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张圣山¹，宋国春²，李   兴²

 

 

(1.贵州航空港投资发展有限公司，贵阳 550001；2.民航机场建设工程有限公司，贵阳 550001)

摘要：贵州山区软土分布广泛，易发生滑坡等地质灾害，掺加高炉矿渣和粉煤灰可以有效加固软土。基于此，制备了不同高炉矿渣和粉煤灰掺量的固化软土，开展了无侧限抗压强度、弹性模量、内聚力、内摩擦角、水稳定性等力学性能测试，分析了不同高炉矿渣和粉煤灰掺量以及高炉矿渣和粉煤灰掺比对固化软土的影响规律。结果表明:固化软土抗压强度、弹性模量、内聚力随着粉煤灰与高炉矿渣总掺量的提高而增大，建议总掺量为18%~24%；粉煤灰与高炉矿渣掺比为3∶7对软土抗压强度、弹性模量以及抗剪强度的提升效果最佳；固化软土的水稳定性随总掺量的增大而增大，建议总掺量为24%。研究结果可为贵州山区软土地基加固与地质灾害防治提供有效的材料配比依据，同时也为工业固废在岩土工程中的资源化利用提供了借鉴。

关键词：高炉矿渣；粉煤灰；加固软土；力学性能

中图分类号：U416

文献标志码：A

文章编号：1005-8249（2025）06-0072-05

DOI：10.19860/j.cnki.issn1005-8249.2025-06-013

 

 

ZHANG Shengshan¹,SONG Guochun²,LI Xing²

 

 

(1.Guizhou Airport Investment and Development Co.,Ltd.,Guiyang 550001,China；

 

2.Civil Aviation Airport Construction Engineering Co.,Ltd.,Guiyang 550001,China)

 

Abstract：The soft soil is widely distributed in the mountainous area of Guizhou province,China,and geological disasters such as landslides have occurred.The mixture of blast furnace slag and fly ash can effectively strengthen soft soil.Based on this,solidified soft soil test materials with different contents of blast furnace slag and fly ash were prepared,and mechanical properties such as unconfined compressive strength,elastic modulus,cohesion,internal friction angle and water stability were tested.The influences of different blast-furnace slag and fly ash contents and ratio of blast-furnace slag and fly ash contents on solidified soft soil were analyzed.The results show that:the compressive strength,elastic modulus and cohesion of the solidified soft soil increase with the increase of the total content of fly ash and blast furnace slag,and the recommended total content is 18%~24%.When the ratio of fly ash to blast furnace slag is 3∶7,the compressive strength,elastic modulus and shear strength of soft soil are the best.The water stability of the solidified soft soil increases with the increase of the total content,and the recommended total content is 24%.The research results can provide an effective material ratio basis for soft soil foundation reinforcement and geological disaster prevention in Guizhou mountainous area,and also provide a useful reference for the resource utilization of industrial solid waste in geotechnical engineering.

 

Key words：blast furnace slag;fly ash;reinforcing soft soil;mechanical property

作者简介：张圣山（1977—），男，硕士研究生，高级工程师，研究方向:公路工程、水利工程、城市综合体。

收稿日期：2023-07-13