Fully-prefabricated beam-slab integrated floor system

Abstract

The utility model relates to a fully-prefabricated beam-slab integrated floor system. The floor system comprises fully-prefabricated beam-slab units, prefabricated superposed frame beams and stand columns. The stand columns are distributed in an array mode, the prefabricated laminated frame beams are erected between the adjacent stand columns, and flange bearing pieces are arranged on the side walls of the prefabricated laminated frame beams. The precast beam plate unit comprises a reinforced concrete plate and a flange, and the flange is erected on the beam plate bearing piece or the flange bearing piece; annular steel bars are arranged at the ends of the prefabricated beam and slab units. The prefabricated superposed frame beam is provided with a low-position opening hoop and a high-position opening hoop; the low-position opening hoop is matched with a cap steel bar for the beam; the annular steel bars and the high-position opening hoops are distributed in a staggered mode. And concrete is cast on site at each joint. A laminated slab of an existing beam-slab integrated unit is replaced with the full-prefabricated slab, and due to the fact that rigidity is increased, production and installation of the beam-slab integrated unit with the larger width can be achieved; meanwhile, the construction cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of construction, in particular to a fully prefabricated beam-slab integrated floor slab. Background Art

[0002] When existing prefabricated concrete buildings use composite floor slabs and prefabricated composite beams, they usually need to be supported at the construction stage. When the floor height is large, the support system is complex and expensive. Therefore, in order to speed up the construction and reduce the cost of project construction measures, it is of great practical value to realize the construction of prefabricated structures without support and mold.

[0003] In order to solve the above problems, CN113123516A discloses a precast concrete structure with integrated beams and slabs and a construction method, which significantly improves the construction speed and reduces the cost.

[0004] However, in certain scenarios, such as building units that do not require pre-buried pipelines, if the subsequent pouring of the composite floor slab can be reduced, the construction speed can be further improved. At the same time, the existing beam-slab integrated prefabricated floor slabs use composite floor slabs in the floor area of ​​the beam-slab unit, resulting in a thin prefabricated slab, which limits the width of the beam-slab unit. Utility Model Content

[0005] The utility model aims to provide a fully prefabricated beam-slab integrated floor slab with faster construction speed and lower construction cost.

[0006] The purpose of the utility model is achieved through the following technical solutions:

[0007] A fully prefabricated beam-slab integrated floor, comprising fully prefabricated beam-slab units, prefabricated composite frame beams and columns;

[0008] The columns are distributed in an array, and the upper ends thereof are provided with beam and slab support members for supporting the prefabricated beam and slab units and beam support members for supporting the prefabricated composite frame beams;

[0009] The prefabricated composite frame beam has a rectangular cross section as a whole, and its two ends are respectively mounted on the beam support members of the adjacent columns on the left and right sides, and a flange support member is provided on the front and / or rear side wall of the prefabricated composite frame beam;

[0010] The prefabricated beam-slab unit comprises a reinforced concrete slab, and the left and right sides of the reinforced concrete slab are respectively provided with flanges extending downward and forward and backward. The prefabricated beam-slab unit is arranged between two parallel prefabricated composite frame beams, and its flange is mounted on the beam-slab support member or the flange support members on the opposite sides of the two parallel prefabricated composite frame beams; the front and rear sides of the reinforced concrete slab are both provided with a plurality of groups of annular steel bars extending out of the reinforced concrete slab, and the plurality of groups of annular steel bars are arranged in sequence along the left and right directions;

[0011] A groove A is provided at the corner of the top of the flange, and a stirrup A extending out of the top surface of the groove A is provided in the groove A;

[0012] Between any two adjacent precast beam-slab units, a post-installed connecting steel bar is provided at the groove A;

[0013] The top surface of the prefabricated composite frame beam is provided with a groove B extending along the length direction thereof; the prefabricated composite frame beam is provided with a low-position open hoop and a high-position open hoop extending out of the groove B; the prefabricated composite frame beam is also provided with longitudinal steel bars A extending out of both ends;

[0014] The prefabricated composite frame beams are provided with post-installed beam cap steel bars, which are arranged through the entire length to cover all prefabricated composite frame beams in the same extension direction, and the beam cap steel bars cooperate with the low-position open hoop to form a closed reinforcement structure;

[0015] The circular reinforcement and high-position open hoops of reinforced concrete slabs are staggered;

[0016] Pour concrete on site on the groove A of the precast beam-slab unit and the precast composite frame beam. The cast-in-place concrete must cover the connecting steel bars and the beam cap steel bars.

[0017] Compared with the prior art, the advantages of the utility model are:

[0018] 1. The utility model replaces the composite slab area of ​​the existing beam-slab integrated unit with a fully prefabricated slab, which reduces the steps of pouring concrete on the slab surface, reduces the number of wet operations on site, and further improves the construction speed.

[0019] 2. The utility model significantly reduces the number of prefabricated concrete components and the number of joints on site. The connection areas of the prefabricated components have more than 10 cm of post-poured concrete, which can ensure the integrity and waterproofness of the floor.

[0020] 3. Due to the presence of annular steel bars in the reinforced concrete slab, the reliable connection between the fully prefabricated beam-slab units and the prefabricated composite frame beams is guaranteed; it should be noted that due to the presence of annular steel bars, in order to ensure the placement of beam cap steel bars, low-position open hoops and high-position open hoops are set at the same time. Through the coordination of the low-position open hoops and beam cap steel bars, and the coordination of the high-position open hoops and annular steel bars, the reliable connection between the fully prefabricated beam-slab units and the prefabricated composite frame beams is ensured.

[0021] 4. The utility model replaces the composite plate area of ​​the existing beam-slab integrated unit with a fully prefabricated plate. Due to the increased rigidity, the production and installation of beam-slab integrated units with a larger width can be achieved; at the same time, since there is no need to set truss reinforcement, the construction cost can be further reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the fully prefabricated beam-slab integrated floor slab described in the utility model.

[0023] Figure 2 It is a schematic diagram of the structure of the column.

[0024] Figure 3 It is a structural schematic diagram of prefabricated composite frame beams.

[0025] Figure 4 It is a structural schematic diagram of the precast beam-slab unit.

[0026] Figure 5 It is a schematic diagram of the structure of connecting steel bars.

[0027] Figure 6 It is a structural diagram of cap reinforcement for beams.

[0028] Figure 7 It is a schematic diagram of the construction steps of the utility model (steps 1 and 2).

[0029] Figure 8 It is a schematic diagram of the construction steps of the utility model (step 3).

[0030] Fig. 9 It is a schematic diagram of the construction steps of the utility model (before placing the cap steel bars for the beam in step 4).

[0031] Fig.10 It is a schematic diagram of the construction steps of the utility model (after the cap steel bars for the beams are placed in step 4).

[0032] Fig.11 It is a schematic diagram of the construction steps of the utility model (step 5);

[0033] Fig.12 It is a schematic diagram of the construction steps of the utility model (step 6);

[0034] Fig.13 It is the cross-section of the beam before the cap reinforcement is placed;

[0035] Fig.14 Sectional view of beam after cap reinforcement is placed;

[0036] Fig.15 This is the cross-sectional view before the precast beam-slab unit is placed;

[0037] Fig.16 This is the cross-sectional view after the precast beam-slab unit is placed;

[0038] Fig.17 It is a schematic diagram of the structure of the flange supporting member.

[0039] Explanation of numbers: 1 precast beam-slab unit, 11 reinforced concrete slab, 12 flange, 13 circular steel bar, 14 groove A, 15 stirrup A, 16 connecting steel bar, 161 full-length steel bar A, 162 closed tie bar, 17 longitudinal steel bar B, 18 shear key slot B, 2 precast composite frame beam, 21 groove B, 22 low-position open hoop, 23 high-position open hoop, 24 longitudinal steel bar A, 25 beam cap steel bar, 251 full-length steel bar B, 252 tie bar, 3 column, 31 beam-slab support, 32 beam support, 4 flange support, 41 anchor plate, 42 anchor steel bar, 43 channel steel plate. DETAILED DESCRIPTION

[0040] The present invention is described in detail below with reference to the accompanying drawings and embodiments:

[0041] like Figure 1-17 Shown is a schematic diagram of an embodiment of a fully prefabricated beam-slab integrated floor provided by the utility model.

[0042] A fully prefabricated beam-slab integrated floor, comprising a fully prefabricated beam-slab unit 1, a prefabricated composite frame beam 2 and a column 3;

[0043] The columns 3 are arranged in an array, and the upper ends thereof are provided with beam and slab support members 31 for supporting the prefabricated beam and slab units 1 and beam support members 32 for supporting the prefabricated composite frame beams 2;

[0044] The prefabricated composite frame beam 2 has a rectangular cross section as a whole, and its two ends are respectively mounted on the beam support members 32 of the adjacent columns 3 on the left and right sides, and a flange support member 4 is provided on the front and / or rear side walls of the prefabricated composite frame beam 2;

[0045] The precast beam and slab unit 1 comprises a reinforced concrete slab 11, and the left and right sides of the reinforced concrete slab 11 are respectively provided with flanges 12 extending downward and forward and backward. The precast beam and slab unit 1 is arranged between two parallel precast composite frame beams 2, and its flange 12 is mounted on the beam and slab support member 31 or the flange support member 4 on the opposite side of the two parallel precast composite frame beams 2; the front and rear sides of the reinforced concrete slab 11 are both provided with a plurality of groups of annular steel bars 13 extending from the reinforced concrete slab 11, and the plurality of groups of annular steel bars 13 are arranged in sequence along the left and right directions;

[0046] A groove A14 is formed at the corner of the top of the flange 12, and a stirrup A15 extending from the top surface of the groove A14 is provided in the groove A14;

[0047] Between any two adjacent precast beam-slab units 1, a post-installed connecting steel bar 16 is provided at the groove A14;

[0048] The top surface of the prefabricated composite frame beam 2 is provided with a groove B21 extending along its length direction; the prefabricated composite frame beam 2 is provided with a low-position open hoop 22 and a high-position open hoop 23 extending from the groove B21; the prefabricated composite frame beam 2 is also provided with longitudinal steel bars A24 extending from both ends;

[0049] A post-installed beam cap steel bar 25 is provided on the prefabricated composite frame beam 2. The beam cap steel bar 25 is provided through the entire length to cover all prefabricated composite frame beams 2 in the same extension direction. The beam cap steel bar 25 cooperates with the low-position open hoop 22 to form a closed hoop structure.

[0050] The annular reinforcement 13 and the high-position open hoop 23 of the reinforced concrete slab 11 are staggered;

[0051] In-situ concrete is poured on the groove A14 of the precast beam-slab unit 1 and the precast composite frame beam 2 , and the in-situ concrete needs to cover the connecting steel bars 16 and the beam cap steel bars 25 .

[0052] The structure and principle of the utility model are basically similar to those of CN113123516A. The fully prefabricated beam-slab unit 1, the prefabricated composite frame beam 2 and the column 3 are all reinforced concrete structures. The biggest difference from CN113123516A is that the plate structure in the middle of the fully prefabricated beam-slab unit 1 is different from the top structure of the prefabricated composite frame beam 2. The utility model replaces the composite plate with a fully prefabricated plate. Accordingly, the thickness of the plate part is increased as a whole, and an annular steel bar 13 is added to the front and rear sides of the fully prefabricated beam-slab unit 1 to cooperate with the open hoop of the prefabricated composite frame beam 2. Since the prefabricated composite frame beam 2 needs to be placed with a cap steel bar, the open hoop here is divided into a low-position open hoop 22 and a high-position open hoop 23.

[0053] The flange 12 that matches the beam-slab support 31 is provided with longitudinal reinforcement B17 inside, and the end face of the flange 12 is provided with a shear keyway B18; wherein the longitudinal reinforcement B17 extends into the beam-column node. The corresponding column top is also provided with vertical reinforcement. The beam-slab support 31 is provided with longitudinal reinforcement B17, shear keyway B18, and vertical reinforcement on the column, mainly for the purpose of improving the connection strength at the beam-column node.

[0054] The two end faces of the prefabricated composite frame beam 2 are provided with shear key grooves A26, which are also for improving the connection strength of the connection.

[0055] like Figure 5 As shown: the connecting steel bar 16 includes a full-length steel bar A161 and a closed tie bar 162; a plurality of full-length steel bars A are arranged in parallel, and a plurality of closed tie bars 162 are arranged between the full-length steel bars A, and the closed tie bars 162 are arranged in sequence in the extension direction of the full-length steel bars A. The connecting steel bars 16 simultaneously serve as the shear reinforcement steel bars of the flange 12 and the connecting steel bars of the adjacent beam-slab integrated unit.

[0056] like Figure 6 As shown: the beam cap reinforcement 25 includes a full-length reinforcement B251 and a tie rod 252; a plurality of full-length reinforcements B251 are arranged in an array, and tie rods 252 are provided outside the full-length reinforcements B251; and the tie rods 252 are arranged in sequence in the extension direction of the full-length reinforcements B251.

[0057] The beam-slab supporting member 31 and the beam supporting member 32 are both steel brackets, and the two steel brackets are locked on the side walls of the column 3 respectively.

[0058] like Fig.17 As shown: the flange supporting member 4 includes an anchor plate 41, anchor steel bars 42 and a grooved steel plate 43; the anchor steel bars 42 are arranged on the inner side of the anchor plate 41, and the anchor plate 41, the anchor steel bars 42 and the prefabricated composite frame beam 2 are integrally cast; the grooved steel plate 43 is arranged on the outer side of the anchor plate 41, and the groove of the grooved steel plate 43 faces upward, and the inner contour of the groove can simultaneously insert the flanges 12 of two adjacent fully prefabricated beam and slab units 1.

[0059] like Figure 7-12 As shown: A construction method of a fully prefabricated beam-slab integrated floor, which includes the following steps:

[0060] S1. Complete the array construction of columns 3;

[0061] S2. According to the height of the precast beam unit 1 and the precast composite frame beam 2, the beam support member 31 and the beam support member 32 are connected to the column 3;

[0062] S3. The prefabricated composite frame beam 2 is mounted on two columns 3, and the ends of the prefabricated composite frame beam 2 are supported on the beam support member 32;

[0063] S4. The cap steel bar 25 for the beam is hoisted into the groove B21 of the prefabricated composite frame beam 2, wherein the cap steel bar 25 for the beam covers all the prefabricated composite frame beams 2 in the same extension direction, and the tie bars 252 and the low-position opening hoop 22 of the cap steel bar 25 for the beam are arranged in a staggered manner;

[0064] S5. The precast beam unit 1 is placed between the precast composite frame beams 2, the flange 12 on one side of the precast beam unit 1 is supported on the beam support member 31 or the flange support member 4, and the flange 12 on the other side is supported on the flange support member 4; wherein the annular reinforcement 13 and the high-position open hoop 23 are staggered;

[0065] S6. The connecting steel bar 16 is hoisted to the groove A14 of two adjacent precast beam-slab units 1, wherein the closed tie bars 162 and stirrups A15 of the connecting steel bar 16 are arranged in a staggered manner;

[0066] S7. Concrete is poured on the groove A14 of the precast beam-slab unit 1 and the precast composite frame beam 2.

[0067] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fully prefabricated beam-slab integrated floor, characterized in that: It includes a fully prefabricated beam-slab unit (1), a prefabricated composite frame beam (2) and a column (3); The columns (3) are arranged in an array, and the upper ends of the columns are provided with beam and slab support members (31) for supporting the prefabricated beam and slab units (1) and beam support members (32) for supporting the prefabricated composite frame beams (2); The cross section of the prefabricated composite frame beam (2) is rectangular as a whole, and its two ends are respectively mounted on the beam support members (32) of the adjacent columns (3) on the left and right sides, and a flange support member (4) is provided on the front and / or rear side walls of the prefabricated composite frame beam (2); The prefabricated beam and slab unit (1) comprises a reinforced concrete slab (11), and the left and right sides of the reinforced concrete slab (11) are respectively provided with flanges (12) extending downward and forward and backward. The prefabricated beam and slab unit (1) is arranged between two parallel prefabricated composite frame beams (2), and its flange (12) is mounted on a beam and slab support member (31) or a flange support member (4) on the opposite side of the two parallel prefabricated composite frame beams (2); the front and rear sides of the reinforced concrete slab (11) are both provided with a plurality of groups of annular steel bars (13) extending out of the reinforced concrete slab (11), and the plurality of groups of annular steel bars (13) are arranged in sequence along the left and right directions; A groove A (14) is provided at a corner of the top of the flange (12), and a stirrup A (15) is provided in the groove A (14) and extends out of the top surface of the groove A (14); Between any two adjacent prefabricated beam-slab units (1), a post-placed connecting steel bar (16) is provided at the groove A (14); The top surface of the prefabricated composite frame beam (2) is provided with a groove B (21) extending along the length direction thereof; the prefabricated composite frame beam (2) is provided with a low-position opening hoop (22) and a high-position opening hoop (23) extending out of the groove B (21); the prefabricated composite frame beam (2) is also provided with longitudinal steel bars A (24) extending out from both ends; A post-mounted beam cap steel bar (25) is provided on the prefabricated composite frame beam (2), the beam cap steel bar (25) is arranged throughout the entire length to cover all prefabricated composite frame beams (2) in the same extension direction, and the beam cap steel bar (25) cooperates with a low-position open hoop (22) to form a closed hoop structure; The annular steel bars (13) and the high-position open hoop (23) of the reinforced concrete slab (11) are staggeredly distributed; In-situ concrete is poured on the groove A (14) of the prefabricated beam-slab unit (1) and the prefabricated composite frame beam (2), and the in-situ concrete needs to cover the connecting steel bars (16) and the beam cap steel bars (25).

2. The fully prefabricated beam-slab integrated floor according to claim 1 is characterized in that: A longitudinal steel bar B (17) is arranged inside the flange (12) matched with the beam-slab supporting member (31), and a shear key groove B (18) is arranged on the end surface of the flange (12); wherein the longitudinal steel bar B (17) extends into the beam-column node.

3. The fully prefabricated beam-slab integrated floor according to claim 1 is characterized in that: Shear-resistant key grooves A (26) are provided on both end surfaces of the prefabricated composite frame beam (2).

4. The fully prefabricated beam-slab integrated floor according to claim 1 is characterized in that: The connecting steel bars (16) include full-length steel bars A (161) and closed tie bars (162); a plurality of full-length steel bars A are arranged in parallel, a plurality of closed tie bars (162) are arranged between the full-length steel bars A, and the closed tie bars (162) are arranged in sequence in the extension direction of the full-length steel bars A.

5. The fully prefabricated beam-slab integrated floor according to claim 1 is characterized in that: The beam cap steel bar (25) comprises a full-length steel bar B (251) and a tension bar (252); a plurality of full-length steel bars B (251) are arranged in an array, and a tension bar (252) is arranged outside the full-length steel bars B (251); and the tension bar (252) is arranged in sequence in the extension direction of the full-length steel bars B (251).

6. The fully prefabricated beam-slab integrated floor according to claim 1 is characterized in that: The beam and slab supporting member (31) and the beam supporting member (32) are both steel brackets, and the two steel brackets are respectively locked on the side walls of the column (3).

7. The fully prefabricated beam-slab integrated floor according to claim 1 is characterized in that: The flange support member (4) comprises an anchor plate (41), anchoring steel bars (42) and a grooved steel plate (43); the anchoring steel bars (42) are arranged on the inner side of the anchor plate (41), and the anchor plate (41), the anchoring steel bars (42) and the prefabricated composite frame beam (2) are integrally cast; the grooved steel plate (43) is arranged on the outer side of the anchor plate (41), the groove of the grooved steel plate (43) faces upward, and the inner contour of the groove can simultaneously insert the flanges (12) of two adjacent fully prefabricated beam and plate units (1).

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