在分析新疆地区道路常用的砂砾类底基层材料物理和级配特性的基础上,对天然级配和密实级配的砂砾类材料进行了重型击实、抗压回弹模量等试验研究,得出了各指标随砂砾石含量变化的规律,推荐了天然级配及密实级配砂砾类材料设计参数,并通过水稳性试验,得出了新疆砂砾类材料膨胀量随时间的变化规律。 Based on the analysis of the physical and grading characteristics of sand-gravel sub-base materials commonly used in the roads in Xinjiang, the gravel material of natural grading and compaction grading has been subjected to heavy compaction and compressive resilience modulus tests. According to the regularity of each index changing with the content of sand and gravel, the design parameters of natural grading and graded gravel are recommended. Through the water stability test, the variation law of the expansive amount of gravel material in Xinjiang with time is obtained.