摘要
以持续性强降雨后郑太客运专线路基状态的检测评估为依托,厘清强降雨致损机理与路基水害类型,建立了强降雨后路基状态调查检测与评估方法,系统分析了该铁路路基的水害特征与产生原因并给出工程修复对策。结果表明:持续性强降雨下路基水害主要表现为冲刷作用产生的路基表层破坏和入渗作用诱发的路基内部侵蚀;雨后路基水害多发生于过渡区段的半填半挖路基和高路堤结构中,主要有差异沉降、不均匀沉降、坡面浅层滑动、整体滑移等;填料中细颗粒含量较高、路基结构形式设计、地形等是水害产生的客观条件,降雨作用下土水之间的相互作用是水害产生的内部机理。
Based on the inspection and evaluation of the subgrade condition of the Zhengzhou-Taiyuan passenger dedicated line after persistent heavy rainfall,the damage mechanism caused by heavy rainfall and the types of subgrade water damage were clarified.The method of investigation,inspection and evaluation of subgrade state after heavy rainfall was established.The characteristics and causes of water damage of the railway subgrade were analyzed systematically,and the countermeasures of engineering repair were given.The results show that subgrade water damage under persistent heavy rainfall is mainly manifested as subgrade surface damage caused by scour and subgrade internal erosion induced by infiltration.Subgrade water damage occurs mostly in the semi-filled and semi-cut subgrade and high embankment structure in the transition section after rain,which mainly includes differential settlement,uneven settlement,shallow slope slip,and overall sliding,etc.The high content of fine particles in the filler,the design of subgrade structure and the distribution of topography are the objective conditions for the generation of water damage.The interaction between soil and water under the action of rainfall is the internal mechanism of the generation of water damage.
作者
邓逆涛
陈锋
刘杰
张栋
王李阳
李泰灃
DENG Nitao;CHEN Feng;LIU Jie;ZHANG Dong;WANG Liyang;LI Taifeng(Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)
出处
《铁道建筑》
北大核心
2023年第4期88-93,共6页
Railway Engineering
基金
中国铁道科学研究院集团有限公司基金(2021YJ072)
中国铁路太原局集团有限公司科技研究开发计划(2022G03)。
关键词
铁路路基
持续性强降雨
检测评估
水害类型
原位测试
修复对策
railway subgrade
persistent heavy rainfall
inspection and evaluation
type of water damage
in situ testing
repair countermeasures
