Anti-knock protection method for improvement of safety performance of concrete gravity dam

Abstract

The invention discloses an anti-knock protection method for improvement of safety performance of a concrete gravity dam. The method includes the steps: step 1, acquiring characteristic parameters of the concrete gravity dam according to practical conditions; step 2, respectively establishing underwater explosion fully-coupled models corresponding to different reservoir water levels according to a Lagrangian-Eulerian full coupling method, carrying out numerical calculation on the basis of the underwater explosion fully-coupled models to acquire concrete gravity dam damage spatial distribution characteristics corresponding to different reservoir water levels; step 3, contrastively analyzing the concrete gravity dam damage spatial distribution characteristics corresponding to different reservoir water levels to acquire the optimal anti-knock safety performance of the concrete gravity dam when the reservoir water level is below the elevation of a downstream slope apron of the dam; step 4, lowering the reservoir water level to be below the elevation of the downstream slope apron of the dam in wartime. The anti-knock protection method for improvement of the safety performance of the concrete gravity dam has the advantages of high operability, easiness in implementation, low extra appropriation expenditure and remarkable improvement of the anti-knock performance of the concrete gravity dam and is especially applicable to improvement of the anti-knock safety performance of built concrete gravity dams.

Description

technical field [0001] The invention relates to an anti-explosion protection method for improving the safety performance of a concrete gravity dam, which is suitable for anti-explosion safety protection of dam bodies in wartime. Background technique [0002] In recent years, terrorist attacks have occurred frequently all over the world, and concrete gravity dams with obvious political and economic benefits have become the key targets of terrorists. my country is in a period of rapid development of high dams, a large number of 100-300m high dams have been built or are under construction, such as Longyangxia Hydropower Station (178m), Ertan Hydropower Station (240m), and Huangdeng Hydropower Station on the Lancang River (202m) , Baihetan Hydropower Station (284m), etc. These dams have high water levels and large storage capacity. Once they fail, they will cause huge casualties and property losses downstream. Therefore, it is an important strategy to strengthen the anti-blast pr...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, anti-knock protection for dams is mainly carried out from two aspects of active protection and passive protection. Active protection refers to the use of various high-tech to actively intercept and strike missiles, such as directly erecting intercepting missiles around high dams, To prevent long-range nuclear attacks, but if the enemy does not directly attack the dam, but detonates a nuclear bomb in a distant reservoir to form an underwater shock wave to hit the dam, it is difficult to implement because the interception range is too large

Passive protection refers to the use of engineering measures to passively improve the anti-blast performance of the dam, such as reinforcement of weak parts of the dam and selection of protective layers. However, these anti-blast protection methods are not very operable and difficult to implement for high dams that have been built.

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