Prediction method for tensile strength of unsaturated cohesive soil

Abstract

The invention belongs to the field of geotechnical engineering, and relates to a method for predicting the tensile strength of unsaturated cohesive soil, which comprises the following steps of: 1) constructing a prediction model of the tensile strength of the unsaturated cohesive soil; and 2) predicting the tensile strength of the unsaturated cohesive soil according to the prediction model of the tensile strength of the unsaturated cohesive soil constructed in the step 1). According to the method for predicting the tensile strength of the unsaturated cohesive soil, the tensile strength of the soil body can be indirectly predicted through the shear strength parameter and the saturation degree of the soil body, and the method has the advantages of being simple in form, clear in parameter physical significance, good in fitting effect and the like.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering, and relates to a method for predicting the tensile strength of unsaturated cohesive soil, in particular to a method for predicting the tensile strength of unsaturated cohesive soil based on the Mohr-Coulomb failure criterion. Background technique [0002] Tensile strength refers to the ability of soil to resist cracking in the process of drying and water loss. The size of this ability determines the relevant properties of soil, such as permeability and compaction. Soil is rarely used as a tensile material in practical engineering. However, studies have shown that the tensile strength of natural unsaturated cohesive soil can generally reach ten to several hundred kilopascals. Considering the tensile strength of the soil will significantly affect the stability of the entire engineering project, for example, tension cracks are almost generated before the failure of the landslide, before the c...

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Problems solved by technology

[0003] In addition, in the concept of traditional soil mechanics, the soil is usually not actively used as a tensile material, and the tensile strength of the soil is very small, so the tensile strength of the soil is often ignored or almost zero, resulting in the tensile strength of the soil. Strength theory lags far behind shear strength theory

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