摘要
为研究番禺丹山河堤防粉质黏土的力学特性,基于水-热-力耦合方程,采用了COMSOL离散元计算模块开展了土样的多场耦合力学试验模拟,在验证了数值计算结果可靠性的基础上,基于模拟结果开展了土样力学特征探讨。研究表明:不论是温度场或是渗透水压场,均不会改变试样应变发展特征;温度梯次递增,试样承载能力呈先增后减变化,转折点温度为100℃;渗透水压增大,承载能力减弱,在水压超过20kPa后降低更显著。含砂量愈多,试样弹性变形能力降低,而承载能力增强。研究可为水-热-力多场耦合下土壤力学特征及数值计算设计提供参考。
To study the mechanical properties of silty clay in the Danshan River embankment in Panyu,a multi-field coupled simulation was performed using the discrete element module in COMSOL,based on the hydro-thermo-mechanical coupling equation.After validating the reliability of the numerical results,the mechanical characteristics of soil samples were explored.Neither the temperature field nor the osmotic pressure field affects the strain evolution of the samples.As the temperature increases,the load-bearing capacity of the sample first increases and then decreases,with a turning point at 100℃.When the infiltration water pressure increases,the bearing capacity decreases,and this reduction becomes more pronounced when the water pressure exceeds 20 kPa.A higher sand content leads to a decrease in the sample’s elastic deformation ability,while the bearing capacity increases.This paper provides a reference for the mechanical characteristics and numerical design of soil under hydro-thermo-mechanical coupling.
作者
陈旋明
CHEN Xuanming(Guangdong No.3 Water Conservancy and Hydro-electric Engineering Bureau Co.,Ltd.,Dongguan Guangdong,523710,China)
出处
《江西水利科技》
2025年第1期9-14,共6页
Jiangxi Hydraulic Science & Technology
关键词
丹山河
堤防
粉质黏土
力学
水-热-力耦合
Danshan River
Embankment
Silty clay
Mechanics
Hydro-thermo-mechanical coupling
作者简介
陈旋明(1992-),男,大学本科,工程师.
