Fabricated prefabricated column connecting structure and construction method thereof

Abstract

The application discloses an assembled precast column connecting structure, and relates to the technical field of assembled buildings.The assembled precast column connecting structure comprises a supporting steel frame and embedded steel bars embedded in a precast column, the embedded steel bars extend out of the end of the precast column, the supporting steel frame is provided with a first receiving part and a second receiving part, a load-bearing ball is fixedly arranged on the supporting steel frame and between the first receiving part and the second receiving part, the load-bearing ball is fixedly connected with the first receiving part, a plurality of connecting plates are arranged on the second receiving part, each of the connecting plates is hingedly connected with the load-bearing ball, and each of the connecting plates is distributed along the circumference of the load-bearing ball, the first receiving part is used for being mounted at the top end of a lower precast column, the second receiving part is used for being mounted at the bottom end of an upper precast column, and a fixing mechanism is arranged on the supporting steel frame and used for fixing the embedded steel bars on the upper and lower precast columns.The application has the effect of improving the structural strength of the connecting joint position of the precast column.

Description

Technical Field

[0001] This application relates to the technical field of prefabricated buildings, and in particular to a prefabricated column connection structure and its construction method. Background Technology

[0002] Prefabricated buildings refer to buildings where a large amount of on-site work in traditional construction methods is transferred to factories. Building components and accessories, such as columns, floor slabs, wall panels, stairs, and balconies, are prefabricated in factories and then transported to the construction site for assembly and installation using reliable connection methods.

[0003] Currently, in existing prefabricated building projects, for high-rise buildings, the columns of prefabricated buildings are mainly composed of multiple precast columns spliced ​​together in sequence. The precast columns are mostly connected by sleeve grouting. During the production of precast columns, a portion of steel bars is usually reserved at their ends. When the precast columns are spliced ​​and installed, the steel bars at the ends of the two adjacent precast columns are tied and fixed. After the sleeve grouting is completed, the steel bars at the connection position of the two adjacent precast columns are embedded in the poured concrete.

[0004] However, the structural strength at the connection nodes of precast columns is limited when using sleeve grouting. As the main load-bearing component in prefabricated buildings, the columns are subjected to loads from all directions of the building during use, which makes the connection nodes of the precast columns prone to cracks, thereby affecting the overall structural strength of the building. Summary of the Invention

[0005] To improve the structural strength of precast column connection nodes, this application provides an assembled precast column connection structure and its construction method.

[0006] Firstly, this application provides a prefabricated column connection structure, which adopts the following technical solution:

[0007] A prefabricated column connection structure includes a supporting steel frame and embedded reinforcing bars embedded in the prefabricated column. The embedded reinforcing bars extend from the ends of the prefabricated column. The supporting steel frame is provided with a first receiving part and a second receiving part. A load-bearing ball is fixedly installed on the supporting steel frame between the first receiving part and the second receiving part. The load-bearing ball is fixedly connected to the first receiving part. The second receiving part is provided with a plurality of connecting support plates. Each connecting support plate is hinged to the load-bearing ball and is distributed along the circumference of the load-bearing ball. The first receiving part is used to be installed at the top of the lower prefabricated column, and the second receiving part is used to be installed at the bottom of the upper prefabricated column. A fixing mechanism is provided on the supporting steel frame for fixing the embedded reinforcing bars on the upper and lower prefabricated columns.

[0008] By adopting the above technical solution, the supporting steel frame is installed at the connection node of the precast column, with the first bearing part abutting the top of the lower precast column and the second bearing part abutting the bottom of the upper precast column. Then, the embedded steel bars on the upper and lower precast columns are fixed by the fixing mechanism, thereby fixing the supporting steel frame at the connection node of the precast column. Finally, concrete is poured into the connection node of the precast column using the sleeve grouting method, embedding the supporting steel frame and the embedded steel bars in the concrete, completing the splicing and installation of two adjacent precast columns. During the use of the prefabricated building, the loads on the upper precast columns in various directions are transferred to the load-bearing ball through the connecting plates on the second bearing part. Since each connecting plate is hinged to the load-bearing ball, the loads on each upper precast column in various directions are transferred vertically to the lower precast column, thereby effectively avoiding cracks at the connection node of the precast column and greatly improving the structural strength of the connection node of the precast column.

[0009] Optionally, multiple embedded steel bars are grouped together, and embedded steel bar groups are provided on the same precast column, with each embedded steel bar group distributed along the circumference of the precast column.

[0010] Optionally, both the first receiving part and the second receiving part are provided with a plurality of first mounting holes. The first mounting holes on the first receiving part correspond one-to-one with the pre-embedded steel bars at the top of the lower precast column, and the first mounting holes on the second receiving part correspond one-to-one with the pre-embedded steel bars at the bottom of the upper precast column. The first mounting holes are used for the corresponding pre-embedded steel bars to pass through.

[0011] Optionally, the fixing mechanism includes a first prestressed support, a second prestressed support, fixing components, and limiting components. The first and second prestressed supports are slidably mounted on the supporting steel frame. Multiple sets of fixing components are provided on both the first and second prestressed supports. The fixing components on the first prestressed support correspond one-to-one with the pre-embedded steel bars at the top of the lower precast column, and the fixing components on the second prestressed support correspond one-to-one with the pre-embedded steel bars at the bottom of the upper precast column. The fixing components are used to fix the corresponding pre-embedded steel bars, and the limiting components are used to prevent the first and second prestressed supports from sliding.

[0012] Optionally, the fixing assembly includes a distribution plate and clamping components. Both the first and second prestressed supports have multiple second mounting holes. The second mounting holes on the first prestressed support correspond one-to-one with the embedded steel reinforcement groups at the top of the lower precast column, and the second mounting holes on the second prestressed support correspond one-to-one with the embedded steel reinforcement groups at the bottom of the upper precast column. The distribution plate has multiple branching holes, and each branching hole corresponds one-to-one with the embedded steel reinforcement in its corresponding embedded steel reinforcement group. The sidewalls of the branching holes are inclined. Multiple clamping components are provided, each corresponding one-to-one with the branching holes on the distribution plate. The clamping components are used to clamp the embedded steel reinforcement in the corresponding branching hole.

[0013] Optionally, the clamping component includes a first clamping piece and a second clamping piece, the first clamping piece and the second clamping piece are hinged to each other, and the sides of the first clamping piece and the second clamping piece that are close to each other are provided with clamping grooves for clamping the pre-embedded steel bars, and the sidewalls of the first clamping piece and the second clamping piece that are far from each other gradually approach each other in the direction away from the hinge end.

[0014] Optionally, the sidewalls of the clamping grooves on the first and second clamping pieces are provided with anti-slip textures.

[0015] Optionally, the limiting component includes a tie rod, the two ends of which are slidably mounted on the first prestressed support and the second prestressed support, and both ends of the tie rod are provided with external threads, and nuts are adapted on the external threads on both sides of the tie rod.

[0016] Secondly, this application provides a construction method for a prefabricated column connection structure, employing the following technical solution:

[0017] A construction method for a prefabricated column connection structure includes the following steps:

[0018] S1. When splicing and installing precast columns, first construct the lower precast column, then install the supporting steel frame on the top of the constructed precast column, and make the first bearing part abut against the top of the lower precast column.

[0019] S2. Hoist another precast column to the top of the supporting steel frame, and abut the bottom end of the upper precast column with the second bearing part on the supporting steel frame, and then pre-fix the upper precast column;

[0020] S3. Fix the embedded steel bars on the precast columns on both the upper and lower sides to the supporting steel frame;

[0021] S4. Install grouting sleeves at the connection nodes of two adjacent precast columns, and pour concrete into the grouting sleeves to embed the supporting steel frame and the pre-embedded steel bars in the concrete.

[0022] S5. Curing the concrete inside the grouting sleeve. After the concrete has solidified, remove the grouting sleeve and complete the splicing and installation of the two adjacent precast columns.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. Install the supporting steel frame at the connection node of the precast column, with the first bearing abutting the top of the lower precast column and the second bearing abutting the bottom of the upper precast column. Then, fix the embedded steel bars on the upper and lower precast columns using a fixing mechanism, thereby fixing the supporting steel frame at the connection node of the precast column. Finally, use sleeve grouting to pour concrete at the connection node of the precast column, embedding the supporting steel frame and embedded steel bars in the concrete, completing the splicing and installation of two adjacent precast columns. During the use of the prefabricated building, the loads on the upper precast columns in various directions are transferred to the load-bearing ball through the connecting plates on the second bearing. Since each connecting plate is hinged to the load-bearing ball, the loads on each upper precast column in various directions are transferred vertically to the lower precast column, thereby effectively preventing cracks from forming at the connection node of the precast column and greatly improving the structural strength of the connection node of the precast column.

[0025] 2. During installation, the pre-embedded steel bars at the top of the lower precast column are fixed to the first prestressed support using fixing components, and the pre-embedded steel bars at the bottom of the upper precast column are fixed to the second prestressed support. Then, the first and second prestressed supports are driven to move closer to each other. During the sliding process, the first and second prestressed supports tighten the pre-embedded steel bars on the upper and lower precast columns respectively, and form a certain prestress in the precast column, further improving the structural strength of the precast column after assembly. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0027] Figure 2 This is a schematic diagram illustrating the structure of the embedded reinforcing bars in the embodiments of this application;

[0028] Figure 3 This is a cross-sectional view of the supporting steel frame used in the embodiments of this application;

[0029] Figure 4 This is a schematic diagram illustrating the structure of the supporting steel frame according to an embodiment of this application;

[0030] Figure 5 yes Figure 1 Enlarged view of section A;

[0031] Figure 6 This is a schematic diagram illustrating the structure of the fixed component in an embodiment of this application.

[0032] Explanation of reference numerals in the attached drawings: 1. Supporting steel frame; 101. First receiving part; 102. Second receiving part; 103. Fixing sleeve; 104. Load-bearing ball; 105. Fixing frame; 106. Connecting support plate; 107. First mounting hole; 108. First prestressed support; 109. Second prestressed support; 110. Mounting frame; 111. Guide rod; 112. Second mounting hole; 113. Tie rod; 114. Distribution plate; 115. Placement groove; 116. Distribution hole; 117. First clamping piece; 118. Second clamping piece; 2. Embedded reinforcing bar. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0034] This application discloses a prefabricated column connection structure. (Refer to...) Figure 1 , 2 It includes a supporting steel frame 1 and embedded steel bars 2 embedded in the precast column. The embedded steel bars 2 extend out of the end of the precast column. Multiple embedded steel bars 2 are grouped together, and multiple groups of embedded steel bars 2 are set on the same precast column. Each group of embedded steel bars 2 is distributed along the circumference of the precast column.

[0035] Reference Figure 3 The supporting steel frame 1 is provided with a first receiving part 101 and a second receiving part 102. The first receiving part 101 is fixedly installed on the supporting steel frame 1. A fixing sleeve 103 is fixedly installed on the supporting steel frame 1. The axial direction of the fixing sleeve 103 is perpendicular to the first receiving part 101. The second receiving part 102 passes through the fixing sleeve 103. A load-bearing ball 104 is fixedly installed on the supporting steel frame 1 and located between the first receiving part 101 and the second receiving part 102. A fixing frame 105 is fixedly installed at one end of the first receiving part 101 near the second receiving part 102. The fixing frame 105 is fixedly connected to the load-bearing ball 104. A plurality of connecting support plates 106 are fixedly installed at one end of the second receiving part 102 near the first receiving part 101. Each connecting support plate 106 is distributed along the circumference of the fixing sleeve 103, and each connecting support plate 106 is hinged to the load-bearing ball 104.

[0036] Reference Figure 4The first receiving part 101 and the second receiving part 102 are each provided with a plurality of first mounting holes 107. The first mounting holes 107 on the first receiving part 101 correspond one-to-one with the two sets of pre-embedded steel bars at the top of the lower precast column, and the first mounting holes 107 on the second receiving part 102 correspond one-to-one with the two sets of pre-embedded steel bars at the bottom of the upper precast column. When the support steel frame 1 is installed, the two sets of pre-embedded steel bars at the top of the lower precast column are passed through the corresponding first mounting holes 107 on the first receiving part 101, and the two sets of pre-embedded steel bars at the bottom of the upper precast column are passed through the corresponding first mounting holes 107 on the second receiving part 102, thereby increasing the stability of the support steel frame 1 after installation.

[0037] Reference Figure 4 The supporting steel frame 1 is provided with a fixing mechanism for fixing the pre-embedded steel bars 2 on the precast columns on the upper and lower sides. The fixing mechanism includes a first prestressed support 108, a second prestressed support 109, a fixing component and a limiting component. An installation frame 110 is fixedly installed on the supporting steel frame 1. Multiple guide rods 111 are fixedly installed on the installation frame 110. The length of each guide rod 111 is parallel to the central axis of the fixing sleeve 103. The first prestressed support 108 and the second prestressed support 109 are slidably sleeved on each guide rod 111 and are respectively located on both sides of the installation frame 110. The first prestressed support 108 is located on the side closer to the first receiving part 101, and the second prestressed support 109 is located on the side closer to the second receiving part 102.

[0038] Reference Figure 4 The first prestressed support 108 and the second prestressed support 109 are each provided with a plurality of second mounting holes 112. The second mounting holes 112 on the first prestressed support 108 correspond one-to-one with the first mounting holes 107 on the first receiving part 101, and the second mounting holes 112 on the second prestressed support 109 correspond one-to-one with the first mounting holes 107 on the second receiving part 102. Each second mounting hole 112 on the first prestressed support 108 is used for the two sets of pre-embedded steel bars corresponding to the top of the lower precast column to pass through, and the second mounting holes 112 on the second prestressed support 109 are used for the two sets of pre-embedded steel bars corresponding to the bottom of the upper precast column to pass through.

[0039] Reference Figure 4The limiting component includes a tie rod 113. Multiple tie rods 113 are fixed on the mounting bracket 110, and the length direction of each tie rod 113 is parallel to the length direction of the guide rod 111. Multiple first through holes are opened on the first prestressed bracket 108 along the length direction of the tie rod 113. Each first through hole corresponds to a tie rod 113, and one end of the tie rod 113 slides through the corresponding first through hole on the first prestressed bracket 108. Multiple second through holes are opened on the second prestressed bracket 109 along the length direction of the tie rod 113. Each second through hole corresponds to a tie rod 113, and one end of the tie rod 113 away from the first prestressed bracket 108 slides through the corresponding second through hole on the second prestressed bracket 109. Both ends of the tie rod 113 are provided with external threads, and nuts are fitted on the external threads on both sides of the tie rod 113.

[0040] Reference Figure 4 , 5 The first prestressed support 108 and the second prestressed support 109 are each equipped with multiple sets of fixing components, and each second mounting hole 112 is respectively provided with a set of fixing components. The fixing components are used to fix the two sets of pre-embedded steel bars at the corresponding second mounting holes 112. When the support steel frame 1 is installed, the two sets of pre-embedded steel bars at the top of the lower precast column are respectively passed through the corresponding second mounting holes 112 on the first prestressed support 108, and the two sets of pre-embedded steel bars at the bottom of the upper precast column are respectively passed through the corresponding second mounting holes 112 on the second prestressed support 109. The mounting hole 112 is used to fix the pre-embedded steel bar 2 at the top of the lower precast column to the first prestressed support 108 through the fixing component, and fix the pre-embedded steel bar 2 at the bottom of the upper precast column to the second prestressed support 109. Then, the first prestressed support 108 and the second prestressed support 109 are driven to move closer to each other. During the sliding process, the first prestressed support 108 and the second prestressed support 109 respectively tighten the pre-embedded steel bars 2 on the upper and lower precast columns, and form a certain prestress in the precast column, which further improves the structural strength of the precast column after assembly.

[0041] Reference Figure 5 , 6 The fixing assembly includes a distribution plate 114 and a clamping component. The first prestressed bracket 108 and the second prestressed bracket 109 are each provided with a plurality of placement slots 115 at their respective close ends. The placement slots 115 on the first prestressed bracket 108 correspond one-to-one with the second mounting holes 112 on the first prestressed bracket 108. The placement slots 115 on the second prestressed bracket 109 correspond one-to-one with the second mounting holes 112 on the second prestressed bracket 109. The placement slots 115 are connected to the corresponding second mounting holes 112. The placement slots 115 are adapted to the distribution plate 114.

[0042] Reference Figure 6The distribution plate 114 has multiple distribution holes 116, and the distribution holes 116 on the distribution plate 114 correspond one-to-one with the pre-embedded steel bars 2 in the corresponding pre-embedded steel bar 2 groups. The side walls of the distribution holes 116 are inclined, and the diameter of the distribution holes 116 gradually increases along the axial direction of the distribution plate 114. The diameter change direction of each distribution hole 116 on the same distribution plate 114 is consistent.

[0043] Reference Figure 6 Each branch hole 116 on the distributor plate 114 is respectively provided with a clamping component, which includes a first clamping piece 117 and a second clamping piece 118. The first clamping piece 117 and the second clamping piece 118 are hinged to each other, and the sides of the first clamping piece 117 and the second clamping piece 118 that are close to each other are provided with clamping grooves for clamping the pre-embedded steel bars 2. The side walls of the first clamping piece 117 and the second clamping piece 118 that are far apart from each other gradually approach each other in the direction away from the hinge end. The side walls of the clamping grooves on the first clamping piece 117 and the second clamping piece 118 are provided with anti-slip textures. After the pre-embedded steel bars 2 groups pass through the corresponding second mounting holes 112, the distributor plate 114 is sleeved on the pre-embedded steel bars 2 groups, and each pre-embedded steel bar 2 in the same pre-embedded steel bar 2 group passes through the corresponding branch hole 116 on the distributor plate 114. 16. During installation, the pre-embedded steel bar 2 is inserted into the branch hole 116 from the side with the smaller diameter. Then, the branch plate 114 is placed in the corresponding placement groove 115. The clamping piece is clamped onto the corresponding pre-embedded steel bar 2 by the first clamping piece 117 and the second clamping piece 118. The first clamping piece 117 and the second clamping piece 118 are both inserted into the corresponding branch hole 116. As the first prestressed support 108 and the second prestressed support 109 slide, the first clamping piece 117 and the second clamping piece 118 slide in the branch hole 116 and move closer to each other under the guidance of the inclined surface of the branch hole 116, increasing the clamping force on the pre-embedded steel bar 2 and fixing the pre-embedded steel bar 2 onto the corresponding first prestressed support 108 or second prestressed support 109.

[0044] The implementation principle of the prefabricated column connection structure in this application embodiment is as follows: the supporting steel frame 1 is installed at the connection node of the prefabricated column, and the first receiving part 101 abuts against the top of the lower prefabricated column, and the second receiving part 102 abuts against the bottom of the upper prefabricated column. The two sets of pre-embedded steel bars at the top of the lower prefabricated column are respectively passed through the corresponding first mounting hole 107 on the first receiving part 101 and the corresponding second mounting hole 112 on the first prestressed bracket 108. The two sets of pre-embedded steel bars at the bottom of the upper prefabricated column are respectively passed through the corresponding first mounting hole 107 on the second receiving part 102 and the corresponding second mounting hole 112 on the second prestressed bracket 109.

[0045] The distribution plate 114 is fitted onto the two sets of pre-embedded reinforcing bars, and each pre-embedded reinforcing bar 2 in the same set passes through the corresponding distribution hole 116 on the distribution plate 114. During installation, the pre-embedded reinforcing bar 2 is inserted into the distribution hole 116 from the side with the smaller diameter. Then, the distribution plate 114 is placed in the corresponding placement groove 115, and the clamping member is clamped onto the corresponding pre-embedded reinforcing bar 2 by the first clamping piece 117 and the second clamping piece 118. The first clamping piece 117 and the second clamping piece 118 are both inserted into the corresponding distribution hole 116. Then, the nuts at both ends of each tie rod 113 are rotated to allow the first prestressed bracket 108 and the second prestressed bracket 108 to move. All brackets 109 slide towards the mounting frame 110. As the first prestressed bracket 108 and the second prestressed bracket 109 slide, the first clamping piece 117 and the second clamping piece 118 slide within the dividing hole 116 and move closer to each other under the guidance of the inclined surface of the dividing hole 116, increasing the clamping force on the embedded steel bar 2 and fixing the embedded steel bar 2 to the corresponding first prestressed bracket 108 or second prestressed bracket 109. During the sliding process, the first prestressed bracket 108 and the second prestressed bracket 109 respectively tighten the embedded steel bar 2 on the upper and lower sides of the precast column, and form a certain prestress in the precast column, thereby fixing the supporting steel frame 1 at the connection node position of the precast column.

[0046] Finally, concrete is poured into the connection node of the precast column using the sleeve grouting method, embedding the supporting steel frame 1 and the pre-embedded steel bar 2 into the concrete, completing the splicing and installation of two adjacent precast columns. During the use of the prefabricated building, the loads on the upper precast columns in various directions are transferred to the load-bearing ball 104 through the connecting support plates 106 on the second bearing part 102. Since each connecting support plate 106 is hinged to the load-bearing ball 104, the loads on each upper precast column in various directions are transferred to the lower precast column in the vertical direction, thereby effectively avoiding cracks at the connection node of the precast column and greatly improving the structural strength of the connection node of the precast column.

[0047] This application also discloses a construction method for a prefabricated column connection structure, including the following steps:

[0048] S1. When splicing and installing precast columns, first construct the lower precast column, install the supporting steel frame 1 on the top of the constructed precast column, and make the first bearing part 101 abut against the top of the lower precast column.

[0049] S2. Hoist another precast column to the top of the support steel frame 1, and abut the bottom end of the upper precast column with the second receiving part 102 on the support steel frame 1, and then pre-fix the upper precast column.

[0050] S3. Fix the pre-embedded steel bars 2 on the upper and lower precast columns onto the supporting steel frame 1;

[0051] S4. Install grouting sleeves at the connection nodes of two adjacent precast columns, and pour concrete into the grouting sleeves to embed the supporting steel frame 1 and the pre-embedded steel bars 2 into the concrete.

[0052] S5. Curing the concrete inside the grouting sleeve. After the concrete has solidified, remove the grouting sleeve and complete the splicing and installation of the two adjacent precast columns.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A prefabricated column connection structure, characterized in that: The precast column includes a supporting steel frame (1) and embedded reinforcing bars (2) embedded in the precast column. The embedded reinforcing bars (2) extend out of the end of the precast column. The supporting steel frame (1) is provided with a first receiving part (101) and a second receiving part (102). A load-bearing ball (104) is fixedly provided on the supporting steel frame (1) between the first receiving part (101) and the second receiving part (102). The load-bearing ball (104) is fixedly connected to the first receiving part (101). The second receiving part (102) is fixedly connected to the first receiving part (102). 2) Multiple connecting support plates (106) are provided on the upper part, each of the connecting support plates (106) is hinged to the load-bearing ball (104), and each of the connecting support plates (106) is distributed along the circumference of the load-bearing ball (104). The first receiving part (101) is used to be installed at the top of the lower precast column, and the second receiving part (102) is used to be installed at the bottom of the upper precast column. The supporting steel frame (1) is provided with a fixing mechanism, which is used to fix the embedded steel bars (2) on the upper and lower precast columns. The pre-embedded steel bars (2) are in groups of multiples, and a group of pre-embedded steel bars (2) is provided on the same precast column, and each group of pre-embedded steel bars (2) is distributed along the circumference of the precast column; The first receiving part (101) and the second receiving part (102) are provided with a plurality of first mounting holes (107). The first mounting holes (107) on the first receiving part (101) correspond one-to-one with the pre-embedded steel bars (2) at the top of the precast column below. The first mounting holes (107) on the second receiving part (102) correspond one-to-one with the pre-embedded steel bars (2) at the bottom of the precast column above. The first mounting holes (107) are used for the corresponding pre-embedded steel bars (2) to pass through. The fixing mechanism includes a first prestressed support (108), a second prestressed support (109), fixing components, and limiting components. The first prestressed support (108) and the second prestressed support (109) are slidably mounted on the supporting steel frame (1). Multiple sets of fixing components are provided on the first prestressed support (108) and the second prestressed support (109). The fixing components on the first prestressed support (108) correspond one-to-one with the pre-embedded steel bars (2) at the top of the lower precast column, and the fixing components on the second prestressed support (109) correspond one-to-one with the pre-embedded steel bars (2) at the bottom of the upper precast column. The fixing components are used to fix the corresponding pre-embedded steel bars (2). The limiting components are used to prevent the first prestressed support (108) and the second prestressed support (109) from sliding.

2. The prefabricated column connection structure according to claim 1, characterized in that: The fixing assembly includes a distribution plate (114) and a clamping component. Multiple second mounting holes (112) are provided on both the first prestressed support (108) and the second prestressed support (109). The second mounting holes (112) on the first prestressed support (108) correspond one-to-one with the pre-embedded steel bars (2) at the top of the lower precast column, and the second mounting holes (112) on the second prestressed support (109) correspond one-to-one with the pre-embedded steel bars (2) at the bottom of the upper precast column. Correspondingly, the dividing plate (114) is provided with a plurality of dividing holes (116), and the dividing holes (116) on the dividing plate (114) correspond one-to-one with the pre-embedded steel bars (2) in the corresponding pre-embedded steel bar (2) group. The side wall of the dividing hole (116) is inclined. Multiple clamping members are provided, and they correspond one-to-one with the dividing holes (116) on the dividing plate (114). The clamping members are used to clamp the pre-embedded steel bars (2) in the corresponding dividing holes (116).

3. The prefabricated column connection structure according to claim 2, characterized in that: The clamping component includes a first clamping piece (117) and a second clamping piece (118). The first clamping piece (117) and the second clamping piece (118) are hinged to each other, and the sides of the first clamping piece (117) and the second clamping piece (118) that are close to each other are provided with clamping grooves for clamping the pre-embedded steel bars (2). The sidewalls of the first clamping piece (117) and the second clamping piece (118) that are far apart from each other gradually approach each other in the direction away from the hinge end.

4. The prefabricated column connection structure according to claim 3, characterized in that: The sidewalls of the clamping grooves on the first clamping piece (117) and the second clamping piece (118) are provided with anti-slip textures.

5. The prefabricated column connection structure according to claim 1, characterized in that: The limiting component includes a tie rod (113), the two ends of which are slidably mounted on the first prestressed bracket (108) and the second prestressed bracket (109), and both ends of the tie rod (113) are provided with external threads, and nuts are adapted on the external threads on both sides of the tie rod (113).

6. A construction method based on the prefabricated column connection structure according to any one of claims 1-5, characterized in that, Includes the following steps: S1. When splicing and installing precast columns, first construct the lower precast column, install the supporting steel frame (1) on the top of the constructed precast column, and make the first receiving part (101) abut against the top of the lower precast column. S2. Hoist another precast column to the top of the support steel frame (1) and abut the bottom end of the upper precast column against the second receiving part (102) on the support steel frame (1), and then pre-fix the upper precast column. S3. Fix the pre-embedded steel bars (2) on the upper and lower precast columns to the supporting steel frame (1); S4. Install grouting sleeves at the connection nodes of two adjacent precast columns and pour concrete into the grouting sleeves to embed the supporting steel frame (1) and the pre-embedded steel bars (2) into the concrete. S5. Curing the concrete inside the grouting sleeve. After the concrete has solidified, remove the grouting sleeve and complete the splicing and installation of the two adjacent precast columns.

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