Foundation pit construction support for railway engineering

Abstract

The utility model discloses a kind of foundation pit construction support for railway engineering, comprising: support column, the support column is set along vertical direction, and it is evenly distributed according to two-row formula lattice;Connecting frame, the connecting frame is provided with multiple from top to bottom, each the connecting frame is formed by two horizontal poles and two vertical poles, the end portion of the horizontal pole and the vertical pole is sequentially connected to form rectangular structure, horizontal pole is fixedly connected with support column, and vertical pole is telescopic structure;And fender, it is set along vertical direction, and it is connected with horizontal pole and / or vertical pole.The utility model uses modularization design, when installing, complex mechanical equipment and a large number of personnel are not needed, and it can be quickly assembled and built;When disassembling, fastener is loosened, and component can be separated, convenient for transportation storage, which can significantly shorten preparation time in early construction, and construction efficiency is high, effectively avoid delay of construction period due to complex construction.

Description

Technical Field

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

[0002] Construction scaffolding plays a crucial role in railway engineering, serving as the cornerstone for ensuring the safety and stability of numerous critical structural components. In the construction of railway bridge substructures, excavation of foundation pits is necessary to build stable construction platforms and ensure the piers' solidity and reliability. In this case, foundation pit scaffolding effectively supports the sidewalls, preventing collapse and providing safe space for subsequent operations. Furthermore, the construction of underground structures such as underground stations also relies on foundation pit scaffolding, as it can withstand the lateral pressure of the surrounding soil, creating a safe environment for internal construction operations.

[0003] Among numerous railway engineering foundation pit construction support solutions, patent document CN119434286A provides a railway engineering foundation pit construction support system. Its core lies in a U-shaped support system composed of a support frame and a U-shaped frame, which achieves rapid assembly and disassembly through locking and partitioning mechanisms, aiming to improve construction efficiency, reduce costs, and enhance structural strength. Specifically, the installation section of the support frame is U-shaped, with L-shaped support sections at the four corners, forming a stable structure in conjunction with the U-shaped frame. The locking mechanism includes a U-shaped installation block, a locking part, and a connecting part, working in conjunction with the partitioning plate and snap-fit ​​part in the partitioning mechanism to both enhance the support strength and prevent sand and soil intrusion. However, the existing technology still has shortcomings. The aforementioned support frame requires construction by lowering it section by section, resulting in a complex structure and cumbersome installation and disassembly, leading to extended pre-construction preparation time and increased procedures. Especially for shallow foundation pits, this complexity makes construction extremely inconvenient, potentially delaying the construction period and increasing costs. Summary of the Invention

[0004] To address the aforementioned problems, this utility model provides a foundation pit construction support for railway engineering. By simplifying its structure and installation / dismantling process, it enhances its adaptability and practicality to meet the needs of railway engineering construction. Specifically, the following technical solution can be adopted: The railway engineering foundation pit construction support described in this utility model includes: Support columns, which are arranged vertically and distributed in two rows of uniform dot matrix; A connecting frame, comprising multiple frames arranged from top to bottom, each frame consisting of two horizontal bars and two vertical bars. The ends of the horizontal and vertical bars are sequentially connected to form a rectangular structure. The horizontal bars are fixedly connected to support columns, and the vertical bars are telescopic structures. The protective plate is installed vertically and connected to the horizontal and / or vertical bars.

[0005] Furthermore, the crossbar is provided with a connecting sleeve, which is fixedly spaced along the length of the crossbar. The connecting sleeve is positioned corresponding to the support column and is slidably fitted onto the support column. The connecting sleeve is also provided with a first fastener for fixing it to the support column.

[0006] Furthermore, a guide pair is provided between the connecting sleeve and the support column. The guide pair includes a sliding protrusion arranged vertically and a sliding groove adapted thereto. The sliding protrusion is provided on the inner wall of the connecting sleeve or the outer wall of the support column, and the sliding groove is provided on the outer wall of the support column or the inner wall of the connecting sleeve, corresponding to the sliding protrusion.

[0007] Furthermore, the crossbar is provided with a first blind groove or a first through groove with a vertical opening. The first blind groove is provided on the bottommost crossbar and the opening of the first blind groove faces upward. The first through groove is provided on the remaining crossbars above the bottommost layer. The protective plate connected to the crossbar is inserted into the first blind groove and the first through groove.

[0008] Furthermore, the longitudinal rod includes a first connecting rod and a second connecting rod, with the opposite ends of the first connecting rod and the second connecting rod being inserted and connected and locked by a second fastener. The ends of the first connecting rod and the second connecting rod that are far apart from each other are respectively fixedly connected to adjacent crossbars. The protective plate is slidably inserted into both the first connecting rod and the second connecting rod.

[0009] Furthermore, the first connecting rod includes two parallel square tubes, each square tube having a plurality of first connecting holes. The two square tubes are connected by a plurality of first connecting blocks spaced apart along their length. Two adjacent first connecting blocks and the two square tubes enclose each other to form a second through groove for inserting the protective plate. The bottom of the two lowest square tubes is provided with a first base plate, which makes the second through groove on it form a second blind groove with an upward opening.

[0010] Furthermore, the second connecting rod includes two channel steels with openings facing each other. The channel steels are slidably sleeved on the outside of the two square tubes. The end of the channel steel away from the crossbar is provided with a plurality of second connecting holes, wherein at least one of the second connecting holes is connected to at least one of the first connecting holes by a second fastener.

[0011] Furthermore, a plurality of second connecting blocks are fixedly arranged at intervals along the length of the two channel steels of the second connecting rod. The spacing between the second connecting blocks is equal to the spacing between the first connecting blocks. Two adjacent second connecting blocks and two channel steels enclose each other to form a third through groove for penetrating the protective plate. A second base plate is fixedly connected between the bottom flanges of the two channel steels at the bottom layer, so that the third through groove on it forms a third blind groove with the opening facing upward.

[0012] Furthermore, the connecting sleeve at the end is fixedly connected to a first connecting lug, and the ends of the first connecting rod and the second connecting rod that are far apart are both fixedly connected to a second connecting lug. The first connecting lug and the second connecting lug are fixedly connected by a third fastener.

[0013] Furthermore, the lower end of the support column is provided with a pointed tip.

[0014] This utility model provides a modular design for railway engineering foundation pit construction support, consisting of support columns, connecting frames, and protective plates. These components are connected and fixed using fasteners. Installation requires no complex machinery or large personnel, allowing for rapid assembly. Disassembly is simple; components can be separated by loosening the fasteners, facilitating transportation and storage. Compared to existing technologies with complex support structures and cumbersome installation and disassembly, this utility model significantly shortens pre-construction preparation time, reduces procedures, increases construction efficiency, and effectively avoids project delays caused by construction complexity. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the connection structure between the support column and the connecting frame in this utility model. Figure 1 .

[0017] Figure 3 This is a schematic diagram of the connection structure between the support column and the connecting frame in this utility model. Figure 2 .

[0018] Figure 4 This is a construction diagram of this utility model. Detailed Implementation

[0019] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings. These embodiments are implemented based on the technical solution of this utility model and provide detailed implementation methods and specific working processes. However, the protection scope of this utility model is not limited to the following embodiments.

[0020] like Figure 1-4 As shown, the railway engineering foundation pit construction support of this utility model includes a support column 1, a connecting frame, and a protective plate 3, etc.

[0021] At the foundation pit construction site, two rows of support columns 1 are set vertically as the basic support structure for the entire foundation pit construction scaffold. These support columns 1 are made of high-strength steel pipes to ensure sufficient load-bearing capacity. In this embodiment, there are six support columns 1, arranged in two rows with a uniform 2×3 matrix distribution. A waterproof cap (not shown in the attached diagram) can also be installed on the top of the support column 1 to prevent rainwater and other impurities from entering the support column 1. The lower end of the support column 1 is provided with a pointed tip; this design allows the support column 1 to be inserted more firmly into the foundation, enhancing the stability of the entire scaffold. During installation, the specific location and spacing of the support columns 1 are determined according to the design dimensions of the foundation pit and geological conditions. The support columns 1 are vertically driven into the ground using piling equipment or manual hammering until the pointed tip penetrates to a predetermined depth in the foundation, completing the fixed installation of the support columns 1.

[0022] A connecting frame is installed on the support column 1, and multiple such frames are spaced apart vertically. The connecting frame is a rectangular structure consisting of two horizontal bars 2 and two vertical bars, with the ends of the horizontal bars 2 and vertical bars sequentially fixedly connected. The horizontal bars 2 and vertical bars can be made of steel, possessing high strength and rigidity. The horizontal bars 2 are fixedly and slidably connected to the row of support columns 1 vertically, specifically through multiple connecting sleeves 4 fixedly and slidably installed along the length of the horizontal bars 2. The connecting sleeves 4 are fitted around the periphery of the support column 1 and are fixedly and slidably connected to the support column 1 using first fasteners 5, preferably bolts and nuts. To facilitate the connection between the support column 1 and the connecting sleeves 4, allowing for smooth movement during installation, in this embodiment, a sliding protrusion 6 is provided on one of the inner sidewalls of the connecting sleeve 4 and the sidewall of the support column 1, and a sliding groove 7 is provided on the other. The sliding protrusion 6 and the sliding groove 7 are slidably connected vertically, and the sliding protrusion 6 and the sliding groove 7 have an elongated structure.

[0023] The longitudinal rods have a telescopic function. In this embodiment, a first connecting rod and a second connecting rod can be interlocked. Protective plates 3 are slidably inserted into both the first and second connecting rods, and their opposite ends are fixedly connected to the two horizontal rods 2. To achieve a fixed connection between the first and second connecting rods, a second fastener 10 is provided, preferably a bolt and a nut. During installation, the telescopic length of the longitudinal rods is adjusted according to the width of the pit and construction requirements, ensuring that the connecting frame fits tightly against the sidewall of the pit, thus ensuring the stability and adaptability of the entire support system.

[0024] The protective plate 3 is slidably inserted into the horizontal bar 2 and / or longitudinal bar in the vertical direction to prevent soil and debris from entering the foundation pit and ensure the safety of construction personnel and equipment. If multiple construction supports are set up in the same excavated foundation pit, the protective plate 3 may not be installed on adjacent construction support components to facilitate the construction process. On the horizontal bar 2, the lowermost horizontal bar 2 is provided with multiple first blind slots 8 with openings facing upwards, and the remaining horizontal bars 2 are provided with vertical first through slots 9. The protective plate 3 installed on the horizontal bar 2 passes through the first through slots 9 and is embedded in the first blind slots 8 at its bottom. On the longitudinal rod, the first connecting rod includes two parallel square tubes 11, each with multiple vertical first connecting holes 12. The two square tubes 11 are connected by multiple first connecting blocks 13, which are spaced apart along the length of the square tubes 11. Adjacent first connecting blocks 13 and the two square tubes 11 enclose a second through groove for inserting the protective plate 3. The bottom of the two lowest square tubes 11 is fixedly connected to a first base plate 14. The presence of the first base plate 14 causes the original second through groove to form a second blind groove. The protective plate 3 installed on the first connecting rod passes through the second through groove and is embedded in the second blind groove at its bottom. The second connecting rod includes two channel steels 15 with openings facing each other. The two channel steels 15 are slidably sleeved on the outside of the two square tubes 11, and the end of the channel steel 15 away from the crossbar 2 is provided with multiple second connecting holes. At least one second connecting hole is connected to at least one first connecting hole 12 by a second fastener 10. Multiple second connecting blocks 16 are fixedly connected at intervals along the length of the two channel steels 15. The spacing between the second connecting blocks 16 is equal to the spacing between the first connecting blocks 13. Two adjacent second connecting blocks 16 and two channel steels 15 enclose a third through groove for penetrating the protective plate 3. A second bottom plate 17 is fixedly connected between the bottom flanges of the two lowest channel steels 15. The presence of the second bottom plate 17 makes the original third through groove a third blind groove. The protective plate 3 installed on the second connecting rod passes through the third through groove and is embedded in the third blind groove at the bottom.

[0025] When installing the protective plate 3, according to the depth of the pit and the soil conditions of the side wall, the protective plate 3 is inserted into the corresponding positions on the horizontal bar 2 and the vertical bar in sequence to ensure that the protective plate 3 can effectively block soil and debris.

[0026] Preferably, the connecting sleeve 4 at the end is fixedly connected to a first connecting lug 18, and the ends of the first connecting rod and the second connecting rod that are far apart from each other are both fixedly connected to a second connecting lug 19. The first connecting lug 18 and the second connecting lug 19 are fixedly connected by a third fastener 20, which is preferably a bolt and a nut. This design tightly connects the entire foundation pit construction support frame together to form a whole, thereby enhancing the overall stability and load-bearing capacity of the support.

[0027] The method of use and operation steps of this utility model are as follows: Pre-construction preparation: Based on the design drawings of the railway engineering foundation pit and the site geological conditions, determine the number and location of support columns 1. Prepare the necessary support columns 1, connecting frames, protective plates 3, and other auxiliary tools and equipment.

[0028] Installation of support column 1: Refer to the attached document. Figure 4 Place one set of the connecting frames required for construction on the ground of the foundation pit to be excavated, assemble the horizontal bar 2 and the vertical bar according to the rectangular structure, and fix them by passing the first connecting ear 18 and the second connecting ear 19 through the anchor nail 21. The position corresponding to the connecting sleeve 4 is the construction position of the support column 1.

[0029] The support column 1 is driven vertically into the ground using piling equipment or manual hammering until its tip reaches the predetermined depth in the foundation. The verticality and stability of the support column 1 must be ensured, and deviations should be controlled within the design tolerances. The support column 1 is installed diagonally from all four sides first, followed by the central section. The support column 1 and the crossbar 2 are connected by sliding protrusions 6 and sliding grooves 7 to achieve precise positioning.

[0030] Assembly of the connecting frame: Assemble the remaining crossbars 2 and longitudinal bars according to a rectangular structure. Adjust the telescopic length of the longitudinal bars to allow the connecting frame to adapt to the width of the pit. Then, use the second fastener 10 to fix the first connecting rod and the second connecting rod of the longitudinal bar together. Use the third fastener 20 to fix the first connecting lug 18 on the connecting sleeve 4 to the second connecting lug 19 on the longitudinal bar together.

[0031] Installation of protective plate 3: Depending on the depth of the pit, after the uppermost connecting frame is fixed, the protective plate 3 is then inserted into the corresponding positions on the horizontal bar 2 and the vertical bar in sequence. That is, the protective plate 3 is firmly installed on the horizontal bar 2 and the vertical bar through the cooperation of the first through groove 9 and the first blind groove 8, the second through groove and the second blind groove, and the third through groove and the third blind groove.

[0032] As the excavation progresses, the support column 1 is gradually exposed. Multiple connecting frames are then fitted around the support column 1 in sequence. As the excavation progresses, the connecting frames are installed from top to bottom. The protective plate 3 moves downward continuously. When some protective plates 3 do not move synchronously, they can be moved manually by hammering.

[0033] Maintenance during construction: Regularly inspect and maintain the support structure, promptly identify and address any loosening or deformation issues, and ensure safety during construction.

[0034] Compared with the prior art, the beneficial effects of this utility model are as follows: a. The support columns 1, connecting frames, and protective plates 3 of the foundation pit construction scaffold adopt a modular design, which can be fixed, slidably connected, and plugged in using fasteners, simplifying the connection between the various components. During installation, no complex machinery or large number of personnel are required, and the scaffold can be quickly assembled and erected; during disassembly, simply loosening the fasteners allows for easy separation of the components, facilitating transportation and storage, greatly improving construction efficiency and shortening the construction period.

[0035] b. The telescopic function of the longitudinal rods and the sliding plug design of the protective plate 3 enable the foundation pit construction support to flexibly adapt to foundation pits of different sizes and shapes, and can be widely used in various railway engineering shallow foundation pit construction scenarios.

[0036] c. The matrix distribution of support columns 1 provides a stable foundation for the entire structure; the tight connection between the components in the rectangular connecting frame enhances the integrity and rigidity of the entire support; the blocking effect of the protective plate 3 effectively prevents soil and debris from collapsing into the foundation pit, providing reliable safety for construction personnel and equipment and reducing safety risks during construction.

[0037] d. Each component can maintain good performance and integrity after disassembly. After simple inspection, maintenance and repair, it can be reused for other foundation pit construction projects, which reduces construction costs, realizes the recycling of resources, and has significant economic and environmental benefits.

[0038] It should be noted that in the description of this utility model, terms such as "front", "rear", "left", "right", "vertical", "horizontal", "inner", and "outer" indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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 this utility model.

Claims

1. A construction support for foundation pits in railway engineering, characterized in that: include Support column (1), the support column (1) is set in the vertical direction and is distributed in two rows of uniform dot matrix; A connecting frame, comprising multiple connecting frames arranged from top to bottom, each connecting frame consisting of two horizontal bars (2) and two vertical bars. The ends of the horizontal bars (2) and the vertical bars are sequentially connected to form a rectangular structure. The horizontal bars (2) are fixedly connected to the support columns (1), and the vertical bars are telescopic structures. The protective plate (3) is installed vertically and connected to the horizontal bar (2) and / or the longitudinal bar; A connecting sleeve (4) is provided on the crossbar (2). The connecting sleeve (4) is fixedly provided at intervals along the length of the crossbar. The connecting sleeve (4) is positioned opposite to the support column (1). The connecting sleeve (4) is slidably sleeved on the support column (1). A first fastener (5) is also provided on the connecting sleeve (4) for fixing it to the support column (1). The crossbar (2) is provided with a first blind groove (8) or a first through groove (9) with a vertical opening. The first blind groove (8) is provided on the bottommost crossbar (2) and the opening of the first blind groove (8) is upward. The first through groove (9) is provided on the remaining crossbars (2) above the bottommost layer. The protective plate (3) connected to the crossbar (2) is inserted into the first blind groove (8) and the first through groove (9). The longitudinal bar includes a first connecting rod and a second connecting rod. The opposite ends of the first connecting rod and the second connecting rod are connected and locked by a second fastener (10). The opposite ends of the first connecting rod and the second connecting rod are respectively fixedly connected to the adjacent crossbar (2). The protective plate (3) is slidably inserted into both the first connecting rod and the second connecting rod. The connecting sleeve (4) at the end is fixedly connected to a first connecting ear (18), and the ends of the first connecting rod and the second connecting rod that are far apart are both fixedly connected to a second connecting ear (19). The first connecting ear (18) and the second connecting ear (19) are fixedly connected by a third fastener (20).

2. The foundation pit construction support for railway engineering according to claim 1, characterized in that: A guide pair is provided between the connecting sleeve (4) and the support column (1). The guide pair includes a sliding protrusion (6) arranged vertically and a sliding groove (7) adapted thereto. The sliding protrusion (6) is provided on the inner wall of the connecting sleeve (4) or the outer wall of the support column (1). The sliding groove (7) is provided on the outer wall of the support column (1) or the inner wall of the connecting sleeve (4) corresponding to the sliding protrusion (6).

3. The foundation pit construction support for railway engineering according to claim 1, characterized in that: The first connecting rod includes two parallel square tubes (11). The square tubes (11) are provided with a plurality of first connecting holes (12). The two square tubes (11) are connected by a plurality of first connecting blocks (13) spaced apart along the length direction. Two adjacent first connecting blocks (13) and the two square tubes (11) enclose each other to form a second through groove for inserting the protective plate (3). The bottom of the two square tubes (11) at the bottom of the lowest layer is provided with a first bottom plate (14), so that the second through groove on it forms a second blind groove with the opening facing upward.

4. The foundation pit construction support for railway engineering according to claim 3, characterized in that: The second connecting rod includes two channel steels (15) with openings facing each other. The channel steels (15) are slidably sleeved on the outside of the two square tubes (11). The end of the channel steels (15) away from the crossbar (2) is provided with a plurality of second connecting holes, wherein at least one of the second connecting holes is connected to at least one of the first connecting holes (12) by a second fastener (10).

5. The foundation pit construction support for railway engineering according to claim 4, characterized in that: Multiple second connecting blocks (16) are fixedly arranged at intervals along the length direction between the two channel steels (15) of the second connecting rod. The spacing between the second connecting blocks (16) is equal to the spacing between the first connecting blocks (13). Two adjacent second connecting blocks (16) and two channel steels (15) enclose each other to form a third through groove for penetrating the protective plate (3). A second bottom plate (17) is fixedly connected between the bottom flanges of the two channel steels (15) at the bottom layer, so that the third through groove on it forms a third blind groove with the opening facing upward.

6. The railway engineering foundation pit construction support according to any one of claims 1 to 5, characterized in that: The lower end of the support column (1) is provided with a pointed tip.

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