岩土工程学报2024，Vol.46Issue(12)：2521-2528,8.DOI:10.11779/CJGE20230824
筑坝土石料填筑干密度数字特征的动态优化方法研究
Dynamic optimization method for statistics of dry density of earth-rockfill materials
摘要
Abstract
A method for optimizing the compaction quality control index of dams is proposed.Using the collected dry density of field soil samples,the statistics(mean,standard deviation and correlation distance)are determined.According to the correlation between the deformation parameters and the dry density of soils,the random fields of material parameters are established,and the random finite element analysis is carried out to predict the structural responses and safety of dams.Based on the quadratic polynomial,the response surface equation for the statistics of dry density of soils and dam response is established,and the exceeding probability expression is derived.In order to improve the dam safety,the statistics of dry density of soils are further optimized,which provides guidance for the adjustment of construction parameters.Through a practical project,the influence laws of material uncertainty are studied at different filling stages.The uncertain deformation response analysis tends to be stable.The statistics of core wall materials have a great effect on the maximum settlement and deformation gradient.By adjusting the exceeding probability,the statistics of dry density of soils in each partition can be obtained,so as to guide the dam construction and improve the control level of dam deformation as well as the safety evaluation accuracy.关键词
心墙堆石坝/最大沉降/最大倾度/干密度/随机场Key words
core wall rockfill dam/maximum settlement/maximum deformation gradient/dry density/random field分类
建筑与水利引用本文复制引用
贾宇峰,冯文泉,迟世春..筑坝土石料填筑干密度数字特征的动态优化方法研究[J].岩土工程学报,2024,46(12):2521-2528,8.基金项目
国家自然科学基金面上项目(52379116) （52379116）
国家重点研发计划(2016YFB0201001) （2016YFB0201001）
