Large-size temperature-controllable automatic stirring sedimentation compaction test device and test method thereof

Abstract

The invention discloses a large-size temperature-controllable automatic stirring sedimentation compaction test device, which comprises a sedimentation cylinder. The large-size temperature-controllable automatic stirring sedimentation compaction test device is characterized in that a water inlet pipe and a water outlet pipe are arranged at the bottom part of the sedimentation cylinder; the bottom part of the sedimentation cylinder is further provided with an air inlet valve used for identical internal air inlet stirring; the bottom part in the sedimentation cylinder is provided with an air inlet pressing plate used for stirring a water body; and heating equipment is also arranged in the sedimentation cylinder. Compared with the traditional sedimentation cylinder, the sedimentation cylinder developed by the invention can be used for carrying out both sedimentation process tests and silt compaction process tests, can measure the continuous concentration value along a vertical line, and is convenient to operate. In addition, water temperature, salinity, water depth, initial sand content and other parameters can be adjusted conveniently.

Description

technical field [0001] The invention belongs to the technical field of water conservancy and water transportation engineering, and in particular relates to a particle sedimentation compaction test device and an experimental method thereof. Background technique [0002] Settlement characteristics and settling velocity are the most basic and core physical quantities in the basic physical theory system of solid particles (such as sediment). The dynamic process of sedimentation of sediment and other particles in liquids (such as fresh water, salt water, etc.) is very complex. So far, there is still no unified, widely adaptable and strong theoretical formula to simply calculate the sedimentation velocity. [0003] The influencing factors of sediment settlement are very extensive, mainly including particle size, density, composition, gradation, geometry, water temperature, salinity, turbulence intensity, Reynolds number, sediment content, flocculation, flow velocity, ion concentra...

AI Technical Summary

Problems solved by technology

According to the comprehensive literature, most of the research results on the sedimentation rate have specific applicable conditions and scopes, and it is impossible to simply determine whether they are correct or not, because the research purposes and considerations of the researchers are different, and various conclusions are different for different situations. have strong applicability

Therefore, the existing empirical and semi-empirical formulas for sediment velocity cannot be directly applied to specific engineering practices without analysis, especially in waters with complex environments.

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