Device and method for extracting undisturbed soil

Abstract

The invention relates to a device and a method for extracting undisturbed soil. The device comprises a main body cylinder, an opening and locking switch and a cylindrical hoisting ring, wherein the main body cylinder consists of two semi-cylindrical surfaces which can be opened and closed by taking a bus as a shaft; the opening and locking switch is arranged at the opening and closing position; and the external surface of the main body cylinder is provided with the cylindrical hoisting ring. The method comprises the following steps of: determining the area of a cylindrical soil sample, and digging at the periphery and on the lower side of the collected soil sample to reach an upper layer sampling depth; switching on the opening and locking switch on the main body cylinder, sleeving the two semi-cylindrical surfaces outside the soil sample, and closing and locking the two semi-cylindrical surfaces; separating the cylindrical soil sample from soil at the bottom of the cylindrical soil sample at the bottom of the main body cylinder; hoisting the main body cylinder carrying the cylindrical soil sample by a certain height, inserting, hoisting a base plate, putting on a transportation tool, and transporting to a specified place. The device has a simple and practical structure and is more suitable for filling the soil sample; and by the method, the original state of the soil sample can be better ensured, the soil sample is convenient to collect, and the safety factor is high.

Description

technical field [0001] The invention relates to a soil extraction technology, in particular to an extraction device and an extraction method for undisturbed soil. Background technique [0002] Soil moisture infiltration is an important link in the natural water cycle, involving surface runoff, underground runoff, soil moisture distribution after irrigation or rainfall, groundwater recharge by rainfall, soil erosion, and the migration of pollutants such as fertilizers and pesticides with water. Studying this process is of great significance for understanding surface runoff and soil infiltration, and preventing soil erosion. [0003] Significance of determining soil moisture infiltration: [0004] When the soil layer is saturated with water, the phenomenon that the water in the soil moves downward under the influence of gravity is called permeability. Soil permeability is one of the important characteristics of soil. It almost completely enters the soil with atmospheric prec...

AI Technical Summary

Problems solved by technology

[0008] (3) Problems caused by seepage: ① Seepage problem: causing water loss; ② Seepage deformation problem: seepage causes changes in the internal stress of the soil, causing seepage damage to geotechnical structures and foundations

The specific performance is that in the case of uneven soil structure, the speed of infiltration and the direction of infiltration are quite different, which eventually leads to the failure of the test.

For the same soil, the speed of infiltration and the direction of infiltration are very regular. If the preliminary work of the test is not in place and the extraction of the original soil sample is not standard, it will cause the soil moisture infiltration test to fail. try and fail

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