透水路面路基性能的实验研究  

Experimental Research of Roadbed of Porous Road

作　　者：张巨松[1] 张添华[1] 朱桂林[2] 韩自博[1] 

机构地区：[1]沈阳建筑大学材料科学与工程学院,辽宁沈阳110168 [2]中冶集团建筑研究总院,北京100088

出　　处：《沈阳建筑大学学报（自然科学版）》2007年第6期961-964,共4页Journal of Shenyang Jianzhu University：Natural Science

基　　金：辽宁省教育厅项目(202083064);沈阳市建委科技攻关项目

摘　　要：目的研究透水路面土基的渗透、承载力性能及饱水状态下基层的抗冻性能.方法调整黏土和砂之间的比例,采用变水头法测出黏土中的砂含量和渗透系数之间的关系,模仿落球仪快速测定土基现场CBR值实验原理测出含砂量与土基承载力的关系;模拟外界冻融环境测试饱水状态下基层抗冻性能.结果土基的渗透系数随含砂量增加而增强,当含砂量大于25%时,土基的渗透系数均满足规范要求;饱水状态下,土基承载力随土的含砂量的降低呈缓慢下降,当土中含砂量为62.5%时,土基承载力曲线呈明显下降趋势;高空隙率级配碎石在饱水状态及负温下满足抗冻性要求,细集料在饱水状态及负温下有微小膨胀.结论土基的渗透性随含砂量增大而增强.土基承载力随含砂量的减小而降低;基层粗集料在饱水及负温下不膨胀,细集料在饱水及负温下有微小膨胀.Study the performance of subgrade infiltration, bearing capacity and resisting frost of base. Adjust proportion between the soil and the sands, adopting changeable pressure method to measure the relation between the quantity of sands in the soil and infiltration; Imitating the method of drop ball determining CBR to measure the relation between the quantity of sands in the soil and bearing capacity; Imitating frost-thaw circumstance to measure the performance of resisting frost of base under water saturation;subgrade infiltration modulus enhance as the quantity of the sands increase, when the quantity of the sands exceed 25 %, subgrade infiltration modulus all satisfy the criterion; under the state of water saturation, subgrade bearing capacity reduces as the quantity of sands decreaces slowly, when the quantity of sands achieve 62.5 %, subgrade bearing capacity reduces quikly;high void rate stones satisfy the requirement, the sands have a little expand under the state of water saturation and below 0℃. Subgrade infiltration modulus enhance as the quantity of the sands increase, subgrade bearing capacity reduces as the quantity of sands decreace coarse gravels have no expand , the sands have a little expand under the state of water saturation and below 0℃.

关 键 词：基层 土基 抗冻性 渗透性 承载力 

分 类 号：TU502[建筑科学—建筑技术科学]