Supporting-free connecting joint of column and foundation

Abstract

The utility model relates to a support-free connecting joint of a column and a foundation. The support-free connecting joint comprises a prefabricated column, the prefabricated foundation, combined profile steel and a post-pouring concrete section. The combined profile steel comprises two pieces of pre-embedded profile steel which are pre-embedded in the prefabricated column and the prefabricated foundation respectively; the pre-embedded section steel comprises a pre-embedded section, an exposed section and an end plate, the pre-embedded section is pre-embedded in the prefabricated column or the prefabricated foundation, the exposed section extends out of the prefabricated column or the prefabricated foundation, the end plate is connected to the end of the exposed section, and the end plates of the two pre-embedded section steel abut against each other and are in bolted connection; vertical steel bars extending outwards are arranged in the prefabricated columns and the prefabricated foundations, and the vertical steel bars of the prefabricated columns and the vertical steel bars of the prefabricated foundations are connected through cold extrusion sleeves. The post-pouring concrete section is located between the prefabricated column and the prefabricated foundation and surrounds the exposed section. An additional supporting structure does not need to be arranged, the overall construction amount is reduced, and the construction efficiency is improved; the requirement on the operation precision is low, and the construction is more convenient.

Description

Technical Field

[0001] The present application relates to the technical field of prefabricated buildings, and in particular to a support-free connection node between a column and a foundation. Background Art

[0002] Since the on-site construction speed of prefabricated buildings is fast and efficient, it can minimize environmental pollution and has been widely used in various construction scenarios. The utility model with announcement number CN210289267U discloses an assembled platform canopy, whose columns and foundations are all prefabricated structures and are connected by grouting sleeves. However, the grouting sleeve connection technology has high requirements for construction precision, and the quality is difficult to control. In addition, temporary support structures need to be set up to support the prefabricated columns before and after the connection construction. Therefore, there are defects such as high construction precision requirements and the need to set up temporary supports, which affect the quality and construction efficiency. Utility Model Content

[0003] Based on this, it is necessary to provide a support-free connection node between the column and the foundation, and its specific technical solution is as follows.

[0004] A support-free connection node between a column and a foundation, comprising: a precast column, a precast foundation, a composite steel section and a post-cast concrete section; the composite steel section comprises two embedded steel sections respectively embedded in the precast column and the precast foundation; the embedded steel section comprises an embedded section, an exposed section and an end plate, the embedded section is embedded in the precast column or the precast foundation, the exposed section extends outward from the precast column or the precast foundation, the end plate is connected to the end of the exposed section, and the end plates of the two embedded steel sections are abutted and bolted; the precast column and the precast foundation are both provided with vertical steel bars extending outward, and the vertical steel bars of the precast column and the precast foundation are connected by a cold-extruded sleeve; the post-cast concrete section is located between the precast column and the precast foundation and surrounds the exposed section.

[0005] Furthermore, the end face of the vertical steel bar does not extend beyond the end face of the end plate away from the exposed section.

[0006] Furthermore, the embedded section includes an embedded plate and an embedded column, the embedded plate is connected to the embedded column, and the outer contour size of the embedded plate is larger than the outer contour size of the embedded column.

[0007] Furthermore, the embedded plate includes a first embedded plate and a second embedded plate, and the first embedded plate and the second embedded plate are arranged at intervals; the first side of the first embedded plate is against the first horizontal steel bar, and the second side of the second embedded plate is against the second horizontal steel bar; the first side of the first embedded plate is opposite to the second side of the second embedded plate; annular stirrups are tied to the vertical steel bars, and the first horizontal steel bar and the second horizontal steel bar are tied to the annular stirrups respectively.

[0008] Furthermore, the first horizontal steel bars and the second horizontal steel bars are arranged crosswise.

[0009] Furthermore, the number of the first horizontal steel bars is two, and the two first horizontal steel bars are arranged on both sides of the embedded column; the number of the second horizontal steel bars is also two, and the two second horizontal steel bars are arranged on both sides of the embedded column.

[0010] Furthermore, the exposed section includes an exposed column and a reinforcing steel plate, one end of the reinforcing steel plate is connected to the end plate, and the other end is connected to the embedded plate; multiple reinforcing steel plates are arranged around the exposed column and connected to the exposed column.

[0011] Furthermore, a center positioning structure is provided between the two embedded steel sections, and the center positioning structure includes a positioning protrusion provided on one end plate and a positioning through hole provided on the other end plate; the outer contour of the positioning protrusion is a first circular guide bevel, and the inner wall of the positioning through hole is provided with a second guide bevel that cooperates with the first guide bevel.

[0012] Furthermore, the outer contour size of the positioning protrusion gradually decreases in the direction away from the end plate.

[0013] Furthermore, a bolt hole is provided on the end plate, and the bolt hole is in an arc shape with the center of the positioning protrusion as a circle.

[0014] Beneficial Effects: The utility model provides a support-free connection node between a column and a foundation. During assembly, two pre-embedded steel sections are connected by bolting two end plates. The combined steel sections formed by the two pre-embedded steel sections support and limit the prefabricated column, eliminating the need for additional support structures, reducing overall construction workload and improving construction efficiency. The use of cold-extruded sleeves to connect vertical steel bars reduces the precision requirements of the operation and makes construction more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 A schematic diagram of connecting nodes;

[0017] Figure 2 This is a schematic diagram of the precast foundation;

[0018] Figure 3 This is a schematic diagram of a precast column;

[0019] Figure 4This is a schematic diagram of a pre-buried steel section;

[0020] Figure 5 This is a schematic diagram of the connection between the steel structure and the embedded steel;

[0021] Figure 6 This is a schematic diagram of the decomposition of two embedded steel sections.

[0022] Explanation of reference numerals: 1. Precast column; 2. Precast foundation; 3. Composite steel; 4. Post-cast concrete section;

[0023] 11. Vertical reinforcement; 12. Cold extruded sleeve; 13. First horizontal reinforcement; 14. Second horizontal reinforcement; 15. Circular stirrups;

[0024] 31. Embedded section; 32. Exposed section; 33. End plate;

[0025] 311. First embedded plate; 312. Second embedded plate; 313. Embedded column;

[0026] 321. Exposed columns; 322. Reinforced steel plates;

[0027] 331. Positioning protrusion; 332. First guiding slope; 333. Positioning through hole; 334. Second guiding slope; 335. Bolt hole. DETAILED DESCRIPTION

[0028] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0031] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0032] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0034] Example

[0035] Reference Figure 1 As shown, this embodiment provides a support-free connection node between a column and a foundation, comprising a precast column 1, a precast foundation 2, a composite steel section 3, and a post-cast concrete segment 4. In this embodiment, the precast column 1 and the precast foundation 2 are both reinforced concrete structures, prefabricated outside the construction site and then transported to the construction site for assembly.

[0036] Specifically, refer to Figures 1 to 3As shown, the composite steel section 3 includes two embedded steel sections, one of which is embedded in the precast column 1, and the other is embedded in the precast foundation 2. Both embedded steel sections include an embedded section 31, an exposed section 32, and an end plate 33. The embedded section 31 is embedded in the precast column 1 or the precast foundation 2, and the exposed section 32 extends outward from the precast column 1 or the precast foundation 2. The end plate 33 is connected to the end plate 33 of the exposed section 32, and the end plates 33 of the two embedded steel sections are abutted against each other and then bolted together, thereby supporting and positioning the precast column 1. The precast column 1 and the precast foundation 2 are both provided with vertical steel bars 11 extending outward, and the vertical steel bars 11 of the precast column 1 and the precast foundation 2 are connected by a cold-extruded sleeve 12; the post-cast concrete section 4 is located between the precast column 1 and the precast foundation 2 and surrounds the exposed section 32.

[0037] When assembling the precast column 1 and precast foundation 2, the two end plates 33 are first abutted and bolted together. A cold-extruded sleeve 12 is pre-installed over the vertical reinforcement 11 of the precast column 1 or precast foundation 2. After aligning the two sets of reinforcement, the cold-extruded sleeve 12 is moved until it partially fits over the other section of vertical reinforcement 11. The sleeve is then cold-extruded to connect the vertical reinforcement 11 at both ends. Finally, the post-cast concrete section 4 is poured to complete the connection between the precast column 1 and precast foundation 2.

[0038] This embodiment provides a support-free connection node between a column and a foundation. During assembly, two pre-embedded steel sections are connected by bolting two end plates 33. The combined steel sections 3, consisting of the two pre-embedded steel sections, support and limit the prefabricated column 1, eliminating the need for additional support structures. This reduces overall construction effort and improves efficiency. The use of cold-extruded sleeves 12 to connect the vertical steel bars 11 reduces operational precision requirements and facilitates construction.

[0039] Specifically, the end face of the vertical steel bar 11 does not extend beyond the end face of the end plate 33 away from the exposed section 32. When the two end plates 33 abut each other, the vertical steel bars 11 are prevented from overlapping, ensuring that the two aligned vertical steel bars 11 can be connected by the cold extrusion sleeve 12.

[0040] Specifically, in this embodiment, the embedded sections 31 of the two embedded steel sections have exactly the same structure. Therefore, in this embodiment, the connection structure between the reinforcement structure of the prefabricated column 1 and the embedded steel section is used as an example for illustration.

[0041] Reference Figure 4 and Figure 5 As shown, the embedded section 31 includes an embedded plate and an embedded column 313. The embedded plate is connected to the embedded column 313, and the outer contour of the embedded plate is larger than the outer contour of the embedded column 313. By providing the embedded plate with an outer contour larger than the embedded column 313, the bonding strength between the embedded steel section and the prefabricated column 1 is enhanced.

[0042] Specifically, the embedded plate includes a first embedded plate 311 and a second embedded plate 312, and the first embedded plate 311 and the second embedded plate 312 are arranged at intervals; the first side of the first embedded plate 311 abuts against the first horizontal steel bar 13, and the second side of the second embedded plate 312 abuts against the second horizontal steel bar 14; the first side of the first embedded plate 311 is opposite to the second side of the second embedded plate 312. Assuming that the side where the first embedded plate 311 and the second embedded plate 312 are close to each other is defined as the inner side, the first horizontal steel bar 13 and the second horizontal steel bar 14 are located on the inner side of the first embedded plate 311 and the second embedded plate 312, or on the outer side at the same time. Annular stirrups 15 are tied to the vertical steel bars 11, and the first horizontal steel bars 13 and the second horizontal steel bars 14 are tied to the annular stirrups 15 respectively. The position of a certain annular stirrup 15 can be set to correspond to the height position of the horizontal steel bar. By setting the first horizontal steel bar 13 and the second horizontal steel bar 14, the vertical position of the embedded part can be positioned without welding, and the operation is simple and convenient.

[0043] Specifically, the first horizontal steel bars 13 and the second horizontal steel bars 14 are arranged crosswise. There are two first horizontal steel bars 13, which are arranged on opposite sides of the embedded column 313. There are also two second horizontal steel bars 14, which are arranged on opposite sides of the embedded column 313. The two first horizontal steel bars 13 and the two second horizontal steel bars 14 can simultaneously limit the position of the embedded steel sections in two horizontal directions.

[0044] Specifically, continue to refer to Figure 4 As shown, the exposed section 32 includes an exposed column 321 and a reinforcing steel plate 322. One end of the reinforcing steel plate 322 is connected to the end plate 33, and the other end is connected to the embedded plate. Multiple reinforcing steel plates 322 are arranged around and connected to the exposed column 321. The provision of the reinforcing steel plates 322 increases the rigidity of the embedded steel section, ensuring stable support during assembly.

[0045] Specifically, a central positioning structure is provided between the two embedded steel sections. Figure 6 As shown, the center positioning structure includes a positioning protrusion 331 provided on one end plate 33 and a positioning through-hole 333 provided on the other end plate 33. The outer contour of the positioning protrusion 331 is a circular first guiding slope 332, and the inner wall of the positioning through-hole 333 is provided with a second guiding slope 334 that cooperates with the first guiding slope 332. The outer contour of the positioning protrusion 331 gradually decreases as it moves away from the end plate 33. During the docking process of the precast column 1 and the precast foundation 2, the center positioning structure guides the precast column 1 and the precast foundation 2, ensuring alignment of the holes in the end plates.

[0046] Specifically, the end plate 33 is provided with a bolt hole 335, which is arc-shaped and centered around the positioning protrusion 331. By providing the arc-shaped bolt hole 335, it is sufficient to ensure that the center of the precast column 1 is aligned with the precast foundation 2, which reduces the alignment accuracy requirements for the bolt hole 335, reduces construction difficulty, and improves construction efficiency.

[0047] Assembly process of prefabricated column 1 and prefabricated foundation 2:

[0048] Lift the precast column 1, aligning the end plates 33 on the embedded steel sections and bolting the two end plates 33. Temporary support is no longer necessary, and the crane can be removed to maintain the stability of the precast column 1. Move the cold-extruded sleeves 12 so that they are respectively plugged into the aligned vertical reinforcement bars 11, and cold-extrude the cold-extruded sleeves 12. Support the area between the precast column 1 and the precast foundation 2 with formwork, and reserve a bell mouth. Cast the post-cast concrete section 4 through the bell mouth, and repair the concrete at the bell mouth after curing and demolding.

[0049] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A support-free connection node between a column and a foundation, characterized in that: include: Precast columns, precast foundations, composite steel sections and post-cast concrete sections; the composite steel section comprises two embedded steel sections respectively embedded in the precast column and the precast foundation; the embedded steel section comprises an embedded section, an exposed section and an end plate, the embedded section is embedded in the precast column or the precast foundation, the exposed section extends outward from the precast column or the precast foundation, the end plate is connected to the end of the exposed section, and the end plates of the two embedded steel sections are abutted and bolted; the precast column and the precast foundation are both provided with vertical steel bars extending outward, and the vertical steel bars of the precast column and the precast foundation are connected by a cold-extruded sleeve; the post-cast concrete section is located between the precast column and the precast foundation and surrounds the exposed section.

2. A support-free connection node between a column and a foundation according to claim 1, characterized in that: The end surface of the vertical steel bar does not extend beyond the end surface of the end plate away from the exposed section.

3. A support-free connection node between a column and a foundation according to claim 1, characterized in that: The embedded section includes an embedded plate and an embedded column. The embedded plate is connected to the embedded column, and the outer contour size of the embedded plate is larger than the outer contour size of the embedded column.

4. A support-free connection node between a column and a foundation according to claim 3, characterized in that: The embedded plate includes a first embedded plate and a second embedded plate, and the first embedded plate and the second embedded plate are arranged at intervals; the first side of the first embedded plate is against the first horizontal steel bar, and the second side of the second embedded plate is against the second horizontal steel bar; the first side of the first embedded plate is opposite to the second side of the second embedded plate; annular stirrups are tied to the vertical steel bars, and the first horizontal steel bar and the second horizontal steel bar are tied to the annular stirrups respectively.

5. A support-free connection node between a column and a foundation according to claim 4, characterized in that: The first horizontal steel bars and the second horizontal steel bars are arranged crosswise.

6. A support-free connection node between a column and a foundation according to claim 5, characterized in that: There are two first horizontal steel bars, which are arranged on both sides of the embedded column. There are also two second horizontal steel bars, which are arranged on both sides of the embedded column.

7. A support-free connection node between a column and a foundation according to claim 3, characterized in that: The exposed section includes an exposed column and a reinforcing steel plate, one end of the reinforcing steel plate is connected to the end plate, and the other end is connected to the embedded plate; a plurality of reinforcing steel plates are arranged around the exposed column and connected to the exposed column.

8. The support-free connection node between a column and a foundation according to claim 1, characterized in that: A center positioning structure is provided between the two embedded steel sections, and the center positioning structure includes a positioning protrusion provided on one end plate and a positioning through hole provided on the other end plate; the outer contour of the positioning protrusion is a first circular guide inclined surface, and the inner wall of the positioning through hole is provided with a second guide inclined surface that cooperates with the first guide inclined surface.

9. A support-free connection node between a column and a foundation according to claim 8, characterized in that: The outer contour size of the positioning protrusion gradually decreases in a direction away from the end plate.

10. A support-free connection node between a column and a foundation according to claim 8, characterized in that: The end plate is provided with a bolt hole, and the bolt hole is in an arc shape with the center of the positioning protrusion as a circle.

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