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为研究粗粒含量对红砂岩土静力压实变形特征的影响,利用自制装置在电子万能试验机上进行静力压实试验,得到6种不同粗粒含量红砂岩土静力压实试验的压力-位移关系,分析粗粒含量对静力压实变形特征的影响。结果表明:不同粗粒含量红砂岩土在静力压实过程中的应力与应变符合指数关系;在相同的应力作用下,当粗粒含量为60%时,土体产生的应变最大;不同粗粒含量红砂岩土的压缩模量与对应应力范围终值之间呈线性关系,在相同应力范围内,当粗粒含量为60%时土体的压缩模量最小,压缩性最高;红砂岩粗粒土的静力压实过程可分为3个阶段,分别为压密阶段、破碎阶段和稳定阶段;在静力压实过程中,应变增长存在拐点;应变拐点的出现,标志着红砂岩粗粒土静力压实过程变形阶段的转变。
In order to study the influence of coarse content on the static compaction characteristics of red sandstone, the static compaction test was carried out on the electronic universal testing machine with self-made equipment to get the pressure of 6 different coarse-grained red sandstone soil compaction tests - Displacement Relationship and Analysis of the Effect of Coarse Content on Static Compaction Deformation Characteristics. The results show that the stress and strain of red sandstone with different coarse-grained contents are in exponential relationship with each other under static compaction. Under the same stress, when the coarse-grained content is 60%, the soil produces the highest strain. Granular content The compressive modulus of red sandstone soil has a linear relationship with the final value of the corresponding stress range. When the coarse content is 60%, the compressive modulus of soil is the lowest and the compressibility is the highest in the same stress range. The process of static compaction of granular soil can be divided into three stages, which are compacting stage, crushing stage and steady stage respectively. During static compaction, there is an inflection point for strain growth. The appearance of strain inflection point marks the red sandstone coarse Changes in Deformation Stage of Particle Static Compaction Process.