Large-span laminated slab prefabricated layer, laminated slab and mounting structure of large-span laminated slab prefabricated layer

Abstract

The large-span laminated slab prefabricated layer comprises a prefabricated layer body, a plurality of distributed steel bars are arranged on the upper side and the lower side of the interior of the prefabricated layer body respectively, and the distributed steel bars in the prefabricated layer body are arranged in the width direction of the prefabricated layer body. A plurality of prestressed reinforcements are arranged on the lower side in the prefabricated layer body in the length direction of the prefabricated layer body; a plurality of section steel beams are arranged between the distribution steel bars on the upper side and the lower side in the length direction of the prefabricated layer body; a plurality of connecting steel bars are further installed on the upper side and the lower side of the distribution steel bars and extend out of the upper side face of the prefabricated layer body. The prestressed steel bars and the section steel beams are arranged in the prefabricated layer body, the bearing capacity can be improved, the floor slab deflection can be reduced, the floor slab steel bar consumption is small, the rigidity of the section steel beams is larger than that of truss steel bars adopted by an existing laminated slab prefabricated layer, and therefore large-span application can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of building engineering, in particular to a large-span composite board prefabricated layer, a composite board and an installation structure thereof. Background Art

[0002] The composite slab is a floor slab in a prefabricated building. The composite slab includes a prefabricated layer and a cast-in-place layer cast on the prefabricated layer. At present, the prefabricated layer of the composite slab mostly adopts a composite slab structure disclosed in CN214531417U. The composite slab includes a concrete layer and a steel bar assembly arranged in the concrete layer, and the steel bar assembly includes a composite slab bottom bar, a composite slab surface bar, a reinforcing long bar, a reinforcing short bar, a number of steel bar trusses and a fixed bar; the reinforcing long bar and the reinforcing short bar are both arranged between the composite slab bottom bar and the composite slab surface bar. Its characteristics are that it reduces the production difficulty and production cost, and under the premise of ensuring the use requirements of the composite slab, the prepared composite slab has the advantage of being thinner, which is convenient for its production and installation; its disadvantage is that since the composite slab body is thin, it is generally used in commercial housing with a span of about 3-5 meters and a small surface load, and it cannot be directly applied to industrial buildings with a large span of 6 meters or more or a large surface load. Utility Model Content

[0003] The technical problem to be solved by the utility model is: to solve the problems existing in the above-mentioned background technology and to provide a prefabricated layer of large-span composite panels so as to be applied to industrial buildings with large spans of 6 meters and above and large surface loads.

[0004] The second technical problem to be solved by the utility model is to provide a large-span composite board.

[0005] The third technical problem to be solved by the utility model is to provide an installation structure of a large-span composite board to facilitate the installation of the composite board.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a prefabricated layer of a large-span composite slab, including a prefabricated layer body, wherein a plurality of distribution steel bars are respectively arranged on the upper and lower sides of the prefabricated layer body, the distribution steel bars in the prefabricated layer body are arranged along the width direction of the prefabricated layer body, and a plurality of prestressed steel bars are arranged on the lower side of the prefabricated layer body along the length direction of the prefabricated layer body; a plurality of steel beams are arranged between the distribution steel bars on the upper and lower sides and along the length direction of the prefabricated layer body; a plurality of connecting steel bars are also installed on the distribution steel bars on the upper and lower sides, and the connecting steel bars extend out of the upper side surface of the prefabricated layer body.

[0007] The steel beam is a T-shaped steel.

[0008] A large-span composite slab adopts the large-span composite slab prefabricated layer, and a cast-in-place layer is further arranged on the prefabricated layer body of the large-span composite slab prefabricated layer.

[0009] A mounting structure for a large-span composite slab is used for the installation of the large-span composite slab. The mounting structure includes a wall connecting structure and supporting steel. The supporting steel is provided with mounting holes. The supporting steel is respectively mounted on the inner sides of the supporting beams at both ends of the length direction of the prefabricated layer body through the wall connecting structure. The two ends of the length direction of the prefabricated layer body are respectively placed on the supporting steel on both sides, and the cast-in-place layer is cast on the prefabricated layer body and the supporting beam.

[0010] The wall connection structure is a through-wall bolt and a nut. A through hole is provided on the support beam. The through-wall bolt passes through the through hole and the installation hole and then is screwed with the nut, so that the support steel is installed and fixed on the support beam.

[0011] A first pad is embedded in one side of the support beam against the support steel, and a first sleeve is fixed to one side of the first pad located inside the support beam. The through-wall bolt passes through the through hole, the first sleeve, the first pad and the installation hole and then the nut is screwed on.

[0012] The wall connecting structure includes a second sleeve and a connecting screw. The second sleeve is pre-buried in the support beam. The second sleeve includes an internal threaded tube. The connecting screw passes through the installation hole and is screwed to the internal threaded tube, thereby fixing the support steel on the support beam.

[0013] The two ends of the internally threaded tube are respectively fixed with second pads, and the connecting screw passes through the mounting hole, and then passes through the second pad on one side and is screwed to the internally threaded tube, so that the supporting steel is installed and fixed on the supporting beam.

[0014] The supporting steel is an angle steel.

[0015] Ribs are arranged at intervals on the supporting steel.

[0016] The utility model has the following beneficial effects:

[0017] 1. The prefabricated layer of the utility model is provided with prestressed steel bars and steel beams, which can improve the bearing capacity, reduce the deflection of the floor slab and reduce the amount of steel bars used in the floor slab. In addition, the rigidity of the steel beams is greater than the truss steel bars currently used in the prefabricated layer of the composite slab, so that the utility model can be applied to industrial buildings with a large span of 6 meters and above and a large surface load.

[0018] 2. The utility model installs supporting steel sections through the wall connection structure, and the prefabricated layer body is placed on the supporting steel sections on both sides. Since the prefabricated layer body has greater structural strength and bearing capacity, during construction, the lower part of the prefabricated layer body does not require additional support, which can save the construction period for installing the support, and the lower part of the prefabricated layer body has a larger working space for interleaved operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a structural schematic diagram of the large-span composite slab of the utility model.

[0021] Figure 2 It is a top view of the large-span composite panel of the utility model during installation.

[0022] Figure 3 for Figure 2 Schematic diagram of the AA section structure.

[0023] Figure 4 This is a schematic diagram of the main structure of the support steel of the utility model.

[0024] Figure 5 for Figure 3 At B in the middle, the wall connection structure is an enlarged structural diagram of through-wall bolts and nuts.

[0025] Figure 6 for Figure 3 At B in the middle, the wall connecting structure is an enlarged structural schematic diagram of the second sleeve and the connecting screw.

[0026] In the figure:

[0027] Prefabricated layer body 10, prestressed steel bars 11, distribution steel bars 12, connecting steel bars 13, and steel beams 14;

[0028] Cast-in-place layer 20;

[0029] Support beam 30, through hole 31;

[0030] Through-wall bolt 40, nut 41;

[0031] Support steel 50, mounting holes 51, ribs 52;

[0032] A first pad 60, a first sleeve 61;

[0033] A second sleeve 70, an internally threaded tube 71, and a second pad 72;

[0034] Connecting screw 80. DETAILED DESCRIPTION

[0035] Embodiment 1:

[0036] See also Figure 1 A prefabricated layer of a large-span composite slab comprises a prefabricated layer body 10, wherein a plurality of distribution steel bars 12 are respectively arranged on the upper and lower sides of the prefabricated layer body 10, wherein the distribution steel bars 12 in the prefabricated layer body 10 are arranged along the width direction of the prefabricated layer body 10, and a plurality of prestressed steel bars 11 are arranged on the lower side of the prefabricated layer body 10 along the length direction of the prefabricated layer body 10; a plurality of steel beams 14 are arranged between the distribution steel bars 12 on the upper and lower sides and along the length direction of the prefabricated layer body 10; a plurality of connecting steel bars 13 are also installed on the distribution steel bars 12 on the upper and lower sides, and the connecting steel bars 13 extend out of the upper side surface of the prefabricated layer body 10. Prestressed steel bars 11 are arranged in the prefabricated layer body 10 to improve the bearing capacity and reduce the deflection of the floor slab. Compared with the traditional method, the amount of steel bars used in the floor slab can be reduced. A steel beam 14 is also arranged in the prefabricated layer body 10. The elastic modulus of the steel beam is about 10 times that of concrete, and the bulk density is only about 3 times that of concrete, which improves the bearing capacity of the prefabricated layer. The rigidity of the steel beam 14 is greater than the truss steel bars currently used in the prefabricated layer of the composite slab. The prestressed steel bars 11 and steel beam 14 arranged in the prefabricated layer body 10 can realize the application of a large span of 6 meters and above, and the steel beam 14 does not protrude from the upper prefabricated surface, which is conducive to the upper water and electricity pipe routing. In this embodiment, the steel beam 14 is a T-shaped steel, and the connecting steel bar 13 is in a "J" shape.

[0037] Embodiment 2:

[0038] See also Figure 1 , 3 A large-span composite slab adopts the large-span composite slab prefabricated layer, and a cast-in-place layer 20 is also arranged on the prefabricated layer body 10 of the large-span composite slab prefabricated layer.

[0039] Embodiment three:

[0040] See also Figure 2-6 , a mounting structure of a large-span composite slab, used for the installation of the large-span composite slab, the mounting structure includes a wall-connecting structure and a supporting steel 50, the supporting steel 50 is provided with mounting holes 51, the supporting steel 50 is respectively installed on the inner side of the supporting beam 30 at both ends of the length direction of the prefabricated layer body 10 through the wall-connecting structure, the two ends of the length direction of the prefabricated layer body 10 are respectively placed on the supporting steel 50 on both sides, and the cast-in-place layer 20 is cast on the prefabricated layer body 10 and the supporting beam 30. The supporting steel 50 is installed through the wall-connecting structure, and the prefabricated layer body 10 is placed on the supporting steel 50 on both sides. Since the prefabricated layer body 10 has a large structural strength and bearing capacity, during construction, the lower part of the prefabricated layer body 10 does not need additional support, which can save the construction period of the installation support, and the lower part of the prefabricated layer body 10 has a large working space for interlaced operations. Support beam 30 concrete structure.

[0041] In a preferred embodiment, see Figure 5 The wall connection structure is a through-wall bolt 40 and a nut 41. A through hole 31 is provided on the support beam 30. The through-wall bolt 40 passes through the through hole 31 and the mounting hole 51 and then is screwed with the nut 41, so that the support steel 50 is installed and fixed on the support beam 30. The structure is simple.

[0042] During installation, one person holds the support steel 50, and another person inserts the through-wall bolt 40 from the other side of the support beam 30 into the through hole 31 and the mounting hole 51 on the support steel 50, and then screws the nut 41 on the through-wall bolt 40, so as to install and fix the support steel 50 on the support beam 30. After the cast-in-place layer 20 is solidified, the through-wall bolt 40, the nut 41 and the support steel 50 can be reused.

[0043] For further information, see Figure 5 The first pad 60 is also embedded in the side where the support beam 30 abuts against the support steel 50. The first pad 60 is also fixedly connected to the first sleeve 61 on the side located inside the support beam 30. The through-wall bolt 40 passes through the through hole 31, the first sleeve 61, the first pad 60 and the mounting hole 51 and then is screwed with the nut 41. The first pad 60 is provided to improve the stability of the installation of the support steel 50. The first sleeve 61 is welded to the first pad 60, so that the first pad 60 can be installed and fixed when the support beam 3 is cast.

[0044] In another embodiment, see Figure 6 The wall connection structure includes a second sleeve 70 and a connecting screw 80. The second sleeve 70 is pre-buried in the support beam 30. The second sleeve 70 includes an internal threaded tube 71. The connecting screw 80 passes through the mounting hole 51 and is screwed with the internal threaded tube 71, thereby fixing the support steel 50 on the support beam 30. In this way, during installation, it is not necessary to perform installation operations on the other side of the support beam 30, and the installation is more convenient.

[0045] During installation, one person holds the support steel 50 , and the other person passes the connecting screw 80 through the installation hole 51 and screws it with the internal threaded tube 71 , thereby installing and fixing the support steel 50 on the support beam 30 .

[0046] Furthermore, the two ends of the internal threaded tube 71 are respectively fixed with second pads 72, and the connecting screw 80 passes through the mounting hole 51, and then passes through the second pad 72 on one side and is screwed to the internal threaded tube 71, so that the support steel 50 is installed and fixed on the support beam 30. The stability of the installation of the internal threaded tube 71 and the stability of the installation of the support steel 50 are improved.

[0047] Specifically, the supporting steel 50 is an angle steel.

[0048] Furthermore, ribs 52 are arranged at intervals on the support steel 50 to improve the structural strength of the support steel 50.

[0049] The working principle or action process of the utility model is as follows:

[0050] See also Figure 2 , 3 During installation, the supporting steel sections 50 are respectively installed on the inner sides of the supporting beams 30 at both ends of the length direction of the prefabricated layer body 10 through the wall connection structure. The two ends of the length direction of the prefabricated layer body 10 are respectively placed on the supporting steel sections 50 on both sides, and the cast-in-place layer 20 is cast on the prefabricated layer body 10 and the supporting beams 30.

Claims

1. A large-span composite slab prefabricated layer, comprising a prefabricated layer body (10), wherein a plurality of distribution steel bars (12) are respectively arranged on the upper side and the lower side of the prefabricated layer body (10), characterized in that: The distribution steel bars (12) in the prefabricated layer body (10) are arranged along the width direction of the prefabricated layer body (10), and a plurality of prestressed steel bars (11) are arranged on the lower side of the interior of the prefabricated layer body (10) along the length direction of the prefabricated layer body (10); a plurality of steel beams (14) are arranged between the distribution steel bars (12) on the upper and lower sides and along the length direction of the prefabricated layer body (10); and a plurality of connecting steel bars (13) are also installed on the distribution steel bars (12) on the upper and lower sides, and the connecting steel bars (13) extend out of the upper side surface of the prefabricated layer body (10).

2. A large-span composite slab prefabricated layer according to claim 1, characterized in that: The steel beam (14) is a T-shaped steel.

3. A large-span composite slab, characterized in that: A large-span composite slab prefabricated layer as claimed in claim 1 or 2 is used, and a cast-in-place layer (20) is also provided on the prefabricated layer body (10) of the large-span composite slab prefabricated layer.

4. A mounting structure for a large-span composite plate, characterized in that: Used for installing a large-span composite slab as claimed in claim 3, the installation structure comprises a wall connection structure and a supporting steel (50), the supporting steel (50) is provided with an installation hole (51), the supporting steel (50) is respectively installed on the inner side of the supporting beams (30) at both ends of the length direction of the precast layer body (10) through the wall connection structure, the two ends of the length direction of the precast layer body (10) are respectively placed on the supporting steel (50) on both sides, and the cast-in-place layer (20) is cast on the precast layer body (10) and the supporting beam (30).

5. The installation structure of a large-span composite plate according to claim 4, characterized in that: The wall connection structure comprises a through-wall bolt (40) and a nut (41); a through hole (31) is provided on the support beam (30); the through-wall bolt (40) passes through the through hole (31) and the mounting hole (51) and then is screwed onto the nut (41), thereby mounting and fixing the support steel (50) on the support beam (30).

6. The installation structure of a large-span composite plate according to claim 5, characterized in that: A first pad (60) is also pre-buried on one side of the support beam (30) against the support steel (50); a first sleeve (61) is also fixedly connected to one side of the first pad (60) located inside the support beam (30); and the through-wall bolt (40) passes through the through hole (31), the first sleeve (61), the first pad (60) and the mounting hole (51) and is then screwed onto the nut (41).

7. The installation structure of a large-span composite plate according to claim 4, characterized in that: The wall connection structure comprises a second sleeve (70) and a connecting screw (80); the second sleeve (70) is pre-buried in the support beam (30); the second sleeve (70) comprises an internally threaded tube (71); the connecting screw (80) passes through the mounting hole (51) and is screwed to the internally threaded tube (71), thereby mounting and fixing the support steel (50) on the support beam (30).

8. The installation structure of a large-span composite plate according to claim 7, characterized in that: The two ends of the internally threaded tube (71) are respectively fixedly connected to second pads (72), and the connecting screw (80) passes through the mounting hole (51), passes through the second pad (72) on one side, and is screwed to the internally threaded tube (71), thereby installing and fixing the supporting steel (50) on the supporting beam (30).

9. A mounting structure for a large-span composite plate according to any one of claims 4 to 8, characterized in that: The supporting steel (50) is an angle steel.

10. The installation structure of a large-span composite plate according to claim 9, characterized in that: Ribs (52) are arranged at intervals on the supporting steel (50).

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