张敏霞, 王亚涛, 刘璐,等.微生物固化工程裸土抗风蚀扬尘性能试验研究[J].河南理工大学学报（自然科学版）,doi:10.16186/j.cnki.1673-9787.2023030026.

ZHANG M X, WANG Y T, LIU L, et al.Experimental study on wind erosion and fugitive dust resistance performance of engineering bare soil in microbial consolidation[J].Journal of Henan Polytechnic University(Natural Science) ,doi:10.16186/j.cnki.1673-9787.2023030026.

微生物固化工程裸土抗风蚀扬尘性能试验研究(网络首发)

张敏霞1, 王亚涛1, 刘璐2, 牛双建3, 康俊亚1, 房燕飞1

1.河南理工大大学 土木工程学院，河南 焦作  454000;2.南京工业大学 交通运输工程学院，江苏 南京  210000;3.深圳市市政工程总公司，广 东 深圳  518000

摘要:基于微生物诱导碳酸钙沉积（MICP）固化土体技术，通过利用巴氏生孢八叠球菌，进行微生物固 化典型工程裸土建筑渣土和砂土试验，研究微生物固化试样抗风蚀扬尘效果以及其固化机理，提出一种新 型土壤抑尘措施。根据风洞试验和表面强度测试结果表明：同比条件下，微生物固化试样风蚀质量累计损 失远低于洒水试样，风洞试验后表面强度有所下降，但前者表面强度远高于后者，试验表明了微生物固化 工程裸土提升其抗风蚀扬尘的显著效能和可行性；基于电镜扫描和X射线能谱分析显示：土样经微生物固 化后，土颗粒表面和孔隙间均产生大量碳酸钙沉积，有效增强了土颗粒间黏结性能，CaCO₃晶体结构在不 同土壤中略有差异，在建筑渣土主要为片状结构、在砂土试样为球状或球状堆积体结构。试验结果表明微 生物固化技术有效提升了土壤抗风蚀扬尘性能，具有一定的参考价值。

关键词:微生物固化;工程裸土;抗风蚀扬尘;CaCO₃

中图分类号：TU41

doi:10.16186/j.cnki.1673-9787.2023030026

基金项目:国家自然科学基金项目（52008207）

收稿日期:2023-03-10

修回日期:2023-05-16

网络首发日期:2023-12-03

Experimental study on wind erosion and fugitive dust resistance performance of engineering bare soil in microbial consolidation（Online）

ZHANG Minxia1, WANG Yatao1, LIU Lu2, NIU Shuangjian3, KANG Junya1, FANG Yanfei1

1.School of Civil Engineering， Henan Polytechnic University， Jiaozuo  454000， Henan， China;2.College of Transportation Engineering， Nanjing Tech University， Nanjing  210000， Jiangsu， China;3.Shenzhen Municipal Engineering Corporation， Shenzhen  518000， Guangdong， China

Abstract:Based on the technology of Microbial Induced Calcite Precipitation （MICP） to solidify soil， the test of microbial solidification of typical construction bare soil construction waste and sand was carried out by using Sporosarcina pasteurii. The effect of wind erosion dust resistance of microbial solidified specimens and its solidification mechanism were studied， and a new soil dust suppression measure was proposed. The results of wind tunnel test and surface strength test showed that， under the same condition， the cumulative loss of wind erosion mass of microbial solidified specimens was much lower than that of watering specimens. The surface strength decreases after wind tunnel test， but the surface strength of microbial solidified specimens was much higher than that of watering specimens. The test showed that the microbial solidified construction bare soil had significant efficiency and feasibility to improve its resistance to wind erosion dust. Based on scanning electron microscopy and X-ray energy spectrum analysis showed， after the soil specimen was solidified by microorganisms， a large amount of CaCO₃ deposition was produced on the surface of the soil particles and between the pores,which effectively enhanced the bonding performance between the soil particles. The crystal structure of CaCO₃ was slightly different in different soils. It was mainly flaky structure in construction waste and spherical or spherical accumulation structure in sand specimens. The test results showed that the microbial solidification technology effectively improved the soil anti-wind erosion dust performance and had certain reference value.

Key words:microbial solidification;construction bare soil;wind erosion dust resistance;CaCO₃

CLC：TU41