Precast concrete semi-hollow column component

Abstract

The utility model discloses a precast concrete semi-hollow column component, a precast column is divided into a hollow section and a semi-hollow section, a precast area and a hollow cast-in-place area are arranged in each of the hollow section and the semi-hollow section, so that the whole self weight of the precast column is light, the precast column is convenient to transport and hoist, and compared with a solid column, the semi-hollow section at the lower part of the precast column has the advantages that the structure is simple, and the cost is low. The area, needing to be filled with high-strength grouting materials, of the column bottom is smaller, and economical efficiency is better; meanwhile, the section surface area of the second prefabricated area in the semi-hollow section is larger than that of the first prefabricated area in the hollow section, so that the weight of the semi-hollow section is larger than that of the hollow section, the gravity center of the prefabricated column is relatively low, the prefabricated column is not prone to overturning during installation, and the overall stability of the prefabricated column is improved; and the prefabricated column can better bear the load.

Description

Technical Field

[0001] The utility model relates to the technical field of building engineering, in particular to a prefabricated concrete semi-hollow column component. Background Art

[0002] Prefabricated buildings refer to buildings that are partially or completely prefabricated in factories, such as beams and columns, and then transported to the construction site by appropriate means of transportation. Reliable installation methods and installation machinery are used to assemble the components to form a functional building. Prefabricated buildings have the advantages of high construction efficiency, short construction period, and reduced construction noise and dust pollution, and are widely used in the construction industry.

[0003] A Chinese patent application with publication number CN 115874761 A discloses a prefabricated assembled concrete hollow column, which includes a steel cage and a concrete prefabricated area formed around the steel cage by a centrifugal method; the steel cage includes a plurality of longitudinal steel bars located in the concrete prefabricated area and extending along the axial direction of the hollow column, and stirrups connected between the longitudinal steel bars; a hollow cast-in-place area is formed inside the concrete prefabricated area, and the stirrups extend into the hollow cast-in-place area, thereby making the prefabricated column lightweight.

[0004] However, in the prefabricated columns provided in the above scheme, the column bottom is reinforced, and the retention after installation is relatively poor, requiring other auxiliary measures, and the pouring of concrete below the column bottom requires formwork, which adds a construction process.

[0005] A Chinese patent with publication number CN 209244097 U discloses a prefabricated hollow column, comprising a first column section and a second column section connected to each other, wherein the first column section is a solid concrete block, and the second column section comprises a concrete shell and an internal hollow cavity, so that the solid concrete block of the first column section can achieve structural stability of the prefabricated column, but also increases the weight of the prefabricated column, which is inconvenient for transportation and hoisting of the prefabricated column.

[0006] Therefore, how to effectively reduce the dead weight of prefabricated columns, facilitate transportation and lifting, and conveniently and stably connect them to other components to improve connection reliability has become an urgent problem to be solved in this field. Utility Model Content

[0007] In view of the defects of the prior art, the purpose of the utility model is to provide a prefabricated concrete semi-hollow column component with light weight, stable structure, convenient and reliable connection.

[0008] In order to achieve the above-mentioned object, the precast concrete semi-hollow column component provided by the utility model comprises a precast column, wherein the precast column is provided with longitudinal steel bars arranged along the length direction of the precast column and stirrups perpendicular to the longitudinal steel bars.

[0009] The prefabricated column is configured to form a hollow section with an integrated structure and a semi-hollow section arranged at the bottom of the hollow section along the length direction of the prefabricated column.

[0010] A first prefabricated area is formed inside the hollow section along the length direction of the prefabricated column, and a first cast-in-place area is formed in the middle of the first prefabricated area in the form of a hollow column.

[0011] A second prefabricated area is formed inside the semi-hollow section along the length direction of the prefabricated column, and a second cast-in-place area is formed in the middle of the second prefabricated area in the form of a hollow column.

[0012] The cross-sectional area of ​​the first cast-in-place area in the hollow section is larger than the cross-sectional area of ​​the second cast-in-place area in the semi-hollow section, so that the surface area of ​​the first prefabricated area is smaller than the surface area of ​​the second prefabricated area, the bottom surface of the first prefabricated area abuts against the top surface of the second prefabricated area, and the first cast-in-place area and the second cast-in-place area are connected.

[0013] Furthermore, a grouting sleeve is provided at the bottom of the semi-hollow section, and the longitudinal steel bars pass through the first prefabricated area and the second prefabricated area to connect the grouting sleeve.

[0014] Furthermore, the longitudinal reinforcement extends out of the top of the first prefabricated area.

[0015] Furthermore, the stirrups are distributed along the length direction of the prefabricated column, and are arranged in the first prefabricated area and the second prefabricated area, extending to the first cast-in-place area and the second cast-in-place area.

[0016] Furthermore, the distribution spacing of the stirrups in the second prefabricated area is smaller than the distribution spacing of the stirrups in the first prefabricated area.

[0017] Furthermore, the first prefabricated area of ​​the hollow section is provided with an air hole connecting the first cast-in-place area and the outside of the first prefabricated area, and the second prefabricated area of ​​the semi-hollow section is provided with an air hole connecting the second cast-in-place area and the outside of the second prefabricated area.

[0018] Furthermore, the air holes are evenly distributed in the first prefabricated area and the second prefabricated area along the length direction of the hollow section and the semi-hollow section, respectively.

[0019] Furthermore, the bottom surface of the semi-hollow segment and the top surface of the hollow segment are configured as rough surfaces.

[0020] Furthermore, the inner surfaces of the semi-hollow segment and the hollow segment are configured as rough surfaces.

[0021] Furthermore, mounting bosses are provided at both ends of the top of the prefabricated column.

[0022] The precast concrete semi-hollow column component provided by the utility model divides the precast column into a hollow section and a semi-hollow section. The hollow section and the semi-hollow section are both provided with a precast area and a hollow cast-in-place area, so that the overall dead weight of the precast column is relatively light, which is convenient for transportation and hoisting. Moreover, compared with a solid column, the semi-hollow section at the lower part of the precast column requires a smaller area of ​​high-strength grouting material to be poured at the bottom of the column, and is more economical. At the same time, the cross-sectional surface area of ​​the second precast area in the semi-hollow section is larger than that of the first precast area in the hollow section, so that the weight of the semi-hollow section is heavier than that of the hollow section, thereby making the center of gravity of the precast column relatively low, and it is not easy to overturn during installation, so as to improve the overall stability of the precast column. After the cast-in-place area is poured with concrete, the precast column will be able to better withstand the load. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below in conjunction with the accompanying drawings and specific implementations.

[0024] Figure 1 A cross-sectional view of the precast concrete semi-hollow column member provided by the utility model

[0025] Figure 2 It is a top view of the precast concrete semi-hollow column component in the utility model;

[0026] Figure 3 It is a bottom view of the precast concrete semi-hollow column component in the utility model;

[0027] Figure 4 It is a schematic diagram of the matching structure of the hollow section and the semi-hollow section of the utility model;

[0028] Figure 5 It is a schematic diagram of the reinforcement arrangement of the precast concrete semi-hollow column member in the utility model;

[0029] Figure 6 This is a schematic diagram of the connection between the precast concrete semi-hollow column component and the composite beam in the utility model;

[0030] Reference numerals:

[0031] 1. Prefabricated column; 11. Longitudinal reinforcement; 12. Stirrups; 13. Mounting boss;

[0032] 2. Hollow section; 21. First prefabricated area; 22. First cast-in-place area; 23. Air vent;

[0033] 3. Semi-hollow section; 31. Second prefabricated area; 32. Second cast-in-place area; 33. Grouting sleeve;

[0034] 4. Composite beam. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0036] See also Figure 1 , which shows an example of the prefabricated concrete semi-hollow column component provided by the utility model.

[0037] As can be seen from the figure, the precast concrete semi-hollow column component of this example includes a precast column 1, which is configured to form a hollow section 2 with an integrated structure along the length direction and a semi-hollow section 3 arranged at the bottom of the hollow section 2. Both the hollow section 2 and the semi-hollow section 3 are provided with a precast area and a hollow cast-in-place area, so that the overall dead weight of the precast column 1 is relatively light, which is convenient for transportation and lifting. At the same time, the precast area in the semi-hollow section 3 is relatively large, so that the weight of the semi-hollow section 3 is larger than that of the hollow section 2, thereby improving the structural stability of the precast column 1 during installation.

[0038] Specifically, a first prefabricated area 21 is formed inside the hollow section 2 along the length direction of the prefabricated column 1, prefabricated concrete is arranged in the first prefabricated area 21, the middle part of the first prefabricated area 21 is a first hollow cylinder, and the first hollow cylinder forms a first cast-in-place area 22 of the hollow section 2. Correspondingly, a second prefabricated area 31 is formed inside the semi-hollow section 3 along the length direction of the prefabricated column 1, prefabricated concrete is arranged in the second prefabricated area 31, the middle part of the second prefabricated area 31 is a second hollow cylinder, and the second hollow cylinder forms a second cast-in-place area 32 of the semi-hollow section 3.

[0039] Furthermore, combined with Figures 1 to 3 The hollow section 2 and the semi-hollow section 3 are integrated structures, and the cross-sectional area of ​​the first cast-in-place area 22 in the hollow section 2 is larger than the cross-sectional area of ​​the second cast-in-place area 32 in the semi-hollow section 3, so that the surface area of ​​the first precast area 21 in the hollow section 2 is smaller than the surface area of ​​the second precast area 31 in the semi-hollow section 3, so that the volume of the second precast area 31 in the semi-hollow section 3 is larger, that is, the volume of the precast concrete in the semi-hollow section 3 is larger than the volume of the precast concrete in the hollow section 2, so as to increase the weight of the semi-hollow section 3. When the precast column 1 is transported to the site and connected with other components, the precast column 1 is erected on the site. Since the weight of the semi-hollow section 3 in the lower half of the precast column 1 is larger, the precast column 1 is not easy to overturn.

[0040] Furthermore, the hollow section 2 is preferably arranged at the upper 2 / 3 of the prefabricated column 1, and the semi-hollow section 3 is preferably arranged at the lower 1 / 3 of the prefabricated column 1, so that the center of gravity of the prefabricated column 1 is lower, thereby making the structure of the prefabricated column 1 stable and improving the connection reliability of the prefabricated column 1 with other components.

[0041] Also, see Figure 4The bottom surface of the first prefabricated area 21 in the hollow section 2 abuts against the top surface of the second prefabricated area 31 in the semi-hollow section 3, and the first cast-in-place area 22 is connected to the second cast-in-place area 32, so that when the prefabricated column 1 is connected with other connecting components, concrete is poured into the first cast-in-place area 22, and the concrete can flow into the second cast-in-place area 32 through the first cast-in-place area 22, and gradually fill the second cast-in-place area 32 and the first cast-in-place area 22 of the entire prefabricated column 1 from low to high along the height direction of the prefabricated column 1, so that when the cast-in-place concrete respectively connects the second cast-in-place area 32 and the second prefabricated area 31 of the semi-hollow section 3, and the first cast-in-place area 22 and the first prefabricated area 21 of the hollow section 2, the semi-hollow section 3 and the hollow section 2 are simultaneously connected to form the prefabricated column 1 as a whole.

[0042] Combination Figures 1 to 5 In order to improve the bearing capacity of the prefabricated column 1, the prefabricated column 1 is provided with longitudinal steel bars 11 arranged along the length direction of the prefabricated column 1. The longitudinal steel bars 11 respectively pass through the first prefabricated area 21 of the hollow section 2 and the second prefabricated area 31 of the semi-hollow section 3, are evenly arranged on the inner periphery of the prefabricated column 1, and extend out of the top of the first prefabricated area 21 to facilitate connection with other components.

[0043] Furthermore, after pouring concrete into the first cast-in-place area 22 and the second cast-in-place area 32 and connecting the semi-hollow section 3 and the hollow section 2 to form the precast column 1 as a whole, the longitudinal steel bars 11 can cooperate with the precast concrete in the first precast area 21 and the second precast area 22, and the cast-in-place concrete in the first cast-in-place area 22 and the second cast-in-place area 32 to bear the load together, thereby improving the bearing capacity of the precast column 1.

[0044] In coordination therewith, a grouting sleeve 33 is provided at the bottom of the semi-hollow section 3, and the longitudinal steel bars 11 pass through the first prefabricated area 21 and the second prefabricated area 31 and are inserted into the grouting sleeve 33. After the grouting in the grouting sleeve 33 is cured, the longitudinal steel bars 11 will be firmly fixed in the grouting sleeve 33, thereby realizing the connection between the longitudinal steel bars 11 and the grouting sleeve 33, so that when the prefabricated column 1 is subjected to external force, the force of the prefabricated column 1 can be transmitted to the grouting sleeve 33 through the longitudinal steel bars 11, and then transmitted to the longitudinal steel bars 11 of the next layer of columns by the grouting sleeve 33, thereby ensuring the normal operation of the prefabricated column 1.

[0045] Furthermore, the precast column 1 is also provided with stirrups 12 which are perpendicular to the longitudinal steel bars 11 and distributed along the length direction of the precast column 1. The stirrups 12 are arranged in the first precast area 21 and the second precast area 22, and extend to the first cast-in-place area 22 and the second cast-in-place area 32, so that the stirrups 12 can be connected with the longitudinal steel bars 11 to form a skeleton. When concrete is poured into the first cast-in-place area 22 and the second cast-in-place area 32 and the semi-hollow section 3 and the hollow section 2 are connected to form the precast column 1 as a whole, the stirrups 12 can cooperate with the longitudinal steel bars 11 to ensure the correct position of the longitudinal steel bars 11 and prevent the longitudinal steel bars 11 from being compressed after being subjected to force.

[0046] Specifically, the stirrups 12 are evenly distributed in the hollow section 2 and the semi-hollow section 3, respectively, and the distribution spacing of the stirrups 12 arranged in the semi-hollow section 3 is preferably smaller than the distribution spacing of the stirrups 12 arranged in the hollow section 2, so that the stirrups 12 in the semi-hollow section 3 are distributed more densely and the distance between adjacent stirrups 12 is closer, so that the interaction between the stirrups 12 is stronger and a solid network can be better formed. At the same time, the volume of the second prefabricated area 31 in the semi-hollow section 3 is larger, and the tightly distributed stirrups 12 can be interconnected and cooperated with the second prefabricated area, thereby improving the structural stability of the semi-hollow section 3, thereby improving the bearing capacity and seismic resistance of the prefabricated column 1.

[0047] Since air pores are easily generated in the precast column 1 when pouring concrete into the first cast-in-place area 22 and the second cast-in-place area 32, if these air pores are not removed in time, the casting quality of the precast column 1 will be affected. Therefore, air holes 23 are provided in the first precast area 21 and the second precast area 31.

[0048] Specifically, the air holes 23 are preferably horizontally arranged in the first prefabricated area 21 and the second prefabricated area 31, respectively connecting the first cast-in-place area 22 and the through holes outside the first prefabricated area 21, the second cast-in-place area 32 and the second prefabricated area 31, and are evenly distributed in the first prefabricated area 21 and the second prefabricated area 31 along the length direction of the hollow section 2 and the semi-hollow section 3, so that the air holes 23 can discharge the air between the stirrups 12 and the cast-in-place concrete in the first cast-in-place area 22 and the second cast-in-place area 32, as well as the air brought in when pouring concrete, increase the contact surface between the stirrups 12 and the cast-in-place concrete, and strengthen the connection between the stirrups 12 and the cast-in-place concrete.

[0049] Furthermore, mounting bosses 13 are provided at both ends of the top of the hollow section 2 of the prefabricated column 1, so that other components can be erected on the prefabricated column 1 and cooperate with the mounting bosses 13. The mounting bosses 13 can support other components, eliminating the need for installation and removal of temporary mounting supports.

[0050] Specifically, the mounting bosses 13 are arranged at both ends of the top of the prefabricated column 1, and the width of the mounting bosses 13 is adapted to or slightly larger than the width of other components, so that when the other components and the prefabricated column 1 are perpendicular to each other in the horizontal plane, the connecting ends of the other components can be placed on the mounting bosses 13 on the prefabricated column 1, and the mounting bosses 13 can support the other components, so that the connection between the other components and the prefabricated column 1 is stable, eliminating the installation and removal of temporary installation supports.

[0051] In order to prevent other components 4 from being unable to maintain levelness and tilting when erected on the prefabricated column 1, a height adjustment pad can also be provided between the mounting boss 13 and other components, so that the height adjustment pad can adjust the height of other components erected on the prefabricated column 1, thereby keeping other components and the prefabricated column 1 level and improving the stability and flatness of the connection node.

[0052] In order to ensure that the prefabricated column 1 can be firmly connected with other components and to improve the tightness of the connection nodes between the prefabricated column 1 and other components, the top surface of the hollow section 2 of the prefabricated column 1 (the top surface of the first prefabricated area 21), the bottom surface of the semi-hollow section 3 (the bottom surface of the second prefabricated area 31) and the inner surface of the prefabricated column 1 are configured as rough surfaces, so that when the prefabricated column 1 is connected with other components, the rough surfaces can increase the friction between the prefabricated column 1 and other components, thereby improving the stability and seismic resistance of the connection nodes.

[0053] Here, the cross-sectional shapes of the precast column 1 and the first cast-in-place area 22 and the second cast-in-place area 32 in the precast column 1 are not limited, and the cross-sectional shapes of the precast column 1, the first cast-in-place area 22 and the second cast-in-place area 32 can be set to be the same or different. In this example, the precast column 1, the first cast-in-place area 22 and the second cast-in-place area 32 are all rectangular cross-sectional shapes to facilitate mutual coordination and connection with other components. As an example, the precast column 1 can also be set to other forms of cross-sectional shapes according to specific circumstances, such as a circular cross-sectional shape. Accordingly, the first cast-in-place area 22 and the second cast-in-place area 32 can be set to the same circular cross-sectional shape or square cross-sectional shape, or the first cast-in-place area 22 is set to a circular cross-sectional shape, and the second cast-in-place area 32 is set to a square cross-sectional shape. Adaptive adjustments can be made according to specific circumstances, and it is necessary to ensure that the cross-sectional shape of the second cast-in-place area 32 is larger than the cross-sectional shape of the first cast-in-place area 22.

[0054] The following examples illustrate the working process of the present invention in a specific application. It should be noted that the following content is only a specific application example of the present solution and does not constitute a limitation to the present solution.

[0055] See also Figure 6 , taking the connection between the prefabricated column 1 and the composite beam 4 as an example.

[0056] Transport the prefabricated column 1 to the construction site and hoist it to the corresponding elevation.

[0057] The top of the first prefabricated area 21 in the hollow section 2 of the longitudinal reinforcement 11 in the prefabricated column 1 is conveniently connected to the composite beam 4 , and the composite beam 4 is placed on both sides of the protruding section of the longitudinal reinforcement 11 .

[0058] The precast column 1 is erected on site. Since the semi-hollow section 3 of the lower half of the precast column 1 is heavy, the center of gravity of the precast column 1 is low and it is not easy to tip over, so that the structure of the precast column 1 is stable and the connection between the precast column 1 and the composite beam 4 is reliable.

[0059] After the prefabricated column 1 is supported and fixed, the grouting sleeve 33 is grouted.

[0060] Concrete is poured into the connection node between the precast column 1 and the composite beam 4, and the cast-in-place concrete flows through the first cast-in-place area 22 of the hollow section 2 to the second cast-in-place area 32 of the semi-hollow section 3. The cast-in-place concrete gradually fills the second cast-in-place area 32 and the first cast-in-place area 22 of the entire precast column 1 from low to high along the height direction of the precast column 1, so that when the cast-in-place concrete connects the second cast-in-place area 32 and the second precast area 31 of the semi-hollow section 3, and the first cast-in-place area 22 and the first precast area 21 of the hollow section 2, the semi-hollow section 3 and the hollow section 2 are simultaneously connected to form the whole precast column 1.

[0061] The precast concrete semi-hollow column component provided by the utility model adopts a precast column 1 divided into a hollow section 2 and a semi-hollow section 3, so as to achieve lightweight self-weight. At the same time, the hollow section 2 and the semi-hollow section 3 cooperate to form the precast column 1 as a whole, and ensure the structural stability and strength reliability of the precast column 1.

[0062] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A precast concrete semi-hollow column component, comprising a precast column, wherein the precast column is provided with longitudinal reinforcements arranged along the length direction of the precast column and stirrups perpendicular to the longitudinal reinforcements, characterized in that: The prefabricated column is configured to form a hollow section with an integrated structure and a semi-hollow section arranged at the bottom of the hollow section along the length direction of the prefabricated column. A first prefabricated area is formed inside the hollow section along the length direction of the prefabricated column, and a first cast-in-place area is formed in the middle of the first prefabricated area in the form of a hollow column. A second prefabricated area is formed inside the semi-hollow section along the length direction of the prefabricated column, and a second cast-in-place area is formed in the middle of the second prefabricated area in the form of a hollow column. The cross-sectional area of ​​the first cast-in-place area in the hollow section is larger than the cross-sectional area of ​​the second cast-in-place area in the semi-hollow section, so that the surface area of ​​the first prefabricated area is smaller than the surface area of ​​the second prefabricated area, the bottom surface of the first prefabricated area abuts against the top surface of the second prefabricated area, and the first cast-in-place area and the second cast-in-place area are connected.

2. The precast concrete semi-hollow column member according to claim 1, characterized in that: A grouting sleeve is provided at the bottom of the semi-hollow section, and the longitudinal steel bars pass through the first prefabricated area and the second prefabricated area to connect with the grouting sleeve.

3. The precast concrete semi-hollow column member according to claim 2, characterized in that: The longitudinal reinforcement extends out from the top of the first prefabricated area.

4. The precast concrete semi-hollow column member according to claim 1, characterized in that: The stirrups are distributed along the length direction of the prefabricated column, and are arranged in the first prefabricated area and the second prefabricated area, extending to the first cast-in-place area and the second cast-in-place area.

5. The precast concrete semi-hollow column member according to claim 4, characterized in that: The distribution spacing of the stirrups in the second prefabricated area is smaller than the distribution spacing of the stirrups in the first prefabricated area.

6. The precast concrete semi-hollow column member according to claim 1, characterized in that: The first prefabricated area of ​​the hollow section is provided with an air hole connecting the first cast-in-place area and the outside of the first prefabricated area, and the second prefabricated area of ​​the semi-hollow section is provided with an air hole connecting the second cast-in-place area and the outside of the second prefabricated area.

7. The precast concrete semi-hollow column member according to claim 6, characterized in that: The air holes are evenly distributed in the first prefabricated area and the second prefabricated area along the length direction of the hollow section and the semi-hollow section respectively.

8. The precast concrete semi-hollow column member according to claim 1, characterized in that: The bottom surface of the semi-hollow segment and the top surface of the hollow segment are configured as rough surfaces.

9. The precast concrete semi-hollow column member according to claim 1, characterized in that: The inner surfaces of the semi-hollow segment and the hollow segment are configured as rough surfaces.

10. The precast concrete semi-hollow column member according to claim 1, characterized in that: Both ends of the top of the prefabricated column are provided with mounting bosses.

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