Quick connection joint structure and method of assembled i-shaped steel support for foundation pit support

Abstract

This application discloses a prefabricated I-beam support quick-connection node structure for foundation pit support, including first and second U-shaped steel plates connected by multiple steel pipe connection components. Each steel pipe connection component includes a first steel pipe, a protective steel pipe, and a second steel pipe. The outer ends of the first and second steel pipes are respectively provided with insertion blocks, and each insertion block is provided with an insertion component. An extension component is commonly provided inside the first, protective, and second steel pipes. A limiting component connected to the extension component is provided at the top of the first steel pipe. The extension component includes a first gear movably disposed inside the first steel pipe, with a second gear meshing on the outer surface of the first gear. A rotating rod is provided on the left side of the second gear, and a turntable is provided on the left end face of the rotating rod. A threaded rotating rod is provided on the left side of the turntable, and a threaded cylinder is threadedly connected to the outer surface of the threaded rotating rod. The end of the threaded cylinder is connected to the inner end of the second steel pipe. This application has advantages such as facilitating the installation and disassembly of the I-beams and allowing adjustment of the spacing between support frames according to the width of the foundation pit.

Description

Technical Field

[0001] This application belongs to the field of foundation pit support technology, specifically relating to a prefabricated I-beam support quick connection node structure and method for foundation pit support. Background Technology

[0002] An excavation pit is a pit formed by excavating at the designed foundation location according to the base elevation and foundation plan dimensions. Before excavating the pit, a scientific and reasonable excavation plan must be developed based on geological and hydrological data and the actual conditions of nearby buildings, while ensuring proper waterproofing and drainage. When the excavation depth is shallow, slope protection can be used to ensure slope stability, with the slope determined according to relevant construction regulations. If the excavation is deep and there are nearby buildings, pit wall support and shotcrete reinforcement can be used. For large pits, even diaphragm walls and interlocking column-type bored piles may be used to prevent the outer soil layer from collapsing. There are various types of excavation pits, including I-beam steel pits.

[0003] H-beams are an economical and efficient structural material with an optimized cross-sectional area distribution and a more reasonable strength-to-weight ratio. They are named for their cross-section resembling the letter "H". Because all parts of an H-beam are arranged at right angles, it possesses significant advantages in all directions, including strong bending resistance, simple construction, cost savings, and lightweight structure.

[0004] Chinese patent application number 202410948380.5 discloses a foundation pit support device and method using H-shaped steel pre-bracing anchored into the soil. This device and method solves the problems of traditional foundation pit support devices being inconvenient to disassemble, resulting in heavy installation, difficult transportation, and inability to be reused. However, this device and method still have some shortcomings in practical applications: First, it uses insert rods to fix the device inside the foundation pit, but the interior of the foundation pit is usually quite humid, which can easily cause the insert rods to shift, thus affecting the support and protection effect on the pit sidewalls; second, although the foundation pit support device achieves convenient disassembly through a simple connection structure, its stability is poor; third, it cannot adjust the support distance on both sides of the foundation pit according to the width of the pit. Therefore, it is necessary to propose a new device or method for foundation pit support to solve the above problems. Summary of the Invention

[0005] This application provides a prefabricated I-beam support quick connection node structure and method for foundation pit support, which has the advantages of convenient installation and disassembly of I-beams and the ability to adjust the spacing between support frames according to the width of the foundation pit.

[0006] To achieve the above-mentioned objectives, this application provides the following technical solution:

[0007] This application provides a prefabricated I-beam support quick connection node structure for foundation pit support, which includes a first U-shaped steel plate and a second U-shaped steel plate with openings opposite each other and connected by multiple steel pipe connection components;

[0008] The steel pipe connection assembly includes a first steel pipe, a protective steel pipe fixed to the left end face of the first steel pipe, and a second steel pipe movably sleeved on the outside of the left end of the protective steel pipe. The first steel pipe and the second steel pipe are respectively provided with insertion blocks on one side opposite to each other. The two insertion blocks are respectively provided with insertion components that connect to the first U-shaped steel plate or the second U-shaped steel plate. An extension component is movably provided inside the first steel pipe, the protective steel pipe, and the second steel pipe. A limiting component connected to the extension component is provided at the top of the first steel pipe.

[0009] The extension assembly includes a first gear movably installed inside the first steel pipe, a second gear meshing with the outer surface of the first gear, a rotating rod on the left side of the second gear, a turntable on the left end of the rotating rod, a threaded rotating rod on the left side of the turntable, a threaded cylinder threadedly connected to the outer surface of the threaded rotating rod, and the end of the threaded cylinder connected to the inner end of the second steel pipe.

[0010] Furthermore, the limiting component includes a rotating shaft movably mounted on the top of the first steel pipe, the top of the rotating shaft is provided with a rotating wheel, the bottom is connected to the first gear, a protective ring is fixedly installed on the top of the first steel pipe, a limiting bolt is threadedly connected to the outside of the protective ring, a positioning hole corresponding to the limiting bolt is opened on the outside of the rotating shaft, and the limiting bolt is inserted into the positioning hole.

[0011] Furthermore, the plug-in assembly includes plug-in posts symmetrically arranged at the top and bottom of the plug-in block. Each plug-in post has a vertically opening limiting groove on its outer side. A positioning block is movably sleeved on the outer side of the plug-in post. The inner side of the positioning block is limited and slidably connected to the limiting groove. A sliding block is provided on one side of the positioning block.

[0012] The first U-shaped steel plate and the second U-shaped steel plate are provided with multiple pairs of fixing blocks corresponding to each of the steel pipe connecting components. Each fixing block is provided with a horizontal limiting groove and a vertical limiting groove that are interconnected and perpendicular. The horizontal limiting groove is located in the middle of the fixing block. There are two vertical limiting grooves, which are provided on the upper and lower sides of the horizontal limiting groove. The vertical limiting groove is adapted to the sliding block. A limiting block is provided at the other end of the vertical limiting groove. The limiting block is provided with a groove that is adapted to the positioning block.

[0013] When the plug-in assembly is connected to the first U-shaped steel plate or the second U-shaped steel plate, each plug-in block is located in the transverse limiting groove of the corresponding fixed block, each sliding block is located in the corresponding vertical limiting groove, and each positioning block is inserted into the groove of the corresponding limiting block.

[0014] Furthermore, each of the plug-in blocks has a plug-in plate vertically arranged on its outer end. Each plug-in plate has multiple mounting holes corresponding to the first U-shaped steel plate or the second U-shaped steel plate and is connected by positioning bolts.

[0015] Furthermore, the outer surfaces of the first U-shaped steel plate and the second U-shaped steel plate are respectively provided with U-shaped grooves perpendicular to their respective openings.

[0016] The construction method for the prefabricated I-beam support quick-connection node structure for foundation pit support described in the above technical solution comprises the following steps:

[0017] S1. First, level the support pit and then assemble the various steel fittings inside the support pit.

[0018] S2. The first steel pipe and the second steel pipe of each of the steel pipe connecting assemblies are respectively inserted into the interior of the first U-shaped steel plate and the second U-shaped steel plate through the plug-in assembly;

[0019] S3. Place the foundation pit support plate in the first U-shaped steel plate, the second U-shaped steel plate, and the U-shaped groove, and align it with the corresponding foundation pit support arm.

[0020] S4. Adjust the spacing between the first U-shaped steel plate and the second U-shaped steel plate and their fit with the pit wall by extending the components. Finally, limit the extension components by using the limiting components to ensure that the first U-shaped steel plate and the second U-shaped steel plate are stably positioned at the pit wall and supported.

[0021] Compared with existing technologies, the prefabricated I-beam support quick connection node structure and method for foundation pit support in this application has the following advantages:

[0022] (1) The prefabricated I-beam support quick connection node structure and construction method for the foundation pit support, by setting extension components, when it is necessary to adjust the distance between the first U-shaped steel plate and the second U-shaped steel plate, the rotating wheel is rotated, and the rotating wheel drives the first gear and the second gear to mesh and rotate through the rotating shaft, thereby driving the rotating rod, the rotating disk and the threaded rotating rod to rotate synchronously. The threaded rotating rod and the threaded cylinder set inside the second steel pipe are threadedly connected to each other, so that the threaded rotating rod further pushes the first steel pipe and the protective steel pipe to move to the left or right, thereby adjusting the distance between the first U-shaped steel plate and the second U-shaped steel plate, realizing the support adjustment according to the distance of the foundation pit, and improving the support range of the foundation pit.

[0023] (2) The prefabricated I-beam support quick connection node structure and construction method for the foundation pit support, by setting up the plug-in component, when in use, the plug-in block and plug-in column are plugged into the inside of the horizontal limiting groove. At this time, the sliding block slides at the surface position of the fixed block. By moving the sliding block, the positioning block is moved at the outer surface of the plug-in column, so that the sliding block slides from the horizontal limiting groove into the inside of the vertical limiting groove, and further drives the positioning block to the position where the limiting blocks are matched, so that the groove of the limiting block is engaged with the positioning block and limited, and finally the first steel pipe and the second steel pipe are connected to the side positions of the first U-shaped steel plate and the second U-shaped steel plate respectively, which facilitates the assembly and connection of the I-beam and improves the assembly efficiency of the I-beam frame.

[0024] (3) The prefabricated I-beam support quick connection node structure and construction method for the foundation pit support, by setting a limiting component, when in use, the rotating shaft driven by the turntable realizes the adjustment of the extension component. When in use, the two sides between the first U-shaped steel plate and the second U-shaped steel plate are pressed by the side wall, causing the gear to rotate. By rotating the limiting bolt into the positioning hole, the rotating shaft and the turntable are limited, so as to avoid the extension component shrinkage affecting the support effect of the first steel pipe, the protective steel pipe and the second steel pipe on the foundation pit, thereby improving the stability of the foundation pit support. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of a prefabricated I-beam support quick-connection node structure for foundation pit support according to the present invention.

[0026] Figure 2 This is a three-dimensional schematic diagram of the connection between the first steel pipe, the protective steel pipe, and the second steel pipe in this invention;

[0027] Figure 3 This is a front sectional view of the connection between the first steel pipe, the protective steel pipe, and the second steel pipe in this invention;

[0028] Figure 4 For the present invention Figure 2 Enlarged view of the structure at point A in the middle;

[0029] Figure 5 This is a schematic diagram of the plug-in component being locked in this invention;

[0030] Figure 6 This is a schematic diagram of the U-shaped groove of the first U-shaped steel plate in this invention.

[0031] In the diagram: 1. First steel pipe; 2. Protective steel pipe; 3. Second steel pipe; 4. First U-shaped steel plate; 5. Second U-shaped steel plate; 6. U-shaped groove; 7. Positioning bolt; 8. Fixing block; 9. Horizontal limiting groove; 10. Vertical limiting groove; 12. Limiting assembly; 121. Rotating wheel; 122. Rotating shaft; 123. Protective ring; 124. Limiting bolt; 125. Positioning hole; 13. Insertion plate; 14. Mounting hole; 15. Insertion block; 16. Extension assembly; 161. First gear; 162. Second gear; 163. Rotating rod; 164. Turntable; 165. Threaded rotating rod; 166. Threaded cylinder; 17. Insertion assembly; 171. Insertion post; 172. Limiting slide groove; 173. Positioning block; 174. Sliding block; 175. Limiting block. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this disclosure pertains. The terms "upper," "lower," "left," "right," "front," and "rear" used in the specification and claims of this patent application are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship also changes accordingly. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Any aspects not detailed in this application are well-known to those skilled in the art.

[0033] Please refer to Figure 1-6 This application provides a prefabricated I-beam support quick connection node structure for foundation pit support, which includes a first U-shaped steel plate 4 and a second U-shaped steel plate 5 with openings opposite each other and connected by multiple steel pipe connection components.

[0034] The steel pipe connection assembly includes a first steel pipe 1, a protective steel pipe 2 fixed to the left end face of the first steel pipe 1, and a second steel pipe 3 movably sleeved on the outside of the left end of the protective steel pipe 2. The first steel pipe 1 and the second steel pipe 3 are respectively provided with plug-in blocks 15 on opposite sides of each other. The two plug-in blocks 15 are respectively provided with plug-in components 17 that are connected to the first U-shaped steel plate 4 or the second U-shaped steel plate 5. An extension component 16 is movably provided inside the first steel pipe 1, the protective steel pipe 2, and the second steel pipe 3. A limiting component 12 connected to the extension component 16 is provided on the top of the first steel pipe 1.

[0035] The extension assembly 16 includes a first gear 161 movably installed inside the first steel pipe 1. A second gear 162 is meshed with the outer surface of the first gear 161. A rotating rod 163 is provided on the left side of the second gear 162. A turntable 164 is provided on the left end face of the rotating rod 163. A threaded rotating rod 165 is provided on the left side of the turntable 164. A threaded cylinder 166 is threadedly connected to the outer surface of the threaded rotating rod 165. The end of the threaded cylinder 166 is connected to the inner end of the second steel pipe 3.

[0036] Specifically, the limiting component 12 includes a rotating shaft 122 movably mounted on the top of the first steel pipe 1. The rotating shaft 122 has a rotating wheel 121 on its top and is connected to the first gear 161 at its bottom. A protective ring 123 is fixedly mounted on the top of the first steel pipe 1. A limiting bolt 124 is threadedly connected to the outside of the protective ring 123. A positioning hole 125 corresponding to the limiting bolt 124 is opened on the outside of the rotating shaft 122. The limiting bolt 124 is inserted into the positioning hole 125. When it is necessary to adjust the distance between the first U-shaped steel plate 4 and the second U-shaped steel plate 5, the rotating wheel 121 is rotated. The rotating wheel 121 drives the first gear 161 and the second gear 162 to mesh with each other through the rotating shaft 122. This causes the second gear 162, the rotating rod 163, the turntable 164, and the threaded rotating rod 165 to rotate synchronously. The threaded rotating rod 165 is threadedly connected to the threaded cylinder 166 inside the second steel pipe 3, which further pushes the first steel pipe 1 and the protective steel pipe 2 to move to the left or right, thereby adjusting the distance between the two U-shaped steel plates. This allows for support adjustment based on the spacing of the support pit, increasing the support range of the support pit. The limiting bolt 124 is used to limit the rotating shaft 122.

[0037] In this embodiment, the plug-in assembly 17 includes plug-in posts 171 symmetrically arranged at the top and bottom of the plug-in block 15. Each plug-in post 171 has a limiting groove 172 vertically formed on its exterior. A positioning block 173 is movably sleeved on the exterior of the plug-in post 171. The inner side of the positioning block 173 is limited and slidably connected to the limiting groove 172. A sliding block 174 is provided on one side of the positioning block 173.

[0038] The first U-shaped steel plate 4 and the second U-shaped steel plate 5 have multiple pairs of fixing blocks 8 corresponding to each steel pipe connecting component on their inner openings. Each fixing block 8 has a horizontal limiting groove 9 and a vertical limiting groove 10 that are interconnected and perpendicular to each other. The horizontal limiting groove 9 is located in the middle of the fixing block 8. There are two vertical limiting grooves 10, which are arranged vertically on the upper and lower sides of the horizontal limiting groove 9. The vertical limiting groove 10 is adapted to the sliding block 174. A limiting block 175 is provided at the other end of the vertical limiting groove 10. The limiting block 175 has a groove that is adapted to the positioning block 173.

[0039] When the plug-in assembly 17 is connected to the first U-shaped steel plate 4 or the second U-shaped steel plate 5, each plug-in block 15 is located in the transverse limiting groove 9 of the corresponding fixed block 8, each sliding block 174 is located in the corresponding vertical limiting groove 10, and each positioning block 173 is inserted into the groove of the corresponding limiting block 175.

[0040] To further increase the stability of the node structure, each plug-in block 15 has a plug-in plate 13 vertically installed on its outer end. Each plug-in plate 13 has multiple mounting holes 14 corresponding to the first U-shaped steel plate 4 or the second U-shaped steel plate 5 and is connected by positioning bolts 7.

[0041] To facilitate the positioning and connection of the node structure with the foundation pit support, the outer sides of the first U-shaped steel plate 4 and the second U-shaped steel plate 5 are respectively provided with U-shaped grooves 6 perpendicular to their respective openings.

[0042] When applying this method, the construction steps for the prefabricated I-beam support quick-connection node structure for foundation pit support are as follows:

[0043] S1. First, level the support pit and then assemble the various steel fittings inside the support pit.

[0044] S2. The first steel pipe 1 and the second steel pipe 3 of each steel pipe connecting assembly are respectively inserted into the interior of the first U-shaped steel plate 4 and the second U-shaped steel plate 5 through the plug-in assembly 17.

[0045] S3. Place the foundation pit support plate in the first U-shaped steel plate 4, the second U-shaped steel plate 5, and the U-shaped groove 6 and align it with the corresponding foundation pit support arm.

[0046] S4. The distance between the first U-shaped steel plate 4 and the second U-shaped steel plate 5 and their fit with the pit wall are adjusted by the extension component 16. Finally, the extension component 16 is limited by the limiting component 12, so that the first U-shaped steel plate 4 and the second U-shaped steel plate 5 are stably positioned at the pit wall and supported.

[0047] In this embodiment, the plug-in assembly 17 is plugged into the first U-shaped steel plate 4 and the second U-shaped steel plate 5. The plug-in block 15 is fixed to the ends of the first steel pipe 1 and the second steel pipe 3 and inserted into the fixing block 8 inside the first U-shaped steel plate 4 and the second U-shaped steel plate 5. The fixing block 8 is located on the inner side wall of the U-shaped steel plate and is perpendicular to the contact surface of the foundation pit support plate. During the initial insertion, the plug-in block 15, together with the plug-in post 171, is inserted horizontally into the transverse limiting groove 9 of the fixing block 8. At this time, the sliding block 174 is located in the transverse limiting groove 9 and can slide horizontally. The device slides but is not locked. After insertion, manual locking is required. Specifically, the sliding block 174 is manually pushed to move the positioning block 173 up and down along the limiting groove 172 of the insertion post 171, so that the sliding block 174 slides from the horizontal limiting groove 9 into the vertical limiting groove 10. A limiting block 175 is provided at the end of the vertical limiting groove 10. The positioning block 173 is inserted into the groove of the limiting block 175 to complete the mechanical interlock. Finally, the positioning bolt 7 passes through the U-shaped groove 6 and the mounting hole 14 of the insertion plate 12 to complete the connection and enhance the shear resistance.

Claims

1. A prefabricated I-beam support quick-connection node structure for foundation pit support, characterized in that, It includes a first U-shaped steel plate (4) and a second U-shaped steel plate (5) with openings opposite each other and connected by multiple steel pipe connecting assemblies; The steel pipe connection assembly includes a first steel pipe (1), a protective steel pipe (2) fixed to the left end face of the first steel pipe (1), and a second steel pipe (3) movably sleeved on the outside of the left end of the protective steel pipe (2). The first steel pipe (1) and the second steel pipe (3) are respectively provided with plug-in blocks (15) on one side opposite to each other. The two plug-in blocks (15) are respectively provided with plug-in components (17) that are connected to the first U-shaped steel plate (4) or the second U-shaped steel plate (5). The first steel pipe (1), the protective steel pipe (2), and the second steel pipe (3) are movably provided with an extension component (16). The top of the first steel pipe (1) is provided with a limiting component (12) that is connected to the extension component (16). The extension assembly (16) includes a first gear (161) movably installed inside the first steel pipe (1), a second gear (162) meshing with the outer surface of the first gear (161), a rotating rod (163) on the left side of the second gear (162), a turntable (164) on the left end of the rotating rod (163), a threaded rotating rod (165) on the left side of the turntable (164), a threaded cylinder (166) threadedly connected to the outer surface of the threaded rotating rod (165), and the end of the threaded cylinder (166) connected to the inner end of the second steel pipe (3). The plug-in assembly (17) includes plug-in posts (171) symmetrically arranged at the top and bottom of the plug-in block (15). Each plug-in post (171) has a vertically opening limiting groove (172) on its outside. A positioning block (173) is movably sleeved on the outside of the plug-in post (171). The inner side of the positioning block (173) is limited and slidably connected to the limiting groove (172). A sliding block (174) is provided on one side of the positioning block (173). The first U-shaped steel plate (4) and the second U-shaped steel plate (5) are provided with a number of fixed blocks (8) corresponding to each of the steel pipe connecting components. Each fixed block (8) is provided with a horizontal limiting groove (9) and a vertical limiting groove (10) that are interconnected and perpendicular. The horizontal limiting groove (9) is located in the middle of the fixed block (8). There are two vertical limiting grooves (10), which are provided on the upper and lower sides of the horizontal limiting groove (9) respectively. The vertical limiting groove (10) is adapted to the sliding block (174). A limiting block (175) is provided at the other end of the vertical limiting groove (10). The limiting block (175) is provided with a groove that is adapted to the positioning block (173). When the plug-in assembly (17) is connected to the first U-shaped steel plate (4) or the second U-shaped steel plate (5), each plug-in block (15) is located in the transverse limiting groove (9) of the corresponding fixed block (8), each sliding block (174) is located in the corresponding vertical limiting groove (10), and each positioning block (173) is inserted into the groove of the corresponding limiting block (175).

2. The prefabricated I-beam support quick-connection node structure for foundation pit support according to claim 1, characterized in that: The limiting component (12) includes a rotating shaft (122) movably mounted on the top of the first steel pipe (1). The rotating shaft (122) has a rotating wheel (121) on the top and is connected to the first gear (161) at the bottom. A protective ring (123) is fixedly mounted on the top of the first steel pipe (1). A limiting bolt (124) is threadedly connected to the outside of the protective ring (123). A positioning hole (125) corresponding to the limiting bolt (124) is opened on the outside of the rotating shaft (122). The limiting bolt (124) is inserted into the positioning hole (125).

3. The prefabricated I-beam support quick-connection node structure for foundation pit support according to claim 1, characterized in that: Each of the plug-in blocks (15) has a plug-in plate (13) vertically arranged on its outer end. Each plug-in plate (13) has multiple mounting holes (14) corresponding to the first U-shaped steel plate (4) or the second U-shaped steel plate (5) and is connected by positioning bolts (7).

4. The prefabricated I-beam support quick-connection node structure for foundation pit support according to claim 1, characterized in that: The first U-shaped steel plate (4) and the second U-shaped steel plate (5) are respectively provided with U-shaped grooves (6) perpendicular to their respective openings.

5. A construction method for a prefabricated I-beam support quick-connection node structure for foundation pit support according to any one of claims 1-4, characterized in that, The steps are as follows: S1. First, level the support pit and then assemble the various steel fittings inside the support pit. S2. The first steel pipe (1) and the second steel pipe (3) of each of the steel pipe connecting assemblies are respectively inserted into the interior of the first U-shaped steel plate (4) and the second U-shaped steel plate (5) through the plug-in assembly (17); S3. Place the foundation pit support plate in the first U-shaped steel plate (4), the second U-shaped steel plate (5), and the U-shaped groove (6) and align it with the corresponding foundation pit wall. S4. Adjust the spacing between the first U-shaped steel plate (4) and the second U-shaped steel plate (5) and their fit with the pit wall by extending the component (16). Finally, limit the extension component (16) by limiting the component (12) so that the first U-shaped steel plate (4) and the second U-shaped steel plate (5) are stably positioned at the pit wall and supported.

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