Quantitative calculation method of crack extending depth of clay structure

Abstract

The invention relates to a quantitative calculation method of the crack extending depth of a clay structure. The method comprises the following steps: S1, a fracture belt with dense and parallel cracks is adopted for describing the macro cracks of the clay structure; S2, the fracture energy and tensile strength of the fracture belt of the clay structure for resisting crack extending capability are computed by adopting the tensile test for clay materials; S3, the dimension of the fracture belt of the clay structure is computed by adopting the computed fracture energy index; S4, element meshes are divided according to the dimension of the fracture belt; S5, the crack extending depth of a certain crack surface under action force is obtained by calculating the distortion, caused by stress of each divided element mesh with the finite element calculation method. The calculation method has the advantages of quantification, practicality, high accuracy, wide engineering application prospect, etc.

Description

technical field [0001] The invention relates to a method for quantitatively calculating the depth of crack expansion in structures such as tailings dams, soil slopes, embankments and the like piled up by clay materials. Background technique [0002] Tailings dams, soil slopes, embankments and other large-scale geotechnical projects are mostly formed by piles of clay materials, and disasters such as dam breaks, landslides, and embankment breaks of these clay structures are mostly preceded by horizontal and vertical cracks. Fully understand clay The law of crack generation and expansion in structures, quantitative calculation and prediction of crack expansion depth in clay structures are of great significance for preventing accidents in production safety and ensuring the safety of people's lives and properties around these clay structures. [0003] For a long time, scholars at home and abroad have mostly focused on the measurement of the tensile strength of clay structures. Th...

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Problems solved by technology

[0003] For a long time, scholars at home and abroad have mostly focused on the measurement of the tensile strength of clay structures. There is no quantitative calculation method for the crack propagation depth of clay structures, and there is no index to measure the ability of clay structures to resist crack expansion. Qualitative judgments and explanations are mainly based on engineering experience and the degree of compression of clay structures. These existing technologies have shortcomings such as being more affected by subjective factors, poor operability, and lack of scientific basis.

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