阅读说明：本技术 一种带搁置挑头的预制密肋板 (Prefabricated dense rib plate with shelving cantilever head ) 是由 杨峰 耿俊迪 俞锋波 于 2021-08-22 设计创作，主要内容包括：一种带搁置挑头的预制密肋板,包括钢筋砼平板、纵肋、横肋和钢筋桁架,所述钢筋砼平板由钢筋网片和砼组成,所述纵肋由纵肋砼、弯起纵筋、抗剪件组成,所述弯起纵筋埋设于所述纵肋砼下部,所述抗剪件在弯折后的所述弯起纵筋端部焊接联结,所述纵肋间隔布置于所述钢筋砼平板下侧,所述横肋由横肋砼、横肋钢筋组成,所述钢筋桁架由上弦筋、腹筋组成,至少有一道所述钢筋桁架横向埋设于所述钢筋砼平板靠近端部位置,所述钢筋桁架垂直于所述纵肋,所述纵肋、所述横肋和所述钢筋砼平板浇筑为一体。带搁置挑头的预制密肋板吊装效率高、端部抗剪性能好,且横纵相交的纵肋和横隔肋结合可提高肋间变形协调性能,提高局部荷载作用下的超载能力。(A prefabricated ribbed slab with a shelving cantilever comprises a reinforced concrete slab, longitudinal ribs, transverse ribs and a reinforced concrete truss, wherein the reinforced concrete slab consists of a reinforced mesh and concrete, the longitudinal ribs consist of longitudinal rib concrete, bent longitudinal ribs and shearing resistant pieces, the bent longitudinal ribs are embedded at the lower parts of the longitudinal rib concrete, the ends of the bent longitudinal ribs of the shearing resistant pieces after bending are welded and connected, the longitudinal ribs are arranged at the lower sides of the reinforced concrete slab at intervals, the transverse ribs consist of transverse rib concrete and transverse rib steel bars, the reinforced concrete truss consists of upper chord ribs and web ribs, at least one reinforced concrete truss is transversely embedded at the position, close to the end, of the reinforced concrete slab, the reinforced concrete truss is perpendicular to the longitudinal ribs, and the longitudinal ribs, the transverse ribs and the reinforced concrete slab are cast into a whole. The prefabricated ribbed slab with the shelving cantilever head has high hoisting efficiency and good end shearing resistance, and the combination of the longitudinal ribs and the transverse ribs which are intersected transversely and longitudinally can improve the deformation coordination performance between the ribs and improve the overload capacity under the action of local load.)

1. A prefabricated rib plate with a placing overhanging head comprises a reinforced concrete flat plate, longitudinal ribs, transverse ribs and a steel bar truss, and is characterized in that

The reinforced concrete slab consists of a reinforced net piece and concrete, the reinforced net piece is embedded in the concrete,

the longitudinal ribs are composed of longitudinal rib concrete, bent longitudinal ribs and anti-shearing pieces, the bent longitudinal ribs are embedded at the lower parts of the longitudinal rib concrete, the bent longitudinal ribs are bent from bottom to top at the end parts of the longitudinal rib concrete, the anti-shearing pieces are welded and connected at the end parts of the bent longitudinal ribs after being bent, the anti-shearing pieces are embedded in the reinforced concrete slab and are upwards exposed to a certain height, the anti-shearing pieces extend outwards for a certain distance to form placing cantilever heads, the longitudinal ribs are arranged at the lower side of the reinforced concrete slab at intervals, and the end parts of the longitudinal ribs are inwards away from the end parts of the reinforced concrete slab for a certain length,

the transverse ribs are composed of transverse rib concrete and transverse rib steel bars, the transverse rib steel bars are embedded at the lower part of the transverse rib concrete, at least one transverse rib is transversely arranged at the lower part of the reinforced concrete slab, the transverse ribs are perpendicular to the longitudinal ribs,

the steel bar truss is composed of upper chord reinforcements and web reinforcements, at least one steel bar truss is transversely embedded at the position close to the end part of the steel bar concrete slab, the steel bar truss is upwards exposed out of the steel bar concrete slab for a certain height and is vertical to the longitudinal ribs,

the longitudinal ribs, the transverse ribs and the reinforced concrete slab are poured into a whole.

2. The prefabricated ribbed slab with a standing cantilever as claimed in claim 1, wherein the bent longitudinal rib extends upward from the upper surface of the reinforced concrete slab.

3. The prefabricated ribbed slab with a standing cantilever as claimed in claim 1, wherein the sections of the longitudinal rib concrete and the transverse rib concrete are small at the bottom and large at the top.

4. The prefabricated ribbed slab with a standing pick head as claimed in claim 1, wherein the steel bar truss further comprises a lower chord.

5. The prefabricated ribbed slab with a standing pick head as claimed in claim 1, wherein vertical shear bars are disposed at both ends of the longitudinal rib, the upper portion of the shear bars is exposed out of the reinforced concrete slab for a certain height, and the shear bars are bent by reinforcing bars and have an S-shape.

6. The prefabricated ribbed slab with a standing cantilever as claimed in claim 1, wherein the planes on both sides of the reinforced concrete slab are provided with downward slopes.

7. The prefabricated ribbed slab with a placing pick head as claimed in claim 1, wherein the end of the reinforced concrete slab is provided with a transversely arranged concrete upturned rib, and the concrete upturned rib is higher than the upper surface of the reinforced concrete slab by a certain height.

8. The prefabricated ribbed slab with a placing ram as claimed in claim 1, wherein hooks are embedded at two ends of the longitudinal rib concrete, and the upper portion of each hook is exposed out of the reinforced concrete slab for a certain height.

9. The prefabricated ribbed slab with a cantilever head rest as claimed in claim 1, wherein the shear-resistant member is a steel plate, an I-steel, a Z-steel or an L-steel.

10. The prefabricated ribbed slab with a standing pick as claimed in claim 1, wherein the ends of said longitudinal ribs are beveled.

Technical Field

The invention relates to a concrete prefabricated part, in particular to a prefabricated dense rib plate with a placing cantilever head.

Background

The floor among traditional building structure usually adopts the mode of formwork to carry out the floor and pours, and the formwork process is many, and the quality is difficult to control, if adopt fabricated construction, the board is striden and is generally not more than 3 meters, otherwise need establish the support, floor economic nature is poor. In order to carry out the rapid construction without formwork erection during floor slab construction, the inventor discloses a patent that prefabricated ribbed slabs are adopted as the floor slabs, the prefabricated ribbed slabs are suitable for building structure with large load and large span, but matched prefabricated superposed beams need to be specially reserved with groove gaps matched with the cross section size and the rib spacing direction of the prefabricated ribbed slabs, the groove beams are high in manufacturing precision requirement and complex in construction, and meanwhile, the prefabricated ribbed slabs cannot be used for being combined with steel beam construction. The prefabricated ribbed slab with the placing cantilever head has the advantages of small hoisting difficulty, wide application range, large floor bearing capacity and good beam superposed surface shearing resistance, and has not been reported.

Disclosure of Invention

The invention aims to solve the technical problem of overcoming the defects of the prior art and provides the prefabricated dense rib plate with the placing cantilever head, which has the advantages of small hoisting difficulty, wide application range, large floor bearing capacity and good integrity.

The prefabricated ribbed slab with the placing overhanging head comprises a reinforced concrete slab, longitudinal ribs, transverse ribs and a reinforced truss, wherein the reinforced concrete slab comprises a reinforced net piece and concrete, the reinforced net piece is embedded in the concrete, the longitudinal ribs comprise longitudinal rib concrete, bent longitudinal ribs and a shearing resistant piece, the bent longitudinal ribs are embedded at the lower part of the reinforced concrete slab, the bent longitudinal ribs are bent from bottom to top at the end parts of the longitudinal rib concrete, the shearing resistant piece is welded and connected at the end parts of the bent longitudinal ribs after bending, the shearing resistant piece is embedded in the reinforced concrete slab and is upwards exposed to a certain height, the shearing resistant piece outwards extends for a certain distance to form the placing overhanging head, the longitudinal ribs are arranged at the lower side of the reinforced concrete slab at intervals, the end parts of the longitudinal ribs are embedded inwards for a certain length from the end parts of the reinforced concrete slab, the transverse ribs comprise transverse ribs and transverse rib steel bars, and the transverse ribs are arranged at the lower part of the transverse rib concrete, at least one transverse rib is transversely arranged at the lower part of the reinforced concrete slab, the transverse rib is perpendicular to the longitudinal rib, the reinforced truss is composed of an upper chord rib and a web rib, at least one reinforced truss is transversely embedded at the position close to the end part of the reinforced concrete slab, the reinforced truss is upwards exposed out of the reinforced concrete slab for a certain height, the reinforced truss is perpendicular to the longitudinal rib, and the longitudinal rib, the transverse rib and the reinforced concrete slab are cast into a whole.

The prefabricated dense rib plate with the placing pick head provided by the invention also has the following accessory technical characteristics:

the bent longitudinal ribs extend upwards out of the upper surface of the reinforced concrete slab.

The sections of the longitudinal rib concrete and the transverse rib concrete are in a shape with a small bottom and a large top.

The steel bar truss further comprises a lower chord rib.

Vertical shear steel bars are arranged at two ends of the longitudinal ribs, the upper portions of the shear steel bars are exposed out of the reinforced concrete slab for a certain height, and the shear steel bars are formed by bending steel bars and are S-shaped.

The planes on the two sides of the reinforced concrete slab are provided with downward slopes

The end part of the reinforced concrete slab is provided with a transversely arranged concrete upturned rib which is higher than the upper surface of the reinforced concrete slab by a certain height.

Lifting hooks are embedded at two ends in the longitudinal rib concrete, and the upper parts of the lifting hooks are exposed out of the reinforced concrete slab by a certain height.

The shear resistant piece is a steel plate, I-shaped steel, Z-shaped steel or L-shaped steel.

The end parts of the longitudinal ribs are inclined end surfaces.

Compared with the prior art, the prefabricated dense rib plate with the placing pick head provided by the invention has the following advantages:

1. the prefabricated ribbed slab for placing the cantilever head has good shear resistance, is convenient to hoist, and greatly improves the efficiency;

2. the placing cantilever head with the shearing resistant piece can be combined with an I-shaped steel beam and a concrete beam, and has wide application range;

4. the concrete longitudinal ribs are connected in series through the transverse ribs, so that the deformation coordination performance among the ribs is improved, and the overload capacity under the action of local load is improved.

5. The prefabricated dense rib plate with the large span can reduce the number of prefabricated beams, the steel consumption of the plate is small, and the construction cost is saved.

6. The post-cast part of the prefabricated dense rib plate and the prefabricated beam are integrally cast into a whole, the structural integrity is good, the truss steel bars are used as erection steel bars of the hogging moment steel bars of the cast-in-place layer of the laminated slab, the shearing strength of the laminated surface of the slab is improved, the truss steel bars are also used as upturning ribs of the series longitudinal ribs, and the uniform longitudinal stress in the hoisting stage is ensured.

Drawings

FIG. 1 is a perspective view of a prefabricated ribbed slab of the present invention.

Fig. 2 is a bottom view of a prefabricated ribbed panel of the present invention.

FIG. 3 is a cross-sectional view of a pre-ribbed slab of the present invention.

FIG. 4 is a reinforcement diagram of prefabricated ribbed slabs of the present invention.

Fig. 5 is a three-dimensional view of the steel bar truss of the invention.

FIG. 6 is a detailed view of the shear web reinforcement of the present invention.

Fig. 7 is a perspective view of the prefabricated ribbed slab with upturned ribs of the present invention.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This 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 7, in an embodiment of the prefabricated ribbed slab with a resting cantilever according to the present invention, the prefabricated ribbed slab includes a reinforced concrete slab 1, longitudinal ribs 2, transverse ribs 3 and a reinforced truss 4, the reinforced concrete slab 1 is composed of a reinforced mesh 11 and a concrete 12, the reinforced mesh 11 is embedded in the concrete 12, the longitudinal ribs 2 are composed of a longitudinal rib concrete 21, a bent longitudinal rib 22 and a shear resistant member 23, the bent longitudinal rib 22 is embedded at a lower portion of the longitudinal rib concrete 21, the bent longitudinal rib 22 is bent from bottom to top at an end of the longitudinal rib concrete 21, the shear resistant member 23 is welded and connected at an end of the bent longitudinal rib 22, the shear resistant member 23 is embedded in the reinforced concrete slab 1 and exposed upward to a certain height, the shear resistant member 23 extends outward to form a resting cantilever 24, the longitudinal ribs 2 are arranged at intervals at a lower side of the reinforced concrete slab 1, an end of the longitudinal rib 2 is inward away from an end of the reinforced concrete slab 1 by a certain length, the transverse rib 3 is composed of transverse rib concrete 31 and transverse rib steel bars 32, the transverse rib steel bars 32 are embedded in the lower portion of the transverse rib concrete 31, at least one transverse rib 3 is transversely arranged on the lower portion of the reinforced concrete slab 1, the transverse rib 3 is perpendicular to the longitudinal ribs 2, the reinforced truss 4 is composed of upper chord bars 41 and web bars 42, at least one reinforced truss 4 is transversely embedded in the position, close to the end portion, of the reinforced concrete slab 1, the reinforced truss 4 is upwards exposed out of the reinforced concrete slab 1 for a certain height, the reinforced truss 4 is perpendicular to the longitudinal ribs 2, and the longitudinal ribs 2, the transverse ribs 3 and the reinforced concrete slab 1 are integrally cast. The placing and picking head 24 greatly improves the hoisting efficiency, the placing and picking head can be directly placed on the placing surface of the precast beam to complete installation, the precast beam does not need to reserve a placing gap, the construction difficulty is greatly reduced, the shearing resistant piece 23 is favorable for improving the shearing strength at the end, the steel bar truss 4 does not have a lower chord rib, the effect is directly transmitted by the steel bar net piece 11 embedded in the reinforced concrete flat plate 1, the steel consumption can be further reduced, the steel bar truss 4 not only serves as a standing steel bar of a cast-in-place layer negative bending moment steel bar of a laminated slab, but also improves the shearing strength of the laminating surface of the slab, and also serves as an upturning rib of a series longitudinal rib to ensure that the longitudinal stress is uniform in each hoisting stage, the longitudinal rib 2 is favorable for improving the rigidity and the strength of the slab and effectively improving the bearing capacity, the transverse rib 3 can prevent the sheet from cracking in the processes of stripping and hoisting in the construction stage and improve the intercostal deformation coordination performance in the use process, the overload capacity under the action of local load is improved.

Referring to fig. 1 to 2 and 4, in the embodiment of the prefabricated ribbed slab with the standing cantilever according to the present invention, the bent longitudinal ribs 22 extend upward from the upper surface of the reinforced concrete slab 1, and the sections of the longitudinal rib concrete 21 and the transverse rib concrete 31 are small at the bottom and large at the top. The bent longitudinal ribs 22 are communicated with the shear resistant pieces 23 to penetrate into the concrete cast-in-situ layer upwards, so that the integrity of the floor slab is improved, the shear resistance of the laminated surface is improved, and the longitudinal rib concrete and the transverse rib concrete with small lower parts and large upper parts are favorable for demolding.

Referring to fig. 5, in the embodiment of the prefabricated ribbed slab with the cantilever head, the steel bar truss 4 further comprises a lower chord 43. The lower chord rib can improve the tensile property of the lower side of the steel bar truss.

Referring to fig. 4 and 6, in the embodiment of the prefabricated ribbed slab with the cantilever head, vertical shear steel bars 25 are arranged at two ends of the longitudinal rib 2, the upper parts of the shear steel bars 25 are exposed out of the reinforced concrete slab for a certain height, and the shear steel bars 25 are formed by bending steel bars and are in an S shape. Vertical shear reinforcement is favorable to increasing the shear resistance of prefabricated dense floor tip, and the reinforcing bar processing of S form is convenient, but quick batch production, and efficient when reinforcement.

Referring to fig. 3, in the embodiment of the prefabricated dense rib plate with the placing cantilever according to the present invention, the planes on both sides of the reinforced concrete slab 1 are provided with downward slopes 13. Is beneficial to the placement of the mesh sheet ribs at the abutted seam.

Referring to fig. 7, in the embodiment of the prefabricated ribbed slab with the placing pick according to the present invention, the end of the reinforced concrete slab 1 is provided with a transversely arranged concrete upturned rib 14, and the concrete upturned rib 14 is higher than the upper surface of the reinforced concrete slab 1 by a certain height. The upper turning rib 14 is equivalent to the truss reinforcing steel bar 4, so that the transverse stress performance is improved during stripping and hoisting, and the plate is prevented from cracking.

Referring to fig. 1, 4 and 7, in the embodiment of the prefabricated ribbed slab with the cantilever head, hooks 5 are embedded at two ends in the longitudinal rib concrete 21, the upper portion of each hook 5 is exposed out of the reinforced concrete slab 1 by a certain height, the shear resistant member 23 is a steel plate, an i-steel, a Z-steel or an L-steel, and the end portion of each longitudinal rib 2 is an inclined end surface 26. The lifting hook is used for demoulding, the shearing resistant piece 23 is preferably purchased finished section steel, and can be machined and customized if the shearing resistant strength and the installation requirement are not met.

In the present invention, all of the "certain height, certain distance, certain length" means the length necessary to meet the design requirements, that is, the length required to adapt to the connection and strength requirements, and the length is clear to those skilled in the art and can be set as required.