CN210798063U

CN210798063U - Prefabricated main beam for cross beam

Info

Publication number: CN210798063U
Application number: CN201921360867.2U
Authority: CN
Inventors: 张剑; 杨江
Original assignee: Changsha Broad Homes Industrial Anhui Co ltd
Current assignee: Changsha Broad Homes Industrial Anhui Co ltd
Priority date: 2019-08-20
Filing date: 2019-08-20
Publication date: 2020-06-19
Anticipated expiration: 2029-08-20

Abstract

The utility model discloses a prefabricated main beam for a cross beam, wherein the top surface of the prefabricated main beam is provided with a through groove matched with the end part of a prefabricated secondary beam, and the through groove is formed along the width direction of the prefabricated main beam; and the prefabricated main beam is provided with a connecting piece for connecting prefabricated main beam sections at two sides of the through groove. Before the construction of the cross beam, the prefabricated girder sections on two sides of the through groove of the prefabricated girder are connected by adopting the connecting piece, so that the cracking of the connecting section below the through groove in the transportation and hoisting processes of the prefabricated girder can be avoided.

Description

Prefabricated main beam for cross beam

Technical Field

The utility model belongs to the technical field of the building structure, especially, relate to a precast girder for cross beam.

Background

Due to the reasons of complex formwork support, high prefabrication construction operation difficulty, inconvenience in transportation and the like, the cross beam generally does not meet the integral prefabrication and can only be cast in situ. However, the cast-in-place process needs a large amount of manpower and material resources, has a long construction period, and does not accord with the green energy-saving and environment-friendly principle.

CN201510875125.3 discloses a mortise type concrete superposed beam cross connection structure, including female roof beam and public roof beam, reserve on female roof beam and have the tongue-and-groove. However, in practical application, the structural beam with the open groove is found to be easy to crack at a connecting section below the through groove in transportation and construction, particularly in hoisting.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome prior art not enough, provide a can avoid transportation and the construction in the junction fracture risk precast girder for cross beam.

In order to solve the technical problem, the utility model discloses a following technical scheme:

a prefabricated main beam for a cross beam is characterized in that a through groove matched with the end part of a prefabricated secondary beam is formed in the top surface of the prefabricated main beam, and the through groove is formed in the width direction of the prefabricated main beam; and the prefabricated main beam is provided with a connecting piece for connecting prefabricated main beam sections at two sides of the through groove.

Before construction, the prefabricated main beam sections on two sides of the through groove are connected by adopting the connecting piece, so that the cracking of the connecting section below the through groove in the transportation and hoisting processes of the prefabricated main beam can be avoided.

As a further improvement of the above technical solution:

the connecting piece including pre-buried in girder construction reinforcing bar in the prefabricated girder, girder construction reinforcing bar runs through two lateral walls that lead to the groove. The main beam structure steel bars serve as connecting pieces before construction, and the connecting strength of the prefabricated main beam sections on two sides of the through groove in the transportation and hoisting process of the prefabricated main beam can be improved. After the prefabricated main beam is hoisted in place, the construction steel bars in the through grooves are sheared, and then the construction of the crossed beam can be carried out. Design benefit, and the work load that the reinforcing bar was laid before still reducible precast girder was prefabricated.

For the joint strength of the prefabricated girder section that leads to groove both sides among the further improvement prefabricated girder transportation and the hoist and mount process, the connecting piece still includes the connecting plate, the connecting plate is located on prefabricated girder is along at least one side of width direction. And after the prefabricated main beam is hoisted in place, the connecting plate is dismantled.

For avoiding destroying the overall structure after the precast girder is poured, precast girder with pre-buried sleeve group has on the side that the connecting plate corresponds, sleeve group includes two sleeves, and two sleeves divide and locate logical groove along precast girder length direction's both sides, connecting plate and two sleeves all pass through bolted connection.

The sleeve group is provided with a plurality of groups, and the plurality of groups of sleeve groups are distributed from top to bottom along the vertical direction.

The connecting plates are provided with a plurality of connecting plates, and the plurality of connecting plates correspond to the plurality of sleeve groups one to one.

A plurality of girder stirrups which are arranged at intervals along the length direction of the prefabricated girder are pre-buried in the prefabricated girder, and the upper parts of the girder stirrups extend out of the prefabricated girder.

The main beam structure steel bars penetrate through two end faces of the prefabricated main beam along the length direction, and the main beam structure steel bars and the main beam stirrups are bound or welded and fixed.

The prefabricated main beam is embedded with main beam bottom ribs arranged along the length direction of the prefabricated main beam, the main beam bottom ribs are positioned below the through grooves, and the bottom of the main beam hoop is hooped on the outer side of the main beam bottom ribs.

Compared with the prior art, the utility model has the advantages of:

the prefabricated girder sections on two sides of the through groove are connected by adopting the connecting piece before the prefabricated girder is hoisted, so that the cracking of the connecting section below the through groove in the transportation and hoisting processes of the prefabricated girder can be avoided.

Drawings

Fig. 1 is the utility model discloses the structure schematic diagram of precast main girder for cross beam.

Fig. 2 is the utility model discloses prefabricated girder is used for the structural schematic diagram of cross beam assembly (not pour cast-in-place layer).

Fig. 3 is a front sectional view of the junction of the cross beams according to the embodiment of the present invention.

Fig. 4 is a side sectional view of a cross beam junction in accordance with an embodiment of the present invention.

Illustration of the drawings: 1. prefabricating a main beam; 11. a through groove; 12. a main beam stirrup; 13. girder gluten; 14. a main beam bottom rib; 15. a main beam construction steel bar; 2. prefabricating a secondary beam; 21. an end face; 22. a secondary beam stirrup; 23. secondary beam gluten; 24. a secondary beam bottom rib; 25. an anchoring member; 26. constructing a steel bar by using the secondary beam; 3. pouring a space; 4. a cast-in-place layer; 5. a sleeve; 6. a connecting plate; 7. and (4) bolts.

Detailed Description

The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.

Example 1:

as shown in fig. 1, in the prefabricated main beam for the cross beam of the present embodiment, a through groove 11 matched with an end portion of the prefabricated secondary beam is formed in a top surface of the prefabricated main beam 1, and the through groove 11 is formed in a width direction of the prefabricated main beam 1.

As shown in fig. 1, a plurality of sets of sleeve groups are pre-embedded in two side surfaces of the prefabricated main beam 1 in the width direction, each set of sleeve group comprises two sleeves 5, the two sleeves 5 are respectively arranged on two sides of the through groove 11, and the plurality of sets of sleeve groups are distributed from top to bottom in the vertical direction.

Before the assembly of crossing beam, for avoiding prefabricated girder 1 transportation and hoist and mount in-process to lead to the linkage segment fracture of groove 11 below, adopt a plurality of connecting plates 6 with multiunit sleeve group one-to-one will lead to the prefabricated girder section connection of groove 11 both sides, connecting plate 6 adopts the steel sheet, and bolt 7 is established along 1 length direction's of prefabricated girder both ends to connecting plate 6, and bolt 7 is connected fixedly with corresponding sleeve 5.

The prefabricated girder 1 is pre-buried in having multiunit girder structure reinforcing bar group, and multiunit girder structure reinforcing bar group is from last to arranging down, and every girder structure reinforcing bar group comprises many girder structure reinforcing bars 15 along 1 width direction interval arrangement of prefabricated girder, and girder structure reinforcing bar 15 arranges and all runs through two sides along length direction of prefabricated girder 1 along the length direction along prefabricated girder 1. The main beam construction steel bars 15 in the through slots 11 also serve to connect the prefabricated main beam sections on both sides of the through slots.

In addition, a plurality of girder stirrups 12 arranged along the length direction of the prefabricated girder 1 at intervals are pre-embedded in the prefabricated girder 1, and the girder stirrups 12 are vertically arranged and the upper parts of the girder stirrups extend out of the prefabricated girder 1. The bottom layer of main beam structural steel bar is a main beam bottom bar 14, the main beam bottom bar 14 is positioned below the through groove 11, and the bottom of the main beam hoop 12 is hooped on the outer side of the main beam bottom bar 14 and is bound or welded and fixed. And the rest reinforcing steel bars are bound with the main beam stirrups 12 or are welded and fixed.

The construction process of using the prefabricated main beam of the embodiment for preparing the cross beam is as follows:

s1: the prefabricated main beam 1 and the prefabricated secondary beam 2 are prefabricated in a factory. And pre-buried sleeve 5 in the prefabrication process of prefabricated girder 1, connect fixedly with connecting plate 6 the prefabricated girder section that leads to groove 11 both sides after the prefabrication.

S2: assembling the prefabricated main beam 1 and the prefabricated secondary beam 2 on site, firstly hoisting the prefabricated main beam 1 with the through groove 11, after the prefabricated main beam 1 is hoisted to a corresponding installation position, removing the connecting plate 6 at the through groove 11 of the prefabricated main beam 1, shearing off the main beam construction steel bars 15 in the through groove 11 (the main beam construction steel bars 15 are shown, the main beam construction steel bars 15 are reserved in the figure 4, and the main beam construction steel bars are sheared off in the actual construction process), and then hoisting the prefabricated secondary beam 2 to the corresponding installation position to form the pouring space 3.

The process of forming the casting space 3 is as follows:

two prefabricated secondary beams 2 are respectively arranged at two ends of the through groove 11 along the width direction of the prefabricated main beam 1 and are arranged oppositely, and the prefabricated secondary beams 2 and the prefabricated main beam 1 are arranged in a crossed manner. A plurality of secondary beam stirrups 22 which are arranged at intervals along the length direction of the prefabricated secondary beam 2 are embedded in the prefabricated secondary beam 2, and the secondary beam stirrups 22 are vertically arranged and the upper parts of the secondary beam stirrups extend out of the prefabricated secondary beam 2. In addition, still pre-buried in the prefabricated secondary beam 2 has multiunit secondary beam structure reinforcing bar group, and multiunit secondary beam structure reinforcing bar group is from last to arranging down, and every group secondary beam structure reinforcing bar group comprises many secondary beam structure reinforcing bars 26 along 2 width direction interval arrangements of prefabricated secondary beam, and secondary beam structure reinforcing bar 26 arranges along the length direction of prefabricated secondary beam 2. The bottom layer of the secondary beam structural steel bar is a secondary beam bottom steel bar 24, and the bottom of the secondary beam stirrup 22 is hooped on the outer side of the secondary beam bottom steel bar 24; the secondary beam bottom rib 24 protrudes outside the prefabricated secondary beam 2 toward one end of the through groove 11 to form an anchor 25. The anchor 25 extends toward the through-slot 11 and then is bent upward to form a bent reinforcing bar.

As shown in fig. 2, two opposite end surfaces 21 of the two prefabricated sub-beams 2 close two lateral openings of the through groove 11, and the anchoring members 25 extend into the through groove 11, so that the two prefabricated sub-beams 2 and the prefabricated main beam 1 form a crossed structure. Two side walls of the through groove 11 and the end surfaces 21 of the two prefabricated secondary beams 2 enclose to form a pouring space 3.

S3: prop up and establish cast-in-place layer mould and carry out reinforcement, specifically, ligature main beam stirrup 12 and main beam gluten 13, ligature secondary beam stirrup 22 and secondary beam gluten 23 to ligature main beam gluten 13 and secondary beam gluten 23.

As shown in fig. 3 and 4, the cast-in-place layer formwork is erected on the top surface of the cross structure, the top surface of the cross structure serves as a lower template of the cast-in-place layer formwork, and the upper portions of the main beam stirrups 12 and the secondary beam stirrups 22 extend into the cast-in-place layer formwork. A reinforcing mesh is arranged in the cast-in-place layer die, the reinforcing mesh is formed by staggering main beam gluten 13 and secondary beam gluten 23, the main beam gluten 13 is arranged along the length direction of the prefabricated main beam 1, and the secondary beam gluten 23 is arranged along the length direction of the prefabricated secondary beam 2; the top of the main beam stirrup 12 is hooped outside the main beam gluten 13, and the top of the secondary beam stirrup 22 is hooped outside the secondary beam gluten 23.

S4: and pouring concrete in the pouring space 3 and the cast-in-place layer mold so as to integrally connect the prefabricated main beam 1 and the prefabricated secondary beam 2, and removing the cast-in-place layer mold to form a cast-in-place layer 4 at the upper end of the cross structure.

The above description is only for the preferred embodiment of the present application and should not be taken as limiting the present application in any way, and although the present application has been disclosed in the preferred embodiment, it is not intended to limit the present application, and those skilled in the art should understand that they can make various changes and modifications within the technical scope of the present application without departing from the scope of the present application, and therefore all the changes and modifications can be made within the technical scope of the present application.

Claims

1. The prefabricated main beam for the cross beam is characterized in that a through groove (11) matched with the end part of a prefabricated secondary beam is formed in the top surface of the prefabricated main beam (1), and the through groove (11) is formed in the width direction of the prefabricated main beam (1); and the prefabricated main beam (1) is provided with a connecting piece for connecting prefabricated main beam sections (16) at two sides of the through groove (11).

2. The precast main beam for a cross beam according to claim 1, characterized in that the connection comprises main beam construction bars (15) embedded in the precast main beam, the main beam construction bars (15) penetrating both side walls of the through groove (11).

3. The precast main beam for a cross beam according to claim 1, wherein the connector further comprises a connection plate (6), and the connection plate (6) is provided on at least one side surface of the precast main beam (1) in a width direction.

4. The precast main beam for the cross beam according to claim 3, wherein a sleeve group is pre-embedded on the side surface of the precast main beam (1) corresponding to the connecting plate (6), the sleeve group comprises two sleeves (5), the two sleeves (5) are respectively arranged on two sides of the through groove (11) along the length direction of the precast main beam (1), and the connecting plate (6) and the two sleeves (5) are connected through bolts (7).

5. The precast main beam for cross beam according to claim 4, wherein the sleeve sets are provided in plural sets, and the plural sets of sleeve sets are distributed from top to bottom in a vertical direction.

6. The precast main beam for cross beam according to claim 5, characterized in that the connecting plates (6) are provided in plurality, and a plurality of connecting plates (6) are in one-to-one correspondence with a plurality of sets of sleeves.

7. The precast main beam for the cross beam according to claim 2, wherein a plurality of main beam stirrups (12) arranged at intervals along the length direction of the precast main beam (1) are embedded in the precast main beam (1), and the upper parts of the main beam stirrups (12) extend out of the precast main beam (1).

8. The precast main beam for a cross beam according to claim 7, wherein the main beam construction steel bars (15) penetrate through both end surfaces of the precast main beam (1) in the length direction, and the main beam construction steel bars (15) are bound or welded and fixed with the main beam stirrups (12).

9. The precast main girder for the cross beam according to claim 7, wherein a main girder bottom rib (14) arranged along the length direction of the precast main girder (1) is embedded in the precast main girder (1), the main girder bottom rib (14) is located below the through groove (11), and the bottom of the main girder hoop rib (12) is hooped on the outer side of the main girder bottom rib (14).