CN211285960U - Precast beam column board connected node - Google Patents

Abstract

The utility model provides a precast beam column plate connection node, which comprises at least one floor slab, wherein no rib is arranged on the periphery of the floor slab, and a plurality of notches are arranged at intervals along at least part of the edge of the floor slab; at least two superimposed columns; at least one superposed beam; the connecting body comprises a first connecting body, a second connecting body and a third connecting body, the first connecting body is used for lap joint between the superposed columns, the second connecting body is used for connection between the superposed beam and the floor slab, and the third connecting body is used for connection between the superposed beam and the superposed columns; concrete is poured at least in the cavity of the superposed column, the cavity enclosed by the U-shaped beam shell of the superposed beam, at least one part of the floor slab and the joint enclosed by the superposed column and the superposed beam, and the superposed column, the superposed beam and the floor slab are connected with the poured concrete through the connecting body. The lifting device can realize quick lifting in place and connection, and the integral performance of the node is excellent.

Description

A prefabricated beam-column-plate connection node

technical field

The present disclosure relates to the field of prefabricated buildings, in particular to a prefabricated beam-column-plate connection node.

Background technique

Prefabricated concrete structures can effectively save resources and energy, improve the efficiency of materials in building energy conservation and structural performance, reduce construction waste and adverse effects on the environment, and meet the requirements of building industrialization, residential industrialization and green buildings. In the prefabricated structure, the prefabricated concrete frame structure can be applied to large space buildings such as office buildings, schools, hospitals, etc., and is the most widely used structural form in construction engineering.

At present, there are many problems and difficulties in the frame structure system mainly based on solid prefabricated columns. The weight of solid column components leads to large tower crane models, difficult on-site hoisting, and inconvenient transportation. The connection process is invisible, and the connection quality is difficult to guarantee. At present, many factors lead to low efficiency of prefabricated buildings, long construction period, increased cost and difficult quality assurance.

In the invention patent application document titled "Frame Structure System" and the application number is 2018107382429, it is disclosed that the form of mechanical connection is adopted at the connection nodes of the hollow superimposed column. The connection process of this connection form is visible and the connection quality is controllable, but The precision of prefabricated components is high, and the on-site reinforcement cannot be accurately aligned, resulting in low frame production efficiency and on-site connection efficiency.

Utility model content

After many years of prefabricated building design, production and research and development, we have accumulated rich experience. On the basis of the superimposed concrete column and the superimposed frame structure system, we have developed a new type of prefabricated beam-column-slab connection. The center of the prefabricated part of the superimposed concrete column is a cavity, which is light in weight and convenient for transportation and on-site hoisting. The superimposed beam adopts U-shaped prefabricated components. The U-shaped prefabricated components are light in weight and can be used for large-span frames without the limitation of tower crane tonnage. The floor can be fully prefabricated or laminated. There are no ribs in the prefabricated part, and slots are set to place connecting steel bars. The components do not have ribs to facilitate production and facilitate on-site installation of components. The lap joint connection node can realize the quick connection of longitudinal steel bars after the superimposed column is hoisted in place on site, without longitudinal reinforcement connection body, the quality of steel bar connection is easy to control, and the connection performance is excellent, which solves the main technical defects of the current prefabricated solid prefabricated frame columns.

In order to solve at least one of the above technical problems, the present disclosure provides a prefabricated beam-column-slab connection node and a construction method thereof.

According to one aspect of the present disclosure, a prefabricated beam-column-slab connection node includes: at least one floor slab, no ribs on the periphery of the floor slab, and a plurality of notches spaced along at least part of the edge of the floor slab; at least two overlapping a column, each superposed column includes a column shell, a cavity enclosed by the column shell, and a column reinforcement cage, the column reinforcement cage is at least partially embedded in the column shell; at least one superimposed beam, the superimposed beam includes U-shaped beam shell and beam reinforcement cage, the beam reinforcement cage is at least partially embedded in the U-shaped beam shell, and the two ends of the superimposed beam are free from reinforcement; and a connecting body, including a first connection body, a second connecting body and a third connecting body, the first connecting body is used for the lap connection between the stacked columns, and the second connecting body is used for the connection between the stacked beams and the floor slab The third connecting body is used for the connection between the superimposed beam and the superimposed column; the concrete is at least poured in the cavity of the superimposed column and the U-shaped beam shell of the superimposed beam is enclosed by The cavity, at least a part of the floor slab, and the joint enclosed by the superimposed column and the superimposed beam, the superposed column, the superposed beam and the floor slab are connected by the connecting body and the poured concrete.

According to at least one embodiment of the present disclosure, the two stacked columns are arranged in a vertical direction, one end of the first connecting body is arranged in a cavity of one stacked column, and the other end of the first connecting body penetrates through the cavity. The joint part enclosed by the superimposed column and the superimposed beam extends into the cavity of another superimposed column.

According to at least one embodiment of the present disclosure, the adjacent ends of the two superimposed columns are free of ribs, and the first connecting body is an overlapping steel cage.

According to at least one embodiment of the present disclosure, a plurality of notches are spaced along at least part of the edge of the floor slab, one end of the second connecting body is disposed in the notches, and the other end of the second connecting body extends into the stack The predetermined length of the composite beam.

According to at least one embodiment of the present disclosure, the beam reinforcement cage includes a plurality of beam stirrup mesh sheets spaced along the longitudinal direction of the superimposed beam and beam longitudinal bars connected to the plurality of beam stirrup mesh sheets; The beam longitudinal reinforcement includes a first beam longitudinal reinforcement embedded in the U-shaped beam shell, and a second beam longitudinal reinforcement disposed at the bottom of the U-shaped beam shell cavity and the top of the beam stirrup mesh sheet, and the first beam longitudinal reinforcement is provided. Two-beam longitudinal bars extend into a predetermined length of the superimposed column or pass through the joint portion enclosed by the superimposed column and the superimposed beam, and the third connecting body is the second beam longitudinal reinforcement.

According to at least one embodiment of the present disclosure, the groove extends from one end face of the cylindrical casing to the first predetermined position of the cylindrical casing or the other end face of the cylindrical casing along the length direction of the cylindrical casing.

According to at least one embodiment of the present disclosure, when both ends of the column longitudinal rib do not protrude from the column casing, the inner surface of at least one end of the column casing is provided with a groove along the circumferential direction, and the groove extends from the column casing. The end surface of the column casing extends along the length direction of the column casing to a second preset position of the column casing.

According to at least one embodiment of the present disclosure, the cross-sectional shape of the superimposed column cavity includes one of a rectangle, a circle, a polygon, a rectangle with concavo-convex shape, a circle with concave-convex shape, or a polygon with concave-convex shape or more.

According to at least one embodiment of the present disclosure, the cross-sectional shape of the cylindrical shell of the superimposed column is one of a rectangle, a circle, or a polygon.

According to another aspect of the present disclosure, a construction method for the above-mentioned prefabricated beam-column-slab connection node is provided, which includes installing a superimposed column; installing a support for a superimposed beam and a floor; sequentially installing the superimposed beam and the floor on the support; installing Superimposed columns overlap reinforcement cages; install longitudinal reinforcement bars on the upper and lower parts of U-shaped beams; install floor reinforcement bars and set up formwork locally; pour concrete into the cavity of the superimposed column, the cavity enclosed by the U-shaped beam shell of the superimposed beam, and the floor slab At least a part of it and the joint part enclosed by the superimposed column and the superimposed beam.

According to at least one embodiment of the present disclosure, the above-mentioned steps of installing the superposed columns, superimposed beams and floor slabs, and pouring concrete are repeated once to construct the upper floor.

Description of drawings

The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure, are included to provide a further understanding of the disclosure, and are incorporated in and constitute the present specification part of the manual.

1 is a schematic cross-sectional front view of a prefabricated portion of a laminated column according to an embodiment of the present disclosure.

2 is a schematic top view of the structure of a prefabricated part of a stacked column according to an embodiment of the present disclosure.

3 is a schematic perspective view of a U-shaped beam structure according to the present disclosure.

4 is a schematic perspective view of a floor structure according to the present disclosure.

FIG. 5 is a schematic diagram of a hoisting stacked column according to the present disclosure.

FIG. 6 is a schematic diagram of installing a composite beam and a floor support according to the present disclosure.

7 is a schematic diagram of the installation of a laminated beam according to the present disclosure.

8 is a schematic diagram of an installation floor panel according to the present disclosure.

FIG. 9 is a schematic diagram of installing a superimposed column to overlap a reinforcement cage according to the present disclosure.

10 is a schematic diagram of installing a second beam longitudinal bar of a composite beam according to the present disclosure.

FIG. 11 is a schematic diagram of installing floor slab connecting steel bars and partial formwork according to the present disclosure.

12 is a schematic diagram of pouring concrete according to the present disclosure.

13 is a schematic diagram of installing an upper column according to the present disclosure.

14 is a schematic diagram of a floor support according to the present disclosure.

Reference signs: 1—column shell; 2—column cavity; 3—column stirrup mesh; 4—column longitudinal reinforcement; 5—U-shaped beam shell; 6—superimposed beam; 61—first beam longitudinal reinforcement; 62—the second beam longitudinal reinforcement; 7—beam stirrup mesh; 8—floor; 9—slot; 10—connecting steel bar; 11—lap joint reinforcement cage; 12—support.

Detailed ways

The present disclosure will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the related content, but not to limit the present disclosure. In addition, it should be noted that, for the convenience of description, only the parts related to the present disclosure are shown in the drawings.

It should be noted that the embodiments of the present disclosure and the features of the embodiments may be combined with each other unless there is conflict. The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

The new type of prefabricated beam-column-plate connection node, the center of the prefabricated part of the superimposed concrete column is a cavity, light weight, convenient for transportation and on-site hoisting, and there are no ribs at the upper and lower ends of the prefabricated column, which can simplify the component production mold, improve component production efficiency, and reduce component production. cost. The superimposed beam adopts U-shaped prefabricated components. The U-shaped prefabricated components are light in weight and can be used for large-span frames without the limitation of tower crane tonnage. The floor can be fully prefabricated or laminated. There are no ribs in the prefabricated part, and slots are set to place connecting steel bars. The components do not have ribs to facilitate production and facilitate on-site installation of components. The lap joint connection node can realize the quick connection of longitudinal steel bars after the superimposed column is hoisted in place on site, without longitudinal reinforcement connection body, the quality of steel bar connection is easy to control, and the connection performance is excellent, which solves the main technical defects of the current prefabricated solid prefabricated frame columns.

According to a first embodiment of the present disclosure, a prefabricated beam-column-slab connection node is provided, comprising: at least one floor slab, with no ribs on the periphery of the floor slab, and a plurality of notches spaced along at least part of the edge of the floor slab; at least two overlapping Column, each superposed column includes a column shell, a cavity enclosed by the column shell and a column reinforcement cage, the column reinforcement cage is at least partially embedded in the column shell; at least one superimposed beam, the superimposed beam includes a U-shaped beam shell and a beam Reinforcing cage, the beam reinforcement cage is at least partially embedded in the U-shaped beam shell, and the two ends of the superimposed beam are free from reinforcement; and a connecting body, including a first connecting body, a second connecting body and a third connecting body, The first connecting body is used for the overlap connection between the stacked columns, the second connecting body is used for the connection between the stacked beam and the floor slab, and the third connecting body is used for the connection between the stacked beam and the stacked column; Concrete is poured at least in the cavity of the superimposed column, the cavity enclosed by the U-shaped beam shell of the superimposed beam, at least a part of the floor slab, and the junction surrounded by the superimposed column and the superimposed beam. The composite beams and floor slabs are connected by connecting bodies and poured concrete. There are no ribs at the ends of the superimposed columns, superimposed beams and floor slabs, which will not cause mutual interference between prefabricated components during the construction process, which is more convenient for production, and there are no ribs at the upper and lower ends of the superimposed columns, which can simplify the components. Produce molds to improve component production efficiency and reduce component production costs. Optionally, neither ends of the column reinforcement cage of the superimposed column extend beyond the outer side of the column shell. The connection between the lower-layer composite column and the upper-layer composite column avoids the use of semi-grouting sleeves, straight-threaded sleeves, etc. for mechanical connection of steel bars, and the lap connection is adopted through the connecting body, which can quickly realize the connection of the stacked concrete columns. Quickly hoisting into place and connecting, the on-site construction is convenient and efficient, and the overall performance of the node is excellent. In addition, the connection between the superimposed beam and the superimposed column is also anchored to the superimposed column through the connecting body, and there are no ribs at the end of the superimposed beam, the component production cost is low, the production efficiency is high, and the on-site installation is convenient. The shell can provide a larger operating surface for the placement of reinforcement on the construction site and facilitate the installation of reinforcement. There are no ribs at the ends of the prefabricated floor slabs, which avoids the collision of hoisting steel bars, facilitates on-site installation, and improves the production efficiency of components. Optionally, a fully prefabricated floor slab is used to avoid the influence of the construction progress by the hardening strength of the concrete, and to improve the construction progress on site. The full prefabricated floor slab can continue the subsequent installation and construction without waiting for the cast-in-place concrete to reach the strength, and the speed is greatly accelerated. Optionally, the prefabricated floor slab adopts a superimposed floor slab, and each end of the prefabricated part does not have ribs. Due to the light weight of the components, it is convenient for transportation and on-site hoisting. The superimposed beam adopts U-shaped beam shell prefabricated components, which are light in weight and can be used for large-span frames without the limitation of tower crane tonnage. A part of the beam longitudinal reinforcement (for example, the first beam longitudinal reinforcement) of the beam reinforcement cage is buried in the U-shaped beam shell, and the other part of the beam longitudinal reinforcement (for example, the second beam longitudinal reinforcement) passes through the laminated beam and the laminated beam before the field casting. The joint part of the joint column becomes a part of the connecting body. After the superimposed beam, superimposed column, floor and connecting body are all installed in place, in the cavity enclosed by the above superimposed column, the U-shaped beam shell of the superimposed beam, the cavity enclosed by the superimposed column and the superimposed beam. After pouring concrete in the joint part and a part of the prefabricated floor slab, a prefabricated beam-column-slab connection node is formed.

Optionally, the two stacked columns are arranged in a vertical direction, one end of the first connecting body is arranged in the cavity of one stacked column, and the other end of the first connecting body penetrates the combination enclosed by the stacked column and the stacked beam. part and extend into the cavity of the other superposed column. When the reinforcement cages of the two adjacent columns at both ends of the two superimposed columns do not protrude from the column shell, the connecting body is an overlapping reinforcement cage, and the overlapping reinforcement cage is arranged in the cavity of a superimposed column, and the overlapping reinforcement cage The other end penetrates through the junction surrounded by the superimposed column and the superimposed beam and extends into another superimposed column. Since there are no reinforcements at both ends of the column reinforcement cage, the lapped reinforcement cage is installed on site to form the first connecting body. One end penetrates through the joint part enclosed by the superimposed column and the superimposed beam and extends into the cavity of the other superimposed column to form an overlap connection.

Optionally, several notches are arranged at intervals along at least part of the edge of the floor slab, and the notches are used to place the second connecting body, for example, the second connecting body is a connecting steel bar. For example, if the floor slab is rectangular, the four sides of the floor slab are provided with multiple notches at intervals according to actual needs. The direction of the notches is perpendicular to the side where they are located. ) and meet the requirements of the lap length of the second connecting body, one section of the connecting reinforcement is placed in the notch, and the other section of the connecting reinforcement is lapped in the beam reinforcement cage of the superimposed beam. Optionally, a part of the floor slab is provided with notches at intervals, and the arrangement of the connecting steel bars and the notches avoids the rib from the edge of the floor slab, and the production mold is simplified, which facilitates production and facilitates the on-site installation of the floor slab.

Wherein, the above-mentioned column reinforcement cage includes a plurality of column stirrup mesh sheets and column longitudinal bars fixedly connected with the plurality of column stirrup mesh sheets, and the plurality of column stirrup mesh sheets are arranged at intervals along the length direction of the superimposed column; At least one end does not protrude from the cylindrical shell. Fixed connection between multiple column stirrup mesh sheets and column longitudinal reinforcement, such as binding connection, welding connection, etc. The circumferential reinforcement of the column stirrup mesh sheet is embedded in the column shell, and both ends of the column longitudinal reinforcement do not protrude from the column. On the end face of the shell, all the longitudinal ribs of the column are embedded in the cylindrical shell or a part of the longitudinal ribs of the column is embedded in the cylindrical shell, and the other part is located in the cavity enclosed by the cylindrical shell. The above-mentioned column longitudinal ribs do not have ribs at both ends, which can simplify the component production mold, improve the component production efficiency, and reduce the component production cost.

The beam reinforcement cage includes a plurality of beam stirrup mesh sheets and beam longitudinal bars fixedly connected with the multiple beam stirrup mesh sheets, and the plurality of beam stirrup mesh sheets are arranged at intervals along the length direction of the superimposed beam; Fixed connection with the beam longitudinal reinforcement, such as binding connection, welding connection, etc., a part of the beam stirrup mesh is embedded in the U-shaped beam shell, and the other part extends out of the open end of the U-shaped beam shell to form a part of the connecting body . The beam longitudinal reinforcement is divided into two parts, including the first beam longitudinal reinforcement embedded in the U-shaped beam shell, and the second beam longitudinal reinforcement. The second beam longitudinal reinforcement is arranged at the bottom of the U-shaped beam shell cavity and the beam stirrup net the top of the sheet, and the second beam longitudinal rib penetrates the joint part enclosed by the superimposed column and the superimposed beam, and the third connecting body can be the second beam longitudinal rib. The first beam longitudinal bars are all embedded in the U-shaped beam shell, that is, the prefabricated part of the composite beam, and the first beam longitudinal bars do not protrude from both ends of the U-shaped beam shell, which is convenient for production and installation. The second beam longitudinal bar is not prefabricated in the composite beam, but the second beam longitudinal bar is installed before the field casting to ensure the mutual interference of the steel bars during the hoisting process of the composite beam. For example, a part of the second beam longitudinal bar is placed on the U-shaped beam. At the bottom of the shell cavity, the other part of the second beam longitudinal reinforcement extends through the beam stirrup mesh to the top of the open end of the U-shaped beam shell and is fixedly connected with the beam stirrup mesh, such as by binding connection, welding connection Wait. One end of the second beam longitudinal rib penetrates the joint portion enclosed by the superimposed column and the superimposed beam to become a part of the connecting body, and is used for the connection between the superimposed beam and the superimposed column and between the superimposed beams. Optionally, the beam reinforcement cage further includes beam waist bars and beam tie bars, wherein the beam waist bars and beam tie bars are set according to specific conditions or may not be set.

Optionally, the inner surface of the cylindrical shell on one side of the cavity is provided with several grooves at intervals along the circumferential direction. It is located at one or both ends of the column shell and does not run through the entire length of the column shell. Connectors, such as connecting bars, etc., can be placed in the grooves. The upper and lower prefabricated stacked columns are lapped by placing connecting bars in the cavity. Connection, the concave-convex form of the inner cavity of the prefabricated superimposed column reduces the distance between the overlapping steel bars, and will not cause the weakening of the cross-section of the components. The construction and positioning of the steel bars on site are simple, the connection process is visible, and the quality is easy to control and detect, ensuring the superposition Effective transmission of forces within the column. Optionally, the groove extends from one end face of the column casing to the other end face of the column casing along the length direction of the column casing, and the groove penetrates the column casing throughout the entire length of the column casing. The concavity and convexity of the inner cavity boundary at the end of the prefabricated superimposed column increases the interface area of the new and old concrete, which can make the concrete poured on site form a good occlusion with the prefabricated components, and the integrity of the superimposed components is strong. The weight of the component is convenient for on-site hoisting, and the performance of the component is better than that of the traditional solid prefabricated column.

Optionally, both ends of the column longitudinal ribs do not protrude from the column shell, and the inner surface of one end of the column shell is provided with grooves along the circumferential direction. For variable cross-section cavities, the thickness of the column shell can vary along the length of the column. Optionally, grooves are provided on the inner surfaces of both ends of the cylindrical shell along the circumferential direction. The above-mentioned groove extends from the end face of the column casing to the second preset position of the column casing (for example, the middle position of the column casing) from the end face of the column casing. The section can be simplified or free of formwork, and the formwork of the end section is easy to disassemble and assemble, the production cost of components is reduced, and the production efficiency is improved.

Optionally, the cross-sectional shape of the superimposed column cavity includes, but is not limited to, one or more of a rectangle, a circle, a polygon, a rectangle with concavo-convex shape, a circle with concave-convex shape, or a polygon with concave-convex shape.

Optionally, the cross-sectional shape of the cylindrical shell of the superimposed column is one of a rectangle, a circle or a polygon.

According to another embodiment of the present disclosure, a construction method for a prefabricated beam-column-slab connection node is provided, comprising: installing a superposed column; installing a support for the superimposed beam and a floor; sequentially installing the superimposed beam and the floor on the support; Install the connecting body and set the formwork locally; pour concrete into the cavity of the superimposed column, the cavity enclosed by the U-shaped beam shell of the superimposed beam, at least a part of the floor slab, and the joint enclosed by the superimposed column and the superimposed beam middle. Optionally, the floor slab is a fully prefabricated floor slab, which requires pouring of notches in the floor slab. Optionally, the floor slab is a laminated floor slab, and it is necessary to cast the slot on the floor slab and the cavity or the part to be casted of the floor slab. Optionally, in addition to the vertical support at the bottom of the floor slab, the lower part of the floor slab may not be provided with support during construction, and a support member that can be adjusted to support the floor slab on the side of the beam, for example, the support member is an angle steel, directly on the support, such as Support floor slabs such as angle steel are arranged on the walls or superimposed beams, so that the installation of vertical supports can be eliminated and the construction efficiency can be improved.

Optionally, installing the connecting body includes installing the overlapping reinforcement cage into the superimposed column; installing the second beam longitudinal reinforcement of the superimposed beam and the connecting reinforcement of the floor slot, and the like.

Optionally, before the concrete is poured, a partial support formwork is also required at the junction of the composite beam and the composite column.

Optionally, after the concrete is poured, the construction of this layer is completed after the concrete reaches a certain strength, and the above installation sequence is repeated to construct the prefabricated components of the upper layer.

The prefabricated beam-column-slab connection node and its construction method provided by the present disclosure:

1) The overlapped connection of the superimposed column avoids the use of semi-grouting sleeves, straight thread sleeves and other methods for mechanical connection of steel bars on site, which can quickly realize the rapid hoisting and connection of the superimposed concrete columns, and the on-site construction is convenient and efficient. Excellent overall performance;

2) The longitudinal bars of the upper and lower layers of the superimposed column are connected in a lap joint, the connection process of the longitudinal bars is visible, the quality is easy to control and detect, and the effective transmission of the superimposed column force is ensured.

3) The upper and lower prefabricated hollow columns are connected by placing connecting steel bars in the cavity. The concave and convex form of the inner cavity of the prefabricated superimposed column reduces the distance between the overlapping steel bars, which will not cause the weakening of the component section, and the on-site steel bar construction and positioning is simple. , the connection process is visible, the quality is easy to control and detect, and the effective transmission of the internal force of the superimposed column is guaranteed.

4) The concavity and convexity of the inner cavity boundary at the end of the prefabricated composite column increases the interface area of the new and old concrete, which can make the concrete poured on site form a good occlusion with the prefabricated components, the integrity of the composite components is strong, and the prefabricated hollow column can effectively reduce The weight of prefabricated components is convenient for on-site hoisting, and the performance of components is better than that of traditional solid prefabricated columns.

5) The improved superimposed column at the end of the column can realize no simplification or no template in the middle section of the column, and the template at the end section is easy to disassemble, reduce the production cost of components, and improve the production efficiency.

6) U-shaped superimposed beams reduce the weight of components, facilitate hoisting, no ribs at the ends of components, low production costs, high production efficiency, and convenient on-site installation. The U-shaped beam shell can provide a larger operating surface for the placement of steel bars on the construction site, which is convenient for the installation of steel bars.

7) There are no ribs at the ends of the prefabricated floor slabs, which avoids the collision of the hoisting steel bars, facilitates on-site installation, and improves the production efficiency of components. The use of fully prefabricated floor slabs avoids the influence of the construction progress by the hardening strength of the concrete and improves the construction progress on site. The full prefabricated floor slab can continue the subsequent installation and construction without waiting for the cast-in-place concrete to reach the strength, and the speed is greatly accelerated.

The above-mentioned prefabricated beam-column-plate connection nodes will be described in detail below with reference to specific embodiments.

The present disclosure provides a prefabricated beam-column-slab connection node, comprising: at least one floor slab, with no ribs on the periphery of the floor slab, and a plurality of notches spaced along at least part of the edge of the floor slab; at least two superimposed columns, each superimposed column It includes a column shell, a cavity enclosed by the column shell and a column reinforcement cage, and the column reinforcement cage is at least partially embedded in the column shell; at least one superimposed beam, the superimposed beam includes a U-shaped beam shell and a beam reinforcement cage, and the beam reinforcement cage at least Parts are embedded in the U-shaped beam shell, and the two ends of the laminated beam are free of ribs; and the connecting body includes a first connecting body, a second connecting body and a third connecting body, and the first connecting body is used for stacking. The lap connection between the composite columns, the second connector is used for the connection between the composite beam and the floor slab, and the third connector is used for the connection between the composite beam and the composite column; the concrete is poured at least in the composite beam. The cavity of the column, the cavity enclosed by the U-shaped beam shell of the superimposed beam, at least a part of the floor slab, and the joint enclosed by the superimposed column and the superimposed beam, the superimposed column, the superimposed beam and the floor slab pass through the connecting body Connect to the poured concrete. There are no ribs at both ends of the superimposed column, and the above structure will be described below.

As shown in Figures 10 to 13, the prefabricated beam-column-slab connection node may include: at least one floor slab 8, at least two superimposed columns, at least one superimposed beam and a connecting body, wherein Figure 10 shows the installation of a third connecting body ( The three-dimensional schematic diagram of the superimposed beam after the second beam longitudinal reinforcement).

As shown in Figures 1a, 1b, Figures 2a to 2d and Figure 5, the column reinforcement cage includes a plurality of column stirrup mesh sheets 3 and column longitudinal bars 4, and the plurality of column stirrup mesh sheets 3 are arranged at intervals along the length direction of the superimposed column , a plurality of column stirrup mesh sheets 3 and the column longitudinal reinforcement 4 are fixedly connected, such as binding connection, welding connection, etc., the circumferential reinforcement of the column stirrup mesh sheet 3 is embedded in the column shell 1, and the two sides of the column longitudinal reinforcement 4 are The ends do not protrude from the end face of the cylindrical shell. All the column longitudinal ribs 4 are embedded in the column shell or a part of the column longitudinal ribs 4 is embedded in the column shell 1 , and the other part is located in the cavity 2 enclosed by the column shell. The above-mentioned column longitudinal ribs do not have ribs at both ends, which can simplify the component production mold, improve the component production efficiency, and reduce the component production cost.

As shown in Fig. 3 and Fig. 10 , the superimposed beam includes a U-shaped beam shell 5 and a beam reinforcement cage, the beam reinforcement cage is at least partially embedded in the U-shaped beam shell 5, and the two ends of the superimposed beam have no reinforcement. , easy to hoist, the beam reinforcement cage includes a plurality of beam stirrup mesh sheets 7 and beam longitudinal bars fixedly connected with a plurality of beam stirrup mesh sheets 7, and the multiple beam stirrup mesh sheets 7 are arranged at intervals along the length direction of the superimposed beam; A plurality of beam stirrup mesh sheets 7 are fixedly connected with the beam longitudinal reinforcement, such as binding connection, welding connection, etc., a part of the beam stirrup mesh sheet 7 is embedded in the U-shaped beam shell, and the other part extends out of the U-shaped beam shell. The open end is used to form part of the connector. The beam longitudinal reinforcement includes a first beam longitudinal reinforcement 61 and a second beam longitudinal reinforcement 62 (third connecting body), the first beam longitudinal reinforcement 61 is embedded in the U-shaped beam shell and prefabricated, and the second beam longitudinal reinforcement 62 is arranged in the U-shaped beam shell. The bottom of the cavity of the U-shaped beam shell 5 and the top of the beam stirrup mesh 7, and the second beam longitudinal reinforcement 62 penetrates or is anchored (after concrete is poured) at the joint surrounded by the superimposed column and the superimposed beam. The first beam longitudinal bars 61 do not protrude from both ends of the U-shaped beam shell 5, which is convenient for production and installation. The second beam longitudinal reinforcement 62 is not prefabricated in the composite beam, but the second beam longitudinal reinforcement 62 is installed before the field casting to ensure the mutual interference of the reinforcement during the hoisting process of the composite beam. For example, a part of the second beam longitudinal reinforcement 62 is placed in the At the bottom of the cavity of the U-shaped beam shell, another part of the second beam longitudinal reinforcement 62 passes through the beam stirrup mesh 7 and extends out of the top of the open end of the U-shaped beam shell 5 and is fixedly connected with the beam stirrup mesh 7. For example, by binding connections, welding connections, etc. One end of the second beam longitudinal reinforcement 62 penetrates or is anchored (after the concrete is poured) to the junction surrounded by the superimposed column and the superimposed beam to become a part of the connecting body, which is used for the superimposed beam and the superimposed column, Lap connections between composite beams. Optionally, the beam reinforcement cage further includes beam waist bars and beam tie bars, wherein the beam waist bars and beam tie bars are set according to specific conditions or may not be set.

As shown in FIG. 4 , the floor 8 is a fully prefabricated floor, and there are no ribs around the floor 8, for example, no ribs at the ends, which will not cause mutual interference between prefabricated components during construction, thereby facilitating production. A plurality of notches 9 are arranged at intervals along the edge part of the floor slab. The notches 9 are used to place the connecting body. The direction of the notching 9 is perpendicular to the side where it is located. At this time, the connecting body in the slot 9 is the connecting steel bar 10, a section of the connecting steel bar 10 is placed in the slot 9, and the other section of the connecting steel bar 10 is overlapped in the beam reinforcement cage of the superimposed beam. The setting of the connecting steel bar and the notch avoids the rib from the edge of the floor slab, and the production mold is simplified, which is convenient for production.

As shown in Figure 12, the concrete is poured in the cavity 2 of the superimposed column, the cavity enclosed by the U-shaped beam shell 5 of the superimposed beam, the junction surrounded by the superimposed column and the superimposed beam, and the notch of the floor slab 8 9 to form prefabricated beam-column-plate connection nodes. 12 is a schematic diagram of pouring concrete.

As shown in FIG. 9 , when both ends of the column longitudinal bars 4 do not protrude from the column shell 1, the first connecting body is the overlapped reinforcing bar cage 11, and the overlapped reinforcing bar cage 11 is set at the position of the overlapped column during the installation of the connecting body. In the cavity 2, one end of the overlapped reinforcement cage 11 penetrates the joint portion surrounded by the superimposed column and the superimposed beam and extends into the cavity of another superimposed column. For example, one end of the overlapped reinforcing bar cage 11 is placed in the cavity 2 of the lower laminated column, the other end of the overlapped reinforcing bar cage 11 is extended into the joint portion surrounded by the overlapped column and the overlapped beam, and the overlapped reinforcing bar cage is A part of 11 further extends into the cavity 2 of the upper-layer stacking column to form a connection body, and an overlap connection is formed between the upper-layer stacking column and the lower-layer stacking column.

As shown in Figure 1b and Figures 2b and 2d, the inner surface of the cylindrical shell 1 on one side of the cavity is provided with a plurality of grooves at intervals along the circumferential direction, and the inner surface of the cylindrical shell 1 forms a structure with alternating concavities and convexities. The groove is located at the end of the cylindrical shell 1, extending from one end face of the cylindrical shell 1 along the length direction of the cylindrical shell to a certain position of the cylindrical shell without running through the entire length of the cylindrical shell. A connecting body, such as connecting steel bars, can be placed in the groove part. The upper and lower prefabricated superimposed columns are connected by lap joints by placing connecting steel bars in the cavity. The concave-convex form of the inner cavity 2 of the superimposed column reduces the distance between the overlapping steel bars, does not cause the weakening of the cross-section of the components, and makes the construction and positioning of the steel bars on site simple. The groove extends from one end face of the column casing 1 to the other end face of the column casing 1 along the length direction of the column casing 1 , and the groove penetrates the entire column casing 1 in the entire length of the column casing 1 .

The end of the cylindrical shell 1 can also be provided with a groove along the circumferential direction on the inner surface, and the groove extends from the end surface of the cylindrical shell 1 along the length direction of the cylindrical shell 1 to the second preset position of the cylindrical shell (for example, the middle position of the cylindrical shell) The wall thickness of the end portion of the column shell 1 is smaller than the wall thickness of the middle portion, that is, the thickness of the column shell 1 can vary along the length of the column. Optionally, the ends of the two ends of the column shell 1 are respectively provided with the above-mentioned grooves, and the grooves are used to place the connecting body. The improved superimposed column at the column end and the middle section of the column can realize no simplification or no template.

2a to 2d are schematic top views of the stacked column, the cross-sectional shape of the stacked column cavity 2 includes but is not limited to a rectangle, a circle, a polygon, a rectangle with concave-convex shape, a circle with concave-convex shape, or a One or more of the convex and concave polygons. Optionally, the cross-sectional shape of the column shell 1 of the superimposed column is one of a rectangle, a circle or a polygon.

This embodiment also provides a construction method for a prefabricated beam-column-slab connection node, as shown in FIGS. 5 to 13 , including: installing a superimposed column (as shown in FIG. 5 ); As shown in Figure 6); install the superimposed beams and floor slabs on the support 12 in sequence (as shown in Figures 7 to 8); install the connecting body (as shown in Figure 8, install the overlapping steel cage 11 to the superimposed column, As shown in Figures 9 to 11, install the second beam longitudinal reinforcement 62 of the superimposed beam and the connecting reinforcement 10 of the floor slot 9); pour concrete into the cavity 2 of the superimposed column and the U-shaped beam shell 5 of the superimposed beam The enclosed cavity, at least a part of the floor slab 8 and the joint enclosed by the superimposed column and the superimposed beam. Optionally, the floor slab is a fully prefabricated floor slab, and the slot 9 on the floor slab needs to be poured. Optionally, the floor slab is a laminated floor slab, and it is necessary to cast the slot 9 on the floor slab and the cavity or the part to be casted of the floor slab. Among them, as shown in FIG. 14 , in the step of installing the support 12 of the superimposed beam and the floor slab, the support of the floor slab 8 may not be vertical support, or the support 12 may be directly arranged on the side of the superimposed beam 6, such as angle steel to support the floor slab The upper end face of the angle steel supports the floor 8, and the other end face of the angle steel is fixedly connected to the side of the superimposed beam 6 by bolts, so that the installation of vertical supports can be eliminated and the construction efficiency can be improved.

After the concrete reaches a certain strength, the construction of this layer is completed, and the above installation sequence is repeated to construct the prefabricated components of the upper layer.

In the description of this specification, references to the terms "one embodiment/mode", "some embodiments/modes", "example", "specific example", or "some examples", etc. are intended to be combined with the description of the embodiment/mode A particular feature, structure, material, or characteristic described by way of example or example is included in at least one embodiment/mode or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment/mode or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments/means or examples. Furthermore, those skilled in the art may combine and combine the different embodiments/modes or examples described in this specification and the features of the different embodiments/modes or examples without conflicting each other.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless expressly and specifically defined otherwise.

Those skilled in the art should understand that the above-mentioned embodiments are only for clearly illustrating the present disclosure, rather than limiting the scope of the present disclosure. For those skilled in the art, other changes or modifications may also be made on the basis of the above disclosure, and these changes or modifications are still within the scope of the present disclosure.

Claims (9)

1. A precast beam column plate connected node, comprising:

the periphery of the floor slab is not provided with ribs, and a plurality of notches are arranged at intervals along at least part of the edge of the floor slab;

the device comprises at least two superposed columns, a plurality of connecting rods and a plurality of connecting rods, wherein each superposed column comprises a column shell, a cavity surrounded by the column shell and a column reinforcement cage, and at least part of the column reinforcement cage is embedded in the column shell;

the composite beam comprises a U-shaped beam shell and a beam reinforcement cage, wherein at least part of the beam reinforcement cage is embedded in the U-shaped beam shell, and no rib is arranged at two end parts of the composite beam; and

the connector comprises a first connector, a second connector and a third connector, the first connector is used for lap joint between the superposed columns, the second connector is used for connection between the superposed beam and the floor slab, and the third connector is used for connection between the superposed beam and the superposed columns;

concrete is poured at least in the cavity of the superposed column, the cavity enclosed by the U-shaped beam shell of the superposed beam, at least one part of the floor slab and the joint enclosed by the superposed column and the superposed beam, and the superposed column, the superposed beam and the floor slab are connected with the poured concrete through the connecting body.

2. A precast beam-column-plate connection node according to claim 1, wherein the two superposed columns are arranged in a vertical direction, one end of the first connection body is disposed in a cavity of one of the superposed columns, and the other end of the first connection body penetrates through the joint portion defined by the superposed columns and the superposed beam and extends into a cavity of the other superposed column.

3. A precast beam column panel connection node according to claim 2,

the adjacent tip of two superposed columns does not have the muscle, first connector is overlap joint steel reinforcement cage.

4. A precast beam-column plate connection node as set forth in claim 1, wherein one end of the second connection body is disposed in the notch, and the other end of the second connection body extends into the superposed beam by a predetermined length.

5. A precast beam column panel connection node according to claim 1,

the beam reinforcement cage comprises a plurality of beam stirrup net sheets arranged at intervals along the length direction of the superposed beam and beam longitudinal reinforcements connected with the beam stirrup net sheets;

the beam longitudinal rib comprises a first beam longitudinal rib embedded in the U-shaped beam shell and a second beam longitudinal rib arranged at the bottom of the cavity of the U-shaped beam shell and at the top of the beam stirrup net piece, the second beam longitudinal rib extends into the preset length of the superposed column or penetrates through a joint part enclosed by the superposed column and the superposed beam, and the third connecting body is the second beam longitudinal rib.

6. A precast beam column panel connection node according to claim 1, wherein the column shell inner surface is provided with a plurality of grooves at intervals in a circumferential direction, the grooves extending from one end surface of the column shell to the first preset position of the column shell or the other end surface of the column shell in a length direction of the column shell.

7. A precast beam column panel connection node as defined in claim 1 wherein when neither end of the column reinforcement cage extends beyond the column casing, the inner surface of at least one end of the column casing is circumferentially grooved, the grooves extending from the end surface of the column casing in the direction of the length of the column casing to a second predetermined position of the column casing.

8. A precast beam column panel connection node as defined in claim 1, wherein the cross-sectional shape of the overlapping column cavity comprises one or more of a rectangle, a circle, a polygon, a rectangle with a concavo-convex shape, a circle with a concavo-convex shape, or a polygon with a concavo-convex shape.

9. A precast beam column panel connection node as defined in claim 8 wherein the shell cross-sectional shape of the composite column is one of rectangular, circular or polygonal.

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