Pile Installation Assessment of Offshore Wind Jacket Foundation in Completely Weathered Rock: A Case Study of the South China Sea

The assessment of pile drivability is the premise successful installation, and completely weathered (CW) rock may bring risk refusal. This paper presents a case driving refusal that occurred in CW gneiss layer. physical mechanical properties are analyzed based on results laboratory test, cone penetration test (CPT), standard (SPT). By comparing with those from intact gneiss, layer this study was found to be soil-like. Additionally, it sand-like according CPT-based soil classification systems. resistance (SRD) calculated different methods for sand compared SRD inferred pile-driving records. show modified Fugro’s method assuming fully plugged condition provide good study. It necessary determine reasonably before conducting analysis, framework proposed analyzing