JP5757175B2 - Support pillar for high-rise building and its construction method - Google Patents

Description

  The present invention relates to a support pillar for a high-rise building and a construction method thereof.

  Conventionally, a structure of a high-rise building and a support pillar as shown in Patent Document 1 are known. As shown in FIGS. 17 and 18, the structure of a high-rise building in Patent Document 1 is a tube structure that is a tubular structure that is continuously provided in the vertical direction over the entire height of the building as the main structure of the building. It is. The structure of this high-rise building is a triple tube structure comprising an outer peripheral tube frame A located on the outer periphery of the building, an inner peripheral tube frame B provided coaxially on the inner side, and a core tube frame C provided further on the inner side. (So-called triple tube structure). The pillar of the inner peripheral tube frame B is constituted by a support pillar 9 having a high strength and a small cross section.

  This support column 9 is installed between the upper and lower step beams 8 on each floor of the inner peripheral tube frame B from the ground to the top floor. The step beam 8 is rigidly joined to the floor slabs 6 and 7 on each floor. In addition, the foundation bottom slab 2 is installed under the first floor slab 3 of the high-rise building, and the pile 1 is installed under the foundation bottom slab 2.

  The outer tube structure A is constituted by the column beam 4. The core tube frame C is constituted by a core wall 5. The inner peripheral floor slab 6 is provided between the core tube frame C and the inner peripheral tube frame B, and the outer peripheral floor slab 7 is provided between the inner tube frame B and the outer tube frame A.

  As shown in FIGS. 19 and 20, the support column 9 is constructed by welding steel plates 9c to the upper and lower ends of the thick-walled steel pipe 9a and filling the inside of the steel pipe 9a with concrete 9b as a cement-based hardened body. This is a high-strength column that can receive axial force with a small cross section. The support column 9 and the upper and lower step beams 8 are strongly bonded to each other by a fixing bolt 9d penetrating the steel plate 9c and the step beam 8 up and down. A reinforcing bar 9e is arranged inside the step beam 8.

  In the structure of a high-rise building configured as described above, when each floor of the high-rise building undergoes shear deformation due to the action of seismic force, the joint portion of the support pillar 9 behaves like a pin joint, and the support pillar 9 And the steel plate 9c deforms supple. As a result of appropriate design, etc., the moment due to the seismic force does not act on the stepped beam 8 of the inner peripheral tube frame B or can be reduced so as not to cause a problem.

  On the other hand, a technique disclosed in Patent Document 2 is known as a joint structure between a reinforced concrete column of a building and a steel beam.

JP 2011-58241 A JP 2001-11944 A

  By the way, in the above-mentioned support pillar for a high-rise building, development of a high-strength and inexpensive structure capable of receiving an axial force with a smaller cross section has been demanded.

  The present invention has been made in view of the above, and an object of the present invention is to provide a high-strength and inexpensive support column for a high-rise building that can receive an axial force with a smaller cross section and a method for constructing the same.

In order to solve the above-described problems and achieve the object, a support column for a high-rise building according to claim 1 of the present invention is a support column used for a high-rise building, and concrete is filled in a steel pipe, and a spiral is provided. A panel composed of steel pipe concrete columns with reinforced core reinforcing bars, base plates welded to the upper and lower end surfaces of the steel pipe concrete columns, and provided at the upper and lower ends of the steel tube concrete columns, and the outer periphery made up of steel plates Insert another core rebar consisting of mechanical joint and threaded rebar into the zone block and connect and fix the steel pipe concrete column and the panel zone block via the base plate so that axial force can be received with a small cross section It is characterized by that.

  A support column for a high-rise building according to claim 2 of the present invention is characterized in that in claim 1 described above, at least one of a beam reinforcing bar and a slab anchor bar is joined to the panel zone block by a mechanical joint. And

  Moreover, the construction method of the support pillar for high-rise buildings which concerns on Claim 3 of this invention is a construction method of the support pillar for high-rise buildings of Claim 1 or 2 mentioned above, Comprising: The lower surface of the said steel pipe concrete pillar A core reinforcing bar protruding from the upper surface of the panel zone block is inserted into a splice sleeve, and the steel pipe concrete column is connected and fixed to the panel zone block.

  According to a fourth aspect of the present invention, there is provided a method for constructing a support pillar for a high-rise building according to the third aspect, wherein a grout material is filled in a gap between the splice sleeve and the core reinforcing bar. To do.

  According to the support pillar for a high-rise building according to the present invention, it is a support pillar used for a high-rise building, which is composed of a steel pipe concrete pillar in which concrete is filled in a steel pipe and a spirally reinforced core rebar is arranged. Since the steel pipe concrete column and the panel zone block are connected and fixed by inserting another core rebar into the panel zone block provided at the upper and lower ends of the steel pipe concrete column, so that axial force can be received with a small cross section, As a result, it is possible to provide a high-strength and inexpensive support column that can receive axial force with a smaller cross section.

  Further, according to the method for constructing a support pillar for a high-rise building according to the present invention, the above-described method for constructing a support pillar for a high-rise building, in which the core reinforcing bar protruding from the lower surface of the steel pipe concrete pillar is provided in the panel zone Inserted into the splice sleeve provided on the upper surface of the block, the steel pipe concrete column is connected and fixed to the panel zone block, providing a high-strength and inexpensive support column that can receive axial force in a smaller cross section than before. There is an effect that can be done.

FIG. 1 is a side sectional view showing an embodiment of a support pillar for a high-rise building according to the present invention. FIG. 2 is a detailed plan view of FIG. FIG. 3 is a side sectional view of the support column in FIG. 1 as viewed from the left-right direction. FIG. 4 is a detailed plan view of FIG. FIG. 5 is a diagram showing Step 1 of the method for constructing the support pillar for a high-rise building according to the present invention. FIG. 6 is a diagram showing Step 2 of the method for constructing the support pillar for a high-rise building according to the present invention. FIG. 7 is a diagram showing Step 3 of the method for constructing the support pillar for a high-rise building according to the present invention. FIG. 8 is a diagram showing step 4 of the method for constructing the support pillar for a high-rise building according to the present invention. FIG. 9 is a diagram showing step 5 of the method for constructing the support pillar for a high-rise building according to the present invention. FIG. 10 is a diagram showing step 6 of the method for constructing the support pillar for a high-rise building according to the present invention. FIG. 11 is a diagram showing step 7 of the method for constructing the support pillar for a high-rise building according to the present invention. FIG. 12 is a diagram showing step 8 of the method for constructing the support pillar for a high-rise building according to the present invention. FIG. 13 is a side sectional view showing an example of the structure of a high-rise building using the support pillar according to the present invention. 14 is a plan view of each floor of FIG. FIG. 15 is a side sectional view of a megastructure having a structure of a high-rise building using a support pillar according to the present invention. 16 is a plan view of the megastructure floor (L, M, N floor and top floor) of FIG. FIG. 17 is a side sectional view showing an example of a structure of a high-rise building using a conventional support pillar. FIG. 18 is a plan view of each floor of FIG. FIG. 19 is a detailed side sectional view of a conventional support column. FIG. 20 is a detailed plan view of a conventional support column.

  DESCRIPTION OF EMBODIMENTS Embodiments of a support column for a high-rise building and a construction method thereof according to the present invention will be described below in detail with reference to the drawings. In this embodiment, a case where the present invention is applied to a high-rise building with a triple tube frame having stepped beams 8 as shown in FIGS. 17 and 18 will be described. However, the present invention is not limited to this embodiment. .

[Support pillars for high-rise buildings]
First, a support column for a high-rise building according to the present invention will be described with reference to FIGS.

  As shown in FIG. 1 and FIG. 2 (or FIG. 3 and FIG. 4), the support pillar 20 for a high-rise building according to the present invention is used for a high-rise building, and is a thick square steel pipe (d) It consists of steel pipe concrete columns (c) filled with high-strength concrete (ne) and core reinforcing bars (sole) reinforced with spiral hoops (se). The steel pipe concrete column (c) and the panel zone block (a) are connected and fixed by inserting the insertion connecting core rebar (ma) into the panel zone block (a) provided at the upper and lower ends of this steel pipe concrete column (c), The axial force can be received with a small cross section.

  A splice sleeve (sa) is provided in the upper part of the steel pipe concrete column (c), and a mechanical joint (d) is provided in the lower part. Base plates (e) are welded to the upper and lower end surfaces of the steel pipe (d). In addition, spiral hoops (C) are fixed to the branch reinforcing bars (t) that are taken out from the core reinforcing bars (So), and the high-strength concrete (N) inside the steel pipe concrete column (U) is integrated with the reinforcing bars. The support pillar 20 of the book is configured.

  For this reason, according to the present invention, it is possible to provide a support column 20 that is high in strength and inexpensive and can receive axial force in a smaller cross section than in the past.

  Here, the cross-sectional shape of the steel pipe (d) of the support column 20 is not limited to a square shape, and it is a high-strength column that can receive axial force with a small cross-section by filling a cement-based hardened body such as high-strength concrete. As long as it can be obtained, a round shape or any other cross-sectional shape can be used, and a combination of a plurality of thick steel materials such as H steel and square steel may be used.

  In addition, the reinforcing bars such as the core rebar (sole) and spiral hoop (se) of the support pillar 20 are members necessary to make the size of the pillar cross section constant on the upper and lower floors of the high-rise building. It is also possible to form this cross section with the same size by adjusting only the strength of the high strength concrete (ne) to be filled.

  The panel zone block (A) is constructed by welding steel plates to form an outer periphery, and is provided with mechanical joints (d) and screw rebars (ki) for fixing the base plate (e) at the four corners of the inside. A hoop is provided and filled with high-strength concrete. Productivity can be improved by factory production. Inside this panel zone block (A), a mechanical joint (D) and a threaded reinforcing bar (G) are provided to be continuous with the beam (H) (see FIG. 1). In addition, a mechanical joint (d) and a screw rebar (ki) are provided for fixing a slab anchor bar (c) used for integration with the floor (see FIG. 3).

  The slab anchor bar (c) is joined to the mechanical joint (d) of the panel zone block (a). The beam rebar (na) is joined to the mechanical joint (d) of the panel zone block (a) via the relay bolt (co). As a result, the panel zone block (a) integrates the support pillar (c), the beam (chi), and the floor (f).

  Here, as shown in FIGS. 1 and 2, the beam (h) may be constructed of cast-in-place concrete, or may be made PC (precast) to increase productivity. A stirrup (e) can be provided in the beam (h). As shown in FIG. 3 and FIG. 4, the floor (F) may be constituted by not only a half PC slab (Te) but also an iron plate formwork incorporating a reinforcing bar.

  As a structural characteristic of the panel zone block (A), since a large axial force is applied in the vertical direction, a large force for expanding and deforming outward is applied. Therefore, in this embodiment, in order to suppress this and balance the stress, the surrounding four surfaces are surrounded by a steel plate (si) and welded (su), and at the same time, a hoop (f) is applied to the screw rebar (ki) of the internal base plate (e). By installing, the strength is further enhanced. In addition, the reinforcing steel plate (si) on the four surrounding surfaces is not necessarily required in the range where the axial force is small on the upper floor of the high-rise building.

  The base plate (e) is fixed to the mechanical joint (d) on the panel zone block (a) side by means of fixing bolts (a) via column vertical adjustment bolts (f). Further, a steel angle (neck) is provided between the lower part of the panel zone block (A) and the beam (H).

  The grout material is connected between the upper base plate (e) and the panel zone block (a) through the grout injection hole (no) provided in the lower square steel pipe (d) and the splice sleeve (sa) communicating therewith. (Ku) is filled. Further, between the lower base plate (e) and the iron plate (si), grout material (ku) is filled through grout injection holes (no) provided in the iron plate (si). The upper side of the base plate (e) on the upper side of the panel zone block (a) is filled with mortar (h).

[How to construct support pillars for high-rise buildings]
Next, a method for constructing a support pillar for a high-rise building according to the present invention will be described with reference to FIGS. Here, (a) and (b) of FIGS. 5 to 12 are a plan sectional view and a side sectional view, respectively. The support pillar of the present invention is constructed from the lower floor to the upper floor by the construction procedure of Step 1 to Step 8.

  As shown in FIG. 5, in Step 1, a panel zone block (A) produced in the factory is installed on the upper side of the support pillar 20 already installed on the N-1 floor. Insert the fixing bolt (A) into the base plate (E) above the support column 20.

  As shown in FIG. 6, in step 2, the base plate (e) is fixed to the mechanical joint (d) in the panel zone block (a) with bolts (a), and the lower lid is covered with an iron plate (si).

  As shown in FIG. 7, in step 3, slab anchor bars (c) and beam reinforcing bars (na) are fixed to the mechanical joints (d) in the panel zone block (a) with relay bolts (co). To do. As a result, the state of step 4 as shown in FIG. 8 is obtained.

  As shown in FIG. 9, in step 5, a beam form (mi) is installed on the side of the beam, and a relay bolt (co) is attached to the upper mechanical joint (d) in the panel zone block (a). insert.

  As shown in FIG. 10, in step 6, the core rebar (sole) inserted into the splice sleeve (s) of the panel zone block (a) is attached to the mechanical joint (d) at the center of the upper support pillar 20. Fix it. This core reinforcing bar (sole) is an insertion connecting core reinforcing bar (m) (see FIG. 1), and has a constant length and is used to ensure the floor height accurately. The support pillars 20 on the upper floor side are in a “frozen” state by the core reinforcing bars (sole). The height is adjusted with four pillar vertical adjustment bolts (f) in plan view, and the support pillar 20 on the upper floor is made to stand vertically and is fixed with fixing bolts (A).

  As shown in FIG. 11, in step 7, the grout material (ku) is injected into the splice sleeve (sa) through the grout injection hole (no) of the support pillar 20 on the lower floor side, and the core reinforcing bar (so) and the splice sleeve ( Fill the gap between the two). Further, the grout material (ku) is filled into the gap between the base plate (e) and the panel zone block (a) through the grout injection hole (d) of the iron plate (si).

  As shown in FIG. 12, in the final step 8, after the upper grout material (curd) is cured, the upper part thereof is filled with mortar (hi) to form a smooth surface. In this way, the support pillar 20 between the (N-1) th floor and the Nth floor is constructed.

[Structure of high-rise building using support pillars]
Next, the structure of a high-rise building using the support pillar according to the present invention will be described with reference to FIGS.

  As shown in FIGS. 13 and 14, the structure 100 of a high-rise building uses a tube frame, which is a tubular structure continuously provided in the vertical direction over the entire height of the building, as the main frame of the building. The structure 100 of this high-rise building is a triple tube comprising an outer peripheral tube frame A located on the outer periphery of the building, an inner peripheral tube frame B provided coaxially on the inner side, and a core tube frame C provided further on the inner side. It consists of a frame (so-called triple tube structure). The column of the inner peripheral tube frame B is constituted by the support column 20 of the present invention.

  The support column 20 is installed between the upper and lower step beams 8 on each floor of the inner peripheral tube frame B from the ground to the top floor. The step beam 8 is rigidly joined to the floor slabs 6 and 7 on each floor. In addition, the foundation bottom slab 2 is installed under the first floor slab 3 of the high-rise building, and the pile 1 is installed under the foundation bottom slab 2.

  The outer tube structure A is constituted by the column beam 4. The core tube frame C is constituted by a core wall 5. This core wall may be a seismic wall having an opening. Moreover, you may comprise a core tube frame with a column beam. The inner peripheral floor slab 6 is provided between the core tube frame C and the inner peripheral tube frame B, and the outer peripheral floor slab 7 is provided between the inner tube frame B and the outer tube frame A.

  In the structure 100 of the high-rise building of the present invention configured as described above, when each floor of the high-rise building undergoes shear deformation due to the seismic force, the joint portion of the support column 20 behaves like a pin joint, and the support The pillar 20 and the base plate (e) are deformed flexibly. As a result of appropriate design, etc., the moment due to the seismic force does not act on the stepped beam 8 of the inner peripheral tube frame B or can be reduced so as not to cause a problem.

  In the embodiment described above, megastructure beams may be provided on the top floor and a predetermined intermediate floor. In this case, as shown in FIGS. 15 and 16, the core tube frame C, the megastructure inner peripheral tube frame 10 and the megastructure beam 12 provided on the uppermost and middle specific floors (L, M, N floors) and The megastructure outer tube structure 11 is rigidly joined in a lattice shape to construct an integral giant structure. And the support pillar 20 provided in the megastructure inner peripheral tube frame 10 is supported by the megastructure beam 12 provided in the L, M, and N floors. Even if it does in this way, the same effect as said embodiment can be acquired.

Next, the effect of the present invention will be described.
The following effects (1) to (5) can be obtained by providing a support pillar having a high strength and a small cross section on the inner peripheral tube frame B of the high-rise building.

(1) By receiving the inner peripheral tube frame B with the support pillar 20, the floor slabs 6 and 7 have a short span as compared with the case without the support pillar 20 (floor thickness t = about 300 mm), and the floor thickness t is reduced. Even if it is thinned to about t = 200 mm, the performance of the weight impact sound level can be ensured.

(2) super high-rise apartment, etc. Building 1 has floor area tens of thousands m ² if high-rise buildings, t = floor thickness of about 300mm can be reduced to the order of about 200 mm, a significant reduction in the floor of the load floor itself It is possible to greatly reduce the number of enclosures and provide a cheaper building.

(3) Since a short-span floor can be realized, the construction method is diversified, and an inexpensive floor such as an iron plate formwork in which a pre-assembled reinforcing bar is incorporated in an iron plate can be adopted, thereby further reducing the cost.

(4) Since the support column 20 can be made thin by filling the steel pipe with concrete (about 400 squares), the influence on the plan is very small.

(5) The above effects remain the same regardless of whether the structure of the high-rise building is seismic, seismic control, intermediate floor seismic isolation, or seismic isolation.

  As described above, according to the support pillar for a high-rise building according to the present invention, it is a support pillar used for a high-rise building, in which the steel pipe is filled with concrete, and the steel pipe in which the spirally reinforced core rebar is arranged. It consists of a concrete pillar, and another steel bar is inserted into the panel zone block provided at the upper and lower ends of this steel pipe concrete pillar, and the steel pipe concrete pillar and the panel zone block are connected and fixed, so that axial force can be received with a small cross section. As a result, it is possible to provide a support column that is high in strength and inexpensive and can receive axial force in a smaller cross section than in the past.

  Further, according to the method for constructing a support pillar for a high-rise building according to the present invention, the above-described method for constructing a support pillar for a high-rise building, in which the core reinforcing bar protruding from the lower surface of the steel pipe concrete pillar is provided in the panel zone Inserted into the splice sleeve provided on the upper surface of the block, the steel pipe concrete column is connected and fixed to the panel zone block, providing a high-strength and inexpensive support column that can receive axial force in a smaller cross section than before. can do.

  As described above, the support pillar for a high-rise building and the construction method thereof according to the present invention are useful for a high-rise building having a tube frame as a main frame, and in particular, a high-rise building having a relatively large floor area such as a high-rise apartment house. Suitable for

A Panel zone block B Fixing bolt C, 20 Support column D Mechanical joint O Star wrap C hoop key Screw rebar C Grout material Co Relay bolt S Splice sleeve S Iron plate S Welded part Spiral hoop Saw rebar H Branched bar H Beam (On-site concrete beam)
Steel angle TE Floor half PC slab na Beam reinforcement D Square steel pipe Ne High-strength concrete No grout injection hole H slab anchor bar Hi mortar floor (in-place concrete floor)
F Column vertical adjustment bolt E Base plate Ma Insertion connection core rebar M Beam form A Outer tube frame B Inner tube frame C Core tube frame 1 Pile 2 Foundation bottom slab 3 First floor slab 4 Column beam of outer tube frame 5 Core tube frame Core wall 6 Inner floor slab 7 Outer floor slab 8 Step beam (inner tube frame)
9 Conventional support column 10 Megastructure inner tube structure 11 Megastructure outer tube structure 12 Megastructure beam 9a Thick steel tube 9b Concrete 9c Steel plate 9d Fixing bolt 9e Rebar 100 Structure of high-rise building

Claims (4)

Support pillars used for high-rise buildings,
It consists of a steel pipe concrete column filled with concrete inside the steel pipe and a core reinforcement with spiral reinforcement, and the base plate is welded to the upper and lower ends of this steel pipe concrete column .
Wherein provided on the upper and lower ends of the steel pipe concrete column, said outer periphery of another of said steel concrete pole by inserting the core reinforcement made of a mechanical joint and threaded rebar panel zone block constituted by iron and the panel zone block Support pillar for high-rise buildings, characterized in that it is connected and fixed via a base plate so that axial force can be received with a small cross section.   The support column for a high-rise building according to claim 1, wherein at least one of a beam reinforcing bar and a slab anchoring bar is joined to the panel zone block by a mechanical joint. A method for constructing a support pillar for a high-rise building according to claim 1 or 2,
A high-rise building characterized in that a core reinforcing bar protruding from the lower surface of the steel pipe concrete column is inserted into a splice sleeve provided on the upper surface of the panel zone block, and the steel pipe concrete column is connected and fixed to the panel zone block. How to build support pillars for your company.   The method for constructing a support column for a high-rise building according to claim 3, wherein a grout material is filled in a gap between the splice sleeve and the core reinforcing bar.

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