Application of high density electrical method to highway landslide geological survey

This article introduces a geophysics survey technique about high density electrical method and discusses the application of this method to highway landslide geological survey. Combining with borehole survey and surface survey, the terrain and geomorphological features have been revealed. At the same time, the thickness of Quaternary period covering layer and embedded depth of bedrock were measured. The survey data revealed that the landslide will slide along the potential surface of sliding under storm and continuous rainfall condition because of excavation of roadbed. By using the limit equilibrium analysis method, the landslide was instable-stable in the case of storm and continuous rainfall. So we must use some robust measurements such as anti-landslide piles to landslide and pile-plank wall to consolidate it. The investigation methods were reasonable and the conclusion was reliable.