海底沙波迁移过程原位观测简易装置设计与试验  

Design and test of in-situ observation device for submarine sandwave migration process

作　　者：沈泽中 贾永刚[1,2] 张少同 张博文 单红仙 刘晓磊[1,2] 

机构地区：[1]中国海洋大学环境科学与工程学院,山东青岛266100 [2]山东省海洋环境地质工程重点实验室,山东青岛266100

出　　处：《海洋工程》2017年第6期94-100,共7页The Ocean Engineering

基　　金：国家自然科学基金(41272316;41372287;41402253)

摘　　要：海底沙波的迁移对海底基础工程具有潜在危害,成为人们日益关注的热点。目前对海底沙波迁移过程的研究缺乏原位长期观测数据的支撑,设计一种海底沙波迁移过程的原位观测装置,通过水压差与高程差变化的对应关系来确定沙波的形态变化和迁移过程。并且在室内波浪水槽中对装置观测的可行性和观测结果的准确性进行验证,同时在仰口湾潮滩进行现场观测应用。该装置室内试验测量计算得到沙波表面高度变化5.9 cm,而观测得到沙波表面高度实际变化5.5 cm,两者吻合程度很好。试验结果表明,这套海底沙波迁移过程原位观测装置能对沙波外部形态变化进行测量且准确度较高,为海底沙波迁移的观测提供了新方法。The migration of submarine sandwave is potentially harmful to the submarine foundation engineering,which has become a hot spot of concern. At present,the study of migration process of submarine sandwave lacks long-term in-situ observation data. So in this paper,the in-situ observation device of the submarine sandwave migration process is designed and the morphological changes and migration process of sandwave are determined by the correspondence between water pressure difference and elevation difference variation. We use indoor wave flume tests to verify the feasibility of the observation of the device and the accuracy of the observation results,and apply the observation devices in the Yangkou tidal flat. The surface height change of the sandwave is 5.9 cm,which is calculated by the indoor test,and the actual height change of the sandwave surface is 5.5 cm. The experimental results show that the in-situ observation device of submarine sandwave migration process can measure the external shape of the sandwave and the accuracy is high,which provides a new method for the observation of the submarine sandwave migration.

关 键 词：海底沙波 迁移过程 原位观测 设计与验证 水槽试验 

分 类 号：P737.2[天文地球—海洋地质]