铁道标准设计2024，Vol.68Issue(3)：37-42,64,7.DOI:10.13238/j.issn.1004-2954.202304190004
吉图珲高铁延吉膨胀岩土工程特性与边坡治理研究
Research on the Engineering Characteristics and Slope Treatment of Swelling Rocks in Yanji Area on Jilin-Tumen-Hunchun High-speed Railway
摘要
Abstract
Based on the GDK279 slope of Jilin-Tumen-Hunchun High-speed Railway,research and analysis are conducted on the engineering characteristics of swelling rock in severe cold areas,slope deformation characteristics,determination of sliding surfaces(zones)and selection of geotechnical parameters,and stability analysis and exploration of engineering governance strategies are carried out.Research shows that the swelling rocks in Yanji area mainly include two types:Cretaceous mudstone,muddy sandstone,and Quaternary cohesive soil with angular gravel,crushed stones,block stones,and sporadic basalt boulders.The microstructure of clay minerals is mainly sheet-like,with a moderate to strong expansion potential.The surface soil is subjected to long-term and repeated freeze-thaw cycles,with developed fissures and loose structures.The cohesive soil layer contains a large amount of coarse grained breccia and gravel,forming a structure of water seepage and storage.There are many discontinuous surfaces caused by mixing,which is inconducive to the stability of the slope.After long-term unloading,atmospheric rainfall and weathering,the slope slides and deforms along the weak structural surface or soil rock interface,which can be attributed to step traction and multi-layer sliding.According to the design concept of"combination of active and passive support,coordinated drainage of sliding bodies and surface interception and drainage",the slope treatment is effective.After the treatment,the GDK279 slope has been stable for nearly a decade,and its experience can provide reference for similar landslide engineering treatment.关键词
高速铁路/膨胀岩土/冻融循环/变形特征/稳定性分析/边坡治理Key words
high-speed railway/swelling rocks/freeze-thaw cycle/deformation characteristics/stability analysis/slope treatment分类
交通工程引用本文复制引用
韩志霞,邓帅,崔俊杰,姚瑞珽..吉图珲高铁延吉膨胀岩土工程特性与边坡治理研究[J].铁道标准设计,2024,68(3):37-42,64,7.基金项目
中铁工程设计咨询集团有限公司科研项目(研2013-09) （研2013-09）
