Method for establishing and computing unsaturated expansive soil shear strength interval constitutive model

Abstract

The invention discloses a method for establishing and computing an unsaturated expansive soil shear strength interval constitutive model. Through the method, based on a probability theory and a geotechnical testing principle, a parameter interval value range in an unsaturated expansive soil shear strength interval analysis model is obtained; by utilizing a computing method of interval mathematics, the interval range of an unsaturated expansive soil shear strength value is solved; unsaturated expansive soil shear strength parameters calculated by applying the method not only are capable of ensuring the correctness of shear strength parameter values but also are capable of improving the universality of the application of the unsaturated expansive soil shear strength model. Unsaturated expansive soil shear strength is computed by utilizing the method, and therefore not only can the accuracy of the solved unsaturated expansive soil shear strength parameters be guaranteed but also the complexity of the unsaturated expansive soil shear strength parameters can be fully embodied; the problem that the accuracy and the complexity of the unsaturated expansive soil shear strength parameters cannot be fully expressed by point variables is solved, and the universality and the applicability of the unsaturated expansive soil shear strength model are greatly improved.

Description

technical field [0001] The invention relates to a construction and calculation method of an interval constitutive model of shear strength of unsaturated expansive soil. Background technique [0002] Due to the complexity of rock and soil mechanics properties, geotechnical testing has become an important content of rock and soil mechanics. However, due to the structural properties of unsaturated expansive soil and many influencing factors of geotechnical parameters, in-situ testing and engineering prototype monitoring have become an indispensable part of engineering practice. Soil mechanics research and geotechnical practice can never be separated from geotechnical experiment work. Wrong and inaccurate geotechnical parameter values ​​have greater errors than the geotechnical constitutive model itself. [0003] At present, in the calculation and analysis of the constitutive model of unsaturated expansive soil, point variables are often used to express the mechanical paramete...

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Problems solved by technology

Wrong, inaccurate values ​​of geotechnical parameters are larger than the error of the geotechnical constitutive model itself

[0003] At present, in the calculation and analysis of the constitutive model of unsaturated expansive soil, point variables are often used to express the mechanical parameters in the constitutive model, which is inconsistent with the actual situation that there is a certain range or error in the soil test

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