%0 Journal Article
%A QIU  Song-nan
%A LI  Xiao-dong
%A ZHOU  Peng-zhan
%T Strength Degradation Mechanism and Predictive Model of Piping Soils under Seepage Failure
%D 2025
%R 10.11988/ckyyb.20230931
%J Journal of Changjiang River Scientific Research Institute
%P 186-193
%V 42
%N 1
%X <p id="p00015">Due to its concealed development process and severe consequences, seepage failure poses a significant threat to hydraulic engineering projects. To investigate the strength degradation characteristics of piping soils before and after seepage failure, an internal erosion stress path triaxial apparatus was developed for geotechnical testing. Seepage failure tests and triaxial degradation tests were conducted using this apparatus, considering the influences of three critical factors: fine particle content, consolidation pressure, and hydraulic gradient. Results revealed that: 1)These three factors significantly impact the seepage failure process, thereby affecting the strength degradation behavior of piping soils. Specifically, higher fine particle content and consolidation pressure tend to mitigate the degree of degradation, while a higher hydraulic gradient significantly amplifies it. 2)A hyperbolic curve function was used to model the degradation degree of piping soils, and a seepage failure strength degradation model was established through numerical simulation software. These findings provide valuable insights for the structural integrity analysis of hydraulic constructions and the prediction of seepage-related disasters.</p>
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20230931