Deep foundation pit supporting structure

Abstract

The utility model belongs to the technical field of deep foundation pit supporting, and particularly relates to a deep foundation pit supporting structure which comprises a soil retaining plate and a supporting plate, an inclined inserting hole is formed in the soil retaining plate, a side wall anchor is arranged in the inclined inserting hole in a penetrating mode, and an anchor rod base matched with the side wall anchor is arranged at the position, located at the inclined inserting hole, of the soil retaining plate. A plurality of first grouting grooves which are communicated with one another are formed in the contact surfaces of the breast boards and the side wall of the deep foundation pit and located at the inclined insertion holes; the supporting plate is located at the bottom of the soil retaining plate, pile-in-row holes are formed in the supporting plate, mounting seats are arranged at the positions, located at the pile-in-row holes, of the top of the supporting plate, foundation piles penetrate through the mounting seats, the inner diameter of the mounting seats is smaller than that of the pile-in-row holes, the foundation piles are inserted into the bottom of the deep foundation pit through the pile-in-row holes, and first grouting holes are formed in the mounting seats.

Description

Technical Field

[0001] The utility model belongs to the technical field of deep foundation pit support, and in particular relates to a deep foundation pit support structure. Background Art

[0002] Deep foundation pit support is a series of side wall support, reinforcement and protection measures taken to ensure the safety of underground structure construction and protect the surrounding environment.

[0003] For non-soft soil foundation pits with low pit depth, single-row piles are usually used for support. However, the single-row pile method has limited restraining effect on the soil. It is easy to undergo large displacement when subjected to soil pressure. The overall structural strength is poor. Due to its structural limitations, the connection strength with the side wall of the foundation pit is also low. Utility Model Content

[0004] Based on the problems mentioned in the above background technology, the utility model provides a deep foundation pit supporting structure.

[0005] The technical solution adopted by the utility model is as follows: a deep foundation pit supporting structure, comprising a retaining plate and a supporting plate, wherein an oblique insertion hole is provided on the retaining plate, a side wall anchor is inserted into the oblique insertion hole, an anchor rod seat matching the side wall anchor is arranged at the oblique insertion hole on the retaining plate, a contact surface between the retaining plate and the side wall of the deep foundation pit is provided at the oblique insertion hole, and a plurality of first grouting grooves interconnected are provided; the supporting plate is located at the bottom of the retaining plate, a pile row hole is provided on the support plate, a mounting seat is provided at the top of the support plate at the pile row hole, foundation piles are inserted into the mounting seat, the inner diameter of the mounting seat is smaller than the pile row hole, the foundation piles are inserted into the bottom of the deep foundation pit through the pile row hole, and the mounting seat is provided with a first grouting hole.

[0006] Furthermore, the side wall anchor includes an integrally formed grouting section and an anchoring section, a second grouting hole is opened at the top of the grouting section, a third grouting hole connected to the second grouting hole is opened on the circumference of the grouting section, and a grouting cavity connected to the third grouting hole is opened inside the anchor seat.

[0007] Furthermore, the anchoring section is provided with threads on its circumference.

[0008] Furthermore, the bottom of the anchoring section is conical.

[0009] Furthermore, a plurality of second grouting grooves communicating with the pile row holes are provided at the bottom of the support plate.

[0010] Furthermore, positioning ribs are provided on both sides of the anchor rod seat.

[0011] Furthermore, a plurality of triangular reinforcing ribs are arranged on the support plate, and two straight sides of the triangular reinforcing ribs abut against the surface of the support plate and the surface of the retaining plate respectively.

[0012] Beneficial effects of the utility model:

[0013] 1. Connect the retaining plate with the side wall of the deep foundation pit, insert the side wall anchor to install the anchor seat, and realize the retaining plate's blocking effect on the side wall of the deep foundation pit; at the same time, a support plate is arranged at the bottom of the retaining plate, and the support plate is connected to the bottom of the deep foundation pit by means of pile rows and foundation piles, wherein the inner diameter of the mounting seat matches the foundation pile, the inner diameter of the mounting seat is smaller than the pile row hole, and a first grouting hole is opened on the mounting seat, which is convenient for grouting into the pile row hole and the drilled hole. At this time, the grouting filled in the pile row hole makes the connection strength between the support plate and the foundation pit higher; secondly, the foundation piles and the support plate enhance the connection strength between the retaining plate and the side wall of the foundation pit, so that the support effect is better and the structural strength is higher.

[0014] 2. The setting of triangular reinforcement ribs improves the structural strength of the support plate and the retaining plate, and further shares the force of the deep foundation pit side wall on the retaining plate through the triangular reinforcement ribs to the support plate and the base column for joint support. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0016] Figure 1 This is a schematic diagram of the connection between the utility model and the deep foundation pit;

[0017] Figure 2 It is a schematic diagram of the utility model;

[0018] Figure 3 This is a schematic diagram of the connection surface between the earth retaining plate of the utility model and the side wall of the deep foundation pit;

[0019] Figure 4 This is a schematic diagram of the cross-sectional connection between the side wall anchor and the anchor rod seat of the utility model;

[0020] Figure 5 This is a schematic diagram of the support plate of the utility model;

[0021] Figure 6 This is a schematic diagram of the bottom surface of the support plate of the utility model;

[0022] The attached drawings are marked as follows:

[0023] Retaining plate 1, inclined insertion hole 11, first grouting groove 12, side wall anchor 2, grouting section 21, second grouting hole 211, third grouting hole 212, anchoring section 22, thread 221, anchor seat 3, grouting cavity 31, positioning rib 32, support plate 4, pile hole 41, foundation pile 42, mounting seat 43, first grouting hole 44, second grouting groove 45, triangular reinforcing rib 46. DETAILED DESCRIPTION

[0024] like Figure 1 to Figure 6As shown, a deep foundation pit supporting structure comprises a retaining plate 1 and a supporting plate 4, wherein the retaining plate 1 is provided with an oblique insertion hole 11, in which a side wall anchor 2 is inserted, and an anchor rod seat 3 matching the side wall anchor 2 is arranged at the oblique insertion hole 11 on the retaining plate 1, and a plurality of first grouting grooves 12 interconnected are arranged at the oblique insertion hole 11 on the contact surface between the retaining plate 1 and the side wall of the deep foundation pit; the supporting plate 4 is located at the bottom of the retaining plate 1, and a pile hole 41 is provided on the supporting plate 4, and a mounting seat 43 is arranged at the top of the supporting plate 4 at the pile hole 41, in which a foundation pile 42 is inserted, and the inner diameter of the mounting seat 43 is smaller than that of the pile hole 41, and the foundation pile 42 is inserted into the bottom of the deep foundation pit through the pile hole 41, and a first grouting hole 44 is arranged on the mounting seat 43.

[0025] By adopting the above technical solution, after drilling and grouting the side wall and the bottom of the deep foundation pit, the retaining plate 1 is connected to the side wall of the deep foundation pit, and the side wall anchor 2 is inserted to install the anchor rod seat 3, so as to achieve the blocking effect of the retaining plate 1 on the side wall of the deep foundation pit and ensure the support effect;

[0026] At the same time, a support plate 4 is arranged at the bottom of the retaining plate 1, and the support plate 4 is connected to the bottom of the deep foundation pit by means of pile rows and foundation piles 42, wherein the inner diameter of the mounting seat 43 matches the foundation pile 42, the inner diameter of the mounting seat 43 is smaller than the pile row hole 41, and a first grouting hole 44 is opened on the mounting seat 43, so as to facilitate grouting into the pile row hole 41 and the drilled hole. At this time, the grouting filled in the pile row hole 41 makes the connection strength between the support plate 4 and the foundation pit higher;

[0027] Secondly, the foundation piles 42 and the support plate 4 further enhance the connection strength between the retaining plate 1 and the side wall of the foundation pit, so that the supporting effect is better and the structural strength is higher.

[0028] As a preferred solution, the side wall anchor 2 includes an integrally formed grouting section 21 and an anchoring section 22, a second grouting hole 211 is provided at the top of the grouting section 21, a third grouting hole 212 connected to the second grouting hole 211 is provided around the grouting section 21, and a grouting cavity 31 connected to the third grouting hole 212 is provided inside the anchor rod seat 3. Grouting is performed through the grouting section 21 to ensure that the anchor rod seat 3, the side wall anchor 2 and the retaining plate 1 are tightly connected, thereby ensuring the stability of the overall structure.

[0029] As a preferred solution, a thread 221 is provided on the periphery of the anchoring section 22. The provision of the thread 221 makes the anchoring section 22 and the grouting connection at the drilling hole on the side wall of the deep foundation pit more tightly, ensuring that the overall connection is more stable.

[0030] As a preferred solution, the bottom of the anchoring section 22 is conical. The conical bottom is convenient for insertion.

[0031] As a preferred solution, a plurality of second grouting grooves 45 connected to the pile holes 41 are provided at the bottom of the support plate 4. When grouting concrete, excess concrete is allowed to overflow into the second grouting grooves 45, ensuring that the bottom of the support plate 4 is more tightly combined with the bottom of the deep foundation pit.

[0032] As a preferred solution, positioning ribs 32 are provided on both sides of the anchor rod seat 3. The positioning ribs 32 facilitate the installation of the anchor rod seat 3, and the positioning ribs 32 also play an effect of strengthening the connection structure.

[0033] As a preferred solution, the support plate 4 is provided with a plurality of triangular reinforcing ribs 46, and the two straight sides of the triangular reinforcing ribs 46 respectively abut against the surface of the support plate 4 and the surface of the retaining plate 1. The provision of the triangular reinforcing ribs 46 improves the structural strength of the support plate 4 and the retaining plate 1, and further shares the force of the deep foundation pit side wall on the retaining plate 1 through the triangular reinforcing ribs 46 to the support plate 4 and the foundation column for joint support.

[0034] The utility model is described in detail above. The description of the specific embodiments is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A deep foundation pit support structure, characterized in that: include A retaining plate (1), wherein an oblique insertion hole (11) is provided on the retaining plate (1), a side wall anchor (2) is inserted into the oblique insertion hole (11), an anchor rod seat (3) matching the side wall anchor (2) is provided on the retaining plate (1) at the oblique insertion hole (11), and a plurality of first grouting grooves (12) connected to each other are provided at the oblique insertion hole (11) on the contact surface between the retaining plate (1) and the side wall of the deep foundation pit; A support plate (4), the support plate (4) being located at the bottom of the retaining plate (1), the support plate (4) being provided with a pile row hole (41), a mounting seat (43) being provided at the top of the support plate (4) at the pile row hole (41), a foundation pile (42) being inserted into the mounting seat (43), the inner diameter of the mounting seat being smaller than the pile row hole (41), the foundation pile (42) being inserted into the bottom of the deep foundation pit through the pile row hole (41), and a first grouting hole (44) being provided on the mounting seat (43).

2. A deep foundation pit support structure according to claim 1, characterized in that: The side wall anchor (2) comprises an integrally formed grouting section (21) and an anchoring section (22); a second grouting hole (211) is provided at the top of the grouting section (21); a third grouting hole (212) connected to the second grouting hole (211) is provided on the periphery of the grouting section (21); and a grouting cavity (31) connected to the third grouting hole (212) is provided inside the anchor rod seat (3).

3. A deep foundation pit support structure according to claim 2, characterized in that: The anchoring section (22) is provided with a thread (221) on its circumference.

4. A deep foundation pit support structure according to claim 3, characterized in that: The bottom of the anchoring section (22) is conical.

5. A deep foundation pit support structure according to claim 1, characterized in that: The bottom of the support plate (4) is provided with a plurality of second grouting grooves (45) which are in communication with the pile row holes (41).

6. A deep foundation pit support structure according to claim 1, characterized in that: Positioning ribs (32) are provided on both sides of the anchor rod seat (3).

7. A deep foundation pit support structure according to claim 1, characterized in that: A plurality of triangular reinforcing ribs (46) are arranged on the support plate (4), and two straight sides of the triangular reinforcing ribs (46) respectively abut against the surface of the support plate (4) and the surface of the retaining plate (1).

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