An assembled precast pipe column shear connection structure and its construction method

Abstract

The present invention discloses an assembled prefabricated pipe column shear-resistant connection structure, comprising: a prefabricated upper column and a prefabricated lower column; the prefabricated upper column comprises: a concrete upper column, an upper sleeve and an upper connecting piece; the prefabricated lower column comprises: a concrete lower column, a lower sleeve and a shear-resistant piece; the shear-resistant piece comprises: a conical tube body, a connecting pipe and a plurality of anchoring steel bars; a plurality of first lower studs extending radially are fixedly provided on the surface of the conical tube body; a plurality of second lower studs extending away from the center of the connecting pipe are fixedly provided on the surface of the connecting pipe. The present invention also provides a construction method for an assembled prefabricated pipe column shear-resistant connection structure. The present invention enhances the ability to dissipate seismic energy at the connection node and enhances the reliability of the connection node; the studs on the surface of the shear-resistant piece increase the contact area between the shear-resistant piece and the concrete and can produce a shear-resistant effect, thereby enhancing the shear resistance and connection reliability between the prefabricated upper column and the shear-resistant piece, and further improving the mechanical properties of the connection node.

Description

Technical Field

[0001] The present invention belongs to the technical field of assembled concrete buildings, and in particular relates to an assembled prefabricated pipe column shear-resistant connection structure and a construction method thereof. Background Art

[0002] Prefabricated buildings are characterized by energy conservation, environmental protection, shortened construction periods, and improved quality. Prefabricated frame structures are a common structural system for prefabricated buildings. Compared to traditional cast-in-place frame systems, prefabricated frame structures feature separate beam-column joints and column-column connections. The quality of these joint connections significantly impacts the safety of the frame structure. Joint connections must not only ensure safety but also balance cost-effectiveness and convenience.

[0003] Traditional cast-in-place frame columns require formwork support during the pouring process, resulting in large volumes of cast-in-place concrete, long construction cycles, and challenging quality assurance. Traditional prefabricated frame structures utilize solid concrete columns as vertical components, which are heavy and subject to limitations in lifting equipment, resulting in high lifting costs. Furthermore, as the columns are the primary load-bearing components of the frame structure, they contain numerous longitudinal reinforcements, making on-site connections complex and significantly impacting both construction speed and quality.

[0004] According to whether wet work is required on site, the connection methods of the nodes can be divided into wet connection, dry connection and dry-wet combination connection. At present, the common vertical connection methods of prefabricated concrete structures include grouting sleeve connection, grouting anchor lap connection, mechanical connection, etc. Among them, the grouting sleeve connection is to insert ribbed steel bars into the metal sleeve and inject grouting material, and realize the transmission of force through the hardening of the mixture to achieve the butt connection of the steel bars. This connection method has the advantages of reducing the workload of steel bar pre-processing and not generating secondary stress and deformation during on-site construction, especially in high-rise buildings in seismic fortification areas. However, during the current construction process on the construction site, the connection quality of the sleeve grouting is not easy to guarantee, and the grouting fullness and strength may be insufficient. If only the grouting sleeve connection method is used, the connection reliability is insufficient, which may cause safety hazards to the prefabricated column-to-column connection nodes and reduce the overall seismic resistance of the structure. Summary of the Invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides an assembled prefabricated pipe column shear-resistant connection structure and a construction method thereof. The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0006] A first aspect of an embodiment of the present invention provides an assembled prefabricated pipe column shear-resistant connection structure, comprising: a prefabricated upper column and a prefabricated lower column;

[0007] The prefabricated upper column comprises: a concrete upper column, an upper sleeve and an upper connecting piece;

[0008] The upper connecting piece is in the shape of a tapered tube;

[0009] The upper sleeve and the upper connector are both inserted into the concrete upper column, and one end of the upper sleeve close to the grouting sleeve of the concrete upper column is fixedly connected to and communicates with the first end of the upper connector; the diameter of the first end of the upper connector is smaller than the diameter of the second end of the upper connector;

[0010] The prefabricated lower column comprises: a concrete lower column, a lower sleeve and a shear member;

[0011] The shear-resistant member comprises: a tapered tube body, a connecting tube and a plurality of anchoring steel bars;

[0012] The conical tube body has one end fixedly connected to and communicated with one end of the connecting tube, and the other end fixedly connected to one end of the anchoring steel bar and sleeved on one end of the lower sleeve;

[0013] A plurality of first lower pegs extending in the radial direction are fixedly provided on the surface of the conical tube;

[0014] The lower sleeve and the tapered tube are both inserted into the lower concrete column; the connecting pipe is located outside the lower concrete column;

[0015] The diameter of one end of the tapered tube is smaller than the diameter of the other end of the tapered tube;

[0016] A plurality of second lower bolts extending away from the center of the connecting pipe are fixedly provided on the surface of the connecting pipe; the connecting pipe is inserted into the upper connecting piece from the second end of the upper connecting piece; the lower longitudinal reinforcement located on the outside of the concrete lower column is inserted into the grouting sleeve.

[0017] In one embodiment of the present invention, a plurality of first lower pegs are sequentially spaced apart in the circumferential direction of the cross section of the tapered tube;

[0018] Two adjacent first lower pegs located on different cross sections of the tapered tube are located in the circumferential direction of the same longitudinal section of the tapered tube.

[0019] In one embodiment of the present invention, a plurality of second lower pegs are sequentially spaced apart in a circumferential direction of a cross section of the connecting pipe;

[0020] The two adjacent second lower pegs located on different cross sections of the connecting pipe are located in the circumferential direction of the same longitudinal section of the connecting pipe.

[0021] In one embodiment of the present invention, one end of the anchor steel bar is fixedly connected to the other end of the tapered tube body, and the other end extends away from the tapered tube body.

[0022] In one embodiment of the present invention, the concrete upper column comprises: an upper concrete base column, a plurality of upper longitudinal reinforcements, upper spiral stirrups and a plurality of the grouting sleeves;

[0023] The upper sleeve and the upper connecting piece are both inserted into the upper concrete base column;

[0024] The plurality of upper longitudinal bars are inserted into the upper concrete column and are sequentially spaced along the circumferential direction of the upper concrete column; one end of the upper longitudinal bar is inserted into one end of the grouting sleeve;

[0025] The upper spiral stirrups are wrapped around the plurality of upper longitudinal bars and the plurality of grouting sleeves;

[0026] The grouting sleeve is located in the upper concrete foundation column.

[0027] In one embodiment of the present invention, the concrete lower column comprises: a lower concrete base column, a plurality of the lower longitudinal bars and lower spiral stirrups;

[0028] The lower sleeve and the tapered tube are both inserted into the lower concrete column; the connecting pipe is located outside the lower concrete column;

[0029] The lower longitudinal reinforcement is passed through the lower concrete column, and one end of the lower longitudinal reinforcement is located outside the lower concrete column;

[0030] The plurality of lower longitudinal reinforcements are sequentially spaced apart along the circumferential direction of the lower concrete column;

[0031] One end of the lower longitudinal reinforcement is inserted into the other end of the grouting sleeve;

[0032] The lower spiral stirrups surround the plurality of lower longitudinal bars.

[0033] A second aspect of the embodiments of the present invention provides a construction method for an assembled prefabricated pipe column shear-resistant connection structure, which is applied to the assembled prefabricated pipe column shear-resistant connection structure described in the first aspect of the embodiments of the present invention, comprising the following steps:

[0034] Step 1: Make an upper sleeve, an upper connecting piece, a lower sleeve and a shear member, and connect the upper sleeve and the upper connecting piece;

[0035] Step 2: pre-embed the upper sleeve and the upper connector and produce a concrete upper column to form a prefabricated upper column, and pre-embed the lower sleeve and the shear member and produce a concrete lower column to form a prefabricated lower column;

[0036] Step 3: Use a hoist to lift the prefabricated upper column, insert the lower longitudinal reinforcement of the concrete lower column into the grouting sleeve of the concrete upper column, and at the same time, insert the connecting pipe into the upper connecting piece;

[0037] Step 4: Grouting the grouting sleeve and post-pour concrete on the upper sleeve and the lower sleeve to complete the connection between the prefabricated upper column and the prefabricated lower column.

[0038] Beneficial effects of the present invention:

[0039] The present invention improves the reliability of the column-to-column connection through the simultaneous action of the grouting sleeve and the shear member. The contact between the conical tube body and the concrete lower column increases the contact area between the steel material and the concrete, thereby increasing the friction, enhancing the ability of the connection node to dissipate seismic energy, and enhancing the reliability of the connection node; moreover, when the concrete is poured later, the concrete enters the conical tube body and downward into the lower sleeve more smoothly and flows downward more easily, thereby improving construction efficiency. At the same time, during the post-pouring concrete process, when the concrete is filled from bottom to top, it is not easy to form a casting dead angle in the conical tube body, avoiding the formation of hollows, and further increasing the reliability of the connection node.

[0040] In addition, the studs on the surface of the shear member increase the contact area between the shear member and the concrete, and can produce a shear effect, thereby increasing the bond strength and mechanical bite force between the shear member and the concrete, and improving the anchoring performance of the shear member, thereby improving the mechanical properties of the column-to-column connection node; the grouting material in the grouting sleeve can enter between the upper connecting member and the connecting pipe from the lower end of the grouting sleeve, and through the action between the second lower stud and the grouting material, the shear performance and connection reliability between the prefabricated upper column and the shear member are enhanced, and the mechanical properties at the connection node are further improved.

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic structural diagram of a prefabricated upper column provided in an embodiment of the present invention;

[0043] Figure 2 A schematic structural diagram of a prefabricated lower column provided in an embodiment of the present invention;

[0044] Figure 3 A schematic structural diagram of a shear member provided in an embodiment of the present invention;

[0045] Figure 4 A schematic diagram of the assembly structure of the prefabricated upper column and prefabricated lower column provided in an embodiment of the present invention;

[0046] Figure 5 A schematic diagram of the overall structure of the prefabricated upper column and prefabricated lower column provided in an embodiment of the present invention.

[0047] Description of reference numerals:

[0048] 10-concrete upper column; 11-upper sleeve; 12-upper connector; 13-grouting sleeve; 14-upper concrete base column; 15-upper longitudinal reinforcement; 16-upper spiral stirrups; 20-concrete lower column; 21-lower sleeve; 22-conical tube; 23-connecting pipe; 24-anchor steel bar; 25-first lower stud; 26-second lower stud; 27-lower concrete base column; 28-lower longitudinal reinforcement; 29-lower spiral stirrups. DETAILED DESCRIPTION

[0049] The present invention will be further described in detail below with reference to specific examples, but the embodiments of the present invention are not limited thereto.

[0050] Example 1

[0051] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, a first aspect of an embodiment of the present invention provides an assembled prefabricated pipe column shear-resistant connection structure, comprising: a prefabricated upper column and a prefabricated lower column;

[0052] The prefabricated upper column comprises: a concrete upper column 10, an upper sleeve 11 and an upper connecting piece 12;

[0053] The upper connecting piece 12 is in the shape of a tapered tube; the upper sleeve 11 and the upper connecting piece 12 are both inserted into the concrete upper column 10, the upper sleeve 11 is vertically inserted into the concrete upper column 10, and one end of the upper sleeve 11 close to the grouting sleeve 13 of the concrete upper column 10 is fixedly connected and communicated with the first end of the upper connecting piece 12; the diameter of the first end of the upper connecting piece 12 is smaller than the diameter of the second end of the upper connecting piece 12; the upper sleeve 11 and the upper connecting piece 12 are an integrally formed structure, and are both located in the concrete upper column 10.

[0054] Prefabricated lower column, including: concrete lower column 20, lower sleeve 21 and shear member;

[0055] The shear member includes: a tapered tube body 22, a connecting tube 23 and a plurality of anchoring steel bars 24;

[0056] One end of the conical tube body 22 is fixedly connected to and communicates with one end of the connecting tube 23, and the other end of the conical tube body 22 is fixedly connected to one end of the anchoring steel bar 24 and is sleeved on one end of the lower sleeve 21. The diameter of one end of the conical tube body 22 is smaller than the diameter of the other end of the conical tube body 22;

[0057] Both the lower sleeve 21 and the tapered tube 22 are inserted into the concrete lower column 20. The lower sleeve 21 is inserted vertically into the concrete lower column 20, while the connecting tube 23 is located outside the concrete lower column 20. The diameter of the connecting tube 23 is smaller than the diameter of the second end of the upper connector 12. The connecting tube 23 passes through the second end of the upper connector 12 into the upper connector 12. The lower longitudinal reinforcement 28 located outside the concrete lower column 20 is inserted into the grouting sleeve 13.

[0058] In this embodiment, grouting sleeves 13 and shear members are used simultaneously for column-to-column connections, improving the reliability of the column-to-column connection. Specifically, the contact between the tapered tube 22 and the concrete lower column 20 increases the contact area between the steel and concrete, thereby increasing friction, enhancing the ability of the connection node to dissipate seismic energy, and improving the reliability of the connection node.

[0059] Furthermore, when pouring concrete, compared to pouring concrete directly into the lower column sleeve with a funnel-shaped lower end, the cross-sectional area of the concrete gradually increases as it enters the tapered tube 22 and flows downward into the lower sleeve 21, making the concrete flow smoother and easier to flow downward, thereby improving construction efficiency. Furthermore, during the post-pour concrete process, as the concrete is filled from bottom to top, the tapered tube 22 as a whole does not have any right-angled corners, making it difficult to form casting dead corners within the tapered tube 22 (particularly at the upper end of the tapered tube 22), thus avoiding the formation of hollows and further increasing the reliability of the connection nodes.

[0060] A plurality of radially extending first lower pegs 25 are fixedly mounted on the surface of the tapered tube 22 and are located within the concrete lower column 20. A plurality of second lower pegs 26 are fixedly mounted on the surface of the connecting tube 23, extending away from the center of the connecting tube 23. The upper sleeve 11, upper connector 12, lower sleeve 21, and shear members are all made of steel.

[0061] In this embodiment, the steel studs on the surface of the shear member increase the contact area between the shear member and the concrete, increasing the friction between them and generating a shearing effect. This increases the bond strength and mechanical bite between the shear member and the concrete, improving the anchoring performance of the shear member, and thus improving the mechanical properties of the column-to-column connection. Simultaneously, the grouting material within the grouting sleeve 13 can enter from the lower end of the grouting sleeve 13 between the upper connector 12 and the connecting tube 23. The interaction between the second lower studs 26 and the grouting material increases the bond strength and mechanical bite between the shear member and the grouting material, enhancing the shear resistance and connection reliability between the prefabricated upper column and the shear member, and further improving the mechanical properties of the connection node. The upper connector 12 is a tapered tube shape, which facilitates the insertion of the connecting tube 23 and facilitates centering of the prefabricated upper and lower columns during assembly.

[0062] In this embodiment, the column-to-column connection features multiple safeguards. The column edges are connected using grouting sleeves 13, while the center utilizes steel stud shear members. The hollow space within the sleeves is then filled with post-cast concrete, thereby forming a single unit. The shear members transmit longitudinal and shear forces, while the surface-mounted steel studs enhance the connection between the shear members and the post-cast concrete, thereby improving the mechanical properties of the column-to-column connection.

[0063] In this embodiment, the prefabricated upper column and the prefabricated lower column are prefabricated hollow formwork components, which have the advantage of light weight and are easy to transport and install. The shear members can be pre-buried in the upper part of the prefabricated lower column and prefabricated in the factory. The quality of the components is easy to ensure, and the installation position of the shear members is controllable.

[0064] Preferably, if Figure 3 As shown, a plurality of first lower pegs 25 are sequentially spaced apart in the circumferential direction of the cross section of the tapered tube 22. Two adjacent first lower pegs 25 located on different cross sections of the tapered tube 22 are located in the circumferential direction of the longitudinal section of the same tapered tube 22. The plurality of first lower pegs 25 have the same length.

[0065] A plurality of second lower pegs 26 are sequentially spaced apart in the circumferential direction of the cross section of the connecting tube 23. Two adjacent second lower pegs 26 located on different cross sections of the connecting tube 23 are located circumferentially of the same longitudinal section of the connecting tube 23. The lengths of the plurality of second lower pegs 26 gradually decrease from one end of the connecting tube 23 to the other.

[0066] The first lower studs 25 and the second lower studs 26 are evenly arranged, so that the shear members are evenly stressed and the earthquake energy can be evenly dissipated, further improving the reliability of the column-to-column connection.

[0067] Furthermore, if Figure 3 As shown, one end of the anchor steel bar 24 is fixedly connected to the other end of the tapered tube 22, and the other end of the anchor steel bar 24 extends away from the tapered tube 22. Multiple anchor steel bars 24 are arranged along the circumferential direction of the tapered tube 22, and the anchor steel bars 24 improve the anchoring performance between the shear member and the concrete.

[0068] Preferably, if Figure 4 and Figure 5 As shown, the concrete upper column 10 includes: an upper concrete base column 14, a plurality of upper longitudinal reinforcements 15, an upper spiral stirrup 16 and a plurality of grouting sleeves 13;

[0069] The upper sleeve 11 and upper connector 12 are both inserted into the upper concrete column 14. Multiple upper longitudinal bars 15 are inserted into the upper concrete column 14 and spaced sequentially along the circumference of the column. One end of each upper longitudinal bar 15 is inserted into one end of the grouting sleeve 13. Upper spiral stirrups 16 surround the upper longitudinal bars 15 and the grouting sleeves 13. The grouting sleeve 13 is located in the upper concrete column 14. The upper sleeve 11 is located in the middle of the upper concrete column 14. Multiple upper longitudinal bars 15 surround the upper sleeve 11 and upper connector 12. Upper spiral stirrups 16 bind all the upper longitudinal bars 15 together.

[0070] The concrete lower column 20 includes a lower concrete base column 27 , a plurality of lower longitudinal reinforcements 28 and lower spiral stirrups 29 .

[0071] The lower sleeve 21 and the tapered tube body 22 are both inserted into the lower concrete base column 27 , the first bolt 25 is located in the lower concrete base column 27 ; and the connecting pipe 23 is located outside the lower concrete base column 27 .

[0072] One end of the lower longitudinal reinforcement 28 is located outside the lower concrete column 27. The lower longitudinal reinforcement 28 is inserted into the lower concrete column 27, and multiple lower longitudinal reinforcements 28 are sequentially spaced along the circumference of the lower concrete column 27. One end of the lower longitudinal reinforcement 28 is inserted into the other end of the grouting sleeve 13. Lower spiral stirrups 29 surround the multiple lower longitudinal reinforcements 28. The multiple lower longitudinal reinforcements 28 surround the lower sleeve 21 and the shear member, and the lower spiral stirrups 29 bind all the lower longitudinal reinforcements 28.

[0073] Example 2

[0074] A second aspect of an embodiment of the present invention provides a construction method for an assembled prefabricated pipe column shear-resistant connection structure, which is applied to the assembled prefabricated pipe column shear-resistant connection structure of the first aspect of an embodiment of the present invention, comprising the following steps:

[0075] Step 1: Make the upper sleeve 11, the upper connecting piece 12, the lower sleeve 21 and the shear member, and connect the upper sleeve 11 and the upper connecting piece 12.

[0076] In this step, the specific manufacturing process of the shear member is as follows: welding the conical tube body 22 and the connecting tube 23, and welding the first lower stud 25 and the second lower stud 26 on the outer surface of the conical tube body 22 and the connecting tube 23, and welding the anchor steel bar 24 at the lower part of the conical tube body 22 to complete the manufacturing.

[0077] Step 2: Make a prefabricated pipe column: pre-embed the upper sleeve 11 and the upper connecting part 12 and produce a concrete upper column 10 to form a prefabricated upper column, and pre-embed the lower sleeve 21 and the shear member and produce a concrete lower column 20 to form a prefabricated lower column, ensuring that the pre-embedded shear member is in the center position of the concrete lower column 20.

[0078] Step 3, on-site installation: Use a hoist to hoist the prefabricated upper column, so that the lower longitudinal reinforcement 28 of the concrete lower column 20 is inserted into the grouting sleeve 13 of the concrete upper column 10, and at the same time, the connecting pipe 23 is inserted into the upper connecting piece 12. Pay attention to alignment during the hoisting process.

[0079] Step 4: Post-cast concrete and grouting connection: grouting operation is performed on the grouting sleeve 13, and post-cast concrete operation is performed on the upper sleeve 11 and the lower sleeve 21 to complete the connection between the prefabricated upper column and the prefabricated lower column.

[0080] In this embodiment, the shear member as a node load-bearing member must ensure manufacturing quality, have sufficient precision and strength, and have a sufficient diameter so that concrete can be poured smoothly from top to bottom.

[0081] The longitudinal reinforcement and the grouting sleeve 13 must be embedded accurately to ensure that the grouting sleeve 13 device can be connected normally.

[0082] The studs must be firmly connected to the tapered pipe body 22 and the connecting pipe 23, and the number and length of the studs must be sufficient to increase the contact area with the high-strength grouting material and concrete, so as to achieve the effect of studs and shear members working in coordination.

[0083] The production quality of prefabricated upper columns and prefabricated lower columns must be guaranteed, and the installation accuracy must be controlled during hoisting to ensure the normal installation of the upper and lower pipe columns.

[0084] Conventional grouting sleeve 13 operation is a concealed project and its quality is not easy to guarantee. However, the grouting sleeve 13 in the present invention is an external leakage operation, which is convenient for grouting and easy to check the sleeve quality at a later stage, which helps to ensure the safety of the node.

[0085] The upper and lower columns of the present invention adopt a combined connection method of grouting sleeve 13 + steel shear member + post-cast concrete, which provides multiple protections for the column-column nodes, significantly improves the compression, bending and shear resistance of the nodes, and complies with the design concept of "strong nodes, weak components".

[0086] The studs welded on the surface of the shear member of the present invention can improve the anchoring performance of the steel shear member and increase the bond strength between the concrete and the studs, thereby improving the coordinated work between the shear member and the post-cast concrete. In addition, the steel studs are easy to manufacture and have low cost, which is conducive to promotion.

[0087] This invention solves the problems of difficult positioning and extensive wet work during conventional pipe string connections, while also improving the shear resistance of pipe string joints. As long as the quality and precision of the steel shear members and upper and lower pipe strings are ensured in the factory, they can be quickly installed on-site, reducing the requirements for on-site construction personnel. The installation process does not require extensive wet work, improving construction efficiency and shortening the construction period.

[0088] The present invention has the characteristics of safety and reliability, convenient construction, rapid installation and clear force transmission path.

[0089] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0090] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0091] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0092] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0093] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0094] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. An assembled prefabricated pipe column shear connection structure, characterized in that: include: Precast upper columns and precast lower columns; The prefabricated upper column comprises: a concrete upper column (10), an upper sleeve (11) and an upper connecting piece (12); The concrete upper column (10) comprises: an upper concrete base column (14), a plurality of upper longitudinal bars (15), upper spiral stirrups (16) and a plurality of grouting sleeves (13); the upper sleeve (11) and the upper connecting member (12) are both inserted into the upper concrete base column (14); the plurality of upper longitudinal bars (15) are inserted into the upper concrete base column (14) and are sequentially spaced along the circumferential direction of the upper concrete base column (14); one end of the upper longitudinal bar (15) is inserted into one end of the grouting sleeve (13); the upper spiral stirrups (16) are wrapped around the plurality of upper longitudinal bars (15) and the plurality of grouting sleeves (13); the grouting sleeve (13) is located in the upper concrete base column (14); The upper connecting piece (12) is in the shape of a tapered tube; the upper sleeve (11) and the upper connecting piece (12) are both inserted into the concrete upper column (10); one end of the upper sleeve (11) close to the grouting sleeve (13) of the concrete upper column (10) is fixedly connected to and communicated with the first end of the upper connecting piece (12); the diameter of the first end of the upper connecting piece (12) is smaller than the diameter of the second end of the upper connecting piece (12); The prefabricated lower column comprises: a concrete lower column (20), a lower sleeve (21) and a shear member; The shear-resistant member comprises: a tapered tube body (22), a connecting tube (23) and a plurality of anchoring steel bars (24); The conical tube body (22) has one end fixedly connected to and in communication with one end of the connecting tube (23), and the other end fixedly connected to one end of the anchoring steel bar (24) and sleeved on one end of the lower sleeve (21); The diameter of one end of the tapered tube (22) is smaller than the diameter of the other end of the tapered tube (22); The lower sleeve (21) and the tapered tube body (22) are both inserted into the concrete lower column (20); the connecting pipe (23) is located outside the concrete lower column (20); the connecting pipe (23) is inserted into the upper connecting member (12) from the second end of the upper connecting member (12); the lower longitudinal reinforcement (28) located outside the concrete lower column (20) is inserted into the grouting sleeve (13); A plurality of first lower pegs (25) extending in the radial direction are fixedly provided on the surface of the conical tube body (22); a plurality of second lower pegs (26) extending away from the center of the connecting tube (23) are fixedly provided on the surface of the connecting tube (23); The concrete lower column (20) comprises: a lower concrete base column (27), a plurality of lower longitudinal bars (28) and lower spiral stirrups (29); the lower sleeve (21) and the tapered tube body (22) are both inserted into the lower concrete base column (27); the connecting pipe (23) is located outside the lower concrete base column (27); the lower longitudinal bars (28) are inserted into the lower concrete base column (27), and one end of the lower longitudinal bars (28) is located outside the lower concrete base column (27); a plurality of lower longitudinal bars (28) are sequentially spaced along the circumferential direction of the lower concrete base column (27); one end of the lower longitudinal bar (28) is inserted into the other end of the grouting sleeve (13); and the lower spiral stirrups (29) surround the plurality of lower longitudinal bars (28).

2. The prefabricated pipe column shear connection structure according to claim 1, characterized in that: A plurality of first lower pegs (25) are sequentially spaced in a circumferential direction of the cross section of the tapered tube (22); Two adjacent first lower pegs (25) located on different cross sections of the tapered tubular body (22) are located in the circumferential direction of the longitudinal section of the same tapered tubular body (22).

3. The assembled prefabricated pipe column shear connection structure according to claim 2, characterized in that: A plurality of second lower bolts (26) are sequentially spaced apart in the circumferential direction of the cross section of the connecting pipe (23); Two adjacent second lower bolts (26) located on different cross sections of the connecting tube (23) are located in the circumferential direction of the longitudinal section of the same connecting tube (23).

4. The assembled prefabricated pipe column shear connection structure according to claim 3, characterized in that: One end of the anchoring steel bar (24) is fixedly connected to the other end of the tapered tube body (22), and the other end extends away from the tapered tube body (22).

5. A construction method for an assembled prefabricated pipe column shear connection structure, characterized in that: The assembled prefabricated pipe column shear connection structure according to any one of claims 1 to 4 comprises the following steps: Step 1: Make an upper sleeve (11), an upper connecting piece (12), a lower sleeve (21) and a shear member, and connect the upper sleeve (11) and the upper connecting piece (12); Step 2: pre-embedding the upper sleeve (11) and the upper connector (12) and producing a concrete upper column (10) to form a prefabricated upper column, and pre-embedding the lower sleeve (21) and the shear member and producing a concrete lower column (20) to form a prefabricated lower column; Step 3: Use a hoist to hoist the prefabricated upper column, so that the lower longitudinal reinforcement (28) of the concrete lower column (20) is inserted into the grouting sleeve (13) of the concrete upper column (10), and at the same time, the connecting pipe (23) is inserted into the upper connecting piece (12); Step 4: grouting the grouting sleeve (13) and post-casting concrete on the upper sleeve (11) and the lower sleeve (21) to complete the connection between the prefabricated upper column and the prefabricated lower column.

Images