CN211523535U - Cavity prefabricated column node connecting structure - Google Patents
Cavity prefabricated column node connecting structure Download PDFInfo
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- CN211523535U CN211523535U CN201922340239.4U CN201922340239U CN211523535U CN 211523535 U CN211523535 U CN 211523535U CN 201922340239 U CN201922340239 U CN 201922340239U CN 211523535 U CN211523535 U CN 211523535U
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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 stirrup. 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 prefabricated column steel bars are shielded by the end shell. The first prefabricated column steel bar is in lap joint with the second prefabricated column steel bar, and the stirrup is bound at the lap joint part; ultrahigh-performance concrete is poured between the first end of the first cavity prefabricated column and the second end of the second cavity prefabricated column; the first prefabricated column reinforcing steel bars and the second prefabricated column reinforcing steel bars are embedded into the ultrahigh-performance concrete to form integral connection. For the node connection structure of current solid prefabricated post, this disclosure is convenient for observe when hoist and mount, but quick hoist and mount, grout quality easily ensure. Compared with the existing cavity prefabricated column node connecting structure, the cavity prefabricated column node connecting structure has the advantages that a specially-made steel bar connecting piece is not needed, and the cost is lower.
Description
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; the first prefabricated column steel bars and the second prefabricated column steel bars form lap joints; and
the stirrup is bound at the lap joint part between the first prefabricated column reinforcing steel bar and the second prefabricated column reinforcing steel bar;
wherein, ultra-high performance concrete is poured in at least the end shell; and the first prefabricated column reinforcing steel bars and the second prefabricated column reinforcing steel bars are embedded into the ultrahigh-performance concrete to form integral connection.
According to at least one embodiment of the present disclosure, the first precast column reinforcing steel bar and the second precast column reinforcing steel bar are provided with a plurality of steel bars and have corresponding positions; the lap joint of the first prefabricated column reinforcing steel bar and the second prefabricated column reinforcing steel bar is tightly attached together.
According to at least one embodiment of the present disclosure, the stirrups are wound in the same plane and bound to the lap joints of each of the first prefabricated column reinforcing steel bars and the second prefabricated column reinforcing steel bars.
According to at least one embodiment of the present disclosure, the stirrups are provided with a plurality of layers in the axial direction, and each layer of stirrups is arranged in parallel at intervals.
According to at least one embodiment of the present disclosure, the non-overlapping portions of the first and/or second prefabricated column rebar are also tied with the stirrup.
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 side of the template removed.
Description of reference numerals:
1-first cavity precast column (upper precast column); 2-second cavity precast column (lower precast column); 3-first prefabricated column steel bars; 4-second prefabricated column steel bars; 5-stirrup; 6-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.
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.
Therefore, the present disclosure provides a cavity prefabricated column node connection structure and a construction method thereof, aiming at the cavity prefabricated column node connection structure, and trying to solve or at least alleviate at least one of the above technical problems.
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 cavity 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. The utility model provides a prefabricated post node connection structure of cavity, including prefabricated post of first cavity 1, prefabricated post of second cavity 2 and stirrup 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, which is intended to be butted against a target surface to form a joint 6, and thus 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 6. 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 6. First prefabricated column rebar 3 and second prefabricated column rebar 4 protrude out of the planar end of the prefabricated column and function to form a rebar connection between the two prefabricated columns. The first prefabricated column reinforcing steel bar 3 and the second prefabricated column reinforcing steel bar 4 are overlapped. The steel bar lap joint refers to a connecting method that two steel bars have certain overlapping length and are bound by binding wires, and is suitable for connecting the steel bars with smaller diameters. 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 stirrups 5 are wound on the lap joint part between the first prefabricated column reinforcing steel bars 3 and the second prefabricated column reinforcing steel bars 4, and the stirrups 5 are used for ensuring the stability of the lap joint part between the first prefabricated column reinforcing steel bars 3 and the second prefabricated column reinforcing steel bars 4 during construction; on the other hand, after the concrete is poured, the stirrups 5 can limit the development of cracks in the concrete and improve the structural strength. Pouring ultrahigh-performance concrete at least between the first end of the first cavity prefabricated column 1 and the second end of the second cavity prefabricated column 2; first prefabricated post reinforcing bar 3 and second prefabricated post reinforcing bar 4 and stirrup 5 all bury in the ultra high performance concrete, make first cavity prefabricated post 1 and second cavity prefabricated post 2 form the monolithic connection. 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. Adopt the lapped form of first prefabricated post reinforcing bar 3 and the prefabricated post reinforcing bar 4 of second, avoided using the muffjoint mode among the prior art, convenient construction forms firm connection between stirrup 5 and prefabricated post reinforcing bar and the ultrahigh performance concrete of packing.
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 6, the prefabricated post reinforcing bar that outwards stretches out that two prefabricated post links set up is all kept off in the tip casing, two prefabricated post links set up the prefabricated post reinforcing bar that outwards stretches out, form through overlap joint and 5 ligatures of stirrup between the prefabricated post reinforcing bar is connected two corresponding prefabricated post reinforcing bars, it is inconvenient to have avoided using the muffjoint construction among the prior art, construction quality is difficult to the shortcoming of guaranteeing. The prefabricated column steel bars, the stirrups 5 and the ultrahigh-performance concrete are firmly connected through the filled ultrahigh-performance concrete. The ultra-high performance concrete has ultra-high durability and mechanical property, has strong compressive strength and bond stress, has certain tensile and shearing resistance, and improves the strength of the joint connection structure. For the node connection structure of current solid prefabricated post, this disclosure is convenient for observe when hoist and mount, but quick hoist and mount, grout quality easily ensure. Compared with the existing cavity prefabricated column node connecting structure, the cavity prefabricated column node connecting structure has the advantages that a specially-made steel bar connecting piece is not needed, and the cost is lower.
In one embodiment of the present disclosure, the first prefabricated column steel bar 3 and the second prefabricated column steel bar 4 are both provided with a plurality of steel bars and correspond in position. The lap joint of the first prefabricated column reinforcing steel bar 3 and the second prefabricated column reinforcing steel bar 4 is tightly attached together.
In one embodiment of the present disclosure, the stirrup 5 may be wound in the same plane and tied together with the lap joint of each of the first and second prefabricated column reinforcing bars 3 and 4. The stability of the connection at the lap joint can be better improved through the binding of the stirrups 5. The stirrups 5 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.
Optionally, the stirrups 5 may also be provided with multiple layers in the axial direction, and each layer of stirrups 5 is arranged in parallel at intervals. The provision of the multi-layer stirrup 5 increases the uniformity of reception.
In each of the above embodiments, the non-overlapping portions of the first and/or second prefabricated column reinforcing bars 3 and 4 are also bound with the stirrups 5. With reference to the orientation shown in fig. 1, the prefabricated column steel bars extending out of the lower end of the first cavity prefabricated column 1 located above are connected to the prefabricated column steel bars extending out of the upper end of the second cavity prefabricated column 2 located below in an overlapping and stirrup 5 manner. The space between the upper prefabricated column and the lower prefabricated column is filled with ultra-high performance concrete to form a node connecting structure between the two prefabricated columns.
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 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 5 of the second prefabricated column steel bars 4 in place, wherein the binding in place refers to binding operation at the positions where the stirrups 5 need to be bound.
The first cavity prefabricated column 1 is hoisted to the operation surface and slowly falls down, so that the second prefabricated column reinforcing steel bars 4 are all overlapped with the first prefabricated column reinforcing steel bars 3. The prefabricated post of second cavity 2's that second prefabricated post reinforcing bar 4 is located the below top upwards stretches out, aligns second prefabricated post reinforcing bar 4 and corresponding first prefabricated post reinforcing bar 3 through tower crane or travelling crane under workman's assistance.
And (5) binding stirrups at the lap joint of the second prefabricated column reinforcing steel bars 4 and the first prefabricated column reinforcing steel bars 3.
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 6, and a closed pouring space is formed in the end shell. In this step, the seam 6 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 6.
And pouring the ultra-high performance concrete into the pouring space, so that the ultra-high performance concrete is at least filled into the pouring space. In the process of filling the ultra-high performance concrete into the pouring space, the problem of construction quality of air gaps caused by the fact that the sleeve is not easy to flow into the sleeve due to the sleeve in the prior art is solved. And filling the pouring space with ultrahigh-performance concrete, and embedding the first prefabricated column reinforcing steel bars 3, the second prefabricated column reinforcing steel bars 4 and the stirrups 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. and binding the stirrups 5 of the lower prefabricated column 2 in place.
2. And hoisting the upper prefabricated column 1 to the operation surface by using a tower crane or a mobile crane, and slowly dropping to ensure that all the steel bars extending out of the lower prefabricated column 2 are lapped with the steel bars extending out of the upper prefabricated column 1.
3. And binding a stirrup 5 at the overlapping part of the steel bar.
4. 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 6.
5. 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 6.
6. 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 mutually in order to form seam 6, the prefabricated post reinforcing bar that outwards stretches out that two prefabricated post links set up is all kept off in the tip casing, two prefabricated post links set up the prefabricated post reinforcing bar that outwards stretches out, two prefabricated post reinforcing bars that will correspond are connected through the form of overlap joint and 5 ligatures of stirrup between the prefabricated post reinforcing bar, it is inconvenient to have avoided using the muffjoint construction among the prior art, construction quality is difficult to the shortcoming of guaranteeing. The prefabricated column steel bars, the stirrups 5 and the ultrahigh-performance concrete are firmly connected through the filled ultrahigh-performance concrete. The ultra-high performance concrete has ultra-high durability and mechanical property, has strong compressive strength and bond stress, has certain tensile and shearing resistance, and improves the strength of the joint connection structure. For the node connection structure of current solid prefabricated post, this disclosure is convenient for observe when hoist and mount, but quick hoist and mount, grout quality easily ensure. Compared with the existing cavity prefabricated column node connecting structure, the cavity prefabricated column node connecting structure has the advantages that a specially-made steel bar connecting piece is not needed, and the cost is lower.
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 (5)
1. The utility model provides a prefabricated post nodal connection structure of cavity which characterized in that 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; the first prefabricated column steel bars and the second prefabricated column steel bars form lap joints; and
the stirrup is bound at the lap joint part between the first prefabricated column reinforcing steel bar and the second prefabricated column reinforcing steel bar;
wherein, ultra-high performance concrete is poured in at least the end shell; and the first prefabricated column reinforcing steel bars and the second prefabricated column reinforcing steel bars are embedded into the ultrahigh-performance concrete to form integral connection.
2. The cavity prefabricated column node connecting structure of claim 1, wherein a plurality of first prefabricated column reinforcing steel bars and a plurality of second prefabricated column reinforcing steel bars are arranged and correspond in position; the lap joint of the first prefabricated column reinforcing steel bar and the second prefabricated column reinforcing steel bar is tightly attached together.
3. The cavity prefabricated pillar joint connection structure of claim 2, wherein said stirrup is wound in the same plane and tied to each of the overlapped portions of said first prefabricated pillar reinforcement and said second prefabricated pillar reinforcement.
4. The cavity prefabricated column joint connecting structure of claim 3, wherein the stirrups are axially provided with a plurality of layers, and the stirrups in each layer are arranged at intervals in parallel.
5. A cavity prefabricated column node connection structure according to any one of claims 1 to 4, wherein non-overlapping portions of said first prefabricated column reinforcing steel bars and/or said second prefabricated column reinforcing steel bars are also bound with said stirrups.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922340239.4U CN211523535U (en) | 2019-12-23 | 2019-12-23 | Cavity prefabricated column node connecting structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922340239.4U CN211523535U (en) | 2019-12-23 | 2019-12-23 | Cavity prefabricated column node connecting structure |
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| CN211523535U true CN211523535U (en) | 2020-09-18 |
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| CN201922340239.4U Active CN211523535U (en) | 2019-12-23 | 2019-12-23 | Cavity prefabricated column node connecting structure |
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Address after: 102206 1st floor, building 6, 8 Beiqing Road, Huilongguan town, Changping District, Beijing Patentee after: Sany Construction Technology Co.,Ltd. Address before: Room 301, building 6, No. 8, Beiqing Road, Huilongguan town, Changping District, Beijing Patentee before: SANY CONSTRUCTION TECHNOLOGY Co.,Ltd. |