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具有结构性的土体强度问题一直是岩土领域研究的重要问题。岩土的结构非常复杂,其中颗粒相互连接构成颗粒链状态是重要结构形态之一。该文通过建立的土体结构的颗粒链模型,对一般类型的颗粒链和摩擦型类型颗粒链的形成条件进行了分析,得到了摩擦型颗粒链形成稳定链的条件。并以此为基础,试图建立了基于颗粒稳定链的土体强度理论。分析发现摩擦型颗粒材料中颗粒形成稳定链的条件,既和颗粒构成的组构关系有关,也和颗粒的形态有关;颗粒链的强度会影响到土体的宏观强度;土体中颗粒稳定链的长度、密度和方向分布等因素是影响土体强度的重要因素,并且这些因素是反映和描述土体结构性的重要参数。基于颗粒稳定链的土体强度理论,从某一方面揭示了摩擦型颗粒材料承担荷载的本质。
The problem of structural soil strength has always been an important issue in the field of geotechnical engineering. The structure of rock and soil is very complicated, in which the particles are connected to each other to form the particle chain state is one of the important structural forms. In this paper, the formation conditions of general types of particle chain and friction type particle chain are analyzed by the established particle chain model of soil structure, and the conditions for the formation of stable chain of the friction particle chain are obtained. Based on this, an attempt is made to establish the soil strength theory based on the particle stabilized chain. It was found that the formation of stable chains of particles in the frictional particles was related to the structure of the particles and the morphology of the particles. The strength of the particle chains affected the macro-strength of the soil. The stability of particles in the soil The factors such as length, density and direction distribution are important factors affecting soil strength, and these factors are important parameters that reflect and describe the soil structure. Based on the soil strength theory of particle stabilized chains, the essence of the load of frictional granular materials is revealed from one aspect.