【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。更多还原

【Abstract】 In this paper,the monitoring data of Beichangshan Island coast landslide from March 2012 are obtained from the periodical and real time monitoring and warning system,which was established combining techniques such as unmanned aerial vehicle remote sensing,ground penetrating radar,3Dlaser scanner and displacement sensors.Beichangshan Island coastal landslide is located near Shanhou Village,Changdao County,Shandong Province.It is extremely unstable due to the steep quarry face formed by unreasonable operation.The existence of joints and cracks as well as phyllite strata is the main internal factor of the landslide.And the main external factor is extreme conditions such as artificially quarrying and heavy rains.The mountain body tends to downslide on the whole,with the top showing a tensional outward trend.The cumulative sliding distance is more than 30 cm and the change of altitude is about 5-10 cm.The sliding distance has a strong positive correlation with the precipitation(i.e.a large sliding during heavy rain and a minor sliding during a light rain).The landslide might be unstable when the daily rainfall is over 80 mm.Natural factors and human factors both lead to the occurrence of the Beichangshan Island landslide,which makes the island landslide study of great importance.更多还原