Abstract:
Introduction In the geotechnical investigation of offshore projects, the drilling disturbance of the soil sample may be very large, which may lead to the unreliability of laboratory tests. As one of the most important method of in-situ tests offshore, piezocone penetration (CPTU) test has been more and more used in China and abroad.
Method Therefore, the strata classification and soil parameters analysis methods based on CPTU are summarized and analyzed.On this basis, the analysis methods are applied to offshore wind farm in China, and the applicability of current soil parameters interpretation methods are further evaluated.
Result The results show that the experience parameters which adopted in abroad may overestimate the soil parameters. It is recommended to calibrate the experience parameters of interpretation formulae in combination with the characteristic of offshore strata in China.
Conclusion Based on the experiment test and in-situ test data of regional soil in seabed of Jiangsu, Zhejiang and Fujian, we demonstrate that it is workable to improve and calibrate the parameter of empirical formula. This work can provide some guidances for further study on offshore wind farm design.
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