A connection structure between a steel pipe column and a reverse-construction steel column in a basement

Abstract

The present invention belongs to the field of construction engineering and is a connection structure between a steel pipe column and a reverse-construction steel column in a basement. The technical solution is as follows: a connection structure between a steel pipe column and a reverse-construction steel column in a basement, wherein the upper steel pipe column is coaxially inserted into the lower reverse-construction column in the basement, and a coaxial cross-axis force transmission plate is provided at the mutually inserted portion of the steel pipe column and the reverse-construction column. The mutually inserted portion and the cross-axis force transmission plate form a connection section, and the four limbs of the cross-axis force transmission plate pass through the outer wall of the reverse-construction column and extend to the outer wall of the steel pipe column; the connection between the cross-axis force transmission plate, the reverse-construction column and the steel pipe column adopts equal-strength or super-strength welding connection; the steel pipe column, the reverse-construction column and the connection section form an integral steel column of the basement, and reinforced concrete is poured inside and outside the integral steel column of the basement to form a basement steel-concrete column. This solves the problem of reliably connecting the steel pipe column with the reverse-construction column in the basement under reverse-construction conditions and transmitting the reverse-construction load and normal working load.

Description

Technical Field

[0001] The invention belongs to the field of construction engineering, and in particular relates to a connection structure of an upper steel pipe column and a reverse construction column in a basement. Background Art

[0002] The steel tubular columns of a steel frame structure must be inserted a certain length into the basement concrete columns to ensure the normal operation of the upper steel frame under normal working loads. This does not take into account the reverse construction loads and is only applicable to the forward construction method. However, the reverse construction method requires the installation of steel columns in the basement. The steel columns are inserted into the bottom piles to transmit the reverse construction loads of the basement. Finally, concrete is poured in the steel column positions to form steel tubular concrete columns to bear the normal working loads. Currently, the node where the steel tubular columns of the steel frame structure are inserted into the basement concrete columns does not consider the connection between the inserted steel tubular columns and the reverse construction steel columns, and cannot meet the construction requirements of the reverse construction method. Summary of the Invention

[0003] In response to the gaps in existing nodes and technologies, the present invention provides a connection structure between steel pipe columns and reverse-construction columns in the basement, which solves the problem of reliably connecting steel pipe columns with reverse-construction columns in the basement under reverse-construction conditions and transmitting reverse-construction loads and normal working condition loads.

[0004] The technical solution of the present invention is: a connection structure between a steel pipe column and a reverse-construction steel column in a basement, wherein the upper steel pipe column is coaxially inserted into the lower reverse-construction column in the basement, and coaxial cross-axis force transmission plates are provided at the mutually sleeved parts of the steel pipe column and the reverse-construction column, and the mutually sleeved parts and the cross-axis force transmission plate form a connection section, and the four limbs of the cross-axis force transmission plate pass through the outer wall of the reverse-construction column and extend to the outer wall of the steel pipe column; the connection between the cross-axis force transmission plate, the reverse-construction column and the steel pipe column adopts equal-strength or super-strength welding connection; the steel pipe column, the reverse-construction column and the connection section form an integral steel column of the basement, and reinforced concrete is poured inside and outside the integral steel column of the basement to form a basement steel-concrete column together.

[0005] Based on the above technical features: shear connectors are set on the outer wall of the integral steel columns of the basement.

[0006] Based on the above technical features: shear connectors are set on the inner wall of the basement part of the steel pipe column, and the shear connectors are located at the upper part of the connection section.

[0007] Based on the above technical features: an equal-strength or super-strong welded axial force transmission bottom plate is used as the bottom plate of the connecting section at the bottom of the steel pipe column and outside the wall of the reverse construction column.

[0008] Based on the above technical features: the steel pipe column is a round steel pipe or a rectangular steel pipe.

[0009] Based on the above technical features: the reverse construction columns are round steel tubes or rectangular steel tubes or lattice columns.

[0010] The beneficial effects of the present invention are:

[0011] 1. During the reverse construction stage, when only the basement integral steel columns exist, that is, when the basement integral steel columns are not outsourced and reinforced concrete is poured inside, the basement integral steel columns are guaranteed to safely and reliably transmit and withstand the reverse construction working load.

[0012] 2. During the normal load-bearing stage, when the reinforced concrete is poured inside and outside the basement integral steel column to form the basement steel concrete column,

[0013] Ensure that the basement steel-concrete columns can safely and reliably transmit and withstand normal working loads.

[0014] 3. The connection structure of the present invention is easy to construct and ensures structural safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the connection structure between the steel pipe column and the reverse-construction steel column in the basement.

[0016] Figure 2 This is a schematic diagram of the integral steel columns of the basement.

[0017] Figure 3 Schematic diagram of steel-concrete columns in the basement.

[0018] Figure 4 for Figure 3 AA section Figure 1 .

[0019] Figure 5 for Figure 3 AA section Figure 2 .

[0020] Figure 6 for Figure 3 BB cross section Figure 1 .

[0021] Figure 7 for Figure 3 BB cross section Figure 2 .

[0022] Figure 8 for Figure 3 BB cross section Figure 3 .

[0023] Figure 9 for Figure 3 BB cross section Figure 4 .

[0024] Figure 10 for Figure 3 BB cross section Figure 5 .

[0025] Figure 11 for Figure 3 CC profile Figure 1 .

[0026] Figure 12 for Figure 3 CC profile Figure 2 .

[0027] Figure 13 for Figure 3 CC profile Figure 3 .

[0028] Figure 14 for Figure 2 DD profile Figure 1 .

[0029] Figure 15 for Figure 2 DD profile Figure 2 .

[0030] Figure 16 for Figure 2 DD profile Figure 3 .

[0031] Figure 17 for Figure 2 DD profile Figure 4 .

[0032] Figure 18 for Figure 2 DD profile Figure 5 . DETAILED DESCRIPTION

[0033] The following is a further detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention and are not intended to limit the present invention.

[0034] In the description of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," and "outside" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0036] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0037] like Figure 1 As shown, the upper steel pipe column 1 is inserted downward into the basement at the top elevation a of the basement top plate structure 8, the reverse construction column 2 extends upward from the foundation, passes through the underground floor structure 9, and the upper steel pipe column 1 is coaxially sleeved outside the reverse construction column 2, that is, the reverse construction column extends upward on the underground floor and is inserted into the upper steel pipe column 1, and the steel pipe column 1 and the reverse construction column 2 are provided with coaxial cross-axis force transmission plates 3 in the mutual sleeve part, and the mutual sleeve part and the cross-axis force transmission plate 3 form a connecting section 5, and the four limbs of the cross-axis force transmission plate 3 pass through the outer wall of the reverse construction column 2 and extend to the outer wall of the steel pipe column 1; the connection between the cross-axis force transmission plate 3 and the reverse construction column 2 and the steel pipe column 1 adopts equal strength or super strength welding connection, and its function is to transmit the internal force of the steel pipe column 1 to the reverse construction column 2; the basement section of the steel pipe column 1 and the reverse construction column 2 including the connecting section 5 are formed as shown in the figure. Figure 2 The basement integral steel column shown in the figure is poured with reinforced concrete inside and outside the basement integral steel column to form a basement steel concrete column 7. The connecting section 5 can be as follows Figure 1 The setting shown is on the first underground floor, but it can also be set on other floors of the basement.

[0038] Figure 2 Shown are the monolithic basement steel columns, including the basement section of the steel tubular column 1 and the top-down column 2, including the connecting section 5. As an optimization, an equal-strength or super-strong welded axial force transfer plate 6 is welded to the bottom of the steel tubular column, outside the wall of the top-down column, serving as the bottom plate of the connecting section. This connects the steel tubular column 1 and the top-down steel column 2, directly transferring the axial force of the steel tubular column 1 to the concrete beneath the axial force transfer plate 6.

[0039] As an optimization, Figure 3As shown, shear connectors 4 are installed on the outer wall of the basement's integral steel column to better transfer the load of the steel pipe column 1 above the top elevation a of the basement roof structure 8 to the basement's steel-concrete column 7. Shear connectors 4 include shear keys, cylindrical head welds, channel steel, etc. For details, please refer to the relevant provisions on shear connectors in the "Steel Structure Design Standard" GB50017-2017. Shear connectors 4 can further be installed on the inner wall of the steel pipe column 1 in the basement, and shear connectors 4 are located above the connection section 5. Reinforced concrete is poured inside and outside the basement's integral steel column to form the basement's steel-concrete column 7.

[0040] The cross-section of the steel pipe column 1 can be Figure 4 The rectangular steel pipe column shown, or can be Figure 5 The circular steel pipe column shown.

[0041] The cross-section of the reverse construction column 2 can be Figure 11 round steel pipe column as shown, or Figure 12 Rectangular steel tube columns as shown, or Figure 13 Lattice columns shown.

[0042] The connecting section 5 is the mutually nested part of the steel pipe column 1 and the reverse construction column 2, plus a coaxial cross axial force transmission plate 3. As an optimization, an axial force transmission base plate 6 can be added. Figure 6 The rectangular steel pipe column 1 and the circular reverse construction column 2 are nested with each other; Figure 7 The circular steel pipe column 1 and the circular reverse construction column 2 are nested with each other; Figure 8 The circular steel pipe column 1 and the rectangular reverse construction column 2 are nested with each other; Figure 9 The rectangular steel pipe column 1 and the reverse construction column 2 in the form of a lattice column are nested with each other; Figure 10 The circular steel pipe column 1 and the reverse construction column 2 in the form of a lattice column are nested with each other.

[0043] Figure 14 A horizontal schematic diagram of a rectangular steel pipe column 1 and a circular reverse construction column 2 being nested with each other, with an axial force transmission base plate 6 at the bottom of the steel pipe column 1; Figure 15 A horizontal schematic diagram of a circular steel pipe column 1 and a circular reverse construction column 2, wherein the bottom of the steel pipe column 1 is provided with an axial force transmission base plate 6; Figure 16 A horizontal schematic diagram of a circular steel pipe column 1 and a rectangular reverse construction column 2 being nested with each other, with an axial force transmission base plate 6 at the bottom of the steel pipe column 1; Figure 17 A horizontal schematic diagram of a rectangular steel pipe column 1 and a reverse construction column 2 in the form of a lattice column being nested with each other, with an axial force transmission base plate 6 at the bottom of the steel pipe column 1; Figure 18 It is a horizontal schematic diagram of the axial force transmission base plate 6 at the bottom of the circular steel pipe column 1 when the reverse-construction column 2 in the form of a lattice column is nested with each other. Figures 14 to 18 In the embodiment, the axial force transmission base plate 6 does not extend into the reverse construction column 2.

[0044] Figures 6 to 10 The cross-section of the cross-axis force transmission plate 3 shown is a cross, and may also be a 'M' shape, or other shapes of radial segments with a central symmetry.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A connection structure between a steel pipe column and a reverse-construction steel column in a basement, characterized by: The upper steel pipe column (1) is coaxially inserted into the lower reverse-construction column (2) in the basement, and the steel pipe column (1) and the reverse-construction column (2) are provided with a coaxial cross-axis force transmission plate (3) at the mutual sleeve portion, and the mutual sleeve portion and the cross-axis force transmission plate (3) form a connecting section (5), and the four limbs of the cross-axis force transmission plate (3) pass through the outer wall of the reverse-construction column (2) and extend to the outer wall of the steel pipe column (1); the connection between the cross-axis force transmission plate (3), the reverse-construction column (2) and the steel pipe column (1) adopts equal strength or super strength welding connection; the basement section of the steel pipe column (1), the reverse-construction column (2) including the connecting section (5) form an integral steel column of the basement, and the reinforced concrete inside and outside the integral steel column of the basement are poured together to form a basement steel concrete column (7).

2. The connection structure between a steel pipe column and a reverse-construction steel column in a basement according to claim 1 is characterized by: The outer wall of the integral steel column of the basement is provided with a shear-resistant connector (4).

3. The connection structure between a steel pipe column and a reverse-construction steel column in a basement according to claim 2 is characterized by: The steel pipe column (1) is provided with a shear-resistant connector (4) on the inner wall of the basement portion, and the shear-resistant connector (4) is located above the connecting section (5).

4. The connection structure of a steel pipe column and a reverse-construction steel column in a basement according to claim 1, 2 or 3, characterized in that: An equal-strength or super-strength welded axial force transmission bottom plate (6) is provided at the bottom of the steel pipe column (1) and outside the wall of the reverse-construction column (2) as the bottom plate of the connecting section (5).

5. The connection structure between a steel pipe column and a reverse-construction steel column in a basement according to claim 1 is characterized by: The steel pipe column (1) is a round steel pipe or a rectangular steel pipe.

6. The connection structure between a steel pipe column and a reverse-construction steel column in a basement according to claim 1 is characterized by: The reverse construction column (2) is a round steel pipe or a rectangular steel pipe or a lattice column.

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