湖北省三峡库区砂泥岩互层岩体劣化特征与劣化机理分析

Analysis of the Deterioration Characteristics and Mechanism of Sandstone-Mudstone Interbedded Rock Mass in the Three Gorges Reservoir Area of Hubei Province

受水位周期性变动影响,三峡库区地质环境产生复杂变化,尤其是对碎屑岩岸坡砂泥岩互层岩体劣化的影响显著。本文通过对湖北省三峡库区碎屑岩岸坡砂泥岩互层岩体进行现场调查,结合现场测试与室内试验成果,对比分析碎屑岩砂泥岩互层岩体两种结构单元的劣化差异,结合岸坡互层岩体的劣化现状,分析砂泥岩互层结构的岸坡岩体劣化变形过程,揭示砂泥岩互层岩体的劣化机理及其对岸坡致灾发展的影响,为后期合理进行岸坡岩体劣化评价及防治提供理论支撑。

Due to the periodic changes in water level,the geological environment in the Three Gorges Reservoir area undergoes complex changes,especially with a significant impact on the deterioration of the interbedded sandstone-mudstone rock mass on the clastic rock bank slopes.Through on-site investigation of the sandstone-mudstone interbedded rock mass on the bank slope of the Three Gorges Reservoir Area in Hubei Province,combined with on-site testing and indoor test results,this paper compares and analyzes the deterioration differences of the two structural units of the sandstone-mudstone interbedded rock mass in the clastic rock,and based on the degradation status of the interbedded rock mass on the bank slope,analyzes the degradation deformation process of the interbedded structure of sandstone-mudstone on the bank slope rock mass,and reveals the degradation mechanism of the interbedded rock mass of sandstone-mudstone and its impact on the development of bank slope disasters,thus providing theoretical support for the rational evaluation and prevention of bank slope rock mass degradation in the later stage.