Reinforcement multi-section connection integral grouting prefabricated column-steel beam structure and construction method thereof

Abstract

The present invention relates to a multi-section steel bar connected integral grouting prefabricated column-steel beam structure, comprising: a prefabricated first prefabricated section, in which a plurality of first steel bars are embedded; a core section prefabricated and placed on the top of the first prefabricated section, in which the first steel bar passes through the core section through a through hole and partially exposed at the top of the core section, in which a connecting piece partially protrudes outward and is fixedly connected to a crossbeam is embedded; a second prefabricated section prefabricated and placed on the top of the core section, in which a plurality of second steel bars corresponding to the first steel bar are embedded, the first steel bar extends into the second prefabricated section through a plug hole and is butt-connected to the second steel bar; and a grouting hole connected to the connection between the first steel bar and the second steel bar and opened in the second prefabricated section. The present invention effectively solves the problem of construction difficulties of prefabricated concrete columns, simplifies the connection process, does not require additional temporary support, improves construction efficiency, and improves the overall stability of concrete columns.

Description

Technical Field

[0001] The invention relates to the field of building construction, and in particular to a multi-section steel bar connected integral grouting prefabricated column-steel beam structure and a construction method thereof. Background Art

[0002] With the development of social modernization, the application of precast concrete structures has become more and more extensive. However, the existing precast concrete columns often require on-site steel tying at the connection nodes with the beams, and temporary supports need to be built during the tying process to support the precast sections of the concrete columns above and below the connection nodes. The operation is relatively complicated and the construction efficiency is low. The overall stability of the cast concrete columns is also poor. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a prefabricated column-steel beam structure with multi-section steel bar connections and integral grouting, which solves the problem of difficult construction of prefabricated concrete columns, simplifies the connection process, eliminates the need for additional temporary supports, improves construction efficiency, and improves the overall stability of concrete columns.

[0004] The technical solution to achieve the above purpose is:

[0005] The present invention provides a multi-section steel bar connection integral grouting prefabricated column-steel beam structure, comprising:

[0006] A first prefabricated section is prefabricated, wherein a plurality of first steel bars are embedded in the first prefabricated section, and a portion of the first steel bars protrudes outward from a top of the first prefabricated section;

[0007] A core section is prefabricated and placed on top of the first prefabricated section, wherein a through hole is formed in the core section corresponding to the first steel bar, the first steel bar passes through the core section through the through hole and partially emerges from the top of the core section, and a connecting piece partially protruding outwards and fixedly connected to the cross beam is pre-buried in the core section;

[0008] A second prefabricated section is prefabricated and placed on top of the core section, wherein a plurality of second steel bars are pre-embedded in the second prefabricated section corresponding to the first steel bars, and a plurality of insertion holes are formed in the exposed portion of the second prefabricated section corresponding to the first steel bars, and the first steel bars extend into the second prefabricated section through the insertion holes and are butt-connected with the second steel bars; and

[0009] A grouting hole connected to the connection between the first steel bar and the second steel bar and opened in the second prefabricated section is used to fix the first steel bar and the second steel bar by pouring concrete into the grouting hole to form an integrated concrete column structure.

[0010] The present invention adopts an integral grouting prefabricated column-steel beam structure connected by multiple sections of steel bars. The first prefabricated section, the second prefabricated section and the core section are prefabricated, and then the first prefabricated section is fixed at a specified position. The core section is placed on the top of the first prefabricated section and the first steel bar is passed through the core section, and the connecting piece in the core section is fixedly connected to the corresponding cross beam, and then the second prefabricated section is placed on the top of the core section, and then the gap between the first prefabricated section, the second prefabricated section and the core section is filled with concrete, and the first steel bar and the second steel bar are fixedly connected, thereby forming an integrated concrete column structure, and the connecting piece in the prefabricated core area is directly used to connect with the cross beam, and there is no need to tie steel bars on site. In addition, this bottom-up splicing method does not require additional temporary support, and during on-site installation, only the gap between the sections needs to be sealed with concrete, and the waiting time is short, which is conducive to shortening the construction period, solves the problem of difficult construction of prefabricated concrete columns, simplifies the connection process, does not require additional temporary support, improves construction efficiency, and improves the overall stability of the concrete column.

[0011] A further improvement of the steel bar multi-section connected integral grouting prefabricated column-steel beam structure of the present invention is that it also includes a connecting pipe vertically buried in the core section and the bottom of which is flush with the bottom surface of the core section, and an exhaust pipe with one end butt-connected to the connecting pipe and the other end flush with the side wall of the second prefabricated section. When pouring concrete, the air in the first prefabricated section, the core section and the second prefabricated section is discharged to the outside through the connecting pipe and the exhaust pipe.

[0012] A further improvement of the multi-section steel bar connected integral grouting prefabricated column-steel beam structure of the present invention is that it also includes a sealing member installed on the top of the connecting pipe, which is passed through the sealing member through the corresponding end of the exhaust pipe and connected to the connecting pipe, so that the exhaust pipe and the connecting pipe are sealed and connected.

[0013] A further improvement of the steel bar multi-section connection integral grouting prefabricated column-steel beam structure of the present invention is that the sealing element comprises:

[0014] A sleeve is provided on the connecting pipe and partially exposed to the outside, the sleeve is inserted into the connecting pipe through the exhaust pipe to dock with the connecting pipe, and a horizontal platform is formed at the end of the sleeve away from the connecting pipe; and

[0015] A support plate is sleeved on the sleeve and placed on the top surface of the core segment. A spring is connected between the support plate and the platform portion. The length of the spring is greater than the gap between the second prefabricated segment and the core segment. The rebound force formed by the compression of the spring pushes the support plate, so that the support plate and the platform portion are respectively tightly attached to the top surface of the core segment and the bottom surface of the second prefabricated segment.

[0016] A further improvement of the steel bar multi-section connection integral grouting prefabricated column-steel beam structure of the present invention is that the cross beam is a steel beam with an I-shaped cross section;

[0017] The connecting member comprises an I-beam corresponding to the crossbeam and pre-buried in the core section, and a keel vertically buried in the core section and fixedly connected to the I-beam. The exposed portion of the I-beam is fixedly connected to the crossbeam via a connecting plate and bolts.

[0018] The present invention provides a construction method of a multi-section steel bar connected integral grouting prefabricated column-steel beam structure, comprising the following steps:

[0019] Providing a prefabricated first prefabricated section, and fixing the first prefabricated section at a designated position;

[0020] Providing a prefabricated core segment, placing the core segment on the first prefabricated segment, passing the first steel bar through the through hole through the core segment, and fixing the connector to the corresponding cross beam;

[0021] Providing a prefabricated second prefabricated section, placing the second prefabricated section on the core section, and extending the exposed portion of the first steel bar into the second prefabricated section through the insertion hole and butting against the second steel bar;

[0022] Concrete is poured into the grouting holes to form an integrated concrete column structure.

[0023] The present invention provides a multi-section steel bar connection integral grouting prefabricated column-steel beam structure, comprising:

[0024] A first prefabricated section is prefabricated, wherein a plurality of first steel bars are embedded in the first prefabricated section, and a portion of the first steel bars protrudes outward from the top of the first prefabricated section;

[0025] a core section prefabricated and placed on top of the first prefabricated section, wherein a through hole is formed in the core section corresponding to the first steel bar, the first steel bar passes through the core section through the through hole and is partially exposed from the top of the core section, and a connecting piece partially protruding outwards and fixedly connected to the cross beam is pre-buried in the core section; and

[0026] A second prefabricated section is prefabricated and placed above the core section, wherein a plurality of second steel bars are pre-embedded in the second prefabricated section corresponding to the first steel bars, and the second steel bars protrude outward from the bottom of the second prefabricated section, and the protruding portion of the second steel bars is butt-connected to the exposed portion of the first steel bars through a sleeve, and a casting space is formed between the second prefabricated section and the core section, and concrete is poured into the casting space to fix the first steel bars and the second steel bars, thereby forming an integrated concrete column structure.

[0027] A further improvement of the multi-section steel bar connected integral grouting prefabricated column-steel beam structure of the present invention is that it also includes a keel vertically buried in the core section, the keel portion protrudes outward from the top of the core section, and the second prefabricated section is placed on the top of the protruding portion of the keel.

[0028] A further improvement of the multi-section steel bar connected integral grouting prefabricated column-steel beam structure of the present invention is that it also includes a connecting pipe vertically buried in the core section and the bottom of which is flush with the bottom surface of the core section. The top of the connecting pipe is connected to the casting space. By pouring concrete into the casting space, the concrete flows along the circulation pipe to the bottom of the core section and flows upward along the first steel bar to fill the gap between the first steel bar and the through hole.

[0029] The present invention provides a construction method of a multi-section steel bar connected integral grouting prefabricated column-steel beam structure, comprising the following steps:

[0030] Providing a prefabricated first prefabricated section, and fixing the first prefabricated section at a designated position;

[0031] Providing a prefabricated core segment, placing the core segment on the first prefabricated segment, passing the first steel bar through the through hole through the core segment, and fixing the connector to the corresponding cross beam;

[0032] Providing a prefabricated second prefabricated section, butting and connecting the exposed portion of the first steel bar with the exposed portion of the second steel bar through a sleeve, so that a casting space is formed between the second prefabricated section and the core section;

[0033] Formwork is set up around the casting space, and concrete is poured into the casting space to form an integrated concrete column structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a front view of an implementation mode of the multi-section steel bar connected integral grouting prefabricated column-steel beam structure of the present invention.

[0035] Figure 2 It is a front cross-sectional view of a sealing member in a multi-section steel bar connected integrally grouted prefabricated column-steel beam structure of the present invention.

[0036] Figure 3 It is a bottom view of the sealing member in the multi-section steel bar connected integral grouting prefabricated column-steel beam structure of the present invention.

[0037] Figure 4 It is a front view of another embodiment of the multi-section steel bar connected integral grouting prefabricated column-steel beam structure of the present invention. DETAILED DESCRIPTION

[0038] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0039] See also Figure 1The present invention provides a prefabricated column-steel beam structure with multiple sections of steel bars connected as a whole and grouting, which is prefabricated by prefabricating a first prefabricated section, a second prefabricated section and a core section, and then fixing the first prefabricated section to the ground, placing the core section on top of the first prefabricated section and passing the first steel bar through the core section, and fixing the connector in the core section with the corresponding cross beam, and then placing the second prefabricated section on top of the core section, and then using concrete to fill the gap between the first prefabricated section, the second prefabricated section and the core section, thereby forming an integrated concrete column structure, directly using the connector in the prefabricated core area to connect with the cross beam, without the need to tie steel bars on site, and in addition, this bottom-up splicing method does not require additional temporary support, and only concrete needs to be used to seal the gaps between the sections during on-site installation, and the waiting time is short, which is conducive to shortening the construction period, solving the problem of difficult construction of prefabricated concrete columns, simplifying the connection process, and not requiring additional temporary support, thereby improving construction efficiency and improving the overall stability of the concrete column. The prefabricated column-steel beam structure with multiple sections of steel bars connected as a whole and grouting of the present invention is described below in conjunction with the accompanying drawings.

[0040] See also Figure 1 , Figure 1 This is a front view of an embodiment of the multi-section steel bar connection integral grouting prefabricated column-steel beam structure of the present invention. Figure 1 , the multi-section steel bar connected integral grouting prefabricated column-steel beam structure of the present invention is described.

[0041] like Figure 1 As shown, the steel bar multi-section connected integral grouting prefabricated column-steel beam structure of the present invention comprises:

[0042] A first prefabricated section 11 is prefabricated, wherein a plurality of first steel bars 111 are embedded in the first prefabricated section 11, and a portion of the first steel bars 111 protrudes outward from the top of the first prefabricated section 11;

[0043] A core section 13 is prefabricated and placed on top of the first prefabricated section 11, a through hole is formed in the core section 13 corresponding to the first steel bar 111, the first steel bar 111 passes through the core section 13 through the through hole and is partially exposed from the top of the core section, and a connecting piece 131 partially protrudes outward and is embedded in the core section 13 for fixed connection with the cross beam 21;

[0044] A second prefabricated section 12 is prefabricated and placed on top of the core section 13, wherein a plurality of second steel bars 121 are pre-embedded in the second prefabricated section 12 corresponding to the first steel bars 111, and a plurality of insertion holes are formed in the exposed portion of the second prefabricated section 12 corresponding to the first steel bars 111, and the first steel bars 111 extend into the second prefabricated section 12 through the insertion holes and are butt-connected with the second steel bars 121; and

[0045] A grouting hole connected to the connection between the first steel bar 111 and the second steel bar 121 and opened in the second prefabricated section 12 is used to fix the first steel bar and the second steel bar by pouring concrete into the grouting hole, thereby forming an integrated concrete column structure.

[0046] Specifically, the cross beam 21 is a steel beam with an I-shaped cross section;

[0047] The connecting member 131 includes an I-beam 1311 corresponding to the crossbeam 21 and pre-embedded in the core section 13. The exposed portion of the I-beam 1311 is fixedly connected to the crossbeam 21 via a connecting plate and bolts, that is, the connecting plate is attached to the surface of the crossbeam 21 and the I-beam 1311, and then the connecting plate is fixed by bolts, so that the connecting plate is fixedly connected to the crossbeam 21 and the connecting member 131.

[0048] Preferably, the connecting member 131 further includes a steel frame embedded in the core segment 13 , and the steel frame is fixedly connected to the I-beam 1311 to improve the strength of the core segment 13 and the I-beam 1311 .

[0049] Preferably, the gaps between the first prefabricated section 11 , the second prefabricated section 12 and the core section 13 may be filled with a non-shrinkage seat slurry.

[0050] Preferably, a corrugated tube is pre-buried in the core section 13 corresponding to the first steel bar 111 to form a through hole and facilitate the first steel bar 111 to pass through the core section 13 .

[0051] As a preferred embodiment of the present invention, Figure 1 As shown, the end of the second steel bar 121 close to the core section 13 is sleeved with a sleeve 1211, and the sleeve 1211 is buried in the second prefabricated section 12, the exposed part of the first steel bar 111 is inserted in the sleeve 1211 to be butt-connected with the second steel bar 121, and the side of the second prefabricated section 12 is provided with a grouting hole connected to the inside of the sleeve 1211, and concrete flows into the sleeve 1211 from the grouting hole and flows downward along the first steel bar 111 to fill the gap between the first steel bar 111 and the core section 13. When the gap between the first steel bar 111 and the core section 13 is filled, the slurry flows upward to fill the sleeve 1211, making the entire concrete column structure more compact.

[0052] Furthermore, it also includes a connecting pipe 132 vertically buried in the core section 13 and with its bottom flush with the bottom surface of the core section 13, and an exhaust pipe 122 with one end docked with the connecting pipe 132 and the other end flush with the side wall of the second prefabricated section 12. When pouring concrete, the air in the first prefabricated section 11, the core section 13 and the second prefabricated section 12 is discharged to the outside through the connecting pipe 132 and the exhaust pipe 122.

[0053] Preferably, in order to ensure the exhaust effect, a separate exhaust pipe 122 may be provided, the bottom end of the exhaust pipe 122 is flush with the bottom surface of the second prefabricated section 12, and the exhaust pipe 122 may be in an inverted L shape.

[0054] Furthermore, it also includes a sealing member 14 installed on the top of the connecting pipe 132 , which is passed through the corresponding end of the exhaust pipe 122 and connected to the connecting pipe 132 , so that the exhaust pipe 122 and the connecting pipe 132 are sealed and connected.

[0055] Specific, combined Figure 2 and Figure 3 As shown, the seal 14 comprises:

[0056] A sleeve 141 is provided to be sleeved on the connecting pipe 132 and partially exposed to the outside. The sleeve 141 is inserted through the exhaust pipe 122 to connect with the connecting pipe 132. The end of the sleeve 141 away from the connecting pipe 132 is formed with a horizontal platform portion 1411; and

[0057] A support plate 142 is sleeved on the sleeve 141 and placed on the top surface of the core segment 13. A spring 143 is connected between the support plate 142 and the platform portion 1411. The length of the spring 143 is greater than the gap between the second prefabricated segment 12 and the core segment 13. The rebound force formed by the compression of the spring 143 pushes the support plate 142, so that the support plate 142 and the platform portion 1411 are respectively tightly attached to the top surface of the core segment 13 and the bottom surface of the second prefabricated segment 12, thereby preventing the slurry from leaking into the exhaust pipe 122 and the connecting pipe 132 when the slurry is filled in the gap between the first prefabricated segment 11 and the second prefabricated segment 12.

[0058] The present invention also provides a construction method for a multi-section steel bar connected integral grouting prefabricated column-steel beam structure, the method comprising the following steps:

[0059] Providing a prefabricated first prefabricated section 11, and fixing the first prefabricated section 11 at a designated position;

[0060] Providing a prefabricated core segment 13, placing the core segment 13 on the first prefabricated segment 11, passing the first steel bar through the through hole through the core segment 13, and fixing the connecting piece 131 to the corresponding cross beam 21;

[0061] Provide a prefabricated second prefabricated section 12, place the second prefabricated section 12 on the core section 13, and extend the exposed portion of the first steel bar 111 into the second prefabricated section 12 through the insertion hole and connect it with the second steel bar 121;

[0062] Concrete is poured into the grouting holes to form an integrated concrete column structure.

[0063] The specific implementation of the multi-section steel bar connection integral grouting prefabricated column-steel beam structure of the present invention is as follows:

[0064] like Figure 1 As shown, the first prefabricated section 11 is fixed to the ground, the core section 13 is placed on the top of the first prefabricated section 11, and the first steel bar 111 passes through the core section 13 and is partially exposed, and a corrugated pipe slurry outlet hole is opened at a position of the core section 13 corresponding to the corrugated pipe near the top;

[0065] The connecting piece 131 of the core section 13 is fixedly connected to the corresponding cross beam 21, which can be fixed by connecting plates and bolts;

[0066] The second prefabricated section 12 is placed on top of the core section 13, and the first steel bar 111 extends into the sleeve 1211 pre-buried in the second prefabricated section 12, the sleeve 1211 is connected to the grouting hole at a position corresponding to the first steel bar 111, and the second prefabricated section 12 is provided with a grouting hole corresponding to the second steel bar 121, and the grouting hole is connected to the inside of the sleeve 1211, that is, the grouting hole is located above the grouting hole;

[0067] When installing the second prefabricated section 12, the seal 14 is sleeved on the top of the connecting pipe 132, and the exhaust pipe 122 passes through the seal 14 and is butt-connected with the connecting pipe 132. After the second prefabricated section 12 is placed on the top of the core section 13, the spring of the seal 14 contracts and has a rebound force, and the rebound force pushes the support plate 142, so that the support plate 142 and the platform portion 1411 are tightly against the corresponding top surface of the core section 13 and the bottom surface of the second prefabricated section 12, so as to prevent the slurry poured in the gap between the second prefabricated section 12 and the core section 13 from leaking into the exhaust pipe 122 and the connecting pipe 132;

[0068] Fill the gaps between the first precast section 11, the core section 13 and the second precast section 12 with non-shrinkage seat slurry, and then inject concrete into the grouting holes. The concrete flows downward along the first steel bar 111 and fills the gap between the first steel bar 111 and the core section 13, and the gas is discharged outward through the connecting pipe 132 and the exhaust pipe 122. When slurry flows outward from the slurry outlet hole of the corrugated pipe, it indicates that the first steel bar 111 is fully compacted with the core section 13. The slurry outlet hole of the corrugated pipe is blocked, and pouring is continued. The slurry flows upward along the first steel bar 111 and fills the gap between the sleeve 1211 and the second steel bar 121 until the slurry outlet hole is uniformly discharged. The slurry outlet hole is blocked and grouting is continued. The slurry flows upward along the connecting pipe 132 to the exhaust pipe 122 until the opening of the exhaust pipe 122 is uniformly discharged outward. At this time, all the gaps in the core section 13 and the second precast section 12 are filled, forming an integrated and dense concrete column structure.

[0069] When pouring concrete in this way, it is only necessary to fill the gaps between the first steel bar 111, the second steel bar 121 and other parts, without having to wait for a long time for the concrete to reach the set strength. Therefore, the construction time can be shortened and the efficiency can be improved. In addition, each section is dense inside, so that the overall stability of the concrete column structure is better.

[0070] As another preferred embodiment of the present invention, Figure 4 As shown, including:

[0071] A first prefabricated section 11 is prefabricated, wherein a plurality of first steel bars 111 are embedded in the first prefabricated section 11, and a portion of the first steel bars 111 protrudes outward from the top of the first prefabricated section 11;

[0072] A core segment 13 is prefabricated and placed on top of the first prefabricated segment 11, wherein a through hole is formed in the core segment 13 corresponding to the first steel bar 111, wherein the first steel bar passes through the core segment 13 through the through hole and is partially exposed from the top of the core segment 13, and wherein a connecting piece partially protrudes outward and is fixedly connected to the cross beam 21 is pre-buried in the core segment 13; and

[0073] A second prefabricated section 12 is prefabricated and placed above the core section 13. A plurality of second steel bars 121 are pre-embedded in the second prefabricated section 12 corresponding to the first steel bars 111, and the second steel bars 121 protrude outward from the bottom of the second prefabricated section, and the protruding portion of the second steel bars 121 is butt-connected to the exposed portion of the first steel bars 111 via a sleeve 1211. A casting space is formed between the second prefabricated section 121 and the core section 13, and concrete is poured into the casting space to fix the first steel bars 111 and the second steel bars 121, thereby forming an integrated concrete column structure.

[0074] Preferably, specifically, the cross beam 21 is a steel beam with an I-shaped cross section;

[0075] The connecting member 131 includes an I-beam 1311 corresponding to the crossbeam 21 and pre-embedded in the core section 13. The exposed portion of the I-beam 1311 is fixedly connected to the crossbeam 21 via a connecting plate and bolts, that is, the connecting plate is attached to the surface of the crossbeam 21 and the I-beam 1311, and then the connecting plate is fixed by bolts, so that the connecting plate is fixedly connected to the crossbeam 21 and the connecting member 131.

[0076] Preferably, the space between the first prefabricated section 11, the second prefabricated section 12 and the core section can be filled with a non-shrinkage seat slurry.

[0077] Preferably, a corrugated tube is pre-buried in the core section 13 corresponding to the first steel bar 111 to form a through hole and facilitate the first steel bar 111 to pass through the core section 13 .

[0078] Furthermore, the connecting member 131 also includes a keel 1312 vertically buried in the core segment 13 and fixedly connected to the I-beam 1311, wherein the keel 1312 partially protrudes outward from the top of the core segment 13, and the second prefabricated segment 12 is placed on the top of the protruding portion of the keel 1312, and a casting space is formed between the second prefabricated segment 12 and the core segment 13, and the core segment 13 and the second prefabricated segment 12 are fixedly connected by pouring concrete into the casting space.

[0079] Furthermore, it also includes a connecting pipe 132 which is vertically buried in the core segment 13 and whose bottom is flush with the bottom surface of the core segment 13. The top of the connecting pipe 132 is connected to the casting space. By pouring concrete into the casting space, the concrete flows along the circulation pipe 132 to the bottom of the core segment 13 and flows upward along the first steel bar 111 to fill the gap between the first steel bar 111 and the through hole, that is, the concrete flows to the bottom of the core segment 13 and then flows to the first steel bar 111, and flows upward along the first steel bar 111 to fill the gap between the first steel bar 111 and the through hole, so that the first steel bar 111 and the core segment 13 are tightly connected.

[0080] The present invention also provides a construction method for a multi-section steel bar connected integral grouting prefabricated column-steel beam structure, the method comprising the following steps:

[0081] Providing a prefabricated first prefabricated section 11, and fixing the first prefabricated section 11 at a designated position;

[0082] Providing a prefabricated core segment 13, placing the core segment 13 on the first prefabricated segment 11, passing the first steel bar 111 through the through hole through the core segment 13, and fixing the connecting piece 131 to the corresponding cross beam 21;

[0083] A prefabricated second prefabricated section 12 is provided, and the exposed portion of the first steel bar 111 and the exposed portion of the second steel bar 121 are butt-connected through a sleeve 1211, so that a casting space is formed between the second prefabricated section 12 and the core section 13;

[0084] Formwork is set up around the casting space, and concrete is poured into the casting space to form an integrated concrete column structure.

[0085] The specific implementation of the multi-section steel bar connection integral grouting prefabricated column-steel beam structure of the present invention is as follows:

[0086] like Figure 4 As shown, the first prefabricated section 11 is fixed to the ground, the core section 13 is placed on the top of the first prefabricated section 11, and the first steel bar 111 passes through the core section 13 and is partially exposed;

[0087] The connecting piece 131 of the core section 13 is fixedly connected to the corresponding cross beam 21, which can be fixed by connecting plates and bolts;

[0088] The second prefabricated section is placed on the top of the keel 1312 protruding upward from the core section 13, and the first steel bar 111 is extended into the sleeve 1211 and connected with the second steel bar 121 protruding outward, and the connection node between the first steel bar 111 and the second steel bar 121 is located in the casting space;

[0089] Filling the gap between the core section 13 and the first prefabricated section 11 with non-shrinkage seat slurry;

[0090] A formwork is set up around the casting space, and grouting holes and grouting holes are set up on the formwork. Concrete slurry is injected into the casting space through the grouting holes. The slurry flows along the connecting pipe 132 to the bottom of the core section 13, and then flows along the bottom to the first steel bar 111, flows upward along the first steel bar 111 and fills the gap between the first steel bar 111 and the core section 13, and then fills the casting space. When the grouting holes are uniformly slurried outward, the grouting holes are blocked. At this time, the gaps between the first precast section 11, the core section 13 and the second precast section 12 are all filled, and an integrated and dense concrete column structure is formed;

[0091] This method can eliminate the structure of the seal 14 and the exhaust pipe 122, reduce construction costs, and the pouring space volume is not large. The amount of concrete that needs to be poured on site is less, so the time waiting for the concrete to reach the set strength is also less. The dense internal structure can ensure the stability of the concrete column. In addition, there is no need to set up temporary supports during the construction process, saving time and effort.

[0092] The present invention is described in detail above in conjunction with the embodiments of the drawings, and those skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute limitations of the present invention, and the scope of protection of the present invention shall be defined by the scope of the attached claims.

Claims

1. A precast concrete column structure, characterized in that: include: A first prefabricated section is prefabricated, wherein a plurality of first steel bars are embedded in the first prefabricated section, and a portion of the first steel bars protrudes outward from a top of the first prefabricated section; a core segment prefabricated and placed on top of the first prefabricated segment, wherein a through hole is formed in the core segment corresponding to the first steel bar, the first steel bar passes through the core segment through the through hole and is partially exposed from the top of the core segment, and a connecting piece partially protruding outwards and fixedly connected to the cross beam is pre-embedded in the core segment; a second prefabricated section that is prefabricated and placed on top of the core section, wherein a plurality of second steel bars are pre-embedded in the second prefabricated section corresponding to the first steel bars, and a plurality of insertion holes are formed in the exposed portion of the second prefabricated section corresponding to the first steel bars, and the first steel bars extend into the second prefabricated section through the insertion holes and are butt-connected with the second steel bars; and A grouting hole connected to the connection between the first steel bar and the second steel bar and opened in the second prefabricated section, wherein the first steel bar and the second steel bar are fixedly connected by pouring concrete into the grouting hole, thereby forming an integrated concrete column structure; It also includes a connecting pipe vertically buried in the core section and having its bottom flush with the bottom surface of the core section, and an exhaust pipe having one end butt-connected to the connecting pipe and the other end flush with the side wall of the second prefabricated section. When pouring concrete, the air in the first prefabricated section, the core section and the second prefabricated section is discharged to the outside through the connecting pipe and the exhaust pipe; It also includes a sealing member installed on the top of the connecting pipe, which is passed through the sealing member through the end portion corresponding to the exhaust pipe and docked with the connecting pipe, so that the exhaust pipe is sealed and connected with the connecting pipe; The sealing element comprises: A sleeve is provided on the connecting pipe and partially exposed to the outside, the sleeve is inserted through the exhaust pipe to dock with the connecting pipe, and a horizontal platform is formed at the end of the sleeve away from the connecting pipe; as well as A support plate sleeved on the sleeve and placed on the top surface of the core segment, wherein a spring is connected between the support plate and the platform portion, wherein the length of the spring is greater than the gap between the second prefabricated segment and the core segment, and the rebound force formed by the compression of the spring pushes against the support plate, so that the support plate and the platform portion are respectively in close contact with the top surface of the core segment and the bottom surface of the second prefabricated segment; The cross beam is a steel beam with an I-shaped cross section; The connecting member includes an I-beam corresponding to the crossbeam and pre-buried in the core section, and a keel vertically buried in the core section and fixedly connected to the I-beam. The exposed portion of the I-beam is fixedly connected to the crossbeam via a connecting plate and bolts.

2. A construction method for a precast concrete column structure as claimed in claim 1, characterized in that: The steps include: Providing the prefabricated first prefabricated section, and fixing the first prefabricated section at a designated position; Providing the prefabricated core segment, placing the core segment on the first prefabricated segment, passing the first steel bar through the through hole through the core segment, and fixing the connecting piece to the corresponding crossbeam; Providing the prefabricated second prefabricated section, placing the second prefabricated section on the core section, and extending the exposed portion of the first steel bar into the second prefabricated section through the insertion hole and butting and connecting with the second steel bar; Concrete is poured into the grouting holes to form an integrated concrete column structure.

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