Great-diameter variable section irregularly-shaped resistance-increased steel pipe pile system and construction method thereof

Abstract

The invention discloses a great-diameter variable section irregularly-shaped resistance-increased steel pipe pile system, which comprises an offshore work platform. Lifting equipment and a high-pressure pump are arranged on the offshore work platform. The high-pressure pump is connected with a plurality of high-pressure injection pipes on the inner wall of a steel pipe pile. A pile cap is arranged at the top end of the steel pipe pile. A vibratory hammer connected with the lifting equipment is arranged on the upper part of the pile cap. A slurry pump bracket is arranged in the steel pipe pile. A slurry discharge pipe is supported on the slurry pump bracket. The lower part of the slurry discharge pipe is connected with a slurry pump, and the upper part of the slurry discharge pipe is communicated with a slurry discharge opening in the lateral surface of the steel pipe pile. The invention also discloses a construction method for the great-diameter variable section irregularly-shaped resistance-increased steel pipe pile system. The great-diameter variable section irregularly-shaped resistance-increased steel pipe pile system and the construction method thereof are adapted to various kinds of foundation engineering with special technical requirements on the pressure resistance, pulling resistance, bending resistance and the like of pile foundations, particularly to a large-sized single body structure of offshore engineering such as a bridge pier and an offshore wind turbine, and have the characteristics of convenience for construction, low construction cost, easy control over construction quality, and the like.

Description

technical field [0001] The invention relates to a steel pipe pile, in particular to a special-shaped resistance-increasing steel pipe pile system with a large diameter and variable cross-section and a construction method thereof. Background technique [0002] As a main pile type used in today's foundation engineering, steel pipe piles are widely used in high-rise buildings, bridges, seaport terminals and other projects. Especially in recent years, with the rapid development of offshore engineering, the use of steel pipe piles in large-scale projects such as sea-crossing bridges and oil platforms has achieved good results, expanding the application prospects of steel pipe piles and promoting the rapid improvement of steel pipe pile technology. [0003] Now the common steel pipe piles are mostly welded steel pipes with equal diameter, and the diameter range is about 400-1200mm. For large single structures such as bridge piers and offshore wind turbines, it is necessary to use...

AI Technical Summary

Problems solved by technology

For large single structures such as bridge piers and offshore wind turbines, it is necessary to use multiple steel pipe piles to meet the requirements of the superstructure. At the same time, the bearing performance of each steel pipe pile in the foundation must meet the design requirements before the superstructure can be constructed. more difficult

In addition, hammering piles are used in pile sinking, which is more difficult for hard ground piles, and it is easy to cause differences in the bearing capacity of various steel pipe piles, causing safety hazards to the foundation

The vertical and horizontal bearing capacity provided by steel pipe piles of equal diameter is relatively small, so the cost is high

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