摘要
为充分利用石质弃渣,填石路堤已经成为山区高等级公路较普遍的路堤形式。汶川地震以后,我国已处于地震活跃期,因此在高烈度区内修建高速公路,进行地震作用下稳定性研究的意义是显而易见的。小型振动台试验虽然受承载能力和台面尺寸的限制有诸多弊端,但所需经费少,可进行重复实验,其实验结果对工程实践有一定的借鉴作用,更是大型振动台试验积累经验所不可缺少的。作者对研究尚不成熟的填石路堤进行小型振动台试验,研究其在地震作用下的稳定性情况。涉及的雅泸高速公路填石路堤工程位于水库水位变动带内,实验发现水在地震过程中起着重要的作用。在无水条件下,地震导致的边坡破坏最先发生在边坡内侧,随着振动的持续,边坡外侧也将发展成破坏区;在水位上升后,地震导致的边坡破坏最先发生在边坡外侧,由振动产生的水浪对边坡的冲刷、淘蚀作用非常强烈。
Rock-filled embankment has become a general type of road embankment so that these rock tunnel spoil can be used.It is obviously necessary to carry on a study of highway embankment stability in earthquake prone areas,because it is the new period of seismic activity since Wenchuang earthquake in China.The experiment of small-sized shaking table has some drawbacks because of its size and load-bearing capacity,but it is not expensive and can be repeated.Its outcome is the premise conditions of large-size shaking table and referential experience of engineering practice.The paper presented a small-sized shaking table experiment of rock-filled embankment and the purpose of this experiment is attention to stability in seism.The rock-filled embankment located in stage fluctuation zone of reservoir.The experiment confirmed that water was a critical factor during the highway embankment failure.The inside embankment slope is failure at first before the water level is raised and the outside slope will be failure with the development of shaking.However,the outside slope is failure at first in the condition of high water level.There are strong scouring and undercutting effects during shaking.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2011年第4期1092-1097,共6页
Journal of Jilin University：Earth Science Edition
基金
地质灾害防治与地质环境保护国家重点实验室开放基金项目(GZ2009-21)
国家博士后科学基金项目(20070411147)
关键词
填石路堤
地震
振动台
水库
rock-filled embankment
seism
shaking table
reservoirs
