CAJ | 학술논문

甘肃陇南市武都区是5·12汶川8级地震重灾区,地震引发了大量滑坡和斜坡变形破坏,其中在汉林沟三家地老滑坡前缘引发了连续分布的H1, H2, H3三处滑坡,并堵塞沟道,是汶川地震在甘肃省境内引发的规模最大的地震滑坡。老滑坡后缘出现大规模贯通裂缝,严重威胁滑坡体上三家地村1732名村民的生命财产安全和灾后重建工作,也为汉林沟泥石流提供了丰富的松散固体物质。基于大量的调查、勘探和室内外试验,在综合分析滑坡特征和稳定性基础上,针对性的采取了前缘回填反压、地表排水、裂缝和落水洞夯填等综合治理措施。对治理效果进行了有限元(FEM)数值模拟,通过对比施加前缘反压工程前后滑坡的位移、最大剪应变和稳定系数的变化来分析治理工程效果。经过监测,滑坡处于稳定状态,证明治理效果良好。
감숙롱남시무도구시5·12문천8급지진중재구,지진인발료대량활파화사파변형파배,기중재한림구삼가지로활파전연인발료련속분포적H1, H2, H3삼처활파,병도새구도,시문천지진재감숙성경내인발적규모최대적지진활파。로활파후연출현대규모관통렬봉,엄중위협활파체상삼가지촌1732명촌민적생명재산안전화재후중건공작,야위한림구니석류제공료봉부적송산고체물질。기우대량적조사、감탐화실내외시험,재종합분석활파특정화은정성기출상,침대성적채취료전연회전반압、지표배수、렬봉화낙수동항전등종합치리조시。대치리효과진행료유한원(FEM)수치모의,통과대비시가전연반압공정전후활파적위이、최대전응변화은정계수적변화래분석치리공정효과。경과감측,활파처우은정상태,증명치리효과량호。
Wudu district of Longnan City was one of the heavy disaster areas during the 5 · 12 Wenchuan 8.0 magnitude earthquake and numerous landslides and slope deformation disasters were induced by the earthquake. Specifically, the earthquake triggered three continuous distribution landslides (number H1, H2, H3) in the forepart of the ancient Sanjiadi landslide in Hanlin valley. These landslides also were of the largest size of earthquake landslides in Gansu Province during the earthquake. A large scale of cracks formed at the rear of the ancient landslide, producing rich loose and solid matter for debris flow; therefore people’s lives and property and post-disaster reconstruction work have been seriously threatened. According to a substantial investigation, prospection and experimental data as well as a comprehensive analysis of the geologic surroundings, sliding features and stability of Sanjiadi landslide, the landslide was treated with backfill compaction, surface drainage, fracture and ponor backfilling measures, which have controlled the landslide effectively and protected Sanjiadi village from further disasters. A numerical simulation for the reinforcement effect was carried out by using the finite element method. Through a comparison of the changes in the landslide displacement and of the stresses and safety factors before and after the reinforcement, the reinforcement effect was illustrated and proved to be successful by nearly one year’s displacement monitoring.