西藏南木林学玛崩塌灾害特征与防治对策

学玛崩塌位于西藏自治区南木林县卡孜乡学玛村后山,频繁发生崩塌灾害。为进一步研究学玛崩塌的形成机制和影响因素,提高国道G562安全运行的能力,文章在对学玛崩塌灾害地形地貌、气象水文、地层岩性、地质构造与地震以及人类工程活动等条件分析的基础上,结合学玛崩塌基本特征,对该崩塌的形成机制、影响因素以及破坏形式进行分析,最后针对该崩塌特点和致灾原因,提出有效的防治对策。研究表明:该岩质崩塌灾害规模等级属中型;影响因素主要包括地形地貌、节理裂隙发育、地震、降水、风化以及人类工程活动等;提出危岩清除、拦截工程以及巡查警示等防治措施建议,为今后该崩塌灾害治理提供基础资料。

Xuema collapse is located in the back mountain of Xuema Village,Kaz Township,Nanmulin County,Tibet Autonomous region,and collapse disasters occur frequently.In order to further study the formation mechanism and influencing factors of Xuema collapse and improve the ability of safe operation of national highway G562.In this paper,based on the analysis of topography,meteorology and hydrology,stratigraphic lithology,geological structure,earthquake and human engineering activities,based on the basic characteristics of Xuema collapse,the formation mechanism,influencing factors and destruction forms of the collapse are analyzed.Finally,according to the characteristics and causes of the collapse,the effective prevention and control countermeasures are put forward.The study shows that the scale of the rock collapse disaster is medium-sized,and the influencing factors mainly include topography and geomorphology,development of joints and cracks,earthquake,precipitation,weathering and human engineering activities,etc.Suggestions on preventive measures such as dangerous rock removal,interception engineering and inspection warning are put forward to provide basic data for the control of the collapse disaster in the future.