寒旱区公路高边坡滚石灾害评价——以G219公路乌克尔朝龙沟至松树沟段为例  

Assessment of rockfall hazard at highway high slopes in cold-arid areas:a case study of the Wukeerchaolong gully-Songshu gully section of the G219 highway

作　　者：杨朋 李严严 尚彦军[5] 王辉伦 YANG Peng;LI Yan-yan;SHANG Yan-jun;WANG Hui-lun(Tianjin Centre,China Geological Survey,Tianjin 300170,China;Key Laboratory of Coast Geo-environment,China Geological Survey,Tianjin 300170,China;North China Center for Geoscience Innovation,China Geological Survey,Tianjin 300170,China;Faculty of Urban Construction,Beijing University of Technology,Beijing 100124,China;Key Laboratory of Shale Gas and Geoengineering,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;Xindikan Geotechnical Engineering Investigation and Design Co.,Ltd.,Urumqi 830091,China)

机构地区：[1]中国地质调查局天津地质调查中心,天津300170 [2]中国地质调查局海岸带地质环境重点实验室,天津300170 [3]中国地质调查局华北地质科技创新中心,天津300170 [4]北京工业大学城市建设学部,北京100124 [5]中国科学院地质与地球物理研究所页岩气与地质工程重点实验室,北京100029 [6]新疆新地勘岩土工程勘察设计有限公司,乌鲁木齐830091

出　　处：《华北地质》2022年第3期77-86,共10页North China Geology

基　　金：国家自然科学基金面上项目“岩体结构控制作用随深度变化对比研究(41372324)”;中国地质调查局项目“黄渤海海岸带重点生态保护修复区综合地质调查(DD20211301)”;中国地质调查局项目“京津冀协同发展区暨雄安新区资源环境承载能力监测评价(DD20221727)”。

摘　　要：在强烈物理风化而导致岩体破碎的新疆西北部山区,岩崩滚石是公路边坡最常见的地质灾害之一。G219线吉木乃至和布克赛尔公路乌克尔朝龙沟至松树沟段地质灾害调查结果显示,高边坡滚石对预建公路通行车辆及人身安全构成严重威胁。本研究综合运用现场调查、室内试验和数值模拟等方法对研究区内高边坡滚石进行识别、模拟及滚石灾害评价,结果表明研究区内共有5处潜在高风险高边坡滚石灾害。以滚石动能和堆积率为基础对滚石影响区域进行划分,5处高边坡上公路依次位于中强度低堆积区、高强度中堆积区、高强度低堆积区、高强度低堆积区和低强度高堆积区。为减轻滚石灾害避免意外事故发生,笔者提出相应防护措施:对高边坡上较小的不稳定块体可采取人工清除或拦护网拦截,对于较大不稳定块体可使用锚杆加固,并在坡脚修筑挡土墙或拦截沟。In the steep mountainous areas,in northwest Xinjiang,where rock is broken seriously due to intense physical weathering,rockfall is one of the most common geological hazards along highway slopes.Engineering geological investigation on geological hazards along the Wukeerchaolong gully-Songshu gully section of the G219 line of Jimunai-Hebukesaier highway in northwest Xinjiang was conducted which indicates that rockfall on the high slopes threatens the safety of people’s life and property and the vehicular traffic travelling on the highway seriously.In this study,a combination of field investigations,laboratory experiments and numerical simulation methods were performed to identify and simulate the rockfall on the high slopes,and to assess the rockfall hazard in the study area.The results show that there are five high slopes where rockfall hazard is extremely serious,and based on the total kinetic energy and the accumulation rate of the rockfall the zonation of the areas suffered from the rockfall was performed,leading to the conclusions that the highway on the five high slopes is located at medium-intensity low-accumulation area,high-intensity medium-accumulation area,highintensity low-accumulation area,high-intensity low-accumulation area and low-intensity high-accumulation area respectively.Finally,in order to reduce the rockfall hazard and avoid the fatalities effectively,proper preventive measures have been suggested.For the small unstable blocks we can trim and remove them or use restraining nets.For the big ones,rock bolts and the construction of retaining walls and catch ditch at the toe of the slope can be adopted.

关 键 词：寒旱区 公路高边坡 滚石灾害 动能 堆积率 区域划分 

分 类 号：P694[天文地球—地质学] U416[交通运输工程—道路与铁道工程]