川藏公路冷曲河段工程地质评价与分区

发布时间：2018-11-01 11:26

【摘要】：川藏公路冷曲河段工程地质条件差,地质灾害频发,严重影响行车安全和公路改扩建工程。深入系统地认识冷曲河廊道工程地质条件是保障工程建设和交通安全的科学基础。本文在工程地质条件分析的基础上,依据工程地质条件的差异进行了定性的工程地质分区与评价;选取坡度、地形起伏度、岩土体内摩擦角与粘聚力、断裂密度与活动性、外动力作用、水文地质条件等作为评价指标,利用层次分析法确定指标的权重值;采用工程地质指数与集对分析模型分别对工程地质区及亚区进行定量评价;将定量评价结果与定性评价结果进行对比并用公路灾害线密度进行验证,得出了较为合理的工程地质分区与评价结果;将研究区工程地质条件分为3个区和6个亚区,并编制了廊道工程地质分区图,结果可为川藏公路工程整治及防灾减灾提供参考。
[Abstract]:The poor geological conditions and frequent geological disasters in the Lengqu River reach of the Sichuan-Tibet Highway seriously affect the traffic safety and highway reconstruction and extension projects. Deep and systematic understanding of the engineering geological conditions of the Lengqu River corridor is the scientific basis for ensuring engineering construction and traffic safety. Based on the analysis of engineering geological conditions, the qualitative zoning and evaluation of engineering geology are carried out according to the difference of engineering geological conditions. The slope, topographic fluctuation, friction angle and cohesion of rock and soil, fracture density and activity, external dynamic action and hydrogeological condition are selected as evaluation indexes, and the weight value of the index is determined by AHP. Engineering geological index and set pair analysis model were used to evaluate the engineering geological area and sub-area respectively. The quantitative evaluation results and the qualitative evaluation results are compared with the highway disaster line density, and the reasonable engineering geological zoning and evaluation results are obtained. The engineering geological conditions in the study area are divided into 3 regions and 6 sub-regions, and the zoning map of corridor engineering geology is compiled. The results can provide a reference for the regulation of Sichuan-Tibet highway engineering and disaster prevention and mitigation.
【作者单位】：中国电建集团昆明勘测设计研究院有限公司;中国科学院水利部成都山地灾害与环境研究所中国科学院山地灾害与地表过程重点实验室;西南科技大学环境与资源学院;
【基金】：国家自然科学基金国际合作重点项目(41520104002) 国家科技支撑计划(2014BAL05B01)~~
【分类号】：U412.22

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