CN211523534U

CN211523534U - Cavity prefabricated column node connecting structure

Info

Publication number: CN211523534U
Application number: CN201922340185.1U
Authority: CN
Inventors: 王铎; 马荣全; 王洪强; 李爽; 孙伯禹; 谢志明
Original assignee: Sany Construction Technology Co Ltd
Current assignee: Sany Construction Technology Co Ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-09-18
Anticipated expiration: 2029-12-23

Abstract

The utility model provides a prefabricated post node connection structure of cavity, including prefabricated post of first cavity, the prefabricated post of second cavity and half opening sleeve. The first end of the first cavity precast column is opposite to the second end of the second cavity precast column; a first end of the first cavity prefabricated column is provided with a first prefabricated column steel bar and an end shell; and a second end of the second cavity prefabricated column is provided with a second prefabricated column steel bar. The end shell shields the first prefabricated column reinforcing steel bars and the second prefabricated column reinforcing steel bars. The bottom of the end housing is adapted to interface with a target surface to form a seam. The first connecting end of the half-opening sleeve is fixedly connected with the first prefabricated column steel bar; the second prefabricated column steel bar is inserted into the half-opening sleeve from the second connecting end; and ultrahigh-performance concrete is filled between the second prefabricated column reinforcing steel bars and the half-opening sleeve. Compared with the existing cavity prefabricated column node connection structure, the method does not need to adopt a specially-made steel bar connecting piece, is lower in cost, and is easy to guarantee grouting quality.

Description

Cavity prefabricated column node connecting structure

Technical Field

The utility model relates to a building element construction field especially relates to a cavity precast column node connection structure.

Background

The fabricated building refers to a building fabricated at a construction site using prefabricated parts. In recent years, the development of the assembled building in China is rapid, and the assembled integral type superposed shear wall structure is produced at the same time. Superimposed shear walls and prefabricated columns are common fabricated components. The prefabricated column node used for connecting prefabricated columns is used as an important component connecting node of a fabricated structure and is always a difficulty solved by the fabricated frame structure.

The existing prefabricated column node connection is divided into a prefabricated solid column node and a prefabricated cavity column node. The prefabricated solid column node is characterized in that a groove is reserved at the bottom of the upper prefabricated solid column, a sleeve is embedded in the groove, and a steel bar in the upper prefabricated solid column is connected with the upper end of the sleeve. And the steel bars in the prefabricated solid column at the lower part extend upwards out of the end part of the prefabricated column and extend into the sleeve in the groove at the bottom of the prefabricated solid column at the upper part, and then grouting material is used for grouting into the sleeve to form connection. The prefabricated cavity column is exposed at the connecting position, namely, the reinforcing steel bars at the two ends of the prefabricated cavity column extend outwards, and the reinforcing steel bars of the upper prefabricated cavity column and the lower prefabricated cavity column are connected by adopting the connecting piece.

However, the connection mode of the prefabricated solid column node adopted at present cannot be observed when grouting materials are injected into the sleeve, and the construction quality is difficult to guarantee. The connecting piece of the adopted prefabricated hollow column needs to adopt a specially-made steel bar connecting piece, and the cost is higher.

SUMMERY OF THE UTILITY MODEL

To solve or at least alleviate at least one of the above technical problems, the present disclosure provides a cavity preform column node connection structure.

According to an aspect of the present disclosure, a cavity prefabricated column node connection structure includes:

the first end of the first cavity prefabricated column is provided with a first prefabricated column steel bar extending outwards and an end shell; the end shell is arranged around the whole circumference, and shields the first precast column steel bar on the side surface; the bottom of the end shell is open and is provided with a flat end face; the bottom of the end shell is used for facing and jointing with a target to form a joint;

a second end of the second cavity prefabricated column is provided with a second prefabricated column steel bar which extends outwards; the second prefabricated column steel bar extends into the end shell; and

the half-opening sleeve comprises a first connecting end and a second connecting end; the first connecting end is fixedly connected with the first precast column steel bar; the second prefabricated column reinforcing steel bar is inserted into the half-opening sleeve from the second connecting end;

and ultrahigh-performance concrete is filled between at least the second prefabricated column reinforcing steel bars and the half-opening sleeve, so that the first prefabricated column reinforcing steel bars and the second prefabricated column reinforcing steel bars are connected.

According to at least one embodiment of the disclosure, the first connecting end is provided with a threaded hole, and the half-open sleeve is connected with the first precast column steel bar through the threaded hole; the second connecting end is provided with a pouring cavity which is opened to the outside at the side surface and the bottom surface of the semi-open sleeve and is used for enabling the ultra-high performance concrete to flow into the pouring cavity from the side surface and the bottom surface of the semi-open sleeve; and the second prefabricated column steel bar extends into the pouring cavity and is fixedly connected with the half-opening sleeve through the ultra-high performance concrete.

According to at least one embodiment of the present disclosure, the half split sleeve is provided with a first body and a second body arranged in an axial direction; the first body is in a frustum cone shape, and the second body is in a semi-cylindrical shape split along the axial direction;

the first body forms the first connecting end, and the threaded hole is a through hole which penetrates through the first body along an axis;

the second body forms the second link, fills the cavity and is setting up for the semi-cylindrical recess in the second body, the semi-cylindrical recess along the axis from the bottom of second body run through to the top and with the screw hole intercommunication.

According to at least one embodiment of the present disclosure, the maximum outer diameter of the first body is the same as the outer diameter of the second body.

According to at least one embodiment of the present disclosure, the first body and the second body are integrally formed.

According to at least one embodiment of the present disclosure, the first body and the second body are formed as two parts, fixedly connected together.

According to at least one embodiment of the present disclosure, at least a space surrounded by the end shell is filled with ultra high performance concrete; the first prefabricated column reinforcing steel bar, the second prefabricated column reinforcing steel bar and the half-opening sleeve are buried in the ultra-high performance concrete, so that the first cavity prefabricated column and the second cavity prefabricated column are connected to form a whole.

According to at least one embodiment of the present disclosure, the first prefabricated column reinforcing bars are bound with stirrups that wind each first prefabricated column reinforcing bar in the same horizontal plane.

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 perspective view of an exemplary embodiment of a cavity preform column node connection structure of the present disclosure.

Fig. 1 is an internal structure view of one end portion of the housing removed.

Description of reference numerals:

1-first cavity precast column (upper cavity precast column); 2-second cavity precast column (lower cavity precast column); 3-first prefabricated column steel bars; 4-second prefabricated column steel bars; 5-a half-split sleeve; 6-stirrup; 7-seaming.

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.

Therefore, the present disclosure is directed to a cavity prefabricated column node connection structure, which seeks to solve or at least alleviate at least one of the above technical problems, and discloses a cavity prefabricated column node connection structure.

In the application document of the present disclosure, in order to facilitate description of the position relationship of each component in the cavity precast column node connection structure, the vertical height direction of the cavity precast column node connection structure is referred to as the longitudinal direction or the vertical direction by taking the position of the cavity precast column node connection structure after being constructed in place as a standard; the left and right width directions of the cavity prefabricated column node connecting structure are called as transverse directions or horizontal directions; the thickness direction of the cavity prefabricated column node connecting structure is perpendicular to a plane formed in the vertical direction and the horizontal direction. The prefabricated column node connecting structure is provided with an axis in the vertical direction.

According to one aspect of the present disclosure, refer to a perspective view of an exemplary embodiment of a cavity preform column node connection structure of the present disclosure as shown in fig. 1. Provided is a cavity prefabricated column node connecting structure which comprises a first cavity prefabricated column 1, a second cavity prefabricated column 2 and a half-opening sleeve 5. The first cavity prefabricated column 1 and the second cavity prefabricated column 2 are both formed by pouring concrete in a prefabricated mode, a cavity is formed in each prefabricated column, and reinforcing steel bars are embedded in concrete side walls of the prefabricated columns. The two ends of the first and second cavity preform

columns

1 and 2 may be provided in different forms. Wherein the first end of the first cavity preform column 1 is the end opposite to and connected to the second end of the second cavity preform column 2. For example, a first cavity preform column 1 is positioned above a second cavity preform column 2, and a lower end of the first cavity preform column 1 is opposite to and connected to an upper end of the second cavity preform column 2. The first end of the first cavity prefabricated column 1 is provided with a first prefabricated column steel bar 3 extending outwards and an end shell. The end shell is a side wall with a certain thickness formed around the peripheral edge of the first end of the first cavity prefabricated column 1, and the thickness of the side wall of the end shell is smaller than that of the side wall of the first cavity prefabricated column 1. The end shell is arranged around the whole circumference and shields the first prefabricated column steel bar 3 at the side surface. At the same time, the bottom of the end housing is open and has a flat end face, and the bottom of the end housing is intended to be butted against a target surface to form a seam 7, and thus is a flat end face. And a second end of the second cavity prefabricated column 2 is provided with a second prefabricated column steel bar 4 extending outwards. The second end of the second cavity preform column 2 is butted against the bottom of the end shell forming a seam 7. The second precast column reinforcing bars 4 are extended into the end housing so as to be connected with the first precast column reinforcing bars 3. In other cases, if the second cavity precast column 2 has been cast with concrete along with the composite beams, the composite slab, the bottom of the end shell is in contact with the locating surface forming a seam 7. Optionally, the first prefabricated column steel bars 3 and the second prefabricated column steel bars 4 are arranged at intervals along the edge profiles of the first cavity prefabricated column 1 and the second cavity prefabricated column 2. The half-opening sleeve 5 comprises a first connecting end and a second connecting end; the half-split sleeve 5 is a sleeve-like member having two opposite ends, having a shaped sidewall enclosing a space; the half opening is that the side of the sleeve is formed with half side wall, and the other half is an open opening. The first connecting end is fixedly connected with the first prefabricated column reinforcing steel bar 3. The first connecting end of the half-opening sleeve 5 is sleeved at the end of the first precast column steel bar 3, and the fixed connection mode can adopt threaded connection, welding and the like. The second pre-cast column reinforcing bars 4 are inserted into the inside of the half split sleeve 5 from the second connection end. That is to say, half open sleeve 5's second link cover is established at the tip of prefabricated post reinforcing bar 4 of second, has certain space between the lateral wall of half open sleeve 5 and the prefabricated post reinforcing bar 4 of second, and this space is used for filling ultra high performance concrete usefulness. And ultrahigh-performance concrete is filled between at least the second prefabricated column reinforcing steel bars 4 and the half-opening sleeve 5, so that the first prefabricated column reinforcing steel bars 3 are connected with the second prefabricated column reinforcing steel bars 4. The Ultra-High Performance Concrete, called UHPC (Ultra-High Performance Concrete) for short, also called Reactive Powder Concrete (RPC), has Ultra-High durability, Ultra-High mechanical properties, stronger fluidity, compressive strength and bond stress which meet the design requirements of the precast column, and certain tensile and shear resistance. The semi-open sleeve 5 is used as a connecting piece between the first prefabricated column reinforcing steel bar 3 and the second prefabricated column reinforcing steel bar 4, one end of the semi-open sleeve is fixedly connected with the first prefabricated column reinforcing steel bar 3, and the connection can be performed before pouring construction, so that the construction is convenient; the other end of the second prefabricated column steel bar 4 can form firm connection with the filled ultrahigh-performance concrete, and the connection is realized after pouring construction.

The utility model discloses a prefabricated post node connection structure of cavity, the link that first prefabricated post of cavity 1 was equipped with prefabricated post 2 of tip casing and second cavity docks mutually in order to form seam 7, the prefabricated post reinforcing bar that outwards stretches out that two prefabricated post links set up is all shielded and is kept off in the tip casing, prefabricated post reinforcing bar is connected two corresponding prefabricated post reinforcing bars through half open sleeve 5, half open sleeve 5's one end and 3 fixed connection of first prefabricated post reinforcing bar, half open sleeve 5's the other end forms firm being connected through between filled ultra high performance concrete and the prefabricated post reinforcing bar 4 of second. Due to the fact that the fluidity of the ultra-high performance concrete is better, and the special half-opening structure of the half-opening sleeve 5 is added, the ultra-high performance concrete is filled between the second precast column reinforcing steel bars 4 and the half-opening sleeve 5 more easily. Compared with the existing cavity prefabricated column node connection structure, the method does not need to adopt a specially-made steel bar connecting piece, is lower in cost, and is easy to guarantee grouting quality.

In an embodiment of the present disclosure, the first connection end of the half-open sleeve 5 is provided with a threaded hole, the end of the first precast column steel bar 3 is provided with an external thread, and the half-open sleeve 5 is connected with the first precast column steel bar 3 through the threaded hole. The half-split sleeves 5 can be screwed to the ends of the corresponding first prefabricated column reinforcing bars 3 when the first cavity prefabricated column 1 is not hoisted in place. The second connecting end of the half-split sleeve 5 is provided with a pouring cavity which is open to the outside at both the side surface and the bottom surface of the half-split sleeve 5, and is used for enabling the ultra-high performance concrete to flow into the pouring cavity from the side surface and the bottom surface of the half-split sleeve 5. For example, the second connecting end of the half-open sleeve 5 may be provided with only a part of side wall, preferably a side wall capable of circumferentially surrounding at least half of the second prefabricated column reinforcing steel bar 4, the bottom of the second connecting end is not sealed, the part without the side wall is an open opening, and a part of space surrounded by the side wall forms a pouring cavity. The second precast column reinforcing steel bars 4 can extend into the pouring cavity from the bottom of the second connecting end and are fixedly connected with the half-opening sleeve 5 through the ultra-high performance concrete.

In one embodiment of the present disclosure, the half split sleeve 5 is provided with a first body and a second body disposed in the axial direction. The first body is in a cone frustum shape, and the second body is in a semi-cylindrical shape split along the axial direction. The small diameter end of the frustum cone-shaped first body faces outwards, and the large diameter end of the frustum cone-shaped first body is connected with the semi-cylindrical second body. The first body forms a first connecting end, and the threaded hole is a through hole which penetrates through the first body along an axis. The tip of first prefabricated post reinforcing bar 3 is equipped with the external screw thread, and the minor diameter end of the first body of truncated cone form passes through screw hole threaded connection at the tip of first prefabricated post reinforcing bar 3. The second body forms the second link, pours the cavity for setting up the semi-cylindrical recess in the second body, and the semi-cylindrical recess runs through to the top and communicates with the screw hole from the bottom of second body along the axis. That is, in this mode, the second body is formed by a semi-cylinder cut from the axis, and a semi-cylindrical groove extending along the axis is formed on a plane of one side of the semi-cylinder to form a pouring cavity, and the diameter of the semi-cylindrical groove is larger than the outer diameter of the second precast column reinforcing steel bar 4. The semi-cylindrical second body may also be formed by a sidewall that surrounds half of the axis, the sidewall having a thickness, the space surrounded by the sidewall forming a perfusion cavity. The second body can also adopt other modes to form, can understand, in the different modes that the second body adopted, all be formed with at the outside open-ended opening in bottom and side to make inside pouring cavity can be better fill ultra high performance concrete, avoid the retention space.

Further, the maximum outer diameter of the truncated cone-shaped first body is the same as the outer diameter of the semi-cylindrical second body. A flat surface is formed on the outside to facilitate better contact with the concrete.

Alternatively, the first body and the second body may be integrally formed. Alternatively, the first body and the second body may be formed as two parts and then fixedly coupled together. The manufacturing method can be appropriately selected according to the manufacturing cost.

In the above respective embodiments, the first and second cavity prefabricated

columns

1 and 2 may be formed by ordinary concrete prefabrication; at least the space surrounded by the end shell is filled with ultra-high performance concrete to form a connecting node of the two prefabricated columns. The cavities of the first and second cavity-prefabricated

columns

1 and 2 may also be filled with ultra-high performance concrete. The first prefabricated column reinforcing steel bar 3, the second prefabricated column reinforcing steel bar 4 and the half-opening sleeve 5 are all embedded in the ultra-high performance concrete, so that the first cavity prefabricated column 1 and the second cavity prefabricated column 2 are connected to form a whole. Meanwhile, the ultrahigh-performance concrete is filled between the second prefabricated column reinforcing steel bars 4 and the half-opening sleeve 5, so that the first prefabricated column reinforcing steel bars 3 are connected with the second prefabricated column reinforcing steel bars 4 into a whole through the half-opening sleeve 5, and reinforcing steel bar connection and concrete connection are formed between the two prefabricated columns. Referring to the position of fig. 1, the prefabricated column reinforcing steel bars extending out of the lower end of the first cavity prefabricated column 1 located above are connected to the prefabricated column reinforcing steel bars extending out of the upper end of the second cavity prefabricated column 2 located below through the half-open sleeve 5, and the space surrounded by the end shell is filled with ultra-high performance concrete to form a node connection structure between the two prefabricated columns.

In the above respective embodiments, the first prefabricated column reinforcing bars 3 are bound with the stirrups 6, and the stirrups 6 wind each of the first prefabricated column reinforcing bars 3 in the same horizontal plane. The stirrups 6 can be formed by winding a slightly thin steel bar on the prefabricated column steel bars extending out of the periphery in sequence according to a certain sequence to form a criss-cross winding form. One row of stirrups 6 can be arranged, and a plurality of rows of stirrups 6 can also be arranged in the longitudinal direction, and each row of stirrups 6 is positioned in different horizontal planes in the longitudinal direction. Through winding stirrup 6, can guarantee that the relative position of each prefabricated post reinforcing bar is fixed when the first prefabricated post of hoist 1 on the one hand, on the other hand can bury into the concrete after pouring the ultra high performance concrete and strengthen structural strength.

In order to further illustrate the advantages of the node connection structure of the present disclosure brought to the construction, a construction method of a cavity prefabricated column node connection structure is described, which is used for connecting two cavity prefabricated columns in the up-down direction, and the cavity prefabricated column node connection structure adopts the node connection structure in any of the above embodiments. The construction method comprises the following steps:

and binding the stirrups 6 of the first prefabricated column steel bars 3 in place, wherein the binding in place refers to binding operation at the positions where the stirrups 6 need to be bound. And connecting the first prefabricated column reinforcing steel bar 3 with the half-open sleeve 5. Wherein, one end of the semi-open sleeve 5 can be screwed on the end of the first prefabricated column steel bar 3, and the mode needs to provide an external thread on the end of the first prefabricated column steel bar 3; or may be fixed to the end of the first precast column reinforcing bar 3 by welding.

The first cavity prefabricated column 1 is hoisted to the operation surface and slowly falls down, so that the second prefabricated column steel bars 4 are completely extended into the half-opening sleeve 5. The prefabricated post of second cavity 2's top that second prefabricated post reinforcing bar 4 is located the below upwards stretches out, aligns second prefabricated post reinforcing bar 4 and corresponding half opening sleeve 5 under workman's assistance through tower crane or mobile crane.

And (3) continuously dropping the first cavity prefabricated column 1, so that the bottom of the end shell is contacted with the target surface to form a seam 7, and a closed pouring space is formed in the end shell. In this step, the seam 7 may be formed by bringing the bottom of the end shell into direct full contact with the top end of the second cavity preform column 2. If the second cavity precast column 2 has been cast with the composite beam, the composite slab, the bottom of the end shell is dropped onto the locating surface and fully contacted to form the seam 7.

And pouring ultra-high performance concrete into the pouring space, so that the ultra-high performance concrete is at least filled between the second prefabricated column reinforcing steel bars 4 and the half-open sleeve 5 and the pouring space. In the process of filling the ultra-high performance concrete into the pouring space, because the ultra-high performance concrete has stronger fluidity, and the side surface and the bottom surface of the half-open sleeve 5 are provided with open openings, the ultra-high performance concrete easily flows into the gap between the second prefabricated column reinforcing steel bar 4 and the half-open sleeve 5 and fills the whole gap, and the construction quality problem that an air gap is easily generated in the prior art is avoided. And filling ultrahigh-performance concrete into the pouring space, and embedding the first prefabricated column reinforcing steel bars 3, the second prefabricated column reinforcing steel bars 4 and the half-opening sleeve 5 into the poured concrete.

In one embodiment of the present disclosure, the step of pouring the ultra high performance concrete into the casting space includes:

the ultra high performance concrete is poured from the top opening of the first cavity precast column 1 located at the upper portion. The cavity of the cavity precast column can be poured with ultra-high performance concrete, so that the overall mechanical performance of the precast column is improved.

The following is a preferred exemplary embodiment of the construction method:

1. the stirrups 6 of the upper cavity prefabricated column 1 are bound in place, the extending steel bars are connected with the sleeve, the upper cavity prefabricated column 1 is lifted to an operation surface by using a tower crane or a mobile crane and slowly falls, and the steel bars extending out of the lower cavity prefabricated column 2 are all extended into the sleeve.

2. The upper cavity preform column 1 continues to fall until the bottom surface of the end shell is in full contact with the lower cavity preform column 2 forming a seam 7.

3. If the lower cavity precast column 2 has been cast with the composite girder and the composite slab, the upper cavity precast column 1 is dropped until the bottom surface of the end shell is completely contacted with the locating surface to form a joint 7.

4. And pouring slurry from the top opening of the upper cavity prefabricated column 1, so that the slurry is at least filled in the space enclosed by the end shell.

The grouting slurry is made of ultra-high performance concrete (UHPC), has stronger fluidity, higher compressive strength than that of a prefabricated column, and a bond stress meeting the design requirement and certain tensile and shear resistance.

According to each embodiment, this disclosed prefabricated post node connection structure of cavity, the link that first prefabricated post of cavity 1 was equipped with prefabricated post 2 of tip casing and second cavity docks in order to form seam 7 mutually, the prefabricated post reinforcing bar that outwards stretches out that two prefabricated post links set up is all sheltered from in the tip casing, prefabricated post reinforcing bar is connected two corresponding prefabricated post reinforcing bars through half open sleeve 5, half open sleeve 5's one end and first prefabricated post reinforcing bar 3 fixed connection, half open sleeve 5's the other end forms firm being connected through between filled ultra high performance concrete and the prefabricated post reinforcing bar of second 4. Due to the fact that the fluidity of the ultra-high performance concrete is better, and the special half-opening structure of the half-opening sleeve 5 is added, the ultra-high performance concrete is filled between the second precast column reinforcing steel bars 4 and the half-opening sleeve 5 more easily. Compared with the existing cavity prefabricated column node connection structure, the method does not need to adopt a specially-made steel bar connecting piece, is lower in cost, and is easy to guarantee grouting quality.

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. The utility model provides a prefabricated post nodal connection structure of cavity which characterized in that includes:

2. The cavity precast column node connection structure of claim 1, wherein the first connection end is provided with a threaded hole, and the half-open sleeve is connected with the first precast column steel bar through the threaded hole; the second connecting end is provided with a pouring cavity which is opened to the outside at the side surface and the bottom surface of the semi-open sleeve and is used for enabling the ultra-high performance concrete to flow into the pouring cavity from the side surface and the bottom surface of the semi-open sleeve; and the second prefabricated column steel bar extends into the pouring cavity and is fixedly connected with the half-opening sleeve through the ultra-high performance concrete.

3. The hollow precast column node connection structure according to claim 2, wherein the half split sleeve is provided with a first body and a second body which are axially arranged; the first body is in a frustum cone shape, and the second body is in a semi-cylindrical shape split along the axial direction;

4. The cavity preform column node connection structure of claim 3, wherein the maximum outer diameter of the first body is the same as the outer diameter of the second body.

5. The cavity preform column node connection structure of claim 4, wherein the first body and the second body are integrally formed.

6. The cavity preform column node connection structure of claim 4, wherein the first body and the second body are formed as two pieces, fixedly connected together.

7. The cavity prefabricated pillar node connection structure of any one of claims 1 to 6, wherein at least a space surrounded by said end shell is filled with ultra high performance concrete; the first prefabricated column reinforcing steel bar, the second prefabricated column reinforcing steel bar and the half-opening sleeve are buried in the ultra-high performance concrete, so that the first cavity prefabricated column and the second cavity prefabricated column are connected to form a whole.

8. The cavity prefabricated pillar node-connecting structure of claim 7, wherein said first prefabricated pillar reinforcement is bound with a stirrup, said stirrup winding each of said first prefabricated pillar reinforcements in the same horizontal plane.