A recyclable supporting device for foundation pit

Abstract

The utility model discloses a kind of turnover's foundation pit support changing device, including the support column and the jacking post of swing connection, adjusting mechanism is installed on the jacking post, for adjusting the length of jacking post;Still including the locking device of the length of jacking post is fixed.This application is designed into two sections split type support column and jacking post by support changing device, and it is locked by screw thread connection between the two, and by adjusting mechanism and locking device locking.Thereby, installation step is simplified, make device can adapt to narrow space operation, and promote construction efficiency, realize quick support changing.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology, specifically relating to a reusable foundation pit support replacement device. Background Technology

[0002] In foundation pit engineering, foundation pit support is a key technical measure to ensure the safety of the foundation pit and the stability of the surrounding environment. Temporary supports within the foundation pit can affect subsequent structural construction after the underground structure is completed, necessitating support replacement. Therefore, foundation pit support replacement is a crucial process for ensuring the stability of the foundation pit and the safety of underground structure construction, affecting the safety and progress of the entire project. Traditional concrete support replacement techniques mainly include plain concrete support slabs and plain concrete support beams, which involve erecting formwork in the pit space and pouring concrete to achieve the force transfer between the retaining structure and the main structure.

[0003] However, traditional plain concrete support slabs require on-site formwork erection, concrete pouring, and curing to form the support components. This process is cumbersome, taking 1-2 days per installation and heavily reliant on manual labor. The connection between the support components and the retaining structure is often a one-time design; the concrete supports are generally buried with the backfill soil as permanent components, lacking recycling value and hindering green construction and cost savings. Furthermore, on-site formwork erection and pouring are required for different pit sizes, making it difficult to adapt to complex geological conditions or confined construction spaces. The cramped trench space also restricts workers' work for extended periods and poses high risks.

[0004] To solve the above problems, it is necessary to provide a reusable steel support replacement device. Utility Model Content

[0005] In order to solve the above problems, this utility model provides a reusable foundation pit support replacement device.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A reusable foundation pit support replacement device includes a movably connected support column and a top support column, wherein an adjustment mechanism is installed on the top support column for adjusting the length of the top support column; it also includes a locking device for fixing the length of the top support column.

[0008] In a further embodiment, the support column and the top support column are threaded together, the support column has an internal thread, and one end of the top support column has an external thread that mates with the internal thread.

[0009] In a further embodiment, a top support plate is movably connected to the end of the top support column away from the support column, and a connecting plate is fixedly connected to the end of the support column away from the top support column.

[0010] In a further embodiment, the top support column and the top support plate are connected by a bearing, allowing the top support column to rotate.

[0011] In a further embodiment, a reinforcing rib is connected between the support column and the connecting plate; a friction layer is fixed on the outer surface of both the top support plate and the connecting plate.

[0012] In a further embodiment, the locking device includes a locking nut fixed inside the support column and a limiting pin connected to the adjusting mechanism; the locking nut is threaded to the end of the top support column to lock the end of the top support column; the limiting pin is connected to the top support plate to restrict the rotation of the top support column.

[0013] Preferably, the locking member is at least 20cm away from the port of the support column near the top support column; the top support plate is provided with a pin hole, and the limiting pin is inserted into the pin hole to limit the rotation of the top support column.

[0014] The beneficial effects of this invention are:

[0015] 1. This application designs the support replacement device as two separate support columns and a top support column, which are connected by threads, simplifying the installation steps and enabling the device to adapt to operation in confined spaces. Compared with the traditional concrete support replacement process, which requires 1-2 days of installation time, the device of this invention can significantly improve construction efficiency and achieve rapid support replacement.

[0016] 2. The replacement support device of this application can be 100% reused, unlike the traditional practice of burying support components as permanent components with backfill soil. This greatly improves the material reuse rate, reduces material waste, and lowers construction costs.

[0017] 3. The installation and connection of the support replacement device in this application do not require welding construction, which reduces environmental pollution and the risk of hot work. At the same time, it does not rely on other tools, reducing the use of construction machinery, and is more in line with the concept of green construction.

[0018] 4. This application, through the movable connection design of the support column and the top support column, combined with the adjustment mechanism and locking device, enables the device to adapt to the requirements of foundation pits of different sizes, solving the problem of traditional methods that require the erection of formwork and on-site pouring for different foundation pit sizes, and improving the adaptability and versatility of the device. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a cross-sectional view of the present invention.

[0022] In the diagram: 1. Connecting plate; 2. Top support plate; 3. Support column; 4. Top support column; 5. Adjustment mechanism; 6. Reinforcing rib; 7. Limit pin; 8. Bearing; 9. Locking nut. Detailed Implementation

[0023] The present application will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present application can be combined with each other.

[0024] like Figure 1-2 As shown, a reusable foundation pit support replacement device includes a support column 3 and a top support column 4 that are movably connected. An adjustment mechanism 5 is installed on the top support column 4 for adjusting the length of the top support column 4. It also includes a locking device for fixing the length of the top support column 4.

[0025] Specifically, the support column 3 and the top support column 4 are threaded together. The support column 3 has an internal thread, and one end of the top support column 4 has an external thread that mates with the internal thread. This threaded connection allows for a movable connection between the support column and the top support column. By rotating the top support column 4, the relative position between the two can be adjusted, thereby changing the overall length of the device.

[0026] In this embodiment, the adjusting mechanism 5 is preferably a knob with an "I" shape, which is convenient for rotation operation. Both the support column 3 and the top support column 4 are made of high-strength steel. The support column 3 is square steel with an internal threaded hole at one end; while the top support column 4 is round steel with an external thread on the outer circumference of its end.

[0027] A top support plate 2 is movably connected to the end of the top support column 4 away from the support column 3, and a connecting plate 1 is fixedly connected to the end of the support column 3 away from the top support column 4. The top support plate and the connecting plate are located at both ends of the device and are used to contact the side walls of the foundation pit to provide support and fixation.

[0028] To facilitate the rotation of the top support column, the top support column 4 is connected to the top support plate 2 via a bearing 8. Specifically, the outer ring of the bearing 8 is fixedly connected to the top support plate 2, and the inner ring is connected to the end of the top support column 4, allowing the top support column 4 to rotate freely relative to the top support plate and facilitating adjustment of the column's length. Standard rolling bearings are used, capable of withstanding significant axial and radial forces, ensuring the stability of the top support column during rotation.

[0029] To enhance the overall strength of the support device, a reinforcing rib 6 is connected between the support column 3 and the connecting plate 1; a friction layer is fixed to the outer surfaces of both the top support plate 2 and the connecting plate 1. The reinforcing rib strengthens the connection between the support column and the connecting plate, improving the stability and load-bearing capacity of the entire device. The friction layer increases the friction between the top support plate, the connecting plate, and the pit wall, preventing slippage during use. The friction layer can be made of rubber or other materials with a high coefficient of friction, or its outer surface can be mechanically hammered into an uneven surface.

[0030] In this embodiment, the locking device includes a locking nut 9 fixed inside the support column 3 and a limiting pin 7 connected to the adjusting mechanism 5. The locking nut 9 is threadedly engaged with the end of the top support column 4 to lock the end of the top support column 4. That is, when the top support column 4 is screwed into the support column 3 to a certain depth, its end will be screwed into the locking nut 9, thereby secondary fixing of the end of the top support column 4 and preventing displacement of the top support column 4 when subjected to external force. The limiting pin 7 is connected to the top support plate 2 to limit the rotation of the top support column 4, thereby further limiting the rotation of the top support column and enhancing the stability of the device. Specifically, a pin hole is provided on the top support plate 2, and the limiting pin 7 is inserted into the pin hole to limit the rotation of the top support column 4. The limiting pin can also be pulled out when adjustment is needed, allowing the top support column to rotate freely.

[0031] In this embodiment, the locking member 9 is at least 20cm away from the port of the support column 3 on the side closest to the top support column 4; that is, it ensures that the top support column 4 is screwed into the support column 3 by at least 20cm, thereby enhancing the overall connection strength of the device.

[0032] The working principle of the reusable foundation pit support replacement device in this embodiment is as follows:

[0033] First, place the foundation pit support device between the two side walls of the foundation pit. First, abut the connecting plate against one side wall of the foundation pit. Then, rotate the top support column using the adjusting mechanism 5. Due to the threaded connection between the top support column and the support column, their relative positions can be adjusted, thereby changing the overall length of the device until the top support plate abuts against the other side wall of the foundation pit. Then, continue rotating and extending the top support column to continue applying force to the top support plate, strengthening the supporting force between the top support plate and the foundation pit. Finally, insert the limiting pin into the pin hole on the top support plate to restrict the rotation of the top support column and ensure the stability of the device. When it is necessary to dismantle or move the device, simply pull out the limiting pin and rotate the top support column in the opposite direction to adjust the length of the device, facilitating disassembly and reuse. Simultaneously, because the end of the top support column is connected to the locking nut, displacement of the top support column is prevented.

[0034] Therefore, the reusable foundation pit support replacement device of this embodiment has the advantages of simple structure, convenient operation and reusability, which can effectively solve the support problem in the foundation pit construction process and improve construction efficiency and safety.

[0035] In another embodiment, the support column and the top support column can also be connected by a slotted sliding connection. That is, the support column has a longitudinal guide rail inside, and one end of the top support column has a slider that cooperates with the guide rail. However, a fixing device, such as a fixing pin, is required to connect the support column and the top support column through. The specific design can be made according to the actual situation.

[0036] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application shall be within the scope of protection of the pending claims of this application.

Claims

1. A reusable foundation pit support replacement device, characterized in that: It includes a support column (3) and a top support column (4) that are movably connected. An adjustment mechanism (5) is installed on the top support column (4) for adjusting the length of the top support column (4). It also includes a locking device for fixing the length of the top support column (4).

2. The reusable foundation pit support replacement device according to claim 1, characterized in that: The support column (3) and the top support column (4) are threaded together. The support column (3) has an internal thread, and one end of the top support column (4) has an external thread that matches the internal thread.

3. The reusable foundation pit support replacement device according to claim 1, characterized in that: The top support column (4) is movably connected to a top support plate (2) at one end away from the support column (3), and a connecting plate (1) is fixedly connected to the other end of the support column (3) away from the top support column (4).

4. A reusable foundation pit support replacement device according to claim 3, characterized in that: The top support column (4) is connected to the top support plate (2) by a bearing (8), so that the top support column (4) can rotate.

5. A reusable foundation pit support replacement device according to claim 3, characterized in that: A reinforcing rib (6) is also connected between the support column (3) and the connecting plate (1); a friction layer is fixed on the outer side of both the top support plate (2) and the connecting plate (1).

6. A reusable foundation pit support replacement device according to claim 3, characterized in that: The locking device includes a locking nut (9) fixed inside the support column (3) and a limiting pin (7) connected to the adjusting mechanism (5); the locking nut (9) is threadedly engaged with the end of the top support column (4) to lock the end of the top support column (4); the limiting pin (7) is connected to the top support plate (2) to restrict the rotation of the top support column (4).

7. A reusable foundation pit support replacement device according to claim 6, characterized in that: The locking member (9) is at least 20cm away from the port of the support column (3) on the side close to the top support column (4); the top support plate (2) is provided with a pin hole, and the limiting pin (7) is inserted into the pin hole to limit the rotation of the top support column (4).

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