CN115233812B - Node of precast beam and precast slab and construction method thereof - Google Patents
Node of precast beam and precast slab and construction method thereof Download PDFInfo
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- CN115233812B CN115233812B CN202210782229.XA CN202210782229A CN115233812B CN 115233812 B CN115233812 B CN 115233812B CN 202210782229 A CN202210782229 A CN 202210782229A CN 115233812 B CN115233812 B CN 115233812B
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- precast
- precast slab
- slab
- precast beam
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- 238000010276 construction Methods 0.000 title abstract 2
- 230000000694 effects Effects 0.000 abstract 1
- 239000004570 mortar (masonry) Substances 0.000 abstract 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
- E04B1/215—Connections specially adapted therefor comprising metallic plates or parts
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The application relates to a node of a precast beam and a precast slab and a construction method thereof, and relates to the field of precast assembled structures, wherein the node comprises the precast beam and the precast slab, a frame plate groove is formed at the top of the precast beam, and limiting blocks are fixedly connected to two side walls of the frame plate groove; limiting grooves are formed in two sides of the middle of the precast slab, the middle of the precast slab is connected with the inner wall of the frame plate groove, and the precast slab is arranged on the precast beam. The application has the advantages that the middle part of the precast slab is positioned at the top of the precast beam, after the porous flexible block is added, the filling of high-strength self-leveling mortar is carried out, so that the hardness of the limiting block is enhanced, the precast beam and the precast slab are tightly connected into a whole, and the effect of the connection strength of the precast beam and the precast slab is enhanced.
Description
Technical Field
The application relates to the field of prefabricated assembly structures, in particular to a node of a prefabricated beam and a prefabricated plate and a construction method thereof.
Background
The prefabricated beam and the prefabricated plate are two commonly used objects in the current construction process, and the prefabricated beam is a vertically arranged beam body and is mainly used for supporting the top of the whole building; the prefabricated plate is connected between different precast beams, and the precast plate is mainly used for connecting the tops of a plurality of precast beams, and assists the precast beams to bear the weight of the top of a building together.
In the related art, the chinese application document with application number 201621142333.9 discloses a node of a precast beam and a precast slab, including the precast beam and the precast slab; steps are symmetrically arranged on two sides of the precast beam along the long side direction, and angle steel embedded parts with anchoring short ribs are symmetrically arranged on the corners of the top surface of the precast beam along the two sides of the long side direction; one end of the precast slab along the long side direction is arranged on the step, and a hole is formed in the precast slab from the end surface to the length direction of the precast slab at one end of the precast beam; deformed steel bars are inserted into the holes, and one end of each deformed steel bar, which is close to the precast beam, is fixedly connected to the steel plate; the steel plate is fixedly connected with the angle steel embedded part. The construction method of the node comprises the following steps: 1. when the precast beam is precast, embedding angle steel embedded parts of the precast beam are embedded according to the installation positions of the precast slab and the precast beam; 2. hoisting the precast slab after hoisting the precast beam, placing the precast slab on the step surface of the precast beam, adjusting the position of the precast slab, and ensuring the flatness of the hoisting finished surface of the precast slab; 3. after the precast slab is hoisted, welding a steel plate and an angle steel embedded part on the precast beam; 4. and after welding, grouting slab joints, pouring a cast-in-situ layer, and ensuring the integrity of beam slab connection.
In summary, the inventor considers that two precast slabs are located at two sides of the precast beam, and if the connection strength between the precast beam and the precast slab is relatively poor, the earthquake resistance of the building structure is relatively poor.
Disclosure of Invention
In order to improve the connection strength of the precast beam and the precast slab, the application provides a node of the precast beam and the precast slab and a construction method thereof.
In a first aspect, the present application provides a node between a precast beam and a precast slab, which adopts the following technical scheme:
a node of a precast beam and a precast slab comprises the precast beam and the precast slab, wherein a frame plate groove is formed in the top of the precast beam, and limiting blocks are fixedly connected to two side walls of the frame plate groove; limiting grooves are formed in two sides of the middle of the precast slab, the middle of the precast slab is connected with the inner wall of the frame plate groove, and the precast slab is arranged on the precast beam.
By adopting the technical scheme, the precast slab and the precast beam are connected in such a way that the middle part of the precast slab is positioned at the top of the precast beam, and compared with the traditional precast slab and precast beam connecting structure, the precast slab and precast beam have higher connection stability; the limiting grooves on the precast slabs are formed, so that when a constructor places the precast slabs on the precast beams, the constructor can place the central parts of the precast slabs in the limiting grooves just by taking the positions of the limiting grooves as the standard; and the prefabricated plate and the prefabricated beam are limited by the limiting block and the limiting groove, so that the connection stability of the prefabricated plate and the prefabricated beam is further improved, and the earthquake resistance of the building structure is poor.
Optionally, the limiting block comprises a porous flexible block and high-strength self-leveling mortar, and the porous flexible block is fixedly connected with the side wall of the frame plate groove; the high-strength self-leveling mortar is filled in the porous flexible block.
By adopting the technical scheme, the porous flexible block is arranged, so that a hanging method from top to bottom can be adopted when constructors place the precast slabs on the precast beams, and the porous flexible block is made of a deformable material and does not influence the construction process of placing the precast slabs in the frame plate groove; after the porous flexible block is embedded into the limit groove, filling high-strength self-leveling mortar is carried out, so that the hardness of the limit block is enhanced, the precast beam and the precast slab are tightly connected into a whole, the connection strength of the precast beam and the precast slab is enhanced, and the earthquake resistance of the building structure is poor.
Optionally, the side wall of the frame plate groove is uniformly provided with connecting through holes.
Through adopting above-mentioned technical scheme, the seting of connecting the through-hole for constructor is when filling of high strength self-leveling mortar, and high strength self-leveling mortar can flow in the connecting the through-hole, makes high strength self-leveling mortar flow in the precast beam with precast slab surface, connects precast beam and precast slab into whole.
Optionally, the connecting through hole is an arc hole.
Through adopting above-mentioned technical scheme, because the flow of the liquid of arc hole of being convenient for, and the holding power in arc hole is equivalent to spheroidal local holding power, consequently, the holding power in arc hole is stronger, and the stability of prefabricated plate and precast beam connection is higher.
Optionally, the prefabricated plate bottom surface is connected with the fixed strip group, and the fixed strip group includes horizontal fixed strip and indulges the fixed strip, and horizontal fixed slot and indulge the fixed slot have been seted up to the frame plate tank bottom surface, and horizontal fixed strip is located horizontal fixed slot, indulges the fixed strip and is located indulges the fixed slot.
Through adopting above-mentioned technical scheme, because fixed strip group includes the horizontal fixed strip of different directions and indulges the fixed strip for the prefabricated plate is connected the back with the precast beam, is spacing by horizontal fixed strip and indulge the fixed strip, then the prefabricated plate is difficult to remove in the any direction of prefabrication inslot, has further fixed the relative position of prefabricated plate and precast beam, makes the stability that precast beam and prefabricated plate are connected higher.
Optionally, the long side direction of horizontal fixed strip is perpendicular with the long side direction of indulging the fixed strip, and horizontal fixed strip sets up two sets of, indulges the fixed strip and sets up into one set of, and a set of horizontal fixed strip is located the one side of indulging the fixed strip, and another set of horizontal fixed strip is located the opposite side of indulging the fixed strip.
Through adopting above-mentioned technical scheme, the position setting of horizontal fixed strip and vertical fixed strip for the prefabricated plate is difficult to remove on the precast beam, has guaranteed that the stability that prefabricated plate and precast beam are connected is higher.
Optionally, the steel bars are inserted into the precast slabs and the precast beams.
By adopting the technical scheme, after the steel bars are inserted into the precast slab and the precast beam, the precast slab and the precast beam are further fixed in the vertical direction, so that the connection strength of the precast slab and the precast beam is increased.
In a second aspect, the present application provides a construction method for a node between a precast beam and a precast slab, which adopts the following technical scheme:
a construction method of a node of a precast beam and a precast slab comprises the following steps:
step 1, placing a precast slab on a precast beam according to the opening position of a limit groove on the precast slab, and supporting two ends of the precast slab by using a supporting frame;
step 2, pouring high-strength self-leveling mortar into the porous flexible block and the connecting through hole;
step 3, fixedly connecting the precast beam with the precast slab by utilizing angle steel and expansion screws;
and 4, after the connection of the precast beam and the precast slab is finished, removing the supporting frame.
By adopting the technical scheme, according to the construction method, the prefabricated plate is placed firstly, and the prefabricated plate can be hung from top to bottom because the limiting block is a porous flexible block, so that the middle part of the prefabricated plate is just positioned in the frame plate groove; after the precast slab is placed, the porous flexible block is filled in the limit groove, then high-strength self-leveling mortar is filled, the high-strength self-leveling mortar can enter the connecting through holes through the porous flexible block and flow out of the porous flexible block, and the precast beam and the precast slab are connected into a whole by the high-strength self-leveling mortar; the earthquake-resistant performance of the building structure is poor.
Optionally, step 3 further comprises a step of implanting reinforcing steel bars into the connection part of the precast beam and the precast slab.
By adopting the technical scheme, the step of implanting the reinforcing steel bars is added, so that the precast beam and the precast slab are further fixed in the vertical direction.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the prefabricated plate is connected with the prefabricated beam in a connecting mode, so that the middle of the prefabricated plate is positioned at the top of the prefabricated beam, and compared with a traditional connecting structure of the prefabricated plate and the prefabricated beam, the connecting stability of the prefabricated plate and the prefabricated beam is higher; the prefabricated plate and the prefabricated beam are limited by the limiting blocks and the limiting grooves, so that the connection stability of the prefabricated plate and the prefabricated beam is further improved, and the earthquake resistance of the building structure is poor;
2. the porous flexible block is arranged, so that a constructor can adopt a hanging method from top to bottom when the precast slab is placed on the precast beam, and the porous flexible block is made of a deformable material and does not influence the construction process of placing the precast slab in a frame plate groove; after the porous flexible block is embedded into the limit groove, filling high-strength self-leveling mortar to enhance the hardness of the limit block, and tightly connecting the precast beam and the precast slab into a whole to enhance the connection strength of the precast beam and the precast slab;
3. the connection through holes are formed, so that when constructors fill the high-strength self-leveling mortar, the high-strength self-leveling mortar can flow into the connection through holes, and the high-strength self-leveling mortar flows into the precast beam to connect the precast beam and the precast slab into a whole.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present application;
FIG. 2 is a schematic diagram of an exploded structure intended to illustrate the present application;
FIG. 3 is a schematic view intended to show the structure of a precast beam;
fig. 4 is a schematic view intended to show the structure of a prefabricated panel.
Reference numerals illustrate: 1. prefabricating a beam; 11. a shelf plate groove; 111. a transverse fixing groove; 112. a longitudinal fixing groove; 12. a connecting through hole; 2. a prefabricated plate; 21. a limit groove; 3. a limiting block; 31. a porous flexible block; 32. high-strength self-leveling mortar; 4. a fixed bar group; 41. a transverse fixing strip; 42. a longitudinal fixing strip; 5. reinforcing steel bars; 6. angle steel.
Detailed Description
The application is described in further detail below with reference to fig. 1-4.
The embodiment of the application discloses a node of a precast beam and a precast slab. Referring to fig. 1, a node of a precast beam 1 and a precast slab 2 includes a precast beam 1, a precast slab 2 and a reinforcing steel bar 5, and the middle part of the precast slab 2 is placed at the top end of the precast beam 1 and fixedly connected with the precast beam 1; the steel bars 5 are vertically inserted into the precast slabs 2 and the precast beams 1 and fixedly connected with the precast slabs 2 and the precast beams 1.
Referring to fig. 2 and 3, the precast beam 1 is a beam body perpendicular to the ground, the precast beam 1 may be a cuboid or a cylinder, the precast beam 1 in this embodiment is a cuboid, the top surface of the precast beam 1 is provided with a frame plate groove 11, and the frame plate groove 11 penetrates through two sides of the precast beam 1; the inner wall of the frame plate groove 11 is uniformly provided with a plurality of connecting through holes 12, the connecting through holes 12 are arc-shaped, and two ends of the connecting through holes 12 are open.
Referring to fig. 3, two sides of the inner wall of the frame plate groove 11 are provided with limiting blocks 3, each limiting block 3 comprises a porous flexible block 31 and high-strength self-leveling mortar 32, the porous flexible block 31 in the embodiment is made of porous fiber sponge, the porous flexible block 31 is in a strip shape, the longitudinal sections of the porous flexible block 31 can be in shapes with different areas on two sides such as triangle, trapezoid, semicircle and the like, the longitudinal sections of the porous flexible block 31 in the embodiment are trapezoid, the porous flexible blocks 31 are multiple, the porous flexible blocks 31 are closely arranged on the inner wall of the frame plate groove 11, and the porous flexible blocks 31 are fixed on the inner wall of the frame plate groove 11 by countersunk screws; the high-strength self-leveling mortar 32 is filled in the porous flexible block 31 and the connecting through holes 12.
Referring to fig. 3, a horizontal fixing groove 111 and a vertical fixing groove 112 are formed on the bottom surface of the frame plate groove 11, the horizontal fixing groove 111 may be in a triangular prism shape, a trapezoidal prism shape or a semi-cylindrical shape, and the horizontal fixing groove 111 in this embodiment is in a triangular prism shape; the longitudinal fixing groove 112 may be triangular prism, trapezoidal prism or semi-cylindrical, and the longitudinal fixing groove 112 of this embodiment is triangular prism; the number of the horizontal fixing grooves 111 and the number of the vertical fixing grooves 112 may be plural, in this embodiment, the number of the horizontal fixing grooves 111 is plural, the number of the vertical fixing grooves 112 is plural, one horizontal fixing groove 111 is located at one side of the vertical fixing groove 112, and the other horizontal fixing groove 111 is located at the other side of the vertical fixing groove 112.
Referring to fig. 3 and 4, the prefabricated plate 2 is a rectangular plate or cuboid, in this embodiment, the cuboid is provided with limiting grooves 21 on two sides of the middle of the prefabricated plate 2, and the porous flexible blocks 31 are filled in the limiting grooves 21; the bottom surface in the middle of the precast slab 2 is provided with a fixing strip group 4, the fixing strip group 4 comprises a transverse fixing strip 41 and a longitudinal fixing strip 42, the transverse fixing strip 41 can be in a triangular prism shape, a trapezoid column shape or a semi-cylinder shape, and the transverse fixing strip 41 in the embodiment is in the triangular prism shape; the longitudinal fixing strips 42 may be triangular prism, trapezoidal prism or semi-cylindrical, and the longitudinal fixing strips 42 of the present embodiment are triangular prism; the number of the transverse fixing strips 41 and the number of the longitudinal fixing strips 42 can be two in this embodiment, the number of the longitudinal fixing strips 42 is multiple in an equidistant way, one transverse fixing strip 41 is located on one side of the longitudinal fixing strip 42, the other transverse fixing strip 41 is located on the other side of the longitudinal fixing strip 42, and the transverse fixing strips 41 and the longitudinal fixing strips 42 are integrally formed with the prefabricated plate 2.
Referring to fig. 2, a plurality of reinforcing bars 5 may be provided, four reinforcing bars 5 of this embodiment are provided, and the reinforcing bars 5 are implanted into the precast slab 2 and the precast beam 1 by a chemical reinforcement implantation method.
A construction method of a node of a precast beam 1 and a precast slab 2 comprises the following steps:
step 1, according to the opening position of a limit groove 21 on a precast slab 2, placing the precast slab 2 on a frame plate groove 11 by using a tower crane, so that a transverse fixing strip 41 is just positioned in a transverse fixing groove 111, a longitudinal fixing strip 42 is just positioned in a longitudinal fixing groove 112, and supporting two ends of the precast slab 2 by using a supporting frame;
step 2, after the precast slab 2 is placed in the frame plate groove 11, the porous flexible block 31 is just positioned in the limit groove 21, and constructors pour the high-strength self-leveling mortar 32 into the porous flexible block 31 and the connecting through hole 12, and stand until the high-strength self-leveling mortar 32 is solidified;
step 3, arranging angle steel 6 at four positions of the intersection of the precast beam 1 and the precast slab 2, and fixedly connecting the precast beam 1 and the precast slab 2 by utilizing the angle steel 6 and expansion screws;
step 4, after the connection of the precast beam 1 and the precast slab 2 is finished, dismantling the supporting frame;
and 5, implanting reinforcing steel bars 5 into the connection part of the precast beam 1 and the precast slab 2 by adopting a chemical reinforcement implantation method, and finishing the connection of the precast beam 1 and the precast slab 2.
The implementation principle of the node of the precast beam 1 and the precast slab 2 and the construction method thereof in the embodiment of the application is as follows: according to the opening position of the limit groove 21, the middle part of the precast slab 2 is just placed in the frame plate groove 11; after the porous flexible block 31 is completely embedded into the limit groove 21, filling high-strength self-leveling mortar 32 into the porous flexible block 31, enabling the high-strength self-leveling mortar 32 to flow into the connecting through holes 12 and the surface of the precast slab 2, connecting the precast slab 2 and the precast beam 1 into a whole, and after the high-strength self-leveling mortar 32 is condensed; further adopting angle steel 6 and expansion bolts to fix the precast slab 2 and the precast beam 1; and finally, adopting chemical bar planting to stably connect the precast slab 2 and the precast beam 1 together.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (5)
1. A node of precast beam and precast slab, its characterized in that: the prefabricated plate comprises a prefabricated beam (1) and a prefabricated plate (2), wherein a frame plate groove (11) is formed in the top of the prefabricated beam (1), limiting blocks (3) are fixedly connected to two side walls of the frame plate groove (11), limiting grooves (21) are formed in two sides of the middle of the prefabricated plate (2), the middle of the prefabricated plate (2) is connected with the inner wall of the frame plate groove (11), the prefabricated plate (2) is erected on the prefabricated beam (1), and connecting through holes (12) are uniformly formed in the side walls of the frame plate groove (11);
the limiting block (3) comprises a porous flexible block (31) and high-strength self-leveling mortar (32), the porous flexible block (31) is fixedly connected with the side wall of the frame plate groove (11), and the high-strength self-leveling mortar (32) is filled in the porous flexible block (31);
the bottom surface of the precast slab (2) is connected with a fixing strip group (4), the fixing strip group (4) comprises a transverse fixing strip (41) and a longitudinal fixing strip (42), a transverse fixing groove (111) and a longitudinal fixing groove (112) are formed in the bottom surface of the frame plate groove (11), the transverse fixing strip (41) is positioned in the transverse fixing groove (111), and the longitudinal fixing strip (42) is positioned in the longitudinal fixing groove (112);
the long side direction of the transverse fixing strips (41) is perpendicular to the long side direction of the longitudinal fixing strips (42), the transverse fixing strips (41) are arranged into two groups, the longitudinal fixing strips (42) are arranged into one group, one group of transverse fixing strips (41) are located on one side of the longitudinal fixing strips (42), and the other group of transverse fixing strips (41) are located on the other side of the longitudinal fixing strips (42).
2. A precast beam and precast slab node as defined in claim 1, wherein: the connecting through holes (12) are arc-shaped holes.
3. A precast beam and precast slab node as defined in claim 1, wherein: and reinforcing steel bars (5) are inserted into the precast slab (2) and the precast beam (1).
4. A method of constructing a joint between a precast beam (1) and a precast slab (2) as defined in claim 1, characterized by: the method comprises the following steps:
step 1, according to the position of a limit groove (21) on a precast slab (2), placing the precast slab (2) on the precast beam (1), and supporting two ends of the precast slab (2) by using a supporting frame;
step 2, pouring mortar into the porous flexible block (31) and the connecting through holes (12);
step 3, fixedly connecting the precast beam (1) with the precast slab (2) by utilizing the angle steel (6) and the expansion screw;
and 4, after the connection of the precast beam (1) and the precast slab (2) is finished, removing the support frame.
5. The construction method of the node of the precast beam (1) and the precast slab (2) according to claim 4, characterized in that: and step 3, the method further comprises the step of implanting reinforcing steel bars (5) into the connecting part of the precast beam (1) and the precast slab (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210782229.XA CN115233812B (en) | 2022-07-05 | 2022-07-05 | Node of precast beam and precast slab and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210782229.XA CN115233812B (en) | 2022-07-05 | 2022-07-05 | Node of precast beam and precast slab and construction method thereof |
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| Publication Number | Publication Date |
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| CN115233812A CN115233812A (en) | 2022-10-25 |
| CN115233812B true CN115233812B (en) | 2023-12-05 |
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| CN102720303A (en) * | 2012-06-15 | 2012-10-10 | 吴方伯 | Concrete composite beam |
| CN105839846A (en) * | 2016-03-22 | 2016-08-10 | 哈尔滨工业大学 | Prefabricated reinforced concrete composite beam |
| CN213508949U (en) * | 2020-06-29 | 2021-06-22 | 中铁第一勘察设计院集团有限公司 | Assembled platform canopy beam column node connection structure |
| CN214169432U (en) * | 2020-10-23 | 2021-09-10 | 中铁第四勘察设计院集团有限公司 | Connecting assembly |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107165272B (en) * | 2017-06-22 | 2024-01-30 | 中国建筑股份有限公司 | Prestressed assembled concrete frame node connecting structure and construction method thereof |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE60230144D1 (en) * | 2002-10-03 | 2009-01-15 | Tartuntamarkkinointi Oy | Concealed console connection |
| CN102720303A (en) * | 2012-06-15 | 2012-10-10 | 吴方伯 | Concrete composite beam |
| CN105839846A (en) * | 2016-03-22 | 2016-08-10 | 哈尔滨工业大学 | Prefabricated reinforced concrete composite beam |
| CN213508949U (en) * | 2020-06-29 | 2021-06-22 | 中铁第一勘察设计院集团有限公司 | Assembled platform canopy beam column node connection structure |
| CN214169432U (en) * | 2020-10-23 | 2021-09-10 | 中铁第四勘察设计院集团有限公司 | Connecting assembly |
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| CN115233812A (en) | 2022-10-25 |
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