Servo supporting device for circular foundation pit

Abstract

The utility model provides a servo supporting device for a circular foundation pit, which comprises a plurality of arc supporting beams which are arc section profile steel and form a supporting circular ring, and the supporting circular ring is positioned on the inner side of a circular diaphragm wall; the multiple hydraulic connector boxes are correspondingly arranged at the joints of the adjacent arc supporting beams, and each hydraulic connector box is correspondingly connected with the arc supporting beams on the two sides; the gap liner layer is arranged between the supporting circular ring and the circular diaphragm wall; and the hydraulic pump station is connected with the hydraulic joint box. The servo supporting device for the circular foundation pit can provide stable and reliable support for the circular foundation pit, and has the advantages of being short in construction period, easy to disassemble and the like.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit engineering technology, and in particular to a servo support device for circular foundation pits. Background Technology

[0002] Currently, in foundation pit engineering, especially in the construction of circular foundation pits, the support system is a crucial component in ensuring the stability of the pit. Traditional support methods often employ reinforced concrete inner ring beams or inner lining walls, but these methods present several inconveniences during construction. First, the construction period for reinforced concrete supports is long, requiring waiting for the concrete to reach its design strength before proceeding to the next stage of construction, which undoubtedly increases the construction time. Second, reinforced concrete supports are often difficult to dismantle after the foundation pit bottom slab is poured, posing challenges to subsequent structural reconstruction. Furthermore, traditional support methods cannot adjust the support force in a timely manner according to the actual deformation of the foundation pit, potentially affecting its stability. Utility Model Content

[0003] In order to solve the above problems, the present invention aims to provide a servo support device for circular foundation pits.

[0004] To achieve the above objectives, this utility model provides a servo support device for a circular foundation pit, comprising: an arc-shaped support beam, which is an arc-shaped steel section, with multiple arc-shaped support beams forming a support ring, the support ring being located on the inner side of a circular diaphragm wall; multiple hydraulic joint boxes, with corresponding connection points for adjacent arc-shaped support beams, each hydraulic joint box correspondingly connecting to the arc-shaped support beams on both sides; a gap liner layer, disposed between the support ring and the circular diaphragm wall; and a hydraulic pump station, connected to the hydraulic joint boxes.

[0005] Furthermore, the servo support device for circular foundation pits provided by this utility model also has the following features: the hydraulic connector box includes a box shell, and a bidirectional hydraulic cylinder is provided inside the box shell. The bidirectional hydraulic cylinder has two piston rods in opposite directions, and the ends of the two piston rods are fixed with top plates. The two top plates are respectively connected and fixed to the arc support beams on both sides by bolts.

[0006] Furthermore, the servo support device for circular foundation pits provided by this utility model also has the following characteristics: the shell is a steel plate shell structure, the shell is an arc-shaped cavity, and the cross-sectional shape of the shell is rectangular.

[0007] Furthermore, the servo support device for circular foundation pits provided by this utility model also has the following characteristics: there are four hydraulic joint boxes, which are arranged in a ring array.

[0008] Furthermore, the servo support device for circular foundation pits provided by this utility model also has the following features: the hydraulic pump station and the bidirectional hydraulic cylinder are connected by a communication cable and hydraulic pipelines.

[0009] Furthermore, the servo support device for circular foundation pits provided by this utility model also has the following characteristics: the gap padding layer is a cork layer or a rubber layer.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. In the servo support device for circular foundation pits of this utility model, the arc support beam and the joint box form a socket connection to form a support ring, which can adapt to the characteristics of circular ground diaphragm walls, achieve uniform support, and improve the support effect.

[0012] 2. In the servo support device for circular foundation pits of this utility model, the setting of the gap pad layer not only ensures the tight fit between the support ring and the circular ground wall, but also generates radial thrust on the circular ground wall when the diameter of the support ring increases, and enables the support ring to function stably through the strong friction between it and the circular ground wall.

[0013] 3. In the servo support device for circular foundation pits of this utility model, the extension and retraction of the hydraulic cylinder is controlled by a hydraulic pump station, which has a high degree of automation and reduces manual operation.

[0014] 4. The servo support device for circular foundation pits of this utility model can replace the traditional support forms such as reinforced concrete inner ring beam support or inner lining wall. The support ring has a large internal clearance, which can provide a larger working surface than traditional bracing and corner bracing, making it easier for excavation and backfilling in the circular foundation pit.

[0015] 5. The servo support device for circular foundation pits of this utility model is easy and quick to install and disassemble. It can be quickly assembled and disassembled according to project needs, reducing construction difficulty and cost, and improving construction efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the servo support device for a circular foundation pit in an embodiment of this utility model.

[0017] Figure 2 This is a schematic diagram of the connection between the hydraulic joint box and the arc support beam in an embodiment of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the hydraulic connector box shell in an embodiment of this utility model;

[0019] Figure 4This is a schematic diagram of the support principle of the servo support device for a circular foundation pit in an embodiment of this utility model. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easy to understand, the following embodiments, in conjunction with the accompanying drawings, will specifically illustrate the technical solution of this utility model.

[0021] See Figure 1 This embodiment provides a servo support device for a circular foundation pit. The device includes: an arc support beam 4, a hydraulic joint box 2, a gap liner layer 3, and a hydraulic pump station 7.

[0022] The circular arc support beam 4 is a segment of steel with a circular arc shape. Multiple circular arc support beams 4 form a support ring. The support ring is located inside the circular diaphragm wall 1. The support ring is the main load-bearing structure, and the steel material ensures that it has sufficient strength and rigidity to withstand the load generated by the excavation of the circular foundation pit. The diameter of the support ring is customized according to the diameter of the circular foundation pit to ensure that the support ring fits tightly with the circular diaphragm wall and achieves uniform support.

[0023] Multiple hydraulic joint boxes 2 are provided, corresponding to the connection points of adjacent arc-shaped support beams 4. Each hydraulic joint box 2 connects to the arc-shaped support beams 4 on both sides. See also Figure 1 Preferably, there are four hydraulic connector boxes 2, arranged in a ring array.

[0024] See Figure 2 The hydraulic connector box 2 includes a housing 21, within which a bidirectional hydraulic cylinder 22 is installed. The housing 21 is a steel plate shell structure. See also... Figure 3 The housing 21 is an overall arc-shaped cavity, and its cross-sectional shape (as shown in Figure S) is rectangular. Through slots are provided on both the left and right sides of the housing 21 for the arc-shaped support beams 4 to pass through. The bidirectional hydraulic cylinder 22 has two piston rods pointing in opposite directions, and each piston rod has a top plate 23 fixed to its end. The two top plates 23 are respectively connected and fixed to the arc-shaped support beams 4 on both sides by bolts 24.

[0025] The arc-shaped support beam 4 and the hydraulic joint box 2 form a socket-type connection. (See also...) Figure 4 When the piston rod of the bidirectional hydraulic cylinder 22 pushes or retracts, it causes the arc-shaped support beam 4 to move along an arc-shaped trajectory, ensuring that the outline of the support ring is always constrained to be circular. When the piston rod of the bidirectional hydraulic cylinder 22 pushes and extends, the outline of the support ring is as follows: Figure 4 As shown in Figure a; when the piston rod of the bidirectional hydraulic cylinder 22 retracts, the contour of the support ring is as follows. Figure 4 As shown in Figure b, the radius of the support ring in the stretched state is R1, and the radius of the support ring in the contracted state is R2. The difference between R1 and R2 is d.

[0026] A gap liner 3 is disposed between the supporting ring and the circular diaphragm wall 1. The gap liner 3 is a cork layer or a rubber layer. The gap liner 3 is used to ensure the effective transmission of the supporting force and increase the friction with the diaphragm wall. It has the characteristics of high elastic modulus and high wear resistance, so that the supporting ring can resist its own weight by friction with the diaphragm wall alone.

[0027] See Figure 1 The hydraulic pump station 7 is connected to the bidirectional hydraulic cylinder 22 in the hydraulic connector box 2 via communication cable 5 and hydraulic pipeline 6. Communication cable 5 includes multiple communication lines connecting adjacent hydraulic connector boxes 2 and a single communication bus connecting the hydraulic connector box 2 and the hydraulic pump station 7. Four hydraulic pipelines 6 connect the hydraulic pump station 7 to the four hydraulic connector boxes 2. The hydraulic pump station 7 is connected to an external power source. The hydraulic pump station 7 is equipped with an integrated control box for regulating the operation of the bidirectional hydraulic cylinder 22. By adjusting the extension and retraction of the hydraulic cylinder piston rod, the support ring can be adjusted to meet the stability requirements of the circular foundation pit.

[0028] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A servo support device for a circular foundation pit, characterized in that, include: The circular arc support beam is a segment of steel with a circular arc shape. Multiple circular arc support beams form a support ring, which is located inside the circular diaphragm wall. Multiple hydraulic joint boxes are provided, with corresponding connection points for adjacent arc support beams. Each hydraulic joint box is connected to the arc support beams on both sides. A gap liner is provided between the supporting ring and the circular grounding wall; A hydraulic pump station is connected to the hydraulic connector box.

2. The servo support device for a circular foundation pit as described in claim 1, characterized in that: in, The hydraulic connector box includes a housing, inside which a bidirectional hydraulic cylinder is installed. The bidirectional hydraulic cylinder has two piston rods in opposite directions, and the ends of the two piston rods are fixed with top plates. The two top plates are respectively connected and fixed to the arc support beams on both sides by bolts.

3. The servo support device for a circular foundation pit as described in claim 2, characterized in that: in, The shell is a steel plate shell structure, the shell is an arc-shaped cavity, and the cross-sectional shape of the shell is rectangular.

4. The servo support device for a circular foundation pit as described in any one of claims 1 to 3, characterized in that: in, There are four hydraulic connector boxes, arranged in a circular array. The circular arc support beam consists of four sections, each with the same structure and dimensions.

5. The servo support device for a circular foundation pit as described in claim 2, characterized in that: in, The hydraulic pump station and the bidirectional hydraulic cylinder are connected via communication cables and hydraulic pipelines.

6. The servo support device for a circular foundation pit as described in claim 1, characterized in that: in, The gap liner is a cork layer or a rubber layer.

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