鄂西南山区某公路滑坡—碎屑流灾害链形成机理探究  

Formation mechanism of highway landslide-debris flow disaster chain in mountainous area of southwestern Hubei

作　　者：林东云 王明华 陈仁权 Lin Dongyun;Wang Minghua;Chen Renquan(Hubei Jianyi Inspection and Testing Center Co.,Ltd.,Yichang 443000,China;Second Geological Brigade of Hubei Geological Bureau,Enshi 445000,China;Zhongjiang Minda International Engineering Design Co.,Ltd.,Chengdu 610096,China)

机构地区：[1]湖北建夷检验检测中心有限公司,湖北宜昌443000 [2]湖北省地质局第二地质大队,湖北恩施445000 [3]中匠民大国际工程设计有限公司,四川成都610096

出　　处：《资源环境与工程》2025年第1期69-74,共6页Resources Environment & Engineering

摘　　要：2020年6月29日,湖北省咸丰县G351国道永红沟段边坡发生大面积滑坡,形成体积约1.36×10^(5) m^(3)的滑坡—碎屑流堆积体,推覆掩埋了7500 m^(2)农田,部分稀性泥流冲击了2栋房屋建筑。运用无人机、地球物理测试等多种技术开展野外地质勘探,总结该公路滑坡—碎屑流灾害链形成的动力学过程和机理,对滑坡稳定性进行计算分析。结果表明,该公路地质灾害为典型的滑坡—碎屑流灾害链,属中型土质滑坡;滑坡失稳含内在和外在两方面影响因素,包括岩土体结构、人类工程活动、降雨等,工程活动是直接因素,降雨是重要触发因素;该公路滑坡—碎屑流灾害链形成过程分为4个阶段,即蠕滑→拉裂→剧滑→流动堆积。本案例对中国西南山区类似公路地质灾害勘查治理有一定参考意义。On June 29,2020,a large-scale landslide occurred on the slope of the G351 Yonghonggou section of National Highway in Xianfeng County,Hubei Province,forming a landslide debris flow accumulation body with a volume of about 1.36×10^(5) m^(3),covering and burying 7500 m^(2) of farmland,and partially impacting two buildings with dilute mud flow.Using various technologies such as drones and geophysical testing to conduct field geological exploration,summarize the dynamic process and mechanism of the formation of the landslide debris flow disaster chain on this highway,and calculate and analyze the stability of the landslide.The conclusion shows that the geological disaster on this highway is a typical landslide debris flow disaster chain,belonging to a medium-sized soil landslide.Landslide instability is influenced by both internal and external factors,including rock and soil structure,human engineering activities,rainfall,etc.Engineering activities are the direct factor,while rainfall is an important triggering factor.The formation process of the landslide debris flow disaster chain on this highway is divided into four stages,namely creep sliding→tensile cracking→severe sliding→flow accumulation.This project has certain reference significance for the geological hazard investigation and control of similar highways in the southwestern mountainous areas of China.

关 键 词：滑坡 碎屑流 灾害链 鄂西南 

分 类 号：P642.22[天文地球—工程地质学]