CAJ | 학술논문

树坪滑坡自2003年三峡水库蓄水以来，就一直持续变形。为了对其稳定性及变形发展趋势进行评价和预测，有必要对其变形失稳机制进行深入研究。为此，采用现场地质调查和勘探的方法确定了滑坡的形态和性质；充分挖掘变形监测数据，详细分析了滑坡的变形特征。在此基础上，深入研究了变形失稳机制及影响因素，并对滑坡的稳定性进行了计算和预测。结果表明，滑坡区地形、岩性及地质构造等地质因素控制了树坪滑坡的形成和发展；库水位下降和大气降雨进一步激励了滑坡的变形。库水位下降，坡体内地下水位随之下降，但其速度远小于库水位下降速度，导致坡体内水力梯度和渗透力明显增大，从而使滑坡稳定性急剧下降，并且库水位下降速度越快，滑坡的位移速率也越大，是典型的水库下降型滑坡。在库水位下降过程中，若出现明显的降雨过程，更加剧了滑坡的变形，有产生大规模滑动的可能性，须采取防护治理措施。
수평활파자2003년삼협수고축수이래，취일직지속변형。위료대기은정성급변형발전추세진행평개화예측，유필요대기변형실은궤제진행심입연구。위차，채용현장지질조사화감탐적방법학정료활파적형태화성질；충분알굴변형감측수거，상세분석료활파적변형특정。재차기출상，심입연구료변형실은궤제급영향인소，병대활파적은정성진행료계산화예측。결과표명，활파구지형、암성급지질구조등지질인소공제료수평활파적형성화발전；고수위하강화대기강우진일보격려료활파적변형。고수위하강，파체내지하수위수지하강，단기속도원소우고수위하강속도，도치파체내수력제도화삼투력명현증대，종이사활파은정성급극하강，병차고수위하강속도월쾌，활파적위이속솔야월대，시전형적수고하강형활파。재고수위하강과정중，약출현명현적강우과정，경가극료활파적변형，유산생대규모활동적가능성，수채취방호치리조시。
Continuous deformation happened in Shuping landslide, since the impoundment of the Three Gorges reservoir from 2003. It is necessary to study the deformation and failure mechanism of Shuping landslide, in order to evaluate and predict the stability of landslide. The field geological survey and exploration are used to determine the form and property. The deformation characteristics of the landslide are analyzed in detail to make full use of monitoring data. The deformation mechanism and influence factors of landslide are studied based on investigation and monitoring; and the stability of landslide is calculated and predicted. Survey and analysis results show that, the geological factors, included topography, lithology and geological structure, control the deformation. The reservoir water fluctuation and rainfall trigger the deformation of Shuping landslide. Indeed, the relationship between slope groundwater fluctuation and reservoir water fluctuation primarily affected the deformation, especially during the decline process of slope groundwater with the drawdown of reservoir water. Because decline speed of groundwater is much slower than that of reservoir water, it increases the hydraulic gradient and seepage force in the landslide body apparently, and then reduces the slope stability, increases the landslide deformation rate especially when the sharp decline of reservoir water level. In addition, if the long-term or intensive rainfall occurs during the drawdown of reservoir water, more obvious deformation will happen and landslide might be failed. So the engineering control measures should be carried out.