A foundation pit supporting device and a foundation pit supporting system

Abstract

The application discloses a foundation pit supporting device and a foundation pit supporting system. The foundation pit supporting device comprises a pair of wall plates oppositely arranged on the side walls of a foundation pit, each wall plate is fixedly connected with an upper wall plate hook at the upper end and a lower wall plate hook at the lower end, recesses are arranged on the opposite plate surfaces of the pair of wall plates, and the upper wall plate hook and the lower wall plate hook are used for mutually hooking the upper and lower adjacent wall plates. A telescopic assembly is embeddedly connected with the recesses of the pair of wall plates at both ends, and the pair of wall plates support the side walls of the foundation pit by adjusting the length of the telescopic assembly. The combination of the telescopic assembly and the wall plates, the hooking of the upper and lower wall plates and the formation of the integral support can be suitable for narrow foundation pit supporting, and the operation mode is simple and efficient.

Description

Technical Field

[0001] This utility model belongs to the field of foundation pit support technology, specifically, it relates to a foundation pit support device and a foundation pit support system. Background Technology

[0002] In contemporary society, urbanization is progressing rapidly, and cities are expanding at an unprecedented pace. As a crucial foundation for urban development, municipal infrastructure construction, including streetlights, traffic poles, and multifunctional smart light poles, is experiencing a significant increase in demand. These poles are widely distributed throughout the city, serving key functions such as lighting, traffic guidance, and information exchange, playing an indispensable role in ensuring the normal operation of the city.

[0003] However, the foundation construction of the poles faces numerous severe challenges. Since municipal road construction is usually completed first, and the management departments and property owners of light poles and signal poles differ, subsequent construction of the pole foundations must avoid damaging the road, including the road surface, and excavation from the foundation base towards the road is prohibited to prevent encroachment on road boundaries. This results in extremely limited available space for subsequent pole foundation excavation, with exceptionally narrow working surfaces. The foundation pit width is typically around 1 meter, and the foundation shape is often wall-like. The implementation process is akin to creating an additional construction area within a limited, meticulously planned site, making the operation extremely complex.

[0004] Currently, existing construction methods for foundation pits of varying depths have significant drawbacks. For deeper foundation pits, sheet pile support is traditionally the most common method. Sheet pile support is expensive, and the costs of transporting, installing, and subsequently dismantling the pits, including the rental of various machinery and equipment and the labor involved, significantly increase the overall cost of foundation pit support, placing a heavy burden on the project budget. Furthermore, some foundation pits are adjacent to road structures, and the limited space restricts the operation of large sheet pile construction machinery. Even slight errors during construction can easily damage the road structure or underground pipelines, thus interfering with normal road traffic and significantly increasing the difficulty of construction.

[0005] In contrast, shallower foundation pits are currently commonly excavated directly without any support measures. This simplistic approach actually harbors significant safety risks. Due to the narrow working area, to minimize encroachment on the surrounding limited space, construction companies typically opt for gentle slopes or even vertical excavation. As a result, the stability of the soil around the foundation pit is severely compromised. Under the influence of rainwater infiltration, vehicle load vibrations, or the weight of the soil itself, collapse accidents are highly likely to occur. This not only poses a direct threat to the lives of construction workers but may also damage existing municipal facilities, triggering a series of secondary disasters and leading to unpredictable losses.

[0006] In view of the above situation, it is necessary to develop a support scheme that can be applied to the support of narrow foundation pits of different depths. Utility Model Content

[0007] This application provides a foundation pit support device and system, which is a tool-type, reusable support structure system suitable for narrow foundation pits and for simultaneous excavation and support. The system incorporates adjustable-length threaded rods and wall panels, effectively overcoming the challenges of high construction costs and insufficient safety guarantees in narrow foundation pit support through structural combination. Furthermore, the system is characterized by simple operation, reusability, and convenient storage, creating a new path for narrow foundation pit support construction that combines high efficiency and safety.

[0008] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0009] Firstly, a foundation pit support device is provided, comprising:

[0010] A pair of wall panels are arranged opposite each other on the side wall of the foundation pit. Each wall panel has a wall panel hook fixedly connected to the upper end and a wall panel hook fixedly connected to the lower end. Grooves are provided on the opposite surfaces of the pair of wall panels. The wall panel hooks and wall panel hooks are used to hook with the adjacent wall panels above and below.

[0011] The telescopic component is connected to the grooves of the pair of wall panels at both ends. By adjusting the length of the telescopic component, the pair of wall panels can support the sidewalls of the pit.

[0012] Optionally, the telescopic assembly includes a screw, a sleeve, and a sleeve pushing member. The sleeve is sleeved on the outer periphery of the screw, and the opposite ends of the sleeve and the screw are respectively embedded in the corresponding grooves. The sleeve pushing member is threadedly connected to the screw at the end opposite to the sleeve.

[0013] Optionally, a connecting plate is fixedly connected to the opposite ends of the screw and the sleeve, and the shape of the groove is the same as that of the connecting plate, with the connecting plate embedded in the corresponding groove.

[0014] Optionally, the connecting plate and the groove are square.

[0015] Optionally, the groove is formed from the wall panel by removing material or by adding material.

[0016] Optionally, forming by adding materials means that multiple panels extend from the surface of the wall panel to form a groove, and multiple connecting ribs are provided on the outer perimeter of the groove.

[0017] Optionally, the hooks on the wall panel and the hooks on the bottom of the wall panel bend in opposite directions.

[0018] Optionally, the hook on the wall panel is formed by extending vertically upward from the top of the wall panel and then making two right-angle bends, while the hook at the bottom of the wall panel is formed by extending vertically downward from the bottom of the wall panel and then making two right-angle bends.

[0019] Optionally, the right-angle bend distance of the hook on the wall panel is the same as the right-angle bend distance of the hook at the bottom of the wall panel.

[0020] Secondly, a foundation pit support system is provided, including multiple foundation pit support devices as described above. The multiple foundation pit support devices are installed in the foundation pit in a multi-row and multi-column manner, wherein the wall panels of adjacent foundation pit support devices are connected by hooks on the upper wall panel and hooks on the lower wall panel to form a continuous wall panel, or the wall panels of adjacent foundation pit support devices are spaced apart.

[0021] Optionally, a transverse support member is also provided between the wall panel of the transverse multiple foundation pit support device and the side wall of the foundation pit.

[0022] Optionally, the lateral support member is a steel beam or a wooden brace.

[0023] Compared with the prior art, this application has the following advantages:

[0024] (1) This application combines the telescopic components with the wall panels, and adjusts the length of the telescopic components to make the wall panels support the side wall of the foundation pit. The operation is simple and efficient. The upper and lower wall panels are connected to form an overall support. It does not require the large construction equipment required for steel sheet pile support and is suitable for narrow foundation pit support.

[0025] (2) This application adopts the construction method of excavation and support at the same time. The upper and lower wall panels are connected by hooks so that the vertical upper wall panels form a whole, which is similar to the effect of steel sheet pile support. However, its construction convenience and construction efficiency far exceed that of steel sheet pile support, and its construction cost is far lower than that of steel sheet pile support.

[0026] (3) The expansion joint is connected to the wall panel by the groove of the connecting plate, and the upper and lower wall panels are connected by hooks, so that the foundation pit support device is a detachable structure and can be reused, which can further reduce the project cost.

[0027] (4) The foundation pit support device of this application can be used for excavation and support at the same time, without the use of large construction equipment. The foundation pit support device has a simple and lightweight structure, less ground load, and improves construction safety. Attached Figure Description

[0028] Figure 1 This is a top view of the installation of the foundation pit support device according to an embodiment of the present utility model.

[0029] Figure 2 This is a side view of the installation of the foundation pit support device according to an embodiment of the present utility model.

[0030] Figure 3 This is a side view of a wall panel according to an embodiment of the present utility model.

[0031] Figure 4 This is a front view of the wall panel described in an embodiment of this utility model.

[0032] Figure 5 This is a side view of another wall panel according to an embodiment of the present utility model.

[0033] Figure 6 This is a schematic diagram of the upper and lower wall panel hanging according to an embodiment of the present utility model.

[0034] Figure 7 This is a schematic diagram of a wall panel with grooves formed by adding materials, as described in an embodiment of the present invention.

[0035] Figure 8 This is a schematic diagram of the support provided by the transverse support member as described in an embodiment of the present invention.

[0036] Figure 9 This is a schematic diagram of another wall panel hanging method according to an embodiment of the present utility model. Detailed Implementation

[0037] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. 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.

[0038] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after connection. "Rotary connection" refers to a connection where the components can rotate relative to each other after connection. The directional terms mentioned in the embodiments of this application, such as "upper," "lower," "inner," and "outer," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. The phrase "two components obtain an integrated structure through an integral molding process" means that during the formation of one of the two components, that component is connected to the other component, without requiring further processing (such as bonding, welding, snap-fit ​​connection, or screw connection) to connect the two components together.

[0039] In existing technologies, deep foundation pits are often supported by methods such as piles, sheet piles, or anchors. From a cost perspective, sheet piles are expensive. In addition, the costs of transportation, installation, and subsequent dismantling, including the rental of various machinery and equipment and professional labor, significantly increase the overall cost of foundation pit support, placing a heavy burden on the project budget.

[0040] Furthermore, the construction process of sheet pile and other support methods involves the precise installation of multiple steps and systems, such as the alignment of the top support system with the retaining piles, and the installation and adjustment of the underpinning system. This demands a high level of technical skill from the construction personnel. Improper operation can affect the support effect, increase construction risks, and make it difficult to guarantee construction efficiency. In narrow tunnels, limited space makes operation inconvenient for construction personnel, installation and adjustment difficult, and may also affect the safety of the surrounding environment and existing structures.

[0041] Furthermore, taking sheet pile support as an example, sheet piles occupy a large space when installed along the width of the foundation pit during construction, with a cumulative short dimension of no less than 700mm on both sides. For wall-type foundations with a width of about 1m, this space occupancy ratio is high. This not only compresses the operating space for subsequent foundation construction, restricting the space for workers to perform delicate procedures such as rebar tying and formwork erection, making them prone to collisions and affecting construction progress and quality, but also alters the stress distribution around the foundation pit, posing a potential threat to the pit's stability. In addition, sheet piles need to be extracted, preventing the foundation from being poured in the original pit, thus reducing the foundation's stability.

[0042] To address the above problems, this embodiment provides a foundation pit support device, please refer to... Figure 1 and Figure 2 The foundation pit support device includes a pair of wall panels 1 for supporting the side walls of the foundation pit; and a telescopic component, with both ends for connecting to the wall panels 1, which extends and abuts against the wall panels 1 to support the foundation pit.

[0043] The wall panel 1 can be a rectangular plate, and they are arranged in pairs. A pair of wall panels 1 are arranged opposite each other on the sidewall of the foundation pit, and the pair of wall panels 1 are used to compress and stabilize the sidewall of the foundation pit under the support of the telescopic components. Multiple foundation pit support devices are installed within the foundation pit. Specifically, multiple pairs of wall panels 1 can be spaced apart along the length of the foundation pit. Figure 1 This is a top view showing the arrangement of the foundation pit support device within the foundation pit; only a section along the length of the pit is shown. Multiple pairs of wall panels 1 are also installed along the depth of the pit, such as... Figure 2 This is a cross-sectional view of the foundation pit support device arranged in the foundation pit. It can be seen that 5 pairs of wall panels 1 are arranged in the depth direction of the foundation pit in this cross-section. It should be noted that the wall panels 1 should be arranged in or approximately in the same vertical direction in the depth direction of the foundation pit so that adjacent wall panels 1 in the vertical direction can be connected by hooks.

[0044] The telescopic assembly may include a first connector and a second connector, which are connected to each other. The first connector and the second connector can be moved axially by operation, thereby changing the length of the telescopic assembly.

[0045] In some embodiments, the telescopic assembly includes a screw 2, a sleeve 4, and a sleeve pushing member 3. One end of the screw 2 is connected to the wall panel 1, and one end of the sleeve 4 is fitted around the outer periphery of the other end of the screw 2, while the other end is connected to the wall panel 1. The sleeve pushing member 3 is threadedly connected to the screw 2, and the sleeve pushing member 3 contacts the aforementioned end of the sleeve 4. When the sleeve pushing member 3 is rotated, it undergoes a helical linear displacement along the screw axial direction, thereby pushing the sleeve 4 to undergo an axial linear displacement, causing the telescopic assembly to change length. Since both ends of the telescopic assembly are connected to the wall panel 1, the telescopic assembly pushes the wall panel 1 to compress the sidewall of the foundation pit, achieving the purpose of foundation pit support.

[0046] To facilitate the rotation of the sleeve pushing component 3, rods are fixedly connected to both sides of the sleeve pushing component 3. By holding the rods and rotating the sleeve pushing component 3, a helical linear motion is generated with the screw, which pushes the sleeve 4 to move axially, causing the telescopic component to change length.

[0047] The connection between the telescopic assembly and the wall panel 1 can be achieved through a connecting plate and a groove. A connecting plate 5 is fixedly connected to the opposite ends of the screw 2 and the sleeve 4. A groove 12 is provided on each opposite side of a pair of wall panels 1, preferably positioned in the middle. The shape of the groove 12 is the same as the shape of the connecting plate 5, allowing the connecting plate 5 to be embedded in the groove 12. The groove 12 allows both ends of the telescopic assembly to be embedded in the wall panel 1, thereby pushing the wall panel 1 by the extension of the telescopic assembly. For example, the connecting plate 5 and the groove 12 are square, which can limit the circumferential movement of the sleeve and screw, thus enabling the telescopic assembly to reliably extend and retract.

[0048] However, this embodiment does not limit the shape of the connecting plate 5 and the groove 12. For example, they can be circular or any other shape, as long as the connecting plate 5 can be embedded in the groove 12.

[0049] Furthermore, the groove 12 is not limited to being formed by removing material from the wall panel 1; it can also be formed by adding material. Please refer to [reference needed]. Figure 7 Four panels extend from the surface of wall panel 1 to form a rectangular groove 12, and connecting plate 5 can also be embedded in this groove 12. Furthermore, multiple connecting ribs can be fixedly connected between the outside of the groove and the surface of wall panel 1, for example, a connecting rib can be set at each of the four corners of the groove.

[0050] In some embodiments, the telescopic assembly may consist only of a screw 2 and a sleeve 4. One end of the screw 2 is threadedly connected to the sleeve 4, and the other end of the screw 2 is fixedly connected to the connecting plate 5. One end of the sleeve is threadedly connected to the screw, and the other end is fixedly connected to the connecting plate 5. By rotating the sleeve 4, the sleeve 4 undergoes a helical linear motion along the axial direction, thereby changing the length of the telescopic assembly. When the telescopic assembly becomes longer, both ends of the telescopic assembly push the wall panel 1 to compress the sidewall of the foundation pit. When the telescopic assembly becomes shorter, the wall panel 1 separates from the sidewall of the foundation pit, allowing the foundation pit support device to be disassembled and reused later.

[0051] To facilitate rotating the sleeve, a handle can be fixedly connected to the outer wall of the sleeve. Specifically, a connecting sleeve is fixedly connected to the outer wall of the sleeve, and rods are fixedly connected to both sides of the connecting sleeve. By holding the rod and rotating the connecting sleeve, the sleeve fixedly connected to it will rotate together, thereby producing a helical linear motion with the screw, causing the telescopic component to change length.

[0052] It should be noted that, since this type of sleeve operates on a helical linear motion, when the connecting plates at both ends of the screw and sleeve are embedded in the groove of the wall plate 1, to prevent the wall plate 1 from rotating due to the rotation of the sleeve 4, the connecting plate 5 and the groove can be made circular. Of course, this method inevitably results in friction between the connecting plate 5 and the groove, and is not the optimal solution.

[0053] Furthermore, the screw and sleeve are merely examples, and the telescopic assembly is not limited to this single structure. It can also be a telescopic assembly driven by electro-hydraulic or other methods, such as a hydraulic cylinder, pneumatic cylinder, linear actuator, or other linear drive mechanism.

[0054] The telescopic assembly can only push and compress the sidewall of the foundation pit by pushing against the wall panel 1. If multiple wall panels 1 can be connected as a whole, the foundation pit support effect can be improved. The structure of the wall panel 1 is described below. By hooking together, it can form a whole and improve the stability of the foundation pit support.

[0055] Figure 3 This is a side view of wall panel 1 according to an embodiment of this application. Figure 4 This is a front view of wall panel 1 according to an embodiment of this application. Please refer to... Figure 3 , Figure 4 The wall panel 1 includes an upper wall panel hook 11 and a lower wall panel hook 13. The upper wall panel hook 11 is fixedly connected to the upper end of the wall panel 1, and the lower wall panel hook 13 is fixedly connected to the lower end of the wall panel 1. The bending directions of the upper wall panel hook 11 and the lower wall panel hook 13 are opposite. This allows two adjacent wall panels to be connected by hooks, that is, the lower wall panel hook 13 of the upper adjacent wall panel is hooked together with the upper wall panel hook 11 of the lower adjacent wall panel, so that the adjacent wall panels can be interlocked.

[0056] For example, the hook 11 on the wall panel is formed by extending vertically upward from the top of the wall panel 1 and then making two right-angle bends. Similarly, the hook 13 on the bottom of the wall panel is formed by extending vertically downward from the bottom of the wall panel 1 and then making two right-angle bends, except that its right-angle bend direction is opposite to that of the hook 11 on the wall panel.

[0057] For example, the hook 11 on the wall panel extends vertically upward from one edge of the upper end of the wall panel, while the hook 13 on the lower end of the wall panel extends vertically downward from the other edge of the lower end of the wall panel. Figure 3 In the middle, the hook 11 on the wall panel extends vertically upward from the edge of the side where the groove 12 is located at the top of the wall panel, then bends at a right angle to the left and then bends at a right angle downward. The hook 13 on the bottom of the wall panel extends vertically downward from the edge of the bottom of the wall panel opposite to the groove, then bends at a right angle to the right and then bends at a right angle upward.

[0058] Of course, such as Figure 5 As shown, the hook 11 on the wall panel can also extend vertically upwards from the edge opposite to the groove 12 at the top of the wall panel, then bend at a right angle to the right and then bend downwards at a right angle. The hook 13 at the bottom of the wall panel extends vertically downwards from the edge of the groove at the bottom of the wall panel, then bends at a right angle to the left and then bends upwards at a right angle.

[0059] Furthermore, the right-angle bend distance of the hook 11 on the wall panel is the same as the right-angle bend distance of the hook 13 on the lower part of the wall panel, thus ensuring that when they are hung together, as... Figure 6 As shown, the hook 11 on the wall panel and the hook 13 on the lower wall panel can fit tightly together, improving the stability of the connection between adjacent wall panels.

[0060] Furthermore, wall panel 1 can be discontinuous in the vertical direction, in which case the hooks do not need to be connected to adjacent hooks. Also, transverse support components, such as steel beams or wooden braces, can be added between wall panel 1 and the sidewall of the foundation pit. Figure 8 As shown, horizontal support members 6 are placed between multiple horizontal wall panels and the sidewall of the foundation pit. The horizontal support members 6 increase the contact area between the support and the sidewall of the foundation pit, and combine the supporting force of the multiple horizontal wall panels 1 to be applied to the sidewall of the foundation pit, thereby improving the stability of the foundation pit support.

[0061] In some embodiments, the bending directions of the upper and lower hooks of wall panel 1 can be the same, while the bending directions of the hooks of adjacent wall panels are opposite. For example... Figure 9 In this design, the upper and lower hooks of the top wall panel bend in the same direction, while the lower wall panel also bends in the same direction. However, the hooks on the top wall panel bend in the opposite direction to those on the bottom wall panel. This creates two different sizes of wall panels, which can be installed alternately.

[0062] The foundation pit support device disclosed in this application is mainly used for supporting narrow foundation pits. It allows for simultaneous excavation and support. During construction, multiple foundation pit support devices can be arranged along the plane according to the length of the foundation pit, and multiple devices can be arranged simultaneously along the depth of the foundation pit. The degree of support for the foundation pit sidewalls can be adjusted by adjusting the length of the telescopic components. This effectively overcomes the problems of high construction costs and insufficient safety guarantees in the support of narrow foundation pits. At the same time, this foundation pit support device is characterized by simple operation, reusability, and convenient storage, creating a new path for the construction of narrow foundation pit support that combines high efficiency and safety.

[0063] The following describes the method of using the aforementioned multiple foundation pit support devices for foundation pit support, which mainly consists of two processes: layered excavation and support, and reverse demolition, including:

[0064] (1) Layered excavation and support

[0065] First, determine the excavation area of ​​the foundation pit, calculate the horizontal and vertical distances of the supports, and clarify the required number of supports and wall panels. After excavating to a certain depth, place wall panels 1 on the sidewall of the foundation pit, and embed the connecting plates at the ends of the screw rods 2 and sleeves 4 into the grooves of the wall panels. Adjust the length of the telescopic components, for example, by rotating the sleeve jacking component 3, so that the sleeve jacking component 3 pushes the sleeve 4 linearly to the predetermined position, so that the wall panels 1 at both ends are supported on the sidewall of the foundation pit with a certain pressure. Then continue excavating downwards. After excavating to the specified depth, hook the upper hook of the wall panel to be assembled onto the lower hook of the wall panel already in place, so that the two wall panels are locked together. Then install the telescopic components and adjust their length. Continue excavating downwards, and cyclically install wall panels and telescopic components until the design elevation is reached.

[0066] Depending on the soil type, the number of vertical supports required can be adjusted, and the wall panels can be designed to be vertically continuous or vertically discontinuous. Horizontal support components, such as steel beams or wooden planks, can also be added.

[0067] (2) Reverse dismantling

[0068] Demolition should proceed from bottom to top. First, backfill the pit up to the bottom of the wall panel, or implement other temporary support measures. Then, remove the bottommost adjustable-length bolts, followed by the corresponding wall panel. Continue this process until complete removal. All dismantled components can be reused.

[0069] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications all fall within the protection scope of the claims of this utility model.

Claims

1. A foundation pit support device, characterized in that, include: A pair of wall panels are arranged opposite each other on the side wall of the foundation pit. Each wall panel has a wall panel hook fixedly connected to the upper end and a wall panel hook fixedly connected to the lower end. Grooves are provided on the opposite surfaces of the pair of wall panels. The wall panel hooks and wall panel hooks are used to hook with the adjacent wall panels above and below. The telescopic component is connected to the grooves of the pair of wall panels at both ends. By adjusting the length of the telescopic component, the pair of wall panels can support the sidewalls of the pit.

2. The foundation pit support device according to claim 1, characterized in that, The telescopic assembly includes a screw, a sleeve, and a sleeve pushing component. The sleeve is sleeved on the outer periphery of the screw, and the opposite ends of the sleeve and the screw are respectively embedded in the corresponding grooves. The sleeve pushing component is threadedly connected to the screw at the end opposite to the sleeve.

3. The foundation pit support device according to claim 2, characterized in that, A connecting plate is fixedly connected to one end of the screw and the sleeve that are opposite to each other. The shape of the groove is the same as that of the connecting plate, and the connecting plate is embedded in the corresponding groove.

4. The foundation pit support device according to claim 3, characterized in that, The connecting plate and the groove are square.

5. The foundation pit support device according to claim 1, characterized in that, The groove is formed from the wall panel by removing material or by adding material.

6. The foundation pit support device according to claim 5, characterized in that, Formed by adding materials, which means that multiple panels extend from the surface of the wall panel to form a groove, and multiple connecting ribs are set on the outer perimeter of the groove.

7. The foundation pit support device according to claim 1, characterized in that, The hooks on the wall panel and the hooks on the bottom of the wall panel bend in opposite directions.

8. The foundation pit support device according to claim 7, characterized in that, The hook on the wall panel is formed by extending vertically upwards from the top of the wall panel and then making two right-angle bends. The hook at the bottom of the wall panel is formed by extending vertically downwards from the bottom of the wall panel and then making two right-angle bends.

9. The foundation pit support device according to claim 8, characterized in that, The right-angle bend distance of the hook on the wall panel is the same as the right-angle bend distance of the hook at the bottom of the wall panel.

10. A foundation pit support system, characterized in that, The invention includes multiple foundation pit support devices as described in any one of claims 1 to 9, wherein the multiple foundation pit support devices are installed in the foundation pit in a multi-row and multi-column manner, wherein the wall panels of the upper and lower adjacent foundation pit support devices are connected by hooks on the upper wall panels and hooks on the lower wall panels to form a continuous wall panel, or the wall panels of the upper and lower adjacent foundation pit support devices are spaced apart.

11. The foundation pit support system according to claim 10, characterized in that, Horizontal support components are also installed between the wall panels of the horizontal multiple foundation pit support devices and the side walls of the foundation pit.

12. The foundation pit support system according to claim 11, characterized in that, The lateral support components are steel beams or wooden supports.

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