Recyclable super-deep foundation pit steel structure supporting device

Abstract

The application belongs to the technical field of steel structure supporting device, and particularly relates to a recyclable steel structure supporting device for super-deep foundation pit, which comprises a fixed section, an intermediate section, a movable section and a hoisting clamp, the fixed section, the intermediate section and the movable section are sequentially connected through bolts, the intermediate section comprises two connecting barrels, the two connecting barrels are hingedly connected, a protective rope is arranged between the two connecting barrels, flanges are arranged on opposite surfaces of the two connecting barrels, the hoisting clamp comprises a connecting assembly and two lifting ring clamping plates, the two lifting ring clamping plates are connected through alignment telescopic cylinders, each connecting barrel is provided with a lifting ring clamping plate, and the two lifting ring clamping plates are connected with the corresponding connecting barrels through the connecting assembly; the intermediate section is designed to be hingedly connected through double connecting barrels, the included angle is controlled through the alignment telescopic cylinders during hoisting, the space occupied by the supporting device in the transverse direction is reduced, the gap between the two ends of the supporting device and the side wall of the foundation pit is increased, hoisting bumping is avoided, and the narrow space is adapted.

Description

Technical Field

[0001] This invention belongs to the technical field of steel structure support devices, specifically relating to a recyclable ultra-deep foundation pit steel structure support device. Background Technology

[0002] In ultra-deep foundation pit support projects, steel supports are widely used due to their high load-bearing capacity and rigidity. Traditional steel supports need to be assembled into a whole on the ground and then hoisted into the foundation pit. However, due to the narrow space in the foundation pit, the support length is usually close to the width of the foundation pit.

[0003] During hoisting, the distance between the two ends of the support and the sidewalls of the pit is extremely small (usually less than 0.5 meters), making it highly susceptible to collisions with the retaining structure, leading to support deformation or damage to the pit structure. Furthermore, installation and dismantling require manual climbing to the suspended steel supports to attach and remove hoisting ropes, posing a risk of falls from height, resulting in low operational efficiency and poor safety. Existing improvement plans attempt segmented hoisting or the addition of guiding devices, but segmented hoisting requires secondary assembly within the pit, increasing the construction period and welding risks; guiding devices, on the other hand, cannot solve the problem of insufficient operating space at the end.

[0004] Therefore, there is an urgent need for a support device that can be hoisted as a whole and reduces manual high-altitude operations, so as to improve the safety and efficiency of ultra-deep foundation pit support construction. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a recyclable steel structure support device for ultra-deep foundation pits, which can be easily hoisted into ultra-deep foundation pits.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A recyclable steel structure support device for ultra-deep foundation pits includes a fixed section, an intermediate section, a movable section, and a lifting clamp. The fixed section, intermediate section, and movable section are sequentially connected by bolts. The intermediate section includes two connecting cylinders. The two connecting cylinders are hinged together, and a protective rope is provided between the two connecting cylinders. Flanges are provided on the opposite faces of the two connecting cylinders.

[0008] The lifting clamp includes a connecting assembly and two lifting eye plates, which are connected by an alignment telescopic cylinder; each connecting cylinder corresponds to one lifting eye plate, and the two lifting eye plates are respectively connected to the corresponding connecting cylinder through the connecting assembly.

[0009] The connecting assembly includes a lifting pin and a fixing pin; a fixing lug is fixed on the connecting cylinder, and a connecting lug is fixed on the lifting ring plate; the fixing pin is inserted into both the fixing lug and the connecting lug; the lifting pin is slidably connected to the connecting lug, and a first spring is provided between the lifting pin and the connecting lug; a connecting rod that is inserted into the fixing pin is fixedly connected to the lifting pin; a connecting frame is fixedly connected to the fixing pin, and the connecting frame is slidably connected to the lifting ring plate through a spring telescopic rod.

[0010] The spring telescopic rod includes an outer rod and an inner rod. The inner rod is slidably connected to the outer rod. The inner rod is located inside the outer rod and one end of the inner rod extends through the outer rod. A second spring is provided between the inner rod and the outer rod. The outer rod is slidably connected to the lifting ring plate, and the connecting frame is fixedly connected to the outer rod.

[0011] One end of the inner rod is fixedly connected to a contact head.

[0012] The protective rope has a protective sleeve in the middle.

[0013] The fixed section includes a fixed section and a first extended section, which are connected by bolts.

[0014] The movable section includes a movable section and a second extended section, which are connected by bolts.

[0015] The movable section includes a support base and a movable cylinder, the support base and the movable cylinder are slidably connected, and an adjusting telescopic cylinder is provided between the support base and the movable cylinder.

[0016] A top plate is fixedly connected to the support base; a support sleeve is rotatably connected to the movable cylinder, and the support sleeve has an inclined surface that cooperates with the top plate; a support telescopic cylinder is provided between the support sleeve and the movable cylinder.

[0017] The second extension section is hinged with a hook; a limiting plate that restricts the opening of the hook is slidably connected to the second extension section; one end of the hook is provided with an extension plate that cooperates with the limiting plate.

[0018] The limiting plate is fixedly connected to the support sleeve via a support plate.

[0019] Compared with the prior art, the beneficial effects of this invention are:

[0020] The intermediate section adopts a double connecting cylinder hinge design. During hoisting, the included angle is controlled by the alignment telescopic cylinder, which reduces the space occupied by the support device in the lateral direction. This increases the gap between the two ends of the support device and the side wall of the pit, avoids collisions during hoisting, and is suitable for narrow spaces.

[0021] The lifting clamp integrates a spring telescopic rod and a pin linkage mechanism: After installation, when the crane is withdrawn, the lifting pin is pulled by the rope, triggering the separation of the connecting rod from the fixed pin; the spring telescopic rod automatically releases its elastic force, pushing the fixed pin away from the ear plate, thus realizing the separation of the lifting clamp from the connecting cylinder.

[0022] A protective rope (with a rubber protective sleeve) is installed to limit the hinge angle and prevent the two connecting cylinders from folding together when the positioning telescopic cylinder fails, thus providing protection.

[0023] Axial thrust is provided by adjusting the telescopic cylinder. In case of failure, the inclined surface of the support sleeve automatically abuts against the top plate to maintain the support force. The hook and limit plate are linked. After the support is in place, the limit plate is rotated by the support telescopic cylinder to automatically unlock the hook, reducing manual intervention. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0026] Figure 3 yes Figure 1 A magnified view of a section at point B in the middle;

[0027] Figure 4 This is a schematic diagram of the lifting clamp of the present invention;

[0028] Figure 5 yes Figure 4 Front view of the structure shown;

[0029] Figure 6 This is a schematic diagram of the hoisting process of the present invention;

[0030] Figure 7 yes Figure 6 A magnified view of a section at point C;

[0031] Figure 8 This is a schematic diagram of the crane withdrawal process of the present invention;

[0032] Figure 9 This is a schematic diagram of the connection structure between the present invention and the waler;

[0033] Figure 10 This is a cross-sectional view of the spring telescopic rod of the present invention;

[0034] Figure 11 This is a schematic diagram of the connection structure between the hook and the limiting plate of the present invention;

[0035] Wherein: 1 is the fixed section, 10 is the fixed segment, 11 is the first extended segment, 2 is the intermediate segment, 20 is the connecting cylinder, 21 is the fixed lug plate, 3 is the movable section, 30 is the movable segment, 300 is the support base, 301 is the movable cylinder, 302 is the adjusting telescopic cylinder, 303 is the top plate, 304 is the support sleeve, 3040 is the inclined surface, 305 is the supporting telescopic cylinder, 306 is the limiting plate, 307 is the support plate, 31 is the second extended segment, 310 is the hook, 31... 1 is the extension plate, 4 is the lifting clamp, 40 is the connecting assembly, 400 is the lifting pin, 401 is the fixing pin, 402 is the connecting frame, 403 is the connecting ear plate, 404 is the first spring, 405 is the plug rod, 41 is the lifting ring clamp, 42 is the alignment telescopic cylinder, 43 is the spring telescopic rod, 430 is the outer rod, 431 is the inner rod, 432 is the second spring, 433 is the contact head, 5 is the protective rope, 50 is the protective sleeve, 6 is the rope, and 7 is the waler. Detailed Implementation

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0037] like Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, a recyclable ultra-deep foundation pit steel structure support device includes a fixed section 1, an intermediate section 2, a movable section 3, and a hoisting clamp 4. The fixed section 1, the intermediate section 2, and the movable section 3 are connected in sequence by bolts.

[0038] The intermediate section 2 includes two connecting cylinders 20; the two connecting cylinders 20 are hinged together, and during hoisting, there is an included angle (less than 180°) between the two connecting cylinders 20, which can shorten the overall length of this support device and facilitate hoisting. Flanges are provided on the opposite faces of the two connecting cylinders 20; after being hoisted into the foundation pit by a crane, the two flanges are connected by bolts, so that the included angle between the two connecting cylinders 20 is 180°.

[0039] A protective rope 5 is provided between the two connecting cylinders 20, with both ends of the protective rope 5 fixedly connected to the connecting cylinders 20. The protective rope 5 can prevent the included angle between the two connecting cylinders 20 from being too small, thus serving as a limiting function.

[0040] The lifting clamp 4 includes a connecting assembly 40 and two lifting eye plates 41. Each connecting cylinder 20 corresponds to one lifting eye plate 41. The two lifting eye plates 41 are connected to their respective connecting cylinders 20 via the connecting assembly 40. The two lifting eye plates 41 are connected by an alignment telescopic cylinder 42. The two ends of the alignment telescopic cylinder 42 are hinged to the lifting eye plates 41. The angle between the two connecting cylinders 20 can be changed by extending and retracting the alignment telescopic cylinder 42.

[0041] The connecting assembly 40 includes a lifting pin 400 and a fixing pin 401. A fixing lug 21 is fixed on the connecting cylinder 20, and a connecting lug 403 is fixed on the lifting eye plate 41. The fixing pin 401 is inserted into the fixing lug 21 and the connecting lug 403. Specifically, to improve the connection strength, a raised ring is provided on the connecting cylinder 20, and a corresponding groove is provided on the lifting eye plate 41.

[0042] The lifting pin 400 is slidably connected to the connecting ear plate 403. A first spring 404 is provided between the lifting pin 400 and the connecting ear plate 403, and the two ends of the first spring 404 are fixedly connected to the lifting pin 400 and the connecting ear plate 403 respectively. A plug rod 405 that plugs into the fixed pin 401 is fixedly connected to the lifting pin 400. A connecting frame 402 is fixedly connected to the fixed pin 401, and the connecting frame 402 is slidably connected to the lifting ring plate 41 through a spring telescopic rod 43.

[0043] like Figure 6 , Figure 7 and Figure 9 As shown, the hoisting process is as follows: First, the fixed section 1, intermediate section 2, and movable section 3 are connected sequentially using bolts. Two ropes 6 are installed on the crane. One rope 6 is attached to both ends of the fixed section 1 and the movable section 3; the other rope 6 is attached to both ends of the lifting pins 400 of the two connecting components 40. During hoisting, the two connecting cylinders 20 are in a hinged state, the alignment telescopic cylinder 42 is in an extended state, and the other rope 6 is in a slack state.

[0044] The support device is lowered into the deep foundation pit using a crane. Because of the included angle between the two connecting cylinders 20, the overall length of the support device can be shortened, increasing the distance between the two ends of the support device and the sides of the foundation pit, effectively preventing collisions and facilitating lifting. When lowered to the waler 7, the alignment telescopic cylinder 42 retracts, making the included angle between the two connecting cylinders 20 180°, and then they are connected with bolts. Afterwards, the fixed section 1 and the movable section 3 are fixedly connected to the waler 7 by bolts or welding, completing the installation; and the ropes 6 attached to the fixed section 1 and the movable section 3 are manually loosened.

[0045] After installation, the spring telescopic rods 43 in the two connecting components 40 are in contact with each other and are compressed, applying a pushing force to the connecting frame 402 and the fixing pin 401. However, since the insertion rod 405 on the lifting pin 400 is still in the insertion state with the fixing pin 401 at this time, the fixing pin 401 and the connecting frame 402 cannot be pushed.

[0046] like Figure 8As shown, during the crane's withdrawal process, another rope 6 pulls the lifting pin 400 upwards, causing the connecting rod 405 to separate from the fixed pin 401. At this time, the two spring telescopic rods 43 release elastic potential energy, pushing the connecting frame 402 and the fixed pin 401 to move, causing the fixed pin 401 to separate from the fixed ear plate 21 and the connecting ear plate 403. That is, the lifting clamp 4 can also be withdrawn during the crane's withdrawal process; therefore, the lifting clamp 4 can be used for the next lifting operation after it is withdrawn.

[0047] During the dismantling and recycling process, first, the lifting clamp 4 is hoisted in and connected to the intermediate section 2; then, the two ends of one of the ropes 6 are tied to the fixed section 1 and the movable section 3. Next, the connecting bolts between the two connecting cylinders 20 are removed; the alignment telescopic cylinder 42 extends to reduce the included angle between the two connecting cylinders 20. Finally, the entire assembly is lifted out using a crane.

[0048] The above-described structure facilitates hoisting operations; furthermore, during withdrawal, there is no need for manual separation of the hoisting clamp 4 from the connecting cylinder 20, eliminating operational steps. Moreover, thanks to the structure of the lifting pin 400, the connecting assembly 40 can only be separated from the connecting cylinder 20 when the crane is withdrawn.

[0049] Furthermore, such as Figure 10 As shown, the spring telescopic rod 43 includes an outer rod 430 and an inner rod 431. The inner rod 431 is slidably connected to the outer rod 430, and one end of the inner rod 431 extends through the outer rod 430. A second spring 432 is provided between the inner rod 431 and the outer rod 430. The outer rod 430 is slidably connected to the lifting ring plate 41, and the connecting frame 402 is fixedly connected to the outer rod 430. During hoisting, the gap between the two spring telescopic rods 43 is large, and the inner rods 431 of each are in the extended state, so the second spring 432 is not compressed. However, when the included angle between the two connecting cylinders 20 is 180°, the inner rods 431 of the two spring telescopic rods 43 abut against each other, causing the second spring 432 to be compressed.

[0050] To increase the contact range, a contact head 433 is fixedly connected to one end of the inner rod 431.

[0051] Furthermore, such as Figure 3 , Figure 6 and Figure 7 As shown, a protective sleeve 50 is provided in the middle of the protective rope 5. The protective sleeve 50 can be made of rubber. The main purpose of the protective rope 5 is to limit the included angle between the two connecting cylinders 20; to prevent the two connecting cylinders 20 from folding together when the alignment telescopic cylinder 42 fails, thus providing protection. The protective sleeve 50 can prevent unnecessary scratches on the surface of the connecting cylinders 20.

[0052] Furthermore, such as Figure 1As shown, the fixed section 1 includes a fixed section 10 and a first extension section 11, which are connected by bolts. The number of first extension sections 11 can be set according to actual conditions, thereby increasing the overall length of the support device.

[0053] Furthermore, such as Figure 1 As shown, the movable section 3 includes a movable section 30 and a second extended section 31, which are connected by bolts. Similarly, the number of second extended sections 31 can be set according to actual conditions. To ensure hoisting balance, the number of second extended sections 31 used is the same as that of the first extended section 11.

[0054] Furthermore, such as Figure 2 and Figure 9 As shown, the movable section 30 includes a support base 300 and a movable cylinder 301. The support base 300 and the movable cylinder 301 are slidably connected, and an adjusting telescopic cylinder 302 is provided between the support base 300 and the movable cylinder 301. By adjusting the extension of the telescopic cylinder 302, the device can apply a thrust (axial force) to the waler 7, thereby playing a supporting role.

[0055] A top plate 303 is fixedly connected to the support base 300; a support sleeve 304 is rotatably connected to the movable cylinder 301, and the support sleeve 304 has an inclined surface 3040 that mates with the top plate 303; a support telescopic cylinder 305 is provided between the support sleeve 304 and the movable cylinder 301, and the two ends of the support telescopic cylinder 305 are hinged to the support sleeve 304 and the movable cylinder 301 respectively. The rotation of the support sleeve 304 is achieved by the extension and retraction of the support telescopic cylinder 305.

[0056] When the adjusting telescopic cylinder 302 extends to apply thrust, the supporting telescopic cylinder 305 extends, causing the supporting sleeve 304 to rotate until its inclined surface 3040 contacts (aggregates) the end of the top plate 303, thus providing protection. When the adjusting telescopic cylinder 302 fails, the top plate 303 abuts against the supporting sleeve 304, ensuring that the device can still apply thrust (axial force) to the waler 7.

[0057] Furthermore, such as Figure 2 and Figure 11 As shown, a hook 310 is hinged to the second extension section 31; a lifting hole is provided on the first extension section 11; and each of the ropes 6 has corresponding hooks at both ends. The hooks can be hooked into the corresponding hook 310 or lifting hole.

[0058] A limiting plate 306, which restricts the opening of the hook 310, is slidably connected to the second extension section 31; one end of the hook 310 is provided with an extension plate 311 that cooperates with the limiting plate 306. In the hoisting state, the extension plate 311 is located below the limiting plate 306. After the hoisting is completed, the limiting plate 306 is pushed away from the extension plate 311; at this time, the hook 310 can rotate freely; by pulling the rope 6 with the crane, the hook is disengaged from the hook 310.

[0059] The limiting plate 306 is fixedly connected to the supporting sleeve 304 via the supporting plate 307. After the hoisting is completed and the telescopic cylinder 302 extends to apply thrust, the supporting telescopic cylinder 305 extends, allowing the supporting sleeve 304 and the limiting plate 306 to rotate together, thereby unlocking the hook 310. Therefore, manual operation is only required to remove the rope 6 connected to the first extension section 11, effectively reducing manual labor.

[0060] The above description only illustrates preferred embodiments of the present invention, but the present invention is not limited to the above embodiments.

Claims

1. A recyclable steel structure support device for ultra-deep foundation pits, characterized in that: The system includes a fixed section (1), an intermediate section (2), a movable section (3), and a lifting clamp (4). The fixed section (1), intermediate section (2), and movable section (3) are connected in sequence by bolts. The intermediate section (2) includes two connecting cylinders (20). The two connecting cylinders (20) are hinged together, and a protective rope (5) is provided between the two connecting cylinders (20). Flanges are provided on the opposite sides of the two connecting cylinders (20). The lifting clamp (4) includes a connecting assembly (40) and two lifting ring plates (41). The two lifting ring plates (41) are connected by a positioning telescopic cylinder (42). Each connecting cylinder (20) corresponds to one lifting ring plate (41), and the two lifting ring plates (41) are respectively connected to the corresponding connecting cylinder (20) through the connecting assembly (40). The connecting assembly (40) includes a lifting pin (400) and a fixing pin (401); a fixing ear plate (21) is fixed on the connecting cylinder (20), and a connecting ear plate (403) is fixed on the lifting ring plate (41). The fixing pin (401) is inserted into the fixing ear plate (21) and the connecting ear plate (403); the lifting pin (400) is slidably connected to the connecting ear plate (403), and a first spring (404) is provided between the lifting pin (400) and the connecting ear plate (403); a plug rod (405) is fixedly connected to the lifting pin (400) and inserted into the fixing pin (401); a connecting frame (402) is fixedly connected to the fixing pin (401), and the connecting frame (402) is slidably connected to the lifting ring plate (41) through a spring telescopic rod (43).

2. The recyclable ultra-deep foundation pit steel structure support device according to claim 1, characterized in that: The spring telescopic rod (43) includes an outer rod (430) and an inner rod (431). The inner rod (431) is slidably connected to the outer rod (430). The inner rod (431) is located inside the outer rod (430) and one end of the inner rod (431) extends through the outer rod (430). A second spring (432) is provided between the inner rod (431) and the outer rod (430). The outer rod (430) is slidably connected to the lifting ring plate (41), and the connecting frame (402) is fixedly connected to the outer rod (430).

3. The recyclable ultra-deep foundation pit steel structure support device according to claim 2, characterized in that: One end of the inner rod (431) is fixedly connected to a contact head (433).

4. The recyclable ultra-deep foundation pit steel structure support device according to claim 1, characterized in that: The protective rope (5) is provided with a protective sleeve (50) in the middle.

5. The recyclable ultra-deep foundation pit steel structure support device according to claim 1, characterized in that: The fixed section (1) includes a fixed section (10) and a first extension section (11), which are connected by bolts.

6. The recyclable ultra-deep foundation pit steel structure support device according to claim 1, characterized in that: The movable section (3) includes a movable section (30) and a second extension section (31), which are connected by bolts.

7. A recyclable ultra-deep foundation pit steel structure support device according to claim 6, characterized in that: The movable section (30) includes a support base (300) and a movable cylinder (301). The support base (300) and the movable cylinder (301) are slidably connected. An adjusting telescopic cylinder (302) is provided between the support base (300) and the movable cylinder (301).

8. A recyclable ultra-deep foundation pit steel structure support device according to claim 7, characterized in that: A top plate (303) is fixedly connected to the support base (300); a support sleeve (304) is rotatably connected to the movable cylinder (301), and the support sleeve (304) is provided with an inclined surface (3040) that cooperates with the top plate (303); a support telescopic cylinder (305) is provided between the support sleeve (304) and the movable cylinder (301).

9. A recyclable ultra-deep foundation pit steel structure support device according to claim 8, characterized in that: A hook (310) is hinged to the second extension section (31); a limiting plate (306) that restricts the opening of the hook (310) is slidably connected to the second extension section (31); an extension plate (311) that cooperates with the limiting plate (306) is provided at one end of the hook (310).

10. A recyclable ultra-deep foundation pit steel structure support device according to claim 9, characterized in that: The limiting plate (306) is fixedly connected to the support sleeve (304) through the support plate (307).

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