中文摘要：

估计珊瑚礁石的稳定性是极其重要的。在最近的年里，种构造工程在华南海完全在礁石上被执行了。作为特殊海洋的 geotechnical 媒介，用礁石做的碎片经历了压倒性地长的地质的年龄。礁石在迟了的渐新世以后在碳酸盐站台上厚厚地成长并且有五～六主要沉积外形。测量最近的地震的出现时间能被用作一个录音机。礁石身体的一个模型被介绍在 Nansha 岛根据礁石的地质的结构特征学习地震的影响。而且， GeoStudio 被用来在各种各样的地震紧张下面在它以内模仿压力和变丑状况。一个安全因素被限制平衡方法计算，并且导致地震的山崩和滑动费率的可能的情形与滑动块方法，以及压力分发和变丑行为的 Newmark 被定义。因此，数字结果建议在珊瑚礁石和地震之间的连接如下：(1 ) 礁石身体在自我严肃状态下面有好稳定性；(2 ) 在地震以后，它可以引起斜坡不稳定性并且拿出当安全因素比 1 小时，暴跌(F _S <1) ；(3 ) 安全因素与增加的地震紧张减少，并且不久在特别价值附近波动；并且(4 ) 作为礁石的新发达部分，更小的浅山崩将容易易于地震引起的倒塌。为用一个 geotechnical 工程模拟方法评估珊瑚礁石的稳定性提供一本参考书是可行的，这被结束。这能在华南海帮助设计构造。

英文摘要：

It is exceedingly important to estimate the stability of coral reefs. In recent years, growing construction projects have been carried out on the reef flat in the South China Sea. As a special marine geotechnical medium, it is made of the reef debris underwent overwhelmingly long geological age. Reefs grow thickly on the carbonate platform after the Late Oligocene and have five to six main sedimentary facies. It can be used as a recorder to measure the occurrence time of recent earthquake. A model of reef body is presented to study the influence of earthquakes according to the geological structure characteristic of reefs in the Nansha Islands. Furthermore, Geo Studio is used to simulate stress and deformation situations within it under various earthquake intensities. A safety factor is calculated by the limit equilibrium method, and the possible scenarios of earthquake-induced landslides and sliding scale are defined with a Newmark sliding block method, as well as stress distribution and deformation behaviors. Therefore, the numerical results suggest that the connections between the coral reef and the earthquake are as follows：（1） the reef body has a good stability under self-gravity state;（2） after the earthquake, it may cause slope＇s instability and bring out slumping when the safety factor is smaller than 1（FS〈1）;（3） the safety factor decreases with the increasing earthquake intensity, and fluctuates around a particular value after a while;and（4） as a new developed part of the reef, the smaller shallow landslide will be easily subject to collapse caused by the earthquake. It is concluded that it is feasible to provide a reference for evaluating the stability of coral reef using a geotechnical engineering simulation method. This can help the engineering constructions in the South China Sea.