西藏某公路定线阶段敏达村大型滑坡勘察  

Exploration of a Large Landslide of a Proposed Highway Alignment Near Minda Village in Tibet

作　　者：唐俊[1] 何维山 宋正辉 TANG Jun;HE Weishan;SONG Zhenghui(Anhui Transportation Consulting & Design Institute Co.,Ltd.,Hefei,230088)

机构地区：[1]安徽省交通规划设计研究总院股份有限公司

出　　处：《土工基础》2018年第6期578-581,共4页Soil Engineering and Foundation

摘　　要：滑坡等不良地质危害大,治理费用高,影响工程造价甚至方案的可行性。在定线阶段辨别路线走廊带内的关键性滑坡,并进行针对性勘察,是选线成败关键。根据对敏达村大型滑坡的调绘,判断主滑方向,定性分析滑坡现状稳定性,采用钻探、物探、原位测试结合室内试验等方法进行综合勘察。一方面根据工程经验和软件反算,确定滑坡体岩土参数,另一方面通过定性分析和定量计算,评价边坡各种工况下的稳定性,估算滑动可能产生的方量,评价滑坡对工程的影响,并提出处治措施。The selection of highway alignment in the mountain area should consider the geological conditions.Geohazards in the mountain areas,such as,landslides,has the characterization of large influence area,high mitigation and maintenance cost and it might affect the feasibility of the highway alignment.In the phase of final alignment determination,if the potential landslide within the potential alignment alternates can be identified and explored,the highway alignment can be determined with much less construction and maintenance cost.The large landslide near Minda Village was investigated and the sliding limits were mapped,the principal sliding direction was determined.The stability of the landslide body was evaluated by using test borings,geo-physical methods and other in-situ as well as laboratory geotechnical testing methods.The geotechnical parameters at the sliding body were back analyzed and these are used in the stability evaluation of the proposed highway under various working conditions.The quantity of the potential landslide are also estimated and the mitigation methods are also proposed in the paper.

关 键 词：山区道路 地质选线 定线 滑坡 工程勘察 

分 类 号：P642[天文地球—工程地质学]