木里县水洛乡东拉滑坡安全监测及变形破坏分析  

Safety monitoring and deformation damage of Dongla landslide in Shuiluo of Muli County

作　　者：董建辉[1,2] 魏良帅[3] 唐然[2] 李大鑫[2] 邓韧[2] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059 [2]四川省地质工程勘察院,成都610072 [3]中国地质调查局探矿工艺研究所,成都611734

出　　处：《南水北调与水利科技》2015年第3期543-547,共5页South-to-North Water Transfers and Water Science & Technology

基　　金：国家自然科学基金项目(41102190)

摘　　要：木里县水洛乡东拉滑坡为一老滑坡复活体,剧烈变形约始于2011年,坡体拉裂缝遍布,变形累加遂产生大规模的滑动破坏。通过该滑坡现场变形特征调查,布设了地表位移观测墩、测斜孔、渗压计对滑坡体的变形和水位进行监测。通过对变形和水位监测成果进行了深入分析,根据累积位移-孔深曲线图、滑带位错-时间曲线、孔口累积位移与转动方位角-时间曲线图、地表位移与转动方位角-时间曲线图的对应关系,查明了滑动带的位置及厚度,确定了新滑面位于18.5~19.5m处的土体中,为阐明滑坡蠕滑变形破坏提供了可靠依据,该滑坡处于等速蠕滑变形阶段,随着时间发展,该滑坡将会处于加速变形阶段。研究工作系统总结了该滑坡的监测成果,对今后类似滑坡的勘查设计、监测和资料分析具有参考意义。Dongla landslide in Shuiluo of Muli County is an old landslide revival body. Its intensive deformation began in 2011 with tension cracks everywhere,and incremental deformation caused large-scale sliding and destruction. According to the in-situ deformation characteristics of landslide, surface displacement pier, inclinometer piezometers, and osmometers were installed to monitor the landslide deformation and water level variation. Based on the in-depth analysis on the deformation and water level monitoring results, and according to the cumulative displacement - hole depth curve, slide dislocation slip - time curve, orifice cumulative displacement and rotation azimuth - time curve, surface displacement and rotation azimuth - time curve, the location and thickness of a flew sliding surface were determined,which suggested that the new sliding surface is located in the soil layer of 18. 5 to 19.5 m. The results provided reliable reference for the illustration of creep deformation of landslide,which indicated that the landslide is currently in the creep deformation stage with constant speed but can enter into the accelerated deformation stage over time. The research summarizes the monitoring results of the landslide, and is beneficial to the survey design, monitoring, and data analysis of similar landslides.

关 键 词：滑坡 测斜孔 地表位移 变形 位移 

分 类 号：TV698.2[水利工程—水利水电工程]