摘要
为分析江苏省长江口某中型水闸的异常变形原因,通过变形监测、地基承载力计算、放水试验和闸基无损探测、钻孔取芯验证等综合诊断,研究了水闸整体变形发展规律和不同运行工况下闸基土层塑性区的开展深度、闸基地层的渗漏状态与物理现状。结果表明:闸基地层透水性较大、局部止水设施失效、渗透路径缩短,导致闸基发生渗透破坏,进而使闸基出现多处不密实或欠密实区和高含水率区,闸基承载力不能满足要求,从而引起水闸发生异常变形。研究成果为类似病险水闸的安全鉴定工作提供一定的技术参考。
In order to analyze the cause of abnormal deformation of medium sluice in Yangtze Estuary,Jiangsu Province,comprehensive methods such as deformation monitoring,foundation bearing capacity calculation,water release test,non-destructive detection of sluice foundation,drilling core verification,etc.,were used for diagnosis.The development law of sluice deformation,the developing depth of plastic zone of foundation,the leakage state and physical status of sluice base were obtained.The results showed that the high soil permeability,the destroyed local water stop facilities,and the shortened seepage path,led to the seepage damage of sluice base.As a result,a number of under-dense areas and high water content areas appeared in the base.The bearing capacity of sluice base could not meet the requirements,which led to the abnormal deformation of the sluice.The research can provide technical reference for the safety identification of similar dangerous sluices.
作者
高军军
汤雷
陆俊
王恩准
GAO Junjun;TANG Lei;LU Jun;WANG Enzhun(Materials and Structural Engineering Department,Nanjing Hydraulic Research Institute,Nanjing 210029,China)
出处
《水利水电快报》
2023年第7期39-44,共6页
Express Water Resources & Hydropower Information
关键词
软基水闸
异常变形
沉降监测
原位试验
无损探测
长江口
sluice on soft foundation
abnormal deformation
subsidence monitoring
in-situ test
non-destructive detection
Yangtze Estuary
