Connecting structure of combined type steel support and enclosing purlin structure concrete triangle

Abstract

The utility model discloses a connecting structure of a combined type steel support and an enclosing purlin structure concrete triangle, and belongs to the technical field of building foundation pit engineering. Comprising a combined type steel support, a purlin structure concrete triangle and a connecting structure, the connecting structure is used for fixedly connecting the combined type steel support and the purlin structure concrete triangle, and the connecting structure is formed by machining a Q235 embedded steel plate and a high-strength bolt sleeve to serve as a horizontal steel beam connecting piece of the purlin structure concrete triangle and the combined type steel support. The enclosing purlin structure concrete triangle and the combined type steel support form an integral horizontal stress system through the connecting piece and the high-strength bolt, so that the enclosing purlin structure concrete triangle and the combined type steel support are firmly connected, and the hidden danger that a gap between the enclosing purlin structure concrete triangle and the combined type steel support is not flat is reduced; the overall stress performance of the prestressed profile steel combined support horizontal member after pressurization is ensured, meanwhile, the embedded steel plate can be recycled, and the engineering cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of building foundation pit engineering, in particular to a connection structure of a combined steel support and a concrete triangle of a surrounding purlin structure. Background Art

[0002] The steel composite support system is a horizontal foundation pit support form after the reinforced concrete support. The SMW method pile combined with the prestressed steel composite support technology is widely used in deep foundation pit projects in soft soil areas. Compared with traditional reinforced concrete support, it can improve construction efficiency, save construction time, and realize the recycling of resources.

[0003] During construction, the vertical retaining structure and the horizontal steel prestressed composite support are connected through the concrete triangle of the purlin structure. Currently, welding is used to directly fix the horizontal steel prestressed composite support and the concrete triangle of the purlin structure. The accuracy of the connection part and the flatness of the horizontal surface of the connection cannot be ensured, and uniform horizontal force cannot be guaranteed after the prestress is applied. Utility Model Content

[0004] The purpose of the utility model is to provide a connection structure of a combined steel support and a concrete triangle of a purlin structure, so as to solve the problems in the prior art of the fixed connection of a horizontal steel prestressed combined support and a concrete triangle of a purlin structure that the accuracy of the connection part and the flatness of the connection horizontal surface cannot be ensured, and the uniform horizontal force cannot be ensured after the prestress is applied.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A connection structure between a combined steel support and a concrete triangle of a purlin structure, comprising a combined steel support and a concrete triangle of a purlin structure, and also comprising a connection structure for fixedly connecting the combined steel support and the concrete triangle of the purlin structure, wherein the connection structure comprises an embedded steel plate, a bolt sleeve and a connecting bolt, wherein one side of the embedded steel plate is fixedly connected to the concrete triangle of the purlin structure, a plurality of the bolt sleeves are fixedly arranged on a side of the embedded steel plate away from the concrete triangle of the purlin structure, and the bolt sleeves are all fixedly connected to a side of the combined steel support close to the embedded steel plate, and a connecting bolt is threadedly connected in each of the bolt sleeves.

[0007] As a further solution of the utility model: a plurality of embedded steel bars are evenly and fixedly arranged in the concrete triangle of the perimeter purlin structure, a plurality of welding holes are opened on the side of the embedded steel plate close to the concrete triangle of the perimeter purlin structure, and the ends of the embedded steel bars close to the concrete triangle of the perimeter purlin structure are fixedly welded in the corresponding welding holes.

[0008] As a further solution of the utility model: the length of the embedded steel bars is not less than 300 mm.

[0009] As a further solution of the utility model: the embedded steel plate is a Q235 steel plate with a thickness of 10 mm.

[0010] As a further solution of the utility model: the specification of the connecting bolt is M24*60 bolt.

[0011] As a further solution of the utility model: eight bolt sleeves are evenly welded on each of the embedded steel plates, four on the upper and four on the lower.

[0012] The utility model has the following beneficial effects:

[0013] The utility model arranges a connection structure between the combined steel support and the concrete triangle of the purlin structure. The connection structure is formed by Q235 embedded steel plates and high-strength bolt sleeves and serves as a horizontal steel beam connecting piece between the concrete triangle of the purlin structure and the combined steel support. The concrete triangle of the purlin structure forms an integral horizontal force-bearing system with the combined steel support through the connecting piece and the high-strength bolts, thereby ensuring that the concrete triangle of the purlin structure and the combined steel support are connected and fastened, reducing the hidden danger of uneven gap between the concrete triangle of the purlin structure and the combined steel support, ensuring the overall force-bearing performance of the horizontal component of the prestressed steel combined support after pressurization, and at the same time, the embedded steel plate can be used in a turnover manner, saving engineering costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings.

[0015] Figure 1 It is a schematic diagram of the connection structure of the utility model of the combined steel support and the concrete triangle of the purlin structure;

[0016] Figure 2 yes Figure 1 A schematic diagram of the structure enlargement in the middle;

[0017] Figure 3 It is a schematic diagram of the connection structure and embedded steel bars of the utility model.

[0018] In the figure: 1. Composite steel support; 2. Concrete triangle of purlin structure; 3. Connection structure; 31. Embedded steel plate; 32. Bolt sleeve; 33. Connecting bolt; 4. Embedded steel bar. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "front", "back", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation. Therefore, it should not be understood as a limitation on the present invention.

[0021] In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it 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, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0022] See also Figure 1 As shown, the embodiment of the utility model is a connection structure of a combined steel support and a purlin structure concrete triangle, comprising a combined steel support 1, a purlin structure concrete triangle 2 and a connection structure 3. The connection structure 3 is used to fix the combined steel support 1 and the purlin structure concrete triangle 2, and the purlin structure concrete triangle 2 forms a horizontal force system with the combined steel support 1 through the connection structure 3.

[0023] See also Figure 2 and Figure 3 As shown, the connection structure 3 includes an embedded steel plate 31, a bolt sleeve 32 and a connecting bolt 33. One side of the embedded steel plate 31 is fixedly connected to the concrete triangle 2 of the surrounding purlin structure. In a specific embodiment, the embedded steel plate 31 can be a Q235 steel plate with a thickness of 10 mm (a steel material with a yield strength of about 235). A plurality of high-strength bolt sleeves 32 are fixedly arranged on the side of the embedded steel plate 31 away from the concrete triangle 2 of the surrounding purlin structure, and the bolt sleeves 32 are fixedly connected to the side of the combined steel support 1 close to the embedded steel plate 31. A connecting bolt 33 is screwed in each bolt sleeve 32. In a specific embodiment, the specification of the connecting bolt 33 is selected as an M24*60 bolt, that is, the effective diameter of the bolt is 24 mm, and the effective thread length is 60 mm. Eight bolt sleeves 32 are evenly welded on each embedded steel plate 31, four on the upper and four on the lower.

[0024] Furthermore, a plurality of embedded steel bars 4 are evenly and fixedly arranged in the concrete triangle 2 of the perimeter purlin structure, a plurality of welding holes are opened on the side of the embedded steel plate 31 close to the concrete triangle 2 of the perimeter purlin structure, and the ends of the embedded steel bars 4 close to the concrete triangle 2 of the perimeter purlin structure are fixedly welded in the corresponding welding holes. By arranging a plurality of embedded steel bars 4, the embedded steel plate 31 and the concrete triangle 2 of the perimeter purlin structure can be more firmly connected together, thereby improving the structural stability.

[0025] When using this utility model:

[0026] The first step is to carry out steel bar binding construction of the purlin and concrete triangle when the earthwork is excavated to the purlin elevation, so as to form the purlin structure concrete triangle 2;

[0027] The second step is to confirm the position of the embedded steel plate 31 according to the design drawing, and process and connect the embedded steel bar 4 with the embedded steel plate 31 to complete the installation of the embedded steel plate 31;

[0028] The third step is to pour concrete for the surrounding purlin and concrete triangle after the embedded steel plate 31 is embedded;

[0029] Step 4: After the concrete strength reaches the design strength, the horizontal composite steel support 1 is installed. After the horizontal composite steel support 1 is adjusted into place, the composite steel support 1 and the surrounding purlin structure concrete triangle 2 are connected into a whole by connecting with the embedded steel plate 31 through high-strength bolts;

[0030] The fifth step is to apply prestress to the horizontal steel supports.

[0031] The utility model provides a connection structure 3 between a combined steel support 1 and a concrete triangle 2 of a purlin structure. The connection structure 3 is formed by using a Q235 embedded steel plate 31 and a high-strength bolt sleeve 32 to serve as a horizontal steel beam connection piece between the concrete triangle 2 of the purlin structure and the combined steel support 1. The concrete triangle 2 of the purlin structure and the combined steel support 1 form an integral horizontal force-bearing system through the connection piece and the high-strength bolts, thereby ensuring that the concrete triangle 2 of the purlin structure and the combined steel support 1 are connected and fastened, reducing the hidden danger of uneven gap between the concrete triangle 2 of the purlin structure and the combined steel support 1, and ensuring the overall force-bearing performance of the prestressed steel combined support horizontal component after pressurization. At the same time, the embedded steel plate 31 can be used in a turnover manner, saving engineering costs.

[0032] The above detailed description of the preferred embodiments of the utility model should not be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A connection structure of a combined steel support and a purlin structure concrete triangle, comprising a combined steel support (1) and a purlin structure concrete triangle (2), characterized in that: It also includes a connection structure (3) for fixedly connecting the combined steel support (1) and the concrete triangle (2) of the purlin structure. The connection structure (3) includes an embedded steel plate (31), a bolt sleeve (32) and a connection bolt (33). One side of the embedded steel plate (31) is fixedly connected to the concrete triangle (2) of the purlin structure. A plurality of the bolt sleeves (32) are fixedly arranged on a side of the embedded steel plate (31) away from the concrete triangle (2) of the purlin structure. The bolt sleeves (32) are all fixedly connected to a side of the combined steel support (1) close to the embedded steel plate (31). One of the connection bolts (33) is screwed into each of the bolt sleeves (32).

2. The connection structure of the combined steel support and the concrete triangle of the purlin structure according to claim 1 is characterized by: A plurality of embedded steel bars (4) are evenly and fixedly arranged in the concrete triangle (2) of the purlin structure; a plurality of welding holes are opened on a side of the embedded steel plate (31) close to the concrete triangle (2) of the purlin structure; and the ends of the embedded steel bars (4) close to the concrete triangle (2) of the purlin structure are fixedly welded in the corresponding welding holes.

3. The connection structure of the combined steel support and the concrete triangle of the purlin structure according to claim 2 is characterized by: The length of the embedded steel bar (4) is not less than 300 mm.

4. The connection structure of the combined steel support and the concrete triangle of the purlin structure according to claim 1 is characterized by: The embedded steel plate (31) is a Q235 steel plate with a thickness of 10 mm.

5. The connection structure of the combined steel support and the concrete triangle of the purlin structure according to claim 1 is characterized by: The specification of the connecting bolt (33) is M24*60 bolt.

6. A connection structure of a combined steel support and a concrete triangle of a purlin structure according to any one of claims 1 to 5, characterized in that: Eight bolt sleeves (32) are evenly welded on each of the embedded steel plates (31), four on the upper and four on the lower.

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