CAJ | 학술논문

在每年的库水位下降期间，三峡库区的许多滑坡都出现了较大变形。为了深入研究库水下降作用下滑坡的动态变形机理，评价和预测此类滑坡的稳定性及发展趋势，本文以白水河滑坡为例，在现场地质调查和详细地质勘查的基础上，充分利用十多年监测数据，分析其变形特征、失稳机理、影响因素及稳定性，预测了其变形发展趋势。研究结果表明在水库水位下降的过程中，由于滑坡岩土体渗透性能较差，地下水来不及及时排出，滞后于水库水位的下降，滑坡受到了坡体内地下水向外的渗透动水压力作用，从而使得滑坡稳定性降低。另外库水位下降速度越快，滑坡的位移速率也越大，表现出“阶跃型”动态变形特征。
재매년적고수위하강기간，삼협고구적허다활파도출현료교대변형。위료심입연구고수하강작용하활파적동태변형궤리，평개화예측차류활파적은정성급발전추세，본문이백수하활파위례，재현장지질조사화상세지질감사적기출상，충분이용십다년감측수거，분석기변형특정、실은궤리、영향인소급은정성，예측료기변형발전추세。연구결과표명재수고수위하강적과정중，유우활파암토체삼투성능교차，지하수래불급급시배출，체후우수고수위적하강，활파수도료파체내지하수향외적삼투동수압력작용，종이사득활파은정성강저。령외고수위하강속도월쾌，활파적위이속솔야월대，표현출“계약형”동태변형특정。
Many landslides in the Three Gorges Reservoir area have large deformation during the drawdown of reservoir water level every year.In order to study the dynamic deformation mechanism,stability and development trend of landslide during drawdown of reservoir water level,this paper takes Baishuihe landslide as an example.Based on the field geological survey,detailed geological exploration,and full use of monitoring data of more than ten years,the deformation characteristics,mechanism,influence factors and stability of landslide are analyzed in detail,and the deformation trend of landslide is predicted.Analysis results show that,during the drawdown of reservoir water level, underground water can not be discharged in time due to the landslide soil permeability is poor.Because decline speed of groundwater is much slower than that of reservoir water,increasing the seepage force in the landslide body apparently, and then further reduces the slope stability.The landslide deformation rate increases with the increasing of decline speed of reservoir water level,and the landslide deformation shows dynamic characteristic of step type.