Soil Layer Structure and Wave Properties of Coral Reef in Maldives

Maldives is located in the tropical marine environment, with coral reef rock and soil widely developed. Through engineering geological drilling, laboratory test and wave velocity test, the stratigraphic structure and wave velocity characteristics of coral reef were studied. The results show that the coral reef soil in Maldives is composed of coral sand and coral reef limestone. According to the grain composition, the coral sand can be divided into fine medium sand and coarse gravel sand. According to the degree of cementation, the coral reef limestone can be divided into massive reef limestone and columnar reef limestone. The shear wave velocity of coral sand increases with depth, ranging from 156 m/s to 370 m/s, and the equivalent shear wave velocity is 262.3 m/s. According to the integrity coefficient, reef limestones can be divided into five types: extremely broken, broken, relatively broken, relatively complete and complete. Reef limestones show regular sedimentary cycles.