红层泥岩路基填料分类与高效利用技术  

Classification and Efficient Utilization Technology of Red-bed Mudstone Roadbed Filler

作　　者：陈晓斌[1] 喻昭晟 李志勇 周雨晴 刘先锋 CHEN Xiaobin;YU Zhaosheng;LI Zhiyong;ZHOU Yuqing;LIU Xianfeng(School of Civil Engineering,Central South University,Changsha,Hunan 410018,China;Hunan Communications Research Institute Co.,Ltd.,Changsha,Hunan 410114,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu,Sichuan 610031,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410018 [2]湖南省交通科学研究院有限公司,湖南长沙410114 [3]西南交通大学土木工程学院,四川成都610031

出　　处：《公路工程》2024年第4期51-56,94,共7页Highway Engineering

基　　金：国家自然科学基金项目(51978674)。

摘　　要：红层泥岩广泛分布于我国的西南、西北、华中及华南地区,就近采用红层泥岩填筑路基有助于提高经济效益、降低能源消耗、减小环境破坏,然而红层填料的高效利用技术还有待开展进一步研究。由于红层泥岩特殊的水理特性,红层泥岩的科学分类极其重要,不同等级的红层泥岩需要不同的工程处置方法,对红层泥岩进行科学的分类是高效利用红层泥岩的前提。基于红层泥岩路基病害调研,分析了病害产生的原因及分类。通过岩石耐崩解试验及DEM数值模拟揭示了“湿度-荷载”耦合下红层泥岩的宏观及细观崩解机制,得到了耐久性控制指标。基于耐崩解指数I d的红层泥岩分类方法可有效区分不同红层泥岩填料长期工程特性。最终总结了红层泥岩填料高效利用技术,并成功运用于实际工程施工中。Red-bed mudstone is widely distributed in Southwest,Northwest,Central China,and South China regions in our country.Using red-bed mudstone for roadbed filler helps to improve economic efficiency and reduce environmental damage.However,the efficient utilization technology of red-bed mudstone filler still needs further research.Due to the special hydrological characteristics of red-bed mudstone,scientific classification of red-bed mudstone is extremely important.Different grades of red-bed mudstone require different engineering disposal methods,and scientific classification of red-bed mudstone is the prerequisite for efficient utilization of red-bed mudstone.Based on the research of red-bed mudstone subgrade disease,this paper analyzes the causes and classification of the disease.Through rock slake durability test and DEM numerical simulation,the macro and mesoscopic disintegration mechanism of red-bed mudstone under the coupling of"humidity and load"is revealed,and the durability control index is obtained.The classification method of red-bed mudstone based on disintegration resistance index I d can effectively distinguish the long-term engineering characteristics of different red-bed mudstone filler.Finally,the efficient utilization technology of red-bed mudstone filler is summarized and successfully applied in practical engineering construction.

关 键 词：路基填料 红层泥岩 崩解指标 填料分类 利用技术 

分 类 号：U416.1[交通运输工程—道路与铁道工程]