Pile supporting structure of deep foundation pit

Abstract

The utility model discloses a pile supporting structure of a deep foundation pit. The pile supporting structure comprises front-row piles, rear-row piles with the tops higher than the front-row piles, front crown beams arranged at the tops of the front-row piles, rear crown beams arranged at the tops of the rear-row piles, surrounding purlins which are arranged on the rear-row piles and are as high as the front crown beams, and connecting beams with the two ends fixedly connected with the front crown beams and the surrounding purlins respectively. The two ends of the inclined strut assembly are fixedly connected with the front crown beam and the rear crown beam respectively; the inclined strut assembly comprises a front embedded part pre-embedded in the top of the front crown beam, a rear embedded part pre-embedded in the side, close to the front crown beam, of the front crown beam, H-shaped steel fixedly connected to the front embedded part, an adjusting base fixedly connected to the upper end of the H-shaped steel, and a supporting frame with the lower end abutting against the adjusting base and the upper end rotationally connected with a mounting base. And the mounting seat is fixedly connected with the rear embedded part. The utility model has the advantages that the construction time and the construction cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit supporting facilities, in particular to a pile supporting structure of a deep foundation pit. Background Art

[0002] Double-row pile support is a support structure technology used in deep foundation pits or slope projects. It is mainly used to ensure the safety and stability of surrounding buildings during construction. This support form usually includes two rows of piles, which can effectively resist large lateral earth pressure.

[0003] my country's utility model patent announcement number CN 221052617 U discloses a double-row "chair" pile support structure, which includes front-row piles, rear-row piles, front-row pile crown beams, rear-row pile crown beams, connecting beams, surrounding purlins, retaining plates, and plain concrete cushion layers; the front-row piles and rear-row piles are set in the foundation by drilling and pouring; the tops of the front-row piles and rear-row piles are respectively provided with integrated front-row pile crown beams and rear-row pile crown beams, and the height difference between the front-row piles and the rear-row piles is maintained at 60-70cm; the front ends of the rear-row piles are provided with integrated surrounding purlins, which are horizontally connected to the front-row pile crown beams through connecting beams to realize the connection between the front-row piles and the rear-row piles; retaining plates are provided between the rear-row piles, and a plain concrete cushion layer is provided at the bottom of the retaining plates. The rear-row piles of the patent rely on anchor rods to achieve connection and reinforcement with the soil. When the height of the front-row piles and the front-row piles increases, the upper bearing capacity of the front-row piles will be insufficient and cannot meet the support requirements of deep foundation pits. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a pile supporting structure for a deep foundation pit.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] A pile support structure for a deep foundation pit, comprising a front row of piles, a rear row of piles with tops higher than the front row of piles, a front crown beam arranged on the top of the front row of piles, a rear crown beam arranged on the top of the rear row of piles, a surrounding purlin arranged on the rear row of piles and at the same height as the front crown beam, and a connecting beam with two ends respectively fixed to the front crown beam and the surrounding purlin; it also comprises an oblique brace assembly with two ends respectively fixed to the front crown beam and the rear crown beam; the oblique brace assembly comprises a front embedded part embedded in the top of the front crown beam, a rear embedded part embedded in the front crown beam close to one side of the front crown beam, an H-shaped steel fixedly connected to the front embedded part, an adjustment seat fixedly connected to the upper end of the H-shaped steel, and a support frame with a lower end abutting against the adjustment seat and an upper end rotatably connected to a mounting seat; the mounting seat is fixedly connected to the rear embedded part.

[0007] Preferably, the upper wing plate of the H-shaped steel is provided with a strip hole; the adjustment seat includes a base plate located at the upper end of the H-shaped steel and fixedly connected to the H-shaped steel, a limit plate fixedly connected to the base plate and having a groove, and a reinforcing plate fixedly connected to the limit plate and the base plate; connecting holes corresponding to the strip holes are provided on the base plate, and the connecting holes and the strip holes are connected by bolts.

[0008] Preferably, the groove is arc-shaped.

[0009] Preferably, the mounting seat includes a base plate fixedly connected to the rear embedded component, and a connector fixedly connected to the base plate and rotatably connected to the support frame.

[0010] Preferably, the support frame includes an upper rod rotatably connected to the mounting seat, a lower rod abutting the adjustment seat, two parallel oblique rods whose ends are respectively fixed to the upper rod and the lower rod, and a plurality of evenly distributed short rods respectively fixed to the two oblique rods.

[0011] Preferably, the height difference between the tops of the front row of piles and the rear row of piles is 3-5m.

[0012] The above technical solution has the following advantages:

[0013] 1. The utility model adopts a diagonal brace assembly, which significantly enhances the upper bearing capacity of the front row of piles. This improvement enables the support system to fully meet the construction support requirements of deep foundation pits. The introduction of the diagonal brace assembly not only improves the stability of the overall structure, but also allows a larger height difference to be formed between the front row of piles and the rear row of piles, thereby providing a more flexible and efficient solution for different geological conditions and complex construction environments. The diagonal brace assembly of the utility model is quick and easy to assemble, which can effectively reduce construction time and cost, thereby improving the economic benefits and social value of the entire project.

[0014] 2. The diagonal brace assembly of the utility model has the characteristics of being dismantled and recycled after the main structure of the foundation pit is completed. After the main structure of the foundation pit is completed and the necessary backfilling is completed, the diagonal brace assembly can be safely dismantled. This feature not only helps to reduce the cost of the subsequent construction stage, but also promotes the recycling of building materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the front view of the utility model, in which only part of the structure is shown;

[0016] Figure 2 for Figure 1 Left view of;

[0017] Figure 3 is a stereogram of body 1;

[0018] Figure 4It is a three-dimensional enlarged view of the diagonal brace assembly;

[0019] Figure 5 is a three-dimensional enlarged view of the support frame;

[0020] Figure 6 This is an enlarged view of the structure of the H-beam and the node seat assembly;

[0021] Figure 7 for Figure 6 Stereoscopic image of

[0022] Figure 8 for Figure 4 A magnified view of part A;

[0023] In the figure:

[0024] 1-front row of piles, 2-rear row of piles, 3-front crown beam, 4-rear crown beam, 5-purlin, 6-connecting beam, 7-front embedded parts, 8-rear embedded parts, 9-H-shaped steel, 10-adjusting seat, 11-mounting seat, 12-support frame, 13-strip hole, 14-bottom plate, 15-groove, 16-limiting plate, 17-reinforcement plate, 18-connecting hole, 19-bolt, 20-base plate, 21-connecting head, 22-upper rod, 23-lower rod, 24-diagonal rod, 25-short rod. DETAILED DESCRIPTION

[0025] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] As shown in the accompanying drawings, a pile support structure for a deep foundation pit comprises a front row of piles 1, a rear row of piles 2 whose tops are higher than the front row of piles 1, a front crown beam 3 arranged on the top of the front row of piles 1, a rear crown beam 4 arranged on the top of the rear row of piles 2, a surrounding purlin 5 arranged on the rear row of piles 2 and at the same height as the front crown beam 3, and a connecting beam 6 whose two ends are respectively fixedly connected to the front crown beam 3 and the surrounding purlin 5; it also comprises an oblique brace assembly whose two ends are respectively fixedly connected to the front crown beam 3 and the rear crown beam 4; the oblique brace assembly comprises a front embedded part 7 embedded in the top of the front crown beam 3, a rear embedded part 8 embedded in the front crown beam 3 close to the side of the front crown beam 3, an H-shaped steel 9 fixedly connected to the front embedded part 7, an adjusting seat 10 fixedly connected to the upper end of the H-shaped steel 9, and a support frame 12 whose lower end abuts against the adjusting seat 10 and whose upper end is rotatably connected to a mounting seat 11; the mounting seat 11 is fixedly connected to the rear embedded part 8.

[0027] As a further improved technical solution of this embodiment, the upper wing plate of the H-shaped steel 9 is provided with a strip hole 13; the adjustment seat 10 includes a bottom plate 14 located at the upper end of the H-shaped steel 9 and fixedly connected to the H-shaped steel 9, a limit plate 16 fixedly connected to the bottom plate 14 and having a groove 15, and a reinforcing plate 17 fixedly connected to the limit plate 16 and the bottom plate 14; the bottom plate 14 is provided with a connecting hole 18 corresponding to the strip hole 13, and the connecting hole 18 and the strip hole 13 are connected by a bolt 19. In this embodiment, the groove 15 is preferably arc-shaped, and other applicable shapes can obviously be used. When in use, by adjusting the position of the adjustment seat 10 on the H-shaped steel 9, the inclination of the support frame 12 can be adjusted, thereby ensuring that the support frame 12 can be effectively supported. The implementation error between the front crown beam 3 and the rear crown beam 4 during the construction process can be applied, and the diagonal brace assembly is easy to disassemble and assemble and can be reused repeatedly.

[0028] In this embodiment, the mounting base 11 includes a base plate 20 fixedly connected to the rear embedded part 8, and a connecting head 21 fixedly connected to the base plate 20 and rotatably connected to the support frame 12. The connecting head 21 can be rotatably connected to the support frame 12 after being assembled, or it can be connected by other rotating connecting parts.

[0029] As a preferred technical solution of this embodiment, the support frame 12 includes an upper rod 22 rotatably connected to the mounting seat 11, a lower rod 23 abutting against the adjustment seat 10, two parallel oblique rods 24 whose ends are respectively fixed to the upper rod 22 and the lower rod 23, and a plurality of evenly distributed short rods 25 respectively fixed to the two oblique rods 24. The support frame 12 of this structure has the characteristics of light weight while meeting the support strength, and is easy to carry during disassembly and assembly. The short rods 25 can form a ladder, which can be used as a passage for personnel to go up and down during operation by adding hand guards or other protective measures.

[0030] The height difference between the tops of the front row piles 1 and the rear row piles 2 of the utility model is preferably 3-5m, which not only ensures the safety and reliability during the foundation pit excavation process, but also reduces the construction time and cost while ensuring the quality of the project.

[0031] The utility model adopts a diagonal brace assembly, which significantly enhances the upper bearing capacity of the front row piles 1. This improvement enables the support system to fully meet the construction support requirements of deep foundation pits. The introduction of the diagonal brace assembly not only improves the stability of the overall structure, but also allows a larger height difference to be formed between the front row piles 1 and the rear row piles 2, thereby providing a more flexible and efficient solution for different geological conditions and complex construction environments.

[0032] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A pile support structure for a deep foundation pit, comprising a front row of piles (1), a rear row of piles (2) with tops higher than the front row of piles (1), a front crown beam (3) arranged on the tops of the front row of piles (1), a rear crown beam (4) arranged on the tops of the rear row of piles (2), a surrounding purlin (5) arranged on the rear row of piles (2) and having the same height as the front crown beam (3), and a connecting beam (6) having two ends respectively fixedly connected to the front crown beam (3) and the surrounding purlin (5); characterized in that: The invention also comprises an oblique brace assembly whose two ends are respectively fixedly connected to the front crown beam (3) and the rear crown beam (4); the oblique brace assembly comprises a front embedded part (7) embedded in the top of the front crown beam (3), a rear embedded part (8) embedded in the front crown beam (3) close to the side of the front crown beam (3), an H-shaped steel (9) fixedly connected to the front embedded part (7), an adjustment seat (10) fixedly connected to the upper end of the H-shaped steel (9), and a support frame (12) whose lower end is abutted against the adjustment seat (10) and whose upper end is rotatably connected to a mounting seat (11); the mounting seat (11) is fixedly connected to the rear embedded part (8).

2. The pile support structure for a deep foundation pit according to claim 1, characterized in that: The upper wing plate of the H-shaped steel (9) is provided with a strip hole (13); the adjustment seat (10) comprises a bottom plate (14) located at the upper end of the H-shaped steel (9) and fixedly connected to the H-shaped steel (9), a limit plate (16) fixedly connected to the bottom plate (14) and having a groove (15), and a reinforcing plate (17) fixedly connected to the limit plate (16) and the bottom plate (14); a connecting hole (18) corresponding to the strip hole (13) is provided on the bottom plate (14), and the connecting hole (18) and the strip hole (13) are connected by a bolt (19).

3. The pile support structure for a deep foundation pit according to claim 2, characterized in that: The groove (15) is arc-shaped.

4. The pile support structure for a deep foundation pit according to claim 1, characterized in that: The mounting seat (11) comprises a base plate (20) fixedly connected to the rear embedded component (8), and a connector (21) fixedly connected to the base plate (20) and rotatably connected to the support frame (12).

5. The pile support structure for a deep foundation pit according to claim 1, characterized in that: The support frame (12) comprises an upper rod (22) rotatably connected to the mounting seat (11), a lower rod (23) abutting against the adjustment seat (10), two parallel oblique rods (24) whose two ends are respectively fixedly connected to the upper rod (22) and the lower rod (23), and a plurality of evenly distributed short rods (25) respectively fixedly connected to the two oblique rods (24).

6. The pile support structure for a deep foundation pit according to claim 1, characterized in that: The height difference between the tops of the front row piles (1) and the rear row piles (2) is 3-5m.

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