JP2717142B2 - Construction method of suspended structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for constructing a suspended structure in which floor plates constituting each floor are suspended from beams of a ramen structure,
In particular, the present invention relates to a method for constructing a suspended structure that can be quickly constructed without selecting a construction place.

"Conventional technology and its problems" In conventional buildings, the floor or ceiling is rigidly connected to the frame of the building, such as columns, so the weight of each floor, including the loading load, goes in the horizontal direction of the building. Directly contributes to the vibration of Since the vibration of the building on the upper floor is an accumulation of the vibration of the building on the lower floor, the amplitude of the vibration on each floor becomes larger as going to the upper floor. Therefore, the total height of the building is inevitably determined by the site area and the structure of the building, and in order to make it a higher-rise building, it is necessary to make the structure of the building high-strength, which is very uneconomical. there were.

The present invention has been made in view of the above circumstances, and enables the construction of a higher-rise building by eliminating the rate at which the weight of each floor contributes to the horizontal vibration of the building, and at the same time, the construction location is reduced. The purpose of the present invention is to provide a method for constructing a suspended structure that allows early construction without any choice.

Means for Solving the Problems In view of the above, the present invention provides a method for suspending a floor plate constituting each floor from the beam of a ramen structure having a plurality of pillars erected in a horizontal direction. A method for constructing a suspended structure to be carried includes the following steps.

i) a step of forming a predetermined number of the floorboards in the vicinity of the pillars while forming the pillars from the bottom thereof, and ii) erection of a beam between the pillars and a rod on each of the floorboards. Iii) after the beam is erected, the floor plate is lifted to a predetermined position using the rod or the like, and the upper end of the rod or the like is fixed to the beam so that each floor plate is directly connected to the rod. Suspending the beam from the beam body.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 are views showing an embodiment in which the method for constructing a suspended structure according to the present invention is applied to a general office building. In these figures, what is indicated by reference numeral 1 is an office building (suspended structure).
A pair of hollow rectangular cylindrical columns 2 and 2 having a depth substantially the same as the depth of the building 1 and a plurality of beams 3 and 3. (Only one is shown in the drawing). Both the pillar 2 and the beam 3 are made of concrete, and the beam 3 is a precast concrete beam, and PC steel bars 4 are disposed along the longitudinal direction thereof, and both ends (only one end in the figure) (Not shown) are fixed to both end surfaces of the beam 3 via the nuts 5, respectively, so that a compressive force (prestress) is generated in the longitudinal direction.
Has been introduced.

Also, a predetermined number (four in the illustrated example) of precast concrete floor plates 7, 7,... Constituting each floor of the building 1 are suspended from these beams 3 via rods 6, 6,. . The rods 6, 6,... Are fixed to both ends of the floor plates 7, 7,. Since the rod 6 suspends the floor plate 7 for a long period of time, a stainless steel rod excellent in rust prevention and durability is preferable. Processing is performed. Are connected to the side surfaces of the columns 2 and 2 via dampers (not shown) in such a manner that movement in the horizontal direction is not restricted.
Reference numeral 8 denotes an elevator installed in the column 2.

Next, a method of constructing the office building 1 having the above configuration will be described with reference to FIGS.

(I) Foundation Construction As shown in FIG. 3A, a foundation beam B is constructed in the ground G where the building 1 is to be constructed. The method of constructing the foundation beam B is arbitrary, and may be appropriately selected from known methods according to the construction conditions. Further, it goes without saying that the foundation may be constructed not only with the foundation beam B but also with an underground continuous wall, a cast-in-place pile or the like.

(Ii) Construction of pillars and floorboards As shown in FIG. 3 (b), pillars 2 and 2 are constructed from the bottom thereof from the foundation beam B and a predetermined number of floorboards are provided between the pillars 2 and 2. Are molded in a state where 7, 7,... Are laminated. Here, the construction method of the pillar 2 is arbitrary,
In this embodiment, for the purpose of shortening the construction period, a concrete form is poured into a mold having a shape corresponding to the column 2 while the form is continuously pulled up by pulling up the form to form the column 2. The construction method called is adopted. Hereinafter, the sliding foam method will be described with reference to FIGS. 4 and 5. FIG.

FIG. 4 to FIG. 5 are views showing a concrete casting device used in the sliding foam method. In FIG. 4, reference numeral 11 denotes a ring frame, reference numeral 12 denotes a number of horizontal beams called horizontal reference beams radially attached to the ring frame 11, and reference numeral 13 slidably fits at predetermined positions on the horizontal beam 12. It is a joined joint beam. This joint beam
A main jack 14 is fixed to the center of 13, and a rod 15 passes through the center of the main jack 14. The upper end of the rod 15 is held by the main jack 14, and
The lower end is supported by the ground G.

As shown in FIG. 5, a pair of yokes 16 are slidably fitted to one joint beam 13 so as to cover the joint beam 13 from above. The yoke 16 has an upper yoke 16a at the upper end of which the fitting beam 13 is fitted, and an upper yoke 16a
And a lower yoke 16c that is rotatably attached to the lower end of the base via a pin 16b. This lower yoke 16c
Is provided with a formwork 18 via a belly 17.
The formwork 18 is formed by connecting a large number of formwork plates in a rectangular tube shape by bulging 17. Reference numeral 21 denotes a concrete bucket, and reference numeral 22 denotes a concrete hopper.

In order to construct the column 2 using the apparatus having the above configuration, the main jack 14 grips the rod 15 and extends it, thereby taking a reaction force on the ground G and raising the form 18 upward. While pulling up, concrete may be poured from the upper end of the formwork 18 to construct the column 2 upward from the bottom thereof.

Reference numeral 19 denotes a diameter adjusting jack having one end connected to the end of the joint beam 13 and the other end connected to a predetermined portion of the horizontal beam 12, and reference numeral 20 denotes one end to the end of the joint beam 13 and the other end. But upper yoke 16
A wall thickness adjusting jack connected to a. By appropriately expanding and contracting these jacks 19 and 20, the pillar 2 can be constructed as described above while the diameter and wall thickness of the pillar 2 are arbitrarily set.

On the other hand, the method of forming the floor plate 7 is also arbitrary, and a predetermined number of floor plates 7, 7,... May be formed by repeating concrete casting and demolding using one mold frame (not shown). Alternatively, it is needless to say that a predetermined number of the concrete of the floorboards 7, 7,...

When the pillars 2 and 2 have been constructed to a predetermined height and a predetermined number of floorboards 7, 7,... Have been formed (see FIG. 3 (c)), these construction and forming operations are completed. . However, it is not necessary to end these pillar 2 construction work and floor plate 7 forming work at the same time, and even if either work is completed first, it does not greatly affect the entire process.

(Iii) Beam erection Beams 3, 3,... Having a length corresponding to the distance between the columns 2, 2 are manufactured in advance at a factory or a site, and these beams 3, 3,. To the vicinity of pillars 2 and 2. When the beams 3, 3, ... are manufactured, a sheath (not shown) through which the PC steel bar 4 is inserted later is buried in advance in the beam 3 in the longitudinal direction. At the stage of loading the beams 3, 3, ... or before,
By inserting a PC steel rod 4 into a sheath embedded therein and fixing both ends thereof to both end surfaces of the beam 3 with nuts 5, a compressive force (prestress) is introduced in advance in the longitudinal direction of the beam 3. Keep it.

After completion of the work for constructing the pillars 2, hoisting machines 9, 9 such as winches are installed on the upper ends of the pillars 2, 2, and the beams 3 are lifted by the hoisting machines 9, 9 via the wires 9a, 9a (third). (See FIG. (D).) Referring to FIG. 3 (d), the beam 3 is erected between the columns 2 and 2 by placing both ends thereof on the columns 2 and 2 respectively (third column).
Fig. (E). In this way, as shown in FIG. 3 (f), a predetermined number of beams 3, 3,... (Three in the illustrated example) are installed between the columns 2, 2.

(Iv) Fixing the floor plate After all the beams 3, 3, ... have been installed between the columns 2, 2,
The hoisting machines 9, 9 such as winches are installed on the upper ends of the beams 3, 3,... Respectively, and the lower ends of the rods 6, 6, which are pulled up by the hoisting machines 9, 9, are attached to the floor plates 7, 7,. Are lifted by the hoisting machines 9, 9 via the rods 6, 6 (see FIG. 3 (g)), and the floor plates 7, 7, ... are lifted to predetermined positions. In this state, the upper ends of the rods 6, 6 are fixed to the lower ends of the beams 3, 3,... To construct the frame of the building 1 (see FIG. 3 (h)).

The connecting method between the rod 6 and the floor plate 7 is arbitrary, but as an example, through holes (not shown) are formed at common positions at both ends of the floor plates 7, 7,. For example, there is a method in which a rod 6 is inserted for each time, and the rod 6 is fixed to the floor plate 7 at intervals of each floor. Alternatively, while preparing a large number of rods 6, 6, ... cut into lengths of about two to three stories, the thicknesses of these rods 6, 6, ... are varied stepwise,
The floor plates 7, 7,... Are gradually increased from the lower floor to the upper floor so that the rods 6, 6,.
There is also a method of fixing to. In this way, by cutting the rods 6, 6, ... short, the floor plates 7, 7, ... can be easily attached and detached in units of the length of the rods 6, 6, ... after the suspension structure is constructed. It is possible and very convenient.

After the building of the building, the building 1 is completed by constructing other structural members such as walls and installing incidental facilities.

The building 1 can be constructed by the method described above. In this building 1, the floorboards 7, 7,... Constituting the respective floors are all suspended by beams 3 located on the top floor of the building 1. Therefore, the weight of each floor including the load on the building 1 is equal to that of the building 1. It hardly contributes to horizontal vibration. Therefore, in this building 1, since it is only necessary to ensure the seismic resistance of its frame, that is, the columns 2, 2, and the beams 3, 3,..., The columns 2, 2, and the beams 3, 3,. By having a structure, it is possible to make the building higher in height than a conventional building.

Moreover, when the building 1 is constructed, the construction work of the pillars 2 and the forming work of the floor plate 7 are performed simultaneously, so that the whole building 1 can be constructed at an early stage. Moreover, the floor plate 7, ...
Since the two sheets are formed in a laminated state, the floorboard 7
Can be simplified, and can greatly contribute to the early construction of the building 1 described above.

"Variations of the Invention" The details of the method of constructing a suspended structure of the present invention or the suspended structure constructed thereby are not limited to the above-described embodiment, and various modifications are possible. Hereinafter, a modified embodiment of the present invention will be described with reference to FIGS. 6 to 10.

(I) Application to high-rise building FIG. 6 is a diagram showing an example in which the method of constructing a suspended structure according to the present invention is applied to a high-rise building. In this figure, a high-rise building 31 of this embodiment has a structure in which a large number of frames of the building 1 of the above embodiment are stacked in the height direction.
Even in such a high-rise building 31, the above-described effects can be obtained. In particular, according to the method for constructing a suspended structure of the present invention, the column 2 can be separately constructed even when the beam 3 is erected, and this can contribute to shortening the construction period described above.

(Ii) Application to Existing Structure FIG. 7 shows a method for constructing a suspended structure according to the present invention.
It is a figure showing the example which constructed building 1 above. Similarly, FIG. 8 is a diagram showing an example in which a high-rise building 31 is constructed above a road 33 by the same construction method. In this case, according to the method of constructing a suspended structure of the present invention, the beams 2, 3,... Are erected between the columns 2, 2 after the columns 2, 2 are constructed.
Since it is possible to construct a suspended structure if only the minimum work space necessary for construction can be secured, constructing a suspended structure so as to straddle the station 32 and the road 33 obstructs traffic at these stations 32 and the road 33. A suspended structure can be constructed without any. That is, it is possible to utilize the excess space above the existing structure, and to construct the suspension structure without affecting the existing structure at all.

(Iii) Modifications of Pillars In the above-described embodiment, the depth of the pillar 2 is formed substantially the same as the depth of the building 1, and the suspended structure is constructed by the two pillars 2 and 2. However, a general building is used. Similarly to the above, it is needless to say that the suspended structure may be formed by erected columns at the four corners of the building and erection of beams in a lattice shape between the columns. Ninth
FIG. 10 to FIG. 10 are diagrams showing an example of a suspended structure in which the columns 2, 2,... Are arranged in a checkered pattern in plan view by the method of constructing a suspended structure of the present invention. The suspension structure 34 of this embodiment has a structure in which the beams 3 are multilayered similarly to the high-rise building 31 shown in FIG. 6, but unlike the embodiment of FIG. There is no seam from the bottom floor to the top floor,
That is, it is configured as one pillar. This pillar 2,
2, connecting beams 35 are provided in one direction (vertical direction in FIG. 9), and these connecting beams 3
The beams 3, 3, ... are erected between 5, 35. As shown in FIG. 10, brackets 36 and 36 are provided on the side surfaces of the pillar 2 at positions where the connecting beams 35 are erected, and the connecting beams 35 are mounted on the brackets 36 so that the columns 2 It is erected between the two. The beams 3, 3,... Are mounted on the connecting beams 35, 35 to be bridged between the connecting beams 35, 35, as shown in FIG. Therefore, in the suspended structure 34 having such a configuration, the degree of freedom of the plan is greatly increased, and for example, it is possible to pass a curved road 33 on the lowest floor portion of the suspended structure 34. In other words, it is possible to construct the suspension structure 34 on such a complicated existing structure. Moreover, since the connecting beams 35, 35,... Are joined at their side surfaces by providing the brackets 36, 36 on the column 2, this column 2 can be connected seamlessly from the lowest floor to the highest floor. It can be constructed as a pillar, and can greatly contribute to the shortening of the construction period described above.

Further, in each of the above-described embodiments, the beam body is erected between the pillars erected opposite to each other to form the skeleton of the suspended structure. It is a matter of course that a projecting portion may be formed by extending the projecting portion, and the floor panel may be suspended from the projecting portion.

[Effects of the Invention] As described above in detail, according to the present invention, the floor plates constituting each floor are formed from the beams of the ramen structure having the beams erected between the plurality of columns in the horizontal direction. When constructing a suspended structure that is displaceably suspended in a column, a column is formed from the bottom thereof while a predetermined number of floor plates are laminated near these columns, and a beam is formed between the columns. A rod and the like are connected to each floor plate while being erected, and the floor plate is lifted to a predetermined position using the rod and the like, and the upper end of the rod and the like is fixed to the beam, so that each floor plate is hung by the rod and the like. In particular, since the column construction operation and the floor plate forming operation are performed simultaneously, the entire suspension structure can be quickly constructed. In addition, since beams are erected between these pillars after the columns are constructed, it is possible to construct a suspended structure if only the minimum working space necessary for column construction can be secured. By constructing the object, the excess space above the existing structure can be utilized, and the suspended structure can be constructed without affecting the existing structure at all.

Moreover, in the suspended structure constructed in this way, the floorboards that make up each floor are all suspended by beams, so the weight of each floor including the load on the floor is affected by the horizontal vibration of the suspended structure. It hardly contributes, and therefore can be a taller building compared to a conventional building.

[Brief description of the drawings]

1 and 2 are views showing a suspended structure constructed by a method of constructing a suspended structure according to an embodiment of the present invention. FIG. 1 is a front view in which main parts are cut away. 2 is a cross-sectional view taken along the line II-II 'in FIG. 1, FIG. 3 is a process diagram for explaining a method of constructing the suspension structure, and FIGS. FIG. 4 is a cross-sectional view showing a formwork apparatus applied to a sliding foam method used in the method shown in FIG. 4, and FIG. 5 is a cross-sectional view showing the inside of an IV circle in FIG. Figure is a schematic front view showing a high-rise building constructed by a method of constructing a suspended structure according to another embodiment of the present invention,
FIG. 7 is a schematic front view showing a suspended structure constructed by a construction method of another embodiment, and FIG. 8 is a schematic front view showing a suspended structure constructed by a construction method of still another embodiment. FIG. 9, FIG. 9 and FIG. 10 are diagrams showing a suspension structure constructed by a construction method according to still another embodiment, wherein FIG. 9 is a sectional view, and FIG. It is the side view shown. 1 ... office building (suspended structure), 2 ... pillar (pillar), 3
…… beams (beams), 7… floor boards.

Claims (1)

(57) [Claims] 1. A suspended structure in which a floor plate constituting each floor is suspended in a horizontal direction from said beams of a ramen structure having a beam spanned between a plurality of pillars. A method of forming the pillars from the bottom thereof while forming a predetermined number of the floor plates in the vicinity of these pillars in a stacked state, further erection of a beam between these pillars, and By connecting a rod or the like to the rod, the floor plate is lifted to a predetermined position using the rod or the like, and the upper end of the rod or the like is fixed to the beam, so that each floor plate is directly separated from the beam by the rod or the like. A method for constructing a suspended structure, characterized by being suspended.