A narrow space deep foundation pit supporting and bracing mechanism

Abstract

The utility model discloses a kind of narrow space deep foundation pit support supporting mechanisms, including adjustable length support sleeve, the outside of adjustable length support sleeve is fixedly connected with splicing flange, the inside of splicing flange is fixedly connected with flange connecting bolt, the upper portion of adjustable length support sleeve is fixedly connected with telescopic ball hinge support, the upper portion of telescopic ball hinge support is provided with spherical hinge joint, the upper portion of spherical hinge joint is provided with disc spring group, the lower portion of adjustable length support sleeve is fixedly connected with anchoring force transmission plate, the lower portion of anchoring force transmission plate is fixedly connected with anchoring bottom plate, the four corners of anchoring bottom plate are bolted with anchor bolt, the bottom of anchoring bottom plate is provided with friction gasket, city core area deep foundation pit is often limited by narrow site, surrounding building dense, high underground water level, traditional support, such as underground continuous wall or profile steel support, needs large-scale machinery and is not adjustable.

Description

Technical Field

[0001] This utility model relates to the field of deep foundation pit support technology in confined spaces, specifically a support mechanism for deep foundation pits in confined spaces. Background Technology

[0002] Deep foundation pits in urban core areas are often constrained by narrow sites, dense surrounding buildings, and high groundwater levels. Traditional support methods, such as diaphragm walls or steel supports, require large machinery and are not adjustable, making them difficult to adapt to irregular and narrow spaces. They also have long construction cycles, low reusability, and are difficult to control deformation. Therefore, there is an urgent need for a lightweight support structure that is adjustable in length, quick to assemble, self-adaptive to rotation, and reusable, in order to meet the needs of safe, efficient, and economical support in complex environments.

[0003] Compared with existing technologies, current deep foundation pit support products on the market have several shortcomings, including: length that is not adjustable or has a limited adjustment range, requiring on-site cutting and welding in confined spaces, resulting in low efficiency and significant hidden dangers; rigid connection ends that cannot adapt to uneven foundation pit walls and subsequent deformation, leading to stress concentration and instability; lack of disc spring-type elastic buffer devices, making them prone to failure under vibration and impact; anchoring relying solely on a single bolt without the cooperation of force transmission plates and friction pads, resulting in a high risk of slippage and settlement in soft soil and high water table strata; poor modularity of the overall welded structure, making disassembly, assembly, and transportation difficult, hindering machinery access in confined spaces, resulting in low reusability; and large size and weak spatial adaptability of flanges and hinged components. Utility Model Content

[0004] The purpose of this utility model is to provide a support mechanism for deep foundation pits in confined spaces, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a support mechanism for deep foundation pits in confined spaces, comprising an adjustable-length support sleeve, wherein the exterior of the adjustable-length support sleeve is fixedly connected to a splicing flange, the interior of the splicing flange is fixedly connected to a flange connecting bolt, the upper part of the adjustable-length support sleeve is fixedly connected to a telescopic ball joint support, the upper part of the telescopic ball joint support is provided with a spherical hinge joint, the upper part of the spherical hinge joint is provided with a disc spring assembly, the lower part of the adjustable-length support sleeve is fixedly connected to an anchoring force transmission plate, the lower part of the anchoring force transmission plate is fixedly connected to an anchoring base plate, the four corners of the anchoring base plate are bolted with anchor bolts, and the bottom of the anchoring base plate is provided with friction pads.

[0006] As a further embodiment of this utility model: the upper part of the telescopic ball joint support is fixedly connected to a spherical hinge joint.

[0007] As a further embodiment of this utility model, a disc spring assembly is fixedly connected to the upper part of the spherical hinge joint.

[0008] As a further embodiment of this utility model: a telescopic ball joint support is fixedly connected to the upper part of the disc spring assembly.

[0009] As a further embodiment of this utility model, the upper part of the telescopic ball joint support is fixedly connected with an anchoring force transmission plate.

[0010] As a further embodiment of this utility model: the upper part of the anchoring force transmission plate is fixedly connected to an anchoring base plate.

[0011] As a further embodiment of this utility model, a friction pad is provided on the upper part of the anchoring base plate.

[0012] Compared with existing technologies, the advantages of this utility model are as follows: The adjustable-length support sleeve, combined with the splicing flange, allows for rapid adjustment of the support length according to the actual dimensions of the pit in a confined space, adapting to the support needs of pits of different depths and widths, significantly improving construction flexibility and efficiency. The hinged structure of the telescopic ball joint support and the spherical hinge joint automatically adapts to minor deformations and uneven surfaces of the pit wall, enhancing the stability and safety of the support system. The elastic buffering effect of the disc spring assembly absorbs the impact energy caused by pit deformation or external loads, preventing the support structure from failing due to sudden displacement or vibration, thus extending its service life. The rigid connection between the anchoring force transmission plate and the anchoring base plate, along with the anchor bolts and friction pads, significantly enhances the anchoring strength between the support mechanism and the foundation, preventing slippage or settlement. It is particularly suitable for deep pit support in soft soil layers or high water levels. The modular splicing structure allows for quick disassembly and reuse of components, reducing material waste and construction costs, making it especially suitable for operations in confined spaces where machinery is difficult to access. Attached Figure Description

[0013] Figure 1 A three-dimensional perspective view of the support mechanism for deep foundation pits in confined spaces is provided for this utility model. Figure 2 A top view of the support mechanism for deep foundation pits in confined spaces proposed in this utility model; Figure 3 A front view of the support mechanism for deep foundation pits in confined spaces proposed in this utility model; Figure 4 A side view of the support mechanism for deep foundation pits in confined spaces proposed in this utility model; In the diagram: 1. Adjustable length support sleeve; 2. Flange connecting bolts; 3. Spherical hinge joint; 4. Disc spring assembly; 5. Telescopic spherical hinge support; 6. Anchoring force transmission plate; 7. Anchoring base plate; 8. Splicing flange; 9. Friction gasket; 10. Anchor bolts. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-4 In this embodiment of the utility model, a support mechanism for deep foundation pits in confined spaces includes an adjustable length support sleeve 1. All external parts of the adjustable length support sleeve 1 are fixedly connected to splicing flanges 8. Flange connecting bolts 2 are fixedly connected internally to the splicing flanges 8. A telescopic ball joint support 5 is fixedly connected to the upper part of the adjustable length support sleeve 1. A spherical hinge joint 3 is provided on the upper part of the telescopic ball joint support 5. A disc spring assembly 4 is provided on the upper part of the spherical hinge joint 3. An anchoring force transmission plate 6 is fixedly connected to the lower part of the adjustable length support sleeve 1. An anchoring base plate 7 is fixedly connected to the lower part of the anchoring force transmission plate 6. Anchor bolts 10 are bolted to the four corners of the anchoring base plate 7. Friction pads 9 are provided at the bottom of the anchoring base plate 7.

[0016] Preferably, the telescopic ball joint support 5 and the spherical hinge joint 3 cooperate to allow the support end to rotate slightly in multiple directions, conform to the uneven pit wall, and reduce the additional bending moment. The disc spring group 4 absorbs the impact, prevents instability and extends service life. The series ball joint-spring-ball joint system also has an adaptive reset function. The anchoring force transmission plate 6 expands the force-bearing surface, distributes the load evenly, and avoids local crushing. The anchoring base plate 7 is rigidly combined with the force transmission plate, which facilitates quick positioning and installation. The friction pad 9 has high friction to engage the base, improves anti-slip, and is safe even in soft soil and high water levels.

[0017] The working principle of this utility model is as follows: When in use, the adjustable length support sleeve 1 is first quickly assembled and locked in length according to the actual net distance of the pit through the splicing flange 8 and flange connecting bolts 2. Then, the anchoring base plate 7 together with the friction pad 9 is attached to the bottom of the pit or the surface of the retaining structure. The anchor bolts 10 are tightened through the four corner holes to form an anti-slip anchoring. The anchoring force transmission plate 6 on the upper part of the anchoring base plate 7 evenly diffuses the support axial force to the foundation to prevent local crushing. The telescopic ball joint support 5 at the upper end of the adjustable length support sleeve 1 realizes multi-directional micro-rotation through the ball joint 3, automatically fitting the uneven pit wall. The disc spring group 4 elastically expands and contracts when subjected to impact or temperature deformation, maintaining the pre-tightening force and absorbing energy to avoid support instability. The entire mechanism can be manually installed, adjusted and disassembled in a narrow space and can be reused.

[0018] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A support mechanism for deep foundation pits in confined spaces, comprising an adjustable-length support sleeve (1), characterized in that: The adjustable length support sleeve (1) is fixedly connected to the outside of the splicing flange (8), and the inside of the splicing flange (8) is fixedly connected to the flange connecting bolt (2). The upper part of the adjustable length support sleeve (1) is fixedly connected to the telescopic ball joint support (5), the upper part of the telescopic ball joint support (5) is provided with a ball joint (3), the upper part of the ball joint (3) is provided with a disc spring assembly (4), the lower part of the adjustable length support sleeve (1) is fixedly connected to the anchoring force transmission plate (6), the lower part of the anchoring force transmission plate (6) is fixedly connected to the anchoring base plate (7), the four corners of the anchoring base plate (7) are bolted with anchor bolts (10), and the bottom of the anchoring base plate (7) is provided with friction pads (9).

2. The support mechanism for deep foundation pits in confined spaces according to claim 1, characterized in that: The upper part of the telescopic ball joint support (5) is fixedly connected to a ball joint (3).

3. The support mechanism for deep foundation pits in confined spaces according to claim 2, characterized in that: The upper part of the spherical hinge joint (3) is fixedly connected to a disc spring assembly (4).

4. The support mechanism for deep foundation pits in confined spaces according to claim 3, characterized in that: The upper part of the disc spring assembly (4) is fixedly connected to a telescopic ball joint support (5).

5. The support mechanism for deep foundation pits in confined spaces according to claim 4, characterized in that: An anchor plate (6) is fixedly connected to the upper part of the telescopic ball joint support (5).

6. The support mechanism for deep foundation pits in confined spaces according to claim 5, characterized in that: An anchoring base plate (7) is fixedly connected to the upper part of the anchoring force transmission plate (6).

7. The support mechanism for deep foundation pits in confined spaces according to claim 6, characterized in that: The upper part of the anchoring base plate (7) is provided with friction pads (9).

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