土石混合料路用工程力学性质试验  

Experiment on engineering mechanics property of earth-rock mixtures in road

作　　者：周志军[1] 南浩林 张熠[3] 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064 [2]陕西省交通厅,陕西西安710068 [3]陕西省公路局,陕西西安710068

出　　处：《长安大学学报（自然科学版）》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)

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.

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 

分 类 号：U414.01[交通运输工程—道路与铁道工程]