东庄拱坝基础加固措施效果分析  

Analysis of the Effect of Strengthening Measures for Dongzhuang Arch Dam Foundation

作　　者：杨军义 邢建营 聂章博 王惠芹 YANG Junyi;XING Jianying;NIE Zhangbo;WANG Huiqin(Yellow River Engineering Consulting Co.,Ltd.,Zhengzhou 450003,China)

机构地区：[1]黄河勘测规划设计研究院有限公司,河南郑州450003

出　　处：《人民黄河》2024年第3期156-160,共5页Yellow River

基　　金：中国博士后科学基金面上项目(2022M721299)。

摘　　要：拱坝基础加固是保证坝肩稳定和拱坝安全的重要工程措施,以东庄拱坝坝基加固措施为研究对象,系统模拟坝肩岩体中断层、夹泥裂隙、宽大裂隙和相应的加固措施,采用弹塑性本构对其坝基加固效果进行了有限元分析。计算结果表明:基础加固措施对坝体位移和应力的最大值影响很小,但在一定程度上使坝体以及建基面的屈服区减小,改善了坝体受力;基础加固措施对拱坝坝体的塑性区影响不大,但是基础加固后建基面屈服区明显减小,基础加固措施明显改善了坝基的受力状态,基础加固措施对于断层f5和夹泥裂隙Rnj3的屈服区体积影响相对较小,对于宽大裂隙L22的屈服区体积影响较为显著。东庄拱坝基础加固措施改善了坝体和坝基受力、提高了坝基的稳定性。The strengthening of arch dam foundation is an important engineering measure to ensure the stability of dam abutment and the safe⁃ty of arch dams.This paper took the reinforcement measures for the foundation of Dongzhuang arch dam as the research object,systematically simulated the discontinuity layer,mud fissures,wide joints and corresponding reinforcement measures of the dam abutment rock mass.The fi⁃nite element analysis was conducted on the reinforcement effect of the dam foundation using elastic-plastic constitutive law.The calculation results indicate that the foundation reinforcement measures have little effect on the maximum displacement and stress of the dam body,but to some extent,they reduce the yield zone of the dam body and the foundation surface,improving the stress on the dam body.Through overload calculation and analysis,it is found that the foundation reinforcement measures have little effect on the plastic zone of the arch dam body,but the yield zone of the foundation surface is significantly reduced after the foundation reinforcement.The foundation reinforcement measures have a relatively smaller impact on the yield zone volume of fault f5 and muddy fissure Rnj3,but a significant impact on the yield zone vol⁃ume of large fissure L22.In summary,the foundation reinforcement measures taken for Dongzhuang arch dam have improved the stress on the dam body and foundation,and improved the stability of the dam foundation.

关 键 词：混凝土拱坝 基础加固 弹塑性本构 东庄拱坝 

分 类 号：TV642.4[水利工程—水利水电工程]