Column structure for fabricated cross hollow beam building floor

Abstract

The utility model discloses a column structure for an assembly type crossed hollow beam building floor, and belongs to the technical field of building structure engineering. The column structure comprises a cast-in-place base and a prefabricated column, the prefabricated column is located on the upper side of the cast-in-place base, the prefabricated column comprises a prefabricated middle column section, prefabricated middle column overhanging longitudinal bars are arranged at the two ends of the prefabricated middle column section, and a plurality of prefabricated solid web girders are arranged on the prefabricated middle column section at equal elevation; prefabricated middle column overhanging longitudinal bars at one end of the prefabricated middle column section are connected with overhanging stressed steel bars on the cast-in-place base through connecting pieces A, and connecting sections between the prefabricated middle column section and the cast-in-place base are further connected through a column cast-in-place section. The structural integrity of the upper and lower floor columns is guaranteed by prefabricating the middle column section, meanwhile, the requirement of the columns for construction precision is reduced, and the installation difficulty is small. Complex beam-column joints are incorporated into factory prefabrication, the problems that cast-in-place and vibration are difficult due to the fact that the number of steel bars at the joints is large are solved, and the joint quality is better guaranteed.

Description

Technical Field

[0001] The utility model relates to a column structure for assembled cross hollow beam building floors, belonging to the technical field of building structure engineering. Background Art

[0002] In recent years, with the continuous development of the country's social economy and the intensification of urbanization, the requirements for urban construction projects have become increasingly higher, requiring not only high quality but also efficient construction and environmental protection. Prefabricated buildings have been vigorously developed in this era, and the country's support for them has also increased year by year.

[0003] At present, the main structure of construction projects is still mainly cast-in-place, and prefabricated is relatively rare. In modern cities, the main structure of construction projects is cast-in-place. The transportation of building materials will inevitably affect the urban environment, and concrete pouring will produce noise, dust pollution and material waste. In addition, cast-in-place components require a certain amount of maintenance time before the next stage of construction can be carried out, which prolongs the construction project. In view of the above shortcomings of cast-in-place components, prefabricated components have shown incomparable advantages.

[0004] However, most of the current building structure columns are cast-in-place, and the quality of cast-in-place columns is uneven. In addition, for example, the prefabricated column components disclosed in the patent with publication number CN114382172A and the patent name of a fully assembled building and its construction method only prefabricate the column body in the factory, and the prefabricated column is vertically connected to the adjacent column segments with a grouting sleeve, which has high requirements for construction accuracy and grouting, and is difficult to install; the prefabricated column and the beam are connected on-site at the node, and then the concrete at the connection is cast again, but the node is often more complicated, not only with dense steel bars, but also difficult to operate on-site, it is difficult to ensure quality, and the construction progress is slow. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a column structure for assembled cross hollow beam building floors.

[0006] The utility model is realized through the following technical solutions:

[0007] A column structure for an assembled cross hollow beam building floor, the column comprising a cast-in-place base and a prefabricated column, the prefabricated column being located on the upper side of the cast-in-place base, the prefabricated column comprising a prefabricated center column section, both ends of the prefabricated center column section are provided with prefabricated center column outwardly extending longitudinal reinforcements, and a plurality of prefabricated solid beams are provided at the same elevation on the prefabricated center column section, the prefabricated center column outwardly extending longitudinal reinforcements at one end of the prefabricated center column section are connected to the outwardly extending stress-bearing steel bars on the cast-in-place base through a connector A, and the connection section between the prefabricated center column section and the cast-in-place base is also connected through the column cast-in-place section.

[0008] The cast-in-place base comprises a column foundation and a cast-in-place middle column section. The lower end of the cast-in-place middle column section is connected to the column foundation, and the upper end is provided with cast-in-place middle column outwardly extending longitudinal reinforcement.

[0009] After the cast-in-place center column outwardly extending longitudinal reinforcement on the cast-in-place center column section is connected to the precast center column outwardly extending longitudinal reinforcement at one end of the precast center column section through the connector A, the cast-in-place concrete is cast in the connection section between the cast-in-place center column section and the precast center column section to form a cast-in-place column section.

[0010] The prefabricated center column section is provided with 2, 3 or 4 prefabricated solid-web beams at the same elevation, and the prefabricated solid-web beams are located below the upper end surface of the prefabricated center column section.

[0011] The end of the prefabricated solid web beam away from the prefabricated center column section is provided with a prefabricated solid web beam outwardly extending longitudinal reinforcement.

[0012] The top of the prefabricated solid web beam is pre-embedded with beam-slab connecting ribs A, the exposed portion of the beam-slab connecting ribs A is in an inverted V shape, and the exposed height of the beam-slab connecting ribs A differs from the thickness of the cast-in-place floor slab by the thickness of the concrete protective layer.

[0013] The column cast-in-place section is located at the inflection point of the column.

[0014] The connecting member A is a sleeve.

[0015] The beneficial effects of the utility model are:

[0016] The extended longitudinal reinforcement of the prefabricated center column at the lower end of the prefabricated center column section is used to connect with the extended longitudinal reinforcement of the cast-in-place center column through a sleeve, and can be quickly connected with the cast-in-place base. Then, the connection section between the cast-in-place base and the prefabricated center column section is cast in-place concrete to form a cast-in-place column section, so as to realize the integral connection between the prefabricated center column section and the cast-in-place base; the extended longitudinal reinforcement of the prefabricated center column at the upper end of the prefabricated center column section is used to connect with the cast-in-place base of the upper layer of columns, which ensures the structural integrity of the upper and lower floor columns, and makes the columns have good structural bearing capacity, while reducing the requirements of the columns for construction accuracy and the installation difficulty. The prefabricated center column section and the prefabricated solid web beam can be cast and formed in a mold at one time, and the connection nodes of the prefabricated center column section and the prefabricated solid web beam are prefabricated in the factory. Compared with the existing prefabricated column components, the complex beam-column node is incorporated into the factory prefabrication, which solves the problems of on-site casting and vibration difficulties due to the large number of steel bars at the node. The node quality is more guaranteed, the node is safer and more reliable, and it can also save resources and reduce the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model when there are three prefabricated solid beams on the column;

[0018] Figure 2 It is a structural schematic diagram of the utility model when there are two prefabricated solid beams on the column;

[0019] Figure 3 It is a schematic diagram of the structure when there are 4 prefabricated solid beams on the column of the utility model;

[0020] Figure 4 It is a structural diagram of a prefabricated cross hollow beam building floor;

[0021] Figure 5 This is a schematic diagram of the structure of the prefabricated beams of the assembled cross hollow beam building floors.

[0022] In the figure: 1-column, 10-cast-in-place base, 100-column foundation, 101-cast-in-place middle column section, 102-cast-in-place middle column extending longitudinal reinforcement, 11-precast column, 110-precast middle column section, 111-precast middle column extending longitudinal reinforcement, 112-precast solid beam, 113-solid beam extending longitudinal reinforcement, 114-beam-slab connecting reinforcement A, 12-column cast-in-place section, 13-connector A, 2-precast beam, 200-solid beam extending longitudinal reinforcement, 3-cross hollow grid beam. DETAILED DESCRIPTION

[0023] The technical solution of the utility model is further described below, but the scope of protection required is not limited to the description.

[0024] like Figures 1 to 5 As shown, the utility model describes a column structure for an assembled cross hollow beam building floor, the column 1 comprises a cast-in-place base 10 and a prefabricated column 11, the prefabricated column 11 is located on the upper side of the cast-in-place base 10, the prefabricated column 11 comprises a prefabricated center column section 110, both ends of the prefabricated center column section 110 are provided with prefabricated center column extending longitudinal reinforcement 111, and a plurality of prefabricated solid beams 112 are provided at the same elevation on the prefabricated center column section 110, the prefabricated center column extending longitudinal reinforcement 111 at one end of the prefabricated center column section 110 is connected to the extending stress-bearing steel bars on the cast-in-place base 10 through a connector A13, and the connecting section between the prefabricated center column section 110 and the cast-in-place base 10 is also connected through the column cast-in-place section 12.

[0025] The prefabricated center column extending longitudinal reinforcement 111 at the lower end of the prefabricated center column section 110 is used to connect with the cast-in-place center column extending longitudinal reinforcement 102 through a sleeve, and can be quickly connected to the cast-in-place base 10, and then the connecting section between the cast-in-place base 10 and the prefabricated center column section 110 is cast-in-place concrete to form a column cast-in-place section 12, so that the prefabricated center column section 110 and the cast-in-place base 10 are integrally connected; the prefabricated center column extending longitudinal reinforcement 111 at the upper end of the prefabricated center column section 110 is used to connect with the cast-in-place base 10 of the column 1 on the upper floor, thereby ensuring the structural integrity of the columns 1 on the upper and lower floors, so that the column 1 has a good structural bearing capacity, while reducing the requirements for construction accuracy of the column 1, and the installation difficulty is small. The prefabricated center column section 110 and the prefabricated solid beam 112 can be cast in a mold at one time, and the connection nodes of the prefabricated center column section 110 and the prefabricated solid beam 112 are prefabricated in the factory. Compared with the existing prefabricated column components, the complex beam-column nodes are incorporated into the factory prefabrication, which solves the problems of on-site casting and vibration difficulties due to the large number of steel bars at the nodes. The node quality is more guaranteed, the nodes are safer and more reliable, and at the same time it can save resources and reduce construction costs.

[0026] Compared with the traditional cast-in-place column 1, the prefabricated column 11 is prefabricated in the factory in advance, and then hoisted on site to be spliced ​​with the cast-in-place base 10. The column 1 is convenient and efficient to construct, reducing operations such as formwork, brackets, and cast-in-place, thereby effectively reducing the project cost.

[0027] The cast-in-place base 10 comprises a column foundation 100 and a cast-in-place middle column section 101. The lower end of the cast-in-place middle column section 101 is connected to the column foundation 100, and the upper end is provided with a cast-in-place middle column extending longitudinal reinforcement 102. The cast-in-place base 10 is formed by cast-in-place concrete, which ensures the support stability of the cast-in-place base 10.

[0028] After the cast-in-place center column extending longitudinal reinforcement 102 on the cast-in-place center column section 101 is connected to the precast center column extending longitudinal reinforcement 111 at one end of the precast center column section 110 through the connector A13, the cast-in-place concrete of the connection section between the cast-in-place center column section 101 and the precast center column section 110 is cast in-place to form a column cast-in-place section 12. The column cast-in-place section 12 is used to wrap the precast center column extending longitudinal reinforcement 111, the sleeve and the cast-in-place center column extending longitudinal reinforcement 102 at the lower end of the precast center column section 110, and realize the connection between the precast column 11 and the cast-in-place base 10; the column cast-in-place section 12 is short and only requires a small amount of formwork, which saves formwork. At the same time, there are fewer wet operations for cast-in-place and a short maintenance period, which is conducive to saving manpower and improving the construction efficiency of the column structure used for the floor of the assembled cross hollow beam building.

[0029] The prefabricated center column section 110 is provided with 2, 3 or 4 prefabricated solid beams 112 at the same height, and the prefabricated solid beams 112 are located below the upper end surface of the prefabricated center column section 110. Figure 2As shown, when two prefabricated solid beams 112 are provided at the same height on the prefabricated center column section 110, and the two prefabricated solid beams 112 are perpendicular to each other, the prefabricated center column section 110 is assembled with the cast-in-place base 10 and used as a corner column. Figure 1 As shown, when three prefabricated solid beams 112 are provided at the same height on the prefabricated center column section 110, the prefabricated center column section 110 is assembled with the cast-in-place base 10 and used as a side center column. Figure 3 As shown, when four prefabricated solid beams 112 are provided at the same elevation on the prefabricated center column section 110, the prefabricated center column section 110 is assembled with the cast-in-place base 10 and used as the center column, and cross hollow grid beams 3 are installed on both sides of the center column.

[0030] The end of the prefabricated solid beam 112 away from the prefabricated middle column section 110 is provided with a prefabricated solid beam outward longitudinal reinforcement 113. The prefabricated solid beam outward longitudinal reinforcement 113 on the column 1 is used to connect with the solid beam outward longitudinal reinforcement 200 on the prefabricated beam 2 through a sleeve, or to connect with the outward reinforcement on the cross hollow grid beam 3, so that the column 1 is more convenient to assemble with the prefabricated beam 2 and the cross hollow grid beam 3, so as to quickly form an overall frame system.

[0031] The top of the prefabricated solid web beam 112 is pre-embedded with beam-slab connecting ribs A114, the exposed portion of the beam-slab connecting ribs A114 is in an inverted V shape, and the exposed height of the beam-slab connecting ribs A114 differs from the thickness of the cast-in-place floor slab by a thickness of the concrete protective layer. The beam-slab connecting ribs A114 are pre-embedded in the top of the prefabricated solid web beam 112, which is convenient for quickly identifying the position of the prefabricated column 11, and convenient for on-site hoisting of the prefabricated column 11, and can also connect the prefabricated solid web beam 112 with the cast-in-place floor slab as a whole, which can increase the construction speed, shorten the construction period, and reduce the construction cost.

[0032] The column cast-in-place section 12 is located at the inflection point of the column 1. The column cast-in-place section 12 is located at the inflection point of the column 1. After the prefabricated middle column outer longitudinal reinforcement 111 and the cast-in-place middle column outer longitudinal reinforcement 102 are mechanically connected through the sleeve, the column cast-in-place section 12 is cast-in-place by local formwork, which can not only better exert the compressive resistance of the column 1, but also does not affect its bending resistance.

[0033] The connecting member A13 is a sleeve.

[0034] The free ends of the cast-in-place center column extended longitudinal bars 102, the precast center column extended longitudinal bars 111 and the solid beam extended longitudinal bars 113 are all provided with external threads. The cast-in-place center column extended longitudinal bars 102, the precast center column extended longitudinal bars 111 and the solid beam extended longitudinal bars 113 are all stress-bearing steel bars, and the length of the external threads on each extended longitudinal bar is determined according to the load shared by the corresponding component.

Claims

1. A column structure for a floor of a prefabricated cross hollow beam building, characterized in that: The column (1) comprises a cast-in-place base (10) and a prefabricated column (11), wherein the prefabricated column (11) is located on the upper side of the cast-in-place base (10), and the prefabricated column (11) comprises a prefabricated middle column section (110), both ends of the prefabricated middle column section (110) are provided with prefabricated middle column outward longitudinal reinforcement (111), and a plurality of prefabricated solid beams (112) are provided at the same elevation on the prefabricated middle column section (110), the prefabricated middle column outward longitudinal reinforcement (111) at one end of the prefabricated middle column section (110) is connected to the outward stress-bearing reinforcement on the cast-in-place base (10) through a connecting piece A (13), and the connection section between the prefabricated middle column section (110) and the cast-in-place base (10) is also connected through the column cast-in-place section (12).

2. The column structure for assembled cross hollow beam building floors according to claim 1, characterized in that: The cast-in-place base (10) comprises a column foundation (100) and a cast-in-place middle column section (101); the lower end of the cast-in-place middle column section (101) is connected to the column foundation (100), and the upper end is provided with cast-in-place middle column outwardly extending longitudinal reinforcement (102).

3. The column structure for assembled cross hollow beam building floors according to claim 2, characterized in that: After the cast-in-place center column outer extending longitudinal reinforcement (102) on the cast-in-place center column section (101) is connected to the precast center column outer extending longitudinal reinforcement (111) at one end of the precast center column section (110) through the connecting piece A (13), the connecting section between the cast-in-place center column section (101) and the precast center column section (110) is cast-in-place concrete to form a cast-in-place column section (12).

4. The column structure for assembled cross hollow beam building floors according to claim 1, characterized in that: Two, three or four prefabricated solid beams (112) are arranged at the same elevation on the prefabricated center column section (110), and the prefabricated solid beams (112) are located below the upper end surface of the prefabricated center column section (110).

5. The column structure for assembled cross hollow beam building floors according to claim 1 or 4, characterized in that: The end of the prefabricated solid web beam (112) away from the prefabricated center column section (110) is provided with a prefabricated solid web beam externally extending longitudinal reinforcement (113).

6. The column structure for assembled cross hollow beam building floors as claimed in claim 1, 4 or 5, characterized in that: A beam-slab connecting rib A (114) is pre-buried at the top of the prefabricated solid web beam (112), the exposed portion of the beam-slab connecting rib A (114) is in an inverted V shape, and the exposed height of the beam-slab connecting rib A (114) differs from the thickness of the cast-in-place floor slab by a thickness of the concrete protective layer.

7. The column structure for assembled cross hollow beam building floors according to claim 1, characterized in that: The column cast-in-place section (12) is located at the inflection point of the column (1).

8. The column structure for assembled cross hollow beam building floors according to claim 1, characterized in that: The connecting member A (13) is a sleeve.

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