CN102704603A

CN102704603A - Concrete superposed beam

Info

Publication number: CN102704603A
Application number: CN2012101992791A
Authority: CN
Inventors: 周绪红; 吴方伯; 袁海梅; 黄海林; 陈伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-06-15
Filing date: 2012-06-15
Publication date: 2012-10-03

Abstract

The invention discloses a concrete superposed beam which comprises a precast beam (1), precast component plates (8), an erection bar (9) and a concrete superposed layer (10), wherein a longitudinal stressed reinforcing steel bar (5) and a hooping bar (3) are embedded in the precast beam (1); a groove (2) with a U-shaped section is arranged on the end part of the precast beam (1); when a precast floor slab is spliced, the precast component plates (8) are placed on two sides of the precast beam (1) along the longitudinal direction; the erection bar (9) is bound on the hooping bar (3); the concrete superposed layer (10) is wholly cast in-place on the precast component plates (8) and the precast beam (1), thereby forming a concrete superposed beam system; the precast beam (1) is convenient to industrially produce, is high in strength and is difficult to damage during a hoisting construction process; a hollow precast beam (1) is conveniently precast, so that the dead weight of the beam is relieved; and the effective high-strength connection at a joint of a beam column is ensured by the U-shaped groove (2) on the end part of the precast beam (1). The concrete superposed beam is suitable for the field of common industry and civil architecture.

Description

A kind of concrete folding beam

Technical field

The present invention relates to building field, specifically refer to a kind of concrete folding beam.

Background technology

So-called superposed beam be the beam of disturbing concrete at twice, and carry out the first time in precasting yard, makes precast beam; Carry out at the construction field (site) for the second time, after precast member board is shelved on the precast beam, waters the concrete of smashing beam top again and make floor and beam connect into integral body.How precast beam is made T section or square-section at present, but it is from great, the lifting transportation is inconvenient, and the bean column node place connects weakness.A kind of precast member for reinforcing bar concrete (notice of authorization CN 2641169Y) that is used for superposed beam comprises steel concrete flute profile prefabricated units; This prefabricated units are from heavy and light, non-frangible, convenient transportation, and fluid concrete just can form the concrete folding beam in the prefabricated units groove.But it is not enough below this precast member for reinforcing bar concrete exists: flute profile prefabricated units cracky when 1, lifting.Because flute profile prefabricated units intensity is not high, need install more support, waste of manpower when 2, constructing in the prefabricated units bottom.3, can not form hollow parts during prefabricated units.

Summary of the invention

In view of this, the invention provides a kind of concrete folding beam, this superposed beam comprises precast beam, precast member board, handling reinforcement, concrete folding layer, and said precast beam end is set to the groove that section form is a U-shaped.This precast beam is convenient to batch production production; Intensity is high; The lifting construction process is cracky not; Only need during construction that Zhi Shaoliang supports in the precast beam bottom, it can be prefabricated into hollow precast beam alleviating the beam deadweight form of this precast beam decision simultaneously, and the U-shaped groove of precast beam end can guarantee the effectively high-strength connection of bean column node place.This precast beam is with to shelve the beam slab system globality that the precast member board on it together is built up good.

To achieve these goals; The present invention adopts following technical scheme: a kind of concrete folding beam comprises precast beam, precast member board, handling reinforcement, concrete folding layer; Be embedded with longitudinal stress reinforcing bar, stirrup in the precast beam, it is characterized in that the precast beam end is set to the groove that section form is a U-shaped.

Further in technical scheme of the present invention, horizontal parallel sided forms the angle greater than 0 in vertical guide or with vertical guide in the said precast beam beam-ends groove, and horizontal side is provided with built-in fitting; When said precast beam deck-siding is big, in the middle of the precast beam end recesses, add longitudinal rib; In the stirrup bottom was embedded at the bottom of the precast beam beam, exposed outside the precast beam on top, and the stirrup form is two limb hoops or many limbs hoop, and the cover muscle is arranged at stirrup top; Precast beam beam body is made as hollow parts, and the end plug is established in the hollow parts termination.

Concrete folding beam provided by the invention is through effective high-strength connection of groove realization beam with the post of its precast beam end U-shaped.Because precast beam beam body has enough intensity, makes precast beam not be damaged in the lifting construction process, do not need at the bottom of the precast beam beam, to install more support at work progress simultaneously.In precast beam, be provided with hollow parts when prefabricated, the deadweight that has alleviated beam greatly, the cost of reduction precast beam.This precast beam is made simple and fast, but mass production, and globality is good behind this precast beam and the sheet-pile integral cast-in-situ simultaneously, can extensively be suitable for industry and civilian construction field.

Description of drawings

In the following accompanying drawing, 1 is precast beam, and 2 is groove, and 3 is stirrup; 4 is built-in fitting, and 5 is the longitudinal stress reinforcing bar, and 6 is longitudinal rib, and 7 are the cover muscle; 8 is precast member board, and 9 is handling reinforcement, and 10 is the concrete folding layer, and 11 is transverse reinforcement; 12 is horizontal side in the

groove

2, and 13 is precast beam 1 hollow parts, and 14 is the end plug.

Fig. 1 is the precast beam structural representation;

Fig. 2 is a precast beam beam-ends U-shaped groove structure sketch map;

Fig. 3 is another embodiment of precast beam beam-ends U-shaped groove;

Fig. 4 is another embodiment of precast beam beam-ends U-shaped groove;

Fig. 5 is for adding the precast beam structural representation of longitudinal rib in the middle of the end recesses;

Fig. 6 (a) is a pre-buried stirrup structural representation in the precast beam;

Fig. 6 (b) is another embodiment of pre-buried stirrup in the precast beam;

Fig. 6 (c) is another embodiment of pre-buried stirrup in the precast beam;

The precast beam structural representation that Fig. 7 is the four limbs hoop for pre-buried stirrup form;

Fig. 8 is provided with the precast beam structural representation of hollow parts for the beam body;

Fig. 9 is provided with another embodiment of precast beam of hollow parts for the beam body;

Figure 10 is Fig. 9 precast beam 1-1 portion face sketch map;

Figure 11 is held on precast beam roof construction sketch map for precast member board;

Figure 12 is precast member board and precast beam integral cast-in-situ concrete folding layer structural representation;

The specific embodiment

Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is described further.

The present invention is shown in accompanying drawing 1～12.

A kind of concrete folding beam comprises precast beam 1, precast member board 8, handling reinforcement 9, concrete folding layer 10, is embedded with longitudinal stress reinforcing bar 5, stirrup 3 in the precast beam 1, and said precast beam 1 end is set to the groove 2 that section form is a U-shaped, and is as shown in Figure 1.Horizontal side 12 is provided with built-in fitting 4 in the precast beam 1 beam-ends groove 2; Behind the precast beam 1 cast-in-situ concrete overlapping layers 10; Built-in fitting 4 parts are embedded in the precast beam 1, and a part has increased the adhesion stress of precast beam 1 with in-situ layer greatly in cast-in-place overlapping layers 10; Make that the superposed surfaces bonding of superposed beam is firm, holistic resistant behavior is good.

Shown in Fig. 2 ~ 4, be precast beam beam-ends U-shaped groove structure sketch map.Generally horizontal side 12 in the precast beam 1 beam-ends groove 2 is set to be parallel to the form of vertical guide; But in order to strengthen the contact area of precast beam 1 and concrete folding layer 10; Strengthen the adhesion stress of new-old concrete, can interior horizontal side 12 be made as with vertical guide and form angle greater than 0.The form that in like Fig. 3 being lean forward in horizontal side 12; This inclination mode is in the contact area that strengthens precast beam 1 and concrete folding layer 10; Because the dowel action of cast-in-situ concrete in the groove 2 makes the shear resistance of superposed beam strengthen, bean column node place intensity improves.Fig. 4 be in the form of horizontal side 12 hypsokinesis.

Fig. 5 is for adding precast beam 1 structural representation of longitudinal rib 6 in the middle of the end recesses 2.When precast beam 1 deck-siding is big,, in the middle of precast beam 1 end recesses 2, add longitudinal rib 6 in order to guarantee the bulk strength of precast beam 1.

As shown in Figure 6, pre-buried stirrup 3 forms can be two limb hoops or many limbs hoop or stirrup 3 tops in precast beam 1 has the cover muscle, and Fig. 6 (a) is the form of two limb hoops, and Fig. 6 (b) is a four limbs hoop form, the form that Fig. 6 (c) establishes cover muscle 7 for two limb hoop tops.Be set to many limbs hoop or establish cover muscle 7, purpose is that the shearing resistance that increases superposed beam turns round ability, makes that the superposed beam holistic resistant behavior is good.Fig. 7 is precast beam 1 structural representation of joining the four limbs hoop, and in stirrup 3 bottoms were embedded at the bottom of precast beam 1 beam, exposed outside the precast beam 1 on top.

In order to alleviate the deadweight of precast beam 1, reduce production costs, can be set to hollow parts 13 by precast beam 1 beam body.Fig. 8 is the pre-buried hollow section in precast beam 1 beam body middle part, and hollow precast beam 1 structural representation that end plug 14 forms is established in the hollow section end.Fig. 9 for beam body middle part vertically integral body empty and form hollow parts 13, hollow parts 13 penetrates into horizontal side 12 in the groove 2, with end plug 14 block extend in the hole of horizontal side 12, prevent cast-in-situ concrete inflow hollow parts 13.Figure 10 is Fig. 9 precast beam 1-1 portion face sketch map.

Figure 11 is held on precast beam 1 roof construction sketch map for precast member board 8; During the precast floor slab assembly unit; Precast member board 8 is shelved on precast beam 1 vertical both sides,, handling reinforcement 9 colligations is being preset on the stirrup 3 piecing together layout transverse reinforcement 11 and distribution bar on the good precast member board 8; Shown in figure 12, integral cast-in-situ concrete folding layer 10 forms concrete folding beam slab system on precast member board 8 and precast beam 1.

Claims

1. a concrete folding beam comprises precast beam (1), precast member board (8), handling reinforcement (9), concrete folding layer (10); Be embedded with longitudinal stress reinforcing bar (5), stirrup (3) in the precast beam (1), it is characterized in that: precast beam (1) end is set to the groove that section form is a U-shaped (2).

2. concrete folding beam according to claim 1 is characterized in that: horizontal side (12) are parallel to vertical guide or form the angle greater than 0 with vertical guide in precast beam (1) the beam-ends groove (2), and horizontal side (12) are provided with built-in fitting (4).

3. concrete folding beam according to claim 1 is characterized in that: when said precast beam (1) deck-siding is big, in the middle of precast beam (1) end recesses (2), add longitudinal rib (6).

4. concrete folding beam according to claim 1; It is characterized in that: in stirrup (3) bottom is embedded at the bottom of precast beam (1) beam; Expose outside the precast beam (1) on top, and stirrup (3) form is two limb hoops or many limbs hoop, and cover muscle (7) is arranged at stirrup (3) top.

5. concrete folding beam according to claim 1 is characterized in that: precast beam (1) beam body is provided with hollow parts (13), and end plug (14) is established in hollow parts (13) termination.