在南海东岛牛塘海鸟粪土沉积层中发现一岩性明显不同于上、下层位的珊瑚砂夹层。
The sediment cores from "Cattle Pond" on Dongdao Island of South China Sea contain a coral sand sediment layer embedded by ornithogenic sediments with sharp stratigraphic contacts.
本文在模型实验基础上，采用有限元方法，对砂、软弱夹层和连续墙三种材料的组合结构进行了非线性分析。
In this raper, a model of continuous wall inserting in sand with a thin layer of grease as a slide surface has been loaded laterally in laboratory.
本文将复合砂体劈分与隔夹层结合研究。
This paper has tried to combined the disjoining of complex sand-body with the interlayers.
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