Energy evolution mechanism of red Pisha-sandstone cement soil under uniaxial compression

During the process of deformation of the Pisha-sandstone cement soil under load, energy is accumulated and dissipated, and the cement soil is deformed and destroyed under the driving of energy. In order to explore the law of energy evolution of the Pisha-sandstone cement soil under uniaxial loading, according to the evolution law of total energy, peak point total energy, peak point elastic strain energy and peak point dissipative energy of Pisha-sandstone cement soil in the process of deformation and failure under different curing ages and different cement content, this paper analyzes the influence of age and cement content on the Pisha-sandstone cement soil from the angle of energy influence. The results show that the energy dissipation is closely related to the strength attenuation of the Pisha-sandstone cement soil. The damage of the specimen in the process of loading can be reflected by the amount of dissipated energy. As the cement content increases, the effective energy ratio also increases. At different ages, the Pisha-sandstone cement soil with different cement content mainly absorbs elastic energy, and the peak strain energy can represent the storage energy limit of cement soil sample. Therefore, the effective energy ratio and peak strain energy can well reflect the ability of the Pisha-sandstone cement soil to resist failure. By using the principle of energy analysis to study the deformation process of the sandstone cement soil, it can break the previous idea of using only the traditional stress-strain strength to describe its failure characteristics, and provide new methods and ideas for the analysis of this type of material.