基于有限元法的心墙砾石土压实特性分析  

Analysis on the Compaction Characteristics of Gravelly Soil of the Core Wall Based on Finite Element Method

作　　者：崔博[1] 王毓杰 王佳俊[1] 余佳[1] CUI Bo;WANG Yujie;WANG Jiajun;YU Jia(State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300350,China)

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300350

出　　处：《水力发电》2020年第12期64-70,共7页Water Power

基　　金：国家自然科学基金雅砻江联合基金资助项目(U18-65204、U1765205);国家自然科学基金资助项目(51779169)。

摘　　要：采用有限元法将凸块碾与砾石土作为耦合体系来研究心墙砾石土的压实特性,为心墙砾石土压实特性研究提供了新的思路。首先利用有限元软件ABAQUS构建"凸块碾-砾石土"三维有限元模型,以模拟心墙砾石土碾压的整个过程;其次通过模拟结果与实测结果对比,证明了该模型的可靠性;最后从砾石土沉降量、竖向应力幅值、密度等方面研究砾石土压实特性并分析砾石土竖向应力幅值的分布特性,为控制心墙砾石土的压实质量提供科学的理论依据。The finite element method is used to study the compaction characteristics of core wall gravel soil by using the bump mill and gravelly soil as the coupling system,which provides a new way of thinking for the compaction characteristics study of core wall gravel soil.Firstly,the finite element software ABAQUS is used to construct a three-dimensional finite element model of"Bumping roller-gravelly soil"to simulate the whole rolling process of core wall gravel soil.Secondly,the reliability of the model is proved by comparing the simulation results with the measured results.Finally the compaction characteristics of gravelly soil is studied from the aspects of gravelly soil settlement,vertical stress amplitude and density,and the distribution characteristics of vertical stress amplitude of gravelly soil is also analyzed,which provides a scientific theoretical basis for controlling the compaction quality of core wall gravel soil.

关 键 词：心墙砾石土 压实特性 数值模拟 ABAQUS 

分 类 号：TV641.41[水利工程—水利水电工程] TV322