基于变异粒子群算法的大坝土料流变参数反演--以观音岩混合坝为例  

Back-analysis of creep deformation parameters of Guanyinyan composite dam based on parallel mutation particle swarm optimization

作　　者：贾宇峰[1,2] 朱茂林[2] 迟世春[1,2] 

机构地区：[1]大连理工大学近海与海岸工程国家重点试验室,辽宁大连116024 [2]大连理工大学,建设工程学部工程抗震研究所,辽宁大连116024

出　　处：《人民长江》2017年第14期73-78,共6页Yangtze River

基　　金：国家自然科学基金资助项目(51109027,51179024,51379029);中央高校基本科研业务费资助项目(DUT12LK11)

摘　　要：观音岩水电站混合坝在竣工后发生了较大的流变变形,导致土石坝坝段在蓄水一个月后出现了裂缝。为分析坝体裂缝产生的原因,采用并行变异粒子群算法,根据观音岩混合坝竣工后的坝体沉降观测数据反演了筑坝堆石料和心墙料的流变参数。进一步根据反演参数进行了坝体的三维有限元计算,分析和预测了大坝在蓄水期和运行期的变形特性。结果表明,较大的蓄水期不均匀沉降及较大的坝体流变变形是坝体产生裂缝的主要原因。Biggish creep deformation was found at Guanyinyan composite dam composed of earth dam and concrete dam after construction, which induced cracks in the earth-rockfill dam in a month after initial water impounding. According to the settlement data after construction completion, the creep deformation parameters of the rockfill material and clay soil used in the dam were back-analyzed using a parallel mutation particle swarm optimization. According to the back-analyzed creep deformation parameters, finite element analysis of the dam is carried out, by which the deformation features of the dam in the impounding period and operation period are analyzed and calculated respectively. The results show that the main causes for dam cracks are bigger uneven settlement and creep deformation of the dam.

关 键 词：流变参数 堆石料 心墙料 并行变异粒子群算法 观音岩水电站 

分 类 号：TV698[水利工程—水利水电工程]