Foundation pit supporting device

Abstract

The utility model belongs to the technical field of building foundation pits, and particularly relates to a foundation pit supporting structure and a foundation pit supporting device. Comprising a steel pipe vertically buried in a foundation of the inner wall of a foundation pit, and the upper portion of the steel pipe is located on the surface of the foundation pit; the plurality of support plates are vertically arranged and are arranged between two adjacent steel pipes; the reinforcing structure is used for enhancing the compressive strength of the supporting device; the reinforcing structure comprises a buried hole which extends downwards along the bottom of a foundation pit and is dug, and one end of a steel pipe is buried in the buried hole; the soil disc is arranged at the bottom of the steel pipe, and the outer diameter of the soil disc is equal to the inner diameter of the buried hole; the reinforcing ribs are arranged between the soil disc and the steel pipe; and the concrete is poured in the buried hole and the steel pipe and used for enhancing the anchoring force of the steel pipe in the buried hole. The utility model provides a foundation pit supporting structure and a foundation pit supporting device, which not only can ensure that a supporting plate is stably supported under normal conditions, but also can have enough compressive strength when a foundation pit is faced with extreme conditions such as collapse and the like.

Description

Technical Field

[0001] This utility model belongs to the field of building foundation pit technology, and in particular relates to a foundation pit support device. Background Technology

[0002] In the field of construction engineering, a foundation pit is an earthen pit excavated according to the foundation design location and specific base elevation and foundation plane dimensions. Foundation pit support, as a key measure to ensure the smooth progress of underground structure construction and maintain the safety of the surrounding environment, plays a crucial role in supporting, reinforcing, and protecting the sidewalls and surrounding environment of the foundation pit.

[0003] Among common foundation pit support methods, using support plates is a prevalent practice. However, in practical applications, traditional support plates are typically simply erected at the edge of the foundation pit. This makes the support plates highly susceptible to toppling when faced with pressure from the surrounding soil, potentially leading to foundation pit collapse and seriously threatening construction safety and the stability of the surrounding environment.

[0004] To address the issue of the support plate's tendency to tip over, existing technologies incorporate multiple inclined support rods to support the plate, and through structural designs, allow the tilt angle of the support plate to be adjusted according to actual needs. This adjustable-angle support device improves the adaptability of the support plate to a certain extent, enhancing its support capacity under different working conditions.

[0005] However, it cannot be ignored that these adjustable-angle support devices reveal a serious deficiency in compressive strength when extreme situations such as foundation pit collapse occur. When a large amount of soil instantly compresses the support device, due to the limitations of the structural design itself, it is difficult to withstand such enormous pressure and cannot effectively resist the impact of the soil, leading to the failure of the support structure. Ultimately, it fails to provide effective support for the foundation pit, resulting in huge economic losses and potential safety hazards for the project. Utility Model Content

[0006] The purpose of this utility model is to address the aforementioned technical problems by providing a foundation pit support structure and device that can ensure stable support of the support plate under normal conditions and has sufficient compressive strength when the foundation pit faces extreme situations such as collapse.

[0007] In view of this, the present invention provides a foundation pit support device, comprising:

[0008] The steel pipe is vertically buried in the foundation inside the inner wall of the foundation pit, with the upper part of the steel pipe located on the surface of the foundation pit.

[0009] Support plates, multiple vertically arranged support plates, are placed between two adjacent steel pipes to support the sidewalls of the foundation pit;

[0010] The reinforcement structure, mounted on the steel pipe, is used to enhance the compressive strength of the support device;

[0011] The reinforced structure includes:

[0012] The buried hole is excavated downwards along the bottom of the foundation pit, with one end of the steel pipe buried in the buried hole;

[0013] A soil plate is placed at the bottom of the steel pipe, and the outer diameter of the soil plate is the same as the inner diameter of the buried hole.

[0014] Reinforcing ribs are placed between the soil plate and the steel pipe. There are multiple reinforcing ribs, which are evenly spaced along the circumferential direction.

[0015] Concrete is poured into the borehole and inside the steel pipe. The soil plate expands the size of the bottom of the steel pipe. The concrete pouring into the borehole fixes the soil plate on the steel pipe inside the borehole, thereby enhancing the anchoring force of the steel pipe in the borehole.

[0016] In the above technical solution, furthermore, guide rails are provided on both the left and right sides of the steel pipe, and the support plate is set between two adjacent guide rails and inserted into the guide rails.

[0017] In any of the above technical solutions, the support plate is further made of steel sheet pile, and its cross-section is wavy.

[0018] In any of the above technical solutions, further, the surface of the support plate is provided with a transverse support beam, which is used to enhance the transverse stability of the support plate; one end of the transverse support beam is provided with a diagonal brace, and the other end of the diagonal brace is connected to the inner wall of the pit to resist the pressure of the soil on the support plate from the inner wall of the pit.

[0019] In any of the above technical solutions, the transverse support beam is further made of steel, and the surface of the transverse support beam that abuts against the support plate is concave-convex to adapt to the wavy structure of the support plate.

[0020] In any of the above technical solutions, an adjustment component is further included. The adjustment component is disposed at the connection between the transverse support beam and the diagonal brace beam and is used to adjust the relative position of the diagonal brace beam and the transverse support beam to adapt to different foundation pit working conditions.

[0021] In any of the above technical solutions, the adjustment component further includes:

[0022] Mounting holes are provided on the transverse support beam. There are multiple mounting holes, which are evenly spaced along the length of the transverse support beam.

[0023] Fixing holes are provided on the diagonal bracing beam, and the fixing holes on the diagonal bracing beam are matched with the mounting holes on the transverse support beam;

[0024] Fastening bolts, inserted between the fixing hole and the appropriate mounting hole, are used to fix the diagonal brace beam to the appropriate position on the transverse support beam.

[0025] The beneficial effects of this utility model are:

[0026] 1. Dig a hole downwards along the bottom of the foundation pit and bury one end of the steel pipe in it. The soil plate at the bottom increases the contact area between the bottom of the steel pipe and the foundation, dispersing the pressure from above on the steel pipe, making it more difficult for the steel pipe to be pulled out or moved in the foundation. The reinforcing bars increase the strength and integrity of the connection between the soil plate and the steel pipe. Pour concrete into the hole and the inside of the steel pipe. After the concrete solidifies, it firmly wraps the steel pipe, soil plate and reinforcing bars together, making the steel pipe tightly integrated with the surrounding foundation into a whole. This enhances the anchoring force of the steel pipe in the hole, enabling it to better withstand the soil pressure transmitted from the support plate, thereby improving the compressive strength of the entire foundation pit support device.

[0027] 2. The guide rails on both sides of the steel pipe provide a clear installation position and guide, enabling the support plate to be installed quickly and accurately between adjacent steel pipes, thus improving construction efficiency. The support plate is inserted into the guide rail, forming a reliable connection between the support plate and the steel pipe, enhancing the stability of the support plate when resisting soil pressure, preventing the support plate from shaking or falling off, and thus improving the reliability of the entire foundation pit support structure.

[0028] 3. The transverse support beams can effectively constrain the deformation of the support plate in the transverse direction, preventing the support plate from bending or becoming unstable due to excessive transverse force, and ensuring that the support plate can continuously and stably support the side wall of the foundation pit; the diagonal bracing beams connect the transverse support beams to the inner wall of the foundation pit, forming a stable support system, improving the compressive strength and stability of the entire foundation pit support device, and reducing the risk of foundation pit collapse.

[0029] 4. The transverse support beam adopts a concave-convex shape to match the surface contour of the corrugated support plate, so that the two can fit tightly together, avoiding connection gaps and local stress concentration caused by shape mismatch, enhancing the connection effect between the transverse support beam and the support plate, effectively resisting the soil pressure of the foundation pit sidewall, reducing the risk of support plate deformation or transverse support beam displacement, and ensuring the safety of the foundation pit support structure during construction.

[0030] 5. By using multiple mounting holes on the transverse support beam and fixing holes on the diagonal brace beam, the diagonal brace beam can be fixed at different positions on the transverse support beam by inserting and removing fastening bolts. This allows for precise adjustment of the angle and position of the diagonal brace beam, meeting the support structure requirements of different foundation pit conditions. Attached Figure Description

[0031] Figure 1 This is a first three-dimensional structural schematic diagram of this utility model;

[0032] Figure 2 This is a schematic diagram of the second three-dimensional structure of this utility model;

[0033] Figure 3 This is a partial three-dimensional structural diagram of the reinforcement structure of this utility model;

[0034] Figure 4 This is a three-dimensional structural diagram of the reinforcement structure of this utility model;

[0035] Figure 5 This is a cross-sectional view of the reinforcement structure of this utility model;

[0036] Figure 6 This is a three-dimensional structural diagram of the adjustment component of this utility model;

[0037] The attached diagram is labeled as follows: 1. Steel pipe; 2. Support plate; 3. Reinforcing structure; 31. Buried hole; 32. Soil plate; 33. Reinforcing rib; 34. Concrete; 4. Guide rail; 5. Wavy shape; 6. Transverse support beam; 7. Diagonal brace beam; 8. Concave-convex shape; 9. Adjustment component; 91. Mounting hole; 92. Fixing hole; 93. Fastening bolt. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0039] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0040] Example 1:

[0041] like Figure 1 , Figure 3 and Figure 4 As shown, this embodiment provides a foundation pit support device, including:

[0042] Steel pipe 1 is vertically embedded in the foundation of the inner wall of the foundation pit, and the upper part of steel pipe 1 is located on the surface of the foundation pit.

[0043] Support plate 2, multiple vertically arranged support plates 2, are set between two adjacent steel pipes 1 and are used to support the side wall of the foundation pit;

[0044] Reinforcing structure 3, installed on steel pipe 1, is used to enhance the compressive strength of the support device;

[0045] The reinforced structure 3 includes:

[0046] The buried hole 31 is excavated downward along the bottom of the foundation pit, and one end of the steel pipe 1 is buried in the buried hole 31;

[0047] A soil plate 32 is set at the bottom of the steel pipe 1, and the outer diameter of the soil plate 32 is the same as the inner diameter of the buried hole 31.

[0048] Reinforcing ribs 33 are provided between the soil plate 32 and the steel pipe 1. There are multiple reinforcing ribs 33, which are evenly distributed along the circumferential direction.

[0049] Concrete 34 is poured into the hole 31 and inside the steel pipe 1. The soil plate 32 expands the size of the bottom of the steel pipe 1. The concrete 34 is poured into the hole 31 so that the soil plate 32 on the steel pipe 1 is fixed in the hole 31, which is used to enhance the anchoring force of the steel pipe 1 in the hole 31.

[0050] In this technical solution, steel pipe 1 is vertically buried in the foundation of the pit wall. The cooperation between steel pipe 1 and support plate 2 provides reliable support for the pit sidewall, preventing the support plate 2 from tipping over under soil pressure from the pit's perimeter, thus avoiding pit collapse and ensuring the safety of underground structure construction and the surrounding environment. A specific reinforcement structure 3 is installed to enhance the anchoring force and overall stability of steel pipe 1 in the foundation from multiple aspects, thereby improving the entire pit support device's ability to resist soil pressure. Especially in extreme situations such as pit collapse, it effectively prevents support structure failure due to insufficient compressive strength.

[0051] Working principle: Steel pipe 1 is vertically buried in the foundation wall of the excavation pit, with its upper part exposed above the pit surface. Multiple vertical support plates 2 are installed between adjacent steel pipes 1. When the soil around the pit applies pressure to the support plates 2, the support plates 2 transfer the pressure to the connected steel pipes 1. The steel pipes 1, anchored in the foundation, work together with the support plates 2 to resist the pressure and maintain the stability of the pit sidewall. A burial hole 31 is excavated downwards along the bottom of the pit, and one end of the steel pipe 1 is buried in it. The outer diameter of the soil plate 32 at the bottom is the same as the inner diameter of the burial hole 31. Before pouring concrete 34, the soil plate 32 can initially position the steel pipe 1, keeping it in a relatively stable position in the burial hole 31. After pouring concrete 34, the soil plate 32 increases the contact area between the bottom of the steel pipe 1 and the foundation, dispersing the pressure from above on the steel pipe 1, making it more difficult to pull out or move the steel pipe 1 in the foundation. Multiple reinforcing ribs 33 are evenly spaced circumferentially between the soil plate 32 and the steel pipe 1, increasing the strength and integrity of the connection between the soil plate 32 and the steel pipe 1. Under pressure, the reinforcing ribs 33 work together with the soil plate 32 and the steel pipe 1 to prevent relative displacement or breakage at the connection, further enhancing the stability of the steel pipe 1 in the foundation. Concrete 34 is poured into the borehole 31 and the steel pipe 1. After the concrete 34 solidifies, it firmly encapsulates the steel pipe 1, the soil plate 32, and the reinforcing ribs 33, filling the gaps within the borehole 31 and tightly integrating the steel pipe 1 with the surrounding foundation. This significantly enhances the anchorage force of the steel pipe 1 in the borehole 31, enabling it to better withstand the soil pressure transmitted from the support plate 2, thereby improving the compressive strength of the entire foundation pit support device.

[0052] like Figures 1-4 As shown, in this embodiment, the steel pipe 1 is optimized with guide rails 4 on both the left and right sides, and the support plate 2 is set between two adjacent guide rails 4, and the support plate 2 is inserted into the guide rail 4.

[0053] In this technical solution, guide rails 4 are installed on both sides of the steel pipe 1, providing a clear installation position and guide for the support plate 2. This allows the support plate 2 to be installed quickly and accurately between adjacent steel pipes 1, improving construction efficiency while ensuring the neatness and stability of the support plate 2 installation. The support plate 2 is inserted into the guide rails 4, forming a reliable connection between the support plate 2 and the steel pipe 1. This effectively transmits the pressure of the surrounding soil on the support plate 2, enhancing its stability against soil pressure, preventing it from shaking or falling off, and thus improving the reliability of the entire foundation pit support structure.

[0054] Working Principle: When installing the support plate 2, construction workers insert the support plate 2 along the guide rails 4 on both sides of the steel pipe 1. The guiding function of the guide rails 4 ensures that the support plate 2 can accurately reach the predetermined position, eliminating the need for complex measurement and positioning operations and simplifying the installation process. Because the guide rails 4 restrict the horizontal movement freedom of the support plate 2, the support plate 2 can be tightly installed between adjacent steel pipes 1, ensuring the accuracy and stability of the support plate 2 installation. When the soil around the foundation pit applies pressure to the support plate 2, the pressure is transmitted to the steel pipe 1 through the insertion point because the support plate 2 is inserted into the guide rails 4. The tight fit between the guide rails 4 and the support plate 2 makes the pressure transmission process stable and efficient. After receiving the pressure transmitted by the support plate 2, the steel pipe 1 further disperses the pressure into the foundation through its own anchoring structure, thereby effectively resisting the pressure of the soil on the sidewall of the foundation pit and maintaining the stability of the foundation pit support structure.

[0055] like Figure 6 As shown, in this embodiment, the optimized support plate 2 is a steel sheet pile, and its cross-section is wavy 5.

[0056] In this technical solution, steel sheet piles are used as the support plate 2. Utilizing the high strength and toughness of steel, they can effectively withstand the pressure of the soil on the sidewalls of the foundation pit, enhancing the support capacity, reducing the risk of pit collapse, and ensuring construction safety. The steel sheet piles have a wavy cross-section 5. This unique shape increases the interlocking area and tightness between the sheet piles. When subjected to soil pressure, adjacent sheet piles can work together better, reducing deformation or displacement caused by uneven local stress and improving the stability of the entire support structure. The wavy cross-section 5 makes the connection between the sheet piles tighter, forming a better sealing effect, effectively preventing groundwater from seeping into the foundation pit, reducing water accumulation in the pit, and creating a relatively dry working environment for underground structure construction.

[0057] Working Principle: Sheet piles are made of steel, which possesses excellent tensile, compressive, and shear strength. When the surrounding soil of the foundation pit applies pressure to the retaining plate 2, the sheet piles, due to their high strength, can resist the lateral pressure of the soil, are not prone to deformation or breakage, and transfer the soil pressure to the connected steel pipe 1 and the entire retaining structure, thereby achieving effective support for the sidewall of the foundation pit. The wavy cross-section 5 of the sheet piles allows them to interlock tightly. When subjected to soil pressure, the interlocking parts can transfer and disperse stress, allowing adjacent sheet piles to share the pressure and avoiding local stress concentration. This collaborative working mechanism enhances the overall ability of the retaining structure to resist soil deformation and maintains the stability of the foundation pit sidewall. Due to the special structure of the wavy cross-section 5, after the sheet piles interlock, a continuous and tight sealing structure is formed at their contact points. When groundwater encounters this tight connection structure during seepage, it is difficult to enter the foundation pit through the gaps between the sheet piles, thus preventing groundwater leakage.

[0058] Example 2:

[0059] This embodiment provides a foundation pit support device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0060] like Figure 2 and Figure 6 As shown, in this embodiment, the support plate 2 is optimized by having a transverse support beam 6 on its surface. The transverse support beam 6 is used to enhance the transverse stability of the support plate 2. One end of the transverse support beam 6 is provided with a diagonal brace 7, and the other end of the diagonal brace 7 is connected to the inner wall of the pit to resist the pressure of the soil on the support plate 2.

[0061] In this technical solution, a transverse support beam 6 is installed, which effectively constrains the deformation of the support plate 2 in the transverse direction, improves the support plate 2's ability to resist horizontal loads (such as lateral soil pressure), prevents the support plate 2 from bending or becoming unstable due to excessive lateral force, and ensures that the support plate 2 can continuously and stably support the sidewall of the foundation pit. The transverse support beam 6 is connected to the inner wall of the foundation pit by a diagonal brace beam 7, constructing a stable support system. This system can effectively transfer and disperse the pressure of the soil on the support plate 2 from the inner wall of the foundation pit, enabling the overall support structure to better withstand soil pressure, improving the compressive strength and stability of the entire foundation pit support device, and reducing the risk of foundation pit collapse.

[0062] Working Principle: When the soil on the inner wall of the foundation pit applies lateral pressure to the support plate 2, the support plate 2 tends to deform laterally. The lateral support beam 6 is connected to the support plate 2, and its own bending stiffness can limit the lateral displacement and deformation of the support plate 2. The lateral support beam 6 distributes the lateral pressure on the support plate 2 onto its own structure, and through its connection with the diagonal brace beam 7, it further transmits the pressure to the entire support structure system, thereby enhancing the lateral stability of the support plate 2. One end of the diagonal brace beam 7 is connected to the lateral support beam 6, and the other end is connected to the inner wall of the foundation pit. When subjected to soil pressure, the diagonal brace beam 7, together with the lateral support beam 6 and the inner wall of the foundation pit, constitute a stable structure. This structure can decompose the soil pressure acting on the support plate 2 into pressure along the axial direction of the diagonal brace beam 7 and components in other directions. The diagonal bracing beam 7 transmits the axial pressure to the inner wall of the pit, using the bearing capacity of the soil in the pit to resist the pressure. At the same time, the transverse support beam 6 also transmits some of the pressure to other support components such as the steel pipe 1, realizing the dispersion and transmission of pressure, and together resisting the pressure of the soil in the inner wall of the pit on the support plate 2, maintaining the stability of the pit support structure.

[0063] like Figure 2 and Figure 6 As shown, in this embodiment, the optimized transverse support beam 6 is a steel beam, and the surface of the transverse support beam 6 that abuts against the support plate 2 is concave-convex 8 to adapt to the wavy 5 structure of the support plate 2.

[0064] In this technical solution, the transverse support beam 6 adopts a concave-convex shape 8, which matches the surface contour of the corrugated support plate 2 5, allowing the two to fit tightly together. This avoids connection gaps and local stress concentrations caused by shape mismatch, enhancing the connection effect between the transverse support beam 6 and the support plate 2. Steel beams are selected as the transverse support beam 6, utilizing the high strength and high toughness of steel to improve its load-bearing capacity. The concave-convex shape 8 increases the contact area between the two, allowing the soil pressure on the support plate 2 to be transferred more evenly and efficiently to the transverse support beam 6, thereby improving the compressive strength and stability of the entire support structure. The tight fit allows the transverse support beam 6 and the support plate 2 to work together under stress, forming a more stable overall structure that effectively resists soil pressure on the pit sidewalls, reduces the risk of deformation of the support plate 2 or displacement of the transverse support beam 6, and ensures the safety of the pit support structure during construction.

[0065] Working Principle: The surface of the transverse support beam 6 that abuts against the support plate 2 is concave-convex (8), complementing the surface contour of the corrugated support plate 2 (5). During installation, the protruding part of the transverse support beam 6 is embedded in the groove of the support plate 2, and the groove accommodates the protrusion of the support plate 2. This interlocking connection ensures a tight fit between the two. Compared to planar contact, the concave-convex (8) contact surface significantly increases the contact area while reducing the connection gap, effectively avoiding stress concentration caused by gaps and making the connection between the transverse support beam 6 and the support plate 2 more stable. When the soil on the sidewall of the pit applies pressure to the support plate 2, due to the tight fit and large contact area between the transverse support beam 6 and the support plate 2, the pressure can be evenly transmitted to the transverse support beam 6 through the concave-convex (8) contact surface. The steel beam, with its high strength and good mechanical properties, can withstand and disperse these pressures. The transverse support beam 6 then transmits the pressure to the inner wall of the pit through the diagonal bracing beam 7, or disperses the pressure throughout the entire support structure system through connections with other components such as the steel pipe 1. This efficient force transmission mechanism ensures that the support structure can work collaboratively under stress, enhancing its overall compressive strength. Throughout the stress process, the closely fitted transverse support beam 6 and the support plate 2 form a cohesive whole. When the support plate 2 undergoes slight deformation under soil pressure, the transverse support beam 6 responds promptly and provides support force, limiting the deformation of the support plate 2. Conversely, when the transverse support beam 6 deforms under stress, the support plate 2 also provides a reaction force. The two interact to jointly resist soil pressure, maintain the stability of the foundation pit support structure, and effectively ensure the safety of foundation pit construction.

[0066] Example 3:

[0067] This embodiment provides a foundation pit support device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0068] likeFigure 2 and Figure 6 As shown, in this embodiment, an adjustment component 9 is also included in the optimization. The adjustment component 9 is disposed at the connection between the transverse support beam 6 and the diagonal brace beam 7, and is used to adjust the relative position of the diagonal brace beam 7 and the transverse support beam 6 to adapt to different foundation pit working conditions.

[0069] In this technical solution, the relative positions of the diagonal bracing beam 7 and the transverse support beam 6 are adjusted by the adjusting component 9, allowing the foundation pit support structure to be flexibly adjusted according to different foundation pit depths, shapes, geological conditions, and surrounding environments. This ensures that the support structure achieves optimal support performance under various complex conditions. Under different foundation pit conditions, the magnitude and direction of soil pressure vary. The adjusting component 9 can change the position of the diagonal bracing beam 7, thereby optimizing the stress distribution of the entire support structure, enabling each component to more rationally share the load, avoiding local stress concentration, and improving the overall stability and compressive strength of the support structure. During foundation pit construction, the foundation pit conditions may change as construction progresses. The adjusting component 9 allows construction personnel to easily adjust the support structure in a timely manner according to the actual situation, reducing redesign and construction costs caused by changes in conditions, and improving construction efficiency and economy.

[0070] like Figure 2 and Figure 6 As shown, in this embodiment, the optimized adjustment component 9 includes:

[0071] Mounting holes 91 are provided on the transverse support beam 6. There are multiple mounting holes 91, which are evenly spaced along the length of the transverse support beam 6.

[0072] Fixing hole 92 is provided on the diagonal brace beam 7, and the fixing hole 92 on the diagonal brace beam 7 is matched with the mounting hole 91 on the transverse support beam 6;

[0073] Fastening bolts 93 are inserted between fixing holes 92 and suitable mounting holes 91 to fix the diagonal brace beam 7 to the appropriate position on the transverse support beam 6.

[0074] In this technical solution, multiple evenly spaced mounting holes 91 are provided on the transverse support beam 6, which cooperate with the fixing holes 92 on the diagonal brace beam 7. By inserting and removing the fastening bolts 93, the diagonal brace beam 7 can be fixed at different positions on the transverse support beam 6, thereby precisely adjusting the angle and position of the diagonal brace beam 7 to meet the requirements of different foundation pit conditions for the support structure. The fastening bolts 93 firmly connect the diagonal brace beam 7 and the transverse support beam 6, ensuring a stable relative position when subjected to the pressure of the foundation pit soil. This prevents support structure failure due to loose connections, ensuring that the adjusted support structure can reliably transfer and distribute loads, maintaining the stability of the foundation pit. The adjustment component 9 has a simple structure, requiring no complex mechanical equipment or professional technology. Construction personnel can adjust the position of the diagonal brace beam 7 simply through conventional bolt installation and removal operations, reducing construction difficulty, improving construction efficiency, and facilitating flexible adjustments later according to changes in foundation pit conditions.

[0075] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A foundation pit support device, characterized in that, include: Steel pipe (1), the steel pipe (1) is vertically buried in the foundation of the pit, and the upper part of the steel pipe (1) is located on the surface of the pit; Support plate (2), multiple vertically arranged support plates (2), are set between two adjacent steel pipes (1) for supporting the side wall of the foundation pit; A reinforcing structure (3) is installed on the steel pipe (1) to enhance the compressive strength of the support device; The aforementioned reinforced structure (3) includes: The buried hole (31) is excavated downward along the bottom of the foundation pit, and one end of the steel pipe (1) is buried in the buried hole (31); A soil plate (32) is set at the bottom of the steel pipe (1), and the outer diameter of the soil plate (32) is the same as the inner diameter of the buried hole (31); A reinforcing rib (33) is provided between the soil plate (32) and the steel pipe (1). There are multiple reinforcing ribs (33), which are evenly spaced along the circumferential direction. Concrete (34) is poured into the hole (31) and the steel pipe (1). The soil plate (32) expands the size of the bottom of the steel pipe (1). The concrete (34) is poured into the hole (31) so that the soil plate (32) on the steel pipe (1) is fixed in the hole (31) to enhance the anchoring force of the steel pipe (1) in the hole (31).

2. The foundation pit support device according to claim 1, characterized in that, The steel pipe (1) is provided with guide rails (4) on both the left and right sides. The support plate (2) is set between two adjacent guide rails (4) and the support plate (2) is inserted into the guide rail (4).

3. The foundation pit support device according to claim 2, characterized in that, The support plate (2) is a steel sheet pile, and its cross section is wavy (5).

4. The foundation pit support device according to claim 3, characterized in that, The surface of the support plate (2) is provided with a transverse support beam (6), which is used to enhance the transverse stability of the support plate (2); one end of the transverse support beam (6) is provided with a diagonal brace (7), and the other end of the diagonal brace (7) is connected to the inner wall of the pit to resist the pressure of the soil on the support plate (2) from the inner wall of the pit.

5. A foundation pit support device according to claim 4, characterized in that, The transverse support beam (6) is a steel beam, and the surface of the transverse support beam (6) that abuts against the support plate (2) is concave-convex (8) to adapt to the wave-shaped (5) structure of the support plate (2).

6. The foundation pit support device according to claim 4, characterized in that, It also includes an adjustment component (9), which is located at the connection between the transverse support beam (6) and the diagonal brace beam (7) to adjust the relative position of the diagonal brace beam (7) and the transverse support beam (6) to adapt to different foundation pit working conditions.

7. A foundation pit support device according to claim 6, characterized in that, The adjustment component (9) includes: Mounting holes (91) are provided on the transverse support beam (6). There are multiple mounting holes (91) and they are evenly spaced along the length of the transverse support beam (6). A fixing hole (92) is provided on the diagonal brace (7), and the fixing hole (92) on the diagonal brace (7) is matched with the mounting hole (91) on the transverse support beam (6); Fastening bolts (93) are inserted between the fixing hole (92) and the appropriate mounting hole (91) to fix the diagonal brace (7) in a suitable position on the transverse support beam (6).

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