Column footing anchoring device for large steel structure

Abstract

The utility model discloses a column foot anchoring device of large -scale steel structure, including bottom plate, anchor rod, the bottom plate top is connected with the connecting cylinder for fixing steel column, and the one end of steel column inserts into the connecting cylinder and is connected through fixed component between steel column and connecting cylinder, and fixed component includes flange, bolt, and the flange and bolt all are equipped with two groups and two groups flange are fixed respectively on steel column and connecting cylinder, and are fixed through bolt screwing between two groups flange, and anchor rod is equipped with several groups and all is located on the bottom plate, and the fixed component of flange and bolt is used to connect steel column and connecting cylinder, and two groups flange are fixed respectively on steel column and connecting cylinder, and are fixed through two groups bolt screwing, and the more uniform and firm stress structure is formed, and steel column and connecting cylinder are positioned through the cooperation of positioning block and positioning sliding slot, and then are connected using two groups bolt, simplify the installation process of steel column, and only need to unscrew two groups bolt when disassembling, and it is convenient and fast, and the construction efficiency is improved significantly.

Description

Technical Field

[0001] This utility model belongs to the field of steel structure construction technology, and specifically relates to a column base anchoring device for large steel structures. Background Technology

[0002] In the field of modern construction engineering, large steel structures are widely used in high-rise buildings, long-span bridges, industrial plants and other projects due to their advantages such as high strength, light weight and short construction period. As an important component of steel structures, the reliability of the anchoring device of the column foot is directly related to the stability and safety of the entire steel structure system. The usual practice for steel column foot joints is to first pour concrete column piers, pre-embed anchor bolts in the column piers, and then install the upper steel column structure after the concrete reaches the design strength.

[0003] Existing common anchorage methods for large steel structure columns mostly employ traditional welding or simple bolt connections. While welding can achieve strong connection strength, it suffers from unstable welding quality, stress concentration during construction, and difficulties in later maintenance and repair. Simple bolt connections, under long-term exposure to complex loads (such as wind, seismic forces, and temperature stress), are prone to loosening, leading to failure of the connection between the steel column and the base plate, thus affecting the load-bearing capacity of the entire steel structure and potentially causing safety accidents. Furthermore, using multiple bolts arranged in a ring and bolted to the column base anchors makes the installation and dismantling of the steel column cumbersome and inefficient, failing to meet the demands of efficient and convenient construction in modern building engineering. Utility Model Content

[0004] The purpose of this utility model is to provide a column base anchoring device for large steel structures to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a column base anchoring device for large steel structures, comprising:

[0006] The base plate has a connecting cylinder for fixing the steel column connected to its top. One end of the steel column is inserted into the connecting cylinder and the steel column and the connecting cylinder are connected by a fixing component. The fixing component includes a flange and bolts. There are two sets of flanges and bolts, and the two sets of flanges are respectively fixedly fitted on the steel column and the connecting cylinder. The two sets of flanges are fixed together by bolts.

[0007] Anchor bolts, which are provided in several groups and are all located on the base plate, are used to connect with the concrete base layer.

[0008] Preferably, both sides of the flange are connected to fixing lugs, and the fixing lugs are provided with fixing holes. One end of the bolt passes through the fixing lugs on both flanges and is then screwed and fixed with a nut.

[0009] Preferably, the connecting cylinder is provided with positioning grooves on both sides, and the bottom of the steel column is connected to positioning blocks on both sides, and the positioning blocks are slidably inserted into the positioning grooves.

[0010] Preferably, one end of the anchor rod is connected to a threaded rod, and one end of the threaded rod rotates through the base plate and is screwed and fixed to a fastening nut.

[0011] Preferably, washers are provided at the bolt and nut joints and at the threaded rod and fastening nut joints. The washers can prevent direct metal-to-metal friction from causing scratches or indentations on the flange and fixing lug surfaces when tightening the bolts and nuts, prevent the components from losing strength or affecting their appearance due to surface damage, and extend the service life of the equipment. At the same time, for connecting components made of softer materials, the washers can effectively distribute pressure and prevent local dents and deformation.

[0012] Preferably, one end of the anchor rod is connected to a pull-out anchor plate. The pull-out anchor plate increases the contact area between the anchor rod and the soil. When the anchor rod is subjected to tensile force, the anchor plate can more effectively distribute the tensile force to the surrounding concrete base layer. The shear strength of the concrete base layer is used to resist the anchor rod being pulled out, which significantly improves the pull-out bearing capacity of the anchor rod and ensures the safety of the anchoring system when subjected to large loads.

[0013] Preferably, the anchor rod is connected to several pull-out anchors. Multiple pull-out anchors can effectively distribute the load acting on the anchor rod, avoiding excessive stress on a single part. When the anchor rod is subjected to tension or other external forces, each anchor works together to share the load, fully utilize the bearing potential of the concrete base layer around the anchor rod, greatly improve the overall pull-out resistance and bearing capacity of the anchor rod, and ensure the safety of the structure under complex load conditions.

[0014] Preferably, a number of longitudinal reinforcing ribs are connected between the base plate and the connecting cylinder.

[0015] Preferably, a transverse reinforcing rib connects two adjacent sets of longitudinal reinforcing ribs.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] (1) This utility model uses a flange and bolt fixing assembly to connect the steel column and the connecting cylinder. Two sets of flanges are fixedly fitted on the steel column and the connecting cylinder respectively. The two sets of bolts are screwed together to form a more uniform and firm stress structure. The steel column and the connecting cylinder are positioned by the cooperation of the positioning block and the positioning slide groove, and then connected by two sets of bolts. The installation process does not require complicated welding operations, which simplifies the installation process of the steel column. When disassembling, only two sets of bolts need to be unscrewed, which is convenient and quick and significantly improves the construction efficiency.

[0018] (2) The top of the anchor rod is connected to a threaded rod and fixed to the base plate by a fastening nut. One end of the anchor rod is connected to an anti-pull-out anchor plate and multiple sets of anti-pull-out anchor bolts. In practical applications, the anti-pull-out anchor plate increases the contact area between the anchor rod and the concrete base, and the anti-pull-out anchor bolts further enhance the anchoring effect, so that the anchor rod is tightly connected to the concrete base, effectively improving the anti-pull-out capacity of the column foot anchoring device and ensuring that the column foot remains stable when the large steel structure is subjected to upward tension.

[0019] (3) A longitudinal reinforcing bar is set between the base plate and the connecting cylinder, and a transverse reinforcing bar is connected between adjacent longitudinal reinforcing bars. This crisscrossing reinforcing bar structure is like building a solid skeleton for the device, which greatly enhances the structural strength and stability of the connection between the base plate and the connecting cylinder, improves the load-bearing capacity of the entire column foot anchoring device, and enables it to better bear the load transmitted by the large steel structure. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the steel column inserted into the connecting cylinder of this utility model;

[0022] Figure 3 This is a top view of the connecting cylinder of this utility model;

[0023] Figure 4 This is a schematic diagram of the flange of this utility model.

[0024] In the diagram: 1. Base plate; 2. Steel column; 3. Connecting cylinder; 4. Flange; 5. Bolt; 6. Anchor rod; 7. Fixing lug; 8. Fixing hole; 9. Positioning groove; 10. Positioning block; 11. Threaded rod; 12. Fastening nut; 13. Washer; 14. Pull-out anchor plate; 15. Pull-out anchor bolt; 16. Longitudinal reinforcing rib; 17. Transverse reinforcing rib; 18. Concrete base layer. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved with", "connected", etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0027] This utility model provides, for example Figure 1-4 The column base anchoring device shown includes:

[0028] The base plate 1 has a connecting cylinder 3 for fixing the steel column 2 connected to its top. One end of the steel column 2 is inserted into the connecting cylinder 3 and the steel column 2 and the connecting cylinder 3 are connected by a fixing component. The fixing component includes a flange 4 and bolts 5. There are two sets of flanges 4 and bolts 5. The two sets of flanges 4 are respectively fixedly fitted on the steel column 2 and the connecting cylinder 3. The two sets of flanges 4 are fixed together by bolts 5.

[0029] Anchor bolts 6, which are provided in several groups and are all located on the base plate 1, are used to connect with the concrete base layer 18.

[0030] Both sides of the flange 4 are connected to fixing lugs 7, and the fixing lugs 7 are provided with fixing holes 8. One end of the bolt 5 passes through the fixing lugs 7 on both flanges 4 and is screwed to the nut for fixation. The fixing lugs 7 on both sides, together with the bolt 5 and the nut, form a symmetrical fastening structure, which can evenly distribute the pressure to the entire flange 4, avoid stress concentration caused by single-point force, significantly improve the tensile and shear resistance of the connection part, and maintain a reliable connection under vibration and impact conditions to prevent loosening and falling off.

[0031] The connecting cylinder 3 has positioning grooves 9 on both sides, and the bottom of the steel column 2 is connected to positioning blocks 10 on both sides. The positioning blocks 10 are slidably inserted into the positioning grooves 9. The cooperation between the positioning blocks 10 and the positioning grooves 9 can guide the steel column 2 to be inserted vertically into the connecting cylinder 3, avoiding installation difficulties caused by manual alignment deviation.

[0032] One end of the anchor rod 6 is connected to a threaded rod 11. One end of the threaded rod 11 rotates through the base plate 1 and is screwed and fixed to the fastening nut 12. After the threaded rod 11 passes through the base plate 1, the top of the anchor rod 6 can be tightly fixed to the base plate 1 by tightening the fastening nut 12, forming a rigid connection. The cooperation between the threaded rod 11 and the fastening nut 12 can limit the axial movement of the anchor rod 6 and ensure its stability under force. When the threaded rod 11 and the fastening nut 12 are screwed together, accessories such as spring washers and anti-loosening nuts can also be used to prevent the fastening nut 12 from loosening under vibration and impact loads, ensuring the long-term reliability of the connection.

[0033] Washers 13 are provided at the threaded joints of the bolt 5 and the nut, as well as at the threaded joints of the threaded rod 11 and the fastening nut 12. The washers 13 can effectively increase the contact area of ​​the threaded joints, distribute the pressure, and prevent the threaded joints from being damaged due to excessive local pressure.

[0034] One end of the anchor rod 6 is connected to an anti-pull-out anchor plate 14, and several anti-pull-out anchor bolts 15 are connected to the anchor rod 6. The anti-pull-out anchor plate 14 and the anti-pull-out anchor bolts 15 are tightly engaged with the concrete base layer 18. By utilizing the adhesion and friction between the anchor rod and the concrete, the upward pulling force is resisted, ensuring that the entire column foot anchoring device is firmly fixed on the concrete base layer 18.

[0035] The base plate 1 and the connecting cylinder 3 are connected by several longitudinal reinforcing ribs 16. The longitudinal reinforcing ribs 16 mainly resist the bending moment and shear force generated by the vertical load, and avoid local deformation or damage due to stress concentration.

[0036] A transverse stiffener 17 connects two adjacent sets of longitudinal stiffeners 16. The transverse stiffener 17 resists the bending moment and torque generated by the horizontal load. Through this crisscrossing stiffener structure, the load can be effectively distributed and transferred, enhancing the stability of the structure.

[0037] Before the construction of the concrete base 18, the installation position of the anchor rod 6 is marked according to the design requirements. After the anchor rod 6 is placed in the predetermined position, the pull-out anchor plate 14 and pull-out anchor bolt 15 at one end of the anchor rod 6 are inserted into the concrete base 18 and left to solidify. The pull-out anchor plate 14 increases the contact area with the concrete, while the pull-out anchor bolt 15 further enhances the anchoring effect. Then, by rotating the fastening nut 12, the threaded rod 11 at the top of the anchor rod 6 is tightened and fixed on the base plate 1. At this time, the anchor rod 6, the fastening nut 12, the threaded rod 11 and the base plate 1 constitute a stable anchoring system, which firmly anchors the anchor rod 6 in the concrete base 18, providing stable foundation support for the entire column base anchoring device.

[0038] Then, using lifting equipment, the positioning blocks 10 on both sides of the bottom of the steel column 2 are aligned with the positioning grooves 9 on both sides inside the connecting cylinder 3 to ensure that the relative positions of the steel column 2 and the connecting cylinder 3 are accurate. Then, the steel column 2 is slowly inserted into the connecting cylinder 3. At this time, the fixing ears 7 on the flange 4 on the surface of the steel column 2 and the connecting cylinder 3 are aligned, and the fixing holes 8 in the fixing ears 7 also coincide. Then, the bolts 5 are passed through the fixing ears 7 on the two sets of flanges 4 and screwed into the nuts for fixation. In this process, the axial tension of the bolts 5 is used to make the flanges 4 fit tightly, generating friction to resist external forces. When tightening the nuts, as the torque increases, the bolts 5 are stretched, applying a preload to the flanges 4. This preload increases the friction between the flanges 4, thereby tightly connecting the steel column 2 and the connecting cylinder 3 together, completing the installation and fixation of the steel column 2, forming a stable connection structure, and ensuring that the steel column 2 will not easily loosen in subsequent use.

[0039] When it is necessary to disassemble, maintain or replace the steel column 2, use a wrench or other tools to unscrew the bolts 5 and nuts. After the bolts 5 are removed, the steel column 2 and the connecting cylinder 3 lose their fastening force. At this time, it is only necessary to overcome the friction between the positioning block 10 and the positioning slide 9, and the steel column 2 can be taken out of the connecting cylinder 3 by the lifting equipment. The operation is simple and convenient, which facilitates the subsequent inspection, maintenance or replacement of the steel column 2 and other components, and greatly improves the efficiency of maintenance and repair.

[0040] The longitudinal stiffeners 16 between the base plate 1 and the connecting cylinder 3 mainly resist the bending moment and shear force generated by the vertical load, while the transverse stiffeners 17 resist the bending moment and torque generated by the horizontal load. Through this crisscrossing stiffener structure, the load can be effectively distributed and transferred, enhancing the stability of the structure. The anchor rod 6 transfers the load borne by the base plate 1 to the concrete base layer 18 during the entire stress process. When the steel structure is subjected to an upward tensile force, the threaded rod 11 and fastening nut 12 at the top of the anchor rod 6 bear the tensile force and transfer the force to the anchor rod 6. The pull-out anchor plate 14 and pull-out anchor bolt 15 are tightly engaged with the concrete base layer 18, using the adhesion and friction between them to resist the upward tensile force, ensuring that the entire column foot anchoring device is firmly fixed on the concrete base layer 18, so that the large steel structure can remain stable and operate safely and reliably under various working conditions.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A column base anchoring device for a large steel structure, characterized in that, include: The base plate (1) has a connecting cylinder (3) for fixing the steel column (2) connected to its top. One end of the steel column (2) is inserted into the connecting cylinder (3) and the steel column (2) and the connecting cylinder (3) are connected by a fixing component. The fixing component includes a flange (4) and bolts (5). There are two sets of flanges (4) and bolts (5), and the two sets of flanges (4) are respectively fixedly fitted on the steel column (2) and the connecting cylinder (3). The two sets of flanges (4) are screwed together by bolts (5). Anchor rods (6) are provided in several groups and are all located on the base plate (1) for connection with the concrete base layer (18).

2. The column base anchoring device for a large steel structure according to claim 1, characterized in that: The flange (4) is connected to two fixing ears (7) on both sides. The fixing ears (7) are provided with fixing holes (8). One end of the bolt (5) passes through the fixing ears (7) on the two flanges (4) and is screwed to the nut for fixation.

3. The column base anchoring device for a large steel structure according to claim 1, characterized in that: The connecting cylinder (3) has positioning grooves (9) on both sides, and the bottom sides of the steel column (2) are connected to positioning blocks (10), which slide into the positioning grooves (9).

4. The column base anchoring device for a large steel structure according to claim 1, characterized in that: One end of the anchor rod (6) is connected to a threaded rod (11), and one end of the threaded rod (11) rotates through the base plate (1) and is screwed and fixed to the fastening nut (12).

5. The column base anchoring device for a large steel structure according to claim 4, characterized in that: Washers (13) are provided at the threaded joints of the bolt (5) and nut, and at the threaded joints of the threaded rod (11) and fastening nut (12).

6. The column base anchoring device for a large steel structure according to claim 1, characterized in that: One end of the anchor rod (6) is connected to an anti-pull-out anchor plate (14).

7. The column base anchoring device for a large steel structure according to claim 1, characterized in that: The anchor rod (6) is connected to several pull-out anchor bolts (15).

8. The column base anchoring device for a large steel structure according to claim 1, characterized in that: Several longitudinal reinforcing ribs (16) are connected between the base plate (1) and the connecting cylinder (3).

9. A column base anchoring device for a large steel structure according to claim 8, characterized in that: A transverse reinforcing rib (17) connects two adjacent sets of longitudinal reinforcing ribs (16).

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