Stability behavior of the Lanxi ancient flood control levee after reinforcement with upside-down hanging wells and grouting curtain  

作　　者：QIN Zipeng TIAN Yan GAO Siyuan ZHOU Jianfen HE Xiaohui HE Weizhong GAO Jingquan 

机构地区：[1]School of Water Conservancy and Environment Engineering,Zhejiang University of Water Resources and Electric Power,Hangzhou 310018,China [2]Department of Civil Engineering,Imperial College London,London,SW71BF,England [3]Lanxi Water Affairs Bureau,Lanxi 321102,China [4]Zhejiang Water Conservancy Engineering Consulting Co.,Ltd,Hangzhou 310051,China

出　　处：《Journal of Mountain Science》2024年第1期84-99,共16页山地科学学报（英文）

基　　金：the scientific research foundation of Zhejiang Provincial Natural Science Foundation of China (LTGG24E090002);Zhejiang University of Water Resources and Electric Power (xky2022013);Major Science and Technology Plan Project of Zhejiang Provincial Department of Water Resources (RA1904);the water conservancy management department, Zhejiang Design Institute of Water Conservancy and Hydro Electric Power Co., Ltd. and the construction company for their support。

摘　　要：The stability of the ancient flood control levees is mainly influenced by water level fluctuations, groundwater concentration and rainfalls. This paper takes the Lanxi ancient levee as a research object to study the evolution laws of its seepage, displacement and stability before and after reinforcement with the upside-down hanging wells and grouting curtain through numerical simulation methods combined with experiments and observations. The study results indicate that the filled soil is less affected by water level fluctuations and groundwater concentration after reinforcement. A high groundwater level is detrimental to the levee's long-term stability, and the drainage issues need to be fully considered. The deformation of the reinforced levee is effectively controlled since the fill deformation is mainly borne by the upside-down hanging wells. The safety factors of the levee before reinforcement vary significantly with the water level. The minimum value of the safety factors is 0.886 during the water level decreasing period, indicating a very high risk of the instability. While it reached 1.478 after reinforcement, the stability of the ancient levee is improved by a large margin.

关 键 词：Stability analysis Multiple factors Antiseepage reinforcement Upside-down hanging well Grouting curtain Ancient levee 

分 类 号：TV871[水利工程—水利水电工程]