摘要
考虑运营期路基湿度变化对填料性能的影响,通过干湿循环试验和承载比(CBR)试验,定义了干湿循环强度衰减指数K,结合崩解试验,提出了一种基于干湿循环强度衰减指数K和崩解特性的红砂岩填料分类方法。依托鄂西地区某高速公路工程,测试了9处不同红砂岩填料崩解性与干湿循环强度衰减指数,分析得出红砂岩填料分类指标与标准;结合干湿循环效应分类指标和规范要求的CBR值标准,明确了不同类型红砂岩填料在路基结构中的适用范围和技术要求。
Considering the influence of subgrade humidity change on the performance of filling materials during operation period,the dry-wet cycle strength attenuation index K is defined through dry-wet cycle test and California Bearing Ratio(CBR)test.Combined with disintegration test,a classification method of red sandstone filler based on dry-wet cycle strength attenuation index K and disintegration characteristics is proposed.Based on the highway project in Western Hubei Province,the disintegration index and dry-wet cycle strength attenuation index of nine different red sandstone fillers were tested,and the classification indexes and standards of red sandstone fillers were obtained.Combined with the classification index of dry-wet cycle effect and CBR standard,the application scope and technical requirements of different types of red sandstone filler in subgrade structure are defined.
作者
何斌
邱洲
王云
付伟
张晶
张静波
HE Bin;QIU Zhou;WANG Yun;FU Wei;ZHANG Jing;ZHANG Jingbo(CCCC Second Highway Consultants Co.,Ltd.,Wuhan 430056,China;CCCC Northeast Regional Headquarters,Shenyang 110100,China)
出处
《路基工程》
2021年第2期45-50,共6页
Subgrade Engineering
关键词
路基填料
分类方法
红砂岩
干湿循环
强度衰减指数
subgrade filler
classification method
red sandstone
dry-wet cycle
strength attenuation index
