Abstract:The ore terminal project in West Africa is situated at the estuary of an inland river.The geological conditions at the terminal location consist of shallow-buried,high-strength slightly weathered granite with a uniaxial compressive strength of approximately 83 MPa.This rock layer is overlain by 12-20 m of soft silt,clay,and sand stratas.In the front end engineering design(FEED),to ensure pile foundation bearing capacity and mitigate geological risks,the owner specified a socket depth of 4.5 m into the rock for the access trestle piles and 8 m for the wharf piles,resulting in a total rock-socketed length of 3,852 m for the wharf and 1,134 m for the access trestle.However,constructing sockets in high-strength granite proves extremely challenging,with low efficiency,posing significant risks to the project schedule.During the engineering,procurement,construction(EPC)phase,we optimize the design through detailed geotechnical investigations,refined analyses of hydrological and construction conditions,comparative studies of domestic and international codes for calculating the bearing capacity of driven piles at the rock surface,precise structural calculations for the terminal and access trestle,integration of design and testing protocols,and validation with on-site test results.These efforts lead to the elimination of rock sockets for the access trestle piles,a reduction in the wharf pile socket depth,and optimization of the wharf bent spacing and pile-to-beam connections.Consequently,the rock-socketed quantity and construction complexity are significantly reduced,and the project schedule is achieved,with nearly ten million dollars in profit.