JP3732586B2 - Method and apparatus for constructing steel structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a so-called push-up method in which a steel structure is constructed from the top floor near the ground and is sequentially pushed up and constructed.
[0002]
[Prior art]
Conventionally, in order to construct a middle- and high-rise steel structure, it was usually constructed sequentially from the lower floor. However, there was a situation where work was delayed depending on the weather, and it was almost impossible to work at high places in bad weather.
For these reasons, recently, in order to reduce dangerous high-altitude work and to provide a construction environment that is not affected by the weather, steel structures are constructed from the top floor near the ground and are built up sequentially. Various construction methods have come to be adopted.
The main ones are lift-up method, jack-up method, push-up method and the like. Each construction method employs various construction methods depending on the work environment, but these representative ones will be briefly described.
[0003]
FIG. 3 shows a typical example of what is called a lift-up method. This is a device that raises the prefabricated rooftop floor RF as the construction progresses, and is composed of a lift-up device, a hydraulic device, and a control device. As for the rise of the roof floor RF, the rectangular pins provided in the pair of upper and lower base frames 25A and 25B are respectively provided in the pin holes 27 formed in the posts 24 as shown in FIG. The internal cylinders 26, 26 are expanded and contracted while removing and attaching, and this is performed by a measuring operation.
After the construction of the first and second floor portions 1 and 2F as shown in FIG. 3A, a lift-up device comprising a pair of posts 24 and a jack device 25 attached to these posts 24 is installed. Next, the roof floor RF is constructed on the jack device 25 as shown in FIG. Further, the roof floor RF is sufficiently raised by the measuring operation of the jack device 25 as shown in FIG. 3 (C), and between the roof floor RF and the first and second floor portions 1 and 2F as shown in FIG. 3 (D). In 3rd floor part 3F is constructed. Next, the roof floor RF is lifted down as shown in FIG. 3 (E) to move the base portion of the pair of posts 24 to the third floor, and the roof floor RF is sufficiently raised as shown in FIG. 4th floor part 4F is constructed between RF and 3rd floor part 3F. Hereinafter, this is sequentially repeated to construct a medium-high-rise structure.
As a result, the construction of each floor can be carried out sequentially under the rooftop floor, so that construction work can be performed safely and with a short construction period by realizing work that is not affected by the weather. However, in this construction method, all the loads when the roof floor RF including the lift-up device is raised must be supported on the floor of the structure, and the burden is large. In addition, the basic part of the post in the lift-up device has to be sequentially transferred to the floor of the upper floor, which increases labor, cost, and construction period.
[0004]
FIG. 4 shows a typical example of what is called a jack-up method. This is a production system in which production facilities are provided on the ground floor, buildings are constructed for each layer from the top floor 36A, and are sequentially pushed up by jacks, and are composed of a lift-up device, a motor, and a control device. The rising of the building is screwed with a pair of screw shafts 35 and 35 that rotate via a motor 30, a gear box 31, and a worm gear jack 32 on a stage jack 33 installed on the ground as shown in FIG. This is performed by raising the movable stage 34.
After constructing the uppermost floor portion 36A on the movable stage 34 as shown in FIG. Next, the lower layer portion 36B of the uppermost floor 36A is constructed as shown by the one-dot chain line in FIG. 4B, and the entire load of the building is transferred to the ground by completing the lower layer portion 36B. Next, although not shown, after the movable stage 34 is lowered, both the uppermost floor portion 36A and its lower layer portion 36B are raised by the movable stage 34 as shown in FIG. Hereinafter, as shown in FIG. 4 (D), this is sequentially repeated to construct a middle- and high-rise structure.
As a result, the construction of each floor can be performed near the ground next to the rooftop floor, so construction work can be safely performed in a short construction period by eliminating the work at high places and realizing work that is not affected by the weather. However, in this construction method, the movable stage 34 is constructed while the lower floor is constructed below the upper floor jacked up by the movable stage 34, that is, until the entire load of the building is transferred to the ground due to the completion of the lower floor portion. The worm gear jack 32 and the screw shaft 35 are still loaded with all the loads on the upper floor, and the worm gear jack 32 and the screw shaft 35 are forced to have a high load, which causes problems in strength and safety.
[0005]
FIG. 5 shows a typical example of what is called a push-up method. A large-scale push-up device that should be called a fixed factory equipped with a screw jack that pushes up the constructed structure is installed on both sides of the structure to be constructed. Push up, then construct the lower floor, and on the raised floor, perform the construction work, exterior wall work and interior finishing work, and build up sequentially from the lower floor, the push up device is from the motor, screw jack and control device Composed. The building is raised by raising a pair of screw shafts 46 and 46 in a push-up device 45 installed on the ground as shown in FIG. Is. The screw shaft 46 is rotationally driven by a computer-controlled motor (not shown). The push-up device 45 should also be referred to as a small factory that supplies materials for construction at each level.
The work is performed by constructing the rooftop portion R and the top floor portion 50A between a pair of push-up devices 45 installed on both sides of the structure constructed as shown in FIG. Is placed on the pair of lifting arms 49, 49 in each push-up device 45 and lifted. Next, as shown in FIG. 5 (B), after extending the support member S from the top floor portion 50A to the side and passing the building load to the push-up device 45, the construction work and the outer wall work of the top floor portion 50A The interior finishing work is performed and the lower floor 50B is constructed. The pair of lifting arms 49 in the push-up device 45 is lowered in advance before constructing the lower floor. This is sequentially repeated as shown in FIG. 5C, and a medium-high-rise structure is constructed as shown in FIG. 5D.
As a result, the construction of each floor can be performed near the ground next to the rooftop floor, so construction work can be safely performed in a short construction period by eliminating the work at high places and realizing work that is not affected by the weather. However, even in this method, the load of the structure pushed up by the screw shaft 46 and the lifting arm 49 screwed to the screw shaft 46 extends the support member S and passes the building load to the push-up device 45. Until then, the screw shaft 46 and the lifting arm 49 had to be supported, and a high burden was imposed. In addition, the push-up device that can be said to be a small factory that supplies materials for construction at each level is extremely large and is already installed because it is installed on both sides of the structure to be constructed. It was unsuitable for construction of middle- and high-rise structures in a narrow site such as between buildings.
In addition, after the structure is completed, these push-up devices must be removed, and disposal of the push-up devices after the removal also requires a great deal of cost.
[0006]
[Problems to be solved by the invention]
Thus, in the conventional lift-up method, jack-up method and push-up method, during the construction of the structure by them, the burden on the structure to be built and the burden on the lifting device in the jack, etc. also increase. For this reason, the devices themselves must be made robust, leading to the enlargement of the devices and making it difficult to construct medium- and high-rise structures on narrow sites using these methods.
[0007]
Therefore, in the present invention, these conventional, especially push-up methods are further improved to reduce the load on the structure under construction and the load on the lifting device such as a jack so that even a small-scale device can be A method and apparatus for constructing a steel structure that enables construction of a large-scale structure and also reduces the cost of constructing in a narrow site such as between existing buildings and removing the equipment after completion To do.
[0008]
[Means for Solving the Problems]
For this reason, the first invention is spanned between at least four columns in which pin holes installed between the main column and the main column of the structure to be constructed are formed at equal intervals and these columns. The structure of the temporary structure is constructed on the connecting beam of the temporary reaction force frame by supporting the main side beam of the structure by a jack that moves up and down along the column of the temporary reaction force frame made of the connection beam. A horizontal beam is connected to the main side beam, a main column on the lower floor is constructed, and this is sequentially repeated to construct and push up each level.
Further, the second invention of the present invention is characterized in that the connecting beam of the temporary reaction force frame is incorporated as a second-floor main beam of the structure after completion of the final lifting. It is a means of.
According to a third aspect of the present invention, the jack includes an upper connecting member and a lower connecting member whose interval can be expanded and contracted by a bear lock cylinder, and each of the connecting members is formed in a column in the temporary reaction force frame. A fixing pin that is selectively engaged with a plurality of pin holes by automatic operation is provided, and this is a means for solving the problem.
[0009]
Embodiment
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show an embodiment of the present invention. FIG. 1 is a front view and a plan view for sequentially explaining a method for constructing a steel structure, and FIG. 2 shows a use mode of a jack used in the present invention. FIG.
As shown in FIG. 1, in the construction method of the structure by the push-up method of the present invention, it is possible to construct a middle- and high-rise structure even in a narrow site where there is almost no margin between the adjacent land boundaries. The jack device that is installed to push up the sequentially constructed layers is installed between the main pillar 2 and the main pillar 2 of the structure 1 to be constructed.
And in this invention, the jack which should push up each level | sequentially constructed level is used only for the pushing-up operation | work, Furthermore, the load burden of the structure in construction of each level | sequentially constructed level is for temporary installation with which the said jack was mounted | worn. The reaction force frame is configured to bear.
[0010]
As shown in FIGS. 1 (A) and 1 (E), at least four temporary reaction force frame columns 4V and a temporary reaction force frame connecting beam 4H spanned between these columns 4V to 4V on the ground. A temporary reaction force frame 4 consisting of ˜4H is installed.
As shown in FIG. 1A, since the temporary reaction force frame column 4V is installed between the main column 2 and the main column 2 of the structure to be constructed as viewed from the front, the boundary with the adjacent land It is possible to build a structure close to the line.
Each of the temporary reaction force frame columns 4V installed in this way is provided with a large number of pin holes 7, 7... At equal intervals and along the longitudinal direction (vertical direction) of each column 4V. The moving jack 5 is mounted.
As shown in FIG. 2, the jack 5 includes an upper connecting member 5A and a lower connecting member 5B whose distances can be expanded and contracted by a pair of bare lock cylinders 6 and 6, and each of the connecting members 5A and 5B includes the above-described connecting members 5A and 5B. Fixing pins 8A and 8B that are selectively engaged with the plurality of pin holes 7 formed in the temporary reaction force frame column 4V by automatic operation by computer control or the like are provided.
[0011]
As shown in FIG. 2A, the upper connecting member 5A and the lower connecting member 5B in the jack 5 can move in the vertical direction on the surface of the temporary reaction force frame column 4V having an H-shaped section. The jack 5 selectively engages the fixing pins 8A and 8B of the upper connecting member 5A and the lower connecting member 5B with the pin holes 7 of the temporary reaction force frame pillars 4V arranged at equal intervals, It moves up and down on the temporary reaction force frame column 4V by a behavior like a scale insect. The upper connecting member 5A and the lower connecting member 5B in the jack 5 may be provided with a guide roller or the like so that the surface of the temporary reaction force frame column 4V formed of H-shaped steel or the like is smoothly guided. .
As is well understood in FIGS. 2A, 2B, and 2C, bifurcated support arms 9, 9 are extended from the upper connecting member 5A of the jack 5 to the upper side, and these supports are supported. The upper end portion of the arm 9 moves up and down while supporting the main beam 3B of the structure to be constructed.
Since the support arms 9 and 9 are formed in a bifurcated shape, the structure can be pushed up at a position avoiding the main pillar 2 of the structure to be constructed.
[0012]
A method of constructing the steel structure 1 by the push-up method using the temporary reaction force frame 4 configured as described above will be described in detail with reference to FIG. 1. First, FIGS. As shown in FIG. 1 (E), the main side beam 3B, which is the roof (roof) portion, and the main column 2, which is the top floor wall, are connected to the jack 5 Place on the arms 9,9. When this is pushed up as shown in FIG. 1B and lifting is completed, the fixing pin 8A in the upper connecting member 5A of the jack 5 shown in FIG. The pin hole 7 is inserted and locked. As a result, all the load of the lifted structure is transferred to the temporary reaction force frame column 4V via the fixing pin 8A, and the bear lock cylinder 6 in the jack 5 is released from the burden of the structure.
Next, as shown in FIG. 1 (B) and FIG. 1 (E), the left and right permanent side beams 3B, 3B are connected and installed by the permanent horizontal beam 3A on the temporary reaction force frame connecting beam 4H. A roof or a floor is laid by laying steel frames and reinforcing bars and placing concrete. As a result, the load of the structure is transferred from the main transverse beam 3A to the temporary reaction force frame connecting beam 4H, so that the fixing pins 8A and 8B of the upper connection member 5A and the lower connection member 5B of the jack 5 are moved to the temporary reaction force. The jack 5 can be lowered by extracting from the corresponding pin hole 7 of the frame pillar 4V.
[0013]
Next, as shown in FIG. 1 (C), it is firmly supported by the jack 5 placed on the ground and becomes the main pillar 2 to be the top floor wall or the like or the side edge of the top floor roof or floor. The main side beams 3B and the like that are to be connected are connected, and steel frames and reinforcing bars are buried and concrete is placed on the top floor. In this way, each level is constructed sequentially and pushed up by the measuring operation of the jack 5 to construct a middle- and high-rise structure as shown in FIG.
In the present invention, the temporary reaction force frame connecting beam 4H that has borne the entire load during construction of the structure is incorporated as the second-floor main beam of the structure after completion of lifting of the final second-floor part. As a result, it is possible to reduce the cost by effectively using the materials and reducing the materials to be removed.
In the embodiment, a pair of jacks are attached to the temporary reaction force frame pillars. However, if necessary, two sets of jacks are attached to one place using two temporary reaction force frame pillars. It can also be configured.
[0014]
As mentioned above, although one embodiment of the present invention has been described, within the scope of the gist of the present invention, the shape of the main pillar and the main beam in the structure and the connection form between them, the roof, the ceiling in the structure , Floor and wall configuration, jack type, pin locking configuration between the jack and the temporary reaction force frame pillar, temporary reaction force frame configuration, mounting structure on the support arm of the jack, etc. Can be adopted as appropriate.
[0015]
【The invention's effect】
As described above in detail, according to the present invention, the push-up method has the advantages inherent in the push-up method, ensuring safety of work by reducing work at high places, and performing various identical operations that are not affected by the weather. In addition to ensuring the quality of the structure and shortening the construction period, the temporary reaction force frame to which the jack as a push-up device is attached is located inside the main pillar of the structure to be constructed. It is possible to construct medium- and high-rise structures by push-up method even in a narrow site such as between existing buildings.
In addition, according to the present invention, the load of the structure during construction of each level is almost entirely handled by the temporary reaction force frame, so the cylinder portion of the jack bears the load during lifting of the structure. It is sufficient to reduce the scale of the device and increase the safety factor.
The temporary reaction force frame connecting beam that bears the entire load during construction of the structure can be incorporated into the structure as the second floor main beam of the structure after the final second floor portion is lifted. As a result, it is possible to effectively use materials and reduce removed materials, thereby achieving cost reduction.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 shows a first embodiment of the present invention and is a front view and a plan view for sequentially explaining a method for constructing a steel structure.
FIG. 2 is a diagram showing a usage mode of a jack used in the present invention according to the first embodiment of the present invention.
FIG. 3 is a diagram showing a conventional lift-up method.
FIG. 4 is a diagram showing a conventional jackup method.
FIG. 5 is a diagram showing a conventional push-up method.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Steel structure 2 ... Main pillar 3A ... Main cross beam 3B ... Main side beam 4 ... Temporary reaction force frame 4H ... Temporary reaction force frame connecting beam 4V ... Temporary reaction force frame column 5 ... Jack 5A ... Upper connecting member 5B ... Lower connecting member 6 ... Bare lock cylinder 7 ... Pin hole 8A ... Fixing pin (upper part)
8B ・ ・ ・ Fixing pin (lower part)
9 ... Support arm

Claims (3)

Temporary reaction force frame consisting of at least four pillars formed by equidistant pin holes erected between the main pillars of the structure to be constructed and the pillars, and a connecting beam spanned between the pillars. The vertical side beam of the structure is lifted and moved by a jack that moves up and down along the pillar, and the horizontal side beam of the structure is connected to the permanent side beam on the connecting beam of the temporary reaction force frame. In addition, a method for constructing a steel structure is characterized in that a main pillar on a lower floor is constructed, and this is repeated in order to construct and push up each level.   2. The method for constructing a steel structure according to claim 1, wherein the connecting beam of the temporary reaction force frame is incorporated as a second-floor main beam of the structure after completion of final lifting.   The jack is provided with an upper connecting member and a lower connecting member whose interval can be expanded and contracted by a bear lock cylinder. The apparatus used for the construction method of the steel structure of Claim 1 provided with the fixing pin engaged selectively detachably by this.

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