Foundation pit support structure with construction platform

Abstract

The utility model provides a kind of foundation pit supporting structure with construction platform, by construction platform and foundation pit share lattice column pile as supporting structure, the problem of repeated construction of existing foundation pit support and platform erection, resource waste, low space utilization and insufficient construction efficiency is solved. By innovative group lattice column pile, support system bears foundation pit supporting function, and directly bears platform load, realizes that construction platform and foundation pit supporting structure cooperate stress, greatly promotes structural stability and construction safety.

Description

Technical Field

[0001] This utility model relates to the field of engineering construction, and in particular to a foundation pit support structure with a construction platform. Background Technology

[0002] In traditional construction support structures, the columns of the foundation pit support structure and the columns of the construction platform are usually set up separately and independently. This design has many drawbacks. More space needs to be reserved on the construction site, and each support structure requires a dedicated column, significantly reducing space utilization. At the same time, multiple columns mean more material consumption and installation costs, resulting in a high overall project cost. There is a lack of organic integration between support structures with different functions, and the connections between structural components are complex, making it difficult to achieve a compact and efficient support system design. The space occupation problem of traditional support structures is particularly prominent in confined construction sites. Each additional column significantly increases construction difficulty and economic burden.

[0003] Existing support structures generally suffer from insufficient flexibility. These support systems are difficult to adjust and reuse quickly in different engineering scenarios, exhibiting poor adaptability. To meet the specific needs of different projects, construction companies often have to redesign and build entirely new support systems, which not only increases costs but also extends the construction period. These inherent defects of traditional construction support structures severely restrict the efficiency and economy of engineering construction, urgently requiring an innovative support solution that can optimize space utilization, reduce costs, and improve flexibility. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the technical problem to be solved by this utility model is to provide a foundation pit support structure with a construction platform, which addresses the problems of low construction space utilization, high material consumption, high installation cost and insufficient flexibility caused by the separate setting of column piles and lattice columns in traditional construction support structures.

[0005] To achieve the above objectives, this utility model provides a foundation pit support structure with a construction platform, installed within the foundation pit, comprising: a peripheral support structure installed at the edge of the foundation pit; an internal support structure installed within the foundation pit, including a plurality of column piles, a plurality of lattice columns with one end inserted into the column piles, and horizontal supports, the middle part of the horizontal supports being installed on the lattice columns, and its ends being connected to the peripheral support structures on both sides of the foundation pit; and a platform structure, the platform structure including a main beam, a bridge deck, and a plurality of crossbeams, one end of the crossbeams being installed on the top of the peripheral support structure of the foundation pit, and the other end being installed on the top of the main beam, the main beam being installed on the top of the lattice columns, and the bridge deck being laid on the plurality of crossbeams.

[0006] Preferably, the main beam includes a group of Bailey panels and a pergola; both ends of the main beam are fixed to the top of the common column by welding end cap steel plates.

[0007] Preferably, the Bailey plate and the flower stand are detachably connected by a pin.

[0008] Preferably, the crossbeam is a steel crossbeam; one end of the crossbeam rests on the main beam, and the other end overlaps the pile top of the inner support structure.

[0009] More preferably, the peripheral support structure includes a plurality of cast-in-place piles disposed at the edge of the foundation pit, and a capping beam disposed at the top of the cast-in-place piles, with one end of the crossbeam disposed on the capping beam.

[0010] More preferably, the ends of the horizontal support are fixed to a plurality of the walers.

[0011] More preferably, the horizontal support is a concrete support.

[0012] Preferably, the beams are parallel to each other and are spaced at equal intervals.

[0013] Preferably, the top of the column of the supporting structure is welded with a cap steel plate, and the side is provided with a corbel steel plate to reinforce the connection between the supporting structure and the main beam.

[0014] Preferably, the platform structure is provided with guardrails on both sides, the guardrails include guardrail posts and guardrail crossbars, and the guardrail posts are fixedly connected to the crossbars.

[0015] As described above, the foundation pit support structure with a construction platform involved in this utility model has the following beneficial effects: By sharing lattice piles as supports with the foundation pit support structure, the support system and platform structure are integrated, which not only saves structural components and space resources, but also greatly simplifies the construction process and improves the overall construction efficiency. Compared with traditional platform systems, there is no need to repeat the construction of piles, reducing construction steps and on-site work intensity, allowing projects to proceed more quickly and smoothly. At the same time, due to the reduction in the amount of structural materials used and the optimization of construction procedures, the overall project cost is effectively controlled, demonstrating good economic efficiency. The platform and the support structure form a collaborative force-bearing system, further improving the stability and safety of the project, which is conducive to ensuring the safety of the foundation pit slope and the working platform. In addition, the platform is more efficient and convenient to erect and dismantle, meeting the complex construction requirements such as limited foundation pit space and tight schedules, and is applicable to foundation pits and underground projects of various types and scales, with broad applicability and promotion prospects. Overall, this invention provides a new, efficient, economical, environmentally friendly, and reliable technical solution for the design and construction of foundation pit support and construction platforms. Attached Figure Description

[0016] Figure 1 This paper shows a schematic diagram of a common support structure in one embodiment of the foundation pit support structure with construction platform of this application.

[0017] Figure 2 Showing Figure 1 A magnified view of a portion of point A in the middle.

[0018] Figure 3 The diagram shows a schematic of a common support structure and its construction platform in one embodiment of the foundation pit support structure with construction platform of this application.

[0019] Figure 4 The image shows a top view of a common support structure and its construction platform in one embodiment of the foundation pit support structure with construction platform of this application.

[0020] Component designation explanation

[0021] 1. Peripheral support structure

[0022] 11 Cast-in-place piles

[0023] 12 Crown Beams

[0024] 2 Internal support structure

[0025] 21. Column piles

[0026] 211 End cap steel plate

[0027] 212 Bracket Steel Plate

[0028] 22 lattice columns

[0029] 23 Horizontal Support

[0030] 24. Purlins

[0031] 3 Platform Structure

[0032] 31 Bridge deck

[0033] 32 crossbeams

[0034] 33 Main Beam

[0035] 34 Guardrail Detailed Implementation

[0036] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0037] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed in this utility model. The following detailed description should not be considered restrictive, and the scope of the embodiments of this application is limited only by the claims of the published patents. The terminology used herein is for describing specific embodiments only and is not intended to limit this application. Spatial terms such as "upper," "lower," "left," "right," "below," "below," "lower part," "above," "upper part," etc., may be used in the text to illustrate the relationship between one element or feature shown in the figures and another element or feature.

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "holding" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” indicate the presence of the stated feature, operation, element, component, item, kind, and / or group, but do not preclude the presence, occurrence, or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition arise only when combinations of elements, functions, or operations are inherently mutually exclusive in some manner.

[0040] Before providing a further detailed description of this utility model, the nouns and terms used in the embodiments of this utility model are explained, and the nouns and terms used in the embodiments of this utility model are subject to the following interpretations:

[0041] <1> Foundation pit: A foundation pit is a pit dug in the ground to meet the construction needs of a building project, in order to achieve the designed foundation depth. It is a key part of the foundation construction of a building.

[0042] <2> Column piles: Column piles are vertically arranged pile foundation structures used to support columns in the superstructure and transfer the load to the foundation soil layer with strong bearing capacity.

[0043] <3> Lattice column piles: Lattice column piles consist of steel columns and lattice trusses, possessing the characteristics of pile foundations, and are mainly used to improve the stability and load-bearing capacity of structures.

[0044] <4> Main beam: The main beam is a transverse load-bearing component that bears the main span load. It connects the columns and secondary beams and is responsible for transferring the load to the supporting structure.

[0045] <5> Crossbeams: Crossbeams are components that connect the main beams and columns. They are usually perpendicular to the direction of the main beams and bear and support components such as bridge decks or walls.

[0046] <6> Bailey panels: Bailey panels are structural support materials made of steel plates, often in the shape of shells, used for temporary or permanent support of structures such as scaffolding and bridges.

[0047] <7> Flower stand: A flower stand is a frame-type support structure, mainly used to support upper components or equipment, and plays a stabilizing role.

[0048] <8> End cap steel plate: End cap steel plate is a steel plate used to seal the opening of pipes or containers. It is often used for the closed end of steel pipe piles or for sealing the mouth of vessels.

[0049] <9> Bracket plate: A bracket plate is a steel structural member that protrudes from the bottom of a wall or beam to bear and transfer local loads, similar to the function of a support.

[0050] <10> Waler: A waler is a horizontal beam placed between columns, which bears and transmits the load of roof purlins or wall components.

[0051] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the invention.

[0052] like Figures 1 to 4As shown, this utility model provides a foundation pit support structure with a construction platform, set inside the foundation pit, including: a peripheral support structure 1 set at the edge of the foundation pit; an internal support structure 2 set inside the foundation pit, including a plurality of column piles 21, a plurality of lattice columns 22 with one end inserted into the column piles 21, and a horizontal support 23, the middle part of the horizontal support 23 is set on the lattice columns 22, and its ends are respectively connected to the peripheral support structure 1 on both sides of the foundation pit; a platform structure 3, the platform structure 3 including a main beam 33, a bridge deck 31, and a plurality of crossbeams 32, one end of the crossbeam 32 is set on the top of the foundation pit peripheral support structure 1, and the other end is set on the top of the main beam 33, the main beam 33 is mounted on the top of the lattice columns 22, and the bridge deck 31 is laid on the plurality of crossbeams 32.

[0053] The foundation pit support structure with construction platform involved in this embodiment is applicable to structural platforms made of various materials, including but not limited to concrete structural platforms and steel structural platforms. Preferably, a steel structural platform is used to reduce construction pollution and energy consumption, and to increase the turnover rate of steel, thereby reducing project costs.

[0054] The existing construction platform setup process first involves building a support system to support the foundation pit. This support system is a vertical support system, consisting of upper lattice columns 22 and lower piles 21. The lattice columns 22 bear the vertical load transmitted from the horizontal supports 23 to maintain the stability of the foundation pit. The lower piles 21 transfer the load from the lattice columns 22 to the bottom of the foundation pit. Subsequently, the piles 21 supporting the construction platform are erected within the foundation pit. However, constructing the support platform and the foundation pit piles 21 separately not only increases the project cost but also occupies a significant amount of ground construction space, affecting the placement of construction materials and the movement of construction vehicles.

[0055] To address the aforementioned problems in the existing technology, this application creatively proposes using lattice columns 22 as a shared support structure for both the construction platform and the foundation pit, thereby avoiding the problem of redundant construction of column piles 21. Specifically, the column piles 21 serve as vertical support points for both the platform and the foundation pit, with the lattice columns 22 inserted within them to form a connection. A horizontal support structure 23 is located in the middle of the lattice columns 22 and connects to the surrounding support structures 1 on both sides of the foundation pit. The platform load and the supporting pressure of the surrounding soil are transmitted to the surrounding support structures 1 through the same lattice column 22 and column pile 21 support structure. While bearing their respective loads, the column piles 21 and lattice columns 22 also provide auxiliary support to the surrounding support structures 1.

[0056] In this embodiment, the platform structure 3 consists of one or more components, including steel pipe columns, column top beams, main beams 33, crossbeams 32, bridge deck 31, and guardrails 34. When using the shared lattice column 22 support structure of this application, a group of 321 Bailey bridge main beams 33 is used, and steel crossbeams 32 and bridge deck steel plates are laid on top of the 321 Bailey bridge main beams 33. One end of the steel crossbeam 32 rests on the Bailey bridge main beam 33, and the other end directly overlaps the pile top of the peripheral support structure 1 at the edge of the foundation pit. This support structure reduces the use of column piles 21 and Bailey bridge main beams 33 compared to traditional steel platforms, significantly reducing the cost of the construction platform.

[0057] During installation, a suitable main beam 33 was selected based on the spacing of the shared column piles 21, and then spliced ​​together to form an assembly. To ensure structural stability, the selected main beam 33 was a multiple of 3 meters in length. At the edge of the foundation pit, hoisting equipment was used to lift the main beam 33 onto the columns, and gantry clamps were used for welding connections to ensure its stability and safety.

[0058] Preferably, the main beam 33 includes a group of Bailey panels and a pergola; both ends of the main beam 33 are fixed to the top of the common column by welding end cap steel plates 211.

[0059] For example, the Bailey bridge section in this embodiment can be a type 321 Bailey bridge section. The type 321 Bailey bridge section has a trapezoidal cross-section and is composed of an upper chord, a lower chord, and several web members, forming a sturdy triangular grid structure. The flower stand in this embodiment can be a type 900 flower stand.

[0060] Preferably, the Bailey plate and the flower stand are detachably connected by a pin.

[0061] In this embodiment, the 321 Bailey beam in the main beam 33 structure is connected to the 900-type flower rack via a pin, which is inserted into the pre-drilled holes in the Bailey beam and the flower rack. Furthermore, the crossbars on the main beam 33 are spot-welded to the steel crossbeam 32 using fish-mouth clamps. Specifically, one end of the fish-mouth clamp is open, and the other end is closed, allowing it to tightly hold the steel crossbeam 32 and the crossbars on the main beam 33. During installation, the open end of the fish-mouth clamp is fitted onto the steel crossbeam 32, and then its closed end is aligned with the crossbar on the main beam 33 and fixed by spot welding.

[0062] Preferably, the crossbeam 32 is a steel crossbeam 32; one end of the crossbeam 32 rests on the main beam 33, and the other end overlaps the pile top of the inner support structure 2.

[0063] In this embodiment, the crossbeam 32 is a steel crossbeam 32, which is a steel component with a specific cross-sectional shape, preferably an H-beam. Using hoisting equipment, one end of the H-beam 32 is securely placed on the main beam 33, while the other end is connected to the top of the piles of the inner support structure 2. To ensure the stability of the connection, it is further preferred that the end of the crossbeam 32 overlaps the top of the foundation pit cap beam 12, and is connected using one or more of various connection methods such as welding, bolting, or clamping, to enhance the stability and load-bearing capacity of the entire structure.

[0064] Preferably, the peripheral support structure 1 includes a plurality of cast-in-place piles 11 disposed at the edge of the foundation pit, and a capping beam 12 disposed on the top of the cast-in-place piles 11, with one end of the crossbeam 32 disposed on the capping beam 12.

[0065] In this embodiment, the cast-in-place piles 11 are several support columns set at the edge of the foundation pit, and the capping beam 12 is a continuous beam set on top of the cast-in-place piles 11 to connect the cast-in-place piles 11 into a whole, thereby enhancing the stability of the surrounding support structure 1 and preventing the top edge of the foundation pit from collapsing. One end of the crossbeam 32 is set on the capping beam 12 and connected to the support structure through the capping beam 12, thereby transferring the load borne by the crossbeam 32 to the entire support structure.

[0066] Preferably, the ends of the horizontal support 23 are fixed to a plurality of the walers 24.

[0067] In this embodiment, the horizontal support 23 is used to support the lateral pressure on the soil of the foundation pit sidewall to ensure the stability of the foundation pit. The arrangement of the horizontal support 23 includes, but is not limited to, bracing, corner bracing, and ring bracing. The waler 24 is a locking beam set on the top of the peripheral support structure 1 to connect the peripheral support structure 1 into a whole and transfer the load between them. The horizontal support 23 is a concrete support.

[0068] Preferably, the crossbeams 32 are parallel to each other and are spaced at the same intervals.

[0069] In this embodiment, the crossbeams 32 are arranged in parallel to achieve uniform load distribution, thereby reducing local stress and maintaining consistent stress on each crossbeam 32. Preferably, the crossbeams 32 can be H-beams with dimensions of 700×300×13×24 mm, with a 10 mm thick checkered steel plate laid on top as the bridge deck 31. The checkered steel plate not only provides additional load-bearing surface but also improves the friction characteristics of the contact surface, enhancing the overall structural stability.

[0070] Preferably, the top of the column of the supporting structure is welded with a capping steel plate 211 and the side is provided with a corbel steel plate 212 to reinforce the connection between the supporting structure and the main beam 33.

[0071] In this embodiment, a capping steel plate 211 is provided at the top of the column, and a corbel steel plate 212 is installed on the side, which are tightly connected to the steel column by welding. The capping steel plate 211 is a flat metal component that closes the top of the column, and the corbel steel plate 212 is an L-shaped or similar support-like steel plate, mainly used to enhance the connection strength. To further optimize the connection between the support structure and the main beam 33, this invention uses 8-channel steel to make a portal-type limiting device, which is welded to the capping steel plate 211. When the main beam 33 is subjected to external force and attempts to move horizontally or vertically, the portal-type limiting device will generate a reverse constraint force, thereby restricting its movement and effectively limiting the horizontal movement and vertical deflection of the main beam 33. For example, the corbel steel plate 212 has dimensions of 400mm × 400mm, and the capping steel plate 211 has dimensions of 1300mm × 1300mm.

[0072] Preferably, the platform structure 3 is provided with guardrails 34 on both sides. The guardrails 34 include guardrail posts and guardrail crossbars. The guardrail posts are fixedly connected to the crossbeams 32.

[0073] In this embodiment, the guardrail posts 34 are vertically arranged column-shaped safety protection components, which are welded to the crossbeams 32. The guardrail posts 34 and the crossbeams 34 are horizontally arranged rod-shaped safety protection components.

[0074] The foundation pit support structure with construction platform provided in this application includes the following construction process: When using the "fishing method" to build the construction platform, the column piles 21 are constructed first, and the lattice columns 22 can be fabricated in the later stage. Before the concrete in the column piles 21 has solidified, the fabricated lattice columns 22 are inserted to form a whole. After the cast-in-place piles 11, column piles 21, lattice columns 22 and cap beams 12 are completed, the earthwork is excavated to the top elevation of the lattice columns 22, and corbel steel plates 212 and end plates 211 are welded to the top of the piles. Next, according to the spacing of the column piles 21, a main beam 33 of appropriate length (usually an integer multiple of 3 meters) is selected and spliced ​​into a group on the ground. The spliced ​​main beams 33 are hoisted onto the end plates 211 at the top of the lattice columns 22 using lifting equipment such as truck cranes, and then welded and fixed using gantry clamps. Then, the crossbeams 32 are hoisted according to the designed spacing, with one end resting on the main beam 33 and the other end attached to the top of the foundation pit cap beam 12, ensuring a secure connection. Subsequently, bridge deck panels 31 are laid on the crossbeams 32 and guardrails 34 are installed, completing the erection of one span of the construction platform. The hoisting equipment is then moved to the erected platform, and the above steps are repeated, span by span, until the entire construction platform is erected. This "fishing method" allows for efficient and reliable construction of foundation pit support structures with construction platforms, effectively ensuring construction safety and progress.

[0075] In summary, this utility model provides a foundation pit support structure with a construction platform. By sharing a lattice column pile as the support structure between the construction platform and the foundation pit, it solves the problems of repetitive construction of column piles, resource waste, low space utilization, and insufficient construction efficiency in existing foundation pit support and platform erection. Through the innovative combination of lattice column piles, the support system not only undertakes the function of foundation pit support but also directly bears the load of the platform, realizing coordinated force sharing between the platform and the support structure, and significantly improving structural stability and construction safety. In specific implementation, the platform consists of a crossbeam and a bridge deck. One end of the crossbeam is supported on the top of the surrounding support structure, and the other end is connected to the end of the lattice column, ensuring rapid and continuous platform construction. This solution simplifies the construction process, optimizes material configuration, reduces project costs, and adopts prefabricated installation, significantly improving construction speed and adaptability. The platform is easy to disassemble and reuse, and can adapt to various complex and space-constrained foundation pit environments, achieving an organic unity of economy, safety, and environmental protection, demonstrating good technical advantages and broad application prospects.

[0076] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A foundation pit support structure with a construction platform, installed within the foundation pit, characterized in that, include: (1) Peripheral support structure set at the edge of the foundation pit; The internal support structure (2) set in the foundation pit includes several column piles (21), several lattice columns (22) with one end inserted into the column piles (21), and horizontal supports (23). The middle part of the horizontal supports (23) is set on the lattice columns (22), and its ends are respectively connected to the peripheral support structures (1) on both sides of the foundation pit. Platform structure (3), the platform structure (3) includes a main beam (33), a bridge deck (31) and several crossbeams (32). One end of the crossbeam (32) is set on the top of the foundation pit perimeter support structure (1) and the other end is set on the top of the main beam (33). The main beam (33) is set on the top of the lattice column (22). The bridge deck (31) is laid on several crossbeams (32).

2. The foundation pit support structure with construction platform according to claim 1, characterized in that: The main beam (33) includes a group of Bailey panels and a flower rack; both ends of the main beam (33) are fixed to the top of the common column by welding end cap steel plates (211).

3. The foundation pit support structure with construction platform according to claim 2, characterized in that: The Bailey panel and the flower stand are detachably connected by a pin.

4. The foundation pit support structure with construction platform according to claim 1, characterized in that: The crossbeam (32) is a steel crossbeam (32); one end of the crossbeam (32) rests on the main beam (33), and the other end is connected to the pile top of the inner support structure (2).

5. The foundation pit support structure with construction platform according to claim 1, characterized in that: The peripheral support structure (1) includes a number of cast-in-place piles (11) set at the edge of the foundation pit, and a capping beam (12) set on the top of the cast-in-place piles (11), with one end of the crossbeam (32) set on the capping beam (12).

6. The foundation pit support structure with construction platform according to claim 1, characterized in that: The ends of the horizontal support (23) are respectively fixed to a number of walers (24).

7. The foundation pit support structure with construction platform according to claim 6, characterized in that: The horizontal support (23) is a concrete support.

8. The foundation pit support structure with construction platform according to claim 1, characterized in that: The beams (32) are parallel to each other and are spaced at the same intervals.

9. The foundation pit support structure with construction platform according to claim 1, characterized in that: The top of the column of the supporting structure is welded with a cap steel plate (211), and the side is provided with a corbel steel plate (212) to reinforce the connection between the supporting structure and the main beam (33).

10. The foundation pit support structure with construction platform according to claim 1, characterized in that: The platform structure (3) is provided with guardrails (34) on both sides. The guardrails (34) include guardrail (34) posts and guardrail (34) crossbars. The guardrail (34) posts are fixedly connected to the crossbeams (32).

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