浅谈海上风电浅覆盖层地质孤石解决方案

Treatment of Isolated Boulders in Shallow Overburden Foundation of Offshore Wind Power Projects

福建和广东的近海风电场常存在浅覆盖层地质,在其风化岩层中普遍存在的孤石给桩基础的设计和施工带来极大的困难。根据工程实践,一是适当增加前期地勘费用,提高地质参数和地质分布的准确性,降低孤石带来的风险;二是根据地勘资料比选最优基础结构型式;三是加强设计与施工单位的密切联系和配合,后期采取合理的解决方案,有效保证桩基结构安全。

Shallow overburden geological condition is widely existed in offshore wind farms in Fujian and Guangdong Provinces.While the design and construction of pile foundation in such geological condition are of great difficulties because of the commonly existed isolated boulders in the weathered rock layers.Based on practical experience,several treatment measures are proposed.Firstly,we should properly increase the geological exploration cost to get more accurate geological parameters and distributions and reduce the risks caused by isolated boulders.Secondly,the optimal foundation structure should be selected based on the actual geological exploration data.Lastly,we should keep a close contact and cooperation between the design and construction units so that reasonable treatment measures could be taken timely to ensure the safety of the pile foundation structures.