张家沟滑坡治理工程及数值模拟

以青川张家沟滑坡为例，结合其工程地质条件和变形破坏特征，详细分析了其变形破坏原因和稳定性，提出了相应的治理工程措施，并运用FLAC3D软件对滑坡治理前后进行数值模拟。结果表明:滑坡的形态特征、岩土体松散的结构特征是滑坡失稳的先决条件，而降雨引起的地质环境的改变是滑坡失稳的诱发因素，桩板墙+截排水工程为主的治理措施有效地控制了滑坡的进一步变形，确保了滑坡的稳定，数值模拟结果与滑坡的实际变形和治理效果相吻合。 

Engineering treatment and numerical simulation of Zhangjiagou landslide

Based on Zhangjiagou landslide in Qingchuan, in combination with the engineering geological conditions and deformation and failure characteristics, the paper analyzed the deformation failure reason and stability in detail, revealed the relevant control engineering measures, and numerically simulated before and after the control engineering measures by FLAC3D. The results show that the morphological characteristics of the landslide and the loose structure characteristics of the soil-rock mass are the prerequisite of the landslide instability, while the change of geological environment caused by rainfall is an inducing factor of the landslide instability. The further deformation of landslide is effectively controlled by the control measures which mainly rely on sheet-pile retaining wall and drainage engineering and the stability of the landslide is ensured. The result of numerical simulation is identical with the actual deformation and control effect. It not only verified the effectivenes of the control engineering measures of the landslide, but also showed the rationality of the numerical simulation results.