中外公路2025，Vol.45Issue(6)：85-93,9.DOI:10.14048/j.issn.1671-2579.2025.06.010
循环荷载下固化土路用性能及遇水软化特性
Road Performance and Water-Softening Characteristics of Stabilized Soil under Cyclic Loading
摘要
Abstract
To effectively deal with waste soil and reduce environmental pollution,this paper took a road engineering project in Shaoxing as the research object and conducted a cyclic triaxial incremental loading test on the undisturbed lime soil under undrained conditions to study the effects of confining pressure,cyclic stress ratio,and water immersion on its performance.The results show that when the cyclic stress ratio increases from 1 to 4,the cumulative strain and resilient strain increase rapidly in the initial loading stage,showing a trend of"stepwise"increase.The cumulative strain produced at a cyclic stress ratio of 2 is about twice that at the cyclic stress ratio of 1.The resilient modulus has a slight increase first and then quickly tends to stabilize,which indicates that the cyclic stress ratio has a limited effect on it.The influence of confining pressure on the axial cumulative strain is little.The axial cumulative strain varies slightly with the number of cycles,rapidly increasing in the initial stage and then stabilizing,which reflects the good plastic deformation resistance of lime soil.Under the same cyclic stress ratio,increasing the confining pressure significantly increases the resilient modulus.For example,the resilient modulus increases significantly at the cyclic stress ratio of 1 when the confining pressure is increased from 20 kPa to 40 kPa.The influence of confining pressure on the resilient modulus is about 2.89 times that of the cyclic stress ratio.After water immersion for 24 hours,the total and cumulative strains in the axial direction increase significantly,and the growth is more prominent at 20 kPa confining pressure.The total strain first increases and then decreases with confining pressure,and the resilient modulus after water immersion is more influenced by the cyclic stress ratio.Based on this,a prediction model is proposed for the resilient modulus of the undisturbed lime-stabilized soil before and after water immersion,providing a reference for the solidification of soft soil foundations under complex traffic loads.关键词
石灰固化土/围压/循环应力比/逐级加载试验/累积变形/回弹模量Key words
lime-stabilized soil/confining pressure/cyclic stress ratio/incremental loading test/cumulative deformation/resilient modulus分类
交通工程引用本文复制引用
HU Hong,LI Zongheng,FENG Yong,CAO Zhigang,LIU Yaoxing..循环荷载下固化土路用性能及遇水软化特性[J].中外公路,2025,45(6):85-93,9.基金项目
国家自然科学基金资助项目(编号:51978611) （编号:51978611）
浙江省杰出青年科学基金资助项目(编号:LR21E080004) （编号:LR21E080004）
浙江大学-浙江交工协同创新联合研究中心资助项目(编号:ZDJG2021011) （编号:ZDJG2021011）
