Abstract
The pressure distribution law of muddy water with high silt content has great influence on the stress and strain calculation of the dam body. Currently, there is a few research studies referring to the calculation method of high silt content muddy water pressure, which leads to no reliable theoretical basis for muddy water pressure calculation in dam design. In this paper, muddy water with high silt content was prepared and the imitation tests and model tests were carried out to investigate the pressure distribution law. Based on the test result analysis, it is indicated that the muddy water with high silt content is also in a flowable and viscous state, which is consistent with the law of fluid behavior; the horizontal pressure is equal to the vertical pressure at the same position, and this relationship is generally time independent; through the test result analysis, a pressure formula for muddy water with high silt content is proposed; through comparison between the pressure formula-calculated results and monitoring data, it is indicated that the proposed pressure formula is applicable in the calculation of muddy water pressure. The formula can be a useful tool in the dam safety and design calculation.
Highlights
The water conservancy project is mainly constructed for preventing water disasters and reasonable use of water resources
On the basis of the imitation and model tests, it can be verified that the pressure distribution law of the muddy water with high silt content is consistent with fluid mechanics theory, and the muddy water pressure can be calculated by the specification formula, that is, formula (1)
The calculation formula of muddy water pressure with high silt content derived in this study provides a strong theoretical basis and guidance for the design and calculation of dam engineering, which can avoid the waste of engineering investment
Summary
The water conservancy project is mainly constructed for preventing water disasters and reasonable use of water resources. High silt content in the river is a serious problem. The flow characteristics of muddy water with high silt content are quite different from those of hydrostatic fluid. Considering the flow characteristic difference between muddy water and hydrostatic fluid, here the following are some basic problems: i.e., is the water pressure calculation method of formula (1) applicable? It is indicated that there are a few research works related to the pressure distribution law and pressure calculation formula for muddy water with high silt content and its influence on the dam stress. China is taken as a research object, with the prepared muddy water with high silt content, imitation and model tests are carried out, and the pressure distribution law is investigated
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