JPS5947780B2 - Push-up construction method for buildings - Google Patents

Description

[Detailed Description of the Invention] This invention allows a building to be lifted up and constructed in stages using only a hydraulic jack installed on the ground foundation, without moving it up or down or using a crane. Precast concrete columns and beam support members are placed on multiple jacks installed on the foundation, and after the beam is spanned, several jacks are activated in turn, alternating the length and width of the columns. The feature is that finely divided precast concrete blocks are assembled one by one under columns and beam support members, and are joined to create columns in stages while pushing up the entire structure.

The conventional push-up (jettsuki-up) construction method involves erecting a large number of steel columns in advance, raising hydraulic jacks along these columns using the main force, and pushing up the steel beams with these jacks. However, with this method, the jack body must be moved upward along with the beam members, so when constructing a multi-story building, the jack must be placed on the ground once after the beams on the upper floors are pushed up. Unload,
I had to repeat the process of placing the beam on the floor below on a jack and pushing it up again.

Furthermore, since the above-mentioned steel columns are required, a crane or the like must be used to erect them, and the advantage of the jack-up construction method, which does not require a crane, is significantly impaired.

The present invention solves the above-mentioned disadvantages, and embodiments thereof will now be described with reference to the drawings.

First, as shown in Figure 1, the work procedure is to drive foundation piles 1 into the ground with their heads aligned and aligned on the ground surface, then excavate the basement of the building, and perform temporary construction between the foundation piles 1. Install stand 2.

A thick steel plate 3 as shown in FIG. 2 is installed at the head of the foundation pile 1, and a through hole 4 is provided at each corner of the thick steel plate 3.

Next, as shown in FIG.
A set of hydraulic jacks 5 is installed, a precast concrete column and a beam support member 6 to be located at the column head as shown in FIG. 4 are placed thereon, and a precast concrete beam 7 shown in FIG. 5 is joined to this. One possible joining method is to provide horizontal through-holes 8 and 9 in the columns, beam support members 6, and beams 7, and to pass a prestressed steel element through the holes to tighten the parts.

In this way, first of all, three of the hydraulic jacks 5 are used to push up the column/beam joint member 6, and on the remaining one jack, the columns shown in FIG. 6 are to be constructed vertically and horizontally. One of the finely divided precast concrete block bodies 10 is inserted and this jack is stretched.

Next, by retracting one of the three jacks that were extended earlier, inserting one more block body 10 and extending it, and operating the remaining two jacks in the same way, the horizontally divided portion of the column will be A portion is assembled under the pillar and beam support member, and the entire assembled structure is built up by the vertical width of the block body 10, and the structure is always supported by three of the four jacks.

Furthermore, the jacks are operated alternately in order to create the pillar bodies step by step. By connecting the vertically and horizontally divided block bodies 10 to each other, the horizontal connection is achieved by providing the horizontal through holes 11 and forming the seventh column.
Insert the threaded steel rod 12 as shown in the figure, and tighten the end with the nut 1.
3, and a vertical through hole 14 is provided in the vertical direction to communicate a prestressed steel rod throughout the column in the vertical direction.
It is sufficient to connect the vertical through hole 15 provided in the beam support member 6 to tension the entire body.

At the stage where the above work is completed, the rigid frame structure of the one-story part of the building has been pushed up, but if the purpose is to build a multi-story building, it is necessary to form pillars divided into four parts as shown in Figure 8. The beam support members 16 are assembled one by one, the beams 7 are placed over these, and the columns are successively pushed up and constructed.

In addition, regarding the tensioning method using vertical Brest steel rods, as shown in Fig. 9, the diameter of the vertical through hole 15 provided in the column and beam support member 6.16 is set in two stages: large in the upper part and small in the lower part. In the uppermost column and beam support member 6, a threaded steel rod 17 is passed through the vertical through hole 15 prior to installation on the jack.

This steel rod 17 is fixed to the member by being tightened at an angle of 1-18 degrees 19 at the upper and lower portions, respectively.

Next, when the second beam structure from the top is completed, the first
As shown in Figure 0, a threaded steel rod 20 with a length corresponding to the floor height is
into the vertical through hole 14 of the column from below.

The lower end of this threaded steel rod 20 is connected to a nut 2 as shown in FIG.
1, and by inserting the upper end into the nut 19 in the uppermost pillar/beam support member 6 and screwing it in, prestress in the vertical direction can be obtained.

In this way, by repeating the rigid-frame forming operation, the building is pushed up from the top floor to the next floor, and when installing the top column and beam support member 16 on the thick steel plate 3, The threaded steel rod 20, which is removed one by one and inserted one by one into the four-divided parts, and passed perpendicularly to the pillar on the lowest floor, has a length that projects through the through hole 4 below the thick steel plate 3, The column is fixed to the foundation pile 1 by tightening the nut from the lower surface of the steel plate 3.

As described above, the present invention allows a building to be pushed up using only the hydraulic jack installed on the foundation pile, without using a separate crane or the like, and without moving the jack body up and down.

Furthermore, since the top floor of the building is completed first, deck plates are placed on top of the beams, concrete is poured to create a slab, and this is used as a cover against rain and snow for the construction of the floors below. has the advantage of not being affected by the weather.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the push-up frame method for buildings according to the present invention, and FIG. 3. 4.5. 6. Figure 8 is a perspective view of the main part of the embodiment, and Figure 7. 9.10.11 is a sectional view of the same as above. 1...Foundation pile, 2...Temporary workbench, 3
...Thick steel plate, 4...Through hole, 5...
... Jacket, 6, 16 ... Column, beam support member, 7 ... Beam, 8. 9.11...Horizontal through hole, 10...Block body, 12, 1 Otsu 20
...Screw steel rod, 13.18.19.21...
... Nut, 14.15 ... Vertical through hole.

Claims (1)

[Claims] 1. After placing precast concrete columns and beam support members on multiple jacks installed on the foundation and spanning the beams, several jacks should be activated in turn, thereby forming a column. Pushing up of a building is characterized by building up precast concrete blocks that are divided vertically and horizontally into small pieces one by one under columns and beam support members, and then joining them to push up the entire structure while creating columns in stages. Framing method.