System and method for adjusting seepage water pressure in slope with variable water level

Abstract

The invention discloses a system and a method for adjusting seepage water pressure in a slope with a variable water level. The system comprises a water collecting anchor pipe at least partially arranged in the slope, a driver and a drainage pipe connected with the driver and the water collecting anchor pipe; when the water level drops, water in the water collecting anchor pipe enters the driver through the drainage pipe and is discharged through the driver; the method comprises the following steps: water level decline internal seepage water pressure adjustment is conducted; according to water level decline internal seepage water pressure adjustment, when the reservoir water level declines, decline of the underground water level in the slope lags behind the water level outside the slope, water in the water collecting anchor pipe is discharged under the combined action of suction force and pressure difference, and the water level in the slope is lowered. The system for adjusting seepage water pressure in the slope with the variable water level has the advantages that disturbance to the undisturbed soil body of the bank slope is small, underground water in the slope body above the reservoir water level can be synchronously discharged along with descending of reservoir water, the outward seepage water pressure in the bank slope is effectively reduced, and the stability of the bank slope is improved.

Description

technical field [0001] The invention belongs to the field of reservoir bank slope protection and prevention, and relates to a drainage device and method capable of synchronously draining groundwater in the reservoir bank slope above the reservoir water level as the reservoir water level drops. Background technique [0002] Deformation and failure of reservoir bank slopes often cause huge losses to industrial and agricultural production as well as people's lives and property. In various forms of damage such as bank slope collapses and landslides, changes in reservoir water level often induce the slope to develop in an unstable direction. important factor. During the rising period of the reservoir water level, the reservoir water seeps into the rock body under the action of water pressure, which will lead to the concentration of pore pressure and reduce the effective stress on the structural surface. During the reservoir water level decline period, if the reservoir water leve...

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Problems solved by technology

[0003] There are many deficiencies in conventional bank slope protection measures. Not only is the amount of engineering large, it is extremely labor-intensive and material resources-intensive, and it cannot solve the impact of the hysteresis of the groundwater level drop in the slope on the stability of the bank slope when the water level in the reservoir drops. During the decline of the reservoir water level, the water in the bank slope above the reservoir water level line is simultaneously discharged, so the infiltration water pressure from the slope to the outside cannot be eliminated in time, which is extremely unfavorable for maintaining the stability of the bank slope

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