Undisturbed soil sampler

Abstract

The invention discloses an undisturbed soil sampler, which comprises an inner drilling rod, a rotary handle and an inner drilling bit respectively connected with the upper and lower ends of the innerdrilling rod, an outer drilling bit sleeved outside the inner drilling bit, an outer drilling rod sleeved outside the inner drilling rod and connected with the outer drilling bit, a hammering platformconnected with the top end of the outer drilling rod, a round hammer and a sample storage box, wherein a plurality of plug holes are formed in the inner drilling rod and the outer drilling rod, and the inner drilling rod and the outer drilling rod penetrate through the plug holes through a plug to fix the inner drilling rod and the outer drilling rod; a seal is arranged at the top of the inner drilling bit, an exhaust hole is formed in the side wall, and a plurality of knife edges are arranged at the bottom, the inner drilling bit drills through the knife edges, blocks the soil from enteringthe inner drilling rod through the seal, and exhausts air of the inner drilling bit through the exhaust hole; the round hammer impacts the hammering platform after removing the rotary handle and pulling out the plug, so that the outer drilling bit continues to drill along with the outer drilling rod; a convergent opening is formed in the bottom of the outer drilling bit to collect the soil; and the sample storage box is aligned with the convergent opening to store soil in the outer drilling bit. The device is low in cost, simple and practical, accurate in sampling and easy to carry.

Description

Technical field [0001] The invention relates to the technical field of soil environment monitoring, in particular to an undisturbed soil sampler. Background technique [0002] In the work of soil environmental investigation, the ability to collect undisturbed soil at a certain depth and keep it intact is the basis for the next step of the detection of the material components in the soil and the geotechnical test. It is to accurately determine the composition of the soil, understand the parameters of the soil properties, and evaluate the soil. The degree of pollution is the key to soil research. [0003] The existing soil sampling technology is mainly divided into two types: mechanical power and manual. Mechanical power samplers such as diesel drilling rigs use diesel engines as power. The rotation of the drill rod drives the drill bit to apply pressure at the same time, so that the drill bit drills down and reaches the soil. Pull out the drill bit after positioning, hit the vibrat...

AI Technical Summary

Problems solved by technology

This kind of manual soil drilling drill will cause agitation to the soil during the drilling process of the drill bit, destroying the original properties of the soil; when the sample is taken out, it needs to be knocked and vibrated to shake the soil from the drill bit, some clayey soil or soil samples with high moisture content It cannot be taken out quickly, reducing the sampling efficiency, and further destroying the integrity of the sample during the sample taking process

In addition, none of the above samplers have matching soil sample storage devices, which may easily cause secondary pollution to the samples or change the properties of the samples during sample storage and transportation.

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