Support-free and mold-free beam-slab integrated super-long concrete structure of floor system

Abstract

The utility model relates to a floor support-free and mold-free beam-slab integrated super-long concrete structure, a super-long building structure comprises a stand column, a precast beam and a beam-slab integrated unit, the bottom of the outer side wall of a rib beam of the beam-slab integrated unit is provided with a cantilever edge, and a casting groove extending in the front-back direction is formed between the two rib beams; prestressed tendons penetrating through the tendon passing holes are arranged in the casting grooves, embedded components are arranged at the positions, close to the tensioning ends and the anchoring ends of the prestressed tendons, of the ribbed beams, and concrete is poured after the Y-direction cap steel bars and the X-direction cap steel bars are arranged. According to the invention, the implementation of post-tensioning prestress on site is realized, and the feasibility of the prefabricated super-long concrete structure is ensured.

Description

Technical Field

[0001] The utility model relates to an integral long concrete structure of beam and slab for floor slab without support and formwork Background Art

[0002] At present, the common long concrete structures basically adopt the cast-in-place process of reinforced concrete instead of the prefabricated and assembled process. The main reason is to consider the influence of temperature stress on the building structure.

[0003] Specifically, the current prefabricated and assembled buildings all adopt modular components. When setting temperature prestressed steel bars, only sectional design can be carried out, resulting in the non - continuous transmission of the overall tension of the prestressed steel bars between each module during the on - site construction process. That is to say, for the current construction process, the temperature prestressed steel bars that ensure the long concrete structure does not crack must be placed on the construction site. At present, there is no relevant technology to solve the problem of how to effectively structure the temperature prestressed steel bars and prefabricated and assembled components to ensure the reliable transmission of the overall tension of the prestressed steel bars. Summary of the Utility Model

[0004] The purpose of the utility model is: an integral long concrete structure of beam and slab for floor slab without support and formwork, which can realize the construction of the prefabricated long concrete structure without support and formwork, solve the problem that the temperature prestressed steel bars cannot be combined with the prefabricated building, and shorten the construction period of the long concrete structure.

[0005] The utility model is realized through the following technical solutions: an integral long concrete structure of beam and slab for floor slab without support and formwork, including

[0006] Columns 1, which are of reinforced concrete structure and are distributed in an array. On the left or / and right side of the top of any column 1, there is a steel corbel 11 for beam, and on the front or / and rear side of the top of any column 1, there is a first steel corbel 12. On the top surface of column 1, there is a column steel bar 13 extending upward;

[0007] Prefabricated beams 2, which are of reinforced concrete structure, extend left - right and are arranged between two adjacent columns 1. The steel corbel 11 for beam of column 1 supports the prefabricated beam 2; on the top of the prefabricated beam 2, there is a beam groove 21 extending left - right, and on the front and rear sides of the beam groove 21, there are stirrup bending parts 22 extending out of the top surface of the prefabricated beam 2 and bending towards each other; at the front and rear ends of the prefabricated beam 2, there are beam extension steel bars 23 extending out of the end surface of the prefabricated beam 2, and key grooves 24 are arranged on the front and rear end surfaces of the prefabricated beam 2; on the front or / and rear side of the prefabricated beam 2, there is also a second steel corbel 25, and through - bar holes 26 are arranged in the area of the side wall of the prefabricated beam 2 corresponding to the upper part of each second steel corbel 25;

[0008] The beam-slab integrated unit 3 is made of reinforced concrete and is divided into a flat slab 31 and rib beams 32 that extend downward and are arranged on the left and right sides of the flat slab 31; the surface of the flat slab 31 is provided with truss bars 311, and a notch 33 that extends in the front-back direction is provided at the top of the outer side of the rib beam 32, and the steel bars in the rib beam 32 extend to the notch 33 to form a closed hoop 34;

[0009] The beam-slab integrated unit 3 is located between two adjacent precast beams 2 in the front-back direction, and the rib beam 32 is placed on the first steel corbel 12 and the second steel corbel 25; among them, rib beam extension steel bars 35 that extend out of the end face of the rib beam 32 are provided at the front and rear ends of the rib beam 32 erected on the first steel corbel 12;

[0010] Among them, a cantilever 36 that extends in the front-back direction is provided at the bottom of the outer side wall of the rib beam 32, so that a casting groove 37 that extends in the front-back direction is formed between two rib beams 32 that are jointly supported on the same first steel corbel 12 or the same second steel corbel 25;

[0011] Multiple casting grooves 37 that are connected and arranged in sequence in the front-back direction together form a prestressed tensioning section;

[0012] At the front end of the outer side wall surface of the rib beam 32 of the beam-slab integrated unit 3 at the frontmost end of the prestressed tensioning section and at the rear end of the outer side wall surface of the rib beam 32 of the beam-slab integrated unit 3 at the rearmost end of the prestressed tensioning section, embedded components 5 are further provided. The embedded component 5 includes a steel plate 51 and a plurality of rib plates 52 that are vertically arranged on the inner and outer side surfaces of the steel plate 51; the rib plates 52 on the inner side of the middle of the steel plate are embedded in the rib beam 32;

[0013] Prestressed tendons 41 are also provided in the casting groove 37; after the prestressed tendons 41 that intersect with the precast beam 2 pass through the tendon holes 26 of the precast beam 2 at the front end of the building structure and enter the casting groove 37, they alternately pass through the tendon holes 26 and the casting groove 37 in the same extension direction and then pass through the tendon holes 26 of the precast beam 2 at the rear end of the building structure; one end of the prestressed tendon 41 is provided with an anchoring end and the other end of the prestressed tendon 41 is provided with a tensioning end;

[0014] Y-direction capping steel bars 6 that are arranged longitudinally are placed at the casting groove 37, and X-direction capping steel bars 7 that are arranged longitudinally are placed on the precast beam;

[0015] Cast-in-place concrete 8 is poured on the surfaces of the beam-slab integrated unit 3, the precast beam 2, the column 1, the casting groove 37 and the corresponding joints; after the cast-in-place concrete 8 reaches the design strength, the tensioning end of the prestressed tendon 41 is tensioned, and after the tensioning is completed, the tensioning end of the prestressed tendon 41 is fixed to the main structure through the end assembly of the prestressed tendon 41.

[0016] Compared with the prior art, the beneficial effects of the present utility model are:

[0017] 1. Compared with the traditional beam-slab integrated building structure, by setting a cantilever along the rib beam, a casting groove is formed between two adjacent beam-slab integrated units. This casting groove, in combination with the tendon passing holes, makes it possible to place the prestressed tendons on-site; the prestress of the prestressed tendons is applied by post-tensioning the prestressed tendons (i.e., tensioning the prestressed tendons after casting the concrete).

[0018] 2. By setting embedded components 5 on the outer wall surface of the rib beam 32, and the embedded components are respectively close to the anchorage end and the tensioning end of the prestressed tendon 41, it is ensured that the connection surface between the cast-in-place concrete and the precast concrete will not be displaced, thereby ensuring the implementation of on-site post-tensioning prestress and the feasibility of the precast and assembled super-long concrete structure.

[0019] 3. All the advantages of the beam-slab integrated building structure are retained, with low transportation costs, low installation difficulty, and the characteristics of being free from bracing and formwork during the construction process. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the column;

[0021] Figure 2 is a schematic structural diagram of the precast beam;

[0022] Figure 3 is a schematic structural diagram of the beam-slab integrated unit;

[0023] Figure 4 is a schematic structural diagram of the embedded component;

[0024] Figure 5 is a schematic structural diagram of the prestressed tendon;

[0025] Figure 6 is a schematic diagram of Step 1;

[0026] Figure 7 is a schematic diagram of Step 2;

[0027] Figure 8 is a schematic diagram of Step 3;

[0028] Figure 9 is a schematic diagram of Step 4;

[0029] Figure 10 is a schematic diagram of Step 5;

[0030] Figure 11 is a schematic diagram of Step 6;

[0031] Figure 12 is an enlarged view of the end of the rib beam in the beam-slab integrated unit;

[0032] Figure 13Schematic diagram of splicing two beam-slab integrated units to form a casting groove and placing prestressed tendons;

[0033] Figure 14 Based on Figure 13 Schematic diagram of placing Y-direction capping steel bars;

[0034] Figure 15 Based on Figure 14 State diagram of completing Y-direction capping steel bars;

[0035] Figure 16 Based on Figure 15 Cast-in-place concrete is completed.

[0036] Label description: 1 - Column, 11 - Steel corbel for beam, 12 - First steel corbel, 13 - Column steel bars, 2 - Prefabricated beam, 21 - Beam groove, 22 - Bent part of stirrup, 23 - Extended beam steel bars, 24 - Keyway, 25 - Second steel corbel, 26 - Reinforcement hole, 3 - Beam-slab integrated unit, 31 - Flat plate, 311 - Truss steel bars, 32 - Ribbed beam, 33 - Notch, 34 - Closed hoop, 35 - Extended ribbed beam steel bars, 36 - Cantilever, 37 - Casting groove, 41 - Prestressed tendon, 42 - Sealing plate, 43 - Spiral steel bars, 5 - Embedded component, 51 - Steel plate, 52 - Ribbed plate, 6 - Y-direction capping steel bars, 61 - Y-direction continuous steel bars, 62 - First closed tie bar, 7 - X-direction capping steel bars, 8 - Cast-in-place concrete. Specific implementation mode

[0037] The following is a detailed description of the present invention with reference to the accompanying drawings:

[0038] As Figures 1-5 shown: The beam-slab integrated super-long concrete structure without form support for floor slab includes

[0039] Columns 1, which are of reinforced concrete structure and are arranged in an array. On the left or / and right side of the top of any column 1, there is a steel corbel 11 for beam, and on the front or / and rear side of the top of any column 1, there is a first steel corbel 12. On the top surface of column 1, there are column steel bars 13 extending upward;

[0040] Here, the steel corbel 11 for beam is mainly used to support the prefabricated beam 2, the first steel corbel 12 is used to support the beam-slab integrated unit 3, and the setting of the column steel bars 13 ensures the reliability of the connection after the concrete is cast later at the beam-column joint.

[0041] The precast beam 2 is of reinforced concrete structure, extends horizontally and is arranged between two adjacent columns 1. The beam of the column 1 uses a steel corbel 11 to support the precast beam 2; a horizontally extending beam groove 21 is provided at the top of the precast beam 2, and stirrup bending parts 22 extending out of the top surface of the precast beam 2 and bending towards each other are provided on the front and rear sides of the beam groove 21; beam extension steel bars 23 extending out of the end surface of the precast beam 2 are provided at the front and rear ends of the precast beam 2, and key grooves 24 are provided on the front and rear end surfaces of the precast beam 2; a second steel corbel 25 is further provided on the front or / and rear side of the precast beam 2, and through-bar holes 26 are provided in the area of the side wall of the precast beam 2 corresponding to the upper part of each second steel corbel 25;

[0042] The second steel corbel 25 is used to support the beam-slab integrated unit 3. The beam groove 21, the stirrup bending part 22, the key groove 24, and the beam extension steel bar 23 are all for improving the connection strength with the post-cast concrete.

[0043] The beam-slab integrated unit 3 is of reinforced concrete structure, and is divided into a flat slab 31 and rib beams 32 extending downward and respectively arranged on the left and right sides of the flat slab 31; truss steel bars 311 are provided on the surface of the flat slab 31, a horizontally extending notch 33 is provided at the top outside the rib beam 32, and the steel bars in the rib beam 32 extend to the notch 33 to form a closed stirrup 34;

[0044] The beam-slab integrated unit 3 is located between two adjacent precast beams 2 in the front and rear, and the rib beams 32 are placed on the first steel corbels 12 and the second steel corbels 25; rib beam extension steel bars 35 extending out of the end surface of the rib beam 32 are provided at the front and rear ends of the rib beam 32 supported on the first steel corbels 12;

[0045] The above beam-slab integrated unit is basically the same as the overall structure of the beam-slab integrated unit publicly disclosed by the applicant at an earlier stage, except that a horizontally extending cantilever 36 is provided at the bottom of the outer side wall of the rib beam 32, so that a horizontally extending casting groove 37 is formed between two rib beams 32 commonly supported on the same first steel corbel 12 or the same second steel corbel 25; the formed casting groove 37 cooperates with the through-bar hole 26 for placing prestressing tendons.

[0046] A plurality of casting grooves 37 arranged in sequence in the front and rear directions together form a prestressing tensioning section;

[0047] Embedded members 5 are further provided at the front end of the outer side wall surface of the rib beam 32 of the beam-slab integrated unit 3 located at the forefront of the prestressing tensioning section and at the rear end of the outer side wall surface of the rib beam 32 of the beam-slab integrated unit 3 located at the rearmost end of the prestressing tensioning section. The embedded member 5 includes a steel plate 51 and a plurality of rib plates 52 vertically arranged on the inner and outer side surfaces of the steel plate 51; the rib plates 52 on the inner side of the middle of the steel plate are embedded in the rib beam 32;

[0048] The casting groove 37 is also provided with prestressed tendons 41; the prestressed tendons 41 intersecting with the precast beam 2 penetrate into the casting groove 37 through the tendon passing holes 26 at the front end of the precast beam 2 in the prestressed tensioning section, and then alternately pass through the tendon passing holes 26 and the casting groove 37 in the same extending direction, and then penetrate out of the tendon passing holes 26 at the rear end of the precast beam 2 in the prestressed tensioning section; one end of the prestressed tendon 41 is fixed to the precast beam 2 to form an anchorage end and the other end of the prestressed tendon 41 forms a tensioning end;

[0049] It should be noted that the embedded member 5 here is essentially arranged in the areas close to the anchorage end and the tensioning end of the prestressed tendon 41 respectively, and its main function is to ensure that the connection surface between the cast-in-place concrete and the precast concrete does not move.

[0050] The Y-direction capping steel bars 6 arranged longitudinally are placed at the casting groove 37, and the X-direction capping steel bars 7 arranged longitudinally are placed on the precast beam;

[0051] Cast-in-place concrete 8 is poured on the surface of the beam-slab integrated unit 3, the precast beam 2, the column 1, the casting groove 37 and the corresponding joints; after the cast-in-place concrete 8 reaches the design strength, the tensioning end of the prestressed tendon 41 is tensioned, and after the tensioning is completed, the tensioning end of the prestressed tendon 41 is fixed to the main structure through the end component of the prestressed tendon 41.

[0052] The Y-direction capping steel bar 6 includes a Y-direction longitudinally arranged steel bar 61 and a first closed stirrup 62. A plurality of Y-direction longitudinally arranged steel bars 61 are located in the same plane, and a number of first closed stirrups 62 are sequentially arranged in the extending direction of the Y-direction longitudinally arranged steel bar 61; the X-direction capping steel bar 7 includes an X-direction longitudinally arranged steel bar and a second closed stirrup, and a plurality of X-direction longitudinally arranged steel bars are located in the same plane, and a number of second closed stirrups are sequentially arranged in the extending direction of the X-direction longitudinally arranged steel bar.

[0053] The end component includes a sealing plate 42 located at the end of the prestressed tendon 41 and a spiral stirrup 43 located inside the sealing plate 42. The structures and usage methods of the sealing plate 42 and the spiral stirrup 43 here are prior arts and can be referred to the applications of traditional cast-in-place building structures.

[0054] As Figures 6-16 shown: A construction method of a beam-slab integrated super-long concrete structure without support for floor slabs, characterized by comprising the following steps:

[0055] S1, arranging the columns 1 in an array (as Figure 6 shown);

[0056] S2, hoisting the precast beam 2 between two adjacent columns 1, wherein both ends of the precast beam 2 are supported on the beam steel corbels 11 of the columns 1, and the beam extension steel bars 23 of the precast beam 2 extend above the columns 1 (as Figure 7 shown);

[0057] S3. Hoist the beam-slab integrated unit 3 so that the rib beam of the beam-slab integrated unit 3 is supported on the second steel corbel 25 and the first steel corbel 12. The front and rear ends of the rib beam 32 erected on the first steel corbel 12 are provided with rib beam extension steel bars 35 extending out of the end face of the rib beam 32 (as Figure 8 , 12 shown);

[0058] S4. Place prestressed tendons 41 in the casting groove 37 formed between two adjacent beam-slab integrated units 3. Among them, the prestressed tendons 41 intersecting with the precast beam 2 pass through the tendon passing hole 26 at the front end of the precast beam 2 in the prestressed tensioning section and then enter the casting groove 37, and then alternately pass through the tendon passing holes 26 and the casting groove 37 in the same extension direction, and then pass out through the tendon passing hole 26 at the rear end of the precast beam 2 in the prestressed tensioning section; one end of the prestressed tendon 41 is provided with an anchorage end and the other end of the prestressed tendon 41 is provided with a tensioning end (as Figure 9 , 13 shown);

[0059] S5. Hoist the X-direction capping steel bars 7 arranged longitudinally above the precast beam 2, and place the Y-direction capping steel bars 6 arranged longitudinally at the casting groove 37 (as Figure 10 , 14 , 15 shown);

[0060] S6. Cast in-situ concrete 8 on the surfaces of the beam-slab integrated unit 3, the precast beam 2, the column 1, the casting groove 37 and the corresponding joints; after the in-situ concrete 8 reaches the design strength, tension the tensioning end of the prestressed tendon 41, and after the tensioning is completed, fix the tensioning end of the prestressed tendon 41 to the main structure through the end assembly of the prestressed tendon 41 (as Figure 11 , 16 shown).

[0061] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. The integrated long concrete structure of beam and slab with floor slab without bracing and formwork is characterized in that: including Columns (1), which are of reinforced concrete structure and arranged in an array. On the left or / and right side of the top of any column (1), there is a steel corbel (11) for beam, and on the front or / and rear side of the top of any column (1), there is a first steel corbel (12). On the top surface of the column (1), there are column reinforcing bars (13) extending upward; Precast beams (2), which are of reinforced concrete structure, extend horizontally and are arranged between two adjacent columns (1). The steel corbels (11) for beams of the columns (1) support the precast beams (2); on the top of the precast beam (2), there is a beam groove (21) extending horizontally, and on the front and rear sides of the beam groove (21), there are stirrup bending parts (22) extending out of the top surface of the precast beam (2) and bending towards each other; at the front and rear ends of the precast beam (2), there are beam extension reinforcing bars (23) extending out of the end surface of the precast beam (2), and key grooves (24) are provided on the front and rear end surfaces of the precast beam (2); on the front or / and rear side of the precast beam (2), there is also a second steel corbel (25), and through-reinforcement holes (26) are provided in the side wall of the precast beam (2) corresponding to the upper region of each second steel corbel (25); Beam-slab integrated units (3), which are of reinforced concrete structure, are divided into a flat slab (31) and rib beams (32) extending downward and provided on the left and right sides of the flat slab (31); on the surface of the flat slab (31), there are truss reinforcing bars (311), and at the top of the outside of the rib beam (32), there is a notch (33) extending horizontally, and the reinforcing bars in the rib beam (32) extend into the notch (33) to form a closed stirrup (34); The beam-slab integrated units (3) are located between two adjacent precast beams (2) in the front and rear direction, and the rib beams (32) are placed on the first steel corbels (12) and the second steel corbels (25); among them, at the front and rear ends of the rib beam (32) erected on the first steel corbel (12), there are rib beam extension reinforcing bars (35) extending out of the end surface of the rib beam (32); Among them, at the bottom of the outer side wall of the rib beam (32), there is a cantilever (36) extending horizontally, so that a casting groove (37) extending horizontally is formed between two rib beams (32) jointly supported on the same first steel corbel (12) or the same second steel corbel (25); A plurality of casting grooves (37) connected in sequence in the front and rear direction jointly form a prestressed tensioning section; At the front end of the outer side wall surface of the rib beam (32) of the beam-slab integrated unit (3) located at the frontmost end of the prestressed tensioning section and at the rear end of the outer side wall surface of the rib beam (32) of the beam-slab integrated unit (3) located at the rearmost end of the prestressed tensioning section, there are also embedded members (5). The embedded members (5) include steel plates (51) and a number of rib plates (52) vertically arranged on the inner and outer side surfaces of the steel plates (51); the rib plates (52) in the inner side of the steel plate are embedded in the rib beam (32); A prestressed tendon (41) is also provided in the casting groove (37); the prestressed tendon (41) intersecting with the precast beam (2) penetrates into the casting groove (37) from the tendon passing hole (26) at the front end of the precast beam (2) in the prestressed tensioning section, and then alternately passes through the tendon passing hole (26) and the casting groove (37) in the same extension direction, and then passes out from the tendon passing hole (26) at the rear end of the precast beam (2) in the prestressed tensioning section; one end of the prestressed tendon (41) is provided with an anchoring end and the other end of the prestressed tendon (41) is provided with a tensioning end; The Y-direction capping steel bars (6) arranged longitudinally are placed at the casting groove (37), and the X-direction capping steel bars (7) arranged longitudinally are placed on the precast beam; Cast-in-place concrete (8) is cast on the surface of the beam-slab integrated unit (3), the precast beam (2), the column (1), the casting groove (37) and the corresponding joints; after the cast-in-place concrete (8) reaches the design strength, the tensioning end of the prestressed tendon (41) is tensioned, and after the tensioning is completed, the tensioning end of the prestressed tendon (41) is fixed to the main structure through the end component of the prestressed tendon (41).

2. The integral long concrete structure of beam and slab with floor slab without support and formwork according to claim 1, characterized in that, The Y-direction capping steel bar (6) includes a Y-direction longitudinally arranged steel bar (61) and a first closed stirrup (62), and a plurality of Y-direction longitudinally arranged steel bars (61) are located in the same plane and a plurality of first closed stirrups (62) are sequentially arranged in the extension direction of the Y-direction longitudinally arranged steel bar (61); the X-direction capping steel bar (7) includes an X-direction longitudinally arranged steel bar and a second closed stirrup, and a plurality of X-direction longitudinally arranged steel bars are located in the same plane and a plurality of second closed stirrups are sequentially arranged in the extension direction of the X-direction longitudinally arranged steel bar.

3. The integrated long concrete structure of beam and slab with floor slab without support and formwork according to claim 1, characterized in that The end component includes a sealing plate (42) located at the end of the prestressed tendon (41) and a spiral stirrup (43) located inside the sealing plate (42).

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