Drill absorption pile structure and construction method thereof

Abstract

The invention relates to an offshore drilled absorbing pile and the construction method thereof. When a drilling bit (11) breaks the ground and is drilled, an immersed tube is drilled into a high pressure water pump (18) on the main machine of a drilling machine, and supplies high pressure water for the lower part of the drilling bit through the central tube of a drilling rod to form high pressure slurry, and the slurry is discharged out of the drilled absorbing pile through a one-way valve (7) installed on a baffle plate and a slurry discharging tube (9) connected with the one-way valve. The drilling bit is drilled and breaks the ground from the upper part of the sealed bin of the drilled absorbing pile to the bottom of the drilled absorbing pile to clean all the soil plugs in the sealed bin out of the drilled absorbing pile, the drilling bit is stopped, and simultaneously the high pressure water pump (18) stops supplying water. A submersible sewage pump on the drilling machine is started up, the one-way valve (7) on the cone shaped baffle plate is closed to ensure that a sealed space is formed at the lower part, the sea water is discharged from the sealed space through the submersible sewage pump (19) to form negative pressure, the drilled absorbing pile is immersed into the sea bed under the sea water pressure, the drilling bit is supported on the mud surface and keeps still when the drilled absorbing pile is immersed, the cone shaped baffle plate of the drilled absorbing pile is lowered to the drilling bit position along the drilling rod (10) to stop the water discharging of the submersible sewage pump, and thus the primary drilling of the drilled absorbing pile is completed. The former operations are repeated to ensure the drilled absorbing pile to enter into the sea bed in a step-by-step immersed tube drilling way, in order to complete the driving-in construction of the drilled absorbing pile.

Description

technical field [0001] The invention belongs to the innovation of offshore drilling and suction pile structure and construction method thereof. Background technique [0002] At present, the foundation of offshore steel pipe piles is straight and inclined steel pipe piles, and the steel pipe piles use the large piling hammer on the piling ship to drive the large-diameter steel pipe piles into the mud below the mud surface of the seabed, and the upper part of the steel pipe piles is exposed to the water surface. The entire piling construction requires a large floating crane piling ship and a large piling hammer, which has a long construction period and high costs. Contents of the invention [0003] In order to overcome the long construction period and high cost of large-scale piling hammers for traditional offshore steel pipe pile driving, especially for underwater piles, a special underwater piling hammer is required. The present invention provides a structural design of of...

AI Technical Summary

Problems solved by technology

The entire piling construction requires a large floating crane piling ship and a large piling hammer, which has a long construction period and high cost

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