中国地质灾害与防治学报2025，Vol.36Issue(3)：27-38,12.DOI:10.16031/j.cnki.issn.1003-8035.202312015
康定—新都桥高速公路毛家沟泥石流发育特征及其动力学特性
Development characteristics and kinematic characteristic of debris flow in Maojia gully,Kangding-Xinduqiao Expressway
摘要
Abstract
Maojia gully is located in the high mountain canyon area of the western Sichuan and eastern Xizang transportation corridor,with strong terrain cutting,steep mountains,large reserves and wide distribution of loose material sources in gully,and frequent short-term heavy rainfall,which has the possibility of large-scale debris flow disasters.The comparison scheme of the proposed Kangding to Xinduqiao Expressway route selection needs to pass through Maojia gully,and the debris flow becomes an important factor controlling the geological route selection.In this paper,the morphological parameters of Maojia gully and its two large branches gullies were obtained by field investigation,remote sensing interpretation and GIS technology.By using the stormwater correction method,Matlab and Python were used to reveal the kinematic characteristic of debris flow,such as flow rate,velocity,depth of debris flow and overall impact force of debris flow in different parts of the channel and different rainfall frequencies,and systematically evaluated the level of threat of the two route selection schemes of Kangding-Xinduqiao Expressway by debris flow outbreak.The results show that when the rainfall frequency P=1％,Flow rate increases of 20.8％ to 122.9％ at the plugging and collapse points,the flow rate of N3 line 1# bridge(K line 1# bridge),N3 line 2# bridge and K line 2# bridge are 203.71,298.34,148.73 m3/s,and the affected height is 12.06,12.18,11.64 m,respectively.There is a risk that the piers of the 4 bridges will be silted attacked by debris flow impact,and debris flow early warning and management and protection measures will be vital.关键词
宽缓沟道型泥石流/动力学特性/孕灾环境/康新高速Key words
wide-gentle channeled debris flow/kinematic characteristic/disaster-prone environment/Kangding-Xinduqiao Expressway分类
天文与地球科学引用本文复制引用
白金钊,胡卸文,冯霄,何坤,周瑞宸,席传杰..康定—新都桥高速公路毛家沟泥石流发育特征及其动力学特性[J].中国地质灾害与防治学报,2025,36(3):27-38,12.基金项目
国家重点研发计划项目(2018YFC1505401) （2018YFC1505401）
国家资助博士后研究人员计划项目(GZB20230606) （GZB20230606）
