Swelling soil humidifying and swelling numerical simulation method under rainfall infiltration condition

Abstract

The invention discloses a swelling soil humidifying and swelling numerical simulation method under the rainfall infiltration condition. The swelling soil humidifying and swelling numerical simulation method comprises the following steps: adopting a fluid-solid coupling module and compiling a relevant FISH language program, and realizing the relation of change of the non-saturated region matrix suction, the non-saturated permeability coefficient and the soil strength parameter along with the moisture content in the unsaturated seepage process; then based on the 'humidity stress field theory', according to the similarity of a seepage continuity differential equation and a heat conduction equation, deducing the equivalent conversion relation of a thermodynamic parameter and a seepage parameter, and adopting a thermodynamic module to realize swelling soil swelling deformation process under the humidifying condition. According to the swelling soil humidifying and swelling numerical simulation method, the swelling soil humidifying and swelling whole-process numerical calculation under the rainfall infiltration condition can be effectively and comprehensively realized, so that effective scientific guidance means are provided for engineering design and construction in the high-risk area of the swelling soil engineering disaster, and meanwhile application of the computational soil mechanics to the technical fields of practical engineering construction, geological disaster prevention and control, and the like, is powerfully driven.

Description

technical field [0001] The invention belongs to the technical field of computational soil mechanics and engineering disaster prevention, and relates to a numerical calculation method, in particular to a numerical simulation method for expansive soil humidification and expansion under the condition of rainfall infiltration. Background technique [0002] There are more than 40 countries with expansive soils in the world, and compared with other countries, the problem of expansive soils in my country is particularly prominent. First of all, expansive soils are widely distributed in my country, basically covering a large area of ​​land between the southwest Yunnan-Guizhou Plateau and the North China Plain. Secondly, there are many kinds of expansive soils, and the formation reasons and engineering characteristics of expansive soils in different regions are not the same, which has significant regional characteristics. With the acceleration of my country's infrastructure construc...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem that the existing numerical calculation cannot truly reflect the expansion and deformation of expansive soil under humidification conditions, and then provide a reasonable and comprehensive numerical value considering the process of unsaturated seepage and expansion deformation under the condition of rainfall infiltration calculation method

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