骨料参数对胶凝砂砾石宏观力学行为的影响研究  

Study on the Influence of Aggregate Parameters on Macroscopic Mechanical Behavior of Cemented Sand and Gravel

作　　者：张亚楠 杨孙浩 朱轩毅 李凡 ZHANG Ya-nan;YANG Sun-hao;ZHU Xuan-yi;LI Fan(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学水利水电学院,江苏南京210098

出　　处：《水电能源科学》2025年第3期93-95,16,共4页Water Resources and Power

摘　　要：为探究骨料参数对胶凝砂砾石材料宏观力学行为的影响,利用改进等效化理论模型进行参数关系研究,并通过有限元方法模拟室内单轴压缩试验,结合遗传算法反演分析确定等效化理论模型所需的细观组分参数;在此基础上,探究骨料参数与胶凝砂砾石宏观力学性能之间的关系。研究发现,骨料占有率较优范围为35%~55%,超过55%时骨料占有率达到体积阈值,且有限元模拟结果不再发生改变;砂率增加,骨料占有率降低,峰值应力也随之降低;砂率增大,应力—应变曲线切线斜率减小,即弹性模量变小,且二者存在一定的线性关系,该关系可为胶凝砂砾石配合比设计提供依据。In order to explore the influence of aggregate parameters on the macroscopic mechanical behavior of cemented sand and gravel materials,this paper uses an improved equivalence theoretical model to study the parameter relationship,and simulates the indoor uniaxial compression test by finite element method with genetic algorithm inversion analysis to determine the mesoscopic component parameters required by the equivalence theoretical model.On this basis,the relationship between aggregate parameters and macroscopic mechanical properties of cemented sand and gravel is explored.The results show that the optimal range of aggregate occupancy is 35%-55%;When the aggregate occupancy exceeds 55%,it reaches the volume threshold,and the finite element simulation results do not change;With the increase of sand rate,the aggregate occupancy decreases,and the peak stress also decreases;With the increase of sand rate,the tangent slope of stress-strain curve decreases,that is,the elastic modulus decreases,and there is a certain linear relationship between the two,which can provide a basis for the mix ratio design of cementitious sand gravel.

关 键 词：胶凝砂砾石 等效化理论模型 有限元模型 骨料参数 宏观力学行为 

分 类 号：TV42[水利工程—水工结构工程]