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吴仍武¹ , 张    涛¹ , 李林贵¹ , 郑卫强²

 

(1. 广东华路交通科技有限公司 , 广州   510420; 2. 东华理工大学 土木与建筑工程学院 , 南昌    330013)

摘  要: 针对滨海地区软土路基拓宽改造问题 , 通过室内试验和数值分析 , 探讨了玄武岩纤维固化剂对滨海软土强度性能的改良效果 。系统分析了固化后软土的力学性能变化规律 , 并构建了新旧路基-地基相互作用模型 , 研究了路基模量 、行车荷载等因素对新旧路基差异沉降的影响规律 。研究表明 : 0. 3% 的玄武岩纤维掺量可显著提升软土强度并抑制收缩变形 。同时 , 构建的新旧路基-地基相互作用模型显示 , 加宽宽度增加会加大路基顶面沉降 , 但固化填料使最大差异沉降较普通填料降低约 42. 9%。此外 , 行车荷载会加剧沉降 , 尤其在新旧路基结合处 , 而固化土路基填料在不同行车荷载下最大差异沉降降低 34. 0% ~42. 1%。研究结果可为该领域的研究提供参考。

关键词: 软土路基 ; 固化改良 ; 玄武岩纤维 ; 强度性能 ; 数值分析 ; 差异沉降

中图分类号: TU44      文献标志码: A      文章编号: 1005-8249 (2026) 04-0107-08

DOI:10. 19860/j. cnki. issn1005-8249. 2026. 04. 016

 

Research on the Improvement of the Strength Performance of Coastal

Soft Soil by Using Basalt Fiber Curing Agent

WU Rengwu¹ , ZHANG Tao¹ , LI Lingui¹ , ZHENG Weiqiang²

(1. Guangdong Hualu Transport Technology Co. , Ltd. , Guangzhou 510420, China;

2. School of Civil and Architectural Engineering, East China University of Technology, Nanchang 330013, China)

Abstract : This study addresses the problem of expanding soft soil subgrades in coastal areas.  Through laboratory tests and numerical analyses, it explores the enhancing effect of basalt fiber solidifiers on the strength of coastal soft soils.  The research analyzes the mechanical behavior of solidified soft soils and develops a new-old subgrade - ground interaction model.  This model investigates the impact of ground compression modulus and traffic loads on differential settlement between new and old subgrades.  Results show that a 0. 3% basalt fiber content significantly boosts soft soil strength and reduces contraction deformation. The model also indicates that increasing the expansion width increases the subgrade surface settlement, but the maximum differential settlement of the solidified fill is about 42. 9% lower than that of the conventional fill.  Furthermore, traffic loads exacerbate settlement, particularly at the new-old subgrade junction. However, the maximum differential settlement of the solidified subgrade is reduced by 34. 0% to 42. 1% under different traffic loads.

Key words: soft soil subgrade; solidification improvement; basalt fiber; strength performance; numerical analysis;differential settlement