I-shaped steel joint device for underground diaphragm wall at tunnel portal position of metro section

Abstract

The utility model relates to a metro section tunnel portal position underground diaphragm wall I-steel joint device which comprises channel steel covering the vertical splicing position of a first I-steel and a second I-steel, and the first I-steel is narrower than the second I-steel; the first welding plate is welded on the lower end surface of the first I-shaped steel; the second welding plate is welded to the upper end face of the second I-shaped steel, and the second welding plate is wider than the first welding plate; the upper end of the trapezoidal reinforcing plate is welded below the first welding plate, and the lower end of the trapezoidal reinforcing plate is welded above the second welding plate; the bolt and nut assembly is connected with the channel steel web, the first I-shaped steel and the second I-shaped steel flange in a penetrating mode and fastens the upper end of the channel steel and the first I-shaped steel; fastening the lower end of the channel steel with the second I-shaped steel; and the bracket is fixedly arranged on one side of the channel steel. The device is favorable for lengthening the I-shaped steel at the position of the tunnel portal.

Description

Technical Field

[0001] The utility model relates to the field of tunnel diaphragm walls, in particular to an I-beam joint device for an underground diaphragm wall at a tunnel portal position in a subway section. Background Art

[0002] According to the conventional construction sequence, the portal width is generally constructed as the first width. Especially when fiberglass reinforcement is used within the portal area, steel sections are required on both sides to increase the overall stability of the reinforcement cage during lifting. I-beams are often used as steel sections, and when I-beams are extended, I-beam joints are required. To ensure the stability of the portal, a steel beam is added above the portal steel ring. When the portal is large, the cross-sectional dimensions of the steel beam increase accordingly, resulting in a variable cross-section at the intersection of the steel beam and the ground-connected wall. This can easily lead to excessive stress at the variable cross-section location, damaging the concrete structure. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide an I-beam joint device for an underground continuous wall at a subway section portal location, which can ensure that I-beams with different cross-sections can be connected at the upper and lower levels to ensure that I-beams with larger cross-sections are used at the portal location to match the portal steel beams with larger cross-sections and enhance the stability of the larger portal, while I-beams with ordinary cross-sections are used at other locations to ensure that the lifting and pouring of the steel bar holes inside the ground-connected wall are stable, which is conducive to optimizing cost issues and can also improve the overall stability of the ground-connected wall.

[0004] In order to solve the above problems, an I-beam joint device for underground continuous wall at the tunnel location of a subway section is adopted, which includes:

[0005] A channel steel covering the upper and lower joints of the first I-beam and the second I-beam, wherein the first I-beam is narrower than the second I-beam, a through hole is opened on the flange of the channel steel for the transverse reinforcement of the first reinforcement cage to pass through, and the transverse reinforcement of the first reinforcement cage is welded to the first I-beam and the second I-beam;

[0006] a first welding plate welded to the lower end surface of the first I-beam;

[0007] a second welding plate welded to the upper end surface of the second I-beam, wherein the second welding plate is wider than the first welding plate;

[0008] A trapezoidal reinforcing plate, narrow at the top and wide at the bottom, with its upper end welded to the bottom of the first welding plate and its lower end welded to the top of the second welding plate;

[0009] The bolt and nut assembly penetrates the web of the channel steel, the first I-beam and the second I-beam flanges, respectively fastening the upper end of the channel steel to the first I-beam and the lower end of the channel steel to the second I-beam;

[0010] The corbel is fixed on one side of the channel steel.

[0011] With this structure, the size of the first welding plate adapts to the size of the lower end face of the first I-beam; the size of the second welding plate adapts to the size of the upper end face of the second I-beam, and the first welding plate and the second welding plate are fixed by a trapezoidal reinforcing plate.

[0012] As a further improvement of the present invention, a first reinforcing plate is arranged between the trapezoidal reinforcing plate and the second welded plate, and the transverse steel bars of the first steel cage are also welded to the first reinforcing plate.

[0013] Adopting such a structure facilitates strengthening the connection relationship between the trapezoidal reinforcement plate and the second welding plate, and is also beneficial for welding and fixing the transverse reinforcement of the first reinforcement cage.

[0014] As a further improvement of the present invention, the first reinforcing plate is triangular in shape, the second reinforcing plate is fixed to the inner wall of the channel steel flange, and the second reinforcing plate is in an inverted triangular shape, which is spliced ​​with the first reinforcing plate to form a rectangle.

[0015] Adopting such a structure is conducive to the stable installation of the I-beam joint.

[0016] As a further improvement of the present invention, a gate lintel is placed on the corbel.

[0017] With this structure, the corbel is convenient for installing the portal lintel.

[0018] As a further improvement of the present invention, a tunnel gate steel ring is provided below the tunnel gate lintel.

[0019] With this structure, the portal steel ring is set below the portal lintel.

[0020] As a further improvement of the present invention, a second steel cage is provided on the upper side of the portal lintel.

[0021] With this structure, the portal lintel provides an installation platform, which is convenient for installing the second reinforcement cage of the ground-connected wall above the portal.

[0022] As a further improvement of the present invention, radial steel bars are fixed circumferentially at intervals on the portal steel ring.

[0023] With such a structure, radial reinforcement can be easily embedded in concrete after pouring the concrete.

[0024] The utility model can ensure that I-beams with different cross-sections at the top and bottom are extended to ensure that I-beams with larger cross-sections are used at the portal position to match the portal steel beams with larger cross-sections and enhance the stability of the larger portal, while I-beams with ordinary cross-sections are used at other positions to ensure the stable lifting and pouring of the steel cage inside the ground-connected wall, which is beneficial to optimizing cost issues and can also improve the overall stability of the ground-connected wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the structure of the embodiment.

[0026] Figure numerals: 1. Channel steel; 101. Through hole; 2. First I-beam; 3. Second I-beam; 4. First welded plate; 5. Second welded plate; 6. Trapezoidal reinforcement plate; 7. Bolt and nut assembly; 8. Transverse reinforcement of first reinforcement cage; 9. First reinforcement plate; 10. Second reinforcement plate; 11. Portal lintel; 12. Portal steel ring; 13. Second reinforcement cage; 14. Radial reinforcement; 15. Corbel. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", 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, and do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance; in addition, unless otherwise expressly specified and limited, the terms "installed", "connected", and "connected" 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, an indirect connection through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Example 1

[0030] like Figure 1 As shown in the figure, the local structure of the I-beam joint position is shown. An I-beam joint device for underground continuous wall at the tunnel position of a subway section includes:

[0031] The channel steel 1 covers the upper and lower joints of the first I-beam 2 and the second I-beam 3, wherein the first I-beam 1 is narrower than the second I-beam 3. The flange of the channel steel 1 is provided with through holes 101 for the transverse reinforcement bars 8 of the first reinforcement cage to pass through, and the transverse reinforcement bars 8 of the first reinforcement cage are welded to the first I-beam 2 and the second I-beam 3;

[0032] A first welding plate 4, which is welded to the lower end surface of the first I-beam 2;

[0033] A second welding plate 5 , which is welded to the upper end surface of the second I-beam 3 , and the second welding plate 5 is wider than the first welding plate 4 ;

[0034] A trapezoidal reinforcing plate 6, which is narrow at the top and wide at the bottom, with its upper end welded to the bottom of the first welding plate 4 and its lower end welded to the top of the second welding plate 5;

[0035] The bolt and nut assembly 7 penetrates the web of the channel steel 1 and the flanges of the first I-beam 2 and the second I-beam 3, respectively fastening the upper end of the channel steel 1 to the first I-beam 2 and the lower end of the channel steel 1 to the second I-beam 3;

[0036] The corbel 15 is fixedly arranged on one side of the channel steel 1 .

[0037] With such a structure, the size of the first welding plate 4 is adapted to the size of the lower end face of the first I-beam 2; the size of the second welding plate 5 is adapted to the size of the upper end face of the second I-beam 3, and the first welding plate 4 and the second welding plate 5 are fixed by a trapezoidal reinforcing plate 6.

[0038] In this embodiment, a first reinforcing plate 9 is arranged between the trapezoidal reinforcing plate 6 and the second welded plate 5 , and the transverse steel bars 8 of the first steel cage are also welded to the first reinforcing plate 9 .

[0039] Adopting such a structure facilitates strengthening the connection between the trapezoidal reinforcement plate 6 and the second welding plate 5, and is also beneficial for welding and fixing the transverse reinforcement 8 of the first reinforcement cage.

[0040] In this embodiment, the first reinforcing plate 9 is triangular in shape, and the second reinforcing plate 10 is fixed to the inner wall of the flange of the channel steel 1. The second reinforcing plate 10 is in an inverted triangular shape and is spliced ​​with the first reinforcing plate 9 to form a rectangle.

[0041] Adopting such a structure is conducive to the stable installation of the I-beam joint.

[0042] In this embodiment, the portal lintel 11 is placed on the corbel 15 .

[0043] With such a structure, the corbel 15 is convenient for cooperating with the installation of the portal lintel 11 .

[0044] In this embodiment, a portal steel ring 12 is provided below the portal lintel 11 .

[0045] With such a structure, the portal steel ring 12 is arranged below the portal lintel 11 .

[0046] In this embodiment, a second steel cage 13 is provided on the upper side of the portal lintel 11 .

[0047] With such a structure, the portal lintel 11 provides an installation platform, which facilitates the installation of the second reinforcement cage 13 of the ground-connected wall above the portal.

[0048] As a further improvement of the present invention, radial steel bars 14 are fixed circumferentially at intervals on the portal steel ring 12 .

[0049] With such a structure, the radial reinforcement 14 can be easily embedded in the concrete after the concrete is poured.

[0050] The utility model can ensure that I-beams with different cross-sections at the top and bottom are extended to ensure that I-beams with larger cross-sections are used at the portal position to match the portal steel beams with larger cross-sections and enhance the stability of the larger portal, while I-beams with ordinary cross-sections are used at other positions to ensure the stable lifting and pouring of the steel cage inside the ground-connected wall, which is beneficial to optimizing cost issues and can also improve the overall stability of the ground-connected wall.

[0051] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, it is possible to make several equivalent substitutions or obvious modifications without departing from the concept of the present invention, and the performance or use are the same, and all of them should be considered to fall within the scope of protection of the present invention.

Claims

1. An I-beam joint device for underground continuous wall at the tunnel entrance of a subway section, characterized in that include: A channel steel (1) covers the upper and lower joints of the first I-beam (2) and the second I-beam (3), wherein the first I-beam (2) is narrower than the second I-beam (3), and a through hole (101) is provided on the flange of the channel steel (1) for the transverse steel bars (8) of the first reinforcement cage to pass through, and the transverse steel bars (8) of the first reinforcement cage are welded to the first I-beam (2) and the second I-beam (3); A first welding plate (4) welded to the lower end surface of the first I-beam (2); a second welding plate (5) welded to the upper end surface of the second I-beam (3), wherein the second welding plate (5) is wider than the first welding plate (4); A trapezoidal reinforcing plate (6) is narrow at the top and wide at the bottom, with its upper end welded to the bottom of the first welding plate (4) and its lower end welded to the top of the second welding plate (5); The bolt and nut assembly (7) penetrates the web of the channel steel (1), the first I-beam (2), and the flange of the second I-beam (3), respectively fastening the upper end of the channel steel (1) to the first I-beam (2); and fastening the lower end of the channel steel (1) to the second I-beam (3); The corbel (15) is fixedly arranged on one side of the channel steel (1).

2. The I-beam joint device for underground continuous wall at the tunnel location of a subway section according to claim 1 is characterized in that A first reinforcing plate (9) is provided between the trapezoidal reinforcing plate (6) and the second welding plate (5), and the first steel cage transverse steel bars (8) are also welded to the first reinforcing plate (9).

3. The I-beam joint device for underground continuous wall at the tunnel location of a subway section according to claim 2 is characterized in that The first reinforcing plate (9) is triangular in shape, and the second reinforcing plate (10) is fixed to the inner wall of the flange of the channel steel (1). The second reinforcing plate (10) is in an inverted triangular shape and is spliced ​​with the first reinforcing plate (9) to form a rectangle.

4. The I-beam joint device for underground continuous wall at the tunnel location of a subway section according to claim 1 is characterized in that The gate lintel (11) is placed on the corbel (15).

5. The I-beam joint device for underground continuous wall at the tunnel location of a subway section according to claim 4 is characterized in that A tunnel gate steel ring (12) is provided below the tunnel gate lintel (11).

6. The I-beam joint device for underground continuous wall at the subway section portal location according to claim 5 is characterized in that A second steel cage (13) is provided on the upper side of the portal lintel (11).

7. The I-beam joint device for underground continuous wall at the tunnel location of a subway section according to claim 5 is characterized in that Radial steel bars (14) are fixed circumferentially at intervals on the portal steel ring (12).

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