Subsurface Investigation of Uniform Wharf at Naval Base Guam

This investigation determined mechanisms that caused earthquake damage to Uniform Wharf at Naval Base Guam. Navy vessel mooring is currently not allowed. Repairs were recommended that will allow full operational capability. Observed damage included deck subsidence, longitudinal fissures, and mis-aligned bulkhead. A subsurface excavation was conducted that exposed a tierod from the bulkhead to behind the anchor. In-situ and laboratory soil tests were conducted to determine fill properties. Groundwater and harbor water levels were measured and compared. Bulkhead lateral profile and surface elevations were surveyed. Exposed tierod and anchors were examined for defects, and alignments measured.