千枚岩填料力学特性与改良技术研究综述

The Review on the Mechanical Properties and Improvement Techniques of Phyllite Filling Materials

摘要: 千枚岩作为一种广泛分布的变质岩，储量丰富，常被考虑用于公路与铁路路基填筑。然而，其压实难度大、抗剪强度低、水稳定性差等工程缺陷，限制了其直接作为路基填料的可行性。本文阐述千枚岩作为路基填料的基本物理力学特性、水稳定性与动力响应规律，梳理其化学改良、物理改良及复合改良等主流技术的国内外研究进展，分析不同改良方案的作用机理、技术优势与适用条件。总结千枚岩改良土的微观结构演化规律与长期稳定性影响因素。指出当前研究中存在的不足，并对未来研究方向进行展望，以期为千枚岩在路基工程中的安全高效利用提供理论参考与技术支撑。

Abstract: Phyllite, a widely distributed metamorphic rock with abundant reserves, is often considered for use in highway and railway roadbed filling. However, its engineering drawbacks—such as difficulty in compaction, low shear strength, and poor water stability—limit its feasibility as a direct filler material. This paper reviews the fundamental physical and mechanical properties of phyllite as a roadbed filler, along with its water stability and dynamic response characteristics. It summarizes research progress, both domestically and internationally, on mainstream improvement techniques including chemical, physical, and composite modifications. The mechanisms, advantages, and applicable conditions of different improvement methods are analyzed. Furthermore, the evolution of the microstructure and factors influencing the long-term stability of improved phyllite soil are discussed. The paper also identifies current research gaps and suggests directions for future study, aiming to provide theoretical reference and technical support for the safe and efficient use of phyllite in roadbed engineering.