JP2616207B2 - Building construction method using reinforced concrete columns and steel beams - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial application field >> The present invention, a reinforced concrete column and a steel frame provided with a steel-reinforced composite column / beam joint in which the column is formed of reinforced concrete and the beam is formed of steel frame It relates to the construction method using beams.

<< Conventional Technology >> When a pillar is made of reinforced concrete, a beam connected to the pillar is generally made of reinforced concrete.

However, it takes time and effort to construct the formwork and remove the formwork, especially when constructing the beams.In addition, the weight of the entire building frame increases, and the height of the beams is increased, resulting in a lower ceiling. was there. Further, the processing of the remaining material after the mold is released is complicated, and it is also difficult to secure the number of workers engaged in these operations.

For this reason, recently, the beam portion is made of pure steel frame material, thereby reducing the weight, reducing the beam length, increasing the span length, and improving the work efficiency and labor saving.

<< Problems to be Solved by the Invention >> By the way, when the column is made of reinforced concrete and the beam is made of steel frame, the joint of the column and the beam, which is the connection point, is connected to the H-shaped steel flange used as the beam. Were joined together to form a joint, and then concrete was cast in a formwork.

For this reason, the reinforcing steel and the steel frame are cross-joined at the column / beam joints, impeding the fluidity of the concrete, and leaving a problem in the adhesive strength of the concrete.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an architectural construction method using a reinforced concrete column and a steel beam capable of securely connecting the reinforced concrete column and the steel beam.

<< Means for Solving the Problems >> In order to achieve the above object, a building construction method using a reinforced concrete column and a steel beam of the present invention is a method of arranging a column main reinforcing bar and a hoop reinforcing bar in a built hollow precast concrete column member. Then, the upper end of the pillar member is covered with the pillar main reinforcement, has a hollow concrete casting area communicating with the hollow portion of the pillar member, and integrally has a beam end for connecting to a steel beam. Place the pillar / beam joint that also serves as a disposal form
Then, through the pouring opening formed in the lower part of the pillar member, the inside of the pillar member is filled with ready-mixed concrete from below to the middle of the concrete casting area of the pillar / beam connection part above, and then the pillar is filled.・ A steel beam is connected to the beam end of the beam connection, and an upper deck plate is mounted on the steel beam, and concrete is cast on the steel plate to construct an upper floor slab, A hollow precast concrete column member on the upper floor is erected on the column / beam connection part, and the process of connecting the column main reinforcements is repeated to construct the column.

<< Operation >> The hollow precast concrete column member passes from the hollow portion of the column member into the hollow concrete casting area of the column / beam connection portion, and further into the column member. When the ready-mixed concrete is poured and filled to the middle of the concrete casting area, the reinforcing steel crosses and concrete is added to the joint between the column / beam connection to which the steel frame is connected and the column member immediately below. Continuously driven, then steel beams are connected to the beam ends of the columns and beam connections, and a deck plate is mounted on the steel beams and concrete is cast on it to build a floor slab And, furthermore, if a hollow precast concrete column member for the upper floor is installed, and the column member for the upper floor is also connected to the column / beam connection at the upper end, the fresh concrete is poured from below the column member. Pressurize I want to fill. At this time, concrete also flows in from the upper part of the pillar / beam joint located below, and also at the seam between the pillar member for the upper floor and the pillar / beam joint supporting the floor slab. Will not be a fault but will be continuous continuously.

Moreover, since the concrete slurry in the column member enters from below at the time of filling and filling, it does not form a mortar portion and hardens while forming a homogeneous concrete.

Since the column members and the column / beam joints do not require a formwork, no demolding work is required.

<< Embodiment >> Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings. In this embodiment, basically, the column main reinforcement 7 is provided in the hollow precast concrete column member 1 which has been erected.
After the hoop bars 8 are arranged, the column main bar 7 is covered on the upper end portion of the column member 1 to have a hollow concrete placing area 14 communicating with the hollow portion 11 of the column member 1. A column / beam joint 10 which is also used as a throw-out frame and integrally formed with a beam end portion 13 for connection is placed thereon, and then the column member 1 is inserted through an injection opening 4 formed below the column member 1. The fresh concrete 3 is injected into the inside from the lower part to the middle of the concrete placing area 14 of the column / beam joint 10 above, and then the steel beam 20 is inserted into the beam end 13 of the column / beam joint 10. The upper floor deck slab 6 is constructed by connecting the deck plate 22 on the upper floor on the steel beam 20 and placing concrete thereon, and the upper floor is placed on the column / beam connection 10. Build the hollow precast concrete column members and repeat the process of connecting the column main reinforcements 7 It has become.

FIG. 1 shows a solid concrete column 2 in which concrete is cast inside a hollow precast concrete column member 1.

Using a precast concrete formed into a hollow cylindrical body as a formwork, a fresh concrete 3 is poured into a lower portion of a hollow precast concrete column member (hereinafter, hollow PC column member) 1 for casting concrete into the inside thereof. And a pouring opening 4 for filling the ready-mixed concrete 3 from the lower side to the upper side. A bolt 5 of a mouthpiece 5 for pouring concrete is provided around the pouring opening 4 so that the floor slab 6 can be placed on site. The bar main bar 7 and the warp bar 8 are erected so as to cover the reinforcing bar.

Then, the base 5 is bolted to the injection opening 4 to form a hollow PC.
Concrete is poured into the column member 1 to obtain a solid concrete column 2.

 The injection opening 4 is filled with mortar or the like, and is post-processed.

Although only the lower portion of the solid concrete column 2 is shown in FIG. 1 for the purpose of explanation, the column / beam connection portion 10 is provided at the upper end of the solid concrete column 2.

The column / beam connection 10 is connected before concrete is poured into the hollow PC column member 1 (also referred to as a precolumn).

That is, as shown in FIGS. 2 (a) to 2 (c), first, the hollow PC column member 1 is built on the floor slab 6 which has already been constructed in (a).

As shown in FIG. 2 (b), H which fits in the axial direction of the hollow portion 11 of the hollow PC column member 1 is located at the upper end of the hollow PC column member 1.
A beam end 13 for joining steel beams made of the same H-shaped steel extending horizontally and at 90 ° intervals on the central outer peripheral surface of the longitudinal bone 12 made of a shaped steel, and further comprising the longitudinal bone 12 and the beam end 13. A rectangular frame formed by welding in an L-shape at the intersection corner portion, and having a reinforcing material that also serves as a concrete casting area 14 and a dumping form 15 at the intersection corner portion. Beam connection 10
Are linked.

The discarding formwork 15 also serves as a reinforcing material for the beam end portion 13 and defines a concrete placing area 14 for connection with the hollow PC column member 1, and equivalently forms an iron plate hoop equivalent.

The upper end of the hollow PC column member 1 is formed by inserting the column / beam connection portion 10 into the concrete casting region 14 surrounding the upper protruding end of the column main reinforcing bar 7 penetrating the four corners of the hollow portion 11 with the formwork 15. Set to.

Next, as shown in FIG. 1C and as described with reference to FIG. 1, concrete is poured from the pouring opening 4, and the poured concrete is placed in the concrete placing area 14 of the column / beam joint 10. Stop where it rises to a level near the middle of the.

Further, a floor slab on the upper floor and a hollow PC column member for the upper floor are erected at the upper end of the column / beam connection portion 10.

Since the structure of the column / beam joint 10 may be different,
The construction procedure with the upper floor will be described below while exemplifying and explaining this in FIG.

The column / beam connection 18 in FIG. 3 has a simpler structure than the column / beam connection 10 described above, has no vertical bones 12, and is made of H-shaped steel in a cross shape, and is precast at the center of the intersection. It consists of a square concrete frame 19 made of concrete,
It has a concrete casting area 14a inside.

The H-shaped steel projecting outside the concrete frame 19 corresponds to the beam end 13a of the steel beam 20 to be connected and fixed.

The column / beam connection 18 is placed on the upper end of the hollow PC column member 1a downstairs, and the hollow PC column member 1 for the upper floor is erected and fixed thereon.

That is, the column / beam connection portion 18 is placed on the upper end of the hollow PC column member 1 as it is while passing the column main reinforcement 7 through the concrete frame 19. The concrete frame 19 is placed on the upper end of the PC column member 1.

However, if the concrete is filled from the filling opening 4 and the inside of the hollow PC column member 1 is filled with concrete from the bottom to the top and the concrete is buried to about half the level of the concrete frame 19, the concrete While waiting for hardening, the steel beam 20 is connected to the beam end 13a at a stage where the strength, that is, the verticality of the hollow PC column member 1 can be maintained.

Then the deck plate 22 is moved from the steel beam 20 to the beam end 13a.
And concrete is put on the plate 22 to form the floor slab 6.

Next, similarly, when the hollow PC column member 1 for the upper floor is erected and concrete is poured from the pouring opening 4, the upper part of the column / beam connection portion 18 is gradually filled with concrete while filling. The level of concrete placement rises upward within the column members on the upper floor.

In this way, construction is performed sequentially from the lower floor to the upper floor.

<Effects> As described above in detail, according to the building method using the reinforced concrete columns and the steel beams of the present invention, the hollow precast concrete columns are connected to the hollow precast concrete column members by connecting the column / beam connections. Concrete is injected and filled from the inside of the member from the lower part to the upper column / beam connection, so that concrete aggregate can be poured without separating concrete aggregate and the column / beam connection. Since concrete can be continuously and seamlessly struck at the boundary between the mouth and the column member, there is an effect of obtaining a uniform construction quality without a fault in terms of the bonding strength between the reinforcing steel and the concrete.

In addition, since a deck plate is used, the hollow PC column member is connected to the upper floor while striking the floor slab, and concrete is filled into the concrete casting area toward the column / beam connection located below. The concrete is filled into the inside of the PC column for the upper floor without filling the column pedestal with cast concrete while forming the seamless concrete at the boundary between the column member on the upper floor and the column / beam joint. There is an effect that can be done.

Moreover, since the joints for the columns and beams use a material that also serves as a discarded formwork, the concrete forming area is not used for the columns and beams. Since it is possible to progress the construction on the upper floor by casting, it is extremely advantageous in terms of labor saving and shortening the construction period.

[Brief description of the drawings]

FIG. 1 is a sectional view for explaining a hollow precast concrete column member, FIGS. 2 (a) to 2 (c) are perspective views showing a construction procedure, and FIG. 3 uses another column / beam joint. It is a side view which illustrates the case where it did. 1. Hollow precast concrete column member 2. Solid concrete column 4. Injection opening 5, ... Base 6 ... Floor slab, 7. Column main reinforcement 8. Hoop reinforcement, 10 Column / beam connection Part 11: Hollow part, 12: Vertical bone 13: Beam end 14: Concrete casting area 15: Discarded formwork, 18: Column / beam joint 19: Concrete frame, 20 ... Steel beam 22 ... Deck plate

Claims (1)

(57) [Claims] 1. A pillar main bar and a hoop bar are arranged inside a built-in hollow precast concrete column member, and the upper end portion of the column member is covered with the column main bar to communicate with the hollow portion of the column member. A column / beam connection part having a hollow concrete casting area and integrally forming a beam end for connecting to a steel beam is also placed on the lower part of the column member. The fresh concrete is injected and filled into the interior of the pillar member from the lower part thereof to the middle of the concrete placing area of the pillar / beam connection part through the filling opening, and then the beam of the pillar / beam connection part is filled. A steel beam is connected to the end, a deck plate on the upper floor is mounted on the steel beam, concrete is poured on the steel plate to construct a floor slab on the upper floor, and the column / beam connection section A hollow precast concrete column member on the upper floor is built on top, Building construction method using reinforced concrete columns and steel beams, characterized in that by repeating the step of connecting the main reinforcement together continue to build.