CAJ | 학술논문

为准确把握黄土坡临江I号崩滑体在水库运营期间的变形及稳定性演化动态，采用试验隧洞群的形式充分揭露崩滑体的地质结构及空间形态，并构建崩滑体双层滑带地质模型。采用饱和-非饱和渗流有限元算法获取其在水库运营期间地下水渗流场的动态变化过程，以此为基础研究崩滑体的变形和稳定性演化规律。研究表明，崩滑体的变形主要发生在库水位下降期间，且呈明显的牵引式运动特征，变形演化规律与 GPS 监测点实测数据相符；崩滑体的浅层滑坡在演化过程中受地下水渗流场动态变化的影响较大，因此，其稳定性系数的波动幅值也较大，其临界失稳水位下降速度为2.0 m/d。综合分析认为，黄土坡临江I号崩滑体整体稳定性相对较好，但浅层滑坡在降雨和库水位下降过程中存在局部失稳的可能。
위준학파악황토파림강I호붕활체재수고운영기간적변형급은정성연화동태，채용시험수동군적형식충분게로붕활체적지질결구급공간형태，병구건붕활체쌍층활대지질모형。채용포화-비포화삼류유한원산법획취기재수고운영기간지하수삼류장적동태변화과정，이차위기출연구붕활체적변형화은정성연화규률。연구표명，붕활체적변형주요발생재고수위하강기간，차정명현적견인식운동특정，변형연화규률여 GPS 감측점실측수거상부；붕활체적천층활파재연화과정중수지하수삼류장동태변화적영향교대，인차，기은정성계수적파동폭치야교대，기림계실은수위하강속도위2.0 m/d。종합분석인위，황토파림강I호붕활체정체은정성상대교호，단천층활파재강우화고수위하강과정중존재국부실은적가능。
In order to accurately grasp the deformation and stability evolution law of Huangtupo riverside slump-mass No.I during the reservoir operation, exploration tunnel group was firstly used to expose the geological structure and spatial form of the slump-mass, a geological model of double sliding zone was established based on the exposed information. Then the dynamic groundwater seepage field could be obtained by saturated-unsaturated seepage finite element method, based on which the deformation and stability evolution process was studied. The research showed that the deformation of slump-mass mainly occurred in front of shallow landslide during the drop of the water level, and has significant traction movement characteristics. The deformation evolution law was verified by measured data of global positioning system (GPS) monitoring point. Stability of the shallow landslide was fluctuated obviously during the evolution process because of the dynamic fluctuation of groundwater seepage field’s, and its critical instability velocity of drawdown of water level is 2.0 m/d. Consequently, the overall stability of Huangtupo riverside slump-mass No.I is fine;but there still exists a possible that the front of shallow landslide may be instable locally under rainfall and reservoir water level drawdown.