Simulation method and simulation system for weir dam flood overtopping and dam breaking process

Abstract

The invention provides a simulation method and a simulation system for a weir dam flood overtopping and breaking process. The method comprises the steps of obtaining information data of a barrier dam and a barrier lake, cyclically calculating the reservoir water level of the barrier lake, cyclically calculating the breach flow of the barrier dam, cyclically calculating the breach size of the barrier dam, establishing a three-dimensional spatio-temporal data model of the barrier dam and the barrier lake, performing three-dimensional dynamic display in the overtopping and dam breaking process of the barrier dam and the like. The simulation system comprises a client terminal used for receiving information data of the barrier dam and the barrier lake. The client terminal comprises a barrier lake and reservoir water calculation module, a barrier dam breach flow calculation module, a barrier dam breach size calculation module and a three-dimensional dynamic visualization module. The strong heterogeneous characteristic of the barrier dam and the water-soil coupling action mechanism of the breach are fully considered, and the accuracy of the simulation result of the barrier dam flood overtopping and dam breaking process is improved.

Description

technical field [0001] The invention relates to the technical fields of water conservancy and geological engineering disaster prediction, evaluation and prevention and control, in particular to a simulation method and a simulation system for a barrier dam flooding and dam failure process. Background technique [0002] As a special earth-rock dam, the barrier dam is widely distributed at home and abroad and has serious disaster consequences. Once the barrier dam breaks, huge floods will bring devastating disasters to the downstream areas. According to statistics, 87% of the barrier dams collapsed within one year. In addition, there are often obvious overhead zones and natural sliding surfaces inside the barrier dam body, and the structure of the dam body is loose and the cementation is weak. Under the action of rainfall and upstream water level, the dam body is prone to local instability or concentrated leakage, resulting in the danger of dam failure. Based on the above reas...

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Problems solved by technology

[0003] However, at present, most of the calculations of the flooding process of barrier dams use the homogeneous earth dam failure simulation method, or use it with slight modifications on the basis of the homogeneous earth dam failure simulation method, and the calculation process does not take into account Due to the strong heterogeneity of the material of the barrier dam and the coupling mechanism of water and soil at the breach of the barrier dam, it is difficult for the simulation results to truly reproduce the process of the flooding of the barrier dam.

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