JP3079329B2 - Push-up method with composite jack for push-pull - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push-up method applied to the construction of a high-rise building, and more particularly to a push-up method by interlocking a plurality of push-pull composite jacks prepared in a series of vertical arrangements along the pillars of the building. Concerning the construction method.

[0002]

2. Description of the Related Art Conventionally, as a construction method of a building, a so-called lift-up method or a push-up method (hereinafter, referred to as a push-up method) for pushing up or pulling up a roof frame or a floor frame of a building along columns. ) Has been developed and widely used (see, for example,
128038). Of course, various jacks that enable the push-up method have been developed and put to practical use.

[0003]

One of the main objects of the push-up method is to shorten the construction period. However, the effective stroke of the jack device used in the conventional push-up method is limited by various constraints on the mechanical design and economic constraints (for example, the price of the jack is determined by the length of the cylinder, and the stroke of one floor is equivalent to the stroke). Is very expensive.), And is limited to about 1 m, which means that the height of the building is usually 2.5 m.
It's also pretty short for that. Therefore, it takes a long time for the so-called direct productive expansion and contraction steps to lift the lifted body such as the roof frame or floor frame by jack, or to raise or to self-down, which is a bottleneck in shortening the construction period. ing. More specifically, in order to push up the floor frame structure by the height of one floor of the building, it is necessary to perform the step of extending and retracting the jack about three times. In the meantime, it is necessary to attach a reaction force plate to the pillar in advance in the vertical direction at the pitch of the effective stroke of the jack by welding. Then, the jack hangs a lock pin on the reaction force plate of the pillar to perform an extension or contraction operation, releases the lock pin from the reaction force plate, and performs several unproductive expansion and contraction steps of changing the load. Since the repetition requires a long time for such repetition, which is a bottleneck in shortening the construction period, this is a problem to be solved.

[0004]

As a means for solving the above-mentioned problems of the prior art, a push-up method using a composite push / pull jack according to the present invention is shown in FIGS. And a plurality of cases such as first and second (or third and fourth) ascending and descending along the pillar 1 of the building.
Assembling the push / pull jacks 2, 3 in a vertical relationship, and assembling and erection of the top floor 4 of the building on the upper base 2 a of the first push / pull jack 2; The reference floor (N floor) 5 fixed to 1 is assembled as a permanent floor, and one floor above (N +
Assembling the floor 6 of the (first floor), the N + 1 floor 6 is connected to the lower base 3b of the second push / pull jack 3, and the joint operation of the first and second push / pull jacks 2, 3 After the top floor 4 is pushed up by at least the height of the building and the top floor 4 is fixed to the pillar 1, the first and second jacks 2.3 are operated one floor above the reference floor 5 as a joint operation. The upper floor (N + 1 floor) 6 is pulled up, the floor 6 is fixed to the pillar 1 at its regular position (N + 1 floor) to form a permanent floor, and the second push-pull jack 3 The main floor 6 is separated from the main floor 6, and a floor 7 two floors higher than the reference floor 5 (N + 2 floor) is assembled on the main floor 6, and the N + 2
Connecting the floor 7 and the second push-pull jack 3;
Hereinafter, the first and second push / pull jacks 2 and 3 cooperate to push up the top floor 4, raise the floor 7 above the reference floor 5, and at the normal position, the N + 2 floor 7. Is fixed to the pillar 1 and the process of forming a permanent floor is repeated.

[0005]

[Function] The top floor 4 is used as a roof during construction of a building to realize an all-weather working environment for the building. A series of first and second push / pull composite jacks 2, 3 vertically
As a result of the joint expansion and contraction operation, the actual expansion and contraction stroke is several times as large as the product of the number of connected and pushed composite jacks and the original effective stroke of each jack. A substantial stroke (approximately 2.5 m) can be easily realized. As a result, it is sufficient to provide a relatively small number of reaction force receiving portions 28 (FIGS. 7 to 9) of the column 1 required for the step of extending and retracting the jack.
In addition, the operation of pushing up and pulling up each floor of the building can shorten the required time by saving unnecessary time by the extension of the expansion and contraction step.

The push-up of floors 6 and 7 on each floor of the building is as follows:
Efficient operation is achieved by combining the lifting and lifting operations of the composite jacks 2 and 3.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Fig. 1 shows the initial stage of the push-up method,
The main pillars 1 and 1 of the building to be built are built, and the reference floor 5 fixed to the pillars 1 and 1 (however, the reference floor (N floor) here is the first floor above ground, Or, in the case of the lowest floor of the basement, or in the case of the multi-layer composite construction method, it means the superframe floor that divides each construction area layer on the ground. The same shall apply hereinafter.) A first push / pull composite jack 2 which ascends and descends along the column 1 on the column 5 is assembled, and a second push / pull composite jack 3 is arranged below the push / pull composite jack 2 in a series. FIG. 2 shows a stage in which the top floor 4 of the building is assembled on the upper base 2a of the first push-pull composite jack 2 after that. The top floor 4 is installed on the left and right pillars 1 and 1 (however, the number of pillars 1 is not limited to the two shown in the illustrated example, but refers to all of the permanent pillars on the building plane. The same applies hereinafter). The first push / pull jacks 2, 2 are installed substantially horizontally. The second push / pull composite jack 3 and the first push / pull composite jack 2 are connected to each other in a mutually abutting mount 9 to form a series of relationships.
It is configured to jointly expand and contract. After all the above preparations are completed, the floor 6 on the reference floor 5 and one floor above (N + 1 floor) is assembled. The N + 1 floor 6 is constructed as a RC flat slab by assembling reinforcing steel, casting concrete, and forming S by steel members.
PC made of concrete or precast concrete
It is assembled with a lower frame 3b of the second composite jack 3 for pushing and pulling.

FIGS. 7 to 9 show examples of the first and second composite jacks 2 and 3 for pushing and pulling. In summary, a total of four (but not limited to) radii of jacks 12 arranged in parallel (perpendicular) along the vertical column 1 on which the lifting / lowering operation is based are mounted on the cylinder 12a.
The lower end of the output shaft 12b is connected to the lower bracket 14 of the upper gantry 2a by the hinge pin 22.
Are connected by As shown in FIG. 9, the upper and lower mounts 2a and 2b are
And is configured to have a sufficient and sufficient strength and rigidity to easily place a load to be lifted such as the (N + 1) th floor 6 above. By the way, in the case of this embodiment, the column 1 has an outer diameter of 50.
It is a steel pipe column of about 0 mm, and the steel material 15 constituting the upper and lower gantry 2a, 2b is a welded steel material of about 350 mm in length and about 2000 mm in length. As the other steel material 16, an H-section steel having a length of about 1800 mm and a number of reinforcing ribs of about 700 mm is used. The jack 2 (and 3) has a cylinder outer diameter of about 220 mm, an effective stroke of about 1000 mm, and a capacity of 50 tons. The lower surface of the steel material 16 in the upper gantry 2a and the steel material 1 in the lower gantry 2b
A drive unit (hydraulic cylinder) 10 for a guide roller 25 that rolls while contacting the outer surface of the column 1 at a substantially right angle is installed on the upper surface of the support 6, and the tip of a support arm 17 that is driven by the drive unit 10 to move forward and backward in the horizontal direction. A guide roller 25 is attached to the section. A plurality of guide rollers 25 abut in a symmetrical arrangement on both sides of the column 1 at an angular position where a later-described reaction force receiving portion 28 is not installed (FIG. 9). The guide roller 25 can cope with the size of the outer diameter of the column 1 or the shape of the horizontal cross section (whether it is circular or square) by the advance and retreat of the support arm 17 by the drive unit 10. The upper lock pin device 26 and the lower lock pin device 2 that take a reaction force on the reaction force receiving portion 28 of the column 1 are provided at the upper and lower pedestals 2a and 2b, particularly at substantially the center of the steel material 15.
7 are installed inward in the horizontal direction. The lock pin devices 26 and 27 in the upper and lower parts are installed in a pair symmetrically with the steel materials 15 and 16 located on both sides of the column 1 in the center, and two pairs are installed vertically one by one. Lock pin device 2
6, 27 have a height of 100 mm, a width of 180 mm, and a length of 4
A lock pin 26a formed as a 50 mm rectangular steel material,
27a is slidably housed in cylinders 26b, 27b facing inward. The lock pin 26
The wedge-shaped block 29a of the clamp jack 29, which is a drive unit, is laterally combined with an inclined surface formed at the rear end surface of the wedge-shaped block 29a.
Moves forward into a locked state (see the upper part of FIG. 9),
It retreats to the unlocked state (see the lower part of FIG. 9). In this case, a restoring force larger than the slide resistance is always applied to the lock pins 26a and 27a by a spring device (not shown). Therefore, the lock pin 2
As long as 6a and 27a can be disengaged, the reaction force receiving portion of the column 1 can be either a convex portion or a concave portion. In the case of this embodiment,
In the column 1, in the vertical direction of the angle position at which the lock pins 26a, 27a of the lock pin devices 26, 27 advance and retreat, the thickness is about 50 mm and the width is about 180 mm at a pitch assuming the maximum effective stroke of the cylinder 12. A reaction force receiving portion 28 is provided in which the steel plate is fixed by welding.

The above-described composite jack device 2 for pushing and pulling.
The method of using (and 3) is as follows. A steel material 1 in which a guide roller 25 and lock pin devices 26 and 27 are previously installed as factory processing.
The upper and lower pedestals 2a and 2b are assembled by bolting the bolts 5 and 16 into the site, assembled in a girder shape around the column 1, and the jack 12 is inserted and connected between the upper and lower pedestals 2a and 2b. Easy installation work. Of course, by performing the reverse procedure, the disassembly operation can be facilitated. After the preparation of the above-described push-up method is completed, the composite jack devices 2 and 3 first drive the lower lock device 27 to lock the lock pin 27a on the reaction force receiving portion 28 of the column 1, and The lifted body is pushed up by causing the jack 12 to extend. The upper gantry 2a is guided by the guide roller 25, and smoothly and stably performs an ascending operation without causing a lateral shake or the like. When the jack 12 has been fully extended to its effective stroke, the upper lock pin device 26 is driven to lock the lock pin 26a on the reaction force receiving portion 28 of the column 1 to change the load. That is, the jack 12
Is slightly contracted, the entire load is supported by the upper lock pin device 26, and the lower lock pin device 27 is in a no-load state. At this stage, the clamp jack 29 serving as the driving unit is retracted, and the lock pin 27a is moved. It is retracted toward the front from the reaction force receiving portion 28. Thereafter, when the jack 12 is contracted, the lower gantry 2b is raised. Therefore, if the object to be lifted is connected to the lower base 2b, it will be lifted. At the stage where the jack 12 has contracted all of its effective stroke, the lower lock pin device 27 of the lower base 2b is actuated to take a reaction force on the reaction force receiving portion 28 of the column 1, returning to the initial state and returning to the initial state. (The expansion and contraction operation of the jack 12) ends.

The ascending step (and therefore the descending step) of the composite jack devices 2 and 3 can be automatically controlled by a hydraulic control circuit that is controlled in a sequence. Further, in the implementation of the push-up method of the present invention, since the jack uses the gusset plate of each floor for the reaction force receiving portion, it is not necessary to attach the reaction force receiving portion 28 to the column 1.

Referring back to the description of the embodiment of the push-up method, FIG. 2 shows that the first and second push-pull composite jacks 2, 3 are operated as a series of joint operation (extending operation) from the stage of FIG. The top floor 4 is pushed up by the height corresponding to one floor, and then the top floor 4 is fixed to the pillars 1 and 1 (this can be fixed by the upper lock pin device 26 of the jack 2). Is shown. Regarding the columns, a lifting machine such as a wrecker (not shown) is installed on the top floor 4 and the steel columns are successively added.

FIG. 3 shows that, after the strength of the cast concrete of the N + 1 floor 6 built as a flat slab, for example, the top floor 4 fixed to the column 1 as described above reacts to the first floor, and Then, the second push / pull composite jacks 2, 3 are jointly contracted in a series to raise the N + 1 floor 6, thereby positioning the N + 1 floor 6 at the proper position on the N + 1 floor, and fixing it to the pillars 1, 1 and permanently installing the same. Completed as a floor and its N
The + 1st floor 6 and the second composite jack 3 for push and pull are cut off and separated.

FIG. 4 shows the assembling of the floor 7 on the (N + 1) th floor 6 and one floor above (N + 2th floor). The N + 2th floor 7 is used for the second push-pull composite jack 3. The stage where it was combined with the lower base 3b is shown. FIG. 5 shows a stage in which the top floor 4 is again pushed up by the height corresponding to the floor height by a series of joint extension operations of the first and second push-pull composite jacks 2 and 3, and the top floor 4 is fixed to the pillar 1. Is shown.

FIG. 6 shows that after the strength of the N + 2 floor 7 has developed, a reaction force is applied to the top floor 4 to cause the first and second push-pull composite jacks 2 and 3 to jointly contract to the N + 2 floor.
The floor 7 is pulled up, positioned at the N + 2 floor regular position, fixed to the pillar 1, and the N + 2 floor 7 is completed as a permanent floor. Thus, the push-up method of the present invention repeats the steps shown in FIGS. 3 to 6 to advance the building to a predetermined number of floors.

[0015]

According to the push-up method using the push / pull composite jacks 2 and 3 according to the present invention, the lock and release in the expansion and contraction step of the jack and the waste of the work time associated therewith are eliminated and the construction period is shortened. It greatly contributes to shortening of construction time and efficiency of construction.

[Brief description of the drawings]

FIG. 1 is an elevational view showing an initial stage of a push-up construction method.

FIG. 2 is an elevational view in which a top floor is pushed up.

FIG. 3 is an elevation view in which an N + 1 floor is a permanent floor at a regular position.

FIG. 4 is an elevational view of a stage where an N + 2 floor is assembled.

FIG. 5 is an elevational view in which the top floor is pushed up.

FIG. 6 is an elevation view in which the N + 2 floor is a permanent floor.

FIG. 7 is a front view of the composite push / pull jack.

FIG. 8 is a side view of the left half of the jack in section.

FIG. 9 is a plan view showing a cross section of the upper half of the jack.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pillar 2 1st push-pull composite jack 2a Upper frame 4 Top floor 5 Reference floor 3 Second push-pull composite jack 6 N + 1 floor 3a Lower frame 7 N + 2 floor

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiromichi Yamada 8-21-1, Ginza, Chuo-ku, Tokyo Inside Takenaka Corporation Tokyo Main Branch (72) Inventor Yoshiteru Iwasa 2-5-1 Minamisuna, Koto-ku, Tokyo No. Takeuchi Corporation Technical Research Institute Co., Ltd. (72) Inventor Eiji 2-14-14 Minamisuna, Koto-ku Tokyo No. 14 Takenaka Corporation Technical Research Institute (72) Inventor Yoshinori Kukino 2--14 Minamisuna, Koto-ku, Tokyo Inside Takenaka Corporation Technical Research Institute (72) Inventor Takumi Fujii Minamisuna, Koto-ku, Tokyo 2-5-1-14 Takenaka Corporation Technical Research Institute (72) Inventor Hiroyuki Nishimura 2-5-1-14 Minamisuna, Koto-ku, Tokyo Takenaka Corporation Inside the Technical Research Institute (72) Inventor Hiroshi Kibayashi 2-5-14 Minamisuna, Koto-ku, Tokyo Inside the Technical Research Center Takenaka Corporation (56) References JP-A-3-87439 (JP, A) JP-A Heihei 2-128038 (JP, A) JP-A-55-142848 (JP, A) JP-A-50-86121 (JP, A) JP-A-4-221141 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04B 1/35 E04G 21/14

Claims (1)

(57) [Claims] 1. A first and second push / pull jacks ascending and descending along a pillar of a building are assembled in a vertical relationship in a series, and a top floor of the building is placed on an upper base of the first push / pull jack. Assembling and erection of the floor, assembling a reference floor fixed to the pillars as a permanent floor, and assembling a floor one floor above the reference floor, the floor being the second push-pull jack; After the step of coupling with the lower frame of the first and second push-pull jacks, the top floor is pushed up by at least the height of the building as a joint operation, and the top floor is fixed to the pillar, A step of raising the floor one floor above the reference floor as a joint operation of the second jack, fixing the floor to a pillar at its proper position to form a permanent floor, and a second push-pull jack. Separate from the permanent floor one floor above the reference floor, and And assembling a floor two floors above the reference floor, coupling this floor with the second push-pull jack, and pushing up the top floor by the joint operation of the first and second push-pull jacks. And a process of raising the floor two floors above the reference floor, and fixing the floor to a pillar at a regular position to form a permanent floor, and a push-up method using a composite jack for push-pull. .