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. 5 m 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。

Dong la landslide in Shuiluo of M uli Co unty is an o ld landslide revival body. Its intensive deformation beg an in 2011 wit h tension cracks ev eryw here, and incr emental defo rmatio n caused lar ge2scale sliding and destruction. Accor ding to the in2situ deformatio n character istics of landslide, surface displacement pier , inclinometer piezometers, and osmomet ers w ere installed to monitor the landslide deformatio n and w ater level var iatio n. Based o n the in2depth ana lysis on the deformat ion and water level monitor ing results, and acco rding to the cumulat ive displacement2 hole depth curv e, slide dislocatio n slip2 time curve, or ifice cu2 mulat ive displacement and r otation azimuth2 time curv e, surface displacement and rotat ion azimuth2 time cur ve, the location and thickness o f a new sliding sur face w ere determined, w hich sugg ested that t he new sliding surface is located in the soil layer of 18. 5 t o 19. 5 m. T he results pr ovided r eliable refer ence fo r the illustr ation of cr eep defo rmatio n of landslide, w hich indicat ed t hat the landslide is currently in the creep defo rmation stag e w ith co nstant speed but can enter into the acceler ated defo rmatio n stag e over time. T he r esea rch summarizes the monito ring results o f the landslide, and is beneficial t o the surv ey desig n, monit or ing , and data analysis of similar landslides.

国家自然科学基金项目( 41102190)