CAJ | 학술논문

为研究隧洞开挖对滑坡渗流场、坡体变形及稳定性的影响，在对某滑坡滑体物理力学及水理性质进行研究的基础上，采用 Modflow 有限元差分三维软件对隧洞开挖前后的地下水位进行数值模拟计算，分析隧洞开挖后渗流场的变化，并以此结合 Geo-Studio 软件对滑坡处于天然及开挖情况下水位变化后的稳定性及变形进行了分析研究。结果表明：隧洞开挖后地下水渗流场发生改变，隧洞开挖处产生明显涌水现象，开挖2 a 后地下水位降低约20 m，开挖区形成明显“落水洞”，地下水位变化主要体现在滑坡前缘；隧洞上部2＃次级滑体在抗滑力减弱和有效应力增大的双重作用下变形加剧，其下滑带动1＃次级滑体变形。隧洞上部2＃次级滑体最大变形量12．42 cm，但滑坡的稳定性变化较小。
위연구수동개알대활파삼류장、파체변형급은정성적영향，재대모활파활체물리역학급수이성질진행연구적기출상，채용 Modflow 유한원차분삼유연건대수동개알전후적지하수위진행수치모의계산，분석수동개알후삼류장적변화，병이차결합 Geo-Studio 연건대활파처우천연급개알정황하수위변화후적은정성급변형진행료분석연구。결과표명：수동개알후지하수삼류장발생개변，수동개알처산생명현용수현상，개알2 a 후지하수위강저약20 m，개알구형성명현“낙수동”，지하수위변화주요체현재활파전연；수동상부2＃차급활체재항활력감약화유효응력증대적쌍중작용하변형가극，기하활대동1＃차급활체변형。수동상부2＃차급활체최대변형량12．42 cm，단활파적은정성변화교소。
The aim of this research is to investigate in landslide’s seepage field,slope deformation and stability af-fected by tunnel excavation.On the basis of analysing the physical and mechanical and water physical properties of a landslide slope,we simulated the variation of groundwater level and seepage field before and after tunnel excava-tion using 3D finite difference software Modflow.Furthermore,by employing Geo-Studio,we analyzed the stability and deformation of landslide after water level changed in natural and excavation conditions.Results reveal that the groundwater seepage field changed after tunnel excavation,and obvious water inflow was found at the excavation ar-ea.As a result,the groundwater level decreased about 20m and apparent “sinkholes”appeared in the excavation area.The change of groundwater level was mainly reflected in the front edge of landslide.The deformation of 2 #secondary sliding body,which caused the deformation of 1 #secondary sliding body,exacerbated under the com-bined actions of weakened sliding resistance and increased effective stress.The maximum slope deformation of sec-ondary landslide above the tunnel reached 1 2.42 cm,but the stability changed slightly.