Uplift cast-in-place pile for reinforcing seabed and construction method thereof

Abstract

The invention discloses an anti-pulling cast-in-place pile for reinforcing a seabed and a construction method of the anti-pulling cast-in-place pile, and belongs to the technical field of underwater infrastructure construction. Comprising a pile body, convex thorns and a first pipeline. The pile body is a cylindrical barrel with openings in the upper and lower ends, and a plurality of extending holes are formed in the side wall of the pile body; the convex thorns are of conical telescopic structures, cavities are formed in the convex thorns, a plurality of water outlet holes are formed in the side walls of the convex thorns, and the convex thorns are fixedly mounted on the extending holes in one-to-one correspondence and can extend out of the pile body or retract into the pile body; the first pipeline is correspondingly connected with the convex thorns, penetrates into the pile body and is used for being connected with the maximum-diameter end of the corresponding convex thorn and the pump machine. The convex thorns penetrate into the seabed around the pile and the side friction resistance of the pile body and the soil body of the seabed around the pile is enhanced by filling, draining and grouting the convex thorns, so that the pulling resistance and the stability of the pile foundation are improved, the anti-scouring capacity and the bearing capacity of the pile foundation are enhanced by grouting, and the construction method is flexible, simple and convenient, and is particularly suitable for the construction environment with the weak seabed foundation.

Description

technical field [0001] The invention relates to the technical field of underwater foundation construction, in particular to an uplift-resistant cast-in-place pile for strengthening seabeds and a construction method thereof. Background technique [0002] With the increase of resource consumption in our country year by year, the development of marine resources has become a key area of ​​development in our country. In particular, offshore wind energy resources, as a clean and harmless renewable energy, are increasingly valued by human beings. The exploitation of resources is inseparable from the construction of foundation engineering. Pile foundations are often used as the foundation of marine structures such as offshore wind power structures and offshore platforms. With the development of large-scale offshore structures, the bearing capacity and anti-scouring performance of pile foundations requirements are getting higher and higher. [0003] On the one hand, due to the speci...

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Problems solved by technology

[0003] On the one hand, due to the special seabed environment, the seabed soil is in a saturated state and the water content is extremely high, the bearing capacity of the foundation under external loads is low, and the foundation deformation is large. At present, the pile foundation of offshore wind power in my country is generally increased by increasing the depth of the pile or Increase the diameter of the pile to improve the uplift resistance and bearing capacity, but this construction method will greatly increase the engineering cost of the cast-in-place pile and increase the difficulty of construction

On the other hand, the seabed has been subjected to wave and current circulation for a long time, and the soil around the pile is easy to scour, which may threaten the stability of the pile body in severe cases. In the past, measures such as riprap protection, retaining ring protection, and sacrificial pile protection were used to enhance the seabed's anti-scouring performance, but often face problems such as short timeliness and poor practicability, resulting in waste of materials

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