含水土质边坡的爆破振动响应及破坏模式研究Study on Vibration Response and Failure Mode of Soil Slope with Groundwater
邹锐,王玉杰,任少峰,陶明
摘要(Abstract)：
公路边坡施工期间在频繁遭受爆破振动作用影响的同时,还会经常承受降雨和水位升降变化的影响。为探讨爆破振动荷载与地下水协同作用下土质路基边坡稳定性,建立了土质边坡的有限元模型,研究了爆破振动荷载和地下水协同作用下土质路基边坡的振动响应规律,并建立了几何相似系数为1∶10的试验模型,研究了存在地下水和不存在地下水时土质路基边坡在爆破振动荷载下的响应特征,进一步探讨了土质路基边坡在爆破振动作用下的渐进性破坏机理。研究发现:随着地下水位的升高,土质路基边坡不同位置的振动加速度减小;随着地下水位的上升,土质路基边坡不同位置的振动位移逐渐增加,而振动速度减小;在相同水位和爆破振动条件下,沿着边坡高度方向振动位移和振动速度都是减小的。无地下水时,起始于坡脚的震源,坡顶会出现明显的圆弧形滑移破坏,坡脚和坡顶破坏最为严重;有地下水时,坡脚在爆破振动波的作用下发生了拉裂破坏,而坡顶没有出现破坏。
关键词(KeyWords)： 土质边坡;爆破振动荷载;地下水;振动响应规律;破坏模式
基金项目(Foundation): 国家自然科学基金项目资助(No.11772357)
作者(Author): 邹锐,王玉杰,任少峰,陶明
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