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王    昊 ¹  , 韋金城² , 宋曉輝¹ , 李雪和^3 ,4 , 吳文娟² , 劉海峰⁴ , 任瑞波⁵

 

 ( 1. 山東高速股份有限公司 ，山東 濟(jì)南 250000;

2. 山東省交通科學(xué)研究院 高速公路養(yǎng)護(hù)技術(shù)交通行業(yè)重點(diǎn)實(shí)驗(yàn)室 ，山東 濟(jì)南 250102;

3. 武漢桓創(chuàng)技術(shù)服務(wù)有限公司 ，湖北 武漢 430070;

4. 中國科學(xué)院武漢巖土力學(xué)研究所 巖土力學(xué)與工程國家重點(diǎn)實(shí)驗(yàn)室 ，湖北 武漢 430071 ;

5. 山東建筑大學(xué) 交通工程學(xué)院 ，山東 濟(jì)南 250101)

摘   要： 黃泛區(qū)粉土主要分布于山東 、安徽 、河南和江蘇等地區(qū)，是由黃河泛濫 、改道沉積而形成 。在黃泛區(qū)的公路工程中，該種類型粉土常被用作路基填筑材料。本文聚焦黃泛區(qū)粉土的路用工程特性，對(duì)粉土的礦 物組成 、粒徑分布 、界限含水率 、靜動(dòng)力學(xué)特性及凍融特性進(jìn)行總結(jié) 。在此基礎(chǔ)上，探究了粉土改性固化的方法，對(duì)無機(jī)類固化劑、有機(jī)類固化劑以及生物酶固化劑改性固化粉土的作用機(jī)理 、力學(xué)強(qiáng)度和耐久性等方面進(jìn)行綜合分析。從粉土的改性固化效果來看，無機(jī)類固化劑對(duì)粉土的固化效果在早強(qiáng)、水穩(wěn)性和凍穩(wěn)性等方面存在明顯差異； 復(fù)合類固化劑具有成本低，穩(wěn)定性好等特點(diǎn)，在實(shí)際工程中較為廣泛采用； 生物酶類固化劑由于技術(shù)成熟度尚待提高，目前尚未在公路工程中大規(guī)模推廣應(yīng)用。但由于生物酶類固化粉土的方式具有綠色 、低 碳 、環(huán)保等優(yōu)勢(shì)，綜合建議： 在夯實(shí)和擴(kuò)寬復(fù)合類固化劑類型及應(yīng)用范圍的基礎(chǔ)上，穩(wěn)步提升和改善生物酶類改性固化粉土技術(shù)，在保證改性粉土優(yōu)良的路用性能的同時(shí)，為我國的碳中和規(guī)劃作出貢獻(xiàn)。

關(guān)鍵詞： 黃泛區(qū)粉土； 工程特性； 改性固化； 靜動(dòng)力學(xué)； 凍融循環(huán)； 水穩(wěn)定性

中圖分類號(hào)： U414      

文獻(xiàn)標(biāo)志碼： A      

文章編號(hào)： 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

?基金項(xiàng)目： 國家自然科學(xué)基金項(xiàng)目(42107202 , 42107213) , 湖北省自然科學(xué)基金項(xiàng)目 (2020CFB243) 。

作者簡(jiǎn)介： 王昊  (1971 —) , 男 ，碩士研究生 ，主要從事公路與城市道路工程方面研究。

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

收稿日期： 2022-06-24