较高含泥量水流沉积粉细砂在高等级公路路床中的适用性  

Applicability of Fine Sand Sedimentation from Water Flow with High Mud Cotent in the Roadbed of High-class Highway

作　　者：李鹏 孔永博 苏擎 LI Peng;KONG Yongbo;SU Qing(Sichuan Highway Planning,Survey,Design and Research Institute Ltd.,Chengdu,Sichuan 610041,China;Sichuan Road&Bridge(Group)Co.,Ltd.,Chengdu,Sichuan 610041,China;Heilongjiang Transportaion Investment Engineering Consulting Group Co.,Ltd.,Harbin,Heilongjiang 150001,China)

机构地区：[1]四川省公路规划勘察设计研究院有限公司,四川成都610041 [2]四川省公路桥梁建设集团有限公司,四川成都610041 [3]黑龙江省交投工程咨询集团有限公司,黑龙江哈尔滨150001

出　　处：《黑龙江交通科技》2025年第2期12-15,20,共5页Communications Science and Technology Heilongjiang

摘　　要：填砂路基在国内外公路建设中已大量采用,但对较高含泥量水流沉积粉细砂作为高等级公路路床的研究工作却较少,相关规范规定“高速公路、一级公路路床粗粒料缺乏时,可采用无机结合料改良细粒土”,即不推荐直接采用粉细砂作为路床填料。针对这一规定,本次工作选取试验路段,摸索施工机械和施工工艺,在测定压实度和回弹模量后指出:较高含泥量水流沉积粉细砂是适宜于重载交通荷载下高等级公路路床填筑的,但对于特重交通荷载要求的高等级公路仍应进行改良。Sand-filled subgrade has been widely used in road construction at home and abroad,but there is little research work on water flow deposition of fine sand as a high-grade highway road bed.Relevant regulations stipulate that“when coarse gravel is lacking on highway and first-grade highway road bed,inorganic binder can be used to improve fine soil”,that is,it is not recommended to directly use fine sand as road bed fller.In response to this provision,this work selected the test section,explored the construction machinery and construction technology,and after measuring the compaction degree and resilience modulus,it was pointed out that:the water sediment fine sand with high mud content is suitable for the filling of high-grade highway road bed under heavy traffic load,but the high-grade highway with extra heavy traffic load should still be improved.

关 键 词：公路路床 粉细砂 填筑 含水率 

分 类 号：U416.1[交通运输工程—道路与铁道工程]