天然砂砾石路面基层的级配调整技术研究  

Gradation Adjustment Technology for Natural Gravel Pavement Base

作　　者：周北[1] 苏应全[1] 张洪举[2] 杨慧丽[2] 

机构地区：[1]广西壮族自治区公路管理局,广西南宁530021 [2]交通运输部公路科学研究院,北京100088

出　　处：《交通标准化》2010年第17期83-85,共3页Communications Standardization

基　　金：广西区农村公路工程关键技术标准研究(广西区交通厅交综合发〔2007〕76号)

摘　　要：天然砂砾石分布广泛,储量丰富,且强度高、透水性强,非常适宜作为路基填料,但作为路面基层和底基层时,由于天然砂砾石颗粒偏粗、级配较差,无法满足路面基层施工技术规范的要求。以广西贺州市昭平县富(裕)木(格)路为依托工程,现场取样后,进行砂砾石的破碎和级配调整,研究结果表明,天然砂砾石按一定的控制粒径经过二次破碎后,与筛余的天然砂砾石按过筛前原比例掺配即可得到满足规范要求的级配碎砾石。这项研究对于推动天然砂砾石在路面结构中的应用具有重要的指导意义。Natural gravel is widely distributed and has abundance reserves,high strength and good permeability.It is very suitable for base filling.But when it is used in base and subbase,it can not meet the requirement of pavement base construction technology criterion because of its coarse grain and bad gradation.Combining with the engineering of Fuyu-Muge Road in Zhaoping County,Hezhou City,Guangxi Autonomous Region,after field sampling,the rubblization for gravel and adjustment for gradation are executed.The result of research shows that through the secondary rubblization of natural gravel according to a certain controlled grain size,mixing it with sieve residue by original proportion can form graded gravel meeting the requirement of criterion.It has guiding effect on promoting the application of natural gravel in pavement structure.

关 键 词：路面 基层 天然砂砾 级配 破碎 

分 类 号：U416.214[交通运输工程—道路与铁道工程]