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王    昊 ¹  , 韦金城² , 宋晓辉¹ , 李雪和^3 ,4 , 吴文娟² , 刘海峰⁴ , 任瑞波⁵

 

 ( 1. 山东高速股份有限公司 ，山东 济南 250000;

2. 山东省交通科学研究院 高速公路养护技术交通行业重点实验室 ，山东 济南 250102;

3. 武汉桓创技术服务有限公司 ，湖北 武汉 430070;

4. 中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室 ，湖北 武汉 430071 ;

5. 山东建筑大学 交通工程学院 ，山东 济南 250101)

摘   要： 黄泛区粉土主要分布于山东 、安徽 、河南和江苏等地区，是由黄河泛滥 、改道沉积而形成 。在黄泛区的公路工程中，该种类型粉土常被用作路基填筑材料。本文聚焦黄泛区粉土的路用工程特性，对粉土的矿 物组成 、粒径分布 、界限含水率 、静动力学特性及冻融特性进行总结 。在此基础上，探究了粉土改性固化的方法，对无机类固化剂、有机类固化剂以及生物酶固化剂改性固化粉土的作用机理 、力学强度和耐久性等方面进行综合分析。从粉土的改性固化效果来看，无机类固化剂对粉土的固化效果在早强、水稳性和冻稳性等方面存在明显差异； 复合类固化剂具有成本低，稳定性好等特点，在实际工程中较为广泛采用； 生物酶类固化剂由于技术成熟度尚待提高，目前尚未在公路工程中大规模推广应用。但由于生物酶类固化粉土的方式具有绿色 、低 碳 、环保等优势，综合建议： 在夯实和扩宽复合类固化剂类型及应用范围的基础上，稳步提升和改善生物酶类改性固化粉土技术，在保证改性粉土优良的路用性能的同时，为我国的碳中和规划作出贡献。

关键词： 黄泛区粉土； 工程特性； 改性固化； 静动力学； 冻融循环； 水稳定性

中图分类号： U414      

文献标志码： A      

文章编号： 1005-8249 (2023) 05-0107- 13

 DOI : 10. 19860/j.cnki.issn1005-8249.2023.05.018

WANG Hao¹ , WEI Jincheng² , SONG Xiaohui¹ , LI Xuehe^3 ,4 , WU Wenjuan² , LIU Haifeng⁴ , REN Ruibo⁵

( 1. Shandong Hi-Speed Company Limited , Jinan 250000 , China;

2. Key Laboratory for Expressway Maintenance Technology Ministry of Transport , Shandong Transportation

Research Institute , Jinan 250102 , China;

3. Wuhan Huanchuang Technical Services Co. , Ltd. , Wuhan 430070 , China;

4. State Key Laboratory of Geomechanics and Geotechnical Engineering , Institute of Rock and Soil Mechanics ,

Chinese Academy of Sciences , Wuhan 430071 , China;

5. School of Traffic Engineering , Shandong Jianzhu University , Jinan 250101 , China)

Abstract: The silt in the Yellow River flooded area is widely distributed in Shandong, Anhui, Henan and Jiangsu province which is formed by the flooding of the Yellow River and the diverted sediments. This paper focuses on the road engineering characteristics of silt in the Yellow River flood area, and summarizes the mineral composition, particle size distribution, boundary moisture content, static and dynamic characteristics and freeze-thaw characteristics of silt. On this basis, the method of modification and solidification of silt is explored, and the action mechanism, mechanical strength and durability of inorganic curing agent, organic curing agent and biological enzyme curing agent modified and solidified silt are comprehensively analyzed. From the point of view of the modified curing effect of silt, there are obvious differences in the early strength, water stability and freeze stability of inorganic curing agents. Composite curing agent is widely used in practical engineering because of its low cost and good stability. Biological enzyme curing agent has not been widely used in highway engineering because its technical maturity needs to be improved. However, due to the advantages of green, low-carbon and environmental protection, it is suggested that on the basis of tamping and broadening the type and application scope of composite curing agent, the technology of biological enzyme modified and solidified silt should be steadily improved to ensure the excellent road performance of modified silt and contribute to China's carbon neutralization planning.

Keywords:  silt in the Yellow River Flood area; engineering properties; modified curing; static-dynamic mechanics; freeze-thaw cycles; moisture stability

∗基金项目： 国家自然科学基金项目(42107202 , 42107213) , 湖北省自然科学基金项目 (2020CFB243) 。

作者简介： 王昊  (1971 —) , 男 ，硕士研究生 ，主要从事公路与城市道路工程方面研究。

通信作者： 李雪和  (1996—) , 男 ，硕士研究生 ，主要从事粉土改性固化方面研究。 

收稿日期： 2022-06-24