市政技术2024，Vol.42Issue(6)：46-51,6.DOI:10.19922/j.1009-7767.2024.06.046
考虑施工正向扰动的土体本构建模研究
Study on Soil Constitutive Modeling by Forward Construction Disturbance
摘要
Abstract
When soft soil layers such as soft clay,silt,and water-rich sand layers are used as a foundation or roadbed,it is necessary to construct reinforcement.Soil strength is increased by cement slurry,solidified cementitious material mixing or grouting treatment.This construction disturbance process is a positive favorable disturbance.Based on the Desai disturbed state theory,the intact soil is described by the modified Cambridge model,dense soil is described by linear elastic one.The constitutive model is established which consider the positive construction disturbance effect to give the calibration method of the corresponding model parameters.Based on development platform of ABAQUS,the new constitutive model is developed again.The numerical simulation of triaxial drained test are carried out.Accord-ing to the comparison between the experimental and calculated data,the new constitutive model is effective and fea-sible.Therefore,a simple and practical modeling method to describe the positive disturbance of soil is provided based on the Desai perturbation state theory.关键词
软弱土层/施工正向扰动/本构模型/Desai扰动状态理论/三轴试验/二次开发Key words
soft soil layer/forward construction disturbance/constitutive model/Desai disturbed state theory/tri-axial test/secondary development分类
土木建筑引用本文复制引用
何敏,耿海东,范立鹏,王艳芳..考虑施工正向扰动的土体本构建模研究[J].市政技术,2024,42(6):46-51,6.基金项目
国家自然科学基金青年科学基金项目(51908278) （51908278）
