Soil-structure interaction calculation method under humidification effect of underground reservoir

Abstract

The invention discloses a soil-structure interaction calculation method under the humidification effect of an underground reservoir. The method specifically comprises the steps of constructing a concrete geometric structure model and a soil body geometric structure model of a regulation and storage reservoir; setting parameters of a soil body and a reservoir concrete material; defining generalized stretching, a pressure function variable, a soil strength index and a modulus related effective saturation function variable; setting each boundary condition; setting parameters of fluid attributes and basic attributes of a water body; adding research, and calculating research 1; performing Boolean operation and segmentation on the reservoir boundary again; setting parameters of a Richards' equation; based on the research 1, adding a reservoir water injection function by using auxiliary scanning; setting a time unit and a time step of research 2; adding and setting all parameter conditions of solid mechanics; based on the research 2, adding and setting research 3; and performing data mapping after result calculation. By means of the method, numerical calculation of a non-leakage stage and a leakage stage of an underground reservoir can be achieved, and the stress conditions of the reservoir structure and the soil body when leakage does not occur or the stress conditions of the reservoir structure in different leakage time periods under the conditions of different water storage heights, self weights and soil body loads can be obtained.

Description

technical field [0001] The invention belongs to the technical field of soil-structure interaction calculation methods under multi-field coupling, and in particular relates to a soil-structure interaction calculation method under humidification of an underground reservoir. Background technique [0002] In order to build a green "sponge city" and solve the problem of urban waterlogging during the rainy season, the construction of urban underground storage reservoirs has become one of the solutions. The numerical simulation technology of soil seepage-stress coupling plays an indispensable role in the research of underground engineering, foundation pit and other disciplines. Through the establishment of a seepage-stress coupling numerical calculation platform, the complex three-dimensional seepage and stress field problems in the stability analysis process of underground structures can be scientifically analyzed and reasonably predicted. This technology ensures the safety and r...

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Problems solved by technology

This characteristic will cause a series of problems in engineering practice, such as uneven settlement of building structures leading to structural cracking, etc.

Such engineering problems are more likely to be encountered in the construction of underground storage reservoirs in collapsible loess areas

However, in traditional engineering simulation, the mechanical response of the interaction between soil and structure in the unsaturated seepage water field and mechanical field stress coupling is not considered, which is far from the actual phenomenon.

In actual engineering practice, it has not played the role of real simulation, actual prevention, and targeted guidance

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