水力发电学报2025，Vol.44Issue(8)：31-43,13.DOI:10.11660/slfdxb.20250804
深厚覆盖层高面板坝碎石桩抗震加固效果分析
Seismic analysis of gravel columns-reinforced high CFRD with thick layered alluvial deposit
摘要
Abstract
The seismic design of a high concrete face rockfill dam(CFRD)sitting on thick layered alluvial deposit poses a significant challenge.This study focuses on seismic responses of both its deep alluvial deposit and its structure,using a plasticity constitutive model for large post-liquefaction deformation of sand(CycLiq)and a high-performance GEOSX platform for solid-fluid coupled analysis.The findings reveal the seismic responses are notably stronger in areas adjacent to the banks,where the alluvial deposit is thinner.This underscores the limited reinforcement effect of gravel columns if located on the floor of the valley where alluvial deposit is deep.This study suggests an optimized treatment scheme,emphasizing the reinforcement of alluvial deposit near both banks.Our analysis shows that for these areas,the scheme of adopting a large area replacement ratio of gravel columns can yield a significant improvement on the reinforcement,an 80%decrease in gravel column treating work,and up to 26%reduction of joint deformation.关键词
高面板坝/深厚覆盖层/动力响应/碎石桩/地基处理优化Key words
high CFRD/thick layered alluvial deposit/seismic response/gravel column/optimization of foundation treatment分类
建筑与水利引用本文复制引用
王昭,王睿,王荣鑫,王克,刘超,武明鑫,姚虞,张建民..深厚覆盖层高面板坝碎石桩抗震加固效果分析[J].水力发电学报,2025,44(8):31-43,13.基金项目
国家自然科学基金(52425904 （）
52378349) （）
清华大学自主科研计划资助 （）
