摘要
为研究土石混合料的工程力学性质,采用自行研制的大型击实仪对不同粗颗粒质量分数、级配、击实方法及击实功情况下的土石混合料进行系统的击实试验,并对不同粗颗粒质量分数的土石混合料开展了无侧限抗压强度、CBR(加州承载比)及回弹模量试验。试验结果表明:土石混合料的级配在泰勒理想级配范围内,其压实性能最好,且压实过程中,击实功不易太大,否则易使土石混合料的级配退化;在实际工程中,最好选用大型击实法来确定土石混合料的最大干密度,否则会降低压实标准;土石混合料的力学性能较好,且浸水后膨胀量小于一般细粒土的膨胀量。
In order to study the engineering mechanics property of the earth-rock mixtures, this paper made a lot of tests on the earth-rock mixtures in the condition of different coarse aggregate contents, grading, compactive works and compacting methods with the large-scale compaction device, and the unconfined compressive strength test, CBR test, resilience modulus test were made on the earth-rock mixtures with different coarse aggregate contents. When the grading of the earth-rock mixtures is in the range of Tailor grading, the compacting character is good, and the compacting works are too large to make the grading of the earth-rock mixtures degradation in the course of the compaction. In the course of construction, the maximum dry density of the earth-rock mixtures is determined by the large-scale compaction method, otherwise the compacting standard would be reduced. The mechanics property of the earth-rock mixtures is excellent, and the swell increment of the earth-rock mixtures after being immersed in water is smaller than that of the fine-grained soil. 3 tabs, 13 figs, 8 refs.
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第5期11-15,共5页
Journal of Chang’an University(Natural Science Edition)
基金
国家西部交通建设科技项目(200131881207)
关键词
道路工程
土石混合料
击实试验
无侧限抗压强度
CBR
回弹模量
road engineering
earth-rock mixture
compaction test
unconfined compressivestrength
CBR
resilience modulus
