金川水电站路基边坡稳定性分析与评价

Stability analysis and evaluation of subgrade slope of Jinchuan Hydropower Station

为研究金川水电工程进场公路路基边坡出现拉裂变形,且对边坡下部公路通行车辆和行人安全造成隐患的问题,通过现场勘察,分别采用极射赤平投影法和极限平衡法,对该岩质边坡稳定性进行了定性和定量分析,并相互验证。结果表明:该岩质边坡整体稳定较差,发育倾向岸外两组结构面与岩层面组合易形成不稳定楔形体,在天然工况下边坡处于欠稳定状态,在极端不利工况处于不稳定状态,易发生整体失稳。研究成果可为其他公路边坡拉裂变形稳定性分析提供借鉴。

In order to study the tensile cracking deformation of highway subgrade slope of Jinchuan hydropower proj⁃ect,which threat the safety of road traffic and pedestrian safety,based on the field investigation,stereographic pro⁃jection method and limit equilibrium method are respectively adopted to make the qualitative and quantitative analy⁃sis of rock slope stability for mutual corroboration.The results show that the overall stability of the rock slope is poor,and the combination of two groups of structural planes inclining toward to river bank and rock planes tends to form an unstable wedge body.The slope is in an less stable state under natural conditions,and in an unstable state under extreme unfavorable conditions,and the overall stability loss is easy to occur.The research results can pro⁃vide reference for other highway slope tensile deformation stability analysis.