Device and method for sand and soil two-dimensional non-saturating percolation experiment

Abstract

The invention relates to a device and a method for sand and soil two-dimensional non-saturating percolation experiment. The device comprises an experiment box body and a water level adjusting container, wherein the experiment box body is separated into a water storage cavity and a material storage cavity by a vertical separating plate, and the water level adjusting container and the water storage cavity are communicated by a siphon tube; horizontal water seepage holes are formed in the vertical separating plate, vertical water leaking holes are formed in a bottom plate of the material storage cavity, and horizontal water leaking holes are formed in a side plate of the material storage cavity; positive panels of the water storage cavity and the material storage cavity adopt transparent panels, and the surfaces of the panels are provided with square network marking lines. The method comprises the following steps of filling experiment sand and soil into the material storage cavity, setting the water level of the water storage cavity, observing the wetting front change process of a percolation area, shooting, and recording; observing the water draining conditions of the vertical water leaking holes and the horizontal water leaking holes; when the wetting front does not change, and the percolation is stable, measuring the space distribution of non-saturating water content, sampling at the crossing point of the square network marking line, calculating the mass and volume water contents, and drawing a distribution rule map of volume water contents in the vertical and horizontal directions.

Description

technical field [0001] The invention belongs to the technical field of sand and soil unsaturated seepage experiments, in particular to a two-dimensional unsaturated seepage experiment device and method for sand and soil. Background technique [0002] The problem of unsaturated seepage of sand and soil is directly related to the safety of actual engineering, and the experimental data obtained through experimental means can be used as the theoretical basis for solving safety problems in actual engineering. [0003] At present, there have been many studies on unsaturated seepage in sand and soil at home and abroad, including the study on the spatial distribution of unsaturated water in sand and soil. By accurately measuring the spatial distribution of unsaturated water, the It is very important to solve the security problems in practical engineering. [0004] At present, the research on unsaturated seepage of sand and soil still stays in a single dimension, that is, the unsatu...

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Problems solved by technology

[0005] However, with the deepening of the research, it is found that the one-dimensional unsaturated seepage experiment of sand and soil alone is difficult to meet the safety needs of actual engineering. Due to the complexity of actual engineering, especially for slope engineering, it is very difficult to Saturated seepage is not limited to the vertical direction, but also has unsaturated seepage in the horizontal direction

Therefore, it is very necessary to upgrade the study of sand and soil unsaturated seepage to two-dimensional. For unsaturated seepage problems under complex conditions, it is no longer suitable to use the data of sand and soil one-dimensional unsaturated seepage experiments for analysis.

[0006] When faced with the study of sand and soil unsaturated seepage under two-dimensional conditions, the devices and methods currently used for sand and soil one-dimensional unsaturated seepage experiments are obviously no longer applicable, and there are no ready-made experimental devices and methods at present usable

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