QIN Zipeng, TIAN Yan, GAO Siyuan, ZHOU Jianfen, HE Xiaohui, HE Weizhong, GAO Jingquan. 2024: Stability behavior of the Lanxi ancient flood control levee after reinforcement with upside-down hanging wells and grouting curtain. Journal of Mountain Science, 21(1): 84-99. DOI: 10.1007/s11629-023-8239-7
Citation: QIN Zipeng, TIAN Yan, GAO Siyuan, ZHOU Jianfen, HE Xiaohui, HE Weizhong, GAO Jingquan. 2024: Stability behavior of the Lanxi ancient flood control levee after reinforcement with upside-down hanging wells and grouting curtain. Journal of Mountain Science, 21(1): 84-99. DOI: 10.1007/s11629-023-8239-7

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

  • 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.
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