Supporting structure for deep foundation pit

Abstract

The invention discloses a supporting structure used for a deep foundation pit, and relates to the technical field of deep foundation pit supporting, the supporting structure comprises a supporting unit used for foundation pit supporting, an auxiliary unit used for enhancing the supporting capacity of the supporting unit is arranged in the supporting unit, the supporting unit comprises a base, two sets of symmetrically distributed sliding grooves are formed in the base, and the sliding grooves are arranged in the sliding grooves. Two sets of sliding grooves are formed in the base, grid baffles are connected to the two sets of sliding grooves respectively, each sliding groove comprises two symmetrically-distributed sliding grooves, four mounting holes are evenly distributed in the base, ground anchors used for enhancing the anti-sliding performance of the device are connected into the mounting holes, a bearing is arranged at the center of the base, and the bearing is connected with a bearing through a bolt. By optimizing the sliding adjusting mechanism of the soil retaining plate, the supporting structure can quickly adjust the width of the soil retaining plate, and the height of the soil retaining plate is adjusted in a splicing mode, so that the construction requirements of different foundation pit sizes are met. By means of the structure, foundation pit supporting is more flexible, the complexity of manual adjustment is reduced, and the construction efficiency and accuracy are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of deep foundation pit support, and in particular to a support structure for a deep foundation pit. Background Art

[0002] Foundation pit support structures are widely used in foundation pit excavation, river excavation and other projects to ensure the safety of the construction process and the stability of the foundation pit. In foundation pit construction, the collapse of the side walls of the foundation pit is one of the main factors leading to engineering accidents. Therefore, the design and construction quality of the support structure are directly related to the safety of the project. At present, common foundation pit support structures mostly use materials such as steel structures and concrete structures. Although these traditional structures can provide certain support forces, there are still some problems in practical applications, such as poor adaptability of the support structure, complex installation and adjustment, and insufficient anti-slip ability. Traditional support structures usually require a lot of manpower for installation and adjustment, and under complex geological conditions, the stability of the support system is easily affected, especially in relatively soft or unstable soils, the support structure may face problems such as slippage and displacement.

[0003] In addition, due to the different sizes, depths and shapes of foundation pits, traditional support structures often require a long construction period during the adjustment process, affecting the overall progress of the project. Therefore, how to improve the construction convenience, adaptability and stability of the support structure while meeting the support strength requirements has become a technical problem that needs to be solved urgently in foundation pit support projects. Summary of the invention

[0004] In view of the above technical problems, the present invention discloses a support structure for a deep foundation pit, comprising a support unit for supporting the foundation pit, wherein an auxiliary unit for enhancing the support capacity of the support unit is arranged in the support unit;

[0005] The support unit comprises a base, the base is provided with two groups of symmetrically distributed long grooves, the two groups of the long grooves are respectively connected with baffle plates, the long grooves include two symmetrically distributed sliding grooves, the base is evenly provided with four mounting holes, the mounting holes are connected with ground anchors for enhancing the anti-slip performance of the device, and a bearing is provided at the center of the base;

[0006] The baffle plate includes two earth retaining plates, which are distributed longitudinally. Two T-blocks used in conjunction with sliding grooves are arranged on one end of the earth retaining plate, and two symmetrically distributed T-slots are arranged on the other end of the earth retaining plate. The T-slot of the lower earth retaining plate is connected to the T-block of the upper earth retaining plate, and the T-block on the lower earth retaining plate is connected to the sliding groove. A side fixing pin is rotatably installed on one surface of the earth retaining plate, and a first hinge and two evenly distributed second hinges are installed on the other surface of the earth retaining plate.

[0007] Furthermore, the support unit further includes two symmetrically distributed I-beams, and the I-beams are slidably connected to the T-shaped grooves of the two upper retaining plates.

[0008] Furthermore, a U-shaped groove is provided inside the second hinge.

[0009] Furthermore, a plurality of uniformly distributed limiting grids are provided inside the sliding groove.

[0010] Furthermore, the auxiliary unit includes a central support column, the central support column is connected to a bearing, a central shaft rotating member is connected to the central support column, two symmetrically distributed connecting rods are hinged to the central shaft rotating member, and the two connecting rods are respectively connected to the first hinges on the two retaining plates.

[0011] Furthermore, the auxiliary unit further includes two groups of symmetrically distributed connecting mechanisms. One group of the connecting mechanisms is connected to the lower retaining plate, and the other group of the connecting mechanisms is connected to the upper retaining plate. The connecting mechanism includes four fixing rods, and the four fixing rods correspond to the four second hinges one by one. One end of one group of the fixing rods is connected to the U-shaped groove inside the lower second hinge, one end of the other group of the fixing rods is connected to the U-shaped groove inside the upper second hinge, the other end of one group of the fixing rods is connected to the limiting grid inside the sliding groove, and the other end of the other group of the fixing rods is connected to the I-beam.

[0012] Furthermore, a central shaft cap is fixedly connected to the upper end of the central support column.

[0013] The beneficial effects of the present invention compared with the prior art are as follows:

[0014] (1) By optimizing the sliding adjustment mechanism of the retaining plate, the present invention enables the support structure to quickly adjust the width of the retaining plate and adjust the height of the retaining plate by splicing, so as to meet the construction requirements of different foundation pit sizes. This structure makes the foundation pit support more flexible, reduces the complexity of manual adjustment, and improves the construction efficiency and accuracy.

[0015] (2) The present invention adopts a modular assembly method, and each component is combined by sliding connection, hinged connection or bolt fixation, so that the support structure can be quickly installed and disassembled. The adjustable design of the side fixing pins and fixing rods further improves the construction convenience of the structure, enabling construction workers to quickly adjust the support system according to the on-site situation, reducing the construction difficulty, and improving the engineering adaptability.

[0016] (3) The support structure of the present invention is provided with ground anchor installation holes on the bottom plate and is used in cooperation with ground anchors, which improves the overall anti-slip ability. The combined application of the fixing rods and side fixing pins effectively enhances the anti-lateral displacement ability of the retaining plate, ensuring the stability of the support system in a high-load environment and being applicable to the foundation pit construction under complex geological conditions. Brief Description of the Drawings

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the side structure of the present invention.

[0019] Figure 3 This is a schematic diagram of the top view structure of the present invention.

[0020] Figure 4 This is a schematic diagram of the retaining plate structure in the present invention.

[0021] Figure 5 It is Figure 4 an enlarged schematic diagram of the structure at position A in

[0022] Figure 6 This is a schematic diagram of the base structure in the present invention.

[0023] Figure 7 It is Figure 6 an enlarged schematic diagram of the structure at position B in

[0024] Reference numerals in the drawings: 1 - base; 2 - ground anchor; 3 - fixing rod; 4 - connecting rod; 5 - central rotating member; 6 - I-beam; 7 - side fixing pin; 8 - retaining plate; 9 - central support column; 10 - central shaft cap; 801 - first hinge; 802 - second hinge; 101 - mounting hole; 102 - sliding groove; 103 - bearing. Detailed Description of the Invention

[0025] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0026] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention 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 thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0028] Embodiment: As Figures 1-7 shown, a retaining structure for deep foundation pits includes a support unit for foundation pit support, and an auxiliary unit for enhancing the retaining capacity of the support unit is arranged in the support unit.

[0029] The support unit includes a base 1, two groups of symmetrically distributed long slots are arranged on the base 1, grid baffles are respectively connected to the two groups of long slots. The long slot includes two symmetrically distributed sliding slots 102, and a plurality of uniformly distributed limiting grids are arranged in the sliding slots 102. Four mounting holes 101 are uniformly distributed on the base 1, and ground anchors 2 for enhancing the anti-slip performance of the device are connected in the mounting holes 101. A bearing 103 is arranged at the center position of the base 1. The support unit further includes two symmetrically distributed I-beams 6, and the I-beams 6 are slidably connected to the T-shaped slots of the upper two retaining plates 8. By means of the I-beams 6, the smoothness of the retaining plates 8 during movement is ensured, and tilting or jamming caused by uneven stress is avoided, ensuring the accuracy and safety of the support unit. The anti-deformation ability of the support unit is enhanced by the I-beams 6. Especially when facing large lateral pressure or heavy load, more stable support can be provided.

[0030] The grid baffle includes two retaining plates 8 which are longitudinally distributed. At one end of the retaining plate 8, there are two T-shaped blocks used in cooperation with the sliding groove 102. At the other end of the retaining plate 8, there are two symmetrically distributed T-shaped grooves. The T-shaped groove of the lower retaining plate 8 is connected to the T-shaped block of the upper retaining plate 8, and the T-shaped block on the lower retaining plate 8 is connected to the sliding groove 102, enabling the retaining plate 8 to move along the length direction of the sliding groove 102, so as to adapt to the construction requirements of foundation pits with different widths. On one side of the retaining plate 8, there is a side fixing pin 7 rotatably installed through a connecting hinge. During use, the side fixing pin 7 is inserted into the soil, thereby enhancing the lateral support capacity and improving the stability of the overall structure. When the foundation pit construction is completed or the support state needs to be adjusted, the side fixing pin 7 is rotated and retracted to the side of the retaining plate 8, reducing the space occupation and facilitating construction. There are multiple holes on the side fixing pin 7, and through the multiple holes on the side fixing pin 7, the side fixing pin 7 can adapt to the lateral pressure changes under different working conditions. Especially under high load and complex geological conditions, additional stable support is provided through the side fixing pin 7. On the other side of the retaining plate 8, there is a first hinge 801 and two uniformly distributed second hinges 802, and a U-shaped groove is provided inside the second hinge 802.

[0031] The auxiliary unit includes a central support column 9 which is connected to the bearing 103. Stable vertical support is provided through the central support column 9, and it is ensured that vertical loads can be effectively transmitted during construction. A central shaft rotating part 5 is threadedly connected to the central support column 9. Through the cooperation of the central support column 9 and the central shaft rotating part 5, the support unit has high precision and good stability during adjustment. Two symmetrically distributed connecting rods 4 are hinged to the central shaft rotating part 5, and the two connecting rods 4 are respectively connected to the first hinges 801 on the two retaining plates 8. As the central shaft rotating part 5 moves, the retaining plates 8 on both sides of the base 1 can be adjusted synchronously outward or inward, so as to adapt to the change in the width of the foundation pit. The adjustable characteristic of the connecting rod 4 ensures the smoothness and synchronism of the retaining plate 8 during adjustment, improves the support effect and construction efficiency. Through the connecting rod 4, the retaining plates 8 on both sides of the base 1 have a synchronous characteristic, avoiding the problem of support failure caused by uneven adjustment. The upper end of the central support column 9 is fixedly connected with a central shaft cap 10, and the stroke of the central shaft rotating part 5 is limited through the central shaft cap 10, ensuring that the central shaft rotating part 5 moves within a safe range, thereby avoiding support failure caused by excessive adjustment.

[0032] The auxiliary unit further includes two sets of symmetrically distributed connecting mechanisms. One set of connecting mechanisms is connected to the lower retaining plate 8, and the other set of connecting mechanisms is connected to the upper retaining plate 8. The connecting mechanism includes four fixing rods 3, and the four fixing rods 3 correspond to the four second hinges 802 one by one. One end of one set of fixing rods 3 is connected to the U-shaped groove in the lower second hinge 802, and one end of the other set of fixing rods 3 is connected to the U-shaped groove in the upper second hinge 802. The other end of one set of fixing rods 3 is connected to the limiting grid in the sliding groove 102, and the other end of the other set of fixing rods 3 is connected to the I-beam 6. When the fixing rod 3 slides into the bottom of the U-shaped groove in the second hinge 802, the fixing rod 3 is linked to the limiting grid in the sliding groove 102, so that the retaining plate 8 is in a fixed state, ensuring the stability of the side wall of the foundation pit, so that the fixing rod 3 provides stable support during the construction process. When the fixing rod 3 slides to the top of the U-shaped groove in the second hinge 802, the retaining plate 8 can slide along the length direction of the sliding groove 102 to meet the construction requirements. The cooperation of the fixing rod 3 with the retaining plate 8 and the limiting grid in the sliding groove 102 enables the support unit to flexibly respond to foundation pits of different widths, and at the same time enhances the anti-lateral displacement ability of the structure, ensuring the stability of the support unit in a high-load environment.

[0033] Those skilled in the art can make various corresponding changes or deformations to the above technical methods and concepts, and all such changes or deformations should fall within the protection scope of the claims of the present invention.

Claims

1. A supporting structure for a deep foundation pit, characterized in that: It comprises a support unit for foundation pit support, wherein the support unit is provided with an auxiliary unit for enhancing the support capacity of the support unit; The support unit comprises a base (1), the base (1) is provided with two groups of symmetrically distributed long grooves, the two groups of long grooves are respectively connected to a baffle plate, the long grooves include two symmetrically distributed sliding grooves (102), the base (1) is evenly distributed with four mounting holes (101), the mounting holes (101) are connected with ground anchors (2) for enhancing the anti-slip performance of the device, and a bearing (103) is provided at the exact center of the base (1); The baffle plate comprises two retaining plates (8), the two retaining plates (8) are longitudinally distributed, one end of the retaining plate (8) is provided with two T-shaped blocks used in conjunction with the sliding groove (102), the other end of the retaining plate (8) is provided with two symmetrically distributed T-shaped grooves, the T-shaped groove of the lower retaining plate (8) is connected to the T-shaped block of the upper retaining plate (8), the T-shaped block on the lower retaining plate (8) is connected to the sliding groove (102), a side fixing pin (7) is rotatably installed on one surface of the retaining plate (8), and a first hinge (801) and two evenly distributed second hinges (802) are installed on the other surface of the retaining plate (8).

2. A supporting structure for a deep foundation pit according to claim 1, characterized in that: The support unit further comprises two symmetrically distributed I-beams (6), wherein the I-beams (6) are slidably connected to the T-slots of the two upper retaining plates (8).

3. A supporting structure for a deep foundation pit according to claim 1, characterized in that: A U-shaped groove is provided inside the second hinge (802).

4. A supporting structure for a deep foundation pit according to claim 1, characterized in that: A plurality of evenly distributed limiting grids are arranged in the sliding groove (102).

5. A supporting structure for a deep foundation pit according to claim 1, characterized in that: The auxiliary unit comprises a central support column (9), the central support column (9) is connected to a bearing (103), a central axis rotating member (5) is connected to the central support column (9), two symmetrically distributed connecting rods (4) are hinged to the central axis rotating member (5), and the two connecting rods (4) are respectively connected to the first hinges (801) on the two retaining plates (8).

6. A supporting structure for a deep foundation pit as claimed in claim 5, characterized in that: The auxiliary unit further comprises two groups of symmetrically distributed connection mechanisms, one group of the connection mechanisms is connected to the lower retaining plate (8), and the other group of the connection mechanisms is connected to the upper retaining plate (8), the connection mechanisms comprise four fixing rods (3), the four fixing rods (3) correspond one to one with the four second hinges (802), one end of one group of the fixing rods (3) is connected to the U-shaped groove in the lower second hinge (802), one end of the other group of the fixing rods (3) is connected to the U-shaped groove in the upper second hinge (802), the other end of one group of the fixing rods (3) is connected to the limit grid in the sliding groove (102), and the other end of the other group of the fixing rods (3) is connected to the I-beam (6).

7. A supporting structure for a deep foundation pit as claimed in claim 5, characterized in that: The upper end of the central support column (9) is fixedly connected with a central shaft cap (10).

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