岩土力学2025，Vol.46Issue(5)：1511-1520,10.DOI:10.16285/j.rsm.2024.0885
基于荷载-干湿循环耦合试验的三峡库区石龙门滑坡滑带土强度特性研究
Strength characteristics of slip zone soil of Shilongmen landslide in Three Gorges Reservoir Area under coupled drying-wetting cycles with loading
摘要
Abstract
Slip zone soil,a crucial factor in landslide stability,is essential for understanding the initiation mechanisms and stability assessment of reservoir bank landslides.This study investigates the strength characteristics of slop zone soil under drying-wetting(D-W)cycles to inform research on reservoir bank landslides.As an illustration of this phenomenon,the Shilongmen landslide in the Three Gorges Reservoir serves as a case study.Taking into account the impact of both D-W cycles and the overlying load on the soil,the strength characteristics of the slip zone soil are investigated.Experimental results show that slip zone soil exhibits strain softening during D-W cycles,becoming more pronounced with more cycles.D-W cycles cause deterioration in shear strength and cohesion of slip zone soil,especially in the first four cycles,while the internal friction angle remains largely unchanged.The compaction effect of the overlying load mitigates the deterioration caused by D-W cycles.The findings reveal the weakening pattern of mechanical strength in slip zone soil under combined effects of overlying load and D-W cycles,offering valuable insights for studying mechanical properties of slip zone soil in reservoir bank landslides.关键词
三峡库区/滑带土/上覆荷载/干湿循环/强度Key words
Three Gorges Reservoir/slip zone soil/overlying load/drying-wetting cycles/strength分类
土木建筑引用本文复制引用
孟佳佳,吴益平,晏鄂川,汪洋..基于荷载-干湿循环耦合试验的三峡库区石龙门滑坡滑带土强度特性研究[J].岩土力学,2025,46(5):1511-1520,10.基金项目
国家重点研发计划课题(No.2023YFC3007201) （No.2023YFC3007201）
国家自然科学基金项目(No.41972289).This work was supported by the National Key Research and Development Program of China(2023YFC3007201)and the National Natural Science Foundation of China(41972289). （No.41972289）
