Complete water and soil coupling based land subsidence information processing method

Abstract

The invention relates to a complete water and soil coupling based land subsidence information processing method. The complete water and soil coupling based land subsidence information processing method includes steps of 1) detecting soil state to acquire soil layer stress information through a detecting module and transmitting the information to a discretization module and subsidence calculating module; 2) discretizing control equation, balance equation and continuity equation of complete water and soil coupling theory by the discretization module according to soil layer stress information and transmitting to the subsidence calculating module; 3) calculating complete water and soil coupling on the basis of a subloading cam-clay model by means of a finite element method according to the soil layer stress information and the control equation, the balance equation and the continuity equation subjected to discretization, and acquiring subsidence displacement increment. Compared with the prior art, characteristics of unloading and reloading of clay can be reasonably described, stress drifting from a yield surface can be accurately avoided on the basis of complete implicit-expression backward Euler diagram return algorithm during stress updating calculation, so it is unnecessary to judge whether to achieve yield or not by means of integral algorithm .

Description

technical field [0001] The invention relates to a land subsidence information processing method, in particular to a land subsidence information processing method based on complete coupling of water and soil. Background technique [0002] Land subsidence refers to a geological disaster phenomenon in which the loose soil layer on the surface of the crust is compressed due to natural factors or human activities, resulting in a decrease in the ground level. Since the first discovery of land subsidence in Niigata, Japan in 1898, it has become a global problem, especially in my country, Japan, and the United States. [0003] The first city in my country to discover the phenomenon of land subsidence was Shanghai. Since the 1980s, with the rapid development of social economy, the scale of groundwater exploitation has continued to expand, especially the rapid development of engineering construction. Expanding, and the subsidence range is increasing. Since land subsidence is gradual,...

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Problems solved by technology

In addition, once the normal consolidated clay is unloaded and reloaded, it will be in an over-consolidated state, and plastic strain will also occur, which cannot be reflected in the model

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