Method and device for measuring infiltration performance and permeability coefficient of field slope surface

Abstract

The invention discloses a method for measuring infiltration performance and permeability coefficient of a field slope surface, which adopts a field slope surface double-ring infiltration instrument, and the device includes a concentric double-ring structure slope for pressing into the surface soil of a field slope The infiltration ring (3) and a rainfall tube (2) of the same concentric double-ring structure used to make the rainfall in the inner and outer rings of the slope infiltration ring (3) adaptively equal to the saturated infiltration without ponding and two Marriott tanks (1) for supplying water to the double loops of the rainfall cylinders (2). The measurement method of the present invention obtains the zero-pressure saturated infiltration-time relationship on the surface of the soil layer by realizing the saturated wetting of the slope surface (including the horizontal surface) without water infiltration and the measurement of its rainfall, so as to obtain the soil surface The rainfall infiltration performance and saturated permeability coefficient.

Description

technical field [0001] The invention relates to a method and device for measuring permeability coefficient in water conservancy projects, in particular to a method and device for measuring infiltration performance and permeability coefficient of field slope surface. Background technique [0002] The hydraulic conductivity is also called the hydraulic conductivity. In isotropic media, it is defined as the unit flow rate under the unit hydraulic gradient, indicating the difficulty of fluid passing through the pore skeleton. [0003] In hydraulic engineering or geological engineering, it is often necessary to measure the permeability coefficient of the field surface to judge the geological infiltration capacity. There are concentric ring method and artificial rainfall method for measuring field surface infiltration capacity. The concentric ring method presses the concentric ring into the soil layer, treats the soil surface in the ring as a horizontal plane, applies a constant...

AI Technical Summary

Problems solved by technology

The concentric ring method needs to treat the surface of the soil layer as a horizontal plane, and cannot directly measure the infiltration of natural slopes. The calculation of the permeability coefficient must also be determined by the estimation of the seepage diameter, and it is difficult to calculate accurately; the artificial rainfall method needs to measure the yield It is difficult to accurately measure the production flow in real time, and it is not applicable to the horizontal surface. On the other hand, it is also difficult to determine the infiltration range, and it is also difficult to accurately calculate the permeability coefficient of the soil surface.

[0004] Therefore, for the measurement of the infiltration capacity and permeability coefficient of the field slope surface, there is no better method and device in this field.

Images