A foundation connection structure for precast concrete columns and precast buildings
Patent Information
- Application Number
- CN202521853939.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-29
- Publication Date
- 2026-09-01
- Estimated Expiration
- 2035-08-29
AI Technical Summary
然而，经过工程实践检验，该传统连接方式因连接结构导致施工工序繁琐复杂，制约了装配式建筑的施工效率
本申请中的预制混凝土柱的基础连接结构通过预设在一期混凝土基础内的地脚锚栓与预设有柱脚型钢的预制混凝土柱进行连接，整个连接结构更加简单且连接更便捷，从而能够在一定程度上简化预制混凝土柱与基础的连接，提高了装配式建筑的施工效率。
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Figure CN224705280U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of prefabricated building technology, specifically to a foundation connection structure for a precast concrete column and a precast building. Background Technology
[0002] In the field of prefabricated concrete construction, the traditional connection between precast columns and foundations typically employs a "grouting sleeve connection" technique. The basic procedure is as follows: during the pouring of the concrete foundation, vertical reinforcing bars for the column are pre-embedded; during the factory prefabrication of the concrete column, a steel node with a built-in grouting sleeve is pre-embedded at its lower end. During on-site installation, the precast column is hoisted into position, ensuring the foundation reinforcing bars are precisely inserted into the grouting sleeve at the column base. High-strength grout is then injected into the sleeve's inner cavity, and concrete is poured at the horizontal joint between the column base and the top surface of the foundation, forming a complete connection section. Subsequent construction of the upper floors can only proceed after the grout and the subsequent concrete have reached their design strength. However, engineering practice has shown that this traditional connection method, due to its complex connection structure, results in cumbersome and complex construction procedures, hindering the construction efficiency of prefabricated buildings. Summary of the Invention
[0003] The first aspect of this application provides a foundation connection structure for a precast concrete column, which simplifies the connection between the precast concrete column and the foundation.
[0004] The foundation connection structure of the precast concrete column provided in the first aspect of this application includes: a column base steel, which is fixedly and pre-set at the end of the precast concrete column. The column base steel has a preset length, and a part of the column base steel is located inside the precast concrete column, while another part is exposed at the end of the precast concrete column. An end plate is provided at the end of the column base steel away from the precast concrete column, and a plurality of mounting holes are provided through the end plate. Multiple anchor bolts are fixedly embedded in the primary concrete foundation. Each anchor bolt has a J-shaped bend on one side of its bottom and an exposed top side extending beyond the primary concrete foundation, where a leveling nut is provided. The column base steel is connected to the anchor bolts. In this connected state, an end plate passes through the anchor bolt and is positioned on top of the primary concrete foundation. The end plate is connected to the anchor bolt via a fixing nut screwed onto the anchor bolt.
[0005] In addition, the foundation connection structure of the precast concrete column provided in this application also has the following additional technical features: In one alternative embodiment, the column base steel has a rectangular cross-sectional shape, and a plurality of studs are spaced apart on the sidewall of the column base steel. The studs are spaced apart along the length and width of the sidewall of the column base steel, and the studs are connected to the column base steel through through holes provided in the sidewall of the column base steel.
[0006] In one alternative embodiment, the surface area of the end plate is larger than the cross-sectional area of the column base steel, and the connection between the end plate and the column base steel is provided with end plate stiffening ribs. The end plate stiffening ribs include a plurality of first stiffening ribs located on the side wall of the column base steel and a plurality of second stiffening ribs located at the corner positions of the column base steel.
[0007] In one alternative embodiment, the foundation connection structure of the precast concrete column further includes a secondary concrete foundation, which is cast on top of the primary concrete foundation, and the column base steel is at least partially located within the secondary concrete foundation; the J-shaped bend of the anchor bolt faces the outer wall of the primary concrete foundation.
[0008] In one alternative embodiment, a column connector is provided at the end of the precast concrete column away from the column base steel. Multiple longitudinal reinforcement bars are spaced apart inside the precast concrete column, with the longitudinal reinforcement bars extending along the length of the precast concrete column. The multiple longitudinal reinforcement bars are arranged in a frame shape inside the precast concrete column and connected by stirrups. The portion of the column base steel located inside the precast concrete column is welded to the longitudinal reinforcement bars.
[0009] The second aspect of this application provides a prefabricated building, the prefabricated building including prefabricated concrete columns, the prefabricated concrete columns being connected using the foundation connection structure of the prefabricated concrete columns provided in the first aspect.
[0010] The beneficial effects of this application are as follows: The foundation connection structure of the precast concrete column in this application connects the precast concrete column with the precast column base steel by anchor bolts pre-installed in the first-phase concrete foundation. The entire connection structure is simpler and the connection is more convenient, which can simplify the connection between the precast concrete column and the foundation to a certain extent and improve the construction efficiency of prefabricated buildings.
[0011] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description
[0012] Figure 1 A schematic diagram of the final structure of the foundation connection structure of the precast concrete column provided in this application; Figure 2 for Figure 1Schematic diagram of the connection structure between the central column base steel and the anchor bolts; Figure 3 This is a schematic diagram of the connection structure between the anchor bolts and the first-phase concrete foundation.
[0013] Attached reference numerals: 1. Column base steel, 11. End plate, 12. Stud, 13. First stiffening rib, 14. Second stiffening rib, 2. Precast concrete column, 21. Column longitudinal reinforcement, 3. Anchor bolt, 31. J-shaped bend, 32. Leveling nut, 4. Phase I concrete foundation, 5. Phase II concrete foundation, 6. Column-to-column connector.
[0014] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation
[0015] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.
[0016] It should be understood that the described embodiments are merely some embodiments of this application, and not all embodiments. All other technical solutions obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0017] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.
[0018] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.
[0019] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.
[0020] like Figure 1-3As shown, the first aspect of this application provides a foundation connection structure for a precast concrete column, which mainly includes column base steel 1 and multiple anchor bolts 3. The column base steel 1 is fixedly embedded at the end of the precast concrete column 2. The column base steel 1 has a predetermined length, with a portion inside the precast concrete column 2 and the other portion exposed at the end of the precast concrete column 2. An end plate 11 is provided at the end of the column base steel 1 away from the precast concrete column 2, and multiple mounting holes are provided through the end plate 11. The anchor bolt 3 is fixedly embedded in the first-phase concrete foundation 4. A J-shaped bend 31 is provided on one side of the bottom of the anchor bolt 3, and the top side of the anchor bolt 3 is exposed at the top of the first-phase concrete foundation 4 and is provided with a leveling nut 32. The column base steel 1 and the multiple anchor bolts 3 are connected. In the connected state, the end plate 11 passes through the anchor bolt 3 and is arranged on the top of the first-phase concrete foundation 4. The end plate 11 and the anchor bolt 3 are connected by a fixing nut screwed onto the anchor bolt 3.
[0021] In this embodiment, the foundation connection structure of the precast concrete column is connected to the precast concrete column 2 with the precast column base steel 1 by anchor bolts 3 pre-installed in the first-stage concrete foundation 4. The entire connection structure is simpler and the connection is more convenient, which can simplify the connection between the precast concrete column 2 and the foundation to a certain extent and improve the construction efficiency of prefabricated buildings.
[0022] like Figure 1-2 As shown, in one specific embodiment, the column base steel 1 has a rectangular cross-sectional shape, and a plurality of studs 12 are spaced apart on the side wall of the column base steel 1. The studs 12 are spaced apart along the length and width of the side wall of the column base steel 1, and the studs 12 are connected to the column base steel 1 through through holes provided in the side wall of the column base steel 1.
[0023] The stud 12 can significantly enhance the bond strength and shear resistance between the column base steel 1 and the foundation structure (the secondary concrete foundation 5 below) after installation, prevent relative slippage between the two, ensure that the load is effectively transferred from the concrete to the column base steel 1, and improve the integrity and seismic performance of the joint.
[0024] like Figure 1-2As shown, in one specific embodiment, the surface area of the end plate 11 is larger than the cross-sectional area of the column base steel 1. End plate stiffening ribs are provided at the connection between the end plate 11 and the column base steel 1. These stiffening ribs include multiple first stiffening ribs 13 located on the sidewalls of the column base steel 1, and multiple second stiffening ribs 14 located at the corners of the column base steel 1. The enlarged end plate 11 provides ample space for the anchor bolts 3, enhancing the stability of the joint. The stiffening ribs (first stiffening ribs 13 and second stiffening ribs 14) provide strong support for the end plate 11 and the column base steel 1, effectively preventing excessive bending deformation of the end plate 11 under the action of huge column base bending moments and shear forces. This ensures that the pressure can be reliably transmitted to the foundation, significantly improving the stiffness and load-bearing capacity of the joint.
[0025] like Figure 1-3 As shown, in one specific embodiment, the foundation connection structure of the precast concrete column also includes a secondary concrete foundation 5, which is poured and installed on top of the primary concrete foundation 4. The column base steel 1 is at least partially located within the secondary concrete foundation 5; the J-shaped bend 31 of the anchor bolt 3 faces the outer wall of the primary concrete foundation 4. The pouring of the secondary concrete provides all-round protection for the connection area of the column base steel 1, avoiding exposed metal parts from rusting and improving durability. The orientation design of the J-shaped bend 31 places its anchoring end within the constraint zone of the foundation's outer concrete, maximizing the anchoring effect of the concrete on the anchor bolt, further enhancing the anchor bolt's pull-out resistance, and making the connection safer and more reliable.
[0026] like Figure 1 As shown, in one specific embodiment, a column connector 6 is provided at the end of the precast concrete column 2 away from the column base steel 1. Multiple column longitudinal bars 21 are provided at intervals inside the precast concrete column 2. The length direction of the column longitudinal bars 21 extends along the length direction of the precast concrete column 2. The multiple column longitudinal bars 21 are arranged in a frame shape inside the precast concrete column 2 and connected by stirrups. The part of the column base steel 1 located inside the precast concrete column 2 is welded to the column longitudinal bars 21.
[0027] In this embodiment, the column base steel 1 and the main load-bearing steel bars (column longitudinal bars 21) inside the column are strongly connected by welding, ensuring that the load of the precast concrete column 2 itself can be smoothly transferred to the column base steel 1 through the longitudinal bars, and then transferred to the foundation through the end plate 11, realizing a clear, continuous and efficient force transmission path. The design of the column connector 6 at the upper end ensures the convenience and standardization of connection with the upper precast column, making this structure easy to promote into a complete precast column system solution.
[0028] The foundation connection structure of the precast concrete column in this embodiment can be constructed according to the following steps: 1) First, embed the anchor bolt 3 in the first-phase concrete foundation 4 at the construction site. After the concrete reaches the required strength, align the mounting hole on the end plate 11 with the anchor bolt 3 and insert it. 2) Tighten the fixing nuts initially to connect the precast concrete column 2 with the column base steel 1 to the anchor bolt 3, and then adjust the verticality of the precast concrete column 2 by adjusting the leveling nut 32 on the anchor bolt 3. 3) Pour the second-stage concrete foundation 5, and install the superstructure after it reaches the required strength.
[0029] The second aspect of this application provides a prefabricated building, which includes prefabricated concrete columns 2, wherein the prefabricated concrete columns 2 are connected using the foundation connection structure for prefabricated concrete columns provided in the first aspect embodiment. Since the foundation connection structure for prefabricated concrete columns in the first aspect embodiment simplifies the connection between the prefabricated concrete columns 2 and the foundation to a certain extent, improving the construction efficiency of prefabricated buildings, the overall connection of the prefabricated building is simpler, and the construction efficiency is also improved to a certain extent.
[0030] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A foundation connection structure for a precast concrete column, characterized in that, include: Column base steel (1), the column base steel (1) is fixedly preset at the end of the precast concrete column (2), the column base steel (1) has a preset length, and a part of the column base steel (1) is located inside the precast concrete column (2), and another part is exposed at the end of the precast concrete column (2). An end plate (11) is provided at the end of the column base steel (1) away from the precast concrete column (2), and multiple mounting holes are provided through the end plate (11). Multiple anchor bolts (3) are fixedly embedded in the first-phase concrete foundation (4). A J-shaped bend (31) is provided on one side of the bottom of the anchor bolt (3). The top side of the anchor bolt (3) is exposed on the top of the first-phase concrete foundation (4) and is provided with a leveling nut (32). The column base steel (1) is connected to the multiple anchor bolts (3). In the connected state, the end plate (11) passes through the anchor bolt (3) and is arranged on the top of the first-phase concrete foundation (4). The end plate (11) is connected to the anchor bolt (3) by screwing the fixing nut of the anchor bolt (3).
2. The foundation connection structure for precast concrete columns according to claim 1, characterized in that, The column base steel (1) has a rectangular cross-sectional shape. Multiple studs (12) are spaced apart on the side wall of the column base steel (1). The studs (12) are spaced apart along the length and width of the side wall of the column base steel (1). The studs (12) are connected to the column base steel (1) through through holes provided on the side wall of the column base steel (1).
3. The foundation connection structure for precast concrete columns according to claim 1 or 2, characterized in that, The surface area of the end plate (11) is greater than the cross-sectional area of the column base steel (1). The end plate stiffening rib is provided at the connection between the end plate (11) and the column base steel (1). The end plate stiffening rib includes a plurality of first stiffening ribs (13) located on the side wall of the column base steel (1) and a plurality of second stiffening ribs (14) located at the corner of the column base steel (1).
4. The foundation connection structure for precast concrete columns according to claim 3, characterized in that, It also includes a second-stage concrete foundation (5), which is poured and installed on top of the first-stage concrete foundation (4), and the column base steel (1) is at least partially located inside the second-stage concrete foundation (5); the J-shaped bend (31) of the anchor bolt (3) faces the outer wall of the first-stage concrete foundation (4).
5. The foundation connection structure for precast concrete columns according to claim 1, 2, or 4, characterized in that, The precast concrete column (2) is provided with a column connector (6) at one end away from the column base steel (1). Multiple column longitudinal bars (21) are provided at intervals inside the precast concrete column (2). The length direction of the column longitudinal bars (21) extends along the length direction of the precast concrete column (2). The multiple column longitudinal bars (21) are arranged in a frame shape inside the precast concrete column (2) and connected by stirrups. The part of the column base steel (1) located inside the precast concrete column (2) is welded to the column longitudinal bars (21).
6. A prefabricated building, said prefabricated building comprising prefabricated concrete columns, characterized in that, The precast concrete column (2) is connected using the foundation connection structure of the precast concrete column (2) according to any one of claims 1-5.