人民长江2025，Vol.56Issue(3)：164-171,8.DOI:10.16232/j.cnki.1001-4179.2025.03.022
压坡体对土石坝抗震性能的影响及地震安全性评价
Influence of slope-compaction zone on rockfill dam seismic performance and earthquake safety evaluation
摘要
Abstract
Numerous pumped storage power stations are currently in the planning and construction phases.Owing to environ-mental protection requirements,substantial waste slag accumulates on dam slopes of rockfill dams,forming slope-compaction zones as referred in below context.The absence of specific standards for this zone leads to the application of general dam body standards for assessing seismic safety,often resulting in over-design and economic inefficiency,particularly in regions prone to severe earthquakes.Therefore,it is of considerable engineering significance to investigate influence mechanisms and evaluation methodologies of the slope-compaction zone under strong seismic conditions.Considering dam-foundation interactions,analyses such as elastoplastic dynamic response,equivalent-linear analysis,and time history stability assessment are conducted for a rock-fill dam located in an area susceptible to extremely strong earthquakes.The impact of the slope-compaction zone on the integrity of the dam is investigated,and a method for evaluating its seismic safety is proposed.Findings reveal that the normal pressure ex-erted by the slope-compaction zone on the dam's slope significantly exceeds the shear forces along the slope,thereby aiding in reducing seismic deformation of the dam structure.Moreover,the porosity of the slope-compaction zone does not influence seis-mic deformation,suggesting that enhancements to construction standards in this zone are unnecessary.The minimal safety factor for the dynamic stability of the slope-compaction zone only refers to a superficial,non-threatening sliding surface that does not threaten the dam's safety.It is recommended that either the overall deformation of the dam or the stability(safety factor and slip deformation)of critical sliding surfaces through the dam body be used to assess the seismic safety of the slope-compaction zone.The research provides support for the seismic design and safety evaluation of rockfill dams with a slope-compaction zone in areas prone to strong earthquakes.关键词
土石坝/压坡体/地震响应/地震安全性评价/抽水蓄能电站Key words
rockfill dam/slope-compaction zone/seismic response/earthquake safety evaluation/pumped storage station分类
建筑与水利引用本文复制引用
邹德高,屈永倩,高东红,杨智凯,刘京茂,王辉..压坡体对土石坝抗震性能的影响及地震安全性评价[J].人民长江,2025,56(3):164-171,8.基金项目
国家自然科学基金项目(52192674,52109151) （52192674,52109151）
水利部重大科技项目(SKS-2022101) （SKS-2022101）
西藏自治区重点研发计划项目(XZ202201ZY0017G) （XZ202201ZY0017G）
