Ultra-deep foundation pit supporting structure

Abstract

The utility model discloses an ultra-deep foundation pit supporting structure, which relates to the technical field of foundation pit construction and comprises a plurality of supporting frames transversely distributed and fixed on supporting piles. The enclosing purlins are arranged on the supporting frames; the fixing assemblies are transversely distributed on the enclosing purlin, each fixing assembly comprises a first hanging bar and a second hanging bar, the upper end of each first hanging bar is fixed to the corresponding supporting pile main bar, the lower end of each first hanging bar extends into the corresponding enclosing purlin, the upper end of each second hanging bar is fixed to the corresponding supporting pile main bar, and the lower end of each second hanging bar penetrates through the corresponding enclosing purlin and is fixed to a supporting frame. The supporting frame is matched with the first hanging bar and the second hanging bar to fix the enclosing purlin, so that the stability of the enclosing purlin structure is improved, the vertical section, the horizontal section and the hook-shaped section at the lower end of the first hanging bar are located in the enclosing purlin, so that the first hanging bar and the enclosing purlin are tightly combined and prevented from being separated, the second hanging bar and the supporting frame are fixed, the supporting frame is pulled upwards, and the enclosing purlin structure is formed. Therefore, the supporting frame, the enclosing purlins and the second hanging bars are connected into a whole, and the overall stability of the supporting structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit construction, in particular to a support structure for ultra-deep foundation pits. Background Art

[0002] In order to ensure the safety of underground structures and the surrounding environment of foundation pits, protective measures such as support and reinforcement need to be applied to the side walls and the surrounding areas of the foundation pits. The current foundation pit support system usually includes a retaining structure arranged around the edge of the foundation pit, a collar beam arranged inside the retaining structure, and a number of support beams arranged between the collar beams. The support beams are braced against the collar beams on opposite sides to form a support for the foundation pit and ensure the support strength of the foundation pit support system.

[0003] The common collar structure has a simple overall structure and is prone to forward slippage when stressed during installation and use. The strength and stability of the connection parts between each connection structure and the corresponding retaining structure are poor, resulting in insufficient overall stability of the collar structure. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problems in the prior art and propose a support structure for ultra-deep foundation pits with stable connection structures and strong overall stability.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] An ultra-deep foundation pit support structure, comprising:

[0007] A plurality of support frames, which are horizontally distributed and fixed on the retaining piles;

[0008] A collar, which is arranged on each support frame;

[0009] A plurality of fixing components, each fixing component is horizontally distributed on the collar, and each fixing component includes a first hanger bar and a second hanger bar. The upper end of the first hanger bar is fixed to the main reinforcement of the retaining pile, and the lower end extends into the collar. The upper end of the second hanger bar is fixed to the main reinforcement of the retaining pile, and the lower end penetrates through the collar and is fixed to a support frame.

[0010] Furthermore, each fixing component is provided with one first hanger bar and two second hanger bars. One first hanger bar and two second hanger bars penetrate into the collar in a "pin" shape, and the penetration position of the first hanger bar is on the side far from the retaining pile, and the penetration positions of the two second hanger bars are on the side close to the retaining pile.

[0011] Furthermore, the first hanger bar and the main reinforcement of the retaining pile are fixed by double-sided welding, and the second hanger bar and the main reinforcement of the retaining pile are fixed by double-sided welding.

[0012] Furthermore, the first hanger includes an inclined section, a vertical section, a horizontal section and a hook section from top to bottom, the inclined section penetrates into the purlin, the vertical section is located on the side away from the supporting pile, the horizontal section is located at the lower part of the purlin, and the hook section is located on the side close to the supporting pile.

[0013] Furthermore, the angle between the inclined section and the vertical section is 140°, and the connection portion between the inclined section and the vertical section is located in the middle of the surrounding purlin.

[0014] Furthermore, the support frame is made of angle steel, and the support frame is L-shaped, and one side of the support frame is fixed to the side wall of the supporting pile by expansion bolts.

[0015] Furthermore, a through hole is opened on the support frame, and the lower end of the second suspension rod passes through the through hole. The lower end of the second suspension rod is provided with a threaded groove, and a gasket and a nut are provided to fix the lower end of the second suspension rod to the support frame.

[0016] Furthermore, the second suspension rod is arranged obliquely.

[0017] Furthermore, the lower end of the second hanger rod inserted into the purlin is vertical.

[0018] Furthermore, it also includes a support beam and a lattice column, the support beam is arranged on one side of the surrounding purlin, and the lattice column is arranged at the bottom of the support beam.

[0019] The beneficial effects of the utility model are:

[0020] The ultra-deep foundation pit support structure in the utility model supports the bottom of the purlin through multiple support frames, and cooperates with the first hangers and the second hangers to fix the purlin from the top of the purlin, thereby improving the stability of the purlin structure, and the vertical section, horizontal section and hook section of the lower end of the first hanger are located inside the purlin, so that the lower end of the first hanger is tightly combined with the purlin to prevent the first hanger from separating from the purlin, and the second hanger is fixed to the support frame at the bottom of the purlin to pull the support frame upward, so that the support frame, the purlin and the second hanger are connected as a whole, thereby improving the overall stability of the support structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic cross-sectional view of the ultra-deep foundation pit support structure proposed by the utility model;

[0022] Figure 2 This is a schematic diagram of the top view of the ultra-deep foundation pit support structure proposed by the utility model.

[0023] In the figure: 1 supporting pile, 101 supporting pile main reinforcement, 2 first hanger bar, 3 second hanger bar, 301 inclined section, 302 vertical section, 303 horizontal section, 304 hook section, 4 surrounding purlin, 5 supporting beam, 6 lattice column, 7 supporting frame, 8 nut, 801 gasket. DETAILED DESCRIPTION

[0024] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0027] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0028] Reference Figure 1-2 , ultra-deep foundation pit support structure, is used for the support of ultra-deep foundation pits, in order to make the support structure connection firm and improve the overall stability.

[0029] The ultra-deep foundation pit support structure includes a plurality of support frames 7, a purlin 4 and a plurality of fixing components;

[0030] A plurality of supporting piles 1 are arranged in the foundation pit to form the side walls of the foundation pit, a plurality of supporting frames 7 are transversely distributed and fixed on the side walls of the foundation pit formed by the supporting piles 1, and the purlin 4 is arranged on each supporting frame 7. The supporting frame 7 is made of angle steel, and the supporting frame 7 is L-shaped, one side of which is fixed to the side wall of the supporting pile 1 by expansion bolts, and each fixing component is transversely distributed on the purlin 4, and a plurality of supporting frames 7 support the bottom of the purlin 4, and cooperate with each fixing component to fix the purlin 4 from the top of the purlin 4, thereby improving the stability of the purlin structure.

[0031] Each fixed component includes a first suspension bar 2 and a second suspension bar 3. The first suspension bar 2 successively includes an inclined section 301, a vertical section 302, a horizontal section 303, and a hook section 304 from top to bottom. The lower end of the inclined section 301 penetrates into the collar beam 4, and the vertical section 302, the horizontal section 303, and the hook section 304 are all located inside the retaining pile 1. The angle between the inclined section 301 and the vertical section 302 is 140°, and the connection part between the inclined section 301 and the vertical section 302 is located in the middle of the collar beam 4. The vertical section 302 is located on the side away from the retaining pile 1, the horizontal section 303 is located in the lower part of the collar beam 4, and the hook section 304 is located on the side close to the retaining pile 1. The vertical section 302, the horizontal section 303, and the hook section 304 at the lower end of the first suspension bar 2 are cast inside the collar beam 4, so that the lower end of the first suspension bar 2 is tightly combined with the collar beam 4, preventing the first suspension bar 2 from separating from the collar beam 4. The upper end of the first suspension bar 2 is fixed to the main reinforcement 101 of the retaining pile by double-sided welding.

[0032] The second suspension bar 3 is inclined. The upper end of the second suspension bar 3 is fixed to the main reinforcement 101 of the retaining pile by double-sided welding, and the lower end penetrates through the collar beam 4. The lower end of the second suspension bar 3 penetrating into the collar beam 4 is vertical. A through hole is provided on the support frame 7. The lower end of the second suspension bar 3 penetrates through the through hole, and a threaded groove is provided at the lower end of the second suspension bar 3, and a gasket 801 and a nut 8 are provided to fix the lower end of the second suspension bar 3 to the support frame 7. The second suspension bar 3 is fixed to the support frame 7 at the bottom of the collar beam 4, pulling the support frame 7 upward, so that the support frame 7, the collar beam 4, and the second suspension bar 3 are connected into a whole, improving the overall stability of the support structure.

[0033] Each fixed component is provided with one first suspension bar 2 and two second suspension bars 3. One first suspension bar 2 and two second suspension bars 3 penetrate into the collar beam 4 in a "pin" shape, and the penetration position of the first suspension bar 2 is located on the side away from the retaining pile 1, and the penetration positions of the two second suspension bars 3 are located on the side close to the retaining pile 1. The first suspension bar 2 and the second suspension bars 3 penetrating into the collar beam 4 in a "pin" shape can make the force on the top of the collar beam 4 uniform, thereby effectively fixing the collar beam 4.

[0034] In addition, in order to further improve the stability of the support structure;

[0035] A support beam 5 is provided on one side of the collar beam 4, and a lattice column 6 is provided at the bottom of the support beam 5. The support beam 5 supports the side of the collar beam 4, and the lattice column 6 supports the bottom of the support beam 5, thereby improving the stability of the support structure.

[0036] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent replacements or changes, and should be covered by the protection scope of the present invention.

Claims

1. Ultra-deep foundation pit support structure, characterized in that: Including: A plurality of support frames (7), which are horizontally distributed and fixed on the retaining piles (1); A collar (4), which is arranged on each of the support frames (7); A plurality of fixing components, each of the fixing components is horizontally distributed on the collar (4), and each fixing component includes a first suspender (2) and a second suspender (3). The upper end of the first suspender (2) is fixed to the main reinforcement (101) of the retaining pile, and the lower end extends into the collar (4). The upper end of the second suspender (3) is fixed to the main reinforcement (101) of the retaining pile, and the lower end penetrates through the collar (4) and is fixed to one of the support frames (7).

2. The ultra-deep foundation pit support structure according to claim 1 is characterized in that: Each fixing component is provided with one first suspender (2) and two second suspenders (3). One first suspender (2) and two second suspenders (3) penetrate into the collar (4) in a "pin" shape, and the penetration position of the first suspender (2) is on the side away from the retaining pile (1), and the penetration positions of the two second suspenders (3) are on the side close to the retaining pile (1).

3. The ultra-deep foundation pit support structure according to claim 1 is characterized in that: The first suspender (2) is fixed to the main reinforcement (101) of the retaining pile by double-sided welding, and the second suspender (3) is fixed to the main reinforcement (101) of the retaining pile by double-sided welding.

4. The ultra-deep foundation pit support structure according to claim 1, characterized in that: The first suspender (2) sequentially includes an inclined section (301), a vertical section (302), a horizontal section (303) and a hook section (304) from top to bottom. The inclined section (301) penetrates into the collar (4), the vertical section (302) is on the side away from the retaining pile (1), the horizontal section (303) is at the lower part inside the collar (4), and the hook section (304) is on the side close to the retaining pile (1).

5. The ultra-deep foundation pit support structure according to claim 4 is characterized in that: The angle between the inclined section (301) and the vertical section (302) is 140°, and the connection part between the inclined section (301) and the vertical section (302) is in the middle inside the collar (4).

6. The ultra-deep foundation pit support structure according to claim 1, characterized in that: The support frame (7) is made of angle steel, and the support frame (7) is L-shaped, and one side of it is fixed to the side wall of the retaining pile (1) by expansion bolts.

7. The ultra-deep foundation pit support structure according to claim 1, characterized in that: Through holes are formed in the support frame (7), the lower end of the second suspender (3) penetrates through the through holes, and the lower end of the second suspender (3) is provided with a threaded groove, and a gasket (801) and a nut (8) are provided to fix the lower end of the second suspender (3) to the support frame (7).

8. The ultra-deep foundation pit support structure according to claim 1, characterized in that: The second suspender (3) is inclined.

9. The ultra-deep foundation pit support structure according to claim 1, characterized in that: The lower end of the second suspender (3) penetrating into the collar (4) is vertical.

10. The ultra-deep foundation pit support structure according to claim 1, characterized in that: It further includes a support beam (5) and a lattice column (6). The support beam (5) is arranged on one side of the collar (4), and the lattice column (6) is arranged at the bottom of the support beam (5).

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