An undersea cable temporary fixing device and operation method

Abstract

The present invention relates to the technical field of subsea road engineering, and particularly refers to a temporary fixing device and operation method for subsea cables, including steel pipe piles, steel pipe trusses and cables. The cables are suspended on the steel pipe trusses through hanging components, the steel pipe trusses are fastened to the steel pipe piles through fastening components, and the steel pipe piles are fixed in the subsea soil layer. With such a structural arrangement, the cables are suspended on the steel pipe trusses through hanging components, and the steel pipe trusses are fastened to the steel pipe piles through fastening components. The buoyancy of the steel pipe trusses is used to offset the gravity of the cables, achieving the effect of fixing the cables to the seabed (preventing the cables from sinking). Its structure is simple and the operation is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of submarine road engineering, and particularly to a temporary fixing device for submarine cables and an operation method thereof. Background Art

[0002] Most of the submarine road engineering adopts shield construction technology. When there are construction deviations in the shield technology, harmful factors such as ground settlement will occur. For submarine cables that cross the submarine shield tunnel, if settlement deformation occurs, serious consequences may occur. Before the construction of the underground passage, it is necessary to take measures to fix the cables, but there is currently no good cable fixing measure. Since the shield construction has a large influence range on the ground, the fixed support points should be far away from the shield pipelines. If a structure is used for fixing, the structure needs to have a large stiffness, so the weight will be very large and it is not easy to operate. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a temporary fixing device for submarine cables and an operation method thereof, effectively solving the problems in the prior art.

[0004] In order to achieve the above object, the technical solution applied by the present invention is as follows:

[0005] A temporary fixing device for submarine cables includes steel pipe piles, a steel pipe truss and cables. The cables are hung on the steel pipe truss through hanging components, the steel pipe truss is fixed on the steel pipe piles through fastening components, and the steel pipe piles are fixed in the submarine soil layer.

[0006] According to the above scheme, the fastening component includes an upper hoop and a lower hoop. The upper part of the steel pipe truss is fixed on the steel pipe pile through the upper hoop, and the lower part of the steel pipe truss is fixed on the steel pipe pile through the lower hoop.

[0007] According to the above scheme, the hanging component includes a cable clamp and a suspension rope. The cable clamp is used to clamp the cable. One end of the suspension rope is fixed on the cable clamp, and the other end of the suspension rope is hung on the steel pipe truss.

[0008] According to the above scheme, the steel pipe truss includes an upper steel pipe one, an upper steel pipe two, a lower steel pipe one and a lower steel pipe two arranged in a closed structure. The upper steel pipe one and the upper steel pipe two are fixedly connected through a transverse connecting rod and are internally connected. The lower steel pipe one and the lower steel pipe two are fixedly connected through a transverse connecting rod and are internally connected. The upper steel pipe one and the lower steel pipe one are fixedly connected through a vertical connecting rod and are internally connected. The upper steel pipe two and the lower steel pipe two are fixedly connected through a vertical connecting rod. Adjacent two vertical connecting rods are fixedly connected through an inclined connecting rod and are internally connected.

[0009] According to the above scheme, air holes are provided on the upper steel pipe one and the upper steel pipe two. The air holes are externally connected to an air compressor and a flow meter through air pipes. Water holes are provided at the bottoms of the lower steel pipe one and the lower steel pipe two.

[0010] According to the above solution, the steel pipe truss is divided into three sections by length, including a first truss, a second truss and a third truss, each being an independent entity, and adjacent two groups of trusses are fixedly connected by bolts.

[0011] An operation method of a submarine cable temporary fixing device includes the following steps:

[0012] Step 1), prefabricate steel pipe piles, steel pipe trusses, upper hoops, lower hoops and cable clips in a factory;

[0013] Step 2), use a pile driving device to drive the steel pipe piles to a predetermined depth at a predetermined position;

[0014] Step 3), lift the processed steel pipe truss to the water surface at the installation position, and splice the first truss, the second truss and the third truss into a whole with bolts on the water surface under the condition of blocking the air pipe;

[0015] Step 4), under the cooperation of a floating crane, release the restraint of the air pipe, pour seawater into the steel pipe through the water holes on the first lower steel pipe and the second lower steel pipe, calculate the exhaust volume, ensure that the dead weight of the steel pipe truss is slightly greater than the buoyancy force received by the steel pipe truss, and place it between the four steel pipe piles under the cooperation of the floating crane;

[0016] Step 5), a diver clamps the cable with a cable clip, connects the cable clip to the transverse connecting rod of the steel pipe truss with a lifting rope, and makes each lifting rope in a taut state.

[0017] Step 6), use an air compressor to evenly inject air into the first truss, the second truss and the third truss through the air pipe, so as to squeeze out the water in the first truss, the second truss and the third truss, so that the whole steel pipe truss generates a larger buoyancy force, and the generated buoyancy force can be calculated by the amount of air added. When the buoyancy force is equal to the gravity of the cable, stop adding air and lock the air adding pipe.

[0018] Step 7), a diver dives down to tightly attach the upper hoop and the lower hoop to the steel pipe truss and lock them on the steel pipe pile, and then release the control of the floating crane on the steel pipe truss.

[0019] Advantages of the present invention:

[0020] 1) Through the cooperation of the steel pipe pile and the steel pipe truss, the cable is fixed to the seabed;

[0021] 2) The steel pipe of the steel pipe truss is tightly held on the steel pipe pile by the upper hoop and the lower hoop for fixation, and both installation and disassembly are very convenient;

[0022] 3) The cable is clamped by the cable clip and then positioned on the steel pipe truss through the lifting rope, so as to achieve the purpose of suspending and positioning the cable on the steel pipe truss, and the operation is convenient;

[0023] 4) The purpose of adding gas and draining water inside the steel pipe can be achieved through the air holes. The buoyancy of water is used to offset the weight of the steel pipe truss and the cable. By using the buoyancy to offset the gravity of the steel pipe truss and the cable, the stress of the steel pipe truss becomes very small, and the span can be expanded to a very large value. The purpose of adding water and sinking and draining water and floating upward inside the steel pipe can be achieved through the water holes. By using the buoyancy to offset the gravity of the steel pipe truss and the cable, the stress of the steel pipe truss becomes very small, and the span can be expanded to a very large value. Description of the Drawings

[0024] Figure 1 is the front view of the overall structure of the present invention;

[0025] Figure 2 is the side view of the overall structure of the present invention;

[0026] Figure 3 is the schematic diagram of the steel pipe truss structure of the present invention;

[0027] Figure 4 is Figure 2 the enlarged view of position A in

[0028] Figure 5 is Figure 2 the enlarged view of position B in

[0029] Figure 6 is the schematic assembly diagram of the steel pipe truss of the present invention.

[0030] 1. Connecting flange; 2. Steel pipe pile; 3. Steel pipe truss; 31. First truss; 32. Second truss; 33. Third truss; 4. Transverse connecting rod; 5. Vertical connecting rod; 6. Oblique connecting rod; 7. Upper hoop; 8. Lower hoop; 9. Cable; 10. Cable clamp; 11. Suspension rope; 12. Air pipe; 13. Air hole; 14. Water hole; 15. Upper steel pipe one; 16. Upper steel pipe two; 17. Lower steel pipe one; 18. Lower steel pipe two. Detailed Embodiment

[0031] The technical solution of the present invention will be described below with reference to the drawings and embodiments.

[0032] As Figures 1 to 6 shown, a subsea cable temporary fixing device according to the present invention includes a steel pipe pile 2, a steel pipe truss 3 and a cable 9. The cable 9 is hung on the steel pipe truss 3 through a hanging assembly, the steel pipe truss 3 is fixed on the steel pipe pile 2 through a fastening assembly, and the steel pipe pile 2 is fixed in the seabed soil layer. With such a structural arrangement, the cable 9 is hung on the steel pipe truss 3 through the hanging assembly, and the steel pipe truss 3 is fixed on the steel pipe pile 2 through the fastening assembly. The buoyancy of the steel pipe truss 3 is used to offset the gravity of the cable 9, achieving the effect of fixing the cable 9 to the seabed (preventing the cable 9 from sinking). Its structure is simple and the operation is convenient.

[0033] In this embodiment, there are a total of four steel pipe piles 2, two of which are arranged at the front end of the steel pipe truss 3, and the other two are arranged at the rear end of the steel pipe truss 3. Moreover, the distance between the steel pipe piles 2 arranged at the front end and the rear end of the steel pipe truss 3 needs to meet the inter-hole requirements for placing the steel pipe truss 3.

[0034] In this embodiment, the fastening assembly includes an upper hoop 7 and a lower hoop 8. The upper part of the steel pipe truss 3 is fixed to the steel pipe pile 2 through the upper hoop 7, and the lower part of the steel pipe truss 3 is fixed to the steel pipe pile 2 through the lower hoop 8. With such a structural arrangement, the steel pipe of the steel pipe truss 3 is tightly held on the steel pipe pile 2 by the upper hoop 7 and the lower hoop 8 for fixation, and both installation and disassembly are very convenient.

[0035] In practical applications, the fixing method using hoops can facilitate the adjustment of the position of the steel pipe truss 3 on the steel pipe pile 2. During operation, it can be achieved simply by loosening the hoops, and the operation is relatively convenient.

[0036] In this embodiment, the hanging assembly includes a cable clip 10 and a suspension rope 11. The cable clip 10 is used to clamp the cable 9, one end of the suspension rope 11 is fixed to the cable clip 10, and the other end of the suspension rope 11 is hung on the steel pipe truss 3. With such a structural arrangement, the cable 9 is clamped by the cable clip 10 and then positioned on the steel pipe truss 3 through the suspension rope 11, achieving the purpose of suspending and positioning the cable 9 on the steel pipe truss 3.

[0037] In this embodiment, the steel pipe truss 3 includes an upper steel pipe one 15, an upper steel pipe two 16, a lower steel pipe one 17, and a lower steel pipe two 18 arranged in a closed structure. The upper steel pipe one 15 and the upper steel pipe two 16 are fixedly connected through a transverse connecting rod 4 and are internally connected. The lower steel pipe one 17 and the lower steel pipe two 18 are fixedly connected through a transverse connecting rod 4 and are internally connected. The upper steel pipe one 15 and the lower steel pipe one 17 are fixedly connected through a vertical connecting rod 5 and are internally connected. The upper steel pipe two 16 and the lower steel pipe two 18 are fixedly connected through a vertical connecting rod 5. Adjacent two vertical connecting rods 5 are fixedly connected through an inclined connecting rod and are internally connected. With such a structural arrangement, the inside of the steel pipe is connected and in a hollow state, which can achieve filling water into the steel pipe to make it sink and draining water to make it float.

[0038] In practical applications, the cable 9 is hung on the transverse connecting rod 4 between the lower steel pipe one 17 and the lower steel pipe two 18 through the hanging assembly.

[0039] In this embodiment, air holes 13 are provided on the upper steel pipe 1 and the upper steel pipe 2. The air holes 13 are externally connected to an air compressor and a flow meter through an air pipe 12. Water holes 14 are provided at the bottoms of the lower steel pipe 1 and the lower steel pipe 2. With such a structural arrangement, the purpose of adding gas and draining water inside the steel pipe can be achieved through the air holes 13, and the buoyancy of water is used to offset the weights of the steel pipe truss 3 and the cable 9. The purpose of adding water to sink the steel pipe and draining water to float it can be achieved through the water holes 14.

[0040] In practical applications, by using buoyancy to offset the gravity of the steel pipe truss 3 and the cable 9, the stress of the steel pipe truss 3 becomes very small, and the span can be expanded to a very large value.

[0041] It should be noted that by using buoyancy to offset the gravity of the steel pipe truss 3 and the cable 9, the stress of the steel pipe truss 3 becomes very small, and the span can be expanded to a very large value.

[0042] In this embodiment, the steel pipe truss 3 is divided into three segments by length, including a first truss 31, a second truss 32, and a third truss 33, each being an independent body. Adjacent groups of trusses are fixedly connected by bolts. With such a structural arrangement, its installation and disassembly are very convenient.

[0043] In practical applications, the length of the applicable steel pipe truss 3 can be adjusted according to the position of the steel pipe pile 2.

[0044] In practical applications, connecting flanges 1 are provided at the ends of the first truss 31, the second truss 32, and the third truss 33.

[0045] An operation method of a submarine cable temporary fixing device includes the following steps:

[0046] Step 1), prefabricate the steel pipe pile 2, the steel pipe truss 3, the upper clamp 7, the lower clamp 8, and the cable clamp 10 in the factory;

[0047] Step 2), use a pile driving device to drive the steel pipe pile 2 to a predetermined depth at a predetermined position;

[0048] Step 3), lift the fabricated steel pipe truss 3 to the water surface at the installation position, and on the water surface, splice the first truss 31, the second truss 32, and the third truss 33 into a whole with bolts under the condition of blocking the air pipe 12;

[0049] Step 4), under the cooperation of a floating crane, release the restraint of the air pipe 12, pour seawater into the steel pipe through the water holes 14 on the lower steel pipe 1 and the lower steel pipe 2, calculate the exhaust volume, ensure that the self-weight of the steel pipe truss 3 is slightly greater than the buoyant force received by the steel pipe truss 3, and place it between the four steel pipe piles 2 under the cooperation of the floating crane;

[0050] Step 5), the diver clamps the cable 9 with the cable clamp 10, connects the cable clamp 10 to the transverse connecting rod 4 of the steel pipe truss 3 with the lifting rope 11, and keeps each lifting rope 11 in a taut state.

[0051] Step 6), use an air compressor to evenly inject air into the first truss 31, the second truss 32 and the third truss 33 through the air pipe 12, so as to squeeze out the water in the first truss 31, the second truss 32 and the third truss 33, making the overall steel pipe truss 3 generate a large buoyancy force. The generated buoyancy force can be calculated by the amount of air added. When the buoyancy force is equal to the gravity of the cable, stop adding air and lock the air inlet pipe.

[0052] Step 7), the diver dives down and presses the upper hoop 7 and the lower hoop 8 tightly against the steel pipe truss 3 and locks them on the steel pipe pile 2, and then releases the control of the floating crane on the steel pipe truss 3.

[0053] The technical solutions in the embodiments of the present invention have been described above, but the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the purpose of the present invention and the scope protected by the claims. These all belong to the protection scope of the present invention.

Claims

1. A temporary fixing device for submarine cables, characterized in that: It includes steel pipe piles (2), steel pipe trusses (3) and cables (9). The cables (9) are suspended on the steel pipe trusses (3) through hanging components. The steel pipe trusses (3) are fastened to the steel pipe piles (2) through fastening components. The steel pipe piles (2) are fixed in the seabed soil layer. The steel pipe truss (3) includes upper steel pipe one (15), upper steel pipe two (16), lower steel pipe one (17) and lower steel pipe two (18) arranged in a closed structure. The upper steel pipe one (15) and the upper steel pipe two (16) are fixedly connected through a transverse connecting rod (4) and are internally connected. The lower steel pipe one (17) and the lower steel pipe two (18) are fixedly connected through a transverse connecting rod (4) and are internally connected. The upper steel pipe one (15) and the lower steel pipe one (17) are fixedly connected through a vertical connecting rod (5) and are internally connected. The upper steel pipe two (16) and the lower steel pipe two (18) are fixedly connected through a vertical connecting rod (5). Adjacent two vertical connecting rods (5) are fixedly connected through an inclined connecting rod and are internally connected. Air holes (13) are provided on the upper steel pipe one (15) and the upper steel pipe two (16). The air holes (13) are externally connected to an air compressor and a flow meter through air pipes (12). Water holes (14) are provided at the bottoms of the lower steel pipe one (17) and the lower steel pipe two (18).

2. The temporary fixing device for submarine cable according to claim 1, characterized in that: The fastening component includes an upper hoop (7) and a lower hoop (8). The upper part of the steel pipe truss (3) is fixed to the steel pipe pile (2) through the upper hoop (7). The lower part of the steel pipe truss (3) is fixed to the steel pipe pile (2) through the lower hoop (8).

3. The temporary fixing device for submarine cable according to claim 1, characterized in that: The hanging component includes a cable clip (10) and a suspension rope (11). The cable clip (10) is used to clamp the cable (9). One end of the suspension rope (11) is fixed to the cable clip (10), and the other end of the suspension rope (11) is suspended on the steel pipe truss (3).

4. The temporary fixing device for a submarine cable according to claim 2, characterized in that: The steel pipe truss (3) is divided into three sections by length, including a first truss (31), a second truss (32) and a third truss (33), each being an independent body. Adjacent two groups of trusses are fixedly connected through bolts.

5. The operation method of a temporary fixing device for a submarine cable according to any one of claims 1-4, characterized in that, It includes the following steps: Step 1), prefabricate steel pipe piles (2), steel pipe trusses (3), upper hoops (7), lower hoops (8) and cable clips (10) in the factory; Step 2), use pile driving equipment to drive the steel pipe piles (2) to a predetermined depth at a predetermined position; Step 3), lift the prefabricated steel pipe truss (3) to the water surface at the installation position, and splice the first truss (31), the second truss (32) and the third truss (33) into a whole with bolts on the water surface with the air pipes (12) blocked; Step 4), under the cooperation of a floating crane, release the restraint of the air pipes (12), pour sea water into the steel pipes through the water holes (14) on the lower steel pipe one (17) and the lower steel pipe two (18), calculate the exhaust volume, ensure that the self-weight of the steel pipe truss (3) is slightly greater than the buoyancy force received by the steel pipe truss (3), and place it between four steel pipe piles (2) under the cooperation of the floating crane; Step 5), the diver clamps the cable (9) with a cable clamp (10), connects the cable clamp (10) to the transverse connecting rod (4) of the steel pipe truss (3) with a lifting rope (11), and keeps each lifting rope (11) in a taut state; Step 6), use an air compressor to evenly inject air into the first truss (31), the second truss (32) and the third truss (33) through an air pipe (12), so as to squeeze out the water in the first truss (31), the second truss (32) and the third truss (33), causing a large buoyancy force to be generated on the overall steel pipe truss (3). The generated buoyancy force can be calculated by the amount of air added. When the buoyancy force is equivalent to the gravity of the cable, stop adding air and lock the air inlet pipe; Step 7), the diver dives down, presses the upper hoop (7) and the lower hoop (8) against the steel pipe truss (3) and locks them on the steel pipe pile (2), and then releases the control of the floating crane on the steel pipe truss (3).

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