岩土工程学报2026，Vol.48Issue(z2)：38-42,5.DOI:10.11779/CJGE2026S20034
交通荷载作用下硅藻土的累积应变预测模型
Prediction model for cumulative strain of diatomite under traffic loads
摘要
Abstract
Diatomite undergoes significant cumulative deformation under traffic loading,leading to engineering issues such as subgrade settlement,while research on its deformation characteristics under such loading remains limited.To explore the cumulative deformation rules of diatomite under traffic louds,a series of tests are carried out with different cyclic stress ratios,diatom contents,effective confining pressures,vibration frequencies and torsional shear stress ratios.The results show that the deformation resistance of diatomite is enhanced with the increase of diatom content;the rise in initial effective confining pressure and loading frequency aggravates strain accumulation,and the rotation of principal stress axes has a deformation-promoting effect.A deformation prediction model for diatomite is proposed,which embeds correction functions of diatom content and torsional shear stress ratio into the HCA model and optimizes the model parameters via the improved cuckoo search algorithm(ICS).The predicted values of the model are in good agreement with the overall trend of test results,which can effectively capture the cumulative deformation behaviors of diatomite.This research provides a scientific basis for the design and settlement prediction of transportation infrastructure in diatomite areas.关键词
硅藻土/交通荷载/累积变形/HCA模型Key words
diatomite/traffic loads/cumulative deformation/HCA model分类
建筑与水利引用本文复制引用
孙苗苗,刘徐,颜荣涛,胡成宝,吴熙,刘嘉英..交通荷载作用下硅藻土的累积应变预测模型[J].岩土工程学报,2026,48(z2):38-42,5.基金项目
浙江省自然科学基金项目(LGEY25E090010) （LGEY25E090010）
