中国地质灾害与防治学报2025，Vol.36Issue(2)：78-86,9.DOI:10.16031/j.cnki.issn.1003-8035.202412025
极端降雨条件下土工合成材料加筋土桥台稳定性分析
Stability analysis of geosynthetic-reinforced soil bridge abutments under extreme rainfall conditions
摘要
Abstract
Geosynthetic-reinforced soil(GRS)abutments have demonstrated significant potential in road and transportation engineering due to their cost-effectiveness,ease of construction,and eco-friendly characteristics.However,the increasing frequency of extreme rainfall events in recent years has significantly impacted on the deformation and stability of these structures.This study systematically evaluated the performance of GRS abutments under traffic loads and extreme rainfall conditions through model tests and numerical analysis.The findings indicate that the numerical model developed with the DBLEAVES-X program can accurately simulates the mechanical response of GRS abutments under conditions of rainfall infiltration,confirming its reliability in the analysis of unsaturated soil mechanics.Parameter analysis reveals that rainfall intensity and the permeability coefficient of the backfill significantly influence the abutment's resistance to rainfall.Using high-permeability backfill with a permeability coefficient of 1.0×10-2 cm/s can significantly enhance the abutment's resistance to rainfall,maintaining stability even under extreme rainfall conditions of 200 mm/h.In contrast,a permeability coefficient of 1.0×10-3 cm/s or 1.0×10-4 cm/s may lead to rapid accumulation of pore water pressure,causing soil swelling deformation and substantially increasing the risk of deformation and instability of the abutment.Therefore,it is advisable in practical engineering design to prioritize high-permeability backfill materials,optimize drainage system designs,and implement specific protective measures to enhance the long-term stability and safety of the GRS abutments under complex environmental conditions.关键词
土工合成材料加筋土桥台/极端降雨/交通荷载/渗透系数/稳定性分析Key words
GRS abutments/extreme rainfall/traffic load/permeability coefficient/stability analysis分类
地质学引用本文复制引用
黄强强,任非凡..极端降雨条件下土工合成材料加筋土桥台稳定性分析[J].中国地质灾害与防治学报,2025,36(2):78-86,9.基金项目
上海浦江人才计划项目(23PJD101) （23PJD101）
国家自然科学基金项目(41877224) （41877224）
中央高校基本科研业务费项目 （）
