Installation and construction method of tower crane in water

Abstract

The application relates to a water tower crane installation and construction method and relates to the technical field of bridge construction. The water tower crane comprises a tower crane device and a tower crane foundation platform. The bottom end of the tower crane device is fixedly connected to the tower crane foundation platform through a pre-embedded part. The tower crane foundation platform is placed in a foundation pit, and the fixing effect is stronger. Multiple vertical steel pipe piles are uniformly arranged around the outer side of the tower crane device. The steel pipe piles penetrate the tower crane foundation platform and are extended downward to extend into a riverbed. The steel pipe piles are connected through channel steel connecting pieces and are welded in a "z" shape to form a stable whole, so that the flood resistance and collision resistance are improved. The tower crane device comprises a tower crane body and a steel casing. The steel casing is arranged on the outer side of the tower crane body. Reinforced concrete is poured in and outside the steel casing foundation section. The steel casing is welded and raised along with the installation of the tower crane body, so that the tower crane body is protected from the impact and collision of flood flow. The riverbed outside the foundation pit is filled with stone to avoid the tower crane foundation platform being suspended due to the riverbed being scoured by flood flow, so as to affect the stability of the tower crane device.

Description

Technical Field

[0001] This invention relates to the technical field of bridge construction, and in particular to a method for installing and constructing a tower crane in water. Background Technology

[0002] For bridge superstructure construction, installing tower cranes in rain-prone rivers requires consideration of the impact of rainy season floods on the cranes. Current technology involves adjusting the height of the steel pipe piles to raise the entire tower crane above the flood level. At this point, the height of the crane foundation platform above the riverbed is often more than 10 meters. This excessive height increases the difficulty and cost of installing and dismantling the crane. During the rainy season, the stability and safety of the crane are threatened, and there is even a risk of overturning. Furthermore, during the rainy season, large floating objects such as tree trunks and small boats brought from upstream can impact the steel pipe pile foundations, causing deformation and testing the crane's flood resistance. Summary of the Invention

[0003] To address the technical problem mentioned above—that tower cranes in rain-fed rivers have high foundations, poor flood resistance, and thus affect their stability—this invention provides a method for installing and constructing a tower crane in water.

[0004] The present invention provides a method for installing and constructing a tower crane in underwater, which adopts the following technical solution:

[0005] A type of underwater tower crane includes a tower crane device and a tower crane foundation platform. The bottom end of the tower crane device is fixedly connected to the tower crane foundation platform via embedded parts. The tower crane foundation platform is placed in a foundation pit. Multiple vertical steel pipe piles are evenly arranged around the outside of the tower crane device, and channel steel connectors are welded between adjacent steel pipe piles. The steel pipe piles penetrate the tower crane foundation platform and extend downwards into the riverbed. The riverbed around the outer edge of the foundation pit is filled with rubble.

[0006] Preferably, the tower crane equipment includes a tower crane body and a steel casing; the tower crane body is installed vertically using standard tower crane sections, and a tower crane operator's cab and a jib are installed at the top of the tower crane body; the steel casing surrounds the outside of the tower crane body; the steel casing is divided into a steel casing foundation section and a remaining steel casing section welded above the steel casing foundation section, and reinforcing concrete is poured inside and outside the steel casing foundation section to enhance the structural connection stability.

[0007] Preferably, a foundation pad is provided between the foundation pit and the bottom of the tower crane foundation platform. The foundation pad facilitates construction and isolates the foundation platform from the soil to prevent contamination. Foundation reinforcement bars are tied above the foundation pad and embedded in the tower crane foundation platform. The embedded parts include steel casing reinforcement bars and foundation section embedded parts. The bottom ends of the steel casing reinforcement bars and the foundation section embedded parts are fixedly connected to the foundation reinforcement bars.

[0008] Preferably, three or more steel pipe piles are provided, and a "Z"-shaped welded channel steel connector is used between two adjacent steel pipe piles. The "Z"-shaped welding is stable and also reduces cost consumption. The steel pipe piles are fixedly connected to the tower crane equipment through the channel steel connector.

[0009] Preferably, a stiffening plate is welded to the outer ring of the middle part of the steel pipe pile, and the stiffening plate is fixed inside the tower crane foundation platform to improve the support and anti-collision capabilities of the steel pipe pile and extend its service life.

[0010] A method for installing and constructing an underwater tower crane, comprising the following steps:

[0011] S1: Excavate a foundation pit in the riverbed and level the bottom of the pit;

[0012] S2: Drive steel pipe piles into the riverbed according to the design position in the foundation pit, and weld stiffening plates onto the steel pipe piles;

[0013] S3: Pour the foundation cushion layer at the bottom of the foundation pit, tie the foundation reinforcement above the foundation cushion layer, make appropriate adjustments to the foundation reinforcement that conflicts with the position of the steel pipe pile, and pre-embed steel casing reinforcement and foundation section pre-embedded parts.

[0014] S4: Pour concrete in the foundation pit to form the tower crane foundation platform;

[0015] S5; Measure the compressive strength of the tower crane foundation platform to be greater than 80%, and use a truck crane to lift and install the standard tower crane sections.

[0016] S6: Hoist the steel casing foundation section and pour reinforcing concrete inside and outside the steel casing foundation section;

[0017] S7: Hoist the standard section of the tower crane up to 0.5 meters above the flood level; hoist the remaining section of the steel casing after welding it as a whole, and weld the foundation section of the steel casing to the remaining section of the steel casing;

[0018] S8: Weld channel steel connectors between two adjacent steel pipe piles and between the steel pipe piles and the tower crane equipment;

[0019] S9: Continue hoisting the standard tower crane sections and installing the tower crane cab and boom;

[0020] S10: When backfilling the foundation pit, use large-diameter rubble to backfill to the top of the riverbed, and at the same time, replace the riverbed within a 2.5m radius of the foundation pit with rubble.

[0021] In summary, the present invention has the following beneficial technical effects:

[0022] 1. Excavate a foundation pit in the riverbed and pour concrete to form a tower crane foundation platform. The top surface of the tower crane foundation platform is level with the riverbed, which expands the foundation form and makes the tower crane body more secure. Large-diameter rubble is used for backfilling within a 2.5m radius of the foundation pit to prevent the tower crane foundation platform from being suspended due to flood erosion of the riverbed, which would affect the stability of the tower crane equipment.

[0023] 2. The bottom of the tower crane equipment is fixedly connected to the tower crane foundation platform through embedded parts. A steel casing is installed around the outside of the tower crane body. The foundation section of the steel casing is reinforced with reinforced concrete. The steel casing is welded and raised as the tower crane body is installed until it is 0.5 meters above the flood level, protecting the tower crane body from the impact and collision of floods, and has a good flood prevention effect.

[0024] 3. Multiple vertical steel pipe piles are evenly arranged around the outside of the tower crane equipment. The steel pipe piles are extended into the riverbed and are welded together in a "Z" shape using channel steel connectors to form a stable whole, which improves the flood resistance and collision protection capability. The steel pipe piles are connected to the steel casing through channel steel connectors to reduce the deformation of the steel casing. Attached Figure Description

[0025] Figure 1 This is an installation perspective view of the tower crane equipment and tower crane foundation platform according to an embodiment of the present invention;

[0026] Figure 2 This is a top view of an underwater tower crane according to an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the installation of an underwater tower crane according to an embodiment of the present invention.

[0028] Explanation of reference numerals in the attached drawings: 1. Tower crane equipment; 2. Tower crane foundation platform; 3. Embedded parts; 4. Foundation pit; 5. Steel pipe pile; 6. Riverbed; 7. Rock slab; 8. Tower crane body; 9. Steel casing; 10. Standard tower crane section; 11. Tower crane cab; 12. Lifting boom; 13. Steel casing foundation section; 14. Remaining section of steel casing; 15. Reinforcing concrete; 16. Foundation pad; 17. Foundation reinforcement; 18. Steel casing reinforcement reinforcement; 19. Embedded parts of foundation section; 20. Channel steel connector; 21. Stiffening plate. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-3 The present invention will be described in further detail below.

[0030] This invention discloses a method for installing and constructing a tower crane in water.

[0031] Reference Figure 1 , Figure 2 , Figure 3A type of underwater tower crane includes a tower crane device 1 and a tower crane foundation platform 2. The bottom end of the tower crane device 1 is fixedly connected to the tower crane foundation platform 2 through a pre-embedded part 3. The tower crane foundation platform 2 is placed in a foundation pit 4. Multiple vertical steel pipe piles 5 are evenly arranged around the outside of the tower crane device 1. Channel steel connectors 20 are welded between two adjacent steel pipe piles 5. The steel pipe piles 5 penetrate the tower crane foundation platform 2 and extend downward into the riverbed 6. The riverbed 6 around the foundation pit is replaced and filled with rubble 7. Rubble 7 refers to irregularly shaped stones with a side length generally not less than 15 cm, which are selected through mining.

[0032] Reference Figure 1 , Figure 2 The tower crane equipment 1 includes a tower crane body 8 and a steel casing 9. The tower crane body 8 is installed vertically using standard tower crane sections 10. The tower crane cab 11 and the boom 12 are installed at the top of the tower crane body 8. The steel casing 9 surrounds the outside of the tower crane body 8. The steel casing 9 is divided into a steel casing foundation section 13 and a remaining steel casing section 14 welded above the steel casing foundation section 13. Reinforcing concrete 15 is poured inside and outside the steel casing foundation section 13.

[0033] Reference Figure 2 , Figure 3 A foundation pad 16 is provided in the gap between the foundation pit and the bottom of the tower crane foundation platform 2. Foundation steel bars 17 are tied on the foundation pad 16. The foundation steel bars 17 are first lapped during binding and then fixed at the joint. The foundation steel bars 17 are embedded in the tower crane foundation platform 2. The embedded parts 3 include steel casing reinforcing steel bars 18 and foundation section embedded parts 19. The bottom ends of the steel casing reinforcing steel bars 18 and the foundation section embedded parts 19 are fixedly connected to the foundation steel bars 17.

[0034] Reference Figure 1 , Figure 2 There are three or more steel pipe piles 5. The steel pipe piles 5 are connected by a “Z”-shaped welded channel steel connector 20. The steel pipe piles 5 and the tower crane equipment 1 are fixedly connected by the channel steel connector 20.

[0035] Reference Figure 1 , Figure 3 A stiffening plate 21 is welded to the outer ring of the middle part of the steel pipe pile 5. The stiffening plate 21 is fixed inside the tower crane foundation platform 2. The stiffening plate 21 is a plate-shaped stiffening member set to strengthen the rigidity of the component and ensure local stability. It is fixed inside the foundation platform 2 to enhance the firmness of the part of the steel pipe pile 5 that penetrates and is fixed to the foundation platform 2.

[0036] A method for installing and constructing a tower crane in water includes the following steps: S1: Excavating a foundation pit 4 on a riverbed 6 and leveling the bottom of the foundation pit 4; S2: Driving steel pipe piles 5 into the riverbed 6 according to the design position in the foundation pit 4, and welding stiffening plates 21 onto the steel pipe piles 5; S3: Pouring a foundation cushion layer 16 at the bottom of the foundation pit 4, tying foundation reinforcement bars 17 above the foundation cushion layer 16, adjusting the foundation reinforcement bars 17 that conflict with the position of the steel pipe piles 5 appropriately, and pre-embedding steel casing reinforcement bars 18 and foundation section embedded parts 19; S4: Pouring concrete in the foundation pit 4 to form a tower crane foundation platform 2; S5: Measuring the compressive strength of the tower crane foundation platform 2 to be greater than 80%, and using a truck crane to lift and install the standard tower crane section 10. S6: Hoist the steel casing foundation section 13, and pour reinforcing concrete 15 inside and outside the steel casing foundation section 13; S7: Hoist the tower crane standard section 10 up to 0.5 meters above the flood level; after the remaining steel casing section 14 is welded as a whole, hoist it, and weld the steel casing foundation section 13 to the remaining steel casing section 14; S8: Weld channel steel connectors 20 between two adjacent steel pipe piles 5 and between steel pipe piles 5 and tower crane equipment 1; S9: Continue to hoist the tower crane standard section 10 and install the tower crane cab 11 and lifting boom 12; S10: When backfilling the foundation pit 4, use large-diameter rubble 7 to backfill to the top surface of the riverbed 6, and at the same time replace the riverbed 6 within a 2.5m radius of the foundation pit 4 with rubble 7.

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

Claims

1. A type of underwater tower crane, characterized in that: The system includes a tower crane (1) and a tower crane foundation platform (2). The bottom of the tower crane (1) is fixedly connected to the tower crane foundation platform (2) by a pre-embedded part (3). The tower crane foundation platform (2) is placed in the foundation pit (4). The top surface of the tower crane foundation platform (2) is flush with the riverbed (6). The tower crane (1) is surrounded by multiple vertical steel pipe piles (5). A channel steel connector (20) is welded between two adjacent steel pipe piles (5). The steel pipe piles (5) penetrate the tower crane foundation platform (2) and extend downward into the riverbed (6). The riverbed (6) around the foundation pit is filled with rubble (7) to prevent the flood from eroding the riverbed (6) and causing the tower crane foundation platform (2) to be suspended. A stiffening plate (21) is welded to the outer ring of the middle of the steel pipe piles (5). The stiffening plate (21) is fixed inside the tower crane foundation platform (2).

2. The underwater tower crane according to claim 1, characterized in that: The tower crane equipment (1) includes a tower crane body (8) and a steel casing (9); the steel casing (9) surrounds the outside of the tower crane body (8); the tower crane body (8) is installed vertically in the form of tower crane standard sections (10), and the top of the tower crane body (8) is equipped with a tower crane cab (11) and a lifting boom (12); the steel casing (9) is divided into a steel casing foundation section (13) and a remaining steel casing section (14) welded above the steel casing foundation section (13), and the inner and outer sides of the steel casing foundation section (13) are filled with reinforcing concrete (15).

3. A submersible tower crane according to claim 2, characterized in that: A foundation pad (16) is provided between the bottom of the foundation pit and the tower crane foundation platform (2). A foundation steel bar (17) is tied above the foundation pad (16) and the foundation steel bar (17) is embedded in the tower crane foundation platform (2). The embedded part (3) includes a steel casing reinforcement steel bar (18) and a foundation section embedded part (19). The bottom end of the steel casing reinforcement steel bar (18) and the bottom end of the foundation section embedded part (19) are fixedly connected to the foundation steel bar (17).

4. A submersible tower crane according to claim 1, characterized in that: The steel pipe piles (5) are provided in three or more, and the steel pipe piles (5) are connected by a "z"-shaped welded channel steel connector (20). The steel pipe piles (5) and the tower crane equipment (1) are fixedly connected by the channel steel connector (20).

5. A method for installing and constructing an underwater tower crane, using the underwater tower crane described in claim 3, characterized in that, Includes the following steps: S1: Excavate the foundation pit (4) on the riverbed (6) and level the bottom of the foundation pit (4); S2: Drive steel pipe piles (5) into the riverbed (6) in the foundation pit (4) according to the design position, and weld stiffening plates (21) on the steel pipe piles (5). S3: Pour the foundation cushion layer (16) at the bottom of the foundation pit (4), tie the foundation reinforcement (17) above the foundation cushion layer (16), make appropriate adjustments to the foundation reinforcement (17) that conflict with the position of the steel pipe pile (5), and pre-embed the steel casing reinforcement (18) and the foundation section pre-embedded parts (19). S4: Concrete is poured into the foundation pit (4) to form the tower crane foundation platform (2); S5; Measure the compressive strength of the tower crane foundation platform (2) to be greater than 80%, and use a truck crane to hoist and install the standard tower crane section (10); S6: Hoist the steel casing foundation section (13) and pour reinforcing concrete (15) inside and outside the steel casing foundation section (13). S7: Hoist the standard section (10) of the tower crane until it is 0.5 meters above the flood level; hoist the remaining section (14) of the steel casing after welding it as a whole, and weld the foundation section (13) of the steel casing to the remaining section (14) of the steel casing. S8: Weld channel steel connectors (20) between two adjacent steel pipe piles (5) and between the steel pipe piles (5) and the tower crane equipment (1); S9: Continue hoisting the standard tower crane section (10) and install the tower crane cab (11) and boom (12); S10: When backfilling the foundation pit (4), use large-diameter rubble (7) to backfill to the top surface of the riverbed (6), and at the same time, replace the riverbed (6) within 2.5m of the outer ring of the foundation pit (4) with rubble (7).

Images