide a temporary beam (not shown) and to reinforce at least the climbing portion. . The crane 4 replaced in the block 5 constructs the upper block 8 in the same manner.

 Hereinafter, this step is repeated upward.

FIG. 1 shows the process of changing the crane 4. When the construction of the top floor is completed, the crane 4 is dismantled by a dismantling crane (not shown). It should be noted that the supply of materials to the cranes 4 which are sequentially rearranged upward may be performed via a lifting device (not shown) installed in the existing frame.

[Effect of the Invention] Since the present invention is configured as described above,
The following effects are obtained.

(1) The steel frame construction of a high-rise or long-sided building can be achieved without having to secure a crane installation space outside the building site.

(2) The steel frame construction of a high-rise or long-sided building can be achieved with only a small crane without any need for a large-scale crane.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a crane reordering process of the method of the present invention in a high-rise or long-sided building when the upper end is stepped. FIGS. 2a and 2b show crane reordering means in the method of the present invention. FIG. 1 ... steel frame, 2 ... low-level block, 3 ... travel rail, 4 ... tower crane, 4a ... tower crane,
4b: turntable, 5: upper block, 6, 6 ': permanent beam, 7: temporary beam, 8: upper block.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hiroyuki Kono 10-10 Hashimotocho, Naka-ku, Hiroshima-shi, Hiroshima Takenaka Corporation Hiroshima Branch (56) References JP-A-48-78727 (JP, A) JP-A-48-54727 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E04G 21/14-21/18

Claims (1)

(57) [Claims] After a steel frame of a low-level block is built with a small mobile crane, a traveling rail is laid on the low-level block, and a small tower crane is installed on the rail. The main building beam other than the uppermost one located on the movement line of the tower crane is installed in a manner that will be retrofitted after the crane has been moved. The tower crane is climbed via the temporary support beam and the traveling rails are rearranged, and the tower crane is rearranged to the floor of the upper block. This procedure is then repeated to determine the steel frame construction of the desired floor and the desired long side building. A steel frame construction method characterized by the fact that it has been done.