【摘要】 依托南昌青云谱机场扩建项目,现场模拟机场跑道试验区,进行压实度试验、室外CBR试验、室内CBR试验以及道基反应模量试验,研究了雨旱季交替雨水反复浸泡干湿循环条件下,中粗砂作为道基材料,其力学性能变化规律。得出了道基材料中粗砂在干湿循环条件下,其力学性能与干湿循环次数的正反比例关系,及道基承载力随着干湿循环次数的增加呈现先陡降后趋于稳定的变化规律。更多还原

【Abstract】 Relying on the expansion project of Qingyunpu airport in Nanchang,the field simulation of airport runway test area is carried out to carry out compaction test,outdoor CBR test,indoor CBR test and subgrade reaction modulus test. Studying the mechanical properties of medium coarse sand as road base material under the condition of alternate rain and dry season. The positive and negative proportional relationship between the mechanical properties of coarse sand and the number of drying and wetting cycle is obtained,and the bearing capacity of subgrade shows the change law of steep drop at first and then tends to be stable with the increase of drying and wetting cycle.更多还原