Highway Debris Flow Disaster Risk Assessment Study

Debris flow hazard is one of the geo-hazards often happen in the mountain area, it restrict the economic development of mountain area seriously because of the characteristic simultaneity, mass occurrence, short continuance but strong abruptness. As the Development of the West Regions, our country has increase the power to control the geo-hazards of the mountain area gradually, as one of the important non-engineering cautions against the debris flow hazard, the debris flow risk assessment has drawn more and more attention to the research scholar. However, because of the complexity and the non-certainty of the formation mechanism and the flow character, the current research in this field are far from requirements of guarding against or reducing hazard in the mountain area. Targeted on the limits of the current research of the risk assessment of the debris flow hazard, the present paper rely on the Sichuan Traffic Department research item "the research of the startup mechanism and the prevention countermeasure to the debris flow hazard ", and base on the research background of the prevention of the debris flows along to the highway in Sichuan province from Ya(an) to Lu(gu), the present paper research on the debris flow risk assessment of the highway, in order to guide practice with the academic research and provide the technological support to the prevention of the highway debris flow hazard. Base on this, the present paper doing corresponding research and get some research fruits in the following aspects:1. The systemic study of the risk assessment literature at home and abroad establish a firm theory foundation to the research of the debris flow risk assessment, and the field investigation along the Ya(an) to Lu(gu) highway which last for more than a month provide a reliable bases for the parameter-getting of the debris flow risk assessment;2. Base on the field investigation of the debri flow, the present paper select the differentiate method of the rainstorm-induced debris flow hazard in southwest mountain region, and establish good basement to the prevention of the debris flow hazard by differentiate the debris flow valley along the YaLu highway; 3. in order to search the suitable method to the debris flow assessment, the present paper research on the debris flow valley along the highway, assessing the debris flow hazard of the highway by selecting the debris flow hazard assessing model base on the improving debris flow hazard entropy method. So as to discuss the hazardous degree of the debris flow of the highway;4. Targeted on the research on the vulnerability of the nature hazard at home and abroad, the present base on the research background of engineer vulnerability of the debris flow hazard-bearing body, discuss the disaster resistance capability of the highway infrastructure by research on the engineer vulnerability of the highway infrastructure;5. Base on the research of the debris flow hazard and the engineering vulnerability of the highway hazard-bearing, the paper get the debris flow risk level of the highway according to the concept of the hazard risk assessment, and this will provide the technical support to the design, construction and the prevention of the debris flow of the highway.6. Base on the research of the engineer vulnerability assessment of the countermeasures of the debris flow, the present paper research on the modify to the debris flow riskment of the highway infrastructure on different vulnerability degree of the the countermeasures, and provide the adjustment evidence of the debris flow Countermeasures to the administrator of the highway.