冻结黏土开尔文与伯格斯蠕变模型分析  

Analysis of Kelvin and Burgers Creep Model of Frozen Clay

作　　者：吴晓云 刘爽 WU Xiaoyun;LIU Shuang(School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan Anhui 232001, China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001

出　　处：《安徽理工大学学报（自然科学版）》2020年第2期67-72,共6页Journal of Anhui University of Science and Technology:Natural Science

摘　　要：准确描述冻结黏土的蠕变特性有利于人工冻结法的安全施工。对人工冻结黏土进行三个温度下的分级加载蠕变试验,分析温度和加载系数对冻结黏土蠕变规律的影响。以粒子群算法优化模型参数为基础,分别采用广义开尔文模型和伯格斯模型模拟人工冻结黏土蠕变变形试验。模拟结果表明:广义开尔文模型在模拟冻结黏土的稳态蠕变和加速蠕变阶段时,拟合效果不是很好存在较大误差,而柏格斯模型能很好地描述冻结黏土在不同温度和荷载等级下的蠕变曲线,具有很好的适用性。Accurately describing the creep characteristics of frozen clay is conducive to the safely applying the artificial freezing method to the constructing practice.The artificial frozen clay samples were selected to graded loading creep tests at three temperatures,and the effects of temperature and loading coefficient on the creep of frozen clay were analyzed.Based on Particle Swarm Algorithm Optimization model parameters,the generalized Kelvin model and Burgers model were used to simulate the creep of artificial frozen clay.The simulation results show that the generalized Kelvin model does not fit well during secondary stage and tertiary stage of frozen clay,and the Burgers model can well simulate the creep curves of frozen clay under different temperatures and load levels and has good applicability.

关 键 词：人工冻土 蠕变模型 开尔文模型 伯格斯模型 

分 类 号：P314.5[天文地球—固体地球物理学]