Thin steel strip reinforced prestressed concrete laminated slab

Abstract

The utility model relates to a thin steel strip reinforced prestressed concrete laminated slab which comprises a concrete laminated slab and a thin steel strip, and the concrete laminated slab comprises prestressed reinforcements, slab distribution reinforcements and a concrete pouring layer; the prestressed steel bars and the plate distribution steel bars are longitudinally, transversely and evenly arranged and distributed in the middle of the concrete pouring layer. The multiple thin steel strips are embedded in the upper layer of the concrete laminated slab, and the length direction of the thin steel strips is parallel to the length direction of the prestressed reinforcements; the thin steel strip is of a porous structure; the thin steel strip is provided with a plurality of piercing round holes, the residual plates on the peripheries of the piercing round holes are turned downwards, and the residual plates are embedded into the concrete pouring layer. According to the thin steel strip reinforced prestressed concrete laminated slab, the prestressed tendons are arranged in the center of the slab, so that the slab is stressed uniformly, and the slab surface is prevented from warping; and the thin steel strip is pre-buried on the plate surface, so that the integral structure of the plate is enhanced, and other structures can be extended.

Description

Technical Field

[0001] The utility model relates to the field of concrete composite slabs, in particular to a thin steel belt reinforced prestressed concrete composite slab. Background Art

[0002] Composite slab is a better structural form combining prefabrication and cast-in-place concrete. The prestressed thin plate is combined with the upper cast-in-place concrete layer to form a whole and work together. Prefabricated buildings have become the mainstream of today's construction industry. There are many types of prefabricated floor slabs on the market, mainly divided into dry-type connection floor slabs (such as SP slabs, double T slabs), composite slabs (such as steel truss composite slabs, steel pipe truss composite slabs) and metal floor slabs (such as steel truss floor slabs), etc.

[0003] The national standard 06GS439-1 "Prestressed concrete composite slab" is a solid composite slab with a thickness of 50, 60mm. The floor slab is relatively thick and not convenient for large-scale production. The national standard 14G443 "Prefabricated concrete composite slab with bottom slab" has a prestressed bottom slab with a thickness of 30mm. The prestressed thin slab and the rib beam are connected as a whole. There are many production equipment and measures, which cannot be mass-produced, hindering its development and application. In addition, due to the eccentricity of the prestressed tendons, the slab surface bends upward, and the early deformation is difficult to control, which affects its use. Conventional prestressed composite slabs are customized and produced according to their functions, and the position of the hook is fixed. They cannot be produced in advance, and the production cycle of the product needs to be determined according to the use time, so they cannot be mass-produced. Summary of the invention

[0004] In order to overcome at least one of the above problems, the utility model provides a thin steel strip reinforced prestressed concrete composite slab, in which the prestressed tendons are arranged at the center of the slab to make the slab evenly stressed and prevent the slab surface from warping; a thin steel strip is pre-embedded in the slab surface to strengthen the overall structure of the slab and to extend other structures.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a thin steel strip reinforced prestressed concrete composite slab, comprising a concrete composite slab and a thin steel strip, wherein the concrete composite slab comprises prestressed steel bars, slab distribution steel bars and a concrete casting layer; a plurality of the prestressed steel bars and slab distribution steel bars are respectively and evenly arranged vertically and horizontally in the middle of the concrete casting layer; a plurality of the thin steel strips are embedded in the upper layer of the concrete composite slab, and the length direction of the thin steel strips is parallel to the length direction of the prestressed steel bars.

[0006] Preferably, the slab distribution steel bars are flush with both sides of the concrete composite slab.

[0007] Preferably, the thin steel strip is of a porous structure; the thin steel strip is provided with a plurality of piercing circular holes, the residual plates around the piercing circular holes are turned down, and the residual plates are embedded in the concrete casting layer.

[0008] Preferably, the thickness of the thin steel strip is 0.3-0.8 mm, the diameter of the pierced circular hole is 20-40 mm, the downward-folded part of the remaining plate of the pierced circular hole is equally divided into six pieces, the divided materials are connected to the edge of the pierced circular hole, turned over and pressed under the thin steel strip, perpendicular to the thin steel strip plate surface, and anchored into the concrete.

[0009] Preferably, it also includes I-shaped embedded parts and steel meshes, wherein the I-shaped embedded parts are evenly arranged in rows in the concrete composite slab, and at least one row of I-shaped embedded parts is arranged in the concrete composite slab; the I-shaped embedded parts are fixed by steel meshes, and the steel meshes are pressed on both sides of the I-shaped embedded parts.

[0010] Preferably, a truss is provided on the thin steel strip.

[0011] Preferably, the truss is provided with ribs to form ribbed prestressed composite plates, and the ribs and the concrete composite plates are connected by 0.8-1.5 mm thick web steel plates, the connection positions are "J"-shaped embedded parts, and the connection methods are welding or bolt connection.

[0012] Preferably, the truss is provided with steel bars to form a prestressed composite plate of steel bar trusses, and the connection point between the steel bar trusses and the concrete composite plate is a thin steel strip, which can be welded or bolted.

[0013] Preferably, the truss is provided with steel tubes to form a steel tube truss prestressed composite plate, and the connection point between the steel tube truss and the concrete composite plate is a thin steel strip, which can be welded or bolted.

[0014] Preferably, the concrete composite slab has a length of 9000-12000 mm and a width of 600 / 1500 / 2000 / 2500 mm.

[0015] The beneficial effects of the utility model are as follows: the thin steel strip reinforced prestressed concrete composite slab strengthens the integrity of the composite slab. The thin steel strip is contacted by a magnetic lifting device, lifted and moved to a fixed position for stacking. The pre-buried thin steel strip can be used as an auxiliary connection point for the transportation and lifting of the plate. It can be lifted with a magnetic tool at any length, avoiding the lifting method of installing a hook at a fixed point of a commonly used customized product, so that the product can be cut arbitrarily like a steel plate. The prestressed tendons are set at the center of the plate to make the plate evenly stressed and prevent the plate surface from warping. The use of thin steel strips as connectors can provide a connection method for subsequent expansion products (such as ribbed prestressed concrete composite slabs, steel truss prestressed composite slabs, etc.), giving the concrete composite slab a larger space for expansion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1It is the overall structural schematic diagram of the thin steel strip reinforced prestressed concrete composite slab described in the present utility model;

[0018] Figure 2 It is the structural schematic diagram of the pierced round holes of the thin steel strip of the thin steel strip reinforced prestressed concrete composite slab described in the present utility model;

[0019] Figure 3 It is the structural schematic diagram of an implementation manner of the thin steel strip reinforced prestressed concrete composite slab described in the present utility model;

[0020] Figure 4 It is Figure 3 The schematic diagram of the channel-shaped embedded part.

[0021] Figure 5 It is the structural schematic diagram of a truss-included implementation manner of the thin steel strip reinforced prestressed concrete composite slab described in the present utility model;

[0022] Figure 6 It is the structural schematic diagram of a truss-included implementation manner of the thin steel strip reinforced prestressed concrete composite slab described in the present utility model;

[0023] Figure 7 It is the structural schematic diagram of a truss-included implementation manner of the thin steel strip reinforced prestressed concrete composite slab described in the present utility model;

[0024] Figure 8 It is the structural schematic diagram of Embodiment 2 of the thin steel strip reinforced prestressed concrete composite slab described in the present utility model.

[0025] Description of the drawings: 1. Concrete pouring layer, 2. Thin steel strip, 21. Pierced round hole, 22. Lower turning of the remaining plate, 3. Prestressed steel bar, 4. Plate distribution steel bar, 5. Embedded anchor, 6. Batten, 71. Rib plate, 72. Steel bar, 73. Steel pipe, 8. Channel-shaped embedded part, 9. Steel bar mesh. Detailed implementation manners

[0026] Now, the present utility model will be further described in detail with reference to the drawings. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0027] Embodiment 1

[0028] As Figure 1 shown, the thin steel strip reinforced prestressed concrete composite slab is composed of a concrete composite slab and multiple thin steel strips 2. The magnetic lifting equipment contacts the position of the thin steel strip 2, and is lifted and moved to a fixed position for stacking.

[0029] The concrete composite slab includes prestressed steel bars 3, plate distribution steel bars 4 and a concrete pouring layer 1;

[0030] The plurality of prestressed steel bars 3 and plate distribution steel bars 4 are evenly arranged vertically and horizontally in the middle of the concrete pouring layer 1; the plurality of prestressed steel bars 3 and plate distribution steel bars 4 form a grid-like prestressed steel bar structure. The prestressed steel bar structure is located in the middle layer of the concrete pouring layer 1, and the structure is more stable under stress.

[0031] One end of the prestressed steel bar 3 extends out of the concrete pouring layer 1, and the extended portion can be used to connect other components; multiple thin steel strips 2 are embedded in the upper layer of the concrete composite plate, and the length direction of the thin steel strips 2 is parallel to the length direction of the prestressed steel bar 3. The thin steel strips 2 are porous structures.

[0032] The embedded thin steel strip 2 can be used as an auxiliary connection point for the transportation and lifting of the plate. It can be lifted with a magnetic suction tool at any length, avoiding the lifting method of installing hooks at the fixed points of the commonly used customized products, so that the product can be cut arbitrarily like a steel plate. The thin steel strip 2 can be used as a connecting piece to provide a connection method for subsequent expansion products (such as ribbed prestressed concrete composite plates, steel truss prestressed composite plates, etc.), giving the concrete composite plate a larger expansion application space.

[0033] See also Figure 8 , the structure of the embedded anchor 5 is different. The upper part of the embedded anchor 5 in this embodiment is fixedly welded to the bottom surface of the thin steel strip, and the lower part of the embedded anchor 5 is a bent structure.

[0034] The bottom surface of the thin steel strip 2 is provided with a pre-embedded anchor 5, which is inserted into the concrete composite slab.

[0035] The plate distribution steel bars 4 are flush with both sides of the concrete composite plate, so the plate surface will not deform or bend upward.

[0036] In this embodiment, the thin steel strip 2 has a porous structure.

[0037] See also Figure 2 The thin steel strip 2 is provided with a plurality of piercing circular holes 21, and the remaining plates around the piercing circular holes 21 are turned down 22, and the remaining plates are embedded in the concrete pouring layer 1, which is convenient for connection with the concrete.

[0038] The thickness of the thin steel strip 2 is 0.3-0.8mm, and the diameter of the pierced circular hole 21 is 20-40mm. The remaining plate 22 of the pierced circular hole 21 is equally divided into six pieces. The block materials are connected to the edge of the pierced circular hole 21 and are turned and pressed under the thin steel strip 2, perpendicular to the thin steel strip plate surface, and anchored into the concrete.

[0039] In one embodiment, see Figure 4 , 5The concrete composite slab also has pre-embedded "J"-shaped embedded parts 8 and steel mesh 9. The "J"-shaped embedded parts 8 are evenly arranged in rows in the concrete composite slab and arranged at a fixed interval of 150-250mm. At least one row of "J"-shaped embedded parts 8 is arranged in the concrete pouring layer 1; the "J"-shaped pre-embedded parts 8 are fixed by the steel mesh 9, and the steel mesh 9 is two steel bars, which are pressed on both sides of the "J"-shaped pre-embedded parts 8 respectively.

[0040] In this embodiment, the length of the concrete composite board is 9000-12000 mm, and the width can be set to 600, 1500, 2000, 2500 mm according to needs.

[0041] In one embodiment, see Figure 5-7 , a truss 6 is arranged on the thin steel strip 2. The truss 6 is welded on the thin steel strip 2.

[0042] In one embodiment, see Figure 5 The truss 6 is provided with ribs 71 to form a ribbed prestressed composite plate. The ribs and the concrete composite plate are connected by a web steel plate with a thickness of 0.8-1.5 mm, and the connection position is a "J" shaped embedded part 8, and the connection method can be welding or bolt connection.

[0043] In one embodiment, see Figure 6 The truss 6 is provided with steel bars 72 to form a steel bar truss prestressed composite plate. The connection point between the steel bar truss and the concrete composite plate is a thin steel strip 2, which can be welded or bolted.

[0044] In one embodiment, see Figure 7 A steel tube 73 is arranged on the truss 6 to form a steel tube truss prestressed composite plate. The connection point between the steel tube truss and the concrete composite plate is a thin steel strip 2, which can be welded or bolted.

[0045] In this embodiment:

[0046] 1) Use standardized special steel formwork to produce prestressed composite slabs (including applying release agent, tensioning prestressed steel bars, installing distributed steel bars, pouring concrete, installing processed thin steel strips, maintenance, etc.);

[0047] 2) The concrete adopts C40 or above fine stone concrete + special fiber to enhance the toughness of the concrete;

[0048] 3) Thin steel strips are processed into finished products with embedded anchors;

[0049] 4) The thin steel strip is installed by pressing it with a special machine after the concrete is poured and before the initial setting;

[0050] 5) After the concrete curing is completed, use magnetic lifting equipment to contact the thin steel strip position, lift it and move it to a fixed position for stacking;

[0051] 6) Cut the prestressed thin plate according to the required length;

[0052] 7) Use thin steel plates as connectors to weld other accessories (such as steel trusses, steel pipe trusses, reinforcing ribs, etc.) to form other products.

[0053] Compared with conventional prestressed composite slabs that are customized and produced according to their functions, with fixed installation hook positions, they cannot be produced in advance, and the production cycle of the product needs to be determined according to the usage time, which makes it impossible to carry out large-scale production. The thin steel belt reinforced prestressed concrete composite slab of the utility model strengthens the integrity of the composite slab. The thin steel belt position is contacted by magnetic lifting equipment, and the steel belt is lifted and moved to a fixed position for stacking. The pre-buried thin steel belt can be used as an auxiliary connection point for plate transportation and lifting, and can be lifted with magnetic tools at any length, avoiding the lifting method of fixed point installation hooks of commonly used customized products, so that the product can be cut arbitrarily like steel plates.

[0054] Standardized medium and long molds are used for standardized production. The general thickness is 30-35mm, the length is standard 12m, and the width is 600-2500mm (specifications such as 600x12000, 900x12000, 1200x12000, 1500x12000, 2000x12000, etc.). It can be cut to any length according to needs when used. It can be used at any time like cement fiberboard, so that the production time and the use time are separated. Therefore, the product can be mass-produced and stored to ensure convenient and fast delivery when needed. The prestressed tendons are set in the center of the board to make the board evenly stressed and prevent the board surface from warping.

[0055] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A thin steel strip reinforced prestressed concrete composite slab, characterized in that: It comprises a concrete composite slab and a thin steel strip, wherein the concrete composite slab comprises prestressed steel bars, plate distribution steel bars and a concrete casting layer; a plurality of the prestressed steel bars and plate distribution steel bars are respectively and evenly arranged vertically and horizontally in the middle of the concrete casting layer; a plurality of the thin steel strips are embedded in the upper layer of the concrete composite slab, and the length direction of the thin steel strips is parallel to the length direction of the prestressed steel bars; the thin steel strips are of a porous structure; the thin steel strips are provided with a plurality of piercing circular holes, and the remaining plates around the piercing circular holes are turned down, and the remaining plates are embedded in the concrete casting layer.

2. The thin steel strip reinforced prestressed concrete composite slab according to claim 1, characterized in that: The slab distribution steel bars are flush with both sides of the concrete composite slab.

3. The thin steel strip reinforced prestressed concrete composite slab according to claim 1, characterized in that: The thickness of the thin steel strip is 0.3-0.8mm, the diameter of the pierced circular hole is 20-40mm, the downward-turned part of the remaining plate of the pierced circular hole is equally divided into six pieces, the divided materials are connected to the edge of the pierced circular hole, turned and pressed under the thin steel strip, perpendicular to the thin steel strip plate surface, and anchored into the concrete.

4. The thin steel strip reinforced prestressed concrete composite slab according to claim 3, characterized in that: It also includes "J"-shaped embedded parts and steel meshes. The "J"-shaped embedded parts are evenly arranged in rows in the concrete composite plate. At least one row of "J"-shaped embedded parts is arranged in the concrete composite plate. The "J"-shaped embedded parts are fixed by the steel meshes, and the steel meshes are pressed on both sides of the "J"-shaped embedded parts.

5. The thin steel strip reinforced prestressed concrete composite slab according to claim 4, characterized in that: A truss is arranged on the thin steel belt.

6. The thin steel strip reinforced prestressed concrete composite slab according to claim 5, characterized in that: The truss is provided with ribs to form ribbed prestressed composite plates. The ribs and the concrete composite plates are connected by 0.8-1.5mm thick web steel plates. The connection position is an "X"-shaped embedded part, and the connection method is welding or bolt connection.

7. The thin steel strip reinforced prestressed concrete composite slab according to claim 5, characterized in that: The truss is provided with steel bars to form a steel bar truss prestressed composite plate. The connection point between the steel bar truss and the concrete composite plate is a thin steel strip, which can be welded or bolted.

8. The thin steel strip reinforced prestressed concrete composite slab according to claim 5, characterized in that: The truss is provided with steel pipes to form a steel pipe truss prestressed composite plate. The connection point between the steel pipe truss and the concrete composite plate is a thin steel strip, which can be welded or bolted.

9. A thin steel strip reinforced prestressed concrete composite slab according to any one of claims 1 to 8, characterized in that: The length of the concrete composite slab is 9000-12000 mm, and the width is 600 / 1500 / 2000 / 2500 mm.

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