A Leakage Early Warning Method for Clay Inclined Wall Earth-rock Dam

Abstract

The invention discloses a new leakage early warning method for earth-rock dams with inclined walls of clay. By calculating the final settlement of the dam foundation and inclined walls of clay, the theoretical relationship between the void ratio and the permeability coefficient of inclined walls of earth-rock dams is established, and the earth-rock dam is determined according to the settlement monitoring data. The settlement displacement of the clay slope wall, and then determine the void ratio of the clay slope wall of the earth-rock dam, and then determine the reference theoretical permeability coefficient of the clay slope wall of the earth-rock dam, and then calculate and determine the clay slope wall of the earth-rock dam according to the monitoring data of the piezo tube water level in the dam body. The comparison item of permeability coefficient is to compare and analyze the two permeability coefficients to determine the gain ratio of the permeability coefficient of the clay slope wall of the earth-rock dam, and then judge the leakage risk warning level of the clay slope wall of the earth-rock dam by the size of the gain ratio. Only based on the daily monitoring of dam settlement and infiltration line, it is convenient and quick to carry out scientific monitoring and early warning analysis on the leakage of clay inclined wall earth-rock dams. The early warning method is stable and reliable, and the practical application value is higher.

Description

technical field [0001] The invention belongs to the field of early warning of leakage of clay slanted wall earth-rock dams, and in particular relates to a leakage early warning method for clay slanted wall earth-rock dams based on subsidence joint soak line monitoring. Background technique [0002] At present, the seepage monitoring of earth-rockfill dams with inclined walls of clay mostly uses piezometric tube monitoring, and the seepage line and seepage characteristics of the earth-rockfill dam are judged by analyzing the monitoring data of the piezometric tube, and then the seepage risk of the earth-rockfill dam is judged according to the change of the soaking line , but because the piezometer tube cannot monitor the change of the soaking line in the clay inclined wall of the earth-rockfill dam, there are defects in the leakage risk monitoring of the earth-rockfill dam. In addition, earth-rock dams also use the inversion analysis method of permeability coefficient to anal...

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Problems solved by technology

[0002] At present, the seepage monitoring of earth-rockfill dams with inclined walls of clay mostly uses piezometric tube monitoring, and the seepage line and seepage characteristics of the earth-rockfill dam are judged by analyzing the monitoring data of the piezometric tube, and then the seepage risk of the earth-rockfill dam is judged according to the change of the soaking line , but because the piezometer tube cannot monitor the change of the soaking line in the clay slope wall of the earth-rock dam, the leakage risk monitoring of the earth-rock dam is flawed

In addition, earth-rock dams also use the inversion analysis method of permeability coefficient to analyze the anti-seepage effect of the dam clay slope wall, but most of them use BP neural network, numerical simulation and other methods, and the BP neural network method requires a large amount of data for training. Mainly rely on the nonlinear mapping relationship to establish the relationship between each parameter and the permeability coefficient, lack of scientific physical and mechanical theoretical support, and the accuracy of the results is uncertain

Numerical simulation is to establish a mathematical model based on actual engineering and related physical and mechanical parameters for calculation. The results are relatively accurate, but its accuracy mainly depends on the selection of calculation rules, boundary conditions and related physical and mechanical parameters, and the modeling process is relatively cumbersome.

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