An assembled and installed subway foundation pit supporting structure

Abstract

The utility model discloses a subway foundation pit support structure of assembled installation, relates to support structure field, including the bottom plate, the end of bottom plate is rotatoryly installed with the support board through the rotary component, the side fixed mounting of bottom plate has the extension block, and the side of extension block and the side of support board realize installation through the both ends of screw and electric push rod, the end of support board is provided with the strip groove, the inside of bottom plate is provided with the gap. The utility model drives the rotation of the driving lever through the rotation of the driving block, and then drives the rotation of two threaded rods in the threaded groove and the relative movement of two threaded rods, at this moment, the smooth end of two threaded rods is away from the embedded port, so that the bottom plate and the support board are split, and the support board and the bottom plate are installed subsequently, the smooth end of two threaded rods is matched with the embedded port by reversing the rotation of the driving lever, and the bottom plate and the support board are used after assembly, so that the two plate bodies are convenient to disassemble and replace, and the rotation of the support board is not affected.

Description

Technical Field

[0001] This utility model relates to the field of support structures, specifically to a modular installation type subway foundation pit support structure. Background Technology

[0002] Subway pit support refers to a series of reinforcement and support measures taken during the construction of underground projects such as subway stations to ensure the safety and stability of the pit sidewalls and surrounding areas. Pit support can prevent pit instability and damage.

[0003] Common support structures include temporary support structures and permanent support structures. Temporary support structures also include continuous retaining walls formed by steel sheet piles or steel supports in shallow foundation pits.

[0004] For example, Chinese Patent Publication No. CN115467343A provides a slope support structure for a subway foundation pit, including a base, a fixing plate, a connecting seat, a connecting shaft, a mounting plate, a support plate, an arc-shaped adjusting plate, and fixing bolts. The fixing plate is vertically mounted on the base, and the connecting seat is located near the lower end of the fixing plate. The connecting seat is hinged to the mounting plate via the connecting shaft. The support plate is detachably connected to the side of the mounting plate away from the fixing plate. The arc-shaped adjusting plate is located near the upper end of the mounting plate on the side close to the fixing plate, with the center of the arc-shaped adjusting plate aligned with the axis of the connecting shaft. Several adjusting holes are spaced apart on the arc-shaped adjusting plate, and fixing bolts adapted to the adjusting holes are detachably inserted into the fixing plate. This invention can support slopes of different inclinations, has good applicability, and is easy to use.

[0005] However, the following problems still exist: the support structure is difficult to disassemble and assemble between the base and the support plate during actual use, especially when such temporary support is frequently damaged and replacement is particularly inconvenient. Summary of the Invention

[0006] The purpose of this utility model is to provide a modular installation type subway foundation pit support structure to solve the problem of inconvenient replacement when the base or support plate in the support device is damaged.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a modular installation type subway foundation pit support structure, including a base plate, a support plate rotatably mounted on the end of the base plate via a rotating assembly, an extension block fixedly mounted on the side of the base plate, and the side of the extension block and the side of the support plate are installed by means of screws and the two ends of an electric push rod, the end of the support plate is provided with a strip groove, and a notch is opened inside the base plate, and a rotating assembly is rotatably connected inside the notch.

[0008] Preferably, the rotating assembly includes a toggle block that is rotatably connected to the notch, and a toggle rod is fixedly inserted inside the toggle block. The toggle rod and the threaded rod are movably fitted together, and the threaded rod is threadedly connected to the threaded groove reserved inside the base plate.

[0009] Preferably, both ends of the lever are fixedly connected with protrusions, and two protrusions symmetrically arranged with reference to the central axis of the lever are a set, and both ends of the lever are provided with a set of protrusions.

[0010] The actuating rod and the protrusion move within the pre-reserved movable groove inside the threaded rod.

[0011] Preferably, there are two threaded rods, which are symmetrically arranged and slidably connected to the two ends of the actuating rod, so that the rotation of the actuating rod causes the two threaded rods to move in opposite directions inside the thread groove.

[0012] Preferably, the outer wall of one end of the threaded rod is smooth, and this end of the threaded rod matches the pre-reserved fitting opening inside the support plate and is rotatably connected. In this way, the two threaded rods move in opposite directions to match the fitting openings on both sides to realize the installation of the base plate and the support plate. Conversely, when the two threaded rods move away from the corresponding fitting openings, the base plate and the support plate can be disassembled and assembled.

[0013] Preferably, the movable groove is composed of a columnar groove and a square groove connected to the columnar groove. The inner wall of the columnar groove is in contact with the outer wall of the actuating rod to achieve a sliding connection, and the inner wall of the square groove is in contact with the outer wall of the protrusion to achieve a sliding connection. This ensures that the rotation of the actuating rod drives the rotation of the threaded rod, while the linear movement of the threaded rod at the position of the outer ring of the actuating rod is not affected.

[0014] The beneficial effects of this utility model are as follows: by rotating the toggle block, the toggle lever is driven to rotate, which in turn drives the two threaded rods to rotate inside the threaded groove and move relative to each other. At this time, the smooth ends of the two threaded rods leave the fitting opening, causing the base plate and the support plate to be separated. When installing the support plate and the base plate, the ends of the support plate and the base plate are aligned, and the toggle lever is rotated in the opposite direction to adjust the smooth ends of the two threaded rods to match the fitting opening. After assembly, it can be used. In this way, the two plates are easy to disassemble and replace, and the rotation of the support plate is not affected. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a perspective view of the overall structure of this utility model;

[0017] Figure 2 This is an exploded view of the overall structure of this utility model;

[0018] Figure 3 This is an exploded view of the internal structure of the base plate of this utility model (partially cut out).

[0019] Figure 4 This is an exploded view of the internal structure of the threaded rod of this utility model (partially cut out).

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Base plate; 2. Support plate; 3. Extension block; 4. Electric push rod; 5. Screw; 6. Strip groove; 7. Notch; 8. Rotating assembly; 801. Actuating block; 802. Actuating rod; 803. Protrusion; 804. Threaded rod; 805. Movable groove; 806. Threaded groove; 807. Fitting opening. Detailed Implementation

[0022] 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.

[0023] This utility model provides, for example Figure 1-4 The above-displayed modular subway pit support structure includes a base plate 1. A support plate 2 is rotatably mounted on the end of the base plate 1 via a rotating assembly 8. An extension block 3 is fixedly mounted on the side of the base plate 1. The side of the extension block 3 is connected to the side of the support plate 2 via screws 5 and the two ends of an electric push rod 4. A strip groove 6 is provided at the end of the support plate 2. A notch 7 is opened inside the base plate 1, and the rotating assembly 8 is rotatably connected inside the notch 7.

[0024] The rotating assembly 8 includes a toggle block 801 rotatably connected to the notch 7, and a toggle rod 802 is fixedly inserted inside the toggle block 801. The toggle rod 802 and the threaded rod 804 are movably fitted together. The threaded rod 804 is threadedly connected to the threaded groove 806 reserved inside the base plate 1. Both ends of the toggle rod 802 are fixedly connected to protrusions 803. Two protrusions 803 are symmetrically arranged with reference to the central axis of the toggle rod 802 as a group. Both ends of the toggle rod 802 are provided with a group of protrusions 803. The toggle rod 802 and the protrusions 803 move inside the movable groove 805 reserved inside the threaded rod 804. Thus, the rotation of the toggle rod 802 drives the rotation of the threaded rod 804.

[0025] Two threaded rods 804 are provided, symmetrically arranged, and slidably connected to the two ends of the actuating rod 802. Rotation of the actuating rod 802 causes the two threaded rods 804 to move in opposite directions within the threaded groove 806. One end of each threaded rod 804 has a smooth outer wall and rotatably connects to a pre-drilled fitting opening 807 inside the support plate 2. This misalignment of the two threaded rods 804 with the fitting openings 807 on both sides enables the installation of the base plate 1 and the support plate 2. Conversely, when the two threaded rods 804 move away from their corresponding fitting openings 807, the base plate 1 and the support plate 2 can be disassembled.

[0026] The movable groove 805 consists of a columnar groove and a square groove connected to the columnar groove. The inner wall of the columnar groove is in contact with the outer wall of the actuating rod 802 to achieve a sliding connection, and the inner wall of the square groove is in contact with the outer wall of the protrusion 803 to achieve a sliding connection. This facilitates the rotation of the actuating rod 802, which drives the threaded rod 804 to rotate, thus enabling the threaded rod 804 to rotate and move within the threaded groove 806. This ensures that the rotation of the actuating rod 802 and the rotation of the protrusion 803 fixedly connected to the end of the actuating rod 802 are synchronized. The actuating rod 802 and the protrusion 803 move linearly within the movable groove 805, thereby driving the rotation of the threaded rod 804 with the movable groove 805. At the same time, the end of the actuating rod 802 and the protrusion 803 fixedly connected to the end of the actuating rod 802 always move within the movable groove 805, so the linear movement of the threaded rod 804 outside the actuating rod 802 is not affected, ensuring smooth movement of the threaded rod 804.

[0027] During use, after the support plate 2 is flipped to a specific angle, the electrically powered push rod 4 extends autonomously to a suitable length, thus achieving autonomous length limitation (the electric push rod is a common product on the market, and the model can be DT100). The two ends of the electric push rod 4 are installed to the sides of the extension block 3 and the support plate 2 respectively using screws 5. This limits the angle between the base plate 1 and the support plate 2. When it is necessary to disassemble or reassemble the support plate 2 and the base plate 1 later, the electric push rod 4 is first removed. Push rod 4, subsequently, the toggle block 801 rotates, driving the toggle rod 802 to rotate, which in turn drives the two threaded rods 804 to rotate inside the threaded groove 806 and move relative to each other. At this time, the smooth ends of the two threaded rods 804 leave the fitting opening 807, causing the base plate 1 and the support plate 2 to separate. When installing the support plate 2 and the base plate 1, the ends of the support plate 2 and the base plate 1 are aligned, and the toggle rod 802 is rotated in the opposite direction to adjust the smooth ends of the two threaded rods 804 to match the fitting opening 807. After assembly, it is used.

[0028] The various embodiments in this specification are described in a related manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0029] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. 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 modular installation type subway foundation pit support structure, comprising a base plate (1), characterized in that, The end of the base plate (1) is rotatably mounted with a support plate (2) via a rotating assembly (8). An extension block (3) is fixedly mounted on the side of the base plate (1). The side of the extension block (3) and the side of the support plate (2) are installed by screws (5) and the two ends of an electric push rod (4). The end of the support plate (2) is provided with a strip groove (6). The base plate (1) has a notch (7) inside, and the rotating assembly (8) is rotatably connected inside the notch (7).

2. The assembled subway foundation pit support structure according to claim 1, characterized in that, The rotating assembly (8) includes a toggle block (801) rotatably connected to the notch (7), and a toggle rod (802) is fixedly inserted inside the toggle block (801). The toggle rod (802) and the threaded rod (804) are movably fitted together, and the threaded rod (804) is threadedly connected to the threaded groove (806) reserved inside the base plate (1).

3. The assembled subway foundation pit support structure according to claim 2, characterized in that, Both ends of the lever (802) are fixedly connected with protrusions (803), and the two protrusions (803) that are symmetrically arranged with the central axis of the lever (802) as a set are a group, and both ends of the lever (802) are provided with a set of protrusions (803). The actuating lever (802) and the protrusion (803) move within the movable groove (805) reserved inside the threaded rod (804).

4. The assembled subway foundation pit support structure according to claim 3, characterized in that, The number of threaded rods (804) is two, and the two threaded rods (804) are symmetrically arranged, and the two threaded rods (804) are slidably connected to the two ends of the actuating rod (802).

5. The assembled subway foundation pit support structure according to claim 4, characterized in that, One end of the threaded rod (804) has a smooth outer wall, and this end of the threaded rod (804) matches the pre-reserved fitting port (807) inside the support plate (2) and forms a rotatable connection.

6. The assembled subway foundation pit support structure according to claim 4, characterized in that, The movable groove (805) consists of a columnar groove and a square groove connected to the columnar groove. The inner wall of the columnar groove is attached to the outer wall of the actuating rod (802) to achieve a sliding connection, and the inner wall of the square groove is attached to the outer wall of the protrusion (803) to achieve a sliding connection.

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