Coral reef is a special engineering construction site

which is influenced by geological origin

biological effects

marine hydrodynamic and geological environment

etc. The research on engineering geological division is not only important in understanding and evaluating the engineering properties of coral reef deposits

but also has important guidance on coral reef engineering design and construction. Based on field geological survey

in-situ tests

drilling and a large number of laboratory experiments

analyses are conducted for geological origin of coral reef stratum

landform

stratigraphic configuration

mineral and chemical composition

and physico-mechanical properties of coral reef sediments. It is concluded that coral reef in the coast of Sanya can be divided into lagoon depositional area

sandbar area and underwater live corals accumulation area. Finally

evaluation is carried out for the engineering characteristics of each division

and suitability of construction is analyzed. The results have important guidance for geological survey of coral reef and engineering planning & design.