CN214739261U - Support-free primary and secondary beam system and prefabricated superposed main beam notch mold - Google Patents
Support-free primary and secondary beam system and prefabricated superposed main beam notch mold Download PDFInfo
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- CN214739261U CN214739261U CN202022305218.1U CN202022305218U CN214739261U CN 214739261 U CN214739261 U CN 214739261U CN 202022305218 U CN202022305218 U CN 202022305218U CN 214739261 U CN214739261 U CN 214739261U
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Abstract
The utility model relates to a support-free primary and secondary girder system and a prefabricated superposed girder notch mould, wherein the support-free primary and secondary girder system comprises a prefabricated superposed girder and a prefabricated superposed secondary girder; the cross section of any position of the notch area of the superposed main beam is in an inverted T shape; the upper surface of the supporting block arranged on the notch is provided with a groove with a pressure-bearing steel plate; and the end part of the superposed secondary beam is provided with an embedded steel connecting piece corresponding to the groove. A superposed girder notch mold comprises a notch mold and a suspension loop; the notch mold is n-shaped; the inner part can be provided with stiffening ribs or a chamber-divided cavity. The utility model has the advantages that: the structural design is carried out at the joint of the superposed main beam and the superposed secondary beam, so that the force transmission reliability of the joint at the construction stage can be improved, the joint has enough adjusting capacity, and the support-free and mould-free construction is realized.
Description
Technical Field
The utility model relates to a building element technical field, especially an exempt from to support primary and secondary roof beam system and prefabricated coincide girder notch mould.
Background
In recent years, fabricated buildings have been rapidly developed in our country. The national institute is discharged as the guide opinion about the vigorous development of the assembly type building, so that the green building and the building material are further definitely and actively popularized in the future, and the assembly type building accounts for 30 percent of the newly built building in about 10 years.
When the prefabricated superposed beam is adopted in the existing fabricated concrete building, a support is usually required to be arranged in the construction stage. When the layer height is large or the jump-layer column is provided, the support system is complicated and expensive. Therefore, in order to accelerate the construction speed and reduce the project measure cost, the support-free design of the prefabricated composite beam and the node thereof is valuable.
Conventional prefabricated coincide primary and secondary roof beam connected node sets up the notch that link up in girder department to make the secondary beam reinforcing bar can connect at the node, such structure makes the prefabricated coincide girder design when checking calculation the anti shearing bearing capacity in cross-section not enough in the construction stage, can't realize exempting from of prefabricated coincide roof beam and support.
SUMMERY OF THE UTILITY MODEL
The utility model provides a support-free primary and secondary girder system and a prefabricated superposed girder notch mould;
The utility model discloses a following technical scheme realizes:
a support-free primary and secondary beam system comprises a prefabricated superposed primary beam 1 and a prefabricated superposed secondary beam 2;
a plurality of through notches 11 are formed in the prefabricated superposed main beam 1, and supporting blocks 12 are arranged in the notches 11;
reinforcing steel bars 4 extending into the prefabricated superposed main beam 1 are arranged in the supporting block 12, so that the supporting block 12 and the prefabricated superposed main beam 1 are integrated;
the upper surface of the supporting block 12 is provided with a groove 13, and the bottom of the groove 13 is provided with a pressure-bearing steel plate 14;
the end part of the prefabricated superposed secondary beam 2 is provided with an embedded steel connecting piece, the embedded steel connecting piece comprises an embedded part 21 and a connecting part 22, the embedded part 21 is embedded in the prefabricated superposed secondary beam 2, and the embedded steel connecting piece at the end part of the prefabricated superposed secondary beam 2 extends out of the connecting part 22, so that the prefabricated superposed secondary beam 2 is lapped on the pressure-bearing steel plate 14 of the prefabricated superposed main beam 1 through the connecting part 22.
A prefabricated superposed girder notch mold comprises a notch mold 5 and a suspension loop 6;
the notch mold 5 includes two side plates 51, an upper top plate 52, and a groove forming plate 53; the two side plates 51 are respectively connected to two sides of the bottom surface of the upper top plate 52, so that the notch mold 5 is n-shaped; the top surface of the groove forming plate 53 is connected to the bottom surface of the upper top plate 52, and both side surfaces of the groove forming plate 53 are connected to the inner side surfaces of the two side plates 51, respectively.
Compared with the prior art, the utility model has the advantages that:
1. the connecting part of the prefabricated superposed main beam and the prefabricated superposed secondary beam is structurally designed, and the supporting block and the groove are added, so that the force transmission of the connecting part in the construction stage is more reliable, the connecting part has enough regulating capacity, and the support-free and mould-free construction is realized;
2. the shear force transmission at the joint of the primary beam and the secondary beam can be ensured through the cooperative stress of the hidden bracket formed by the groove and the embedded steel connecting piece, and the embedded steel connecting piece is particularly suitable for buildings such as industrial plants and logistics warehouses with high load requirements;
3. compare in the bright bracket connection of evagination, the utility model discloses a mould die sinking cost is low, and is comparatively pleasing to the eye moreover, and the security of embedded scheme is good simultaneously, the problem that secondary beam side direction drops can not appear.
Drawings
Fig. 1 is a notch schematic view of the prefabricated superposed girder of the present invention;
FIG. 2 is a perspective view of a prefabricated laminated main beam;
FIG. 3 is a sectional view of the joint of the prefabricated superposed main beam and the prefabricated superposed secondary beam;
FIG. 4 is a schematic structural diagram of a prefabricated superposed secondary beam steel connecting piece;
FIG. 5 is a schematic view of a slot die configuration;
figure 6 is a cross-sectional view of the slot die in use.
Description of reference numerals: the prefabricated composite beam comprises 1 prefabricated composite main beam, 11 notches, 12 supporting blocks, 13 grooves, 14 pressure-bearing steel plates, 141 embedded steel bars, 2 prefabricated composite secondary beams, 21 embedded parts, 211 embedded steel plates, 212 studs, 22 connecting parts, 4 reinforcing steel bars, 5 notch molds, 51 side plates, 52 upper top plates, 53 groove forming plates, 6 hangers, 7 prefabricated composite beam outer side molds, 8 screw rods and 9 setting mortar.
Detailed Description
The invention is explained in detail below with reference to the accompanying drawings:
as shown in fig. 1-4: the utility model relates to a support-free primary and secondary beam system, which comprises a prefabricated superposed primary beam 1 and a prefabricated superposed secondary beam 2;
a plurality of through notches 11 are formed in the prefabricated superposed main beam 1, and supporting blocks 12 are arranged in the notches 11;
reinforcing steel bars 4 extending into the prefabricated superposed main beam 1 are arranged in the supporting block 12, so that the supporting block 12 and the prefabricated superposed main beam 1 are integrated;
the upper surface of the supporting block 12 is provided with a groove 13, and the bottom of the groove 13 is provided with a pressure-bearing steel plate 14;
the end part of the prefabricated superposed secondary beam 2 is provided with an embedded steel connecting piece, the embedded steel connecting piece comprises an embedded part 21 and a connecting part 22, the embedded part 21 is embedded in the prefabricated superposed secondary beam 2, and the embedded steel connecting piece at the end part of the prefabricated superposed secondary beam 2 extends out of the connecting part 22, so that the prefabricated superposed secondary beam 2 is lapped on the pressure-bearing steel plate 14 of the prefabricated superposed main beam 1 through the connecting part 22.
The prefabricated superposed main beam 1 and the prefabricated superposed secondary beam 2 are prefabricated components, and are transported to a construction site for installation after being produced and formed in a factory. The groove 13 is generally the same as the extending direction of the notch 11, and mainly depends on the direction of the embedded steel connecting piece, and if the embedded steel connecting piece and the prefabricated superposed secondary beam 2 form a certain angle, the direction of the groove 13 can be adjusted.
In the production stage, overlapping the joints of the main beams and the secondary beams to reduce the width of the web plate of the prefabricated overlapped main beam and form an inverted T-shaped prefabricated section; arranging enough bending-resistant and shearing-resistant steel bars in a relevant range (namely arranging longitudinal steel bars and stirrups of the prefabricated superposed main beam on the supporting block 12 and the prefabricated superposed main beam 1), and then enabling the prefabricated superposed secondary beam to be closely attached to the lower flange concrete of the prefabricated superposed main beam through setting grout 9; after the notch is filled with high-strength shrinkage-free cement mortar and the design strength is reached, the joint of the primary beam and the secondary beam is superposed to form a whole bearing load in the use stage.
The height of the supporting block 12 is smaller than that of the notch 11, a cast-in-place concrete area 23 is filled in a space enclosed by the end part of the prefabricated superposed secondary beam 2 and the prefabricated superposed main beam 1, and the cast-in-place concrete area is poured to be flush with the upper surface of the prefabricated superposed secondary beam 2 or the prefabricated superposed main beam 1.
Here, the supporting blocks 12 have a height smaller than that of the notches 11, and after the placing work of the precast laminated secondary girder 2 is completed, the ends thereof are provided with cast-in-place concrete regions 23 having a thickness substantially equal to the difference in height between the supporting blocks 12 and the notches 11.
The bottom surface of the pressure-bearing steel plate 14 is also connected with embedded steel bars 141 extending into the supporting block 12, so that the pressure-bearing steel plate 14 can be tightly fixed on the groove 13.
The embedded part 21 includes an embedded steel plate 211 and a plurality of studs 212 welded to the embedded steel plate 211. The stud 212 and the embedded steel plate 211 are connected by welding.
The side of the supporting block 12 can also be provided with a pre-embedded steel bar straight thread sleeve. In the actual construction process, the situation that part of the secondary beam is cast in place may occur, so that the embedded steel bar straight thread sleeve is reserved on the supporting block, and during actual construction, the steel bar (cage) of the secondary beam is butted with the embedded steel bar straight thread sleeve, and then the secondary beam is poured.
The construction method of the support-free primary and secondary beam system comprises the following steps:
s1, mounting the prefabricated superposed main beam 1 in place;
s2, setting grout 9 on the contact bottom surfaces of the prefabricated superposed main beams 1 and the prefabricated superposed secondary beams 2;
s3, hoisting the prefabricated superposed secondary beam 2 to enable the connecting part 22 of the embedded steel connecting piece to align to the groove 13, and then putting down the prefabricated superposed secondary beam 2;
and S4, filling shrinkage-free mortar in the connecting area of the prefabricated superposed secondary beam 2 and the prefabricated superposed main beam 1, and finally pouring surface concrete to integrate the prefabricated superposed secondary beam 2 and the prefabricated superposed main beam 1.
As shown in fig. 5 and 6; in order to complete the rapid forming of the notch position of the prefabricated superposed girder, the utility model also comprises a notch mould of the prefabricated superposed girder of the support-free main and secondary girder system, which comprises a notch mould 5 and a hanging lug 6;
the notch mold 5 includes two side plates 51, an upper top plate 52, and a groove forming plate 53; the two side plates 51 are respectively connected to two sides of the bottom surface of the upper top plate 52, so that the notch mold 5 is n-shaped; the top surface of the groove forming plate 53 is connected to the bottom surface of the upper top plate 52, and both side surfaces of the groove forming plate 53 are connected to the inner side surfaces of the two side plates 51, respectively.
The hanging lug 6 is positioned at the side plate 51, the upper top plate 52 or the connection part of the side plate 51 and the upper top plate 52.
The side plate 51 has a certain thickness, so that the cross section of any position of the notch 11 area of the prefabricated superposed girder 1 is ensured to be in an inverted T shape (namely, the side plate 51 is wider, the width of a girder web plate at the joint is reduced, and an inverted T-shaped prefabricated cross section is formed), which is different from a conventional steel rabbet mould; the side plates 51 and the upper top plate 52 may be assembled by using wood plates or metal plates. When the side plates 51 and the upper top plate 52 are thicker, stiffening ribs can be arranged or a chamber-divided cavity can be arranged.
The slot die 5 further includes a screw through hole whose starting end is located on the upper surface of the upper top plate 52 and whose end extends to the lower surface of the groove forming plate 53.
By placing the screw on the screw through hole, the screw is extended from the lower surface of the groove forming plate 53, and then the pressure-bearing steel plate 14 is screwed to the screw (i.e., a screw hole is formed in the pressure-bearing steel plate 14).
The prefabricated laminated main beam shown in fig. 6 is produced in the following way:
s1, erecting a prefabricated superposed beam outer side die 7, and then placing a reinforcing steel bar 4 of a prefabricated superposed main beam into the prefabricated superposed beam outer side die 7 and adjusting the prefabricated superposed main beam to be in place; here the same procedure as the traditional prefabricated laminated main beam.
S2, locking the pressure-bearing steel plate 14 on the lower surface of a forming plate 53 of the groove 13 of the notch mold 5 through a screw 8, and placing the notch mold 5 on the outer side mold 7 of the prefabricated superposed beam through a hoisting lug 6;
and S3, performing concrete pouring operation, namely taking down the screw after the strength of the concrete reaches the design requirement, then dismantling the notch mold, and finally dismantling the outer side mold 7 of the prefabricated superposed beam.
While the present invention has been shown and described with reference to particular embodiments and alternatives thereof, it will be understood that various changes and modifications can be made without departing from the spirit and scope of the invention. It is understood, therefore, that the invention is not to be limited, except as by the appended claims and their equivalents.
Claims (7)
1. Exempt from to support primary and secondary roof beam system, its characterized in that: comprises a prefabricated superposed main beam (1) and a prefabricated superposed secondary beam (2);
a plurality of through notches (11) are formed in the prefabricated superposed main beam (1), and supporting blocks (12) are arranged in the notches (11);
reinforcing steel bars (4) extending into the prefabricated superposed main beam (1) are arranged in the supporting block (12), so that the supporting block (12) and the prefabricated superposed main beam (1) are integrated;
a groove (13) is formed in the upper surface of the supporting block (12), and a pressure-bearing steel plate (14) is arranged at the bottom of the groove (13);
prefabricated coincide secondary beam (2) tip is equipped with pre-buried steel connecting piece, pre-buried steel connecting piece includes pre-buried portion (21) and connecting portion (22), and pre-buried portion (21) are buried in prefabricated coincide secondary beam (2), and the pre-buried steel connecting piece of prefabricated coincide secondary beam (2) tip extends connecting portion (22) for prefabricated coincide secondary beam (2) overlap joint on pressure-bearing steel sheet (14) of prefabricated coincide girder (1) through connecting portion (22).
2. The support-free primary and secondary beam system of claim 1, wherein:
the length of the supporting block (12) in the extending direction of the notch (11) is smaller than that of the notch (11), so that the cross section of any position of the notch (11) area of the prefabricated superposed main beam (1) is in an inverted T shape, and a lower flange of the inverted T-shaped cross section forms a hidden corbel;
the height of the supporting block (12) is smaller than that of the notch (11), a cast-in-place concrete area (23) is filled in a space enclosed by the end part of the prefabricated superposed secondary beam (2) and the prefabricated superposed main beam (1), and the cast-in-place concrete area is poured to be flush with the upper surface of the prefabricated superposed secondary beam (2) or the prefabricated superposed main beam (1).
3. The support-free primary and secondary beam system of claim 1, wherein: the bottom surface of the pressure-bearing steel plate (14) is also connected with embedded steel bars extending into the supporting block (12).
4. The support-free primary and secondary beam system of claim 1, wherein: the embedded part (21) comprises an embedded steel plate (211) and a plurality of studs (212) welded on the embedded steel plate (211).
5. The support-free primary and secondary beam system of claim 1, wherein: the side of the supporting block (12) can be provided with a pre-embedded steel bar straight thread sleeve as required.
6. A prefabricated superimposed main beam slot mold for manufacturing the support-free main and secondary beam system of any one of claims 1-5, wherein: the device comprises a notch die (5) and a suspension loop (6);
the notch mold (5) comprises two side plates (51), an upper top plate (52) and a groove forming plate (53); the two side plates (51) are respectively connected with two sides of the bottom surface of the upper top plate (52) to ensure that the notch mold (5) is n-shaped; the top surface of the groove forming plate (53) is connected with the bottom surface of the upper top plate (52), and two side surfaces of the groove forming plate (53) are respectively connected with the inner side surfaces of the two side plates (51);
the hanging lug (6) is positioned at the side plate (51), the upper top plate (52) or the connecting part of the side plate (51) and the upper top plate (52).
7. The prefabricated overlapping girder slot mold of claim 6, wherein: the notch die (5) further includes a screw through hole, the start end of which is located on the upper surface of the upper top plate (52), and the end of which extends to the lower surface of the groove forming plate (53).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022305218.1U CN214739261U (en) | 2020-10-16 | 2020-10-16 | Support-free primary and secondary beam system and prefabricated superposed main beam notch mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022305218.1U CN214739261U (en) | 2020-10-16 | 2020-10-16 | Support-free primary and secondary beam system and prefabricated superposed main beam notch mold |
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| Publication Number | Publication Date |
|---|---|
| CN214739261U true CN214739261U (en) | 2021-11-16 |
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| CN202022305218.1U Active CN214739261U (en) | 2020-10-16 | 2020-10-16 | Support-free primary and secondary beam system and prefabricated superposed main beam notch mold |
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| CN (1) | CN214739261U (en) |
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