CN218668153U

CN218668153U - Steel ingot milling steel fiber self-supporting truss laminated slab

Info

Publication number: CN218668153U
Application number: CN202223054003.2U
Authority: CN
Inventors: 陈丰华; 顾金水
Original assignee: Zhejiang Muka New Material Co ltd
Current assignee: Zhejiang Muka New Material Co ltd
Priority date: 2022-11-17
Filing date: 2022-11-17
Publication date: 2023-03-21
Anticipated expiration: 2032-11-17

Abstract

The utility model relates to a building field. The steel ingot milling type steel fiber self-supporting truss composite slab comprises a precast concrete layer, a cast-in-place concrete layer and truss steel bars, wherein the bottom steel bars of the truss steel bars are embedded in the precast concrete layer, and the top steel bars of the truss steel bars are embedded in the cast-in-place concrete layer; at least one of the precast concrete layer and the cast-in-place concrete layer is embedded with steel ingot milling steel fiber; and two anchoring ends are respectively arranged at two ends of the steel ingot milling section steel fiber. The utility model discloses an it mills profiled steel fibre to add the steel ingot in the superimposed sheet, can effectively improve anti splitting, tensile, the shearing resistance of concrete, thereby allow the utility model discloses a bottom reinforcing bar of truss reinforcing bar does not stretch out from the precast concrete in situ, and then avoids when the installation, the problem of the reinforcing bar and the collision of roof beam reinforcing bar that stretch out.

Description

Steel ingot milling steel fiber self-supporting truss laminated slab

Technical Field

The utility model relates to a building field, concretely relates to superimposed sheet.

Background

With the continuous development of the building industry, the assembly type buildings are more and more widely applied in China, and the prefabricated composite slabs are the most widely applied prefabricated components in the assembly type buildings.

The bottom reinforcing steel bars of the truss reinforcing steel bars of the existing prefabricated composite slab can extend out of the prefabricated concrete layer, so that the structural strength of the joint is improved, and the cracking of the prefabricated concrete layer or the cast-in-place concrete layer is reduced. But the projected reinforcing bars are easily collided with the beam reinforcing bars when being installed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a steel ingot mills shaped steel fibre self-supporting truss superimposed sheet to solve above-mentioned technical problem.

The utility model provides a technical problem can adopt following technical scheme to realize:

the steel ingot milling type steel fiber self-supporting truss composite slab is characterized by comprising a precast concrete layer positioned below and a cast-in-place concrete layer positioned above;

the steel bar truss structure is characterized by further comprising truss steel bars, wherein bottom steel bars of the truss steel bars are embedded in the precast concrete layer, and top steel bars of the truss steel bars are embedded in the cast-in-place concrete layer;

at least one of the precast concrete layer and the cast-in-place concrete layer is embedded with steel ingot milling steel fiber;

and two anchoring ends are respectively arranged at two ends of the steel ingot milling section steel fiber.

The utility model discloses an it mills shaped steel fibre to add the steel ingot in the superimposed sheet, can effectively improve anti crack, tensile, the shearing resistance of concrete, thereby allow the utility model discloses a bottom reinforcing bar of truss reinforcing bar does not stretch out from precast concrete in situ, and then avoids when the installation, the reinforcing bar that stretches out and the problem of roof beam reinforcing bar collision.

Preferably, steel ingot milling steel fiber is embedded in the precast concrete layer; the thickness of the precast concrete layer is less than one fourth of the total thickness of the precast concrete layer and the cast-in-place concrete layer. The utility model discloses mill shaped steel fibre with the steel ingot and bury underground in precast concrete layer, make precast concrete layer's anti crack, tensile, shear resistance obtain improving to the thickness that allows precast concrete layer reduces, cast-in-place concrete layer increases, and then makes to bury the pipeline underground in cast-in-place concrete layer very convenient.

Drawings

Fig. 1 is a schematic view of a part of the structure of the present invention.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention will be further explained with reference to the specific drawings.

Referring to fig. 1, the steel ingot milling type steel fiber self-supporting truss composite slab comprises a precast concrete layer 1, a cast-in-place concrete layer 2, truss reinforcing steel bars 3, steel ingot milling type steel fibers and the like. The precast concrete layer 1 and the truss reinforcing steel bars 3 are precast and formed into a precast composite slab in a precast plant, then the precast composite slab is transported to a construction site, concrete is cast in situ above the precast concrete layer 1 to form a cast-in-situ concrete layer 2, and the part of the truss reinforcing steel bars 3 which leaks out of the precast concrete layer 1 is buried in the cast-in-situ concrete layer 2 when the concrete is cast in situ.

Truss reinforcing bar 3 is including the bottom reinforcing bar that is located the bottom, the top reinforcing bar that is located the top, the lateral wall reinforcing bar of the top reinforcing bar of connecting the bottom reinforcing bar, and the lateral wall reinforcing bar is preferred to be the corrugate, and the crest connection of lateral wall reinforcing bar is on the top reinforcing bar, and the trough connection of lateral wall reinforcing bar is on the reinforcing bar of bottom. The preferred lateral wall reinforcing bar of connection on same root top reinforcing bar has two, is the contained angle between two lateral wall reinforcing bars, and the preferred 30 degrees to 70 degrees of contained angle. The number of bottom rebars is preferably equal to the number of side wall rebars. The end part of the bottom steel bar does not leak outside the precast concrete layer 1. Thereby when avoiding the installation, the bottom reinforcing bar that leaks bumps with the roof beam reinforcing bar outward.

The precast concrete layer 1 can be embedded with a first reinforcing mesh, and the first reinforcing mesh is formed by connecting first reinforcing steel bars 5 and second reinforcing steel bars 4 in a staggered manner. The first reinforcing steel bar is positioned below the bottom reinforcing steel bar and is vertical to the bottom reinforcing steel bar. The bottom rebar and the first rebar are joined together at a juncture. The connection here may be welding, lashing of steel reinforcement, etc. The second reinforcement bar 4 is positioned above the first reinforcement bar 5 and the second reinforcement bar 4 is parallel to the bottom reinforcement bar. Preferably, at least one second steel bar, preferably only one second steel bar, is arranged between two adjacent truss steel bars 3. The first and second reinforcing bars are preferably thread steel. Thereby increasing the contact area of the first mesh reinforcement and the concrete.

A second reinforcing mesh can be embedded in the cast-in-place concrete layer 2, and the second reinforcing mesh is formed by connecting third reinforcing steel bars 6 and fourth reinforcing steel bars 7 in a staggered mode. The third rebar 6 is located above the top rebar, and the third rebar 6 is perpendicular to the top rebar. The top and third bars 6 are joined together at a junction. The connection here may be welding, tying a bundle of reinforcing bars, etc. The fourth bar 7 is located above the third bar and the fourth bar 7 is parallel to the top bar. At least one fourth reinforcing bar, preferably two fourth reinforcing bars, is preferably arranged between two adjacent truss reinforcing bars 3. The third reinforcement bar is preferably not aligned with the first reinforcement bar and the fourth reinforcement bar is preferably not aligned with the third reinforcement bar. Thereby improving the bonding strength of the cast-in-place concrete layer 2 and the precast concrete layer 1 and improving the overall crack resistance, tensile strength and shear resistance. The third reinforcing steel bar and the fourth reinforcing steel bar are preferably deformed steel bars. Thereby increasing the contact area of the second mesh reinforcement with the concrete.

And at least one of the precast concrete layer 1 and the cast-in-place concrete layer 2 is embedded with steel ingot milling steel fiber. Two ends of the steel ingot milling section steel fiber are respectively provided with an anchoring end. Scheme 1, the steel ingot in precast concrete layer 1 mills the length of shaped steel fibre and is greater than the distance between second reinforcing bar and the bottom reinforcing bar. The length of the steel ingot milling steel fiber in the cast-in-place concrete layer 2 is larger than the larger one of the distance between the fourth steel bar and the top steel bar and the distance between two adjacent fourth steel bars. The utility model discloses a steel ingot mills profiled fiber's size for the steel ingot mills the existence that profiled fiber can be more stable in cast-in-place concrete layer 2 or precast concrete layer 1, thereby improves the steel ingot and mills anti-crack, tensile, the shearing resistance of profiled fiber place concrete layer. The ingot milled steel fiber is preferably radially twisted by more than 20 degrees. Thereby changing the contact surface with the concrete and improving the connection firmness with the concrete. Both side edges of the steel ingot milling steel fiber are provided with side wings, and the extending directions of the side wings are preferably different. The width of the anchoring end is preferably larger than the width of the steel ingot at other parts of the milled section steel fiber. Or the anchoring end is connected with the steel ingot milling steel fiber through a neck part with a smaller width. Or the end part of the steel ingot milled steel fiber protrudes outwards to form an anchoring end. Or the end part of the steel ingot milled steel fiber is turned inwards to form an anchoring end. Thereby increasing the area of the anchoring end. The anchoring end is preferably provided with a recess, and the recess is favorable for improving the contact effect of steel ingot milling section steel fibers and concrete and improving the connection fastness with the concrete. Scheme 2, the length of the steel ingot milling section steel fiber is 32mm, and the width is 2.6mm. The steel ingot milling type steel fiber is preferably in a strip shape, one surface of the steel ingot milling type steel fiber is a smooth surface, and the other surface of the steel ingot milling type steel fiber is a rough surface, so that the connection fastness of the steel ingot milling type steel fiber and concrete is improved. The steel ingot milling section steel fiber can be also provided with a through hole. Thereby utilizing the through holes to increase the connection firmness with the concrete.

Preferably, steel ingot milling steel fiber is embedded in the precast concrete layer 1; the thickness of the precast concrete layer 1 is less than one fourth of the total thickness of the precast concrete layer 1 and the cast-in-place concrete layer 2. The utility model discloses mill steel ingot shaped steel fibre and bury underground in precast concrete layer 1, make precast concrete layer 1 anti crack, tensile, shear resistance obtain improving to allow precast concrete layer 1's thickness to reduce, cast-in-place concrete layer 2's thickness increase, and then make to bury the pipeline underground in cast-in-place concrete layer 2 very convenient.

Preferably, the second reinforcing steel bar or the fourth reinforcing steel bar is sleeved with an annular magnet ring. The steel ingot milled steel fiber is preferably made of alloy steel. The magnet ring has a magnetic attraction effect on the steel ingot milling section steel fibers, and the arrangement condition of the steel ingot milling section steel fibers in the precast concrete layer 1 can be effectively improved. The magnet rings are preferably arranged at equal intervals. The magnet ring is preferably a notched magnet ring. Thereby utilize the breach joint on second reinforcing bar or fourth reinforcing bar. Further preferably, the second reinforcing bar or the fourth reinforcing bar is provided with concave parts at equal intervals. The width of the concave part is smaller than the width of the gap of the magnet ring. Therefore, when the magnet ring fixing device is used, the magnet ring is clamped on the second steel bar or the fourth steel bar by the concave part, and then the magnet ring is hemmed to the part which is not concave inwards along the steel bar, so that the magnet ring is fixed.

The utility model discloses because of adding the steel ingot and milling shaped steel fibre, so do not have the wire net in precast concrete layer 1. The utility model discloses because of anti, tensile, the shearing resistance is good, so the tip of bottom reinforcing bar, first reinforcing bar, second reinforcing bar all does not stretch out from precast concrete layer 1. The end parts of the top steel bar, the third steel bar and the fourth steel bar do not extend out of the cast-in-place concrete layer 2.

The concrete used to form the precast concrete layer 1, the cast-in-place concrete layer 2 is preferably steel fiber concrete. The steel fiber concrete is preferably concrete to which steel ingot milled steel fibers are added. The method for adding steel ingot milling steel fiber into concrete comprises the following steps: the method comprises the following steps: steel ingot milling steel fibers are added during dry mixing, for example: pouring the mixture to an aggregate conveying belt, conveying the aggregate conveying belt and the stones into a stirrer together, and also directly pouring the aggregate conveying belt and the stones into the stirrer. The method 2 comprises the following steps: the steel ingot milling section steel fiber is added during wet mixing and directly poured into a stirrer. The mixing amount of steel ingot milling type steel fibers is preferably 30kg/m ³ 。

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The steel ingot milling type steel fiber self-supporting truss composite slab is characterized by comprising a precast concrete layer positioned below and a cast-in-place concrete layer positioned above;

2. The ingot milling steel fiber self-supporting truss composite slab of claim 1, wherein the thickness of the precast concrete layer is less than a quarter of the total thickness of the precast concrete layer and the cast-in-place concrete layer.

3. The ingot milling type steel fiber self-supporting truss composite slab according to claim 1, wherein the truss reinforcing steel bars further comprise side wall reinforcing steel bars connected with top reinforcing steel bars of bottom reinforcing steel bars, the side wall reinforcing steel bars are corrugated, wave crests of the side wall reinforcing steel bars are connected with the top reinforcing steel bars, and wave troughs of the side wall reinforcing steel bars are connected with the bottom reinforcing steel bars;

the lateral wall reinforcing bar of connection on same root top reinforcing bar has two, is the contained angle between two lateral wall reinforcing bars, the contained angle is 30 degrees to 70 degrees.

4. The ingot milling steel fiber self-supporting truss composite slab as claimed in claim 1, wherein a first reinforcing mesh is further embedded in the precast concrete layer, the first reinforcing mesh is formed by connecting first reinforcing bars and second reinforcing bars in a staggered manner, the first reinforcing bars are located below the bottom reinforcing bars, the first reinforcing bars are perpendicular to the bottom reinforcing bars, and the bottom reinforcing bars and the first reinforcing bars are connected together at junctions; the second reinforcing bar is located the top of first reinforcing bar, and the second reinforcing bar is on a parallel with the bottom reinforcing bar.

5. The ingot milling steel fiber self-supporting truss composite slab of claim 4, wherein the ends of the bottom rebar, the first rebar, and the second rebar do not protrude from the precast concrete layer.

6. The ingot milling steel fiber self-supporting truss composite slab as claimed in claim 1, wherein a second steel bar mesh is further embedded in the cast-in-place concrete layer, the second steel bar mesh is formed by connecting third steel bars and fourth steel bars in a staggered manner, the third steel bars are located above the top steel bars, the third steel bars are perpendicular to the top steel bars, and the top steel bars and the third steel bars are connected together at a junction; the fourth rebar is located above the third rebar, and the fourth rebar is parallel to the top rebar.

7. The ingot milling steel fiber self-supporting truss composite slab of claim 6, wherein the ends of the top steel bar, the third steel bar and the fourth steel bar do not protrude from the cast-in-place concrete layer.

8. The ingot milled section steel fiber self-supporting truss composite slab according to any one of claims 1 to 7, wherein the ingot milled section steel fiber is in a strip shape, one surface of the ingot milled section steel fiber is a smooth surface, and the other surface of the ingot milled section steel fiber is a rough surface.

9. The ingot milled steel fiber self-supporting truss composite slab of claim 8, wherein the ingot milled steel fiber radial twist is greater than 20 degrees.

10. The ingot milling steel fiber self-supporting truss composite slab according to claim 8, wherein side wings are arranged at both side edges of the ingot milling steel fiber.