A prefabricated steel structure for deep foundation pit support in buildings

Abstract

This utility model relates to the field of foundation pit support technology, and discloses a prefabricated steel structure for deep foundation pit support in buildings, including: a retaining wall and transverse support columns. A continuous corrugated steel plate is provided on one side of the retaining wall. The side of the continuous corrugated steel plate is trapezoidal, narrower at the top and wider at the bottom. An upper groove is provided on the upper half of the continuous corrugated steel plate, and an I-beam connecting steel is provided inside the upper groove. A connecting plate is provided on one side of the I-beam connecting steel. The continuous corrugated steel plate is connected to the pads through the I-beam connecting steel, connecting plate, etc., increasing the contact area between the steel structure and the retaining wall. A larger contact area allows stress to be more evenly distributed on the contact surface, reducing stress concentration. Furthermore, the pads, continuous corrugated steel plate, and other components form an organic whole, jointly participating in the transmission and dispersion of force.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit support technology, specifically a prefabricated building deep foundation pit support steel structure. Background Technology

[0002] During the excavation of deep foundation pits, in order to prevent the collapse of the surrounding soil and protect the safety of the underground structure and the surrounding environment, a support structure is formed by connecting standardized steel structural components with bolts, welding or pin splicing.

[0003] For example, an existing Chinese patent (CN215562680U) discloses a deep foundation pit steel structure support device including a protective plate, a detachable waist beam connected to the protective plate, and a support assembly detachably connected to the waist beam. A support block is fixedly connected to the middle of the protective plate, forming a support groove with the protective plate. The waist beam is disposed within the support groove and is connected to the support block by bolts. The support assembly is connected to the waist beam by bolts. This application has the advantages of convenient installation and disassembly of components, and the ability to reuse components to reduce material consumption.

[0004] When existing deep foundation pit protection steel structures are used to protect deep foundation pits, the connection between the steel structure and the retaining wall is often small. Insufficient contact surface can easily lead to stress concentration, thereby weakening the overall stability of the support system. Utility Model Content

[0005] The purpose of this utility model is to provide a prefabricated building deep foundation pit support steel structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a prefabricated deep foundation pit support steel structure, comprising: an enclosure wall and transverse support columns, wherein a continuous corrugated steel plate is provided on one side of the enclosure wall, the side of the continuous corrugated steel plate is trapezoidal with a narrower upper part and a wider lower part, an upper slot is provided on the upper half of the continuous corrugated steel plate, an I-beam connecting steel is provided inside the upper slot, a connecting plate is provided on one side of the I-beam connecting steel, pads are fixed at both ends of the connecting plate, a support plate is fixed at one end of the pads, and a transverse support column is fixed at one end of the support plate.

[0007] Furthermore, a first anchor rod is provided on the enclosure wall, and the continuous corrugated steel plate is fixed to the enclosure wall through the first anchor rod.

[0008] Furthermore, the top of the continuous corrugated steel plate is provided with an L-shaped upper pull plate, and a second anchor rod is provided inside one side of the L-shaped upper pull plate.

[0009] Furthermore, one side of the L-shaped upper pull plate is snapped into the top of the continuous corrugated steel plate, and the other side of the L-shaped upper pull plate is located at the outer edge of the top of the deep foundation pit.

[0010] Furthermore, the I-beam connecting steel is bolted to the connecting plate, and the connecting plate is welded to the pad block.

[0011] Furthermore, the bottom of the enclosure wall is provided with a bottom support wall, and the bottom of the continuous corrugated steel plate is in contact with the top surface of the bottom support wall.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention, through the design of an enclosure wall, continuous corrugated steel plates, and transverse support columns, increases the contact area between the steel structure and the enclosure wall when used in prefabricated building deep foundation pit support steel structures. The continuous corrugated steel plates are connected to pads via I-beams and connecting plates. This larger contact area allows for more even stress distribution on the contact surface, reducing stress concentration. Furthermore, the pads, continuous corrugated steel plates, and other components form an organic whole, jointly participating in force transmission and dispersion. This collaborative approach further enhances the stability of the support system, ensuring reliable protection of the deep foundation pit by the protective steel structure, effectively avoiding stress concentration problems caused by insufficient contact surface, and improving the overall safety and reliability of the deep foundation pit project.

[0014] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0015] Figure 1 This is a perspective view of a prefabricated building deep foundation pit support steel structure according to the present invention;

[0016] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle;

[0017] Figure 3 This is a perspective view of a prefabricated building deep foundation pit support steel structure according to this utility model.

[0018] Figure 4 This is a top view of a prefabricated building deep foundation pit support steel structure according to the present invention.

[0019] In the diagram: 1. Enclosure wall; 2. First anchor bolt; 3. Continuous corrugated steel plate; 4. Upper slot; 5. L-shaped upper pull plate; 6. Second anchor bolt; 7. Horizontal support column; 8. I-beam connecting steel; 9. Connecting plate; 10. Pad block; 11. Support plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Please see Figures 1-4 This utility model provides a technical solution: a prefabricated steel structure for deep foundation pit support, comprising: a retaining wall 1 and transverse support columns 7. The retaining wall 1 serves as the main outer structure for deep foundation pit support, acting as a barrier against external soil and providing a basic support framework for the entire support system. The transverse support columns 7, in conjunction with the retaining wall 1 and other components, enhance the transverse stability of the support structure and prevent excessive deformation of the foundation pit in the horizontal direction. Together, they form the basic framework for deep foundation pit support.

[0022] The transverse support column 7 can be either integral or segmented. Integral transverse support columns, after being prefabricated in the factory, can be directly transported to the construction site for overall installation, reducing on-site assembly steps. However, in deep foundation pit projects, due to limited space on the construction site or restricted transportation routes, large integral transverse support columns may be difficult to transport to the designated location. Segmented transverse support columns, on the other hand, can be broken down into multiple smaller segments, facilitating transportation through narrow roads or bends, reducing transportation difficulty and costs.

[0023] One side of the retaining wall 1 is equipped with a continuous corrugated steel plate 3. The side of the continuous corrugated steel plate 3 is trapezoidal, narrower at the top and wider at the bottom. An upper slot 4 is formed in the upper half of the continuous corrugated steel plate 3, and an H-beam connecting steel 8 is installed inside the upper slot 4. A connecting plate 9 is provided on one side of the H-beam connecting steel 8. Pads 10 are fixed to both ends of the connecting plate 9, a support plate 11 is fixed to one end of each pad 10, and a transverse support column 7 is fixed to one end of the support plate. The trapezoidal structure of the continuous corrugated steel plate 3 allows it to better distribute and transmit force when subjected to soil pressure, enhancing its structural strength and stability. The upper slot 4 provides a precise installation position for the H-beam connecting steel 8, and the H-beam connecting steel 8 achieves a reliable connection with the continuous corrugated steel plate 3 through its cooperation with the upper slot 4. The connecting plate 9 is bolted to the H-beam connecting steel 8, a connection method that facilitates installation and disassembly while ensuring the strength of the connection. The connecting plate 9 is welded to the pads 10, further enhancing the overall integrity of the structure. The pad 10 and the support plate 11 are connected in sequence, and finally the force is transmitted to the horizontal support column 7, so that the whole structure forms an organic whole, which can effectively resist various loads around the deep foundation pit and ensure the safety of the foundation pit.

[0024] A first anchor rod 2 is installed on the retaining wall 1, and the continuous corrugated steel plate 3 is fixed to the retaining wall 1 through the first anchor rod 2. The first anchor rod 2 extends into the interior of the retaining wall 1, tightly connecting the continuous corrugated steel plate 3 to the retaining wall 1, enhancing the interaction force between the two, improving the integrity and deformation resistance of the entire support structure, and preventing the continuous corrugated steel plate 3 from separating from the retaining wall 1 or undergoing relative displacement under the action of soil pressure, etc.

[0025] An L-shaped top pull plate 5 is provided on the top of the continuous corrugated steel plate 3, and a second anchor rod 6 is provided inside one side of the L-shaped top pull plate 5. The L-shaped top pull plate 5 is fixed in a suitable position by the second anchor rod 6, with one side engaging with the top of the continuous corrugated steel plate 3 and the other side located at the outer edge of the top of the deep foundation pit. This design allows the L-shaped top pull plate 5 to apply an upward pulling force to the top of the continuous corrugated steel plate 3, effectively resisting the downward pressure of the soil on the continuous corrugated steel plate 3, preventing the top of the continuous corrugated steel plate 3 from sinking or deforming, and further enhancing the stability of the support structure.

[0026] One side of the L-shaped upper pull plate 5 is snapped onto the top of the continuous corrugated steel plate 3, and the other side of the L-shaped upper pull plate 5 is located at the outer edge of the top of the deep foundation pit.

[0027] The I-beam connecting steel 8 and the connecting plate 9 are connected by bolts, and the connecting plate 9 is welded to the pad 10. The bolted connection of the I-beam connecting steel 8 and the connecting plate 9 facilitates assembly and adjustment during construction, improving construction efficiency; at the same time, the bolted connection provides a degree of disassembly, facilitating later maintenance and repair of the structure. The welded connection between the connecting plate 9 and the pad 10 ensures the strength and stability of the connection, enabling reliable force transmission and ensuring the normal operation of the entire support system.

[0028] The pad block 10 plays a role in force transmission and transition in the entire support structure. Appropriate pad block size ensures uniform force distribution during transmission, avoiding stress concentration. When the width of the foundation pit changes, replacing the pad block 10 with a suitable size can adjust the force transmission path and distribution range.

[0029] For example, in a wider foundation pit, using larger pads 10 can increase the contact area with the continuous corrugated steel plate 3 and the transverse support column 7, allowing the soil pressure and other loads borne by the continuous corrugated steel plate 3 to be more evenly distributed onto the transverse support column 7, reducing local stress peaks, and thus improving the bearing capacity and stability of the entire support system. Conversely, in a narrower foundation pit, selecting smaller but appropriately sized pads 10 can meet the force transmission requirements while avoiding structural interference or material waste caused by excessively large pads.

[0030] The bottom of the retaining wall 1 is provided with a bottom support wall, and the bottom of the continuous corrugated steel plate 3 is in contact with the top surface of the bottom support wall. The bottom support wall provides bottom support for the retaining wall 1 and the continuous corrugated steel plate 3, making the stress distribution of the entire support structure more reasonable, evenly transferring the upper load to the foundation, enhancing the overall stability of the structure, and preventing the structure from sinking or becoming unstable due to insufficient bottom support.

[0031] When used in prefabricated building deep foundation pit support steel structures, the trapezoidal structure of the continuous corrugated steel plate 3 and its connection with other components allow forces to be spirally transmitted and dispersed within the structure, from top to bottom and from one side to the other. This effectively avoids localized stress concentration and improves the structure's load-bearing capacity and stability. This structure is better able to adapt to the complex and variable load conditions around deep foundation pits and is more flexible and effective in dealing with forces in different directions compared to traditional structures.

[0032] The continuous corrugated steel plate 3 is connected to the pad 10 via I-beams 8, connecting plates 9, etc., increasing the contact area between the steel structure and the retaining wall 1. A larger contact area allows stress to be distributed more evenly across the contact surface, reducing stress concentration. Furthermore, the pad 10, continuous corrugated steel plate 3, and other components form an organic whole, jointly participating in the transmission and dispersion of force. This collaborative approach further enhances the stability of the support system, ensuring that the deep foundation pit protection steel structure can reliably protect the deep foundation pit, effectively avoiding stress concentration problems caused by insufficient contact surface, and improving the safety and reliability of the entire deep foundation pit project.

[0033] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

Claims

1. A prefabricated steel structure for deep foundation pit support in building construction, comprising: The enclosure wall (1) and the transverse support column (7) are characterized in that: a continuous corrugated steel plate (3) is provided on one side of the enclosure wall (1), the side of the continuous corrugated steel plate (3) is a trapezoid with a narrow top and a wide bottom, an upper slot (4) is provided in the upper half of the continuous corrugated steel plate (3), an I-beam connecting steel (8) is provided inside the upper slot (4), a connecting plate (9) is provided on one side of the I-beam connecting steel (8), a pad (10) is fixed at both ends of the connecting plate (9), a support plate (11) is fixed at one end of the pad (10), and a transverse support column (7) is fixed at one end of the support plate.

2. The prefabricated building deep foundation pit support steel structure according to claim 1, characterized in that: The enclosure wall (1) is provided with a first anchor rod (2), and the continuous corrugated steel plate (3) is fixed to the enclosure wall (1) by the first anchor rod (2).

3. The prefabricated building deep foundation pit support steel structure according to claim 1, characterized in that: The top of the continuous corrugated steel plate (3) is provided with an L-shaped pull plate (5), and a second anchor rod (6) is provided inside one side of the L-shaped pull plate (5).

4. The prefabricated building deep foundation pit support steel structure according to claim 3, characterized in that: One side of the L-shaped pull plate (5) is snapped onto the top of the continuous corrugated steel plate (3), and the other side of the L-shaped pull plate (5) is located at the outer edge of the top of the deep foundation pit.

5. A prefabricated building deep foundation pit support steel structure according to claim 1, characterized in that: The I-beam connecting steel (8) is connected to the connecting plate (9) by bolts, and the connecting plate (9) is welded to the pad (10).

6. The prefabricated building deep foundation pit support steel structure according to claim 1, characterized in that: The bottom of the enclosure wall (1) is provided with a bottom support wall, and the bottom of the continuous corrugated steel plate (3) is in contact with the top surface of the bottom support wall.

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