A steel pipe connecting joint structure of a foundation pit support

Abstract

The application relates to the technical field of foundation pit inner support, and discloses a steel pipe connecting joint structure of a foundation pit inner support, which comprises a steel pipe, a sliding sleeve coaxial with the steel pipe and slidingly installed on the steel pipe, and a connecting assembly for connecting two adjacent steel pipes and installed between the two sliding sleeves. The application can connect two adjacent steel pipes together, disperse the axial pressure of a single steel pipe into the collaborative stress of multiple steel pipes, and inhibit the bending deformation of the steel pipe.

Description

Technical Field

[0001] This application relates to the technical field of foundation pit support, and in particular to a steel pipe connection node structure for foundation pit support. Background Technology

[0002] After excavation, the foundation pit needs to be supported to prevent collapse. For shallow foundation pits, Larssen sheet piles are generally used for support, and then steel pipes are used to further restrain the Larssen sheet piles. The two ends of the steel pipes are respectively attached to the Larssen sheet piles on opposite side walls of the foundation pit, with the steel pipes parallel to the bottom of the foundation pit.

[0003] Regarding the aforementioned technologies, existing steel pipes only provide axial support. When the axial pressure on the steel pipe is high, the steel pipe is prone to bending and deformation. Utility Model Content

[0004] To improve the support strength of steel pipes, this application provides a steel pipe connection node structure for support within a foundation pit.

[0005] This application provides a steel pipe connection node structure for internal support in a foundation pit, employing the following technical solution: A steel pipe connection node structure for internal support in a foundation pit includes: steel pipe, A sliding sleeve is slidably installed on the steel pipe, and the sliding sleeve and the steel pipe are coaxial; A connecting assembly, used to connect two adjacent steel pipes, is installed between the two sliding sleeves.

[0006] By adopting the above technical solution, the sliding sleeve design allows for axial fine adjustment of the steel pipe. By connecting the two adjacent steel pipes together through the connecting components, the axial pressure of a single steel pipe is distributed into the synergistic force of multiple steel pipes, thus suppressing the bending deformation of the steel pipe.

[0007] Optionally, the connecting assembly includes a connecting rod and a bolt, the sliding sleeve is circumferentially provided with a stiffening plate, a first end plate is installed on part of the stiffening plate, a second end plate is provided at both ends of the connecting rod, the first end plate and the second end plate pass through the bolt, and the bolt is threadedly connected with a nut.

[0008] By adopting the above technical solution, after the first end face and the second end face abut against each other, a high-strength detachable connection is provided by the bolt and nut structure, which is convenient for construction adjustment and reuse.

[0009] Optionally, the connecting assembly includes a screw and a nut, the connecting rod has a through groove, the screw passes through the two connecting rods that are in contact with each other through the through groove, both ends of the screw are threadedly connected to the nut, and the nut abuts against the connecting rod.

[0010] By adopting the above technical solution, the through groove allows for flexible adjustment of the screw position to adapt to the deviation of the steel pipe spacing. During the tightening process of the nut, the mating surface is pressed tightly, and the frictional resistance enhances the node rigidity.

[0011] Optionally, the connecting rod is connected to a first rotating shaft, which is rotatably mounted on the sliding sleeve with its own central axis as the center of rotation, and the central axis of the first rotating shaft and the central axis of the sliding sleeve are parallel to each other.

[0012] By adopting the above technical solution, before the steel pipe supports the foundation pit, the sliding sleeve is first fitted onto the steel pipe. The connecting rod can rotate relative to the sliding sleeve through the first rotating shaft. When the sliding sleeves of the two steel pipes are close to each other, the connecting rods will not interfere with each other. After the sliding sleeve is in position, the two connecting rods are connected by a connecting component.

[0013] Optionally, the connecting rod has a relief groove in its wall. When the two connecting rods are connected, the end of the connecting rod away from the sliding sleeve is located in the relief groove of the other connecting rod, and a gap is left between the end of the connecting rod and the relief groove.

[0014] By adopting the above technical solution, the two connecting rods are connected to each other through the relief groove. When the connecting rod moves axially, the end of one connecting rod abuts against the relief groove of the other connecting rod, so that the two connecting rods limit each other and improve the connection strength of the two connecting rods.

[0015] Optionally, a second rotating shaft is rotatably mounted between the first rotating shaft of the connecting rod and the sliding sleeve. The second rotating shaft rotates around its own central axis, and the central axis of the second rotating shaft and the axis of the connecting rod are arranged parallel to each other.

[0016] By adopting the above technical solution, when the second rotating shaft rotates, it drives the connecting rod to rotate, so that the two connecting rods can more accurately form a connection relationship with the other connecting rod.

[0017] Optionally, it also includes a crossbeam for supporting the steel pipe, the crossbeam being provided with a locking seat, and a locking rod being fixedly connected to the outer wall of the connecting rod. When the connecting rod is rotated, the locking rod is locked onto the locking seat.

[0018] By adopting the above technical solution, the connecting rod is connected to the crossbeam through the snap-fit ​​rod, and part of the steel pipe load is transferred to the crossbeam through the snap-fit ​​rod, increasing the additional support points.

[0019] Optionally, a fixing rod is radially inserted through the second rotating shaft, the fixing rod is threaded onto the second rotating shaft, a connecting column is fixedly connected to the outer periphery of the sliding sleeve, the second rotating shaft is sleeved on the connecting column and coaxially arranged, an annular groove is formed on the outer periphery of the connecting column, and one end of the fixing rod extends into the annular groove.

[0020] By adopting the above technical solution, the fixing rod extends into the annular groove to restrict the axial movement of the second rotating shaft. When the fixing rod is pressed against the bottom wall of the annular groove, the second rotating shaft can also be fixed.

[0021] In summary, this application includes at least one of the following beneficial effects: 1. By cooperating with the sliding sleeve, connecting rod and connecting components, the axial pressure borne by a single steel pipe is distributed to multiple adjacent steel pipes to form a cooperative force-bearing system, which effectively suppresses the bending deformation of the steel pipe caused by excessive axial pressure. 2. The axial sliding design of the sliding sleeve, the multi-angle rotation of the connecting rod through the first and second rotating shafts, and the flexible selection of two types of connecting components (flange bolt connection and screw through-slot connection) can adapt to different steel pipe spacing deviations and construction scenario requirements, and facilitate position adjustment and component assembly and disassembly during construction. Attached Figure Description

[0022] Figure 1 This is a top view schematic diagram of an embodiment of this application; Figure 2 This is a schematic diagram of the overall structure of the connection component in the first form of this application embodiment; Figure 3 This is a schematic diagram of the overall structure of the second form of the connection structure according to an embodiment of this application; Figure 4 This is a cross-sectional schematic diagram of the second form of the connection structure according to an embodiment of this application; Figure 5 This is a schematic diagram illustrating the structure of the snap-fit ​​rod snapping into the snap-fit ​​base in an embodiment of this application.

[0023] Explanation of reference numerals in the attached drawings: 10, foundation pit; 20, steel pipe; 30, sliding sleeve; 31, connecting column; 311, third end plate; 32, annular groove; 301, stiffening plate; 302, first end plate; 40, connecting rod; 41, through groove; 42, clearance groove; 50, connecting assembly; 51, connecting rod; 511, second end plate; 52, bolt; 53, threaded rod; 54, nut; 60, first rotating shaft; 70, second rotating shaft; 71, fixing rod; 80, crossbeam; 81, snap-fit ​​seat; 90, snap-fit ​​rod. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail.

[0025] This application discloses a steel pipe connection node structure for internal support in a foundation pit.

[0026] Reference Figure 1A steel pipe connection node structure for internal support of a foundation pit is applied to the internal support of the foundation pit 10, including a steel pipe 20, a sliding sleeve 30, and a connecting component 50. The two ends of the steel pipe 20 are fixedly installed on two opposite inner walls of the foundation pit 10, and the sliding sleeve 30 is slidably installed on the steel pipe 20 and remains coaxial with it. This sliding design allows the sliding sleeve 30 to be finely adjusted axially along the steel pipe 20, providing flexible adjustment space for the subsequent connection of the connecting rod 40.

[0027] Reference Figure 1 and Figure 2 The connecting component 50 is installed between the two sliding sleeves 30 to achieve a stable connection between two adjacent steel pipes 20. A stiffening plate 301 is connected to the outer periphery of the sliding sleeve 30, and a first end plate 302 is connected to part of the stiffening plate 301. The first end plate 302 has a square structure. In this embodiment, four first end plates 302 are evenly spaced along the circumference of the sliding sleeve 30.

[0028] There are two different forms in the specific settings of the connection component 50.

[0029] Reference Figure 2 The first type involves a connecting assembly 50 comprising a connecting rod 51 and bolts 52, with second end plates 511 at both ends of the connecting rod 51. The connecting rod 51 is an H-beam. When connection is required, the first end plate 302 and the second end plate 511 are connected by bolts 52, and then threaded together with nuts. This combination of bolts 52 and nuts provides a high-strength, detachable connection that is not only stable but also easy to adjust during construction, and also facilitates the reuse of components.

[0030] Reference Figure 3 and Figure 4 The second form involves a connecting assembly 50 comprising a screw 53 and a nut 54. A connecting post 31 is fixedly connected to the first end plate 302 of the sliding sleeve 30. The connecting post 31 is connected to a third end plate 311, and the first end plate 302 and the third end plate 311 are fixedly connected by a bolt and nut structure. A connecting rod 40 is connected to the connecting post 31. A through groove 41 is provided on the connecting rod 40. When connecting two adjacent steel pipes 20, the two connecting rods 40 are in contact with each other. The screw 53 passes through the through groove 41 and then nuts 54 are screwed onto both ends of the screw 53, so that the nuts 54 abut against the connecting rods 40. The through groove 41 allows the screw 53 to flexibly adjust its position according to actual conditions to accommodate possible spacing deviations between the steel pipes 20. During the tightening of the nuts 54, the contact surfaces of the connecting rods 40 are pressed together, increasing frictional resistance and enhancing the overall rigidity of the joint.

[0031] Reference Figure 3The connecting rod 40 has a relief groove 42 on its wall, which communicates with the through groove 41. When two connecting rods 40 are connected, the end of one connecting rod 40 away from the sliding sleeve 30 will be located in the relief groove 42 of the other connecting rod 40, and a gap will be left between the end of the connecting rod 40 and the relief groove 42. This design allows the two connecting rods 40 to be connected to each other through the relief groove 42. When the connecting rods 40 move axially, the end of one connecting rod 40 will abut against the relief groove 42 of the other connecting rod 40, thereby limiting the two connecting rods 40 to each other and effectively improving the connection strength of the two connecting rods 40.

[0032] Reference Figure 3 and Figure 4 In the second configuration, to further enhance the flexibility of the connecting rod 40, a first rotating shaft 60 is connected to the connecting rod 40. The first rotating shaft 60 is rotatably mounted on the sliding sleeve 30 with its own central axis as the center of rotation, and the central axis of the first rotating shaft 60 is parallel to the central axis of the sliding sleeve 30. Thus, before the steel pipe 20 supports the foundation pit 10, when the sliding sleeve 30 is fitted onto the steel pipe 20, the connecting rod 40 can rotate relative to the sliding sleeve 30 through the first rotating shaft 60. When the sliding sleeves 30 on the two steel pipes 20 approach each other, the connecting rods 40 will not interfere with each other. After the position of the sliding sleeve 30 is determined, the two connecting rods 40 are connected by the connecting assembly 50.

[0033] A second rotating shaft 70 is rotatably mounted between the first rotating shaft 60 of the connecting rod 40 and the connecting post 31. The second rotating shaft 70 and the connecting post 31 are coaxially arranged, and the second rotating shaft 70 rotates around its own central axis, which is parallel to the axis of the connecting rod 40. When the second rotating shaft 70 rotates, it can drive the connecting rod 40 to rotate together, allowing the two connecting rods 40 to better align, further improving the accuracy and flexibility of the connection.

[0034] Reference Figure 4 Meanwhile, the second rotating shaft 70 is also limited and fixed by the following structure: a fixing rod 71 is radially inserted through the second rotating shaft 70, the fixing rod 71 is threaded onto the second rotating shaft 70, the second rotating shaft 70 is sleeved on the connecting column 31, and an annular groove 32 is formed on the outer circumference of the connecting column 31. One end of the fixing rod 71 extends into the annular groove 32. After the fixing rod 71 extends into the annular groove 32, it can restrict the axial movement of the second rotating shaft 70. When the fixing rod 71 abuts against the inner bottom wall of the annular groove 32, it can also fix the second rotating shaft 70, ensuring its stability during operation.

[0035] Reference Figure 5The steel pipe connection node structure within the foundation pit also includes a crossbeam 80 for supporting the steel pipe 20. A locking seat 81 is provided on the crossbeam 80, and a locking rod 90 is fixedly connected to the outer wall of the connecting rod 40. When the two connecting rods 40 are connected together, the two second rotating shafts 70 remain coaxial. Rotating the connecting rod 40 allows the locking rod 90 to abut against the locking seat 81 of the crossbeam 80. Alternatively, the locking rod 90 can be engaged with the locking seat 81 by moving the sliding sleeve 30. In this way, the connecting rod 40 forms a connection with the crossbeam 80 through the locking rod 90, allowing part of the load borne by the steel pipe 20 to be transferred to the crossbeam 80 through the locking rod 90, adding an additional support point for the steel pipe 20 and further improving the stability and load-bearing capacity of the entire support structure.

[0036] The implementation principle of the steel pipe connection node structure for foundation pit support in this application embodiment is as follows: By coaxially sliding the sleeve 30 on the steel pipe 20, and using the connecting rod 40 installed on the sleeve 30, in conjunction with the connecting component 50 (such as the combination of connecting rod 51 with flange and bolt 52 and nut 54, or connecting rod 40 with through groove 41 and screw 53 and nut 54), adjacent steel pipes 20 are connected. The first rotating shaft 60 and the second rotating shaft 70 are combined to improve the connection flexibility and accuracy of the connecting rod 40. The clearance groove 42 enhances the connection strength of the connecting rod 40. The fixing rod 71 and the annular groove 32 of the connecting column 31 fix the second rotating shaft 70. The connecting rod 40 increases the support points by cooperating with the crossbeam 80 and the locking seat 81 of the locking rod 90. The axial pressure of a single steel pipe 20 is distributed to multiple steel pipes 20 to share the force, thereby suppressing the bending deformation of the steel pipe 20 and improving the support strength.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A steel pipe connection node structure for internal support in a foundation pit, characterized in that, include: Steel pipe (20). A sliding sleeve (30) is slidably installed on the steel pipe (20), and the sliding sleeve (30) and the steel pipe (20) are coaxial; A connecting assembly (50) is used to connect two adjacent steel pipes (20) and is installed between the two sliding sleeves (30).

2. The steel pipe connection node structure for foundation pit support according to claim 1, characterized in that, The connecting assembly (50) includes a connecting rod (51) and a bolt (52). The sliding sleeve (30) is circumferentially provided with a stiffening plate (301). A first end plate (302) is installed on a portion of the stiffening plate (301). A second end plate (511) is provided at both ends of the connecting rod (51). The first end plate (302) and the second end plate (511) pass through the bolt (52). The bolt (52) is threaded with a nut (54).

3. The steel pipe connection node structure for foundation pit support according to claim 1, characterized in that, The connecting assembly (50) includes a screw (53) and a nut (54). The sliding sleeve (30) is connected to a connecting rod (40). The connecting rod (40) has a through groove (41). The screw (53) passes through the two connecting rods (40) that are in contact with each other through the through groove (41). Both ends of the screw (53) are threadedly connected to the nut (54). The nut (54) abuts against the connecting rod (40).

4. The steel pipe connection node structure for foundation pit support according to claim 3, characterized in that, The connecting rod (40) is connected to a first rotating shaft (60), which is rotatably mounted on the sliding sleeve (30) with its own central axis as the rotation center. The central axis of the first rotating shaft (60) and the central axis of the sliding sleeve (30) are parallel to each other.

5. The steel pipe connection node structure for foundation pit support according to claim 4, characterized in that, The connecting rod (40) has a relief groove (42) on its wall. When the two connecting rods (40) are connected, the end of the connecting rod (40) away from the sliding sleeve (30) is located in the relief groove (42) of the other connecting rod (40), and there is a gap between the end of the connecting rod (40) and the relief groove (42).

6. The steel pipe connection node structure for foundation pit support according to claim 5, characterized in that, A second rotating shaft (70) is rotatably mounted between the first rotating shaft (60) of the connecting rod (40) and the sliding sleeve (30). The second rotating shaft (70) rotates around its own central axis, and the central axis of the second rotating shaft (70) and the axis of the connecting rod (40) are arranged parallel to each other.

7. The steel pipe connection node structure for foundation pit support according to claim 6, characterized in that, It also includes a crossbeam (80) for supporting the steel pipe (20), the crossbeam (80) is provided with a snap-fit ​​seat (81), and a snap-fit ​​rod (90) is fixedly connected to the outer wall of the connecting rod (40). When the connecting rod (40) is rotated, the snap-fit ​​rod (90) snaps onto the snap-fit ​​seat (81).

8. The steel pipe connection node structure for foundation pit support according to claim 7, characterized in that, The second rotating shaft (70) is radially provided with a fixing rod (71), the fixing rod (71) is threaded on the second rotating shaft (70), the outer periphery of the sliding sleeve (30) is fixedly connected with a connecting column (31), the second rotating shaft (70) is sleeved on the connecting column (31) and coaxially arranged, the outer periphery of the connecting column (31) is provided with an annular groove (32), and one end of the fixing rod (71) extends into the annular groove (32).

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