地震作用下磷石膏坝动力响应与稳定性分析

大坝与安全 ›› 2025 ›› Issue (5): 50-.

地震作用下磷石膏坝动力响应与稳定性分析

刘园春¹ ，于忠锋¹ ，陈念辉²

1.长沙有色冶金设计研究院有限公司，湖南长沙，410011；2.中国电建集团华东勘测设计研究院有限公司，浙江杭州，311122

收稿日期:2024-10-30 出版日期:2025-10-30 发布日期:2026-01-31
作者简介:刘园春（1984—），男，安徽安庆人，高级工程师，主要从事尾矿库设计与管理工作。

Analysis of dynamic response and stability of phosphogypsum dam under earthquake

LIU Yuanchun, YU Zhongfeng and CHEN Nianhui

CINF Engineering Corporation Limited

Received:2024-10-30 Online:2025-10-30 Published:2026-01-31

摘要/Abstract

摘要：

采用时程分析法、有限元极限平衡法、滑动体变形分析法等，以云南省某高堆磷石膏库坝体为研究对象，通过分析静力荷载和动力荷载两种工况下的坝体变化情况，研究强震作用下磷石膏坝动力响应、永久变形及稳定机制，探讨了磷石膏坝稳定性的影响因素，研究了地震作用下磷石膏坝安全系数的时程变化规律。结果表明，震前坝体竖直、水平、剪切、总应力分布合理，地震过程中磷石膏坝瞬时安全系数出现波动降低的趋势，未达到“鞭鞘效应”所导致的极端放大现象，表明该高堆磷石膏库的抗震能力满足相关设防标准。在评估整体安全性时，应综合考虑坝体不同区域在静态和动态条件下的表现，关注超标准地震对坝顶加速度的潜在影响，以确保磷石膏库整体安全性。本研究为提高磷石膏坝的安全性和稳定性提供了理论依据，并为类似工程的管理实践提供了技术支撑。

关键词:

有限元极限平衡法, 地震, 磷石膏坝, 稳定性

Abstract:

Using methods such as time history analysis, finite element limit equilibrium method, and sliding body deformation analysis, focusing on the phosphogypsum dam of a high-stack tailings storage facility in Yunnan province, by analyzing the dam′ s changes under static and dynamic loading conditions, this study investigates the dynamic response, permanent deformation and stability mechanisms of the phosphogypsum dam under strong earthquakes. As well, the factors affecting the stability and the temporal variation of the safety factor of phosphogypsum dam under seismic loading are studied. The results indicate that the distributions of vertical stress, horizontal stress, shear stress and the total stress in the dam before earthquake are reasonable. During earthquake, the instantaneous safety factor of the phosphogypsum dam exhibits a characteristic of fluctuating reduction but does not reach the extreme amplification caused by whiplash effect, suggesting that the seismic performance of the high- stack phosphogypsum dam meets the corresponding seismic design requirements. In evaluation of the overall safety of the phosphogypsum dam, it is necessary to consider the performance of different zones of the dam under both static and dynamic conditions, as well as the potential impact of beyond design basis earthquakes on the acceleration of dam crest, to ensure the overall safety of the phosphogypsum dam. This study provides a theoretical basis for enhancing safety and stability of phosphogypsum dams and offers technical support for management of similar projects.

Key words:

finite element limit equilibrium method, earthquake, phosphogypsum dam, stability

中图分类号:

TV642

刘园春 , 于忠锋 , 陈念辉.

地震作用下磷石膏坝动力响应与稳定性分析

[J]. 大坝与安全, 2025, 0(5): 50-.

LIU Yuanchun, YU Zhongfeng and CHEN Nianhui.

Analysis of dynamic response and stability of phosphogypsum dam under earthquake

[J]. Dam & Safety, 2025, 0(5): 50-.

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