山东省北长山岛海岸滑坡演化特征及成因机制

发布时间：2018-01-12 05:28

  本文关键词：山东省北长山岛海岸滑坡演化特征及成因机制　出处：《海洋学报》2016年09期 　论文类型：期刊论文

  更多相关文章： 北长山岛 海岸滑坡 监测预警

【摘要】：通过无人机航拍、探地雷达、三维激光扫描仪和位移传感器等技术手段建立的海岸滑坡周期性和实时性监测预警系统,获得了2012年3月至2014年9月的北长山岛海岸滑坡体监测数据。山东省北长山岛海岸滑坡位于长岛县山后村附近,因开山采石造成山体陡立形成临空危险面而处于极不稳定的状态,内部节理和裂隙及千枚岩层的存在是滑坡发生的主要内在因素,而人为采石和暴雨等极端条件是导致滑坡发生最重要的影响因素。山体呈现整体下滑而顶部向外拉张的趋势,累计滑动距离超过0.3m,高程变化5.0~10.0m,具有大雨大滑、小雨小滑的特点,其滑动距离与降雨量具有很强的正相关性,日降雨量大于80mm时滑坡体失稳。自然因素与人为因素共同导致了北长山岛滑坡体的发生,其成因机制特别是极端天气条件下的演化特征研究对丰富和发展海岛滑坡地质灾害监测预警理论体系具有十分重要的意义。
[Abstract]:Based on UAV aerial photography, ground penetrating radar, 3D laser scanner and displacement sensor, the periodical and real-time monitoring and warning system of coastal landslide is established. From March 2012 to September 2014, the slope body monitoring data of North Changshan Island were obtained. The coast landslide of North Changshan Island in Shandong Province is located near Shanhou Village, Changdao County. The mountain body is in a very unstable state because of the steep standing of the mountain body caused by Kaishan quarrying. The existence of internal joints and fissures and phyllite are the main internal factors for the occurrence of landslide. The extreme conditions such as artificial quarrying and rainstorm are the most important factors to cause the landslide. The mountain body shows the trend of overall sliding and the top of which is stretched out. The cumulative sliding distance is more than 0.3 m. The variation of elevation is 5.0 ~ 10.0 m, which has the characteristics of heavy rain and light rain, and its sliding distance has a strong positive correlation with rainfall. The landslide body is unstable when the daily rainfall is more than 80mm. The natural and human factors lead to the occurrence of the landslide body in North Changshan Island. The study of its genetic mechanism, especially the evolution characteristics under extreme weather conditions, is of great significance to enrich and develop the monitoring and early warning theory system of island landslide geological hazards.
【作者单位】： 国家海洋局第一海洋研究所海洋沉积与环境地质国家海洋局重点实验室;青岛海洋科学与技术国家实验室海洋地质过程与环境功能实验室;平邑县住房和城乡建设局;
【基金】：国家自然科学基金(41206054) 我国典型海岛地质灾害监测及预警示范研究(201005010) 国家基金委-山东省联合基金项目(U1606401)
【分类号】：P642.22;P736
【正文快照】： 273300)1引言海岛地质灾害系指对海岛人民生命财产造成直接损失,或对海岛地质、生态环境和地貌景观造成破坏,并影响海岛经济社会发展和间接造成损失的分布于岛陆、岛岸、环岛近岸海域的地质现象和地质作用[1]。随着沿海经济的快速发展和空间资源的日趋紧张,迅猛的海岛开发导致，

本文编号：1412910