Assembly type reinforced concrete prefabricated column connecting structure

Abstract

A fabricated reinforced concrete prefabricated column connecting structure comprises a lower-layer prefabricated column upper section, an upper-layer prefabricated column lower section, cushion blocks, spiral positioning devices, stirrups, formworks, supporting fixing pieces and post-cast high-strength concrete. The lower-layer prefabricated column upper section, the upper-layer prefabricated column lower section, the cushion blocks, the spiral positioning devices, the stirrups, the supporting fixing pieces and the like are solidified together through post-pouring high-strength concrete to form the assembly type reinforced concrete prefabricated column connecting structure. According to the elevation of the upper section of the lower-layer prefabricated column and the post-pouring compaction requirement, the thickness of the cushion block is selected to control the elevation of the bottom of the upper-layer prefabricated column, horizontal positioning of the bottom of the upper-layer prefabricated column is accurately controlled through holes formed in the spiral positioning device of the pre-embedded steel rib support and the spiral positioning device pre-installed on the internal thread, and the construction precision is improved; high-strength concrete is adopted for post-pouring, the high-strength concrete fault-tolerant connecting technology is adopted for reinforcing steel bars, the lap joint and anchoring length is reduced, the construction difficulty is lowered, the engineering quality is guaranteed, and the construction progress is accelerated.

Description

Technical Field

[0001] The utility model relates to a reinforced concrete column connection, in particular to an assembled reinforced concrete prefabricated column connection structure. Background Art

[0002] my country is vigorously promoting the construction of prefabricated concrete buildings. The connection and construction method of prefabricated reinforced concrete frame structure columns is one of the keys to the construction technology of prefabricated concrete buildings. The existing "Technical Standards for Prefabricated Concrete Buildings" in my country stipulates that the adjacent prefabricated columns of the upper and lower layers of the frame structure adopt temporary support by legs and longitudinal stress-bearing steel bar extrusion sleeve connection structure. On the one hand, the prefabricated columns are heavy, and the temporary support by legs is difficult to support the prefabricated columns, affecting safety. At the same time, the hoisting alignment error is large; on the other hand, the longitudinal stress-bearing steel bars extending out of the concrete during transportation of the prefabricated columns are often bent and deformed, making it difficult to align with the extrusion sleeve during installation, making the construction difficult and the project quality difficult to guarantee. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects in the prior art that temporary support of the legs is difficult to support the prefabricated columns, affecting safety, and the prefabricated columns are bent and deformed during transportation, which makes it difficult to align with the extrusion sleeve during installation, and to provide an assembled reinforced concrete prefabricated column connection structure.

[0004] The utility model adopts a technical solution to solve its technical problems. It is an assembled reinforced concrete precast column connection structure, comprising an upper section of a lower precast column, a lower section of an upper precast column, a cushion block, a spiral positioning device, stirrups, a template, a support fixing piece, and post-cast high-strength concrete; the upper section of the lower precast column and the lower section of the upper precast column are arranged corresponding to each other, and the cushion block, the spiral positioning device, stirrups, the template, and the support fixing piece are arranged between the upper section of the lower precast column and the lower section of the upper precast column, the upper section of the lower precast column comprises a longitudinal reserved lap steel bar A, the lower section of the upper precast column comprises a longitudinal reserved lap steel bar B, and the longitudinal reserved lap steel bar A, the longitudinal reserved lap steel bar B, the stirrups and the template form a casting area; the upper section of the lower precast column, the lower section of the upper precast column, the cushion block, the spiral positioning device, the stirrups, the support fixing piece, etc. are solidified together by post-cast high-strength concrete to form an assembled reinforced concrete precast column connection structure.

[0005] Furthermore, the upper section of the lower prefabricated column also includes an embedded steel frame support frame, which includes an L-shaped main steel skeleton and a steel hoop. The L-shaped main steel skeleton is provided with four pieces and each has a screw opening and an internal thread. The four L-shaped main steel skeletons are fixed to the steel hoop and are cast in the factory with the longitudinal reserved lap steel bars A to form a lower prefabricated column including the upper section of the lower prefabricated column.

[0006] Furthermore, the lower section of the upper prefabricated column also includes a prefabricated core column, and the prefabricated core column includes prefabricated core column auxiliary steel bars and embedded sleeves. The longitudinal reserved lap steel bars B, prefabricated core column auxiliary steel bars, and embedded sleeves are cast in the factory to form an upper prefabricated column including the lower section of the upper prefabricated column.

[0007] Furthermore, the template is an ordinary disassembly template or a disassembly-free template; the template has a fixed opening, and the supporting fixings include bolts, bolts with sleeves, nuts, and washers; the supporting fixings are used to support and fix the template.

[0008] In summary, the utility model has the following beneficial technical effects:

[0009] The lower section of the upper prefabricated column is equipped with a prefabricated core column to replace the existing frame structure. The upper and lower adjacent prefabricated columns are temporarily supported by legs, which increases the overall stability of the upper prefabricated columns during construction and installation. The thickness of the pad is selected according to the elevation of the upper section of the lower prefabricated column and the requirements for post-casting compaction. The spiral positioning device of the embedded steel frame support frame is pre-installed on the inner thread to facilitate the precise positioning of the upper prefabricated column and the compaction of the post-cast concrete. High-strength concrete and steel bars are used for post-casting. The dislocation-tolerant connection technology of high-strength concrete and steel bars are used. Conventional technology HRB400 longitudinal tensile steel bars are used in C30 concrete. The anchorage length is 35d (Code for Design of Concrete Structures GB50010-2022), and the anchorage length of HRB400 longitudinal tension steel bars in CF120 high-strength concrete is 11d (Technical Code for Dislocation Connection of Steel Bars in Prefabricated Concrete Structures T / CECS1222-2022), reducing the lap and anchorage length by more than 2 / 3; the steel bars use high-strength concrete dislocation connection technology to replace the existing extruded sleeve connection technology to avoid difficulties in alignment during installation and insufficient grouting in the sleeve, reducing construction difficulty, ensuring project quality, and improving assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a vertical cross-sectional structural schematic diagram of an embodiment of an assembled reinforced concrete prefabricated column connection structure of the utility model;

[0011] Figure 2 yes Figure 1 Schematic diagram of the upper structure of the middle and lower prefabricated columns;

[0012] Figure 3 yes Figure 2 Schematic diagram of the structure of the embedded steel frame support frame;

[0013] Figure 4 yes Figure 1 Schematic diagram of the lower section structure of the middle and upper prefabricated columns;

[0014] Figure 5 yes Figure 1 Schematic diagram of the AA section;

[0015] Figure 6 yes Figure 5 Schematic diagram of the structure of the embedded steel frame support frame;

[0016] Figure 7 yes Figure 5 Schematic diagram of the template structure;

[0017] Figure 8 yes Figure 5 Schematic diagram of the prefabricated core column structure.

[0018] The utility model discloses an embodiment of an assembled reinforced concrete prefabricated column connection structure.

[0019] Description of reference numerals:

[0020] 1. Prefabricated column connection structure; 2. Upper section of lower prefabricated column; 3. Lower section of upper prefabricated column; 4. Spacer; 5. Spiral positioning device; 6. Hoop reinforcement; 7. Formwork; 8. Support fixtures; 9. Embedded steel frame support frame; 10. Longitudinal reserved lap reinforcement A; 11. L-shaped main steel skeleton; 12. Steel hoop; 13. Opening and internal thread; 14. Prefabricated core column; 15. Longitudinal reserved lap reinforcement B; 16. Prefabricated core column auxiliary reinforcement; 17. Embedded sleeve; 18. Fixed opening; 19. Calcium silicate board non-disassembly formwork. DETAILED DESCRIPTION

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] Reference Figures 1 to 8 This embodiment includes a lower precast column upper section 2, an upper precast column lower section 3, a pad 4, a spiral positioning device 5, stirrups 6, a template 7, and a supporting fixture 8, and a precast column connection structure 1 is formed by post-casting high-strength concrete.

[0023] The upper section 2 of the lower prefabricated column includes an embedded steel frame support frame 9 and a longitudinal reserved lap steel bar A10; the embedded steel frame support frame 9 is composed of four L-shaped main steel skeletons 11 and steel hoops 12 on the outside of the L-shaped main steel skeletons 11; the four L-shaped main steel skeletons are provided with openings and inner threads 13 of the spiral positioning device 5 as required, and the four L-shaped main steel skeletons with the openings and inner threads 13 of the spiral positioning device 5 are welded and fixed with the outer steel hoops 12 as required, and are prefabricated and cast together with the longitudinal reserved lap steel bar A10 in the factory with the template set up to form the lower prefabricated column including the upper section 2 of the lower prefabricated column.

[0024] The lower section 3 of the upper prefabricated column includes a prefabricated core column 14 and longitudinal reserved lap steel bars B15; the prefabricated core column 14 is composed of prefabricated core column auxiliary steel bars 16 and embedded sleeves 17; after the longitudinal reserved lap steel bars B15, the prefabricated core column auxiliary steel bars 16, the embedded sleeves 17, etc. are fixed as required, formwork is set up in the factory, and prefabricated and cast together to form the upper prefabricated column including the lower section 3 of the upper prefabricated column.

[0025] The pad block 4 is located between the upper section 2 of the lower prefabricated column and the lower section 3 of the upper prefabricated column adjacent to the prefabricated column connection structure 1. The pad block 4 is selected with a suitable thickness and is located above the middle part of the upper section 2 of the lower prefabricated column according to the elevation of the upper section 2 of the lower prefabricated column and the requirements for post-pouring compaction. It adjusts the upper and lower elevation positions of the lower section 3 of the upper prefabricated column and withstands the pressure transmitted to the upper section 2 of the lower prefabricated column when the lower section 3 of the upper prefabricated column is installed.

[0026] The spiral positioning device 5 is installed on the screw openings and internal threads 13 set as required on the four L-shaped main steel skeletons. After the upper prefabricated column is hoisted, the prefabricated core column 14 and the front, back, left, and right horizontal positions of the lower section 3 of the upper prefabricated column are adjusted as required through the L-shaped main steel skeleton with four screw openings and internal threads 13, and it plays the role of temporarily fixing the front, back, left, and right horizontal positions of the lower section 3 of the upper prefabricated column when the lower section 3 of the upper prefabricated column is installed.

[0027] The stirrups 6 are located between the upper section 2 of the lower precast column and the lower section 3 of the upper precast column adjacent to the precast column connection structure 1, and are also located outside the adjacent longitudinal reserved lap steel bars A10 and B15 and wrap the reserved longitudinal lap steel bars together.

[0028] The template 7 is a calcium silicate board non-disassembly template 19 with a dovetail groove on one side and a pre-opened fixed opening 18. The side of the calcium silicate board non-disassembly template with the dovetail groove faces the inner side of the connection node to facilitate pouring into a whole with concrete; the supporting fixing parts 8 include bolts, sleeve bolts, nuts, and gaskets.

[0029] The template 7 is installed and fixed on the embedded sleeve 17 and the prefabricated column connection structure 1 around the adjacent lower prefabricated column upper section 2 and the upper prefabricated column lower section 3 through the supporting fixing parts 8; the longitudinal reserved lap steel bars A10 of the adjacent lower prefabricated column upper section 2 and the longitudinal reserved lap steel bars B15 of the upper prefabricated column lower section 3, the stirrups 6 and the high-strength concrete cast in the area surrounded by the surrounding templates 7 together constitute the assembled reinforced concrete prefabricated column connection structure 1.

[0030] The construction method of the assembled reinforced concrete prefabricated column connection structure of the utility model is as follows:

[0031] 1. Purchase or make the embedded steel frame support frame 9 of the upper section 2 of the lower prefabricated column and the longitudinal reserved lap steel bars A10 of the upper section 2 of the lower prefabricated column and other materials; the embedded steel frame support frame 9 is composed of four L-shaped main steel frames and steel hoops 12 connecting parts on the outer side of the L-shaped main steel frames; the four L-shaped main steel frames are provided with screw holes and inner threads 13 as required, and the four L-shaped main steel frames with screw holes and inner threads 13 are welded and fixed with the outer steel hoops 12 as required, and are prefabricated and cast together with the reserved longitudinal lap steel bars of the upper section 2 of the lower prefabricated column in the factory to form the lower prefabricated column including the upper section 2 of the lower prefabricated column;

[0032] 2. Purchase or make the longitudinal reserved lap steel bars B15, the auxiliary steel bars of the prefabricated core column 14, and the embedded sleeve 17 of the lower section 3 of the upper prefabricated column; after the longitudinal reserved lap steel bars B15, the auxiliary steel bars of the prefabricated core column 14, and the embedded sleeve 17 of the lower section 3 of the upper prefabricated column are fixed as required, formwork is set up in the factory, etc., and prefabricated and cast together to form the upper prefabricated column including the lower section 3 of the upper prefabricated column;

[0033] 3. Purchase or make pads 4, spiral positioning devices 5, and stirrups 6 according to design requirements;

[0034] 4. Purchase or make the template 7 according to the design requirements. The template 7 is a calcium silicate board non-disassembly template 19 with a prefabricated fixed opening 18 and a dovetail groove on one side;

[0035] 5. Purchase or make support fixings 8 according to design requirements. The support fixings 8 include bolts, sleeve bolts, nuts, washers, etc.;

[0036] 6. The lower prefabricated columns are transported to the construction site, and the lower prefabricated columns are installed and fixed according to the design requirements. After the installation or construction of the lower beams and slabs is completed and the upper construction conditions are met, according to the elevation of the upper section 2 of the lower prefabricated columns and the post-casting compaction requirements, a cushion block 4 of appropriate thickness is selected on the upper section 2 of the lower prefabricated columns and placed on the middle part of the upper section 2 of the lower prefabricated columns, a spiral positioning device 5 is pre-installed on the screw openings and the inner threads 13 on the embedded steel frame support frame 9, and stirrups 6 are pre-placed on the outer side of the reserved longitudinal lap steel bars A on the upper section 2 of the lower prefabricated columns;

[0037] 7. The upper prefabricated columns are transported to the construction site. The prefabricated core columns 14 of the lower section 3 of the upper prefabricated columns are hoisted and placed on the cushion blocks 4 above the middle of the upper section 2 of the lower prefabricated columns according to the design requirements. The upper and lower elevation positions of the prefabricated core columns 14 of the lower section 3 of the upper prefabricated columns are finely adjusted by the thickness of the cushion blocks 4, and the horizontal positions of the prefabricated core columns 14 of the lower section 3 of the upper prefabricated columns and the front, back, left, and right sides of the lower section 3 of the upper prefabricated columns are finely adjusted by the spiral positioning device 5.

[0038] 8. Install stirrups 6 according to design requirements;

[0039] 9. Install the supporting fixtures 8 and formwork 7 according to the design requirements. The formwork 7 is fixed to the embedded sleeve 17 of the prefabricated core column 14 of the upper prefabricated column lower section 3 and around the lower prefabricated column upper section 2 and the upper prefabricated column lower section 3 through the supporting fixtures 8. The calcium silicate board non-disassembly formwork has a dovetail groove silicon side facing the inner side of the connection node to facilitate pouring with concrete as a whole; high-strength concrete is poured in the area surrounded by the adjacent lower prefabricated column upper section 2 and the upper prefabricated column lower section 3 and the reserved longitudinal lap steel bars, stirrups 6 and the surrounding formwork 7 to complete the construction of the prefabricated reinforced concrete prefabricated column connection node.

[0040] The above are all preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited thereto. Among them, the same parts are represented by the same figure marks. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively. Therefore: All equivalent changes made according to the structure, shape, and principle of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. An assembled reinforced concrete prefabricated column connection structure, characterized in that: The invention comprises a lower prefabricated column upper section (2), an upper prefabricated column lower section (3), a cushion block (4), a spiral positioning device (5), stirrups (6), a template (7), a supporting fixture (8), and post-cast high-strength concrete; the lower prefabricated column upper section (2) and the upper prefabricated column lower section (3) are arranged corresponding to each other, and the cushion block (4), the spiral positioning device (5), stirrups (6), the template (7), and the supporting fixture (8) are arranged on the lower prefabricated column upper section (2) and The upper precast column upper section (2) comprises longitudinal reserved lap steel bars A (10), the upper precast column lower section (3) comprises longitudinal reserved lap steel bars B (15), and the longitudinal reserved lap steel bars A (10), the longitudinal reserved lap steel bars B (15), the stirrups (6) and the formwork (7) form a casting area; the lower precast column upper section (2), the upper precast column lower section (3), the cushion block (4) are cast by post-casting high-strength concrete. , a spiral positioning device (5), a stirrup (6), and a supporting fixture (8) are solidified together to form an assembled reinforced concrete prefabricated column connection structure; the upper section (2) of the lower prefabricated column also includes a pre-buried steel frame support frame (9), the pre-buried steel frame support frame (9) includes an L-shaped main steel frame (11) and a steel hoop (12), the L-shaped main steel frame (11) is provided with four pieces and each of them has a screw opening and an internal thread (13), the four L-shaped main steel frames (11) The upper section (2) of the lower prefabricated column is fixed with a steel hoop (12) and cast in a factory with a longitudinal reserved lap steel bar A (10); the lower section (3) of the upper prefabricated column further comprises a prefabricated core column (14), the prefabricated core column (14) comprises a prefabricated core column auxiliary steel bar (16) and a pre-embedded sleeve (17); the longitudinal reserved lap steel bar B (15), the prefabricated core column auxiliary steel bar (16), and the pre-embedded sleeve (17) are cast in a factory to form the lower section (3) of the upper prefabricated column.

2. The prefabricated reinforced concrete column connection structure according to claim 1, characterized in that: The template (7) is a common template that needs to be disassembled or a template that does not require disassembly; the template (7) has a fixing opening (18); the supporting fixing member (8) comprises a bolt, a bolt with a sleeve, a nut, and a gasket; the supporting fixing member (8) is used to support and fix the template (7).

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