Vertical box steel column ground tie assembly

Abstract

The utility model relates to steel structure connection technical field especially is vertical box type steel column connects ground subassembly, including two vertical and fixed setting box type steel column, the top of box type steel column is used for supporting external beam body, the bottom of each two box type steel column is embedded and fixed below ground, and the lower part outer side wall of each box type steel column below ground is respectively sleeved and is installed with outer constraint pipe unit, and the outer constraint pipe unit between two is connected through the cross -link piece, and the inner chamber of each box type steel column is filled with concrete inner column and is all casted. The utility model discloses outer constraint pipe unit is connected firmly through extension plate seat and ground pouring layer, and the cross -link piece connects two box type steel columns into a whole, forms the common force structure of steel column, outer constraint pipe, ground, effectively resists horizontal lateral tilting force, compares traditional independent steel column structure, and the lateral tilting ability is effectively improved, and the stability under the wind load or earthquake load of ensuring structure is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of steel structure connection technology, and in particular to vertical box-type steel column ground connection components. Background Technology

[0002] Vertical box-type steel columns have good compressive and bending resistance and are widely used in modern buildings, bridges, large equipment supports and other engineering structures.

[0003] Traditional methods of connecting vertical box-type steel columns to the ground often employ simple point-to-point connections such as anchor bolts or pre-embedded welding. For example, in patent document CN202020702414.X, the main structure includes a steel column and a concrete layer directly below the steel column. A web is fixedly installed on the lower outer surface of the steel column, and the steel column and web are surrounded by a fireproof layer. A flange is fixedly installed on the lower outer surface of the web, and column base bolts are encased within the concrete layer. A fixing nut is rotatably installed on the outer surface of the column base bolts near the upper end.

[0004] However, this structure has obvious shortcomings. The main box-shaped steel column adopts a traditional single-layer structure, relying only on the lower column base bolts and flange plates to connect and fix the bottom of the box-shaped steel column to the concrete. The overall stability is poor, making it difficult to withstand large wind loads. In addition, the stability and load-bearing strength are insufficient in terms of vertical load bearing.

[0005] Therefore, it is necessary to design a new type of structurally stable vertical box-type steel column ground connection component. Utility Model Content

[0006] To solve one of the aforementioned technical problems, the present invention employs the following technical solution: a vertical box-type steel column ground-connecting assembly, comprising two vertically and fixedly installed box-type steel columns. The top of the box-type steel columns is used to support an external beam. The bottoms of the two box-type steel columns are pre-embedded and fixed below the ground. External constraint tube units are respectively sleeved and installed on the lower outer side wall of each box-type steel column below the ground. The two external constraint tube units are connected by a horizontal connector. Concrete inner columns are poured and filled into the inner cavity of each box-type steel column, and the lower ends of each concrete inner column are poured and fixed to the corresponding outer side of the horizontal connector.

[0007] Based on any of the above technical solutions, a further optimization is made as follows: the external constraint tube unit includes a square tube sleeve fixedly welded to the outer wall of the box-shaped steel column, and an extension plate seat is welded to the outer wall around the square tube sleeve, with the outer end of each extension plate seat extending into the foundation pouring layer below the ground.

[0008] Based on any of the above technical solutions, a further optimization is made as follows: the horizontal connecting member includes several horizontally arranged horizontal connecting steel bars, the two ends of each horizontal connecting steel bar respectively extend through the square tube sleeve at its corresponding end and the box-shaped steel column and extend into the foundation pouring layer for fixed installation, and each horizontal connecting steel bar located inside the inner cavity of the box-shaped steel column is covered and fixed by the concrete inner column.

[0009] Based on any of the above technical solutions, a further optimization is made as follows: several longitudinal connecting bars are respectively arranged at intervals in the inner cavity of the box-shaped steel column between two adjacent transverse connecting bars, and both ends of each longitudinal connecting bar pass through the square tube sleeve and the box-shaped steel column and extend into the foundation pouring layer for fixed installation.

[0010] Based on any of the above technical solutions, a further optimization is made: all the longitudinal reinforcing bars located inside the inner cavity of the box-shaped steel column are covered and fixed by the concrete inner column.

[0011] Based on any of the above technical solutions, a further optimization is made: each of the longitudinal connecting bars is arranged perpendicularly and staggered with each of the transverse connecting bars.

[0012] Based on any of the above technical solutions, a further optimization is made by fixing and welding N reinforcing ribs to the outer side walls of each of the extended plate seats and the square tube sleeve respectively.

[0013] Based on any of the above technical solutions, a further optimization is made where N is an integer ≥ 3.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. The external constraint tube unit of this utility model is firmly connected to the foundation pouring layer through the extension plate seat. The horizontal connector connects the two box-shaped steel columns into a whole, forming a common force-bearing structure of steel columns, external constraint tube and foundation, which effectively resists horizontal tilting force. Compared with the traditional independent steel column structure, the anti-tilting ability is effectively improved, ensuring the stability of the structure under wind load or seismic load.

[0016] 2. The inner cavity of the box-type steel column is filled with concrete inner columns and encased with longitudinal and transverse reinforcing bars to form a composite structure. The concrete inner columns enhance the supporting force by utilizing compressive strength, the steel mesh enhances tensile and crack resistance, and the steel columns provide bending stiffness. The three work together to improve the load-bearing capacity of the component. At the same time, the concrete encasing the reinforcing bars can prevent corrosion and extend the service life of the structure.

[0017] 3. Horizontal reinforcing bars penetrate the square tube sleeve and box-shaped steel column and extend into the foundation. Longitudinal reinforcing bars intersect vertically to form a grid skeleton, ensuring that the load is evenly transferred through the upper beam, box-shaped steel column, reinforcing mesh, concrete inner column, outer restraint tube unit, and foundation, avoiding localized stress concentration. The reinforcing slab reinforcement at the connection between the extension plate seat and the square tube sleeve further disperses the nodal stress, ensuring the reliability of the load transfer chain.

[0018] 4. The longitudinal and transverse reinforcing bars are arranged perpendicularly and alternately to form a spatial orthogonal grid, which creates a confinement effect on the concrete inner columns, improving their compressive strength and deformation capacity. This grid, together with the external constraint tube unit and transverse connectors, transforms the two box-shaped steel columns from independent stress to overall coordinated stress, significantly enhancing the overall structural integrity, making it particularly suitable for large-span or high-load building scenarios. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, the elements or components are not necessarily drawn to scale.

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

[0021] Figure 2 This is a cross-sectional view of the box-shaped steel column of this utility model and a schematic diagram of its connection structure.

[0022] Figure 3 This is a three-dimensional structural schematic diagram of the external constraint tube unit of this utility model.

[0023] Figure 4 for Figure 3 A top-view structural diagram.

[0024] In the diagram, 1 is a box-shaped steel column; 2 is a concrete inner column; 3 is a square tube sleeve; 4 is an extension plate base; 5 is a horizontal connecting bar; 6 is a longitudinal connecting bar; 7 is a reinforcing plate bar; 8 is the ground surface; and 9 is the foundation pouring layer. Detailed Implementation

[0025] The embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of the present utility model, and are therefore merely examples and should not be construed as limiting the scope of protection of the present utility model. The specific structure of the present utility model is as follows: Figures 1-4 As shown in the image.

[0026] Example 1: A vertical box-type steel column ground-connected assembly includes two vertically and fixedly installed box-type steel columns 1. The top of the box-type steel column 1 is used to support the external beam. The bottom of each of the two box-type steel columns 1 is pre-embedded and fixed below the ground 8. An external constraint tube unit is respectively sleeved and installed on the lower outer wall of each box-type steel column 1 below the ground. The two external constraint tube units are connected by a horizontal connector. A concrete inner column 2 is poured and filled into the inner cavity of each box-type steel column 1. The lower end of each concrete inner column 2 is poured and fixed to the corresponding outer side of the horizontal connector.

[0027] In this invention, the external constraint tube unit is sleeved on the lower outer wall of the box-shaped steel column 1. Two external constraint tube units are connected by horizontal connectors to form an integral fixed structure. A concrete inner column 2 is poured into the inner cavity of the box-shaped steel column 1, and its lower end is fixed to the outer side of the horizontal connector. The compressive strength of the concrete and the bending strength of the box-shaped steel column 1 are combined to bear the load. The external constraint tube unit is securely connected to the foundation layer, making the connection between the box-shaped steel column 1 and the ground more reliable. Through the combined design of the external constraint tube unit and the horizontal connector, the traditional single-point fixing of an independent steel column is transformed into multi-point joint fixing.

[0028] The vertical box-type steel column ground connection assembly of this utility model can stably connect two adjacent vertical box-type steel columns 1 to the ground, effectively relying on the external constraint tube unit to firmly fix them to the foundation pouring layer below the ground; at the same time, under the action of the horizontal connector, the two box-type steel columns 1 can be connected into a whole, effectively ensuring the stability of the entire structure and improving its anti-tilting ability and ground connection firmness.

[0029] In addition, the interior of each box-shaped steel column 1 relies on cast-in-place concrete inner columns 2 to ensure the overall support effect and strength. At the same time, the concrete inner columns 2 can fix the two ends of the cross connector, thereby strengthening the reliability of the connection strength between the two box-shaped steel columns 1.

[0030] Based on any of the above technical solutions, the following further optimization is made: the external constraint tube unit includes a square tube sleeve 3 fixedly welded to the outer wall of the box-shaped steel column 1, and an extension plate seat 4 is welded to the outer wall around the square tube sleeve 3, with the outer ends of each extension plate seat 4 extending into the foundation pouring layer 9 below the ground 8.

[0031] The square tube sleeve 3 is welded to the outer wall of the box-shaped steel column 1, and the extended plate base 4 around it is welded to the square tube sleeve 3, with its outer end extending into the foundation pouring layer. When the foundation is poured, the extended plate base 4 is combined with the concrete, and the square tube sleeve 3 and the box-shaped steel column 1 are fixed in the foundation through a rigid welded connection.

[0032] Based on any of the above technical solutions, a further optimization is made as follows: the horizontal connecting member includes a number of horizontally arranged horizontal connecting steel bars 5, the two ends of each horizontal connecting steel bar 5 respectively extend through the square tube sleeve 3 at its corresponding end and the box-shaped steel column 1 and extend into the foundation pouring layer for fixed installation, and each of the horizontal connecting steel bars 5 located inside the inner cavity of the box-shaped steel column 1 is covered and fixed by the concrete inner column 2.

[0033] The horizontal reinforcing bars 5 are installed horizontally, with both ends passing through the square tube sleeves 3 and the box-shaped steel column 1, and extending into the foundation pouring layer for fixation. After the inner cavity of the box-shaped steel column 1 is filled with concrete, the horizontal reinforcing bars 5 are covered by concrete, forming a reinforced concrete composite structure, which shares the load through the tensile strength of the reinforcing bars and the compressive strength of the concrete.

[0034] Specifically, the horizontal connecting steel bar 5 penetrates the square tube sleeve 3 and the box-shaped steel column 1 to enhance the connection strength between the two steel columns; the horizontal connecting steel bar 5 is covered with concrete to make the horizontal connecting member and the steel column form an integral whole, thereby improving the structure's ability to bear the load together.

[0035] Based on any of the above technical solutions, a further optimization is made as follows: several longitudinal connecting bars 6 are respectively arranged at intervals in the inner cavity of the box-shaped steel column 1 between two adjacent transverse connecting bars 5, and both ends of each longitudinal connecting bar 6 pass through the square tube sleeve 3 and the box-shaped steel column 1 and extend into the foundation pouring layer for fixed installation.

[0036] The longitudinal connecting bars 6 are spaced apart between the adjacent transverse connecting bars 5 inside the box-shaped steel column 1, with both ends passing through the square tube sleeves 3 and the box-shaped steel column 1, extending into the foundation pouring layer for fixation. The longitudinal connecting bars 6 and the transverse connecting bars 5 form a steel reinforcement skeleton, which forms a grid structure after the concrete is poured, enhancing the integrity of the inner cavity of the box-shaped steel column 1.

[0037] Example 2: Compared with Example 1, this example also includes the following technical features:

[0038] Based on any of the above technical solutions, a further optimization is made: each of the longitudinal reinforcing bars 6 located inside the inner cavity of the box-shaped steel column 1 is covered and fixed by the concrete inner column 2.

[0039] When the inner concrete column 2 is poured into the inner cavity of the box-shaped steel column 1, the longitudinal connecting steel bar 6 passes through the square tube sleeve 3 and extends into the foundation pouring layer, and its part located in the inner cavity of the steel column is completely wrapped by concrete. After the concrete hardens, it forms a rigid connection with the longitudinal connecting steel bar 6 through the bond force, so that the longitudinal connecting steel bar 6, the inner concrete column 2 and the box-shaped steel column 1 share the load: the longitudinal connecting steel bar 6 bears the axial tensile force and part of the bending moment, the inner concrete column 2 uses its compressive strength to transfer the load, and the box-shaped steel column 1 provides bending and shear support. The three form a combined load-bearing structure through the covering structure.

[0040] Based on any of the above technical solutions, a further optimization is made: each of the longitudinal connecting bars 6 is arranged perpendicularly and staggered with each of the transverse connecting bars 5.

[0041] The longitudinal reinforcing bars 6 and the transverse reinforcing bars 5 are arranged in an orthogonal grid pattern inside the box-shaped steel column 1. The longitudinal reinforcing bars 6 extend along the axial direction of the steel column, and the transverse reinforcing bars 5 are arranged horizontally. The two are perpendicularly staggered at their intersection points. When the concrete inner column 2 is poured, the reinforcing bar grid is covered by concrete, forming a combined structure of reinforced concrete skeleton and box-shaped steel column 1.

[0042] Based on any of the above technical solutions, a further optimization is made: N reinforcing ribs 7 are fixedly welded to the outer side walls of each of the extended plate seats 4 and the square tube sleeve 3 respectively.

[0043] Based on any of the above technical solutions, a further optimization is made where N is an integer ≥ 3.

[0044] The reinforcing ribs 7 are fixed to the connection between the extension plate base 4 and the outer wall of the square tube sleeve 3 by welding, forming a rigid support structure. When the box-shaped steel column 1 is under load, stress concentration will occur at the welded joint between the extension plate base 4 and the square tube sleeve 3. The reinforcing ribs 7 will diffuse the concentrated stress at the joint to the periphery, avoiding excessive load on a single weld. In addition, N reinforcing ribs 7 (N≥3) form a grid-like or radial support, which improves the local stiffness of the joint and reduces deformation.

[0045] Construction process of vertical box-type steel column ground connection assembly:

[0046] 1. Construction preparation stage: Foundation positioning and excavation. According to the design drawings, locate the installation position of the box-type steel column 1, excavate the foundation pit to the design depth, and ensure that the bearing capacity of the foundation pouring layer meets the requirements.

[0047] Prefabricate box-shaped steel columns 1 to ensure their verticality and dimensional accuracy; process square tube sleeves 3 (main body of the outer constraint tube unit) and extension plate seats 4, and weld N reinforcing ribs 7 (N≥3) on the outer side wall of the extension plate seats 4 and the square tube sleeves 3 to form the outer constraint tube unit.

[0048] Prepare transverse connecting bars 5 and longitudinal connecting bars 6, ensuring that the specifications of the bars meet the design requirements and that the surface is free of rust.

[0049] II. Installation of Box-Type Steel Column 1 and External Constraint Tube Unit:

[0050] The box-shaped steel columns 1 are pre-embedded and fixed. The two box-shaped steel columns 1 are vertically hoisted into the foundation pit. After adjusting the verticality, their bottoms are pre-embedded under the foundation and temporarily fixed to ensure accurate positioning.

[0051] Installation of external constraint tube unit: The external constraint tube unit (square tube sleeve 3 + extension plate seat 4 + reinforcing plate 7) is sleeved on the lower outer wall of the box-shaped steel column 1, and the square tube sleeve 3 is fixedly connected to the box-shaped steel column 1 by welding.

[0052] Adjust the position of the extension plate base 4 so that its outer end extends evenly to the designed position of the foundation pouring layer, ensuring the anchorage contact area between the extension plate base 4 and the foundation.

[0053] Arrangement of horizontal connectors and longitudinal reinforcing bars 6:

[0054] For the installation of the horizontal connecting steel bar 5, both ends of the horizontally set horizontal connecting steel bar 5 are passed through the corresponding end square tube sleeve 3 and box-shaped steel column 1, so that the steel bar extends to the predetermined anchorage position in the foundation pouring layer and temporarily fixes the steel bar.

[0055] Ensure that the portion of the transverse reinforcing bar 5 within the inner cavity of the box-shaped steel column 1 is at the designed height, in preparation for subsequent concrete pouring.

[0056] The longitudinal connecting steel bars 6 are installed in the inner cavity of the box-shaped steel column 1 between adjacent transverse connecting steel bars 5. The longitudinal connecting steel bars 6 are arranged at intervals, so that their two ends pass through the square tube sleeve 3 and the box-shaped steel column 1, and extend into the foundation pouring layer for fixation.

[0057] Adjust the longitudinal connecting steel bars 6 and the transverse connecting steel bars 5 to be set perpendicularly and staggered to form an orthogonal grid skeleton. At the intersection points, they can be fixed by binding or welding to ensure the stability of the grid structure.

[0058] IV. Foundation and Concrete Column 2 Pouring

[0059] For the construction of the foundation pouring layer, the reinforcing bars are tied (if required by the design), and then concrete is poured to completely cover the outer end of the extension plate base 4, the anchoring ends of the transverse reinforcing bars 5 and the longitudinal reinforcing bars 6. After compaction by vibration, it is cured to the design strength.

[0060] After the concrete inner column 2 of the box-shaped steel column 1 is poured, and the arrangement of the steel mesh (transverse steel bar 5 and longitudinal steel bar 6) in the inner cavity of the box-shaped steel column 1 is checked to be correct, concrete is poured from the top of the box-shaped steel column 1 into the inner cavity to ensure that the concrete is filled densely and completely covers the longitudinal steel bar 6 and the transverse steel bar 5.

[0061] Vibrate the concrete inner column 2 to remove air bubbles, and cure it to the design strength, so that the concrete inner column 2, the box-type steel column 1, and the outer restraint tube unit form an integral composite structure.

[0062] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model. For those skilled in the art, any alternative improvements or transformations made to the implementation of this utility model fall within the protection scope of this utility model.

[0063] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A vertical box-type steel column ground-connecting assembly, comprising two vertically and fixedly installed box-type steel columns, the top of which is used to support an external beam, characterized in that: The bottom of each of the two box-shaped steel columns is pre-embedded and fixed below the ground. An external constraint tube unit is respectively sleeved and installed on the lower outer wall of each of the box-shaped steel columns below the ground. The two external constraint tube units are connected by a horizontal connector. A concrete inner column is poured and filled into the inner cavity of each of the box-shaped steel columns. The lower end of each concrete inner column is poured and fixed to the corresponding outer side of the horizontal connector.

2. The vertical box-type steel column ground connection assembly according to claim 1, characterized in that: The external constraint tube unit includes a square tube sleeve fixedly welded to the outer wall of the box-shaped steel column. Extension plate seats are welded to the outer walls around the square tube sleeve, and the outer ends of each extension plate seat extend into the foundation pouring layer below the ground.

3. The vertical box-type steel column ground connection assembly according to claim 2, characterized in that: The horizontal connecting member includes several horizontally arranged horizontal connecting bars. The two ends of each horizontal connecting bar are respectively movably passed through the square tube sleeve and the box-shaped steel column at their corresponding ends and are fixedly installed inside the foundation pouring layer. Each horizontal connecting bar located inside the inner cavity of the box-shaped steel column is covered and fixed by the concrete inner column.

4. The vertical box-type steel column ground connection assembly according to claim 3, characterized in that: Several longitudinal reinforcing bars are provided at intervals in the inner cavity of the box-shaped steel column between two adjacent transverse reinforcing bars. Both ends of each longitudinal reinforcing bar pass through the square tube sleeve and the box-shaped steel column and extend into the foundation pouring layer for fixed installation.

5. The vertical box-type steel column ground connection assembly according to claim 4, characterized in that: Each of the longitudinal reinforcing bars located inside the inner cavity of the box-shaped steel column is encased and fixed by the concrete inner column.

6. The vertical box-type steel column ground connection assembly according to claim 5, characterized in that: Each of the longitudinal connecting bars is arranged perpendicularly and staggered with each of the transverse connecting bars.

7. The vertical box-type steel column ground connection assembly according to claim 6, characterized in that: N reinforcing ribs are fixedly welded to the outer side walls of each of the extended plate seats and the square tube sleeve respectively.

8. The vertical box-type steel column ground connection assembly according to claim 7, characterized in that: in, N is an integer ≥ 3.

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