对“31 8”国道大甘坪滑坡进行了实地勘探 ,应用浅层地震法、电探法、机械钻探法等查明了滑坡工程地质、水文地质等情况 ,分析了滑坡成因。试验研究结果表明 ,产生滑坡是地形状况、地质条件、土质特点和工程施工等共同作用的结果。勘探和试验成果可用于研究滑坡的稳定性和提出滑坡治理方案 The on-the-spot exploration of the Dagangping landslide on “31 8” national highway was conducted. The shallow geotechnical method, the electric exploration method and the mechanical drilling method were used to ascertain the landslide engineering geology and hydrogeology. The cause of the landslide was analyzed. The experimental results show that landslides are the result of the combination of topography, geological conditions, soil characteristics and engineering construction. Exploration and test results can be used to study the stability of landslides and proposed landslide control programs