Large-diameter single-pile steel pipe pile internal inserting transition section grouting construction system and method

Abstract

The invention discloses a large-diameter single-pile steel pipe pile internal inserting transition section grouting construction system and method. The system comprises a steel pipe pile and an internal inserting transition section. A ring plate arranged on the internal inserting transition section is fixedly connected with the steel pipe pile. The bottom of the internal inserting transition section is connected with the steel pipe pile through an installing part. Grouting slurry is grouted into a grouting area between the internal inserting transition section and the steel pipe pile. The method comprises the following steps that pile striking operation of the steel pipe pile is carried out, the portion, exceeding the designed elevation, of the upper end of the steel pipe pile is cut, andthe pile top is polished flatly; the internal inserting transition section is internally inserted into the steel pipe pile and fixed; and the grouting slurry is grouted into the grouting area. According to the system and the method, construction precision is high, the safety coefficient is high, the requirement for equipment is low, marine operation time and construction cost are saved, and grouting and connecting construction quality of the internal inserting transition section can be ensured.

Description

technical field [0001] The application belongs to the technical field of offshore wind power foundation construction, and in particular relates to a grouting construction system and method for a large-diameter single steel pipe pile inserted into a transition section. Background technique [0002] In offshore wind power projects at home and abroad, steel pipe pile foundations widely used are currently one of the most mature foundation types for offshore wind power applications in the world, and are applicable to a wide range of water depths. For the connection between the wind turbine tower and the steel pipe pile foundation, a large number of foreign countries use the transition section grouting connection, such as Utgrunden I (Switzerland), Horns Rev (Denmark) and North Hoyle (UK). The basic offshore wind power project - the CGN Rudong offshore wind power project started, and a large number of flange connections were used. [0003] In domestic offshore wind farms where la...

AI Technical Summary

Problems solved by technology

Since the grouting of the transition section of the steel pipe pile is the only path for the wind load to be transmitted from the tower to the steel pipe pile foundation, the grouting connection of the transition section bears axial force, bending moment, and fatigue load. Once the grouting connection section fails or has defects, it will directly affect Fan operation and service life

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