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Numerical Simulation for Shallow Strata Stability of Coral Reef in the Southwest of Yongshu Reef (South China Sea)
Tang, QQ; Zhang, JC; Feng, YC; Li, J; Yao, YT; Sun, J; Zhan, WH; whzhan@scsio.ac.cn
2018
Source PublicationJOURNAL OF OCEAN UNIVERSITY OF CHINA
Volume17Issue:4Pages:763-772
AbstractIn recent years, infrastructure construction on coral reefs has been increasingly developed. Therefore, the shallow strata stability of coral reefs in the South China Sea should be evaluated. This study aims to investigate the profiles for the shallow strata of coral reefs in the southwest of the Yongshu Reef, particularly in the hydrodynamic marine environment, and to establish a geological model for numerical simulation using Geo-Studio. The shallow strata of the coral reefs include mass gravel, sand gravel, mid-coarse sand, silty sand, fine sand, and reef limestone. The shallow reef slope near the lagoon is similar to a 'layer cake', in which the side close to the sea is analogous to a 'block cake'. The simulation results showed that coral reef stability depends on wave loads and earthquake strength and on the physical properties of coral reefs. The factor of safety for the outer reef is greater than 10.0 under static, wave, and seismic conditions; this indicated that the outer reefs were less affected by waves and earthquakes. However, the factor of safety next to the lagoon varied from 0.1 to 5.3. The variation was primarily caused by the thick strata of coral reefs close to the sea (reef limestone, typically with the thickness > 10 m and equivalent to a block). The soil and rock layers in the coral reef strata with thicknesses < 10 m showed weak engineering geological characteristics. Our findings can provide useful information to future construction projects on coral reefs.
Department[Tang, Qinqin; Zhang, Jinchang; Feng, Yingci; Li, Jian; Yao, Yantao; Sun, Jie; Zhan, Wenhuan] Chinese Acad Sci, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China; [Tang, Qinqin; Feng, Yingci; Li, Jian; Zhan, Wenhuan] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Subject AreaOceanography
WOS Keywordcoral reefs ; rock mass structure ; stability evaluation ; numerical simulation
Funding ProjectMSG
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/17124
Collection中科院边缘海地质重点实验室
Corresponding Authorwhzhan@scsio.ac.cn
Recommended Citation
GB/T 7714
Tang, QQ,Zhang, JC,Feng, YC,et al. Numerical Simulation for Shallow Strata Stability of Coral Reef in the Southwest of Yongshu Reef (South China Sea)[J]. JOURNAL OF OCEAN UNIVERSITY OF CHINA,2018,17(4):763-772.
APA Tang, QQ.,Zhang, JC.,Feng, YC.,Li, J.,Yao, YT.,...&whzhan@scsio.ac.cn.(2018).Numerical Simulation for Shallow Strata Stability of Coral Reef in the Southwest of Yongshu Reef (South China Sea).JOURNAL OF OCEAN UNIVERSITY OF CHINA,17(4),763-772.
MLA Tang, QQ,et al."Numerical Simulation for Shallow Strata Stability of Coral Reef in the Southwest of Yongshu Reef (South China Sea)".JOURNAL OF OCEAN UNIVERSITY OF CHINA 17.4(2018):763-772.
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