CN210342417U

CN210342417U - Prestressed special-shaped groove plate

Info

Publication number: CN210342417U
Application number: CN201921134874.0U
Authority: CN
Inventors: 杨峰; 耿俊迪
Original assignee: Ningbo Excellent Building Technology Co Ltd
Current assignee: Ningbo Excellent Building Technology Co Ltd
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2020-04-17
Anticipated expiration: 2029-07-19

Abstract

The prestressed special-shaped groove plate is characterized by comprising a panel and a rib beam, wherein the panel and the rib beam are integrally cast into a whole, the bottom of the rib beam is provided with an expanded section flange, and two sides of the panel are provided with notches which are longitudinally arranged. The bottom of the rib beam is provided with the prestressed special-shaped groove plate with the enlarged section flange, so that the bending resistance of the member is greatly increased, the bearing capacity is improved under the condition that the height of the groove plate is certain, the height of the groove plate is reduced under the condition that the live load is the same, and meanwhile, the inverted arch cracking of the member is effectively controlled under the combined action of the special-shaped concrete plate body and the prestressed steel strand.

Description

Prestressed special-shaped groove plate

Technical Field

The utility model relates to a building prefabricated component especially relates to a reinforced concrete prefabricated plate that is arranged in building to adopt pretensioning prestressing force.

Background

The prestressed double-T plate has the characteristics of large span, good bearing capacity and the like, but has the problems of difficult plate seam treatment and cracking caused by reverse arching of the concrete trough plate under the action of negative bending moment in the releasing and tensioning process, and is difficult to popularize in engineering application. The prestressed double-T plate in the prior art can not be manufactured by a long-line method, so that the manufacturing efficiency of components is reduced, the universality of a mould is poor, the manufacturing cost is improved, the bottom of a rib beam is not provided with a special-shaped rib for expanding a section flange, the height of the rib cannot be reduced under the same bending moment, the concrete panel is cracked due to the action of a negative bending moment when the prestressed double-T plate is placed in tension, the structural performance of a prefabricated component is influenced, and meanwhile, the pouring integrity is influenced because the placing gaps are not arranged on the two sides of the panel. The pretensioned prestressing deformed channel plate with expanded bottom section of rib beam has no report.

Disclosure of Invention

The utility model aims to solve the technical problem that overcome above-mentioned prior art not enough, provide one kind and have rib bottom cross-section enlarge the edge of a wing, make convenient prestressing force dysmorphism frid.

According to the utility model provides a pair of prestressing force dysmorphism frid, include the special-shaped concrete plate body and bury underground in as the prestressing force steel strand wires of main muscle in the special-shaped concrete plate body, the special-shaped concrete plate body includes panel and rib roof beam, and the panel waters as an organic wholely with the rib roof beam, the rib roof beam bottom has the expansion cross section edge of a wing, the panel both sides are equipped with along vertically shelving the breach.

According to the utility model provides a pair of prestressing force dysmorphism frid still has following attached technical characterstic:

the rib beam with the bottom provided with the flange with the enlarged section is L-shaped.

The upper part of the panel is transversely embedded with a steel bar truss at a certain distance, the steel bar truss is partially embedded in the panel concrete, and the upper part of the panel is exposed out of the surface of the panel at a certain height.

The end part of the rib beam of the special-shaped concrete plate body is provided with a placing cantilever head, and a notch is arranged below the cantilever head.

And prestressed steel strand balance bars are arranged at the upper parts of the groove plates.

At least part of the prestressed steel strands serving as the main reinforcements are sleeved with a sleeve with a certain length at the end part.

And a certain inclination is arranged on the inner side of the rib beam and the outer side of the flange of the enlarged section.

The special-shaped concrete plate is embedded with a steel bar net piece, and the steel bar net piece is arranged along the longitudinal direction.

The end part of the special-shaped concrete slab is transversely provided with an upward turning rib, the upper part and the lower part in the upward turning rib are longitudinally embedded with reinforcing steel bars, and two ends of each reinforcing steel bar are bent and extend into the rib beam for a certain length.

According to the utility model provides a pair of prestressing force dysmorphism frid compares with prior art and has following advantage:

1. the area of the pressure-bearing area during tension releasing is enlarged by the enlarged section area at the lower part of the channel plate rib, so that steel strands can be arranged as much as possible, the bending rigidity is increased, and the height of the rib is reduced under the same bending moment. Under the condition of the same rib height, the bearing capacity of the rib is improved, and the method is suitable for buildings with large live load.

2. The traditional double-T plate or the traditional lower convex transverse rib of the trough plate is cancelled, the traditional double-T plate or the traditional trough plate is changed into the traditional upper convex transverse rib, the trough plate can be manufactured by adopting a long-line method, the length of the plate can be randomly set, the work efficiency and the universality of the die are improved, and the cost of amortization of the die is greatly reduced.

3. The groove plates can be separated from the cast-in-place steel bar truss composite floor slab to form a multi-ribbed floor slab, so that the number of ribs and the number of prefabricated parts are reduced, the construction progress of the floor slab is greatly accelerated, and the manufacturing cost is reduced.

4. The groove plate and the cast-in-place surface layer are connected and combined into a laminated slab through a steel bar truss, and the integrity is good.

5. The upper part of the groove plate is provided with the prestress balance rib, so that the reverse arch of the groove plate can be effectively controlled, and the height difference of adjacent plates is reduced.

6. The transverse upward-turning ribs and the steel bar trusses are arranged on the trough plate, so that the bending resistance of the trough plate in the construction stage is effectively improved, and the cracking of the panel is avoided.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a partial perspective view of the tip of the present invention.

Fig. 3 is a sectional view taken along line a-a of fig. 2 according to the present invention.

Fig. 4 is a cross-sectional view of fig. 2B-B according to the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Referring to fig. 1 to 4, in the embodiment of a dysmorphism frid, including special-shaped concrete plate body 1 with bury underground in the special-shaped concrete plate body is prestressing force steel strand wires 2 as the main bar, special-shaped concrete plate body 1 includes rib 11 and panel 12, and rib 11 waters as an organic whole with panel 12, rib 11 bottom has enlarged cross section edge of a wing 111, panel 12 both sides are equipped with along vertically shelving breach 121. The bottom of the rib beam is provided with the flange with the enlarged section, so that steel strands can be arranged as much as possible, and the bending rigidity is enhanced, so that the height of the rib is reduced and the steel bar is saved under the same bending moment.

Referring to fig. 4, in the embodiment of the special-shaped trough plate of the present invention, the rib 11 with the bottom flange 111 having an enlarged cross section is L-shaped, the steel bar truss 3 is buried in the upper portion of the panel 12 at a certain distance from the upper portion, the steel bar truss 3 is partially buried in the concrete of the panel, and the upper portion is exposed from the surface of the panel 12 at a certain height. And the upper part of the groove plate is provided with prestressed strand balance bars 21. The prestressed balance ribs reduce the inverted arch phenomenon of the prestressed special-shaped trough plate, the rib beams are L-shaped, support points are provided for locally erecting a formwork support frame in the construction stage, formwork support is facilitated, the bending resistance of the plate is improved by arranging the steel bar trusses, and the integrity is improved by combining with post-cast concrete.

Referring to fig. 1 and 2, in the embodiment of the special-shaped trough plate provided by the present invention, the end of the rib beam 11 of the special-shaped concrete plate 1 is provided with a placing head 13, a notch 14 is arranged below the placing head, and the end of the prestressed steel strand 2 serving as the main reinforcement is sleeved with a sleeve 22 with a certain length at least partially. The notch is arranged below the cantilever head, so that the height of the placing beam or the placing notch of the precast beam is effectively reduced, and the sleeve with a certain length is sleeved at the end part, so that the stress concentration and cracking phenomenon of the end part is avoided.

Referring to fig. 3 and 4, in the embodiment of a special-shaped trough plate provided by the present invention, the inner side of the rib beam 11 and the outer side of the enlarged cross-section flange 111 are provided with a certain inclination, the reinforcing mesh 4 is embedded in the special-shaped concrete plate 1, the reinforcing mesh 4 is arranged along the longitudinal length, the end of the special-shaped concrete plate 1 is transversely provided with the upward-turning rib 15, the reinforcing bars 151 are vertically embedded in the upper and lower parts of the upward-turning rib 15, and both ends of the reinforcing bars 151 are bent to extend into the rib beam 11 by a certain length. The upper turning rib is arranged, so that the panel cracking caused by insufficient bending rigidity of the prestressed trough plate in the construction process is effectively prevented, the shearing strength of the member is improved by the reinforcing mesh, a certain inclination is arranged on the inner side of the rib beam and the outer side of the flange of the enlarged section, and the demolding efficiency is greatly improved.

Claims

1. The utility model provides a prestressing force dysmorphism frid, includes special-shaped concrete plate body and buries underground in the prestressing force stranded wire as the main reinforcement in the special-shaped concrete plate body, characterized by: the special-shaped concrete slab comprises a panel and a rib beam, the panel and the rib beam are integrally cast, the bottom of the rib beam is provided with a flange with an enlarged section, and two sides of the panel are provided with notches which are arranged along the longitudinal direction.

2. The prestressed profiled sheeting defined in claim 1 wherein said rib having an enlarged cross-sectional flange at the bottom thereof is L-shaped.

3. The prestressed profiled sheeting of claim 1 wherein said upper portion of said deck is embedded with steel trusses laterally spaced apart, the steel trusses being partially embedded in the deck concrete, the upper portion being exposed above the deck surface by a predetermined height.

4. The prestressed special-shaped trough plate as claimed in claim 1, wherein the rib beam end of the special-shaped concrete plate body is provided with a placing cantilever, and a notch is arranged below the cantilever.

5. The prestressed profiled groove plate as claimed in claim 1, wherein the upper portion of the groove plate is provided with prestressed strand balance bars.

6. The prestressed profiled channel sheet as claimed in claim 1, wherein the prestressed steel strands as the main reinforcement are at least partially sheathed at the ends with a jacket of a certain length.

7. The prestressed profiled sheeting defined in claim 1 wherein the inner sides of said ribs and the outer sides of said flanges of enlarged cross-section have a draft.

8. The prestressed profiled trough plate as claimed in claim 1, wherein a reinforcing mesh is embedded in the profiled concrete slab, and the reinforcing mesh is arranged along the longitudinal direction.

9. The prestressed profiled groove board as claimed in claim 1, wherein the end of the profiled concrete slab is transversely provided with an upper turning rib, the upper and lower parts of the upper turning rib are longitudinally embedded with reinforcing steel bars, and both ends of the reinforcing steel bars are bent to extend into the rib beam for a certain length.