纤维加筋改良土的研究进展

Study on Fiber Modified and Reinforced Subgrade Soil:Overview

近年来,为解决路基强度不足的问题,以纤维为基础的土体改良与加固技术在已有工程中彰显出巨大的优势与潜力。为了解无机结合料与纤维基体对土体性质的改善效果,本文介绍了土体化学改良的形成机理,采用文献研究法分别归纳、总结了聚丙烯纤维与玄武岩纤维在土体改良中的特点与改良机理,并展望了基于纤维在土体加固与改良方面的应用,最终得出以下结论:纤维改良后的土体力学性质得以提升,由于土质不同,在最佳掺量下纤维“增韧”效果明显,为各类纤维土改良与加固研究提供借鉴与参考。

In recent years,in order to solve the problem of insufficient subgrade strength,fiber based soil modification and reinforcement technology has shown great advantages and potential in existing projects.In order to understand the modification effect of inorganic binder and fiber matrix on soil properties,this paper introduces the formation mechanism of soil chemical modification,and summarizes the characteristics and modification mechanism of polypropylene fiber and basalt fiber in soil modification by literature research method,and looks forward to the application of fiber in soil reinforcement and modification.Finally,the following conclusions are drawn:the mechanical properties of the soil after fiber modified are improved,due to the different soil texture,the effect of fiber“toughening”is obvious under the optimal dosage,which provides reference for the modification and reinforcement of various types of fiber soil.