STRENGTH BEHAVIOUR OF SOFT CLAY IN JIAXING OFFSHORE AREA BASED ON BALL PENETRATION TEST

Wang Kuanjun; Wang Mingyuan; Shen Kanmin; Wang Dong; Wang Xinquan

doi:10.19912/j.0254-0096.tynxb.2022-1865

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (4) : 134-142. DOI: 10.19912/j.0254-0096.tynxb.2022-1865

STRENGTH BEHAVIOUR OF SOFT CLAY IN JIAXING OFFSHORE AREA BASED ON BALL PENETRATION TEST

Wang Kuanjun¹, Wang Mingyuan², Shen Kanmin¹, Wang Dong³, Wang Xinquan⁴

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Abstract

In addressing the challenge of assessing the strength of soft clay in the foundation design of offshore wind turbines, this paper focuses on the strength calibration of soft clay in Zhejiang Jiaxing's offshore region by ball penetration tests and laboratory test results. The ball penetration factor N_ball for moddy silty clay was obtained. The ball penetration factor N_ballDSdetermined through consolidated quick shear tests, is ranged from 6.70 to 14.91, with a mean of 10.58 and a standard value of 10.91. Likewise, the factorN_ballUU determined by using triaxial unconsolidated undrained shear test results, is ranged from 7.75 to 23.75, with a mean of 17.44, and a standard value of 19.03. The calibrated ball factor N_ball provides a more accurate representation of the soft clay strength in Zhejiang Jiaxing's offshore area. We recommend adopting N_ballUU with a standard value of 19.03, calibrated from the triaxial UU test, as the parameter for interpreting the lower limit of strength. Additionally, N_ballDS with a standard value of 10.91, calibrated from the consolidated quick shear test, serves as the parameter for interpreting the best estimate （median value） of strength.

Key words

offshore wind farms / clay / shear strength / ball penetration test / ball penetration factor

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Wang Kuanjun, Wang Mingyuan, Shen Kanmin, Wang Dong, Wang Xinquan. STRENGTH BEHAVIOUR OF SOFT CLAY IN JIAXING OFFSHORE AREA BASED ON BALL PENETRATION TEST[J]. Acta Energiae Solaris Sinica. 2024, 45(4): 134-142 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1865

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