摘要
为探讨贵州花鱼洞大桥黄果树岸坡的长期稳定性,在充分调研、试验的基础上,以蠕变幂函数经验模型描述岩石蠕变试验曲线特征并利用ABAQUS数值模拟方法对其准确性进行对比分析。最后,将该理论运用于工程实例,对工程岸坡的长期稳定性展开研究。结果表明:蠕变幂函数经验模型可较好地描述花鱼洞大桥岸坡岩石的蠕变特征;岸坡位移因蠕变持续增长,且坡顶增幅较坡底大,经半年蠕变变形趋于稳定;岸坡塑性区经历了出现、扩展到趋于稳定的过程,变形破坏呈渐进式发展,未形成塑性贯通区,岸坡能够长期稳定。
In order to explore the long-term stability of the Huangguoshu bank slope of the Huayudong Bridge in Guizhou,based on detailed research and sufficient experiments,the creep power function empirical model is used to describe the characteristics of the rock creep test curve.Based on this,the accuracy of the empirical model is compared and analyzed by using ABAQUS finite element software.Finally,apply this theory to engineering examples to study the long-term stability of engineering bank slopes.The results indicate that the creep power function empirical model can effectively describe the creep characteristics of bank slope rocks.The displacement of the bank slope continues to increase due to creep,and the increase at the top of the slope is greater than that at the bottom.After about half a year of creep deformation,it tends to stabilize.The plastic zone of the bank slope has undergone a process of appearance,expansion,and stabilization,with gradual deformation and failure.A plastic through zone has not been formed,and the bank slope has remained stable for a long time.The research results can provide reference for long-term stability research and engineering practice of slopes.
作者
徐智涵
刘显刚
周靖霖
黄显耀
吴骏
XU Zhihan;LIU Xiangang;ZHOU Jinglin;HUANG Xianyao;WU Jun(Guizhou Guiyang Highway Management Bureau,Guiyang 550001,China;School of traffic engineering,Guizhou Institute of Technology,Guiyang 550003,China)
出处
《四川建材》
2024年第7期161-163,共3页
Sichuan Building Materials
基金
贵州省科学技术厅2022年度基础研究计划(自然科学)项目(黔科合基础-ZK[2022]一般169)
2023年贵州理工学院高层次人才科研启动项目:非均匀应力场深软巷道围岩塑性区解析研究
贵州省公路局科技项目:花鱼洞大桥基础施工对原桥结构影响及控制技术研究(GTGLJ-QTHT-2023-0017)。
关键词
大桥岸坡
长期稳定性
蠕变
数值模拟
bank slope of bridge
long-term stability
creep
numerical simulation
