摘要
为了探究浆砌片石骨架护坡的应力及应变规律,制作室内拱形骨架护坡模型,埋置元件并监测边坡的应力、变形情况,分析骨架护坡的应力及变形规律,并建立有限元模型作进一步分析验证。分析得到如下结论:(1)应力变化主要集中在前期(0~3月),后期(4~7月)趋于稳定。(2)同排拱架中,拱脚等效应力最大,拱顶最小;拱脚为受力不利点,下排拱架受力情况较上排更严峻。(3)变形方面,同排拱架中,拱脚总位移大于拱顶;不同排拱架中,上排总位移大于下排;同一坡线上,距离坡顶越远,总位移越小;竖向位移变化规律与总位移相近;横向位移随距离的增大而缓慢增大;纵向位移基本无变化。(4)拱形骨架受压后,拱顶承受主要竖向压应力,发生竖向粘结破坏;拱脚与拱柱承受主要横向压应力,发生横向粘结破坏。
In order to explore the stress and strain law of slope protection with mortar flag stone skeleton,the indoor slope protection model with arch skeleton is made,the components are embedded and the stress and deformation of the slope are monitored,the stress and deformation law of the slope protection with skeleton are analyzed,and the finite element model is established for the further analysis and verification.The following conclusions are obtained through the analysis:(1)The stress changes are mainly concentrated in the early stage(0~3 months),and tend to be stable in the later stage(4~7 months).(2)In the same row of arch frames,the equivalent stress of the arch foot is the largest,and that of the vault is the smallest.The arch foot is an unfavorable point of stress,and the stress of the lower row of arch frame is more severe than that of the upper row.(3)In terms of deformation,the total displacement of the arch foot in the same row of arch frame is greater than that of the vault.In different rows of arch frames,the total displacement of the upper row is greater than that of the lower row.On the same slope line,the farther the distance away from the slope top,the smaller the total displacement.The variation law of vertical displacement is similar to that of total displacement.The lateral displacement increases slowly with the increase of distance.The longitudinal displacement is basically unchanged.(4)After the arch skeleton is compressed,the vault bears the main vertical compressive stress,and the vertical bonding failure occurs.The arch foot and the arch column are subjected to the main lateral compressive stress,and the lateral bonding failure occurs.
作者
牛盼
Niu Pan(South of Yuncheng Expressway Branch of Shanxi Transportation Holdings Group Co.,Ltd.,Yuncheng 044000,China)
出处
《北方交通》
2024年第7期51-54,共4页
Northern Communications
关键词
浆砌片石
骨架护坡
室内试验
有限元模型
Mortar flag stone
Slope protection with skeleton
Indoor test
Finite element model
