Soil sampler and sampling method thereof

Abstract

The invention discloses a soil sampler and a sampling method thereof. The soil sampler comprises an outer tube, a plurality of flaps, an inner tube, a muddy-water discharge hole and a sampling tube and is characterized in that the top end of the outer tube is provided with a muddy-water discharge hole and a rubber plug; the flaps are connected to the lower end of the outer tube through hinges; thelower end of the inner tube is provided with a plurality of openings matched with flaps, and the upper end of the inner tube is provided with the muddy-water discharge hole. During sampling, the relative position of the outer tube and the inner tube is fixed to allow the flaps to be in an open state, the position of the inner tube is fixed after the soil sampler penetrates a target soil layer, the outer tube is moved downwards until the flaps are closed and the muddy-water discharge hole of the inner tube is sealed, and the relative position of the outer tube and the inner tube is fixed and the soil sampler is pulled out to take out a soil sample. The soil sampler has the advantages that soil sample disturbance caused by the sealing adsorption principle of a traditional soil sampler can be avoided, the sampling success rate of soil such as floury soil which is low in water content and viscosity, and the original state of the soil sample is guaranteed.

Description

technical field [0001] The invention belongs to the field of engineering geological exploration, and in particular relates to a soil fetcher and a using method thereof, in particular to the application of the soil fetcher in undisturbed soil sampling work. technical background [0002] Sampling with a soil extractor is a basic work in geotechnical engineering investigation, especially in undisturbed soil sampling, the quality of sampling directly affects engineering geological evaluation and geotechnical engineering design and construction. Commonly used soil fetches include open thick-walled soil fetches, thin-wall soil fetches and free piston soil fetches. [0003] At present, the principle of the earth taker is to use a ball valve or a piston to seal the earth taker pipe to form a sealed adsorption device to take out the soil sample. However, when the soil sample is lifted up, the adsorption force of the seal will disturb the soil sample, and it is difficult to form a se...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: provide a kind of earth taker and sampling method thereof, to solve that the sealing adsorption force that existing earth taker exists can disturb soil sample, to the soil with low moisture content, low viscosity such as silt The body is difficult to form a seal, and the sampling effect is not ideal, etc.

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