粉煤灰坝模型试验研究  

TESTS ON DYNAMIC BEHAVIOR OF FLY ASH DAM

作　　者：陈建斌[1] 周立运[2] 

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学重点实验室,武汉430071 [2]武汉大学土木与建筑工程学院,武汉430072

出　　处：《岩石力学与工程学报》2004年第z1期4351-4355,共5页Chinese Journal of Rock Mechanics and Engineering

摘　　要：以湖南省耒阳电厂粉煤灰坝的加高加固工程为研究背景,采用大型液压伺服式振动台作为试验手段,分别对高程为170,180,230 m的灰坝模型进行了动力特性试验研究,并进行了计算验证。同时,对采用3种不同灰渣拌合料加高的180 m高程灰坝模型进行了动力特性评价并认为其对灰坝的整体动力特性没有太大的影响。试验结果表明,灰坝的自振频率是随着激振加速度的增大和坝体的加高而降低的;坝顶加速度放大倍率也是随激振加速度的增大而降低的;两者在有干滩工况下普遍大于无干滩工况。Based on the case of the fly ash dam of Leiyang Power Station in Hunan Province,the dynamic behavior of the fly ash dam at the elevations of 170,180 or 230 m with submerged beach or non-submerged beach is studied by models on the large-scale vibration table.The evaluation of earthquake-resistant behavior is also made on the models of 180 m fly ash dams heightened by three mixtures,and it is shown that the mixture type has little influence on the earthquake-resistant behavior of the dam.The tests show that the natural frequency of dam and the acceleration amplification ratio at the top of dam decrease with the increase of excitation acceleration and dam height and are lower under the condition of submerged beach than those of non-submerged beach.

关 键 词：土力学 粉煤灰坝 模型试验 振动台 动力特性 

分 类 号：TU435[建筑科学—岩土工程] TU411.93[建筑科学—土工工程] X773[环境科学与工程—环境工程]