季金铭,高文学,曹晓立,叶明班,张登杰

• 1:北京工业大学建筑工程学院

摘要(Abstract)：

为研究爆破荷载作用下高陡边坡的动力稳定性问题,依托国家高山滑雪中心(延庆赛区)索道平台处边坡爆破工程,在现场监测的基础上结合数值模拟对爆破破岩过程中边坡的速度场、应力场和位移场进行了研究。研究结果表明:对于边坡坡顶平面,随着爆心距的增大,质点振速峰值呈现衰减趋势,一定范围内V_(垂向)>V_(径向)>V_(切向),质点垂向振速主频主要集中在0～50 Hz范围;对边坡坡面,随着爆心距增大,质点振速、位移总体呈现衰减趋势,台阶处受"鞭梢效应"影响,产生放大效应,并且具有方向性;台阶处应力峰值与振速峰值并非在同一位置出现,岩体边坡的岩体边坡的稳定性应综合考虑振速峰值大小及应力是否超过岩体的抗拉强度来判断。

关键词(KeyWords)： 高陡边坡;动力响应;振动监测;数值模拟;鞭梢效应

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划“科技冬奥”(2018YFF0300205)

作者(Author): 季金铭,高文学,曹晓立,叶明班,张登杰

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