Internal supporting device for steel sheet pile cofferdam

Abstract

The utility model discloses an internal supporting device for a steel sheet pile cofferdam, relates to the field of foundations, solves the problem that an existing supporting device is not safe enough, and adopts the technical scheme that a first placing position is arranged on one surface, back to a second end plate, of a first end plate of the internal supporting device for the steel sheet pile cofferdam; a second placing position is arranged on one surface, back to the first end plate, of the second end plate; an outer pipe and a first rack are fixed to the face, facing the second end plate, of the first end plate, an inner pipe is fixed to the face, facing the first end plate, of the second end plate, a second rack is arranged in the inner pipe, and the inner pipe is inserted into the outer pipe and is in sliding fit with the outer pipe. A first sliding groove is formed in the outer pipe, a second sliding groove is formed in the inner pipe, an adjusting rod is arranged on the overlapping section of the two sliding grooves, clamping teeth are arranged at one end of the adjusting rod and meshed with the first rack and the second rack at the same time, and a locking assembly capable of relatively fixing the adjusting rod and the outer pipe is further arranged between the adjusting rod and the outer pipe. The steel sheet pile supporting device is used for being placed on the tops of two steel sheet piles which are oppositely arranged to support the steel sheet piles.

Description

Technical Field

[0001] This utility model relates to the field of basic science, specifically to an internal support device for steel sheet pile cofferdams used in building construction. Background Technology

[0002] The internal support components of sheet pile cofferdams are typically connected by welding or riveting. This requires specialized personnel for welding and riveting; inadequate manual skills can lead to improper securing and create safety hazards. Furthermore, the support components have a fixed length; adjusting the length necessitates cutting them, which is inconvenient and increases labor time.

[0003] Patent application CN 119801011 A discloses a movable retaining wall and its construction method for pipeline excavation support. The movable retaining wall includes two retaining plates and a support mechanism between them. The support mechanism includes a meshing gear and rack. Rotation of the gear causes the rack to slide, and the rack drives a sliding rod to slide out of a second groove, thus increasing the support length of the support mechanism. The support mechanism also includes a locking component to fix the gear, ensuring the support length remains fixed after adjustment. However, the gear and rack are exposed, making them susceptible to dust and mud buildup during construction, affecting their engagement. More importantly, the exposed gear and rack increase safety hazards when workers rotate the gear. Furthermore, the gear can only drive one sliding rod at a time, resulting in slow adjustment of the support length. Utility Model Content

[0004] This utility model provides an internal support device for steel sheet pile cofferdams, which solves the problem that existing support devices are not safe enough.

[0005] The technical solution adopted in this utility model is as follows: an internal support device for a steel sheet pile cofferdam, comprising a first end plate and a second end plate arranged in parallel. A first fixing member is fixed to the side of the first end plate facing away from the second end plate, forming a first placement position for inserting the steel sheet pile. A second fixing member is fixed to the side of the second end plate facing away from the first end plate, forming a second placement position for inserting the steel sheet pile. An outer tube and a first rack are fixed to the side of the first end plate facing the second end plate, with the first rack suspended inside the outer tube. An inner tube is fixed to the side of the second end plate facing the first end plate, and a second rack is provided on the inner wall of the inner tube, or the second end plate is fixedly connected to the second rack. The second rack is suspended inside the inner tube, and the inner and outer tubes are adapted to each other. The inner tube is inserted into the outer tube, and the inner and outer tubes slide together. The first rack is located inside the inner tube and is parallel to the second rack. The outer tube wall is provided with a first groove, and the inner tube wall is provided with a second groove. The first and second grooves overlap each other. An adjusting rod is provided in the overlapping section of the first and second grooves. The end of the adjusting rod inside the inner tube is provided with a locking tooth that meshes with both the first and second racks. The end of the adjusting rod outside the outer tube is provided with a rotating adjusting structure. A locking component is also provided between the adjusting rod and the outer tube to fix the adjusting rod relative to the outer tube.

[0006] Both the first and second fixing members are used to form the first and second placement positions for inserting the sheet pile. Specifically: a first clamping plate is fixed to the side of the first end plate facing away from the second end plate, and the inside angle formed by the first end plate and the first clamping plate is the first placement position; a second clamping plate is fixed to the side of the second end plate facing away from the first end plate, and the inside angle formed by the second end plate and the second clamping plate is the second placement position; the plane corresponding to the first clamping plate is coplanar with the plane corresponding to the second clamping plate and is perpendicular to the plane corresponding to the first end plate.

[0007] To facilitate the fixed connection between the first clamping plate and the first end plate, and also to facilitate the fixed connection between the second clamping plate and the second end plate, furthermore: the first end plate, the second end plate, the first clamping plate, and the second clamping plate are all rectangular plates; at least one of the four sides of the first end plate is provided with a threaded hole, and the first clamping plate is fixedly connected to one side of the first end plate by screws; at least one of the four sides of the second end plate is provided with a threaded hole, and the second clamping plate is fixedly connected to one side of the second end plate by screws.

[0008] To facilitate the hoisting of the internal support devices of the sheet pile cofferdam, furthermore: the outer side or the first end plate of the outer pipe is equipped with lifting devices, and the outer side or the second end plate of the inner pipe is equipped with lifting devices.

[0009] The rotating adjustment mechanism is used to rotate and adjust the adjusting rod. Specifically, the end of the adjusting rod located outside the outer tube is shaped like a regular hexagonal prism.

[0010] To prevent relative rotation between the inner and outer tubes and improve their stability, the inner and outer tubes are further designed to be polygonal in cross-section. For example, both the inner and outer tubes are rectangular tubes.

[0011] To further improve the stability between the inner and outer tubes, dovetail protrusions and dovetail grooves are also provided between the inner and outer tubes, with the extension direction of the dovetail protrusions and dovetail grooves being consistent with the length direction of the inner and outer tubes.

[0012] By rotating the adjusting rod through the adjusting structure, the distance between the first and second end plates can be adjusted. The adjusting rod is then fixed in place by a locking assembly, preventing rotation and maintaining a constant distance between the first and second end plates. Furthermore, a retaining sleeve is fixed to one end of the adjusting rod outside the outer tube. A limiting ring is provided between the retaining sleeve and the outer tube, passing through the outer circumference of the adjusting rod. Both ends of the limiting ring abut against the retaining sleeve and the outer tube, respectively. A limiting pin is provided between the retaining sleeve and the outer tube.

[0013] To facilitate the assembly of the limiting ring and the ferrule, the ferrule is further fixed to the adjusting rod by a fixing bolt, which is perpendicular to the adjusting rod, and the limiting pin passes through the limiting ring.

[0014] The beneficial effects of this utility model are as follows: A first placement position and a second placement position are respectively provided on the outer sides of the first end plate and the second end plate, allowing the internal support device of the sheet pile cofferdam to be placed between the tops of the relatively arranged sheet piles. The locking teeth of the adjusting rod, the first rack, and the second rack are all built into the inner tube, rather than exposed, improving safety during use. By rotating the adjusting structure to rotate the adjusting rod, the locking teeth of the adjusting rod simultaneously drive the first rack and the second rack to move in opposite directions, increasing or decreasing the distance between the first end plate and the second end plate. This allows for rapid adjustment of the distance between the first placement position and the second placement position, thereby quickly adjusting the support length. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of one embodiment of the present invention.

[0016] Figure 2 yes Figure 1 A magnified view of region A in the middle.

[0017] Figure 3 yes Figure 1 The illustrated embodiment is a three-dimensional structural diagram after being cut by a section passing through the center line of the adjusting rod and parallel to the first end plate.

[0018] Figure 4 yes Figure 3 A magnified view of region B in the middle.

[0019] Figure 5 yes Figure 1 The illustrated embodiment is a three-dimensional structural diagram after being cut off by a section passing through the center line of the adjusting rod and perpendicular to the first end plate.

[0020] Figure 6 yes Figure 5 A three-dimensional structural diagram of the first end plate and other structures fixed to the first end plate.

[0021] Figure 7 yes Figure 5 A three-dimensional structural diagram of the second end plate and other structures fixed to the second end plate.

[0022] Reference numerals in the attached drawings: 1. First end plate; 2. Second end plate; 3. First fixing component; 4. Second fixing component; 5. Outer tube; 5-1. First sliding groove; 5-2. Dovetail protrusion; 6. First rack; 7. Inner tube; 7-1. Second sliding groove; 7-2. Dovetail groove; 8. Second rack; 9. Adjusting rod; 9-1. Clamping tooth; 9-2. Rotation adjustment structure; 10. Screw; 11. Lifting component; 12. Sleeve; 13. Limiting ring; 14. Limiting pin; 15. Fixing bolt. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] This utility model relates to an internal support device for steel sheet pile cofferdams, which is placed on top of two oppositely arranged steel sheet piles to support them from inside the cofferdam. Figure 1 As shown, the internal support device of the steel sheet pile cofferdam includes a first end plate 1 and a second end plate 2 arranged in parallel.

[0025] A first fixing member 3 is fixed to the side of the first end plate 1 facing away from the second end plate 2, forming a first placement position for inserting the sheet pile. The first placement position is used to insert the top of the sheet pile. The first fixing member 3 can form the first placement position alone or together with the first end plate 1. For example, see... Figure 1 A first clamping plate is fixed to the side of the first end plate 1 facing away from the second end plate 2; that is, the first fixing member 3 is the first clamping plate. The inside angle formed by the first end plate 1 and the first clamping plate is the first placement position. The first clamping plate is fixedly connected to the first end plate 1, for example, by welding, bolting, or screwing. For easier fixing of the first clamping plate to the first end plate 1, see [link to documentation]. Figure 1Both the first end plate 1 and the first clamping plate are rectangular plates. At least one of the four sides of the first end plate 1 is provided with threaded holes, with at least two threaded holes on each side. The first clamping plate is fixedly connected to one side of the first end plate 1 by screws 10. Providing threaded holes on two or more of the four sides of the first end plate 1 facilitates adjustment of the position of the first clamping plate, thereby adjusting the direction of the first slide groove 5-1. For example, threaded holes are provided on each of the four sides of the first end plate 1, with at least two threaded holes on each side arranged in a straight line, and the spacing and number of threaded holes on each side are consistent.

[0026] A second fixing member 4 is fixed to the side of the second end plate 2 facing away from the first end plate 1, forming a second placement position for inserting the sheet pile. The second placement position is used to insert the top of the sheet pile. The second fixing member 4 can form the second placement position independently or together with the second end plate 2. For example, see... Figure 1 A second clamping plate is fixed to the side of the second end plate 2 facing away from the first end plate 1; that is, the second fixing member 4 is the second clamping plate. The inside angle formed by the second end plate 2 and the second clamping plate is the second placement position. The second clamping plate is fixedly connected to the second end plate 2, for example, by welding, bolting, or screwing. For easier fixing of the second clamping plate to the second end plate 2, see [link to documentation]. Figure 1 Both the second end plate 2 and the second clamping plate are rectangular plates. At least one of the four sides of the second end plate 2 is provided with threaded holes, with at least two threaded holes on each side. The second clamping plate is fixedly connected to one side of the second end plate 2 by screws 10. The threaded holes on two or more of the four sides of the second end plate 2 facilitate adjustment of the position of the second clamping plate, thereby adjusting the direction of the second slide groove 7-1. For example, threaded holes are provided on each of the four sides of the second end plate 2, with at least two threaded holes on each side arranged in a straight line, and the spacing and number of the threaded holes on each side are consistent.

[0027] An outer tube 5 and a first rack 6 are fixed to the side of the first end plate 1 facing the second end plate 2. The first rack 6 is suspended inside the outer tube 5, and the length direction of the first rack 6 is parallel to the center line direction of the outer tube 5. Figure 7 As shown. An inner tube 7 is fixed to the side of the second end plate 2 facing the first end plate 1. A second rack 8 is provided on the inner wall of the inner tube 7; that is, the second rack 8 and the inner tube 7 are a single unit. Figure 7 As shown; or, the second end plate 2 is fixedly connected to the second rack 8, and the second rack 8 is suspended inside the inner tube 7, that is, the second rack 8 and the inner tube 7 are not a single unit. Regardless of the arrangement of the second rack 8, the length direction of the second rack 8 is parallel to the centerline direction of the inner tube 7. The inner tube 7 and the outer tube 5 are mutually adapted, with the inner tube 7 inserted inside the outer tube 5, and there is a sliding fit between the inner tube 7 and the outer tube 5. The first rack 6 is located inside the inner tube 7 and is parallel to the second rack 8, with a gap between the first rack 6 and the second rack 8.

[0028] The outer tube 5 has a first groove 5-1 on its wall, and the inner tube 7 has a second groove 7-1 on its wall. The first groove 5-1 and the second groove 7-1 overlap. Both the first groove 5-1 and the second groove 7-1 are straight. The extension direction of the first groove 5-1 is parallel to the centerline of the outer tube 5, and the extension direction of the second groove 7-1 is parallel to the centerline of the inner tube 7. The widths of the first groove 5-1 and the second groove 7-1 are equal. An adjusting rod 9 is provided at the overlapping section of the first groove 5-1 and the second groove 7-1. The diameter of the adjusting rod 9 is the same as the width of the first groove 5-1 and the second groove 7-1. One end of the adjusting rod 9 located inside the inner tube 7 has a locking tooth 9-1 that simultaneously engages with the first rack 6 and the second rack 8. For example, the locking tooth 9-1 at one end of the adjusting rod 9 is cross-shaped. The other end of the adjusting rod 9 located outside the outer tube 5 has a rotating adjusting structure 9-2, which is used to rotate the adjusting rod 9 in conjunction with other tools. For example, see... Figure 2 The adjusting rod 9, located outside the outer tube 5, has a hexagonal prism shape at one end and can be rotated using tools such as wrenches or screwdrivers. Rotating the adjusting rod 9 causes the locking teeth 9-1 to simultaneously drive the first rack 6 and the second rack 8 to move linearly in opposite directions. The total length of the first rack 6 and the second rack 8 is correspondingly increased or decreased, and the distance between the first end plate 1 and the second end plate 2 is correspondingly increased or decreased. This allows for rapid adjustment of the distance between the first and second placement positions, i.e., rapid adjustment of the support length of this invention.

[0029] After the internal support device of the sheet pile cofferdam is placed on top of the two relatively arranged sheet piles, the opening direction of the first chute 5-1 and the second chute 7-1 should preferably be downward or horizontal to prevent soil from entering the first chute 5-1 and the second chute 7-1.

[0030] After the distance between the first end plate 1 and the second end plate 2 is adjusted, the adjusting rod 9 needs to be fixed to prevent it from rotating, thus keeping the distance between the first and second placement positions constant. Therefore, a locking assembly is also provided between the adjusting rod 9 and the outer tube 5 to fix the adjusting rod 9 and the outer tube 5 relative to each other. For example, see... Figures 2-7A retaining sleeve 12 is fixed to one end of the adjusting rod 9 outside the outer tube 5. For example, the retaining sleeve 12 is fixed to the adjusting rod 9 by a fixing bolt 15, which passes through the retaining sleeve 12 and the adjusting rod 9. The retaining sleeve 12 passes through the outer circumference of the adjusting rod 9 and is fixed to the adjusting rod 9 by the fixing bolt 15, facilitating the installation and removal of the retaining sleeve 12. A limiting ring 13 is provided between the retaining sleeve 12 and the outer tube 5. The limiting ring 13 passes through the outer circumference of the adjusting rod 9, and its two ends abut against the retaining sleeve 12 and the outer tube 5, respectively. A limiting pin 14 is provided between the retaining sleeve 12 and the outer tube 5. The outer tube 5 has a limiting hole, and the limiting pin 14 is inserted into the limiting hole of the outer tube 5. The limiting pin 14 prevents the retaining sleeve 12 and the adjusting rod 9 from rotating, thereby fixing the adjusting rod 9. To make the limiting pin 14 more stable, the limiting ring 13 also has a through hole through which the limiting pin 14 passes.

[0031] The limiting ring 13 has two parallel sides on its outer circumference. Before rotating the adjusting rod 9, the limiting ring 13 is first clamped with a tool. Then, the adjusting rod 9 is rotated by rotating the adjusting structure 9-2. The clamping teeth 9-1 of the adjusting rod 9 rotate and drive the first rack 6 and the second rack 8 to move, thereby adjusting the distance between the first and second placement positions. After the distance between the first and second placement positions is adjusted to the correct position, the limiting pin 14 is first inserted, and then the limiting pin 14 abuts against the fixing bolt 15, preventing the adjusting rod 9 from rotating.

[0032] To facilitate the hoisting of the internal support devices of the sheet pile cofferdam, lifting components 11 are provided on the outer side of the outer pipe 5 or the first end plate 1, and on the outer side of the inner pipe 7 or the second end plate 2. The lifting components 11 are lifting rings, hooks, or lugs. For example, if both the inner pipe 7 and the outer pipe 5 are rectangular pipes, a lifting component 11 is provided on each of the four outer sides of the inner pipe 7 and the outer pipe 5. When the lifting component 11 is located on the inner pipe 7, it is preferably positioned close to the second end plate 2; when the lifting component 11 is located on the outer pipe 5, it is preferably positioned close to the first end plate 1.

[0033] To prevent relative rotation between the inner tube 7 and the outer tube 5, which would increase the difficulty of aligning the first and second sliding grooves 5-1, the inner tube 7 and the outer tube 5 are polygonal in cross-section, and both are rectangular tubes. To improve the stability between the inner tube 7 and the outer tube 5, dovetail protrusions 5-2 and dovetail grooves 7-2 are also provided between them, with the extension directions of the dovetail protrusions 5-2 and dovetail grooves 7-2 consistent with the length directions of the inner tube 7 and the outer tube 5.

Claims

1. An internal support device for a steel sheet pile cofferdam, comprising a first end plate (1) and a second end plate (2) arranged in parallel, wherein a first fixing member (3) is fixed to the side of the first end plate (1) facing away from the second end plate (2) to form a first placement position for inserting steel sheet piles, and a second fixing member (4) is fixed to the side of the second end plate (2) facing away from the first end plate (1) to form a second placement position for inserting steel sheet piles; characterized in that: The first end plate (1) has an outer tube (5) and a first rack (6) fixed on the side facing the second end plate (2). The first rack (6) is suspended inside the outer tube (5). The second end plate (2) has an inner tube (7) fixed on the side facing the first end plate (1). The inner wall of the inner tube (7) is provided with a second rack (8). Alternatively, the second end plate (2) is fixedly connected to the second rack (8) and the second rack (8) is suspended inside the inner tube (7). The inner tube (7) and the outer tube (5) are adapted to each other. The inner tube (7) is inserted into the outer tube (5). The inner tube (7) and the outer tube (5) are in sliding fit. The first rack (6) is located inside the inner tube (7) and is parallel to the second rack (8). The outer tube (5) has a first groove (5-1) on its wall and the inner tube (7) has a second groove (7-1) on its wall. The first groove (5-1) and the second groove (7-1) overlap each other. An adjusting rod (9) is provided at the overlapping section of the first groove (5-1) and the second groove (7-1). The end of the adjusting rod (9) located inside the inner tube (7) is provided with a locking tooth (9-1) and simultaneously engages with the first rack (6) and the second rack (8). The end of the adjusting rod (9) located outside the outer tube (5) is provided with a rotating adjusting structure (9-2). A locking component is also provided between the adjusting rod (9) and the outer tube (5) to fix the adjusting rod (9) and the outer tube (5) relative to each other.

2. The internal support device for a steel sheet pile cofferdam as described in claim 1, characterized in that: A first clamping plate is fixed on the side of the first end plate (1) facing away from the second end plate (2). The inside angle formed by the first end plate (1) and the first clamping plate is the first placement position. A second clamping plate is fixed on the side of the second end plate (2) facing away from the first end plate (1). The inside angle formed by the second end plate (2) and the second clamping plate is the second placement position. The plane corresponding to the first clamping plate is coplanar with the plane corresponding to the second clamping plate and is perpendicular to the plane corresponding to the first end plate (1).

3. The internal support device for a steel sheet pile cofferdam as described in claim 2, characterized in that: The first end plate (1), the second end plate (2), the first clamping plate and the second clamping plate are all rectangular plates. At least one of the four sides of the first end plate (1) is provided with a threaded hole. The first clamping plate is fixedly connected to one side of the first end plate (1) by a screw (10). At least one of the four sides of the second end plate (2) is provided with a threaded hole. The second clamping plate is fixedly connected to one side of the second end plate (2) by a screw (10).

4. The internal support device for a steel sheet pile cofferdam as described in claim 1, characterized in that: Lifting member (11) is provided on the outer side of the outer tube (5) or the first end plate (1), and lifting member (11) is provided on the outer side of the inner tube (7) or the second end plate (2).

5. The internal support device for a steel sheet pile cofferdam as described in claim 1, characterized in that: The end of the adjusting rod (9) located outside the outer tube (5) is in the shape of a regular hexagonal prism.

6. The internal support device for a steel sheet pile cofferdam as described in claim 1, characterized in that: The inner tube (7) and the outer tube (5) are polygonal in cross-section.

7. The internal support device for a steel sheet pile cofferdam as described in claim 6, characterized in that: Both the inner tube (7) and the outer tube (5) are rectangular tubes.

8. The internal support device for a steel sheet pile cofferdam as described in any one of claims 1 to 7, characterized in that: A dovetail groove (7-2) and a dovetail protrusion (5-2) that are mutually compatible are also provided between the inner tube (7) and the outer tube (5). The extension direction of the dovetail protrusion (5-2) and the dovetail groove (7-2) is consistent with the length direction of the inner tube (7) and the outer tube (5).

9. The internal support device for a steel sheet pile cofferdam as described in any one of claims 1 to 7, characterized in that: A retaining sleeve (12) is fixed at one end of the adjusting rod (9) outside the outer tube (5). A limiting ring (13) is provided between the retaining sleeve (12) and the outer tube (5). The limiting ring (13) passes through the outer circumference of the adjusting rod (9). The two ends of the limiting ring (13) abut against the retaining sleeve (12) and the outer tube (5) respectively. A limiting pin (14) is provided between the retaining sleeve (12) and the outer tube (5).

10. The internal support device for a steel sheet pile cofferdam as described in claim 9, characterized in that: The ferrule (12) is fixed to the adjusting rod (9) by the fixing bolt (15). The fixing bolt (15) and the adjusting rod (9) are perpendicular to each other. The limiting pin (14) passes through the limiting ring (13).

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