CN220365047U - Buried steel pipe column foot structure - Google Patents

Abstract

The application relates to the field of civil construction and particularly discloses a buried steel pipe column foot structure, which comprises a connecting disc arranged at the bottom of a steel pipe, wherein a plug column is coaxially connected to the connecting disc, and the maximum outer diameter of the plug column is not smaller than the outer diameter of the steel pipe; the steel pipe is provided with a fixing component for fixedly connecting the inserted column to the connecting disc. The application has the effect that the contact area of the overlapped section of the inserted column and the column body or the foundation is increased, and both the anti-overturning and anti-folding capabilities are improved.

Description

An embedded steel tube column foot structure

Technical field

This application relates to civil construction-related fields, and in particular to an embedded steel pipe column foot structure.

Background technique

The function of column feet is to fix the column to the foundation and transmit the internal force of the column to the foundation. Steel structure column feet are classified according to the structural stress. They can be roughly divided into two categories: hinged column feet and rigidly connected column feet. Hinged column feet are only It transmits vertical and horizontal forces but does not transmit bending moments, such as bearing-type hinged column feet and flat-plate hinged column feet. However, for steel-jointed column feet, the connecting section between the column foot and the foundation needs to have sufficient resistance to overturning.

In the related technology, multiple steel bars are fixed at the bottom of the column feet, and the steel bars are inserted into the foundation/pile body to be connected, and then concrete is poured for fixation. (For example, in the Chinese patent with announcement number CN212200803U, the column feet include the bottom plate. , the bottom plate is connected to the concrete base on the ground through screws). Although the steel bars and the foundation/pile body have overlapping connection sections, due to the smaller diameter of the steel bars compared to the steel pipes, after being inserted into the foundation, the steel bars are relatively smaller than the steel pipes. The contact area with the foundation/pile body makes the overall resistance of the steel pipe to overturning and bending low.

Utility model content

In order to improve the problem of using steel bars to connect the column feet of steel pipe columns, which results in low anti-overturning and bending resistance of the column, this application provides an embedded steel pipe column foot structure.

The embedded steel pipe column foot structure provided by this application adopts the following technical solution:

An embedded steel pipe column foot structure, including a connecting plate arranged at the bottom of the steel pipe, an inserting column coaxially connected to the connecting plate, and the maximum outer diameter of the inserting column is not less than the outer diameter of the steel pipe;

The steel pipe is provided with a fixing component for fixedly connecting the plug to the connecting plate.

By adopting the above technical solution, when installing the rigid pipe, since the column feet can be inserted into the concrete or the pile body through the inserting columns, and the maximum outer diameter of the column foot inserting columns is not less than the outer diameter of the steel pipe, the inserting column and the column body or The contact area of the overlapping sections of the foundation increases, and the overturning and bending resistance are improved.

Optionally, the insertion column includes a circular ring and a circular cone formed integrally with the circular ring. The outer diameter of the circular cone gradually increases along the direction from the circular ring to the steel pipe;

The fixing component is disposed between the ring and the connecting plate.

By adopting the above technical solution, since the outer diameter of the truncated cone gradually increases, the truncated cone can be adapted to foundations or pile bodies with more holes, and even piles with different inner diameters can be adapted to the truncated cone.

Optionally, the fixing component includes a bolt and a nut. After the bolt passes through the ring and the connecting disk, it is threadedly connected to the nut.

By adopting the above technical solution, when installing insert columns and steel columns externally, only the bolts need to be passed through the ring and the connecting plate, and the connecting plate can be conveniently connected to the steel pipe. The connection between the bolts and nuts is convenient and stable, and has high resistance. Shear force.

Optionally, a plurality of ventilation holes are provided on the connecting plate, and the positions of the plurality of ventilation holes correspond to the hollow inner cavity of the steel pipe.

By adopting the above technical solution, when the steel pipe is inserted into the pile body or other foundation, concrete is poured from the middle of the steel pipe. Since the ventilation holes balance the air pressure inside the steel pipe, the concrete falls more smoothly, and the concrete flows into the inserted column. -The integrated cylindrical concrete structure formed in the steel tube strengthens the integrity of the steel column and column base.

Optionally, a plurality of stiffening rib plates are fixedly connected to the outer periphery of the steel pipe. One side of the stiffening rib plate is fixed to the outer wall of the steel pipe, and the other side of the stiffening rib plate is connected to the connection plate away from the insertion column. The side walls are fixedly connected; a plurality of the stiffening ribs are evenly arranged along the outer peripheral wall of the steel pipe.

By adopting the above technical solution, the stiffening rib plate improves the stability between the connecting plate and the outer wall of the steel pipe, so that the pressure and shear performance of the connecting plate is improved.

Optionally, a plurality of studs are connected to the outer wall of the steel pipe, and the horizontal/vertical spacing of the plurality of studs is set to 200 mm.

By adopting the above technical solution, the bolts protrude from the steel pipe. After concrete is poured outside the steel pipe, the bolts can be anchored into the concrete layer to strengthen the connection. The horizontal/vertical spacing of the bolts is set to 200mm so that they will not be too dense and ensure Its anchoring effect saves materials at the same time.

Optionally, the tangent value of the slope angle of the outer peripheral side wall of the truncated cone ranges from (4-6):1.

By adopting the above technical solution, the outer peripheral wall of the truncated cone is inclined, and the tangent value of the slope angle of the outer peripheral side wall of the truncated cone is in the range of (4-6):1, forming a triangular-like stable structure that can have a higher strength compression effect.

Optionally, the outer peripheral wall of the truncated cone is provided with a friction structure for increasing the friction of the outer wall.

By adopting the above technical solution, the friction structure increases the friction of the outer wall of the truncated cone. When the insertion column is inserted into the hole of the pile body or foundation, the outer wall of the truncated cone offsets the inner wall of the hole or the inner wall of the pile body, thereby reducing the probability of relative sliding of the truncated cone. .

Optionally, a water-stop plate is fixedly connected to the outer peripheral wall of the steel pipe, the water-stop plate is arranged concentrically with the steel pipe, and a rubber ring is set above the steel pipe and the water-stop plate.

By adopting the above technical solution, the water-stop plate and rubber ring further increase the water-blocking effect of the steel pipe. When water penetrates along the gap between the old and new concrete joints, it can no longer penetrate when it encounters the water-stop plate, and the water is stopped. The plate and rubber ring play the role of blocking the water penetration path and preventing leakage.

To sum up, this application includes at least one of the following beneficial technical effects:

1. When installing rigid pipes, since the column feet can be inserted into concrete or piles through the inserted columns, and the maximum outer diameter of the inserted columns at the column feet is not less than the outer diameter of the steel pipe, the overlapping section of the inserted columns and the column or foundation The contact area increases, and the resistance to overturning and bending is improved;

2. The breathable holes balance the air pressure inside the steel pipe, making the concrete fall more smoothly. The concrete flows into the inserted column, forming an integrated cylindrical concrete structure between the inserted column and the steel pipe, which strengthens the integrity of the steel column and column foot. ;

3. The friction structure increases the friction of the outer wall of the truncated cone. When the insertion column is inserted into the hole of the pile body or foundation, the outer wall of the truncated cone offsets the inner wall of the hole or the inner wall of the pile body, thereby reducing the probability of relative sliding of the truncated cone.

Description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application;

Figure 2 is a schematic structural diagram of the connection between the connecting plate of the steel pipe and the insertion column.

Reference signs: 1. Steel pipe; 11. Connecting plate; 111. Ventilation hole; 12. Bolt; 13. Water stop plate; 131. Rubber ring; 14. Stiffening rib plate; 2. Insert column; 21. Ring; 22. Round table; 3. Fixed components; 31. Bolts; 32. Nuts.

Detailed ways

The present application will be further described in detail below in conjunction with Figures 1-2.

The embodiment of the present application discloses an embedded steel pipe column foot structure.

Referring to Figure 1, the embedded steel pipe column foot structure includes a connecting disk 11 arranged at the bottom of the steel pipe 1. The connecting disk 11 is coaxially connected to an inserting column 2. The maximum outer diameter of the inserting column 2 is not less than the outer diameter of the steel pipe 1; The inserting column 2 includes a circular ring 21 and a circular cone 22 integrally formed with the circular ring 21 .

Along the direction from the column foot to the steel pipe 1, the outer diameter of the circular cone 22 gradually increases. At the same time, the tangent value of the slope angle of the outer peripheral side wall of the circular cone 22 ranges from (4-6):1, preferably 5:1, so that the circular cone 22 The two opposite side walls can form a triangular-like structure to improve the stress stability. At the same time, the outer diameter of the outer wall of the truncated cone 22 with a tangent value in the range of (4-6):1 slowly increases, reducing the slope of the truncated cone 22. Excessive size makes it difficult to match the foundation size; the steel pipe 1 is provided with a fixing component 3 for fixedly connecting the inserting column 2 to the connecting plate 11, and the fixing component 3 is arranged between the ring 21 and the connecting plate 11.

Since the outer diameter of the truncated cone 22 gradually increases, firstly, it can be adapted to more foundation piles with different apertures to form a snap-in effect; secondly, under the gravity of the steel pipe 1, the truncated cone 22 can be suppressed, so that the truncated cone 22 and The inner wall of the hole in the foundation has an interference fit and a tight effect. As a result, the friction force between the circular cone 22 and the foundation is increased, and the overturning and bending resistance are correspondingly improved.

In order to further improve the friction between the truncated cone 22 and the inner wall of the hole, a friction structure (not shown) is provided on the outer peripheral wall of the truncated cone 22 to increase the friction of the outer wall. The friction structure may be bumps or ridges formed by spot welding.

During the specific construction, the piles or other foundations below the ground are first completed, and holes are reserved for the round table 22 of the steel pipe 1 to be inserted. Then the steel pipe 1 is hoisted, and the round table 22 is inserted into the foundation hole on the ground and pre-fixed. When concrete is poured, cured, molded and covered on the outer wall of the steel pipe 1 and filled in the hollow inner wall, a stable support is formed so that subsequent crown beam construction can be carried out on the top of the steel pipe 1.

Since the friction force of the arc surface of the outer wall of the steel pipe 1 is low when the poured concrete is connected to the outer wall of the steel pipe 1, a plurality of pegs 12 are connected to the outer wall of the steel pipe 1 in this application. The horizontal/vertical spacing of the plurality of pegs 12 Set to 200mm, when the concrete is formed, the studs 12 can be inserted into the concrete, so that the two have an anchoring effect; at the same time, in order to reduce the seepage of solution and water stains during the construction process or later, the outer peripheral wall of the steel pipe 1 is fixed with a water stop plate 13. The water-stop plate 13 is concentrically arranged with the steel pipe 1. A rubber ring 131 is set on the upper part of the steel pipe 1 and the water-stop plate 13. The rubber ring 131 can preferably be a rain-expansion water-stop strip, which will produce an expansion effect after swelling when exposed to the aqueous solution. Thereby, the gap between the outer wall of the steel pipe 1 and the concrete layer is blocked.

In order to improve the efficiency of construction and hoisting of the steel pipe 1, the steel pipe 1 in this application can be spliced in multiple sections. The two ends of the steel pipe 1 are correspondingly fixed with connecting disks 11, and the connecting disks 11 of the adjacent two ends of the steel pipe 1 are also fixed. It can be connected through the fixed components 3, so that the overall length of the steel pipe 1 can be adjusted conveniently and is suitable for different foundation constructions.

The fixing component 3 includes bolts 31 and nuts 32. After the bolts 31 pass through the ring 21 and the connecting plate 11, they are threadedly connected to the nuts 32. The bolts 31 and nuts 32 are provided with multiple groups, and the multiple groups of bolts 31 and nuts 32 are connected along the The disk 11 is arranged circumferentially.

Of course, in other embodiments, the bolt 31 can replace the insertion rod or pin fixed on the top wall of one of the connecting plates 11 , and correspondingly, the connecting plate 11 of the other steel pipe 1 is provided with the insertion rod/pin. Interference-fit pin holes provide securement.

In order to facilitate the later pouring of concrete in the hollow inner cavity of the steel pipe 1 and balance the air pressure, a plurality of ventilation holes 111 are provided on the connecting plate 11, and the positions of the multiple ventilation holes 111 correspond to the hollow inner cavity of the steel pipe 1; preferably, the ventilation holes 111 are provided in the hollow inner cavity of the steel pipe 1. There are four holes 111 , and the four ventilation holes 111 are arranged along the circumferential direction of the connecting plate 11 . The diameter of the ventilation holes 111 is 45-60 mm, so as to balance the air pressure without affecting the strength of the connecting plate 11 .

In order to further improve the connection stability of the connecting plate 11, a plurality of stiffening ribs 14 are fixed on the outer periphery of the steel pipe 1. One side of the stiffening ribs 14 is fixed to the outer wall of the steel pipe 1, and the other side is away from the connecting plate 11. It is fixed to the side wall of the inserting column 2; a plurality of stiffening ribs 14 are also evenly arranged along the outer peripheral wall of the steel pipe 1.

The stiffening rib plate 14 can be a triangular plate with a triangular vertical cross-section, or a trapezoidal plate, so that the stiffening rib plate 14 can have an inclined edge. After two adjacent sections of steel pipes 1 are connected, the stiffening rib plates 14 on both sides They can form resistance to each other and improve the stability of the connection.

The implementation principle of the embedded steel pipe column foot structure in the embodiment of this application is: multi-section steel pipes 1 are conveniently connected through the fixing assembly 3 and the connecting plate 11, so that the overall length of the steel pipe 1 can be adjusted according to different construction conditions, and the column feet are connected to the foundation. When the outer diameter of the circular cone 22 gradually increases, firstly, it can be adapted to more foundation piles with different apertures to form a snap-in effect; secondly, under the gravity of the steel pipe 1, the circular cone 22 can be suppressed, so that the circular cone 22 can be suppressed. 22 and the inner wall of the hole in the foundation have an interference fit and tightness effect. Therefore, the friction force of the connection surface between the circular cone 22 and the foundation is increased, and the anti-overturning and anti-bending capabilities are correspondingly improved.

Unless otherwise defined, the technical terms or scientific terms used in this application shall have the usual meaning understood by a person with ordinary skills in the field to which this application belongs. "First", "second", "third" and similar words used in the description and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "a" or "one" do not indicate a quantitative limit either, but rather indicate the presence of at least one. "Including" or "includes" and other similar words mean that the elements or things appearing before "includes" or "includes" cover the elements or things listed after "includes" or "includes" and their equivalents, and do not exclude others. Component or object. "Up", "down", "left", "right", etc. are only used to express relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

The above are all optional embodiments of the present application and do not limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application shall be covered by the protection scope of the present application. Inside.

Claims (9)

1. An embedded steel pipe column foot structure, characterized by: including a connecting plate (11) arranged at the bottom of the steel pipe (1), and an inserting column (2) is coaxially connected to the connecting plate (11), The maximum outer diameter of the insertion post (2) is not less than the outer diameter of the steel pipe (1); The steel pipe (1) is provided with a fixing component (3) for fixedly connecting the plug (2) to the connecting plate (11). 2. An embedded steel pipe column foot structure according to claim 1, characterized in that: the insertion column (2) includes a circular ring (21) and a truncated cone (21) integrally formed with the circular ring (21). 22), along the direction from the ring (21) to the steel pipe (1), the outer diameter of the truncated cone (22) gradually increases; The fixing component (3) is arranged between the ring (21) and the connecting plate (11). 3. An embedded steel pipe column foot structure according to claim 2, characterized in that: the fixing component (3) includes bolts (31) and nuts (32), and the bolts (31) pass through the After the ring (21) and the connecting plate (11) are connected, they are threadedly connected with the nut (32). 4. An embedded steel pipe column foot structure according to claim 2, characterized in that: the connecting plate (11) is provided with a plurality of ventilation holes (111), and a plurality of the ventilation holes (111) The position corresponds to the hollow inner cavity of the steel pipe (1). 5. An embedded steel pipe column foot structure according to any one of claims 1 to 4, characterized in that: a plurality of stiffening ribs (14) are fixed on the outer periphery of the steel pipe (1), and the One side of the stiffening rib (14) is fixed to the outer wall of the steel pipe (1), and the other side is fixed to the side wall of the connecting plate (11) away from the insertion column (2); a plurality of The stiffening ribs (14) are evenly arranged along the outer peripheral wall of the steel pipe (1). 6. An embedded steel pipe column foot structure according to claim 1, characterized in that: a plurality of pegs (12) are connected to the outer wall of the steel pipe (1), and a plurality of said pegs The horizontal/vertical spacing of (12) is set to 200mm. 7. An embedded steel pipe column foot structure according to any one of claims 2 to 4, characterized in that: the tangent value of the slope angle of the outer peripheral side wall of the truncated cone (22) ranges from 4 to 6:1 . 8. An embedded steel pipe column foot structure according to claim 2, characterized in that: the outer peripheral wall of the truncated cone (22) is provided with a friction structure for increasing the friction of the outer wall. 9. An embedded steel pipe column foot structure according to claim 1, characterized in that: a water stop plate (13) is fixedly connected to the outer peripheral wall of the steel pipe (1), and the water stop plate (13) Arranged concentrically with the steel pipe (1), a rubber ring (131) is set on the upper part of the steel pipe (1) and the water stop plate (13).