摘要
研究目的:晋东南地区分布有上第三纪(N_(2))杂色土地层,该地层矿物组成复杂、物理性质不稳定、化学性质多变且薄互层多、存在多级多层软弱结构面,使得该地区边坡稳定性差,致滑机理复杂、灾变风险高,给铁路工程建设带来巨大挑战。项目组开展理论和试验研究,揭示其复杂工程特性和致滑机理、提出防治技术,对于铁路工程的安全建设运营具有重要意义。研究结论:(1)通过研究分析杂色土地层物质成分、土显微结构,提出其物理力学指标,揭示了六大工程特性;(2)通过开展理论、试验研究,揭示了杂色土崩解机理、微裂隙发育机理以及其剪切变形、致滑机理;(3)研究提出了边坡稳定计算参数和方法,以及多维工程治理技术;(4)本研究成果可为杂色土分布地区其他铁路和公路工程建设提供借鉴。
Research purposes:The southeastern region of Shanxi Province is distributed with the Upper Tertiary(N_(2))variegated soil layer,which has a complex mineral composition,unstable physical properties,variable chemical properties,thin interlayers,and multiple layers of weak structural planes,resulting in poor slope stability,complex sliding mechanisms,and high risk of disasters,posing great challenges to railway engineering construction.The project team conducts theoretical and experimental research to reveal its complex engineering characteristics and slip mechanisms and proposes prevention and control technologies,which are of great significance for the safe construction and operation of railway engineering.Research conclusions:(1)By studying and analyzing the material composition and microstructure of variegated soil layers,their physical and mechanical indicators were proposed,revealing six major engineering characteristics.(2)Through theoretical and experimental research,the collapse mechanism,microcrack development mechanism,shear deformation,and sliding mechanism of variegated soil have been revealed.(3)The study proposed parameters and methods for slope stability calculation,as well as multidimensional engineering treatment techniques.(4)The research results can provide a reference for the construction of other railway and highway projects in areas with mixed-colored soil distribution.
作者
赵斗
ZHAO Dou(China Railway Design Corporation,Tianjin 300308,China)
出处
《铁道工程学报》
北大核心
2025年第6期15-19,共5页
Journal of Railway Engineering Society
关键词
晋东南
上第三纪(N2)杂色土
工程特性
工程对策
southeastern Shanxi
Upper Tertiary(N2)variegated soil
engineering characteristics
engineering countermeasures
