CAJ | 학술논문

大坝建成后形成众多涉水滑坡.为研究库水位升降作用对涉水边坡稳定性的影响机制,基于重大涉水滑坡分类,针对浮托减重型滑坡,运用自主研制的滑坡模型试验系统,建立浮托减重型滑坡模型进行库水升降作用试验.试验结果表明,库水位升高,滑坡模型体内有效应力随之减小;库水位降低,有效应力随之增大.对于模型试验过程,运用Geo-studio软件进行渗流及稳定性计算,对照试验结果与数值模拟结果得出土压力及孔隙水压力渗流模拟变化情况与试验实测变化情况基本吻合.库水位上升阶段,滑坡稳定性系数随之减小;库水位下降阶段,滑坡稳定性系数随之降低.由此分析得出库水升降对浮托减重型滑坡稳定性的影响规律是:库水位上升引起滑坡体内阻滑段有效应力随之减小,导致滑坡稳定性降低;库水位下降引起滑坡体内阻滑段有效应力随之增加,使得滑坡稳定性提高.
대패건성후형성음다섭수활파.위연구고수위승강작용대섭수변파은정성적영향궤제,기우중대섭수활파분류,침대부탁감중형활파,운용자주연제적활파모형시험계통,건립부탁감중형활파모형진행고수승강작용시험.시험결과표명,고수위승고,활파모형체내유효응력수지감소;고수위강저,유효응력수지증대.대우모형시험과정,운용Geo-studio연건진행삼류급은정성계산,대조시험결과여수치모의결과득출토압력급공극수압력삼류모의변화정황여시험실측변화정황기본문합.고수위상승계단,활파은정성계수수지감소;고수위하강계단,활파은정성계수수지강저.유차분석득출고수승강대부탁감중형활파은정성적영향규률시:고수위상승인기활파체내조활단유효응력수지감소,도치활파은정성강저;고수위하강인기활파체내조활단유효응력수지증가,사득활파은정성제고.
Numerous wading landslides formed after dams were completed. In order to study the impact of the wading landslide’s stability induced by water level fluctuation. Based on the classification of significant wading landslide, in light of landslide of buoyancy weight loss, applying the self-made landslide model test system, and establishing the landslide model of buoyancy weight loss, the reservoir water level fluctuation test is carried out. The test results indicate that the effective stresses of the landslide model decrease with the reservoir water level increasing and increase with the water level lowering. For the model test, Geo-studio software is used to model the process of seepage and calculate the stability. By comparing the results of experiment and numerical simulation, it is shown that the changes of seepage simulation of earth and pore water pressure are basically consistent with changes of test results. The stability coefficient decreases with the reservoir water level increasing and rise with the water level lowering. The law of reservoir water level fluctuation on the buoyancy weight loss landslide stability is drawn as follows; that effective stresses of the landslide decrease with the reservoir water level increasing, resulting in lower landslide stability;effective stresses of the landslide increase with the reservoir water level lowering, so as to make the landslide stability increase.