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土体成分和结构的复杂性决定了其力学特性与金属、混凝土和岩石等材料有较大差异,土体抗拉强度本质是土体中存在基质吸力等土颗粒与水、气相结合形成的吸引力,包括颗粒与颗粒之间,水分子之间,水分子与土颗粒之间的作用力。因此,研究土体抗拉特性的重点在研究土的干密度和含水量对抗拉强度的影响。随着土体拉伸试验仪器的不断改进,国内外对土的抗拉特性研究也不断深入。本文从五种不同的拉伸试验入手,介绍了国内外对土体抗拉特性的研究现状,并对抗拉强度理论进行了相应的归纳总结,提出目前研究中存在的问题并预测今后可能的发展方向。
The complexity of soil composition and structure determines that its mechanical properties are quite different from those of metal, concrete and rock, and the essence of soil tensile strength is the attraction of soil particles with water and gas in the soil Force, including particles and particles, between water molecules, water molecules and soil particles between the force. Therefore, the study of tensile properties of soil focuses on the influence of soil dry density and water content on tensile strength. With the continuous improvement of soil tensile testing equipment, the study on the tensile properties of soil at home and abroad has also continued to deepen. This article starts with five different kinds of tensile tests, introduces the current research status of tensile properties of soil at home and abroad, summarizes the theory of tensile strength, puts forward the problems existing in current research and predicts the possible future development direction.