A test method for compacted sand piles in offshore wind power

Abstract

The invention discloses a test method for a sand compaction pile of offshore wind power. The method includes the following steps: driving and arranging a test pile, installing a compression resistancetest device, erecting a test platform, testing bearing capacity of a composite foundation of the sand compaction pile, testing pile body quality of the sand compaction pile, detecting a protuberanceheight of a mud surface, and performing indoor experiment on a sand sample of the sand compaction pile. When the step of driving and arranging the test pile is carried out, 100 sand piles are driven into an underwater sand layer in square arrangement; and when the step of installing the compression resistance test device is performed, installation of a counter force frame, installation of a loading system, installation of a reference system and installation of a settlement measurement system are included. When the step of erecting the test platform is carried out, four anchor piles are utilized as a supporting base of the test platform. When the step of testing the bearing capacity of the composite foundation of the sand compaction pile, settlement measurement and earth pressure measurement are included. When the step of testing the pile body quality of the sand compaction pile, a standard penetration test is employed. The test method of the invention can determine the bearing capacityof the composite foundation, and a disturbance condition of driving and arranging an underwater sand compaction pile to a soil body is mastered.

Description

technical field [0001] The invention relates to a test method for offshore wind power compacted sand piles. Background technique [0002] Offshore wind power has the characteristics of abundant resources, high utilization hours of power generation, cleanness and environmental protection, and is suitable for large-scale development. In recent years, European and American countries have shifted the focus of wind power development to the sea. development path. [0003] With the improvement of the level of offshore wind power construction, the capacity of wind turbines is also increasing, and the requirements for structural safety characteristics are getting higher and higher, especially for the bearing capacity of pile foundations. The method of exploring the bearing capacity of pile foundation through experimental research is an effective means at present. The higher the displacement rate of the compacted sand pile, the better the drainage channel formed by it, and the less ...

AI Technical Summary

Problems solved by technology

As my country's underwater compacted sand piles are still in their infancy, the performance of sand piles has not been fully clarified, and the effect of compacted sand piles on soft soil foundation is only measured through standard penetration tests.

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