Land slide surge calculation method

Abstract

The invention relates to a land slide surge calculation method. The process from bank slope slip mass water entry to stages of surge propagation serves as a complete and unified process for analysis and research. The method includes the following steps that firstly, a three-dimensional finite element model is built according to existing terrain, water level and slip mass shape position data; secondly, the interaction of a water body, air and a slip mass is described by means of a Navier-Stokes equation, the free surface of a fluid is accurately captured through an improved conserving scheme Level Set method, the surge generation process is truly simulated, and reasonable preconditions are provided for surge propagation and disaster prediction; thirdly, the surge propagation process is simulated by means of a fluid control equation of an integral along the water depth, numerical forecasting is conducted on a surge motion track and an inundation area, and a surge disaster is assessed. The method has a great theoretical significance and practical value in prediction of bank slope unstable failures and surge secondary disasters, and also has a referential significance in numerical simulation of similar landslide, debris flow, barrier lakes and other geological disasters.

Description

technical field [0001] The invention relates to a landslide surge calculation method, which belongs to the field of hydraulic engineering disaster prediction. Background technique [0002] The rapid development of water conservancy and hydropower construction has made important contributions to social development, but it has also brought a series of geological environmental problems. Compared with the general slope instability problem, the slope instability of the reservoir bank will pose a greater threat to the safety of people's life and property downstream. The surge generated after the landslide slides into the reservoir may climb over the dam crest and submerge the downstream area, and even the dam may fail due to the impact of the surge. In the construction of water conservancy and hydropower projects in China, there are many precedents of reservoir landslides becoming unstable and causing surge disasters. For example, in March 1961, the Tangyan smooth slope of Zhexi...

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Problems solved by technology

In a sense, the existing method uses a rough estimate of the initial surge data as the initial calculation condition, and it is difficult to obtain reasonable and credible calculation results even if the simulation of the surge propagation process is finer

[0004] Although scholars at home and abroad have done a lot of research work on this and achieved rich research results, they basically focus on a certain aspect of research, and have not yet focused on the slope instability movement of the reservoir bank to the generation and propagation of swell waves. Numerical simulation of the whole process system

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