Precast concrete floor and construction method thereof

Abstract

The present invention relates to the technical field of building structures, and in particular to a precast concrete floor and a construction method thereof. A precast concrete floor comprises: a plurality of precast concrete beams arranged in parallel and at intervals, stirrups arranged inside the precast concrete beams, an additional steel cage extending outward from the top of the precast concrete beams, the width of the additional steel cage being smaller than the width of the stirrups, so as to form a reserved space on the periphery of the precast concrete beams; a plurality of precast concrete slabs, the ends of the precast concrete slabs being supported in the reserved space of the precast concrete beams, a pair of precast concrete slabs clamping the additional steel cage in the middle; a post-cast concrete layer filling the gap of the additional steel cage between two adjacent precast concrete slabs. The width of the additional steel cage is smaller than the width of the stirrups, which increases the reserved width of the top surface of the precast concrete beam, thereby increasing the contact area between the precast concrete slab and the precast concrete beam, and ensuring the support length of the precast concrete slab on the precast concrete beam.

Description

Technical Field

[0001] The invention relates to the technical field of building structures, and in particular to a precast concrete floor slab and a construction method thereof. Background Art

[0002] At present, in the construction of traditional concrete composite slabs, the common method is to use the precast concrete beam stirrups to become the positioning steel bars of the precast concrete slabs, and to serve as the connection and shear reinforcement between the precast part and the post-cast part. However, since the precast concrete beam stirrups are close to the beam edge, the precast concrete slab is limited by the precast concrete beam stirrups and the supporting length is small, which makes the construction inconvenient and poses a safety hazard. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect of the short supporting length of the precast concrete beams on the precast floor in the prior art, thereby providing a precast concrete floor and a construction method thereof.

[0004] In order to solve the above technical problems, the present invention provides a precast concrete floor, comprising:

[0005] A plurality of precast concrete beams are arranged in parallel and at intervals, stirrups are arranged inside the precast concrete beams, additional steel bars are extended from the top of the precast concrete beams, and the width of the additional steel bar cage is smaller than the width of the stirrups to form a reserved space at the periphery of the precast concrete beams;

[0006] A plurality of precast concrete panels are provided, the ends of the precast concrete panels are supported in the reserved spaces of the precast concrete beams, and a pair of precast concrete panels clamp the additional reinforcement cage in between;

[0007] The post-cast concrete layer is filled in the gap between the additional reinforcement cages of two adjacent precast concrete slabs.

[0008] Preferably, strip-shaped slots are provided on opposite surfaces of two adjacent precast concrete slabs, additional steel bars are horizontally arranged in the strip-shaped slots, and the length of the additional steel bars is equal to the distance between the ends of the slots of the opposite strip-shaped slots.

[0009] Preferably, the additional reinforcement is arranged crosswise with the additional reinforcement cage extending outward from the concrete beam.

[0010] Preferably, the post-cast concrete layer covers the precast concrete slab, and the additional reinforcement cage extending outward from the concrete beam extends into the post-cast concrete layer.

[0011] The present invention also provides a construction method for a precast concrete floor, comprising the following steps:

[0012] Embed stirrups in the precast concrete beam, weld an additional steel cage on the top of the stirrups, extend the additional steel cage to the outside of the precast concrete beam, and set the width of the additional steel cage to be smaller than the width of the stirrups, and hoist the precast concrete beam to a predetermined position; support the end of the precast concrete slab on the reserved space on the periphery of the precast concrete beam and contact with the additional steel cage; fill the gap between the additional steel cages between two adjacent precast concrete slabs with concrete to form a first concrete post-casting layer.

[0013] Preferably, before filling the gaps of the additional reinforcement cage with concrete, the method further comprises:

[0014] Procedure for routing additional reinforcement horizontally in slotted holes in precast concrete panels.

[0015] Preferably, the method further comprises: roughening the top surface of the precast concrete slab to form a roughened structure.

[0016] Preferably, the method further comprises the step of pre-embedding a plurality of longitudinal reinforcements in the precast concrete beam.

[0017] Preferably, the method further comprises the step of laying a post-cast concrete layer on the precast concrete slab.

[0018] The technical solution of the present invention has the following advantages:

[0019] 1. The precast concrete floor provided by the present invention comprises a plurality of precast concrete beams arranged in parallel and at intervals, stirrups are embedded in the precast concrete beams, an additional steel cage is extended from the top of the precast concrete beam as a connection and shear reinforcement between the precast part and the post-cast part, and the width of the additional steel cage is smaller than the width of the stirrups, so as to form a reserved space on the periphery of the precast concrete beam; a plurality of precast concrete slabs are provided, the ends of the precast concrete slabs are supported in the reserved space of the precast concrete beams, and a pair of precast concrete slabs clamp the additional steel cage in the middle; and the post-cast concrete layer is filled in the gap of the additional steel cage between two adjacent precast concrete slabs. The width of the additional steel cage is smaller than the width of the stirrups, which increases the reserved width of the top surface of the precast concrete beam, thereby increasing the contact area between the precast concrete slab and the precast concrete beam, and ensuring the support length of the precast concrete slab on the precast concrete beam.

[0020] 2. The precast concrete floor provided by the present invention has strip-shaped slots on the opposite surfaces of two adjacent precast concrete panels, and additional steel bars are placed in the strip-shaped slots to enhance the lateral connection performance between the precast concrete panels and enhance the integrity between the precast concrete panels.

[0021] 3. In the precast concrete floor provided by the present invention, the additional steel bars and the second steel cage are cross-arranged, and the mutual tension between the additional steel bars and the second steel cage is utilized to enhance the bonding strength between the precast concrete beam and the first concrete post-cast layer.

[0022] 4. In the precast concrete floor provided by the present invention, the post-cast concrete layer covers the top of the precast concrete slab, and the additional steel cage extends into the post-cast concrete layer on the upper part of the precast concrete slab. The post-cast concrete layer and the additional steel cage ensure that the post-cast concrete forms a whole with the precast concrete beams and precast concrete slabs and works together. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the structure of the precast concrete floor provided in an embodiment of the present invention.

[0025] Figure 2 It is a cross-sectional view of a precast concrete floor provided in an embodiment of the present invention.

[0026] Explanation of the reference numerals: 1. Precast concrete beam; 2. Longitudinal reinforcement; 3. Stirrups; 4. Additional reinforcement cage; 5. Precast concrete slab; 6. Strip slots; 7. Additional reinforcement; 8. Roughened structure; 9. Post-cast concrete layer. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] Example 1

[0032] like Figure 1 -2 shows a specific implementation of the precast concrete floor provided in this embodiment, including: a precast concrete beam 1, a precast concrete slab 5 and a concrete post-cast layer 9.

[0033] The precast concrete beam 1 is two rectangular beams arranged in parallel and at intervals. Stirrups 3 are embedded in the precast concrete beam 1. Longitudinal bars 2 are also arranged in the precast concrete beam 1. An additional steel cage 4 extends outward from the top of the precast concrete beam 1 as a connection and shear reinforcement between the precast part and the post-cast part, and the width of the additional steel cage 4 is smaller than the width of the stirrups 3 to form a reserved space on the periphery of the precast concrete beam 1 to ensure the supporting length of the precast concrete slab 5 on the precast concrete beam 1.

[0034] Three precast concrete slabs 5 are overlapped in parallel and at intervals on the reserved space of the two precast concrete beams 1. The three precast concrete slabs 5 are vertically arranged with the two precast concrete beams 1. The ends of the three precast concrete slabs 5 are supported in the reserved space of the precast concrete beams 1. A pair of precast concrete slabs 5 clamps the additional steel cage 4 in the middle. The top plate of the precast concrete slab 5 is provided with a roughening structure 8. The opposite surfaces between the two adjacent precast concrete slabs 5 are provided with a plurality of strip slots 6 arranged at intervals. The strip slots 6 are opened from the top of the precast concrete slab 5 and do not completely penetrate the bottom of the precast concrete slab 5. Additional steel bars 7 are horizontally arranged in the strip slots 6. The two ends of the additional steel bars 7 extend to the two oppositely arranged strip slots 6 respectively. The additional steel bars 7 are cross-arranged with the additional steel cage 4.

[0035] The concrete post-casting layer 9 is filled in the gap of the additional steel cage 4 between two adjacent precast concrete panels 5 and the upper part of the precast concrete panel 5. The additional steel cage 4 extends into the concrete post-casting layer 9 on the upper part of the precast concrete panel 5. The concrete post-casting layer 9 and the additional steel cage 4 ensure that the post-casting concrete, the precast concrete beam 1 and the precast concrete panel 5 form a whole and work together.

[0036] An additional steel cage 4 extends outward from the top of the precast concrete beam 1 as a connection and shear reinforcement between the precast part and the post-cast part. The width of the additional steel cage 4 is smaller than the width of the precast concrete beam stirrups 3, which increases the reserved width of the top surface of the precast concrete beam 1, thereby increasing the contact area between the precast concrete slab 5 and the precast concrete beam 1, thereby ensuring the supporting strength of the precast concrete beam 1 for the precast concrete slab 5.

[0037] Example 2

[0038] This embodiment provides a specific implementation method of a construction method of a precast concrete floor, comprising the following steps:

[0039] The processing of the precast concrete slab 5 is completed in the factory, and the top surface of the precast concrete slab 5 is roughened to form a roughened structure 8 .

[0040] The processing of the precast concrete rectangular beam is completed in the factory. The longitudinal reinforcement 2 and the stirrups 3 are embedded in the precast concrete beam 1. The additional steel cage 4 is welded on the top of the stirrups 3. The additional steel cage 4 extends to the outside of the precast concrete beam 1. The width of the additional steel cage 4 is set to be smaller than the width of the stirrups 3. The precast concrete beam 1 is hoisted to a predetermined position.

[0041] The ends of the precast concrete slabs 5 are supported on the reserved space on the periphery of the precast concrete beams 1 and are in contact with the additional steel cages 4; the additional steel bars 7 are horizontally arranged in the strip-shaped slots 6 on the opposite sides of the precast concrete slabs 5; the stress-bearing steel bars in the post-casting layer are tied and installed, and concrete is filled in the gap between the additional steel cages 4 between two adjacent precast concrete slabs 5, and pouring is continued above the precast concrete slabs 5 to form a concrete post-casting layer 9.

[0042] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A precast concrete floor, characterized in that: include: A precast concrete beam (1) having a plurality of stirrups (3) arranged in parallel and at intervals, wherein the precast concrete beam (1) is provided with stirrups (3), an additional steel cage (4) extending outward from the top of the precast concrete beam (1), the additional steel cage (4) being welded to the top of the stirrups (3), the width of the additional steel cage (4) being smaller than the width of the stirrups (3), so as to form a reserved space on the periphery of the precast concrete beam (1); A plurality of precast concrete panels (5) are provided, wherein the ends of the precast concrete panels (5) are supported in the reserved spaces of the precast concrete beams (1), and a pair of the precast concrete panels (5) clamp the additional steel cage (4) in the middle; A concrete post-cast layer (9) is filled in the gap between the additional steel cage (4) between two adjacent precast concrete slabs (5) and in the upper part of the precast concrete slab; the additional steel cage extends into the concrete post-cast layer on the upper part of the precast concrete slab, and the concrete post-cast layer and the additional steel cage ensure that the post-cast concrete, the precast concrete beam, and the precast concrete slab form an integral whole and work together; A plurality of strip slots (6) are provided at intervals on the opposite surfaces between two adjacent precast concrete panels (5), the strip slots (6) being provided from the top of the precast concrete panels (5) and not completely passing through the bottom of the precast concrete panels (5), additional steel bars (7) being arranged horizontally in the strip slots (6), the two ends of the additional steel bars (7) respectively extending into the two oppositely arranged strip slots (6), the additional steel bars (7) being arranged crosswise with the additional steel bar cage (4), and the length of the additional steel bars (7) being equal to the distance between the notch ends of the opposite strip slots (6).

2. The precast concrete floor according to claim 1, characterized in that: The additional steel bars (7) are arranged crosswise with the additional steel bar cage (4) extending outward from the concrete beam.

3. The precast concrete floor according to claim 1 or 2, characterized in that: The post-cast concrete layer (9) covers the precast concrete slab (5), and the additional steel cage (4) of the concrete beam extends into the post-cast concrete layer (9).

4. A construction method for a precast concrete floor, characterized in that: The following steps are involved: Embedding stirrups (3) in a precast concrete beam (1), welding an additional steel cage (4) on the top of the stirrups (3), extending the additional steel cage (4) to the outside of the precast concrete beam (1), and arranging the width of the additional steel cage (4) to be smaller than the width of the stirrups (3), and hoisting the precast concrete beam (1) to a predetermined position; supporting the end of a precast concrete slab (5) on a reserved space on the periphery of the precast concrete beam (1) and contacting the additional steel cage (4); and filling the gap between the additional steel cages (4) between two adjacent precast concrete slabs (5) with concrete to form a post-cast concrete layer (9); Before filling concrete in the gap of the additional reinforcement cage (4), the method further comprises: The step of horizontally arranging additional steel bars (7) in the strip-shaped slots (6) of the precast concrete slab (5); The method further comprises the step of laying the concrete post-casting layer (9) on top of the precast concrete slab (5); The strip-shaped slot (6) is opened from the top of the precast concrete slab (5) and does not completely penetrate the bottom of the precast concrete slab (5). An additional steel bar (7) is horizontally arranged in the strip-shaped slot (6). Both ends of the additional steel bar (7) extend into two oppositely arranged strip-shaped slots (6). The additional steel bar (7) and the additional steel bar cage (4) are arranged crosswise. The length of the additional steel bar (7) is equal to the distance between the ends of the slots of the opposite strip-shaped slots (6).

5. The construction method of precast concrete floor according to claim 4, characterized in that: Also includes: The step of roughening the top surface of the precast concrete panel (5) to form a roughened structure (8).

6. The construction method of the precast concrete floor according to claim 4 or 5, characterized in that: It also includes the step of pre-embedding a plurality of longitudinal reinforcements (2) in the precast concrete beam (1).

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