Fabricated column structure

Abstract

The utility model discloses an assembly type column structure. Comprising a lower prefabricated column, prefabricated beams arranged on the two sides of the top of the lower prefabricated column, a cast-in-place layer arranged between the lower prefabricated column and the two prefabricated beams, lower connecting steel bars arranged on the lower prefabricated column in an embedded mode, an upper prefabricated column arranged on the top of the cast-in-place layer and a grouting assembly arranged in the upper prefabricated column. Grouting cavities are formed in the positions, corresponding to the upper connecting steel bars or the lower connecting steel bars, of the bottom of the upper prefabricated column, and one ends of the lower connecting steel bars penetrate through the cast-in-place layer to be located in the grouting cavities. The grouting assembly comprises a grouting pipe, an exhaust pipe and a grout outlet pipe which are communicated with the grouting cavity, a sealing rubber plug is arranged on the grout outlet pipe, and the grouting cavity is filled with grout through the grouting pipe. The structure has the advantages of good connection stability and reliability, strong exhaust capacity during grouting, high connection quality, simple and compact overall structure, convenience in construction operation and wide application prospect.

Description

Technical Field

[0001] The utility model relates to the technical field of assembled concrete structures, in particular to an assembled column structure. Background Art

[0002] Prefabricated concrete structures have the advantages of being green, environmentally friendly, and having a short construction period. They are also an important development direction for building industrialization. At this stage, the application of prefabricated concrete structures has begun to take shape and has good economic efficiency. The prefabricated components of prefabricated concrete structures are mass-produced in factories, and the prefabricated components are assembled at the construction site to form a designated building structure. The construction efficiency is high, but the structural integrity of prefabricated concrete structures is poor compared to cast-in-place concrete structures. The mechanical properties of the structure depend to a large extent on the mechanical properties of the prefabricated component assembly joints. The grouting sleeve can effectively connect the prefabricated components, but the grouting sleeve has a large stiffness, which will cause uneven stiffness distribution of the components at the connection structure, thereby affecting the overall seismic performance of the structure. In addition, the existing grouting operation has the phenomenon of insufficient exhaust, which reduces the quality of the prefabricated component connection and affects the overall structural strength. The invention patent with application number 202110497047.3 discloses an assembled beam-column connection structure connected by sleeve grouting, including: a prefabricated beam, including a core structure area provided with a through hole, a sleeve installed in the through hole, and the core structure area and the prefabricated beam are prefabricated as one piece; a prefabricated lower column, arranged on the first side of the core structure area; a prefabricated upper column, arranged on the second side of the core structure area; the ends of the prefabricated lower column and the prefabricated upper column close to the core structure area are provided with anchor steel bars, the anchor steel bars are inserted into the sleeve, and the sleeve and the anchor steel bars are connected by grouting material. The core structure area and the prefabricated beam are prefabricated as one piece, and the structure has good integrity. The sleeve is installed in the core structure area, which can not only improve the shear strength of the core structure area, but also avoid the uneven distribution of stiffness when the sleeve is installed in the prefabricated column, thereby improving the seismic performance of the building structure, but the structure has relatively poor exhaust capacity during grouting construction, and the connection strength is not stable. Utility Model Content

[0003] The utility model aims to provide an assembled column structure, which has good connection stability and reliability, strong exhaust capacity during grouting, high connection quality, simple and compact overall structure, convenient construction and wide application prospects.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A prefabricated column structure comprises a lower prefabricated column, prefabricated beams arranged on both sides of the top of the lower prefabricated column, a cast-in-place layer arranged between the lower prefabricated column and the two prefabricated beams, a lower connecting steel bar pre-embedded on the lower prefabricated column, an upper prefabricated column arranged on the top of the cast-in-place layer and a grouting assembly arranged in the upper prefabricated column, wherein a grouting cavity is arranged at the bottom of the upper prefabricated column corresponding to the position of the upper connecting steel bar or the lower connecting steel bar, one end of the lower connecting steel bar passes through the cast-in-place layer and is located in the grouting cavity; the grouting assembly comprises a grouting pipe, an exhaust pipe and a grouting outlet pipe connected to the grouting cavity, a sealing rubber plug is arranged on the grouting outlet pipe, and slurry is filled into the grouting cavity through the grouting pipe.

[0006] Preferably, an upper connecting steel bar is embedded in the upper prefabricated column, a connecting sleeve is fixedly connected to the bottom of the upper connecting steel bar, and the top of the lower connecting steel bar is connected to the other end of the connecting sleeve.

[0007] Preferably, the lower prefabricated column and the upper prefabricated column are cubic columns with matching shapes.

[0008] Preferably, the cross-section of the cast-in-place layer is partially T-shaped.

[0009] Preferably, a positioning plate is provided in the cast-in-place layer, the positioning plate is provided with positioning holes matched with the position and quantity of the lower connecting steel bars, each lower connecting steel bar passes through a positioning hole, and a through hole is provided on the positioning plate.

[0010] Preferably, one grouting assembly is provided on one side of each grouting cavity.

[0011] In the utility model, two adjacent lower prefabricated columns and an upper prefabricated column are fixedly connected by the lower connecting steel bar, which has good connection stability. In actual operation, the prefabricated column can be divided into several sections for prefabrication according to needs, and then spliced ​​on site, which reduces the construction difficulty. The connected lower prefabricated column and the upper prefabricated column are integrated by the grouting assembly, which has good structural stability. An exhaust pipe is set at the top of the grouting cavity, and gravity is used to discharge the air during grouting, which has good exhaust capacity and improves the tightness of the connection. The set connecting sleeve fixes the lower connecting steel bar to ensure the connection strength of the structure. The set positioning plate can correct the position of multiple lower connecting steel bars, which is convenient for the connection operation of the lower prefabricated column and the upper prefabricated column, and avoids the problem that the position of the lower connecting steel bar deviates during the construction of the cast-in-place layer and affects the subsequent connection operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic cross-sectional view of the overall structure of the utility model;

[0013] Figure 2 It is a schematic cross-sectional view of a local structure of the utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the positioning plate of the utility model;

[0015] In the figure: 1. lower precast column; 2. precast beam; 3. cast-in-place layer; 4. lower connecting steel bar; 5. upper precast column; 6. upper connecting steel bar; 7. grouting assembly; 8. connecting sleeve; 9. steel bar connector; 10. positioning plate; 11. through hole; 12. grouting cavity; 70. grouting pipe; 71. exhaust pipe; 72. slurry outlet pipe; 73. sealing rubber plug; 90. connecting sleeve; 91. reset spring; 92. snap-in unit; 93. snap-in protrusion. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings:

[0017] like Figure 1 , Figure 2 and Figure 3 The assembled column structure shown includes a lower prefabricated column 1, prefabricated beams 2 arranged on both sides of the top of the lower prefabricated column 1, a cast-in-place layer 3 arranged between the lower prefabricated column 1 and the two prefabricated beams 2, a lower connecting steel bar 4 pre-embedded on the lower prefabricated column 1, an upper prefabricated column 5 arranged on the top of the cast-in-place layer 3, and a grouting assembly 7 arranged in the upper prefabricated column 5, an upper connecting steel bar 6 is pre-embedded in the upper prefabricated column 5, a grouting cavity 12 is arranged at the bottom of the upper prefabricated column 5, corresponding to the upper connecting steel bar 6 or the lower connecting steel bar 4, and one end of the lower connecting steel bar 4 passes through the cast-in-place layer 3 and is located in the grouting cavity 12. After the upper prefabricated column 5 is installed, it becomes the lower prefabricated column 1 of the upper prefabricated column 5 installed on its upper part, and this is repeated.

[0018] An upper connecting steel bar 6 is embedded in the upper prefabricated column 5 , and a connecting sleeve 8 is fixedly connected to the bottom of the upper connecting steel bar 6 . When the upper prefabricated column 5 is fixedly installed on the cast-in-place layer 3 , the top of the lower connecting steel bar 4 is connected to the other end of the connecting sleeve 8 . The top of the connecting sleeve 8 is fixedly installed on the bottom of the upper connecting steel bar 6 by threads, and a steel bar connector 9 is fixedly arranged at the bottom of the connecting sleeve 8. The steel bar connector 9 includes a connecting sleeve 90 connected to the connecting sleeve 8 by threads, a return spring 91 arranged in the connecting sleeve 90 and a plurality of clamping monomers 92 arranged in the connecting sleeve 90. The return spring 91 is arranged between the clamping monomer 92 and the end of the connecting sleeve 8. A conical cavity is arranged in the connecting sleeve 90. The plurality of clamping monomers 92 are truncated cone-shaped as a whole, and a clamping protrusion 93 is provided in the inner cavity of the clamping monomer 92. When the top of the lower connecting steel bar 4 passes through the inner cavity of the clamping monomer 92, the return spring 91 is compressed, and the plurality of clamping monomers 92 expand and the hole in the inner cavity becomes larger. After the lower connecting steel bar 4 passes through the inner cavity, under the action of the return spring 91, the clamping protrusion 93 clamps the lower connecting steel bar 4 to form a stable connection relationship.

[0019] In this embodiment, the lower precast column 1 and the upper precast column 5 are cubic columns with matching shapes. At each connection position, the cross-section of the cast-in-place layer 3 is partially T-shaped. A positioning plate 10 is provided in the cast-in-place layer 3. The positioning plate 10 is provided with positioning holes that match the position and number of the lower connecting steel bars 4. Each lower connecting steel bar 4 passes through a positioning hole. A through hole 11 is provided in the middle of the positioning plate 10. The through hole 11 is used for a vibrating rod to vibrate the cast-in-place layer 3.

[0020] The grouting assembly 7 includes a grouting pipe 70, an exhaust pipe 71 and a grouting pipe 72 connected to the grouting cavity 10. A sealing rubber plug 73 is fixedly arranged on the grouting pipe 72, and the grouting cavity 12 is filled with slurry through the grouting pipe 70. A grouting assembly 7 is arranged on one side of each grouting cavity 12. Before the grouting operation, the firmness of the mortar plugging the joint at the root of the upper prefabricated column 5 must be checked. Grouting is not allowed when the mortar strength is insufficient. When grouting, the grouting pipe 72 is plugged first, and after the exhaust pipe 71 is slurried, the sealing rubber plug 73 is pulled out, and the grouting is stopped after all the grouting pipes 72 and the exhaust pipe 71 are slurried. The slurry in the exhaust pipe 71 flows downward under the action of gravity, ensuring the connection quality between the upper prefabricated column 5 and the cast-in-place layer 3. The grouting pipe 70 , the exhaust pipe 71 and the slurry outlet pipe 72 are all made of PVC round tubes, one end of the PVC round tube is exposed outside the upper prefabricated column 5 , and the other end of the PVC round tube is connected to the grouting cavity 12 .

[0021] The above embodiments are only some descriptions of the concept and implementation of the utility model, and are not intended to limit the concept and implementation of the utility model. Under the concept of the utility model, technical solutions that have not been substantially changed are still within the scope of protection.

Claims

1. An assembled column structure, characterized in that: It includes a lower prefabricated column, prefabricated beams arranged on both sides of the top of the lower prefabricated column, a cast-in-place layer arranged between the lower prefabricated column and the two prefabricated beams, a lower connecting steel bar pre-embedded on the lower prefabricated column, an upper prefabricated column arranged on the top of the cast-in-place layer, and a grouting assembly arranged in the upper prefabricated column, wherein an upper connecting steel bar is pre-embedded in the upper prefabricated column, a connecting sleeve is fixedly connected to the bottom of the upper connecting steel bar, and the top of the lower connecting steel bar is connected to the other end of the connecting sleeve; a grouting cavity is arranged at the bottom of the upper prefabricated column corresponding to the position of the upper connecting steel bar or the lower connecting steel bar, one end of the lower connecting steel bar passes through the cast-in-place layer and is located in the grouting cavity; the grouting assembly includes a grouting pipe, an exhaust pipe and a grouting outlet pipe connected to the grouting cavity, a sealing rubber plug is arranged on the grouting outlet pipe, and the grouting cavity is filled with slurry through the grouting pipe.

2. The assembled column structure according to claim 1, characterized in that: The lower prefabricated column and the upper prefabricated column are cubic columns with matching shapes.

3. The assembled column structure according to claim 1, characterized in that: The cross section of the cast-in-place layer is partially T-shaped.

4. The assembled column structure according to claim 1 or 3, characterized in that: A positioning plate is arranged in the cast-in-place layer, and positioning holes matching the positions and the number of the lower connecting steel bars are arranged on the positioning plate. Each lower connecting steel bar passes through a positioning hole, and a through hole is arranged on the positioning plate.

5. The assembled column structure according to claim 1, characterized in that: A grouting assembly is arranged on one side of each grouting cavity.

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