人民长江2018，Vol.49Issue(10)：54-59,6.DOI:10.16232/j.cnki.1001-4179.2018.10.011
干热河谷区泥石流活动特征及对交通干线的危害——以峨汉高速为例
Characteristics of debris flow activities in dry-hot valley and their impacts on major traffic arteries—a case study of E-Han Highway
摘要
Abstract
The debris flow activity is highly possible in dry-hot valley area, which poses a potential threat to major traffic trunk line project. Based on field investigation and remote sensing interpretation,this paper discusses the characteristics of debris flow activities in the E-Han highway section and the hazards of debris flow to the highway and the prevention and control model using debris flow parameters calculated by the commonly used methods. The results show that: ① The dry-hot valley area, where the E-Han highway located,has complex topographic conditions and great elevation difference,which are potential energy conditions for debris flowing. In the time and space,the rainfall is concentrated and rich,and the dry heat condition intensifies the formation of debris flow;the total material sources in Wawa gully,Banyang gully and Daxuan gully are 690.98×104,160.39 ×104,150.19×104m3,the effective dynamic reserves are 131.63×104,31.48×104,22.02×104m3, respectively, which provide abundant loose accumulative material for the debris flow formation. ② The debris flow velocity in the region is fast,the maximum flow velocity of the three gullies is 5.85 m/s. The debris flow discharge is large,among 3 gullies,Wawa gully is the largest and its debris flow discharges of 100-year return period and 50-years return period are 545.64,401.52 m3/s,respec-tively. The impact force of large rock in debris flow is great,maximum reaching 1797.01kN. ③The hazards of the debris flow to the E-Han highway is the pier scouring,erosion by debris flow and pier collision by big stones. The prevention measures are as follows:widening bridge pier span,constructing training and releasing project,protecting the slope and pier column.关键词
干热河谷区/泥石流/重大交通干线/峨汉高速/大渡河峡谷Key words
dry-hot valley/debris flow/major arterial traffic/E-Han highway/Dadu River Canyon分类
通用工业技术引用本文复制引用
高云建,陈宁生,赵春瑶,佘德彬..干热河谷区泥石流活动特征及对交通干线的危害——以峨汉高速为例[J].人民长江,2018,49(10):54-59,6.基金项目
国家自然科学基金项目(41501012) （41501012）
