【摘要】 结合镇江城市道路路基处治项目,进行了固化粉煤灰的动三轴试验。分析了固化粉煤灰在重复荷载作用下的永久变形及动力特性,研究固化粉煤灰弹性应变、累积塑性应变、临界动应力和动回弹模量变化规律,论证了固化粉煤灰作为城市道路路基填料的可行性。结果表明:动应力是影响固化粉煤灰的动回弹模量大小的主要原因,其临界动应力值在90~100 kPa之间,动态特性完全满足城市道路路基的设计要求。研究结果对类似工程研究具有借鉴意义。更多还原

【Abstract】 Combined with the research project of solidified fly ash treated Zhenjiang urban roadbed,the dynamic triaxial test is made on solidified fly ash.The permanent deformation and dynamic performance of solidified fly ash under repeated load is analyzed.The variation law of elastic strain,cumulative plastic strain,critical dynamic stress,and dynamic elastic modulus of solidified fly ash are studied.It can be concluded that the dynamic performance of solidified fly ash meets the design requirement for subgrade fillings of urban road.The result shows that the dynamic stress is the main reason which affects the magnitude of the dynamic elastic modulus of solidified fly ash,and the critical dynamic stress value is between 90 kPa and 100 kPa,and the dynamic performance meets with the design demand of subgrade fillings of urban road,which may be used for reference for similar projects.更多还原