JPH0749680B2 - Construction method of precast steel reinforced concrete structure - Google Patents

Description

TECHNICAL FIELD The present invention relates to a construction method for a precast steel-framed reinforced concrete structure.

(Prior Art) Conventionally, when constructing a frame in a steel-framed reinforced concrete structure, a steel-framed column formed by projecting a joint part forming a part of the beam to the steel-framed column of section 1, a steel-framed beam of a transverse member, a steel frame After processing small beams in advance at the factory and bringing them to the site, the pillars are lifted by a lifting machine.
After constructing the beams and girders in this order, and after arranging the column main bars, hoop reinforcements, beams, and girder reinforcements from the lower layer, assemble the columns, beams, girders, and floor formwork, and arrange the floor reinforcements. The method of placing concrete after reinforcement and constructing the upper-layer frame one by one, and the composite construction method in which beams are made into PC and various labor-saving construction methods are applied to the floor in addition to the above factory processing are adopted. There is.

(Problems to be solved by the invention) However, in the above-mentioned conventional method, except for the processing of the steel frame as in the former, all work is done by steel frame erection work, rebar work, and formwork work. There is still a lot of work left to do even if the computer is turned into a PC.

Such field work still relies on many types of work and labor, but in recent years, there has been a chronic shortage of construction workers and special skills, ensuring the desired performance, proper process control, and safety. There is a problem that it is difficult to manage.

The present invention has been proposed in view of the above problems of the prior art, and the purpose thereof is to reduce the number of pillars and beams, as well as the column-beam joints to PC, to save labor in the field work and to carry out construction work. It is to provide a construction method and a construction member for a precast steel-framed reinforced concrete structure capable of solving the shortage of workers and skilled workers and ensuring the desired performance.

(Means for Solving the Problems) In order to achieve the above object, the construction method according to the present invention is
In the upper and lower ends of the pillar, there are joint boxes surrounding the upper and lower ends of the pillar steel frame, and in the lower end, there are embedded columns for connecting the main columns of the columns, and the upper ends of the main columns of the columns connected to the sleeves are above the columns. After setting the precast steel reinforced concrete column member protruding in the predetermined position, stud bolts are erected at the vertically protruding ends of the column steel frame, and a part of the steel beam is projected from the center of the column steel frame. Along with the column main member penetrating lower end projecting end of the precast steel-framed reinforced concrete column-beam joining member having the same cross-section as the pillar member in which the vertical main-column-penetrating penetrating vertical sleeve and the beam upper-end-piercing horizontal sleeve are embedded, A vertical three-column vertical penetration rod for penetrating the column main bar in the joint member so that the column main bar protruding from the upper end of the column member protrudes from the upper end of the column-beam joint member. Penetrate into, and is configured to inject a non-shrink mortar in the pillar main reinforcement through vertical sleeve and said junction boxes.

The invention of claim 2 joins the precast steel-reinforced concrete beam to the steel beam projecting from the central portion of the column steel in the precast steel-reinforced concrete beam-column joining member, and joins the upper end bars of the precast steel-reinforced concrete beam to the beam-column joint. It is configured to penetrate a horizontal sleeve for penetrating the beam upper end of the member and to inject non-shrink mortar into the sleeve.

(Operation) According to the present invention, as described above, in the joining box surrounding the pillar steel frames embedded in the upper and lower ends of the precast steel reinforced concrete column member, the stud bolts at the upper and lower ends of the precast steel reinforced concrete column beam joining member are provided. Since the projecting end of the pillared steel frame is fitted and the non-shrinking mortar is injected, the axial force borne by each steel frame depends on the supporting pressure between the stud bolt and the mortar that are planted on the steel frame. The adhesive force is transmitted, and the adhesive force is transmitted to the mortar and the steel frame as a frictional force.

The bending moment is the adhesive force between the mortar and the steel frame flange parallel to the bending axis, and the shearing force of the member is transmitted by the frictional force between the mortar and the column steel frame through the adhesive force between the stud bolt and the mortar, thus The precast steel rebar column member and the beam-column joint member are integrally joined.

In addition, a vertical main sleeve penetrating vertical sleeve embedded in the same column-beam connecting member penetrates the upper end protruding portion of the main column connecting bar embedded in the lower end of the column member, and By injecting shrinkage mortar, the column main bar is integrally embedded over the column member and the beam-column joint member, and the upper end projecting portion of the column main bar from the column-beam joint member is an upper layer precast cast steel reinforced concrete column. The precast cast steel-framed reinforced concrete column members of the upper layer and the lower layer are joined to each other through the beam-column joining member by mounting the column main-bar joining sleeve in the member and injecting non-shrink mortar into the sleeve.

According to the invention of claim 2, the precast steel-reinforced concrete beam is joined to the steel beam projecting from the central portion of the column steel in the precast steel-reinforced concrete beam-joining member, and the beam upper end bar in the precast steel-reinforced concrete beam is connected. The precast steel-framed reinforced concrete column-beam joint member is pierced through a beam upper end piercing horizontal sleeve embedded in the beam-joint member, and by injecting non-shrinkable mortar into the sieve, the precast steel-framed reinforced concrete column-beam joint member is used to precast steel-framed reinforced concrete Beams are integrally joined to precast steel reinforced concrete columns.

(Examples) The present invention will be described below with reference to illustrated examples.

(A) is a precast steel-framed reinforced concrete column, and at the upper and lower ends thereof, a bonding box (2) surrounding the upper and lower ends of the column steel frame (1) is embedded, and the box (2) is attached to the column steel frame (1). Welded (w). (See FIGS. 7 and 8) Further, a column main bar connecting sleeve (3) is embedded in the lower end position of the column main bar, and the column main bar (4) joined to the sleeve (3) is above the upper end face of the column. The hoop streak (5) is laid out while protruding up to the floor.

(B) is a precast steel-framed reinforced concrete beam-column joint member, in which a stud bolt (7) is erected on the vertically projecting end (6a) of the column steel frame (6), and X from the middle part of the column steel frame (6). , A steel frame beam (8) protruding in both Y directions, and a vertical sleeve (9) for penetrating the column main bar and a horizontal sleeve (10) for penetrating the beam upper end bar are embedded.

Then, the pillar steel frame projecting end (6a) at the upper end of the column-beam joining member (B) on the lower floor is fitted into the joining box (2) at the lower end of the column member (A), and the pillar main bar The projecting end of (4) is fitted to the column main-bar joining sleeve (3) of the column member (A), and a non-shrink mortar (a) is placed between the sleeve (3) and the joining box (2). By filling, the pillar member (A) is integrated with the pillar-beam joining member (B) on the lower floor, and is joined to the pillar member on the lower floor through the joining member (B).

Thus, the pillar steel frame projecting end portion (6a) at the lower end of the beam-column joining member (B) is fitted into the joining box (2) at the upper end portion of the column member (A), and the pillar member (A ), The projecting end of the column main bar (4) is penetrated into the column main beam penetrating vertical sleeve (9) of the beam-column joining member (B), and the sleeve (9) and the box (2) for joining do not shrink. The column member (A) and the beam-column joining member (B) are integrally joined by filling the mortar (a).

After hardening of the mortar (a), the beam steel frame (11) of the precast steel-framed reinforced concrete beam (C) and the projecting steel beam (8) of the beam-column joining member (B) are joined together by a joint plate (12) and bolts. (13), and at the beam (C) part, parallel to the installation of the slab plate, the lower beam beam (14)
(S) is joined, and the beam upper end streak (15) is arranged so as to penetrate the beam upper end streak penetrating horizontal sleeve (10) of the beam-column joining member (B). After injecting shrinkage mortar and assembling the form, the concrete above the beam and the connecting concrete are placed. In the figure, (16) is a tap (8a), which is a bolt hole.

Thereafter, the same steps as described above are repeated to construct a precast steel-framed reinforced concrete structure.

FIG. 10 shows another embodiment of the present invention, in which the column member (A) and the beam-column joining member (B) are combined to form a PC column with a PC beam (A ₁ ) on the first floor. Then, a box (2) for joining is embedded in the lower end of the same column (A ₁ ), and the upper end is configured to be joined to the upper column member by the projecting end (6 a) of the column steel frame (6). .

FIG. 11 shows still another embodiment of the present invention, in which the pillar (A ₂ ) is a pillar of a plurality of floors having a plurality of layers of the column joining member (B).

(Effects of the Invention) According to the present invention, as described above, in the joining boxes embedded in the upper and lower ends of the precast steel reinforced concrete column member, the stud bolts are erected in the column steel frame of the precast steel reinforced concrete column beam joining member. While fitting the end protrusions, the column main bar penetrating protrusions connected to the column main bar connecting sleeves in the column members are passed through the column main bar penetrating vertical sleeves embedded in the joint members, and the sleeves and the joints The column member and the beam-column joining member are integrated by injecting non-shrink mortar into the box for use,
Precast steel reinforced concrete column members as well as beam-column joints are prefabricated so that precast steel reinforced concrete structures can be constructed more rationally, labor is saved on site, and man-hours are reduced. It is possible to improve work safety by eliminating the shortage of personnel, the delay of processes, and the deterioration of accuracy.

In the invention of claim 2, the precast steel-reinforced concrete beam is joined to the steel beam projecting from the middle of the column steel in the precast steel-reinforced concrete beam-column joining member, and the upper end streaks of the beam are connected to the beam of the column-beam joining member. The precast steel-framed reinforced concrete columns and beams can be firmly joined by penetrating the horizontal sleeve for penetrating the upper end muscles and injecting non-shrinkable mortar into the sleeve, which saves on-site work and improves construction efficiency. The accuracy can be improved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an implementation state of an embodiment of a construction method of a precast steel-framed reinforced concrete structure according to the present invention. FIG. 1 is a view taken along the line I--I of FIG. 2, and FIG. Fig. 1 view II-II, Fig. 3 is a front view of a precast steel reinforced concrete column member, Fig. 4 is a longitudinal sectional view showing the column base, and Fig. 5 is a front view of a precast steel reinforced concrete column beam joint member. 6 and 6 are cross-sectional plan views showing the joint portion between the column member and the beam-column joint member, and are views VI-V in FIG.
FIG. I, FIG. 7 are views VII-VII in FIG. 6, FIG. 8 is a view VIII-VIII in FIG. 6, and FIG. 9 is the pillar member erected by the method of the present invention. FIG. 10 is a front view of a beam-column joint member, and FIGS. 10 and 11 are front views showing other respective embodiments. (A) ... Precast steel-framed reinforced concrete column members,
(B) …… Precast steel-framed reinforced concrete beam-column joining member, (C) …… Precast steel-framed reinforced concrete beam, (1) …… Column steel frame, (2) …… Box for joining,
(3) …… Sleeve for connecting main pillars, (4) …… Main pillar,
(6) …… Column steel frame, (6a) …… Column steel frame protruding end,
(7) …… Stud bolt, (8) …… Studded steel beam, (9) …… Vertical sleeve for penetration of column main bar, (10) ……
Horizontal sleeve for beam upper end reinforcement, (15) …… Beam upper end reinforcement,
(A) ... Non-shrink mortar.

Claims (2)

[Claims] 1. A joining box surrounding the upper and lower ends of a column steel frame is embedded in the upper and lower ends of a column, and a column main-bar joining sleeve is embedded in the lower end of the column, and the main columns of the column are connected to the sleeve. After setting the precast steel-framed reinforced concrete column member with the upper end protruding above the pillar in place, stud bolts were planted at the vertically protruding ends of the pillar steel frame, and part of the steel beam from the center of the pillar steel frame. With the projecting, the pillar main bar penetrating vertical sleeve and the beam upper end bar penetrating horizontal sleeve for embedding a horizontal sleeve for pre-cast steel frame reinforced concrete column beam joint member of the same cross section as the pillar member, the pillar steel frame lower end projecting end portion, Fits in the upper joint box of the column member, and penetrates the column main bar in the column member so that the column main bar protruding from the upper end of the column member protrudes from the upper end of the column beam connecting member. Penetrating in the vertical sleeve, construction method of precast steel reinforced concrete structures, characterized by injecting the non-shrink mortar in the pillar main reinforcement through vertical sleeve and said junction boxes. 2. A precast steel reinforced concrete beam is joined to a steel frame beam projecting from a central portion of a column steel frame in the precast steel frame reinforced concrete beam-column joining member,
The method for constructing a precast steel-reinforced concrete structure according to claim 1, wherein an upper end bar of the precast steel-framed reinforced concrete beam is penetrated through a horizontal sleeve for penetrating the beam upper-end bar of the beam-column joining member, and non-shrink mortar is injected into the sleeve.