摘要
淌里滑坡是三峡水库区地质灾害防治监测预警工程Ⅱ期专业监测点。监测方法为地表位移监测及滑体深部位移监测,同时开展长期地表宏观变形迹象监测调查。通过3a来监测资料的对比分析,各GPS变形监测点均在水平及垂直方向上有变形。即2007年2月位于滑坡前缘的WS-74、WS-75点水平位移分别达到726.91mm及170.88mm,平均年变形速率分别为340mm和80mm;位于滑体下部的WS-75钻孔滑带位置变形明显。该钻孔在2005年5月由于深部位移变形超出测试量程而无法继续监测。在2003年10月至2005年5月20个月内,该钻孔滑带位置累计位移量达46mm以上,月平均变形率达2.3mm。以此变形速率发展,至2006年12月,滑带累计位移变形量将在100mm左右。滑坡的变形集中在滑坡的前缘地带及次级滑坡,从2003年至今,宝子滩崩滑体附近已有将近20×104m3的崩塌堆积层滑入江中。目前滑坡处于匀速变形阶段,为不稳定状态,滑坡区内的4户18人和宝子滩民用码头的安全受到威胁。
Tangli Landslide is the second professional monitoring spot for the monitoring and pre-waming project of geological hazards in the three gorges reservoir area. The monitor methods include surface displacement monitoring and landslide mass deep displacement monitoring, and the long-term survey for surface displacement. Through three years＇ monitoring deformation analysis, every GPS monitoring point has displaced in both horizontal and vertical directions. By February 2007 the displacements of WS-74,WS-75 GPS monitoring point in the front of landslide are 726.91mm and 170.88mm, the displacement rates are 340mm and 80mm per annum. The WS-75 bore hole in the front of landslide has obviously deformation, and in May 2005 this hole can not use anymore because it overstepped the deep displacement monitoring range. From October 2003 to May 2005, the displacement in the slipband achieved 46mm, the displacement rate was 2.3 mm per mensem. At this displacement rate, the displacement in the slipband will achieve 100 mm by December 2006. The deformation of the landslide focuses on the front and the sub landslide, since 2003 to now the Baozitan landslide mass has 0.3 million Cubic meter congeries slip to the Yangtse River. At present, the landslide is displacing at a uniform speed, and an unstabl6 status. The safety of 4 houses and 18 people and Baozitan dock is subjected to threat.
出处
《中国地质灾害与防治学报》
CSCD
2008年第1期22-27,共6页
The Chinese Journal of Geological Hazard and Control
关键词
淌里滑坡
监测
变形分析
变形速率
三峡水库区巫山县
Tangli Landslide
monitoring
deformation analysis
deformation
Wuhan County, Three Gorges Reservoir area
作者简介
杨秀元（1980-），男，助理工程师，学士学位，主要从事地质灾害监测与防治工作。
