工程地质学报2017，Vol.25Issue(4)：1065-1072,8.DOI:10.13544/j.cnki.jeg.2017.04.021
含软弱夹层锚框支护边坡的地震响应研究
SEISMIC RESPONSES OF WEAK INTERLAYERED SLOPE WITH ANCHOR-FRAME REINFORCEMENT USING MODEL SLOPE ON SHAKING TABLE
摘要
Abstract
This paper is based on the prototype slope with weak interlayer inclusion and anchor-frame reinforcement at the MK10+250 of Zhaoyin Expressway.A 1/30 downscale model slope is designed and shaking table tests with 20 loading cases are then conducted.The influences of slope elevation and seismic wave amplitude on the PGA amplification coefficient and the PEP oscillation coefficient are focused in this paper.The PGA amplification coefficients inside and upon the slope always increase with the slope elevation.Due to the isolation effect of weak interlayer and the reinforcement effect of anchor-frame,however,the acceleration response of slope tends to be entirety and no whiplash effect is presented.The PGA amplification coefficients decease linearly (at lower elevation) or exponentially(at upper elevation) with the amplitude of input seismic wave.The PEP oscillation coefficients inside the slop increase linearly with the cover depth,while increase non-linearly with the amplitude of input seismic wave.When excited by the seismic waves with larger amplitude,the additional horizontal pressure towards outside tends to be greater than the counterpart towards inside.The failure characteristic of model slope during shaking table tests is carefully inspected and described.The cracks concentrate in the upper part of slope above the weak interlayer,especially upon the top face of slope.However,no overall instability is presented along the weak interlayer due to the reinforcement effect of anchor-frame.关键词
边坡工程/地震动力响应/振动台试验/软弱夹层/锚框支护Key words
Slope engineering/Seismic response/Shaking table test/Weak interlayer/Anchor-frame reinforcement分类
交通工程引用本文复制引用
吴尚杰,蒋宇静,邓涛,关振长..含软弱夹层锚框支护边坡的地震响应研究[J].工程地质学报,2017,25(4):1065-1072,8.基金项目
国家自然科学基金(51678155),福建省交通运输科技发展项目(201531)资助. （51678155）
