The comprehensive prevention and control measures of debris flow along the Sichuan-Xizang Highway

The sand-sliding slope, which belongs to one of special types of debris flow, has been a common geohazard along the Sichuan-Xizang Highway. On the river bank of Palongzangbu along the Sichuan-Xizang Highway, the sand-sliding slope is characterized by wide distribution and serious damage. Based on several years' research and engineering practice, the authors classified the prevention and control measures for the sand-sliding slope into five sorts, i.e., avoidance and mucking, sand source control, sand consolidation, sand retaining and sand draining. To achieve the better control effect, we should select some prevention and control measures in a well-targeted manner and take into account the basic features and developmental stage of the sand-sliding slope and environmental conditions encountered by the Sichuan-Xizang Highway.