软岩料填筑面板坝三维有限元流变分析

Three-dimensional finite element rheological analysis of rockfill dam filled with soft rock

本文针对软岩料填筑面板坝,开展了大坝三维有限元应力变形数值分析,研究了不考虑坝料流变条件下坝体的基本应力变形特性;运用大坝变形观测资料,反馈分析了坝料流变参数,并对大坝流变进行了计算分析;研究了考虑预沉降时间和坝料流变时,坝体的长期应力变形特性,并对堆石预沉降时间提出了建议;针对软岩筑坝可能出现的问题,提出了提高大坝安全性的建议。

This paper conducts a three-dimensional finite element stress-deformation numerical analysis for the rockfill dam filled with soft rock,studying the basic stress-deformation characteristics of the dam body without considering the rheological conditions of the dam materials.By using dam deformation observation data,the rheological parameters of the dam materials are analyzed and the dam rheology is calculated and analyzed.The long-term stress-deformation characteristics of the dam body are studied considering the pre-settlement time and rheology of the dam materials,and recommendations for the pre-settlement time of the rockfill are proposed.Suggestions for improving the safety of the dam are put forward in response to the possible problems that may arise when using soft rock for dam construction.