基于工程实际，阐述有控放气和无控放气条件下含气土变形特征及应力路径对含气土的工程特性的影响，并总结出对应的工程措施。针对含气土工程特性机制认识不清的难题，介绍含气土分类及结构特征、力学特征、变形特征等工程特性问题的发展动态与存在的问题。综合研究指出：
目前缺少能适用多种复杂应力路径的抗剪强度公式；本构模型缺乏针对性的理论基础；沉降模型考虑的因素较少。总结含气土工程特性现有研究成果，提出未来含气土工程特性研究方向的相关建议：
含气土的基本物理力学特性研究；各种施工应力路径下含气土变形机制研究；列车循环荷载作用下含气土变形机制研究；波浪荷载作用下海洋含气土的液化与地质灾害研究。
The deformation characteristics of gassy soil and the
influence of the stress path on the engineering characteristics of gassy soil
under controlled and uncontrolled deflation conditions are described, and the
corresponding engineering measures are summarized. The development trends and
existing problems of gassy soil classification and structural characteristics,
mechanical characteristics, deformation characteristics, and other engineering
characteristics are introduced. The results of comprehensive research indicate
the lack of shear strength formulas that can be applied to a variety of complex
stress paths. Further, the constitutive model lacks a pertinent theoretical
basis, and the settlement model considers fewer factors. Furthermore, the
existing research results regarding the engineering characteristics of gassy
soil are summarized, and relevant suggestions for future research on the
engineering characteristics of gassy soil are proposed. The following features
are examined in this study: basic physicmechanical properties of gassy
soil, deformation mechanism of gassy soil under various construction stress
paths, deformation mechanism of gassy soil under train moving loads, and
liquefaction and geological hazards of marine gassy soil under wave load.
