CN118704607A - An assembled CFST-RC column equal-section conversion node and its construction method - Google Patents
An assembled CFST-RC column equal-section conversion node and its construction method Download PDFInfo
- Publication number
- CN118704607A CN118704607A CN202410892140.8A CN202410892140A CN118704607A CN 118704607 A CN118704607 A CN 118704607A CN 202410892140 A CN202410892140 A CN 202410892140A CN 118704607 A CN118704607 A CN 118704607A
- Authority
- CN
- China
- Prior art keywords
- steel pipe
- concrete column
- reinforced concrete
- perforated steel
- grouting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
- E04B1/215—Connections specially adapted therefor comprising metallic plates or parts
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/02—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for columns or like pillars; Special tying or clamping means therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Rod-Shaped Construction Members (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
本发明涉及一种装配式CFST‑RC柱等截面转换节点及其施工方法，包括以下步骤：将开孔钢管下半部分浇筑进钢筋混凝土柱内，并预留注浆孔道；将钢管安装至钢筋混凝土柱上方；将定位装置从钢管顶端向下垂直插入，将卡扣向外顶出，插入对应的抗剪环间隔内；通过注浆孔道向开孔钢管和钢管之间的空腔注浆。本发明的有益效果是：开孔钢管通过数层卡扣插入抗剪环之间，起到咬合作用，使得传力良好；且设于钢筋混凝土柱顶面的注浆孔道端部位于开孔钢管外侧，注浆过程中将钢管和开孔钢管之间的气泡全部向上挤出，有效保障了开孔钢管外侧的混凝土密实度，在浇筑灌浆料并硬化成型后，各相邻排抗剪环之间的灌浆料可近似为数个受压短柱，共同承担剪力。
The present invention relates to a prefabricated CFST-RC column equal section conversion node and a construction method thereof, comprising the following steps: pouring the lower half of a perforated steel pipe into a reinforced concrete column and reserving a grouting channel; installing the steel pipe above the reinforced concrete column; inserting a positioning device vertically downward from the top of the steel pipe, pushing the buckle outward, and inserting it into the corresponding shear ring interval; grouting the perforated steel pipe and the cavity between the steel pipe through the grouting channel. The beneficial effects of the present invention are: the perforated steel pipe is inserted between the shear rings through several layers of buckles, which plays a bite effect, so that the force transmission is good; and the end of the grouting channel arranged on the top surface of the reinforced concrete column is located outside the perforated steel pipe, and the bubbles between the steel pipe and the perforated steel pipe are all squeezed upward during the grouting process, which effectively ensures the concrete density outside the perforated steel pipe. After the grouting material is poured and hardened, the grouting material between each adjacent row of shear rings can be approximated as several compressed short columns, which jointly bear the shear force.
Description
Technical Field
The invention belongs to the technical field of steel structures and combined structures, and particularly relates to an assembled CFST-RC column constant-section conversion node and a construction method thereof.
Background
In actual engineering projects of high-rise and super-high-rise large public infrastructures such as terminal buildings, large-scale stadiums and bridges, the roof of the upper space structure is large in span, high in layer height, large in support column slenderness ratio, large in internal force under the action of load, low in lower frame structure layer, connected with a foundation and high in durability requirement. Therefore, in practical engineering, the upper part is a steel pipe concrete column, and the lower part is a reinforced concrete column, which are used as the bearing structure form of the building. The two columns are converted through the conversion node and transmit internal forces such as upper and lower layers of pressure, bending, shearing and the like.
The CFST-RC column conversion node commonly used in the engineering at present can be divided into a buried type, an end-supported type, an outsourcing type and the like, and can meet the requirements of strength, stability and the like, but the problems of complex structure, high construction difficulty, low material utilization rate and the like are often caused. Meanwhile, under the same load, the cross-sectional area of the reinforced concrete column is larger than that of the steel pipe concrete column, so that the cross-sectional areas of the upper column and the lower column are inconsistent, the upper steel pipe concrete is often downwards inserted into the lower reinforced concrete column in the existing engineering, but the method is more conservative, the material waste is serious, and the defects of uneven cross section, poor attractive form and the like of the node position exist.
Therefore, it is needed to design a constant section conversion node with equal sections of the upper column and the lower column, and meanwhile, the constant section conversion node has the characteristics of convenience in assembly, low construction difficulty and the like, and can increase the utilization rate of building space and reduce the consumption of building materials on the premise of meeting the safety and normal use requirements of strength, rigidity, stability and the like, so that the constant section conversion node has higher engineering application significance.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an assembled CFST-RC column constant-section conversion node and a construction method thereof.
Such fabricated CFST-RC column constant section transition node comprises: the device comprises a steel tube concrete column, a reinforced concrete column, an open-pore steel tube and a positioning device, wherein the steel tube concrete column is arranged above the reinforced concrete column, and the open-pore steel tube is inserted at a connecting node of the steel tube concrete column and the reinforced concrete column;
The lower half part of the perforated steel pipe is poured into the reinforced concrete column, a plurality of layers of holes are formed in the positions of the upper half part of the perforated steel pipe at different heights, a plurality of holes of each layer are annularly arranged, buckles are horizontally inserted into each hole, and a plurality of layers of shear rings are arranged on the inner wall of the steel pipe concrete column corresponding to the holes; when the positioning device is inserted into the perforated steel pipe, the buckle extends out of the perforated steel pipe from the inside of the perforated steel pipe and is inserted between the shearing rings.
Preferably, the bottom of the buckle is a plane, one end of the top of the buckle facing the inner side of the perforated steel pipe is a downward inclined plane, one end of the top of the buckle facing the outer side of the perforated steel pipe is a plane, an inserting hole is formed in the plane, a columnar cavity is formed above the perforated steel pipe corresponding to the inserting hole, a plug pin is inserted in the columnar cavity, and a spring is arranged between the top end of the plug pin and the top end of the columnar cavity; the bottom end of the bolt is wedge-shaped, steel pipe with jack close to open pore one side of the inner side is an inclined plane.
Preferably, a roller is arranged at the end part of the inclined plane towards the inner side of the perforated steel pipe, when the positioning device is inserted into the perforated steel pipe, the outer wall of the positioning device is propped against the roller, and when the positioning device moves downwards, the roller rolls on the outer wall of the positioning device.
Preferably, the reinforced concrete column comprises vertical longitudinal ribs, and the vertical longitudinal ribs are welded with the outer surface of the perforated steel pipe; the positioning device comprises an open pore circular ring and a thin-wall steel pipe, wherein the outer diameter of the thin-wall steel pipe is smaller than or equal to the inner wall of the open pore steel pipe, the open pore circular ring is fixed at the top end of the thin-wall steel pipe, and an open pore is formed in the open pore circular ring and used for allowing vertical longitudinal ribs to pass through and concrete slurry to flow out.
The construction method of the assembled CFST-RC column constant-section conversion node comprises the following steps:
binding a reinforced concrete column reinforcement cage and arranging vertical longitudinal ribs;
inserting the lower half part of the perforated steel pipe into a reinforced concrete column pouring area, and welding with the vertical longitudinal ribs;
Thirdly, supporting a mould and pouring a reinforced concrete column, pouring the lower half part of the perforated steel pipe into the reinforced concrete column, and reserving a grouting pore canal extending to the top surface of the reinforced concrete column;
step four, mounting the steel pipe above the reinforced concrete column;
step five, vertically inserting the positioning device downwards from the top end of the steel pipe, sequentially contacting the positioning device with a plurality of layers of buckles from top to bottom, ejecting the buckles outwards, and inserting the buckles into the corresponding shear ring intervals;
Step six, grouting the cavity between the perforated steel pipe and the steel pipe through the grouting pore canal, overflowing the slurry from the top of the positioning device, flowing into the perforated steel pipe, and pouring the slurry until the slurry reaches the top end face of the steel pipe, thereby completing the construction of the conversion node.
Preferably, one end of the grouting duct is arranged on the side wall of the reinforced concrete column, the other end of the grouting duct is arranged on the top surface of the reinforced concrete column, the end part of the grouting duct arranged on the top surface of the reinforced concrete column is positioned on the outer side of the perforated steel pipe, in the sixth step, grouting is carried out from one end of the grouting duct arranged on the side wall of the reinforced concrete column, grouting is carried out from one end of the grouting duct arranged on the top surface of the reinforced concrete column to a cavity between the perforated steel pipe and the steel pipe, and after the grouting overflows from the top end of the cavity between the perforated steel pipe and the steel pipe, the grouting enters the perforated steel pipe, and the space between the perforated steel pipe and the positioning device are poured.
In the third step, a grout outlet channel is reserved during pouring of the reinforced concrete column, one end of the grout outlet channel is arranged at the top of the reinforced concrete column on the inner side of the perforated steel pipe, and the other end of the grout outlet channel is arranged on the side wall of the reinforced concrete column below the bottom end of the perforated steel pipe; and step six, the slurry overflows from the top end of the cavity between the perforated steel pipe and the steel pipe, flows out of the side wall of the reinforced concrete column through the slurry outlet channel after entering the perforated steel pipe, and plugs the slurry outlet channel from one end of the side wall of the reinforced concrete column after the slurry flow velocity of the slurry flowing out of one end of the side wall of the reinforced concrete column of the slurry outlet channel is uniform.
The beneficial effects of the invention are as follows:
1) The node structure is simple, stirrups are not arranged in the node area, the problem that the node area of the traditional conversion node is dense in reinforcing steel bars so that construction is difficult to perform is avoided, complicated construction caused by the fact that welding work with longitudinal ribs is performed in a steel pipe is avoided, construction difficulty is greatly reduced, and working effect is improved; the perforated steel pipe is inserted between the shearing rings through a plurality of layers of buckles to play a role in biting, so that the force transmission is good; and the grouting pore canal end part arranged on the top surface of the reinforced concrete column is positioned on the outer side of the perforated steel pipe, air bubbles between the steel pipe and the perforated steel pipe are completely extruded upwards in the grouting process, the concrete compactness on the outer side of the perforated steel pipe is effectively ensured, and after grouting materials are poured and hardened and formed, grouting materials between each adjacent row of shear rings can be similar to a plurality of short columns under pressure to bear shearing force together.
2) According to the invention, the construction method of the traditional upper layer concrete filled steel tube column downward insertion is greatly optimized by the node, the reasonable transition between the upper layer concrete filled steel tube column and the lower layer reinforced concrete column is realized while the performance requirement is met, and the sections of the upper layer column and the lower layer column are consistent, so that the section of the node position is smooth, the form is attractive, the space utilization rate is improved, and the building materials are saved; the lower half section of the perforated steel pipe is poured in the reinforced concrete column, so that reliable connection between the upper reinforced concrete column and the lower reinforced concrete column can be effectively enhanced, better continuity of rigidity change is achieved, and the strength and the ductility of the conversion node are improved.
3) According to the invention, the bolt for temporarily clamping the buckle is arranged above the opening of the perforated steel pipe, and is extruded into the jack on the upper surface of the buckle through the spring, so that the buckle cannot fall out of the opening when the positioning device is not inserted; the end part of the inner side of the buckle is provided with a roller, and after the positioning device is inserted, the roller rolls on the outer wall of the positioning device, so that the friction force between the positioning device and the buckle does not influence the downward insertion of the positioning device.
Drawings
FIG. 1 is a schematic illustration of the structure of a constant section switching node of the present invention;
FIG. 2a is a schematic view of the structure of an open-pore steel pipe welded with vertical longitudinal ribs according to the present invention;
FIG. 2b is a front view of an apertured steel pipe welded with vertical longitudinal ribs according to the invention
FIG. 2c is a top view of an apertured steel tube of the invention welded with vertical longitudinal ribs;
FIG. 3a is a schematic view of the structure of the buckle of the present invention;
FIG. 3b is a schematic view of a buckle at another angle according to the present invention;
FIG. 3c is a side view of the clasp of the present invention;
FIG. 3d is a top view of the clasp of the present invention;
FIG. 4a is a schematic view of the clasp of the present invention when not inserted into a steel pipe;
FIG. 4b is a schematic view of the clasp of the present invention inserted into a steel pipe;
FIG. 5a is a schematic view of the positioning device of the present invention;
FIG. 5b is a front view of the positioning device of the present invention
FIG. 5c is a top view of the positioning device of the present invention;
FIG. 6a is a schematic view of the positioning device of the present invention without insertion;
Fig. 6b is a schematic view of the positioning device of the present invention after insertion.
Reference numerals illustrate: steel pipe concrete column 1, reinforced concrete column 2, trompil steel pipe 3, positioner 4, steel pipe 101, shear ring 102, vertical longitudinal bar 201, buckle 301, jack 3011, bolt 3012, spring 3013, columnar cavity 3014, roller 3015, trompil ring 401, thin wall steel pipe 402, slip casting pore 501, play thick liquid pore 502.
Detailed Description
The invention is further described below with reference to examples. The following examples are presented only to aid in the understanding of the invention. It should be noted that it will be apparent to those skilled in the art that modifications can be made to the present invention without departing from the principles of the invention, and such modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Example 1
As an embodiment, as shown in fig. 1 to 6b, the fabricated CFST-RC column constant section switching node comprises: the steel tube concrete column 1, the reinforced concrete column 2, the trompil steel tube 3 and positioner 4, steel tube concrete column 1 locates reinforced concrete column 2 top, and trompil steel tube 3 inserts in steel tube concrete column 1 and reinforced concrete column 2's connected node department.
As shown in fig. 1 to 2b, the reinforced concrete column 2 includes vertical longitudinal ribs 201, which meet the requirement of minimum reinforcement ratio, and the minimum distance between each vertical longitudinal rib 201 and the column axis is equal to the outer diameter of the perforated steel pipe 3, that is, each vertical longitudinal rib 201 is closely arranged along the circumferential direction of the perforated steel pipe 3, and the vertical longitudinal ribs 201 are welded with the outer surfaces of the perforated steel pipe 3. The extension length of the vertical longitudinal ribs 201 in the reinforced concrete column 2 is larger than the length of the top surface of the perforated steel pipe 3 extending into the concrete in the upper steel pipe concrete column 1, and the requirement of the minimum anchoring length is met, so that good adhesion between the concrete 1 in the steel pipe and the vertical longitudinal ribs 201 is ensured, and further good transmission of the internal force of the concrete 1 in the steel pipe concrete to the vertical longitudinal ribs 201 and the reinforced concrete column 2 at the lower part is ensured. The vertical longitudinal ribs 201 in the reinforced concrete column 2 are arranged at the interval center line position between the adjacent columns of the open-pore steel pipes 3 and welded at the corresponding positions of the open-pore steel pipes 3, so that the vertical longitudinal ribs 201 in the column are symmetrically arranged, the stress form of the structural column is good, the stability is strong, and the structural requirement can be met.
As shown in fig. 1, a plurality of rows of shear rings 102 are welded on the inner wall of the steel tube concrete column 1, and the interval distance between each two adjacent rows of shear rings 102 is equal.
The outer diameter of the perforated steel tube 3 is smaller than the inner diameters of the steel tube concrete column 1 and the reinforced concrete column 2, the perforated steel tube 3 and the steel tube concrete column 1 and the reinforced concrete column 2 are coaxially arranged, the reinforced concrete column 2 is poured first, the lower half part of the perforated steel tube 3 is poured in the reinforced concrete column 2, and the center section position of the perforated steel tube 3 is flush with the top surface of the reinforced concrete column 2.
As shown in fig. 6a and 6b, a plurality of layers of openings are formed at different heights on the upper half part of the perforated steel pipe 3, the adjacent two layers of openings are equally spaced, the plurality of openings of each layer are circumferentially arranged, the included angles between the adjacent openings are equal, and a buckle 301 is horizontally inserted into each opening. When the positioning device 4 is inserted into the perforated steel pipe 3, the buckle 301 is extruded from the inside of the perforated steel pipe 3 to the outside of the perforated steel pipe, and the outer end of the buckle 301 is inserted between the shear rings 102.
As shown in fig. 5a to 5c, the positioning device 4 comprises an open circular ring 401 and a thin-wall steel tube 402, wherein the outer diameter of the thin-wall steel tube 402 is slightly smaller than the inner diameter of the open steel tube 3, and the sections of the upper end and the lower end are perpendicular to the tube axis. The perforated circular ring 401 is fixed at the top end of the thin-wall steel pipe 402, the perforated circular ring 401 is made of steel, the outer diameter of the perforated circular ring 401 is slightly smaller than the diameter of the inner wall of the perforated steel pipe 3, a gap is left between the perforated circular ring 401 and the perforated circular ring, assembly is facilitated, the inner diameter of the perforated circular ring 401 is equal to or slightly larger than the inner diameter of the perforated steel pipe 3, and the perforated circular ring 401 can be clamped above the perforated steel pipe 3 after the positioning device 4 is inserted to the bottom; the perforated circular ring 401 is provided with fan-shaped perforated holes, and the included angles between the central lines of the adjacent fan-shaped perforated holes are equal, so that the vertical longitudinal ribs 201 can pass through and the concrete slurry can flow out.
Example two
As another embodiment, the second embodiment proposes, based on the first embodiment, a more specific assembled CFST-RC column constant-section conversion node, and the specific structure and use principle of the buckle 301 are as follows:
As shown in fig. 3a to 3d, the bottom of the buckle 301 is a plane, one end of the top facing the inside of the perforated steel pipe 3 is a downward slope, and one end of the top facing the outside of the perforated steel pipe 3 is a plane. The width of the upper and lower surfaces of the buckle 301 is equal and greater than the height of the side surfaces, and the height of the side surfaces is slightly smaller than the interval between every two adjacent shear rings 102, so that the buckle 301 cooperates with the positioning device 4 during assembly.
As shown in fig. 4a and fig. 4b, a plane area at the top of the buckle 301 is provided with an inserting hole 3011, a columnar cavity 3014 is arranged above the opening of the perforated steel pipe 3 corresponding to the inserting hole 3011, and the sectional area of the columnar cavity 3014 is far smaller than the width of the opening; a bolt 3012 is inserted into the columnar cavity 3014, and a spring 3013 is arranged between the top end of the bolt 3012 and the top end of the columnar cavity 3014; the bottom end of the bolt 3012 is wedge-shaped, one side of the insertion hole 3011 near the inner side of the perforated steel pipe 3 is an inclined surface. The outer surface of the wedge-shaped body at the lower part of the bolt 3012 is vertical, and the inner side is an inclined surface, so that the buckle 301 can be limited to be ejected outwards only, and the buckle 301 is at the initial position in the opening of the perforated steel pipe 3 and does not slide when the positioning device 4 is not extended yet. And the spring 3013 is initially pre-compressed so that the pin 3012 is relatively firmly pressed against the catch 301 by the pressure of the spring 3013 to avoid the pin 3012 from loosening when disturbed so that the catch 301 falls.
Before assembly, the wedge-shaped body at the lower part of the bolt 3012 extends out of the columnar cavity 3014 and is inserted into the jack 3011 reserved at the corresponding position of the upper surface of the outer side of the buckle 301, so that the buckle 301 is fixed at the initial position; in the assembly process, after the smooth inclined surface on the inner side of the buckle 301 contacts with the positioning device 4, the pin 3012 is pushed out of the jack 3011 and pushed into the columnar cavity 3014 along the inclined surface of the pin 3012, and meanwhile, the spring 3013 is forced to shrink until the buckle 301 pushes the pin 3012 out of the jack 3011 completely, and the bottom of the pin 3012 abuts against the upper surface of the buckle 301.
As shown in fig. 3a to 3d, a roller 3015 is disposed at the end of the inclined surface facing the inner side of the perforated steel pipe 3, the roller 3015 is in an embedded form, the outer surface of the end of the buckle 301 is smoothly connected with the roller 3015, only a small part of the end of the inner side of the buckle 301 is exposed, that is, the roller 3015 does not affect the process of inserting the positioning device 4 into the perforated steel pipe 3 to push the buckle 301 outwards, when the positioning device 4 is inserted into the perforated steel pipe 3, the outer wall of the positioning device 4 abuts against the roller 3015, when the positioning device 4 moves downwards, the roller 3015 rolls on the outer wall of the positioning device 4, so that the contact surface between the outer surface of the thin-wall steel pipe 402 and the inner side of the buckle 301 is gradually increased when the positioning device 4 is inserted, thereby causing difficulty in inserting the thin-wall steel pipe 402, and the inner side of the buckle 301 is worn to cause the problem of insufficient extension length. The roller 3015 is filled with lubricating oil in a gap with the buckle 301, so that the roller 3015 is prevented from being blocked when being contacted with the positioning device 4 due to large friction during rotation. Lubricating oil is coated between the buckle 301 and the opening of the open-pore steel pipe 3 and on the shear ring 102, so as to prevent excessive friction from being generated when the buckle 301 is ejected out and reaching a preset position.
It should be noted that, in this embodiment, the same or similar parts as those in the first embodiment may be referred to each other, and will not be described in detail in the present application.
Example III
As another embodiment, the third embodiment provides, based on the first and second embodiments, a construction method of the assembled CFST-RC column equal-section conversion node, including the following steps:
step one, binding a reinforcement cage of a reinforced concrete column 2 and arranging vertical longitudinal ribs 201;
step two, conveying the perforated steel pipe 3 prefabricated in a factory to a construction site, inserting the lower half part of the perforated steel pipe 3 into a pouring area of the reinforced concrete column 2 by using a scaffold or a hoisting device, and welding with the vertical longitudinal ribs 201;
And thirdly, supporting a mould and pouring the lower reinforced concrete column 2, pouring the lower half part of the perforated steel tube 3 into the lower reinforced concrete column 2, and reserving grouting pore canals 501 and grouting pore canals 502 which extend to the top surface of the reinforced concrete column 2.
One end of the grouting pore canal 501 is arranged on the side wall of the reinforced concrete column 2, the other end of the grouting pore canal 501 is arranged on the top surface of the reinforced concrete column 2, and the end part of the grouting pore canal 501 arranged on the top surface of the reinforced concrete column 2 is positioned on the outer side of the perforated steel pipe 3. One end of the grout outlet channel 502 is arranged at the top of the reinforced concrete column 2 at the inner side of the perforated steel pipe 3, and the other end of the grout outlet channel is arranged at the side wall of the reinforced concrete column 2 below the bottom end of the perforated steel pipe 3.
Step four, mounting the steel pipe 101 above the reinforced concrete column 2;
Step five, vertically inserting the positioning device 4 downwards from the top end of the steel pipe 101, sequentially contacting the positioning device 4 with a plurality of layers of buckles 301 from top to bottom, ejecting the buckles 301 outwards, and inserting the buckles into the corresponding shear ring 102 intervals; and (3) abutting the bottom end of the thin-wall steel tube 402 to the top surface of the reinforced concrete column 2 poured in the step (III), and finishing assembly.
Step six, grouting a cavity between the perforated steel pipe 3 and the steel pipe 101 through a grouting pore canal 501, when slurry stably flows out from an opening at one end of the side surface of the reinforced concrete column 2 of the grouting pore canal 502, closing the opening by adopting a baffle plate or a blocking hole plug, and when grouting material is poured onto the top end surface of the steel pipe 101, finishing pouring of the upper steel pipe concrete column 1 until maintenance is finished; and after the grouting material is coagulated and reaches the preset strength, removing the temporary support in construction, and completing the construction of the conversion node.
Example IV
As another embodiment, the fourth embodiment proposes, based on the third embodiment, a more specific construction method of the prefabricated CFST-RC column equal-section conversion node:
In the sixth step, grouting is performed from one end of the grouting duct 501 arranged on the side wall of the reinforced concrete column 2, slurry is injected from one end of the grouting duct 501 arranged on the top surface of the reinforced concrete column 2 into a cavity between the perforated steel pipe 3 and the steel pipe 101, internal gas is extruded from bottom to top, bubbles are avoided, the slurry overflows from the top end of the cavity between the perforated steel pipe 3 and the steel pipe 101 and then enters the perforated steel pipe 3, and a gap between the perforated steel pipe 3 and the positioning device 4 and the inside of the positioning device 4 are poured.
And after the slurry enters the perforated steel pipe 3, the slurry flows out from the side wall of the reinforced concrete column 2 through the slurry outlet channel 502, and when the slurry flow rate of the slurry flowing out from one end of the side wall of the reinforced concrete column 2 at which the slurry outlet channel 502 is formed is uniform, the slurry outlet channel 502 is plugged from one end of the side wall of the reinforced concrete column 2. After pouring, the grouting pore canal 501 is also plugged at one end opening arranged on the side wall of the reinforced concrete column 2, when the concrete reaches the preset strength, the reinforced concrete column 1 and the reinforced concrete column 2 are thoroughly connected together, and the grouting pore canal 501 and the grouting pore canal 502 in the reinforced concrete column 2 are filled with the concrete.
The grouting material is preferably non-shrinkage high-strength grouting material, has good self-fluidity, small aggregate and good self-tightness, does not need vibrating during grouting, and can avoid blocking grouting pore channels; meanwhile, the strength is high, and the bearing and deformation resistance of the structure can be obviously improved.
After the pouring grouting material is hardened and formed, the grouting material between each adjacent row of shear rings 201 can be similar to a plurality of short compression columns to bear shearing force together.
In this embodiment, the same or similar parts as those of the embodiment may be referred to each other, and will not be described in detail in the present disclosure.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by a difference from other embodiments, and identical and similar parts between the embodiments are referred to each other.
Claims (7)
1. An assembled CFST-RC column isopsection conversion node comprising: the device comprises a steel tube concrete column, a reinforced concrete column, an open-pore steel tube and a positioning device, wherein the steel tube concrete column is arranged above the reinforced concrete column, and the open-pore steel tube is inserted at a connecting node of the steel tube concrete column and the reinforced concrete column;
The lower half part of the perforated steel pipe is poured into the reinforced concrete column, a plurality of layers of holes are formed in the positions of the upper half part of the perforated steel pipe at different heights, a plurality of holes of each layer are annularly arranged, buckles are horizontally inserted into each hole, and a plurality of layers of shear rings are arranged on the inner wall of the steel pipe concrete column corresponding to the holes; when the positioning device is inserted into the perforated steel pipe, the buckle extends out of the perforated steel pipe from the inside of the perforated steel pipe and is inserted between the shearing rings.
2. The assembled CFST-RC column constant section conversion node according to claim 1, wherein the bottom of the buckle is a plane, one end of the top of the buckle, which faces the inner side of the perforated steel pipe, is a downward inclined plane, one end of the top of the buckle, which faces the outer side of the perforated steel pipe, is a plane, a jack is formed in the plane, a columnar cavity is formed above the perforated steel pipe, corresponding to the jack, a bolt is inserted in the columnar cavity, and a spring is arranged between the top end of the bolt and the top end of the columnar cavity; the bottom end of the bolt is wedge-shaped, steel pipe with jack close to open pore one side of the inner side is an inclined plane.
3. The fabricated CFST-RC column isopsection conversion node of claim 2, wherein the end of the inclined surface facing the inside of the perforated steel pipe is provided with a roller, the outer wall of the positioning device abuts against the roller when the positioning device is inserted into the perforated steel pipe, and the roller rolls on the outer wall of the positioning device when the positioning device moves downward.
4. The fabricated CFST-RC column isopsection conversion node of claim 1, wherein the reinforced concrete column comprises a vertical longitudinal rib, the vertical longitudinal rib being welded to the outer surface of the perforated steel pipe; the positioning device comprises an open pore circular ring and a thin-wall steel pipe, wherein the outer diameter of the thin-wall steel pipe is smaller than or equal to the inner wall of the open pore steel pipe, the open pore circular ring is fixed at the top end of the thin-wall steel pipe, and an open pore is formed in the open pore circular ring and used for allowing vertical longitudinal ribs to pass through and concrete slurry to flow out.
5. A method of constructing a fabricated CFST-RC column isopsection transition node according to any one of claims 1 to 4, comprising the steps of:
binding a reinforced concrete column reinforcement cage and arranging vertical longitudinal ribs;
inserting the lower half part of the perforated steel pipe into a reinforced concrete column pouring area, and welding with the vertical longitudinal ribs;
Thirdly, supporting a mould and pouring a reinforced concrete column, pouring the lower half part of the perforated steel pipe into the reinforced concrete column, and reserving a grouting pore canal extending to the top surface of the reinforced concrete column;
step four, mounting the steel pipe above the reinforced concrete column;
step five, vertically inserting the positioning device downwards from the top end of the steel pipe, sequentially contacting the positioning device with a plurality of layers of buckles from top to bottom, ejecting the buckles outwards, and inserting the buckles into the corresponding shear ring intervals;
Step six, grouting the cavity between the perforated steel pipe and the steel pipe through the grouting pore canal, overflowing the slurry from the top of the positioning device, flowing into the perforated steel pipe, and pouring the slurry until the slurry reaches the top end face of the steel pipe, thereby completing the construction of the conversion node.
6. The construction method of the fabricated CFST-RC column constant section conversion node according to claim 5, wherein one end of the grouting duct is arranged on the side wall of the reinforced concrete column, the other end of the grouting duct is arranged on the top surface of the reinforced concrete column, and the end of the grouting duct arranged on the top surface of the reinforced concrete column is arranged on the outer side of the perforated steel pipe, in the step six, grouting is carried out from one end of the grouting duct arranged on the side wall of the reinforced concrete column, grouting is carried out from one end of the grouting duct arranged on the top surface of the reinforced concrete column to a cavity between the perforated steel pipe and the steel pipe, and after the grouting overflows from the top end of the cavity between the perforated steel pipe and the steel pipe, the grouting enters the perforated steel pipe, and a gap between the perforated steel pipe and the positioning device and the inside of the positioning device are poured.
7. The construction method of the assembled CFST-RC column constant section conversion node according to claim 6, wherein in the third step, a grout outlet channel is reserved in the casting process of the reinforced concrete column, one end of the grout outlet channel is formed in the top of the reinforced concrete column on the inner side of the perforated steel pipe, and the other end of the grout outlet channel is formed in the side wall of the reinforced concrete column below the bottom end of the perforated steel pipe; and step six, the slurry overflows from the top end of the cavity between the perforated steel pipe and the steel pipe, flows out of the side wall of the reinforced concrete column through the slurry outlet channel after entering the perforated steel pipe, and plugs the slurry outlet channel from one end of the side wall of the reinforced concrete column after the slurry flow velocity of the slurry flowing out of one end of the side wall of the reinforced concrete column of the slurry outlet channel is uniform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410892140.8A CN118704607B (en) | 2024-07-04 | 2024-07-04 | An assembled CFST-RC column equal-section conversion node and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410892140.8A CN118704607B (en) | 2024-07-04 | 2024-07-04 | An assembled CFST-RC column equal-section conversion node and its construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118704607A true CN118704607A (en) | 2024-09-27 |
| CN118704607B CN118704607B (en) | 2025-10-03 |
Family
ID=92808644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410892140.8A Active CN118704607B (en) | 2024-07-04 | 2024-07-04 | An assembled CFST-RC column equal-section conversion node and its construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118704607B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150075432A (en) * | 2013-12-25 | 2015-07-06 | 주식회사 포스코 | Connectong structure of steel tube and foundation pile |
| KR101549088B1 (en) * | 2015-01-13 | 2015-09-03 | 한우물중공업(주) | Steel-Concrete Composite Pipe and the Connection Structure |
| CN108301561A (en) * | 2018-01-02 | 2018-07-20 | 重庆大学 | A kind of connection structure of assembly concrete-filled steel tube shaft |
| CN209989954U (en) * | 2019-02-28 | 2020-01-24 | 清华大学 | Conversion node of upper steel pipe column and lower floor reinforced concrete column |
| CN111502126A (en) * | 2020-04-24 | 2020-08-07 | 华北理工大学 | Built-in sleeve grouting connection steel pipe concrete composite column and construction method thereof |
| CN115341714A (en) * | 2022-08-03 | 2022-11-15 | 浙江大学建筑设计研究院有限公司 | Fabricated hybrid beam with steel pipe concrete structure as connecting node and method |
-
2024
- 2024-07-04 CN CN202410892140.8A patent/CN118704607B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150075432A (en) * | 2013-12-25 | 2015-07-06 | 주식회사 포스코 | Connectong structure of steel tube and foundation pile |
| KR101549088B1 (en) * | 2015-01-13 | 2015-09-03 | 한우물중공업(주) | Steel-Concrete Composite Pipe and the Connection Structure |
| CN108301561A (en) * | 2018-01-02 | 2018-07-20 | 重庆大学 | A kind of connection structure of assembly concrete-filled steel tube shaft |
| CN209989954U (en) * | 2019-02-28 | 2020-01-24 | 清华大学 | Conversion node of upper steel pipe column and lower floor reinforced concrete column |
| CN111502126A (en) * | 2020-04-24 | 2020-08-07 | 华北理工大学 | Built-in sleeve grouting connection steel pipe concrete composite column and construction method thereof |
| CN115341714A (en) * | 2022-08-03 | 2022-11-15 | 浙江大学建筑设计研究院有限公司 | Fabricated hybrid beam with steel pipe concrete structure as connecting node and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN118704607B (en) | 2025-10-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108547216B (en) | Bridge precast concrete pier column and bridge foundation tooth key socket structure and construction method | |
| CN110792164B (en) | A kind of horizontal assembly device and assembly method of prefabricated shear wall | |
| CN119640783A (en) | Prefabricated pile, combined pile and construction method | |
| CN118704607B (en) | An assembled CFST-RC column equal-section conversion node and its construction method | |
| CN113512935B (en) | Temporary connection structure of prefabricated spliced bridge and prefabricated beam section | |
| CN210216126U (en) | Pier connection structure is assembled in prefabricated section of cutting | |
| CN112854283B (en) | A truncated cone connection structure of a pile-column structure passing through a structural bottom plate and its construction method | |
| CN219863686U (en) | Grouting-free branch pipe reducing splayed guide port half grouting steel bar connecting sleeve | |
| CN212129721U (en) | Fully-prefabricated combined stair | |
| CN211691081U (en) | Self-extrusion fixed grouting sleeve for double parallel ribs connection | |
| CN205223838U (en) | Prefabricating bridge pier stand and cushion cap socket joint and slot built -up connection structure | |
| CN113235732A (en) | Construction method of prefabricated conversion beam and prefabricated column connection node on beam and connection point structure of prefabricated conversion beam and prefabricated column connection node | |
| CN217751940U (en) | Prefabricated part mold assembly | |
| CN112031235B (en) | Prefabricated cast-in-place concrete floor | |
| CN110284659A (en) | It is a kind of for double and muscle connect can the fixed grout sleeve of self compaction | |
| CN115324196B (en) | Low-layer assembled concrete structure system | |
| CN216892364U (en) | Variable cross-section steel pipe static pressure pile structure for foundation reinforcement | |
| CN216893504U (en) | Pore-forming device of prestressing force steel beam preformed hole | |
| CN208152011U (en) | Prefabricated prestressed underground continuous wall | |
| CN212671004U (en) | Preliminary Structural Columns, Stepped Interface Structural Columns and Formwork for Step Surfaces | |
| CN223793751U (en) | A prefabricated floor slab structure | |
| CN116043999B (en) | A dry-connected fully assembled concrete frame structure system and assembly method | |
| CN110284660A (en) | It is a kind of in a row three and muscle connection can the fixed grout sleeve of self compaction | |
| CN221193824U (en) | Prefabricated wall and prefabricated wall connection node | |
| CN119616073B (en) | A PEC column vertical connection structure that does not require casting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |