CN211285960U

CN211285960U - Precast beam column board connected node

Info

Publication number: CN211285960U
Application number: CN201921907999.2U
Authority: CN
Inventors: 聂建国; 聂鑫; 张猛; 樊健生; 陈�光; 马云飞; 杨悦; 陈明
Original assignee: Tsinghua University; Sany Construction Technology Co Ltd
Current assignee: Tsinghua University; Sany Construction Technology Co Ltd
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2020-08-18
Anticipated expiration: 2029-11-07

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

Precast beam column board connected node

Technical Field

The utility model relates to an assembly type structure field especially relates to a precast beam column slab connected node.

Background

The prefabricated concrete structure can effectively save resources and energy, improve the efficiency of the material in the aspects of building energy conservation and structural performance, reduce building garbage and reduce adverse effects on the environment, and meets the requirements of building industrialization, housing industrialization and green buildings. In the fabricated structure, the fabricated concrete frame structure can be applied to large-space buildings such as office buildings, schools, hospitals and the like, and belongs to a structural form which is most widely applied in constructional engineering.

At present, a frame structure system mainly comprising solid prefabricated columns has a plurality of problems and difficulties, and solid column components have large models of tower cranes due to large dead weights, are difficult to hoist on site and are inconvenient to transport; the column longitudinal steel bars are mostly connected by the semi-grouting sleeve on site, the steel bars are difficult to connect, the connecting process is invisible, and the connecting quality is difficult to ensure. At present, the efficiency of the fabricated building is low due to a plurality of factors, the construction period is long, the cost is increased, and the quality is difficult to ensure.

The invention patent application document named as 'frame structure system' with application number 2018107382429 discloses that a mechanical connection mode is adopted at a connection node of a hollow superposed column, the connection process of the connection mode is visual, the connection quality is controllable, but the requirement on the precision of a prefabricated part is high, and the site reinforcing steel bar cannot be accurately aligned, so that the production efficiency of a framework and the site connection efficiency are low.

SUMMERY OF THE UTILITY MODEL

Through years of assembly type building design, production and research and development, abundant experience is accumulated. A novel prefabricated beam column plate connecting node is developed on the basis of a composite concrete column and a composite frame structure system. The center of the prefabricated part of the laminated concrete column is a cavity, the weight is light, the transportation and the on-site hoisting are convenient, no rib is arranged at the upper end and the lower end of the prefabricated column, a component production mold can be simplified, the component production efficiency is improved, and the component production cost is reduced. The superposed beam adopts a U-shaped prefabricated part, the U-shaped prefabricated part is light in weight, and can be used for a large-span frame without being limited by the tonnage of a tower crane, and the end part of the prefabricated part does not have ribs so as to be convenient for production. The floor slab can adopt a fully prefabricated floor slab or a composite floor slab, the prefabricated part does not have ribs, the notch is arranged for placing connecting steel bars, the components can be conveniently produced without ribs, and the components can be conveniently installed on site. The lap joint type connecting node can realize the quick connection of longitudinal steel bars after the on-site hoisting of the superposed column is in place, a longitudinal steel bar connecting body is avoided, the connection quality of the steel bars is easy to control, the connecting performance is superior, and the main technical defects of the existing assembled solid prefabricated frame column are overcome.

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

According to an aspect of the present disclosure, a precast beam-column plate connection node includes: 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; 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.

According to at least one embodiment of the present disclosure, the two superposed columns are arranged in a vertical direction, one end of the first connecting body is arranged in a cavity of one superposed column, and the other end of the first connecting body penetrates through a joint portion surrounded by the superposed columns and the superposed beams and extends into a cavity of the other superposed column.

According to at least one embodiment of this disclosure, the adjacent tip of two superposed columns does not have the muscle, first connector is overlap joint steel reinforcement cage.

According to at least one embodiment of the present disclosure, a plurality of notches are provided at intervals along at least a part of the edge of the floor slab, one end of the second connecting body is provided in the notch, and the other end of the second connecting body extends into the superposed beam by a predetermined length.

According to at least one embodiment of the present disclosure, the beam reinforcement cage includes a plurality of beam stirrup mesh sheets arranged at intervals along the length direction of the composite beam and beam longitudinal bars connected to the plurality of beam stirrup mesh 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.

According to at least one embodiment of the present disclosure, the groove extends 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 along the length direction of the column shell.

According to at least one embodiment of this disclosure, when the both ends of post longitudinal reinforcement do not all stretch out the column shell, the internal surface of the at least one end of column shell sets up the recess along circumference, the recess is followed column shell terminal surface is followed column shell length direction extends to column shell second preset position.

According to at least one embodiment of the present disclosure, the cross-sectional shape of the cavity of the superimposed cylinder includes 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.

According to at least one embodiment of the present disclosure, the cross-sectional shape of the column shell of the composite column is one of rectangular, circular or polygonal.

According to another aspect of the disclosure, a construction method of the prefabricated beam-column-plate connection node is provided, wherein a superposed column is installed; installing a support of the superposed beam and the floor; sequentially mounting the superposed beam and the floor slab on a support; installing a superposed column lap joint reinforcement cage; installing longitudinal steel bars at the upper and lower parts of the U-shaped beam; installing floor slab reinforcing steel bars and locally arranging templates; and pouring concrete into 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 combined part enclosed by the superposed column and the superposed beam.

According to at least one embodiment of the present disclosure, the steps of installing the composite columns, the composite beams and the floor slabs and pouring the concrete are repeated once to construct the upper layer.

Drawings

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

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

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

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

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

Figure 5 is a schematic view of a lifting composite column according to the present disclosure.

Figure 6 is a schematic view of a mounting composite beam, floor support according to the present disclosure.

Fig. 7 is a schematic view of a mounting composite beam according to the present disclosure.

Figure 8 is a schematic view of an installed floor according to the present disclosure.

Fig. 9 is a schematic view of a lap-joint reinforcement cage for mounting a laminated column according to the present disclosure.

Fig. 10 is a schematic view of a second beam longitudinal bar of an installed composite beam according to the present disclosure.

Figure 11 is a schematic view of a partial formwork mounting floor slab connecting rebar according to the present disclosure.

Fig. 12 is a schematic illustration of cast concrete according to the present disclosure.

Fig. 13 is a schematic view of an installed upper column according to the present disclosure.

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

Reference numerals: 1-column shell; 2-column cavity; 3-column stirrup net sheet; 4-column longitudinal ribs; 5-U-shaped beam shell; 6, overlapping the beam; 61-first beam longitudinal bar; 62-second beam longitudinal ribs; 7-beam stirrup net sheet; 8, forming a floor slab; 9-notch; 10, connecting steel bars; 11-overlapping the reinforcement cage; 12-supporting.

Detailed Description

The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Novel precast beam column slab connected node, coincide concrete column prefabricated part center are the cavity, and light in weight conveniently transports and on-the-spot hoist and mount, and the lower extreme does not go out the muscle on the precast column, can simplify component production mould, improves component production efficiency, reduces component manufacturing cost. The superposed beam adopts a U-shaped prefabricated part, the U-shaped prefabricated part is light in weight, and can be used for a large-span frame without being limited by the tonnage of a tower crane, and the end part of the prefabricated part does not have ribs so as to be convenient for production. The floor slab can adopt a fully prefabricated floor slab or a composite floor slab, the prefabricated part does not have ribs, the notch is arranged for placing connecting steel bars, the components can be conveniently produced without ribs, and the components can be conveniently installed on site. The lap joint type connecting node can realize the quick connection of longitudinal steel bars after the on-site hoisting of the superposed column is in place, a longitudinal steel bar connecting body is avoided, the connection quality of the steel bars is easy to control, the connecting performance is superior, and the main technical defects of the existing assembled solid prefabricated frame column are overcome.

According to a first embodiment of the present disclosure, there is provided a precast beam column plate connection node, including: 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; 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, at least part of the beam reinforcement cage is embedded in the U-shaped beam shell, and no rib is formed at two end parts of the composite 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 end parts of the superposed columns, the superposed beams and the floor slab do not have ribs, and mutual interference among prefabricated parts can not be caused in the construction process, so that the production is more convenient, the ribs are not arranged at the upper end and the lower end of the superposed columns, a component production mold can be simplified, the component production efficiency is improved, and the component production cost is reduced. Optionally, both ends of the column reinforcement cage of the superposed column do not extend outside the column shell. The connection between the lower laminated column and the upper laminated column avoids the mechanical connection of steel bars by adopting modes such as a semi-grouting sleeve and a straight thread sleeve, and the lap joint type connection is adopted through the connector, so that the rapid hoisting, in-place and connection of the laminated concrete column can be rapidly realized, the site construction is convenient and efficient, and the integral performance of the node is excellent. In addition, the connection between the superposed beam and the superposed column is anchored on the superposed column through the connector, no rib is arranged at the end part of the superposed beam, the production cost of the component is low, the production efficiency is high, the field installation is convenient, and meanwhile, the U-shaped beam shell can provide a larger operation surface for placing the reinforcing steel bars on the construction field, thereby facilitating the installation of the reinforcing steel bars. The prefabricated floor slab end does not have the muscle, avoids hoist and mount reinforcing bar collision, and convenient field installation improves component production efficiency simultaneously. Optionally, adopt full precast floor, avoid the construction progress to receive the influence of concrete hardening strength, improve the site operation progress. The fully-prefabricated floor slab can continue subsequent installation and construction without waiting for the strength of the cast-in-place concrete, and the speed is greatly increased. Optionally, the prefabricated floor slab is a laminated floor slab, ribs do not exist at each end of the prefabricated part, and transportation and field hoisting are facilitated due to light weight of the components. The superposed beam adopts a U-shaped beam shell prefabricated part, has light weight, can be used for a large-span frame and is not limited by the tonnage of a tower crane, and the end part of the prefabricated part does not have ribs so as to be convenient for production. One part of the longitudinal beam rib (for example, a first longitudinal beam rib) of the beam reinforcement cage is embedded in the U-shaped beam shell, and the other part of the longitudinal beam rib (for example, a second longitudinal beam rib) penetrates through the joint of the superposed beam and the superposed column to become one part of the connecting body before cast-in-place. And after the superposed beam, the superposed column, the floor slab and the connector are all installed in place, concrete is poured into a cavity of the superposed column, a cavity enclosed by a U-shaped beam shell of the superposed beam, a joint enclosed by the superposed column and the superposed beam and a part of the prefabricated floor slab to form the prefabricated beam-column-plate connecting node.

Optionally, the two superposed columns are arranged in a vertical direction, one end of the first connecting body is arranged in a cavity of one superposed column, and the other end of the first connecting body penetrates through a joint portion enclosed by the superposed columns and the superposed beam and extends into a cavity of the other superposed column. When two adjacent end post steel reinforcement cages of two superposed columns do not stretch out the column shell, the connector is the overlap joint steel reinforcement cage, the overlap joint steel reinforcement cage sets up in the cavity of a superposed column, and the other end of overlap joint steel reinforcement cage runs through the joint portion that is enclosed by superposed column and superposed beam and extends to in another superposed column. Because the both ends of post steel reinforcement cage do not all have the muscle, adopt on-the-spot installation overlap joint steel reinforcement cage to form first connecting body, for example, the one end of overlap joint steel reinforcement cage is placed in the cavity of lower range of superposed column, and the other end of overlap joint steel reinforcement cage runs through the joint portion that is enclosed by superposed column and superposed beam and forms the overlap joint formula and connect in extending to the cavity of another superposed column.

Optionally, a plurality of notches are provided at intervals along at least part of the edge of the floor slab, the notches being used for placing second connectors, for example, the second connectors are connecting bars. For example, the floor is the rectangle, and four edges of floor all set up a plurality of notches according to actual need interval, and the direction perpendicular to the limit at place of notch, the size of notch should conveniently put into second connector (for example connecting reinforcement etc.) and satisfy the requirement of second connector overlap joint length, and one section of connecting reinforcement is placed in the notch, and another section of connecting reinforcement then the overlap joint is in the beam reinforcement cage of superimposed beams. Optionally, notches are formed in one part of the edge of the floor at intervals, the arrangement of the connecting steel bars and the notches avoids ribs at the edge of the floor, a production die is simplified, production is facilitated, and the floor is convenient to install on site.

The column reinforcement cage comprises a plurality of column stirrup net sheets and column longitudinal reinforcements fixedly connected with the column stirrup net sheets, wherein the column stirrup net sheets are arranged at intervals along the length direction of the superposed column; at least one end of the column longitudinal bar does not extend out of the column shell. The column hooping net sheets and the column longitudinal bars are fixedly connected, for example, in a binding connection mode, a welding connection mode and the like, the circumferential reinforcing steel bars of the column hooping net sheets are embedded in the column shell, two ends of the column longitudinal bars do not extend out of the end face of the column shell, the column longitudinal bars are completely embedded in the column shell or one part of the column longitudinal bars are embedded in the column shell, and the other part of the column longitudinal bars is located in a cavity surrounded by the column shell. The two ends of the column longitudinal rib are not provided with ribs, so that a component production mold can be simplified, the component production efficiency is improved, and the component production cost is reduced.

The beam reinforcement cage comprises a plurality of beam stirrup net sheets and beam longitudinal reinforcements fixedly connected with the beam stirrup net sheets, and the beam stirrup net sheets are arranged at intervals along the length direction of the superposed beam; the beam stirrup net sheets are fixedly connected with the beam longitudinal bars, for example, in a binding connection mode, a welding connection mode and the like, one part of each beam stirrup net sheet is embedded in the U-shaped beam shell, and the other part of each beam stirrup net sheet extends out of the opening end of the U-shaped beam shell and is used for forming one part of the connecting body. The muscle is indulged to the roof beam divide into two parts, indulges the muscle including the first roof beam of burying underground in U type beam shell to and the muscle is indulged to the second roof beam, and the muscle is indulged to the second roof beam sets up in U type beam shell cavity bottom and roof beam stirrup net piece top, and the second roof beam is indulged the muscle and is run through the joint portion that is enclosed by superposed column and superposed beam, and the third connector can be for the second roof beam to indulge the muscle. The first beam longitudinal ribs are all embedded in the U-shaped beam shell, namely the prefabricated part of the superposed beam, and the first beam longitudinal ribs do not extend out of two ends of the U-shaped beam shell, so that the production and installation are convenient. The second beam longitudinal ribs are not prefabricated in the superposed beams, but the second beam longitudinal ribs are installed before cast-in-place to ensure mutual interference of the reinforcing steel bars in the hoisting process of the superposed beams, for example, one part of the second beam longitudinal ribs are placed at the bottom of the cavity of the U-shaped beam shell, and the other part of the second beam longitudinal ribs penetrates through the beam stirrup net piece to extend out of the top of the opening end of the U-shaped beam shell and is fixedly connected with the beam stirrup net piece together, for example, through binding connection, welding connection and the like. One end of the second beam longitudinal rib penetrates through a joint part enclosed by the superposed columns and the superposed beams to form a part of the connecting body, and is used for connecting the superposed beams with the superposed columns and between the superposed beams. Optionally, the beam reinforcement cage further comprises a beam waist rib and a beam tie bar, wherein the beam waist rib and the beam tie bar are arranged according to specific conditions, and may or may not be arranged.

Optionally, the internal surface that the column casing is located cavity one side sets up a plurality of recesses along circumference interval, for example, the recess extends to the first preset position of column casing along column casing length direction from a terminal surface of column casing, the recess is located one or two tip of column casing and does not link up whole column casing length, can place the connector at the recess part, for example, connecting reinforcement etc. upper and lower floor's prefabricated superposed column realizes the overlap joint formula through placing connecting reinforcement in the cavity and connects, the unsmooth form of prefabricated superposed column inner chamber has reduced the distance between the overlapping reinforcement, can not cause the component cross-section to weaken, on-the-spot reinforcing bar construction and location are simple, the joining process is visual, the quality is easily controlled and detects, the effective transmission of the internal force of superposed column has been guaranteed. Still optionally, the groove extends from one end face of the column shell to the other end face of the column shell in the length direction of the column shell, and the groove penetrates through the column shell over the entire length of the column shell. The boundary of the inner cavity at the end part of the prefabricated superposed column is concave-convex, so that the interface area of new and old concrete is increased, the cast-in-place concrete and the prefabricated component can form good occlusion, the integrity of the superposed component is strong, the weight of the prefabricated component can be effectively reduced by the prefabricated superposed column, the on-site hoisting is convenient, and the performance of the component is superior to that of the traditional solid prefabricated column.

Optionally, both ends of the column longitudinal rib do not extend out of the column casing, a groove is circumferentially arranged on the inner surface of one end of the column casing, for example, the wall thickness of the end part of the column casing is smaller than that of the middle part, that is, the cavity is a variable cross-section cavity, and the thickness of the column casing can be changed along the length direction of the column. Still optionally, the inner surfaces of both ends of the column casing are both provided with grooves in the circumferential direction. The groove extends to a second preset position (for example, the middle position of the column shell) of the column shell from the end face of the column shell along the length direction of the column shell, the groove is used for placing a connector, a superposed column with an improved column end can be used, a middle section of the column can be free of simplification or template, a template of the end section is convenient to disassemble and assemble, the production cost of a component is reduced, and the production efficiency is improved.

Optionally, the cross-sectional shape of the cavity of the superimposed cylinder includes, but is not limited to, 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.

Optionally, the cross-sectional shape of the shell of the laminated column is one of rectangular, circular or polygonal.

According to another embodiment of the present disclosure, there is provided a construction method of a precast beam-column plate connection node, including: mounting the superposed columns; installing a support of the superposed beam and the floor; sequentially mounting the superposed beam and the floor slab on a support; installing a connecting body, and locally arranging a template; and pouring concrete into 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 combined part enclosed by the superposed column and the superposed beam. Optionally, the floor slab is a fully prefabricated floor slab, and a notch on the floor slab needs to be poured. Optionally, the floor slab is a laminated floor slab, and the notch on the floor slab and the cavity or the part to be cast of the floor slab need to be cast. Optionally, the floor slab support may not be provided with a support at the lower part of the floor slab, except for the slab bottom vertical support, a support member capable of leveling and supporting the floor slab is provided at the side of the beam, for example, the support member is an angle steel, and the angle steel is directly provided on a support, for example, a wall or a composite beam, to support the floor slab, so that the installation of the vertical support can be eliminated, and the construction efficiency can be improved.

Optionally, the installing the connector comprises installing an overlapping reinforcement cage into the superposed column; and mounting the second beam longitudinal bar of the superposed beam, the connecting steel bar of the floor slab notch and the like.

Optionally, before pouring concrete, a partial formwork is also needed at the joint of the composite beam and the composite column.

Optionally, after the concrete is poured, the upper-layer prefabricated part is constructed after the concrete reaches a certain strength, and the installation sequence is repeated.

The invention provides a precast beam column plate connecting node and a construction method thereof, wherein the precast beam column plate connecting node comprises the following steps:

1) the overlapped columns are connected in an overlapping mode, the mechanical connection of reinforcing steel bars in the mode of adopting a semi-grouting sleeve, a straight thread sleeve and the like on site is avoided, the rapid hoisting, positioning and connection of the overlapped concrete columns can be rapidly realized, the site construction is convenient and efficient, and the integral performance of the nodes is excellent;

2) the upper-layer column and the lower-layer column of the laminated column are connected in a longitudinal rib lap joint mode, the longitudinal rib connection process is visual, the quality is easy to control and detect, and the effective transmission of the force of the laminated column is guaranteed.

3) The connection is realized through placing connecting reinforcement in the cavity to the hollow column of upper and lower floor's prefabricated hollow column, and the unsmooth form of prefabricated superposed column inner chamber has reduced the distance between the overlap joint reinforcing bar, can not cause the member cross-section to weaken, and on-the-spot steel bar construction and location are simple, and the connection process is visual, and the effective transmission of the interior power of superposed column has been guaranteed to easy control of quality and detection.

4) The boundary of the inner cavity at the end part of the prefabricated superposed column is concave-convex, so that the interface area of new and old concrete is increased, the cast-in-place concrete and the prefabricated component can form good occlusion, the superposed component has strong integrity, the prefabricated hollow column can effectively reduce the weight of the prefabricated component, the on-site hoisting is convenient, and the component performance is superior to that of the traditional solid prefabricated column.

5) The improved superposed column has simplified or no-template in the middle section, easy assembling and disassembling of the template in the end section, low production cost and high production efficiency.

6) The U-shaped superposed beam reduces the weight of the component, is convenient to hoist, does not produce ribs at the end part of the component, and has low production cost, high production efficiency and convenient field installation. The U-shaped beam shell can provide a larger operation surface for placing the reinforcing steel bars on a construction site, and the reinforcing steel bars are convenient to install.

7) The prefabricated floor slab end does not have the muscle, avoids hoist and mount reinforcing bar collision, and convenient field installation improves component production efficiency simultaneously. And the full prefabricated floor slab is adopted, so that the construction progress is prevented from being influenced by the hardening strength of the concrete, and the field construction progress is improved. The fully-prefabricated floor slab can continue subsequent installation and construction without waiting for the strength of the cast-in-place concrete, and the speed is greatly increased.

The precast beam-column plate connection node will be described in detail with reference to specific embodiments.

The utility model provides a precast beam column slab connected node includes: 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; 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, at least part of the beam reinforcement cage is embedded in the U-shaped beam shell, and no rib is formed at two end parts of the composite 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. Wherein both ends of the superimposed column do not present ribs, as will be described below with respect to the above-described structure.

As shown in fig. 10 to 13, the precast beam-column plate connection node may include: at least one floor 8, at least two superposed columns, at least one superposed beam and a connecting body, wherein fig. 10 is a schematic perspective view of the third connecting body (a second beam longitudinal bar of the superposed beam) after being installed.

As shown in fig. 1a, 1b, fig. 2a to 2d and fig. 5, the column reinforcement cage includes a plurality of column stirrup net pieces 3 and column longitudinal ribs 4, the plurality of column stirrup net pieces 3 are arranged along the length direction of the superposed column at intervals, the plurality of column stirrup net pieces 3 and the column longitudinal ribs 4 are fixedly connected, for example, binding connection, welding connection and the like, the circumferential reinforcements of the column stirrup net pieces 3 are embedded in the column casing 1, and both ends of the column longitudinal ribs 4 do not extend out of the end surface of the column casing. The column longitudinal ribs 4 are completely embedded in the column shell or one part of the column longitudinal ribs 4 is embedded in the column shell 1, and the other part is positioned in the cavity 2 enclosed by the column shell. The two ends of the column longitudinal rib are not provided with ribs, so that a component production mold can be simplified, the component production efficiency is improved, and the component production cost is reduced.

As shown in fig. 3 and 10, the superposed 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 no reinforcement is present at both ends of the superposed beam, which is convenient for hoisting, the beam reinforcement cage includes a plurality of beam stirrup net sheets 7 and beam longitudinal reinforcements fixedly connected to the plurality of beam stirrup net sheets 7, and the plurality of beam stirrup net sheets 7 are arranged at intervals along the length direction of the superposed beam; the beam stirrup net sheets 7 are fixedly connected with the beam longitudinal bars, for example, in a binding connection mode, a welding connection mode and the like, one part of each beam stirrup net sheet 7 is embedded in the U-shaped beam shell, and the other part of each beam stirrup net sheet extends out of the opening end of the U-shaped beam shell to form one part of the connecting body. The beam longitudinal ribs comprise first beam longitudinal ribs 61 and second beam longitudinal ribs 62 (third connectors), the first beam longitudinal ribs 61 are embedded in the U-shaped beam shell and are prefabricated, the second beam longitudinal ribs 62 are arranged at the bottom of the cavity of the U-shaped beam shell 5 and the top of the beam stirrup net piece 7, and the second beam longitudinal ribs 62 penetrate through or are anchored (after concrete pouring is to be carried out) at a joint part surrounded by the superposed columns and the superposed beams. The first beam longitudinal ribs 61 do not extend out from two ends of the U-shaped beam shell 5, and production and installation are facilitated. The second beam longitudinal ribs 62 are not prefabricated in the composite beam, but the second beam longitudinal ribs 62 are installed before cast-in-place to ensure mutual interference of the reinforcing steel bars in the lifting process of the composite beam, for example, a part of the second beam longitudinal ribs 62 are placed at the bottom of the cavity of the U-shaped beam shell, and the other part of the second beam longitudinal ribs 62 penetrate through the beam stirrup net piece 7 and extend out of the top of the opening end of the U-shaped beam shell 5 and are fixedly connected with the beam stirrup net piece 7, for example, through binding connection, welding connection and the like. One end of the second beam longitudinal rib 62 penetrates or anchors (after concrete is poured) a joint portion surrounded by the superposed columns and the superposed beams, thereby becoming a part of a connecting body for lap joint between the superposed beams and the superposed columns and between the superposed beams. Optionally, the beam reinforcement cage further comprises a beam waist rib and a beam tie bar, wherein the beam waist rib and the beam tie bar are arranged according to specific conditions, and may or may not be arranged.

As shown in FIG. 4, the floor slab 8 is a fully prefabricated floor slab, no rib is arranged on the periphery of the floor slab 8, for example, no rib is arranged on the end part, and the mutual interference between prefabricated parts can not be caused in the construction process, so that the production is more convenient. Set up a plurality of notches 9 along the marginal portion interval of floor, notch 9 is used for placing the connector, the limit at the direction perpendicular to place of notch 9, and the connector should conveniently be put into to the size of notch 9 and satisfy the requirement of connector overlap joint length, and the connector in notch 9 is connecting reinforcement 10 this moment, and one section of connecting reinforcement 10 is placed in notch 9, and another section of connecting reinforcement then the overlap joint is in the beam reinforcement cage of composite beam. The arrangement of the connecting steel bars and the notches avoids the ribs at the edge part of the floor slab, the production mold is simplified, and the production is convenient.

As shown in fig. 12, concrete is poured into the cavity 2 of the superposed column, the cavity enclosed by the U-shaped beam shell 5 of the superposed beam, the joint enclosed by the superposed column and the superposed beam and the notch 9 of the floor slab 8 to form the precast beam-column-slab connection node. Wherein figure 12 is a schematic illustration of casting concrete.

As shown in fig. 9, when both ends of the column longitudinal rib 4 do not extend out of the column shell 1, the first connecting body is an overlapping reinforcement cage 11, the overlapping reinforcement cage 11 is arranged in the cavity 2 of the overlapping column in the process of installing the connecting body, and one end of the overlapping reinforcement cage 11 penetrates through the joint part enclosed by the overlapping column and the overlapping beam and extends into the cavity of the other overlapping column. For example, one end of the overlapping reinforcement cage 11 is placed in the cavity 2 of the lower laminated column, the other end of the overlapping reinforcement cage 11 extends into the joint part enclosed by the laminated column and the laminated beam, and a part of the overlapping reinforcement cage 11 further extends into the cavity 2 of the upper laminated column to form a connector, so that a lap joint is formed between the upper laminated column and the lower laminated column.

As shown in fig. 1b, 2b and 2d, a plurality of grooves are circumferentially spaced on the inner surface of the cylindrical shell 1 on the side of the cavity, and a structure with alternate convexes and concaves is formed on the inner surface of the cylindrical shell 1. The recess is located the tip of column shell 1, extends to a column shell certain position and does not link up whole column shell length from a terminal surface of column shell 1 along column shell length direction, can place the connector at the recess part, for example connecting reinforcement etc. prefabricated superposed column on upper and lower layer realizes the overlap joint formula and connects through placing connecting reinforcement in the cavity. The concave-convex form of the inner cavity 2 of the superposed column reduces the distance between the lapped reinforcing steel bars, does not cause the weakening of the section of a component, and is simple in on-site reinforcing steel bar construction and positioning. The groove extends from one end face of the column shell 1 to the other end face of the column shell 1 along the length direction of the column shell, and the groove penetrates through the whole column shell 1 in the whole length range of the column shell 1.

The end part of the column shell 1 can be also provided with a groove along the circumferential direction on the inner surface, the wall thickness of the end part of the column shell 1, which extends from the end surface of the column shell 1 to a second preset position of the column shell (for example, the middle position of the column shell) along the length direction of the column shell 1, is smaller than that of the middle part, that is, the thickness of the column shell 1 can be changed along the length direction of the column. Optionally, the end portions of the two ends of the column casing 1 are respectively provided with the above-mentioned grooves, the grooves are used for placing the connecting bodies, the column end is improved to be a superposed column, and the column middle section can be free from simplification or templates.

As shown in the schematic top view of the composite post in fig. 2a to 2d, the cross-sectional shape of the cavity 2 of the composite post includes, but is not limited to, one or more of a rectangle, a circle, a polygon, a rectangle with concave-convex shape, a circle with concave-convex shape, or a polygon with concave-convex shape. Optionally, the cross-sectional shape of the column shell 1 of the superposed column is one of rectangular, circular or polygonal.

The embodiment also provides a construction method of a precast beam-column plate connection node, as shown in fig. 5 to 13, including: installing a superposed column (as shown in fig. 5); mounting a support 12 (shown in figure 6) for the composite beam and floor; mounting the composite beams and floor slab in turn to the support 12 (as shown in figures 7 to 8); installing connectors (installing the overlap reinforcement cage 11 into the superposed column as shown in fig. 8, installing the second beam longitudinal bar 62 of the superposed beam and the connecting reinforcement 10 of the floor slab notch 9 as shown in fig. 9 to 11); and pouring concrete into the cavity 2 of the superposed column, the cavity enclosed by the U-shaped beam shell 5 of the superposed beam, at least one part of the floor slab 8 and the joint enclosed by the superposed column and the superposed beam. Alternatively, the floor is a fully prefabricated floor, and the notch 9 on the floor needs to be poured. Optionally, the floor slab is a laminated floor slab, and the notch 9 on the floor slab and the cavity or the part to be cast of the floor slab need to be cast. As shown in fig. 14, in the step of installing the superposed beams and the supports 12 for the floor slab, the supports for the floor slab 8 may not be vertical supports, or the supports 12 may be directly disposed on the side surfaces of the superposed beams 6, for example, the floor slab may be supported by angle steel, the upper end surface of the angle steel supports the floor slab 8, and the other end surface of the angle steel is fixedly connected to the side surface of the superposed beams 6 by bolts, so that the installation of the vertical supports may be eliminated, and the construction efficiency may be improved.

And finishing the construction of the upper layer after the concrete reaches a certain strength, and repeating the installation sequence to construct the prefabricated members on the upper layer.

In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be 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/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.

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

It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.

Claims

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.