Homogeneous viscosity earth dam overtopping burst model for flood control emergency drills

Abstract

The invention discloses a homogeneous viscosity earth dam overtopping burst model for flood control emergency drills. The model comprises an earth dam body formed by filling viscous soil, wherein theearth dam body comprises an upstream dam shoulder, a dam top and a downstream dam shoulder, and a control gate used for adjusting the water level is arranged on the upstream of the model; and a cavitylayer is arranged at the bottom of the downstream dam shoulder of the earth dam body, and a powder sand layer fills the interior of the cavity layer. The homogeneous viscosity earth dam overtopping burst model for flood control emergency drills is particularly suitable for revealing of the viscous earth dam burst mechanism under the effect of the overtopping water flow and the display of the water and soil coupling effect in the dam breaking process, and meanwhile, the model further has the function of carrying out dam breaking disaster training on a flood control maneuvering emergency professional team.

Description

technical field [0001] The invention relates to a flood-top collapse model of a homogeneous cohesive earth dam used for flood control and rescue drills, and belongs to the technical field of earth dam test theory. Background technique [0002] According to the data of the first national water conservancy census, nearly 100,000 reservoir dams have been built in my country, of which more than 90,000 are homogeneous earth dams, and most of the reservoir projects in my country were built in the 1950s to 1970s, limited by the economic and technological conditions at that time , The dam construction standard is low and the quality is poor. Coupled with long-term insufficient investment in management funds, insufficient maintenance, serious aging and disrepair of the project, "congenital deficiencies and acquired disorders" have led to the existence of a large number of dangerous reservoirs in our country. According to the census statistics of the Dam Safety Management Center of th...

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Problems solved by technology

Because homogeneous dams are generally composed of cohesive soil, and cohesive soil has strong erosion resistance, and its start-up flow velocity is generally around 2m / s, it is difficult for small-scale model tests to meet the hydraulic conditions for its collapse. Model tests mostly use sandy soil whose start-up flow rate is about 1 / 100 of the cohesive soil, but the failure mode of sandy soil dams is shear failure, while the failure mode of cohesive soil dams is dumping failure, and the failure mechanisms of the two are completely different

[0004] (2) The scale of the model is large and the test cost is high

Large-scale physical dam failure tests can better reveal the failure mechanism of cohesive soil dams, but it is generally difficult to find a suitable test site, and the test costs are high and time-consuming. At the same time, with the increase of dam height, The risk of experimentation is also greater

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