CN101806148A - Construction method for concrete beam with U-shaped steel bar connecting joints - Google Patents

Abstract

The invention relates to a construction method for concrete beam with U-shaped steel bar connecting nodes. In the method, two ends of a precast frame beam are respectively provided with a groove; reserved steel bars on the end parts of the precast frame beam are only in the grooves; a temporary support frame is erected; U-shaped steel bars are put into the grooves of the precast frame beam; the back cut of each U-shaped steel bar is provided with a steel bar which is clamped in the groove; and beam-column joint steel bars are bound and concrete is cast into the grooves, so the U-shaped steel bars make the beams and columns connected into a whole. The construction method solves the problems that connected beams are easily corroded, the pretightening and loosening are needed on large stress occasions, the cost of monitoring and maintenance at later stage is high, equipment has large volume and is difficult to move, the construction cannot be carried out in a narrow space or without a crane, the qualification rate of joints is low, the power consumption is high and the like in a bolt connecting method and a welding connecting method. The construction method has the advantages of excellent earthquake resistance, construction period conservation by 50 percent, quality guarantee, low cost and revolving material conservation.

Description

Construction method for concrete beam with U-shaped steel bar connecting joints

Technical field

The present invention relates to a kind of new concrete structure main body construction method, particularly a kind of construction method for concrete beam with U-shaped steel bar connecting joints.

Background technology

Before the present invention, in building operations, what general concrete prefabricated frame construction beam column connected employing is nothing but two kinds of methods, and a kind of is the bolt method of attachment, and another kind is the method for being welded to connect.These two kinds of connected modes all have significant disadvantages: place, bolted slit has the generation of corrosion easily, lost efficacy thereby cause to connect, and stressed bigger occasion need carry out pretension and locking, and later stage monitoring, maintenance cost are bigger; The equipment volume that is welded to connect is bigger, moves inconvenience, narrow space or do not have crane and can not construct, and the joint qualification rate is low, and power consumption is bigger, and higher to operator's technical requirements, and influenced by workman's technical level bigger for welding quality in the operation.

Summary of the invention

Purpose of the present invention just is to overcome above-mentioned defective, and a kind of construction method for concrete beam with U-shaped steel bar connecting joints is provided.

Technical scheme of the present invention is:

Construction method for concrete beam with U-shaped steel bar connecting joints, its major technique step is:

(1) at precast frame beam two ends groove is set respectively, precast frame beam end reserved steel bar is only in groove;

(2) before the lifting of precast frame beam, set up interim bracing frame earlier, and can regulate interim bracing frame height;

(3) the U-shaped reinforcing bar is put into the groove of precast frame beam, added a reinforcing bar and be stuck in the middle of the groove in that the U-shaped reinforcing bar is suitable for reading, then colligation bean column node reinforcing bar as distribution bar;

(4) fluid concrete is to design elevation in groove, and the U-shaped reinforcing bar links into an integrated entity beam, post.

Advantage of the present invention is that with effect the job practices that adopts U-shaped reinforcing bar node to be connected precast beam, post has following advantage:

1, adopting the concrete beam and column node of U-shaped steel bar connecting joints is rigid joint, and anti-seismic performance is superior, is suitable for the mode that is articulated and connected that surpasses highly far away.

2, member can be produced in factory in advance, and directly install the job site, for beam end two reserved steel bar of routine, adopts the groove type bean column node, and reinforcing bar is reserved in the groove, and the duration can save 50%;

3, compare with traditional cast-in-place structural, this kind connected mode adopts millwork production, has changed the mode of on-the-spot armrest industry control system quality, the product quality guarantee that more is easy to get, hard outer beautiful, good endurance in the member, all common quality defects that can effectively avoid cast-in-place structural to bring;

4, adopt the concrete beam with U-shaped steel bar connecting joints, the scene only needs colligation U-shaped reinforcing bar, simple installation, and construction quality is easy to control, and this connected mode cost is lower than by manual welding connecting mode about 30%;

5, do not need template substantially, support and reduce more than 50%, save the circulation material total amount and reach 60%-80%;

6, reduce job site wet trade amount, help environmental protection, alleviate noise pollution, site operation is civilization more, satisfies the trend of national development low-carbon economy fully.

Job practices of the present invention is reliable, effective, economical, firm.

Other advantages of the present invention and effect will go on to say below.

Description of drawings

Fig. 1--structural principle schematic diagram of the present invention.

The specific embodiment

As shown in Figure 1:

Precast frame beam 2 two ends are provided with groove 3, and U-shaped reinforcing bar 4 is placed in the groove 3, utilize U-shaped reinforcing bar 4 that precast frame beam 2 and post 1 are linked together by fluid concrete.

The job practices explanation:

Hoisting prefabricated Vierendeel girder 2 is in place, and U-shaped reinforcing bar 4 is put into the groove 3 of precast frame beam 2, and placing of concrete links into an integrated entity U-shaped reinforcing bar 4 and post 1.

At precast frame beam 2 two ends groove 3 is set respectively, beam end reserved steel bar (anchor rib) only limits to not expose in the groove 3, with convenient on-the-spot the installation;

Before the lifting of precast frame beam, set up interim support earlier, and regulate bearing height, to guarantee the in place accurate of precast frame beam according to the control absolute altitude;

U-shaped reinforcing bar 4 is put into the groove 3 of precast frame beam 2, for guarantee U-shaped reinforcing bar 4 positions accurately, add a reinforcing bar and be stuck in the middle of the groove 3 in that U-shaped reinforcing bar 4 is suitable for reading, then colligation bean column node reinforcing bar as distribution bar;

It is moistening that pouring groove 3 concrete should shift to an earlier date 24 hours and water, and adopts the high grade microdilatancy pea gravel concreten and the vibration compacting of being sure to, and concreting utilizes the U-shaped reinforcing bar that beam, post are linked into an integrated entity to design elevation.

Claims (1)

1.U the construction method for concrete beam of shape steel bar connecting joints, its step is:

(1) at precast frame beam two ends groove is set respectively, precast frame beam end reserved steel bar is only in groove;

(2) before the lifting of precast frame beam, set up interim bracing frame earlier, and can regulate interim bracing frame height;

(3) the U-shaped reinforcing bar is put into the groove of precast frame beam, added a reinforcing bar and be stuck in the middle of the groove in that the U-shaped reinforcing bar is suitable for reading, then colligation bean column node reinforcing bar as distribution bar;

(4) fluid concrete is to design elevation in groove, and the U-shaped reinforcing bar links into an integrated entity beam, post.