灰坝固化粉煤灰坝体渗流稳定研究  

STUDY ON SEEPAGE STABILITY OF SOLIDIFIED FLY ASH DAM

作　　者：王学雷 喻林[1] 高佳鑫 WANG Xue-lei;YU Lin;GAO Jia-xin(Institute of Mechanics and Materials,Hohai University,210098,Nanjing,China;Shanghai Jianke Engineering Consulting Co.Ltd.,200032,Shanghai,China)

机构地区：[1]河海大学力学与材料学院,南京210098 [2]上海建科工程咨询有限公司,上海200032

出　　处：《建筑技术》2021年第11期1362-1365,共4页Architecture Technology

摘　　要：结合某电厂灰坝项目,从筑坝材料和有限元计算两个方面进行研究,并对固化粉煤灰进行配合比优化设计。通过数值仿真软件,研究降雨条件下灰坝的渗流稳定性。得出以下主要结论:现状灰坝安全系数比采用固化粉煤灰筑坝的灰坝低,可能存在溃坝等安全隐患;灰坝的薄弱点在于渗透系数较大的部位,降雨条件下随着雨水入渗,这些部位位移量较大;采用固化粉煤灰的灰坝,由于抗压、抗剪和抗渗性能得到很大提升,雨水入渗较少,坝体内部渗流相对稳定,整体位移量远小于现状灰坝的位移量。Based on an ash dam project in a power plant,dam building materials and finite element calculation were studied,and the mixing proportion of solidified fly ash was optimized.The numerical simulation software was used to study the seepage stability of the ash dam under rainfall conditions.It was concluded that the safety coefficient of ash dams is lower than that of the dam constructed with solidified fly ash,and there may be potential safety hazards such as dam break.The weakness of fly ash dam lies in the parts with large seepage coefficient,and the displacement of these parts is large with the infiltration of rain.Compression resistance,shear resistance and impermeability of the fly ash dam with solidified fly ash have been greatly improved,the rainwater infiltration is less,the internal seepage in the dam body is relatively stable,and the overall displacement is far less than the displacement of the existing ash dam.

关 键 词：灰坝 固化粉煤灰 渗流 稳定校核 数值仿真 

分 类 号：TU50[建筑科学—建筑技术科学]