| 基于珊瑚礁岛分区分层的淡水形成过程研究 |
| |
| 引用本文： | 鞠远江,胡明鉴,刘阳,朱旭,秦坤坤.基于珊瑚礁岛分区分层的淡水形成过程研究[J].岩土力学,2022,43(5):1226-1236. |
| |
| 作者姓名： | 鞠远江 胡明鉴 刘阳 朱旭 秦坤坤 |
| |
| 作者单位： | 1. 中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室，湖北 武汉 430071；
2. 中国矿业大学 资源与地球科学学院，江苏 徐州 221116 |
| |
| 基金项目： | 国家自然科学基金项目（No.41572304,No.41877271）； |
| |
| 摘 要： | 为了探究土的分层特征对珊瑚礁岛下淡水透镜体形成的意义，在南海某珊瑚礁岛采用钻孔取样，分析每个钻孔不同层位样品的粒度。根据水平和垂直方向上的粒度特征，确定岛的水平分区和垂直分层；根据每个钻孔所代表的范围，确定每个水平分区的面积；根据每个钻孔中不同颗粒级配的样品所代表的厚度，确定每个垂直分层厚度。礁灰岩以上松散层的不同分区和分层的颗粒级配控制地层的渗透性，垂直和水平方向的渗透性特征控制淡水透镜体形成的难度、淡水透镜体的总厚度以及过渡带的厚度。根据岛的总面积和垂直分层数建立数值模型，得到不同时间、不同水平位置和垂直深度的地下水浓度特征的模拟结果。
|
| 关 键 词： | 珊瑚礁岛 海水淡化 岛的分区分层 |
| 收稿时间： | 2021-08-14 |
| 修稿时间： | 2022-03-25 |
Formation process of underground freshwater based
on zoning and stratification of coral reef island |
| |
| JU Yuan-jiang,HU Ming-jian,LIU Yang,ZHU Xu,QIN Kun-kun.Formation process of underground freshwater based
on zoning and stratification of coral reef island[J].Rock and Soil Mechanics,2022,43(5):1226-1236. |
| |
| Authors: | JU Yuan-jiang HU Ming-jian LIU Yang ZHU Xu QIN Kun-kun |
| |
| Institution: | 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 2. School of Resources and Geosciences, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China |
| |
| Abstract: | In order to understand the significance of stratum stratification characteristics during the formation of underground freshwater lens in the coral reef islands, the particle size distribution of the samples drilled at various depths of a coral reef island in the South China Sea is analyzed. The zone and stratification of the island are determined according to the particle size characteristics in the horizontal and vertical directions, respectively. The area of each zone is determined based on the range covered by each drilling, and the thickness of each stratum is determined by the thickness of the samples with similar particle size in each drill hole. The permeability of the strata is controlled by the particle size distribution of different zones and strata of the loose layer above the reef limestone, while the vertical and horizontal permeabilities control the difficulty of the underground freshwater lens formation, the total thickness of the freshwater lens, and the thickness of the transition zone. The numerical model is established by considering the total area of the island and the number of strata. Finally, the numerical results of groundwater concentration characteristics at different times, horizontal positions and depths are obtained. |
| |
| Keywords: | coral reef island seawater desalination zoning and stratification of island |
|
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
|
