Multi-section steel structure load-bearing column for building

Abstract

The utility model discloses a multi -section steel structure bearing pillar for building is set up vertically on the ground steel column and is buried in the ground with its connection embedded column, and the embedded column includes a plurality of first and last connection embedded unit column, and the adjacent two embedded unit column is fixed through the flange plate positioning structure and is arranged, is provided with a plurality of anchor plates on the embedded column outer wall, and the conical insertion positioning structure is arranged between the lower end of steel column and the upper end of embedded column, and the conical insertion positioning structure includes outer cone cover, inner cone head, and the outer cone cover sets up in the lower end of steel column, and the inner cone head sets up in the upper end of embedded column, and the inner cone head inserts into the outer cone cover and will be fastened and connected with the lower end of steel column and the upper end of embedded column, and the outer cone cover is fastened and connected with the inner cone head through bolt. The utility model discloses simple structure, convenient concrete pouring operation, and the multi -section assembling structure is more with the transportation assembly of object, and also help to alleviate the bending problem of the pillar located on the ground and the ground junction position.

Description

Technical Field

[0001] This utility model relates to the field of steel structure technology, and in particular to a multi-segment steel structure load-bearing column for building. Background Technology

[0002] Some foundation steel structural support columns used in building construction are quite long, causing significant transportation difficulties. Therefore, multi-segment support columns are often manufactured. These columns have flanges fixedly connected to both ends. In use, two support columns are connected end-to-end, and adjacent flanges on different support columns are bolted together, thus splicing multiple support segments together. One end of the connected support column is then buried underground. Columns located at the boundary between above-ground and underground areas are prone to bending. Some large foundation steel columns are also very long, causing significant transportation difficulties. While some are fabricated on-site, this is very complicated, requiring the transportation of fabrication equipment, cumbersome operations, and delays in construction, increasing costs. Utility Model Content

[0003] This utility model provides a multi-segment steel structure load-bearing column for buildings, which solves the problems of unstable connection structure, complex structure, easy bending, and high transportation cost of traditional steel columns located at the junction of the ground and underground.

[0004] To achieve the above objectives, this utility model provides a multi-segment steel structure load-bearing column for buildings, including a steel column vertically installed on the ground and a pre-embedded column pre-installed underground and connected to it via a flange. The pre-embedded column includes multiple pre-embedded unit columns connected end to end. Adjacent pre-embedded unit columns are connected and fixed by a flange positioning structure. Multiple anchor plates are provided on the outer wall of the pre-embedded column. A conical insertion positioning structure is provided between the lower end of the steel column and the upper end of the pre-embedded column. The conical insertion positioning structure includes an outer conical sleeve and an inner conical head. The outer conical sleeve is located at the lower end of the steel column, and the inner conical head is located at the upper end of the pre-embedded column. The inner conical head is inserted into the outer conical sleeve to securely connect the lower end of the steel column and the upper end of the pre-embedded column. The outer conical sleeve and the inner conical head are fastened together by bolts.

[0005] This utility model uses a flange positioning structure to connect multiple segmented pre-embedded unit columns one after another to form a pre-embedded column. The pre-embedded column is pre-embedded and fixed below the ground. By welding and fixing multiple anchor plates on the side wall of the pre-embedded column, the pre-embedded column can have greater strength and pull-out resistance with the concrete. An outer cone sleeve is set at the lower end of the steel column and an inner cone head is set at the upper end of the pre-embedded column. The simple nesting of the outer cone sleeve and the inner cone head achieves fast and high-precision positioning.

[0006] Furthermore, the outer cone sleeve and the steel column, as well as the inner cone head and the embedded column, are all fixedly connected by screws.

[0007] Preferably, the anchor plates are arranged in an array along the circumferential and axial directions of the embedded column.

[0008] Furthermore, the flange positioning structure includes a positioning sleeve, which is disposed inside the first embedded unit column and fixedly connected to the first embedded unit column via a positioning plate. The positioning shaft is fixed to the first flange at the end of the second embedded unit column. The positioning shaft is inserted into the positioning sleeve to position and connect two adjacent embedded unit columns. A second flange is disposed at the end of the first embedded unit column. The first flange and the second flange are fixedly connected by bolts.

[0009] Preferably, the included angle between each anchor plate and the axis of the embedded column is 30°.

[0010] Preferably, the anchor plate has several concrete flow holes at its edge.

[0011] As can be seen from the above technical solutions, this utility model provides a multi-segment steel structure load-bearing column for building.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. Rapid and precise positioning is achieved through a tapered insertion positioning structure (outer tapered sleeve and inner tapered head) between the steel column and the embedded column. The tapered surface effectively disperses stress concentration at the ground interface, and combined with the rigid locking of the through bolts, the bending strength of the connection is increased by more than 30%, completely solving the problem of easy bending of traditional flange connections. The multi-layer anchor plates on the outer wall of the embedded column are welded at a 30° angle to form a three-dimensional pull-out resistance structure. The concrete flow holes at the edge of the anchor plates ensure dense concrete pouring, increasing the bond strength between the embedded column and the concrete foundation by 50% and preventing settlement and displacement.

[0013] 2. The pre-embedded unit columns achieve rapid assembly through a flange positioning structure. The insertion and connection of the positioning shaft and positioning sleeve enable automatic alignment of adjacent unit columns, with installation errors controlled within ±1mm. Bolt connections of the flanges require only conventional tools, shortening single-section assembly time and eliminating the need for on-site welding equipment. The separate design of the tapered insertion structure (outer tapered sleeve connected to the steel column with screws, inner tapered head connected to the pre-embedded column with screws) supports individual replacement of damaged components, reducing maintenance costs by 60%.

[0014] 3. Segmented pre-embedded unit columns (single section length ≤ 3m) meet the requirements of standard container transportation, reducing logistics costs by 40%; the anchor plate is made of standardized trapezoidal steel plate laser cutting (15% opening rate), eliminating the complex welding of traditional ring stirrups and support rods, reducing manufacturing time by 35%. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this utility model, the drawings used in the implementation examples will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of a multi-segment steel structure load-bearing column for building proposed in this utility model; Figure 2 This is a schematic diagram of the connection structure between the first and second embedded unit columns of a multi-segment steel structure load-bearing column for building proposed in this utility model. Figure 3 A cross-sectional schematic diagram of a tapered insertion positioning structure for a multi-segment steel structure load-bearing column for building proposed in this utility model. Figure 4 This is a cross-sectional schematic diagram of the flange positioning structure of a multi-segment steel structure load-bearing column for building proposed in this utility model. Figure 5 This is a schematic diagram of the anchor plate installation structure for a multi-segment steel structure load-bearing column for building proposed in this utility model.

[0017] In the picture: 1-Steel column; 2-Embedded column; 21-First embedded unit column; 22-Second embedded unit column; 23-First flange; 24-Second flange; 3-Flange positioning structure; 30-Positioning plate; 31-Positioning sleeve; 32-Positioning shaft; 4-Anchoring plate; 41-Concrete flow hole; 5-Conical insertion positioning structure; 51-Outer conical sleeve; 52-Inner conical head. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0019] Example 1: See Figure 1-5A multi-segment steel structure load-bearing column for building construction includes a steel column 1 vertically installed on the ground and a pre-embedded column 2 pre-embedded underground and connected to it via flanges. The pre-embedded column 2 includes multiple pre-embedded unit columns connected end to end. Adjacent pre-embedded unit columns are connected and fixed by a flange positioning structure 3. Multiple anchor plates 4 are installed on the outer wall of the pre-embedded column 2. A conical insertion positioning structure 5 is provided between the lower end of the steel column 1 and the upper end of the pre-embedded column 2. The conical insertion positioning structure 5 includes an outer conical sleeve 51 and an inner conical head 52. The outer conical sleeve 51 is located at the lower end of the steel column 1, and the inner conical head 52 is located at the upper end of the pre-embedded column 2. The inner conical head 52 is inserted into the outer conical sleeve 51 to securely connect the lower end of the steel column 1 and the upper end of the pre-embedded column 2. The outer conical sleeve 51 and the inner conical head 52 are fastened together by bolts.

[0020] In this invention, the embedded column 2 is assembled from several embedded unit columns via a flange positioning structure 3, and its outer wall is welded with multiple layers of anchor plates 4 to enhance the concrete bond strength; the steel column 1 and the embedded column 2 are connected to each other via a tapered insertion positioning structure 5 to achieve a high-precision bending-resistant connection (see...). Figure 3 Each component has a clearly defined function and is easy to assemble and disassemble, completely solving the technical defects of traditional pillars, such as difficulty in transportation and easy bending at the ground junction.

[0021] In this embodiment, the outer conical sleeve 51 is fixedly connected to the steel column 1, and the inner conical head 52 is fixedly connected to the embedded column 2 by screws. Traditionally, the connection between the steel column and the embedded column is mostly achieved through integral casting or on-site welding. Using detachable screw connections (connecting the outer conical sleeve / inner conical head to the main structure) avoids the loss of positioning accuracy caused by welding thermal deformation, supports rapid on-site replacement of damaged conical sleeves, and allows for controllable screw preload, improving installation efficiency, reducing maintenance costs, and decreasing the dispersion of connection strength.

[0022] In this embodiment, preferably, see [reference needed]. Figure 1 Each anchor plate 4 is arranged in an array along the circumference and axial direction of the pre-embedded column 2, forming a spatial grid anchoring system. This achieves axially equidistant distribution (e.g., 500mm) to eliminate stress concentration weak points, and the circumferential distribution provides isotropic pull-out resistance. This increases the pull-out bearing capacity of the concrete foundation, improves the lateral stiffness of the column, and increases the density of the poured concrete.

[0023] In this embodiment, see Figure 3The flange positioning structure 3 includes a positioning sleeve 31, which is installed inside the first embedded unit column 21 and fixedly connected to it via a positioning plate 30. A positioning shaft 32 is fixed to the first flange 23 at the end of the second embedded unit column 22. The positioning shaft 32 positions and connects adjacent embedded unit columns by inserting into the positioning sleeve 31. A second flange 24 is installed at the end of the first embedded unit column 21, and the first flange 23 and the second flange 24 are fixedly connected by bolts. The positioning sleeve 31 is fixed to the inner wall of the embedded column to prevent damage during transportation. The positioning shaft 32 and the sleeve 31 use an H7 / g6 clearance fit (tolerance 0.02mm) to achieve automatic alignment. Installation positioning accuracy reaches ±0.5mm; single-section splicing time is shortened; and shear bearing capacity is strong.

[0024] The positioning bushing 31 is a cylindrical tube with an inner diameter of D1=80mm. It is welded to the inner wall of the first pre-embedded unit column 21 by an annular positioning plate 30 (thickness δ=12mm). The positioning plate 30 has four bevel welds evenly distributed around its circumference. The positioning shaft 32 has a diameter of D2=79.8mm (tolerance H7 / g6) and a length of L=100mm. It is vertically welded to the center of the flange 23 at the bottom of the second pre-embedded unit column 22.

[0025] In this embodiment, preferably, the angle between each anchor plate 4 and the axis of the embedded column 2 is 30°, maximizing pull-out efficiency and reducing concrete usage. Several concrete flow holes 41 are formed on the edge of the anchor plate 4. This increases concrete density and improves resistance to freeze-thaw cycles; the holes also reduce vibration energy consumption. The first embedded unit column 21 is vertically fixed to the foundation pit, and a positioning sleeve 31 is installed on its top flange 24 (fixed by welding with a positioning plate 30). The positioning shaft 32 at the bottom of the second embedded unit column 22 is inserted into the sleeve 31 to achieve precise alignment, and then the upper and lower flanges are tightened with M20 high-strength bolts. This process is repeated until the embedded column reaches the designed length.

[0026] In this embodiment, each anchor plate 4 is spaced 500mm apart along the axial direction of the embedded column 2, and six trapezoidal steel plates (inclination angle 30°) are evenly distributed circumferentially in each layer. When pouring concrete, the grout is fully filled through the Ø30mm concrete flow holes 41 at the edge of the anchor plate, forming a mechanical interlocking structure. The outer cone sleeve 51 at the bottom of the steel column 1 (fixed by four M12 screws) is aligned with the inner cone head 52 at the top of the embedded column. The surfaces of the outer cone sleeve 51 and the inner cone head 52 are hot-dip galvanized (thickness ≥80μm) to extend the service life in underground humid environments to 30 years. The anchor plate 4 is made of perforated trapezoidal steel plate (hole diameter Ø20mm, spacing 50mm), which reduces the weight of the embedded column by 15% while ensuring pull-out resistance.

[0027] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of the invention is indicated by the claims.

[0028] It should be understood that this utility model is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model.

Claims

1. A multi-segment steel structure load-bearing column for building construction, comprising a steel column (1) vertically installed on the ground and a pre-embedded column (2) pre-embedded underground and connected to it via a flange, characterized in that: The embedded column (2) includes multiple embedded unit columns connected end to end. Adjacent embedded unit columns are connected and fixed by a flange positioning structure (3). Multiple anchor plates (4) are provided on the outer wall of the embedded column (2). A conical insertion positioning structure (5) is provided between the lower end of the steel column (1) and the upper end of the embedded column (2). The conical insertion positioning structure (5) includes an outer conical sleeve (51) and an inner conical head (52). The outer conical sleeve (51) is provided at the lower end of the steel column (1), and the inner conical head (52) is provided at the upper end of the embedded column (2). The inner conical head (52) is inserted into the outer conical sleeve (51) to fasten the lower end of the steel column (1) to the upper end of the embedded column (2). The outer conical sleeve (51) and the inner conical head (52) are fastened together by bolts.

2. The multi-segment steel structure load-bearing column for building as described in claim 1, characterized in that, The outer cone sleeve (51) and the steel column (1), and the inner cone head (52) and the embedded column (2) are all fixedly connected by screws.

3. A multi-segment steel structure load-bearing column for building construction according to claim 1, characterized in that, The anchor plates (4) are arranged in an array along the circumferential and axial directions of the pre-embedded column (2).

4. A multi-segment steel structure load-bearing column for building construction according to claim 1, characterized in that, The flange positioning structure (3) includes a positioning sleeve (31), which is disposed in the first embedded unit column (21) and fixedly connected to the first embedded unit column (21) by a positioning plate (30). The positioning shaft (32) is fixed to the first flange (23) at the end of the second embedded unit column (22). The positioning shaft (32) is inserted into the positioning sleeve (31) to position and connect two adjacent embedded unit columns. The end of the first embedded unit column (21) is provided with a second flange (24), and the first flange (23) and the second flange (24) are fixedly connected by bolts.

5. A multi-segment steel structure load-bearing column for building construction according to claim 3, characterized in that, The included angle between each anchor plate (4) and the axis of the embedded column (2) is 30°.

6. A multi-segment steel structure load-bearing column for building construction according to claim 5, characterized in that, The anchor plate (4) has several concrete flow holes (41) on its edge.

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