Model and Method of Debris Flow Risk Zoning Based on Momentum Analysis  

作　　者：WEI Fangqiang ZHANG Yu HU Kaiheng GAO Kechang 

机构地区：[1]Institute of Mountain Hazards and Environment,Chinese Academy of Sciences, Chengdu 610041, Sichuan,China [2]Dongchuan Station of Debris Flow Observation and Research, Chinese Academy of Sciences, Dongchuan 654112,Yunan, China

出　　处：《Wuhan University Journal of Natural Sciences》2006年第4期835-839,共5页武汉大学学报（自然科学英文版）

基　　金：SupportedbytheNationalNaturalScienceFoun-dationofChina(40201009)

摘　　要：A model of debris flow risk zoning is carried out with momentum analysis of debris flow. This model zones the debris flow inundation fan with density and velocity calculated by numerical simulation. The risk classification standard is determined according to the ultimate bearing capacities of different structures under impacting. And the ultimate bearing capacities are tested by impact failure experiment of destruction. Two structures typical in Chinese mountain towns, reinforced concrete frame construction and brickwork with concrete, are chosen in the experiment. The model makes debris flow risk zoning quantitative and the results comparable widely. The results differ much from that of other methods especially in the identification of medium and low risk zones.A model of debris flow risk zoning is carried out with momentum analysis of debris flow. This model zones the debris flow inundation fan with density and velocity calculated by numerical simulation. The risk classification standard is determined according to the ultimate bearing capacities of different structures under impacting. And the ultimate bearing capacities are tested by impact failure experiment of destruction. Two structures typical in Chinese mountain towns, reinforced concrete frame construction and brickwork with concrete, are chosen in the experiment. The model makes debris flow risk zoning quantitative and the results comparable widely. The results differ much from that of other methods especially in the identification of medium and low risk zones.

关 键 词：debris flow risk zoning MOMENTUM ultimate bearing capacity 

分 类 号：P642.23[天文地球—工程地质学]