JP3122850B2 - Construction method of building with basement floor with steel pipe pile foundation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a building with a basement floor provided with a steel pipe pile foundation.

[0002]

2. Description of the Related Art Conventionally, SRC (steel reinforced concrete)
For buildings with underground floors in the structure, construction of the underground part of the building will be performed first, and construction of the above ground part will start on this frame. It is built by advancing.

[0003]

However, in the case of the above-described conventional construction method of a building, there is a problem that the construction of the above-ground portion cannot be performed unless at least the construction of the underground portion is first performed. There is. In other words, the weight of the above-ground portion is supported by the underground frame by placing and installing the lower beam steel frame of the construction above-ground portion so as to wrap over the upper portion of the underground beam beam. Therefore, if the construction of the underground frame is delayed, it is difficult to support the weight of the aboveground part, and it is not possible to proceed with the construction.

[0004] The present invention has been made in view of the above-with a steel pipe pile foundation for progressing the construction of above-ground parts and underground part of the building to the concurrent increase work efficiency of the construction of the building basement It is an object of the present invention to provide a construction method for a building with floors.

[0005]

According to the method for constructing a building with an underground floor provided with a steel pipe pile foundation according to the present invention, (a) one or more steel pipe piles are driven into pillar positions of a building on the ground, and (B) placing one of the steel pipes at the pillar core so that the pile head is located below the beam of the first floor, and (b) one around the pile head of the steel pipe pile located at the pillar core. Casting a discarded concrete into the upper root bottom where the floor portion was rooted, inserting a column base into the steel pipe pile protruding from the pile head, and connecting a beam steel frame to the column base. (C) casting concrete into the steel pipe pile into which the column base has been inserted, and integrating the steel pipe pile with the column base; (d) after completion of the step (c), the first floor For the beams, slabs, and columns, the first-floor concrete is cast and the first-floor beams, slabs,
It consists of a process of constructing a reinforced concrete column incorporating a steel pipe pile and a column base, and a process of starting construction of a steel frame on the ground portion and root cutting of the underground portion after the concrete has developed strength. This is the solution to the above problem.

[0006]

According to the construction method of a building with a basement floor provided with a steel pipe pile foundation according to the present invention, a beam steel frame of the first floor of the building, a slab, and a column are provided at the pile head of the steel pipe pile located at the pillar core. The construction of the above-ground part and the root-cutting of the above-ground part allow the construction of the above-ground part and the underground part of the building to be performed in parallel.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will now be described with reference to FIGS.
This will be described with reference to FIG.

Reference numeral 1 in the drawing denotes a building constructed by a method of constructing a building with a basement floor provided with a steel pipe pile foundation according to the present embodiment (hereinafter, simply referred to as “constructing method of building”). The building 1 includes an upper structure 2 constructed on the ground T and a lower structure 3 (basement floor) constructed below the upper structure 2 in the ground T where the upper structure 2 is located. And the whole is S
It has an RC structure. As shown in FIG. 1, inside a building 1, a first column 4 vertically penetrating inside a lower structure 3, and is connected to an upper portion of the first column 4 and extends upward. A second column 5 is provided.

As shown in FIG. 2, a first steel pipe pile 4a is built in the pillar core of the first pillar 4. The first steel pipe pile 4a is driven into and fixed to the ground T below the lower structure 3. A plurality of second steel pipe piles 6 are driven around the first steel pipe pile 4a with the upper surface of the second steel pipe pile 6 being the height of the lower surface of the lower structure 3. The lower structure 3 is formed by forming an underground floor portion 3 a above the second steel pipe pile 6.

The first steel pipe pile 4a is formed in an elongated column shape, and is installed such that the pile head 4b is located below the beam 7 on the first floor of the upper structure 2. As shown in FIG.
Is disposed so as to connect the pile head 4b on the ground T,
It is configured in a lattice shape in plan view.

Hereinafter, the construction method of the building 1 will be described with reference to the construction method of the present invention. The construction method for a building according to the present embodiment includes the following steps (a) to (d). (A) First, as shown in FIG. 4, a retaining wall is previously constructed at the construction position of the ground T, and the first steel pipe pile 4 a is driven into the ground T at the position of the column core of the second column 5.

(B) Next, as shown in FIG. 4, a root is cut to install the beam 7 so as to connect the driving positions of the first steel pipe piles 4a, and a beam installation portion Ta (root cutting hole).
To form After the completion of the root cutting, as shown in FIG. 5, the first dumped concrete 8a is cast on the surface of the beam installation portion Ta, and the piled-up head 4b is also substantially parallel to the first dumped concrete 8a. The second waste concrete 8b is cast. And the pillar base 5a of the second pillar 5 is provided inside the pile head 4b.
And, as shown in FIG.
A beam steel frame 7a is installed in the column and connected to the column base 5a.

(C) After the completion of the step (b), as shown in FIG. 7, a column core concrete 8d is poured into the inside of the first steel pipe pile 4a into which the column base 5a is inserted. Steel pipe pile 4
a and the column base 5a.

(D) After the completion of the step (c), as shown in FIG. 8, the second floor 5, the beam 7 and the slab 9 are respectively reinforced and the first floor permanent concrete 8e is provided. Cast in.

As shown in FIGS. 8 and 9, the reinforcement of the second column 5 is such that the column main bar 5 b is arranged from above the second column 5.
The main reinforcement 5b is arranged at the center of the pillar main reinforcement 5b. The column main bar 5b is made of the second discarded concrete 8
b, a fixed concrete 8c is cast on the fixed concrete 8c.
Is fixed by pressing. If a sheet is previously set on the first and second discarded concretes 8a and 8b, when underground root cutting is performed, the discarded concretes 8a and 8b can be easily removed from beneath the sheet, and the surface of the frame is finished neatly. . Further, as shown in FIGS. 10 and 11, the second
The pillar 5 is constructed by inserting a mouth-shaped steel pipe 4c into the pile head 4b, pre-casting the column core concrete 8d into the first steel pipe pile 4a from the ground, and surrounding the first steel pipe pile 4a. The main reinforcement 8b is arranged, and the concrete 8e is poured.

The slab 9 is formed by an SFFG (Soil Form Flat Garter) construction method. FIG.
As shown in FIG. 2, the second discarded concrete 8 of the slab 9
The part in contact with a is laid with the main concrete 8e as a straight slope with no line.

After the main concrete 8e on the first floor has developed the strength, the root cutting of the lower structure 3 and the construction of the steel frame of the upper structure 2 are started.

According to the building construction method of this embodiment,
After the second column 5, the beam steel structure 7, and the slab 9 are constructed on the pile head 4b of the first steel pipe pile 4a, the method of building the upper structure 2 and the root cutting of the lower structure 3 are performed. Superstructure 2
And the construction of the lower structure 3 can be performed in parallel, and the work efficiency of the construction of the building 1 can be improved, thereby shortening the construction period and reducing costs such as labor costs.

[0019]

As described above, according to the method for constructing a building with a basement floor provided with a steel pipe pile foundation according to the present invention, (a)
At least one steel pipe pile is driven into the position of the pillar of the building on the ground, and one of these steel pipe piles is positioned at the pillar core and the pile head is 1
A step of installing the floor section below the beam,
(B) Concrete is poured into the steel pipe pile at the top of the steel pipe pile located at the core of the column where the first floor is cut off around the pile head, and the pillar is placed inside the steel pipe pile with the pile head protruding. A step of inserting a leg and connecting a beam steel to the column base,
(C) Casting concrete into the inside of the steel pipe pile into which the column base has been inserted, and integrating the steel pipe pile and the column base, and (d) the beam on the first floor after completion of the step (c). , Slabs, and reinforcements for pillars, placing concrete on the first floor,
Reinforced concrete with built-in beams, slabs, steel pipe piles and column bases
A steel pipe located at the core of the column, which comprises a step of constructing a reed column and a step of starting the erecting of an underground part and a method of building a steel frame above the ground after the concrete has developed strength. After constructing the beam steel frame, slab, and column on the first floor of the building at the pile head, the method of building the steel frame on the ground and cutting off the ground are used to build the ground and basement of the building. Construction can be performed in parallel,
This has the effect of improving the work efficiency of building construction, shortening the construction period and reducing costs such as labor costs.

[Brief description of the drawings]

FIG. 1 is a front view showing pillars of a building of this embodiment constructed by a construction method for a building with a basement floor provided with a steel pipe pile foundation according to the present invention.

FIG. 2 is a schematic diagram showing a first floor portion of an upper structure of the building and an underground structure.

FIG. 3 is a plan view showing a state in which a beam is constructed on a first floor portion of the upper structure.

FIG. 4 is a front view showing a step (A).

FIG. 5 is a front view showing the casting of waste concrete in the step (b).

FIG. 6 is a front view showing the connection of beam steel frames in the step (b).

FIG. 7 is a front view showing a step (c).

FIG. 8 is a front view showing a step (d).

FIG. 9 is a sectional view showing a second column.

FIG. 10 is a cross-sectional view showing an upper part of the first column.

FIG. 11 is a sectional view showing a lower portion of the first column.

FIG. 12 is a sectional view showing a slab of a first floor portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Building 2 Upper structure (1st floor part) 3 Lower structure (basement floor) 4 First steel pipe pile 4b Pile head 5 Column 6 Second steel pipe pile 7 Beam 7a Beam steel frame 8a First discarded concrete 8d Column core Concrete 8e Permanent concrete 9 Slab T Ground Ta Beam installation part (root cutting hole)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) E04G 21/14 E02D 27/00 E02D 27/14

Claims (1)

(57) [Claims] 1. A method for constructing a building with a basement floor having a steel pipe pile foundation, comprising: (a) driving one or more steel pipe piles into pillar positions of a building on the ground, A step of placing the pillar core so that the pile head is located below the beam of the first floor, and (b) rooting of the first floor part around the pile head of the steel pipe pile located at the pillar core. (C) inserting concrete into the upper root cut bottom, inserting concrete into the steel pipe pile projecting from the pile head, and connecting a beam steel frame to the column base. Casting concrete into the steel pipe pile with the legs inserted, and integrating the steel pipe pile with the column pedestal; and (d) after the completion of the step (c), the beam, slab and , and Da設the first floor of concrete to each reinforcement for the pillar
With built-in first floor beams, slabs, steel pipe piles and column bases
With a basement floor with a steel pipe pile foundation, which consists of a step of constructing a reinforced concrete column and a step of starting construction of a steel frame above the ground and root cutting of an underground part after this concrete develops strength Building construction method.