关键词: 海洋工程结构与施工, 海上光伏, 海冰载荷, 波浪荷载, 桩基承载力

Abstract: In order to solve the design problems of offshore photovoltaic power plants under complex working conditions, taking the 300 000 kW offshore photovoltaic project in Changli, Qinhuangdao as a case study, this paper focuses on the key technology of integrated design and installation of a fixed pile foundation type. By analyzing key parameters such as sea ice force, wave load, and sea current force in the Bohai Sea, multiple loads are combined, and the fixed pile foundation type scheme is modeled. The bearing characteristics of the pile foundation are analyzed, and the economic and reliability of the steel pipe pile and steel grid combination scheme considering sea ice effect are verified. The research results indicate that: 1) The results of limiting ice force by sea ice strength under different pile diameters show a linear positive correlation between pile diameter and ice force, and sea ice load is the controlling factor for the pile foundation design of this project. 2) Based on load combinations and modeling results, using steel pipe piles as the foundation of the photovoltaic platform, the bearing capacity of each section of the pile body meets the requirements. This study has verified the effectiveness of the method through engineering practice, providing a technical paradigm for large-scale development of offshore photovoltaics and a scientific basis for the design of photovoltaic power stations in high latitude sea areas.

Key words: ocean engineering structure and construction, offshore photovoltaics, sea ice load, wave load, bearing capacity of pile foundation