Improved double-ring penetration test method for ensuring vertical infiltration of inner-ring moisture

Abstract

The invention belongs to the field of soil infiltration measurement, and particularly relates to an improved double-ring permeability test method for ensuring vertical infiltration of inner-ring moisture, which is used for determining a soil permeability coefficient. According to the method, the double-ring penetration test is improved, the dug space replaces an outer ring of a traditional double-ring test, strict vertical infiltration of water in the inner ring is ensured, the defect of lateral infiltration of water in the inner ring of the traditional double-ring test is overcome, and meanwhile, the wetting front is visible. The method provided by the invention solves the problem that vertical infiltration of water cannot be ensured when the permeability coefficient is measured by a traditional double-ring test, and meanwhile, real-time infiltration information of the soil body is mastered by combining an obtained wetting front migration curve and a soil body water content curve obtained by sensor data, and researches such as establishment of an infiltration model and the like are further carried out. From a new perspective, a new thought is provided for the design of a soil infiltration measurement test, and more accurate basic research data is provided for the fields of various soil hydraulic research, agricultural irrigation scheme adjustment, geological disaster prevention and control and the like.

Description

technical field [0001] The invention belongs to the field of soil infiltration measurement, and in particular relates to an improved double-ring infiltration test method for ensuring the vertical infiltration of water in an inner ring. Background technique [0002] The infiltration performance of soil is one of the extremely important basic physical properties to describe the speed of soil infiltration. In various scientific researches, such as hydrology, environmental engineering, ecology, agronomy, civil engineering, hydraulic engineering, geotechnical engineering, Fields such as geohazardology are among the most fundamental parameters. Soil infiltration performance determines the distribution of surface water, soil water and groundwater water resources, and is an important basic parameter for the calculation of global or regional water balance; in the design of farmland irrigation schemes, especially in water-saving irrigation , it is necessary to determine the intensity...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the traditional double-ring test that the outer ring cannot ensure the vertical one-dimensional infiltration of water in the inner ring and the depth of the wetting front cannot be determined, the present invention provides an improved double-ring penetration test method that ensures the vertical infiltration of water in the inner ring. The excavated space makes the wetting front visible, and the depth of wetting front migration can be directly measured. In addition, sensors such as soil volumetric moisture content sensors and matrix suction sensors can be installed on the side walls of the soil column

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