一种改进的填隙碎石设计及应用  

An Improved Dry-bound Gravel Design and Application

作　　者：覃开蛮 梁进钦 赵承伟 QIN Kai-man;LIANG Jin-qin;ZHAO Cheng-wei(Guangxi Fangcheng Highway Administration Bureau,Fangchenggang,Guangxi,530800;Guangxi Pubei Highway Administration Bureau,Pubei,Guangxi,535300;Guangxi Key Laboratory of Road Structures and Materials,Nanning,Guangxi,530007;Guangxi Jiaoke Engineering Consulting Co.,Ltd.,Nanning,Guangxi,530001)

机构地区：[1]广西壮族自治区防城公路管理局,广西防城港530800 [2]广西壮族自治区浦北公路管理局,广西浦北535300 [3]广西道路结构与材料重点实验室,广西南宁530007 [4]广西交科工程咨询有限公司,广西南宁530001

出　　处：《西部交通科技》2018年第6期58-62,共5页Western China Communications Science & Technology

摘　　要：文章介绍了对填隙碎石混合料采用三档集料进行掺配的设计方案,阐述了改进的填隙碎石混合料机械拌合、摊铺、碾压的工艺要求,并对改进的填隙碎石基层固体体积率进行测试与评价。结果表明:在改进的填隙碎石混合料中,粗集料起到多级嵌挤咬锁稳定作用,细集料起到填充密实的作用;采用开发的虹吸筒法检测评价填隙碎石层的密实度,其固体体积率为85%~90%;旧路加铺填隙碎石层提高了路面的承载力,其弯沉值代表值为30~40(0.01 mm)。This article introduced the design scheme for the use of third-grade aggregates for drybound gravel mixtures,described the process requirements for mechanical mixing,paving,and compaction of improved dry-bound gravel mixtures,and tested and evaluated the solid volumetric rate of improved dry-bound gravel base.The results showed that： in the improved dry-bound gravel mixture,the coarse aggregate plays the multi-stage intrusion,bite-locking and stabilizing roles,and the fine aggregate plays a role of filling and compaction; the developed siphon cylinder method was used to detect and evaluate the compactness of dry-bound gravel layer,its solid volume rate is 85%-90%; the old road overlay dry-bound gravel layer improves the bearing capacity of road surface,and its representative deflection value is 30-40（0. 01 mm）.

关 键 词：道路工程 大粒径间断级配碎石 颗粒组成 工艺 固体体积率 弯沉 

分 类 号：U416.02[交通运输工程—道路与铁道工程]