废弃口罩加筋的煤矸石路基粗粒土填料动力特性试验研究  

Experimental Study on Dynamic Characteristics of Coal Gangue Roadbed Filler Reinforced with Waste Masks

作　　者：肖天祥 高文华[1] 张宗堂[1] 沈子钰 何钰 周泽林 XIAO Tianxiang;GAO Wenhua;ZHANG Zongtang;SHEN Ziyu;HE Yu;ZHOU Zein(Hunan Provincial Key Laboratory of Geotechnical Engineering for Stability Control and Health Monitoring,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南科技大学岩土工程稳定控制与健康监测湖南省重点实验室,湖南湘潭411201

出　　处：《防灾减灾工程学报》2024年第2期426-433,共8页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家自然科学基金项目(52208341);湖南省自然科学基金项目(2023JJ40293);湖南省科技人才托举工程项目-“小荷”科技人才专项(2023TJ-X74);湖南省教育厅科学研究优秀青年项目(23B0492)资助。

摘　　要：为实现废弃口罩资源化再利用,将其运用于煤矸石路基的加筋中,通过开展循环荷载作用下不同加筋方式、不同口罩含量的煤矸石路基填料大型动力三轴试验,探讨了口罩加筋煤矸石路基的可行性和影响因素,研究了口罩对煤矸石路基的加筋效果。研究结果表明:(1)口罩加筋煤矸石路基粗粒土填料能取得良好的加筋效果;(2)不同加筋方式、纤维尺寸、口罩裁剪方向、路基中的口罩含量均会对口罩加筋煤矸石路基粗粒土填料的加筋效果产生影响;(3)在已尝试的试验方案中,土样每20 cm铺设一层口罩织物的加筋效果系数为1.663,加筋效果最为出色。在不同口罩含量对比试验中,土样中口罩含量为30个时,加筋效果系数为2.3,取得了最好的加筋效果,但从现有数据规律中可推论仍有提升空间。研究成果可为煤矸石路基填料改良提供参考。To achieve the recycling of mask waste,they were used in the reinforcement of coal gangue roadbeds.By conducting a large-scale dynamic triaxial test under cyclic loading with different reinforce-ment methods and mask contents,the feasibility and influencing factors of mask reinforcement in coal gangue roadbeds were investigated,and the reinforcing effect of masks in roadbeds was studied.The results showed that:(1)Coarse-grained soil fillers for roadbeds reinforced with masks in coal gangue demonstrated effective reinforcement;(2)Different reinforcement methods,fiber size,mask cutting di-rection,and mask content in roadbeds could affect the effectiveness of reinforcement;(3)Among all the tested schemes,the one using a layer of mask fabric laid every 20cm in the soil sample achieved the highest reinforcement effect coefficient of 1.663.In the comparison tests of different mask con-tents,a mask content of 30 in the soil sample achieved the highest reinforcement effect coefficient of 2.3.However,the data suggested that there was still potential for further improvement.The research results can serve as a reference for the improvement of coal gangue subgrade fillers.

关 键 词：路基加筋 废弃口罩处理 大型三轴试验 累积变形 

分 类 号：TU443[建筑科学—岩土工程]